diff --git a/node_modules/.bin/fxparser b/node_modules/.bin/fxparser new file mode 120000 index 00000000..75327ed9 --- /dev/null +++ b/node_modules/.bin/fxparser @@ -0,0 +1 @@ +../fast-xml-parser/src/cli/cli.js \ No newline at end of file diff --git a/node_modules/.package-lock.json b/node_modules/.package-lock.json index 88813a5a..fbf37560 100644 --- a/node_modules/.package-lock.json +++ b/node_modules/.package-lock.json @@ -39,6 +39,15 @@ "node": ">=6.9.0" } }, + "node_modules/@buttercup/fetch": { + "version": "0.2.1", + "resolved": "https://registry.npmjs.org/@buttercup/fetch/-/fetch-0.2.1.tgz", + "integrity": "sha512-sCgECOx8wiqY8NN1xN22BqqKzXYIG2AicNLlakOAI4f0WgyLVUbAigMf8CZhBtJxdudTcB1gD5lciqi44jwJvg==", + "license": "MIT", + "optionalDependencies": { + "node-fetch": "^3.3.0" + } + }, "node_modules/@csstools/color-helpers": { "version": "5.0.2", "resolved": "https://registry.npmjs.org/@csstools/color-helpers/-/color-helpers-5.0.2.tgz", @@ -2650,6 +2659,12 @@ "resolved": 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"https://registry.npmjs.org/camelcase-css/-/camelcase-css-2.0.1.tgz", @@ -2793,6 +2814,15 @@ } ] }, + "node_modules/charenc": { + "version": "0.0.2", + "resolved": "https://registry.npmjs.org/charenc/-/charenc-0.0.2.tgz", + "integrity": "sha512-yrLQ/yVUFXkzg7EDQsPieE/53+0RlaWTs+wBrvW36cyilJ2SaDWfl4Yj7MtLTXleV9uEKefbAGUPv2/iWSooRA==", + "license": "BSD-3-Clause", + "engines": { + "node": "*" + } + }, "node_modules/chokidar": { "version": "3.6.0", "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.6.0.tgz", @@ -2977,6 +3007,15 @@ "node": ">= 8" } }, + "node_modules/crypt": { + "version": "0.0.2", + "resolved": "https://registry.npmjs.org/crypt/-/crypt-0.0.2.tgz", + "integrity": "sha512-mCxBlsHFYh9C+HVpiEacem8FEBnMXgU9gy4zmNC+SXAZNB/1idgp/aulFJ4FgCi7GPEVbfyng092GqL2k2rmow==", + "license": "BSD-3-Clause", + "engines": { + "node": "*" + } + }, "node_modules/cssesc": { "version": "3.0.0", "resolved": "https://registry.npmjs.org/cssesc/-/cssesc-3.0.0.tgz", @@ -3116,6 +3155,15 @@ "node": ">=12" } }, + "node_modules/data-uri-to-buffer": { + "version": "4.0.1", + "resolved": "https://registry.npmjs.org/data-uri-to-buffer/-/data-uri-to-buffer-4.0.1.tgz", + "integrity": "sha512-0R9ikRb668HB7QDxT1vkpuUBtqc53YyAwMwGeUFKRojY/NWKvdZ+9UYtRfGmhqNbRkTSVpMbmyhXipFFv2cb/A==", + "license": "MIT", + "engines": { + "node": ">= 12" + } + }, "node_modules/data-urls": { "version": "5.0.0", "resolved": "https://registry.npmjs.org/data-urls/-/data-urls-5.0.0.tgz", @@ -3445,6 +3493,24 @@ "node": ">=6" } }, + "node_modules/fast-xml-parser": { + "version": "4.5.3", + "resolved": "https://registry.npmjs.org/fast-xml-parser/-/fast-xml-parser-4.5.3.tgz", + "integrity": "sha512-RKihhV+SHsIUGXObeVy9AXiBbFwkVk7Syp8XgwN5U3JV416+Gwp/GO9i0JYKmikykgz/UHRrrV4ROuZEo/T0ig==", + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/NaturalIntelligence" + } + ], + "license": "MIT", + "dependencies": { + "strnum": "^1.1.1" + }, + "bin": { + "fxparser": "src/cli/cli.js" + } + }, "node_modules/fastq": { "version": "1.18.0", "resolved": "https://registry.npmjs.org/fastq/-/fastq-1.18.0.tgz", @@ -3453,6 +3519,29 @@ "reusify": "^1.0.4" } }, + "node_modules/fetch-blob": { + "version": "3.2.0", + "resolved": "https://registry.npmjs.org/fetch-blob/-/fetch-blob-3.2.0.tgz", + "integrity": "sha512-7yAQpD2UMJzLi1Dqv7qFYnPbaPx7ZfFK6PiIxQ4PfkGPyNyl2Ugx+a/umUonmKqjhM4DnfbMvdX6otXq83soQQ==", + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/jimmywarting" + }, + { + "type": "paypal", + "url": "https://paypal.me/jimmywarting" + } + ], + "license": "MIT", + "dependencies": { + "node-domexception": "^1.0.0", + "web-streams-polyfill": "^3.0.3" + }, + "engines": { + "node": "^12.20 || >= 14.13" + } + }, "node_modules/fill-range": { "version": "7.1.1", "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.1.1.tgz", @@ -3479,6 +3568,18 @@ "url": "https://github.com/sponsors/isaacs" } }, + "node_modules/formdata-polyfill": { + "version": 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"sha512-T1GITYmFaKuO91vxyoQMFETst+O71VUPEU3ze5GNzDm0OWdP8v1ziTaAEPUr/3kLsY3Sftgz242A1SetQiDL7g==", + "license": "BSD-3-Clause", + "dependencies": { + "charenc": "0.0.2", + "crypt": "0.0.2", + "is-buffer": "~1.1.6" + } + }, "node_modules/merge2": { "version": "1.4.1", "resolved": "https://registry.npmjs.org/merge2/-/merge2-1.4.1.tgz", @@ -4189,6 +4319,12 @@ "node": "^10 || ^12 || ^13.7 || ^14 || >=15.0.1" } }, + "node_modules/nested-property": { + "version": "4.0.0", + "resolved": "https://registry.npmjs.org/nested-property/-/nested-property-4.0.0.tgz", + "integrity": "sha512-yFehXNWRs4cM0+dz7QxCd06hTbWbSkV0ISsqBfkntU6TOY4Qm3Q88fRRLOddkGh2Qq6dZvnKVAahfhjcUvLnyA==", + "license": "MIT" + }, "node_modules/next": { "version": "15.3.1", "resolved": "https://registry.npmjs.org/next/-/next-15.3.1.tgz", @@ -4311,6 +4447,44 @@ "node": "^10 || ^12 || >=14" } }, + "node_modules/node-domexception": { + "version": "1.0.0", + "resolved": "https://registry.npmjs.org/node-domexception/-/node-domexception-1.0.0.tgz", + "integrity": "sha512-/jKZoMpw0F8GRwl4/eLROPA3cfcXtLApP0QzLmUT/HuPCZWyB7IY9ZrMeKw2O/nFIqPQB3PVM9aYm0F312AXDQ==", + "deprecated": "Use your platform's native DOMException instead", + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/jimmywarting" + }, + { + "type": "github", + "url": "https://paypal.me/jimmywarting" + } + ], + "license": "MIT", + "engines": { + "node": ">=10.5.0" + } + }, + "node_modules/node-fetch": { + "version": "3.3.2", + "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-3.3.2.tgz", + "integrity": "sha512-dRB78srN/l6gqWulah9SrxeYnxeddIG30+GOqK/9OlLVyLg3HPnr6SqOWTWOXKRwC2eGYCkZ59NNuSgvSrpgOA==", + "license": "MIT", + "dependencies": { + "data-uri-to-buffer": "^4.0.0", + "fetch-blob": "^3.1.4", + "formdata-polyfill": "^4.0.10" + }, + "engines": { + "node": "^12.20.0 || ^14.13.1 || >=16.0.0" + }, + "funding": { + "type": "opencollective", + "url": "https://opencollective.com/node-fetch" + } + }, "node_modules/node-gettext": { "version": "3.0.0", "resolved": "https://registry.npmjs.org/node-gettext/-/node-gettext-3.0.0.tgz", @@ -4480,6 +4654,12 @@ "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.7.tgz", "integrity": "sha512-LDJzPVEEEPR+y48z93A0Ed0yXb8pAByGWo/k5YYdYgpY2/2EsOsksJrq7lOHxryrVOn1ejG6oAp8ahvOIQD8sw==" }, + "node_modules/path-posix": { + "version": "1.0.0", + "resolved": "https://registry.npmjs.org/path-posix/-/path-posix-1.0.0.tgz", + "integrity": "sha512-1gJ0WpNIiYcQydgg3Ed8KzvIqTsDpNwq+cjBCssvBtuTWjEqY1AW+i+OepiEMqDCzyro9B2sLAe4RBPajMYFiA==", + "license": "ISC" + }, "node_modules/path-scurry": { "version": "1.11.1", "resolved": "https://registry.npmjs.org/path-scurry/-/path-scurry-1.11.1.tgz", @@ -5016,6 +5196,12 @@ "node": ">=6" } }, + "node_modules/querystringify": { + "version": "2.2.0", + "resolved": "https://registry.npmjs.org/querystringify/-/querystringify-2.2.0.tgz", + "integrity": "sha512-FIqgj2EUvTa7R50u0rGsyTftzjYmv/a3hO345bZNrqabNqjtgiDMgmo4mkUjd+nzU5oF3dClKqFIPUKybUyqoQ==", + "license": "MIT" + }, "node_modules/queue-microtask": { "version": "1.2.3", "resolved": "https://registry.npmjs.org/queue-microtask/-/queue-microtask-1.2.3.tgz", @@ -5336,6 +5522,12 @@ "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.14.1.tgz", "integrity": "sha512-dYnhHh0nJoMfnkZs6GmmhFknAGRrLznOu5nc9ML+EJxGvrx6H7teuevqVqCuPcPK//3eDrrjQhehXVx9cnkGdw==" }, + "node_modules/requires-port": { + "version": "1.0.0", + "resolved": "https://registry.npmjs.org/requires-port/-/requires-port-1.0.0.tgz", + "integrity": "sha512-KigOCHcocU3XODJxsu8i/j8T9tzT4adHiecwORRQ0ZZFcp7ahwXuRU1m+yuO90C5ZUyGeGfocHDI14M3L3yDAQ==", + "license": "MIT" + }, "node_modules/resolve": { "version": "1.22.10", "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.22.10.tgz", @@ -5709,6 +5901,18 @@ "node": ">=8" } }, + "node_modules/strnum": { + "version": "1.1.2", + "resolved": "https://registry.npmjs.org/strnum/-/strnum-1.1.2.tgz", + "integrity": "sha512-vrN+B7DBIoTTZjnPNewwhx6cBA/H+IS7rfW68n7XxC1y7uoiGQBxaKzqucGUgavX15dJgiGztLJ8vxuEzwqBdA==", + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/NaturalIntelligence" + } + ], + "license": "MIT" + }, "node_modules/styled-jsx": { "version": "5.1.6", "resolved": "https://registry.npmjs.org/styled-jsx/-/styled-jsx-5.1.6.tgz", @@ -5988,6 +6192,25 @@ "browserslist": ">= 4.21.0" } }, + "node_modules/url-join": { + "version": "5.0.0", + "resolved": "https://registry.npmjs.org/url-join/-/url-join-5.0.0.tgz", + "integrity": "sha512-n2huDr9h9yzd6exQVnH/jU5mr+Pfx08LRXXZhkLLetAMESRj+anQsTAh940iMrIetKAmry9coFuZQ2jY8/p3WA==", + "license": "MIT", + "engines": { + "node": "^12.20.0 || ^14.13.1 || >=16.0.0" + } + }, + "node_modules/url-parse": { + "version": "1.5.10", + "resolved": "https://registry.npmjs.org/url-parse/-/url-parse-1.5.10.tgz", + "integrity": 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+ "@buttercup/fetch": "^0.2.1", + "base-64": "^1.0.0", + "byte-length": "^1.0.2", + "entities": "^6.0.0", + "fast-xml-parser": "^4.5.1", + "hot-patcher": "^2.0.1", + "layerr": "^3.0.0", + "md5": "^2.3.0", + "minimatch": "^9.0.5", + "nested-property": "^4.0.0", + "node-fetch": "^3.3.2", + "path-posix": "^1.0.0", + "url-join": "^5.0.0", + "url-parse": "^1.5.10" + }, + "engines": { + "node": ">=14" + } + }, + "node_modules/webdav/node_modules/entities": { + "version": "6.0.0", + "resolved": "https://registry.npmjs.org/entities/-/entities-6.0.0.tgz", + "integrity": "sha512-aKstq2TDOndCn4diEyp9Uq/Flu2i1GlLkc6XIDQSDMuaFE3OPW5OphLCyQ5SpSJZTb4reN+kTcYru5yIfXoRPw==", + "license": "BSD-2-Clause", + "engines": { + "node": ">=0.12" + }, + "funding": { + "url": "https://github.com/fb55/entities?sponsor=1" + } + }, "node_modules/webidl-conversions": { "version": "7.0.0", "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-7.0.0.tgz", diff --git a/node_modules/@buttercup/fetch/LICENSE b/node_modules/@buttercup/fetch/LICENSE new file mode 100644 index 00000000..f7479430 --- /dev/null +++ b/node_modules/@buttercup/fetch/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2023 Buttercup + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/node_modules/@buttercup/fetch/README.md b/node_modules/@buttercup/fetch/README.md new file mode 100644 index 00000000..c84d9152 --- /dev/null +++ b/node_modules/@buttercup/fetch/README.md @@ -0,0 +1,44 @@ +# Fetch +> Fetch adapter for cross-platform use. + +[![Buttercup](https://cdn.rawgit.com/buttercup-pw/buttercup-assets/6582a033/badge/buttercup-slim.svg)](https://buttercup.pw) [![npm (scoped)](https://img.shields.io/npm/v/@buttercup/fetch)](https://www.npmjs.com/package/@buttercup/fetch) ![Tests](https://github.com/buttercup/fetch/actions/workflows/test.yml/badge.svg) + +## About + +This library exports `fetch` in various environments, such as within a browser or under NodeJS: + + * Browsers get the native `window.fetch` + * NodeJS gets `node-fetch` + +_This library was designed to be used primarily within Buttercup and its supporting libraries: Features and fixes implemented here will be oriented to furthering Buttercup's goals, and unnessarily changes may be rejected due to that._ + +## Installation + +For browser use you need only install this library: + +```shell +npm install @buttercup/fetch --save-dev +``` + +For NodeJS use you must also install `node-fetch`: + +```shell +npm install @buttercup/fetch node-fetch --save +``` + +## Usage + +You can import the various components related to fetch regardless of the entry your application uses: + +```typescript +import { + fetch, + Headers, + Request, + Response +} from "@buttercup/fetch"; + +// ... + +const res = await fetch("https://..."); +``` diff --git a/node_modules/@buttercup/fetch/dist/index.browser.d.ts b/node_modules/@buttercup/fetch/dist/index.browser.d.ts new file mode 100644 index 00000000..96d520ff --- /dev/null +++ b/node_modules/@buttercup/fetch/dist/index.browser.d.ts @@ -0,0 +1,20 @@ +declare global { + var WorkerGlobalScope: any; +} +export declare const fetch: any; +export declare const Headers: { + new (init?: HeadersInit): Headers; + prototype: Headers; +}; +export declare const Request: { + new (input: globalThis.RequestInfo | URL, init?: globalThis.RequestInit): Request; + prototype: Request; +}; +export declare const Response: { + new (body?: BodyInit, init?: ResponseInit): Response; + prototype: Response; + error(): Response; + redirect(url: string | URL, status?: number): Response; +}; +export type RequestInfo = Parameters[0]; +export type RequestInit = Parameters[1]; diff --git a/node_modules/@buttercup/fetch/dist/index.browser.js b/node_modules/@buttercup/fetch/dist/index.browser.js new file mode 100644 index 00000000..8db416e9 --- /dev/null +++ b/node_modules/@buttercup/fetch/dist/index.browser.js @@ -0,0 +1,11 @@ +const inWebWorker = typeof WorkerGlobalScope !== "undefined" && + self instanceof WorkerGlobalScope; +const root = inWebWorker + ? self + : typeof window !== "undefined" + ? window + : globalThis; +export const fetch = root.fetch.bind(root); +export const Headers = root.Headers; +export const Request = root.Request; +export const Response = root.Response; diff --git a/node_modules/@buttercup/fetch/dist/index.node.d.ts b/node_modules/@buttercup/fetch/dist/index.node.d.ts new file mode 100644 index 00000000..9d57cc21 --- /dev/null +++ b/node_modules/@buttercup/fetch/dist/index.node.d.ts @@ -0,0 +1,2 @@ +import fetch, { Headers, Request, RequestInfo, RequestInit, Response } from "node-fetch"; +export { fetch, Headers, Request, RequestInfo, RequestInit, Response }; diff --git a/node_modules/@buttercup/fetch/dist/index.node.js b/node_modules/@buttercup/fetch/dist/index.node.js new file mode 100644 index 00000000..d217ee3d --- /dev/null +++ b/node_modules/@buttercup/fetch/dist/index.node.js @@ -0,0 +1,2 @@ +import fetch, { Headers, Request, Response, } from "node-fetch"; +export { fetch, Headers, Request, Response }; diff --git a/node_modules/@buttercup/fetch/package.json b/node_modules/@buttercup/fetch/package.json new file mode 100644 index 00000000..91944b1e --- /dev/null +++ b/node_modules/@buttercup/fetch/package.json @@ -0,0 +1,65 @@ +{ + "name": "@buttercup/fetch", + "version": "0.2.1", + "description": "Fetch adapter for cross-platform use.", + "type": "module", + "exports": { + ".": { + "browser": "./dist/index.browser.js", + "default": "./dist/index.node.js" + } + }, + "react-native": "./dist/index.browser.js", + "types": "./dist/index.node.d.ts", + "scripts": { + "build": "npm run clean && tsc", + "clean": "rimraf dist", + "format": "prettier --write \"{source,test}/**/*.{js,ts}\"", + "prepublishOnly": "npm run build", + "test": "npm run test:node && npm run test:format", + "test:format": "prettier --check \"{source,test}/**/*.{js,ts}\"", + "test:node": "npm run build && mocha 'test/node/**.spec.js'" + }, + "files": [ + "./dist/**/*" + ], + "repository": { + "type": "git", + "url": "git+https://github.com/buttercup/fetch.git" + }, + "lint-staged": { + "{source,test}/**/*.{js,ts}": [ + "prettier --write" + ] + }, + "husky": { + "hooks": { + "pre-commit": "lint-staged" + } + }, + "keywords": [ + "fetch", + "request" + ], + "author": "Perry Mitchell ", + "license": "MIT", + "bugs": { + "url": "https://github.com/buttercup/fetch/issues" + }, + "homepage": "https://github.com/buttercup/fetch#readme", + "devDependencies": { + "@types/node": "^18.11.18", + "chai": "^4.3.7", + "husky": "^4.3.8", + "json-server": "^0.17.1", + "lint-staged": "^13.1.0", + "mocha": "^10.2.0", + "prettier": "^2.8.3", + "rimraf": "^4.1.2", + "typescript": "^4.9.5", + "url-join": "^5.0.0" + }, + "optionalDependencies": { + "node-fetch": "^3.3.0" + } +} diff --git a/node_modules/base-64/LICENSE-MIT.txt b/node_modules/base-64/LICENSE-MIT.txt new file mode 100644 index 00000000..a41e0a7e --- /dev/null +++ b/node_modules/base-64/LICENSE-MIT.txt @@ -0,0 +1,20 @@ +Copyright Mathias Bynens + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/node_modules/base-64/README.md b/node_modules/base-64/README.md new file mode 100644 index 00000000..ab0ef251 --- /dev/null +++ b/node_modules/base-64/README.md @@ -0,0 +1,112 @@ +# base64 [![Build status](https://travis-ci.org/mathiasbynens/base64.svg?branch=master)](https://travis-ci.org/mathiasbynens/base64) [![Code coverage status](http://img.shields.io/coveralls/mathiasbynens/base64/master.svg)](https://coveralls.io/r/mathiasbynens/base64) + +_base64_ is a robust base64 encoder/decoder that is fully compatible with [`atob()` and `btoa()`](https://html.spec.whatwg.org/multipage/webappapis.html#atob), written in JavaScript. The base64-encoding and -decoding algorithms it uses are fully [RFC 4648](https://tools.ietf.org/html/rfc4648#section-4) compliant. + +## Installation + +Via [npm](https://www.npmjs.com/): + +```bash +npm install base-64 +``` + +In a browser: + +```html + +``` + +In [Narwhal](http://narwhaljs.org/), [Node.js](https://nodejs.org/), and [RingoJS](http://ringojs.org/): + +```js +var base64 = require('base-64'); +``` + +In [Rhino](http://www.mozilla.org/rhino/): + +```js +load('base64.js'); +``` + +Using an AMD loader like [RequireJS](http://requirejs.org/): + +```js +require( + { + 'paths': { + 'base64': 'path/to/base64' + } + }, + ['base64'], + function(base64) { + console.log(base64); + } +); +``` + +## API + +### `base64.version` + +A string representing the semantic version number. + +### `base64.encode(input)` + +This function takes a byte string (the `input` parameter) and encodes it according to base64. The input data must be in the form of a string containing only characters in the range from U+0000 to U+00FF, each representing a binary byte with values `0x00` to `0xFF`. The `base64.encode()` function is designed to be fully compatible with [`btoa()` as described in the HTML Standard](https://html.spec.whatwg.org/multipage/webappapis.html#dom-windowbase64-btoa). + +```js +var encodedData = base64.encode(input); +``` + +To base64-encode any Unicode string, [encode it as UTF-8 first](https://github.com/mathiasbynens/utf8.js#utf8encodestring): + +```js +var base64 = require('base-64'); +var utf8 = require('utf8'); + +var text = 'foo © bar 𝌆 baz'; +var bytes = utf8.encode(text); +var encoded = base64.encode(bytes); +console.log(encoded); +// → 'Zm9vIMKpIGJhciDwnYyGIGJheg==' +``` + +### `base64.decode(input)` + +This function takes a base64-encoded string (the `input` parameter) and decodes it. The return value is in the form of a string containing only characters in the range from U+0000 to U+00FF, each representing a binary byte with values `0x00` to `0xFF`. The `base64.decode()` function is designed to be fully compatible with [`atob()` as described in the HTML Standard](https://html.spec.whatwg.org/multipage/webappapis.html#dom-windowbase64-atob). + +```js +var decodedData = base64.decode(encodedData); +``` + +To base64-decode UTF-8-encoded data back into a Unicode string, [UTF-8-decode it](https://github.com/mathiasbynens/utf8.js#utf8decodebytestring) after base64-decoding it: + +```js +var encoded = 'Zm9vIMKpIGJhciDwnYyGIGJheg=='; +var bytes = base64.decode(encoded); +var text = utf8.decode(bytes); +console.log(text); +// → 'foo © bar 𝌆 baz' +``` + +## Support + +_base64_ is designed to work in at least Node.js v0.10.0, Narwhal 0.3.2, RingoJS 0.8-0.9, PhantomJS 1.9.0, Rhino 1.7RC4, as well as old and modern versions of Chrome, Firefox, Safari, Opera, and Internet Explorer. + +## Unit tests & code coverage + +After cloning this repository, run `npm install` to install the dependencies needed for development and testing. You may want to install Istanbul _globally_ using `npm install istanbul -g`. + +Once that’s done, you can run the unit tests in Node using `npm test` or `node tests/tests.js`. To run the tests in Rhino, Ringo, Narwhal, and web browsers as well, use `grunt test`. + +To generate the code coverage report, use `grunt cover`. + +## Author + +| [![twitter/mathias](https://gravatar.com/avatar/24e08a9ea84deb17ae121074d0f17125?s=70)](https://twitter.com/mathias "Follow @mathias on Twitter") | +|---| +| [Mathias Bynens](https://mathiasbynens.be/) | + +## License + +_base64_ is available under the [MIT](https://mths.be/mit) license. diff --git a/node_modules/base-64/base64.js b/node_modules/base-64/base64.js new file mode 100644 index 00000000..0b335e5c --- /dev/null +++ b/node_modules/base-64/base64.js @@ -0,0 +1,164 @@ +/*! https://mths.be/base64 v1.0.0 by @mathias | MIT license */ +;(function(root) { + + // Detect free variables `exports`. + var freeExports = typeof exports == 'object' && exports; + + // Detect free variable `module`. + var freeModule = typeof module == 'object' && module && + module.exports == freeExports && module; + + // Detect free variable `global`, from Node.js or Browserified code, and use + // it as `root`. + var freeGlobal = typeof global == 'object' && global; + if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) { + root = freeGlobal; + } + + /*--------------------------------------------------------------------------*/ + + var InvalidCharacterError = function(message) { + this.message = message; + }; + InvalidCharacterError.prototype = new Error; + InvalidCharacterError.prototype.name = 'InvalidCharacterError'; + + var error = function(message) { + // Note: the error messages used throughout this file match those used by + // the native `atob`/`btoa` implementation in Chromium. + throw new InvalidCharacterError(message); + }; + + var TABLE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'; + // http://whatwg.org/html/common-microsyntaxes.html#space-character + var REGEX_SPACE_CHARACTERS = /[\t\n\f\r ]/g; + + // `decode` is designed to be fully compatible with `atob` as described in the + // HTML Standard. http://whatwg.org/html/webappapis.html#dom-windowbase64-atob + // The optimized base64-decoding algorithm used is based on @atk’s excellent + // implementation. https://gist.github.com/atk/1020396 + var decode = function(input) { + input = String(input) + .replace(REGEX_SPACE_CHARACTERS, ''); + var length = input.length; + if (length % 4 == 0) { + input = input.replace(/==?$/, ''); + length = input.length; + } + if ( + length % 4 == 1 || + // http://whatwg.org/C#alphanumeric-ascii-characters + /[^+a-zA-Z0-9/]/.test(input) + ) { + error( + 'Invalid character: the string to be decoded is not correctly encoded.' + ); + } + var bitCounter = 0; + var bitStorage; + var buffer; + var output = ''; + var position = -1; + while (++position < length) { + buffer = TABLE.indexOf(input.charAt(position)); + bitStorage = bitCounter % 4 ? bitStorage * 64 + buffer : buffer; + // Unless this is the first of a group of 4 characters… + if (bitCounter++ % 4) { + // …convert the first 8 bits to a single ASCII character. + output += String.fromCharCode( + 0xFF & bitStorage >> (-2 * bitCounter & 6) + ); + } + } + return output; + }; + + // `encode` is designed to be fully compatible with `btoa` as described in the + // HTML Standard: http://whatwg.org/html/webappapis.html#dom-windowbase64-btoa + var encode = function(input) { + input = String(input); + if (/[^\0-\xFF]/.test(input)) { + // Note: no need to special-case astral symbols here, as surrogates are + // matched, and the input is supposed to only contain ASCII anyway. + error( + 'The string to be encoded contains characters outside of the ' + + 'Latin1 range.' + ); + } + var padding = input.length % 3; + var output = ''; + var position = -1; + var a; + var b; + var c; + var buffer; + // Make sure any padding is handled outside of the loop. + var length = input.length - padding; + + while (++position < length) { + // Read three bytes, i.e. 24 bits. + a = input.charCodeAt(position) << 16; + b = input.charCodeAt(++position) << 8; + c = input.charCodeAt(++position); + buffer = a + b + c; + // Turn the 24 bits into four chunks of 6 bits each, and append the + // matching character for each of them to the output. + output += ( + TABLE.charAt(buffer >> 18 & 0x3F) + + TABLE.charAt(buffer >> 12 & 0x3F) + + TABLE.charAt(buffer >> 6 & 0x3F) + + TABLE.charAt(buffer & 0x3F) + ); + } + + if (padding == 2) { + a = input.charCodeAt(position) << 8; + b = input.charCodeAt(++position); + buffer = a + b; + output += ( + TABLE.charAt(buffer >> 10) + + TABLE.charAt((buffer >> 4) & 0x3F) + + TABLE.charAt((buffer << 2) & 0x3F) + + '=' + ); + } else if (padding == 1) { + buffer = input.charCodeAt(position); + output += ( + TABLE.charAt(buffer >> 2) + + TABLE.charAt((buffer << 4) & 0x3F) + + '==' + ); + } + + return output; + }; + + var base64 = { + 'encode': encode, + 'decode': decode, + 'version': '1.0.0' + }; + + // Some AMD build optimizers, like r.js, check for specific condition patterns + // like the following: + if ( + typeof define == 'function' && + typeof define.amd == 'object' && + define.amd + ) { + define(function() { + return base64; + }); + } else if (freeExports && !freeExports.nodeType) { + if (freeModule) { // in Node.js or RingoJS v0.8.0+ + freeModule.exports = base64; + } else { // in Narwhal or RingoJS v0.7.0- + for (var key in base64) { + base64.hasOwnProperty(key) && (freeExports[key] = base64[key]); + } + } + } else { // in Rhino or a web browser + root.base64 = base64; + } + +}(this)); diff --git a/node_modules/base-64/package.json b/node_modules/base-64/package.json new file mode 100644 index 00000000..479b0a18 --- /dev/null +++ b/node_modules/base-64/package.json @@ -0,0 +1,43 @@ +{ + "name": "base-64", + "version": "1.0.0", + "description": "A robust base64 encoder/decoder that is fully compatible with `atob()` and `btoa()`, written in JavaScript.", + "homepage": "https://mths.be/base64", + "main": "base64.js", + "keywords": [ + "codec", + "decoder", + "encoder", + "base64", + "atob", + "btoa" + ], + "license": "MIT", + "author": { + "name": "Mathias Bynens", + "url": "https://mathiasbynens.be/" + }, + "repository": { + "type": "git", + "url": "https://github.com/mathiasbynens/base64.git" + }, + "bugs": "https://github.com/mathiasbynens/base64/issues", + "files": [ + "LICENSE-MIT.txt", + "base64.js" + ], + "scripts": { + "test": "mocha tests/tests.js", + "build": "grunt build" + }, + "devDependencies": { + "coveralls": "^2.11.4", + "grunt": "^0.4.5", + "grunt-cli": "^1.3.2", + "grunt-shell": "^1.1.2", + "grunt-template": "^0.2.3", + "istanbul": "^0.4.0", + "mocha": "^6.2.0", + "regenerate": "^1.2.1" + } +} diff --git a/node_modules/byte-length/README.md b/node_modules/byte-length/README.md new file mode 100644 index 00000000..9c22675d --- /dev/null +++ b/node_modules/byte-length/README.md @@ -0,0 +1,66 @@ +

+ +
+ Byte-Length +
+ + + + API Stability + + + + TypeScript + + + + Styled with prettier + + + + Build status + + + + Test Coverage + + + + NPM Version + + + + Downloads + + + + Browser Bundle Size + +

+ +Calculate the real byte length of any string. + +# Why +In node many will use `Buffer.byteLength`, however including the entire buffer shim in the browser just for getting the byte length of a string is not very conservative. + +# Installation + +```console +npm install byte-length +``` + +# Example + +```javascript +import { byteLength } from "byte-length"; + +byteLength("hello"); //-> 5 +byteLength("😀"); //-> 4 +byteLength("ｆｕｌｌｗｉｄｔｈ　ｃｈａｒａｃｔｅｒｓ"); //-> 60 +``` + +### Contributions + +* Use `npm test` to run tests. + +Please feel free to create a PR! diff --git a/node_modules/byte-length/dist/index.d.ts b/node_modules/byte-length/dist/index.d.ts new file mode 100644 index 00000000..c1a2bbf3 --- /dev/null +++ b/node_modules/byte-length/dist/index.d.ts @@ -0,0 +1,4 @@ +export declare function byteLength(str: string | { + toString(): string; + [x: string]: any; +}): number; diff --git a/node_modules/byte-length/dist/index.js b/node_modules/byte-length/dist/index.js new file mode 100644 index 00000000..e9aab215 --- /dev/null +++ b/node_modules/byte-length/dist/index.js @@ -0,0 +1,27 @@ +"use strict"; +Object.defineProperty(exports, "__esModule", { value: true }); +/* + * Calculate the byte lengths for utf8 encoded strings. + */ +function byteLength(str) { + if (!str) { + return 0; + } + str = str.toString(); + var len = str.length; + for (var i = str.length; i--;) { + var code = str.charCodeAt(i); + if (0xdc00 <= code && code <= 0xdfff) { + i--; + } + if (0x7f < code && code <= 0x7ff) { + len++; + } + else if (0x7ff < code && code <= 0xffff) { + len += 2; + } + } + return len; +} +exports.byteLength = byteLength; +//# sourceMappingURL=index.js.map \ No newline at end of file diff --git a/node_modules/byte-length/dist/index.js.map b/node_modules/byte-length/dist/index.js.map new file mode 100644 index 00000000..ca5ead13 --- /dev/null +++ b/node_modules/byte-length/dist/index.js.map @@ -0,0 +1 @@ +{"version":3,"file":"index.js","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":";;AAAA;;GAEG;AACH,oBACE,GAAsD;IAEtD,EAAE,CAAC,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC;QACT,MAAM,CAAC,CAAC,CAAC;IACX,CAAC;IAED,GAAG,GAAG,GAAG,CAAC,QAAQ,EAAE,CAAC;IACrB,IAAI,GAAG,GAAG,GAAG,CAAC,MAAM,CAAC;IAErB,GAAG,CAAC,CAAC,IAAI,CAAC,GAAG,GAAG,CAAC,MAAM,EAAE,CAAC,EAAE,GAAI,CAAC;QAC/B,IAAM,IAAI,GAAG,GAAG,CAAC,UAAU,CAAC,CAAC,CAAC,CAAC;QAC/B,EAAE,CAAC,CAAC,MAAM,IAAI,IAAI,IAAI,IAAI,IAAI,MAAM,CAAC,CAAC,CAAC;YACrC,CAAC,EAAE,CAAC;QACN,CAAC;QAED,EAAE,CAAC,CAAC,IAAI,GAAG,IAAI,IAAI,IAAI,IAAI,KAAK,CAAC,CAAC,CAAC;YACjC,GAAG,EAAE,CAAC;QACR,CAAC;QAAC,IAAI,CAAC,EAAE,CAAC,CAAC,KAAK,GAAG,IAAI,IAAI,IAAI,IAAI,MAAM,CAAC,CAAC,CAAC;YAC1C,GAAG,IAAI,CAAC,CAAC;QACX,CAAC;IACH,CAAC;IAED,MAAM,CAAC,GAAG,CAAC;AACb,CAAC;AAxBD,gCAwBC"} \ No newline at end of file diff --git a/node_modules/byte-length/package.json b/node_modules/byte-length/package.json new file mode 100644 index 00000000..7df22842 --- /dev/null +++ b/node_modules/byte-length/package.json @@ -0,0 +1,54 @@ +{ + "name": "byte-length", + "description": "Get the real byte length of a string.", + "version": "1.0.2", + "author": "Dylan Piercey ", + "bugs": "https://github.com/DylanPiercey/byte-length/issues", + "devDependencies": { + "@types/mocha": "^2.2.43", + "@types/node": "^8.0.34", + "coveralls": "^3.0.0", + "husky": "^0.14.3", + "lint-staged": "^4.2.3", + "mocha": "^4.0.1", + "nyc": "^11.2.1", + "prettier": "^1.7.4", + "ts-node": "^3.3.0", + "tslint": "^5.7.0", + "tslint-config-prettier": "^1.5.0", + "typescript": "^2.5.3" + }, + "files": [ + "dist" + ], + "homepage": "https://github.com/DylanPiercey/byte-length", + "keywords": [ + "bytes", + "content-length", + "length", + "string" + ], + "license": "MIT", + "lint-staged": { + "*.ts": [ + "prettier --write", + "tslint -t codeFrame -c tslint.json", + "git add" + ] + }, + "main": "dist/index.js", + "repository": { + "type": "git", + "url": "https://github.com/DylanPiercey/byte-length" + }, + "scripts": { + "build": "tsc", + "coveralls": "cat coverage/lcov.info | coveralls", + "format-all": "find {src,test} -name '*.ts' | xargs prettier --write", + "mocha": "mocha -r ts-node/register ./test/**/*.test.ts", + "precommit": "lint-staged && npm test && npm run build", + "test": "nyc --extension=.ts --include=src/**/*.ts --reporter=lcov --reporter=text-summary npm run mocha", + "test-ci": "nyc --extension=.ts --include=src/**/*.ts --reporter=lcovonly --reporter=text npm run mocha" + }, + "types": "dist/index.d.ts" +} diff --git a/node_modules/charenc/LICENSE.mkd b/node_modules/charenc/LICENSE.mkd new file mode 100644 index 00000000..96d4c428 --- /dev/null +++ b/node_modules/charenc/LICENSE.mkd @@ -0,0 +1,27 @@ +Copyright © 2011, Paul Vorbach. All rights reserved. +Copyright © 2009, Jeff Mott. All rights reserved. + +All rights reserved. + +Redistribution and use in source and binary forms, with or without modification, +are permitted provided that the following conditions are met: + +* Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. +* Redistributions in binary form must reproduce the above copyright notice, this + list of conditions and the following disclaimer in the documentation and/or + other materials provided with the distribution. +* Neither the name Crypto-JS nor the names of its contributors may be used to + endorse or promote products derived from this software without specific prior + written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR +ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON +ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/node_modules/charenc/README.js b/node_modules/charenc/README.js new file mode 100644 index 00000000..cfb1baa0 --- /dev/null +++ b/node_modules/charenc/README.js @@ -0,0 +1 @@ +**enc** provides crypto character encoding utilities. diff --git a/node_modules/charenc/charenc.js b/node_modules/charenc/charenc.js new file mode 100644 index 00000000..6627f9d2 --- /dev/null +++ b/node_modules/charenc/charenc.js @@ -0,0 +1,33 @@ +var charenc = { + // UTF-8 encoding + utf8: { + // Convert a string to a byte array + stringToBytes: function(str) { + return charenc.bin.stringToBytes(unescape(encodeURIComponent(str))); + }, + + // Convert a byte array to a string + bytesToString: function(bytes) { + return decodeURIComponent(escape(charenc.bin.bytesToString(bytes))); + } + }, + + // Binary encoding + bin: { + // Convert a string to a byte array + stringToBytes: function(str) { + for (var bytes = [], i = 0; i < str.length; i++) + bytes.push(str.charCodeAt(i) & 0xFF); + return bytes; + }, + + // Convert a byte array to a string + bytesToString: function(bytes) { + for (var str = [], i = 0; i < bytes.length; i++) + str.push(String.fromCharCode(bytes[i])); + return str.join(''); + } + } +}; + +module.exports = charenc; diff --git a/node_modules/charenc/package.json b/node_modules/charenc/package.json new file mode 100644 index 00000000..aece3107 --- /dev/null +++ b/node_modules/charenc/package.json @@ -0,0 +1,24 @@ +{ + "author": "Paul Vorbach (http://vorb.de)", + "name": "charenc", + "description": "character encoding utilities", + "tags": [ + "utf8", + "binary", + "byte", + "string" + ], + "version": "0.0.2", + "license": "BSD-3-Clause", + "repository": { + "type": "git", + "url": "git://github.com/pvorb/node-charenc.git" + }, + "bugs": { + "url": "https://github.com/pvorb/node-charenc/issues" + }, + "main": "charenc.js", + "engines": { + "node": "*" + } +} diff --git a/node_modules/crypt/LICENSE.mkd b/node_modules/crypt/LICENSE.mkd new file mode 100644 index 00000000..96d4c428 --- /dev/null +++ b/node_modules/crypt/LICENSE.mkd @@ -0,0 +1,27 @@ +Copyright © 2011, Paul Vorbach. All rights reserved. +Copyright © 2009, Jeff Mott. All rights reserved. + +All rights reserved. + +Redistribution and use in source and binary forms, with or without modification, +are permitted provided that the following conditions are met: + +* Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. +* Redistributions in binary form must reproduce the above copyright notice, this + list of conditions and the following disclaimer in the documentation and/or + other materials provided with the distribution. +* Neither the name Crypto-JS nor the names of its contributors may be used to + endorse or promote products derived from this software without specific prior + written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR +ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON +ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/node_modules/crypt/README.mkd b/node_modules/crypt/README.mkd new file mode 100644 index 00000000..2b1169fc --- /dev/null +++ b/node_modules/crypt/README.mkd @@ -0,0 +1 @@ +**crypt** provides utilities for encryption and hashing diff --git a/node_modules/crypt/crypt.js b/node_modules/crypt/crypt.js new file mode 100644 index 00000000..4ec09076 --- /dev/null +++ b/node_modules/crypt/crypt.js @@ -0,0 +1,96 @@ +(function() { + var base64map + = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/', + + crypt = { + // Bit-wise rotation left + rotl: function(n, b) { + return (n << b) | (n >>> (32 - b)); + }, + + // Bit-wise rotation right + rotr: function(n, b) { + return (n << (32 - b)) | (n >>> b); + }, + + // Swap big-endian to little-endian and vice versa + endian: function(n) { + // If number given, swap endian + if (n.constructor == Number) { + return crypt.rotl(n, 8) & 0x00FF00FF | crypt.rotl(n, 24) & 0xFF00FF00; + } + + // Else, assume array and swap all items + for (var i = 0; i < n.length; i++) + n[i] = crypt.endian(n[i]); + return n; + }, + + // Generate an array of any length of random bytes + randomBytes: function(n) { + for (var bytes = []; n > 0; n--) + bytes.push(Math.floor(Math.random() * 256)); + return bytes; + }, + + // Convert a byte array to big-endian 32-bit words + bytesToWords: function(bytes) { + for (var words = [], i = 0, b = 0; i < bytes.length; i++, b += 8) + words[b >>> 5] |= bytes[i] << (24 - b % 32); + return words; + }, + + // Convert big-endian 32-bit words to a byte array + wordsToBytes: function(words) { + for (var bytes = [], b = 0; b < words.length * 32; b += 8) + bytes.push((words[b >>> 5] >>> (24 - b % 32)) & 0xFF); + return bytes; + }, + + // Convert a byte array to a hex string + bytesToHex: function(bytes) { + for (var hex = [], i = 0; i < bytes.length; i++) { + hex.push((bytes[i] >>> 4).toString(16)); + hex.push((bytes[i] & 0xF).toString(16)); + } + return hex.join(''); + }, + + // Convert a hex string to a byte array + hexToBytes: function(hex) { + for (var bytes = [], c = 0; c < hex.length; c += 2) + bytes.push(parseInt(hex.substr(c, 2), 16)); + return bytes; + }, + + // Convert a byte array to a base-64 string + bytesToBase64: function(bytes) { + for (var base64 = [], i = 0; i < bytes.length; i += 3) { + var triplet = (bytes[i] << 16) | (bytes[i + 1] << 8) | bytes[i + 2]; + for (var j = 0; j < 4; j++) + if (i * 8 + j * 6 <= bytes.length * 8) + base64.push(base64map.charAt((triplet >>> 6 * (3 - j)) & 0x3F)); + else + base64.push('='); + } + return base64.join(''); + }, + + // Convert a base-64 string to a byte array + base64ToBytes: function(base64) { + // Remove non-base-64 characters + base64 = base64.replace(/[^A-Z0-9+\/]/ig, ''); + + for (var bytes = [], i = 0, imod4 = 0; i < base64.length; + imod4 = ++i % 4) { + if (imod4 == 0) continue; + bytes.push(((base64map.indexOf(base64.charAt(i - 1)) + & (Math.pow(2, -2 * imod4 + 8) - 1)) << (imod4 * 2)) + | (base64map.indexOf(base64.charAt(i)) >>> (6 - imod4 * 2))); + } + return bytes; + } + }; + + module.exports = crypt; +})(); diff --git a/node_modules/crypt/package.json b/node_modules/crypt/package.json new file mode 100644 index 00000000..240cab76 --- /dev/null +++ b/node_modules/crypt/package.json @@ -0,0 +1,22 @@ +{ + "author": "Paul Vorbach (http://vorb.de)", + "name": "crypt", + "description": "utilities for encryption and hashing", + "tags": [ + "hash", + "security" + ], + "version": "0.0.2", + "license": "BSD-3-Clause", + "repository": { + "type": "git", + "url": "git://github.com/pvorb/node-crypt.git" + }, + "bugs": { + "url": "https://github.com/pvorb/node-crypt/issues" + }, + "main": "crypt.js", + "engines": { + "node": "*" + } +} diff --git a/node_modules/data-uri-to-buffer/README.md b/node_modules/data-uri-to-buffer/README.md new file mode 100644 index 00000000..d0f2e059 --- /dev/null +++ b/node_modules/data-uri-to-buffer/README.md @@ -0,0 +1,88 @@ +data-uri-to-buffer +================== +### Generate a Buffer instance from a [Data URI][rfc] string +[![Build Status](https://travis-ci.org/TooTallNate/node-data-uri-to-buffer.svg?branch=master)](https://travis-ci.org/TooTallNate/node-data-uri-to-buffer) + +This module accepts a ["data" URI][rfc] String of data, and returns a +node.js `Buffer` instance with the decoded data. + + +Installation +------------ + +Install with `npm`: + +``` bash +$ npm install data-uri-to-buffer +``` + + +Example +------- + +``` js +import dataUriToBuffer from 'data-uri-to-buffer'; + +// plain-text data is supported +let uri = 'data:,Hello%2C%20World!'; +let decoded = dataUriToBuffer(uri); +console.log(decoded.toString()); +// 'Hello, World!' + +// base64-encoded data is supported +uri = 'data:text/plain;base64,SGVsbG8sIFdvcmxkIQ%3D%3D'; +decoded = dataUriToBuffer(uri); +console.log(decoded.toString()); +// 'Hello, World!' +``` + + +API +--- + +### dataUriToBuffer(String uri) → Buffer + +The `type` property on the Buffer instance gets set to the main type portion of +the "mediatype" portion of the "data" URI, or defaults to `"text/plain"` if not +specified. + +The `typeFull` property on the Buffer instance gets set to the entire +"mediatype" portion of the "data" URI (including all parameters), or defaults +to `"text/plain;charset=US-ASCII"` if not specified. + +The `charset` property on the Buffer instance gets set to the Charset portion of +the "mediatype" portion of the "data" URI, or defaults to `"US-ASCII"` if the +entire type is not specified, or defaults to `""` otherwise. + +*Note*: If the only the main type is specified but not the charset, e.g. +`"data:text/plain,abc"`, the charset is set to the empty string. The spec only +defaults to US-ASCII as charset if the entire type is not specified. + + +License +------- + +(The MIT License) + +Copyright (c) 2014 Nathan Rajlich <nathan@tootallnate.net> + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +'Software'), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +[rfc]: http://tools.ietf.org/html/rfc2397 diff --git a/node_modules/data-uri-to-buffer/dist/index.d.ts b/node_modules/data-uri-to-buffer/dist/index.d.ts new file mode 100644 index 00000000..2a3d91ef --- /dev/null +++ b/node_modules/data-uri-to-buffer/dist/index.d.ts @@ -0,0 +1,15 @@ +/// +export interface MimeBuffer extends Buffer { + type: string; + typeFull: string; + charset: string; +} +/** + * Returns a `Buffer` instance from the given data URI `uri`. + * + * @param {String} uri Data URI to turn into a Buffer instance + * @returns {Buffer} Buffer instance from Data URI + * @api public + */ +export declare function dataUriToBuffer(uri: string): MimeBuffer; +export default dataUriToBuffer; diff --git a/node_modules/data-uri-to-buffer/dist/index.js b/node_modules/data-uri-to-buffer/dist/index.js new file mode 100644 index 00000000..4ddd0799 --- /dev/null +++ b/node_modules/data-uri-to-buffer/dist/index.js @@ -0,0 +1,53 @@ +/** + * Returns a `Buffer` instance from the given data URI `uri`. + * + * @param {String} uri Data URI to turn into a Buffer instance + * @returns {Buffer} Buffer instance from Data URI + * @api public + */ +export function dataUriToBuffer(uri) { + if (!/^data:/i.test(uri)) { + throw new TypeError('`uri` does not appear to be a Data URI (must begin with "data:")'); + } + // strip newlines + uri = uri.replace(/\r?\n/g, ''); + // split the URI up into the "metadata" and the "data" portions + const firstComma = uri.indexOf(','); + if (firstComma === -1 || firstComma <= 4) { + throw new TypeError('malformed data: URI'); + } + // remove the "data:" scheme and parse the metadata + const meta = uri.substring(5, firstComma).split(';'); + let charset = ''; + let base64 = false; + const type = meta[0] || 'text/plain'; + let typeFull = type; + for (let i = 1; i < meta.length; i++) { + if (meta[i] === 'base64') { + base64 = true; + } + else if (meta[i]) { + typeFull += `;${meta[i]}`; + if (meta[i].indexOf('charset=') === 0) { + charset = meta[i].substring(8); + } + } + } + // defaults to US-ASCII only if type is not provided + if (!meta[0] && !charset.length) { + typeFull += ';charset=US-ASCII'; + charset = 'US-ASCII'; + } + // get the encoded data portion and decode URI-encoded chars + const encoding = base64 ? 'base64' : 'ascii'; + const data = unescape(uri.substring(firstComma + 1)); + const buffer = Buffer.from(data, encoding); + // set `.type` and `.typeFull` properties to MIME type + buffer.type = type; + buffer.typeFull = typeFull; + // set the `.charset` property + buffer.charset = charset; + return buffer; +} +export default dataUriToBuffer; +//# sourceMappingURL=index.js.map \ No newline at end of file diff --git a/node_modules/data-uri-to-buffer/dist/index.js.map b/node_modules/data-uri-to-buffer/dist/index.js.map new file mode 100644 index 00000000..696504a3 --- /dev/null +++ b/node_modules/data-uri-to-buffer/dist/index.js.map @@ -0,0 +1 @@ +{"version":3,"file":"index.js","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":"AAMA;;;;;;GAMG;AACH,MAAM,UAAU,eAAe,CAAC,GAAW;IAC1C,IAAI,CAAC,SAAS,CAAC,IAAI,CAAC,GAAG,CAAC,EAAE;QACzB,MAAM,IAAI,SAAS,CAClB,kEAAkE,CAClE,CAAC;KACF;IAED,iBAAiB;IACjB,GAAG,GAAG,GAAG,CAAC,OAAO,CAAC,QAAQ,EAAE,EAAE,CAAC,CAAC;IAEhC,+DAA+D;IAC/D,MAAM,UAAU,GAAG,GAAG,CAAC,OAAO,CAAC,GAAG,CAAC,CAAC;IACpC,IAAI,UAAU,KAAK,CAAC,CAAC,IAAI,UAAU,IAAI,CAAC,EAAE;QACzC,MAAM,IAAI,SAAS,CAAC,qBAAqB,CAAC,CAAC;KAC3C;IAED,mDAAmD;IACnD,MAAM,IAAI,GAAG,GAAG,CAAC,SAAS,CAAC,CAAC,EAAE,UAAU,CAAC,CAAC,KAAK,CAAC,GAAG,CAAC,CAAC;IAErD,IAAI,OAAO,GAAG,EAAE,CAAC;IACjB,IAAI,MAAM,GAAG,KAAK,CAAC;IACnB,MAAM,IAAI,GAAG,IAAI,CAAC,CAAC,CAAC,IAAI,YAAY,CAAC;IACrC,IAAI,QAAQ,GAAG,IAAI,CAAC;IACpB,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,IAAI,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE;QACrC,IAAI,IAAI,CAAC,CAAC,CAAC,KAAK,QAAQ,EAAE;YACzB,MAAM,GAAG,IAAI,CAAC;SACd;aAAM,IAAG,IAAI,CAAC,CAAC,CAAC,EAAE;YAClB,QAAQ,IAAI,IAAM,IAAI,CAAC,CAAC,CAAC,EAAE,CAAC;YAC5B,IAAI,IAAI,CAAC,CAAC,CAAC,CAAC,OAAO,CAAC,UAAU,CAAC,KAAK,CAAC,EAAE;gBACtC,OAAO,GAAG,IAAI,CAAC,CAAC,CAAC,CAAC,SAAS,CAAC,CAAC,CAAC,CAAC;aAC/B;SACD;KACD;IACD,oDAAoD;IACpD,IAAI,CAAC,IAAI,CAAC,CAAC,CAAC,IAAI,CAAC,OAAO,CAAC,MAAM,EAAE;QAChC,QAAQ,IAAI,mBAAmB,CAAC;QAChC,OAAO,GAAG,UAAU,CAAC;KACrB;IAED,4DAA4D;IAC5D,MAAM,QAAQ,GAAG,MAAM,CAAC,CAAC,CAAC,QAAQ,CAAC,CAAC,CAAC,OAAO,CAAC;IAC7C,MAAM,IAAI,GAAG,QAAQ,CAAC,GAAG,CAAC,SAAS,CAAC,UAAU,GAAG,CAAC,CAAC,CAAC,CAAC;IACrD,MAAM,MAAM,GAAG,MAAM,CAAC,IAAI,CAAC,IAAI,EAAE,QAAQ,CAAe,CAAC;IAEzD,sDAAsD;IACtD,MAAM,CAAC,IAAI,GAAG,IAAI,CAAC;IACnB,MAAM,CAAC,QAAQ,GAAG,QAAQ,CAAC;IAE3B,8BAA8B;IAC9B,MAAM,CAAC,OAAO,GAAG,OAAO,CAAC;IAEzB,OAAO,MAAM,CAAC;AACf,CAAC;AAED,eAAe,eAAe,CAAC"} \ No newline at end of file diff --git a/node_modules/data-uri-to-buffer/package.json b/node_modules/data-uri-to-buffer/package.json new file mode 100644 index 00000000..9e427132 --- /dev/null +++ b/node_modules/data-uri-to-buffer/package.json @@ -0,0 +1,62 @@ +{ + "name": "data-uri-to-buffer", + "version": "4.0.1", + "description": "Generate a Buffer instance from a Data URI string", + "type": "module", + "exports": "./dist/index.js", + "main": "./dist/index.js", + "types": "./dist/index.d.ts", + "files": [ + "dist", + "src" + ], + "scripts": { + "build": "tsc", + "test": "jest", + "prepublishOnly": "npm run build" + }, + "repository": { + "type": "git", + "url": "git://github.com/TooTallNate/node-data-uri-to-buffer.git" + }, + "engines": { + "node": ">= 12" + }, + "keywords": [ + "data", + "uri", + "datauri", + "data-uri", + "buffer", + "convert", + "rfc2397", + "2397" + ], + "author": "Nathan Rajlich (http://n8.io/)", + "license": "MIT", + "bugs": { + "url": "https://github.com/TooTallNate/node-data-uri-to-buffer/issues" + }, + "homepage": "https://github.com/TooTallNate/node-data-uri-to-buffer", + "devDependencies": { + "@types/jest": "^27.0.2", + "@types/node": "^12.20.36", + "jest": "^27.3.1", + "ts-jest": "^27.0.7", + "typescript": "^4.4.4" + }, + "jest": { + "preset": "ts-jest", + "globals": { + "ts-jest": { + "diagnostics": false, + "isolatedModules": true + } + }, + "verbose": false, + "testEnvironment": "node", + "testMatch": [ + "/test/**/*.test.ts" + ] + } +} diff --git a/node_modules/data-uri-to-buffer/src/index.ts b/node_modules/data-uri-to-buffer/src/index.ts new file mode 100644 index 00000000..9e5749f8 --- /dev/null +++ b/node_modules/data-uri-to-buffer/src/index.ts @@ -0,0 +1,68 @@ +export interface MimeBuffer extends Buffer { + type: string; + typeFull: string; + charset: string; +} + +/** + * Returns a `Buffer` instance from the given data URI `uri`. + * + * @param {String} uri Data URI to turn into a Buffer instance + * @returns {Buffer} Buffer instance from Data URI + * @api public + */ +export function dataUriToBuffer(uri: string): MimeBuffer { + if (!/^data:/i.test(uri)) { + throw new TypeError( + '`uri` does not appear to be a Data URI (must begin with "data:")' + ); + } + + // strip newlines + uri = uri.replace(/\r?\n/g, ''); + + // split the URI up into the "metadata" and the "data" portions + const firstComma = uri.indexOf(','); + if (firstComma === -1 || firstComma <= 4) { + throw new TypeError('malformed data: URI'); + } + + // remove the "data:" scheme and parse the metadata + const meta = uri.substring(5, firstComma).split(';'); + + let charset = ''; + let base64 = false; + const type = meta[0] || 'text/plain'; + let typeFull = type; + for (let i = 1; i < meta.length; i++) { + if (meta[i] === 'base64') { + base64 = true; + } else if(meta[i]) { + typeFull += `;${ meta[i]}`; + if (meta[i].indexOf('charset=') === 0) { + charset = meta[i].substring(8); + } + } + } + // defaults to US-ASCII only if type is not provided + if (!meta[0] && !charset.length) { + typeFull += ';charset=US-ASCII'; + charset = 'US-ASCII'; + } + + // get the encoded data portion and decode URI-encoded chars + const encoding = base64 ? 'base64' : 'ascii'; + const data = unescape(uri.substring(firstComma + 1)); + const buffer = Buffer.from(data, encoding) as MimeBuffer; + + // set `.type` and `.typeFull` properties to MIME type + buffer.type = type; + buffer.typeFull = typeFull; + + // set the `.charset` property + buffer.charset = charset; + + return buffer; +} + +export default dataUriToBuffer; diff --git a/node_modules/fast-xml-parser/CHANGELOG.md b/node_modules/fast-xml-parser/CHANGELOG.md new file mode 100644 index 00000000..017e5d93 --- /dev/null +++ b/node_modules/fast-xml-parser/CHANGELOG.md @@ -0,0 +1,606 @@ +Note: If you find missing information about particular minor version, that version must have been changed without any functional change in this library. + +**4.5.2 / 2025-02-18** +- Fix null CDATA to comply with undefined behavior (#701) (By [Matthieu BOHEAS](https://github.com/Kelgors)) +- Fix(performance): Update check for leaf node in saveTextToParentTag function in OrderedObjParser.js (#707) (By [...](https://github.com/tomingtoming)) +- Fix: emit full JSON string from CLI when no output filename specified (#710) (By [Matt Benson](https://github.com/mbenson)) + +**4.5.1 / 2024-12-15** +- Fix empty tag key name for v5 (#697). no impact on v4 +- Fixes entity parsing when used in strict mode (#699) + +**4.5.0 / 2024-09-03** +- feat #666: ignoreAttributes support function, and array of string or regex (By [ArtemM](https://github.com/mav-rik)) + +**4.4.1 / 2024-07-28** +- v5 fix: maximum length limit to currency value +- fix #634: build attributes with oneListGroup and attributesGroupName (#653)(By [Andreas Naziris](https://github.com/a-rasin)) +- fix: get oneListGroup to work as expected for array of strings (#662)(By [Andreas Naziris](https://github.com/a-rasin)) + +**4.4.0 / 2024-05-18** +- fix #654: parse attribute list correctly for self closing stop node. +- fix: validator bug when closing tag is not opened. (#647) (By [Ryosuke Fukatani](https://github.com/RyosukeFukatani)) +- fix #581: typings; return type of `tagValueProcessor` & `attributeValueProcessor` (#582) (By [monholm]()) + +**4.3.6 / 2024-03-16** +- Add support for parsing HTML numeric entities (#645) (By [Jonas Schade ](https://github.com/DerZade)) + +**4.3.5 / 2024-02-24** +- code for v5 is added for experimental use + +**4.3.4 / 2024-01-10** +- fix: Don't escape entities in CDATA sections (#633) (By [wackbyte](https://github.com/wackbyte)) + +**4.3.3 / 2024-01-10** +- Remove unnecessary regex + +**4.3.2 / 2023-10-02** +- fix `jObj.hasOwnProperty` when give input is null (By [Arda TANRIKULU](https://github.com/ardatan)) + +**4.3.1 / 2023-09-24** +- revert back "Fix typings for builder and parser to make return type generic" to avoid failure of existing projects. Need to decide a common approach. + +**4.3.0 / 2023-09-20** +- Fix stopNodes to work with removeNSPrefix (#607) (#608) (By [Craig Andrews]https://github.com/candrews)) +- Fix #610 ignore properties set to Object.prototype +- Fix typings for builder and parser to make return type generic (By [Sarah Dayan](https://github.com/sarahdayan)) + +**4.2.7 / 2023-07-30** +- Fix: builder should set text node correctly when only textnode is present (#589) (By [qianqing](https://github.com/joneqian)) +- Fix: Fix for null and undefined attributes when building xml (#585) (#598). A null or undefined value should be ignored. (By [Eugenio Ceschia](https://github.com/cecia234)) + +**4.2.6 / 2023-07-17** +- Fix: Remove trailing slash from jPath for self-closing tags (#595) (By [Maciej Radzikowski](https://github.com/m-radzikowski)) + +**4.2.5 / 2023-06-22** +- change code implementation + +**4.2.4 / 2023-06-06** +- fix security bug + +**4.2.3 / 2023-06-05** +- fix security bug + +**4.2.2 / 2023-04-18** +- fix #562: fix unpaired tag when it comes in last of a nested tag. Also throw error when unpaired tag is used as closing tag + +**4.2.1 / 2023-04-18** +- fix: jpath after unpaired tags + +**4.2.0 / 2023-04-09** +- support `updateTag` parser property + +**4.1.4 / 2023-04-08** +- update typings to let user create XMLBuilder instance without options (#556) (By [Patrick](https://github.com/omggga)) +- fix: IsArray option isn't parsing tags with 0 as value correctly #490 (#557) (By [Aleksandr Murashkin](https://github.com/p-kuen)) +- feature: support `oneListGroup` to group repeated children tags udder single group + +**4.1.3 / 2023-02-26** +- fix #546: Support complex entity value + +**4.1.2 / 2023-02-12** +- Security Fix + +**4.1.1 / 2023-02-03** +- Fix #540: ignoreAttributes breaks unpairedTags +- Refactor XML builder code + +**4.1.0 / 2023-02-02** +- Fix '<' or '>' in DTD comment throwing an error. (#533) (By [Adam Baker](https://github.com/Cwazywierdo)) +- Set "eNotation" to 'true' as default + +**4.0.15 / 2023-01-25** +- make "eNotation" optional + +**4.0.14 / 2023-01-22** +- fixed: add missed typing "eNotation" to parse values + +**4.0.13 / 2023-01-07** +- preserveorder formatting (By [mdeknowis](https://github.com/mdeknowis)) +- support `transformAttributeName` (By [Erik Rothoff Andersson](https://github.com/erkie)) + +**4.0.12 / 2022-11-19** +- fix typescript + +**4.0.11 / 2022-10-05** +- fix #501: parse for entities only once + +**4.0.10 / 2022-09-14** +- fix broken links in demo site (By [Yannick Lang](https://github.com/layaxx)) +- fix #491: tagValueProcessor type definition (By [Andrea Francesco Speziale](https://github.com/andreafspeziale)) +- Add jsdocs for tagValueProcessor + + +**4.0.9 / 2022-07-10** +- fix #470: stop-tag can have self-closing tag with same name +- fix #472: stopNode can have any special tag inside +- Allow !ATTLIST and !NOTATION with DOCTYPE +- Add transformTagName option to transform tag names when parsing (#469) (By [Erik Rothoff Andersson](https://github.com/erkie)) + +**4.0.8 / 2022-05-28** +- Fix CDATA parsing returning empty string when value = 0 (#451) (By [ndelanou](https://github.com/ndelanou)) +- Fix stopNodes when same tag appears inside node (#456) (By [patrickshipe](https://github.com/patrickshipe)) +- fix #468: prettify own properties only + +**4.0.7 / 2022-03-18** +- support CDATA even if tag order is not preserved +- support Comments even if tag order is not preserved +- fix #446: XMLbuilder should not indent XML declaration + +**4.0.6 / 2022-03-08** +- fix: call tagValueProcessor only once for array items +- fix: missing changed for #437 + +**4.0.5 / 2022-03-06** +- fix #437: call tagValueProcessor from XML builder + +**4.0.4 / 2022-03-03** +- fix #435: should skip unpaired and self-closing nodes when set as stopnodes + +**4.0.3 / 2022-02-15** +- fix: ReferenceError when Bundled with Strict (#431) (By [Andreas Heissenberger](https://github.com/aheissenberger)) + + +**4.0.2 / 2022-02-04** +- builder supports `suppressUnpairedNode` +- parser supports `ignoreDeclaration` and `ignorePiTags` +- fix: when comment is parsed as text value if given as ` ...` #423 +- builder supports decoding `&` + +**4.0.1 / 2022-01-08** +- fix builder for pi tag +- fix: support suppressBooleanAttrs by builder + +**4.0.0 / 2022-01-06** +- Generating different combined, parser only, builder only, validator only browser bundles +- Keeping cjs modules as they can be imported in cjs and esm modules both. Otherwise refer `esm` branch. + +**4.0.0-beta.8 / 2021-12-13** +- call tagValueProcessor for stop nodes + +**4.0.0-beta.7 / 2021-12-09** +- fix Validator bug when an attribute has no value but '=' only +- XML Builder should suppress unpaired tags by default. +- documents update for missing features +- refactoring to use Object.assign +- refactoring to remove repeated code + +**4.0.0-beta.6 / 2021-12-05** +- Support PI Tags processing +- Support `suppressBooleanAttributes` by XML Builder for attributes with value `true`. + +**4.0.0-beta.5 / 2021-12-04** +- fix: when a tag with name "attributes" + +**4.0.0-beta.4 / 2021-12-02** +- Support HTML document parsing +- skip stop nodes parsing when building the XML from JS object +- Support external entites without DOCTYPE +- update dev dependency: strnum v1.0.5 to fix long number issue + +**4.0.0-beta.3 / 2021-11-30** +- support global stopNodes expression like "*.stop" +- support self-closing and paired unpaired tags +- fix: CDATA should not be parsed. +- Fix typings for XMLBuilder (#396)(By [Anders Emil Salvesen](https://github.com/andersem)) +- supports XML entities, HTML entities, DOCTYPE entities + +**⚠️ 4.0.0-beta.2 / 2021-11-19** +- rename `attrMap` to `attibutes` in parser output when `preserveOrder:true` +- supports unpairedTags + +**⚠️ 4.0.0-beta.1 / 2021-11-18** +- Parser returns an array now + - to make the structure common + - and to return root level detail +- renamed `cdataTagName` to `cdataPropName` +- Added `commentPropName` +- fix typings + +**⚠️ 4.0.0-beta.0 / 2021-11-16** +- Name change of many configuration properties. + - `attrNodeName` to `attributesGroupName` + - `attrValueProcessor` to `attributeValueProcessor` + - `parseNodeValue` to `parseTagValue` + - `ignoreNameSpace` to `removeNSPrefix` + - `numParseOptions` to `numberParseOptions` + - spelling correction for `suppressEmptyNode` +- Name change of cli and browser bundle to **fxparser** +- `isArray` option is added to parse a tag into array +- `preserveOrder` option is added to render XML in such a way that the result js Object maintains the order of properties same as in XML. +- Processing behaviour of `tagValueProcessor` and `attributeValueProcessor` are changes with extra input parameters +- j2xparser is renamed to XMLBuilder. +- You need to build XML parser instance for given options first before parsing XML. +- fix #327, #336: throw error when extra text after XML content +- fix #330: attribute value can have '\n', +- fix #350: attrbiutes can be separated by '\n' from tagname + +3.21.1 / 2021-10-31 +- Correctly format JSON elements with a text prop but no attribute props ( By [haddadnj](https://github.com/haddadnj) ) + +3.21.0 / 2021-10-25 + - feat: added option `rootNodeName` to set tag name for array input when converting js object to XML. + - feat: added option `alwaysCreateTextNode` to force text node creation (by: *@massimo-ua*) + - ⚠️ feat: Better error location for unclosed tags. (by *@Gei0r*) + - Some error messages would be changed when validating XML. Eg + - `{ InvalidXml: "Invalid '[ \"rootNode\"]' found." }` → `{InvalidTag: "Unclosed tag 'rootNode'."}` + - `{ InvalidTag: "Closing tag 'rootNode' is expected inplace of 'rootnode'." }` → `{ InvalidTag: "Expected closing tag 'rootNode' (opened in line 1) instead of closing tag 'rootnode'."}` + - ⚠️ feat: Column in error response when validating XML +```js +{ + "code": "InvalidAttr", + "msg": "Attribute 'abc' is repeated.", + "line": 1, + "col": 22 +} +``` + +3.20.1 / 2021-09-25 + - update strnum package + +3.20.0 / 2021-09-10 + - Use strnum npm package to parse string to number + - breaking change: long number will be parsed to scientific notation. + +3.19.0 / 2021-03-14 + - License changed to MIT original + - Fix #321 : namespace tag parsing + +3.18.0 / 2021-02-05 + - Support RegEx and function in arrayMode option + - Fix #317 : validate nested PI tags + +3.17.4 / 2020-06-07 + - Refactor some code to support IE11 + - Fix: `` space as attribute string + +3.17.3 / 2020-05-23 + - Fix: tag name separated by \n \t + - Fix: throw error for unclosed tags + +3.17.2 / 2020-05-23 + - Fixed an issue in processing doctype tag + - Fixed tagName where it should not have whitespace chars + +3.17.1 / 2020-05-19 + - Fixed an issue in checking opening tag + +3.17.0 / 2020-05-18 + - parser: fix '<' issue when it comes in aatr value + - parser: refactoring to remove dependency from regex + - validator: fix IE 11 issue for error messages + - updated dev dependencies + - separated benchmark module to sub-module + - breaking change: comments will not be removed from CDATA data + +3.16.0 / 2020-01-12 + - validaor: fix for ampersand characters (#215) + - refactoring to support unicode chars in tag name + - update typing for validator error + +3.15.1 / 2019-12-09 + - validaor: fix multiple roots are not allowed + +3.15.0 / 2019-11-23 + - validaor: improve error messaging + - validator: add line number in case of error + - validator: add more error scenarios to make it more descriptive + +3.14.0 / 2019-10-25 + - arrayMode for XML to JS obj parsing + +3.13.0 / 2019-10-02 + - pass tag/attr name to tag/attr value processor + - inbuilt optional validation with XML parser + +3.12.21 / 2019-10-02 + - Fix validator for unclosed XMLs + - move nimnjs dependency to dev dependency + - update dependencies + +3.12.20 / 2019-08-16 + - Revert: Fix #167: '>' in attribute value as it is causing high performance degrade. + +3.12.19 / 2019-07-28 + - Fix js to xml parser should work for date values. (broken: `tagValueProcessor` will receive the original value instead of string always) (breaking change) + +3.12.18 / 2019-07-27 + - remove configstore dependency + +3.12.17 / 2019-07-14 + - Fix #167: '>' in attribute value + +3.12.16 / 2019-03-23 + - Support a new option "stopNodes". (#150) +Accept the list of tags which are not required to be parsed. Instead, all the nested tag and data will be assigned as string. + - Don't show post-install message + +3.12.12 / 2019-01-11 + - fix : IE parseInt, parseFloat error + +3.12.11 / 2018-12-24 + - fix #132: "/" should not be parsed as boolean attr in case of self closing tags + +3.12.9 / 2018-11-23 + - fix #129 : validator should not fail when an atrribute name is 'length' + +3.12.8 / 2018-11-22 + - fix #128 : use 'attrValueProcessor' to process attribute value in json2xml parser + +3.12.6 / 2018-11-10 + - Fix #126: check for type + +3.12.4 / 2018-09-12 + - Fix: include tasks in npm package + +3.12.3 / 2018-09-12 + - Fix CLI issue raised in last PR + +3.12.2 / 2018-09-11 + - Fix formatting for JSON to XML output + - Migrate to webpack (PR merged) + - fix cli (PR merged) + +3.12.0 / 2018-08-06 + - Support hexadecimal values + - Support true number parsing + +3.11.2 / 2018-07-23 + - Update Demo for more options + - Update license information + - Update readme for formatting, users, and spelling mistakes + - Add missing typescript definition for j2xParser + - refactoring: change filenames + +3.11.1 / 2018-06-05 + - fix #93: read the text after self closing tag + +3.11.0 / 2018-05-20 + - return defaultOptions if there are not options in buildOptions function + - added localeRange declaration in parser.d.ts + - Added support of cyrillic characters in validator XML + - fixed bug in validator work when XML data with byte order marker + +3.10.0 / 2018-05-13 + - Added support of cyrillic characters in parsing XML to JSON + +3.9.11 / 2018-05-09 + - fix https://github.com/NaturalIntelligence/fast-xml-parser/issues/80 fix nimn chars + - update package information + - fix https://github.com/NaturalIntelligence/fast-xml-parser/issues/86: json 2 xml parser : property with null value should be parsed to self closing tag. + - update online demo + - revert zombiejs to old version to support old version of node + - update dependencies + +3.3.10 / 2018-04-23 + - fix #77 : parse even if closing tag has space before '>' + - include all css & js lib in demo app + - remove babel dependencies until needed + +3.3.9 / 2018-04-18 + - fix #74 : TS2314 TypeScript compiler error + +3.3.8 / 2018-04-17 + - fix #73 : IE doesn't support Object.assign + +3.3.7 / 2018-04-14 + - fix: use let insted of const in for loop of validator + - Merge pull request + https://github.com/NaturalIntelligence/fast-xml-parser/issues/71 from bb/master + first draft of typings for typescript + https://github.com/NaturalIntelligence/fast-xml-parser/issues/69 + - Merge pull request + https://github.com/NaturalIntelligence/fast-xml-parser/issues/70 from bb/patch-1 + fix some typos in readme + +3.3.6 / 2018-03-21 + - change arrow functions to full notation for IE compatibility + +3.3.5 / 2018-03-15 + - fix https://github.com/NaturalIntelligence/fast-xml-parser/issues/67 : attrNodeName invalid behavior + - fix: remove decodeHTML char condition + +3.3.4 / 2018-03-14 + - remove dependency on "he" package + - refactor code to separate methods in separate files. + - draft code for transforming XML to json string. It is not officially documented due to performance issue. + +3.3.0 / 2018-03-05 + - use common default options for XML parsing for consistency. And add `parseToNimn` method. + - update nexttodo + - update README about XML to Nimn transformation and remove special notes about 3.x release + - update CONTRIBUTING.ms mentioning nexttodo + - add negative case for XML PIs + - validate xml processing instruction tags https://github.com/NaturalIntelligence/fast-xml-parser/issues/62 + - nimndata: handle array with object + - nimndata: node with nested node and text node + - nimndata: handle attributes and text node + - nimndata: add options, handle array + - add xml to nimn data converter + - x2j: direct access property with tagname + - update changelog + - fix validator when single quote presents in value enclosed with double quotes or vice versa + - Revert "remove unneded nimnjs dependency, move opencollective to devDependencies and replace it + with more light opencollective-postinstall" + This reverts commit d47aa7181075d82db4fee97fd8ea32b056fe3f46. + - Merge pull request: https://github.com/NaturalIntelligence/fast-xml-parser/issues/63 from HaroldPutman/suppress-undefined + Keep undefined nodes out of the XML output : This is useful when you are deleting nodes from the JSON and rewriting XML. + +3.2.4 / 2018-03-01 + - fix #59 fix in validator when open quote presents in attribute value + - Create nexttodo.md + - exclude static from bitHound tests + - add package lock + +3.2.3 / 2018-02-28 + - Merge pull request from Delagen/master: fix namespaces can contain the same characters as xml names + +3.2.2 / 2018-02-22 + - fix: attribute xmlns should not be removed if ignoreNameSpace is false + - create CONTRIBUTING.md + +3.2.1 / 2018-02-17 + - fix: empty attribute should be parsed + +3.2.0 / 2018-02-16 + - Merge pull request : Dev to Master + - Update README and version + - j2x:add performance test + - j2x: Remove extra empty line before closing tag + - j2x: suppress empty nodes to self closing node if configured + - j2x: provide option to give indentation depth + - j2x: make optional formatting + - j2x: encodeHTMLchat + - j2x: handle cdata tag + - j2x: handle grouped attributes + - convert json to xml + - nested object + - array + - attributes + - text value + - small refactoring + - Merge pull request: Update cli.js to let user validate XML file or data + - Add option for rendering CDATA as separate property + +3.0.1 / 2018-02-09 + - fix CRLF: replace it with single space in attributes value only. + +3.0.0 / 2018-02-08 + - change online tool with new changes + - update info about new options + - separate tag value processing to separate function + - make HTML decoding optional + - give an option to allow boolean attributes + - change cli options as per v3 + - Correct comparison table format on README + - update v3 information + - some performance improvement changes + - Make regex object local to the method and move some common methods to util + - Change parser to + - handle multiple instances of CDATA + - make triming of value optionals + - HTML decode attribute and text value + - refactor code to separate files + - Ignore newline chars without RE (in validator) + - validate for XML prolog + - Validate DOCTYPE without RE + - Update validator to return error response + - Update README to add detail about V3 + - Separate xmlNode model class + - include vscode debug config + - fix for repeated object + - fix attribute regex for boolean attributes + - Fix validator for invalid attributes +2.9.4 / 2018-02-02 + - Merge pull request: Decode HTML characters + - refactor source folder name + - ignore bundle / browser js to be published to npm +2.9.3 / 2018-01-26 + - Merge pull request: Correctly remove CRLF line breaks + - Enable to parse attribute in online editor + - Fix testing demo app test + - Describe parsing options + - Add options for online demo +2.9.2 / 2018-01-18 + - Remove check if tag starting with "XML" + - Fix: when there are spaces before / after CDATA + +2.9.1 / 2018-01-16 + - Fix: newline should be replaced with single space + - Fix: for single and multiline comments + - validate xml with CDATA + - Fix: the issue when there is no space between 2 attributes + - Fix: https://github.com/NaturalIntelligence/fast-xml-parser/issues/33: when there is newline char in attr val, it doesn't parse + - Merge pull request: fix ignoreNamespace + - fix: don't wrap attributes if only namespace attrs + - fix: use portfinder for run tests, update deps + - fix: don't treat namespaces as attributes when ignoreNamespace enabled + +2.9.0 / 2018-01-10 + - Rewrite the validator to handle large files. + Ignore DOCTYPE validation. + - Fix: When attribute value has equal sign + +2.8.3 / 2017-12-15 + - Fix: when a tag has value along with subtags + +2.8.2 / 2017-12-04 + - Fix value parsing for IE + +2.8.1 / 2017-12-01 + - fix: validator should return false instead of err when invalid XML + +2.8.0 / 2017-11-29 + - Add CLI option to ignore value conversion + - Fix variable name when filename is given on CLI + - Update CLI help text + - Merge pull request: xml2js: Accept standard input + - Test Node 8 + - Update dependencies + - Bundle readToEnd + - Add ability to read from standard input + +2.7.4 / 2017-09-22 + - Merge pull request: Allow wrap attributes with subobject to compatible with other parsers output + +2.7.3 / 2017-08-02 + - fix: handle CDATA with regx + +2.7.2 / 2017-07-30 + - Change travis config for yarn caching + - fix validator: when tag property is same as array property + - Merge pull request: Failing test case in validator for valid SVG + +2.7.1 / 2017-07-26 + - Fix: Handle val 0 + +2.7.0 / 2017-07-25 + - Fix test for arrayMode + - Merge pull request: Add arrayMode option to parse any nodes as arrays + +2.6.0 / 2017-07-14 + - code improvement + - Add unit tests for value conversion for attr + - Merge pull request: option of an attribute value conversion to a number (textAttrConversion) the same way as the textNodeConversion option does. Default value is false. + +2.5.1 / 2017-07-01 + - Fix XML element name pattern + - Fix XML element name pattern while parsing + - Fix validation for xml tag element + +2.5.0 / 2017-06-25 + - Improve Validator performance + - update attr matching regex + - Add perf tests + - Improve atrr regex to handle all cases + +2.4.4 / 2017-06-08 + - Bug fix: when an attribute has single or double quote in value + +2.4.3 / 2017-06-05 + - Bug fix: when multiple CDATA tags are given + - Merge pull request: add option "textNodeConversion" + - add option "textNodeConversion" + +2.4.1 / 2017-04-14 + - fix tests + - Bug fix: preserve initial space of node value + - Handle CDATA + +2.3.1 / 2017-03-15 + - Bug fix: when single self closing tag + - Merge pull request: fix .codeclimate.yml + - Update .codeclimate.yml - Fixed config so it does not error anymore. + - Update .codeclimate.yml + +2.3.0 / 2017-02-26 + - Code improvement + - add bithound config + - Update usage + - Update travis to generate bundle js before running tests + - 1.Browserify, 2. add more tests for validator + - Add validator + - Fix CLI default parameter bug + +2.2.1 / 2017-02-05 + - Bug fix: CLI default option diff --git a/node_modules/fast-xml-parser/LICENSE b/node_modules/fast-xml-parser/LICENSE new file mode 100644 index 00000000..d7da622a --- /dev/null +++ b/node_modules/fast-xml-parser/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2017 Amit Kumar Gupta + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/node_modules/fast-xml-parser/README.md b/node_modules/fast-xml-parser/README.md new file mode 100644 index 00000000..22f2ddff --- /dev/null +++ b/node_modules/fast-xml-parser/README.md @@ -0,0 +1,237 @@ +# [fast-xml-parser](https://www.npmjs.com/package/fast-xml-parser) +[![NPM quality][quality-image]][quality-url] +[![Coverage Status](https://coveralls.io/repos/github/NaturalIntelligence/fast-xml-parser/badge.svg?branch=master)](https://coveralls.io/github/NaturalIntelligence/fast-xml-parser?branch=master) +[Try me](https://naturalintelligence.github.io/fast-xml-parser/) +[![NPM total downloads](https://img.shields.io/npm/dt/fast-xml-parser.svg)](https://npm.im/fast-xml-parser) + + +Validate XML, Parse XML to JS Object, or Build XML from JS Object without C/C++ based libraries and no callback. + +--- + +Checkout our new library [Text2Chart](https://solothought.com/text2chart/flow) that constructs flow chart out of simple text. Very helpful in creating or alayzing an algorithm, and documentation purpose +
+ +Sponsor this project + + + + + + + + donate button +
+
+
+ + + +![fxp_sponsors](https://raw.githubusercontent.com/NaturalIntelligence/ThankYouBackers/main/assets/NI_sponsors.jpg) +- Hiroki Kokubun + +> This is a donation. No goods or services are expected in return. Any requests for refunds for those purposes will be rejected. +## Users + + + + + + + + + + + + + + + + + + + +[more](./USERs.md) + +The list of users are mostly published by Github or communicated directly. Feel free to contact if you find any information wrong. + +--- + +## Main Features + +FXP logo + +* Validate XML data syntactically +* Parse XML to JS Object +* Build XML from JS Object +* Compatible to node js packages, in browser, and in CLI (click try me button above for demo) +* Faster than any other pure JS implementation. +* It can handle big files (tested up to 100mb). +* Controlled parsing using various options +* XML Entities, HTML entities, and DOCTYPE entites are supported. +* unpaired tags (Eg `
` in HTML), stop nodes (Eg ` +: + +``` + +Bundle size + +| Bundle Name | Size | +| ------------------ | ---- | +| fxbuilder.min.js | 6.5K | +| fxparser.min.js | 20K | +| fxp.min.js | 26K | +| fxvalidator.min.js | 5.7K | + +### Documents + + + + + + + +
v3v4v5
+ documents +
    +
  1. Getting Started
    2. +
  2. XML Parser
    3. +
  3. XML Builder
    4. +
  4. XML Validator
    5. +
  5. Entities
    6. +
  6. HTML Document Parsing
    7. +
  7. PI Tag processing
    8. +
    +
  1. Getting Started +
  2. Features
    3. +
  3. Options
    4. +
  4. Output Builders
    5. +
  5. Value Parsers
    6. +
+ +**note**: version 5 is released with version 4 tfor experimental use. Based on it's demand, it'll be developed and the features can be different in final release. + +## Performance +negative means error + +### XML Parser + + + + +* Y-axis: requests per second +* X-axis: File size + +### XML Builder + + +* Y-axis: requests per second + + + + + + +## Usage Trend + +[Usage Trend of fast-xml-parser](https://npm-compare.com/fast-xml-parser#timeRange=THREE_YEARS) + + + NPM Usage Trend of fast-xml-parser + + +## Supporters +### Contributors + +This project exists thanks to [all](graphs/contributors) the people who contribute. [[Contribute](docs/CONTRIBUTING.md)]. + + + + +### Backers + +Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com/fast-xml-parser#backer)] + + + + + +# License +* MIT License + +![Donate $5](static/img/donation_quote.png) diff --git a/node_modules/fast-xml-parser/package.json b/node_modules/fast-xml-parser/package.json new file mode 100644 index 00000000..285ff121 --- /dev/null +++ b/node_modules/fast-xml-parser/package.json @@ -0,0 +1,72 @@ +{ + "name": "fast-xml-parser", + "version": "4.5.3", + "description": "Validate XML, Parse XML, Build XML without C/C++ based libraries", + "main": "./src/fxp.js", + "scripts": { + "test": "nyc --reporter=lcov --reporter=text jasmine spec/*spec.js", + "test-types": "tsc --noEmit spec/typings/typings-test.ts", + "unit": "jasmine", + "coverage": "nyc report --reporter html --reporter text -t .nyc_output --report-dir .nyc_output/summary", + "perf": "node ./benchmark/perfTest3.js", + "lint": "eslint src/*.js spec/*.js", + "bundle": "webpack --config webpack-prod.config.js", + "prettier": "prettier --write src/**/*.js", + "publish-please": "publish-please", + "checkReadiness": "publish-please --dry-run" + }, + "bin": { + "fxparser": "./src/cli/cli.js" + }, + "repository": { + "type": "git", + "url": "https://github.com/NaturalIntelligence/fast-xml-parser" + }, + "keywords": [ + "fast", + "xml", + "json", + "parser", + "xml2js", + "x2js", + "xml2json", + "js", + "cli", + "validator", + "validate", + "transformer", + "assert", + "js2xml", + "json2xml", + "html" + ], + "author": "Amit Gupta (https://solothought.com)", + "license": "MIT", + "devDependencies": { + "@babel/core": "^7.13.10", + "@babel/plugin-transform-runtime": "^7.13.10", + "@babel/preset-env": "^7.13.10", + "@babel/register": "^7.13.8", + "@types/node": "20", + "babel-loader": "^8.2.2", + "eslint": "^8.3.0", + "he": "^1.2.0", + "jasmine": "^3.6.4", + "nyc": "^15.1.0", + "prettier": "^1.19.1", + "publish-please": "^5.5.2", + "typescript": "5", + "webpack": "^5.64.4", + "webpack-cli": "^4.9.1" + }, + "typings": "src/fxp.d.ts", + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/NaturalIntelligence" + } + ], + "dependencies": { + "strnum": "^1.1.1" + } +} diff --git a/node_modules/fast-xml-parser/src/cli/cli.js b/node_modules/fast-xml-parser/src/cli/cli.js new file mode 100755 index 00000000..2bc0cd65 --- /dev/null +++ b/node_modules/fast-xml-parser/src/cli/cli.js @@ -0,0 +1,93 @@ +#!/usr/bin/env node +'use strict'; +/*eslint-disable no-console*/ +const fs = require('fs'); +const path = require('path'); +const {XMLParser, XMLValidator} = require("../fxp"); +const readToEnd = require('./read').readToEnd; + +const version = require('./../../package.json').version; +if (process.argv[2] === '--help' || process.argv[2] === '-h') { + console.log(require("./man")); +} else if (process.argv[2] === '--version') { + console.log(version); +} else { + const options = { + removeNSPrefix: true, + ignoreAttributes: false, + parseTagValue: true, + parseAttributeValue: true, + }; + let fileName = ''; + let outputFileName; + let validate = false; + let validateOnly = false; + for (let i = 2; i < process.argv.length; i++) { + if (process.argv[i] === '-ns') { + options.removeNSPrefix = false; + } else if (process.argv[i] === '-a') { + options.ignoreAttributes = true; + } else if (process.argv[i] === '-c') { + options.parseTagValue = false; + options.parseAttributeValue = false; + } else if (process.argv[i] === '-o') { + outputFileName = process.argv[++i]; + } else if (process.argv[i] === '-v') { + validate = true; + } else if (process.argv[i] === '-V') { + validateOnly = true; + } else { + //filename + fileName = process.argv[i]; + } + } + + const callback = function(xmlData) { + let output = ''; + if (validate) { + const parser = new XMLParser(options); + output = parser.parse(xmlData,validate); + } else if (validateOnly) { + output = XMLValidator.validate(xmlData); + process.exitCode = output === true ? 0 : 1; + } else { + const parser = new XMLParser(options); + output = JSON.stringify(parser.parse(xmlData,validate), null, 4); + } + if (outputFileName) { + writeToFile(outputFileName, output); + } else { + console.log(JSON.stringify(output, null, 2)); + } + }; + + try { + + if (!fileName) { + readToEnd(process.stdin, function(err, data) { + if (err) { + throw err; + } + callback(data.toString()); + }); + } else { + fs.readFile(fileName, function(err, data) { + if (err) { + throw err; + } + callback(data.toString()); + }); + } + } catch (e) { + console.log('Seems an invalid file or stream.' + e); + } +} + +function writeToFile(fileName, data) { + fs.writeFile(fileName, data, function(err) { + if (err) { + throw err; + } + console.log('JSON output has been written to ' + fileName); + }); +} diff --git a/node_modules/fast-xml-parser/src/cli/man.js b/node_modules/fast-xml-parser/src/cli/man.js new file mode 100644 index 00000000..89947cc7 --- /dev/null +++ b/node_modules/fast-xml-parser/src/cli/man.js @@ -0,0 +1,12 @@ +module.exports = `Fast XML Parser 4.0.0 +---------------- +$ fxparser [-ns|-a|-c|-v|-V] [-o outputfile.json] +$ cat xmlfile.xml | fxparser [-ns|-a|-c|-v|-V] [-o outputfile.json] + +Options +---------------- +-ns: remove namespace from tag and atrribute name. +-a: don't parse attributes. +-c: parse values to premitive type. +-v: validate before parsing. +-V: validate only.` \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/cli/read.js b/node_modules/fast-xml-parser/src/cli/read.js new file mode 100644 index 00000000..642da527 --- /dev/null +++ b/node_modules/fast-xml-parser/src/cli/read.js @@ -0,0 +1,92 @@ +'use strict'; + +// Copyright 2013 Timothy J Fontaine +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the 'Software'), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE + +/* + +Read any stream all the way to the end and trigger a single cb + +const http = require('http'); + +const rte = require('readtoend'); + +http.get('http://nodejs.org', function(response) { + rte.readToEnd(response, function(err, body) { + console.log(body); + }); +}); + +*/ + +let stream = require('stream'); +const util = require('util'); + +if (!stream.Transform) { + stream = require('readable-stream'); +} + +function ReadToEnd(opts) { + if (!(this instanceof ReadToEnd)) { + return new ReadToEnd(opts); + } + + stream.Transform.call(this, opts); + + this._rte_encoding = opts.encoding || 'utf8'; + + this._buff = ''; +} + +module.exports = ReadToEnd; +util.inherits(ReadToEnd, stream.Transform); + +ReadToEnd.prototype._transform = function(chunk, encoding, done) { + this._buff += chunk.toString(this._rte_encoding); + this.push(chunk); + done(); +}; + +ReadToEnd.prototype._flush = function(done) { + this.emit('complete', undefined, this._buff); + done(); +}; + +ReadToEnd.readToEnd = function(stream, options, cb) { + if (!cb) { + cb = options; + options = {}; + } + + const dest = new ReadToEnd(options); + + stream.pipe(dest); + + stream.on('error', function(err) { + stream.unpipe(dest); + cb(err); + }); + + dest.on('complete', cb); + + dest.resume(); + + return dest; +}; diff --git a/node_modules/fast-xml-parser/src/fxp.d.ts b/node_modules/fast-xml-parser/src/fxp.d.ts new file mode 100644 index 00000000..7a48b9db --- /dev/null +++ b/node_modules/fast-xml-parser/src/fxp.d.ts @@ -0,0 +1,418 @@ +type X2jOptions = { + /** + * Preserve the order of tags in resulting JS object + * + * Defaults to `false` + */ + preserveOrder?: boolean; + + /** + * Give a prefix to the attribute name in the resulting JS object + * + * Defaults to '@_' + */ + attributeNamePrefix?: string; + + /** + * A name to group all attributes of a tag under, or `false` to disable + * + * Defaults to `false` + */ + attributesGroupName?: false | string; + + /** + * The name of the next node in the resulting JS + * + * Defaults to `#text` + */ + textNodeName?: string; + + /** + * Whether to ignore attributes when parsing + * + * When `true` - ignores all the attributes + * + * When `false` - parses all the attributes + * + * When `Array` - filters out attributes that match provided patterns + * + * When `Function` - calls the function for each attribute and filters out those for which the function returned `true` + * + * Defaults to `true` + */ + ignoreAttributes?: boolean | (string | RegExp)[] | ((attrName: string, jPath: string) => boolean); + + /** + * Whether to remove namespace string from tag and attribute names + * + * Defaults to `false` + */ + removeNSPrefix?: boolean; + + /** + * Whether to allow attributes without value + * + * Defaults to `false` + */ + allowBooleanAttributes?: boolean; + + /** + * Whether to parse tag value with `strnum` package + * + * Defaults to `true` + */ + parseTagValue?: boolean; + + /** + * Whether to parse tag value with `strnum` package + * + * Defaults to `false` + */ + parseAttributeValue?: boolean; + + /** + * Whether to remove surrounding whitespace from tag or attribute value + * + * Defaults to `true` + */ + trimValues?: boolean; + + /** + * Give a property name to set CDATA values to instead of merging to tag's text value + * + * Defaults to `false` + */ + cdataPropName?: false | string; + + /** + * If set, parse comments and set as this property + * + * Defaults to `false` + */ + commentPropName?: false | string; + + /** + * Control how tag value should be parsed. Called only if tag value is not empty + * + * @returns {undefined|null} `undefined` or `null` to set original value. + * @returns {unknown} + * + * 1. Different value or value with different data type to set new value. + * 2. Same value to set parsed value if `parseTagValue: true`. + * + * Defaults to `(tagName, val, jPath, hasAttributes, isLeafNode) => val` + */ + tagValueProcessor?: (tagName: string, tagValue: string, jPath: string, hasAttributes: boolean, isLeafNode: boolean) => unknown; + + /** + * Control how attribute value should be parsed + * + * @param attrName + * @param attrValue + * @param jPath + * @returns {undefined|null} `undefined` or `null` to set original value + * @returns {unknown} + * + * Defaults to `(attrName, val, jPath) => val` + */ + attributeValueProcessor?: (attrName: string, attrValue: string, jPath: string) => unknown; + + /** + * Options to pass to `strnum` for parsing numbers + * + * Defaults to `{ hex: true, leadingZeros: true, eNotation: true }` + */ + numberParseOptions?: strnumOptions; + + /** + * Nodes to stop parsing at + * + * Defaults to `[]` + */ + stopNodes?: string[]; + + /** + * List of tags without closing tags + * + * Defaults to `[]` + */ + unpairedTags?: string[]; + + /** + * Whether to always create a text node + * + * Defaults to `false` + */ + alwaysCreateTextNode?: boolean; + + /** + * Determine whether a tag should be parsed as an array + * + * @param tagName + * @param jPath + * @param isLeafNode + * @param isAttribute + * @returns {boolean} + * + * Defaults to `() => false` + */ + isArray?: (tagName: string, jPath: string, isLeafNode: boolean, isAttribute: boolean) => boolean; + + /** + * Whether to process default and DOCTYPE entities + * + * Defaults to `true` + */ + processEntities?: boolean; + + /** + * Whether to process HTML entities + * + * Defaults to `false` + */ + htmlEntities?: boolean; + + /** + * Whether to ignore the declaration tag from output + * + * Defaults to `false` + */ + ignoreDeclaration?: boolean; + + /** + * Whether to ignore Pi tags + * + * Defaults to `false` + */ + ignorePiTags?: boolean; + + /** + * Transform tag names + * + * Defaults to `false` + */ + transformTagName?: ((tagName: string) => string) | false; + + /** + * Transform attribute names + * + * Defaults to `false` + */ + transformAttributeName?: ((attributeName: string) => string) | false; + + /** + * Change the tag name when a different name is returned. Skip the tag from parsed result when false is returned. + * Modify `attrs` object to control attributes for the given tag. + * + * @returns {string} new tag name. + * @returns false to skip the tag + * + * Defaults to `(tagName, jPath, attrs) => tagName` + */ + updateTag?: (tagName: string, jPath: string, attrs: {[k: string]: string}) => string | boolean; +}; + +type strnumOptions = { + hex: boolean; + leadingZeros: boolean, + skipLike?: RegExp, + eNotation?: boolean +} + +type validationOptions = { + /** + * Whether to allow attributes without value + * + * Defaults to `false` + */ + allowBooleanAttributes?: boolean; + + /** + * List of tags without closing tags + * + * Defaults to `[]` + */ + unpairedTags?: string[]; +}; + +type XmlBuilderOptions = { + /** + * Give a prefix to the attribute name in the resulting JS object + * + * Defaults to '@_' + */ + attributeNamePrefix?: string; + + /** + * A name to group all attributes of a tag under, or `false` to disable + * + * Defaults to `false` + */ + attributesGroupName?: false | string; + + /** + * The name of the next node in the resulting JS + * + * Defaults to `#text` + */ + textNodeName?: string; + + /** + * Whether to ignore attributes when building + * + * When `true` - ignores all the attributes + * + * When `false` - builds all the attributes + * + * When `Array` - filters out attributes that match provided patterns + * + * When `Function` - calls the function for each attribute and filters out those for which the function returned `true` + * + * Defaults to `true` + */ + ignoreAttributes?: boolean | (string | RegExp)[] | ((attrName: string, jPath: string) => boolean); + + /** + * Give a property name to set CDATA values to instead of merging to tag's text value + * + * Defaults to `false` + */ + cdataPropName?: false | string; + + /** + * If set, parse comments and set as this property + * + * Defaults to `false` + */ + commentPropName?: false | string; + + /** + * Whether to make output pretty instead of single line + * + * Defaults to `false` + */ + format?: boolean; + + + /** + * If `format` is set to `true`, sets the indent string + * + * Defaults to ` ` + */ + indentBy?: string; + + /** + * Give a name to a top-level array + * + * Defaults to `undefined` + */ + arrayNodeName?: string; + + /** + * Create empty tags for tags with no text value + * + * Defaults to `false` + */ + suppressEmptyNode?: boolean; + + /** + * Suppress an unpaired tag + * + * Defaults to `true` + */ + suppressUnpairedNode?: boolean; + + /** + * Don't put a value for boolean attributes + * + * Defaults to `true` + */ + suppressBooleanAttributes?: boolean; + + /** + * Preserve the order of tags in resulting JS object + * + * Defaults to `false` + */ + preserveOrder?: boolean; + + /** + * List of tags without closing tags + * + * Defaults to `[]` + */ + unpairedTags?: string[]; + + /** + * Nodes to stop parsing at + * + * Defaults to `[]` + */ + stopNodes?: string[]; + + /** + * Control how tag value should be parsed. Called only if tag value is not empty + * + * @returns {undefined|null} `undefined` or `null` to set original value. + * @returns {unknown} + * + * 1. Different value or value with different data type to set new value. + * 2. Same value to set parsed value if `parseTagValue: true`. + * + * Defaults to `(tagName, val, jPath, hasAttributes, isLeafNode) => val` + */ + tagValueProcessor?: (name: string, value: unknown) => unknown; + + /** + * Control how attribute value should be parsed + * + * @param attrName + * @param attrValue + * @param jPath + * @returns {undefined|null} `undefined` or `null` to set original value + * @returns {unknown} + * + * Defaults to `(attrName, val, jPath) => val` + */ + attributeValueProcessor?: (name: string, value: unknown) => unknown; + + /** + * Whether to process default and DOCTYPE entities + * + * Defaults to `true` + */ + processEntities?: boolean; + + + oneListGroup?: boolean; +}; + +type ESchema = string | object | Array; + +type ValidationError = { + err: { + code: string; + msg: string, + line: number, + col: number + }; +}; + +export class XMLParser { + constructor(options?: X2jOptions); + parse(xmlData: string | Buffer ,validationOptions?: validationOptions | boolean): any; + /** + * Add Entity which is not by default supported by this library + * @param entityIdentifier {string} Eg: 'ent' for &ent; + * @param entityValue {string} Eg: '\r' + */ + addEntity(entityIdentifier: string, entityValue: string): void; +} + +export class XMLValidator{ + static validate( xmlData: string, options?: validationOptions): true | ValidationError; +} +export class XMLBuilder { + constructor(options?: XmlBuilderOptions); + build(jObj: any): any; +} diff --git a/node_modules/fast-xml-parser/src/fxp.js b/node_modules/fast-xml-parser/src/fxp.js new file mode 100644 index 00000000..9cfa0ac0 --- /dev/null +++ b/node_modules/fast-xml-parser/src/fxp.js @@ -0,0 +1,11 @@ +'use strict'; + +const validator = require('./validator'); +const XMLParser = require('./xmlparser/XMLParser'); +const XMLBuilder = require('./xmlbuilder/json2xml'); + +module.exports = { + XMLParser: XMLParser, + XMLValidator: validator, + XMLBuilder: XMLBuilder +} \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/ignoreAttributes.js b/node_modules/fast-xml-parser/src/ignoreAttributes.js new file mode 100644 index 00000000..9fb346bb --- /dev/null +++ b/node_modules/fast-xml-parser/src/ignoreAttributes.js @@ -0,0 +1,20 @@ +function getIgnoreAttributesFn(ignoreAttributes) { + if (typeof ignoreAttributes === 'function') { + return ignoreAttributes + } + if (Array.isArray(ignoreAttributes)) { + return (attrName) => { + for (const pattern of ignoreAttributes) { + if (typeof pattern === 'string' && attrName === pattern) { + return true + } + if (pattern instanceof RegExp && pattern.test(attrName)) { + return true + } + } + } + } + return () => false +} + +module.exports = getIgnoreAttributesFn \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/util.js b/node_modules/fast-xml-parser/src/util.js new file mode 100644 index 00000000..df0a60d5 --- /dev/null +++ b/node_modules/fast-xml-parser/src/util.js @@ -0,0 +1,72 @@ +'use strict'; + +const nameStartChar = ':A-Za-z_\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD'; +const nameChar = nameStartChar + '\\-.\\d\\u00B7\\u0300-\\u036F\\u203F-\\u2040'; +const nameRegexp = '[' + nameStartChar + '][' + nameChar + ']*' +const regexName = new RegExp('^' + nameRegexp + '$'); + +const getAllMatches = function(string, regex) { + const matches = []; + let match = regex.exec(string); + while (match) { + const allmatches = []; + allmatches.startIndex = regex.lastIndex - match[0].length; + const len = match.length; + for (let index = 0; index < len; index++) { + allmatches.push(match[index]); + } + matches.push(allmatches); + match = regex.exec(string); + } + return matches; +}; + +const isName = function(string) { + const match = regexName.exec(string); + return !(match === null || typeof match === 'undefined'); +}; + +exports.isExist = function(v) { + return typeof v !== 'undefined'; +}; + +exports.isEmptyObject = function(obj) { + return Object.keys(obj).length === 0; +}; + +/** + * Copy all the properties of a into b. + * @param {*} target + * @param {*} a + */ +exports.merge = function(target, a, arrayMode) { + if (a) { + const keys = Object.keys(a); // will return an array of own properties + const len = keys.length; //don't make it inline + for (let i = 0; i < len; i++) { + if (arrayMode === 'strict') { + target[keys[i]] = [ a[keys[i]] ]; + } else { + target[keys[i]] = a[keys[i]]; + } + } + } +}; +/* exports.merge =function (b,a){ + return Object.assign(b,a); +} */ + +exports.getValue = function(v) { + if (exports.isExist(v)) { + return v; + } else { + return ''; + } +}; + +// const fakeCall = function(a) {return a;}; +// const fakeCallNoReturn = function() {}; + +exports.isName = isName; +exports.getAllMatches = getAllMatches; +exports.nameRegexp = nameRegexp; diff --git a/node_modules/fast-xml-parser/src/v5/CharsSymbol.js b/node_modules/fast-xml-parser/src/v5/CharsSymbol.js new file mode 100644 index 00000000..fa5ce9e8 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/CharsSymbol.js @@ -0,0 +1,16 @@ +modules.export = { + "<" : "<", //tag start + ">" : ">", //tag end + "/" : "/", //close tag + "!" : "!", //comment or docttype + "!--" : "!--", //comment + "-->" : "-->", //comment end + "?" : "?", //pi + "?>" : "?>", //pi end + "?xml" : "?xml", //pi end + "![" : "![", //cdata + "]]>" : "]]>", //cdata end + "[" : "[", + "-" : "-", + "D" : "D", +} \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/EntitiesParser.js b/node_modules/fast-xml-parser/src/v5/EntitiesParser.js new file mode 100644 index 00000000..62cc02ff --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/EntitiesParser.js @@ -0,0 +1,107 @@ +const ampEntity = { regex: /&(amp|#38|#x26);/g, val : "&"}; +const htmlEntities = { + "space": { regex: /&(nbsp|#160);/g, val: " " }, + // "lt" : { regex: /&(lt|#60);/g, val: "<" }, + // "gt" : { regex: /&(gt|#62);/g, val: ">" }, + // "amp" : { regex: /&(amp|#38);/g, val: "&" }, + // "quot" : { regex: /&(quot|#34);/g, val: "\"" }, + // "apos" : { regex: /&(apos|#39);/g, val: "'" }, + "cent" : { regex: /&(cent|#162);/g, val: "¢" }, + "pound" : { regex: /&(pound|#163);/g, val: "£" }, + "yen" : { regex: /&(yen|#165);/g, val: "¥" }, + "euro" : { regex: /&(euro|#8364);/g, val: "€" }, + "copyright" : { regex: /&(copy|#169);/g, val: "©" }, + "reg" : { regex: /&(reg|#174);/g, val: "®" }, + "inr" : { regex: /&(inr|#8377);/g, val: "₹" }, + "num_dec": { regex: /&#([0-9]{1,7});/g, val : (_, str) => String.fromCharCode(Number.parseInt(str, 10)) }, + "num_hex": { regex: /&#x([0-9a-fA-F]{1,6});/g, val : (_, str) => String.fromCharCode(Number.parseInt(str, 16)) }, +}; + +class EntitiesParser{ + constructor(replaceHtmlEntities) { + this.replaceHtmlEntities = replaceHtmlEntities; + this.docTypeEntities = {}; + this.lastEntities = { + "apos" : { regex: /&(apos|#39|#x27);/g, val : "'"}, + "gt" : { regex: /&(gt|#62|#x3E);/g, val : ">"}, + "lt" : { regex: /&(lt|#60|#x3C);/g, val : "<"}, + "quot" : { regex: /&(quot|#34|#x22);/g, val : "\""}, + }; + } + + addExternalEntities(externalEntities){ + const entKeys = Object.keys(externalEntities); + for (let i = 0; i < entKeys.length; i++) { + const ent = entKeys[i]; + this.addExternalEntity(ent,externalEntities[ent]) + } + } + addExternalEntity(key,val){ + validateEntityName(key); + if(val.indexOf("&") !== -1) { + reportWarning(`Entity ${key} is not added as '&' is found in value;`) + return; + }else{ + this.lastEntities[ent] = { + regex: new RegExp("&"+key+";","g"), + val : val + } + } + } + + addDocTypeEntities(entities){ + const entKeys = Object.keys(entities); + for (let i = 0; i < entKeys.length; i++) { + const ent = entKeys[i]; + this.docTypeEntities[ent] = { + regex: new RegExp("&"+ent+";","g"), + val : entities[ent] + } + } + } + + parse(val){ + return this.replaceEntitiesValue(val) + } + + /** + * 1. Replace DOCTYPE entities + * 2. Replace external entities + * 3. Replace HTML entities if asked + * @param {string} val + */ + replaceEntitiesValue(val){ + if(typeof val === "string" && val.length > 0){ + for(let entityName in this.docTypeEntities){ + const entity = this.docTypeEntities[entityName]; + val = val.replace( entity.regx, entity.val); + } + for(let entityName in this.lastEntities){ + const entity = this.lastEntities[entityName]; + val = val.replace( entity.regex, entity.val); + } + if(this.replaceHtmlEntities){ + for(let entityName in htmlEntities){ + const entity = htmlEntities[entityName]; + val = val.replace( entity.regex, entity.val); + } + } + val = val.replace( ampEntity.regex, ampEntity.val); + } + return val; + } +}; + +//an entity name should not contains special characters that may be used in regex +//Eg !?\\\/[]$%{}^&*()<> +const specialChar = "!?\\\/[]$%{}^&*()<>|+"; + +function validateEntityName(name){ + for (let i = 0; i < specialChar.length; i++) { + const ch = specialChar[i]; + if(name.indexOf(ch) !== -1) throw new Error(`Invalid character ${ch} in entity name`); + } + return name; +} + +module.exports = EntitiesParser; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/OptionsBuilder.js b/node_modules/fast-xml-parser/src/v5/OptionsBuilder.js new file mode 100755 index 00000000..be1f1d4f --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/OptionsBuilder.js @@ -0,0 +1,64 @@ + +const JsObjOutputBuilder = require("./OutputBuilders/JsObjBuilder"); + +const defaultOptions = { + preserveOrder: false, + removeNSPrefix: false, // remove NS from tag name or attribute name if true + //ignoreRootElement : false, + stopNodes: [], //nested tags will not be parsed even for errors + // isArray: () => false, //User will set it + htmlEntities: false, + // skipEmptyListItem: false + tags:{ + unpaired: [], + nameFor:{ + cdata: false, + comment: false, + text: '#text' + }, + separateTextProperty: false, + }, + attributes:{ + ignore: false, + booleanType: true, + entities: true, + }, + + // select: ["img[src]"], + // stop: ["anim", "[ads]"] + only: [], // rest tags will be skipped. It will result in flat array + hierarchy: false, //will be used when a particular tag is set to be parsed. + skip: [], // will be skipped from parse result. on('skip') will be triggered + + select: [], // on('select', tag => tag ) will be called if match + stop: [], //given tagPath will not be parsed. innerXML will be set as string value + OutputBuilder: new JsObjOutputBuilder(), +}; + +const buildOptions = function(options) { + const finalOptions = { ... defaultOptions}; + copyProperties(finalOptions,options) + return finalOptions; +}; + +function copyProperties(target, source) { + for (let key in source) { + if (source.hasOwnProperty(key)) { + if (key === 'OutputBuilder') { + target[key] = source[key]; + }else if (typeof source[key] === 'object' && !Array.isArray(source[key])) { + // Recursively copy nested properties + if (typeof target[key] === 'undefined') { + target[key] = {}; + } + copyProperties(target[key], source[key]); + } else { + // Copy non-nested properties + target[key] = source[key]; + } + } + } +} + +exports.buildOptions = buildOptions; +exports.defaultOptions = defaultOptions; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/OutputBuilders/BaseOutputBuilder.js b/node_modules/fast-xml-parser/src/v5/OutputBuilders/BaseOutputBuilder.js new file mode 100644 index 00000000..be2d478e --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/OutputBuilders/BaseOutputBuilder.js @@ -0,0 +1,71 @@ +class BaseOutputBuilder{ + constructor(){ + // this.attributes = {}; + } + + addAttribute(name, value){ + if(this.options.onAttribute){ + //TODO: better to pass tag path + const v = this.options.onAttribute(name, value, this.tagName); + if(v) this.attributes[v.name] = v.value; + }else{ + name = this.options.attributes.prefix + name + this.options.attributes.suffix; + this.attributes[name] = this.parseValue(value, this.options.attributes.valueParsers); + } + } + + /** + * parse value by chain of parsers + * @param {string} val + * @returns {any} parsed value if matching parser found + */ + parseValue = function(val, valParsers){ + for (let i = 0; i < valParsers.length; i++) { + let valParser = valParsers[i]; + if(typeof valParser === "string"){ + valParser = this.registeredParsers[valParser]; + } + if(valParser){ + val = valParser.parse(val); + } + } + return val; + } + + /** + * To add a nested empty tag. + * @param {string} key + * @param {any} val + */ + _addChild(key, val){} + + /** + * skip the comment if property is not set + */ + addComment(text){ + if(this.options.nameFor.comment) + this._addChild(this.options.nameFor.comment, text); + } + + //store CDATA separately if property is set + //otherwise add to tag's value + addCdata(text){ + if (this.options.nameFor.cdata) { + this._addChild(this.options.nameFor.cdata, text); + } else { + this.addRawValue(text || ""); + } + } + + addRawValue = text => this.addValue(text); + + addDeclaration(){ + if(!this.options.declaration){ + }else{ + this.addPi("?xml"); + } + this.attributes = {} + } +} + +module.exports = BaseOutputBuilder; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/OutputBuilders/JsArrBuilder.js b/node_modules/fast-xml-parser/src/v5/OutputBuilders/JsArrBuilder.js new file mode 100644 index 00000000..c63f6274 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/OutputBuilders/JsArrBuilder.js @@ -0,0 +1,103 @@ +const {buildOptions,registerCommonValueParsers} = require("./ParserOptionsBuilder"); + +class OutputBuilder{ + constructor(options){ + this.options = buildOptions(options); + this.registeredParsers = registerCommonValueParsers(this.options); + } + + registerValueParser(name,parserInstance){//existing name will override the parser without warning + this.registeredParsers[name] = parserInstance; + } + + getInstance(parserOptions){ + return new JsArrBuilder(parserOptions, this.options, this.registeredParsers); + } +} + +const rootName = '!js_arr'; +const BaseOutputBuilder = require("./BaseOutputBuilder"); + +class JsArrBuilder extends BaseOutputBuilder{ + + constructor(parserOptions, options,registeredParsers) { + super(); + this.tagsStack = []; + this.parserOptions = parserOptions; + this.options = options; + this.registeredParsers = registeredParsers; + + this.root = new Node(rootName); + this.currentNode = this.root; + this.attributes = {}; + } + + addTag(tag){ + //when a new tag is added, it should be added as child of current node + //TODO: shift this check to the parser + if(tag.name === "__proto__") tag.name = "#__proto__"; + + this.tagsStack.push(this.currentNode); + this.currentNode = new Node(tag.name, this.attributes); + this.attributes = {}; + } + + /** + * Check if the node should be added by checking user's preference + * @param {Node} node + * @returns boolean: true if the node should not be added + */ + closeTag(){ + const node = this.currentNode; + this.currentNode = this.tagsStack.pop(); //set parent node in scope + if(this.options.onClose !== undefined){ + //TODO TagPathMatcher + const resultTag = this.options.onClose(node, + new TagPathMatcher(this.tagsStack,node)); + + if(resultTag) return; + } + this.currentNode.child.push(node); //to parent node + } + + //Called by parent class methods + _addChild(key, val){ + // if(key === "__proto__") tagName = "#__proto__"; + this.currentNode.child.push( {[key]: val }); + // this.currentNode.leafType = false; + } + + /** + * Add text value child node + * @param {string} text + */ + addValue(text){ + this.currentNode.child.push( {[this.options.nameFor.text]: this.parseValue(text, this.options.tags.valueParsers) }); + } + + addPi(name){ + //TODO: set pi flag + if(!this.options.ignorePiTags){ + const node = new Node(name, this.attributes); + this.currentNode[":@"] = this.attributes; + this.currentNode.child.push(node); + } + this.attributes = {}; + } + getOutput(){ + return this.root.child[0]; + } +} + + + +class Node{ + constructor(tagname, attributes){ + this.tagname = tagname; + this.child = []; //nested tags, text, cdata, comments + if(attributes && Object.keys(attributes).length > 0) + this[":@"] = attributes; + } +} + +module.exports = OutputBuilder; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/OutputBuilders/JsMinArrBuilder.js b/node_modules/fast-xml-parser/src/v5/OutputBuilders/JsMinArrBuilder.js new file mode 100644 index 00000000..e0dc1e94 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/OutputBuilders/JsMinArrBuilder.js @@ -0,0 +1,102 @@ +const {buildOptions,registerCommonValueParsers} = require("./ParserOptionsBuilder"); + +class OutputBuilder{ + constructor(options){ + this.options = buildOptions(options); + this.registeredParsers = registerCommonValueParsers(this.options); + } + + registerValueParser(name,parserInstance){//existing name will override the parser without warning + this.registeredParsers[name] = parserInstance; + } + + getInstance(parserOptions){ + return new JsMinArrBuilder(parserOptions, this.options, this.registeredParsers); + } +} + +const BaseOutputBuilder = require("./BaseOutputBuilder"); +const rootName = '^'; + +class JsMinArrBuilder extends BaseOutputBuilder{ + + constructor(parserOptions, options,registeredParsers) { + super(); + this.tagsStack = []; + this.parserOptions = parserOptions; + this.options = options; + this.registeredParsers = registeredParsers; + + this.root = {[rootName]: []}; + this.currentNode = this.root; + this.currentNodeTagName = rootName; + this.attributes = {}; + } + + addTag(tag){ + //when a new tag is added, it should be added as child of current node + //TODO: shift this check to the parser + if(tag.name === "__proto__") tag.name = "#__proto__"; + + this.tagsStack.push([this.currentNodeTagName,this.currentNode]); //this.currentNode is parent node here + this.currentNodeTagName = tag.name; + this.currentNode = { [tag.name]:[]} + if(Object.keys(this.attributes).length > 0){ + this.currentNode[":@"] = this.attributes; + this.attributes = {}; + } + } + + /** + * Check if the node should be added by checking user's preference + * @param {Node} node + * @returns boolean: true if the node should not be added + */ + closeTag(){ + const node = this.currentNode; + const nodeName = this.currentNodeTagName; + const arr = this.tagsStack.pop(); //set parent node in scope + this.currentNodeTagName = arr[0]; + this.currentNode = arr[1]; + + if(this.options.onClose !== undefined){ + //TODO TagPathMatcher + const resultTag = this.options.onClose(node, + new TagPathMatcher(this.tagsStack,node)); + + if(resultTag) return; + } + this.currentNode[this.currentNodeTagName].push(node); //to parent node + } + + //Called by parent class methods + _addChild(key, val){ + // if(key === "__proto__") tagName = "#__proto__"; + this.currentNode.push( {[key]: val }); + // this.currentNode.leafType = false; + } + + /** + * Add text value child node + * @param {string} text + */ + addValue(text){ + this.currentNode[this.currentNodeTagName].push( {[this.options.nameFor.text]: this.parseValue(text, this.options.tags.valueParsers) }); + } + + addPi(name){ + if(!this.options.ignorePiTags){ + const node = { [name]:[]} + if(this.attributes){ + node[":@"] = this.attributes; + } + this.currentNode.push(node); + } + this.attributes = {}; + } + getOutput(){ + return this.root[rootName]; + } +} + +module.exports = OutputBuilder; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/OutputBuilders/JsObjBuilder.js b/node_modules/fast-xml-parser/src/v5/OutputBuilders/JsObjBuilder.js new file mode 100644 index 00000000..37036c52 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/OutputBuilders/JsObjBuilder.js @@ -0,0 +1,156 @@ + + +const {buildOptions,registerCommonValueParsers} = require("./ParserOptionsBuilder"); + +class OutputBuilder{ + constructor(builderOptions){ + this.options = buildOptions(builderOptions); + this.registeredParsers = registerCommonValueParsers(this.options); + } + + registerValueParser(name,parserInstance){//existing name will override the parser without warning + this.registeredParsers[name] = parserInstance; + } + + getInstance(parserOptions){ + return new JsObjBuilder(parserOptions, this.options, this.registeredParsers); + } +} + +const BaseOutputBuilder = require("./BaseOutputBuilder"); +const rootName = '^'; + +class JsObjBuilder extends BaseOutputBuilder{ + + constructor(parserOptions, builderOptions,registeredParsers) { + super(); + //hold the raw detail of a tag and sequence with reference to the output + this.tagsStack = []; + this.parserOptions = parserOptions; + this.options = builderOptions; + this.registeredParsers = registeredParsers; + + this.root = {}; + this.parent = this.root; + this.tagName = rootName; + this.value = {}; + this.textValue = ""; + this.attributes = {}; + } + + addTag(tag){ + + let value = ""; + if( !isEmpty(this.attributes)){ + value = {}; + if(this.options.attributes.groupBy){ + value[this.options.attributes.groupBy] = this.attributes; + }else{ + value = this.attributes; + } + } + + this.tagsStack.push([this.tagName, this.textValue, this.value]); //parent tag, parent text value, parent tag value (jsobj) + this.tagName = tag.name; + this.value = value; + this.textValue = ""; + this.attributes = {}; + } + + /** + * Check if the node should be added by checking user's preference + * @param {Node} node + * @returns boolean: true if the node should not be added + */ + closeTag(){ + const tagName = this.tagName; + let value = this.value; + let textValue = this.textValue; + + //update tag text value + if(typeof value !== "object" && !Array.isArray(value)){ + value = this.parseValue(textValue.trim(), this.options.tags.valueParsers); + }else if(textValue.length > 0){ + value[this.options.nameFor.text] = this.parseValue(textValue.trim(), this.options.tags.valueParsers); + } + + + let resultTag= { + tagName: tagName, + value: value + }; + + if(this.options.onTagClose !== undefined){ + //TODO TagPathMatcher + resultTag = this.options.onClose(tagName, value, this.textValue, new TagPathMatcher(this.tagsStack,node)); + + if(!resultTag) return; + } + + //set parent node in scope + let arr = this.tagsStack.pop(); + let parentTag = arr[2]; + parentTag=this._addChildTo(resultTag.tagName, resultTag.value, parentTag); + + this.tagName = arr[0]; + this.textValue = arr[1]; + this.value = parentTag; + } + + _addChild(key, val){ + if(typeof this.value === "string"){ + this.value = { [this.options.nameFor.text] : this.value }; + } + + this._addChildTo(key, val, this.value); + // this.currentNode.leafType = false; + this.attributes = {}; + } + + _addChildTo(key, val, node){ + if(typeof node === 'string') node = {}; + if(!node[key]){ + node[key] = val; + }else{ //Repeated + if(!Array.isArray(node[key])){ //but not stored as array + node[key] = [node[key]]; + } + node[key].push(val); + } + return node; + } + + + /** + * Add text value child node + * @param {string} text + */ + addValue(text){ + //TODO: use bytes join + if(this.textValue.length > 0) this.textValue += " " + text; + else this.textValue = text; + } + + addPi(name){ + let value = ""; + if( !isEmpty(this.attributes)){ + value = {}; + if(this.options.attributes.groupBy){ + value[this.options.attributes.groupBy] = this.attributes; + }else{ + value = this.attributes; + } + } + this._addChild(name, value); + + } + getOutput(){ + return this.value; + } +} + +function isEmpty(obj) { + return Object.keys(obj).length === 0; +} + +module.exports = OutputBuilder; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/OutputBuilders/ParserOptionsBuilder.js b/node_modules/fast-xml-parser/src/v5/OutputBuilders/ParserOptionsBuilder.js new file mode 100644 index 00000000..c71ea94a --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/OutputBuilders/ParserOptionsBuilder.js @@ -0,0 +1,99 @@ +const trimParser = require("../valueParsers/trim") +const booleanParser = require("../valueParsers/booleanParser") +const currencyParser = require("../valueParsers/currency") +const numberParser = require("../valueParsers/number") + +const defaultOptions={ + nameFor:{ + text: "#text", + comment: "", + cdata: "", + }, + // onTagClose: () => {}, + // onAttribute: () => {}, + piTag: false, + declaration: false, //"?xml" + tags: { + valueParsers: [ + // "trim", + // "boolean", + // "number", + // "currency", + // "date", + ] + }, + attributes:{ + prefix: "@_", + suffix: "", + groupBy: "", + + valueParsers: [ + // "trim", + // "boolean", + // "number", + // "currency", + // "date", + ] + }, + dataType:{ + + } +} + +//TODO +const withJoin = ["trim","join", /*"entities",*/"number","boolean","currency"/*, "date"*/] +const withoutJoin = ["trim", /*"entities",*/"number","boolean","currency"/*, "date"*/] + +function buildOptions(options){ + //clone + const finalOptions = { ... defaultOptions}; + + //add config missed in cloning + finalOptions.tags.valueParsers.push(...withJoin) + if(!this.preserveOrder) + finalOptions.tags.valueParsers.push(...withoutJoin); + + //add config missed in cloning + finalOptions.attributes.valueParsers.push(...withJoin) + + //override configuration + copyProperties(finalOptions,options); + return finalOptions; +} + +function copyProperties(target, source) { + for (let key in source) { + if (source.hasOwnProperty(key)) { + if (typeof source[key] === 'object' && !Array.isArray(source[key])) { + // Recursively copy nested properties + if (typeof target[key] === 'undefined') { + target[key] = {}; + } + copyProperties(target[key], source[key]); + } else { + // Copy non-nested properties + target[key] = source[key]; + } + } + } +} + +function registerCommonValueParsers(options){ + return { + "trim": new trimParser(), + // "join": this.entityParser.parse, + "boolean": new booleanParser(), + "number": new numberParser({ + hex: true, + leadingZeros: true, + eNotation: true + }), + "currency": new currencyParser(), + // "date": this.entityParser.parse, + } +} + +module.exports = { + buildOptions : buildOptions, + registerCommonValueParsers: registerCommonValueParsers +} \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/Report.js b/node_modules/fast-xml-parser/src/v5/Report.js new file mode 100644 index 00000000..e69de29b diff --git a/node_modules/fast-xml-parser/src/v5/TagPath.js b/node_modules/fast-xml-parser/src/v5/TagPath.js new file mode 100644 index 00000000..d901cc3c --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/TagPath.js @@ -0,0 +1,81 @@ +class TagPath{ + constructor(pathStr){ + let text = ""; + let tName = ""; + let pos; + let aName = ""; + let aVal = ""; + this.stack = [] + + for (let i = 0; i < pathStr.length; i++) { + let ch = pathStr[i]; + if(ch === " ") { + if(text.length === 0) continue; + tName = text; text = ""; + }else if(ch === "["){ + if(tName.length === 0){ + tName = text; text = ""; + } + i++; + for (; i < pathStr.length; i++) { + ch = pathStr[i]; + if(ch=== "=") continue; + else if(ch=== "]") {aName = text.trim(); text=""; break; i--;} + else if(ch === "'" || ch === '"'){ + let attrEnd = pathStr.indexOf(ch,i+1); + aVal = pathStr.substring(i+1, attrEnd); + i = attrEnd; + }else{ + text +=ch; + } + } + }else if(ch !== " " && text.length === 0 && tName.length > 0){//reading tagName + //save previous tag + this.stack.push(new TagPathNode(tName,pos,aName,aVal)); + text = ch; tName = ""; aName = ""; aVal = ""; + }else{ + text+=ch; + } + } + + //last tag in the path + if(tName.length >0 || text.length>0){ + this.stack.push(new TagPathNode(text||tName,pos,aName,aVal)); + } + } + + match(tagStack,node){ + if(this.stack[0].name !== "*"){ + if(this.stack.length !== tagStack.length +1) return false; + + //loop through tagPath and tagStack and match + for (let i = 0; i < this.tagStack.length; i++) { + if(!this.stack[i].match(tagStack[i])) return false; + } + } + if(!this.stack[this.stack.length - 1].match(node)) return false; + return true; + } +} + +class TagPathNode{ + constructor(name,position,attrName,attrVal){ + this.name = name; + this.position = position; + this.attrName = attrName, + this.attrVal = attrVal; + } + + match(node){ + let matching = true; + matching = node.name === this.name; + if(this.position) matching = node.position === this.position; + if(this.attrName) matching = node.attrs[this.attrName !== undefined]; + if(this.attrVal) matching = node.attrs[this.attrName !== this.attrVal]; + return matching; + } +} + +// console.log((new TagPath("* b[b]")).stack); +// console.log((new TagPath("a[a] b[b] c")).stack); +// console.log((new TagPath(" b [ b= 'cf sdadwa' ] a ")).stack); \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/TagPathMatcher.js b/node_modules/fast-xml-parser/src/v5/TagPathMatcher.js new file mode 100644 index 00000000..af236070 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/TagPathMatcher.js @@ -0,0 +1,15 @@ +const TagPath = require("./TagPath"); + +class TagPathMatcher{ + constructor(stack,node){ + this.stack = stack; + this.node= node; + } + + match(path){ + const tagPath = new TagPath(path); + return tagPath.match(this.stack, this.node); + } +} + +module.exports = TagPathMatcher; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/XMLParser.js b/node_modules/fast-xml-parser/src/v5/XMLParser.js new file mode 100755 index 00000000..6de58ed1 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/XMLParser.js @@ -0,0 +1,85 @@ +const { buildOptions} = require("./OptionsBuilder"); +const Xml2JsParser = require("./Xml2JsParser"); + +class XMLParser{ + + constructor(options){ + this.externalEntities = {}; + this.options = buildOptions(options); + // console.log(this.options) + } + /** + * Parse XML data string to JS object + * @param {string|Buffer} xmlData + * @param {boolean|Object} validationOption + */ + parse(xmlData){ + if(Array.isArray(xmlData) && xmlData.byteLength !== undefined){ + return this.parse(xmlData); + }else if( xmlData.toString){ + xmlData = xmlData.toString(); + }else{ + throw new Error("XML data is accepted in String or Bytes[] form.") + } + // if( validationOption){ + // if(validationOption === true) validationOption = {}; //validate with default options + + // const result = validator.validate(xmlData, validationOption); + // if (result !== true) { + // throw Error( `${result.err.msg}:${result.err.line}:${result.err.col}` ) + // } + // } + const parser = new Xml2JsParser(this.options); + parser.entityParser.addExternalEntities(this.externalEntities); + return parser.parse(xmlData); + } + /** + * Parse XML data buffer to JS object + * @param {string|Buffer} xmlData + * @param {boolean|Object} validationOption + */ + parseBytesArr(xmlData){ + if(Array.isArray(xmlData) && xmlData.byteLength !== undefined){ + }else{ + throw new Error("XML data is accepted in Bytes[] form.") + } + const parser = new Xml2JsParser(this.options); + parser.entityParser.addExternalEntities(this.externalEntities); + return parser.parseBytesArr(xmlData); + } + /** + * Parse XML data stream to JS object + * @param {fs.ReadableStream} xmlDataStream + */ + parseStream(xmlDataStream){ + if(!isStream(xmlDataStream)) throw new Error("FXP: Invalid stream input"); + + const orderedObjParser = new Xml2JsParser(this.options); + orderedObjParser.entityParser.addExternalEntities(this.externalEntities); + return orderedObjParser.parseStream(xmlDataStream); + } + + /** + * Add Entity which is not by default supported by this library + * @param {string} key + * @param {string} value + */ + addEntity(key, value){ + if(value.indexOf("&") !== -1){ + throw new Error("Entity value can't have '&'") + }else if(key.indexOf("&") !== -1 || key.indexOf(";") !== -1){ + throw new Error("An entity must be set without '&' and ';'. Eg. use '#xD' for ' '") + }else if(value === "&"){ + throw new Error("An entity with value '&' is not permitted"); + }else{ + this.externalEntities[key] = value; + } + } +} + +function isStream(stream){ + if(stream && typeof stream.read === "function" && typeof stream.on === "function" && typeof stream.readableEnded === "boolean") return true; + return false; +} + +module.exports = XMLParser; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/Xml2JsParser.js b/node_modules/fast-xml-parser/src/v5/Xml2JsParser.js new file mode 100644 index 00000000..c4baab45 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/Xml2JsParser.js @@ -0,0 +1,237 @@ +const StringSource = require("./inputSource/StringSource"); +const BufferSource = require("./inputSource/BufferSource"); +const {readTagExp,readClosingTagName} = require("./XmlPartReader"); +const {readComment, readCdata,readDocType,readPiTag} = require("./XmlSpecialTagsReader"); +const TagPath = require("./TagPath"); +const TagPathMatcher = require("./TagPathMatcher"); +const EntitiesParser = require('./EntitiesParser'); + +//To hold the data of current tag +//This is usually used to compare jpath expression against current tag +class TagDetail{ + constructor(name){ + this.name = name; + this.position = 0; + // this.attributes = {}; + } +} + +class Xml2JsParser { + constructor(options) { + this.options = options; + + this.currentTagDetail = null; + this.tagTextData = ""; + this.tagsStack = []; + this.entityParser = new EntitiesParser(options.htmlEntities); + this.stopNodes = []; + for (let i = 0; i < this.options.stopNodes.length; i++) { + this.stopNodes.push(new TagPath(this.options.stopNodes[i])); + } + } + + parse(strData) { + this.source = new StringSource(strData); + this.parseXml(); + return this.outputBuilder.getOutput(); + } + parseBytesArr(data) { + this.source = new BufferSource(data ); + this.parseXml(); + return this.outputBuilder.getOutput(); + } + + parseXml() { + //TODO: Separate TagValueParser as separate class. So no scope issue in node builder class + + //OutputBuilder should be set in XML Parser + this.outputBuilder = this.options.OutputBuilder.getInstance(this.options); + this.root = { root: true}; + this.currentTagDetail = this.root; + + while(this.source.canRead()){ + let ch = this.source.readCh(); + if (ch === "") break; + + if(ch === "<"){//tagStart + let nextChar = this.source.readChAt(0); + if (nextChar === "" ) throw new Error("Unexpected end of source"); + + + if(nextChar === "!" || nextChar === "?"){ + this.source.updateBufferBoundary(); + //previously collected text should be added to current node + this.addTextNode(); + + this.readSpecialTag(nextChar);// Read DOCTYPE, comment, CDATA, PI tag + }else if(nextChar === "/"){ + this.source.updateBufferBoundary(); + this.readClosingTag(); + // console.log(this.source.buffer.length, this.source.readable); + // console.log(this.tagsStack.length); + }else{//opening tag + this.readOpeningTag(); + } + }else{ + this.tagTextData += ch; + } + }//End While loop + if(this.tagsStack.length > 0 || ( this.tagTextData !== "undefined" && this.tagTextData.trimEnd().length > 0) ) throw new Error("Unexpected data in the end of document"); + } + + /** + * read closing paired tag. Set parent tag in scope. + * skip a node on user's choice + */ + readClosingTag(){ + const tagName = this.processTagName(readClosingTagName(this.source)); + // console.log(tagName, this.tagsStack.length); + this.validateClosingTag(tagName); + // All the text data collected, belongs to current tag. + if(!this.currentTagDetail.root) this.addTextNode(); + this.outputBuilder.closeTag(); + // Since the tag is closed now, parent tag comes in scope + this.currentTagDetail = this.tagsStack.pop(); + } + + validateClosingTag(tagName){ + // This can't be unpaired tag, or a stop tag. + if(this.isUnpaired(tagName) || this.isStopNode(tagName)) throw new Error(`Unexpected closing tag '${tagName}'`); + // This must match with last opening tag + else if(tagName !== this.currentTagDetail.name) + throw new Error(`Unexpected closing tag '${tagName}' expecting '${this.currentTagDetail.name}'`) + } + + /** + * Read paired, unpaired, self-closing, stop and special tags. + * Create a new node + * Push paired tag in stack. + */ + readOpeningTag(){ + //save previously collected text data to current node + this.addTextNode(); + + //create new tag + let tagExp = readTagExp(this, ">" ); + + // process and skip from tagsStack For unpaired tag, self closing tag, and stop node + const tagDetail = new TagDetail(tagExp.tagName); + if(this.isUnpaired(tagExp.tagName)) { + //TODO: this will lead 2 extra stack operation + this.outputBuilder.addTag(tagDetail); + this.outputBuilder.closeTag(); + } else if(tagExp.selfClosing){ + this.outputBuilder.addTag(tagDetail); + this.outputBuilder.closeTag(); + } else if(this.isStopNode(this.currentTagDetail)){ + // TODO: let's user set a stop node boundary detector for complex contents like script tag + //TODO: pass tag name only to avoid string operations + const content = source.readUptoCloseTag(` 0){ + //TODO: shift parsing to output builder + + this.outputBuilder.addValue(this.replaceEntities(this.tagTextData)); + } + this.tagTextData = ""; + } + // } + } + + processAttrName(name){ + if(name === "__proto__") name = "#__proto__"; + name = resolveNameSpace(name, this.removeNSPrefix); + return name; + } + + processTagName(name){ + if(name === "__proto__") name = "#__proto__"; + name = resolveNameSpace(name, this.removeNSPrefix); + return name; + } + + /** + * Generate tags path from tagsStack + */ + tagsPath(tagName){ + //TODO: return TagPath Object. User can call match method with path + return ""; + } + + isUnpaired(tagName){ + return this.options.tags.unpaired.indexOf(tagName) !== -1; + } + + /** + * valid expressions are + * tag nested + * * nested + * tag nested[attribute] + * tag nested[attribute=""] + * tag nested[attribute!=""] + * tag nested:0 //for future + * @param {string} tagName + * @returns + */ + isStopNode(node){ + for (let i = 0; i < this.stopNodes.length; i++) { + const givenPath = this.stopNodes[i]; + if(givenPath.match(this.tagsStack, node)) return true; + } + return false + } + + replaceEntities(text){ + //TODO: if option is set then replace entities + return this.entityParser.parse(text) + } +} + +function resolveNameSpace(name, removeNSPrefix) { + if (removeNSPrefix) { + const parts = name.split(':'); + if(parts.length === 2){ + if (parts[0] === 'xmlns') return ''; + else return parts[1]; + }else reportError(`Multiple namespaces ${name}`) + } + return name; +} + +module.exports = Xml2JsParser; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/XmlPartReader.js b/node_modules/fast-xml-parser/src/v5/XmlPartReader.js new file mode 100644 index 00000000..b77fb68d --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/XmlPartReader.js @@ -0,0 +1,216 @@ +'use strict'; + +/** + * find paired tag for a stop node + * @param {string} xmlDoc + * @param {string} tagName + * @param {number} i : start index + */ +function readStopNode(xmlDoc, tagName, i){ + const startIndex = i; + // Starting at 1 since we already have an open tag + let openTagCount = 1; + + for (; i < xmlDoc.length; i++) { + if( xmlDoc[i] === "<"){ + if (xmlDoc[i+1] === "/") {//close tag + const closeIndex = findSubStrIndex(xmlDoc, ">", i, `${tagName} is not closed`); + let closeTagName = xmlDoc.substring(i+2,closeIndex).trim(); + if(closeTagName === tagName){ + openTagCount--; + if (openTagCount === 0) { + return { + tagContent: xmlDoc.substring(startIndex, i), + i : closeIndex + } + } + } + i=closeIndex; + } else if(xmlDoc[i+1] === '?') { + const closeIndex = findSubStrIndex(xmlDoc, "?>", i+1, "StopNode is not closed.") + i=closeIndex; + } else if(xmlDoc.substr(i + 1, 3) === '!--') { + const closeIndex = findSubStrIndex(xmlDoc, "-->", i+3, "StopNode is not closed.") + i=closeIndex; + } else if(xmlDoc.substr(i + 1, 2) === '![') { + const closeIndex = findSubStrIndex(xmlDoc, "]]>", i, "StopNode is not closed.") - 2; + i=closeIndex; + } else { + const tagData = readTagExp(xmlDoc, i, '>') + + if (tagData) { + const openTagName = tagData && tagData.tagName; + if (openTagName === tagName && tagData.tagExp[tagData.tagExp.length-1] !== "/") { + openTagCount++; + } + i=tagData.closeIndex; + } + } + } + }//end for loop +} + +/** + * Read closing tag name + * @param {Source} source + * @returns tag name + */ +function readClosingTagName(source){ + let text = ""; //temporary data + while(source.canRead()){ + let ch = source.readCh(); + // if (ch === null || ch === undefined) break; + // source.updateBuffer(); + + if (ch === ">") return text.trimEnd(); + else text += ch; + } + throw new Error(`Unexpected end of source. Reading '${substr}'`); +} + +/** + * Read XML tag and build attributes map + * This function can be used to read normal tag, pi tag. + * This function can't be used to read comment, CDATA, DOCTYPE. + * Eg + * @param {string} xmlDoc + * @param {number} startIndex starting index + * @returns tag expression includes tag name & attribute string + */ +function readTagExp(parser) { + let inSingleQuotes = false; + let inDoubleQuotes = false; + let i; + let EOE = false; + + for (i = 0; parser.source.canRead(i); i++) { + const char = parser.source.readChAt(i); + + if (char === "'" && !inDoubleQuotes) { + inSingleQuotes = !inSingleQuotes; + } else if (char === '"' && !inSingleQuotes) { + inDoubleQuotes = !inDoubleQuotes; + } else if (char === '>' && !inSingleQuotes && !inDoubleQuotes) { + // If not inside quotes, stop reading at '>' + EOE = true; + break; + } + + } + if(inSingleQuotes || inDoubleQuotes){ + throw new Error("Invalid attribute expression. Quote is not properly closed"); + }else if(!EOE) throw new Error("Unexpected closing of source. Waiting for '>'"); + + + const exp = parser.source.readStr(i); + parser.source.updateBufferBoundary(i + 1); + return buildTagExpObj(exp, parser) +} + +function readPiExp(parser) { + let inSingleQuotes = false; + let inDoubleQuotes = false; + let i; + let EOE = false; + + for (i = 0; parser.source.canRead(i) ; i++) { + const currentChar = parser.source.readChAt(i); + const nextChar = parser.source.readChAt(i+1); + + if (currentChar === "'" && !inDoubleQuotes) { + inSingleQuotes = !inSingleQuotes; + } else if (currentChar === '"' && !inSingleQuotes) { + inDoubleQuotes = !inDoubleQuotes; + } + + if (!inSingleQuotes && !inDoubleQuotes) { + if (currentChar === '?' && nextChar === '>') { + EOE = true; + break; // Exit the loop when '?>' is found + } + } + } + if(inSingleQuotes || inDoubleQuotes){ + throw new Error("Invalid attribute expression. Quote is not properly closed in PI tag expression"); + }else if(!EOE) throw new Error("Unexpected closing of source. Waiting for '?>'"); + + if(!parser.options.attributes.ignore){ + //TODO: use regex to verify attributes if not set to ignore + } + + const exp = parser.source.readStr(i); + parser.source.updateBufferBoundary(i + 1); + return buildTagExpObj(exp, parser) +} + +function buildTagExpObj(exp, parser){ + const tagExp = { + tagName: "", + selfClosing: false + }; + let attrsExp = ""; + + // Check for self-closing tag before setting the name + if(exp[exp.length -1] === "/") { + tagExp.selfClosing = true; + exp = exp.slice(0, -1); // Remove the trailing slash + } + + //separate tag name + let i = 0; + for (; i < exp.length; i++) { + const char = exp[i]; + if(char === " "){ + tagExp.tagName = exp.substring(0, i); + attrsExp = exp.substring(i + 1); + break; + } + } + //only tag + if(tagExp.tagName.length === 0 && i === exp.length)tagExp.tagName = exp; + + tagExp.tagName = tagExp.tagName.trimEnd(); + + if(!parser.options.attributes.ignore && attrsExp.length > 0){ + parseAttributesExp(attrsExp,parser) + } + + return tagExp; +} + +const attrsRegx = new RegExp('([^\\s=]+)\\s*(=\\s*([\'"])([\\s\\S]*?)\\3)?', 'gm'); + +function parseAttributesExp(attrStr, parser) { + const matches = getAllMatches(attrStr, attrsRegx); + const len = matches.length; //don't make it inline + for (let i = 0; i < len; i++) { + let attrName = parser.processAttrName(matches[i][1]); + let attrVal = parser.replaceEntities(matches[i][4] || true); + + parser.outputBuilder.addAttribute(attrName, attrVal); + } +} + + +const getAllMatches = function(string, regex) { + const matches = []; + let match = regex.exec(string); + while (match) { + const allmatches = []; + allmatches.startIndex = regex.lastIndex - match[0].length; + const len = match.length; + for (let index = 0; index < len; index++) { + allmatches.push(match[index]); + } + matches.push(allmatches); + match = regex.exec(string); + } + return matches; +}; + +module.exports = { + readStopNode: readStopNode, + readClosingTagName: readClosingTagName, + readTagExp: readTagExp, + readPiExp: readPiExp, +} diff --git a/node_modules/fast-xml-parser/src/v5/XmlSpecialTagsReader.js b/node_modules/fast-xml-parser/src/v5/XmlSpecialTagsReader.js new file mode 100644 index 00000000..0fba196a --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/XmlSpecialTagsReader.js @@ -0,0 +1,118 @@ +const {readPiExp} = require("./XmlPartReader"); + +function readCdata(parser){ + //"); + parser.outputBuilder.addCdata(text); +} +function readPiTag(parser){ + //"); + if(!tagExp) throw new Error("Invalid Pi Tag expression."); + + if (tagExp.tagName === "?xml") {//TODO: test if tagName is just xml + parser.outputBuilder.addDeclaration(); + } else { + parser.outputBuilder.addPi("?"+tagExp.tagName); + } +} + +function readComment(parser){ + //"); + parser.outputBuilder.addComment(text); +} + +const DOCTYPE_tags = { + "EL":/^EMENT\s+([^\s>]+)\s+(ANY|EMPTY|\(.+\)\s*$)/m, + "AT":/^TLIST\s+[^\s]+\s+[^\s]+\s+[^\s]+\s+[^\s]+\s+$/m, + "NO":/^TATION.+$/m +} +function readDocType(parser){ + //"); + const regx = DOCTYPE_tags[str]; + if(regx){ + const match = dTagExp.match(regx); + if(!match) throw new Error("Invalid DOCTYPE"); + }else throw new Error("Invalid DOCTYPE"); + } + }else if( ch === '>' && lastch === "]"){//end of doctype + return; + } + }else if( ch === '>'){//end of doctype + return; + }else if( ch === '['){ + hasBody = true; + }else{ + lastch = ch; + } + }//End While loop + +} + +function registerEntity(parser){ + //read Entity + let attrBoundary=""; + let name ="", val =""; + while(source.canRead()){ + let ch = source.readCh(); + + if(attrBoundary){ + if (ch === attrBoundary){ + val = text; + text = "" + } + }else if(ch === " " || ch === "\t"){ + if(!name){ + name = text.trimStart(); + text = ""; + } + }else if (ch === '"' || ch === "'") {//start of attrBoundary + attrBoundary = ch; + }else if(ch === ">"){ + parser.entityParser.addExternalEntity(name,val); + return; + }else{ + text+=ch; + } + } +} + +module.exports = { + readCdata: readCdata, + readComment:readComment, + readDocType:readDocType, + readPiTag:readPiTag +} \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/inputSource/BufferSource.js b/node_modules/fast-xml-parser/src/v5/inputSource/BufferSource.js new file mode 100644 index 00000000..b83ce460 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/inputSource/BufferSource.js @@ -0,0 +1,118 @@ +const Constants = { + space: 32, + tab: 9 +} +class BufferSource{ + constructor(bytesArr){ + this.line = 1; + this.cols = 0; + this.buffer = bytesArr; + this.startIndex = 0; + } + + + + readCh() { + return String.fromCharCode(this.buffer[this.startIndex++]); + } + + readChAt(index) { + return String.fromCharCode(this.buffer[this.startIndex+index]); + } + + readStr(n,from){ + if(typeof from === "undefined") from = this.startIndex; + return this.buffer.slice(from, from + n).toString(); + } + + readUpto(stopStr) { + const inputLength = this.buffer.length; + const stopLength = stopStr.length; + const stopBuffer = Buffer.from(stopStr); + + for (let i = this.startIndex; i < inputLength; i++) { + let match = true; + for (let j = 0; j < stopLength; j++) { + if (this.buffer[i + j] !== stopBuffer[j]) { + match = false; + break; + } + } + + if (match) { + const result = this.buffer.slice(this.startIndex, i).toString(); + this.startIndex = i + stopLength; + return result; + } + } + + throw new Error(`Unexpected end of source. Reading '${stopStr}'`); +} + +readUptoCloseTag(stopStr) { //stopStr: "'){ //TODO: if it should be equivalent ASCII + match = 2; + //tag boundary found + // this.startIndex + } + }else{ + match = 1; + for (let j = 0; j < stopLength; j++) { + if (this.buffer[i + j] !== stopBuffer[j]) { + match = 0; + break; + } + } + } + if (match === 2) {//matched closing part + const result = this.buffer.slice(this.startIndex, stopIndex - 1 ).toString(); + this.startIndex = i + 1; + return result; + } + } + + throw new Error(`Unexpected end of source. Reading '${stopStr}'`); +} + + readFromBuffer(n, shouldUpdate) { + let ch; + if (n === 1) { + ch = this.buffer[this.startIndex]; + if (ch === 10) { + this.line++; + this.cols = 1; + } else { + this.cols++; + } + ch = String.fromCharCode(ch); + } else { + this.cols += n; + ch = this.buffer.slice(this.startIndex, this.startIndex + n).toString(); + } + if (shouldUpdate) this.updateBuffer(n); + return ch; + } + + updateBufferBoundary(n = 1) { //n: number of characters read + this.startIndex += n; + } + + canRead(n){ + n = n || this.startIndex; + return this.buffer.length - n + 1 > 0; + } + +} + +module.exports = BufferSource; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/inputSource/StringSource.js b/node_modules/fast-xml-parser/src/v5/inputSource/StringSource.js new file mode 100644 index 00000000..a996528b --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/inputSource/StringSource.js @@ -0,0 +1,123 @@ +const whiteSpaces = [" ", "\n", "\t"]; + + +class StringSource{ + constructor(str){ + this.line = 1; + this.cols = 0; + this.buffer = str; + //a boundary pointer to indicate where from the buffer dat should be read + // data before this pointer can be deleted to free the memory + this.startIndex = 0; + } + + readCh() { + return this.buffer[this.startIndex++]; + } + + readChAt(index) { + return this.buffer[this.startIndex+index]; + } + + readStr(n,from){ + if(typeof from === "undefined") from = this.startIndex; + return this.buffer.substring(from, from + n); + } + + readUpto(stopStr) { + const inputLength = this.buffer.length; + const stopLength = stopStr.length; + + for (let i = this.startIndex; i < inputLength; i++) { + let match = true; + for (let j = 0; j < stopLength; j++) { + if (this.buffer[i + j] !== stopStr[j]) { + match = false; + break; + } + } + + if (match) { + const result = this.buffer.substring(this.startIndex, i); + this.startIndex = i + stopLength; + return result; + } + } + + throw new Error(`Unexpected end of source. Reading '${stopStr}'`); + } + + readUptoCloseTag(stopStr) { //stopStr: "'){ + match = 2; + //tag boundary found + // this.startIndex + } + }else{ + match = 1; + for (let j = 0; j < stopLength; j++) { + if (this.buffer[i + j] !== stopStr[j]) { + match = 0; + break; + } + } + } + if (match === 2) {//matched closing part + const result = this.buffer.substring(this.startIndex, stopIndex - 1 ); + this.startIndex = i + 1; + return result; + } + } + + throw new Error(`Unexpected end of source. Reading '${stopStr}'`); + } + + readFromBuffer(n, updateIndex){ + let ch; + if(n===1){ + ch = this.buffer[this.startIndex]; + // if(ch === "\n") { + // this.line++; + // this.cols = 1; + // }else{ + // this.cols++; + // } + }else{ + ch = this.buffer.substring(this.startIndex, this.startIndex + n); + // if("".indexOf("\n") !== -1){ + // //TODO: handle the scenario when there are multiple lines + // //TODO: col should be set to number of chars after last '\n' + // // this.cols = 1; + // }else{ + // this.cols += n; + + // } + } + if(updateIndex) this.updateBufferBoundary(n); + return ch; + } + + //TODO: rename to updateBufferReadIndex + + updateBufferBoundary(n = 1) { //n: number of characters read + this.startIndex += n; + } + + canRead(n){ + n = n || this.startIndex; + return this.buffer.length - n + 1 > 0; + } + +} + +module.exports = StringSource; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/valueParsers/EntitiesParser.js b/node_modules/fast-xml-parser/src/v5/valueParsers/EntitiesParser.js new file mode 100644 index 00000000..62cc02ff --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/valueParsers/EntitiesParser.js @@ -0,0 +1,107 @@ +const ampEntity = { regex: /&(amp|#38|#x26);/g, val : "&"}; +const htmlEntities = { + "space": { regex: /&(nbsp|#160);/g, val: " " }, + // "lt" : { regex: /&(lt|#60);/g, val: "<" }, + // "gt" : { regex: /&(gt|#62);/g, val: ">" }, + // "amp" : { regex: /&(amp|#38);/g, val: "&" }, + // "quot" : { regex: /&(quot|#34);/g, val: "\"" }, + // "apos" : { regex: /&(apos|#39);/g, val: "'" }, + "cent" : { regex: /&(cent|#162);/g, val: "¢" }, + "pound" : { regex: /&(pound|#163);/g, val: "£" }, + "yen" : { regex: /&(yen|#165);/g, val: "¥" }, + "euro" : { regex: /&(euro|#8364);/g, val: "€" }, + "copyright" : { regex: /&(copy|#169);/g, val: "©" }, + "reg" : { regex: /&(reg|#174);/g, val: "®" }, + "inr" : { regex: /&(inr|#8377);/g, val: "₹" }, + "num_dec": { regex: /&#([0-9]{1,7});/g, val : (_, str) => String.fromCharCode(Number.parseInt(str, 10)) }, + "num_hex": { regex: /&#x([0-9a-fA-F]{1,6});/g, val : (_, str) => String.fromCharCode(Number.parseInt(str, 16)) }, +}; + +class EntitiesParser{ + constructor(replaceHtmlEntities) { + this.replaceHtmlEntities = replaceHtmlEntities; + this.docTypeEntities = {}; + this.lastEntities = { + "apos" : { regex: /&(apos|#39|#x27);/g, val : "'"}, + "gt" : { regex: /&(gt|#62|#x3E);/g, val : ">"}, + "lt" : { regex: /&(lt|#60|#x3C);/g, val : "<"}, + "quot" : { regex: /&(quot|#34|#x22);/g, val : "\""}, + }; + } + + addExternalEntities(externalEntities){ + const entKeys = Object.keys(externalEntities); + for (let i = 0; i < entKeys.length; i++) { + const ent = entKeys[i]; + this.addExternalEntity(ent,externalEntities[ent]) + } + } + addExternalEntity(key,val){ + validateEntityName(key); + if(val.indexOf("&") !== -1) { + reportWarning(`Entity ${key} is not added as '&' is found in value;`) + return; + }else{ + this.lastEntities[ent] = { + regex: new RegExp("&"+key+";","g"), + val : val + } + } + } + + addDocTypeEntities(entities){ + const entKeys = Object.keys(entities); + for (let i = 0; i < entKeys.length; i++) { + const ent = entKeys[i]; + this.docTypeEntities[ent] = { + regex: new RegExp("&"+ent+";","g"), + val : entities[ent] + } + } + } + + parse(val){ + return this.replaceEntitiesValue(val) + } + + /** + * 1. Replace DOCTYPE entities + * 2. Replace external entities + * 3. Replace HTML entities if asked + * @param {string} val + */ + replaceEntitiesValue(val){ + if(typeof val === "string" && val.length > 0){ + for(let entityName in this.docTypeEntities){ + const entity = this.docTypeEntities[entityName]; + val = val.replace( entity.regx, entity.val); + } + for(let entityName in this.lastEntities){ + const entity = this.lastEntities[entityName]; + val = val.replace( entity.regex, entity.val); + } + if(this.replaceHtmlEntities){ + for(let entityName in htmlEntities){ + const entity = htmlEntities[entityName]; + val = val.replace( entity.regex, entity.val); + } + } + val = val.replace( ampEntity.regex, ampEntity.val); + } + return val; + } +}; + +//an entity name should not contains special characters that may be used in regex +//Eg !?\\\/[]$%{}^&*()<> +const specialChar = "!?\\\/[]$%{}^&*()<>|+"; + +function validateEntityName(name){ + for (let i = 0; i < specialChar.length; i++) { + const ch = specialChar[i]; + if(name.indexOf(ch) !== -1) throw new Error(`Invalid character ${ch} in entity name`); + } + return name; +} + +module.exports = EntitiesParser; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/valueParsers/booleanParser.js b/node_modules/fast-xml-parser/src/v5/valueParsers/booleanParser.js new file mode 100644 index 00000000..f8f5d12a --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/valueParsers/booleanParser.js @@ -0,0 +1,23 @@ +class boolParser{ + constructor(trueList, falseList){ + if(trueList) + this.trueList = trueList; + else + this.trueList = ["true"]; + + if(falseList) + this.falseList = falseList; + else + this.falseList = ["false"]; + } + parse(val){ + if (typeof val === 'string') { + //TODO: performance: don't convert + const temp = val.toLowerCase(); + if(this.trueList.indexOf(temp) !== -1) return true; + else if(this.falseList.indexOf(temp) !== -1 ) return false; + } + return val; + } +} +module.exports = boolParser; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/valueParsers/booleanParserExt.js b/node_modules/fast-xml-parser/src/v5/valueParsers/booleanParserExt.js new file mode 100644 index 00000000..21b80502 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/valueParsers/booleanParserExt.js @@ -0,0 +1,20 @@ +function boolParserExt(val){ + if(isArray(val)){ + for (let i = 0; i < val.length; i++) { + val[i] = parse(val[i]) + } + }else{ + val = parse(val) + } + return val; +} + +function parse(val){ + if (typeof val === 'string') { + const temp = val.toLowerCase(); + if(temp === 'true' || temp ==="yes" || temp==="1") return true; + else if(temp === 'false' || temp ==="no" || temp==="0") return false; + } + return val; +} +module.exports = boolParserExt; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/valueParsers/currency.js b/node_modules/fast-xml-parser/src/v5/valueParsers/currency.js new file mode 100644 index 00000000..82e21e75 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/valueParsers/currency.js @@ -0,0 +1,40 @@ +const defaultOptions = { + maxLength: 200, + // locale: "en-IN" +} +const localeMap = { + "$":"en-US", + "€":"de-DE", + "£":"en-GB", + "¥":"ja-JP", + "₹":"en-IN", +} +const sign = "(?:-|\+)?"; +const digitsAndSeparator = "(?:\d+|\d{1,3}(?:,\d{3})+)"; +const decimalPart = "(?:\.\d{1,2})?"; +const symbol = "(?:\$|€|¥|₹)?"; + +const currencyCheckRegex = /^\s*(?:-|\+)?(?:\d+|\d{1,3}(?:,\d{3})+)?(?:\.\d{1,2})?\s*(?:\$|€|¥|₹)?\s*$/u; + +class CurrencyParser{ + constructor(options){ + this.options = options || defaultOptions; + } + parse(val){ + if (typeof val === 'string' && val.length <= this.options.maxLength) { + if(val.indexOf(",,") !== -1 && val.indexOf(".." !== -1)){ + const match = val.match(currencyCheckRegex); + if(match){ + const locale = this.options.locale || localeMap[match[2]||match[5]||"₹"]; + const formatter = new Intl.NumberFormat(locale) + val = val.replace(/[^0-9,.]/g, '').trim(); + val = Number(val.replace(formatter.format(1000)[1], '')); + } + } + } + return val; + } +} +CurrencyParser.defaultOptions = defaultOptions; + +module.exports = CurrencyParser; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/valueParsers/join.js b/node_modules/fast-xml-parser/src/v5/valueParsers/join.js new file mode 100644 index 00000000..d7f2027d --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/valueParsers/join.js @@ -0,0 +1,14 @@ +/** + * + * @param {array} val + * @param {string} by + * @returns + */ +function join(val, by=" "){ + if(isArray(val)){ + val.join(by) + } + return val; +} + +module.exports = join; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/valueParsers/number.js b/node_modules/fast-xml-parser/src/v5/valueParsers/number.js new file mode 100644 index 00000000..bef3803c --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/valueParsers/number.js @@ -0,0 +1,16 @@ +const toNumber = require("strnum"); + + +class numParser{ + constructor(options){ + this.options = options; + } + parse(val){ + if (typeof val === 'string') { + val = toNumber(val,this.options); + } + return val; + } +} + +module.exports = numParser; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v5/valueParsers/trim.js b/node_modules/fast-xml-parser/src/v5/valueParsers/trim.js new file mode 100644 index 00000000..ecce49a1 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v5/valueParsers/trim.js @@ -0,0 +1,8 @@ +class trimmer{ + parse(val){ + if(typeof val === "string") return val.trim(); + else return val; + } +} + +module.exports = trimmer; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v6/CharsSymbol.js b/node_modules/fast-xml-parser/src/v6/CharsSymbol.js new file mode 100644 index 00000000..6ac2de4c --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/CharsSymbol.js @@ -0,0 +1,16 @@ +export default { + "<" : "<", //tag start + ">" : ">", //tag end + "/" : "/", //close tag + "!" : "!", //comment or docttype + "!--" : "!--", //comment + "-->" : "-->", //comment end + "?" : "?", //pi + "?>" : "?>", //pi end + "?xml" : "?xml", //pi end + "![" : "![", //cdata + "]]>" : "]]>", //cdata end + "[" : "[", + "-" : "-", + "D" : "D", +} \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v6/EntitiesParser.js b/node_modules/fast-xml-parser/src/v6/EntitiesParser.js new file mode 100644 index 00000000..0639dd10 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/EntitiesParser.js @@ -0,0 +1,104 @@ +const ampEntity = { regex: /&(amp|#38|#x26);/g, val : "&"}; +const htmlEntities = { + "space": { regex: /&(nbsp|#160);/g, val: " " }, + // "lt" : { regex: /&(lt|#60);/g, val: "<" }, + // "gt" : { regex: /&(gt|#62);/g, val: ">" }, + // "amp" : { regex: /&(amp|#38);/g, val: "&" }, + // "quot" : { regex: /&(quot|#34);/g, val: "\"" }, + // "apos" : { regex: /&(apos|#39);/g, val: "'" }, + "cent" : { regex: /&(cent|#162);/g, val: "¢" }, + "pound" : { regex: /&(pound|#163);/g, val: "£" }, + "yen" : { regex: /&(yen|#165);/g, val: "¥" }, + "euro" : { regex: /&(euro|#8364);/g, val: "€" }, + "copyright" : { regex: /&(copy|#169);/g, val: "©" }, + "reg" : { regex: /&(reg|#174);/g, val: "®" }, + "inr" : { regex: /&(inr|#8377);/g, val: "₹" }, + "num_dec": { regex: /&#([0-9]{1,7});/g, val : (_, str) => String.fromCharCode(Number.parseInt(str, 10)) }, + "num_hex": { regex: /&#x([0-9a-fA-F]{1,6});/g, val : (_, str) => String.fromCharCode(Number.parseInt(str, 16)) }, +}; +export default class EntitiesParser{ + constructor(replaceHtmlEntities) { + this.replaceHtmlEntities = replaceHtmlEntities; + this.docTypeEntities = {}; + this.lastEntities = { + "apos" : { regex: /&(apos|#39|#x27);/g, val : "'"}, + "gt" : { regex: /&(gt|#62|#x3E);/g, val : ">"}, + "lt" : { regex: /&(lt|#60|#x3C);/g, val : "<"}, + "quot" : { regex: /&(quot|#34|#x22);/g, val : "\""}, + }; + } + + addExternalEntities(externalEntities){ + const entKeys = Object.keys(externalEntities); + for (let i = 0; i < entKeys.length; i++) { + const ent = entKeys[i]; + this.addExternalEntity(ent,externalEntities[ent]) + } + } + addExternalEntity(key,val){ + validateEntityName(key); + if(val.indexOf("&") !== -1) { + reportWarning(`Entity ${key} is not added as '&' is found in value;`) + return; + }else{ + this.lastEntities[ent] = { + regex: new RegExp("&"+key+";","g"), + val : val + } + } + } + + addDocTypeEntities(entities){ + const entKeys = Object.keys(entities); + for (let i = 0; i < entKeys.length; i++) { + const ent = entKeys[i]; + this.docTypeEntities[ent] = { + regex: new RegExp("&"+ent+";","g"), + val : entities[ent] + } + } + } + + parse(val){ + return this.replaceEntitiesValue(val) + } + + /** + * 1. Replace DOCTYPE entities + * 2. Replace external entities + * 3. Replace HTML entities if asked + * @param {string} val + */ + replaceEntitiesValue(val){ + if(typeof val === "string" && val.length > 0){ + for(let entityName in this.docTypeEntities){ + const entity = this.docTypeEntities[entityName]; + val = val.replace( entity.regx, entity.val); + } + for(let entityName in this.lastEntities){ + const entity = this.lastEntities[entityName]; + val = val.replace( entity.regex, entity.val); + } + if(this.replaceHtmlEntities){ + for(let entityName in htmlEntities){ + const entity = htmlEntities[entityName]; + val = val.replace( entity.regex, entity.val); + } + } + val = val.replace( ampEntity.regex, ampEntity.val); + } + return val; + } +}; + +//an entity name should not contains special characters that may be used in regex +//Eg !?\\\/[]$%{}^&*()<> +const specialChar = "!?\\\/[]$%{}^&*()<>|+"; + +function validateEntityName(name){ + for (let i = 0; i < specialChar.length; i++) { + const ch = specialChar[i]; + if(name.indexOf(ch) !== -1) throw new Error(`Invalid character ${ch} in entity name`); + } + return name; +} diff --git a/node_modules/fast-xml-parser/src/v6/OptionsBuilder.js b/node_modules/fast-xml-parser/src/v6/OptionsBuilder.js new file mode 100755 index 00000000..b245166d --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/OptionsBuilder.js @@ -0,0 +1,61 @@ + +import {JsObjOutputBuilder} from './OutputBuilders/JsObjBuilder.js'; + +export const defaultOptions = { + preserveOrder: false, + removeNSPrefix: false, // remove NS from tag name or attribute name if true + //ignoreRootElement : false, + stopNodes: [], //nested tags will not be parsed even for errors + // isArray: () => false, //User will set it + htmlEntities: false, + // skipEmptyListItem: false + tags:{ + unpaired: [], + nameFor:{ + cdata: false, + comment: false, + text: '#text' + }, + separateTextProperty: false, + }, + attributes:{ + ignore: false, + booleanType: true, + entities: true, + }, + + // select: ["img[src]"], + // stop: ["anim", "[ads]"] + only: [], // rest tags will be skipped. It will result in flat array + hierarchy: false, //will be used when a particular tag is set to be parsed. + skip: [], // will be skipped from parse result. on('skip') will be triggered + + select: [], // on('select', tag => tag ) will be called if match + stop: [], //given tagPath will not be parsed. innerXML will be set as string value + OutputBuilder: new JsObjOutputBuilder(), +}; + +export const buildOptions = function(options) { + const finalOptions = { ... defaultOptions}; + copyProperties(finalOptions,options) + return finalOptions; +}; + +function copyProperties(target, source) { + for (let key in source) { + if (source.hasOwnProperty(key)) { + if (key === 'OutputBuilder') { + target[key] = source[key]; + }else if (typeof source[key] === 'object' && !Array.isArray(source[key])) { + // Recursively copy nested properties + if (typeof target[key] === 'undefined') { + target[key] = {}; + } + copyProperties(target[key], source[key]); + } else { + // Copy non-nested properties + target[key] = source[key]; + } + } + } +} diff --git a/node_modules/fast-xml-parser/src/v6/OutputBuilders/BaseOutputBuilder.js b/node_modules/fast-xml-parser/src/v6/OutputBuilders/BaseOutputBuilder.js new file mode 100644 index 00000000..8f9ce8d7 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/OutputBuilders/BaseOutputBuilder.js @@ -0,0 +1,69 @@ +export default class BaseOutputBuilder{ + constructor(){ + // this.attributes = {}; + } + + addAttribute(name, value){ + if(this.options.onAttribute){ + //TODO: better to pass tag path + const v = this.options.onAttribute(name, value, this.tagName); + if(v) this.attributes[v.name] = v.value; + }else{ + name = this.options.attributes.prefix + name + this.options.attributes.suffix; + this.attributes[name] = this.parseValue(value, this.options.attributes.valueParsers); + } + } + + /** + * parse value by chain of parsers + * @param {string} val + * @returns {any} parsed value if matching parser found + */ + parseValue = function(val, valParsers){ + for (let i = 0; i < valParsers.length; i++) { + let valParser = valParsers[i]; + if(typeof valParser === "string"){ + valParser = this.registeredParsers[valParser]; + } + if(valParser){ + val = valParser.parse(val); + } + } + return val; + } + + /** + * To add a nested empty tag. + * @param {string} key + * @param {any} val + */ + _addChild(key, val){} + + /** + * skip the comment if property is not set + */ + addComment(text){ + if(this.options.nameFor.comment) + this._addChild(this.options.nameFor.comment, text); + } + + //store CDATA separately if property is set + //otherwise add to tag's value + addCdata(text){ + if (this.options.nameFor.cdata) { + this._addChild(this.options.nameFor.cdata, text); + } else { + this.addRawValue(text || ""); + } + } + + addRawValue = text => this.addValue(text); + + addDeclaration(){ + if(!this.options.declaration){ + }else{ + this.addPi("?xml"); + } + this.attributes = {} + } +} diff --git a/node_modules/fast-xml-parser/src/v6/OutputBuilders/JsArrBuilder.js b/node_modules/fast-xml-parser/src/v6/OutputBuilders/JsArrBuilder.js new file mode 100644 index 00000000..b9c6e65d --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/OutputBuilders/JsArrBuilder.js @@ -0,0 +1,103 @@ +import {buildOptions,registerCommonValueParsers} from './ParserOptionsBuilder.js'; + +export default class OutputBuilder{ + constructor(options){ + this.options = buildOptions(options); + this.registeredParsers = registerCommonValueParsers(this.options); + } + + registerValueParser(name,parserInstance){//existing name will override the parser without warning + this.registeredParsers[name] = parserInstance; + } + + getInstance(parserOptions){ + return new JsArrBuilder(parserOptions, this.options, this.registeredParsers); + } +} + +const rootName = '!js_arr'; +import BaseOutputBuilder from './BaseOutputBuilder.js'; + +class JsArrBuilder extends BaseOutputBuilder{ + + constructor(parserOptions, options,registeredParsers) { + super(); + this.tagsStack = []; + this.parserOptions = parserOptions; + this.options = options; + this.registeredParsers = registeredParsers; + + this.root = new Node(rootName); + this.currentNode = this.root; + this.attributes = {}; + } + + addTag(tag){ + //when a new tag is added, it should be added as child of current node + //TODO: shift this check to the parser + if(tag.name === "__proto__") tag.name = "#__proto__"; + + this.tagsStack.push(this.currentNode); + this.currentNode = new Node(tag.name, this.attributes); + this.attributes = {}; + } + + /** + * Check if the node should be added by checking user's preference + * @param {Node} node + * @returns boolean: true if the node should not be added + */ + closeTag(){ + const node = this.currentNode; + this.currentNode = this.tagsStack.pop(); //set parent node in scope + if(this.options.onClose !== undefined){ + //TODO TagPathMatcher + const resultTag = this.options.onClose(node, + new TagPathMatcher(this.tagsStack,node)); + + if(resultTag) return; + } + this.currentNode.child.push(node); //to parent node + } + + //Called by parent class methods + _addChild(key, val){ + // if(key === "__proto__") tagName = "#__proto__"; + this.currentNode.child.push( {[key]: val }); + // this.currentNode.leafType = false; + } + + /** + * Add text value child node + * @param {string} text + */ + addValue(text){ + this.currentNode.child.push( {[this.options.nameFor.text]: this.parseValue(text, this.options.tags.valueParsers) }); + } + + addPi(name){ + //TODO: set pi flag + if(!this.options.ignorePiTags){ + const node = new Node(name, this.attributes); + this.currentNode[":@"] = this.attributes; + this.currentNode.child.push(node); + } + this.attributes = {}; + } + getOutput(){ + return this.root.child[0]; + } +} + + + +class Node{ + constructor(tagname, attributes){ + this.tagname = tagname; + this.child = []; //nested tags, text, cdata, comments + if(attributes && Object.keys(attributes).length > 0) + this[":@"] = attributes; + } +} + +module.exports = OutputBuilder; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v6/OutputBuilders/JsMinArrBuilder.js b/node_modules/fast-xml-parser/src/v6/OutputBuilders/JsMinArrBuilder.js new file mode 100644 index 00000000..be96ebfe --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/OutputBuilders/JsMinArrBuilder.js @@ -0,0 +1,100 @@ +import {buildOptions,registerCommonValueParsers} from"./ParserOptionsBuilder"; + +export default class OutputBuilder{ + constructor(options){ + this.options = buildOptions(options); + this.registeredParsers = registerCommonValueParsers(this.options); + } + + registerValueParser(name,parserInstance){//existing name will override the parser without warning + this.registeredParsers[name] = parserInstance; + } + + getInstance(parserOptions){ + return new JsMinArrBuilder(parserOptions, this.options, this.registeredParsers); + } +} + +import BaseOutputBuilder from "./BaseOutputBuilder.js"; +const rootName = '^'; + +class JsMinArrBuilder extends BaseOutputBuilder{ + + constructor(parserOptions, options,registeredParsers) { + super(); + this.tagsStack = []; + this.parserOptions = parserOptions; + this.options = options; + this.registeredParsers = registeredParsers; + + this.root = {[rootName]: []}; + this.currentNode = this.root; + this.currentNodeTagName = rootName; + this.attributes = {}; + } + + addTag(tag){ + //when a new tag is added, it should be added as child of current node + //TODO: shift this check to the parser + if(tag.name === "__proto__") tag.name = "#__proto__"; + + this.tagsStack.push([this.currentNodeTagName,this.currentNode]); //this.currentNode is parent node here + this.currentNodeTagName = tag.name; + this.currentNode = { [tag.name]:[]} + if(Object.keys(this.attributes).length > 0){ + this.currentNode[":@"] = this.attributes; + this.attributes = {}; + } + } + + /** + * Check if the node should be added by checking user's preference + * @param {Node} node + * @returns boolean: true if the node should not be added + */ + closeTag(){ + const node = this.currentNode; + const nodeName = this.currentNodeTagName; + const arr = this.tagsStack.pop(); //set parent node in scope + this.currentNodeTagName = arr[0]; + this.currentNode = arr[1]; + + if(this.options.onClose !== undefined){ + //TODO TagPathMatcher + const resultTag = this.options.onClose(node, + new TagPathMatcher(this.tagsStack,node)); + + if(resultTag) return; + } + this.currentNode[this.currentNodeTagName].push(node); //to parent node + } + + //Called by parent class methods + _addChild(key, val){ + // if(key === "__proto__") tagName = "#__proto__"; + this.currentNode.push( {[key]: val }); + // this.currentNode.leafType = false; + } + + /** + * Add text value child node + * @param {string} text + */ + addValue(text){ + this.currentNode[this.currentNodeTagName].push( {[this.options.nameFor.text]: this.parseValue(text, this.options.tags.valueParsers) }); + } + + addPi(name){ + if(!this.options.ignorePiTags){ + const node = { [name]:[]} + if(this.attributes){ + node[":@"] = this.attributes; + } + this.currentNode.push(node); + } + this.attributes = {}; + } + getOutput(){ + return this.root[rootName]; + } +} diff --git a/node_modules/fast-xml-parser/src/v6/OutputBuilders/JsObjBuilder.js b/node_modules/fast-xml-parser/src/v6/OutputBuilders/JsObjBuilder.js new file mode 100644 index 00000000..789a42bd --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/OutputBuilders/JsObjBuilder.js @@ -0,0 +1,154 @@ + + +import {buildOptions,registerCommonValueParsers} from './ParserOptionsBuilder.js'; + +export default class OutputBuilder{ + constructor(builderOptions){ + this.options = buildOptions(builderOptions); + this.registeredParsers = registerCommonValueParsers(this.options); + } + + registerValueParser(name,parserInstance){//existing name will override the parser without warning + this.registeredParsers[name] = parserInstance; + } + + getInstance(parserOptions){ + return new JsObjBuilder(parserOptions, this.options, this.registeredParsers); + } +} + +import BaseOutputBuilder from './BaseOutputBuilder.js'; +const rootName = '^'; + +class JsObjBuilder extends BaseOutputBuilder{ + + constructor(parserOptions, builderOptions,registeredParsers) { + super(); + //hold the raw detail of a tag and sequence with reference to the output + this.tagsStack = []; + this.parserOptions = parserOptions; + this.options = builderOptions; + this.registeredParsers = registeredParsers; + + this.root = {}; + this.parent = this.root; + this.tagName = rootName; + this.value = {}; + this.textValue = ""; + this.attributes = {}; + } + + addTag(tag){ + + let value = ""; + if( !isEmpty(this.attributes)){ + value = {}; + if(this.options.attributes.groupBy){ + value[this.options.attributes.groupBy] = this.attributes; + }else{ + value = this.attributes; + } + } + + this.tagsStack.push([this.tagName, this.textValue, this.value]); //parent tag, parent text value, parent tag value (jsobj) + this.tagName = tag.name; + this.value = value; + this.textValue = ""; + this.attributes = {}; + } + + /** + * Check if the node should be added by checking user's preference + * @param {Node} node + * @returns boolean: true if the node should not be added + */ + closeTag(){ + const tagName = this.tagName; + let value = this.value; + let textValue = this.textValue; + + //update tag text value + if(typeof value !== "object" && !Array.isArray(value)){ + value = this.parseValue(textValue.trim(), this.options.tags.valueParsers); + }else if(textValue.length > 0){ + value[this.options.nameFor.text] = this.parseValue(textValue.trim(), this.options.tags.valueParsers); + } + + + let resultTag= { + tagName: tagName, + value: value + }; + + if(this.options.onTagClose !== undefined){ + //TODO TagPathMatcher + resultTag = this.options.onClose(tagName, value, this.textValue, new TagPathMatcher(this.tagsStack,node)); + + if(!resultTag) return; + } + + //set parent node in scope + let arr = this.tagsStack.pop(); + let parentTag = arr[2]; + parentTag=this._addChildTo(resultTag.tagName, resultTag.value, parentTag); + + this.tagName = arr[0]; + this.textValue = arr[1]; + this.value = parentTag; + } + + _addChild(key, val){ + if(typeof this.value === "string"){ + this.value = { [this.options.nameFor.text] : this.value }; + } + + this._addChildTo(key, val, this.value); + // this.currentNode.leafType = false; + this.attributes = {}; + } + + _addChildTo(key, val, node){ + if(typeof node === 'string') node = {}; + if(!node[key]){ + node[key] = val; + }else{ //Repeated + if(!Array.isArray(node[key])){ //but not stored as array + node[key] = [node[key]]; + } + node[key].push(val); + } + return node; + } + + + /** + * Add text value child node + * @param {string} text + */ + addValue(text){ + //TODO: use bytes join + if(this.textValue.length > 0) this.textValue += " " + text; + else this.textValue = text; + } + + addPi(name){ + let value = ""; + if( !isEmpty(this.attributes)){ + value = {}; + if(this.options.attributes.groupBy){ + value[this.options.attributes.groupBy] = this.attributes; + }else{ + value = this.attributes; + } + } + this._addChild(name, value); + + } + getOutput(){ + return this.value; + } +} + +function isEmpty(obj) { + return Object.keys(obj).length === 0; +} diff --git a/node_modules/fast-xml-parser/src/v6/OutputBuilders/ParserOptionsBuilder.js b/node_modules/fast-xml-parser/src/v6/OutputBuilders/ParserOptionsBuilder.js new file mode 100644 index 00000000..fa0e84ef --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/OutputBuilders/ParserOptionsBuilder.js @@ -0,0 +1,94 @@ +import trimParser from "../valueParsers/trim"; +import booleanParser from "../valueParsers/booleanParser"; +import currencyParser from "../valueParsers/currency"; +import numberParser from "../valueParsers/number"; + +const defaultOptions={ + nameFor:{ + text: "#text", + comment: "", + cdata: "", + }, + // onTagClose: () => {}, + // onAttribute: () => {}, + piTag: false, + declaration: false, //"?xml" + tags: { + valueParsers: [ + // "trim", + // "boolean", + // "number", + // "currency", + // "date", + ] + }, + attributes:{ + prefix: "@_", + suffix: "", + groupBy: "", + + valueParsers: [ + // "trim", + // "boolean", + // "number", + // "currency", + // "date", + ] + }, + dataType:{ + + } +} + +//TODO +const withJoin = ["trim","join", /*"entities",*/"number","boolean","currency"/*, "date"*/] +const withoutJoin = ["trim", /*"entities",*/"number","boolean","currency"/*, "date"*/] + +export function buildOptions(options){ + //clone + const finalOptions = { ... defaultOptions}; + + //add config missed in cloning + finalOptions.tags.valueParsers.push(...withJoin) + if(!this.preserveOrder) + finalOptions.tags.valueParsers.push(...withoutJoin); + + //add config missed in cloning + finalOptions.attributes.valueParsers.push(...withJoin) + + //override configuration + copyProperties(finalOptions,options); + return finalOptions; +} + +function copyProperties(target, source) { + for (let key in source) { + if (source.hasOwnProperty(key)) { + if (typeof source[key] === 'object' && !Array.isArray(source[key])) { + // Recursively copy nested properties + if (typeof target[key] === 'undefined') { + target[key] = {}; + } + copyProperties(target[key], source[key]); + } else { + // Copy non-nested properties + target[key] = source[key]; + } + } + } +} + +export function registerCommonValueParsers(options){ + return { + "trim": new trimParser(), + // "join": this.entityParser.parse, + "boolean": new booleanParser(), + "number": new numberParser({ + hex: true, + leadingZeros: true, + eNotation: true + }), + "currency": new currencyParser(), + // "date": this.entityParser.parse, + } +} diff --git a/node_modules/fast-xml-parser/src/v6/Report.js b/node_modules/fast-xml-parser/src/v6/Report.js new file mode 100644 index 00000000..e69de29b diff --git a/node_modules/fast-xml-parser/src/v6/TagPath.js b/node_modules/fast-xml-parser/src/v6/TagPath.js new file mode 100644 index 00000000..98148c78 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/TagPath.js @@ -0,0 +1,81 @@ +export default class TagPath{ + constructor(pathStr){ + let text = ""; + let tName = ""; + let pos; + let aName = ""; + let aVal = ""; + this.stack = [] + + for (let i = 0; i < pathStr.length; i++) { + let ch = pathStr[i]; + if(ch === " ") { + if(text.length === 0) continue; + tName = text; text = ""; + }else if(ch === "["){ + if(tName.length === 0){ + tName = text; text = ""; + } + i++; + for (; i < pathStr.length; i++) { + ch = pathStr[i]; + if(ch=== "=") continue; + else if(ch=== "]") {aName = text.trim(); text=""; break; i--;} + else if(ch === "'" || ch === '"'){ + let attrEnd = pathStr.indexOf(ch,i+1); + aVal = pathStr.substring(i+1, attrEnd); + i = attrEnd; + }else{ + text +=ch; + } + } + }else if(ch !== " " && text.length === 0 && tName.length > 0){//reading tagName + //save previous tag + this.stack.push(new TagPathNode(tName,pos,aName,aVal)); + text = ch; tName = ""; aName = ""; aVal = ""; + }else{ + text+=ch; + } + } + + //last tag in the path + if(tName.length >0 || text.length>0){ + this.stack.push(new TagPathNode(text||tName,pos,aName,aVal)); + } + } + + match(tagStack,node){ + if(this.stack[0].name !== "*"){ + if(this.stack.length !== tagStack.length +1) return false; + + //loop through tagPath and tagStack and match + for (let i = 0; i < this.tagStack.length; i++) { + if(!this.stack[i].match(tagStack[i])) return false; + } + } + if(!this.stack[this.stack.length - 1].match(node)) return false; + return true; + } +} + +class TagPathNode{ + constructor(name,position,attrName,attrVal){ + this.name = name; + this.position = position; + this.attrName = attrName, + this.attrVal = attrVal; + } + + match(node){ + let matching = true; + matching = node.name === this.name; + if(this.position) matching = node.position === this.position; + if(this.attrName) matching = node.attrs[this.attrName !== undefined]; + if(this.attrVal) matching = node.attrs[this.attrName !== this.attrVal]; + return matching; + } +} + +// console.log((new TagPath("* b[b]")).stack); +// console.log((new TagPath("a[a] b[b] c")).stack); +// console.log((new TagPath(" b [ b= 'cf sdadwa' ] a ")).stack); \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v6/TagPathMatcher.js b/node_modules/fast-xml-parser/src/v6/TagPathMatcher.js new file mode 100644 index 00000000..81104476 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/TagPathMatcher.js @@ -0,0 +1,13 @@ +import {TagPath} from './TagPath.js'; + +export default class TagPathMatcher{ + constructor(stack,node){ + this.stack = stack; + this.node= node; + } + + match(path){ + const tagPath = new TagPath(path); + return tagPath.match(this.stack, this.node); + } +} \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/v6/XMLParser.js b/node_modules/fast-xml-parser/src/v6/XMLParser.js new file mode 100755 index 00000000..0da7059d --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/XMLParser.js @@ -0,0 +1,83 @@ +import { buildOptions} from './OptionsBuilder.js'; +import Xml2JsParser from './Xml2JsParser.js'; + +export default class XMLParser{ + + constructor(options){ + this.externalEntities = {}; + this.options = buildOptions(options); + // console.log(this.options) + } + /** + * Parse XML data string to JS object + * @param {string|Buffer} xmlData + * @param {boolean|Object} validationOption + */ + parse(xmlData){ + if(Array.isArray(xmlData) && xmlData.byteLength !== undefined){ + return this.parse(xmlData); + }else if( xmlData.toString){ + xmlData = xmlData.toString(); + }else{ + throw new Error("XML data is accepted in String or Bytes[] form.") + } + // if( validationOption){ + // if(validationOption === true) validationOption = {}; //validate with default options + + // const result = validator.validate(xmlData, validationOption); + // if (result !== true) { + // throw Error( `${result.err.msg}:${result.err.line}:${result.err.col}` ) + // } + // } + const parser = new Xml2JsParser(this.options); + parser.entityParser.addExternalEntities(this.externalEntities); + return parser.parse(xmlData); + } + /** + * Parse XML data buffer to JS object + * @param {string|Buffer} xmlData + * @param {boolean|Object} validationOption + */ + parseBytesArr(xmlData){ + if(Array.isArray(xmlData) && xmlData.byteLength !== undefined){ + }else{ + throw new Error("XML data is accepted in Bytes[] form.") + } + const parser = new Xml2JsParser(this.options); + parser.entityParser.addExternalEntities(this.externalEntities); + return parser.parseBytesArr(xmlData); + } + /** + * Parse XML data stream to JS object + * @param {fs.ReadableStream} xmlDataStream + */ + parseStream(xmlDataStream){ + if(!isStream(xmlDataStream)) throw new Error("FXP: Invalid stream input"); + + const orderedObjParser = new Xml2JsParser(this.options); + orderedObjParser.entityParser.addExternalEntities(this.externalEntities); + return orderedObjParser.parseStream(xmlDataStream); + } + + /** + * Add Entity which is not by default supported by this library + * @param {string} key + * @param {string} value + */ + addEntity(key, value){ + if(value.indexOf("&") !== -1){ + throw new Error("Entity value can't have '&'") + }else if(key.indexOf("&") !== -1 || key.indexOf(";") !== -1){ + throw new Error("An entity must be set without '&' and ';'. Eg. use '#xD' for ' '") + }else if(value === "&"){ + throw new Error("An entity with value '&' is not permitted"); + }else{ + this.externalEntities[key] = value; + } + } +} + +function isStream(stream){ + if(stream && typeof stream.read === "function" && typeof stream.on === "function" && typeof stream.readableEnded === "boolean") return true; + return false; +} diff --git a/node_modules/fast-xml-parser/src/v6/Xml2JsParser.js b/node_modules/fast-xml-parser/src/v6/Xml2JsParser.js new file mode 100644 index 00000000..bd622653 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/Xml2JsParser.js @@ -0,0 +1,235 @@ +import StringSource from './inputSource/StringSource.js'; +import BufferSource from './inputSource/BufferSource.js'; +import {readTagExp,readClosingTagName} from './XmlPartReader.js'; +import {readComment, readCdata,readDocType,readPiTag} from './XmlSpecialTagsReader.js'; +import TagPath from './TagPath.js'; +import TagPathMatcher from './TagPathMatcher.js'; +import EntitiesParser from './EntitiesParser.js'; + +//To hold the data of current tag +//This is usually used to compare jpath expression against current tag +class TagDetail{ + constructor(name){ + this.name = name; + this.position = 0; + // this.attributes = {}; + } +} + +export default class Xml2JsParser { + constructor(options) { + this.options = options; + + this.currentTagDetail = null; + this.tagTextData = ""; + this.tagsStack = []; + this.entityParser = new EntitiesParser(options.htmlEntities); + this.stopNodes = []; + for (let i = 0; i < this.options.stopNodes.length; i++) { + this.stopNodes.push(new TagPath(this.options.stopNodes[i])); + } + } + + parse(strData) { + this.source = new StringSource(strData); + this.parseXml(); + return this.outputBuilder.getOutput(); + } + parseBytesArr(data) { + this.source = new BufferSource(data ); + this.parseXml(); + return this.outputBuilder.getOutput(); + } + + parseXml() { + //TODO: Separate TagValueParser as separate class. So no scope issue in node builder class + + //OutputBuilder should be set in XML Parser + this.outputBuilder = this.options.OutputBuilder.getInstance(this.options); + this.root = { root: true}; + this.currentTagDetail = this.root; + + while(this.source.canRead()){ + let ch = this.source.readCh(); + if (ch === "") break; + + if(ch === "<"){//tagStart + let nextChar = this.source.readChAt(0); + if (nextChar === "" ) throw new Error("Unexpected end of source"); + + + if(nextChar === "!" || nextChar === "?"){ + this.source.updateBufferBoundary(); + //previously collected text should be added to current node + this.addTextNode(); + + this.readSpecialTag(nextChar);// Read DOCTYPE, comment, CDATA, PI tag + }else if(nextChar === "/"){ + this.source.updateBufferBoundary(); + this.readClosingTag(); + // console.log(this.source.buffer.length, this.source.readable); + // console.log(this.tagsStack.length); + }else{//opening tag + this.readOpeningTag(); + } + }else{ + this.tagTextData += ch; + } + }//End While loop + if(this.tagsStack.length > 0 || ( this.tagTextData !== "undefined" && this.tagTextData.trimEnd().length > 0) ) throw new Error("Unexpected data in the end of document"); + } + + /** + * read closing paired tag. Set parent tag in scope. + * skip a node on user's choice + */ + readClosingTag(){ + const tagName = this.processTagName(readClosingTagName(this.source)); + // console.log(tagName, this.tagsStack.length); + this.validateClosingTag(tagName); + // All the text data collected, belongs to current tag. + if(!this.currentTagDetail.root) this.addTextNode(); + this.outputBuilder.closeTag(); + // Since the tag is closed now, parent tag comes in scope + this.currentTagDetail = this.tagsStack.pop(); + } + + validateClosingTag(tagName){ + // This can't be unpaired tag, or a stop tag. + if(this.isUnpaired(tagName) || this.isStopNode(tagName)) throw new Error(`Unexpected closing tag '${tagName}'`); + // This must match with last opening tag + else if(tagName !== this.currentTagDetail.name) + throw new Error(`Unexpected closing tag '${tagName}' expecting '${this.currentTagDetail.name}'`) + } + + /** + * Read paired, unpaired, self-closing, stop and special tags. + * Create a new node + * Push paired tag in stack. + */ + readOpeningTag(){ + //save previously collected text data to current node + this.addTextNode(); + + //create new tag + let tagExp = readTagExp(this, ">" ); + + // process and skip from tagsStack For unpaired tag, self closing tag, and stop node + const tagDetail = new TagDetail(tagExp.tagName); + if(this.isUnpaired(tagExp.tagName)) { + //TODO: this will lead 2 extra stack operation + this.outputBuilder.addTag(tagDetail); + this.outputBuilder.closeTag(); + } else if(tagExp.selfClosing){ + this.outputBuilder.addTag(tagDetail); + this.outputBuilder.closeTag(); + } else if(this.isStopNode(this.currentTagDetail)){ + // TODO: let's user set a stop node boundary detector for complex contents like script tag + //TODO: pass tag name only to avoid string operations + const content = source.readUptoCloseTag(` 0){ + //TODO: shift parsing to output builder + + this.outputBuilder.addValue(this.replaceEntities(this.tagTextData)); + } + this.tagTextData = ""; + } + // } + } + + processAttrName(name){ + if(name === "__proto__") name = "#__proto__"; + name = resolveNameSpace(name, this.removeNSPrefix); + return name; + } + + processTagName(name){ + if(name === "__proto__") name = "#__proto__"; + name = resolveNameSpace(name, this.removeNSPrefix); + return name; + } + + /** + * Generate tags path from tagsStack + */ + tagsPath(tagName){ + //TODO: return TagPath Object. User can call match method with path + return ""; + } + + isUnpaired(tagName){ + return this.options.tags.unpaired.indexOf(tagName) !== -1; + } + + /** + * valid expressions are + * tag nested + * * nested + * tag nested[attribute] + * tag nested[attribute=""] + * tag nested[attribute!=""] + * tag nested:0 //for future + * @param {string} tagName + * @returns + */ + isStopNode(node){ + for (let i = 0; i < this.stopNodes.length; i++) { + const givenPath = this.stopNodes[i]; + if(givenPath.match(this.tagsStack, node)) return true; + } + return false + } + + replaceEntities(text){ + //TODO: if option is set then replace entities + return this.entityParser.parse(text) + } +} + +function resolveNameSpace(name, removeNSPrefix) { + if (removeNSPrefix) { + const parts = name.split(':'); + if(parts.length === 2){ + if (parts[0] === 'xmlns') return ''; + else return parts[1]; + }else reportError(`Multiple namespaces ${name}`) + } + return name; +} diff --git a/node_modules/fast-xml-parser/src/v6/XmlPartReader.js b/node_modules/fast-xml-parser/src/v6/XmlPartReader.js new file mode 100644 index 00000000..61c57ec8 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/XmlPartReader.js @@ -0,0 +1,210 @@ +'use strict'; + +/** + * find paired tag for a stop node + * @param {string} xmlDoc + * @param {string} tagName + * @param {number} i : start index + */ +export function readStopNode(xmlDoc, tagName, i){ + const startIndex = i; + // Starting at 1 since we already have an open tag + let openTagCount = 1; + + for (; i < xmlDoc.length; i++) { + if( xmlDoc[i] === "<"){ + if (xmlDoc[i+1] === "/") {//close tag + const closeIndex = findSubStrIndex(xmlDoc, ">", i, `${tagName} is not closed`); + let closeTagName = xmlDoc.substring(i+2,closeIndex).trim(); + if(closeTagName === tagName){ + openTagCount--; + if (openTagCount === 0) { + return { + tagContent: xmlDoc.substring(startIndex, i), + i : closeIndex + } + } + } + i=closeIndex; + } else if(xmlDoc[i+1] === '?') { + const closeIndex = findSubStrIndex(xmlDoc, "?>", i+1, "StopNode is not closed.") + i=closeIndex; + } else if(xmlDoc.substr(i + 1, 3) === '!--') { + const closeIndex = findSubStrIndex(xmlDoc, "-->", i+3, "StopNode is not closed.") + i=closeIndex; + } else if(xmlDoc.substr(i + 1, 2) === '![') { + const closeIndex = findSubStrIndex(xmlDoc, "]]>", i, "StopNode is not closed.") - 2; + i=closeIndex; + } else { + const tagData = readTagExp(xmlDoc, i, '>') + + if (tagData) { + const openTagName = tagData && tagData.tagName; + if (openTagName === tagName && tagData.tagExp[tagData.tagExp.length-1] !== "/") { + openTagCount++; + } + i=tagData.closeIndex; + } + } + } + }//end for loop +} + +/** + * Read closing tag name + * @param {Source} source + * @returns tag name + */ +export function readClosingTagName(source){ + let text = ""; //temporary data + while(source.canRead()){ + let ch = source.readCh(); + // if (ch === null || ch === undefined) break; + // source.updateBuffer(); + + if (ch === ">") return text.trimEnd(); + else text += ch; + } + throw new Error(`Unexpected end of source. Reading '${substr}'`); +} + +/** + * Read XML tag and build attributes map + * This function can be used to read normal tag, pi tag. + * This function can't be used to read comment, CDATA, DOCTYPE. + * Eg + * @param {string} xmlDoc + * @param {number} startIndex starting index + * @returns tag expression includes tag name & attribute string + */ +export function readTagExp(parser) { + let inSingleQuotes = false; + let inDoubleQuotes = false; + let i; + let EOE = false; + + for (i = 0; parser.source.canRead(i); i++) { + const char = parser.source.readChAt(i); + + if (char === "'" && !inDoubleQuotes) { + inSingleQuotes = !inSingleQuotes; + } else if (char === '"' && !inSingleQuotes) { + inDoubleQuotes = !inDoubleQuotes; + } else if (char === '>' && !inSingleQuotes && !inDoubleQuotes) { + // If not inside quotes, stop reading at '>' + EOE = true; + break; + } + + } + if(inSingleQuotes || inDoubleQuotes){ + throw new Error("Invalid attribute expression. Quote is not properly closed"); + }else if(!EOE) throw new Error("Unexpected closing of source. Waiting for '>'"); + + + const exp = parser.source.readStr(i); + parser.source.updateBufferBoundary(i + 1); + return buildTagExpObj(exp, parser) +} + +export function readPiExp(parser) { + let inSingleQuotes = false; + let inDoubleQuotes = false; + let i; + let EOE = false; + + for (i = 0; parser.source.canRead(i) ; i++) { + const currentChar = parser.source.readChAt(i); + const nextChar = parser.source.readChAt(i+1); + + if (currentChar === "'" && !inDoubleQuotes) { + inSingleQuotes = !inSingleQuotes; + } else if (currentChar === '"' && !inSingleQuotes) { + inDoubleQuotes = !inDoubleQuotes; + } + + if (!inSingleQuotes && !inDoubleQuotes) { + if (currentChar === '?' && nextChar === '>') { + EOE = true; + break; // Exit the loop when '?>' is found + } + } + } + if(inSingleQuotes || inDoubleQuotes){ + throw new Error("Invalid attribute expression. Quote is not properly closed in PI tag expression"); + }else if(!EOE) throw new Error("Unexpected closing of source. Waiting for '?>'"); + + if(!parser.options.attributes.ignore){ + //TODO: use regex to verify attributes if not set to ignore + } + + const exp = parser.source.readStr(i); + parser.source.updateBufferBoundary(i + 1); + return buildTagExpObj(exp, parser) +} + +function buildTagExpObj(exp, parser){ + const tagExp = { + tagName: "", + selfClosing: false + }; + let attrsExp = ""; + + // Check for self-closing tag before setting the name + if(exp[exp.length -1] === "/") { + tagExp.selfClosing = true; + exp = exp.slice(0, -1); // Remove the trailing slash + } + + //separate tag name + let i = 0; + for (; i < exp.length; i++) { + const char = exp[i]; + if(char === " "){ + tagExp.tagName = exp.substring(0, i); + attrsExp = exp.substring(i + 1); + break; + } + } + //only tag + if(tagExp.tagName.length === 0 && i === exp.length)tagExp.tagName = exp; + + tagExp.tagName = tagExp.tagName.trimEnd(); + + if(!parser.options.attributes.ignore && attrsExp.length > 0){ + parseAttributesExp(attrsExp,parser) + } + + return tagExp; +} + +const attrsRegx = new RegExp('([^\\s=]+)\\s*(=\\s*([\'"])([\\s\\S]*?)\\3)?', 'gm'); + +function parseAttributesExp(attrStr, parser) { + const matches = getAllMatches(attrStr, attrsRegx); + const len = matches.length; //don't make it inline + for (let i = 0; i < len; i++) { + let attrName = parser.processAttrName(matches[i][1]); + let attrVal = parser.replaceEntities(matches[i][4] || true); + + parser.outputBuilder.addAttribute(attrName, attrVal); + } +} + + +const getAllMatches = function(string, regex) { + const matches = []; + let match = regex.exec(string); + while (match) { + const allmatches = []; + allmatches.startIndex = regex.lastIndex - match[0].length; + const len = match.length; + for (let index = 0; index < len; index++) { + allmatches.push(match[index]); + } + matches.push(allmatches); + match = regex.exec(string); + } + return matches; +}; + diff --git a/node_modules/fast-xml-parser/src/v6/XmlSpecialTagsReader.js b/node_modules/fast-xml-parser/src/v6/XmlSpecialTagsReader.js new file mode 100644 index 00000000..330e0a46 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/XmlSpecialTagsReader.js @@ -0,0 +1,111 @@ +import {readPiExp} from './XmlPartReader.js'; + +export function readCdata(parser){ + //"); + parser.outputBuilder.addCdata(text); +} +export function readPiTag(parser){ + //"); + if(!tagExp) throw new Error("Invalid Pi Tag expression."); + + if (tagExp.tagName === "?xml") {//TODO: test if tagName is just xml + parser.outputBuilder.addDeclaration(); + } else { + parser.outputBuilder.addPi("?"+tagExp.tagName); + } +} + +export function readComment(parser){ + //"); + parser.outputBuilder.addComment(text); +} + +const DOCTYPE_tags = { + "EL":/^EMENT\s+([^\s>]+)\s+(ANY|EMPTY|\(.+\)\s*$)/m, + "AT":/^TLIST\s+[^\s]+\s+[^\s]+\s+[^\s]+\s+[^\s]+\s+$/m, + "NO":/^TATION.+$/m +} +export function readDocType(parser){ + //"); + const regx = DOCTYPE_tags[str]; + if(regx){ + const match = dTagExp.match(regx); + if(!match) throw new Error("Invalid DOCTYPE"); + }else throw new Error("Invalid DOCTYPE"); + } + }else if( ch === '>' && lastch === "]"){//end of doctype + return; + } + }else if( ch === '>'){//end of doctype + return; + }else if( ch === '['){ + hasBody = true; + }else{ + lastch = ch; + } + }//End While loop + +} + +function registerEntity(parser){ + //read Entity + let attrBoundary=""; + let name ="", val =""; + while(source.canRead()){ + let ch = source.readCh(); + + if(attrBoundary){ + if (ch === attrBoundary){ + val = text; + text = "" + } + }else if(ch === " " || ch === "\t"){ + if(!name){ + name = text.trimStart(); + text = ""; + } + }else if (ch === '"' || ch === "'") {//start of attrBoundary + attrBoundary = ch; + }else if(ch === ">"){ + parser.entityParser.addExternalEntity(name,val); + return; + }else{ + text+=ch; + } + } +} diff --git a/node_modules/fast-xml-parser/src/v6/inputSource/BufferSource.js b/node_modules/fast-xml-parser/src/v6/inputSource/BufferSource.js new file mode 100644 index 00000000..2c5d8b59 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/inputSource/BufferSource.js @@ -0,0 +1,116 @@ +const Constants = { + space: 32, + tab: 9 +} +export default class BufferSource{ + constructor(bytesArr){ + this.line = 1; + this.cols = 0; + this.buffer = bytesArr; + this.startIndex = 0; + } + + + + readCh() { + return String.fromCharCode(this.buffer[this.startIndex++]); + } + + readChAt(index) { + return String.fromCharCode(this.buffer[this.startIndex+index]); + } + + readStr(n,from){ + if(typeof from === "undefined") from = this.startIndex; + return this.buffer.slice(from, from + n).toString(); + } + + readUpto(stopStr) { + const inputLength = this.buffer.length; + const stopLength = stopStr.length; + const stopBuffer = Buffer.from(stopStr); + + for (let i = this.startIndex; i < inputLength; i++) { + let match = true; + for (let j = 0; j < stopLength; j++) { + if (this.buffer[i + j] !== stopBuffer[j]) { + match = false; + break; + } + } + + if (match) { + const result = this.buffer.slice(this.startIndex, i).toString(); + this.startIndex = i + stopLength; + return result; + } + } + + throw new Error(`Unexpected end of source. Reading '${stopStr}'`); +} + +readUptoCloseTag(stopStr) { //stopStr: "'){ //TODO: if it should be equivalent ASCII + match = 2; + //tag boundary found + // this.startIndex + } + }else{ + match = 1; + for (let j = 0; j < stopLength; j++) { + if (this.buffer[i + j] !== stopBuffer[j]) { + match = 0; + break; + } + } + } + if (match === 2) {//matched closing part + const result = this.buffer.slice(this.startIndex, stopIndex - 1 ).toString(); + this.startIndex = i + 1; + return result; + } + } + + throw new Error(`Unexpected end of source. Reading '${stopStr}'`); +} + + readFromBuffer(n, shouldUpdate) { + let ch; + if (n === 1) { + ch = this.buffer[this.startIndex]; + if (ch === 10) { + this.line++; + this.cols = 1; + } else { + this.cols++; + } + ch = String.fromCharCode(ch); + } else { + this.cols += n; + ch = this.buffer.slice(this.startIndex, this.startIndex + n).toString(); + } + if (shouldUpdate) this.updateBuffer(n); + return ch; + } + + updateBufferBoundary(n = 1) { //n: number of characters read + this.startIndex += n; + } + + canRead(n){ + n = n || this.startIndex; + return this.buffer.length - n + 1 > 0; + } + +} diff --git a/node_modules/fast-xml-parser/src/v6/inputSource/StringSource.js b/node_modules/fast-xml-parser/src/v6/inputSource/StringSource.js new file mode 100644 index 00000000..275889a3 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/inputSource/StringSource.js @@ -0,0 +1,121 @@ +const whiteSpaces = [" ", "\n", "\t"]; + + +export default class StringSource{ + constructor(str){ + this.line = 1; + this.cols = 0; + this.buffer = str; + //a boundary pointer to indicate where from the buffer dat should be read + // data before this pointer can be deleted to free the memory + this.startIndex = 0; + } + + readCh() { + return this.buffer[this.startIndex++]; + } + + readChAt(index) { + return this.buffer[this.startIndex+index]; + } + + readStr(n,from){ + if(typeof from === "undefined") from = this.startIndex; + return this.buffer.substring(from, from + n); + } + + readUpto(stopStr) { + const inputLength = this.buffer.length; + const stopLength = stopStr.length; + + for (let i = this.startIndex; i < inputLength; i++) { + let match = true; + for (let j = 0; j < stopLength; j++) { + if (this.buffer[i + j] !== stopStr[j]) { + match = false; + break; + } + } + + if (match) { + const result = this.buffer.substring(this.startIndex, i); + this.startIndex = i + stopLength; + return result; + } + } + + throw new Error(`Unexpected end of source. Reading '${stopStr}'`); + } + + readUptoCloseTag(stopStr) { //stopStr: "'){ + match = 2; + //tag boundary found + // this.startIndex + } + }else{ + match = 1; + for (let j = 0; j < stopLength; j++) { + if (this.buffer[i + j] !== stopStr[j]) { + match = 0; + break; + } + } + } + if (match === 2) {//matched closing part + const result = this.buffer.substring(this.startIndex, stopIndex - 1 ); + this.startIndex = i + 1; + return result; + } + } + + throw new Error(`Unexpected end of source. Reading '${stopStr}'`); + } + + readFromBuffer(n, updateIndex){ + let ch; + if(n===1){ + ch = this.buffer[this.startIndex]; + // if(ch === "\n") { + // this.line++; + // this.cols = 1; + // }else{ + // this.cols++; + // } + }else{ + ch = this.buffer.substring(this.startIndex, this.startIndex + n); + // if("".indexOf("\n") !== -1){ + // //TODO: handle the scenario when there are multiple lines + // //TODO: col should be set to number of chars after last '\n' + // // this.cols = 1; + // }else{ + // this.cols += n; + + // } + } + if(updateIndex) this.updateBufferBoundary(n); + return ch; + } + + //TODO: rename to updateBufferReadIndex + + updateBufferBoundary(n = 1) { //n: number of characters read + this.startIndex += n; + } + + canRead(n){ + n = n || this.startIndex; + return this.buffer.length - n + 1 > 0; + } + +} diff --git a/node_modules/fast-xml-parser/src/v6/valueParsers/EntitiesParser.js b/node_modules/fast-xml-parser/src/v6/valueParsers/EntitiesParser.js new file mode 100644 index 00000000..52b4203e --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/valueParsers/EntitiesParser.js @@ -0,0 +1,105 @@ +const ampEntity = { regex: /&(amp|#38|#x26);/g, val : "&"}; +const htmlEntities = { + "space": { regex: /&(nbsp|#160);/g, val: " " }, + // "lt" : { regex: /&(lt|#60);/g, val: "<" }, + // "gt" : { regex: /&(gt|#62);/g, val: ">" }, + // "amp" : { regex: /&(amp|#38);/g, val: "&" }, + // "quot" : { regex: /&(quot|#34);/g, val: "\"" }, + // "apos" : { regex: /&(apos|#39);/g, val: "'" }, + "cent" : { regex: /&(cent|#162);/g, val: "¢" }, + "pound" : { regex: /&(pound|#163);/g, val: "£" }, + "yen" : { regex: /&(yen|#165);/g, val: "¥" }, + "euro" : { regex: /&(euro|#8364);/g, val: "€" }, + "copyright" : { regex: /&(copy|#169);/g, val: "©" }, + "reg" : { regex: /&(reg|#174);/g, val: "®" }, + "inr" : { regex: /&(inr|#8377);/g, val: "₹" }, + "num_dec": { regex: /&#([0-9]{1,7});/g, val : (_, str) => String.fromCharCode(Number.parseInt(str, 10)) }, + "num_hex": { regex: /&#x([0-9a-fA-F]{1,6});/g, val : (_, str) => String.fromCharCode(Number.parseInt(str, 16)) }, +}; + +export default class EntitiesParser{ + constructor(replaceHtmlEntities) { + this.replaceHtmlEntities = replaceHtmlEntities; + this.docTypeEntities = {}; + this.lastEntities = { + "apos" : { regex: /&(apos|#39|#x27);/g, val : "'"}, + "gt" : { regex: /&(gt|#62|#x3E);/g, val : ">"}, + "lt" : { regex: /&(lt|#60|#x3C);/g, val : "<"}, + "quot" : { regex: /&(quot|#34|#x22);/g, val : "\""}, + }; + } + + addExternalEntities(externalEntities){ + const entKeys = Object.keys(externalEntities); + for (let i = 0; i < entKeys.length; i++) { + const ent = entKeys[i]; + this.addExternalEntity(ent,externalEntities[ent]) + } + } + addExternalEntity(key,val){ + validateEntityName(key); + if(val.indexOf("&") !== -1) { + reportWarning(`Entity ${key} is not added as '&' is found in value;`) + return; + }else{ + this.lastEntities[ent] = { + regex: new RegExp("&"+key+";","g"), + val : val + } + } + } + + addDocTypeEntities(entities){ + const entKeys = Object.keys(entities); + for (let i = 0; i < entKeys.length; i++) { + const ent = entKeys[i]; + this.docTypeEntities[ent] = { + regex: new RegExp("&"+ent+";","g"), + val : entities[ent] + } + } + } + + parse(val){ + return this.replaceEntitiesValue(val) + } + + /** + * 1. Replace DOCTYPE entities + * 2. Replace external entities + * 3. Replace HTML entities if asked + * @param {string} val + */ + replaceEntitiesValue(val){ + if(typeof val === "string" && val.length > 0){ + for(let entityName in this.docTypeEntities){ + const entity = this.docTypeEntities[entityName]; + val = val.replace( entity.regx, entity.val); + } + for(let entityName in this.lastEntities){ + const entity = this.lastEntities[entityName]; + val = val.replace( entity.regex, entity.val); + } + if(this.replaceHtmlEntities){ + for(let entityName in htmlEntities){ + const entity = htmlEntities[entityName]; + val = val.replace( entity.regex, entity.val); + } + } + val = val.replace( ampEntity.regex, ampEntity.val); + } + return val; + } +}; + +//an entity name should not contains special characters that may be used in regex +//Eg !?\\\/[]$%{}^&*()<> +const specialChar = "!?\\\/[]$%{}^&*()<>|+"; + +function validateEntityName(name){ + for (let i = 0; i < specialChar.length; i++) { + const ch = specialChar[i]; + if(name.indexOf(ch) !== -1) throw new Error(`Invalid character ${ch} in entity name`); + } + return name; +} diff --git a/node_modules/fast-xml-parser/src/v6/valueParsers/booleanParser.js b/node_modules/fast-xml-parser/src/v6/valueParsers/booleanParser.js new file mode 100644 index 00000000..bc8f8064 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/valueParsers/booleanParser.js @@ -0,0 +1,22 @@ +export default class boolParser{ + constructor(trueList, falseList){ + if(trueList) + this.trueList = trueList; + else + this.trueList = ["true"]; + + if(falseList) + this.falseList = falseList; + else + this.falseList = ["false"]; + } + parse(val){ + if (typeof val === 'string') { + //TODO: performance: don't convert + const temp = val.toLowerCase(); + if(this.trueList.indexOf(temp) !== -1) return true; + else if(this.falseList.indexOf(temp) !== -1 ) return false; + } + return val; + } +} diff --git a/node_modules/fast-xml-parser/src/v6/valueParsers/booleanParserExt.js b/node_modules/fast-xml-parser/src/v6/valueParsers/booleanParserExt.js new file mode 100644 index 00000000..ec3ba427 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/valueParsers/booleanParserExt.js @@ -0,0 +1,19 @@ +export default function boolParserExt(val){ + if(isArray(val)){ + for (let i = 0; i < val.length; i++) { + val[i] = parse(val[i]) + } + }else{ + val = parse(val) + } + return val; +} + +function parse(val){ + if (typeof val === 'string') { + const temp = val.toLowerCase(); + if(temp === 'true' || temp ==="yes" || temp==="1") return true; + else if(temp === 'false' || temp ==="no" || temp==="0") return false; + } + return val; +} diff --git a/node_modules/fast-xml-parser/src/v6/valueParsers/currency.js b/node_modules/fast-xml-parser/src/v6/valueParsers/currency.js new file mode 100644 index 00000000..37728176 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/valueParsers/currency.js @@ -0,0 +1,38 @@ +const defaultOptions = { + maxLength: 200, + // locale: "en-IN" +} +const localeMap = { + "$":"en-US", + "€":"de-DE", + "£":"en-GB", + "¥":"ja-JP", + "₹":"en-IN", +} +const sign = "(?:-|\+)?"; +const digitsAndSeparator = "(?:\d+|\d{1,3}(?:,\d{3})+)"; +const decimalPart = "(?:\.\d{1,2})?"; +const symbol = "(?:\$|€|¥|₹)?"; + +const currencyCheckRegex = /^\s*(?:-|\+)?(?:\d+|\d{1,3}(?:,\d{3})+)?(?:\.\d{1,2})?\s*(?:\$|€|¥|₹)?\s*$/u; + +export default class CurrencyParser{ + constructor(options){ + this.options = options || defaultOptions; + } + parse(val){ + if (typeof val === 'string' && val.length <= this.options.maxLength) { + if(val.indexOf(",,") !== -1 && val.indexOf(".." !== -1)){ + const match = val.match(currencyCheckRegex); + if(match){ + const locale = this.options.locale || localeMap[match[2]||match[5]||"₹"]; + const formatter = new Intl.NumberFormat(locale) + val = val.replace(/[^0-9,.]/g, '').trim(); + val = Number(val.replace(formatter.format(1000)[1], '')); + } + } + } + return val; + } +} +CurrencyParser.defaultOptions = defaultOptions; diff --git a/node_modules/fast-xml-parser/src/v6/valueParsers/join.js b/node_modules/fast-xml-parser/src/v6/valueParsers/join.js new file mode 100644 index 00000000..f597d99a --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/valueParsers/join.js @@ -0,0 +1,13 @@ +/** + * + * @param {array} val + * @param {string} by + * @returns + */ +export default function join(val, by=" "){ + if(isArray(val)){ + val.join(by) + } + return val; +} + diff --git a/node_modules/fast-xml-parser/src/v6/valueParsers/number.js b/node_modules/fast-xml-parser/src/v6/valueParsers/number.js new file mode 100644 index 00000000..8397fb61 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/valueParsers/number.js @@ -0,0 +1,14 @@ +import toNumber from "strnum"; + + +export default class numParser{ + constructor(options){ + this.options = options; + } + parse(val){ + if (typeof val === 'string') { + val = toNumber(val,this.options); + } + return val; + } +} diff --git a/node_modules/fast-xml-parser/src/v6/valueParsers/trim.js b/node_modules/fast-xml-parser/src/v6/valueParsers/trim.js new file mode 100644 index 00000000..50eed7f9 --- /dev/null +++ b/node_modules/fast-xml-parser/src/v6/valueParsers/trim.js @@ -0,0 +1,6 @@ +export default class trimmer{ + parse(val){ + if(typeof val === "string") return val.trim(); + else return val; + } +} diff --git a/node_modules/fast-xml-parser/src/validator.js b/node_modules/fast-xml-parser/src/validator.js new file mode 100644 index 00000000..3b1b2efb --- /dev/null +++ b/node_modules/fast-xml-parser/src/validator.js @@ -0,0 +1,425 @@ +'use strict'; + +const util = require('./util'); + +const defaultOptions = { + allowBooleanAttributes: false, //A tag can have attributes without any value + unpairedTags: [] +}; + +//const tagsPattern = new RegExp("<\\/?([\\w:\\-_\.]+)\\s*\/?>","g"); +exports.validate = function (xmlData, options) { + options = Object.assign({}, defaultOptions, options); + + //xmlData = xmlData.replace(/(\r\n|\n|\r)/gm,"");//make it single line + //xmlData = xmlData.replace(/(^\s*<\?xml.*?\?>)/g,"");//Remove XML starting tag + //xmlData = xmlData.replace(/()/g,"");//Remove DOCTYPE + const tags = []; + let tagFound = false; + + //indicates that the root tag has been closed (aka. depth 0 has been reached) + let reachedRoot = false; + + if (xmlData[0] === '\ufeff') { + // check for byte order mark (BOM) + xmlData = xmlData.substr(1); + } + + for (let i = 0; i < xmlData.length; i++) { + + if (xmlData[i] === '<' && xmlData[i+1] === '?') { + i+=2; + i = readPI(xmlData,i); + if (i.err) return i; + }else if (xmlData[i] === '<') { + //starting of tag + //read until you reach to '>' avoiding any '>' in attribute value + let tagStartPos = i; + i++; + + if (xmlData[i] === '!') { + i = readCommentAndCDATA(xmlData, i); + continue; + } else { + let closingTag = false; + if (xmlData[i] === '/') { + //closing tag + closingTag = true; + i++; + } + //read tagname + let tagName = ''; + for (; i < xmlData.length && + xmlData[i] !== '>' && + xmlData[i] !== ' ' && + xmlData[i] !== '\t' && + xmlData[i] !== '\n' && + xmlData[i] !== '\r'; i++ + ) { + tagName += xmlData[i]; + } + tagName = tagName.trim(); + //console.log(tagName); + + if (tagName[tagName.length - 1] === '/') { + //self closing tag without attributes + tagName = tagName.substring(0, tagName.length - 1); + //continue; + i--; + } + if (!validateTagName(tagName)) { + let msg; + if (tagName.trim().length === 0) { + msg = "Invalid space after '<'."; + } else { + msg = "Tag '"+tagName+"' is an invalid name."; + } + return getErrorObject('InvalidTag', msg, getLineNumberForPosition(xmlData, i)); + } + + const result = readAttributeStr(xmlData, i); + if (result === false) { + return getErrorObject('InvalidAttr', "Attributes for '"+tagName+"' have open quote.", getLineNumberForPosition(xmlData, i)); + } + let attrStr = result.value; + i = result.index; + + if (attrStr[attrStr.length - 1] === '/') { + //self closing tag + const attrStrStart = i - attrStr.length; + attrStr = attrStr.substring(0, attrStr.length - 1); + const isValid = validateAttributeString(attrStr, options); + if (isValid === true) { + tagFound = true; + //continue; //text may presents after self closing tag + } else { + //the result from the nested function returns the position of the error within the attribute + //in order to get the 'true' error line, we need to calculate the position where the attribute begins (i - attrStr.length) and then add the position within the attribute + //this gives us the absolute index in the entire xml, which we can use to find the line at last + return getErrorObject(isValid.err.code, isValid.err.msg, getLineNumberForPosition(xmlData, attrStrStart + isValid.err.line)); + } + } else if (closingTag) { + if (!result.tagClosed) { + return getErrorObject('InvalidTag', "Closing tag '"+tagName+"' doesn't have proper closing.", getLineNumberForPosition(xmlData, i)); + } else if (attrStr.trim().length > 0) { + return getErrorObject('InvalidTag', "Closing tag '"+tagName+"' can't have attributes or invalid starting.", getLineNumberForPosition(xmlData, tagStartPos)); + } else if (tags.length === 0) { + return getErrorObject('InvalidTag', "Closing tag '"+tagName+"' has not been opened.", getLineNumberForPosition(xmlData, tagStartPos)); + } else { + const otg = tags.pop(); + if (tagName !== otg.tagName) { + let openPos = getLineNumberForPosition(xmlData, otg.tagStartPos); + return getErrorObject('InvalidTag', + "Expected closing tag '"+otg.tagName+"' (opened in line "+openPos.line+", col "+openPos.col+") instead of closing tag '"+tagName+"'.", + getLineNumberForPosition(xmlData, tagStartPos)); + } + + //when there are no more tags, we reached the root level. + if (tags.length == 0) { + reachedRoot = true; + } + } + } else { + const isValid = validateAttributeString(attrStr, options); + if (isValid !== true) { + //the result from the nested function returns the position of the error within the attribute + //in order to get the 'true' error line, we need to calculate the position where the attribute begins (i - attrStr.length) and then add the position within the attribute + //this gives us the absolute index in the entire xml, which we can use to find the line at last + return getErrorObject(isValid.err.code, isValid.err.msg, getLineNumberForPosition(xmlData, i - attrStr.length + isValid.err.line)); + } + + //if the root level has been reached before ... + if (reachedRoot === true) { + return getErrorObject('InvalidXml', 'Multiple possible root nodes found.', getLineNumberForPosition(xmlData, i)); + } else if(options.unpairedTags.indexOf(tagName) !== -1){ + //don't push into stack + } else { + tags.push({tagName, tagStartPos}); + } + tagFound = true; + } + + //skip tag text value + //It may include comments and CDATA value + for (i++; i < xmlData.length; i++) { + if (xmlData[i] === '<') { + if (xmlData[i + 1] === '!') { + //comment or CADATA + i++; + i = readCommentAndCDATA(xmlData, i); + continue; + } else if (xmlData[i+1] === '?') { + i = readPI(xmlData, ++i); + if (i.err) return i; + } else{ + break; + } + } else if (xmlData[i] === '&') { + const afterAmp = validateAmpersand(xmlData, i); + if (afterAmp == -1) + return getErrorObject('InvalidChar', "char '&' is not expected.", getLineNumberForPosition(xmlData, i)); + i = afterAmp; + }else{ + if (reachedRoot === true && !isWhiteSpace(xmlData[i])) { + return getErrorObject('InvalidXml', "Extra text at the end", getLineNumberForPosition(xmlData, i)); + } + } + } //end of reading tag text value + if (xmlData[i] === '<') { + i--; + } + } + } else { + if ( isWhiteSpace(xmlData[i])) { + continue; + } + return getErrorObject('InvalidChar', "char '"+xmlData[i]+"' is not expected.", getLineNumberForPosition(xmlData, i)); + } + } + + if (!tagFound) { + return getErrorObject('InvalidXml', 'Start tag expected.', 1); + }else if (tags.length == 1) { + return getErrorObject('InvalidTag', "Unclosed tag '"+tags[0].tagName+"'.", getLineNumberForPosition(xmlData, tags[0].tagStartPos)); + }else if (tags.length > 0) { + return getErrorObject('InvalidXml', "Invalid '"+ + JSON.stringify(tags.map(t => t.tagName), null, 4).replace(/\r?\n/g, '')+ + "' found.", {line: 1, col: 1}); + } + + return true; +}; + +function isWhiteSpace(char){ + return char === ' ' || char === '\t' || char === '\n' || char === '\r'; +} +/** + * Read Processing insstructions and skip + * @param {*} xmlData + * @param {*} i + */ +function readPI(xmlData, i) { + const start = i; + for (; i < xmlData.length; i++) { + if (xmlData[i] == '?' || xmlData[i] == ' ') { + //tagname + const tagname = xmlData.substr(start, i - start); + if (i > 5 && tagname === 'xml') { + return getErrorObject('InvalidXml', 'XML declaration allowed only at the start of the document.', getLineNumberForPosition(xmlData, i)); + } else if (xmlData[i] == '?' && xmlData[i + 1] == '>') { + //check if valid attribut string + i++; + break; + } else { + continue; + } + } + } + return i; +} + +function readCommentAndCDATA(xmlData, i) { + if (xmlData.length > i + 5 && xmlData[i + 1] === '-' && xmlData[i + 2] === '-') { + //comment + for (i += 3; i < xmlData.length; i++) { + if (xmlData[i] === '-' && xmlData[i + 1] === '-' && xmlData[i + 2] === '>') { + i += 2; + break; + } + } + } else if ( + xmlData.length > i + 8 && + xmlData[i + 1] === 'D' && + xmlData[i + 2] === 'O' && + xmlData[i + 3] === 'C' && + xmlData[i + 4] === 'T' && + xmlData[i + 5] === 'Y' && + xmlData[i + 6] === 'P' && + xmlData[i + 7] === 'E' + ) { + let angleBracketsCount = 1; + for (i += 8; i < xmlData.length; i++) { + if (xmlData[i] === '<') { + angleBracketsCount++; + } else if (xmlData[i] === '>') { + angleBracketsCount--; + if (angleBracketsCount === 0) { + break; + } + } + } + } else if ( + xmlData.length > i + 9 && + xmlData[i + 1] === '[' && + xmlData[i + 2] === 'C' && + xmlData[i + 3] === 'D' && + xmlData[i + 4] === 'A' && + xmlData[i + 5] === 'T' && + xmlData[i + 6] === 'A' && + xmlData[i + 7] === '[' + ) { + for (i += 8; i < xmlData.length; i++) { + if (xmlData[i] === ']' && xmlData[i + 1] === ']' && xmlData[i + 2] === '>') { + i += 2; + break; + } + } + } + + return i; +} + +const doubleQuote = '"'; +const singleQuote = "'"; + +/** + * Keep reading xmlData until '<' is found outside the attribute value. + * @param {string} xmlData + * @param {number} i + */ +function readAttributeStr(xmlData, i) { + let attrStr = ''; + let startChar = ''; + let tagClosed = false; + for (; i < xmlData.length; i++) { + if (xmlData[i] === doubleQuote || xmlData[i] === singleQuote) { + if (startChar === '') { + startChar = xmlData[i]; + } else if (startChar !== xmlData[i]) { + //if vaue is enclosed with double quote then single quotes are allowed inside the value and vice versa + } else { + startChar = ''; + } + } else if (xmlData[i] === '>') { + if (startChar === '') { + tagClosed = true; + break; + } + } + attrStr += xmlData[i]; + } + if (startChar !== '') { + return false; + } + + return { + value: attrStr, + index: i, + tagClosed: tagClosed + }; +} + +/** + * Select all the attributes whether valid or invalid. + */ +const validAttrStrRegxp = new RegExp('(\\s*)([^\\s=]+)(\\s*=)?(\\s*([\'"])(([\\s\\S])*?)\\5)?', 'g'); + +//attr, ="sd", a="amit's", a="sd"b="saf", ab cd="" + +function validateAttributeString(attrStr, options) { + //console.log("start:"+attrStr+":end"); + + //if(attrStr.trim().length === 0) return true; //empty string + + const matches = util.getAllMatches(attrStr, validAttrStrRegxp); + const attrNames = {}; + + for (let i = 0; i < matches.length; i++) { + if (matches[i][1].length === 0) { + //nospace before attribute name: a="sd"b="saf" + return getErrorObject('InvalidAttr', "Attribute '"+matches[i][2]+"' has no space in starting.", getPositionFromMatch(matches[i])) + } else if (matches[i][3] !== undefined && matches[i][4] === undefined) { + return getErrorObject('InvalidAttr', "Attribute '"+matches[i][2]+"' is without value.", getPositionFromMatch(matches[i])); + } else if (matches[i][3] === undefined && !options.allowBooleanAttributes) { + //independent attribute: ab + return getErrorObject('InvalidAttr', "boolean attribute '"+matches[i][2]+"' is not allowed.", getPositionFromMatch(matches[i])); + } + /* else if(matches[i][6] === undefined){//attribute without value: ab= + return { err: { code:"InvalidAttr",msg:"attribute " + matches[i][2] + " has no value assigned."}}; + } */ + const attrName = matches[i][2]; + if (!validateAttrName(attrName)) { + return getErrorObject('InvalidAttr', "Attribute '"+attrName+"' is an invalid name.", getPositionFromMatch(matches[i])); + } + if (!attrNames.hasOwnProperty(attrName)) { + //check for duplicate attribute. + attrNames[attrName] = 1; + } else { + return getErrorObject('InvalidAttr', "Attribute '"+attrName+"' is repeated.", getPositionFromMatch(matches[i])); + } + } + + return true; +} + +function validateNumberAmpersand(xmlData, i) { + let re = /\d/; + if (xmlData[i] === 'x') { + i++; + re = /[\da-fA-F]/; + } + for (; i < xmlData.length; i++) { + if (xmlData[i] === ';') + return i; + if (!xmlData[i].match(re)) + break; + } + return -1; +} + +function validateAmpersand(xmlData, i) { + // https://www.w3.org/TR/xml/#dt-charref + i++; + if (xmlData[i] === ';') + return -1; + if (xmlData[i] === '#') { + i++; + return validateNumberAmpersand(xmlData, i); + } + let count = 0; + for (; i < xmlData.length; i++, count++) { + if (xmlData[i].match(/\w/) && count < 20) + continue; + if (xmlData[i] === ';') + break; + return -1; + } + return i; +} + +function getErrorObject(code, message, lineNumber) { + return { + err: { + code: code, + msg: message, + line: lineNumber.line || lineNumber, + col: lineNumber.col, + }, + }; +} + +function validateAttrName(attrName) { + return util.isName(attrName); +} + +// const startsWithXML = /^xml/i; + +function validateTagName(tagname) { + return util.isName(tagname) /* && !tagname.match(startsWithXML) */; +} + +//this function returns the line number for the character at the given index +function getLineNumberForPosition(xmlData, index) { + const lines = xmlData.substring(0, index).split(/\r?\n/); + return { + line: lines.length, + + // column number is last line's length + 1, because column numbering starts at 1: + col: lines[lines.length - 1].length + 1 + }; +} + +//this function returns the position of the first character of match within attrStr +function getPositionFromMatch(match) { + return match.startIndex + match[1].length; +} diff --git a/node_modules/fast-xml-parser/src/xmlbuilder/json2xml.js b/node_modules/fast-xml-parser/src/xmlbuilder/json2xml.js new file mode 100644 index 00000000..2274dfaa --- /dev/null +++ b/node_modules/fast-xml-parser/src/xmlbuilder/json2xml.js @@ -0,0 +1,286 @@ +'use strict'; +//parse Empty Node as self closing node +const buildFromOrderedJs = require('./orderedJs2Xml'); +const getIgnoreAttributesFn = require('../ignoreAttributes') + +const defaultOptions = { + attributeNamePrefix: '@_', + attributesGroupName: false, + textNodeName: '#text', + ignoreAttributes: true, + cdataPropName: false, + format: false, + indentBy: ' ', + suppressEmptyNode: false, + suppressUnpairedNode: true, + suppressBooleanAttributes: true, + tagValueProcessor: function(key, a) { + return a; + }, + attributeValueProcessor: function(attrName, a) { + return a; + }, + preserveOrder: false, + commentPropName: false, + unpairedTags: [], + entities: [ + { regex: new RegExp("&", "g"), val: "&" },//it must be on top + { regex: new RegExp(">", "g"), val: ">" }, + { regex: new RegExp("<", "g"), val: "<" }, + { regex: new RegExp("\'", "g"), val: "'" }, + { regex: new RegExp("\"", "g"), val: """ } + ], + processEntities: true, + stopNodes: [], + // transformTagName: false, + // transformAttributeName: false, + oneListGroup: false +}; + +function Builder(options) { + this.options = Object.assign({}, defaultOptions, options); + if (this.options.ignoreAttributes === true || this.options.attributesGroupName) { + this.isAttribute = function(/*a*/) { + return false; + }; + } else { + this.ignoreAttributesFn = getIgnoreAttributesFn(this.options.ignoreAttributes) + this.attrPrefixLen = this.options.attributeNamePrefix.length; + this.isAttribute = isAttribute; + } + + this.processTextOrObjNode = processTextOrObjNode + + if (this.options.format) { + this.indentate = indentate; + this.tagEndChar = '>\n'; + this.newLine = '\n'; + } else { + this.indentate = function() { + return ''; + }; + this.tagEndChar = '>'; + this.newLine = ''; + } +} + +Builder.prototype.build = function(jObj) { + if(this.options.preserveOrder){ + return buildFromOrderedJs(jObj, this.options); + }else { + if(Array.isArray(jObj) && this.options.arrayNodeName && this.options.arrayNodeName.length > 1){ + jObj = { + [this.options.arrayNodeName] : jObj + } + } + return this.j2x(jObj, 0, []).val; + } +}; + +Builder.prototype.j2x = function(jObj, level, ajPath) { + let attrStr = ''; + let val = ''; + const jPath = ajPath.join('.') + for (let key in jObj) { + if(!Object.prototype.hasOwnProperty.call(jObj, key)) continue; + if (typeof jObj[key] === 'undefined') { + // supress undefined node only if it is not an attribute + if (this.isAttribute(key)) { + val += ''; + } + } else if (jObj[key] === null) { + // null attribute should be ignored by the attribute list, but should not cause the tag closing + if (this.isAttribute(key)) { + val += ''; + } else if (key === this.options.cdataPropName) { + val += ''; + } else if (key[0] === '?') { + val += this.indentate(level) + '<' + key + '?' + this.tagEndChar; + } else { + val += this.indentate(level) + '<' + key + '/' + this.tagEndChar; + } + // val += this.indentate(level) + '<' + key + '/' + this.tagEndChar; + } else if (jObj[key] instanceof Date) { + val += this.buildTextValNode(jObj[key], key, '', level); + } else if (typeof jObj[key] !== 'object') { + //premitive type + const attr = this.isAttribute(key); + if (attr && !this.ignoreAttributesFn(attr, jPath)) { + attrStr += this.buildAttrPairStr(attr, '' + jObj[key]); + } else if (!attr) { + //tag value + if (key === this.options.textNodeName) { + let newval = this.options.tagValueProcessor(key, '' + jObj[key]); + val += this.replaceEntitiesValue(newval); + } else { + val += this.buildTextValNode(jObj[key], key, '', level); + } + } + } else if (Array.isArray(jObj[key])) { + //repeated nodes + const arrLen = jObj[key].length; + let listTagVal = ""; + let listTagAttr = ""; + for (let j = 0; j < arrLen; j++) { + const item = jObj[key][j]; + if (typeof item === 'undefined') { + // supress undefined node + } else if (item === null) { + if(key[0] === "?") val += this.indentate(level) + '<' + key + '?' + this.tagEndChar; + else val += this.indentate(level) + '<' + key + '/' + this.tagEndChar; + // val += this.indentate(level) + '<' + key + '/' + this.tagEndChar; + } else if (typeof item === 'object') { + if(this.options.oneListGroup){ + const result = this.j2x(item, level + 1, ajPath.concat(key)); + listTagVal += result.val; + if (this.options.attributesGroupName && item.hasOwnProperty(this.options.attributesGroupName)) { + listTagAttr += result.attrStr + } + }else{ + listTagVal += this.processTextOrObjNode(item, key, level, ajPath) + } + } else { + if (this.options.oneListGroup) { + let textValue = this.options.tagValueProcessor(key, item); + textValue = this.replaceEntitiesValue(textValue); + listTagVal += textValue; + } else { + listTagVal += this.buildTextValNode(item, key, '', level); + } + } + } + if(this.options.oneListGroup){ + listTagVal = this.buildObjectNode(listTagVal, key, listTagAttr, level); + } + val += listTagVal; + } else { + //nested node + if (this.options.attributesGroupName && key === this.options.attributesGroupName) { + const Ks = Object.keys(jObj[key]); + const L = Ks.length; + for (let j = 0; j < L; j++) { + attrStr += this.buildAttrPairStr(Ks[j], '' + jObj[key][Ks[j]]); + } + } else { + val += this.processTextOrObjNode(jObj[key], key, level, ajPath) + } + } + } + return {attrStr: attrStr, val: val}; +}; + +Builder.prototype.buildAttrPairStr = function(attrName, val){ + val = this.options.attributeValueProcessor(attrName, '' + val); + val = this.replaceEntitiesValue(val); + if (this.options.suppressBooleanAttributes && val === "true") { + return ' ' + attrName; + } else return ' ' + attrName + '="' + val + '"'; +} + +function processTextOrObjNode (object, key, level, ajPath) { + const result = this.j2x(object, level + 1, ajPath.concat(key)); + if (object[this.options.textNodeName] !== undefined && Object.keys(object).length === 1) { + return this.buildTextValNode(object[this.options.textNodeName], key, result.attrStr, level); + } else { + return this.buildObjectNode(result.val, key, result.attrStr, level); + } +} + +Builder.prototype.buildObjectNode = function(val, key, attrStr, level) { + if(val === ""){ + if(key[0] === "?") return this.indentate(level) + '<' + key + attrStr+ '?' + this.tagEndChar; + else { + return this.indentate(level) + '<' + key + attrStr + this.closeTag(key) + this.tagEndChar; + } + }else{ + + let tagEndExp = '' + val + tagEndExp ); + } else if (this.options.commentPropName !== false && key === this.options.commentPropName && piClosingChar.length === 0) { + return this.indentate(level) + `` + this.newLine; + }else { + return ( + this.indentate(level) + '<' + key + attrStr + piClosingChar + this.tagEndChar + + val + + this.indentate(level) + tagEndExp ); + } + } +} + +Builder.prototype.closeTag = function(key){ + let closeTag = ""; + if(this.options.unpairedTags.indexOf(key) !== -1){ //unpaired + if(!this.options.suppressUnpairedNode) closeTag = "/" + }else if(this.options.suppressEmptyNode){ //empty + closeTag = "/"; + }else{ + closeTag = `>` + this.newLine; + }else if (this.options.commentPropName !== false && key === this.options.commentPropName) { + return this.indentate(level) + `` + this.newLine; + }else if(key[0] === "?") {//PI tag + return this.indentate(level) + '<' + key + attrStr+ '?' + this.tagEndChar; + }else{ + let textValue = this.options.tagValueProcessor(key, val); + textValue = this.replaceEntitiesValue(textValue); + + if( textValue === ''){ + return this.indentate(level) + '<' + key + attrStr + this.closeTag(key) + this.tagEndChar; + }else{ + return this.indentate(level) + '<' + key + attrStr + '>' + + textValue + + ' 0 && this.options.processEntities){ + for (let i=0; i 0) { + indentation = EOL; + } + return arrToStr(jArray, options, "", indentation); +} + +function arrToStr(arr, options, jPath, indentation) { + let xmlStr = ""; + let isPreviousElementTag = false; + + for (let i = 0; i < arr.length; i++) { + const tagObj = arr[i]; + const tagName = propName(tagObj); + if(tagName === undefined) continue; + + let newJPath = ""; + if (jPath.length === 0) newJPath = tagName + else newJPath = `${jPath}.${tagName}`; + + if (tagName === options.textNodeName) { + let tagText = tagObj[tagName]; + if (!isStopNode(newJPath, options)) { + tagText = options.tagValueProcessor(tagName, tagText); + tagText = replaceEntitiesValue(tagText, options); + } + if (isPreviousElementTag) { + xmlStr += indentation; + } + xmlStr += tagText; + isPreviousElementTag = false; + continue; + } else if (tagName === options.cdataPropName) { + if (isPreviousElementTag) { + xmlStr += indentation; + } + xmlStr += ``; + isPreviousElementTag = false; + continue; + } else if (tagName === options.commentPropName) { + xmlStr += indentation + ``; + isPreviousElementTag = true; + continue; + } else if (tagName[0] === "?") { + const attStr = attr_to_str(tagObj[":@"], options); + const tempInd = tagName === "?xml" ? "" : indentation; + let piTextNodeName = tagObj[tagName][0][options.textNodeName]; + piTextNodeName = piTextNodeName.length !== 0 ? " " + piTextNodeName : ""; //remove extra spacing + xmlStr += tempInd + `<${tagName}${piTextNodeName}${attStr}?>`; + isPreviousElementTag = true; + continue; + } + let newIdentation = indentation; + if (newIdentation !== "") { + newIdentation += options.indentBy; + } + const attStr = attr_to_str(tagObj[":@"], options); + const tagStart = indentation + `<${tagName}${attStr}`; + const tagValue = arrToStr(tagObj[tagName], options, newJPath, newIdentation); + if (options.unpairedTags.indexOf(tagName) !== -1) { + if (options.suppressUnpairedNode) xmlStr += tagStart + ">"; + else xmlStr += tagStart + "/>"; + } else if ((!tagValue || tagValue.length === 0) && options.suppressEmptyNode) { + xmlStr += tagStart + "/>"; + } else if (tagValue && tagValue.endsWith(">")) { + xmlStr += tagStart + `>${tagValue}${indentation}`; + } else { + xmlStr += tagStart + ">"; + if (tagValue && indentation !== "" && (tagValue.includes("/>") || tagValue.includes("`; + } + isPreviousElementTag = true; + } + + return xmlStr; +} + +function propName(obj) { + const keys = Object.keys(obj); + for (let i = 0; i < keys.length; i++) { + const key = keys[i]; + if(!obj.hasOwnProperty(key)) continue; + if (key !== ":@") return key; + } +} + +function attr_to_str(attrMap, options) { + let attrStr = ""; + if (attrMap && !options.ignoreAttributes) { + for (let attr in attrMap) { + if(!attrMap.hasOwnProperty(attr)) continue; + let attrVal = options.attributeValueProcessor(attr, attrMap[attr]); + attrVal = replaceEntitiesValue(attrVal, options); + if (attrVal === true && options.suppressBooleanAttributes) { + attrStr += ` ${attr.substr(options.attributeNamePrefix.length)}`; + } else { + attrStr += ` ${attr.substr(options.attributeNamePrefix.length)}="${attrVal}"`; + } + } + } + return attrStr; +} + +function isStopNode(jPath, options) { + jPath = jPath.substr(0, jPath.length - options.textNodeName.length - 1); + let tagName = jPath.substr(jPath.lastIndexOf(".") + 1); + for (let index in options.stopNodes) { + if (options.stopNodes[index] === jPath || options.stopNodes[index] === "*." + tagName) return true; + } + return false; +} + +function replaceEntitiesValue(textValue, options) { + if (textValue && textValue.length > 0 && options.processEntities) { + for (let i = 0; i < options.entities.length; i++) { + const entity = options.entities[i]; + textValue = textValue.replace(entity.regex, entity.val); + } + } + return textValue; +} +module.exports = toXml; diff --git a/node_modules/fast-xml-parser/src/xmlbuilder/prettifyJs2Xml.js b/node_modules/fast-xml-parser/src/xmlbuilder/prettifyJs2Xml.js new file mode 100644 index 00000000..e69de29b diff --git a/node_modules/fast-xml-parser/src/xmlparser/DocTypeReader.js b/node_modules/fast-xml-parser/src/xmlparser/DocTypeReader.js new file mode 100644 index 00000000..bfde18e8 --- /dev/null +++ b/node_modules/fast-xml-parser/src/xmlparser/DocTypeReader.js @@ -0,0 +1,153 @@ +const util = require('../util'); + +//TODO: handle comments +function readDocType(xmlData, i){ + + const entities = {}; + if( xmlData[i + 3] === 'O' && + xmlData[i + 4] === 'C' && + xmlData[i + 5] === 'T' && + xmlData[i + 6] === 'Y' && + xmlData[i + 7] === 'P' && + xmlData[i + 8] === 'E') + { + i = i+9; + let angleBracketsCount = 1; + let hasBody = false, comment = false; + let exp = ""; + for(;i') { //Read tag content + if(comment){ + if( xmlData[i - 1] === "-" && xmlData[i - 2] === "-"){ + comment = false; + angleBracketsCount--; + } + }else{ + angleBracketsCount--; + } + if (angleBracketsCount === 0) { + break; + } + }else if( xmlData[i] === '['){ + hasBody = true; + }else{ + exp += xmlData[i]; + } + } + if(angleBracketsCount !== 0){ + throw new Error(`Unclosed DOCTYPE`); + } + }else{ + throw new Error(`Invalid Tag instead of DOCTYPE`); + } + return {entities, i}; +} + +function readEntityExp(xmlData,i){ + //External entities are not supported + // + + //Parameter entities are not supported + // + + //Internal entities are supported + // + + //read EntityName + let entityName = ""; + for (; i < xmlData.length && (xmlData[i] !== "'" && xmlData[i] !== '"' ); i++) { + // if(xmlData[i] === " ") continue; + // else + entityName += xmlData[i]; + } + entityName = entityName.trim(); + if(entityName.indexOf(" ") !== -1) throw new Error("External entites are not supported"); + + //read Entity Value + const startChar = xmlData[i++]; + let val = "" + for (; i < xmlData.length && xmlData[i] !== startChar ; i++) { + val += xmlData[i]; + } + return [entityName, val, i]; +} + +function isComment(xmlData, i){ + if(xmlData[i+1] === '!' && + xmlData[i+2] === '-' && + xmlData[i+3] === '-') return true + return false +} +function isEntity(xmlData, i){ + if(xmlData[i+1] === '!' && + xmlData[i+2] === 'E' && + xmlData[i+3] === 'N' && + xmlData[i+4] === 'T' && + xmlData[i+5] === 'I' && + xmlData[i+6] === 'T' && + xmlData[i+7] === 'Y') return true + return false +} +function isElement(xmlData, i){ + if(xmlData[i+1] === '!' && + xmlData[i+2] === 'E' && + xmlData[i+3] === 'L' && + xmlData[i+4] === 'E' && + xmlData[i+5] === 'M' && + xmlData[i+6] === 'E' && + xmlData[i+7] === 'N' && + xmlData[i+8] === 'T') return true + return false +} + +function isAttlist(xmlData, i){ + if(xmlData[i+1] === '!' && + xmlData[i+2] === 'A' && + xmlData[i+3] === 'T' && + xmlData[i+4] === 'T' && + xmlData[i+5] === 'L' && + xmlData[i+6] === 'I' && + xmlData[i+7] === 'S' && + xmlData[i+8] === 'T') return true + return false +} +function isNotation(xmlData, i){ + if(xmlData[i+1] === '!' && + xmlData[i+2] === 'N' && + xmlData[i+3] === 'O' && + xmlData[i+4] === 'T' && + xmlData[i+5] === 'A' && + xmlData[i+6] === 'T' && + xmlData[i+7] === 'I' && + xmlData[i+8] === 'O' && + xmlData[i+9] === 'N') return true + return false +} + +function validateEntityName(name){ + if (util.isName(name)) + return name; + else + throw new Error(`Invalid entity name ${name}`); +} + +module.exports = readDocType; diff --git a/node_modules/fast-xml-parser/src/xmlparser/OptionsBuilder.js b/node_modules/fast-xml-parser/src/xmlparser/OptionsBuilder.js new file mode 100644 index 00000000..bca37769 --- /dev/null +++ b/node_modules/fast-xml-parser/src/xmlparser/OptionsBuilder.js @@ -0,0 +1,48 @@ + +const defaultOptions = { + preserveOrder: false, + attributeNamePrefix: '@_', + attributesGroupName: false, + textNodeName: '#text', + ignoreAttributes: true, + removeNSPrefix: false, // remove NS from tag name or attribute name if true + allowBooleanAttributes: false, //a tag can have attributes without any value + //ignoreRootElement : false, + parseTagValue: true, + parseAttributeValue: false, + trimValues: true, //Trim string values of tag and attributes + cdataPropName: false, + numberParseOptions: { + hex: true, + leadingZeros: true, + eNotation: true + }, + tagValueProcessor: function(tagName, val) { + return val; + }, + attributeValueProcessor: function(attrName, val) { + return val; + }, + stopNodes: [], //nested tags will not be parsed even for errors + alwaysCreateTextNode: false, + isArray: () => false, + commentPropName: false, + unpairedTags: [], + processEntities: true, + htmlEntities: false, + ignoreDeclaration: false, + ignorePiTags: false, + transformTagName: false, + transformAttributeName: false, + updateTag: function(tagName, jPath, attrs){ + return tagName + }, + // skipEmptyListItem: false +}; + +const buildOptions = function(options) { + return Object.assign({}, defaultOptions, options); +}; + +exports.buildOptions = buildOptions; +exports.defaultOptions = defaultOptions; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/xmlparser/OrderedObjParser.js b/node_modules/fast-xml-parser/src/xmlparser/OrderedObjParser.js new file mode 100644 index 00000000..4f890039 --- /dev/null +++ b/node_modules/fast-xml-parser/src/xmlparser/OrderedObjParser.js @@ -0,0 +1,606 @@ +'use strict'; +///@ts-check + +const util = require('../util'); +const xmlNode = require('./xmlNode'); +const readDocType = require("./DocTypeReader"); +const toNumber = require("strnum"); +const getIgnoreAttributesFn = require('../ignoreAttributes') + +// const regx = +// '<((!\\[CDATA\\[([\\s\\S]*?)(]]>))|((NAME:)?(NAME))([^>]*)>|((\\/)(NAME)\\s*>))([^<]*)' +// .replace(/NAME/g, util.nameRegexp); + +//const tagsRegx = new RegExp("<(\\/?[\\w:\\-\._]+)([^>]*)>(\\s*"+cdataRegx+")*([^<]+)?","g"); +//const tagsRegx = new RegExp("<(\\/?)((\\w*:)?([\\w:\\-\._]+))([^>]*)>([^<]*)("+cdataRegx+"([^<]*))*([^<]+)?","g"); + +class OrderedObjParser{ + constructor(options){ + this.options = options; + this.currentNode = null; + this.tagsNodeStack = []; + this.docTypeEntities = {}; + this.lastEntities = { + "apos" : { regex: /&(apos|#39|#x27);/g, val : "'"}, + "gt" : { regex: /&(gt|#62|#x3E);/g, val : ">"}, + "lt" : { regex: /&(lt|#60|#x3C);/g, val : "<"}, + "quot" : { regex: /&(quot|#34|#x22);/g, val : "\""}, + }; + this.ampEntity = { regex: /&(amp|#38|#x26);/g, val : "&"}; + this.htmlEntities = { + "space": { regex: /&(nbsp|#160);/g, val: " " }, + // "lt" : { regex: /&(lt|#60);/g, val: "<" }, + // "gt" : { regex: /&(gt|#62);/g, val: ">" }, + // "amp" : { regex: /&(amp|#38);/g, val: "&" }, + // "quot" : { regex: /&(quot|#34);/g, val: "\"" }, + // "apos" : { regex: /&(apos|#39);/g, val: "'" }, + "cent" : { regex: /&(cent|#162);/g, val: "¢" }, + "pound" : { regex: /&(pound|#163);/g, val: "£" }, + "yen" : { regex: /&(yen|#165);/g, val: "¥" }, + "euro" : { regex: /&(euro|#8364);/g, val: "€" }, + "copyright" : { regex: /&(copy|#169);/g, val: "©" }, + "reg" : { regex: /&(reg|#174);/g, val: "®" }, + "inr" : { regex: /&(inr|#8377);/g, val: "₹" }, + "num_dec": { regex: /&#([0-9]{1,7});/g, val : (_, str) => String.fromCharCode(Number.parseInt(str, 10)) }, + "num_hex": { regex: /&#x([0-9a-fA-F]{1,6});/g, val : (_, str) => String.fromCharCode(Number.parseInt(str, 16)) }, + }; + this.addExternalEntities = addExternalEntities; + this.parseXml = parseXml; + this.parseTextData = parseTextData; + this.resolveNameSpace = resolveNameSpace; + this.buildAttributesMap = buildAttributesMap; + this.isItStopNode = isItStopNode; + this.replaceEntitiesValue = replaceEntitiesValue; + this.readStopNodeData = readStopNodeData; + this.saveTextToParentTag = saveTextToParentTag; + this.addChild = addChild; + this.ignoreAttributesFn = getIgnoreAttributesFn(this.options.ignoreAttributes) + } + +} + +function addExternalEntities(externalEntities){ + const entKeys = Object.keys(externalEntities); + for (let i = 0; i < entKeys.length; i++) { + const ent = entKeys[i]; + this.lastEntities[ent] = { + regex: new RegExp("&"+ent+";","g"), + val : externalEntities[ent] + } + } +} + +/** + * @param {string} val + * @param {string} tagName + * @param {string} jPath + * @param {boolean} dontTrim + * @param {boolean} hasAttributes + * @param {boolean} isLeafNode + * @param {boolean} escapeEntities + */ +function parseTextData(val, tagName, jPath, dontTrim, hasAttributes, isLeafNode, escapeEntities) { + if (val !== undefined) { + if (this.options.trimValues && !dontTrim) { + val = val.trim(); + } + if(val.length > 0){ + if(!escapeEntities) val = this.replaceEntitiesValue(val); + + const newval = this.options.tagValueProcessor(tagName, val, jPath, hasAttributes, isLeafNode); + if(newval === null || newval === undefined){ + //don't parse + return val; + }else if(typeof newval !== typeof val || newval !== val){ + //overwrite + return newval; + }else if(this.options.trimValues){ + return parseValue(val, this.options.parseTagValue, this.options.numberParseOptions); + }else{ + const trimmedVal = val.trim(); + if(trimmedVal === val){ + return parseValue(val, this.options.parseTagValue, this.options.numberParseOptions); + }else{ + return val; + } + } + } + } +} + +function resolveNameSpace(tagname) { + if (this.options.removeNSPrefix) { + const tags = tagname.split(':'); + const prefix = tagname.charAt(0) === '/' ? '/' : ''; + if (tags[0] === 'xmlns') { + return ''; + } + if (tags.length === 2) { + tagname = prefix + tags[1]; + } + } + return tagname; +} + +//TODO: change regex to capture NS +//const attrsRegx = new RegExp("([\\w\\-\\.\\:]+)\\s*=\\s*(['\"])((.|\n)*?)\\2","gm"); +const attrsRegx = new RegExp('([^\\s=]+)\\s*(=\\s*([\'"])([\\s\\S]*?)\\3)?', 'gm'); + +function buildAttributesMap(attrStr, jPath, tagName) { + if (this.options.ignoreAttributes !== true && typeof attrStr === 'string') { + // attrStr = attrStr.replace(/\r?\n/g, ' '); + //attrStr = attrStr || attrStr.trim(); + + const matches = util.getAllMatches(attrStr, attrsRegx); + const len = matches.length; //don't make it inline + const attrs = {}; + for (let i = 0; i < len; i++) { + const attrName = this.resolveNameSpace(matches[i][1]); + if (this.ignoreAttributesFn(attrName, jPath)) { + continue + } + let oldVal = matches[i][4]; + let aName = this.options.attributeNamePrefix + attrName; + if (attrName.length) { + if (this.options.transformAttributeName) { + aName = this.options.transformAttributeName(aName); + } + if(aName === "__proto__") aName = "#__proto__"; + if (oldVal !== undefined) { + if (this.options.trimValues) { + oldVal = oldVal.trim(); + } + oldVal = this.replaceEntitiesValue(oldVal); + const newVal = this.options.attributeValueProcessor(attrName, oldVal, jPath); + if(newVal === null || newVal === undefined){ + //don't parse + attrs[aName] = oldVal; + }else if(typeof newVal !== typeof oldVal || newVal !== oldVal){ + //overwrite + attrs[aName] = newVal; + }else{ + //parse + attrs[aName] = parseValue( + oldVal, + this.options.parseAttributeValue, + this.options.numberParseOptions + ); + } + } else if (this.options.allowBooleanAttributes) { + attrs[aName] = true; + } + } + } + if (!Object.keys(attrs).length) { + return; + } + if (this.options.attributesGroupName) { + const attrCollection = {}; + attrCollection[this.options.attributesGroupName] = attrs; + return attrCollection; + } + return attrs + } +} + +const parseXml = function(xmlData) { + xmlData = xmlData.replace(/\r\n?/g, "\n"); //TODO: remove this line + const xmlObj = new xmlNode('!xml'); + let currentNode = xmlObj; + let textData = ""; + let jPath = ""; + for(let i=0; i< xmlData.length; i++){//for each char in XML data + const ch = xmlData[i]; + if(ch === '<'){ + // const nextIndex = i+1; + // const _2ndChar = xmlData[nextIndex]; + if( xmlData[i+1] === '/') {//Closing Tag + const closeIndex = findClosingIndex(xmlData, ">", i, "Closing Tag is not closed.") + let tagName = xmlData.substring(i+2,closeIndex).trim(); + + if(this.options.removeNSPrefix){ + const colonIndex = tagName.indexOf(":"); + if(colonIndex !== -1){ + tagName = tagName.substr(colonIndex+1); + } + } + + if(this.options.transformTagName) { + tagName = this.options.transformTagName(tagName); + } + + if(currentNode){ + textData = this.saveTextToParentTag(textData, currentNode, jPath); + } + + //check if last tag of nested tag was unpaired tag + const lastTagName = jPath.substring(jPath.lastIndexOf(".")+1); + if(tagName && this.options.unpairedTags.indexOf(tagName) !== -1 ){ + throw new Error(`Unpaired tag can not be used as closing tag: `); + } + let propIndex = 0 + if(lastTagName && this.options.unpairedTags.indexOf(lastTagName) !== -1 ){ + propIndex = jPath.lastIndexOf('.', jPath.lastIndexOf('.')-1) + this.tagsNodeStack.pop(); + }else{ + propIndex = jPath.lastIndexOf("."); + } + jPath = jPath.substring(0, propIndex); + + currentNode = this.tagsNodeStack.pop();//avoid recursion, set the parent tag scope + textData = ""; + i = closeIndex; + } else if( xmlData[i+1] === '?') { + + let tagData = readTagExp(xmlData,i, false, "?>"); + if(!tagData) throw new Error("Pi Tag is not closed."); + + textData = this.saveTextToParentTag(textData, currentNode, jPath); + if( (this.options.ignoreDeclaration && tagData.tagName === "?xml") || this.options.ignorePiTags){ + + }else{ + + const childNode = new xmlNode(tagData.tagName); + childNode.add(this.options.textNodeName, ""); + + if(tagData.tagName !== tagData.tagExp && tagData.attrExpPresent){ + childNode[":@"] = this.buildAttributesMap(tagData.tagExp, jPath, tagData.tagName); + } + this.addChild(currentNode, childNode, jPath) + + } + + + i = tagData.closeIndex + 1; + } else if(xmlData.substr(i + 1, 3) === '!--') { + const endIndex = findClosingIndex(xmlData, "-->", i+4, "Comment is not closed.") + if(this.options.commentPropName){ + const comment = xmlData.substring(i + 4, endIndex - 2); + + textData = this.saveTextToParentTag(textData, currentNode, jPath); + + currentNode.add(this.options.commentPropName, [ { [this.options.textNodeName] : comment } ]); + } + i = endIndex; + } else if( xmlData.substr(i + 1, 2) === '!D') { + const result = readDocType(xmlData, i); + this.docTypeEntities = result.entities; + i = result.i; + }else if(xmlData.substr(i + 1, 2) === '![') { + const closeIndex = findClosingIndex(xmlData, "]]>", i, "CDATA is not closed.") - 2; + const tagExp = xmlData.substring(i + 9,closeIndex); + + textData = this.saveTextToParentTag(textData, currentNode, jPath); + + let val = this.parseTextData(tagExp, currentNode.tagname, jPath, true, false, true, true); + if(val == undefined) val = ""; + + //cdata should be set even if it is 0 length string + if(this.options.cdataPropName){ + currentNode.add(this.options.cdataPropName, [ { [this.options.textNodeName] : tagExp } ]); + }else{ + currentNode.add(this.options.textNodeName, val); + } + + i = closeIndex + 2; + }else {//Opening tag + let result = readTagExp(xmlData,i, this.options.removeNSPrefix); + let tagName= result.tagName; + const rawTagName = result.rawTagName; + let tagExp = result.tagExp; + let attrExpPresent = result.attrExpPresent; + let closeIndex = result.closeIndex; + + if (this.options.transformTagName) { + tagName = this.options.transformTagName(tagName); + } + + //save text as child node + if (currentNode && textData) { + if(currentNode.tagname !== '!xml'){ + //when nested tag is found + textData = this.saveTextToParentTag(textData, currentNode, jPath, false); + } + } + + //check if last tag was unpaired tag + const lastTag = currentNode; + if(lastTag && this.options.unpairedTags.indexOf(lastTag.tagname) !== -1 ){ + currentNode = this.tagsNodeStack.pop(); + jPath = jPath.substring(0, jPath.lastIndexOf(".")); + } + if(tagName !== xmlObj.tagname){ + jPath += jPath ? "." + tagName : tagName; + } + if (this.isItStopNode(this.options.stopNodes, jPath, tagName)) { + let tagContent = ""; + //self-closing tag + if(tagExp.length > 0 && tagExp.lastIndexOf("/") === tagExp.length - 1){ + if(tagName[tagName.length - 1] === "/"){ //remove trailing '/' + tagName = tagName.substr(0, tagName.length - 1); + jPath = jPath.substr(0, jPath.length - 1); + tagExp = tagName; + }else{ + tagExp = tagExp.substr(0, tagExp.length - 1); + } + i = result.closeIndex; + } + //unpaired tag + else if(this.options.unpairedTags.indexOf(tagName) !== -1){ + + i = result.closeIndex; + } + //normal tag + else{ + //read until closing tag is found + const result = this.readStopNodeData(xmlData, rawTagName, closeIndex + 1); + if(!result) throw new Error(`Unexpected end of ${rawTagName}`); + i = result.i; + tagContent = result.tagContent; + } + + const childNode = new xmlNode(tagName); + if(tagName !== tagExp && attrExpPresent){ + childNode[":@"] = this.buildAttributesMap(tagExp, jPath, tagName); + } + if(tagContent) { + tagContent = this.parseTextData(tagContent, tagName, jPath, true, attrExpPresent, true, true); + } + + jPath = jPath.substr(0, jPath.lastIndexOf(".")); + childNode.add(this.options.textNodeName, tagContent); + + this.addChild(currentNode, childNode, jPath) + }else{ + //selfClosing tag + if(tagExp.length > 0 && tagExp.lastIndexOf("/") === tagExp.length - 1){ + if(tagName[tagName.length - 1] === "/"){ //remove trailing '/' + tagName = tagName.substr(0, tagName.length - 1); + jPath = jPath.substr(0, jPath.length - 1); + tagExp = tagName; + }else{ + tagExp = tagExp.substr(0, tagExp.length - 1); + } + + if(this.options.transformTagName) { + tagName = this.options.transformTagName(tagName); + } + + const childNode = new xmlNode(tagName); + if(tagName !== tagExp && attrExpPresent){ + childNode[":@"] = this.buildAttributesMap(tagExp, jPath, tagName); + } + this.addChild(currentNode, childNode, jPath) + jPath = jPath.substr(0, jPath.lastIndexOf(".")); + } + //opening tag + else{ + const childNode = new xmlNode( tagName); + this.tagsNodeStack.push(currentNode); + + if(tagName !== tagExp && attrExpPresent){ + childNode[":@"] = this.buildAttributesMap(tagExp, jPath, tagName); + } + this.addChild(currentNode, childNode, jPath) + currentNode = childNode; + } + textData = ""; + i = closeIndex; + } + } + }else{ + textData += xmlData[i]; + } + } + return xmlObj.child; +} + +function addChild(currentNode, childNode, jPath){ + const result = this.options.updateTag(childNode.tagname, jPath, childNode[":@"]) + if(result === false){ + }else if(typeof result === "string"){ + childNode.tagname = result + currentNode.addChild(childNode); + }else{ + currentNode.addChild(childNode); + } +} + +const replaceEntitiesValue = function(val){ + + if(this.options.processEntities){ + for(let entityName in this.docTypeEntities){ + const entity = this.docTypeEntities[entityName]; + val = val.replace( entity.regx, entity.val); + } + for(let entityName in this.lastEntities){ + const entity = this.lastEntities[entityName]; + val = val.replace( entity.regex, entity.val); + } + if(this.options.htmlEntities){ + for(let entityName in this.htmlEntities){ + const entity = this.htmlEntities[entityName]; + val = val.replace( entity.regex, entity.val); + } + } + val = val.replace( this.ampEntity.regex, this.ampEntity.val); + } + return val; +} +function saveTextToParentTag(textData, currentNode, jPath, isLeafNode) { + if (textData) { //store previously collected data as textNode + if(isLeafNode === undefined) isLeafNode = currentNode.child.length === 0 + + textData = this.parseTextData(textData, + currentNode.tagname, + jPath, + false, + currentNode[":@"] ? Object.keys(currentNode[":@"]).length !== 0 : false, + isLeafNode); + + if (textData !== undefined && textData !== "") + currentNode.add(this.options.textNodeName, textData); + textData = ""; + } + return textData; +} + +//TODO: use jPath to simplify the logic +/** + * + * @param {string[]} stopNodes + * @param {string} jPath + * @param {string} currentTagName + */ +function isItStopNode(stopNodes, jPath, currentTagName){ + const allNodesExp = "*." + currentTagName; + for (const stopNodePath in stopNodes) { + const stopNodeExp = stopNodes[stopNodePath]; + if( allNodesExp === stopNodeExp || jPath === stopNodeExp ) return true; + } + return false; +} + +/** + * Returns the tag Expression and where it is ending handling single-double quotes situation + * @param {string} xmlData + * @param {number} i starting index + * @returns + */ +function tagExpWithClosingIndex(xmlData, i, closingChar = ">"){ + let attrBoundary; + let tagExp = ""; + for (let index = i; index < xmlData.length; index++) { + let ch = xmlData[index]; + if (attrBoundary) { + if (ch === attrBoundary) attrBoundary = "";//reset + } else if (ch === '"' || ch === "'") { + attrBoundary = ch; + } else if (ch === closingChar[0]) { + if(closingChar[1]){ + if(xmlData[index + 1] === closingChar[1]){ + return { + data: tagExp, + index: index + } + } + }else{ + return { + data: tagExp, + index: index + } + } + } else if (ch === '\t') { + ch = " " + } + tagExp += ch; + } +} + +function findClosingIndex(xmlData, str, i, errMsg){ + const closingIndex = xmlData.indexOf(str, i); + if(closingIndex === -1){ + throw new Error(errMsg) + }else{ + return closingIndex + str.length - 1; + } +} + +function readTagExp(xmlData,i, removeNSPrefix, closingChar = ">"){ + const result = tagExpWithClosingIndex(xmlData, i+1, closingChar); + if(!result) return; + let tagExp = result.data; + const closeIndex = result.index; + const separatorIndex = tagExp.search(/\s/); + let tagName = tagExp; + let attrExpPresent = true; + if(separatorIndex !== -1){//separate tag name and attributes expression + tagName = tagExp.substring(0, separatorIndex); + tagExp = tagExp.substring(separatorIndex + 1).trimStart(); + } + + const rawTagName = tagName; + if(removeNSPrefix){ + const colonIndex = tagName.indexOf(":"); + if(colonIndex !== -1){ + tagName = tagName.substr(colonIndex+1); + attrExpPresent = tagName !== result.data.substr(colonIndex + 1); + } + } + + return { + tagName: tagName, + tagExp: tagExp, + closeIndex: closeIndex, + attrExpPresent: attrExpPresent, + rawTagName: rawTagName, + } +} +/** + * find paired tag for a stop node + * @param {string} xmlData + * @param {string} tagName + * @param {number} i + */ +function readStopNodeData(xmlData, tagName, i){ + const startIndex = i; + // Starting at 1 since we already have an open tag + let openTagCount = 1; + + for (; i < xmlData.length; i++) { + if( xmlData[i] === "<"){ + if (xmlData[i+1] === "/") {//close tag + const closeIndex = findClosingIndex(xmlData, ">", i, `${tagName} is not closed`); + let closeTagName = xmlData.substring(i+2,closeIndex).trim(); + if(closeTagName === tagName){ + openTagCount--; + if (openTagCount === 0) { + return { + tagContent: xmlData.substring(startIndex, i), + i : closeIndex + } + } + } + i=closeIndex; + } else if(xmlData[i+1] === '?') { + const closeIndex = findClosingIndex(xmlData, "?>", i+1, "StopNode is not closed.") + i=closeIndex; + } else if(xmlData.substr(i + 1, 3) === '!--') { + const closeIndex = findClosingIndex(xmlData, "-->", i+3, "StopNode is not closed.") + i=closeIndex; + } else if(xmlData.substr(i + 1, 2) === '![') { + const closeIndex = findClosingIndex(xmlData, "]]>", i, "StopNode is not closed.") - 2; + i=closeIndex; + } else { + const tagData = readTagExp(xmlData, i, '>') + + if (tagData) { + const openTagName = tagData && tagData.tagName; + if (openTagName === tagName && tagData.tagExp[tagData.tagExp.length-1] !== "/") { + openTagCount++; + } + i=tagData.closeIndex; + } + } + } + }//end for loop +} + +function parseValue(val, shouldParse, options) { + if (shouldParse && typeof val === 'string') { + //console.log(options) + const newval = val.trim(); + if(newval === 'true' ) return true; + else if(newval === 'false' ) return false; + else return toNumber(val, options); + } else { + if (util.isExist(val)) { + return val; + } else { + return ''; + } + } +} + + +module.exports = OrderedObjParser; diff --git a/node_modules/fast-xml-parser/src/xmlparser/XMLParser.js b/node_modules/fast-xml-parser/src/xmlparser/XMLParser.js new file mode 100644 index 00000000..ffaf59b5 --- /dev/null +++ b/node_modules/fast-xml-parser/src/xmlparser/XMLParser.js @@ -0,0 +1,58 @@ +const { buildOptions} = require("./OptionsBuilder"); +const OrderedObjParser = require("./OrderedObjParser"); +const { prettify} = require("./node2json"); +const validator = require('../validator'); + +class XMLParser{ + + constructor(options){ + this.externalEntities = {}; + this.options = buildOptions(options); + + } + /** + * Parse XML dats to JS object + * @param {string|Buffer} xmlData + * @param {boolean|Object} validationOption + */ + parse(xmlData,validationOption){ + if(typeof xmlData === "string"){ + }else if( xmlData.toString){ + xmlData = xmlData.toString(); + }else{ + throw new Error("XML data is accepted in String or Bytes[] form.") + } + if( validationOption){ + if(validationOption === true) validationOption = {}; //validate with default options + + const result = validator.validate(xmlData, validationOption); + if (result !== true) { + throw Error( `${result.err.msg}:${result.err.line}:${result.err.col}` ) + } + } + const orderedObjParser = new OrderedObjParser(this.options); + orderedObjParser.addExternalEntities(this.externalEntities); + const orderedResult = orderedObjParser.parseXml(xmlData); + if(this.options.preserveOrder || orderedResult === undefined) return orderedResult; + else return prettify(orderedResult, this.options); + } + + /** + * Add Entity which is not by default supported by this library + * @param {string} key + * @param {string} value + */ + addEntity(key, value){ + if(value.indexOf("&") !== -1){ + throw new Error("Entity value can't have '&'") + }else if(key.indexOf("&") !== -1 || key.indexOf(";") !== -1){ + throw new Error("An entity must be set without '&' and ';'. Eg. use '#xD' for ' '") + }else if(value === "&"){ + throw new Error("An entity with value '&' is not permitted"); + }else{ + this.externalEntities[key] = value; + } + } +} + +module.exports = XMLParser; \ No newline at end of file diff --git a/node_modules/fast-xml-parser/src/xmlparser/node2json.js b/node_modules/fast-xml-parser/src/xmlparser/node2json.js new file mode 100644 index 00000000..30455738 --- /dev/null +++ b/node_modules/fast-xml-parser/src/xmlparser/node2json.js @@ -0,0 +1,113 @@ +'use strict'; + +/** + * + * @param {array} node + * @param {any} options + * @returns + */ +function prettify(node, options){ + return compress( node, options); +} + +/** + * + * @param {array} arr + * @param {object} options + * @param {string} jPath + * @returns object + */ +function compress(arr, options, jPath){ + let text; + const compressedObj = {}; + for (let i = 0; i < arr.length; i++) { + const tagObj = arr[i]; + const property = propName(tagObj); + let newJpath = ""; + if(jPath === undefined) newJpath = property; + else newJpath = jPath + "." + property; + + if(property === options.textNodeName){ + if(text === undefined) text = tagObj[property]; + else text += "" + tagObj[property]; + }else if(property === undefined){ + continue; + }else if(tagObj[property]){ + + let val = compress(tagObj[property], options, newJpath); + const isLeaf = isLeafTag(val, options); + + if(tagObj[":@"]){ + assignAttributes( val, tagObj[":@"], newJpath, options); + }else if(Object.keys(val).length === 1 && val[options.textNodeName] !== undefined && !options.alwaysCreateTextNode){ + val = val[options.textNodeName]; + }else if(Object.keys(val).length === 0){ + if(options.alwaysCreateTextNode) val[options.textNodeName] = ""; + else val = ""; + } + + if(compressedObj[property] !== undefined && compressedObj.hasOwnProperty(property)) { + if(!Array.isArray(compressedObj[property])) { + compressedObj[property] = [ compressedObj[property] ]; + } + compressedObj[property].push(val); + }else{ + //TODO: if a node is not an array, then check if it should be an array + //also determine if it is a leaf node + if (options.isArray(property, newJpath, isLeaf )) { + compressedObj[property] = [val]; + }else{ + compressedObj[property] = val; + } + } + } + + } + // if(text && text.length > 0) compressedObj[options.textNodeName] = text; + if(typeof text === "string"){ + if(text.length > 0) compressedObj[options.textNodeName] = text; + }else if(text !== undefined) compressedObj[options.textNodeName] = text; + return compressedObj; +} + +function propName(obj){ + const keys = Object.keys(obj); + for (let i = 0; i < keys.length; i++) { + const key = keys[i]; + if(key !== ":@") return key; + } +} + +function assignAttributes(obj, attrMap, jpath, options){ + if (attrMap) { + const keys = Object.keys(attrMap); + const len = keys.length; //don't make it inline + for (let i = 0; i < len; i++) { + const atrrName = keys[i]; + if (options.isArray(atrrName, jpath + "." + atrrName, true, true)) { + obj[atrrName] = [ attrMap[atrrName] ]; + } else { + obj[atrrName] = attrMap[atrrName]; + } + } + } +} + +function isLeafTag(obj, options){ + const { textNodeName } = options; + const propCount = Object.keys(obj).length; + + if (propCount === 0) { + return true; + } + + if ( + propCount === 1 && + (obj[textNodeName] || typeof obj[textNodeName] === "boolean" || obj[textNodeName] === 0) + ) { + return true; + } + + return false; +} +exports.prettify = prettify; diff --git a/node_modules/fast-xml-parser/src/xmlparser/xmlNode.js b/node_modules/fast-xml-parser/src/xmlparser/xmlNode.js new file mode 100644 index 00000000..93195242 --- /dev/null +++ b/node_modules/fast-xml-parser/src/xmlparser/xmlNode.js @@ -0,0 +1,25 @@ +'use strict'; + +class XmlNode{ + constructor(tagname) { + this.tagname = tagname; + this.child = []; //nested tags, text, cdata, comments in order + this[":@"] = {}; //attributes map + } + add(key,val){ + // this.child.push( {name : key, val: val, isCdata: isCdata }); + if(key === "__proto__") key = "#__proto__"; + this.child.push( {[key]: val }); + } + addChild(node) { + if(node.tagname === "__proto__") node.tagname = "#__proto__"; + if(node[":@"] && Object.keys(node[":@"]).length > 0){ + this.child.push( { [node.tagname]: node.child, [":@"]: node[":@"] }); + }else{ + this.child.push( { [node.tagname]: node.child }); + } + }; +}; + + +module.exports = XmlNode; \ No newline at end of file diff --git a/node_modules/fetch-blob/LICENSE b/node_modules/fetch-blob/LICENSE new file mode 100644 index 00000000..0d317232 --- /dev/null +++ b/node_modules/fetch-blob/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2019 David Frank + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/node_modules/fetch-blob/README.md b/node_modules/fetch-blob/README.md new file mode 100644 index 00000000..fb3e1985 --- /dev/null +++ b/node_modules/fetch-blob/README.md @@ -0,0 +1,106 @@ +# fetch-blob + +[![npm version][npm-image]][npm-url] +[![build status][ci-image]][ci-url] +[![coverage status][codecov-image]][codecov-url] +[![install size][install-size-image]][install-size-url] + +A Blob implementation in Node.js, originally from [node-fetch](https://github.com/node-fetch/node-fetch). + +## Installation + +```sh +npm install fetch-blob +``` + +
+ Upgrading from 2x to 3x + + Updating from 2 to 3 should be a breeze since there is not many changes to the blob specification. + The major cause of a major release is coding standards. + - internal WeakMaps was replaced with private fields + - internal Buffer.from was replaced with TextEncoder/Decoder + - internal buffers was replaced with Uint8Arrays + - CommonJS was replaced with ESM + - The node stream returned by calling `blob.stream()` was replaced with whatwg streams + - (Read "Differences from other blobs" for more info.) + +
+ +
+ Differences from other Blobs + + - Unlike NodeJS `buffer.Blob` (Added in: v15.7.0) and browser native Blob this polyfilled version can't be sent via PostMessage + - This blob version is more arbitrary, it can be constructed with blob parts that isn't a instance of itself + it has to look and behave as a blob to be accepted as a blob part. + - The benefit of this is that you can create other types of blobs that don't contain any internal data that has to be read in other ways, such as the `BlobDataItem` created in `from.js` that wraps a file path into a blob-like item and read lazily (nodejs plans to [implement this][fs-blobs] as well) + - The `blob.stream()` is the most noticeable differences. It returns a WHATWG stream now. to keep it as a node stream you would have to do: + + ```js + import {Readable} from 'stream' + const stream = Readable.from(blob.stream()) + ``` +
+ +## Usage + +```js +// Ways to import +// (PS it's dependency free ESM package so regular http-import from CDN works too) +import Blob from 'fetch-blob' +import File from 'fetch-blob/file.js' + +import {Blob} from 'fetch-blob' +import {File} from 'fetch-blob/file.js' + +const {Blob} = await import('fetch-blob') + + +// Ways to read the blob: +const blob = new Blob(['hello, world']) + +await blob.text() +await blob.arrayBuffer() +for await (let chunk of blob.stream()) { ... } +blob.stream().getReader().read() +blob.stream().getReader({mode: 'byob'}).read(view) +``` + +### Blob part backed up by filesystem + +`fetch-blob/from.js` comes packed with tools to convert any filepath into either a Blob or a File +It will not read the content into memory. It will only stat the file for last modified date and file size. + +```js +// The default export is sync and use fs.stat to retrieve size & last modified as a blob +import blobFromSync from 'fetch-blob/from.js' +import {File, Blob, blobFrom, blobFromSync, fileFrom, fileFromSync} from 'fetch-blob/from.js' + +const fsFile = fileFromSync('./2-GiB-file.bin', 'application/octet-stream') +const fsBlob = await blobFrom('./2-GiB-file.mp4') + +// Not a 4 GiB memory snapshot, just holds references +// points to where data is located on the disk +const blob = new Blob([fsFile, fsBlob, 'memory', new Uint8Array(10)]) +console.log(blob.size) // ~4 GiB +``` + +`blobFrom|blobFromSync|fileFrom|fileFromSync(path, [mimetype])` + +### Creating Blobs backed up by other async sources +Our Blob & File class are more generic then any other polyfills in the way that it can accept any blob look-a-like item +An example of this is that our blob implementation can be constructed with parts coming from [BlobDataItem](https://github.com/node-fetch/fetch-blob/blob/8ef89adad40d255a3bbd55cf38b88597c1cd5480/from.js#L32) (aka a filepath) or from [buffer.Blob](https://nodejs.org/api/buffer.html#buffer_new_buffer_blob_sources_options), It dose not have to implement all the methods - just enough that it can be read/understood by our Blob implementation. The minium requirements is that it has `Symbol.toStringTag`, `size`, `slice()` and either a `stream()` or a `arrayBuffer()` method. If you then wrap it in our Blob or File `new Blob([blobDataItem])` then you get all of the other methods that should be implemented in a blob or file + +An example of this could be to create a file or blob like item coming from a remote HTTP request. Or from a DataBase + +See the [MDN documentation](https://developer.mozilla.org/en-US/docs/Web/API/Blob) and [tests](https://github.com/node-fetch/fetch-blob/blob/master/test.js) for more details of how to use the Blob. + +[npm-image]: https://flat.badgen.net/npm/v/fetch-blob +[npm-url]: https://www.npmjs.com/package/fetch-blob +[ci-image]: https://github.com/node-fetch/fetch-blob/workflows/CI/badge.svg +[ci-url]: https://github.com/node-fetch/fetch-blob/actions +[codecov-image]: https://flat.badgen.net/codecov/c/github/node-fetch/fetch-blob/master +[codecov-url]: https://codecov.io/gh/node-fetch/fetch-blob +[install-size-image]: https://flat.badgen.net/packagephobia/install/fetch-blob +[install-size-url]: https://packagephobia.now.sh/result?p=fetch-blob +[fs-blobs]: https://github.com/nodejs/node/issues/37340 diff --git a/node_modules/fetch-blob/file.d.ts b/node_modules/fetch-blob/file.d.ts new file mode 100644 index 00000000..d4b89bcf --- /dev/null +++ b/node_modules/fetch-blob/file.d.ts @@ -0,0 +1,2 @@ +/** @type {typeof globalThis.File} */ export const File: typeof globalThis.File; +export default File; diff --git a/node_modules/fetch-blob/file.js b/node_modules/fetch-blob/file.js new file mode 100644 index 00000000..7b26538f --- /dev/null +++ b/node_modules/fetch-blob/file.js @@ -0,0 +1,49 @@ +import Blob from './index.js' + +const _File = class File extends Blob { + #lastModified = 0 + #name = '' + + /** + * @param {*[]} fileBits + * @param {string} fileName + * @param {{lastModified?: number, type?: string}} options + */// @ts-ignore + constructor (fileBits, fileName, options = {}) { + if (arguments.length < 2) { + throw new TypeError(`Failed to construct 'File': 2 arguments required, but only ${arguments.length} present.`) + } + super(fileBits, options) + + if (options === null) options = {} + + // Simulate WebIDL type casting for NaN value in lastModified option. + const lastModified = options.lastModified === undefined ? Date.now() : Number(options.lastModified) + if (!Number.isNaN(lastModified)) { + this.#lastModified = lastModified + } + + this.#name = String(fileName) + } + + get name () { + return this.#name + } + + get lastModified () { + return this.#lastModified + } + + get [Symbol.toStringTag] () { + return 'File' + } + + static [Symbol.hasInstance] (object) { + return !!object && object instanceof Blob && + /^(File)$/.test(object[Symbol.toStringTag]) + } +} + +/** @type {typeof globalThis.File} */// @ts-ignore +export const File = _File +export default File diff --git a/node_modules/fetch-blob/from.d.ts b/node_modules/fetch-blob/from.d.ts new file mode 100644 index 00000000..530b99bf --- /dev/null +++ b/node_modules/fetch-blob/from.d.ts @@ -0,0 +1,26 @@ +export default blobFromSync; +/** + * @param {string} path filepath on the disk + * @param {string} [type] mimetype to use + */ +export function blobFromSync(path: string, type?: string): Blob; +import File from "./file.js"; +import Blob from "./index.js"; +/** + * @param {string} path filepath on the disk + * @param {string} [type] mimetype to use + * @returns {Promise} + */ +export function blobFrom(path: string, type?: string): Promise; +/** + * @param {string} path filepath on the disk + * @param {string} [type] mimetype to use + * @returns {Promise} + */ +export function fileFrom(path: string, type?: string): Promise; +/** + * @param {string} path filepath on the disk + * @param {string} [type] mimetype to use + */ +export function fileFromSync(path: string, type?: string): File; +export { File, Blob }; diff --git a/node_modules/fetch-blob/from.js b/node_modules/fetch-blob/from.js new file mode 100644 index 00000000..9eaf8bfc --- /dev/null +++ b/node_modules/fetch-blob/from.js @@ -0,0 +1,100 @@ +import { statSync, createReadStream, promises as fs } from 'node:fs' +import { basename } from 'node:path' +import DOMException from 'node-domexception' + +import File from './file.js' +import Blob from './index.js' + +const { stat } = fs + +/** + * @param {string} path filepath on the disk + * @param {string} [type] mimetype to use + */ +const blobFromSync = (path, type) => fromBlob(statSync(path), path, type) + +/** + * @param {string} path filepath on the disk + * @param {string} [type] mimetype to use + * @returns {Promise} + */ +const blobFrom = (path, type) => stat(path).then(stat => fromBlob(stat, path, type)) + +/** + * @param {string} path filepath on the disk + * @param {string} [type] mimetype to use + * @returns {Promise} + */ +const fileFrom = (path, type) => stat(path).then(stat => fromFile(stat, path, type)) + +/** + * @param {string} path filepath on the disk + * @param {string} [type] mimetype to use + */ +const fileFromSync = (path, type) => fromFile(statSync(path), path, type) + +// @ts-ignore +const fromBlob = (stat, path, type = '') => new Blob([new BlobDataItem({ + path, + size: stat.size, + lastModified: stat.mtimeMs, + start: 0 +})], { type }) + +// @ts-ignore +const fromFile = (stat, path, type = '') => new File([new BlobDataItem({ + path, + size: stat.size, + lastModified: stat.mtimeMs, + start: 0 +})], basename(path), { type, lastModified: stat.mtimeMs }) + +/** + * This is a blob backed up by a file on the disk + * with minium requirement. Its wrapped around a Blob as a blobPart + * so you have no direct access to this. + * + * @private + */ +class BlobDataItem { + #path + #start + + constructor (options) { + this.#path = options.path + this.#start = options.start + this.size = options.size + this.lastModified = options.lastModified + } + + /** + * Slicing arguments is first validated and formatted + * to not be out of range by Blob.prototype.slice + */ + slice (start, end) { + return new BlobDataItem({ + path: this.#path, + lastModified: this.lastModified, + size: end - start, + start: this.#start + start + }) + } + + async * stream () { + const { mtimeMs } = await stat(this.#path) + if (mtimeMs > this.lastModified) { + throw new DOMException('The requested file could not be read, typically due to permission problems that have occurred after a reference to a file was acquired.', 'NotReadableError') + } + yield * createReadStream(this.#path, { + start: this.#start, + end: this.#start + this.size - 1 + }) + } + + get [Symbol.toStringTag] () { + return 'Blob' + } +} + +export default blobFromSync +export { File, Blob, blobFrom, blobFromSync, fileFrom, fileFromSync } diff --git a/node_modules/fetch-blob/index.d.ts b/node_modules/fetch-blob/index.d.ts new file mode 100644 index 00000000..7a689577 --- /dev/null +++ b/node_modules/fetch-blob/index.d.ts @@ -0,0 +1,3 @@ +/** @type {typeof globalThis.Blob} */ +export const Blob: typeof globalThis.Blob; +export default Blob; diff --git a/node_modules/fetch-blob/index.js b/node_modules/fetch-blob/index.js new file mode 100644 index 00000000..2542ac26 --- /dev/null +++ b/node_modules/fetch-blob/index.js @@ -0,0 +1,250 @@ +/*! fetch-blob. MIT License. Jimmy Wärting */ + +// TODO (jimmywarting): in the feature use conditional loading with top level await (requires 14.x) +// Node has recently added whatwg stream into core + +import './streams.cjs' + +// 64 KiB (same size chrome slice theirs blob into Uint8array's) +const POOL_SIZE = 65536 + +/** @param {(Blob | Uint8Array)[]} parts */ +async function * toIterator (parts, clone = true) { + for (const part of parts) { + if ('stream' in part) { + yield * (/** @type {AsyncIterableIterator} */ (part.stream())) + } else if (ArrayBuffer.isView(part)) { + if (clone) { + let position = part.byteOffset + const end = part.byteOffset + part.byteLength + while (position !== end) { + const size = Math.min(end - position, POOL_SIZE) + const chunk = part.buffer.slice(position, position + size) + position += chunk.byteLength + yield new Uint8Array(chunk) + } + } else { + yield part + } + /* c8 ignore next 10 */ + } else { + // For blobs that have arrayBuffer but no stream method (nodes buffer.Blob) + let position = 0, b = (/** @type {Blob} */ (part)) + while (position !== b.size) { + const chunk = b.slice(position, Math.min(b.size, position + POOL_SIZE)) + const buffer = await chunk.arrayBuffer() + position += buffer.byteLength + yield new Uint8Array(buffer) + } + } + } +} + +const _Blob = class Blob { + /** @type {Array.<(Blob|Uint8Array)>} */ + #parts = [] + #type = '' + #size = 0 + #endings = 'transparent' + + /** + * The Blob() constructor returns a new Blob object. The content + * of the blob consists of the concatenation of the values given + * in the parameter array. + * + * @param {*} blobParts + * @param {{ type?: string, endings?: string }} [options] + */ + constructor (blobParts = [], options = {}) { + if (typeof blobParts !== 'object' || blobParts === null) { + throw new TypeError('Failed to construct \'Blob\': The provided value cannot be converted to a sequence.') + } + + if (typeof blobParts[Symbol.iterator] !== 'function') { + throw new TypeError('Failed to construct \'Blob\': The object must have a callable @@iterator property.') + } + + if (typeof options !== 'object' && typeof options !== 'function') { + throw new TypeError('Failed to construct \'Blob\': parameter 2 cannot convert to dictionary.') + } + + if (options === null) options = {} + + const encoder = new TextEncoder() + for (const element of blobParts) { + let part + if (ArrayBuffer.isView(element)) { + part = new Uint8Array(element.buffer.slice(element.byteOffset, element.byteOffset + element.byteLength)) + } else if (element instanceof ArrayBuffer) { + part = new Uint8Array(element.slice(0)) + } else if (element instanceof Blob) { + part = element + } else { + part = encoder.encode(`${element}`) + } + + this.#size += ArrayBuffer.isView(part) ? part.byteLength : part.size + this.#parts.push(part) + } + + this.#endings = `${options.endings === undefined ? 'transparent' : options.endings}` + const type = options.type === undefined ? '' : String(options.type) + this.#type = /^[\x20-\x7E]*$/.test(type) ? type : '' + } + + /** + * The Blob interface's size property returns the + * size of the Blob in bytes. + */ + get size () { + return this.#size + } + + /** + * The type property of a Blob object returns the MIME type of the file. + */ + get type () { + return this.#type + } + + /** + * The text() method in the Blob interface returns a Promise + * that resolves with a string containing the contents of + * the blob, interpreted as UTF-8. + * + * @return {Promise} + */ + async text () { + // More optimized than using this.arrayBuffer() + // that requires twice as much ram + const decoder = new TextDecoder() + let str = '' + for await (const part of toIterator(this.#parts, false)) { + str += decoder.decode(part, { stream: true }) + } + // Remaining + str += decoder.decode() + return str + } + + /** + * The arrayBuffer() method in the Blob interface returns a + * Promise that resolves with the contents of the blob as + * binary data contained in an ArrayBuffer. + * + * @return {Promise} + */ + async arrayBuffer () { + // Easier way... Just a unnecessary overhead + // const view = new Uint8Array(this.size); + // await this.stream().getReader({mode: 'byob'}).read(view); + // return view.buffer; + + const data = new Uint8Array(this.size) + let offset = 0 + for await (const chunk of toIterator(this.#parts, false)) { + data.set(chunk, offset) + offset += chunk.length + } + + return data.buffer + } + + stream () { + const it = toIterator(this.#parts, true) + + return new globalThis.ReadableStream({ + // @ts-ignore + type: 'bytes', + async pull (ctrl) { + const chunk = await it.next() + chunk.done ? ctrl.close() : ctrl.enqueue(chunk.value) + }, + + async cancel () { + await it.return() + } + }) + } + + /** + * The Blob interface's slice() method creates and returns a + * new Blob object which contains data from a subset of the + * blob on which it's called. + * + * @param {number} [start] + * @param {number} [end] + * @param {string} [type] + */ + slice (start = 0, end = this.size, type = '') { + const { size } = this + + let relativeStart = start < 0 ? Math.max(size + start, 0) : Math.min(start, size) + let relativeEnd = end < 0 ? Math.max(size + end, 0) : Math.min(end, size) + + const span = Math.max(relativeEnd - relativeStart, 0) + const parts = this.#parts + const blobParts = [] + let added = 0 + + for (const part of parts) { + // don't add the overflow to new blobParts + if (added >= span) { + break + } + + const size = ArrayBuffer.isView(part) ? part.byteLength : part.size + if (relativeStart && size <= relativeStart) { + // Skip the beginning and change the relative + // start & end position as we skip the unwanted parts + relativeStart -= size + relativeEnd -= size + } else { + let chunk + if (ArrayBuffer.isView(part)) { + chunk = part.subarray(relativeStart, Math.min(size, relativeEnd)) + added += chunk.byteLength + } else { + chunk = part.slice(relativeStart, Math.min(size, relativeEnd)) + added += chunk.size + } + relativeEnd -= size + blobParts.push(chunk) + relativeStart = 0 // All next sequential parts should start at 0 + } + } + + const blob = new Blob([], { type: String(type).toLowerCase() }) + blob.#size = span + blob.#parts = blobParts + + return blob + } + + get [Symbol.toStringTag] () { + return 'Blob' + } + + static [Symbol.hasInstance] (object) { + return ( + object && + typeof object === 'object' && + typeof object.constructor === 'function' && + ( + typeof object.stream === 'function' || + typeof object.arrayBuffer === 'function' + ) && + /^(Blob|File)$/.test(object[Symbol.toStringTag]) + ) + } +} + +Object.defineProperties(_Blob.prototype, { + size: { enumerable: true }, + type: { enumerable: true }, + slice: { enumerable: true } +}) + +/** @type {typeof globalThis.Blob} */ +export const Blob = _Blob +export default Blob diff --git a/node_modules/fetch-blob/package.json b/node_modules/fetch-blob/package.json new file mode 100644 index 00000000..9d07f397 --- /dev/null +++ b/node_modules/fetch-blob/package.json @@ -0,0 +1,56 @@ +{ + "name": "fetch-blob", + "version": "3.2.0", + "description": "Blob & File implementation in Node.js, originally from node-fetch.", + "main": "index.js", + "type": "module", + "files": [ + "from.js", + "file.js", + "file.d.ts", + "index.js", + "index.d.ts", + "from.d.ts", + "streams.cjs" + ], + "scripts": { + "test": "node --experimental-loader ./test/http-loader.js ./test/test-wpt-in-node.js", + "report": "c8 --reporter json --reporter text npm run test", + "coverage": "npm run report && codecov -f coverage/coverage-final.json", + "prepublishOnly": "tsc --declaration --emitDeclarationOnly --allowJs index.js from.js" + }, + "repository": "https://github.com/node-fetch/fetch-blob.git", + "keywords": [ + "blob", + "file", + "node-fetch" + ], + "engines": { + "node": "^12.20 || >= 14.13" + }, + "author": "Jimmy Wärting (https://jimmy.warting.se)", + "license": "MIT", + "bugs": { + "url": "https://github.com/node-fetch/fetch-blob/issues" + }, + "homepage": "https://github.com/node-fetch/fetch-blob#readme", + "devDependencies": { + "@types/node": "^17.0.9", + "c8": "^7.11.0", + "typescript": "^4.5.4" + }, + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/jimmywarting" + }, + { + "type": "paypal", + "url": "https://paypal.me/jimmywarting" + } + ], + "dependencies": { + "node-domexception": "^1.0.0", + "web-streams-polyfill": "^3.0.3" + } +} diff --git a/node_modules/fetch-blob/streams.cjs b/node_modules/fetch-blob/streams.cjs new file mode 100644 index 00000000..f7609596 --- /dev/null +++ b/node_modules/fetch-blob/streams.cjs @@ -0,0 +1,51 @@ +/* c8 ignore start */ +// 64 KiB (same size chrome slice theirs blob into Uint8array's) +const POOL_SIZE = 65536 + +if (!globalThis.ReadableStream) { + // `node:stream/web` got introduced in v16.5.0 as experimental + // and it's preferred over the polyfilled version. So we also + // suppress the warning that gets emitted by NodeJS for using it. + try { + const process = require('node:process') + const { emitWarning } = process + try { + process.emitWarning = () => {} + Object.assign(globalThis, require('node:stream/web')) + process.emitWarning = emitWarning + } catch (error) { + process.emitWarning = emitWarning + throw error + } + } catch (error) { + // fallback to polyfill implementation + Object.assign(globalThis, require('web-streams-polyfill/dist/ponyfill.es2018.js')) + } +} + +try { + // Don't use node: prefix for this, require+node: is not supported until node v14.14 + // Only `import()` can use prefix in 12.20 and later + const { Blob } = require('buffer') + if (Blob && !Blob.prototype.stream) { + Blob.prototype.stream = function name (params) { + let position = 0 + const blob = this + + return new ReadableStream({ + type: 'bytes', + async pull (ctrl) { + const chunk = blob.slice(position, Math.min(blob.size, position + POOL_SIZE)) + const buffer = await chunk.arrayBuffer() + position += buffer.byteLength + ctrl.enqueue(new Uint8Array(buffer)) + + if (position === blob.size) { + ctrl.close() + } + } + }) + } + } +} catch (error) {} +/* c8 ignore end */ diff --git a/node_modules/formdata-polyfill/FormData.js b/node_modules/formdata-polyfill/FormData.js new file mode 100644 index 00000000..8e736605 --- /dev/null +++ b/node_modules/formdata-polyfill/FormData.js @@ -0,0 +1,441 @@ +/* formdata-polyfill. MIT License. Jimmy Wärting */ + +/* global FormData self Blob File */ +/* eslint-disable no-inner-declarations */ + +if (typeof Blob !== 'undefined' && (typeof FormData === 'undefined' || !FormData.prototype.keys)) { + const global = typeof globalThis === 'object' + ? globalThis + : typeof window === 'object' + ? window + : typeof self === 'object' ? self : this + + // keep a reference to native implementation + const _FormData = global.FormData + + // To be monkey patched + const _send = global.XMLHttpRequest && global.XMLHttpRequest.prototype.send + const _fetch = global.Request && global.fetch + const _sendBeacon = global.navigator && global.navigator.sendBeacon + // Might be a worker thread... + const _match = global.Element && global.Element.prototype + + // Unable to patch Request/Response constructor correctly #109 + // only way is to use ES6 class extend + // https://github.com/babel/babel/issues/1966 + + const stringTag = global.Symbol && Symbol.toStringTag + + // Add missing stringTags to blob and files + if (stringTag) { + if (!Blob.prototype[stringTag]) { + Blob.prototype[stringTag] = 'Blob' + } + + if ('File' in global && !File.prototype[stringTag]) { + File.prototype[stringTag] = 'File' + } + } + + // Fix so you can construct your own File + try { + new File([], '') // eslint-disable-line + } catch (a) { + global.File = function File (b, d, c) { + const blob = new Blob(b, c || {}) + const t = c && void 0 !== c.lastModified ? new Date(c.lastModified) : new Date() + + Object.defineProperties(blob, { + name: { + value: d + }, + lastModified: { + value: +t + }, + toString: { + value () { + return '[object File]' + } + } + }) + + if (stringTag) { + Object.defineProperty(blob, stringTag, { + value: 'File' + }) + } + + return blob + } + } + + function ensureArgs (args, expected) { + if (args.length < expected) { + throw new TypeError(`${expected} argument required, but only ${args.length} present.`) + } + } + + /** + * @param {string} name + * @param {string | undefined} filename + * @returns {[string, File|string]} + */ + function normalizeArgs (name, value, filename) { + if (value instanceof Blob) { + filename = filename !== undefined + ? String(filename + '') + : typeof value.name === 'string' + ? value.name + : 'blob' + + if (value.name !== filename || Object.prototype.toString.call(value) === '[object Blob]') { + value = new File([value], filename) + } + return [String(name), value] + } + return [String(name), String(value)] + } + + // normalize line feeds for textarea + // https://html.spec.whatwg.org/multipage/form-elements.html#textarea-line-break-normalisation-transformation + function normalizeLinefeeds (value) { + return value.replace(/\r?\n|\r/g, '\r\n') + } + + /** + * @template T + * @param {ArrayLike} arr + * @param {{ (elm: T): void; }} cb + */ + function each (arr, cb) { + for (let i = 0; i < arr.length; i++) { + cb(arr[i]) + } + } + + const escape = str => str.replace(/\n/g, '%0A').replace(/\r/g, '%0D').replace(/"/g, '%22') + + /** + * @implements {Iterable} + */ + class FormDataPolyfill { + /** + * FormData class + * + * @param {HTMLFormElement=} form + */ + constructor (form) { + /** @type {[string, string|File][]} */ + this._data = [] + + const self = this + form && each(form.elements, (/** @type {HTMLInputElement} */ elm) => { + if ( + !elm.name || + elm.disabled || + elm.type === 'submit' || + elm.type === 'button' || + elm.matches('form fieldset[disabled] *') + ) return + + if (elm.type === 'file') { + const files = elm.files && elm.files.length + ? elm.files + : [new File([], '', { type: 'application/octet-stream' })] // #78 + + each(files, file => { + self.append(elm.name, file) + }) + } else if (elm.type === 'select-multiple' || elm.type === 'select-one') { + each(elm.options, opt => { + !opt.disabled && opt.selected && self.append(elm.name, opt.value) + }) + } else if (elm.type === 'checkbox' || elm.type === 'radio') { + if (elm.checked) self.append(elm.name, elm.value) + } else { + const value = elm.type === 'textarea' ? normalizeLinefeeds(elm.value) : elm.value + self.append(elm.name, value) + } + }) + } + + /** + * Append a field + * + * @param {string} name field name + * @param {string|Blob|File} value string / blob / file + * @param {string=} filename filename to use with blob + * @return {undefined} + */ + append (name, value, filename) { + ensureArgs(arguments, 2) + this._data.push(normalizeArgs(name, value, filename)) + } + + /** + * Delete all fields values given name + * + * @param {string} name Field name + * @return {undefined} + */ + delete (name) { + ensureArgs(arguments, 1) + const result = [] + name = String(name) + + each(this._data, entry => { + entry[0] !== name && result.push(entry) + }) + + this._data = result + } + + /** + * Iterate over all fields as [name, value] + * + * @return {Iterator} + */ + * entries () { + for (var i = 0; i < this._data.length; i++) { + yield this._data[i] + } + } + + /** + * Iterate over all fields + * + * @param {Function} callback Executed for each item with parameters (value, name, thisArg) + * @param {Object=} thisArg `this` context for callback function + */ + forEach (callback, thisArg) { + ensureArgs(arguments, 1) + for (const [name, value] of this) { + callback.call(thisArg, value, name, this) + } + } + + /** + * Return first field value given name + * or null if non existent + * + * @param {string} name Field name + * @return {string|File|null} value Fields value + */ + get (name) { + ensureArgs(arguments, 1) + const entries = this._data + name = String(name) + for (let i = 0; i < entries.length; i++) { + if (entries[i][0] === name) { + return entries[i][1] + } + } + return null + } + + /** + * Return all fields values given name + * + * @param {string} name Fields name + * @return {Array} [{String|File}] + */ + getAll (name) { + ensureArgs(arguments, 1) + const result = [] + name = String(name) + each(this._data, data => { + data[0] === name && result.push(data[1]) + }) + + return result + } + + /** + * Check for field name existence + * + * @param {string} name Field name + * @return {boolean} + */ + has (name) { + ensureArgs(arguments, 1) + name = String(name) + for (let i = 0; i < this._data.length; i++) { + if (this._data[i][0] === name) { + return true + } + } + return false + } + + /** + * Iterate over all fields name + * + * @return {Iterator} + */ + * keys () { + for (const [name] of this) { + yield name + } + } + + /** + * Overwrite all values given name + * + * @param {string} name Filed name + * @param {string} value Field value + * @param {string=} filename Filename (optional) + */ + set (name, value, filename) { + ensureArgs(arguments, 2) + name = String(name) + /** @type {[string, string|File][]} */ + const result = [] + const args = normalizeArgs(name, value, filename) + let replace = true + + // - replace the first occurrence with same name + // - discards the remaining with same name + // - while keeping the same order items where added + each(this._data, data => { + data[0] === name + ? replace && (replace = !result.push(args)) + : result.push(data) + }) + + replace && result.push(args) + + this._data = result + } + + /** + * Iterate over all fields + * + * @return {Iterator} + */ + * values () { + for (const [, value] of this) { + yield value + } + } + + /** + * Return a native (perhaps degraded) FormData with only a `append` method + * Can throw if it's not supported + * + * @return {FormData} + */ + ['_asNative'] () { + const fd = new _FormData() + + for (const [name, value] of this) { + fd.append(name, value) + } + + return fd + } + + /** + * [_blob description] + * + * @return {Blob} [description] + */ + ['_blob'] () { + const boundary = '----formdata-polyfill-' + Math.random(), + chunks = [], + p = `--${boundary}\r\nContent-Disposition: form-data; name="` + this.forEach((value, name) => typeof value == 'string' + ? chunks.push(p + escape(normalizeLinefeeds(name)) + `"\r\n\r\n${normalizeLinefeeds(value)}\r\n`) + : chunks.push(p + escape(normalizeLinefeeds(name)) + `"; filename="${escape(value.name)}"\r\nContent-Type: ${value.type||"application/octet-stream"}\r\n\r\n`, value, `\r\n`)) + chunks.push(`--${boundary}--`) + return new Blob(chunks, { + type: "multipart/form-data; boundary=" + boundary + }) + } + + /** + * The class itself is iterable + * alias for formdata.entries() + * + * @return {Iterator} + */ + [Symbol.iterator] () { + return this.entries() + } + + /** + * Create the default string description. + * + * @return {string} [object FormData] + */ + toString () { + return '[object FormData]' + } + } + + if (_match && !_match.matches) { + _match.matches = + _match.matchesSelector || + _match.mozMatchesSelector || + _match.msMatchesSelector || + _match.oMatchesSelector || + _match.webkitMatchesSelector || + function (s) { + var matches = (this.document || this.ownerDocument).querySelectorAll(s) + var i = matches.length + while (--i >= 0 && matches.item(i) !== this) {} + return i > -1 + } + } + + if (stringTag) { + /** + * Create the default string description. + * It is accessed internally by the Object.prototype.toString(). + */ + FormDataPolyfill.prototype[stringTag] = 'FormData' + } + + // Patch xhr's send method to call _blob transparently + if (_send) { + const setRequestHeader = global.XMLHttpRequest.prototype.setRequestHeader + + global.XMLHttpRequest.prototype.setRequestHeader = function (name, value) { + setRequestHeader.call(this, name, value) + if (name.toLowerCase() === 'content-type') this._hasContentType = true + } + + global.XMLHttpRequest.prototype.send = function (data) { + // need to patch send b/c old IE don't send blob's type (#44) + if (data instanceof FormDataPolyfill) { + const blob = data['_blob']() + if (!this._hasContentType) this.setRequestHeader('Content-Type', blob.type) + _send.call(this, blob) + } else { + _send.call(this, data) + } + } + } + + // Patch fetch's function to call _blob transparently + if (_fetch) { + global.fetch = function (input, init) { + if (init && init.body && init.body instanceof FormDataPolyfill) { + init.body = init.body['_blob']() + } + + return _fetch.call(this, input, init) + } + } + + // Patch navigator.sendBeacon to use native FormData + if (_sendBeacon) { + global.navigator.sendBeacon = function (url, data) { + if (data instanceof FormDataPolyfill) { + data = data['_asNative']() + } + return _sendBeacon.call(this, url, data) + } + } + + global['FormData'] = FormDataPolyfill +} diff --git a/node_modules/formdata-polyfill/LICENSE b/node_modules/formdata-polyfill/LICENSE new file mode 100644 index 00000000..fd0f555a --- /dev/null +++ b/node_modules/formdata-polyfill/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2016 Jimmy Karl Roland Wärting + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/node_modules/formdata-polyfill/README.md b/node_modules/formdata-polyfill/README.md new file mode 100644 index 00000000..8355299a --- /dev/null +++ b/node_modules/formdata-polyfill/README.md @@ -0,0 +1,145 @@ +### A `FormData` polyfill for the browser ...and a module for NodeJS (`New!`) + +```bash +npm install formdata-polyfill +``` + +The browser polyfill will likely have done its part already, and i hope you stop supporting old browsers c",)
+But NodeJS still laks a proper FormData
The good old form-data package is a very old and isn't spec compatible and dose some abnormal stuff to construct and read FormData instances that other http libraries are not happy about when it comes to follow the spec. + +### The NodeJS / ESM version +- The modular (~2.3 KiB minified uncompressed) version of this package is independent of any browser stuff and don't patch anything +- It's as pure/spec compatible as it possible gets the test are run by WPT. +- It's compatible with [node-fetch](https://github.com/node-fetch/node-fetch). +- It have higher platform dependencies as it uses classes, symbols, ESM & private fields +- Only dependency it has is [fetch-blob](https://github.com/node-fetch/fetch-blob) + +```js +// Node example +import fetch from 'node-fetch' +import File from 'fetch-blob/file.js' +import { fileFromSync } from 'fetch-blob/from.js' +import { FormData } from 'formdata-polyfill/esm.min.js' + +const file = fileFromSync('./README.md') +const fd = new FormData() + +fd.append('file-upload', new File(['abc'], 'hello-world.txt')) +fd.append('file-upload', file) + +// it's also possible to append file/blob look-a-like items +// if you have streams coming from other destinations +fd.append('file-upload', { + size: 123, + type: '', + name: 'cat-video.mp4', + stream() { return stream }, + [Symbol.toStringTag]: 'File' +}) + +fetch('https://httpbin.org/post', { method: 'POST', body: fd }) +``` + +---- + +It also comes with way to convert FormData into Blobs - it's not something that every developer should have to deal with. +It's mainly for [node-fetch](https://github.com/node-fetch/node-fetch) and other http library to ease the process of serializing a FormData into a blob and just wish to deal with Blobs instead (Both Deno and Undici adapted a version of this [formDataToBlob](https://github.com/jimmywarting/FormData/blob/5ddea9e0de2fc5e246ab1b2f9d404dee0c319c02/formdata-to-blob.js) to the core and passes all WPT tests run by the browser itself) +```js +import { Readable } from 'node:stream' +import { FormData, formDataToBlob } from 'formdata-polyfill/esm.min.js' + +const blob = formDataToBlob(new FormData()) +fetch('https://httpbin.org/post', { method: 'POST', body: blob }) + +// node built in http and other similar http library have to do: +const stream = Readable.from(blob.stream()) +const req = http.request('http://httpbin.org/post', { + method: 'post', + headers: { + 'Content-Length': blob.size, + 'Content-Type': blob.type + } +}) +stream.pipe(req) +``` + +PS: blob & file that are appended to the FormData will not be read until any of the serialized blob read-methods gets called +...so uploading very large files is no biggie + +### Browser polyfill + +usage: + +```js +import 'formdata-polyfill' // that's it +``` + +The browser polyfill conditionally replaces the native implementation rather than fixing the missing functions, +since otherwise there is no way to get or delete existing values in the FormData object. +Therefore this also patches `XMLHttpRequest.prototype.send` and `fetch` to send the `FormData` as a blob, +and `navigator.sendBeacon` to send native `FormData`. + +I was unable to patch the Response/Request constructor +so if you are constructing them with FormData then you need to call `fd._blob()` manually. + +```js +new Request(url, { + method: 'post', + body: fd._blob ? fd._blob() : fd +}) +``` + +Dependencies +--- + +If you need to support IE <= 9 then I recommend you to include eligrey's [blob.js] +(which i hope you don't - since IE is now dead) + +
+ Updating from 2.x to 3.x + +Previously you had to import the polyfill and use that, +since it didn't replace the global (existing) FormData implementation. +But now it transparently calls `_blob()` for you when you are sending something with fetch or XHR, +by way of monkey-patching the `XMLHttpRequest.prototype.send` and `fetch` functions. + +So you maybe had something like this: + +```javascript +var FormData = require('formdata-polyfill') +var fd = new FormData(form) +xhr.send(fd._blob()) +``` + +There is no longer anything exported from the module +(though you of course still need to import it to install the polyfill), +so you can now use the FormData object as normal: + +```javascript +require('formdata-polyfill') +var fd = new FormData(form) +xhr.send(fd) +``` + +
+ + + +Native Browser compatibility (as of 2021-05-08) +--- +Based on this you can decide for yourself if you need this polyfill. + +[![screenshot](https://user-images.githubusercontent.com/1148376/117550329-0993aa80-b040-11eb-976c-14e31f1a3ba4.png)](https://developer.mozilla.org/en-US/docs/Web/API/FormData#Browser_compatibility) + + + +This normalizes support for the FormData API: + + - `append` with filename + - `delete()`, `get()`, `getAll()`, `has()`, `set()` + - `entries()`, `keys()`, `values()`, and support for `for...of` + - Available in web workers (just include the polyfill) + + [npm-image]: https://img.shields.io/npm/v/formdata-polyfill.svg + [npm-url]: https://www.npmjs.com/package/formdata-polyfill + [blob.js]: https://github.com/eligrey/Blob.js diff --git a/node_modules/formdata-polyfill/esm.min.d.ts b/node_modules/formdata-polyfill/esm.min.d.ts new file mode 100644 index 00000000..b45f42ea --- /dev/null +++ b/node_modules/formdata-polyfill/esm.min.d.ts @@ -0,0 +1,5 @@ +export declare const FormData: { + new (): FormData; + prototype: FormData; +}; +export declare function formDataToBlob(formData: FormData): Blob; diff --git a/node_modules/formdata-polyfill/esm.min.js b/node_modules/formdata-polyfill/esm.min.js new file mode 100644 index 00000000..745ca290 --- /dev/null +++ b/node_modules/formdata-polyfill/esm.min.js @@ -0,0 +1,40 @@ +/*! formdata-polyfill. MIT License. Jimmy Wärting */ + +import C from 'fetch-blob' +import F from 'fetch-blob/file.js' + +var {toStringTag:t,iterator:i,hasInstance:h}=Symbol, +r=Math.random, +m='append,set,get,getAll,delete,keys,values,entries,forEach,constructor'.split(','), +f=(a,b,c)=>(a+='',/^(Blob|File)$/.test(b && b[t])?[(c=c!==void 0?c+'':b[t]=='File'?b.name:'blob',a),b.name!==c||b[t]=='blob'?new F([b],c,b):b]:[a,b+'']), +e=(c,f)=>(f?c:c.replace(/\r?\n|\r/g,'\r\n')).replace(/\n/g,'%0A').replace(/\r/g,'%0D').replace(/"/g,'%22'), +x=(n, a, e)=>{if(a.lengthtypeof o[m]!='function')} +append(...a){x('append',arguments,2);this.#d.push(f(...a))} +delete(a){x('delete',arguments,1);a+='';this.#d=this.#d.filter(([b])=>b!==a)} +get(a){x('get',arguments,1);a+='';for(var b=this.#d,l=b.length,c=0;cc[0]===a&&b.push(c[1]));return b} +has(a){x('has',arguments,1);a+='';return this.#d.some(b=>b[0]===a)} +forEach(a,b){x('forEach',arguments,1);for(var [c,d]of this)a.call(b,d,c,this)} +set(...a){x('set',arguments,2);var b=[],c=!0;a=f(...a);this.#d.forEach(d=>{d[0]===a[0]?c&&(c=!b.push(a)):b.push(d)});c&&b.push(a);this.#d=b} +*entries(){yield*this.#d} +*keys(){for(var[a]of this)yield a} +*values(){for(var[,a]of this)yield a}} + +/** @param {FormData} F */ +export function formDataToBlob (F,B=C){ +var b=`${r()}${r()}`.replace(/\./g, '').slice(-28).padStart(32, '-'),c=[],p=`--${b}\r\nContent-Disposition: form-data; name="` +F.forEach((v,n)=>typeof v=='string' +?c.push(p+e(n)+`"\r\n\r\n${v.replace(/\r(?!\n)|(? */ + +const escape = (str, filename) => + (filename ? str : str.replace(/\r?\n|\r/g, '\r\n')) + .replace(/\n/g, '%0A') + .replace(/\r/g, '%0D') + .replace(/"/g, '%22') + +/** + * pure function to convert any formData instance to a Blob + * instances synchronous without reading all of the files + * + * @param {FormData|*} formData an instance of a formData Class + * @param {Blob|*} [BlobClass=Blob] the Blob class to use when constructing it + */ +export function formDataToBlob (formData, BlobClass = Blob) { + const boundary = ('----formdata-polyfill-' + Math.random()) + const chunks = [] + const prefix = `--${boundary}\r\nContent-Disposition: form-data; name="` + + for (let [name, value] of formData) { + if (typeof value === 'string') { + chunks.push(prefix + escape(name) + `"\r\n\r\n${value.replace(/\r(?!\n)|(? */ +;(function(){var h;function l(a){var b=0;return function(){return b>>0)+"_",e=0;return b}); +r("Symbol.iterator",function(a){if(a)return a;a=Symbol("Symbol.iterator");for(var b="Array Int8Array Uint8Array Uint8ClampedArray Int16Array Uint16Array Int32Array Uint32Array Float32Array Float64Array".split(" "),c=0;c=12.20.0" + }, + "keywords": [ + "formdata", + "fetch", + "node-fetch", + "html5", + "browser", + "polyfill" + ], + "author": "Jimmy Wärting", + "license": "MIT", + "bugs": { + "url": "https://github.com/jimmywarting/FormData/issues" + }, + "homepage": "https://github.com/jimmywarting/FormData#readme", + "dependencies": { + "fetch-blob": "^3.1.2" + }, + "devDependencies": { + "@types/google-closure-compiler": "^0.0.19", + "@types/node": "^16.7.10", + "google-closure-compiler": "^20210808.0.0" + } +} diff --git a/node_modules/hot-patcher/LICENSE b/node_modules/hot-patcher/LICENSE new file mode 100644 index 00000000..37fef082 --- /dev/null +++ b/node_modules/hot-patcher/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2018 Perry Mitchell + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/node_modules/hot-patcher/README.md b/node_modules/hot-patcher/README.md new file mode 100644 index 00000000..1cc9d70e --- /dev/null +++ b/node_modules/hot-patcher/README.md @@ -0,0 +1,144 @@ +# Hot-Patcher +> Hot method patching framework for handling environmental method differences + +![Build status](https://github.com/perry-mitchell/hot-patcher/actions/workflows/test.yml/badge.svg) [![npm version](https://badge.fury.io/js/hot-patcher.svg)](https://www.npmjs.com/package/hot-patcher) + +## About + +Hot-Patcher provides a simple API to manage patched methods. I found while writing [Buttercup](https://buttercup.pw) that managing overwritten methods between environments (Node/Browser/React-Native) was becoming cumbersome, and having a single _agreed-upon_ method of doing so was the best way to go. + +## Installation + +Install Hot-Patcher from [npm](https://www.npmjs.com/package/hot-patcher): + +```shell +npm install hot-patcher --save +``` + +**NB:** This is an ESM library. + +## Usage + +Hot-Patcher is a class and can simply be instantiated: + +```typescript +import { HotPatcher } from "hot-patcher"; + +const hp = new HotPatcher(); +``` + +Hot-Patcher is designed to be used with patchable tools: + +```typescript +import { HotPatcher } from "hot-patcher"; + +export class MyHelper { + public patcher: HotPatcher; + + constructor() { + this.patcher = new HotPatcher(); + } + + increment(arg: number): number { + return this.patcher.patchInline("increment", someArg => { + return someArg + 1; + }, arg); + } +} +``` + +You can then patch methods when required: + +```typescript +import { MyHelper } from "./MyHelper.js"; + +export function getHelper() { + const helper = new MyHelper(); + helper.patch("increment", (val: number) => val + 2); + return helper; +} +``` + +Patched methods can easily be fetched later: + +```typescript +import { getSharedPatcher } from "./patching.js"; + +const randomString = getSharedPatcher().get("randomString"); +randomString(5); // Generates a random string + +// Or, execute the method directly: +getSharedPatcher().execute("randomString", 5) // Generates a random string +``` + +You can check if a method is patched by using `isPatched`: `patcher.isPatched("some method")`. + +### Inline patching and execution + +Ideally you could wrap function implementation with a patch call, executing it on demand: + +```typescript +function add(a: number, b: number): number { + return patcher.patchInline("add", (a, b) => a + b, a, b); +} + +patcher.isPatched("add"); // false +add(1, 2); // 3 +patcher.isPatched("add"); // true +// calling add() multiple times will call the patched method without "re-patching" it +// over and over again.. +``` + +### Plugins - Chaining/Sequencing functions + +You can use Hot-Patcher to create sequences of functions: + +```typescript +patcher.plugin("increment", x => x * 2, x => x * 2); + +patcher.execute("increment", 2); // 8 +``` + +Which is basically syntactic sugar for a regular `patch()` call: + +```typescript +patcher + .patch("increment", x => x * 2, { chain: true }) + .patch("increment", x => x * 2, { chain: true }); + +patcher.execute("increment", 2); // 8 +``` + +Executing a regular `patch()` without `chain: true` will overwrite all chained methods with the new method. + +Calling `patch()` with `chain: true` when a method already exists will simply add the new method after the existing: + +```typescript +patcher + .patch("increment", x => x * 2, { chain: false }) // or simply without `chain` specified + .patch("increment", x => x * 2, { chain: true }); + +patcher.execute("increment", 2); // still 8 +``` + + +### Restoring methods +Methods can be restored to their _originally patched function_ by calling the `restore` method: + +```typescript +const methodA = () => {}; +const methodB = () => {}; + +patcher + // methodA is now the current (and original) + .patch("someMethod", methodA) + // methodB is now the current + .patch("someMethod", methodB); + +// Restore "someMethod" to methodA (original) +patcher.restore("someMethod"); +``` + +## Use Sparingly + +The intention of Hot-Patcher is not to push every method into a patching instance, but to provide a common API for specific methods which _require_ patching in some specific environments or in situations where users/consumers are expected to provide their own custom implementations. diff --git a/node_modules/hot-patcher/dist/functions.d.ts b/node_modules/hot-patcher/dist/functions.d.ts new file mode 100644 index 00000000..20cf9767 --- /dev/null +++ b/node_modules/hot-patcher/dist/functions.d.ts @@ -0,0 +1,2 @@ +import { PatchFn } from "./types.js"; +export declare function sequence(...methods: Array>): (...args: Array) => T; diff --git a/node_modules/hot-patcher/dist/functions.js b/node_modules/hot-patcher/dist/functions.js new file mode 100644 index 00000000..b913eef2 --- /dev/null +++ b/node_modules/hot-patcher/dist/functions.js @@ -0,0 +1,14 @@ +export function sequence(...methods) { + if (methods.length === 0) { + throw new Error("Failed creating sequence: No functions provided"); + } + return function __executeSequence(...args) { + let result = args; + const _this = this; + while (methods.length > 0) { + const method = methods.shift(); + result = [method.apply(_this, result)]; + } + return result[0]; + }; +} diff --git a/node_modules/hot-patcher/dist/index.d.ts b/node_modules/hot-patcher/dist/index.d.ts new file mode 100644 index 00000000..cc45b3a4 --- /dev/null +++ b/node_modules/hot-patcher/dist/index.d.ts @@ -0,0 +1,2 @@ +export { HotPatcher } from "./patcher.js"; +export * from "./types.js"; diff --git a/node_modules/hot-patcher/dist/index.js b/node_modules/hot-patcher/dist/index.js new file mode 100644 index 00000000..cc45b3a4 --- /dev/null +++ b/node_modules/hot-patcher/dist/index.js @@ -0,0 +1,2 @@ +export { HotPatcher } from "./patcher.js"; +export * from "./types.js"; diff --git a/node_modules/hot-patcher/dist/patcher.d.ts b/node_modules/hot-patcher/dist/patcher.d.ts new file mode 100644 index 00000000..b56604f6 --- /dev/null +++ b/node_modules/hot-patcher/dist/patcher.d.ts @@ -0,0 +1,115 @@ +import { PatchFn, PatchOptions } from "./types.js"; +interface RegisteredItem { + original: PatchFn; + methods: [PatchFn]; + final: boolean; +} +/** + * Hot patching manager class + */ +export declare class HotPatcher { + protected _configuration: { + getEmptyAction: "null" | "throw"; + registry: Record>; + }; + readonly __type__: string; + constructor(); + /** + * Configuration object reference + * @readonly + */ + get configuration(): { + getEmptyAction: "null" | "throw"; + registry: Record>; + }; + /** + * The action to take when a non-set method is requested + * Possible values: null/throw + */ + get getEmptyAction(): "null" | "throw"; + set getEmptyAction(newAction: "null" | "throw"); + /** + * Control another hot-patcher instance + * Force the remote instance to use patched methods from calling instance + * @param target The target instance to control + * @param allowTargetOverrides Allow the target to override patched methods on + * the controller (default is false) + * @returns Returns self + * @throws {Error} Throws if the target is invalid + */ + control(target: HotPatcher, allowTargetOverrides?: boolean): this; + /** + * Execute a patched method + * @param key The method key + * @param args Arguments to pass to the method (optional) + * @see HotPatcher#get + * @returns The output of the called method + */ + execute(key: string, ...args: Array): T; + /** + * Get a method for a key + * @param key The method key + * @returns Returns the requested function or null if the function + * does not exist and the host is configured to return null (and not throw) + * @throws {Error} Throws if the configuration specifies to throw and the method + * does not exist + * @throws {Error} Throws if the `getEmptyAction` value is invalid + */ + get(key: string): Function | null; + /** + * Check if a method has been patched + * @param key The function key + * @returns True if already patched + */ + isPatched(key: string): boolean; + /** + * Patch a method name + * @param key The method key to patch + * @param method The function to set + * @param opts Patch options + * @returns Returns self + */ + patch(key: string, method: PatchFn, opts?: PatchOptions): this; + /** + * Patch a method inline, execute it and return the value + * Used for patching contents of functions. This method will not apply a patched + * function if it has already been patched, allowing for external overrides to + * function. It also means that the function is cached so that it is not + * instantiated every time the outer function is invoked. + * @param key The function key to use + * @param method The function to patch (once, only if not patched) + * @param args Arguments to pass to the function + * @returns The output of the patched function + * @example + * function mySpecialFunction(a, b) { + * return hotPatcher.patchInline("func", (a, b) => { + * return a + b; + * }, a, b); + * } + */ + patchInline(key: string, method: PatchFn, ...args: Array): T; + /** + * Patch a method (or methods) in sequential-mode + * See `patch()` with the option `chain: true` + * @see patch + * @param key The key to patch + * @param methods The methods to patch + * @returns Returns self + */ + plugin(key: string, ...methods: Array>): this; + /** + * Restore a patched method if it has been overridden + * @param key The method key + * @returns Returns self + */ + restore(key: string): this; + /** + * Set a method as being final + * This sets a method as having been finally overridden. Attempts at overriding + * again will fail with an error. + * @param key The key to make final + * @returns Returns self + */ + setFinal(key: string): this; +} +export {}; diff --git a/node_modules/hot-patcher/dist/patcher.js b/node_modules/hot-patcher/dist/patcher.js new file mode 100644 index 00000000..b54fe107 --- /dev/null +++ b/node_modules/hot-patcher/dist/patcher.js @@ -0,0 +1,213 @@ +import { sequence } from "./functions.js"; +const HOT_PATCHER_TYPE = "@@HOTPATCHER"; +const NOOP = () => { }; +function createNewItem(method) { + return { + original: method, + methods: [method], + final: false + }; +} +/** + * Hot patching manager class + */ +export class HotPatcher { + constructor() { + this._configuration = { + registry: {}, + getEmptyAction: "null" + }; + this.__type__ = HOT_PATCHER_TYPE; + } + /** + * Configuration object reference + * @readonly + */ + get configuration() { + return this._configuration; + } + /** + * The action to take when a non-set method is requested + * Possible values: null/throw + */ + get getEmptyAction() { + return this.configuration.getEmptyAction; + } + set getEmptyAction(newAction) { + this.configuration.getEmptyAction = newAction; + } + /** + * Control another hot-patcher instance + * Force the remote instance to use patched methods from calling instance + * @param target The target instance to control + * @param allowTargetOverrides Allow the target to override patched methods on + * the controller (default is false) + * @returns Returns self + * @throws {Error} Throws if the target is invalid + */ + control(target, allowTargetOverrides = false) { + if (!target || target.__type__ !== HOT_PATCHER_TYPE) { + throw new Error("Failed taking control of target HotPatcher instance: Invalid type or object"); + } + Object.keys(target.configuration.registry).forEach(foreignKey => { + if (this.configuration.registry.hasOwnProperty(foreignKey)) { + if (allowTargetOverrides) { + this.configuration.registry[foreignKey] = Object.assign({}, target.configuration.registry[foreignKey]); + } + } + else { + this.configuration.registry[foreignKey] = Object.assign({}, target.configuration.registry[foreignKey]); + } + }); + target._configuration = this.configuration; + return this; + } + /** + * Execute a patched method + * @param key The method key + * @param args Arguments to pass to the method (optional) + * @see HotPatcher#get + * @returns The output of the called method + */ + execute(key, ...args) { + const method = this.get(key) || NOOP; + return method(...args); + } + /** + * Get a method for a key + * @param key The method key + * @returns Returns the requested function or null if the function + * does not exist and the host is configured to return null (and not throw) + * @throws {Error} Throws if the configuration specifies to throw and the method + * does not exist + * @throws {Error} Throws if the `getEmptyAction` value is invalid + */ + get(key) { + const item = this.configuration.registry[key]; + if (!item) { + switch (this.getEmptyAction) { + case "null": + return null; + case "throw": + throw new Error(`Failed handling method request: No method provided for override: ${key}`); + default: + throw new Error(`Failed handling request which resulted in an empty method: Invalid empty-action specified: ${this.getEmptyAction}`); + } + } + return sequence(...item.methods); + } + /** + * Check if a method has been patched + * @param key The function key + * @returns True if already patched + */ + isPatched(key) { + return !!this.configuration.registry[key]; + } + /** + * Patch a method name + * @param key The method key to patch + * @param method The function to set + * @param opts Patch options + * @returns Returns self + */ + patch(key, method, opts = {}) { + const { chain = false } = opts; + if (this.configuration.registry[key] && this.configuration.registry[key].final) { + throw new Error(`Failed patching '${key}': Method marked as being final`); + } + if (typeof method !== "function") { + throw new Error(`Failed patching '${key}': Provided method is not a function`); + } + if (chain) { + // Add new method to the chain + if (!this.configuration.registry[key]) { + // New key, create item + this.configuration.registry[key] = createNewItem(method); + } + else { + // Existing, push the method + this.configuration.registry[key].methods.push(method); + } + } + else { + // Replace the original + if (this.isPatched(key)) { + const { original } = this.configuration.registry[key]; + this.configuration.registry[key] = Object.assign(createNewItem(method), { + original + }); + } + else { + this.configuration.registry[key] = createNewItem(method); + } + } + return this; + } + /** + * Patch a method inline, execute it and return the value + * Used for patching contents of functions. This method will not apply a patched + * function if it has already been patched, allowing for external overrides to + * function. It also means that the function is cached so that it is not + * instantiated every time the outer function is invoked. + * @param key The function key to use + * @param method The function to patch (once, only if not patched) + * @param args Arguments to pass to the function + * @returns The output of the patched function + * @example + * function mySpecialFunction(a, b) { + * return hotPatcher.patchInline("func", (a, b) => { + * return a + b; + * }, a, b); + * } + */ + patchInline(key, method, ...args) { + if (!this.isPatched(key)) { + this.patch(key, method); + } + return this.execute(key, ...args); + } + /** + * Patch a method (or methods) in sequential-mode + * See `patch()` with the option `chain: true` + * @see patch + * @param key The key to patch + * @param methods The methods to patch + * @returns Returns self + */ + plugin(key, ...methods) { + methods.forEach(method => { + this.patch(key, method, { chain: true }); + }); + return this; + } + /** + * Restore a patched method if it has been overridden + * @param key The method key + * @returns Returns self + */ + restore(key) { + if (!this.isPatched(key)) { + throw new Error(`Failed restoring method: No method present for key: ${key}`); + } + else if (typeof this.configuration.registry[key].original !== "function") { + throw new Error(`Failed restoring method: Original method not found or of invalid type for key: ${key}`); + } + this.configuration.registry[key].methods = [this.configuration.registry[key].original]; + return this; + } + /** + * Set a method as being final + * This sets a method as having been finally overridden. Attempts at overriding + * again will fail with an error. + * @param key The key to make final + * @returns Returns self + */ + setFinal(key) { + if (!this.configuration.registry.hasOwnProperty(key)) { + throw new Error(`Failed marking '${key}' as final: No method found for key`); + } + this.configuration.registry[key].final = true; + return this; + } +} diff --git a/node_modules/hot-patcher/dist/types.d.ts b/node_modules/hot-patcher/dist/types.d.ts new file mode 100644 index 00000000..62928389 --- /dev/null +++ b/node_modules/hot-patcher/dist/types.d.ts @@ -0,0 +1,10 @@ +export type PatchFn = (...args: Array) => T; +export interface PatchOptions { + /** + * Whether or not to allow chaining execution. Chained + * execution allows for attaching multiple callbacks to a key, where the callbacks + * will be executed in order of when they were patched (oldest to newest), the + * values being passed from one method to another. + */ + chain?: boolean; +} diff --git a/node_modules/hot-patcher/dist/types.js b/node_modules/hot-patcher/dist/types.js new file mode 100644 index 00000000..cb0ff5c3 --- /dev/null +++ b/node_modules/hot-patcher/dist/types.js @@ -0,0 +1 @@ +export {}; diff --git a/node_modules/hot-patcher/package.json b/node_modules/hot-patcher/package.json new file mode 100644 index 00000000..fac56cee --- /dev/null +++ b/node_modules/hot-patcher/package.json @@ -0,0 +1,60 @@ +{ + "name": "hot-patcher", + "version": "2.0.1", + "description": "Hot method patching framework for handling environmental method differences", + "exports": "./dist/index.js", + "react-native": "./dist/index.js", + "types": "./dist/index.d.ts", + "type": "module", + "scripts": { + "build": "npm run clean && tsc", + "clean": "rimraf dist", + "format": "prettier --write '{source,test}/**/*.js'", + "prepublishOnly": "npm run build", + "test": "run-s test:specs test:format", + "test:format": "prettier --check '{source,test}/**/*.js'", + "test:specs": "npm run build && c8 --check-coverage --100 mocha 'test/**/*.spec.js'" + }, + "files": [ + "dist/*" + ], + "lint-staged": { + "{source,test}/**/*.js": [ + "prettier --write" + ] + }, + "husky": { + "hooks": { + "pre-commit": "lint-staged" + } + }, + "repository": { + "type": "git", + "url": "git+https://github.com/perry-mitchell/hot-patcher.git" + }, + "keywords": [ + "patch", + "override", + "hot", + "patch" + ], + "author": "Perry Mitchell ", + "license": "MIT", + "bugs": { + "url": "https://github.com/perry-mitchell/hot-patcher/issues" + }, + "homepage": "https://github.com/perry-mitchell/hot-patcher#readme", + "devDependencies": { + "@types/node": "^18.11.9", + "c8": "^7.12.0", + "chai": "^4.3.7", + "husky": "^4.3.8", + "lint-staged": "^13.0.3", + "mocha": "^10.1.0", + "npm-run-all": "^4.1.5", + "prettier": "^2.7.1", + "rimraf": "^3.0.2", + "sinon": "^14.0.2", + "typescript": "^4.9.3" + } +} diff --git a/node_modules/is-buffer/LICENSE b/node_modules/is-buffer/LICENSE new file mode 100644 index 00000000..0c068cee --- /dev/null +++ b/node_modules/is-buffer/LICENSE @@ -0,0 +1,21 @@ +The MIT License (MIT) + +Copyright (c) Feross Aboukhadijeh + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. diff --git a/node_modules/is-buffer/README.md b/node_modules/is-buffer/README.md new file mode 100644 index 00000000..cce0a8cf --- /dev/null +++ b/node_modules/is-buffer/README.md @@ -0,0 +1,53 @@ +# is-buffer [![travis][travis-image]][travis-url] [![npm][npm-image]][npm-url] [![downloads][downloads-image]][downloads-url] [![javascript style guide][standard-image]][standard-url] + +[travis-image]: https://img.shields.io/travis/feross/is-buffer/master.svg +[travis-url]: https://travis-ci.org/feross/is-buffer +[npm-image]: https://img.shields.io/npm/v/is-buffer.svg +[npm-url]: https://npmjs.org/package/is-buffer +[downloads-image]: https://img.shields.io/npm/dm/is-buffer.svg +[downloads-url]: https://npmjs.org/package/is-buffer +[standard-image]: https://img.shields.io/badge/code_style-standard-brightgreen.svg +[standard-url]: https://standardjs.com + +#### Determine if an object is a [`Buffer`](http://nodejs.org/api/buffer.html) (including the [browserify Buffer](https://github.com/feross/buffer)) + +[![saucelabs][saucelabs-image]][saucelabs-url] + +[saucelabs-image]: https://saucelabs.com/browser-matrix/is-buffer.svg +[saucelabs-url]: https://saucelabs.com/u/is-buffer + +## Why not use `Buffer.isBuffer`? + +This module lets you check if an object is a `Buffer` without using `Buffer.isBuffer` (which includes the whole [buffer](https://github.com/feross/buffer) module in [browserify](http://browserify.org/)). + +It's future-proof and works in node too! + +## install + +```bash +npm install is-buffer +``` + +## usage + +```js +var isBuffer = require('is-buffer') + +isBuffer(new Buffer(4)) // true + +isBuffer(undefined) // false +isBuffer(null) // false +isBuffer('') // false +isBuffer(true) // false +isBuffer(false) // false +isBuffer(0) // false +isBuffer(1) // false +isBuffer(1.0) // false +isBuffer('string') // false +isBuffer({}) // false +isBuffer(function foo () {}) // false +``` + +## license + +MIT. Copyright (C) [Feross Aboukhadijeh](http://feross.org). diff --git a/node_modules/is-buffer/index.js b/node_modules/is-buffer/index.js new file mode 100644 index 00000000..9cce3965 --- /dev/null +++ b/node_modules/is-buffer/index.js @@ -0,0 +1,21 @@ +/*! + * Determine if an object is a Buffer + * + * @author Feross Aboukhadijeh + * @license MIT + */ + +// The _isBuffer check is for Safari 5-7 support, because it's missing +// Object.prototype.constructor. Remove this eventually +module.exports = function (obj) { + return obj != null && (isBuffer(obj) || isSlowBuffer(obj) || !!obj._isBuffer) +} + +function isBuffer (obj) { + return !!obj.constructor && typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj) +} + +// For Node v0.10 support. Remove this eventually. +function isSlowBuffer (obj) { + return typeof obj.readFloatLE === 'function' && typeof obj.slice === 'function' && isBuffer(obj.slice(0, 0)) +} diff --git a/node_modules/is-buffer/package.json b/node_modules/is-buffer/package.json new file mode 100644 index 00000000..ea12137a --- /dev/null +++ b/node_modules/is-buffer/package.json @@ -0,0 +1,51 @@ +{ + "name": "is-buffer", + "description": "Determine if an object is a Buffer", + "version": "1.1.6", + "author": { + "name": "Feross Aboukhadijeh", + "email": "feross@feross.org", + "url": "http://feross.org/" + }, + "bugs": { + "url": "https://github.com/feross/is-buffer/issues" + }, + "dependencies": {}, + "devDependencies": { + "standard": "*", + "tape": "^4.0.0", + "zuul": "^3.0.0" + }, + "keywords": [ + "buffer", + "buffers", + "type", + "core buffer", + "browser buffer", + "browserify", + "typed array", + "uint32array", + "int16array", + "int32array", + "float32array", + "float64array", + "browser", + "arraybuffer", + "dataview" + ], + "license": "MIT", + "main": "index.js", + "repository": { + "type": "git", + "url": "git://github.com/feross/is-buffer.git" + }, + "scripts": { + "test": "standard && npm run test-node && npm run test-browser", + "test-browser": "zuul -- test/*.js", + "test-browser-local": "zuul --local -- test/*.js", + "test-node": "tape test/*.js" + }, + "testling": { + "files": "test/*.js" + } +} diff --git a/node_modules/is-buffer/test/basic.js b/node_modules/is-buffer/test/basic.js new file mode 100644 index 00000000..be4f8e43 --- /dev/null +++ b/node_modules/is-buffer/test/basic.js @@ -0,0 +1,24 @@ +var isBuffer = require('../') +var test = require('tape') + +test('is-buffer', function (t) { + t.equal(isBuffer(Buffer.alloc(4)), true, 'new Buffer(4)') + t.equal(isBuffer(Buffer.allocUnsafeSlow(100)), true, 'SlowBuffer(100)') + + t.equal(isBuffer(undefined), false, 'undefined') + t.equal(isBuffer(null), false, 'null') + t.equal(isBuffer(''), false, 'empty string') + t.equal(isBuffer(true), false, 'true') + t.equal(isBuffer(false), false, 'false') + t.equal(isBuffer(0), false, '0') + t.equal(isBuffer(1), false, '1') + t.equal(isBuffer(1.0), false, '1.0') + t.equal(isBuffer('string'), false, 'string') + t.equal(isBuffer({}), false, '{}') + t.equal(isBuffer([]), false, '[]') + t.equal(isBuffer(function foo () {}), false, 'function foo () {}') + t.equal(isBuffer({ isBuffer: null }), false, '{ isBuffer: null }') + t.equal(isBuffer({ isBuffer: function () { throw new Error() } }), false, '{ isBuffer: function () { throw new Error() } }') + + t.end() +}) diff --git a/node_modules/layerr/CHANGELOG.md b/node_modules/layerr/CHANGELOG.md new file mode 100644 index 00000000..9f7b6e0d --- /dev/null +++ b/node_modules/layerr/CHANGELOG.md @@ -0,0 +1,40 @@ +# Layerr Changelog + +## v3.0.0 +_2024-04-22_ + + * Removed `Layerr#cause` due to typescript issues + * `setGlobalName` helper + * Strict mode types + +## v2.1.0 +_2024-04-18_ + + * Error assertion via `assertError` + +## v2.0.1 +_2023-07-17_ + + * React-Native entry in `package.json` + +## v2.0.0 +_2023-02-13_ + + * ESM + +## v1.0.0 +_2022-12-12_ + + * **Major release** + * Class-based `Layerr` instance, compiled to function-style during build + +## v0.1.2 +_2020-08-29_ + + * **Bugfix**: + * Arguments not specified in constructor for `Layerr` + +## v0.1.0 +_2020-08-27_ + + * Initial release diff --git a/node_modules/layerr/LICENSE b/node_modules/layerr/LICENSE new file mode 100644 index 00000000..a97024ef --- /dev/null +++ b/node_modules/layerr/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2020 Perry Mitchell + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/node_modules/layerr/README.md b/node_modules/layerr/README.md new file mode 100644 index 00000000..f0fc4759 --- /dev/null +++ b/node_modules/layerr/README.md @@ -0,0 +1,74 @@ +# Layerr + +> Errors, with.. layers.. + +A NodeJS and Web `Error` wrapping utility, based heavily on [VError](https://github.com/joyent/node-verror), but without all the extras and dependencies on Node core utilities. Written in Typescript, compiled to JavaScript and suitable for bundling in the browser. + +Uses no dependencies, minifies well and is a great way to wrap errors as they propagate through complex applications (such as Express services, for instance). + +_Layerr is an ESM library, and as such you need a compatible environment in which to install and use it._ + +## Installation + +Install by running: `npm install layerr`. + +## Usage + +Use it as a regular error: + +```typescript +const { Layerr } = require("layerr"); + +throw new Layerr("Test error"); +``` + +Or use it to wrap errors: + +```typescript +doSomething().catch((err) => { + throw new Layerr(err, "Failed doing something"); +}); +``` + +Layerr's can have info attached: + +```typescript +const { Layerr } = require("layerr"); + +function somethingElse() { + throw new Layerr( + { + info: { + code: 123, + }, + }, + "Problem" + ); +} + +somethingElse().catch((err: Layerr) => { + const { code } = Layerr.info(err); + // code === 123 +}); +``` + +### Global Name + +By default Layerr names all created errors as `Layerr`. You can change this name by calling `setGlobalName`, and revert it by passing `null` to this function: + +```typescript +import { Layerr, setGlobalName } from "layerr"; + +setGlobalName("CustomError"); + +const err = new Layerr("My error"); + +err.name; // "CustomError" + +throw err; +// Uncaught Layerr [CustomError]: My error +``` + +## Support + +Layerr (v3) supports NodeJS 16 onwards. It should also support all major+current browsers, once compiled/bundled. diff --git a/node_modules/layerr/dist/error.d.ts b/node_modules/layerr/dist/error.d.ts new file mode 100644 index 00000000..1876619f --- /dev/null +++ b/node_modules/layerr/dist/error.d.ts @@ -0,0 +1,2 @@ +export declare function assertError(err: unknown): asserts err is Error; +export declare function isError(err: unknown): boolean; diff --git a/node_modules/layerr/dist/error.js b/node_modules/layerr/dist/error.js new file mode 100644 index 00000000..691ec385 --- /dev/null +++ b/node_modules/layerr/dist/error.js @@ -0,0 +1,14 @@ +export function assertError(err) { + if (!isError(err)) { + throw new Error("Parameter was not an error"); + } +} +export function isError(err) { + return ((!!err && + typeof err === "object" && + objectToString(err) === "[object Error]") || + err instanceof Error); +} +function objectToString(obj) { + return Object.prototype.toString.call(obj); +} diff --git a/node_modules/layerr/dist/global.d.ts b/node_modules/layerr/dist/global.d.ts new file mode 100644 index 00000000..f1fd9f4b --- /dev/null +++ b/node_modules/layerr/dist/global.d.ts @@ -0,0 +1,2 @@ +export declare function getGlobalName(): string; +export declare function setGlobalName(name?: string | null): void; diff --git a/node_modules/layerr/dist/global.js b/node_modules/layerr/dist/global.js new file mode 100644 index 00000000..6464b8b8 --- /dev/null +++ b/node_modules/layerr/dist/global.js @@ -0,0 +1,8 @@ +const NAME = "Layerr"; +let __name = NAME; +export function getGlobalName() { + return __name; +} +export function setGlobalName(name = null) { + __name = name ?? NAME; +} diff --git a/node_modules/layerr/dist/index.d.ts b/node_modules/layerr/dist/index.d.ts new file mode 100644 index 00000000..25e3daa8 --- /dev/null +++ b/node_modules/layerr/dist/index.d.ts @@ -0,0 +1,4 @@ +export { Layerr } from "./layerr.js"; +export { assertError, isError } from "./error.js"; +export { getGlobalName, setGlobalName } from "./global.js"; +export * from "./types.js"; diff --git a/node_modules/layerr/dist/index.js b/node_modules/layerr/dist/index.js new file mode 100644 index 00000000..25e3daa8 --- /dev/null +++ b/node_modules/layerr/dist/index.js @@ -0,0 +1,4 @@ +export { Layerr } from "./layerr.js"; +export { assertError, isError } from "./error.js"; +export { getGlobalName, setGlobalName } from "./global.js"; +export * from "./types.js"; diff --git a/node_modules/layerr/dist/layerr.d.ts b/node_modules/layerr/dist/layerr.d.ts new file mode 100644 index 00000000..7f9938e9 --- /dev/null +++ b/node_modules/layerr/dist/layerr.d.ts @@ -0,0 +1,10 @@ +import { LayerrInfo, LayerrOptions } from "./types.js"; +export declare class Layerr extends Error { + _cause?: Error; + _info?: LayerrInfo; + constructor(errorOptionsOrMessage?: LayerrOptions | string | Error, messageText?: string); + static cause(err: Layerr | Error): Layerr | Error | null; + static fullStack(err: Layerr | Error): string; + static info(err: Layerr | Error): LayerrInfo; + toString(): string; +} diff --git a/node_modules/layerr/dist/layerr.js b/node_modules/layerr/dist/layerr.js new file mode 100644 index 00000000..97f3342b --- /dev/null +++ b/node_modules/layerr/dist/layerr.js @@ -0,0 +1,69 @@ +import { assertError, isError } from "./error.js"; +import { getGlobalName } from "./global.js"; +import { parseArguments } from "./tools.js"; +export class Layerr extends Error { + constructor(errorOptionsOrMessage, messageText) { + const args = [...arguments]; + const { options, shortMessage } = parseArguments(args); + let message = shortMessage; + if (options.cause) { + message = `${message}: ${options.cause.message}`; + } + super(message); + this.message = message; + if (options.name && typeof options.name === "string") { + this.name = options.name; + } + else { + this.name = getGlobalName(); + } + if (options.cause) { + Object.defineProperty(this, "_cause", { value: options.cause }); + } + Object.defineProperty(this, "_info", { value: {} }); + if (options.info && typeof options.info === "object") { + Object.assign(this._info, options.info); + } + if (Error.captureStackTrace) { + const ctor = options.constructorOpt || this.constructor; + Error.captureStackTrace(this, ctor); + } + } + static cause(err) { + assertError(err); + if (!err._cause) + return null; + return isError(err._cause) + ? err._cause + : null; + } + static fullStack(err) { + assertError(err); + const cause = Layerr.cause(err); + if (cause) { + return `${err.stack}\ncaused by: ${Layerr.fullStack(cause)}`; + } + return err.stack ?? ""; + } + static info(err) { + assertError(err); + const output = {}; + const cause = Layerr.cause(err); + if (cause) { + Object.assign(output, Layerr.info(cause)); + } + if (err._info) { + Object.assign(output, err._info); + } + return output; + } + toString() { + let output = this.name || + this.constructor.name || + this.constructor.prototype.name; + if (this.message) { + output = `${output}: ${this.message}`; + } + return output; + } +} diff --git a/node_modules/layerr/dist/tools.d.ts b/node_modules/layerr/dist/tools.d.ts new file mode 100644 index 00000000..8ff7eab3 --- /dev/null +++ b/node_modules/layerr/dist/tools.d.ts @@ -0,0 +1,5 @@ +import { LayerrOptions } from "./types.js"; +export declare function parseArguments(args: Array): { + options: LayerrOptions; + shortMessage: string; +}; diff --git a/node_modules/layerr/dist/tools.js b/node_modules/layerr/dist/tools.js new file mode 100644 index 00000000..405019fd --- /dev/null +++ b/node_modules/layerr/dist/tools.js @@ -0,0 +1,28 @@ +import { isError } from "./error.js"; +export function parseArguments(args) { + let options, shortMessage = ""; + if (args.length === 0) { + options = {}; + } + else if (isError(args[0])) { + options = { + cause: args[0], + }; + shortMessage = args.slice(1).join(" ") || ""; + } + else if (args[0] && typeof args[0] === "object") { + options = Object.assign({}, args[0]); + shortMessage = args.slice(1).join(" ") || ""; + } + else if (typeof args[0] === "string") { + options = {}; + shortMessage = shortMessage = args.join(" ") || ""; + } + else { + throw new Error("Invalid arguments passed to Layerr"); + } + return { + options, + shortMessage, + }; +} diff --git a/node_modules/layerr/dist/types.d.ts b/node_modules/layerr/dist/types.d.ts new file mode 100644 index 00000000..abd8a965 --- /dev/null +++ b/node_modules/layerr/dist/types.d.ts @@ -0,0 +1,9 @@ +export interface LayerrInfo { + [key: string]: any; +} +export interface LayerrOptions { + name?: string; + cause?: Error; + info?: Object; + constructorOpt?: Function; +} diff --git a/node_modules/layerr/dist/types.js b/node_modules/layerr/dist/types.js new file mode 100644 index 00000000..cb0ff5c3 --- /dev/null +++ b/node_modules/layerr/dist/types.js @@ -0,0 +1 @@ +export {}; diff --git a/node_modules/layerr/package.json b/node_modules/layerr/package.json new file mode 100644 index 00000000..bb1d1b69 --- /dev/null +++ b/node_modules/layerr/package.json @@ -0,0 +1,57 @@ +{ + "name": "layerr", + "version": "3.0.0", + "description": "Error wrapping utility for NodeJS and the browser", + "exports": "./dist/index.js", + "react-native": "./dist/index.js", + "types": "./dist/index.d.ts", + "type": "module", + "scripts": { + "build": "run-s clean && tsc", + "clean": "rimraf ./dist", + "dev": "npm run clean && tsc --watch", + "prepublishOnly": "npm run build", + "test": "run-s build test:specs", + "test:specs": "nyc mocha 'test/**/*.spec.js'" + }, + "files": [ + "dist/**/*.js", + "dist/**/*.d.ts", + "*.md" + ], + "repository": { + "type": "git", + "url": "git+https://github.com/perry-mitchell/layerr.git" + }, + "keywords": [ + "error", + "verror", + "err", + "nerror", + "exception", + "wrapper", + "extend" + ], + "author": "Perry Mitchell ", + "license": "MIT", + "bugs": { + "url": "https://github.com/perry-mitchell/layerr/issues" + }, + "homepage": "https://github.com/perry-mitchell/layerr#readme", + "devDependencies": { + "@babel/core": "^7.24.4", + "@babel/preset-env": "^7.24.4", + "@babel/preset-typescript": "^7.24.1", + "@types/node": "^20.12.7", + "babel-loader": "^9.1.3", + "chai": "^5.1.0", + "mocha": "^10.4.0", + "npm-run-all": "^4.1.5", + "nyc": "^15.1.0", + "resolve-typescript-plugin": "^2.0.1", + "rimraf": "^5.0.5", + "typescript": "^5.4.5", + "webpack": "^5.91.0", + "webpack-cli": "^5.1.4" + } +} diff --git a/node_modules/md5/.travis.yml b/node_modules/md5/.travis.yml new file mode 100644 index 00000000..1acffbe7 --- /dev/null +++ b/node_modules/md5/.travis.yml @@ -0,0 +1,7 @@ +language: node_js +node_js: + - 0.12 + - 4 + - 5 + - 6 + - 7 diff --git a/node_modules/md5/LICENSE b/node_modules/md5/LICENSE new file mode 100755 index 00000000..f476d11e --- /dev/null +++ b/node_modules/md5/LICENSE @@ -0,0 +1,27 @@ +Copyright © 2011-2012, Paul Vorbach. +Copyright © 2009, Jeff Mott. + +All rights reserved. + +Redistribution and use in source and binary forms, with or without modification, +are permitted provided that the following conditions are met: + +* Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. +* Redistributions in binary form must reproduce the above copyright notice, this + list of conditions and the following disclaimer in the documentation and/or + other materials provided with the distribution. +* Neither the name Crypto-JS nor the names of its contributors may be used to + endorse or promote products derived from this software without specific prior + written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR +ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON +ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/node_modules/md5/README.md b/node_modules/md5/README.md new file mode 100644 index 00000000..5e219088 --- /dev/null +++ b/node_modules/md5/README.md @@ -0,0 +1,111 @@ +# MD5 + +[![build status](https://secure.travis-ci.org/pvorb/node-md5.png)](http://travis-ci.org/pvorb/node-md5) [![info badge](https://img.shields.io/npm/dt/md5.svg)](http://npm-stat.com/charts.html?package=md5) + +a JavaScript function for hashing messages with MD5. + +node-md5 is being sponsored by the following tool; please help to support us by taking a look and signing up to a free trial +GitAds + +## Installation + +You can use this package on the server side as well as the client side. + +### [Node.js](http://nodejs.org/): + +~~~ +npm install md5 +~~~ + + +## API + +~~~ javascript +md5(message) +~~~ + + * `message` -- `String`, `Buffer`, `Array` or `Uint8Array` + * returns `String` + + +## Usage + +~~~ javascript +var md5 = require('md5'); + +console.log(md5('message')); +~~~ + +This will print the following + +~~~ +78e731027d8fd50ed642340b7c9a63b3 +~~~ + +It supports buffers, too + +~~~ javascript +var fs = require('fs'); +var md5 = require('md5'); + +fs.readFile('example.txt', function(err, buf) { + console.log(md5(buf)); +}); +~~~ + +## Versions + +Before version 2.0.0 there were two packages called md5 on npm, one lowercase, +one uppercase (the one you're looking at). As of version 2.0.0, all new versions +of this module will go to lowercase [md5](https://www.npmjs.com/package/md5) on +npm. To use the correct version, users of this module will have to change their +code from `require('MD5')` to `require('md5')` if they want to use versions >= +2.0.0. + + +## Bugs and Issues + +If you encounter any bugs or issues, feel free to open an issue at +[github](https://github.com/pvorb/node-md5/issues). + + +## Credits + +This package is based on the work of Jeff Mott, who did a pure JS implementation +of the MD5 algorithm that was published by Ronald L. Rivest in 1991. I needed a +npm package of the algorithm, so I used Jeff’s implementation for this package. +The original implementation can be found in the +[CryptoJS](http://code.google.com/p/crypto-js/) project. + + +## License + +~~~ +Copyright © 2011-2015, Paul Vorbach. +Copyright © 2009, Jeff Mott. + +All rights reserved. + +Redistribution and use in source and binary forms, with or without modification, +are permitted provided that the following conditions are met: + +* Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. +* Redistributions in binary form must reproduce the above copyright notice, this + list of conditions and the following disclaimer in the documentation and/or + other materials provided with the distribution. +* Neither the name Crypto-JS nor the names of its contributors may be used to + endorse or promote products derived from this software without specific prior + written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR +ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON +ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +~~~ diff --git a/node_modules/md5/demo/index.html b/node_modules/md5/demo/index.html new file mode 100644 index 00000000..2d4b8d20 --- /dev/null +++ b/node_modules/md5/demo/index.html @@ -0,0 +1,48 @@ + + + + + diff --git a/node_modules/md5/dist/md5.min.js b/node_modules/md5/dist/md5.min.js new file mode 100644 index 00000000..250ab735 --- /dev/null +++ b/node_modules/md5/dist/md5.min.js @@ -0,0 +1,7 @@ +var MD5=function(r){function n(o){if(t[o])return t[o].exports;var e=t[o]={i:o,l:!1,exports:{}};return r[o].call(e.exports,e,e.exports,n),e.l=!0,e.exports}var t={};return n.m=r,n.c=t,n.i=function(r){return r},n.d=function(r,t,o){n.o(r,t)||Object.defineProperty(r,t,{configurable:!1,enumerable:!0,get:o})},n.n=function(r){var t=r&&r.__esModule?function(){return r.default}:function(){return r};return n.d(t,"a",t),t},n.o=function(r,n){return Object.prototype.hasOwnProperty.call(r,n)},n.p="",n(n.s=4)}([function(r,n){var t={utf8:{stringToBytes:function(r){return t.bin.stringToBytes(unescape(encodeURIComponent(r)))},bytesToString:function(r){return decodeURIComponent(escape(t.bin.bytesToString(r)))}},bin:{stringToBytes:function(r){for(var n=[],t=0;t>>24)|4278255360&(f[h]<<24|f[h]>>>8);f[s>>>5]|=128<>>9<<4)]=s;for(var p=i._ff,y=i._gg,v=i._hh,d=i._ii,h=0;h>>0,a=a+T>>>0,l=l+x>>>0,g=g+B>>>0}return n.endian([c,a,l,g])};i._ff=function(r,n,t,o,e,u,i){var f=r+(n&t|~n&o)+(e>>>0)+i;return(f<>>32-u)+n},i._gg=function(r,n,t,o,e,u,i){var f=r+(n&o|t&~o)+(e>>>0)+i;return(f<>>32-u)+n},i._hh=function(r,n,t,o,e,u,i){var f=r+(n^t^o)+(e>>>0)+i;return(f<>>32-u)+n},i._ii=function(r,n,t,o,e,u,i){var f=r+(t^(n|~o))+(e>>>0)+i;return(f<>>32-u)+n},i._blocksize=16,i._digestsize=16,r.exports=function(r,t){if(void 0===r||null===r)throw new Error("Illegal argument "+r);var o=n.wordsToBytes(i(r,t));return t&&t.asBytes?o:t&&t.asString?u.bytesToString(o):n.bytesToHex(o)}}()},function(r,n){!function(){var n="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",t={rotl:function(r,n){return r<>>32-n},rotr:function(r,n){return r<<32-n|r>>>n},endian:function(r){if(r.constructor==Number)return 16711935&t.rotl(r,8)|4278255360&t.rotl(r,24);for(var n=0;n0;r--)n.push(Math.floor(256*Math.random()));return n},bytesToWords:function(r){for(var n=[],t=0,o=0;t>>5]|=r[t]<<24-o%32;return n},wordsToBytes:function(r){for(var n=[],t=0;t<32*r.length;t+=8)n.push(r[t>>>5]>>>24-t%32&255);return n},bytesToHex:function(r){for(var n=[],t=0;t>>4).toString(16)),n.push((15&r[t]).toString(16));return n.join("")},hexToBytes:function(r){for(var n=[],t=0;t>>6*(3-u)&63)):t.push("=");return t.join("")},base64ToBytes:function(r){r=r.replace(/[^A-Z0-9+\/]/gi,"");for(var t=[],o=0,e=0;o>>6-2*e);return t}};r.exports=t}()},function(r,n){function t(r){return!!r.constructor&&"function"==typeof r.constructor.isBuffer&&r.constructor.isBuffer(r)}function o(r){return"function"==typeof r.readFloatLE&&"function"==typeof r.slice&&t(r.slice(0,0))}/*! + * Determine if an object is a Buffer + * + * @author Feross Aboukhadijeh + * @license MIT + */ +r.exports=function(r){return null!=r&&(t(r)||o(r)||!!r._isBuffer)}},function(r,n,t){r.exports=t(1)}]); \ No newline at end of file diff --git a/node_modules/md5/md5.js b/node_modules/md5/md5.js new file mode 100644 index 00000000..0f8905a6 --- /dev/null +++ b/node_modules/md5/md5.js @@ -0,0 +1,160 @@ +(function(){ + var crypt = require('crypt'), + utf8 = require('charenc').utf8, + isBuffer = require('is-buffer'), + bin = require('charenc').bin, + + // The core + md5 = function (message, options) { + // Convert to byte array + if (message.constructor == String) + if (options && options.encoding === 'binary') + message = bin.stringToBytes(message); + else + message = utf8.stringToBytes(message); + else if (isBuffer(message)) + message = Array.prototype.slice.call(message, 0); + else if (!Array.isArray(message) && message.constructor !== Uint8Array) + message = message.toString(); + // else, assume byte array already + + var m = crypt.bytesToWords(message), + l = message.length * 8, + a = 1732584193, + b = -271733879, + c = -1732584194, + d = 271733878; + + // Swap endian + for (var i = 0; i < m.length; i++) { + m[i] = ((m[i] << 8) | (m[i] >>> 24)) & 0x00FF00FF | + ((m[i] << 24) | (m[i] >>> 8)) & 0xFF00FF00; + } + + // Padding + m[l >>> 5] |= 0x80 << (l % 32); + m[(((l + 64) >>> 9) << 4) + 14] = l; + + // Method shortcuts + var FF = md5._ff, + GG = md5._gg, + HH = md5._hh, + II = md5._ii; + + for (var i = 0; i < m.length; i += 16) { + + var aa = a, + bb = b, + cc = c, + dd = d; + + a = FF(a, b, c, d, m[i+ 0], 7, -680876936); + d = FF(d, a, b, c, m[i+ 1], 12, -389564586); + c = FF(c, d, a, b, m[i+ 2], 17, 606105819); + b = FF(b, c, d, a, m[i+ 3], 22, -1044525330); + a = FF(a, b, c, d, m[i+ 4], 7, -176418897); + d = FF(d, a, b, c, m[i+ 5], 12, 1200080426); + c = FF(c, d, a, b, m[i+ 6], 17, -1473231341); + b = FF(b, c, d, a, m[i+ 7], 22, -45705983); + a = FF(a, b, c, d, m[i+ 8], 7, 1770035416); + d = FF(d, a, b, c, m[i+ 9], 12, -1958414417); + c = FF(c, d, a, b, m[i+10], 17, -42063); + b = FF(b, c, d, a, m[i+11], 22, -1990404162); + a = FF(a, b, c, d, m[i+12], 7, 1804603682); + d = FF(d, a, b, c, m[i+13], 12, -40341101); + c = FF(c, d, a, b, m[i+14], 17, -1502002290); + b = FF(b, c, d, a, m[i+15], 22, 1236535329); + + a = GG(a, b, c, d, m[i+ 1], 5, -165796510); + d = GG(d, a, b, c, m[i+ 6], 9, -1069501632); + c = GG(c, d, a, b, m[i+11], 14, 643717713); + b = GG(b, c, d, a, m[i+ 0], 20, -373897302); + a = GG(a, b, c, d, m[i+ 5], 5, -701558691); + d = GG(d, a, b, c, m[i+10], 9, 38016083); + c = GG(c, d, a, b, m[i+15], 14, -660478335); + b = GG(b, c, d, a, m[i+ 4], 20, -405537848); + a = GG(a, b, c, d, m[i+ 9], 5, 568446438); + d = GG(d, a, b, c, m[i+14], 9, -1019803690); + c = GG(c, d, a, b, m[i+ 3], 14, -187363961); + b = GG(b, c, d, a, m[i+ 8], 20, 1163531501); + a = GG(a, b, c, d, m[i+13], 5, -1444681467); + d = GG(d, a, b, c, m[i+ 2], 9, -51403784); + c = GG(c, d, a, b, m[i+ 7], 14, 1735328473); + b = GG(b, c, d, a, m[i+12], 20, -1926607734); + + a = HH(a, b, c, d, m[i+ 5], 4, -378558); + d = HH(d, a, b, c, m[i+ 8], 11, -2022574463); + c = HH(c, d, a, b, m[i+11], 16, 1839030562); + b = HH(b, c, d, a, m[i+14], 23, -35309556); + a = HH(a, b, c, d, m[i+ 1], 4, -1530992060); + d = HH(d, a, b, c, m[i+ 4], 11, 1272893353); + c = HH(c, d, a, b, m[i+ 7], 16, -155497632); + b = HH(b, c, d, a, m[i+10], 23, -1094730640); + a = HH(a, b, c, d, m[i+13], 4, 681279174); + d = HH(d, a, b, c, m[i+ 0], 11, -358537222); + c = HH(c, d, a, b, m[i+ 3], 16, -722521979); + b = HH(b, c, d, a, m[i+ 6], 23, 76029189); + a = HH(a, b, c, d, m[i+ 9], 4, -640364487); + d = HH(d, a, b, c, m[i+12], 11, -421815835); + c = HH(c, d, a, b, m[i+15], 16, 530742520); + b = HH(b, c, d, a, m[i+ 2], 23, -995338651); + + a = II(a, b, c, d, m[i+ 0], 6, -198630844); + d = II(d, a, b, c, m[i+ 7], 10, 1126891415); + c = II(c, d, a, b, m[i+14], 15, -1416354905); + b = II(b, c, d, a, m[i+ 5], 21, -57434055); + a = II(a, b, c, d, m[i+12], 6, 1700485571); + d = II(d, a, b, c, m[i+ 3], 10, -1894986606); + c = II(c, d, a, b, m[i+10], 15, -1051523); + b = II(b, c, d, a, m[i+ 1], 21, -2054922799); + a = II(a, b, c, d, m[i+ 8], 6, 1873313359); + d = II(d, a, b, c, m[i+15], 10, -30611744); + c = II(c, d, a, b, m[i+ 6], 15, -1560198380); + b = II(b, c, d, a, m[i+13], 21, 1309151649); + a = II(a, b, c, d, m[i+ 4], 6, -145523070); + d = II(d, a, b, c, m[i+11], 10, -1120210379); + c = II(c, d, a, b, m[i+ 2], 15, 718787259); + b = II(b, c, d, a, m[i+ 9], 21, -343485551); + + a = (a + aa) >>> 0; + b = (b + bb) >>> 0; + c = (c + cc) >>> 0; + d = (d + dd) >>> 0; + } + + return crypt.endian([a, b, c, d]); + }; + + // Auxiliary functions + md5._ff = function (a, b, c, d, x, s, t) { + var n = a + (b & c | ~b & d) + (x >>> 0) + t; + return ((n << s) | (n >>> (32 - s))) + b; + }; + md5._gg = function (a, b, c, d, x, s, t) { + var n = a + (b & d | c & ~d) + (x >>> 0) + t; + return ((n << s) | (n >>> (32 - s))) + b; + }; + md5._hh = function (a, b, c, d, x, s, t) { + var n = a + (b ^ c ^ d) + (x >>> 0) + t; + return ((n << s) | (n >>> (32 - s))) + b; + }; + md5._ii = function (a, b, c, d, x, s, t) { + var n = a + (c ^ (b | ~d)) + (x >>> 0) + t; + return ((n << s) | (n >>> (32 - s))) + b; + }; + + // Package private blocksize + md5._blocksize = 16; + md5._digestsize = 16; + + module.exports = function (message, options) { + if (message === undefined || message === null) + throw new Error('Illegal argument ' + message); + + var digestbytes = crypt.wordsToBytes(md5(message, options)); + return options && options.asBytes ? digestbytes : + options && options.asString ? bin.bytesToString(digestbytes) : + crypt.bytesToHex(digestbytes); + }; + +})(); diff --git a/node_modules/md5/package.json b/node_modules/md5/package.json new file mode 100644 index 00000000..7618a073 --- /dev/null +++ b/node_modules/md5/package.json @@ -0,0 +1,38 @@ +{ + "name": "md5", + "description": "js function for hashing messages with MD5", + "version": "2.3.0", + "author": "Paul Vorbach (http://paul.vorba.ch)", + "contributors": [ + "salba" + ], + "tags": [ + "md5", + "hash", + "encryption", + "message digest" + ], + "repository": { + "type": "git", + "url": "git://github.com/pvorb/node-md5.git" + }, + "bugs": { + "url": "https://github.com/pvorb/node-md5/issues" + }, + "main": "md5.js", + "scripts": { + "test": "mocha", + "webpack": "webpack -p" + }, + "dependencies": { + "charenc": "0.0.2", + "crypt": "0.0.2", + "is-buffer": "~1.1.6" + }, + "devDependencies": { + "mocha": "~2.3.4", + "webpack": "~2.4.1" + }, + "optionalDependencies": {}, + "license": "BSD-3-Clause" +} diff --git a/node_modules/md5/test.js b/node_modules/md5/test.js new file mode 100644 index 00000000..db78c254 --- /dev/null +++ b/node_modules/md5/test.js @@ -0,0 +1,75 @@ +var md5 = require('./md5.js'); +var assert = require('assert'); + +describe('md5', function () { + + it('should throw an error for an undefined value', function() { + assert.throws(function() { + md5(undefined); + }); + }); + + it('should allow the hashing of the string `undefined`', function() { + assert.equal('5e543256c480ac577d30f76f9120eb74', md5('undefined')); + }); + + it('should throw an error for `null`', function() { + assert.throws(function() { + md5(null); + }); + }); + + it('should return the expected MD5 hash for "message"', function() { + assert.equal('78e731027d8fd50ed642340b7c9a63b3', md5('message')); + }); + + it('should not return the same hash for random numbers twice', function() { + var msg1 = Math.floor((Math.random() * 100000) + 1) + (new Date).getTime(); + var msg2 = Math.floor((Math.random() * 100000) + 1) + (new Date).getTime(); + + if (msg1 !== msg2) { + assert.notEqual(md5(msg1), md5(msg2)); + } else { + assert.equal(md5(msg1), md5(msg1)); + } + }); + + it('should support Node.js Buffers', function() { + var buffer = new Buffer('message áßäöü', 'utf8'); + + assert.equal(md5(buffer), md5('message áßäöü')); + }) + + it('should be able to use a binary encoded string', function() { + var hash1 = md5('abc', { asString: true }); + var hash2 = md5(hash1 + 'a', { asString: true, encoding : 'binary' }); + var hash3 = md5(hash1 + 'a', { encoding : 'binary' }); + assert.equal(hash3, '131f0ac52813044f5110e4aec638c169'); + }); + + it('should support Uint8Array', function() { + // Polyfills + if (!Array.from) { + Array.from = function(src, fn) { + var result = new Array(src.length); + for (var i = 0; i < src.length; ++i) + result[i] = fn(src[i]); + return result; + }; + } + if (!Uint8Array.from) { + Uint8Array.from = function(src) { + var result = new Uint8Array(src.length); + for (var i = 0; i < src.length; ++i) + result[i] = src[i]; + return result; + }; + } + + var message = 'foobarbaz'; + var u8arr = Uint8Array.from( + Array.from(message, function(c) { return c.charCodeAt(0); })); + var u8aHash = md5(u8arr); + assert.equal(u8aHash, md5(message)); + }); +}); diff --git a/node_modules/md5/webpack.config.js b/node_modules/md5/webpack.config.js new file mode 100644 index 00000000..310eb375 --- /dev/null +++ b/node_modules/md5/webpack.config.js @@ -0,0 +1,13 @@ +const {resolve} = require('path'); + +module.exports = { + entry: [ + './md5.js' + ], + output: { + path: resolve('./dist'), + filename: 'md5.min.js', + libraryTarget: "var", + library: "MD5" + } +}; \ No newline at end of file diff --git a/node_modules/nested-property/CHANGELOG b/node_modules/nested-property/CHANGELOG new file mode 100644 index 00000000..972ac1e7 --- /dev/null +++ b/node_modules/nested-property/CHANGELOG @@ -0,0 +1,83 @@ +# CHANGELOG + + +### 4.0.0 - 30 SEP 2020 + +* Add type definitions for typescript projects. Note that this is the loosest definition possible to allow +typescript projects to compile without errors. Also embeds some useful documentation + +### 3.0.0 - 27 SEP 2020 + +* Prevent mutation of Object.prototype to address a security issue. (Full report coming soon) + +### 2.0.2 - 22 AUG 2020 + +* Upgrade dependencies to fix vulnerabilites reported by dependa bot + +### 2.0.0 - 18 FEB 2020 + +* Official 2.0.0 release, removing the `-beta1` version +* Extract CHANGELOG into a separate file as per #13 + +### 2.0.0-beta1 - 02 FEB 2020 + +* Add array wildcard `+` to access all properties nested within an array. For example: + +```js +// sets all `name` property in the array to "" +nestedProperty.set(array, "+.name", ""); +``` + +Closes [Issue #8](https://github.com/cosmosio/nested-property/issues/8). Thanks [vemuez](https://github.com/vemuez) for the suggestion! + +### 2.0.1 - 23 JUNE 2020 + +* Upgrading dev dependencies to fix npm audit issues + +### 2.0.0 - 18 FEB 2020 + +* Add support for array wildcards +* Add support for older browsers using babel + +### 1.0.4 - 18 JAN 2020 + +* Fix license field in package.json. Thanks [zr87](https://github.com/zr87) for raising the issue! + +### 1.0.3 - 15 JAN 2020 + +* replaced usage of `const` with `var` to maintain support of pre-ES6 JS interpreters. Thanks [stefanorie](https://github.com/stefanorie) for the contribution! + +### 1.0.2 - 20 NOV 2019 + +* Update package-lock and remove yarn.lock to remove security alerts on dependencies + +### 1.0.1 - 22 JUNE 2019 + +* Update to mocha 6.4.1 to remove security alerts on dependencies + +### 1.0.0 - 22 JUNE 2019 + +* Breaking Change: When calling `set()` with an integer in the path and `nested-property` creates an object at the location, the object is now an array instead of an object. Hopefully, no user of the `nested-property` package should have been expecting to see an object instead of an array, but this constitutes a breaking changes, hence the major update in the semver. + +Thanks [igor-barbosa](https://github.com/igor-barbosa) for the suggestion: [PR #2](https://github.com/cosmosio/nested-property/pull/2) + +### 0.0.7 - 09 AUG 2016 + +* [Remove unused require('assert')](https://github.com/cosmosio/nested-property/pull/1), thanks to [Nilz11](https://github.com/Nilz11) + +### 0.0.6 - 01 MAR 2015 + +* Fix a bug where an invalid path to search an object into is invalid and the isInNestedProperty would throw an error instead of return false + +### 0.0.5 - 19 JAN 2015 + +* Add isIn, to tell if an object is on the path to a nested property. + +### 0.0.4 - 15 JAN 2015 + +* Add {own: true} option to .has to ensure that a nested property isn't coming from the prototype chain +* Add hasOwn, that calls .has with the {own: true} option + +### 0.0.3 - 14 JAN 2015 + +* Add has with tests and documentation \ No newline at end of file diff --git a/node_modules/nested-property/LICENSE b/node_modules/nested-property/LICENSE new file mode 100644 index 00000000..afbd9dbd --- /dev/null +++ b/node_modules/nested-property/LICENSE @@ -0,0 +1,21 @@ +/** +* @license nested-property https://github.com/cosmosio/nested-property +* +* The MIT License (MIT) +* +* Copyright (c) 2014-2020 Olivier Scherrer + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated + * documentation files (the "Software"), to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all copies or substantial + * portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED + * TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF + * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ diff --git a/node_modules/nested-property/README.md b/node_modules/nested-property/README.md new file mode 100644 index 00000000..6736102d --- /dev/null +++ b/node_modules/nested-property/README.md @@ -0,0 +1,249 @@ +![npm](https://img.shields.io/npm/dw/nested-property) +![Actively Maintained](https://img.shields.io/badge/Maintenance%20Level-Actively%20Maintained-green.svg) + +# Nested property + +Traverse a deeply nested JS data structure to get, set values, or test if values are part of the data structure. +Nested property offers a simple syntax to define a path to access a value with. + +For instance: + +```js +const data = { + a: { + b: [ + 10, + 20 + ] + } + }; + +nestedProperty.get(data, "a.b.1"); // returns 20, or sdata.a.b[1] +``` + +The syntax also supports array wildcards to access all items within an array: + +```js +const array = [ + { ssn: "123-456-7890", name: "alice" }, + { ssn: "234-567-8901", name: "bob" }, + { ssn: "456-789-0123", name: "charlie" } +] + +nestedProperty.set(array, "+.ssn", ""); // sets all `ssn` values to +``` + + +## Install + +```bash +npm install nested-property +``` + +## Use + +Require nested-property: + +```bash +var nestedProperty = require("nested-property"); +``` + +### nestedProperty.get(data, "path") + +__You can get a nested property from an object:__ + +```js +var object = { + a: { + b: { + c: { + d: 5 + } + } + } +}; + +nestedProperty.get(object, "a"); // returns object.a +nestedProperty.get(object, "a.b.c"); // returns object.a.b.c +nestedProperty.get(object, "a.b.c.d"); // returns 5 +nestedProperty.get(object, "a.d.c"); // returns undefined +nestedProperty.get(object); // returns object +nestedProperty.get(null); // returns null +``` + +It also works through arrays: + +```js +var array = [{ + a: { + b: [0, 1] + } + }]; + +nestedProperty.get(array, "0"); // returns array[0] +nestedProperty.get(array, "0.a.b"); // returns array[0].a.b +nestedProperty.get(array, "0.a.b.0"); // returns 0 +nestedProperty.get(array, "1.a.b.c"); // returns undefined +``` + +You may also use wildcards to access multiple values: + +```js +var array = [ + { a: 0, b: 1, c: 2 }, + { a: 10, b: 11, c: 12 }, + { a: 20, b: 21, c: 22 } +] + +nestedProperty.get(array, "+.b"); // returns [1, 11, 21] +``` + +### nestedProperty.set(data, "path", value) + +__You can set a nested property on an object:__ + +```js +var object = { + a: { + b: { + c: { + d: 5 + } + } + } +}; + +nestedProperty.set(object, "a", 1); // object.a == 1 +nestedProperty.set(object, "a.b.c", 1337); // object.a.b.c == 1337 +nestedProperty.set(object, "e.f.g", 1); // object.e.f.g == 1, it creates the missing objects! +nestedProperty.set(object); // returns object +nestedProperty.set(null); // returns null +``` + +You can also set a nested property through arrays: + +```js +var array = [ + { + a: [0, 1] + } +]; + +nestedProperty.set(array, "0.a.0", 10); // array[0].a[0] == 10 +nestedProperty.set(array, "0.b.c", 1337); // array[0].b.c == 1337 +``` + + +You may also use wildcards to set multiple values: + +```js +var array = [ + { a: 0, b: 1, c: 2 }, + { a: 10, b: 11, c: 12 }, + { a: 20, b: 21, c: 22 } +] + +nestedProperty.set(array, "+.b", 0); // array[0].b === 0, array[1].b === 0, array[2].b === 0 +``` + +### nestedProperty.has(data, "path") + +__You can also test if a data structure has a nested property:__ + +```js +var array = [ + { + a: [0, 1] + } +]; + +nestedProperty.has(array, "0.a"); // true +nestedProperty.has(array, "0.a.1"); // true +nestedProperty.has(array, "0.a.2"); // false +nestedProperty.has(array, "1.a.0"); // false +``` + +The example shows that it works through array, but of course, plain objects are fine too. + +If it must be an "own" property (i.e. not in the prototype chain) you can use the own option: + +```js +function DataStructure() {} +DataStructure.prototype.prop = true; + +var obj = new DataStructure(); + +nestedProperty.has(obj, "prop", { own: true }); // false +nestedProperty.has(obj, "prop"); // true +``` + +Alternatively, you can use the hasOwn function: + +```js +var obj = Object.create({ prop: true }); + +nestedProperty.hasOwn(obj, "prop"); // false +``` + +Just like other methods, you may also use array wildcards. For instance, testing if any item in an array has a given property: + +```js +var array = [ + { a: 0, b: 1, c: 2 }, + { a: 10, b: 11, c: 12, d: 13 }, + { a: 20, b: 21, c: 22 } +] + +nestedProperty.has(array, "+.d"); // returns true, since array[1].d exists +``` + +### nestedProperty.isIn(data, "path", value) + +__And finally, you can test if an object is on the path to a nested property:__ + +```js +var obj = { + nested: [ + { + property: true + } + ] +}; + +nestedProperty.isIn(obj, "nested.0.property", obj); // true +nestedProperty.isIn(obj, "nested.0.property", obj.nested); // true +nestedProperty.isIn(obj, "nested.0.property", obj.nested[0]); // true + +nestedProperty.isIn(obj, "nested.0.property", {}); // false +``` + +The path doesn't have to be completely valid to return true, as long as the value exists within the valid portion. + +```js +nestedProperty.isIn(obj, "nested.0.property.foo.bar.path", obj.nested[0]); // true +``` + +Unless the `validPath` option is set to `true`, in this case the full path needs to be valid: + +```js +nestedProperty.isIn(obj, "nested.0.property.foo.bar.path", obj.nested[0], { validPath: true }); // false +``` + +Note that if instead of an object you give it the value of the nested property, it'll return true: + +```js +nestedProperty.isIn(obj, "nested.0.property", obj.nested[0].property); // true +nestedProperty.isIn(obj, "nested.0.property", true); // true +``` + +### nestedProperty.ObjectPrototypeMutationError + +__Note that it's not permitted to mutate Object.prototype:__ + +``` +nestedProperty.set({}, '__protot__.a', 1); // throws nestedProperty.ObjectPrototypeMutationError +``` + +# LICENSE + +MIT diff --git a/node_modules/nested-property/dist/nested-property.js b/node_modules/nested-property/dist/nested-property.js new file mode 100644 index 00000000..b49b1772 --- /dev/null +++ b/node_modules/nested-property/dist/nested-property.js @@ -0,0 +1,285 @@ +/** +* @license nested-property https://github.com/cosmosio/nested-property +* +* The MIT License (MIT) +* +* Copyright (c) 2014-2020 Olivier Scherrer +*/ +"use strict"; + +function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); } + +function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } + +function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); } + +function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; } + +function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); } + +function _wrapNativeSuper(Class) { var _cache = typeof Map === "function" ? new Map() : undefined; _wrapNativeSuper = function _wrapNativeSuper(Class) { if (Class === null || !_isNativeFunction(Class)) return Class; if (typeof Class !== "function") { throw new TypeError("Super expression must either be null or a function"); } if (typeof _cache !== "undefined") { if (_cache.has(Class)) return _cache.get(Class); _cache.set(Class, Wrapper); } function Wrapper() { return _construct(Class, arguments, _getPrototypeOf(this).constructor); } Wrapper.prototype = Object.create(Class.prototype, { constructor: { value: Wrapper, enumerable: false, writable: true, configurable: true } }); return _setPrototypeOf(Wrapper, Class); }; return _wrapNativeSuper(Class); } + +function _construct(Parent, args, Class) { if (_isNativeReflectConstruct()) { _construct = Reflect.construct; } else { _construct = function _construct(Parent, args, Class) { var a = [null]; a.push.apply(a, args); var Constructor = Function.bind.apply(Parent, a); var instance = new Constructor(); if (Class) _setPrototypeOf(instance, Class.prototype); return instance; }; } return _construct.apply(null, arguments); } + +function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } } + +function _isNativeFunction(fn) { return Function.toString.call(fn).indexOf("[native code]") !== -1; } + +function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); } + +function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); } + +var ARRAY_WILDCARD = "+"; +var PATH_DELIMITER = "."; + +var ObjectPrototypeMutationError = /*#__PURE__*/function (_Error) { + _inherits(ObjectPrototypeMutationError, _Error); + + function ObjectPrototypeMutationError(params) { + var _this; + + _classCallCheck(this, ObjectPrototypeMutationError); + + _this = _possibleConstructorReturn(this, _getPrototypeOf(ObjectPrototypeMutationError).call(this, params)); + _this.name = "ObjectPrototypeMutationError"; + return _this; + } + + return ObjectPrototypeMutationError; +}(_wrapNativeSuper(Error)); + +module.exports = { + set: setNestedProperty, + get: getNestedProperty, + has: hasNestedProperty, + hasOwn: function hasOwn(object, property, options) { + return this.has(object, property, options || { + own: true + }); + }, + isIn: isInNestedProperty, + ObjectPrototypeMutationError: ObjectPrototypeMutationError +}; +/** + * Get the property of an object nested in one or more objects or array + * Given an object such as a.b.c.d = 5, getNestedProperty(a, "b.c.d") will return 5. + * It also works through arrays. Given a nested array such as a[0].b = 5, getNestedProperty(a, "0.b") will return 5. + * For accessing nested properties through all items in an array, you may use the array wildcard "+". + * For instance, getNestedProperty([{a:1}, {a:2}, {a:3}], "+.a") will return [1, 2, 3] + * @param {Object} object the object to get the property from + * @param {String} property the path to the property as a string + * @returns the object or the the property value if found + */ + +function getNestedProperty(object, property) { + if (_typeof(object) != "object" || object === null) { + return object; + } + + if (typeof property == "undefined") { + return object; + } + + if (typeof property == "number") { + return object[property]; + } + + try { + return traverse(object, property, function _getNestedProperty(currentObject, currentProperty) { + return currentObject[currentProperty]; + }); + } catch (err) { + return object; + } +} +/** + * Tell if a nested object has a given property (or array a given index) + * given an object such as a.b.c.d = 5, hasNestedProperty(a, "b.c.d") will return true. + * It also returns true if the property is in the prototype chain. + * @param {Object} object the object to get the property from + * @param {String} property the path to the property as a string + * @param {Object} options: + * - own: set to reject properties from the prototype + * @returns true if has (property in object), false otherwise + */ + + +function hasNestedProperty(object, property) { + var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {}; + + if (_typeof(object) != "object" || object === null) { + return false; + } + + if (typeof property == "undefined") { + return false; + } + + if (typeof property == "number") { + return property in object; + } + + try { + var has = false; + traverse(object, property, function _hasNestedProperty(currentObject, currentProperty, segments, index) { + if (isLastSegment(segments, index)) { + if (options.own) { + has = currentObject.hasOwnProperty(currentProperty); + } else { + has = currentProperty in currentObject; + } + } else { + return currentObject && currentObject[currentProperty]; + } + }); + return has; + } catch (err) { + return false; + } +} +/** + * Set the property of an object nested in one or more objects + * If the property doesn't exist, it gets created. + * @param {Object} object + * @param {String} property + * @param value the value to set + * @returns object if no assignment was made or the value if the assignment was made + */ + + +function setNestedProperty(object, property, value) { + if (_typeof(object) != "object" || object === null) { + return object; + } + + if (typeof property == "undefined") { + return object; + } + + if (typeof property == "number") { + object[property] = value; + return object[property]; + } + + try { + return traverse(object, property, function _setNestedProperty(currentObject, currentProperty, segments, index) { + if (currentObject === Reflect.getPrototypeOf({})) { + throw new ObjectPrototypeMutationError("Attempting to mutate Object.prototype"); + } + + if (!currentObject[currentProperty]) { + var nextPropIsNumber = Number.isInteger(Number(segments[index + 1])); + var nextPropIsArrayWildcard = segments[index + 1] === ARRAY_WILDCARD; + + if (nextPropIsNumber || nextPropIsArrayWildcard) { + currentObject[currentProperty] = []; + } else { + currentObject[currentProperty] = {}; + } + } + + if (isLastSegment(segments, index)) { + currentObject[currentProperty] = value; + } + + return currentObject[currentProperty]; + }); + } catch (err) { + if (err instanceof ObjectPrototypeMutationError) { + // rethrow + throw err; + } else { + return object; + } + } +} +/** + * Tell if an object is on the path to a nested property + * If the object is on the path, and the path exists, it returns true, and false otherwise. + * @param {Object} object to get the nested property from + * @param {String} property name of the nested property + * @param {Object} objectInPath the object to check + * @param {Object} options: + * - validPath: return false if the path is invalid, even if the object is in the path + * @returns {boolean} true if the object is on the path + */ + + +function isInNestedProperty(object, property, objectInPath) { + var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {}; + + if (_typeof(object) != "object" || object === null) { + return false; + } + + if (typeof property == "undefined") { + return false; + } + + try { + var isIn = false, + pathExists = false; + traverse(object, property, function _isInNestedProperty(currentObject, currentProperty, segments, index) { + isIn = isIn || currentObject === objectInPath || !!currentObject && currentObject[currentProperty] === objectInPath; + pathExists = isLastSegment(segments, index) && _typeof(currentObject) === "object" && currentProperty in currentObject; + return currentObject && currentObject[currentProperty]; + }); + + if (options.validPath) { + return isIn && pathExists; + } else { + return isIn; + } + } catch (err) { + return false; + } +} + +function traverse(object, path) { + var callback = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : function () {}; + var segments = path.split(PATH_DELIMITER); + var length = segments.length; + + var _loop = function _loop(idx) { + var currentSegment = segments[idx]; + + if (!object) { + return { + v: void 0 + }; + } + + if (currentSegment === ARRAY_WILDCARD) { + if (Array.isArray(object)) { + return { + v: object.map(function (value, index) { + var remainingSegments = segments.slice(idx + 1); + + if (remainingSegments.length > 0) { + return traverse(value, remainingSegments.join(PATH_DELIMITER), callback); + } else { + return callback(object, index, segments, idx); + } + }) + }; + } else { + var pathToHere = segments.slice(0, idx).join(PATH_DELIMITER); + throw new Error("Object at wildcard (".concat(pathToHere, ") is not an array")); + } + } else { + object = callback(object, currentSegment, segments, idx); + } + }; + + for (var idx = 0; idx < length; idx++) { + var _ret = _loop(idx); + + if (_typeof(_ret) === "object") return _ret.v; + } + + return object; +} + +function isLastSegment(segments, index) { + return segments.length === index + 1; +} diff --git a/node_modules/nested-property/index.d.ts b/node_modules/nested-property/index.d.ts new file mode 100644 index 00000000..93d94ff4 --- /dev/null +++ b/node_modules/nested-property/index.d.ts @@ -0,0 +1,33 @@ +declare const nestedProperty: { + get( + object: any, + property: string + ): any; + + has( + object: any, + property: string, + options?: { + own: boolean + } + ): boolean; + + set( + object: any, + property: string, + value: any + ): any; + + isInNestedProperty( + object: any, + property: string, + objectInPath: any, + options?: { + validPath: boolean + } + ): boolean; + + ObjectPrototypeMutationError: ErrorConstructor +} + +export = nestedProperty; \ No newline at end of file diff --git a/node_modules/nested-property/package.json b/node_modules/nested-property/package.json new file mode 100644 index 00000000..df82a7e0 --- /dev/null +++ b/node_modules/nested-property/package.json @@ -0,0 +1,55 @@ +{ + "name": "nested-property", + "description": "Read, write or test a data structure's nested property via a string like 'my.nested.property'. It works through arrays and objects.'", + "version": "4.0.0", + "homepage": "https://github.com/cosmosio/nested-property", + "license": "MIT", + "files": [ + "LICENSE", + "CHANGELOG", + "dist/nested-property.js", + "index.d.ts" + ], + "author": "Olivier Scherrer ", + "contributors": [ + { + "name": "Igor Barbosa", + "url": "https://github.com/igor-barbosa" + } + ], + "keywords": [ + "nested", + "property", + "object", + "array", + "read", + "write", + "get", + "set" + ], + "repository": { + "type": "git", + "url": "git@github.com:cosmosio/nested-property.git" + }, + "bugs": { + "url": "https://github.com/cosmosio/nested-property/issues" + }, + "scripts": { + "test": "mocha test/", + "debug-test": "mocha debug test/", + "test-build": "ENTRYPOINT=../dist/nested-property.js mocha test/", + "lint": "eslint index.js test/", + "fix-lint": "eslint index.js test/ --fix", + "build": "babel index.js -o dist/nested-property.js" + }, + "main": "./dist/nested-property.js", + "devDependencies": { + "@babel/cli": "^7.11.6", + "@babel/core": "^7.11.6", + "@babel/preset-env": "^7.11.5", + "chai": "~1.9.1", + "eslint": "^6.8.0", + "mocha": "^8.1.3", + "sinon": "~1.12.2" + } +} diff --git a/node_modules/node-domexception/.history/README_20210527203617.md b/node_modules/node-domexception/.history/README_20210527203617.md new file mode 100644 index 00000000..38d8f856 --- /dev/null +++ b/node_modules/node-domexception/.history/README_20210527203617.md @@ -0,0 +1,2 @@ +# node-domexception +An implementation of the DOMException class from NodeJS diff --git a/node_modules/node-domexception/.history/README_20210527212714.md b/node_modules/node-domexception/.history/README_20210527212714.md new file mode 100644 index 00000000..eed1d13b --- /dev/null +++ b/node_modules/node-domexception/.history/README_20210527212714.md @@ -0,0 +1,41 @@ +# DOMException +An implementation of the DOMException class from NodeJS + +This package implements the [`DOMException`](https://developer.mozilla.org/en-US/docs/Web/API/DOMException) class, from NodeJS itself. +NodeJS has DOMException built in, but it's not globally available, and you can't require/import it from somewhere. + +The only possible way is to use some web-ish tools that have been introduced into NodeJS that throws an error and catch the constructor. +This way you will have the same class that NodeJS has and you can check if the error is a instance of DOMException. +The instanceof check would not have worked with a custom class such as the DOMexception provided by domenic which also is much larger in size. + +```js +import DOMException from 'node-domexception' + +hello().catch(err => { + if (err instanceof DOMException) { + ... + } +}) + +const e1 = new DOMException("Something went wrong", "BadThingsError"); +console.assert(e1.name === "BadThingsError"); +console.assert(e1.code === 0); + +const e2 = new DOMException("Another exciting error message", "NoModificationAllowedError"); +console.assert(e2.name === "NoModificationAllowedError"); +console.assert(e2.code === 7); + +console.assert(DOMException.INUSE_ATTRIBUTE_ERR === 10); +``` + +## APIs + +This package exposes two flavors of the `DOMException` interface depending on the imported module. + +### `domexception` module + +This module default-exports the `DOMException` interface constructor. + +### `domexception/webidl2js-wrapper` module + +This module exports the `DOMException` [interface wrapper API](https://github.com/jsdom/webidl2js#for-interfaces) generated by [webidl2js](https://github.com/jsdom/webidl2js). diff --git a/node_modules/node-domexception/.history/README_20210527213345.md b/node_modules/node-domexception/.history/README_20210527213345.md new file mode 100644 index 00000000..58254167 --- /dev/null +++ b/node_modules/node-domexception/.history/README_20210527213345.md @@ -0,0 +1,36 @@ +# DOMException +An implementation of the DOMException class from NodeJS + +This package implements the [`DOMException`](https://developer.mozilla.org/en-US/docs/Web/API/DOMException) class, from NodeJS itself. (including the legacy codes) +NodeJS has DOMException built in, but it's not globally available, and you can't require/import it from somewhere. + +The only possible way is to use some web-ish tools that have been introduced into NodeJS that throws an error and catch the constructor. +This way you will have the same class that NodeJS has and you can check if the error is a instance of DOMException. +The instanceof check would not have worked with a custom class such as the DOMException provided by domenic which also is much larger in size. + +```js +import DOMException from 'node-domexception' +import { MessageChannel } from 'worker_threads' + +async function hello() { + const port = new MessageChannel().port1 + const ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) +} + +hello().catch(err => { + console.assert(err.name === 'DataCloneError') + console.assert(err.code === 25) + console.assert(err instanceof DOMException) +}) + +const e1 = new DOMException('Something went wrong', 'BadThingsError') +console.assert(e1.name === 'BadThingsError') +console.assert(e1.code === 0) + +const e2 = new DOMException('Another exciting error message', 'NoModificationAllowedError') +console.assert(e2.name === 'NoModificationAllowedError') +console.assert(e2.code === 7) + +console.assert(DOMException.INUSE_ATTRIBUTE_ERR === 10) +``` diff --git a/node_modules/node-domexception/.history/README_20210527213411.md b/node_modules/node-domexception/.history/README_20210527213411.md new file mode 100644 index 00000000..4c21ec8f --- /dev/null +++ b/node_modules/node-domexception/.history/README_20210527213411.md @@ -0,0 +1,36 @@ +# DOMException +An implementation of the DOMException class from NodeJS + +This package implements the [`DOMException`](https://developer.mozilla.org/en-US/docs/Web/API/DOMException) class that comes from NodeJS itself. (including the legacy codes) +NodeJS has DOMException built in, but it's not globally available, and you can't require/import it from somewhere. + +The only possible way is to use some web-ish tools that have been introduced into NodeJS that throws an error and catch the constructor. +This way you will have the same class that NodeJS has and you can check if the error is a instance of DOMException. +The instanceof check would not have worked with a custom class such as the DOMException provided by domenic which also is much larger in size. + +```js +import DOMException from 'node-domexception' +import { MessageChannel } from 'worker_threads' + +async function hello() { + const port = new MessageChannel().port1 + const ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) +} + +hello().catch(err => { + console.assert(err.name === 'DataCloneError') + console.assert(err.code === 25) + console.assert(err instanceof DOMException) +}) + +const e1 = new DOMException('Something went wrong', 'BadThingsError') +console.assert(e1.name === 'BadThingsError') +console.assert(e1.code === 0) + +const e2 = new DOMException('Another exciting error message', 'NoModificationAllowedError') +console.assert(e2.name === 'NoModificationAllowedError') +console.assert(e2.code === 7) + +console.assert(DOMException.INUSE_ATTRIBUTE_ERR === 10) +``` diff --git a/node_modules/node-domexception/.history/README_20210527213803.md b/node_modules/node-domexception/.history/README_20210527213803.md new file mode 100644 index 00000000..4cb85717 --- /dev/null +++ b/node_modules/node-domexception/.history/README_20210527213803.md @@ -0,0 +1,36 @@ +# DOMException +An implementation of the DOMException class from NodeJS + +This package exposes the [`DOMException`](https://developer.mozilla.org/en-US/docs/Web/API/DOMException) class that comes from NodeJS itself. (including all of the deprecated legacy codes) +NodeJS has it built in, but it's not globally available, and you can't require/import it from somewhere. + +The only possible way is to use some web-ish tools that have been introduced into NodeJS that throws an error and catch the constructor. +This way you will have the same class that NodeJS has and you can check if the error is a instance of DOMException. +The instanceof check would not have worked with a custom class such as the DOMException provided by domenic which also is much larger in size since it has to re-construct the hole class from the ground up. + +```js +import DOMException from 'node-domexception' +import { MessageChannel } from 'worker_threads' + +async function hello() { + const port = new MessageChannel().port1 + const ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) +} + +hello().catch(err => { + console.assert(err.name === 'DataCloneError') + console.assert(err.code === 25) + console.assert(err instanceof DOMException) +}) + +const e1 = new DOMException('Something went wrong', 'BadThingsError') +console.assert(e1.name === 'BadThingsError') +console.assert(e1.code === 0) + +const e2 = new DOMException('Another exciting error message', 'NoModificationAllowedError') +console.assert(e2.name === 'NoModificationAllowedError') +console.assert(e2.code === 7) + +console.assert(DOMException.INUSE_ATTRIBUTE_ERR === 10) +``` diff --git a/node_modules/node-domexception/.history/README_20210527214323.md b/node_modules/node-domexception/.history/README_20210527214323.md new file mode 100644 index 00000000..a32a91b1 --- /dev/null +++ b/node_modules/node-domexception/.history/README_20210527214323.md @@ -0,0 +1,38 @@ +# DOMException +An implementation of the DOMException class from NodeJS + +This package exposes the [`DOMException`](https://developer.mozilla.org/en-US/docs/Web/API/DOMException) class that comes from NodeJS itself. (including all of the deprecated legacy codes) +NodeJS has it built in, but it's not globally available, and you can't require/import it from somewhere. + +The only possible way is to use some web-ish tools that have been introduced into NodeJS that throws an error and catch the constructor. +This way you will have the same class that NodeJS has and you can check if the error is a instance of DOMException. +The instanceof check would not have worked with a custom class such as the DOMException provided by domenic which also is much larger in size since it has to re-construct the hole class from the ground up. + +(plz don't depend on this package in any other environment other than node >=10.5) + +```js +import DOMException from 'node-domexception' +import { MessageChannel } from 'worker_threads' + +async function hello() { + const port = new MessageChannel().port1 + const ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) +} + +hello().catch(err => { + console.assert(err.name === 'DataCloneError') + console.assert(err.code === 25) + console.assert(err instanceof DOMException) +}) + +const e1 = new DOMException('Something went wrong', 'BadThingsError') +console.assert(e1.name === 'BadThingsError') +console.assert(e1.code === 0) + +const e2 = new DOMException('Another exciting error message', 'NoModificationAllowedError') +console.assert(e2.name === 'NoModificationAllowedError') +console.assert(e2.code === 7) + +console.assert(DOMException.INUSE_ATTRIBUTE_ERR === 10) +``` diff --git a/node_modules/node-domexception/.history/README_20210527214408.md b/node_modules/node-domexception/.history/README_20210527214408.md new file mode 100644 index 00000000..a32a91b1 --- /dev/null +++ b/node_modules/node-domexception/.history/README_20210527214408.md @@ -0,0 +1,38 @@ +# DOMException +An implementation of the DOMException class from NodeJS + +This package exposes the [`DOMException`](https://developer.mozilla.org/en-US/docs/Web/API/DOMException) class that comes from NodeJS itself. (including all of the deprecated legacy codes) +NodeJS has it built in, but it's not globally available, and you can't require/import it from somewhere. + +The only possible way is to use some web-ish tools that have been introduced into NodeJS that throws an error and catch the constructor. +This way you will have the same class that NodeJS has and you can check if the error is a instance of DOMException. +The instanceof check would not have worked with a custom class such as the DOMException provided by domenic which also is much larger in size since it has to re-construct the hole class from the ground up. + +(plz don't depend on this package in any other environment other than node >=10.5) + +```js +import DOMException from 'node-domexception' +import { MessageChannel } from 'worker_threads' + +async function hello() { + const port = new MessageChannel().port1 + const ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) +} + +hello().catch(err => { + console.assert(err.name === 'DataCloneError') + console.assert(err.code === 25) + console.assert(err instanceof DOMException) +}) + +const e1 = new DOMException('Something went wrong', 'BadThingsError') +console.assert(e1.name === 'BadThingsError') +console.assert(e1.code === 0) + +const e2 = new DOMException('Another exciting error message', 'NoModificationAllowedError') +console.assert(e2.name === 'NoModificationAllowedError') +console.assert(e2.code === 7) + +console.assert(DOMException.INUSE_ATTRIBUTE_ERR === 10) +``` diff --git a/node_modules/node-domexception/.history/index_20210527203842.js b/node_modules/node-domexception/.history/index_20210527203842.js new file mode 100644 index 00000000..e69de29b diff --git a/node_modules/node-domexception/.history/index_20210527203947.js b/node_modules/node-domexception/.history/index_20210527203947.js new file mode 100644 index 00000000..b9a8b765 --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527203947.js @@ -0,0 +1,8 @@ +const { MessageChannel } = require('worker_threads') + +if (!globalThis.DOMException) { + const port = new MessageChannel().port1 + const ab = new ArrayBuffer() + try { port.postMessage(ab, [ab, ab]) } + catch (err) { globalThis.DOMException = err.constructor } +} diff --git a/node_modules/node-domexception/.history/index_20210527204259.js b/node_modules/node-domexception/.history/index_20210527204259.js new file mode 100644 index 00000000..e9332a8d --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527204259.js @@ -0,0 +1,9 @@ +if (!globalThis.DOMException) { + const { MessageChannel } = require('worker_threads') + const port = new MessageChannel().port1 + const ab = new ArrayBuffer() + try { port.postMessage(ab, [ab, ab]) } + catch (err) { globalThis.DOMException = err.constructor } +} + +module.exports diff --git a/node_modules/node-domexception/.history/index_20210527204418.js b/node_modules/node-domexception/.history/index_20210527204418.js new file mode 100644 index 00000000..cb362cc7 --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527204418.js @@ -0,0 +1,9 @@ +if (!globalThis.DOMException) { + const { MessageChannel } = require('worker_threads') + const port = new MessageChannel().port1 + const ab = new ArrayBuffer() + try { port.postMessage(ab, [ab, ab]) } + catch (err) { globalThis.DOMException = err.constructor } +} + +module.exports = globalThis.DOMException diff --git a/node_modules/node-domexception/.history/index_20210527204756.js b/node_modules/node-domexception/.history/index_20210527204756.js new file mode 100644 index 00000000..87d26554 --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527204756.js @@ -0,0 +1,11 @@ +/*! blob-to-buffer. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + const { MessageChannel } = require('worker_threads') + const port = new MessageChannel().port1 + const ab = new ArrayBuffer() + try { port.postMessage(ab, [ab, ab]) } + catch (err) { globalThis.DOMException = err.constructor } +} + +module.exports = globalThis.DOMException diff --git a/node_modules/node-domexception/.history/index_20210527204833.js b/node_modules/node-domexception/.history/index_20210527204833.js new file mode 100644 index 00000000..837ebdad --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527204833.js @@ -0,0 +1,11 @@ +/*! blob-to-buffer. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + const { MessageChannel } = require('worker_threads') + const port = new MessageChannel().port1 + const ab = new ArrayBuffer() + try { port.postMessage(ab, [ab, ab]) } + catch (err) { globalThis.DOMException = err.constructor } +} + +module.exports = globalThis.DOMException diff --git a/node_modules/node-domexception/.history/index_20210527211208.js b/node_modules/node-domexception/.history/index_20210527211208.js new file mode 100644 index 00000000..ba215ce8 --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527211208.js @@ -0,0 +1,15 @@ +/*! blob-to-buffer. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + var { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + try { port.postMessage(ab, [ab, ab]) } + catch (err) { + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException diff --git a/node_modules/node-domexception/.history/index_20210527211248.js b/node_modules/node-domexception/.history/index_20210527211248.js new file mode 100644 index 00000000..f5c434ee --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527211248.js @@ -0,0 +1,15 @@ +/*! blob-to-buffer. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + const { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + try { port.postMessage(ab, [ab, ab]) } + catch (err) { + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException diff --git a/node_modules/node-domexception/.history/index_20210527212722.js b/node_modules/node-domexception/.history/index_20210527212722.js new file mode 100644 index 00000000..91b3b526 --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527212722.js @@ -0,0 +1,23 @@ +/*! blob-to-buffer. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + const { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + try { port.postMessage(ab, [ab, ab]) } + catch (err) { + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException + +const e1 = new DOMException("Something went wrong", "BadThingsError"); +console.assert(e1.name === "BadThingsError"); +console.assert(e1.code === 0); + +const e2 = new DOMException("Another exciting error message", "NoModificationAllowedError"); +console.assert(e2.name === "NoModificationAllowedError"); +console.assert(e2.code === 7); diff --git a/node_modules/node-domexception/.history/index_20210527212731.js b/node_modules/node-domexception/.history/index_20210527212731.js new file mode 100644 index 00000000..cf288643 --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527212731.js @@ -0,0 +1,23 @@ +/*! blob-to-buffer. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + const { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + try { port.postMessage(ab, [ab, ab]) } + catch (err) { + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException + +const e1 = new DOMException("Something went wrong", "BadThingsError"); +console.assert(e1.name === "BadThingsError"); +console.assert(e1.code === 0); + +const e2 = new DOMException("Another exciting error message", "NoModificationAllowedError"); +console.assert(e2.name === "NoModificationAllowedError"); +console.assert(e2.code === 2); diff --git a/node_modules/node-domexception/.history/index_20210527212746.js b/node_modules/node-domexception/.history/index_20210527212746.js new file mode 100644 index 00000000..f5c434ee --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527212746.js @@ -0,0 +1,15 @@ +/*! blob-to-buffer. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + const { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + try { port.postMessage(ab, [ab, ab]) } + catch (err) { + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException diff --git a/node_modules/node-domexception/.history/index_20210527212900.js b/node_modules/node-domexception/.history/index_20210527212900.js new file mode 100644 index 00000000..efa2442c --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527212900.js @@ -0,0 +1,16 @@ +/*! blob-to-buffer. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + const { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + try { port.postMessage(ab, [ab, ab]) } + catch (err) { + console.log(err.code) + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException diff --git a/node_modules/node-domexception/.history/index_20210527213022.js b/node_modules/node-domexception/.history/index_20210527213022.js new file mode 100644 index 00000000..e59f047b --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527213022.js @@ -0,0 +1,16 @@ +/*! blob-to-buffer. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + const { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + try { port.postMessage(ab, [ab, ab]) } + catch (err) { + console.log(err.code, err.name, err.message) + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException diff --git a/node_modules/node-domexception/.history/index_20210527213822.js b/node_modules/node-domexception/.history/index_20210527213822.js new file mode 100644 index 00000000..7f4e13dc --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527213822.js @@ -0,0 +1,16 @@ +/*! node-DOMException. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + const { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + try { port.postMessage(ab, [ab, ab]) } + catch (err) { + console.log(err.code, err.name, err.message) + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException diff --git a/node_modules/node-domexception/.history/index_20210527213843.js b/node_modules/node-domexception/.history/index_20210527213843.js new file mode 100644 index 00000000..ee75b730 --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527213843.js @@ -0,0 +1,17 @@ +/*! node-DOMException. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + try { + const { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) + catch (err) { + console.log(err.code, err.name, err.message) + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException diff --git a/node_modules/node-domexception/.history/index_20210527213852.js b/node_modules/node-domexception/.history/index_20210527213852.js new file mode 100644 index 00000000..a82bee3a --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527213852.js @@ -0,0 +1,17 @@ +/*! node-DOMException. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + try { + const { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) + } catch (err) { + console.log(err.code, err.name, err.message) + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException diff --git a/node_modules/node-domexception/.history/index_20210527213910.js b/node_modules/node-domexception/.history/index_20210527213910.js new file mode 100644 index 00000000..1e1ca29b --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527213910.js @@ -0,0 +1,16 @@ +/*! node-DOMException. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + try { + const { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) + } catch (err) { + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException diff --git a/node_modules/node-domexception/.history/index_20210527214034.js b/node_modules/node-domexception/.history/index_20210527214034.js new file mode 100644 index 00000000..b7bbe951 --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527214034.js @@ -0,0 +1,16 @@ +/*! node-domexception. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + try { + const { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) + } catch (err) { + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException diff --git a/node_modules/node-domexception/.history/index_20210527214643.js b/node_modules/node-domexception/.history/index_20210527214643.js new file mode 100644 index 00000000..92ed8477 --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527214643.js @@ -0,0 +1,41 @@ +/*! node-domexception. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + try { + const { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) + } catch (err) { + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException + + +const { MessageChannel } = require('worker_threads') + +async function hello() { + const port = new MessageChannel().port1 + const ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) +} + +hello().catch(err => { + console.assert(err.name === 'DataCloneError') + console.assert(err.code === 25) + console.assert(err instanceof DOMException) +}) + +const e1 = new DOMException('Something went wrong', 'BadThingsError') +console.assert(e1.name === 'BadThingsError') +console.assert(e1.code === 0) + +const e2 = new DOMException('Another exciting error message', 'NoModificationAllowedError') +console.assert(e2.name === 'NoModificationAllowedError') +console.assert(e2.code === 7) + +console.assert(DOMException.INUSE_ATTRIBUTE_ERR === 10) diff --git a/node_modules/node-domexception/.history/index_20210527214654.js b/node_modules/node-domexception/.history/index_20210527214654.js new file mode 100644 index 00000000..6d5cb8e5 --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527214654.js @@ -0,0 +1,41 @@ +/*! node-domexception. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + try { + const { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) + } catch (err) { + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException + + +const { MessageChannel } = require('worker_threads') + +async function hello() { + const port = new MessageChannel().port1 + const ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) +} + +hello().catch(err => { + console.assert(err.name === 'DataCloneError') + console.assert(err.code === 21) + console.assert(err instanceof DOMException) +}) + +const e1 = new DOMException('Something went wrong', 'BadThingsError') +console.assert(e1.name === 'BadThingsError') +console.assert(e1.code === 0) + +const e2 = new DOMException('Another exciting error message', 'NoModificationAllowedError') +console.assert(e2.name === 'NoModificationAllowedError') +console.assert(e2.code === 7) + +console.assert(DOMException.INUSE_ATTRIBUTE_ERR === 10) diff --git a/node_modules/node-domexception/.history/index_20210527214700.js b/node_modules/node-domexception/.history/index_20210527214700.js new file mode 100644 index 00000000..b7bbe951 --- /dev/null +++ b/node_modules/node-domexception/.history/index_20210527214700.js @@ -0,0 +1,16 @@ +/*! node-domexception. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + try { + const { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) + } catch (err) { + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException diff --git a/node_modules/node-domexception/.history/package_20210527203733.json b/node_modules/node-domexception/.history/package_20210527203733.json new file mode 100644 index 00000000..5eeb306d --- /dev/null +++ b/node_modules/node-domexception/.history/package_20210527203733.json @@ -0,0 +1,19 @@ +{ + "name": "domexception", + "version": "1.0.0", + "description": "An implementation of the DOMException class from NodeJS", + "main": "index.js", + "scripts": { + "test": "echo \"Error: no test specified\" && exit 1" + }, + "repository": { + "type": "git", + "url": "git+https://github.com/jimmywarting/node-domexception.git" + }, + "author": "", + "license": "ISC", + "bugs": { + "url": "https://github.com/jimmywarting/node-domexception/issues" + }, + "homepage": "https://github.com/jimmywarting/node-domexception#readme" +} diff --git a/node_modules/node-domexception/.history/package_20210527203825.json b/node_modules/node-domexception/.history/package_20210527203825.json new file mode 100644 index 00000000..4ca17135 --- /dev/null +++ b/node_modules/node-domexception/.history/package_20210527203825.json @@ -0,0 +1,16 @@ +{ + "name": "node-domexception", + "version": "1.0.0", + "description": "An implementation of the DOMException class from NodeJS", + "main": "index.js", + "repository": { + "type": "git", + "url": "git+https://github.com/jimmywarting/node-domexception.git" + }, + "author": "Jimmy Wärting", + "license": "MIT", + "bugs": { + "url": "https://github.com/jimmywarting/node-domexception/issues" + }, + "homepage": "https://github.com/jimmywarting/node-domexception#readme" +} diff --git a/node_modules/node-domexception/.history/package_20210527204621.json b/node_modules/node-domexception/.history/package_20210527204621.json new file mode 100644 index 00000000..3c414e93 --- /dev/null +++ b/node_modules/node-domexception/.history/package_20210527204621.json @@ -0,0 +1,19 @@ +{ + "name": "node-domexception", + "version": "1.0.0", + "description": "An implementation of the DOMException class from NodeJS", + "main": "index.js", + "repository": { + "type": "git", + "url": "git+https://github.com/jimmywarting/node-domexception.git" + }, + "engines": { + "node": ">=10.5.0" + }, + "author": "Jimmy Wärting", + "license": "MIT", + "bugs": { + "url": "https://github.com/jimmywarting/node-domexception/issues" + }, + "homepage": "https://github.com/jimmywarting/node-domexception#readme" +} diff --git a/node_modules/node-domexception/.history/package_20210527204913.json b/node_modules/node-domexception/.history/package_20210527204913.json new file mode 100644 index 00000000..dbbb5d24 --- /dev/null +++ b/node_modules/node-domexception/.history/package_20210527204913.json @@ -0,0 +1,25 @@ +{ + "name": "node-domexception", + "version": "1.0.0", + "description": "An implementation of the DOMException class from NodeJS", + "main": "index.js", + "repository": { + "type": "git", + "url": "git+https://github.com/jimmywarting/node-domexception.git" + }, + "engines": { + "node": ">=10.5.0" + }, + "author": "Jimmy Wärting", + "license": "MIT", + "bugs": { + "url": "https://github.com/jimmywarting/node-domexception/issues" + }, + "homepage": "https://github.com/jimmywarting/node-domexception#readme", + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/jimmywarting" + } + ] +} diff --git a/node_modules/node-domexception/.history/package_20210527204925.json b/node_modules/node-domexception/.history/package_20210527204925.json new file mode 100644 index 00000000..dbbb5d24 --- /dev/null +++ b/node_modules/node-domexception/.history/package_20210527204925.json @@ -0,0 +1,25 @@ +{ + "name": "node-domexception", + "version": "1.0.0", + "description": "An implementation of the DOMException class from NodeJS", + "main": "index.js", + "repository": { + "type": "git", + "url": "git+https://github.com/jimmywarting/node-domexception.git" + }, + "engines": { + "node": ">=10.5.0" + }, + "author": "Jimmy Wärting", + "license": "MIT", + "bugs": { + "url": "https://github.com/jimmywarting/node-domexception/issues" + }, + "homepage": "https://github.com/jimmywarting/node-domexception#readme", + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/jimmywarting" + } + ] +} diff --git a/node_modules/node-domexception/.history/package_20210527205145.json b/node_modules/node-domexception/.history/package_20210527205145.json new file mode 100644 index 00000000..cd08e704 --- /dev/null +++ b/node_modules/node-domexception/.history/package_20210527205145.json @@ -0,0 +1,29 @@ +{ + "name": "node-domexception", + "version": "1.0.0", + "description": "An implementation of the DOMException class from NodeJS", + "main": "index.js", + "repository": { + "type": "git", + "url": "git+https://github.com/jimmywarting/node-domexception.git" + }, + "engines": { + "node": ">=10.5.0" + }, + "author": "Jimmy Wärting", + "license": "MIT", + "bugs": { + "url": "https://github.com/jimmywarting/node-domexception/issues" + }, + "homepage": "https://github.com/jimmywarting/node-domexception#readme", + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/jimmywarting" + }, + { + "type": "github", + "url": "https://paypal.me/jimmywarting" + } + ] +} diff --git a/node_modules/node-domexception/.history/package_20210527205156.json b/node_modules/node-domexception/.history/package_20210527205156.json new file mode 100644 index 00000000..cd08e704 --- /dev/null +++ b/node_modules/node-domexception/.history/package_20210527205156.json @@ -0,0 +1,29 @@ +{ + "name": "node-domexception", + "version": "1.0.0", + "description": "An implementation of the DOMException class from NodeJS", + "main": "index.js", + "repository": { + "type": "git", + "url": "git+https://github.com/jimmywarting/node-domexception.git" + }, + "engines": { + "node": ">=10.5.0" + }, + "author": "Jimmy Wärting", + "license": "MIT", + "bugs": { + "url": "https://github.com/jimmywarting/node-domexception/issues" + }, + "homepage": "https://github.com/jimmywarting/node-domexception#readme", + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/jimmywarting" + }, + { + "type": "github", + "url": "https://paypal.me/jimmywarting" + } + ] +} diff --git a/node_modules/node-domexception/.history/test_20210527205603.js b/node_modules/node-domexception/.history/test_20210527205603.js new file mode 100644 index 00000000..e69de29b diff --git a/node_modules/node-domexception/.history/test_20210527205957.js b/node_modules/node-domexception/.history/test_20210527205957.js new file mode 100644 index 00000000..73feac5f --- /dev/null +++ b/node_modules/node-domexception/.history/test_20210527205957.js @@ -0,0 +1,3 @@ +require('./index.js') + +console.log(DOMException.INDEX_SIZE_ERR) diff --git a/node_modules/node-domexception/.history/test_20210527210021.js b/node_modules/node-domexception/.history/test_20210527210021.js new file mode 100644 index 00000000..be474916 --- /dev/null +++ b/node_modules/node-domexception/.history/test_20210527210021.js @@ -0,0 +1,3 @@ +const e = require('./index.js') + +console.log(e.INDEX_SIZE_ERR) diff --git a/node_modules/node-domexception/LICENSE b/node_modules/node-domexception/LICENSE new file mode 100644 index 00000000..bc8ceb7f --- /dev/null +++ b/node_modules/node-domexception/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2021 Jimmy Wärting + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/node_modules/node-domexception/README.md b/node_modules/node-domexception/README.md new file mode 100644 index 00000000..a3694614 --- /dev/null +++ b/node_modules/node-domexception/README.md @@ -0,0 +1,46 @@ +# DOMException +An implementation of the DOMException class from NodeJS + +NodeJS has DOMException built in, but it's not globally available, and you can't require/import it from somewhere. + +This package exposes the [`DOMException`](https://developer.mozilla.org/en-US/docs/Web/API/DOMException) class that comes from NodeJS itself. (including all of the legacy codes) + +(plz don't depend on this package in any other environment other than node >=10.5) + +```js +import DOMException from 'node-domexception' +import { MessageChannel } from 'worker_threads' + +async function hello() { + const port = new MessageChannel().port1 + const ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) +} + +hello().catch(err => { + console.assert(err.name === 'DataCloneError') + console.assert(err.code === 25) + console.assert(err instanceof DOMException) +}) + +const e1 = new DOMException('Something went wrong', 'BadThingsError') +console.assert(e1.name === 'BadThingsError') +console.assert(e1.code === 0) + +const e2 = new DOMException('Another exciting error message', 'NoModificationAllowedError') +console.assert(e2.name === 'NoModificationAllowedError') +console.assert(e2.code === 7) + +console.assert(DOMException.INUSE_ATTRIBUTE_ERR === 10) +``` + +# Background + +The only possible way is to use some web-ish tools that have been introduced into NodeJS that throws a DOMException and catch the constructor. This is exactly what this package dose for you and exposes it.
+This way you will have the same class that NodeJS has and you can check if the error is a instance of DOMException.
+The instanceof check would not have worked with a custom class such as the DOMException provided by domenic which also is much larger in size since it has to re-construct the hole class from the ground up. + +The DOMException is used in many places such as the Fetch API, File & Blobs, PostMessaging and more.
+Why they decided to call it **DOM**, I don't know + +Please consider sponsoring if you find this helpful diff --git a/node_modules/node-domexception/index.js b/node_modules/node-domexception/index.js new file mode 100644 index 00000000..b7bbe951 --- /dev/null +++ b/node_modules/node-domexception/index.js @@ -0,0 +1,16 @@ +/*! node-domexception. MIT License. Jimmy Wärting */ + +if (!globalThis.DOMException) { + try { + const { MessageChannel } = require('worker_threads'), + port = new MessageChannel().port1, + ab = new ArrayBuffer() + port.postMessage(ab, [ab, ab]) + } catch (err) { + err.constructor.name === 'DOMException' && ( + globalThis.DOMException = err.constructor + ) + } +} + +module.exports = globalThis.DOMException diff --git a/node_modules/node-domexception/package.json b/node_modules/node-domexception/package.json new file mode 100644 index 00000000..cd08e704 --- /dev/null +++ b/node_modules/node-domexception/package.json @@ -0,0 +1,29 @@ +{ + "name": "node-domexception", + "version": "1.0.0", + "description": "An implementation of the DOMException class from NodeJS", + "main": "index.js", + "repository": { + "type": "git", + "url": "git+https://github.com/jimmywarting/node-domexception.git" + }, + "engines": { + "node": ">=10.5.0" + }, + "author": "Jimmy Wärting", + "license": "MIT", + "bugs": { + "url": "https://github.com/jimmywarting/node-domexception/issues" + }, + "homepage": "https://github.com/jimmywarting/node-domexception#readme", + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/jimmywarting" + }, + { + "type": "github", + "url": "https://paypal.me/jimmywarting" + } + ] +} diff --git a/node_modules/node-fetch/@types/index.d.ts b/node_modules/node-fetch/@types/index.d.ts new file mode 100644 index 00000000..274ca03a --- /dev/null +++ b/node_modules/node-fetch/@types/index.d.ts @@ -0,0 +1,219 @@ +/// + +import {RequestOptions} from 'http'; +import {FormData} from 'formdata-polyfill/esm.min.js'; +import { + Blob, + blobFrom, + blobFromSync, + File, + fileFrom, + fileFromSync +} from 'fetch-blob/from.js'; + +type AbortSignal = { + readonly aborted: boolean; + + addEventListener: (type: 'abort', listener: (this: AbortSignal) => void) => void; + removeEventListener: (type: 'abort', listener: (this: AbortSignal) => void) => void; +}; + +export type HeadersInit = Headers | Record | Iterable | Iterable>; + +export { + FormData, + Blob, + blobFrom, + blobFromSync, + File, + fileFrom, + fileFromSync +}; + +/** + * This Fetch API interface allows you to perform various actions on HTTP request and response headers. + * These actions include retrieving, setting, adding to, and removing. + * A Headers object has an associated header list, which is initially empty and consists of zero or more name and value pairs. + * You can add to this using methods like append() (see Examples.) + * In all methods of this interface, header names are matched by case-insensitive byte sequence. + * */ +export class Headers { + constructor(init?: HeadersInit); + + append(name: string, value: string): void; + delete(name: string): void; + get(name: string): string | null; + has(name: string): boolean; + set(name: string, value: string): void; + forEach( + callbackfn: (value: string, key: string, parent: Headers) => void, + thisArg?: any + ): void; + + [Symbol.iterator](): IterableIterator<[string, string]>; + /** + * Returns an iterator allowing to go through all key/value pairs contained in this object. + */ + entries(): IterableIterator<[string, string]>; + /** + * Returns an iterator allowing to go through all keys of the key/value pairs contained in this object. + */ + keys(): IterableIterator; + /** + * Returns an iterator allowing to go through all values of the key/value pairs contained in this object. + */ + values(): IterableIterator; + + /** Node-fetch extension */ + raw(): Record; +} + +export interface RequestInit { + /** + * A BodyInit object or null to set request's body. + */ + body?: BodyInit | null; + /** + * A Headers object, an object literal, or an array of two-item arrays to set request's headers. + */ + headers?: HeadersInit; + /** + * A string to set request's method. + */ + method?: string; + /** + * A string indicating whether request follows redirects, results in an error upon encountering a redirect, or returns the redirect (in an opaque fashion). Sets request's redirect. + */ + redirect?: RequestRedirect; + /** + * An AbortSignal to set request's signal. + */ + signal?: AbortSignal | null; + /** + * A string whose value is a same-origin URL, "about:client", or the empty string, to set request’s referrer. + */ + referrer?: string; + /** + * A referrer policy to set request’s referrerPolicy. + */ + referrerPolicy?: ReferrerPolicy; + + // Node-fetch extensions to the whatwg/fetch spec + agent?: RequestOptions['agent'] | ((parsedUrl: URL) => RequestOptions['agent']); + compress?: boolean; + counter?: number; + follow?: number; + hostname?: string; + port?: number; + protocol?: string; + size?: number; + highWaterMark?: number; + insecureHTTPParser?: boolean; +} + +export interface ResponseInit { + headers?: HeadersInit; + status?: number; + statusText?: string; +} + +export type BodyInit = + | Blob + | Buffer + | URLSearchParams + | FormData + | NodeJS.ReadableStream + | string; +declare class BodyMixin { + constructor(body?: BodyInit, options?: {size?: number}); + + readonly body: NodeJS.ReadableStream | null; + readonly bodyUsed: boolean; + readonly size: number; + + /** @deprecated Use `body.arrayBuffer()` instead. */ + buffer(): Promise; + arrayBuffer(): Promise; + formData(): Promise; + blob(): Promise; + json(): Promise; + text(): Promise; +} + +// `Body` must not be exported as a class since it's not exported from the JavaScript code. +export interface Body extends Pick {} + +export type RequestRedirect = 'error' | 'follow' | 'manual'; +export type ReferrerPolicy = '' | 'no-referrer' | 'no-referrer-when-downgrade' | 'same-origin' | 'origin' | 'strict-origin' | 'origin-when-cross-origin' | 'strict-origin-when-cross-origin' | 'unsafe-url'; +export type RequestInfo = string | Request; +export class Request extends BodyMixin { + constructor(input: URL | RequestInfo, init?: RequestInit); + + /** + * Returns a Headers object consisting of the headers associated with request. Note that headers added in the network layer by the user agent will not be accounted for in this object, e.g., the "Host" header. + */ + readonly headers: Headers; + /** + * Returns request's HTTP method, which is "GET" by default. + */ + readonly method: string; + /** + * Returns the redirect mode associated with request, which is a string indicating how redirects for the request will be handled during fetching. A request will follow redirects by default. + */ + readonly redirect: RequestRedirect; + /** + * Returns the signal associated with request, which is an AbortSignal object indicating whether or not request has been aborted, and its abort event handler. + */ + readonly signal: AbortSignal; + /** + * Returns the URL of request as a string. + */ + readonly url: string; + /** + * A string whose value is a same-origin URL, "about:client", or the empty string, to set request’s referrer. + */ + readonly referrer: string; + /** + * A referrer policy to set request’s referrerPolicy. + */ + readonly referrerPolicy: ReferrerPolicy; + clone(): Request; +} + +type ResponseType = 'basic' | 'cors' | 'default' | 'error' | 'opaque' | 'opaqueredirect'; + +export class Response extends BodyMixin { + constructor(body?: BodyInit | null, init?: ResponseInit); + + readonly headers: Headers; + readonly ok: boolean; + readonly redirected: boolean; + readonly status: number; + readonly statusText: string; + readonly type: ResponseType; + readonly url: string; + clone(): Response; + + static error(): Response; + static redirect(url: string, status?: number): Response; + static json(data: any, init?: ResponseInit): Response; +} + +export class FetchError extends Error { + constructor(message: string, type: string, systemError?: Record); + + name: 'FetchError'; + [Symbol.toStringTag]: 'FetchError'; + type: string; + code?: string; + errno?: string; +} + +export class AbortError extends Error { + type: string; + name: 'AbortError'; + [Symbol.toStringTag]: 'AbortError'; +} + +export function isRedirect(code: number): boolean; +export default function fetch(url: URL | RequestInfo, init?: RequestInit): Promise; diff --git a/node_modules/node-fetch/LICENSE.md b/node_modules/node-fetch/LICENSE.md new file mode 100644 index 00000000..41ca1b6e --- /dev/null +++ b/node_modules/node-fetch/LICENSE.md @@ -0,0 +1,22 @@ +The MIT License (MIT) + +Copyright (c) 2016 - 2020 Node Fetch Team + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. + diff --git a/node_modules/node-fetch/README.md b/node_modules/node-fetch/README.md new file mode 100644 index 00000000..badc2b19 --- /dev/null +++ b/node_modules/node-fetch/README.md @@ -0,0 +1,872 @@ +
+ Node Fetch +
+

A light-weight module that brings Fetch API to Node.js.

+ Build status + Coverage status + Current version + Install size + Mentioned in Awesome Node.js + Discord +
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+ +--- + +**You might be looking for the [v2 docs](https://github.com/node-fetch/node-fetch/tree/2.x#readme)** + + + +- [Motivation](#motivation) +- [Features](#features) +- [Difference from client-side fetch](#difference-from-client-side-fetch) +- [Installation](#installation) +- [Loading and configuring the module](#loading-and-configuring-the-module) +- [Upgrading](#upgrading) +- [Common Usage](#common-usage) + - [Plain text or HTML](#plain-text-or-html) + - [JSON](#json) + - [Simple Post](#simple-post) + - [Post with JSON](#post-with-json) + - [Post with form parameters](#post-with-form-parameters) + - [Handling exceptions](#handling-exceptions) + - [Handling client and server errors](#handling-client-and-server-errors) + - [Handling cookies](#handling-cookies) +- [Advanced Usage](#advanced-usage) + - [Streams](#streams) + - [Accessing Headers and other Metadata](#accessing-headers-and-other-metadata) + - [Extract Set-Cookie Header](#extract-set-cookie-header) + - [Post data using a file](#post-data-using-a-file) + - [Request cancellation with AbortSignal](#request-cancellation-with-abortsignal) +- [API](#api) + - [fetch(url[, options])](#fetchurl-options) + - [Options](#options) + - [Default Headers](#default-headers) + - [Custom Agent](#custom-agent) + - [Custom highWaterMark](#custom-highwatermark) + - [Insecure HTTP Parser](#insecure-http-parser) + - [Class: Request](#class-request) + - [new Request(input[, options])](#new-requestinput-options) + - [Class: Response](#class-response) + - [new Response([body[, options]])](#new-responsebody-options) + - [response.ok](#responseok) + - [response.redirected](#responseredirected) + - [response.type](#responsetype) + - [Class: Headers](#class-headers) + - [new Headers([init])](#new-headersinit) + - [Interface: Body](#interface-body) + - [body.body](#bodybody) + - [body.bodyUsed](#bodybodyused) + - [body.arrayBuffer()](#bodyarraybuffer) + - [body.blob()](#bodyblob) + - [body.formData()](#formdata) + - [body.json()](#bodyjson) + - [body.text()](#bodytext) + - [Class: FetchError](#class-fetcherror) + - [Class: AbortError](#class-aborterror) +- [TypeScript](#typescript) +- [Acknowledgement](#acknowledgement) +- [Team](#team) + - [Former](#former) +- [License](#license) + + + +## Motivation + +Instead of implementing `XMLHttpRequest` in Node.js to run browser-specific [Fetch polyfill](https://github.com/github/fetch), why not go from native `http` to `fetch` API directly? Hence, `node-fetch`, minimal code for a `window.fetch` compatible API on Node.js runtime. + +See Jason Miller's [isomorphic-unfetch](https://www.npmjs.com/package/isomorphic-unfetch) or Leonardo Quixada's [cross-fetch](https://github.com/lquixada/cross-fetch) for isomorphic usage (exports `node-fetch` for server-side, `whatwg-fetch` for client-side). + +## Features + +- Stay consistent with `window.fetch` API. +- Make conscious trade-off when following [WHATWG fetch spec][whatwg-fetch] and [stream spec](https://streams.spec.whatwg.org/) implementation details, document known differences. +- Use native promise and async functions. +- Use native Node streams for body, on both request and response. +- Decode content encoding (gzip/deflate/brotli) properly, and convert string output (such as `res.text()` and `res.json()`) to UTF-8 automatically. +- Useful extensions such as redirect limit, response size limit, [explicit errors][error-handling.md] for troubleshooting. + +## Difference from client-side fetch + +- See known differences: + - [As of v3.x](docs/v3-LIMITS.md) + - [As of v2.x](docs/v2-LIMITS.md) +- If you happen to use a missing feature that `window.fetch` offers, feel free to open an issue. +- Pull requests are welcomed too! + +## Installation + +Current stable release (`3.x`) requires at least Node.js 12.20.0. + +```sh +npm install node-fetch +``` + +## Loading and configuring the module + +### ES Modules (ESM) + +```js +import fetch from 'node-fetch'; +``` + +### CommonJS + +`node-fetch` from v3 is an ESM-only module - you are not able to import it with `require()`. + +If you cannot switch to ESM, please use v2 which remains compatible with CommonJS. Critical bug fixes will continue to be published for v2. + +```sh +npm install node-fetch@2 +``` + +Alternatively, you can use the async `import()` function from CommonJS to load `node-fetch` asynchronously: + +```js +// mod.cjs +const fetch = (...args) => import('node-fetch').then(({default: fetch}) => fetch(...args)); +``` + +### Providing global access + +To use `fetch()` without importing it, you can patch the `global` object in node: + +```js +// fetch-polyfill.js +import fetch, { + Blob, + blobFrom, + blobFromSync, + File, + fileFrom, + fileFromSync, + FormData, + Headers, + Request, + Response, +} from 'node-fetch' + +if (!globalThis.fetch) { + globalThis.fetch = fetch + globalThis.Headers = Headers + globalThis.Request = Request + globalThis.Response = Response +} + +// index.js +import './fetch-polyfill' + +// ... +``` + +## Upgrading + +Using an old version of node-fetch? Check out the following files: + +- [2.x to 3.x upgrade guide](docs/v3-UPGRADE-GUIDE.md) +- [1.x to 2.x upgrade guide](docs/v2-UPGRADE-GUIDE.md) +- [Changelog](https://github.com/node-fetch/node-fetch/releases) + +## Common Usage + +NOTE: The documentation below is up-to-date with `3.x` releases, if you are using an older version, please check how to [upgrade](#upgrading). + +### Plain text or HTML + +```js +import fetch from 'node-fetch'; + +const response = await fetch('https://github.com/'); +const body = await response.text(); + +console.log(body); +``` + +### JSON + +```js +import fetch from 'node-fetch'; + +const response = await fetch('https://api.github.com/users/github'); +const data = await response.json(); + +console.log(data); +``` + +### Simple Post + +```js +import fetch from 'node-fetch'; + +const response = await fetch('https://httpbin.org/post', {method: 'POST', body: 'a=1'}); +const data = await response.json(); + +console.log(data); +``` + +### Post with JSON + +```js +import fetch from 'node-fetch'; + +const body = {a: 1}; + +const response = await fetch('https://httpbin.org/post', { + method: 'post', + body: JSON.stringify(body), + headers: {'Content-Type': 'application/json'} +}); +const data = await response.json(); + +console.log(data); +``` + +### Post with form parameters + +`URLSearchParams` is available on the global object in Node.js as of v10.0.0. See [official documentation](https://nodejs.org/api/url.html#url_class_urlsearchparams) for more usage methods. + +NOTE: The `Content-Type` header is only set automatically to `x-www-form-urlencoded` when an instance of `URLSearchParams` is given as such: + +```js +import fetch from 'node-fetch'; + +const params = new URLSearchParams(); +params.append('a', 1); + +const response = await fetch('https://httpbin.org/post', {method: 'POST', body: params}); +const data = await response.json(); + +console.log(data); +``` + +### Handling exceptions + +NOTE: 3xx-5xx responses are _NOT_ exceptions, and should be handled in `then()`, see the next section. + +Wrapping the fetch function into a `try/catch` block will catch _all_ exceptions, such as errors originating from node core libraries, like network errors, and operational errors which are instances of FetchError. See the [error handling document][error-handling.md] for more details. + +```js +import fetch from 'node-fetch'; + +try { + await fetch('https://domain.invalid/'); +} catch (error) { + console.log(error); +} +``` + +### Handling client and server errors + +It is common to create a helper function to check that the response contains no client (4xx) or server (5xx) error responses: + +```js +import fetch from 'node-fetch'; + +class HTTPResponseError extends Error { + constructor(response) { + super(`HTTP Error Response: ${response.status} ${response.statusText}`); + this.response = response; + } +} + +const checkStatus = response => { + if (response.ok) { + // response.status >= 200 && response.status < 300 + return response; + } else { + throw new HTTPResponseError(response); + } +} + +const response = await fetch('https://httpbin.org/status/400'); + +try { + checkStatus(response); +} catch (error) { + console.error(error); + + const errorBody = await error.response.text(); + console.error(`Error body: ${errorBody}`); +} +``` + +### Handling cookies + +Cookies are not stored by default. However, cookies can be extracted and passed by manipulating request and response headers. See [Extract Set-Cookie Header](#extract-set-cookie-header) for details. + +## Advanced Usage + +### Streams + +The "Node.js way" is to use streams when possible. You can pipe `res.body` to another stream. This example uses [stream.pipeline](https://nodejs.org/api/stream.html#stream_stream_pipeline_streams_callback) to attach stream error handlers and wait for the download to complete. + +```js +import {createWriteStream} from 'node:fs'; +import {pipeline} from 'node:stream'; +import {promisify} from 'node:util' +import fetch from 'node-fetch'; + +const streamPipeline = promisify(pipeline); + +const response = await fetch('https://github.githubassets.com/images/modules/logos_page/Octocat.png'); + +if (!response.ok) throw new Error(`unexpected response ${response.statusText}`); + +await streamPipeline(response.body, createWriteStream('./octocat.png')); +``` + +In Node.js 14 you can also use async iterators to read `body`; however, be careful to catch +errors -- the longer a response runs, the more likely it is to encounter an error. + +```js +import fetch from 'node-fetch'; + +const response = await fetch('https://httpbin.org/stream/3'); + +try { + for await (const chunk of response.body) { + console.dir(JSON.parse(chunk.toString())); + } +} catch (err) { + console.error(err.stack); +} +``` + +In Node.js 12 you can also use async iterators to read `body`; however, async iterators with streams +did not mature until Node.js 14, so you need to do some extra work to ensure you handle errors +directly from the stream and wait on it response to fully close. + +```js +import fetch from 'node-fetch'; + +const read = async body => { + let error; + body.on('error', err => { + error = err; + }); + + for await (const chunk of body) { + console.dir(JSON.parse(chunk.toString())); + } + + return new Promise((resolve, reject) => { + body.on('close', () => { + error ? reject(error) : resolve(); + }); + }); +}; + +try { + const response = await fetch('https://httpbin.org/stream/3'); + await read(response.body); +} catch (err) { + console.error(err.stack); +} +``` + +### Accessing Headers and other Metadata + +```js +import fetch from 'node-fetch'; + +const response = await fetch('https://github.com/'); + +console.log(response.ok); +console.log(response.status); +console.log(response.statusText); +console.log(response.headers.raw()); +console.log(response.headers.get('content-type')); +``` + +### Extract Set-Cookie Header + +Unlike browsers, you can access raw `Set-Cookie` headers manually using `Headers.raw()`. This is a `node-fetch` only API. + +```js +import fetch from 'node-fetch'; + +const response = await fetch('https://example.com'); + +// Returns an array of values, instead of a string of comma-separated values +console.log(response.headers.raw()['set-cookie']); +``` + +### Post data using a file + +```js +import fetch, { + Blob, + blobFrom, + blobFromSync, + File, + fileFrom, + fileFromSync, +} from 'node-fetch' + +const mimetype = 'text/plain' +const blob = fileFromSync('./input.txt', mimetype) +const url = 'https://httpbin.org/post' + +const response = await fetch(url, { method: 'POST', body: blob }) +const data = await response.json() + +console.log(data) +``` + +node-fetch comes with a spec-compliant [FormData] implementations for posting +multipart/form-data payloads + +```js +import fetch, { FormData, File, fileFrom } from 'node-fetch' + +const httpbin = 'https://httpbin.org/post' +const formData = new FormData() +const binary = new Uint8Array([ 97, 98, 99 ]) +const abc = new File([binary], 'abc.txt', { type: 'text/plain' }) + +formData.set('greeting', 'Hello, world!') +formData.set('file-upload', abc, 'new name.txt') + +const response = await fetch(httpbin, { method: 'POST', body: formData }) +const data = await response.json() + +console.log(data) +``` + +If you for some reason need to post a stream coming from any arbitrary place, +then you can append a [Blob] or a [File] look-a-like item. + +The minimum requirement is that it has: +1. A `Symbol.toStringTag` getter or property that is either `Blob` or `File` +2. A known size. +3. And either a `stream()` method or a `arrayBuffer()` method that returns a ArrayBuffer. + +The `stream()` must return any async iterable object as long as it yields Uint8Array (or Buffer) +so Node.Readable streams and whatwg streams works just fine. + +```js +formData.append('upload', { + [Symbol.toStringTag]: 'Blob', + size: 3, + *stream() { + yield new Uint8Array([97, 98, 99]) + }, + arrayBuffer() { + return new Uint8Array([97, 98, 99]).buffer + } +}, 'abc.txt') +``` + +### Request cancellation with AbortSignal + +You may cancel requests with `AbortController`. A suggested implementation is [`abort-controller`](https://www.npmjs.com/package/abort-controller). + +An example of timing out a request after 150ms could be achieved as the following: + +```js +import fetch, { AbortError } from 'node-fetch'; + +// AbortController was added in node v14.17.0 globally +const AbortController = globalThis.AbortController || await import('abort-controller') + +const controller = new AbortController(); +const timeout = setTimeout(() => { + controller.abort(); +}, 150); + +try { + const response = await fetch('https://example.com', {signal: controller.signal}); + const data = await response.json(); +} catch (error) { + if (error instanceof AbortError) { + console.log('request was aborted'); + } +} finally { + clearTimeout(timeout); +} +``` + +See [test cases](https://github.com/node-fetch/node-fetch/blob/master/test/) for more examples. + +## API + +### fetch(url[, options]) + +- `url` A string representing the URL for fetching +- `options` [Options](#fetch-options) for the HTTP(S) request +- Returns: Promise<[Response](#class-response)> + +Perform an HTTP(S) fetch. + +`url` should be an absolute URL, such as `https://example.com/`. A path-relative URL (`/file/under/root`) or protocol-relative URL (`//can-be-http-or-https.com/`) will result in a rejected `Promise`. + + + +### Options + +The default values are shown after each option key. + +```js +{ + // These properties are part of the Fetch Standard + method: 'GET', + headers: {}, // Request headers. format is the identical to that accepted by the Headers constructor (see below) + body: null, // Request body. can be null, or a Node.js Readable stream + redirect: 'follow', // Set to `manual` to extract redirect headers, `error` to reject redirect + signal: null, // Pass an instance of AbortSignal to optionally abort requests + + // The following properties are node-fetch extensions + follow: 20, // maximum redirect count. 0 to not follow redirect + compress: true, // support gzip/deflate content encoding. false to disable + size: 0, // maximum response body size in bytes. 0 to disable + agent: null, // http(s).Agent instance or function that returns an instance (see below) + highWaterMark: 16384, // the maximum number of bytes to store in the internal buffer before ceasing to read from the underlying resource. + insecureHTTPParser: false // Use an insecure HTTP parser that accepts invalid HTTP headers when `true`. +} +``` + +#### Default Headers + +If no values are set, the following request headers will be sent automatically: + +| Header | Value | +| ------------------- | ------------------------------------------------------ | +| `Accept-Encoding` | `gzip, deflate, br` (when `options.compress === true`) | +| `Accept` | `*/*` | +| `Content-Length` | _(automatically calculated, if possible)_ | +| `Host` | _(host and port information from the target URI)_ | +| `Transfer-Encoding` | `chunked` _(when `req.body` is a stream)_ | +| `User-Agent` | `node-fetch` | + + +Note: when `body` is a `Stream`, `Content-Length` is not set automatically. + +#### Custom Agent + +The `agent` option allows you to specify networking related options which are out of the scope of Fetch, including and not limited to the following: + +- Support self-signed certificate +- Use only IPv4 or IPv6 +- Custom DNS Lookup + +See [`http.Agent`](https://nodejs.org/api/http.html#http_new_agent_options) for more information. + +If no agent is specified, the default agent provided by Node.js is used. Note that [this changed in Node.js 19](https://github.com/nodejs/node/blob/4267b92604ad78584244488e7f7508a690cb80d0/lib/_http_agent.js#L564) to have `keepalive` true by default. If you wish to enable `keepalive` in an earlier version of Node.js, you can override the agent as per the following code sample. + +In addition, the `agent` option accepts a function that returns `http`(s)`.Agent` instance given current [URL](https://nodejs.org/api/url.html), this is useful during a redirection chain across HTTP and HTTPS protocol. + +```js +import http from 'node:http'; +import https from 'node:https'; + +const httpAgent = new http.Agent({ + keepAlive: true +}); +const httpsAgent = new https.Agent({ + keepAlive: true +}); + +const options = { + agent: function(_parsedURL) { + if (_parsedURL.protocol == 'http:') { + return httpAgent; + } else { + return httpsAgent; + } + } +}; +``` + + + +#### Custom highWaterMark + +Stream on Node.js have a smaller internal buffer size (16kB, aka `highWaterMark`) from client-side browsers (>1MB, not consistent across browsers). Because of that, when you are writing an isomorphic app and using `res.clone()`, it will hang with large response in Node. + +The recommended way to fix this problem is to resolve cloned response in parallel: + +```js +import fetch from 'node-fetch'; + +const response = await fetch('https://example.com'); +const r1 = response.clone(); + +const results = await Promise.all([response.json(), r1.text()]); + +console.log(results[0]); +console.log(results[1]); +``` + +If for some reason you don't like the solution above, since `3.x` you are able to modify the `highWaterMark` option: + +```js +import fetch from 'node-fetch'; + +const response = await fetch('https://example.com', { + // About 1MB + highWaterMark: 1024 * 1024 +}); + +const result = await res.clone().arrayBuffer(); +console.dir(result); +``` + +#### Insecure HTTP Parser + +Passed through to the `insecureHTTPParser` option on http(s).request. See [`http.request`](https://nodejs.org/api/http.html#http_http_request_url_options_callback) for more information. + +#### Manual Redirect + +The `redirect: 'manual'` option for node-fetch is different from the browser & specification, which +results in an [opaque-redirect filtered response](https://fetch.spec.whatwg.org/#concept-filtered-response-opaque-redirect). +node-fetch gives you the typical [basic filtered response](https://fetch.spec.whatwg.org/#concept-filtered-response-basic) instead. + +```js +import fetch from 'node-fetch'; + +const response = await fetch('https://httpbin.org/status/301', { redirect: 'manual' }); + +if (response.status === 301 || response.status === 302) { + const locationURL = new URL(response.headers.get('location'), response.url); + const response2 = await fetch(locationURL, { redirect: 'manual' }); + console.dir(response2); +} +``` + + + +### Class: Request + +An HTTP(S) request containing information about URL, method, headers, and the body. This class implements the [Body](#iface-body) interface. + +Due to the nature of Node.js, the following properties are not implemented at this moment: + +- `type` +- `destination` +- `mode` +- `credentials` +- `cache` +- `integrity` +- `keepalive` + +The following node-fetch extension properties are provided: + +- `follow` +- `compress` +- `counter` +- `agent` +- `highWaterMark` + +See [options](#fetch-options) for exact meaning of these extensions. + +#### new Request(input[, options]) + +_(spec-compliant)_ + +- `input` A string representing a URL, or another `Request` (which will be cloned) +- `options` [Options](#fetch-options) for the HTTP(S) request + +Constructs a new `Request` object. The constructor is identical to that in the [browser](https://developer.mozilla.org/en-US/docs/Web/API/Request/Request). + +In most cases, directly `fetch(url, options)` is simpler than creating a `Request` object. + + + +### Class: Response + +An HTTP(S) response. This class implements the [Body](#iface-body) interface. + +The following properties are not implemented in node-fetch at this moment: + +- `trailer` + +#### new Response([body[, options]]) + +_(spec-compliant)_ + +- `body` A `String` or [`Readable` stream][node-readable] +- `options` A [`ResponseInit`][response-init] options dictionary + +Constructs a new `Response` object. The constructor is identical to that in the [browser](https://developer.mozilla.org/en-US/docs/Web/API/Response/Response). + +Because Node.js does not implement service workers (for which this class was designed), one rarely has to construct a `Response` directly. + +#### response.ok + +_(spec-compliant)_ + +Convenience property representing if the request ended normally. Will evaluate to true if the response status was greater than or equal to 200 but smaller than 300. + +#### response.redirected + +_(spec-compliant)_ + +Convenience property representing if the request has been redirected at least once. Will evaluate to true if the internal redirect counter is greater than 0. + +#### response.type + +_(deviation from spec)_ + +Convenience property representing the response's type. node-fetch only supports `'default'` and `'error'` and does not make use of [filtered responses](https://fetch.spec.whatwg.org/#concept-filtered-response). + + + +### Class: Headers + +This class allows manipulating and iterating over a set of HTTP headers. All methods specified in the [Fetch Standard][whatwg-fetch] are implemented. + +#### new Headers([init]) + +_(spec-compliant)_ + +- `init` Optional argument to pre-fill the `Headers` object + +Construct a new `Headers` object. `init` can be either `null`, a `Headers` object, an key-value map object or any iterable object. + +```js +// Example adapted from https://fetch.spec.whatwg.org/#example-headers-class +import {Headers} from 'node-fetch'; + +const meta = { + 'Content-Type': 'text/xml' +}; +const headers = new Headers(meta); + +// The above is equivalent to +const meta = [['Content-Type', 'text/xml']]; +const headers = new Headers(meta); + +// You can in fact use any iterable objects, like a Map or even another Headers +const meta = new Map(); +meta.set('Content-Type', 'text/xml'); +const headers = new Headers(meta); +const copyOfHeaders = new Headers(headers); +``` + + + +### Interface: Body + +`Body` is an abstract interface with methods that are applicable to both `Request` and `Response` classes. + +#### body.body + +_(deviation from spec)_ + +- Node.js [`Readable` stream][node-readable] + +Data are encapsulated in the `Body` object. Note that while the [Fetch Standard][whatwg-fetch] requires the property to always be a WHATWG `ReadableStream`, in node-fetch it is a Node.js [`Readable` stream][node-readable]. + +#### body.bodyUsed + +_(spec-compliant)_ + +- `Boolean` + +A boolean property for if this body has been consumed. Per the specs, a consumed body cannot be used again. + +#### body.arrayBuffer() + +#### body.formData() + +#### body.blob() + +#### body.json() + +#### body.text() + +`fetch` comes with methods to parse `multipart/form-data` payloads as well as +`x-www-form-urlencoded` bodies using `.formData()` this comes from the idea that +Service Worker can intercept such messages before it's sent to the server to +alter them. This is useful for anybody building a server so you can use it to +parse & consume payloads. + +
+Code example + +```js +import http from 'node:http' +import { Response } from 'node-fetch' + +http.createServer(async function (req, res) { + const formData = await new Response(req, { + headers: req.headers // Pass along the boundary value + }).formData() + const allFields = [...formData] + + const file = formData.get('uploaded-files') + const arrayBuffer = await file.arrayBuffer() + const text = await file.text() + const whatwgReadableStream = file.stream() + + // other was to consume the request could be to do: + const json = await new Response(req).json() + const text = await new Response(req).text() + const arrayBuffer = await new Response(req).arrayBuffer() + const blob = await new Response(req, { + headers: req.headers // So that `type` inherits `Content-Type` + }.blob() +}) +``` + +
+ + + +### Class: FetchError + +_(node-fetch extension)_ + +An operational error in the fetching process. See [ERROR-HANDLING.md][] for more info. + + + +### Class: AbortError + +_(node-fetch extension)_ + +An Error thrown when the request is aborted in response to an `AbortSignal`'s `abort` event. It has a `name` property of `AbortError`. See [ERROR-HANDLING.MD][] for more info. + +## TypeScript + +**Since `3.x` types are bundled with `node-fetch`, so you don't need to install any additional packages.** + +For older versions please use the type definitions from [DefinitelyTyped](https://github.com/DefinitelyTyped/DefinitelyTyped): + +```sh +npm install --save-dev @types/node-fetch@2.x +``` + +## Acknowledgement + +Thanks to [github/fetch](https://github.com/github/fetch) for providing a solid implementation reference. + +## Team + +| [![David Frank](https://github.com/bitinn.png?size=100)](https://github.com/bitinn) | [![Jimmy Wärting](https://github.com/jimmywarting.png?size=100)](https://github.com/jimmywarting) | [![Antoni Kepinski](https://github.com/xxczaki.png?size=100)](https://github.com/xxczaki) | [![Richie Bendall](https://github.com/Richienb.png?size=100)](https://github.com/Richienb) | [![Gregor Martynus](https://github.com/gr2m.png?size=100)](https://github.com/gr2m) | +| ----------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------------- | +| [David Frank](https://bitinn.net/) | [Jimmy Wärting](https://jimmy.warting.se/) | [Antoni Kepinski](https://kepinski.ch) | [Richie Bendall](https://www.richie-bendall.ml/) | [Gregor Martynus](https://twitter.com/gr2m) | + +###### Former + +- [Timothy Gu](https://github.com/timothygu) +- [Jared Kantrowitz](https://github.com/jkantr) + +## License + +[MIT](LICENSE.md) + +[whatwg-fetch]: https://fetch.spec.whatwg.org/ +[response-init]: https://fetch.spec.whatwg.org/#responseinit +[node-readable]: https://nodejs.org/api/stream.html#stream_readable_streams +[mdn-headers]: https://developer.mozilla.org/en-US/docs/Web/API/Headers +[error-handling.md]: https://github.com/node-fetch/node-fetch/blob/master/docs/ERROR-HANDLING.md +[FormData]: https://developer.mozilla.org/en-US/docs/Web/API/FormData +[Blob]: https://developer.mozilla.org/en-US/docs/Web/API/Blob +[File]: https://developer.mozilla.org/en-US/docs/Web/API/File diff --git a/node_modules/node-fetch/package.json b/node_modules/node-fetch/package.json new file mode 100644 index 00000000..2b4e8583 --- /dev/null +++ b/node_modules/node-fetch/package.json @@ -0,0 +1,131 @@ +{ + "name": "node-fetch", + "version": "3.3.2", + "description": "A light-weight module that brings Fetch API to node.js", + "main": "./src/index.js", + "sideEffects": false, + "type": "module", + "files": [ + "src", + "@types/index.d.ts" + ], + "types": "./@types/index.d.ts", + "engines": { + "node": "^12.20.0 || ^14.13.1 || >=16.0.0" + }, + "scripts": { + "test": "mocha", + "coverage": "c8 report --reporter=text-lcov | coveralls", + "test-types": "tsd", + "lint": "xo" + }, + "repository": { + "type": "git", + "url": "https://github.com/node-fetch/node-fetch.git" + }, + "keywords": [ + "fetch", + "http", + "promise", + "request", + "curl", + "wget", + "xhr", + "whatwg" + ], + "author": "David Frank", + "license": "MIT", + "bugs": { + "url": "https://github.com/node-fetch/node-fetch/issues" + }, + "homepage": "https://github.com/node-fetch/node-fetch", + "funding": { + "type": "opencollective", + "url": "https://opencollective.com/node-fetch" + }, + "devDependencies": { + "abort-controller": "^3.0.0", + "abortcontroller-polyfill": "^1.7.1", + "busboy": "^1.4.0", + "c8": "^7.7.2", + "chai": "^4.3.4", + "chai-as-promised": "^7.1.1", + "chai-iterator": "^3.0.2", + "chai-string": "^1.5.0", + "coveralls": "^3.1.0", + "form-data": "^4.0.0", + "formdata-node": "^4.2.4", + "mocha": "^9.1.3", + "p-timeout": "^5.0.0", + "stream-consumers": "^1.0.1", + "tsd": "^0.14.0", + "xo": "^0.39.1" + }, + "dependencies": { + "data-uri-to-buffer": "^4.0.0", + "fetch-blob": "^3.1.4", + "formdata-polyfill": "^4.0.10" + }, + "tsd": { + "cwd": "@types", + "compilerOptions": { + "esModuleInterop": true + } + }, + "xo": { + "envs": [ + "node", + "browser" + ], + "ignores": [ + "example.js" + ], + "rules": { + "complexity": 0, + "import/extensions": 0, + "import/no-useless-path-segments": 0, + "import/no-anonymous-default-export": 0, + "import/no-named-as-default": 0, + "unicorn/import-index": 0, + "unicorn/no-array-reduce": 0, + "unicorn/prefer-node-protocol": 0, + "unicorn/numeric-separators-style": 0, + "unicorn/explicit-length-check": 0, + "capitalized-comments": 0, + "node/no-unsupported-features/es-syntax": 0, + "@typescript-eslint/member-ordering": 0 + }, + "overrides": [ + { + "files": "test/**/*.js", + "envs": [ + "node", + "mocha" + ], + "rules": { + "max-nested-callbacks": 0, + "no-unused-expressions": 0, + "no-warning-comments": 0, + "new-cap": 0, + "guard-for-in": 0, + "unicorn/no-array-for-each": 0, + "unicorn/prevent-abbreviations": 0, + "promise/prefer-await-to-then": 0, + "ava/no-import-test-files": 0 + } + } + ] + }, + "runkitExampleFilename": "example.js", + "release": { + "branches": [ + "+([0-9]).x", + "main", + "next", + { + "name": "beta", + "prerelease": true + } + ] + } +} diff --git a/node_modules/node-fetch/src/body.js b/node_modules/node-fetch/src/body.js new file mode 100644 index 00000000..714e27ec --- /dev/null +++ b/node_modules/node-fetch/src/body.js @@ -0,0 +1,397 @@ + +/** + * Body.js + * + * Body interface provides common methods for Request and Response + */ + +import Stream, {PassThrough} from 'node:stream'; +import {types, deprecate, promisify} from 'node:util'; +import {Buffer} from 'node:buffer'; + +import Blob from 'fetch-blob'; +import {FormData, formDataToBlob} from 'formdata-polyfill/esm.min.js'; + +import {FetchError} from './errors/fetch-error.js'; +import {FetchBaseError} from './errors/base.js'; +import {isBlob, isURLSearchParameters} from './utils/is.js'; + +const pipeline = promisify(Stream.pipeline); +const INTERNALS = Symbol('Body internals'); + +/** + * Body mixin + * + * Ref: https://fetch.spec.whatwg.org/#body + * + * @param Stream body Readable stream + * @param Object opts Response options + * @return Void + */ +export default class Body { + constructor(body, { + size = 0 + } = {}) { + let boundary = null; + + if (body === null) { + // Body is undefined or null + body = null; + } else if (isURLSearchParameters(body)) { + // Body is a URLSearchParams + body = Buffer.from(body.toString()); + } else if (isBlob(body)) { + // Body is blob + } else if (Buffer.isBuffer(body)) { + // Body is Buffer + } else if (types.isAnyArrayBuffer(body)) { + // Body is ArrayBuffer + body = Buffer.from(body); + } else if (ArrayBuffer.isView(body)) { + // Body is ArrayBufferView + body = Buffer.from(body.buffer, body.byteOffset, body.byteLength); + } else if (body instanceof Stream) { + // Body is stream + } else if (body instanceof FormData) { + // Body is FormData + body = formDataToBlob(body); + boundary = body.type.split('=')[1]; + } else { + // None of the above + // coerce to string then buffer + body = Buffer.from(String(body)); + } + + let stream = body; + + if (Buffer.isBuffer(body)) { + stream = Stream.Readable.from(body); + } else if (isBlob(body)) { + stream = Stream.Readable.from(body.stream()); + } + + this[INTERNALS] = { + body, + stream, + boundary, + disturbed: false, + error: null + }; + this.size = size; + + if (body instanceof Stream) { + body.on('error', error_ => { + const error = error_ instanceof FetchBaseError ? + error_ : + new FetchError(`Invalid response body while trying to fetch ${this.url}: ${error_.message}`, 'system', error_); + this[INTERNALS].error = error; + }); + } + } + + get body() { + return this[INTERNALS].stream; + } + + get bodyUsed() { + return this[INTERNALS].disturbed; + } + + /** + * Decode response as ArrayBuffer + * + * @return Promise + */ + async arrayBuffer() { + const {buffer, byteOffset, byteLength} = await consumeBody(this); + return buffer.slice(byteOffset, byteOffset + byteLength); + } + + async formData() { + const ct = this.headers.get('content-type'); + + if (ct.startsWith('application/x-www-form-urlencoded')) { + const formData = new FormData(); + const parameters = new URLSearchParams(await this.text()); + + for (const [name, value] of parameters) { + formData.append(name, value); + } + + return formData; + } + + const {toFormData} = await import('./utils/multipart-parser.js'); + return toFormData(this.body, ct); + } + + /** + * Return raw response as Blob + * + * @return Promise + */ + async blob() { + const ct = (this.headers && this.headers.get('content-type')) || (this[INTERNALS].body && this[INTERNALS].body.type) || ''; + const buf = await this.arrayBuffer(); + + return new Blob([buf], { + type: ct + }); + } + + /** + * Decode response as json + * + * @return Promise + */ + async json() { + const text = await this.text(); + return JSON.parse(text); + } + + /** + * Decode response as text + * + * @return Promise + */ + async text() { + const buffer = await consumeBody(this); + return new TextDecoder().decode(buffer); + } + + /** + * Decode response as buffer (non-spec api) + * + * @return Promise + */ + buffer() { + return consumeBody(this); + } +} + +Body.prototype.buffer = deprecate(Body.prototype.buffer, 'Please use \'response.arrayBuffer()\' instead of \'response.buffer()\'', 'node-fetch#buffer'); + +// In browsers, all properties are enumerable. +Object.defineProperties(Body.prototype, { + body: {enumerable: true}, + bodyUsed: {enumerable: true}, + arrayBuffer: {enumerable: true}, + blob: {enumerable: true}, + json: {enumerable: true}, + text: {enumerable: true}, + data: {get: deprecate(() => {}, + 'data doesn\'t exist, use json(), text(), arrayBuffer(), or body instead', + 'https://github.com/node-fetch/node-fetch/issues/1000 (response)')} +}); + +/** + * Consume and convert an entire Body to a Buffer. + * + * Ref: https://fetch.spec.whatwg.org/#concept-body-consume-body + * + * @return Promise + */ +async function consumeBody(data) { + if (data[INTERNALS].disturbed) { + throw new TypeError(`body used already for: ${data.url}`); + } + + data[INTERNALS].disturbed = true; + + if (data[INTERNALS].error) { + throw data[INTERNALS].error; + } + + const {body} = data; + + // Body is null + if (body === null) { + return Buffer.alloc(0); + } + + /* c8 ignore next 3 */ + if (!(body instanceof Stream)) { + return Buffer.alloc(0); + } + + // Body is stream + // get ready to actually consume the body + const accum = []; + let accumBytes = 0; + + try { + for await (const chunk of body) { + if (data.size > 0 && accumBytes + chunk.length > data.size) { + const error = new FetchError(`content size at ${data.url} over limit: ${data.size}`, 'max-size'); + body.destroy(error); + throw error; + } + + accumBytes += chunk.length; + accum.push(chunk); + } + } catch (error) { + const error_ = error instanceof FetchBaseError ? error : new FetchError(`Invalid response body while trying to fetch ${data.url}: ${error.message}`, 'system', error); + throw error_; + } + + if (body.readableEnded === true || body._readableState.ended === true) { + try { + if (accum.every(c => typeof c === 'string')) { + return Buffer.from(accum.join('')); + } + + return Buffer.concat(accum, accumBytes); + } catch (error) { + throw new FetchError(`Could not create Buffer from response body for ${data.url}: ${error.message}`, 'system', error); + } + } else { + throw new FetchError(`Premature close of server response while trying to fetch ${data.url}`); + } +} + +/** + * Clone body given Res/Req instance + * + * @param Mixed instance Response or Request instance + * @param String highWaterMark highWaterMark for both PassThrough body streams + * @return Mixed + */ +export const clone = (instance, highWaterMark) => { + let p1; + let p2; + let {body} = instance[INTERNALS]; + + // Don't allow cloning a used body + if (instance.bodyUsed) { + throw new Error('cannot clone body after it is used'); + } + + // Check that body is a stream and not form-data object + // note: we can't clone the form-data object without having it as a dependency + if ((body instanceof Stream) && (typeof body.getBoundary !== 'function')) { + // Tee instance body + p1 = new PassThrough({highWaterMark}); + p2 = new PassThrough({highWaterMark}); + body.pipe(p1); + body.pipe(p2); + // Set instance body to teed body and return the other teed body + instance[INTERNALS].stream = p1; + body = p2; + } + + return body; +}; + +const getNonSpecFormDataBoundary = deprecate( + body => body.getBoundary(), + 'form-data doesn\'t follow the spec and requires special treatment. Use alternative package', + 'https://github.com/node-fetch/node-fetch/issues/1167' +); + +/** + * Performs the operation "extract a `Content-Type` value from |object|" as + * specified in the specification: + * https://fetch.spec.whatwg.org/#concept-bodyinit-extract + * + * This function assumes that instance.body is present. + * + * @param {any} body Any options.body input + * @returns {string | null} + */ +export const extractContentType = (body, request) => { + // Body is null or undefined + if (body === null) { + return null; + } + + // Body is string + if (typeof body === 'string') { + return 'text/plain;charset=UTF-8'; + } + + // Body is a URLSearchParams + if (isURLSearchParameters(body)) { + return 'application/x-www-form-urlencoded;charset=UTF-8'; + } + + // Body is blob + if (isBlob(body)) { + return body.type || null; + } + + // Body is a Buffer (Buffer, ArrayBuffer or ArrayBufferView) + if (Buffer.isBuffer(body) || types.isAnyArrayBuffer(body) || ArrayBuffer.isView(body)) { + return null; + } + + if (body instanceof FormData) { + return `multipart/form-data; boundary=${request[INTERNALS].boundary}`; + } + + // Detect form data input from form-data module + if (body && typeof body.getBoundary === 'function') { + return `multipart/form-data;boundary=${getNonSpecFormDataBoundary(body)}`; + } + + // Body is stream - can't really do much about this + if (body instanceof Stream) { + return null; + } + + // Body constructor defaults other things to string + return 'text/plain;charset=UTF-8'; +}; + +/** + * The Fetch Standard treats this as if "total bytes" is a property on the body. + * For us, we have to explicitly get it with a function. + * + * ref: https://fetch.spec.whatwg.org/#concept-body-total-bytes + * + * @param {any} obj.body Body object from the Body instance. + * @returns {number | null} + */ +export const getTotalBytes = request => { + const {body} = request[INTERNALS]; + + // Body is null or undefined + if (body === null) { + return 0; + } + + // Body is Blob + if (isBlob(body)) { + return body.size; + } + + // Body is Buffer + if (Buffer.isBuffer(body)) { + return body.length; + } + + // Detect form data input from form-data module + if (body && typeof body.getLengthSync === 'function') { + return body.hasKnownLength && body.hasKnownLength() ? body.getLengthSync() : null; + } + + // Body is stream + return null; +}; + +/** + * Write a Body to a Node.js WritableStream (e.g. http.Request) object. + * + * @param {Stream.Writable} dest The stream to write to. + * @param obj.body Body object from the Body instance. + * @returns {Promise} + */ +export const writeToStream = async (dest, {body}) => { + if (body === null) { + // Body is null + dest.end(); + } else { + // Body is stream + await pipeline(body, dest); + } +}; diff --git a/node_modules/node-fetch/src/errors/abort-error.js b/node_modules/node-fetch/src/errors/abort-error.js new file mode 100644 index 00000000..0b62f1cd --- /dev/null +++ b/node_modules/node-fetch/src/errors/abort-error.js @@ -0,0 +1,10 @@ +import {FetchBaseError} from './base.js'; + +/** + * AbortError interface for cancelled requests + */ +export class AbortError extends FetchBaseError { + constructor(message, type = 'aborted') { + super(message, type); + } +} diff --git a/node_modules/node-fetch/src/errors/base.js b/node_modules/node-fetch/src/errors/base.js new file mode 100644 index 00000000..4e66e1bf --- /dev/null +++ b/node_modules/node-fetch/src/errors/base.js @@ -0,0 +1,17 @@ +export class FetchBaseError extends Error { + constructor(message, type) { + super(message); + // Hide custom error implementation details from end-users + Error.captureStackTrace(this, this.constructor); + + this.type = type; + } + + get name() { + return this.constructor.name; + } + + get [Symbol.toStringTag]() { + return this.constructor.name; + } +} diff --git a/node_modules/node-fetch/src/errors/fetch-error.js b/node_modules/node-fetch/src/errors/fetch-error.js new file mode 100644 index 00000000..f7ae5cc4 --- /dev/null +++ b/node_modules/node-fetch/src/errors/fetch-error.js @@ -0,0 +1,26 @@ + +import {FetchBaseError} from './base.js'; + +/** + * @typedef {{ address?: string, code: string, dest?: string, errno: number, info?: object, message: string, path?: string, port?: number, syscall: string}} SystemError +*/ + +/** + * FetchError interface for operational errors + */ +export class FetchError extends FetchBaseError { + /** + * @param {string} message - Error message for human + * @param {string} [type] - Error type for machine + * @param {SystemError} [systemError] - For Node.js system error + */ + constructor(message, type, systemError) { + super(message, type); + // When err.type is `system`, err.erroredSysCall contains system error and err.code contains system error code + if (systemError) { + // eslint-disable-next-line no-multi-assign + this.code = this.errno = systemError.code; + this.erroredSysCall = systemError.syscall; + } + } +} diff --git a/node_modules/node-fetch/src/headers.js b/node_modules/node-fetch/src/headers.js new file mode 100644 index 00000000..cd694558 --- /dev/null +++ b/node_modules/node-fetch/src/headers.js @@ -0,0 +1,267 @@ +/** + * Headers.js + * + * Headers class offers convenient helpers + */ + +import {types} from 'node:util'; +import http from 'node:http'; + +/* c8 ignore next 9 */ +const validateHeaderName = typeof http.validateHeaderName === 'function' ? + http.validateHeaderName : + name => { + if (!/^[\^`\-\w!#$%&'*+.|~]+$/.test(name)) { + const error = new TypeError(`Header name must be a valid HTTP token [${name}]`); + Object.defineProperty(error, 'code', {value: 'ERR_INVALID_HTTP_TOKEN'}); + throw error; + } + }; + +/* c8 ignore next 9 */ +const validateHeaderValue = typeof http.validateHeaderValue === 'function' ? + http.validateHeaderValue : + (name, value) => { + if (/[^\t\u0020-\u007E\u0080-\u00FF]/.test(value)) { + const error = new TypeError(`Invalid character in header content ["${name}"]`); + Object.defineProperty(error, 'code', {value: 'ERR_INVALID_CHAR'}); + throw error; + } + }; + +/** + * @typedef {Headers | Record | Iterable | Iterable>} HeadersInit + */ + +/** + * This Fetch API interface allows you to perform various actions on HTTP request and response headers. + * These actions include retrieving, setting, adding to, and removing. + * A Headers object has an associated header list, which is initially empty and consists of zero or more name and value pairs. + * You can add to this using methods like append() (see Examples.) + * In all methods of this interface, header names are matched by case-insensitive byte sequence. + * + */ +export default class Headers extends URLSearchParams { + /** + * Headers class + * + * @constructor + * @param {HeadersInit} [init] - Response headers + */ + constructor(init) { + // Validate and normalize init object in [name, value(s)][] + /** @type {string[][]} */ + let result = []; + if (init instanceof Headers) { + const raw = init.raw(); + for (const [name, values] of Object.entries(raw)) { + result.push(...values.map(value => [name, value])); + } + } else if (init == null) { // eslint-disable-line no-eq-null, eqeqeq + // No op + } else if (typeof init === 'object' && !types.isBoxedPrimitive(init)) { + const method = init[Symbol.iterator]; + // eslint-disable-next-line no-eq-null, eqeqeq + if (method == null) { + // Record + result.push(...Object.entries(init)); + } else { + if (typeof method !== 'function') { + throw new TypeError('Header pairs must be iterable'); + } + + // Sequence> + // Note: per spec we have to first exhaust the lists then process them + result = [...init] + .map(pair => { + if ( + typeof pair !== 'object' || types.isBoxedPrimitive(pair) + ) { + throw new TypeError('Each header pair must be an iterable object'); + } + + return [...pair]; + }).map(pair => { + if (pair.length !== 2) { + throw new TypeError('Each header pair must be a name/value tuple'); + } + + return [...pair]; + }); + } + } else { + throw new TypeError('Failed to construct \'Headers\': The provided value is not of type \'(sequence> or record)'); + } + + // Validate and lowercase + result = + result.length > 0 ? + result.map(([name, value]) => { + validateHeaderName(name); + validateHeaderValue(name, String(value)); + return [String(name).toLowerCase(), String(value)]; + }) : + undefined; + + super(result); + + // Returning a Proxy that will lowercase key names, validate parameters and sort keys + // eslint-disable-next-line no-constructor-return + return new Proxy(this, { + get(target, p, receiver) { + switch (p) { + case 'append': + case 'set': + return (name, value) => { + validateHeaderName(name); + validateHeaderValue(name, String(value)); + return URLSearchParams.prototype[p].call( + target, + String(name).toLowerCase(), + String(value) + ); + }; + + case 'delete': + case 'has': + case 'getAll': + return name => { + validateHeaderName(name); + return URLSearchParams.prototype[p].call( + target, + String(name).toLowerCase() + ); + }; + + case 'keys': + return () => { + target.sort(); + return new Set(URLSearchParams.prototype.keys.call(target)).keys(); + }; + + default: + return Reflect.get(target, p, receiver); + } + } + }); + /* c8 ignore next */ + } + + get [Symbol.toStringTag]() { + return this.constructor.name; + } + + toString() { + return Object.prototype.toString.call(this); + } + + get(name) { + const values = this.getAll(name); + if (values.length === 0) { + return null; + } + + let value = values.join(', '); + if (/^content-encoding$/i.test(name)) { + value = value.toLowerCase(); + } + + return value; + } + + forEach(callback, thisArg = undefined) { + for (const name of this.keys()) { + Reflect.apply(callback, thisArg, [this.get(name), name, this]); + } + } + + * values() { + for (const name of this.keys()) { + yield this.get(name); + } + } + + /** + * @type {() => IterableIterator<[string, string]>} + */ + * entries() { + for (const name of this.keys()) { + yield [name, this.get(name)]; + } + } + + [Symbol.iterator]() { + return this.entries(); + } + + /** + * Node-fetch non-spec method + * returning all headers and their values as array + * @returns {Record} + */ + raw() { + return [...this.keys()].reduce((result, key) => { + result[key] = this.getAll(key); + return result; + }, {}); + } + + /** + * For better console.log(headers) and also to convert Headers into Node.js Request compatible format + */ + [Symbol.for('nodejs.util.inspect.custom')]() { + return [...this.keys()].reduce((result, key) => { + const values = this.getAll(key); + // Http.request() only supports string as Host header. + // This hack makes specifying custom Host header possible. + if (key === 'host') { + result[key] = values[0]; + } else { + result[key] = values.length > 1 ? values : values[0]; + } + + return result; + }, {}); + } +} + +/** + * Re-shaping object for Web IDL tests + * Only need to do it for overridden methods + */ +Object.defineProperties( + Headers.prototype, + ['get', 'entries', 'forEach', 'values'].reduce((result, property) => { + result[property] = {enumerable: true}; + return result; + }, {}) +); + +/** + * Create a Headers object from an http.IncomingMessage.rawHeaders, ignoring those that do + * not conform to HTTP grammar productions. + * @param {import('http').IncomingMessage['rawHeaders']} headers + */ +export function fromRawHeaders(headers = []) { + return new Headers( + headers + // Split into pairs + .reduce((result, value, index, array) => { + if (index % 2 === 0) { + result.push(array.slice(index, index + 2)); + } + + return result; + }, []) + .filter(([name, value]) => { + try { + validateHeaderName(name); + validateHeaderValue(name, String(value)); + return true; + } catch { + return false; + } + }) + + ); +} diff --git a/node_modules/node-fetch/src/index.js b/node_modules/node-fetch/src/index.js new file mode 100644 index 00000000..7c4aee87 --- /dev/null +++ b/node_modules/node-fetch/src/index.js @@ -0,0 +1,417 @@ +/** + * Index.js + * + * a request API compatible with window.fetch + * + * All spec algorithm step numbers are based on https://fetch.spec.whatwg.org/commit-snapshots/ae716822cb3a61843226cd090eefc6589446c1d2/. + */ + +import http from 'node:http'; +import https from 'node:https'; +import zlib from 'node:zlib'; +import Stream, {PassThrough, pipeline as pump} from 'node:stream'; +import {Buffer} from 'node:buffer'; + +import dataUriToBuffer from 'data-uri-to-buffer'; + +import {writeToStream, clone} from './body.js'; +import Response from './response.js'; +import Headers, {fromRawHeaders} from './headers.js'; +import Request, {getNodeRequestOptions} from './request.js'; +import {FetchError} from './errors/fetch-error.js'; +import {AbortError} from './errors/abort-error.js'; +import {isRedirect} from './utils/is-redirect.js'; +import {FormData} from 'formdata-polyfill/esm.min.js'; +import {isDomainOrSubdomain, isSameProtocol} from './utils/is.js'; +import {parseReferrerPolicyFromHeader} from './utils/referrer.js'; +import { + Blob, + File, + fileFromSync, + fileFrom, + blobFromSync, + blobFrom +} from 'fetch-blob/from.js'; + +export {FormData, Headers, Request, Response, FetchError, AbortError, isRedirect}; +export {Blob, File, fileFromSync, fileFrom, blobFromSync, blobFrom}; + +const supportedSchemas = new Set(['data:', 'http:', 'https:']); + +/** + * Fetch function + * + * @param {string | URL | import('./request').default} url - Absolute url or Request instance + * @param {*} [options_] - Fetch options + * @return {Promise} + */ +export default async function fetch(url, options_) { + return new Promise((resolve, reject) => { + // Build request object + const request = new Request(url, options_); + const {parsedURL, options} = getNodeRequestOptions(request); + if (!supportedSchemas.has(parsedURL.protocol)) { + throw new TypeError(`node-fetch cannot load ${url}. URL scheme "${parsedURL.protocol.replace(/:$/, '')}" is not supported.`); + } + + if (parsedURL.protocol === 'data:') { + const data = dataUriToBuffer(request.url); + const response = new Response(data, {headers: {'Content-Type': data.typeFull}}); + resolve(response); + return; + } + + // Wrap http.request into fetch + const send = (parsedURL.protocol === 'https:' ? https : http).request; + const {signal} = request; + let response = null; + + const abort = () => { + const error = new AbortError('The operation was aborted.'); + reject(error); + if (request.body && request.body instanceof Stream.Readable) { + request.body.destroy(error); + } + + if (!response || !response.body) { + return; + } + + response.body.emit('error', error); + }; + + if (signal && signal.aborted) { + abort(); + return; + } + + const abortAndFinalize = () => { + abort(); + finalize(); + }; + + // Send request + const request_ = send(parsedURL.toString(), options); + + if (signal) { + signal.addEventListener('abort', abortAndFinalize); + } + + const finalize = () => { + request_.abort(); + if (signal) { + signal.removeEventListener('abort', abortAndFinalize); + } + }; + + request_.on('error', error => { + reject(new FetchError(`request to ${request.url} failed, reason: ${error.message}`, 'system', error)); + finalize(); + }); + + fixResponseChunkedTransferBadEnding(request_, error => { + if (response && response.body) { + response.body.destroy(error); + } + }); + + /* c8 ignore next 18 */ + if (process.version < 'v14') { + // Before Node.js 14, pipeline() does not fully support async iterators and does not always + // properly handle when the socket close/end events are out of order. + request_.on('socket', s => { + let endedWithEventsCount; + s.prependListener('end', () => { + endedWithEventsCount = s._eventsCount; + }); + s.prependListener('close', hadError => { + // if end happened before close but the socket didn't emit an error, do it now + if (response && endedWithEventsCount < s._eventsCount && !hadError) { + const error = new Error('Premature close'); + error.code = 'ERR_STREAM_PREMATURE_CLOSE'; + response.body.emit('error', error); + } + }); + }); + } + + request_.on('response', response_ => { + request_.setTimeout(0); + const headers = fromRawHeaders(response_.rawHeaders); + + // HTTP fetch step 5 + if (isRedirect(response_.statusCode)) { + // HTTP fetch step 5.2 + const location = headers.get('Location'); + + // HTTP fetch step 5.3 + let locationURL = null; + try { + locationURL = location === null ? null : new URL(location, request.url); + } catch { + // error here can only be invalid URL in Location: header + // do not throw when options.redirect == manual + // let the user extract the errorneous redirect URL + if (request.redirect !== 'manual') { + reject(new FetchError(`uri requested responds with an invalid redirect URL: ${location}`, 'invalid-redirect')); + finalize(); + return; + } + } + + // HTTP fetch step 5.5 + switch (request.redirect) { + case 'error': + reject(new FetchError(`uri requested responds with a redirect, redirect mode is set to error: ${request.url}`, 'no-redirect')); + finalize(); + return; + case 'manual': + // Nothing to do + break; + case 'follow': { + // HTTP-redirect fetch step 2 + if (locationURL === null) { + break; + } + + // HTTP-redirect fetch step 5 + if (request.counter >= request.follow) { + reject(new FetchError(`maximum redirect reached at: ${request.url}`, 'max-redirect')); + finalize(); + return; + } + + // HTTP-redirect fetch step 6 (counter increment) + // Create a new Request object. + const requestOptions = { + headers: new Headers(request.headers), + follow: request.follow, + counter: request.counter + 1, + agent: request.agent, + compress: request.compress, + method: request.method, + body: clone(request), + signal: request.signal, + size: request.size, + referrer: request.referrer, + referrerPolicy: request.referrerPolicy + }; + + // when forwarding sensitive headers like "Authorization", + // "WWW-Authenticate", and "Cookie" to untrusted targets, + // headers will be ignored when following a redirect to a domain + // that is not a subdomain match or exact match of the initial domain. + // For example, a redirect from "foo.com" to either "foo.com" or "sub.foo.com" + // will forward the sensitive headers, but a redirect to "bar.com" will not. + // headers will also be ignored when following a redirect to a domain using + // a different protocol. For example, a redirect from "https://foo.com" to "http://foo.com" + // will not forward the sensitive headers + if (!isDomainOrSubdomain(request.url, locationURL) || !isSameProtocol(request.url, locationURL)) { + for (const name of ['authorization', 'www-authenticate', 'cookie', 'cookie2']) { + requestOptions.headers.delete(name); + } + } + + // HTTP-redirect fetch step 9 + if (response_.statusCode !== 303 && request.body && options_.body instanceof Stream.Readable) { + reject(new FetchError('Cannot follow redirect with body being a readable stream', 'unsupported-redirect')); + finalize(); + return; + } + + // HTTP-redirect fetch step 11 + if (response_.statusCode === 303 || ((response_.statusCode === 301 || response_.statusCode === 302) && request.method === 'POST')) { + requestOptions.method = 'GET'; + requestOptions.body = undefined; + requestOptions.headers.delete('content-length'); + } + + // HTTP-redirect fetch step 14 + const responseReferrerPolicy = parseReferrerPolicyFromHeader(headers); + if (responseReferrerPolicy) { + requestOptions.referrerPolicy = responseReferrerPolicy; + } + + // HTTP-redirect fetch step 15 + resolve(fetch(new Request(locationURL, requestOptions))); + finalize(); + return; + } + + default: + return reject(new TypeError(`Redirect option '${request.redirect}' is not a valid value of RequestRedirect`)); + } + } + + // Prepare response + if (signal) { + response_.once('end', () => { + signal.removeEventListener('abort', abortAndFinalize); + }); + } + + let body = pump(response_, new PassThrough(), error => { + if (error) { + reject(error); + } + }); + // see https://github.com/nodejs/node/pull/29376 + /* c8 ignore next 3 */ + if (process.version < 'v12.10') { + response_.on('aborted', abortAndFinalize); + } + + const responseOptions = { + url: request.url, + status: response_.statusCode, + statusText: response_.statusMessage, + headers, + size: request.size, + counter: request.counter, + highWaterMark: request.highWaterMark + }; + + // HTTP-network fetch step 12.1.1.3 + const codings = headers.get('Content-Encoding'); + + // HTTP-network fetch step 12.1.1.4: handle content codings + + // in following scenarios we ignore compression support + // 1. compression support is disabled + // 2. HEAD request + // 3. no Content-Encoding header + // 4. no content response (204) + // 5. content not modified response (304) + if (!request.compress || request.method === 'HEAD' || codings === null || response_.statusCode === 204 || response_.statusCode === 304) { + response = new Response(body, responseOptions); + resolve(response); + return; + } + + // For Node v6+ + // Be less strict when decoding compressed responses, since sometimes + // servers send slightly invalid responses that are still accepted + // by common browsers. + // Always using Z_SYNC_FLUSH is what cURL does. + const zlibOptions = { + flush: zlib.Z_SYNC_FLUSH, + finishFlush: zlib.Z_SYNC_FLUSH + }; + + // For gzip + if (codings === 'gzip' || codings === 'x-gzip') { + body = pump(body, zlib.createGunzip(zlibOptions), error => { + if (error) { + reject(error); + } + }); + response = new Response(body, responseOptions); + resolve(response); + return; + } + + // For deflate + if (codings === 'deflate' || codings === 'x-deflate') { + // Handle the infamous raw deflate response from old servers + // a hack for old IIS and Apache servers + const raw = pump(response_, new PassThrough(), error => { + if (error) { + reject(error); + } + }); + raw.once('data', chunk => { + // See http://stackoverflow.com/questions/37519828 + if ((chunk[0] & 0x0F) === 0x08) { + body = pump(body, zlib.createInflate(), error => { + if (error) { + reject(error); + } + }); + } else { + body = pump(body, zlib.createInflateRaw(), error => { + if (error) { + reject(error); + } + }); + } + + response = new Response(body, responseOptions); + resolve(response); + }); + raw.once('end', () => { + // Some old IIS servers return zero-length OK deflate responses, so + // 'data' is never emitted. See https://github.com/node-fetch/node-fetch/pull/903 + if (!response) { + response = new Response(body, responseOptions); + resolve(response); + } + }); + return; + } + + // For br + if (codings === 'br') { + body = pump(body, zlib.createBrotliDecompress(), error => { + if (error) { + reject(error); + } + }); + response = new Response(body, responseOptions); + resolve(response); + return; + } + + // Otherwise, use response as-is + response = new Response(body, responseOptions); + resolve(response); + }); + + // eslint-disable-next-line promise/prefer-await-to-then + writeToStream(request_, request).catch(reject); + }); +} + +function fixResponseChunkedTransferBadEnding(request, errorCallback) { + const LAST_CHUNK = Buffer.from('0\r\n\r\n'); + + let isChunkedTransfer = false; + let properLastChunkReceived = false; + let previousChunk; + + request.on('response', response => { + const {headers} = response; + isChunkedTransfer = headers['transfer-encoding'] === 'chunked' && !headers['content-length']; + }); + + request.on('socket', socket => { + const onSocketClose = () => { + if (isChunkedTransfer && !properLastChunkReceived) { + const error = new Error('Premature close'); + error.code = 'ERR_STREAM_PREMATURE_CLOSE'; + errorCallback(error); + } + }; + + const onData = buf => { + properLastChunkReceived = Buffer.compare(buf.slice(-5), LAST_CHUNK) === 0; + + // Sometimes final 0-length chunk and end of message code are in separate packets + if (!properLastChunkReceived && previousChunk) { + properLastChunkReceived = ( + Buffer.compare(previousChunk.slice(-3), LAST_CHUNK.slice(0, 3)) === 0 && + Buffer.compare(buf.slice(-2), LAST_CHUNK.slice(3)) === 0 + ); + } + + previousChunk = buf; + }; + + socket.prependListener('close', onSocketClose); + socket.on('data', onData); + + request.on('close', () => { + socket.removeListener('close', onSocketClose); + socket.removeListener('data', onData); + }); + }); +} diff --git a/node_modules/node-fetch/src/request.js b/node_modules/node-fetch/src/request.js new file mode 100644 index 00000000..af2ebc8e --- /dev/null +++ b/node_modules/node-fetch/src/request.js @@ -0,0 +1,313 @@ +/** + * Request.js + * + * Request class contains server only options + * + * All spec algorithm step numbers are based on https://fetch.spec.whatwg.org/commit-snapshots/ae716822cb3a61843226cd090eefc6589446c1d2/. + */ + +import {format as formatUrl} from 'node:url'; +import {deprecate} from 'node:util'; +import Headers from './headers.js'; +import Body, {clone, extractContentType, getTotalBytes} from './body.js'; +import {isAbortSignal} from './utils/is.js'; +import {getSearch} from './utils/get-search.js'; +import { + validateReferrerPolicy, determineRequestsReferrer, DEFAULT_REFERRER_POLICY +} from './utils/referrer.js'; + +const INTERNALS = Symbol('Request internals'); + +/** + * Check if `obj` is an instance of Request. + * + * @param {*} object + * @return {boolean} + */ +const isRequest = object => { + return ( + typeof object === 'object' && + typeof object[INTERNALS] === 'object' + ); +}; + +const doBadDataWarn = deprecate(() => {}, + '.data is not a valid RequestInit property, use .body instead', + 'https://github.com/node-fetch/node-fetch/issues/1000 (request)'); + +/** + * Request class + * + * Ref: https://fetch.spec.whatwg.org/#request-class + * + * @param Mixed input Url or Request instance + * @param Object init Custom options + * @return Void + */ +export default class Request extends Body { + constructor(input, init = {}) { + let parsedURL; + + // Normalize input and force URL to be encoded as UTF-8 (https://github.com/node-fetch/node-fetch/issues/245) + if (isRequest(input)) { + parsedURL = new URL(input.url); + } else { + parsedURL = new URL(input); + input = {}; + } + + if (parsedURL.username !== '' || parsedURL.password !== '') { + throw new TypeError(`${parsedURL} is an url with embedded credentials.`); + } + + let method = init.method || input.method || 'GET'; + if (/^(delete|get|head|options|post|put)$/i.test(method)) { + method = method.toUpperCase(); + } + + if (!isRequest(init) && 'data' in init) { + doBadDataWarn(); + } + + // eslint-disable-next-line no-eq-null, eqeqeq + if ((init.body != null || (isRequest(input) && input.body !== null)) && + (method === 'GET' || method === 'HEAD')) { + throw new TypeError('Request with GET/HEAD method cannot have body'); + } + + const inputBody = init.body ? + init.body : + (isRequest(input) && input.body !== null ? + clone(input) : + null); + + super(inputBody, { + size: init.size || input.size || 0 + }); + + const headers = new Headers(init.headers || input.headers || {}); + + if (inputBody !== null && !headers.has('Content-Type')) { + const contentType = extractContentType(inputBody, this); + if (contentType) { + headers.set('Content-Type', contentType); + } + } + + let signal = isRequest(input) ? + input.signal : + null; + if ('signal' in init) { + signal = init.signal; + } + + // eslint-disable-next-line no-eq-null, eqeqeq + if (signal != null && !isAbortSignal(signal)) { + throw new TypeError('Expected signal to be an instanceof AbortSignal or EventTarget'); + } + + // §5.4, Request constructor steps, step 15.1 + // eslint-disable-next-line no-eq-null, eqeqeq + let referrer = init.referrer == null ? input.referrer : init.referrer; + if (referrer === '') { + // §5.4, Request constructor steps, step 15.2 + referrer = 'no-referrer'; + } else if (referrer) { + // §5.4, Request constructor steps, step 15.3.1, 15.3.2 + const parsedReferrer = new URL(referrer); + // §5.4, Request constructor steps, step 15.3.3, 15.3.4 + referrer = /^about:(\/\/)?client$/.test(parsedReferrer) ? 'client' : parsedReferrer; + } else { + referrer = undefined; + } + + this[INTERNALS] = { + method, + redirect: init.redirect || input.redirect || 'follow', + headers, + parsedURL, + signal, + referrer + }; + + // Node-fetch-only options + this.follow = init.follow === undefined ? (input.follow === undefined ? 20 : input.follow) : init.follow; + this.compress = init.compress === undefined ? (input.compress === undefined ? true : input.compress) : init.compress; + this.counter = init.counter || input.counter || 0; + this.agent = init.agent || input.agent; + this.highWaterMark = init.highWaterMark || input.highWaterMark || 16384; + this.insecureHTTPParser = init.insecureHTTPParser || input.insecureHTTPParser || false; + + // §5.4, Request constructor steps, step 16. + // Default is empty string per https://fetch.spec.whatwg.org/#concept-request-referrer-policy + this.referrerPolicy = init.referrerPolicy || input.referrerPolicy || ''; + } + + /** @returns {string} */ + get method() { + return this[INTERNALS].method; + } + + /** @returns {string} */ + get url() { + return formatUrl(this[INTERNALS].parsedURL); + } + + /** @returns {Headers} */ + get headers() { + return this[INTERNALS].headers; + } + + get redirect() { + return this[INTERNALS].redirect; + } + + /** @returns {AbortSignal} */ + get signal() { + return this[INTERNALS].signal; + } + + // https://fetch.spec.whatwg.org/#dom-request-referrer + get referrer() { + if (this[INTERNALS].referrer === 'no-referrer') { + return ''; + } + + if (this[INTERNALS].referrer === 'client') { + return 'about:client'; + } + + if (this[INTERNALS].referrer) { + return this[INTERNALS].referrer.toString(); + } + + return undefined; + } + + get referrerPolicy() { + return this[INTERNALS].referrerPolicy; + } + + set referrerPolicy(referrerPolicy) { + this[INTERNALS].referrerPolicy = validateReferrerPolicy(referrerPolicy); + } + + /** + * Clone this request + * + * @return Request + */ + clone() { + return new Request(this); + } + + get [Symbol.toStringTag]() { + return 'Request'; + } +} + +Object.defineProperties(Request.prototype, { + method: {enumerable: true}, + url: {enumerable: true}, + headers: {enumerable: true}, + redirect: {enumerable: true}, + clone: {enumerable: true}, + signal: {enumerable: true}, + referrer: {enumerable: true}, + referrerPolicy: {enumerable: true} +}); + +/** + * Convert a Request to Node.js http request options. + * + * @param {Request} request - A Request instance + * @return The options object to be passed to http.request + */ +export const getNodeRequestOptions = request => { + const {parsedURL} = request[INTERNALS]; + const headers = new Headers(request[INTERNALS].headers); + + // Fetch step 1.3 + if (!headers.has('Accept')) { + headers.set('Accept', '*/*'); + } + + // HTTP-network-or-cache fetch steps 2.4-2.7 + let contentLengthValue = null; + if (request.body === null && /^(post|put)$/i.test(request.method)) { + contentLengthValue = '0'; + } + + if (request.body !== null) { + const totalBytes = getTotalBytes(request); + // Set Content-Length if totalBytes is a number (that is not NaN) + if (typeof totalBytes === 'number' && !Number.isNaN(totalBytes)) { + contentLengthValue = String(totalBytes); + } + } + + if (contentLengthValue) { + headers.set('Content-Length', contentLengthValue); + } + + // 4.1. Main fetch, step 2.6 + // > If request's referrer policy is the empty string, then set request's referrer policy to the + // > default referrer policy. + if (request.referrerPolicy === '') { + request.referrerPolicy = DEFAULT_REFERRER_POLICY; + } + + // 4.1. Main fetch, step 2.7 + // > If request's referrer is not "no-referrer", set request's referrer to the result of invoking + // > determine request's referrer. + if (request.referrer && request.referrer !== 'no-referrer') { + request[INTERNALS].referrer = determineRequestsReferrer(request); + } else { + request[INTERNALS].referrer = 'no-referrer'; + } + + // 4.5. HTTP-network-or-cache fetch, step 6.9 + // > If httpRequest's referrer is a URL, then append `Referer`/httpRequest's referrer, serialized + // > and isomorphic encoded, to httpRequest's header list. + if (request[INTERNALS].referrer instanceof URL) { + headers.set('Referer', request.referrer); + } + + // HTTP-network-or-cache fetch step 2.11 + if (!headers.has('User-Agent')) { + headers.set('User-Agent', 'node-fetch'); + } + + // HTTP-network-or-cache fetch step 2.15 + if (request.compress && !headers.has('Accept-Encoding')) { + headers.set('Accept-Encoding', 'gzip, deflate, br'); + } + + let {agent} = request; + if (typeof agent === 'function') { + agent = agent(parsedURL); + } + + // HTTP-network fetch step 4.2 + // chunked encoding is handled by Node.js + + const search = getSearch(parsedURL); + + // Pass the full URL directly to request(), but overwrite the following + // options: + const options = { + // Overwrite search to retain trailing ? (issue #776) + path: parsedURL.pathname + search, + // The following options are not expressed in the URL + method: request.method, + headers: headers[Symbol.for('nodejs.util.inspect.custom')](), + insecureHTTPParser: request.insecureHTTPParser, + agent + }; + + return { + /** @type {URL} */ + parsedURL, + options + }; +}; diff --git a/node_modules/node-fetch/src/response.js b/node_modules/node-fetch/src/response.js new file mode 100644 index 00000000..9806c0cb --- /dev/null +++ b/node_modules/node-fetch/src/response.js @@ -0,0 +1,160 @@ +/** + * Response.js + * + * Response class provides content decoding + */ + +import Headers from './headers.js'; +import Body, {clone, extractContentType} from './body.js'; +import {isRedirect} from './utils/is-redirect.js'; + +const INTERNALS = Symbol('Response internals'); + +/** + * Response class + * + * Ref: https://fetch.spec.whatwg.org/#response-class + * + * @param Stream body Readable stream + * @param Object opts Response options + * @return Void + */ +export default class Response extends Body { + constructor(body = null, options = {}) { + super(body, options); + + // eslint-disable-next-line no-eq-null, eqeqeq, no-negated-condition + const status = options.status != null ? options.status : 200; + + const headers = new Headers(options.headers); + + if (body !== null && !headers.has('Content-Type')) { + const contentType = extractContentType(body, this); + if (contentType) { + headers.append('Content-Type', contentType); + } + } + + this[INTERNALS] = { + type: 'default', + url: options.url, + status, + statusText: options.statusText || '', + headers, + counter: options.counter, + highWaterMark: options.highWaterMark + }; + } + + get type() { + return this[INTERNALS].type; + } + + get url() { + return this[INTERNALS].url || ''; + } + + get status() { + return this[INTERNALS].status; + } + + /** + * Convenience property representing if the request ended normally + */ + get ok() { + return this[INTERNALS].status >= 200 && this[INTERNALS].status < 300; + } + + get redirected() { + return this[INTERNALS].counter > 0; + } + + get statusText() { + return this[INTERNALS].statusText; + } + + get headers() { + return this[INTERNALS].headers; + } + + get highWaterMark() { + return this[INTERNALS].highWaterMark; + } + + /** + * Clone this response + * + * @return Response + */ + clone() { + return new Response(clone(this, this.highWaterMark), { + type: this.type, + url: this.url, + status: this.status, + statusText: this.statusText, + headers: this.headers, + ok: this.ok, + redirected: this.redirected, + size: this.size, + highWaterMark: this.highWaterMark + }); + } + + /** + * @param {string} url The URL that the new response is to originate from. + * @param {number} status An optional status code for the response (e.g., 302.) + * @returns {Response} A Response object. + */ + static redirect(url, status = 302) { + if (!isRedirect(status)) { + throw new RangeError('Failed to execute "redirect" on "response": Invalid status code'); + } + + return new Response(null, { + headers: { + location: new URL(url).toString() + }, + status + }); + } + + static error() { + const response = new Response(null, {status: 0, statusText: ''}); + response[INTERNALS].type = 'error'; + return response; + } + + static json(data = undefined, init = {}) { + const body = JSON.stringify(data); + + if (body === undefined) { + throw new TypeError('data is not JSON serializable'); + } + + const headers = new Headers(init && init.headers); + + if (!headers.has('content-type')) { + headers.set('content-type', 'application/json'); + } + + return new Response(body, { + ...init, + headers + }); + } + + get [Symbol.toStringTag]() { + return 'Response'; + } +} + +Object.defineProperties(Response.prototype, { + type: {enumerable: true}, + url: {enumerable: true}, + status: {enumerable: true}, + ok: {enumerable: true}, + redirected: {enumerable: true}, + statusText: {enumerable: true}, + headers: {enumerable: true}, + clone: {enumerable: true} +}); diff --git a/node_modules/node-fetch/src/utils/get-search.js b/node_modules/node-fetch/src/utils/get-search.js new file mode 100644 index 00000000..d067e7c7 --- /dev/null +++ b/node_modules/node-fetch/src/utils/get-search.js @@ -0,0 +1,9 @@ +export const getSearch = parsedURL => { + if (parsedURL.search) { + return parsedURL.search; + } + + const lastOffset = parsedURL.href.length - 1; + const hash = parsedURL.hash || (parsedURL.href[lastOffset] === '#' ? '#' : ''); + return parsedURL.href[lastOffset - hash.length] === '?' ? '?' : ''; +}; diff --git a/node_modules/node-fetch/src/utils/is-redirect.js b/node_modules/node-fetch/src/utils/is-redirect.js new file mode 100644 index 00000000..d1347f00 --- /dev/null +++ b/node_modules/node-fetch/src/utils/is-redirect.js @@ -0,0 +1,11 @@ +const redirectStatus = new Set([301, 302, 303, 307, 308]); + +/** + * Redirect code matching + * + * @param {number} code - Status code + * @return {boolean} + */ +export const isRedirect = code => { + return redirectStatus.has(code); +}; diff --git a/node_modules/node-fetch/src/utils/is.js b/node_modules/node-fetch/src/utils/is.js new file mode 100644 index 00000000..f9e467e4 --- /dev/null +++ b/node_modules/node-fetch/src/utils/is.js @@ -0,0 +1,87 @@ +/** + * Is.js + * + * Object type checks. + */ + +const NAME = Symbol.toStringTag; + +/** + * Check if `obj` is a URLSearchParams object + * ref: https://github.com/node-fetch/node-fetch/issues/296#issuecomment-307598143 + * @param {*} object - Object to check for + * @return {boolean} + */ +export const isURLSearchParameters = object => { + return ( + typeof object === 'object' && + typeof object.append === 'function' && + typeof object.delete === 'function' && + typeof object.get === 'function' && + typeof object.getAll === 'function' && + typeof object.has === 'function' && + typeof object.set === 'function' && + typeof object.sort === 'function' && + object[NAME] === 'URLSearchParams' + ); +}; + +/** + * Check if `object` is a W3C `Blob` object (which `File` inherits from) + * @param {*} object - Object to check for + * @return {boolean} + */ +export const isBlob = object => { + return ( + object && + typeof object === 'object' && + typeof object.arrayBuffer === 'function' && + typeof object.type === 'string' && + typeof object.stream === 'function' && + typeof object.constructor === 'function' && + /^(Blob|File)$/.test(object[NAME]) + ); +}; + +/** + * Check if `obj` is an instance of AbortSignal. + * @param {*} object - Object to check for + * @return {boolean} + */ +export const isAbortSignal = object => { + return ( + typeof object === 'object' && ( + object[NAME] === 'AbortSignal' || + object[NAME] === 'EventTarget' + ) + ); +}; + +/** + * isDomainOrSubdomain reports whether sub is a subdomain (or exact match) of + * the parent domain. + * + * Both domains must already be in canonical form. + * @param {string|URL} original + * @param {string|URL} destination + */ +export const isDomainOrSubdomain = (destination, original) => { + const orig = new URL(original).hostname; + const dest = new URL(destination).hostname; + + return orig === dest || orig.endsWith(`.${dest}`); +}; + +/** + * isSameProtocol reports whether the two provided URLs use the same protocol. + * + * Both domains must already be in canonical form. + * @param {string|URL} original + * @param {string|URL} destination + */ +export const isSameProtocol = (destination, original) => { + const orig = new URL(original).protocol; + const dest = new URL(destination).protocol; + + return orig === dest; +}; diff --git a/node_modules/node-fetch/src/utils/multipart-parser.js b/node_modules/node-fetch/src/utils/multipart-parser.js new file mode 100644 index 00000000..5ad06f98 --- /dev/null +++ b/node_modules/node-fetch/src/utils/multipart-parser.js @@ -0,0 +1,432 @@ +import {File} from 'fetch-blob/from.js'; +import {FormData} from 'formdata-polyfill/esm.min.js'; + +let s = 0; +const S = { + START_BOUNDARY: s++, + HEADER_FIELD_START: s++, + HEADER_FIELD: s++, + HEADER_VALUE_START: s++, + HEADER_VALUE: s++, + HEADER_VALUE_ALMOST_DONE: s++, + HEADERS_ALMOST_DONE: s++, + PART_DATA_START: s++, + PART_DATA: s++, + END: s++ +}; + +let f = 1; +const F = { + PART_BOUNDARY: f, + LAST_BOUNDARY: f *= 2 +}; + +const LF = 10; +const CR = 13; +const SPACE = 32; +const HYPHEN = 45; +const COLON = 58; +const A = 97; +const Z = 122; + +const lower = c => c | 0x20; + +const noop = () => {}; + +class MultipartParser { + /** + * @param {string} boundary + */ + constructor(boundary) { + this.index = 0; + this.flags = 0; + + this.onHeaderEnd = noop; + this.onHeaderField = noop; + this.onHeadersEnd = noop; + this.onHeaderValue = noop; + this.onPartBegin = noop; + this.onPartData = noop; + this.onPartEnd = noop; + + this.boundaryChars = {}; + + boundary = '\r\n--' + boundary; + const ui8a = new Uint8Array(boundary.length); + for (let i = 0; i < boundary.length; i++) { + ui8a[i] = boundary.charCodeAt(i); + this.boundaryChars[ui8a[i]] = true; + } + + this.boundary = ui8a; + this.lookbehind = new Uint8Array(this.boundary.length + 8); + this.state = S.START_BOUNDARY; + } + + /** + * @param {Uint8Array} data + */ + write(data) { + let i = 0; + const length_ = data.length; + let previousIndex = this.index; + let {lookbehind, boundary, boundaryChars, index, state, flags} = this; + const boundaryLength = this.boundary.length; + const boundaryEnd = boundaryLength - 1; + const bufferLength = data.length; + let c; + let cl; + + const mark = name => { + this[name + 'Mark'] = i; + }; + + const clear = name => { + delete this[name + 'Mark']; + }; + + const callback = (callbackSymbol, start, end, ui8a) => { + if (start === undefined || start !== end) { + this[callbackSymbol](ui8a && ui8a.subarray(start, end)); + } + }; + + const dataCallback = (name, clear) => { + const markSymbol = name + 'Mark'; + if (!(markSymbol in this)) { + return; + } + + if (clear) { + callback(name, this[markSymbol], i, data); + delete this[markSymbol]; + } else { + callback(name, this[markSymbol], data.length, data); + this[markSymbol] = 0; + } + }; + + for (i = 0; i < length_; i++) { + c = data[i]; + + switch (state) { + case S.START_BOUNDARY: + if (index === boundary.length - 2) { + if (c === HYPHEN) { + flags |= F.LAST_BOUNDARY; + } else if (c !== CR) { + return; + } + + index++; + break; + } else if (index - 1 === boundary.length - 2) { + if (flags & F.LAST_BOUNDARY && c === HYPHEN) { + state = S.END; + flags = 0; + } else if (!(flags & F.LAST_BOUNDARY) && c === LF) { + index = 0; + callback('onPartBegin'); + state = S.HEADER_FIELD_START; + } else { + return; + } + + break; + } + + if (c !== boundary[index + 2]) { + index = -2; + } + + if (c === boundary[index + 2]) { + index++; + } + + break; + case S.HEADER_FIELD_START: + state = S.HEADER_FIELD; + mark('onHeaderField'); + index = 0; + // falls through + case S.HEADER_FIELD: + if (c === CR) { + clear('onHeaderField'); + state = S.HEADERS_ALMOST_DONE; + break; + } + + index++; + if (c === HYPHEN) { + break; + } + + if (c === COLON) { + if (index === 1) { + // empty header field + return; + } + + dataCallback('onHeaderField', true); + state = S.HEADER_VALUE_START; + break; + } + + cl = lower(c); + if (cl < A || cl > Z) { + return; + } + + break; + case S.HEADER_VALUE_START: + if (c === SPACE) { + break; + } + + mark('onHeaderValue'); + state = S.HEADER_VALUE; + // falls through + case S.HEADER_VALUE: + if (c === CR) { + dataCallback('onHeaderValue', true); + callback('onHeaderEnd'); + state = S.HEADER_VALUE_ALMOST_DONE; + } + + break; + case S.HEADER_VALUE_ALMOST_DONE: + if (c !== LF) { + return; + } + + state = S.HEADER_FIELD_START; + break; + case S.HEADERS_ALMOST_DONE: + if (c !== LF) { + return; + } + + callback('onHeadersEnd'); + state = S.PART_DATA_START; + break; + case S.PART_DATA_START: + state = S.PART_DATA; + mark('onPartData'); + // falls through + case S.PART_DATA: + previousIndex = index; + + if (index === 0) { + // boyer-moore derrived algorithm to safely skip non-boundary data + i += boundaryEnd; + while (i < bufferLength && !(data[i] in boundaryChars)) { + i += boundaryLength; + } + + i -= boundaryEnd; + c = data[i]; + } + + if (index < boundary.length) { + if (boundary[index] === c) { + if (index === 0) { + dataCallback('onPartData', true); + } + + index++; + } else { + index = 0; + } + } else if (index === boundary.length) { + index++; + if (c === CR) { + // CR = part boundary + flags |= F.PART_BOUNDARY; + } else if (c === HYPHEN) { + // HYPHEN = end boundary + flags |= F.LAST_BOUNDARY; + } else { + index = 0; + } + } else if (index - 1 === boundary.length) { + if (flags & F.PART_BOUNDARY) { + index = 0; + if (c === LF) { + // unset the PART_BOUNDARY flag + flags &= ~F.PART_BOUNDARY; + callback('onPartEnd'); + callback('onPartBegin'); + state = S.HEADER_FIELD_START; + break; + } + } else if (flags & F.LAST_BOUNDARY) { + if (c === HYPHEN) { + callback('onPartEnd'); + state = S.END; + flags = 0; + } else { + index = 0; + } + } else { + index = 0; + } + } + + if (index > 0) { + // when matching a possible boundary, keep a lookbehind reference + // in case it turns out to be a false lead + lookbehind[index - 1] = c; + } else if (previousIndex > 0) { + // if our boundary turned out to be rubbish, the captured lookbehind + // belongs to partData + const _lookbehind = new Uint8Array(lookbehind.buffer, lookbehind.byteOffset, lookbehind.byteLength); + callback('onPartData', 0, previousIndex, _lookbehind); + previousIndex = 0; + mark('onPartData'); + + // reconsider the current character even so it interrupted the sequence + // it could be the beginning of a new sequence + i--; + } + + break; + case S.END: + break; + default: + throw new Error(`Unexpected state entered: ${state}`); + } + } + + dataCallback('onHeaderField'); + dataCallback('onHeaderValue'); + dataCallback('onPartData'); + + // Update properties for the next call + this.index = index; + this.state = state; + this.flags = flags; + } + + end() { + if ((this.state === S.HEADER_FIELD_START && this.index === 0) || + (this.state === S.PART_DATA && this.index === this.boundary.length)) { + this.onPartEnd(); + } else if (this.state !== S.END) { + throw new Error('MultipartParser.end(): stream ended unexpectedly'); + } + } +} + +function _fileName(headerValue) { + // matches either a quoted-string or a token (RFC 2616 section 19.5.1) + const m = headerValue.match(/\bfilename=("(.*?)"|([^()<>@,;:\\"/[\]?={}\s\t]+))($|;\s)/i); + if (!m) { + return; + } + + const match = m[2] || m[3] || ''; + let filename = match.slice(match.lastIndexOf('\\') + 1); + filename = filename.replace(/%22/g, '"'); + filename = filename.replace(/&#(\d{4});/g, (m, code) => { + return String.fromCharCode(code); + }); + return filename; +} + +export async function toFormData(Body, ct) { + if (!/multipart/i.test(ct)) { + throw new TypeError('Failed to fetch'); + } + + const m = ct.match(/boundary=(?:"([^"]+)"|([^;]+))/i); + + if (!m) { + throw new TypeError('no or bad content-type header, no multipart boundary'); + } + + const parser = new MultipartParser(m[1] || m[2]); + + let headerField; + let headerValue; + let entryValue; + let entryName; + let contentType; + let filename; + const entryChunks = []; + const formData = new FormData(); + + const onPartData = ui8a => { + entryValue += decoder.decode(ui8a, {stream: true}); + }; + + const appendToFile = ui8a => { + entryChunks.push(ui8a); + }; + + const appendFileToFormData = () => { + const file = new File(entryChunks, filename, {type: contentType}); + formData.append(entryName, file); + }; + + const appendEntryToFormData = () => { + formData.append(entryName, entryValue); + }; + + const decoder = new TextDecoder('utf-8'); + decoder.decode(); + + parser.onPartBegin = function () { + parser.onPartData = onPartData; + parser.onPartEnd = appendEntryToFormData; + + headerField = ''; + headerValue = ''; + entryValue = ''; + entryName = ''; + contentType = ''; + filename = null; + entryChunks.length = 0; + }; + + parser.onHeaderField = function (ui8a) { + headerField += decoder.decode(ui8a, {stream: true}); + }; + + parser.onHeaderValue = function (ui8a) { + headerValue += decoder.decode(ui8a, {stream: true}); + }; + + parser.onHeaderEnd = function () { + headerValue += decoder.decode(); + headerField = headerField.toLowerCase(); + + if (headerField === 'content-disposition') { + // matches either a quoted-string or a token (RFC 2616 section 19.5.1) + const m = headerValue.match(/\bname=("([^"]*)"|([^()<>@,;:\\"/[\]?={}\s\t]+))/i); + + if (m) { + entryName = m[2] || m[3] || ''; + } + + filename = _fileName(headerValue); + + if (filename) { + parser.onPartData = appendToFile; + parser.onPartEnd = appendFileToFormData; + } + } else if (headerField === 'content-type') { + contentType = headerValue; + } + + headerValue = ''; + headerField = ''; + }; + + for await (const chunk of Body) { + parser.write(chunk); + } + + parser.end(); + + return formData; +} diff --git a/node_modules/node-fetch/src/utils/referrer.js b/node_modules/node-fetch/src/utils/referrer.js new file mode 100644 index 00000000..6741f2fc --- /dev/null +++ b/node_modules/node-fetch/src/utils/referrer.js @@ -0,0 +1,340 @@ +import {isIP} from 'node:net'; + +/** + * @external URL + * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/URL|URL} + */ + +/** + * @module utils/referrer + * @private + */ + +/** + * @see {@link https://w3c.github.io/webappsec-referrer-policy/#strip-url|Referrer Policy §8.4. Strip url for use as a referrer} + * @param {string} URL + * @param {boolean} [originOnly=false] + */ +export function stripURLForUseAsAReferrer(url, originOnly = false) { + // 1. If url is null, return no referrer. + if (url == null) { // eslint-disable-line no-eq-null, eqeqeq + return 'no-referrer'; + } + + url = new URL(url); + + // 2. If url's scheme is a local scheme, then return no referrer. + if (/^(about|blob|data):$/.test(url.protocol)) { + return 'no-referrer'; + } + + // 3. Set url's username to the empty string. + url.username = ''; + + // 4. Set url's password to null. + // Note: `null` appears to be a mistake as this actually results in the password being `"null"`. + url.password = ''; + + // 5. Set url's fragment to null. + // Note: `null` appears to be a mistake as this actually results in the fragment being `"#null"`. + url.hash = ''; + + // 6. If the origin-only flag is true, then: + if (originOnly) { + // 6.1. Set url's path to null. + // Note: `null` appears to be a mistake as this actually results in the path being `"/null"`. + url.pathname = ''; + + // 6.2. Set url's query to null. + // Note: `null` appears to be a mistake as this actually results in the query being `"?null"`. + url.search = ''; + } + + // 7. Return url. + return url; +} + +/** + * @see {@link https://w3c.github.io/webappsec-referrer-policy/#enumdef-referrerpolicy|enum ReferrerPolicy} + */ +export const ReferrerPolicy = new Set([ + '', + 'no-referrer', + 'no-referrer-when-downgrade', + 'same-origin', + 'origin', + 'strict-origin', + 'origin-when-cross-origin', + 'strict-origin-when-cross-origin', + 'unsafe-url' +]); + +/** + * @see {@link https://w3c.github.io/webappsec-referrer-policy/#default-referrer-policy|default referrer policy} + */ +export const DEFAULT_REFERRER_POLICY = 'strict-origin-when-cross-origin'; + +/** + * @see {@link https://w3c.github.io/webappsec-referrer-policy/#referrer-policies|Referrer Policy §3. Referrer Policies} + * @param {string} referrerPolicy + * @returns {string} referrerPolicy + */ +export function validateReferrerPolicy(referrerPolicy) { + if (!ReferrerPolicy.has(referrerPolicy)) { + throw new TypeError(`Invalid referrerPolicy: ${referrerPolicy}`); + } + + return referrerPolicy; +} + +/** + * @see {@link https://w3c.github.io/webappsec-secure-contexts/#is-origin-trustworthy|Referrer Policy §3.2. Is origin potentially trustworthy?} + * @param {external:URL} url + * @returns `true`: "Potentially Trustworthy", `false`: "Not Trustworthy" + */ +export function isOriginPotentiallyTrustworthy(url) { + // 1. If origin is an opaque origin, return "Not Trustworthy". + // Not applicable + + // 2. Assert: origin is a tuple origin. + // Not for implementations + + // 3. If origin's scheme is either "https" or "wss", return "Potentially Trustworthy". + if (/^(http|ws)s:$/.test(url.protocol)) { + return true; + } + + // 4. If origin's host component matches one of the CIDR notations 127.0.0.0/8 or ::1/128 [RFC4632], return "Potentially Trustworthy". + const hostIp = url.host.replace(/(^\[)|(]$)/g, ''); + const hostIPVersion = isIP(hostIp); + + if (hostIPVersion === 4 && /^127\./.test(hostIp)) { + return true; + } + + if (hostIPVersion === 6 && /^(((0+:){7})|(::(0+:){0,6}))0*1$/.test(hostIp)) { + return true; + } + + // 5. If origin's host component is "localhost" or falls within ".localhost", and the user agent conforms to the name resolution rules in [let-localhost-be-localhost], return "Potentially Trustworthy". + // We are returning FALSE here because we cannot ensure conformance to + // let-localhost-be-loalhost (https://tools.ietf.org/html/draft-west-let-localhost-be-localhost) + if (url.host === 'localhost' || url.host.endsWith('.localhost')) { + return false; + } + + // 6. If origin's scheme component is file, return "Potentially Trustworthy". + if (url.protocol === 'file:') { + return true; + } + + // 7. If origin's scheme component is one which the user agent considers to be authenticated, return "Potentially Trustworthy". + // Not supported + + // 8. If origin has been configured as a trustworthy origin, return "Potentially Trustworthy". + // Not supported + + // 9. Return "Not Trustworthy". + return false; +} + +/** + * @see {@link https://w3c.github.io/webappsec-secure-contexts/#is-url-trustworthy|Referrer Policy §3.3. Is url potentially trustworthy?} + * @param {external:URL} url + * @returns `true`: "Potentially Trustworthy", `false`: "Not Trustworthy" + */ +export function isUrlPotentiallyTrustworthy(url) { + // 1. If url is "about:blank" or "about:srcdoc", return "Potentially Trustworthy". + if (/^about:(blank|srcdoc)$/.test(url)) { + return true; + } + + // 2. If url's scheme is "data", return "Potentially Trustworthy". + if (url.protocol === 'data:') { + return true; + } + + // Note: The origin of blob: and filesystem: URLs is the origin of the context in which they were + // created. Therefore, blobs created in a trustworthy origin will themselves be potentially + // trustworthy. + if (/^(blob|filesystem):$/.test(url.protocol)) { + return true; + } + + // 3. Return the result of executing §3.2 Is origin potentially trustworthy? on url's origin. + return isOriginPotentiallyTrustworthy(url); +} + +/** + * Modifies the referrerURL to enforce any extra security policy considerations. + * @see {@link https://w3c.github.io/webappsec-referrer-policy/#determine-requests-referrer|Referrer Policy §8.3. Determine request's Referrer}, step 7 + * @callback module:utils/referrer~referrerURLCallback + * @param {external:URL} referrerURL + * @returns {external:URL} modified referrerURL + */ + +/** + * Modifies the referrerOrigin to enforce any extra security policy considerations. + * @see {@link https://w3c.github.io/webappsec-referrer-policy/#determine-requests-referrer|Referrer Policy §8.3. Determine request's Referrer}, step 7 + * @callback module:utils/referrer~referrerOriginCallback + * @param {external:URL} referrerOrigin + * @returns {external:URL} modified referrerOrigin + */ + +/** + * @see {@link https://w3c.github.io/webappsec-referrer-policy/#determine-requests-referrer|Referrer Policy §8.3. Determine request's Referrer} + * @param {Request} request + * @param {object} o + * @param {module:utils/referrer~referrerURLCallback} o.referrerURLCallback + * @param {module:utils/referrer~referrerOriginCallback} o.referrerOriginCallback + * @returns {external:URL} Request's referrer + */ +export function determineRequestsReferrer(request, {referrerURLCallback, referrerOriginCallback} = {}) { + // There are 2 notes in the specification about invalid pre-conditions. We return null, here, for + // these cases: + // > Note: If request's referrer is "no-referrer", Fetch will not call into this algorithm. + // > Note: If request's referrer policy is the empty string, Fetch will not call into this + // > algorithm. + if (request.referrer === 'no-referrer' || request.referrerPolicy === '') { + return null; + } + + // 1. Let policy be request's associated referrer policy. + const policy = request.referrerPolicy; + + // 2. Let environment be request's client. + // not applicable to node.js + + // 3. Switch on request's referrer: + if (request.referrer === 'about:client') { + return 'no-referrer'; + } + + // "a URL": Let referrerSource be request's referrer. + const referrerSource = request.referrer; + + // 4. Let request's referrerURL be the result of stripping referrerSource for use as a referrer. + let referrerURL = stripURLForUseAsAReferrer(referrerSource); + + // 5. Let referrerOrigin be the result of stripping referrerSource for use as a referrer, with the + // origin-only flag set to true. + let referrerOrigin = stripURLForUseAsAReferrer(referrerSource, true); + + // 6. If the result of serializing referrerURL is a string whose length is greater than 4096, set + // referrerURL to referrerOrigin. + if (referrerURL.toString().length > 4096) { + referrerURL = referrerOrigin; + } + + // 7. The user agent MAY alter referrerURL or referrerOrigin at this point to enforce arbitrary + // policy considerations in the interests of minimizing data leakage. For example, the user + // agent could strip the URL down to an origin, modify its host, replace it with an empty + // string, etc. + if (referrerURLCallback) { + referrerURL = referrerURLCallback(referrerURL); + } + + if (referrerOriginCallback) { + referrerOrigin = referrerOriginCallback(referrerOrigin); + } + + // 8.Execute the statements corresponding to the value of policy: + const currentURL = new URL(request.url); + + switch (policy) { + case 'no-referrer': + return 'no-referrer'; + + case 'origin': + return referrerOrigin; + + case 'unsafe-url': + return referrerURL; + + case 'strict-origin': + // 1. If referrerURL is a potentially trustworthy URL and request's current URL is not a + // potentially trustworthy URL, then return no referrer. + if (isUrlPotentiallyTrustworthy(referrerURL) && !isUrlPotentiallyTrustworthy(currentURL)) { + return 'no-referrer'; + } + + // 2. Return referrerOrigin. + return referrerOrigin.toString(); + + case 'strict-origin-when-cross-origin': + // 1. If the origin of referrerURL and the origin of request's current URL are the same, then + // return referrerURL. + if (referrerURL.origin === currentURL.origin) { + return referrerURL; + } + + // 2. If referrerURL is a potentially trustworthy URL and request's current URL is not a + // potentially trustworthy URL, then return no referrer. + if (isUrlPotentiallyTrustworthy(referrerURL) && !isUrlPotentiallyTrustworthy(currentURL)) { + return 'no-referrer'; + } + + // 3. Return referrerOrigin. + return referrerOrigin; + + case 'same-origin': + // 1. If the origin of referrerURL and the origin of request's current URL are the same, then + // return referrerURL. + if (referrerURL.origin === currentURL.origin) { + return referrerURL; + } + + // 2. Return no referrer. + return 'no-referrer'; + + case 'origin-when-cross-origin': + // 1. If the origin of referrerURL and the origin of request's current URL are the same, then + // return referrerURL. + if (referrerURL.origin === currentURL.origin) { + return referrerURL; + } + + // Return referrerOrigin. + return referrerOrigin; + + case 'no-referrer-when-downgrade': + // 1. If referrerURL is a potentially trustworthy URL and request's current URL is not a + // potentially trustworthy URL, then return no referrer. + if (isUrlPotentiallyTrustworthy(referrerURL) && !isUrlPotentiallyTrustworthy(currentURL)) { + return 'no-referrer'; + } + + // 2. Return referrerURL. + return referrerURL; + + default: + throw new TypeError(`Invalid referrerPolicy: ${policy}`); + } +} + +/** + * @see {@link https://w3c.github.io/webappsec-referrer-policy/#parse-referrer-policy-from-header|Referrer Policy §8.1. Parse a referrer policy from a Referrer-Policy header} + * @param {Headers} headers Response headers + * @returns {string} policy + */ +export function parseReferrerPolicyFromHeader(headers) { + // 1. Let policy-tokens be the result of extracting header list values given `Referrer-Policy` + // and response’s header list. + const policyTokens = (headers.get('referrer-policy') || '').split(/[,\s]+/); + + // 2. Let policy be the empty string. + let policy = ''; + + // 3. For each token in policy-tokens, if token is a referrer policy and token is not the empty + // string, then set policy to token. + // Note: This algorithm loops over multiple policy values to allow deployment of new policy + // values with fallbacks for older user agents, as described in § 11.1 Unknown Policy Values. + for (const token of policyTokens) { + if (token && ReferrerPolicy.has(token)) { + policy = token; + } + } + + // 4. Return policy. + return policy; +} diff --git a/node_modules/path-posix/.npmignore b/node_modules/path-posix/.npmignore new file mode 100644 index 00000000..fd4f2b06 --- /dev/null +++ b/node_modules/path-posix/.npmignore @@ -0,0 +1,2 @@ +node_modules +.DS_Store diff --git a/node_modules/path-posix/LICENSE.md b/node_modules/path-posix/LICENSE.md new file mode 100644 index 00000000..195b5718 --- /dev/null +++ b/node_modules/path-posix/LICENSE.md @@ -0,0 +1,24 @@ +Node's license follows: + +==== + +Copyright Joyent, Inc. and other Node contributors. All rights reserved. +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to +deal in the Software without restriction, including without limitation the +rights to use, copy, modify, merge, publish, distribute, sublicense, and/or +sell copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS +IN THE SOFTWARE. + +==== diff --git a/node_modules/path-posix/README.md b/node_modules/path-posix/README.md new file mode 100644 index 00000000..81e6c21d --- /dev/null +++ b/node_modules/path-posix/README.md @@ -0,0 +1,30 @@ +# path-posix +posix-specific core path module + +## usage +```js +var path = require('path-posix') +path.resolve(__dirname, 'foo') +``` + +Extracted from lib/path.js in joyent/node@31d4847d8b18cf487775dee3471dd4653b7d860b (master as of 2015/01/26) + +## api +see [http://nodejs.org/api/path.html#path_path_resolve_from_to](http://nodejs.org/api/path.html#path_path_resolve_from_to) + +## installation + + $ npm install path-posix + + +## running the tests + +From package root: + + $ npm install + $ npm test + + +## license + +See LICENSE.md \ No newline at end of file diff --git a/node_modules/path-posix/index.js b/node_modules/path-posix/index.js new file mode 100644 index 00000000..d88ebdea --- /dev/null +++ b/node_modules/path-posix/index.js @@ -0,0 +1,274 @@ +// Copyright Joyent, Inc. and other Node contributors. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to permit +// persons to whom the Software is furnished to do so, subject to the +// following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN +// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, +// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR +// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE +// USE OR OTHER DEALINGS IN THE SOFTWARE. + +'use strict'; +var util = require('util'); +var isString = function (x) { + return typeof x === 'string'; +}; + + +// resolves . and .. elements in a path array with directory names there +// must be no slashes or device names (c:\) in the array +// (so also no leading and trailing slashes - it does not distinguish +// relative and absolute paths) +function normalizeArray(parts, allowAboveRoot) { + var res = []; + for (var i = 0; i < parts.length; i++) { + var p = parts[i]; + + // ignore empty parts + if (!p || p === '.') + continue; + + if (p === '..') { + if (res.length && res[res.length - 1] !== '..') { + res.pop(); + } else if (allowAboveRoot) { + res.push('..'); + } + } else { + res.push(p); + } + } + + return res; +} + +// Split a filename into [root, dir, basename, ext], unix version +// 'root' is just a slash, or nothing. +var splitPathRe = + /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/; +var posix = {}; + + +function posixSplitPath(filename) { + return splitPathRe.exec(filename).slice(1); +} + + +// path.resolve([from ...], to) +// posix version +posix.resolve = function() { + var resolvedPath = '', + resolvedAbsolute = false; + + for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) { + var path = (i >= 0) ? arguments[i] : process.cwd(); + + // Skip empty and invalid entries + if (!isString(path)) { + throw new TypeError('Arguments to path.resolve must be strings'); + } else if (!path) { + continue; + } + + resolvedPath = path + '/' + resolvedPath; + resolvedAbsolute = path.charAt(0) === '/'; + } + + // At this point the path should be resolved to a full absolute path, but + // handle relative paths to be safe (might happen when process.cwd() fails) + + // Normalize the path + resolvedPath = normalizeArray(resolvedPath.split('/'), + !resolvedAbsolute).join('/'); + + return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.'; +}; + +// path.normalize(path) +// posix version +posix.normalize = function(path) { + var isAbsolute = posix.isAbsolute(path), + trailingSlash = path.substr(-1) === '/'; + + // Normalize the path + path = normalizeArray(path.split('/'), !isAbsolute).join('/'); + + if (!path && !isAbsolute) { + path = '.'; + } + if (path && trailingSlash) { + path += '/'; + } + + return (isAbsolute ? '/' : '') + path; +}; + +// posix version +posix.isAbsolute = function(path) { + return path.charAt(0) === '/'; +}; + +// posix version +posix.join = function() { + var path = ''; + for (var i = 0; i < arguments.length; i++) { + var segment = arguments[i]; + if (!isString(segment)) { + throw new TypeError('Arguments to path.join must be strings'); + } + if (segment) { + if (!path) { + path += segment; + } else { + path += '/' + segment; + } + } + } + return posix.normalize(path); +}; + + +// path.relative(from, to) +// posix version +posix.relative = function(from, to) { + from = posix.resolve(from).substr(1); + to = posix.resolve(to).substr(1); + + function trim(arr) { + var start = 0; + for (; start < arr.length; start++) { + if (arr[start] !== '') break; + } + + var end = arr.length - 1; + for (; end >= 0; end--) { + if (arr[end] !== '') break; + } + + if (start > end) return []; + return arr.slice(start, end + 1); + } + + var fromParts = trim(from.split('/')); + var toParts = trim(to.split('/')); + + var length = Math.min(fromParts.length, toParts.length); + var samePartsLength = length; + for (var i = 0; i < length; i++) { + if (fromParts[i] !== toParts[i]) { + samePartsLength = i; + break; + } + } + + var outputParts = []; + for (var i = samePartsLength; i < fromParts.length; i++) { + outputParts.push('..'); + } + + outputParts = outputParts.concat(toParts.slice(samePartsLength)); + + return outputParts.join('/'); +}; + + +posix._makeLong = function(path) { + return path; +}; + + +posix.dirname = function(path) { + var result = posixSplitPath(path), + root = result[0], + dir = result[1]; + + if (!root && !dir) { + // No dirname whatsoever + return '.'; + } + + if (dir) { + // It has a dirname, strip trailing slash + dir = dir.substr(0, dir.length - 1); + } + + return root + dir; +}; + + +posix.basename = function(path, ext) { + var f = posixSplitPath(path)[2]; + // TODO: make this comparison case-insensitive on windows? + if (ext && f.substr(-1 * ext.length) === ext) { + f = f.substr(0, f.length - ext.length); + } + return f; +}; + + +posix.extname = function(path) { + return posixSplitPath(path)[3]; +}; + + +posix.format = function(pathObject) { + if (!util.isObject(pathObject)) { + throw new TypeError( + "Parameter 'pathObject' must be an object, not " + typeof pathObject + ); + } + + var root = pathObject.root || ''; + + if (!isString(root)) { + throw new TypeError( + "'pathObject.root' must be a string or undefined, not " + + typeof pathObject.root + ); + } + + var dir = pathObject.dir ? pathObject.dir + posix.sep : ''; + var base = pathObject.base || ''; + return dir + base; +}; + + +posix.parse = function(pathString) { + if (!isString(pathString)) { + throw new TypeError( + "Parameter 'pathString' must be a string, not " + typeof pathString + ); + } + var allParts = posixSplitPath(pathString); + if (!allParts || allParts.length !== 4) { + throw new TypeError("Invalid path '" + pathString + "'"); + } + allParts[1] = allParts[1] || ''; + allParts[2] = allParts[2] || ''; + allParts[3] = allParts[3] || ''; + + return { + root: allParts[0], + dir: allParts[0] + allParts[1].slice(0, allParts[1].length - 1), + base: allParts[2], + ext: allParts[3], + name: allParts[2].slice(0, allParts[2].length - allParts[3].length) + }; +}; + + +posix.sep = '/'; +posix.delimiter = ':'; + + module.exports = posix; diff --git a/node_modules/path-posix/package.json b/node_modules/path-posix/package.json new file mode 100644 index 00000000..61ce01a2 --- /dev/null +++ b/node_modules/path-posix/package.json @@ -0,0 +1,14 @@ +{ + "name": "path-posix", + "author": "jden ", + "version": "1.0.0", + "description": "posix-specific core path module", + "keywords": ["path"], + "main": "index.js", + "scripts": { + "test": "node test/test-path" + }, + "repository": "git@github.com:jden/node-path-posix.git", + "license": "ISC", + "readmeFilename": "README.md" +} diff --git a/node_modules/path-posix/test/test-path.js b/node_modules/path-posix/test/test-path.js new file mode 100644 index 00000000..7fa4f666 --- /dev/null +++ b/node_modules/path-posix/test/test-path.js @@ -0,0 +1,248 @@ +// Copyright Joyent, Inc. and other Node contributors. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to permit +// persons to whom the Software is furnished to do so, subject to the +// following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN +// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, +// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR +// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE +// USE OR OTHER DEALINGS IN THE SOFTWARE. + +var assert = require('assert'); + +var path = require('..'); + +var f = '/foo/test/simple/test-path.js'; + +assert.equal(path.basename(f), 'test-path.js'); +assert.equal(path.basename(f, '.js'), 'test-path'); +assert.equal(path.basename(''), ''); +assert.equal(path.basename('/dir/basename.ext'), 'basename.ext'); +assert.equal(path.basename('/basename.ext'), 'basename.ext'); +assert.equal(path.basename('basename.ext'), 'basename.ext'); +assert.equal(path.basename('basename.ext/'), 'basename.ext'); +assert.equal(path.basename('basename.ext//'), 'basename.ext'); + +// On unix a backslash is just treated as any other character. +assert.equal(path.basename('\\dir\\basename.ext'), '\\dir\\basename.ext'); +assert.equal(path.basename('\\basename.ext'), '\\basename.ext'); +assert.equal(path.basename('basename.ext'), 'basename.ext'); +assert.equal(path.basename('basename.ext\\'), 'basename.ext\\'); +assert.equal(path.basename('basename.ext\\\\'), 'basename.ext\\\\'); + +// POSIX filenames may include control characters +// c.f. http://www.dwheeler.com/essays/fixing-unix-linux-filenames.html + var controlCharFilename = 'Icon' + String.fromCharCode(13); + assert.equal(path.basename('/a/b/' + controlCharFilename), + controlCharFilename); + +assert.equal(path.extname(f), '.js'); + +assert.equal(path.dirname(f).substr(-11), 'test/simple'); +assert.equal(path.dirname('/a/b/'), '/a'); +assert.equal(path.dirname('/a/b'), '/a'); +assert.equal(path.dirname('/a'), '/'); +assert.equal(path.dirname(''), '.'); +assert.equal(path.dirname('/'), '/'); +assert.equal(path.dirname('////'), '/'); + + +assert.equal(path.extname(''), ''); +assert.equal(path.extname('/path/to/file'), ''); +assert.equal(path.extname('/path/to/file.ext'), '.ext'); +assert.equal(path.extname('/path.to/file.ext'), '.ext'); +assert.equal(path.extname('/path.to/file'), ''); +assert.equal(path.extname('/path.to/.file'), ''); +assert.equal(path.extname('/path.to/.file.ext'), '.ext'); +assert.equal(path.extname('/path/to/f.ext'), '.ext'); +assert.equal(path.extname('/path/to/..ext'), '.ext'); +assert.equal(path.extname('file'), ''); +assert.equal(path.extname('file.ext'), '.ext'); +assert.equal(path.extname('.file'), ''); +assert.equal(path.extname('.file.ext'), '.ext'); +assert.equal(path.extname('/file'), ''); +assert.equal(path.extname('/file.ext'), '.ext'); +assert.equal(path.extname('/.file'), ''); +assert.equal(path.extname('/.file.ext'), '.ext'); +assert.equal(path.extname('.path/file.ext'), '.ext'); +assert.equal(path.extname('file.ext.ext'), '.ext'); +assert.equal(path.extname('file.'), '.'); +assert.equal(path.extname('.'), ''); +assert.equal(path.extname('./'), ''); +assert.equal(path.extname('.file.ext'), '.ext'); +assert.equal(path.extname('.file'), ''); +assert.equal(path.extname('.file.'), '.'); +assert.equal(path.extname('.file..'), '.'); +assert.equal(path.extname('..'), ''); +assert.equal(path.extname('../'), ''); +assert.equal(path.extname('..file.ext'), '.ext'); +assert.equal(path.extname('..file'), '.file'); +assert.equal(path.extname('..file.'), '.'); +assert.equal(path.extname('..file..'), '.'); +assert.equal(path.extname('...'), '.'); +assert.equal(path.extname('...ext'), '.ext'); +assert.equal(path.extname('....'), '.'); +assert.equal(path.extname('file.ext/'), '.ext'); +assert.equal(path.extname('file.ext//'), '.ext'); +assert.equal(path.extname('file/'), ''); +assert.equal(path.extname('file//'), ''); +assert.equal(path.extname('file./'), '.'); +assert.equal(path.extname('file.//'), '.'); + +// On unix, backspace is a valid name component like any other character. +assert.equal(path.extname('.\\'), ''); +assert.equal(path.extname('..\\'), '.\\'); +assert.equal(path.extname('file.ext\\'), '.ext\\'); +assert.equal(path.extname('file.ext\\\\'), '.ext\\\\'); +assert.equal(path.extname('file\\'), ''); +assert.equal(path.extname('file\\\\'), ''); +assert.equal(path.extname('file.\\'), '.\\'); +assert.equal(path.extname('file.\\\\'), '.\\\\'); + +// path.join tests +var failures = []; +var joinTests = + // arguments result + [[['.', 'x/b', '..', '/b/c.js'], 'x/b/c.js'], + [['/.', 'x/b', '..', '/b/c.js'], '/x/b/c.js'], + [['/foo', '../../../bar'], '/bar'], + [['foo', '../../../bar'], '../../bar'], + [['foo/', '../../../bar'], '../../bar'], + [['foo/x', '../../../bar'], '../bar'], + [['foo/x', './bar'], 'foo/x/bar'], + [['foo/x/', './bar'], 'foo/x/bar'], + [['foo/x/', '.', 'bar'], 'foo/x/bar'], + [['./'], './'], + [['.', './'], './'], + [['.', '.', '.'], '.'], + [['.', './', '.'], '.'], + [['.', '/./', '.'], '.'], + [['.', '/////./', '.'], '.'], + [['.'], '.'], + [['', '.'], '.'], + [['', 'foo'], 'foo'], + [['foo', '/bar'], 'foo/bar'], + [['', '/foo'], '/foo'], + [['', '', '/foo'], '/foo'], + [['', '', 'foo'], 'foo'], + [['foo', ''], 'foo'], + [['foo/', ''], 'foo/'], + [['foo', '', '/bar'], 'foo/bar'], + [['./', '..', '/foo'], '../foo'], + [['./', '..', '..', '/foo'], '../../foo'], + [['.', '..', '..', '/foo'], '../../foo'], + [['', '..', '..', '/foo'], '../../foo'], + [['/'], '/'], + [['/', '.'], '/'], + [['/', '..'], '/'], + [['/', '..', '..'], '/'], + [[''], '.'], + [['', ''], '.'], + [[' /foo'], ' /foo'], + [[' ', 'foo'], ' /foo'], + [[' ', '.'], ' '], + [[' ', '/'], ' /'], + [[' ', ''], ' '], + [['/', 'foo'], '/foo'], + [['/', '/foo'], '/foo'], + [['/', '//foo'], '/foo'], + [['/', '', '/foo'], '/foo'], + [['', '/', 'foo'], '/foo'], + [['', '/', '/foo'], '/foo'] + ]; + +// Run the join tests. +joinTests.forEach(function(test) { + var actual = path.join.apply(path, test[0]); + var expected = test[1]; + var message = 'path.join(' + test[0].map(JSON.stringify).join(',') + ')' + + '\n expect=' + JSON.stringify(expected) + + '\n actual=' + JSON.stringify(actual); + if (actual !== expected) failures.push('\n' + message); + // assert.equal(actual, expected, message); +}); +assert.equal(failures.length, 0, failures.join('')); +var joinThrowTests = [true, false, 7, null, {}, undefined, [], NaN]; +joinThrowTests.forEach(function(test) { + assert.throws(function() { + path.join(test); + }, TypeError); + assert.throws(function() { + path.resolve(test); + }, TypeError); +}); + + +// path normalize tests + +assert.equal(path.normalize('./fixtures///b/../b/c.js'), + 'fixtures/b/c.js'); +assert.equal(path.normalize('/foo/../../../bar'), '/bar'); +assert.equal(path.normalize('a//b//../b'), 'a/b'); +assert.equal(path.normalize('a//b//./c'), 'a/b/c'); +assert.equal(path.normalize('a//b//.'), 'a/b'); + +// path.resolve tests + var resolveTests = + // arguments result + [[['/var/lib', '../', 'file/'], '/var/file'], + [['/var/lib', '/../', 'file/'], '/file'], + [['a/b/c/', '../../..'], process.cwd()], + [['.'], process.cwd()], + [['/some/dir', '.', '/absolute/'], '/absolute']]; + +var failures = []; +resolveTests.forEach(function(test) { + var actual = path.resolve.apply(path, test[0]); + var expected = test[1]; + var message = 'path.resolve(' + test[0].map(JSON.stringify).join(',') + ')' + + '\n expect=' + JSON.stringify(expected) + + '\n actual=' + JSON.stringify(actual); + if (actual !== expected) failures.push('\n' + message); + // assert.equal(actual, expected, message); +}); +assert.equal(failures.length, 0, failures.join('')); + +// path.isAbsolute tests +assert.equal(path.isAbsolute('/home/foo'), true); +assert.equal(path.isAbsolute('/home/foo/..'), true); +assert.equal(path.isAbsolute('bar/'), false); +assert.equal(path.isAbsolute('./baz'), false); + +// path.relative tests + var relativeTests = + // arguments result + [['/var/lib', '/var', '..'], + ['/var/lib', '/bin', '../../bin'], + ['/var/lib', '/var/lib', ''], + ['/var/lib', '/var/apache', '../apache'], + ['/var/', '/var/lib', 'lib'], + ['/', '/var/lib', 'var/lib']]; +var failures = []; +relativeTests.forEach(function(test) { + var actual = path.relative(test[0], test[1]); + var expected = test[2]; + var message = 'path.relative(' + + test.slice(0, 2).map(JSON.stringify).join(',') + + ')' + + '\n expect=' + JSON.stringify(expected) + + '\n actual=' + JSON.stringify(actual); + if (actual !== expected) failures.push('\n' + message); +}); +assert.equal(failures.length, 0, failures.join('')); + +assert.equal(path.sep, '/'); + +// path.delimiter tests +assert.equal(path.delimiter, ':'); diff --git a/node_modules/querystringify/LICENSE b/node_modules/querystringify/LICENSE new file mode 100644 index 00000000..6dc9316a --- /dev/null +++ b/node_modules/querystringify/LICENSE @@ -0,0 +1,22 @@ +The MIT License (MIT) + +Copyright (c) 2015 Unshift.io, Arnout Kazemier, the Contributors. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. + diff --git a/node_modules/querystringify/README.md b/node_modules/querystringify/README.md new file mode 100644 index 00000000..0339638c --- /dev/null +++ b/node_modules/querystringify/README.md @@ -0,0 +1,61 @@ +# querystringify + +[![Version npm](http://img.shields.io/npm/v/querystringify.svg?style=flat-square)](https://www.npmjs.com/package/querystringify)[![Build Status](http://img.shields.io/travis/unshiftio/querystringify/master.svg?style=flat-square)](https://travis-ci.org/unshiftio/querystringify)[![Dependencies](https://img.shields.io/david/unshiftio/querystringify.svg?style=flat-square)](https://david-dm.org/unshiftio/querystringify)[![Coverage Status](http://img.shields.io/coveralls/unshiftio/querystringify/master.svg?style=flat-square)](https://coveralls.io/r/unshiftio/querystringify?branch=master) + +A somewhat JSON compatible interface for query string parsing. This query string +parser is dumb, don't expect to much from it as it only wants to parse simple +query strings. If you want to parse complex, multi level and deeply nested +query strings then you should ask your self. WTF am I doing? + +## Installation + +This module is released in npm as `querystringify`. It's also compatible with +`browserify` so it can be used on the server as well as on the client. To +install it simply run the following command from your CLI: + +``` +npm install --save querystringify +``` + +## Usage + +In the following examples we assume that you've already required the library as: + +```js +'use strict'; + +var qs = require('querystringify'); +``` + +### qs.parse() + +The parse method transforms a given query string in to an object. Parameters +without values are set to empty strings. It does not care if your query string +is prefixed with a `?`, a `#`, or not prefixed. It just extracts the parts +between the `=` and `&`: + +```js +qs.parse('?foo=bar'); // { foo: 'bar' } +qs.parse('#foo=bar'); // { foo: 'bar' } +qs.parse('foo=bar'); // { foo: 'bar' } +qs.parse('foo=bar&bar=foo'); // { foo: 'bar', bar: 'foo' } +qs.parse('foo&bar=foo'); // { foo: '', bar: 'foo' } +``` + +### qs.stringify() + +This transforms a given object in to a query string. By default we return the +query string without a `?` prefix. If you want to prefix it by default simply +supply `true` as second argument. If it should be prefixed by something else +simply supply a string with the prefix value as second argument: + +```js +qs.stringify({ foo: bar }); // foo=bar +qs.stringify({ foo: bar }, true); // ?foo=bar +qs.stringify({ foo: bar }, '#'); // #foo=bar +qs.stringify({ foo: '' }, '&'); // &foo= +``` + +## License + +MIT diff --git a/node_modules/querystringify/index.js b/node_modules/querystringify/index.js new file mode 100644 index 00000000..58c9808b --- /dev/null +++ b/node_modules/querystringify/index.js @@ -0,0 +1,118 @@ +'use strict'; + +var has = Object.prototype.hasOwnProperty + , undef; + +/** + * Decode a URI encoded string. + * + * @param {String} input The URI encoded string. + * @returns {String|Null} The decoded string. + * @api private + */ +function decode(input) { + try { + return decodeURIComponent(input.replace(/\+/g, ' ')); + } catch (e) { + return null; + } +} + +/** + * Attempts to encode a given input. + * + * @param {String} input The string that needs to be encoded. + * @returns {String|Null} The encoded string. + * @api private + */ +function encode(input) { + try { + return encodeURIComponent(input); + } catch (e) { + return null; + } +} + +/** + * Simple query string parser. + * + * @param {String} query The query string that needs to be parsed. + * @returns {Object} + * @api public + */ +function querystring(query) { + var parser = /([^=?#&]+)=?([^&]*)/g + , result = {} + , part; + + while (part = parser.exec(query)) { + var key = decode(part[1]) + , value = decode(part[2]); + + // + // Prevent overriding of existing properties. This ensures that build-in + // methods like `toString` or __proto__ are not overriden by malicious + // querystrings. + // + // In the case if failed decoding, we want to omit the key/value pairs + // from the result. + // + if (key === null || value === null || key in result) continue; + result[key] = value; + } + + return result; +} + +/** + * Transform a query string to an object. + * + * @param {Object} obj Object that should be transformed. + * @param {String} prefix Optional prefix. + * @returns {String} + * @api public + */ +function querystringify(obj, prefix) { + prefix = prefix || ''; + + var pairs = [] + , value + , key; + + // + // Optionally prefix with a '?' if needed + // + if ('string' !== typeof prefix) prefix = '?'; + + for (key in obj) { + if (has.call(obj, key)) { + value = obj[key]; + + // + // Edge cases where we actually want to encode the value to an empty + // string instead of the stringified value. + // + if (!value && (value === null || value === undef || isNaN(value))) { + value = ''; + } + + key = encode(key); + value = encode(value); + + // + // If we failed to encode the strings, we should bail out as we don't + // want to add invalid strings to the query. + // + if (key === null || value === null) continue; + pairs.push(key +'='+ value); + } + } + + return pairs.length ? prefix + pairs.join('&') : ''; +} + +// +// Expose the module. +// +exports.stringify = querystringify; +exports.parse = querystring; diff --git a/node_modules/querystringify/package.json b/node_modules/querystringify/package.json new file mode 100644 index 00000000..7b259047 --- /dev/null +++ b/node_modules/querystringify/package.json @@ -0,0 +1,38 @@ +{ + "name": "querystringify", + "version": "2.2.0", + "description": "Querystringify - Small, simple but powerful query string parser.", + "main": "index.js", + "scripts": { + "test": "nyc --reporter=html --reporter=text mocha test.js", + "watch": "mocha --watch test.js" + }, + "repository": { + "type": "git", + "url": "https://github.com/unshiftio/querystringify" + }, + "keywords": [ + "query", + "string", + "query-string", + "querystring", + "qs", + "stringify", + "parse", + "decode", + "encode" + ], + "author": "Arnout Kazemier", + "license": "MIT", + "bugs": { + "url": "https://github.com/unshiftio/querystringify/issues" + }, + "homepage": "https://github.com/unshiftio/querystringify", + "devDependencies": { + "assume": "^2.1.0", + "coveralls": "^3.1.0", + "mocha": "^8.1.1", + "nyc": "^15.1.0", + "pre-commit": "^1.2.2" + } +} diff --git a/node_modules/requires-port/.npmignore b/node_modules/requires-port/.npmignore new file mode 100644 index 00000000..ba2a97b5 --- /dev/null +++ b/node_modules/requires-port/.npmignore @@ -0,0 +1,2 @@ +node_modules +coverage diff --git a/node_modules/requires-port/.travis.yml b/node_modules/requires-port/.travis.yml new file mode 100644 index 00000000..0765106a --- /dev/null +++ b/node_modules/requires-port/.travis.yml @@ -0,0 +1,19 @@ +sudo: false +language: node_js +node_js: + - "4" + - "iojs" + - "0.12" + - "0.10" +script: + - "npm run test-travis" +after_script: + - "npm install coveralls@2 && cat coverage/lcov.info | coveralls" +matrix: + fast_finish: true +notifications: + irc: + channels: + - "irc.freenode.org#unshift" + on_success: change + on_failure: change diff --git a/node_modules/requires-port/LICENSE b/node_modules/requires-port/LICENSE new file mode 100644 index 00000000..6dc9316a --- /dev/null +++ b/node_modules/requires-port/LICENSE @@ -0,0 +1,22 @@ +The MIT License (MIT) + +Copyright (c) 2015 Unshift.io, Arnout Kazemier, the Contributors. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. + diff --git a/node_modules/requires-port/README.md b/node_modules/requires-port/README.md new file mode 100644 index 00000000..3effe759 --- /dev/null +++ b/node_modules/requires-port/README.md @@ -0,0 +1,47 @@ +# requires-port + +[![Made by unshift](https://img.shields.io/badge/made%20by-unshift-00ffcc.svg?style=flat-square)](http://unshift.io)[![Version npm](http://img.shields.io/npm/v/requires-port.svg?style=flat-square)](http://browsenpm.org/package/requires-port)[![Build Status](http://img.shields.io/travis/unshiftio/requires-port/master.svg?style=flat-square)](https://travis-ci.org/unshiftio/requires-port)[![Dependencies](https://img.shields.io/david/unshiftio/requires-port.svg?style=flat-square)](https://david-dm.org/unshiftio/requires-port)[![Coverage Status](http://img.shields.io/coveralls/unshiftio/requires-port/master.svg?style=flat-square)](https://coveralls.io/r/unshiftio/requires-port?branch=master)[![IRC channel](http://img.shields.io/badge/IRC-irc.freenode.net%23unshift-00a8ff.svg?style=flat-square)](http://webchat.freenode.net/?channels=unshift) + +The module name says it all, check if a protocol requires a given port. + +## Installation + +This module is intended to be used with browserify or Node.js and is distributed +in the public npm registry. To install it simply run the following command from +your CLI: + +```j +npm install --save requires-port +``` + +## Usage + +The module exports it self as function and requires 2 arguments: + +1. The port number, can be a string or number. +2. Protocol, can be `http`, `http:` or even `https://yomoma.com`. We just split + it at `:` and use the first result. We currently accept the following + protocols: + - `http` + - `https` + - `ws` + - `wss` + - `ftp` + - `gopher` + - `file` + +It returns a boolean that indicates if protocol requires this port to be added +to your URL. + +```js +'use strict'; + +var required = require('requires-port'); + +console.log(required('8080', 'http')) // true +console.log(required('80', 'http')) // false +``` + +# License + +MIT diff --git a/node_modules/requires-port/index.js b/node_modules/requires-port/index.js new file mode 100644 index 00000000..4f267b26 --- /dev/null +++ b/node_modules/requires-port/index.js @@ -0,0 +1,38 @@ +'use strict'; + +/** + * Check if we're required to add a port number. + * + * @see https://url.spec.whatwg.org/#default-port + * @param {Number|String} port Port number we need to check + * @param {String} protocol Protocol we need to check against. + * @returns {Boolean} Is it a default port for the given protocol + * @api private + */ +module.exports = function required(port, protocol) { + protocol = protocol.split(':')[0]; + port = +port; + + if (!port) return false; + + switch (protocol) { + case 'http': + case 'ws': + return port !== 80; + + case 'https': + case 'wss': + return port !== 443; + + case 'ftp': + return port !== 21; + + case 'gopher': + return port !== 70; + + case 'file': + return false; + } + + return port !== 0; +}; diff --git a/node_modules/requires-port/package.json b/node_modules/requires-port/package.json new file mode 100644 index 00000000..c113b4bf --- /dev/null +++ b/node_modules/requires-port/package.json @@ -0,0 +1,47 @@ +{ + "name": "requires-port", + "version": "1.0.0", + "description": "Check if a protocol requires a certain port number to be added to an URL.", + "main": "index.js", + "scripts": { + "100%": "istanbul check-coverage --statements 100 --functions 100 --lines 100 --branches 100", + "test-travis": "istanbul cover _mocha --report lcovonly -- test.js", + "coverage": "istanbul cover _mocha -- test.js", + "watch": "mocha --watch test.js", + "test": "mocha test.js" + }, + "repository": { + "type": "git", + "url": "https://github.com/unshiftio/requires-port" + }, + "keywords": [ + "port", + "require", + "http", + "https", + "ws", + "wss", + "gopher", + "file", + "ftp", + "requires", + "requried", + "portnumber", + "url", + "parsing", + "validation", + "cows" + ], + "author": "Arnout Kazemier", + "license": "MIT", + "bugs": { + "url": "https://github.com/unshiftio/requires-port/issues" + }, + "homepage": "https://github.com/unshiftio/requires-port", + "devDependencies": { + "assume": "1.3.x", + "istanbul": "0.4.x", + "mocha": "2.3.x", + "pre-commit": "1.1.x" + } +} diff --git a/node_modules/requires-port/test.js b/node_modules/requires-port/test.js new file mode 100644 index 00000000..93a0c749 --- /dev/null +++ b/node_modules/requires-port/test.js @@ -0,0 +1,98 @@ +describe('requires-port', function () { + 'use strict'; + + var assume = require('assume') + , required = require('./'); + + it('is exported as a function', function () { + assume(required).is.a('function'); + }); + + it('does not require empty ports', function () { + assume(required('', 'http')).false(); + assume(required('', 'wss')).false(); + assume(required('', 'ws')).false(); + assume(required('', 'cowsack')).false(); + }); + + it('assumes true for unknown protocols',function () { + assume(required('808', 'foo')).true(); + assume(required('80', 'bar')).true(); + }); + + it('never requires port numbers for file', function () { + assume(required(8080, 'file')).false(); + }); + + it('does not require port 80 for http', function () { + assume(required('80', 'http')).false(); + assume(required(80, 'http')).false(); + assume(required(80, 'http://')).false(); + assume(required(80, 'http://www.google.com')).false(); + + assume(required('8080', 'http')).true(); + assume(required(8080, 'http')).true(); + assume(required(8080, 'http://')).true(); + assume(required(8080, 'http://www.google.com')).true(); + }); + + it('does not require port 80 for ws', function () { + assume(required('80', 'ws')).false(); + assume(required(80, 'ws')).false(); + assume(required(80, 'ws://')).false(); + assume(required(80, 'ws://www.google.com')).false(); + + assume(required('8080', 'ws')).true(); + assume(required(8080, 'ws')).true(); + assume(required(8080, 'ws://')).true(); + assume(required(8080, 'ws://www.google.com')).true(); + }); + + it('does not require port 443 for https', function () { + assume(required('443', 'https')).false(); + assume(required(443, 'https')).false(); + assume(required(443, 'https://')).false(); + assume(required(443, 'https://www.google.com')).false(); + + assume(required('8080', 'https')).true(); + assume(required(8080, 'https')).true(); + assume(required(8080, 'https://')).true(); + assume(required(8080, 'https://www.google.com')).true(); + }); + + it('does not require port 443 for wss', function () { + assume(required('443', 'wss')).false(); + assume(required(443, 'wss')).false(); + assume(required(443, 'wss://')).false(); + assume(required(443, 'wss://www.google.com')).false(); + + assume(required('8080', 'wss')).true(); + assume(required(8080, 'wss')).true(); + assume(required(8080, 'wss://')).true(); + assume(required(8080, 'wss://www.google.com')).true(); + }); + + it('does not require port 21 for ftp', function () { + assume(required('21', 'ftp')).false(); + assume(required(21, 'ftp')).false(); + assume(required(21, 'ftp://')).false(); + assume(required(21, 'ftp://www.google.com')).false(); + + assume(required('8080', 'ftp')).true(); + assume(required(8080, 'ftp')).true(); + assume(required(8080, 'ftp://')).true(); + assume(required(8080, 'ftp://www.google.com')).true(); + }); + + it('does not require port 70 for gopher', function () { + assume(required('70', 'gopher')).false(); + assume(required(70, 'gopher')).false(); + assume(required(70, 'gopher://')).false(); + assume(required(70, 'gopher://www.google.com')).false(); + + assume(required('8080', 'gopher')).true(); + assume(required(8080, 'gopher')).true(); + assume(required(8080, 'gopher://')).true(); + assume(required(8080, 'gopher://www.google.com')).true(); + }); +}); diff --git a/node_modules/strnum/.vscode/launch.json b/node_modules/strnum/.vscode/launch.json new file mode 100644 index 00000000..b87b3491 --- /dev/null +++ b/node_modules/strnum/.vscode/launch.json @@ -0,0 +1,25 @@ +{ + "version": "0.2.0", + "configurations": [ + { + "type": "node", + "request": "launch", + "name": "Jasmine Tests", + "program": "${workspaceFolder}/node_modules/jasmine/bin/jasmine.js", + "args": [ + "${workspaceFolder}/spec/attr_spec.js" + ], + "internalConsoleOptions": "openOnSessionStart" + },{ + "type": "node", + "request": "launch", + "name": "Jasmine Tests current test file", + "program": "${workspaceFolder}/node_modules/jasmine/bin/jasmine.js", + "args": [ + "${file}" + ], + "internalConsoleOptions": "openOnSessionStart" + } + ] + +} \ No newline at end of file diff --git a/node_modules/strnum/CHANGELOG.md b/node_modules/strnum/CHANGELOG.md new file mode 100644 index 00000000..582e4604 --- /dev/null +++ b/node_modules/strnum/CHANGELOG.md @@ -0,0 +1,22 @@ + +**1.1.2 / 2025-02-27** +- fix skiplike for 0 + +**1.1.1 / 2025-02-21** +- All recent fixes of version 2 + +**2.0.4 / 2025-02-20** +- remove console log + +**2.0.3 / 2025-02-20** +- fix for string which are falsly identified as e-notation + +**2.0.1 / 2025-02-20** +- fix: handle only zeros +- fix: return original string when NaN + +**2.0.0 / 2025-02-20** +- Migrating to ESM modules. No functional change + +**1.1.0 / 2025-02-20** +- fix (#9): support missing floating point and e notations \ No newline at end of file diff --git a/node_modules/strnum/LICENSE b/node_modules/strnum/LICENSE new file mode 100644 index 00000000..64505544 --- /dev/null +++ b/node_modules/strnum/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2021 Natural Intelligence + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/node_modules/strnum/README.md b/node_modules/strnum/README.md new file mode 100644 index 00000000..419e8ef9 --- /dev/null +++ b/node_modules/strnum/README.md @@ -0,0 +1,97 @@ +# strnum +Parse string into Number based on configuration + +## Users + + + + + +Many React Native projects and plugins + +## Usage + +```bash +npm install strnum +``` +```js +const toNumber = require("strnum"); + +toNumber(undefined) // undefined +toNumber(null)) //null +toNumber("")) // "" +toNumber("string"); //"string") +toNumber("12,12"); //"12,12") +toNumber("12 12"); //"12 12") +toNumber("12-12"); //"12-12") +toNumber("12.12.12"); //"12.12.12") +toNumber("0x2f"); //47) +toNumber("-0x2f"); //-47) +toNumber("0x2f", { hex : true}); //47) +toNumber("-0x2f", { hex : true}); //-47) +toNumber("0x2f", { hex : false}); //"0x2f") +toNumber("-0x2f", { hex : false}); //"-0x2f") +toNumber("06"); //6) +toNumber("06", { leadingZeros : true}); //6) +toNumber("06", { leadingZeros : false}); //"06") + +toNumber("006"); //6) +toNumber("006", { leadingZeros : true}); //6) +toNumber("006", { leadingZeros : false}); //"006") +toNumber("0.0"); //0) +toNumber("00.00"); //0) +toNumber("0.06"); //0.06) +toNumber("00.6"); //0.6) +toNumber(".006"); //0.006) +toNumber("6.0"); //6) +toNumber("06.0"); //6) + +toNumber("0.0", { leadingZeros : false}); //0) +toNumber("00.00", { leadingZeros : false}); //"00.00") +toNumber("0.06", { leadingZeros : false}); //0.06) +toNumber("00.6", { leadingZeros : false}); //"00.6") +toNumber(".006", { leadingZeros : false}); //0.006) +toNumber("6.0" , { leadingZeros : false}); //6) +toNumber("06.0" , { leadingZeros : false}); //"06.0") +toNumber("-06"); //-6) +toNumber("-06", { leadingZeros : true}); //-6) +toNumber("-06", { leadingZeros : false}); //"-06") + +toNumber("-0.0"); //-0) +toNumber("-00.00"); //-0) +toNumber("-0.06"); //-0.06) +toNumber("-00.6"); //-0.6) +toNumber("-.006"); //-0.006) +toNumber("-6.0"); //-6) +toNumber("-06.0"); //-6) + +toNumber("-0.0" , { leadingZeros : false}); //-0) +toNumber("-00.00", { leadingZeros : false}); //"-00.00") +toNumber("-0.06", { leadingZeros : false}); //-0.06) +toNumber("-00.6", { leadingZeros : false}); //"-00.6") +toNumber("-.006", {leadingZeros : false}); //-0.006) +toNumber("-6.0" , { leadingZeros : false}); //-6) +toNumber("-06.0" , { leadingZeros : false}); //"-06.0") +toNumber("420926189200190257681175017717") ; //4.209261892001902e+29) +toNumber("000000000000000000000000017717" , { leadingZeros : false}); //"000000000000000000000000017717") +toNumber("000000000000000000000000017717" , { leadingZeros : true}); //17717) +toNumber("01.0e2" , { leadingZeros : false}); //"01.0e2") +toNumber("-01.0e2" , { leadingZeros : false}); //"-01.0e2") +toNumber("01.0e2") ; //100) +toNumber("-01.0e2") ; //-100) +toNumber("1.0e2") ; //100) + +toNumber("-1.0e2") ; //-100) +toNumber("1.0e-2"); //0.01) + +toNumber("+1212121212"); // 1212121212 +toNumber("+1212121212", { skipLike: /\+[0-9]{10}/} )); //"+1212121212" +``` + +Supported Options +```js +hex: true, //when hexadecimal string should be parsed +leadingZeros: true, //when number with leading zeros like 08 should be parsed. 0.0 is not impacted +eNotation: true, //when number with eNotation or number parsed in eNotation should be considered +skipLike: /regex/ //when string should not be parsed when it matches the specified regular expression +``` diff --git a/node_modules/strnum/package.json b/node_modules/strnum/package.json new file mode 100644 index 00000000..90a1b963 --- /dev/null +++ b/node_modules/strnum/package.json @@ -0,0 +1,30 @@ +{ + "name": "strnum", + "version": "1.1.2", + "description": "Parse String to Number based on configuration", + "main": "strnum.js", + "scripts": { + "test": "jasmine strnum.test.js" + }, + "keywords": [ + "string", + "number", + "parse", + "convert" + ], + "repository": { + "type": "git", + "url": "https://github.com/NaturalIntelligence/strnum" + }, + "author": "Amit Gupta (https://amitkumargupta.work/)", + "license": "MIT", + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/NaturalIntelligence" + } + ], + "devDependencies": { + "jasmine": "^5.6.0" + } +} diff --git a/node_modules/strnum/strnum.js b/node_modules/strnum/strnum.js new file mode 100644 index 00000000..c3bd08e2 --- /dev/null +++ b/node_modules/strnum/strnum.js @@ -0,0 +1,111 @@ +const hexRegex = /^[-+]?0x[a-fA-F0-9]+$/; +const numRegex = /^([\-\+])?(0*)([0-9]*(\.[0-9]*)?)$/; +// const octRegex = /^0x[a-z0-9]+/; +// const binRegex = /0x[a-z0-9]+/; + + +const consider = { + hex : true, + // oct: false, + leadingZeros: true, + decimalPoint: "\.", + eNotation: true, + //skipLike: /regex/ +}; + +function toNumber(str, options = {}){ + options = Object.assign({}, consider, options ); + if(!str || typeof str !== "string" ) return str; + + let trimmedStr = str.trim(); + + if(options.skipLike !== undefined && options.skipLike.test(trimmedStr)) return str; + else if(str==="0") return 0; + else if (options.hex && hexRegex.test(trimmedStr)) { + return parse_int(trimmedStr, 16); + // }else if (options.oct && octRegex.test(str)) { + // return Number.parseInt(val, 8); + }else if (trimmedStr.search(/[eE]/)!== -1) { //eNotation + const notation = trimmedStr.match(/^([-\+])?(0*)([0-9]*(\.[0-9]*)?[eE][-\+]?[0-9]+)$/); + // +00.123 => [ , '+', '00', '.123', .. + if(notation){ + // console.log(notation) + if(options.leadingZeros){ //accept with leading zeros + trimmedStr = (notation[1] || "") + notation[3]; + }else{ + if(notation[2] === "0" && notation[3][0]=== "."){ //valid number + }else{ + return str; + } + } + return options.eNotation ? Number(trimmedStr) : str; + }else{ + return str; + } + // }else if (options.parseBin && binRegex.test(str)) { + // return Number.parseInt(val, 2); + }else{ + //separate negative sign, leading zeros, and rest number + const match = numRegex.exec(trimmedStr); + // +00.123 => [ , '+', '00', '.123', .. + if(match){ + const sign = match[1]; + const leadingZeros = match[2]; + let numTrimmedByZeros = trimZeros(match[3]); //complete num without leading zeros + //trim ending zeros for floating number + + if(!options.leadingZeros && leadingZeros.length > 0 && sign && trimmedStr[2] !== ".") return str; //-0123 + else if(!options.leadingZeros && leadingZeros.length > 0 && !sign && trimmedStr[1] !== ".") return str; //0123 + else if(options.leadingZeros && leadingZeros===str) return 0; //00 + + else{//no leading zeros or leading zeros are allowed + const num = Number(trimmedStr); + const numStr = "" + num; + + if(numStr.search(/[eE]/) !== -1){ //given number is long and parsed to eNotation + if(options.eNotation) return num; + else return str; + }else if(trimmedStr.indexOf(".") !== -1){ //floating number + if(numStr === "0" && (numTrimmedByZeros === "") ) return num; //0.0 + else if(numStr === numTrimmedByZeros) return num; //0.456. 0.79000 + else if( sign && numStr === "-"+numTrimmedByZeros) return num; + else return str; + } + + if(leadingZeros){ + return (numTrimmedByZeros === numStr) || (sign+numTrimmedByZeros === numStr) ? num : str + }else { + return (trimmedStr === numStr) || (trimmedStr === sign+numStr) ? num : str + } + } + }else{ //non-numeric string + return str; + } + } +} + +/** + * + * @param {string} numStr without leading zeros + * @returns + */ +function trimZeros(numStr){ + if(numStr && numStr.indexOf(".") !== -1){//float + numStr = numStr.replace(/0+$/, ""); //remove ending zeros + if(numStr === ".") numStr = "0"; + else if(numStr[0] === ".") numStr = "0"+numStr; + else if(numStr[numStr.length-1] === ".") numStr = numStr.substr(0,numStr.length-1); + return numStr; + } + return numStr; +} + +function parse_int(numStr, base){ + //polyfill + if(parseInt) return parseInt(numStr, base); + else if(Number.parseInt) return Number.parseInt(numStr, base); + else if(window && window.parseInt) return window.parseInt(numStr, base); + else throw new Error("parseInt, Number.parseInt, window.parseInt are not supported") +} + +module.exports = toNumber; \ No newline at end of file diff --git a/node_modules/strnum/strnum.test.js b/node_modules/strnum/strnum.test.js new file mode 100644 index 00000000..c4766144 --- /dev/null +++ b/node_modules/strnum/strnum.test.js @@ -0,0 +1,165 @@ +const toNumber = require("./strnum.js"); + +describe("Should convert all the valid numeric strings to number", () => { + it("should return undefined, null, empty string, or non-numeric as it is", () => { + expect(toNumber(undefined)).not.toBeDefined(); + expect(toNumber(null)).toEqual(null); + expect(toNumber("")).toEqual(""); + expect(toNumber("string")).toEqual("string"); + expect(toNumber("e89794659669cb7bb967db73a7ea6889c3891727")).toEqual("e89794659669cb7bb967db73a7ea6889c3891727"); + + }); + it("should not parse number with spaces or comma", () => { + expect(toNumber("12,12")).toEqual("12,12"); + expect(toNumber("12 12")).toEqual("12 12"); + expect(toNumber("12-12")).toEqual("12-12"); + expect(toNumber("12.12.12")).toEqual("12.12.12"); + }) + it("should consider + sign", () => { + expect(toNumber("+12")).toEqual(12); + expect(toNumber("+ 12")).toEqual("+ 12"); + expect(toNumber("12+12")).toEqual("12+12"); + expect(toNumber("1212+")).toEqual("1212+"); + }) + it("should parse hexadecimal values", () => { + expect(toNumber("0x2f")).toEqual(47); + expect(toNumber("-0x2f")).toEqual(-47); + expect(toNumber("0x2f", { hex : true})).toEqual(47); + expect(toNumber("-0x2f", { hex : true})).toEqual(-47); + expect(toNumber("0x2f", { hex : false})).toEqual("0x2f"); + expect(toNumber("-0x2f", { hex : false})).toEqual("-0x2f"); + }) + it("should not parse strings with 0x embedded", () => { + expect(toNumber("0xzz")).toEqual("0xzz"); + expect(toNumber("iweraf0x123qwerqwer")).toEqual("iweraf0x123qwerqwer"); + expect(toNumber("1230x55")).toEqual("1230x55"); + expect(toNumber("JVBERi0xLjMNCiXi48")).toEqual("JVBERi0xLjMNCiXi48"); + }) + it("leading zeros", () => { + expect(toNumber("0")).toEqual(0); + expect(toNumber("00")).toEqual(0); + expect(toNumber("00.0")).toEqual(0); + + expect(toNumber("0",{ leadingZeros : false})).toEqual(0); + expect(toNumber("00",{ leadingZeros : false})).toEqual("00"); + expect(toNumber("00.0",{ leadingZeros : false})).toEqual("00.0"); + + expect(toNumber("06")).toEqual(6); + expect(toNumber("06", { leadingZeros : true})).toEqual(6); + expect(toNumber("06", { leadingZeros : false})).toEqual("06"); + + expect(toNumber("006")).toEqual(6); + expect(toNumber("006", { leadingZeros : true})).toEqual(6); + expect(toNumber("006", { leadingZeros : false})).toEqual("006"); + + expect(toNumber("000000000000000000000000017717" , { leadingZeros : false})).toEqual("000000000000000000000000017717"); + expect(toNumber("000000000000000000000000017717" , { leadingZeros : true})).toEqual(17717); + expect(toNumber("020211201030005811824") ).toEqual("020211201030005811824"); + expect(toNumber("0420926189200190257681175017717") ).toEqual(4.209261892001902e+29); + }) + it("invalid floating number", () => { + expect(toNumber("20.21.030") ).toEqual("20.21.030"); + expect(toNumber("0.21.030") ).toEqual("0.21.030"); + expect(toNumber("0.21.") ).toEqual("0.21."); + }); + it("floating point and leading zeros", () => { + expect(toNumber("0.")).toEqual(0); + expect(toNumber("+0.")).toEqual(0); + expect(toNumber("-0.")).toEqual(-0); + expect(toNumber("1.") ).toEqual(1); + expect(toNumber("00.00")).toEqual(0); + expect(toNumber("0.06")).toEqual(0.06); + expect(toNumber("00.6")).toEqual(0.6); + expect(toNumber(".006")).toEqual(0.006); + expect(toNumber("6.0")).toEqual(6); + expect(toNumber("06.0")).toEqual(6); + + expect(toNumber("0.0", { leadingZeros : false})).toEqual(0); + expect(toNumber("00.00", { leadingZeros : false})).toEqual("00.00"); + expect(toNumber("0.06", { leadingZeros : false})).toEqual(0.06); + expect(toNumber("00.6", { leadingZeros : false})).toEqual("00.6"); + expect(toNumber(".006", { leadingZeros : false})).toEqual(0.006); + expect(toNumber("6.0" , { leadingZeros : false})).toEqual(6); + expect(toNumber("06.0" , { leadingZeros : false})).toEqual("06.0"); + }) + it("negative number leading zeros", () => { + expect(toNumber("+06")).toEqual(6); + expect(toNumber("-06")).toEqual(-6); + expect(toNumber("-06", { leadingZeros : true})).toEqual(-6); + expect(toNumber("-06", { leadingZeros : false})).toEqual("-06"); + + expect(toNumber("-0.0")).toEqual(-0); + expect(toNumber("-00.00")).toEqual(-0); + expect(toNumber("-0.06")).toEqual(-0.06); + expect(toNumber("-00.6")).toEqual(-0.6); + expect(toNumber("-.006")).toEqual(-0.006); + expect(toNumber("-6.0")).toEqual(-6); + expect(toNumber("-06.0")).toEqual(-6); + + expect(toNumber("-0.0" , { leadingZeros : false})).toEqual(-0); + expect(toNumber("-00.00", { leadingZeros : false})).toEqual("-00.00"); + expect(toNumber("-0.06", { leadingZeros : false})).toEqual(-0.06); + expect(toNumber("-00.6", { leadingZeros : false})).toEqual("-00.6"); + expect(toNumber("-.006", {leadingZeros : false})).toEqual(-0.006); + expect(toNumber("-6.0" , { leadingZeros : false})).toEqual(-6); + expect(toNumber("-06.0" , { leadingZeros : false})).toEqual("-06.0"); + }) + it("long number", () => { + expect(toNumber("020211201030005811824") ).toEqual("020211201030005811824"); + expect(toNumber("20211201030005811824") ).toEqual("20211201030005811824"); + expect(toNumber("20.211201030005811824") ).toEqual("20.211201030005811824"); + expect(toNumber("0.211201030005811824") ).toEqual("0.211201030005811824"); + }); + it("scientific notation", () => { + expect(toNumber("01.0e2" , { leadingZeros : false})).toEqual("01.0e2"); + expect(toNumber("-01.0e2" , { leadingZeros : false})).toEqual("-01.0e2"); + expect(toNumber("01.0e2") ).toEqual(100); + expect(toNumber("-01.0e2") ).toEqual(-100); + expect(toNumber("1.0e2") ).toEqual(100); + + expect(toNumber("-1.0e2") ).toEqual(-100); + expect(toNumber("1.0e-2")).toEqual(0.01); + + expect(toNumber("420926189200190257681175017717") ).toEqual(4.209261892001902e+29); + expect(toNumber("420926189200190257681175017717" , { eNotation: false} )).toEqual("420926189200190257681175017717"); + + expect(toNumber("1e-2")).toEqual(0.01); + expect(toNumber("1e+2")).toEqual(100); + expect(toNumber("1.e+2")).toEqual(100); + }); + + it("scientific notation with upper E", () => { + expect(toNumber("01.0E2" , { leadingZeros : false})).toEqual("01.0E2"); + expect(toNumber("-01.0E2" , { leadingZeros : false})).toEqual("-01.0E2"); + expect(toNumber("01.0E2") ).toEqual(100); + expect(toNumber("-01.0E2") ).toEqual(-100); + expect(toNumber("1.0E2") ).toEqual(100); + + expect(toNumber("-1.0E2") ).toEqual(-100); + expect(toNumber("1.0E-2")).toEqual(0.01); + }); + + it("should skip matching pattern", () => { + expect(toNumber("0", { skipLike: /.*/ })).toEqual("0"); + expect(toNumber("+12", { skipLike: /\+[0-9]{10}/} )).toEqual(12); + expect(toNumber("12+12", { skipLike: /\+[0-9]{10}/} )).toEqual("12+12"); + expect(toNumber("12+1212121212", { skipLike: /\+[0-9]{10}/} )).toEqual("12+1212121212"); + expect(toNumber("+1212121212") ).toEqual(1212121212); + expect(toNumber("+1212121212", { skipLike: /\+[0-9]{10}/} )).toEqual("+1212121212"); + }) + it("should not change string if not number", () => { + expect(toNumber("+12 12")).toEqual("+12 12"); + expect(toNumber(" +12 12 ")).toEqual(" +12 12 "); + }) + it("should ignore sorrounded spaces ", () => { + expect(toNumber(" +1212 ")).toEqual(1212); + }) + + it("negative numbers", () => { + expect(toNumber("+1212")).toEqual(1212); + expect(toNumber("+12.12")).toEqual(12.12); + expect(toNumber("-12.12")).toEqual(-12.12); + expect(toNumber("-012.12")).toEqual(-12.12); + expect(toNumber("-012.12")).toEqual(-12.12); + }) +}); diff --git a/node_modules/url-join/LICENSE b/node_modules/url-join/LICENSE new file mode 100644 index 00000000..4c2ef041 --- /dev/null +++ b/node_modules/url-join/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2015 José F. Romaniello + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/node_modules/url-join/README.md b/node_modules/url-join/README.md new file mode 100644 index 00000000..b024446b --- /dev/null +++ b/node_modules/url-join/README.md @@ -0,0 +1,29 @@ +Join all arguments together and normalize the resulting URL. + +## Install + +```bash +npm install url-join +``` + +If you want to use it directly in a browser use a CDN like [Skypack](https://www.skypack.dev/view/url-join). + +## Usage + +```javascript +import urlJoin from 'url-join'; + +const fullUrl = urlJoin('http://www.google.com', 'a', '/b/cd', '?foo=123'); + +console.log(fullUrl); +``` + +Prints: + +``` +'http://www.google.com/a/b/cd?foo=123' +``` + +## License + +MIT diff --git a/node_modules/url-join/lib/url-join.d.ts b/node_modules/url-join/lib/url-join.d.ts new file mode 100644 index 00000000..317c2ba5 --- /dev/null +++ b/node_modules/url-join/lib/url-join.d.ts @@ -0,0 +1,9 @@ +/** + * Join all arguments together and normalize the resulting url. + * This works similar to `path.join` but you shouldn't use `path.join` for urls since it works + * differently depending on the operating system and also doesn't work for some cases. + */ +declare function urlJoin(...parts: string[]): string; +declare function urlJoin(parts: string[]): string; + +export default urlJoin; diff --git a/node_modules/url-join/lib/url-join.js b/node_modules/url-join/lib/url-join.js new file mode 100644 index 00000000..37f13035 --- /dev/null +++ b/node_modules/url-join/lib/url-join.js @@ -0,0 +1,70 @@ +function normalize (strArray) { + var resultArray = []; + if (strArray.length === 0) { return ''; } + + if (typeof strArray[0] !== 'string') { + throw new TypeError('Url must be a string. Received ' + strArray[0]); + } + + // If the first part is a plain protocol, we combine it with the next part. + if (strArray[0].match(/^[^/:]+:\/*$/) && strArray.length > 1) { + var first = strArray.shift(); + strArray[0] = first + strArray[0]; + } + + // There must be two or three slashes in the file protocol, two slashes in anything else. + if (strArray[0].match(/^file:\/\/\//)) { + strArray[0] = strArray[0].replace(/^([^/:]+):\/*/, '$1:///'); + } else { + strArray[0] = strArray[0].replace(/^([^/:]+):\/*/, '$1://'); + } + + for (var i = 0; i < strArray.length; i++) { + var component = strArray[i]; + + if (typeof component !== 'string') { + throw new TypeError('Url must be a string. Received ' + component); + } + + if (component === '') { continue; } + + if (i > 0) { + // Removing the starting slashes for each component but the first. + component = component.replace(/^[\/]+/, ''); + } + if (i < strArray.length - 1) { + // Removing the ending slashes for each component but the last. + component = component.replace(/[\/]+$/, ''); + } else { + // For the last component we will combine multiple slashes to a single one. + component = component.replace(/[\/]+$/, '/'); + } + + resultArray.push(component); + + } + + var str = resultArray.join('/'); + // Each input component is now separated by a single slash except the possible first plain protocol part. + + // remove trailing slash before parameters or hash + str = str.replace(/\/(\?|&|#[^!])/g, '$1'); + + // replace ? in parameters with & + var parts = str.split('?'); + str = parts.shift() + (parts.length > 0 ? '?': '') + parts.join('&'); + + return str; +} + +export default function urlJoin() { + var input; + + if (typeof arguments[0] === 'object') { + input = arguments[0]; + } else { + input = [].slice.call(arguments); + } + + return normalize(input); +} diff --git a/node_modules/url-join/package.json b/node_modules/url-join/package.json new file mode 100644 index 00000000..56e30480 --- /dev/null +++ b/node_modules/url-join/package.json @@ -0,0 +1,34 @@ +{ + "name": "url-join", + "version": "5.0.0", + "description": "Join urls and normalize as in path.join.", + "type": "module", + "main": "./lib/url-join.js", + "exports": "./lib/url-join.js", + "types": "./lib/url-join.d.ts", + "sideEffects": false, + "engines": { + "node": "^12.20.0 || ^14.13.1 || >=16.0.0" + }, + "scripts": { + "test": "mocha --require should" + }, + "files": [ + "lib" + ], + "repository": { + "type": "git", + "url": "git://github.com/jfromaniello/url-join.git" + }, + "keywords": [ + "url", + "join" + ], + "author": "José F. Romaniello (http://joseoncode.com)", + "license": "MIT", + "devDependencies": { + "conventional-changelog": "^3.1.25", + "mocha": "^9.2.2", + "should": "~13.2.3" + } +} diff --git a/node_modules/url-parse/LICENSE b/node_modules/url-parse/LICENSE new file mode 100644 index 00000000..6dc9316a --- /dev/null +++ b/node_modules/url-parse/LICENSE @@ -0,0 +1,22 @@ +The MIT License (MIT) + +Copyright (c) 2015 Unshift.io, Arnout Kazemier, the Contributors. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. + diff --git a/node_modules/url-parse/README.md b/node_modules/url-parse/README.md new file mode 100644 index 00000000..e5bf8d7c --- /dev/null +++ b/node_modules/url-parse/README.md @@ -0,0 +1,153 @@ +# url-parse + +[![Version npm](https://img.shields.io/npm/v/url-parse.svg?style=flat-square)](https://www.npmjs.com/package/url-parse)[![Build Status](https://img.shields.io/github/workflow/status/unshiftio/url-parse/CI/master?label=CI&style=flat-square)](https://github.com/unshiftio/url-parse/actions?query=workflow%3ACI+branch%3Amaster)[![Coverage Status](https://img.shields.io/coveralls/unshiftio/url-parse/master.svg?style=flat-square)](https://coveralls.io/r/unshiftio/url-parse?branch=master) + +[![Sauce Test Status](https://saucelabs.com/browser-matrix/url-parse.svg)](https://saucelabs.com/u/url-parse) + +**`url-parse` was created in 2014 when the WHATWG URL API was not available in +Node.js and the `URL` interface was supported only in some browsers. Today this +is no longer true. The `URL` interface is available in all supported Node.js +release lines and basically all browsers. Consider using it for better security +and accuracy.** + +The `url-parse` method exposes two different API interfaces. The +[`url`](https://nodejs.org/api/url.html) interface that you know from Node.js +and the new [`URL`](https://developer.mozilla.org/en-US/docs/Web/API/URL/URL) +interface that is available in the latest browsers. + +In version `0.1` we moved from a DOM based parsing solution, using the `` +element, to a full Regular Expression solution. The main reason for this was +to make the URL parser available in different JavaScript environments as you +don't always have access to the DOM. An example of such environment is the +[`Worker`](https://developer.mozilla.org/en/docs/Web/API/Worker) interface. +The RegExp based solution didn't work well as it required a lot of lookups +causing major problems in FireFox. In version `1.0.0` we ditched the RegExp +based solution in favor of a pure string parsing solution which chops up the +URL into smaller pieces. This module still has a really small footprint as it +has been designed to be used on the client side. + +In addition to URL parsing we also expose the bundled `querystringify` module. + +## Installation + +This module is designed to be used using either browserify or Node.js it's +released in the public npm registry and can be installed using: + +``` +npm install url-parse +``` + +## Usage + +All examples assume that this library is bootstrapped using: + +```js +'use strict'; + +var Url = require('url-parse'); +``` + +To parse an URL simply call the `URL` method with the URL that needs to be +transformed into an object. + +```js +var url = new Url('https://github.com/foo/bar'); +``` + +The `new` keyword is optional but it will save you an extra function invocation. +The constructor takes the following arguments: + +- `url` (`String`): A string representing an absolute or relative URL. +- `baseURL` (`Object` | `String`): An object or string representing + the base URL to use in case `url` is a relative URL. This argument is + optional and defaults to [`location`](https://developer.mozilla.org/en-US/docs/Web/API/Location) + in the browser. +- `parser` (`Boolean` | `Function`): This argument is optional and specifies + how to parse the query string. By default it is `false` so the query string + is not parsed. If you pass `true` the query string is parsed using the + embedded `querystringify` module. If you pass a function the query string + will be parsed using this function. + +As said above we also support the Node.js interface so you can also use the +library in this way: + +```js +'use strict'; + +var parse = require('url-parse') + , url = parse('https://github.com/foo/bar', true); +``` + +The returned `url` instance contains the following properties: + +- `protocol`: The protocol scheme of the URL (e.g. `http:`). +- `slashes`: A boolean which indicates whether the `protocol` is followed by two + forward slashes (`//`). +- `auth`: Authentication information portion (e.g. `username:password`). +- `username`: Username of basic authentication. +- `password`: Password of basic authentication. +- `host`: Host name with port number. The hostname might be invalid. +- `hostname`: Host name without port number. This might be an invalid hostname. +- `port`: Optional port number. +- `pathname`: URL path. +- `query`: Parsed object containing query string, unless parsing is set to false. +- `hash`: The "fragment" portion of the URL including the pound-sign (`#`). +- `href`: The full URL. +- `origin`: The origin of the URL. + +Note that when `url-parse` is used in a browser environment, it will default to +using the browser's current window location as the base URL when parsing all +inputs. To parse an input independently of the browser's current URL (e.g. for +functionality parity with the library in a Node environment), pass an empty +location object as the second parameter: + +```js +var parse = require('url-parse'); +parse('hostname', {}); +``` + +### Url.set(key, value) + +A simple helper function to change parts of the URL and propagating it through +all properties. When you set a new `host` you want the same value to be applied +to `port` if has a different port number, `hostname` so it has a correct name +again and `href` so you have a complete URL. + +```js +var parsed = parse('http://google.com/parse-things'); + +parsed.set('hostname', 'yahoo.com'); +console.log(parsed.href); // http://yahoo.com/parse-things +``` + +It's aware of default ports so you cannot set a port 80 on an URL which has +`http` as protocol. + +### Url.toString() + +The returned `url` object comes with a custom `toString` method which will +generate a full URL again when called. The method accepts an extra function +which will stringify the query string for you. If you don't supply a function we +will use our default method. + +```js +var location = url.toString(); // http://example.com/whatever/?qs=32 +``` + +You would rarely need to use this method as the full URL is also available as +`href` property. If you are using the `URL.set` method to make changes, this +will automatically update. + +## Testing + +The testing of this module is done in 3 different ways: + +1. We have unit tests that run under Node.js. You can run these tests with the + `npm test` command. +2. Code coverage can be run manually using `npm run coverage`. +3. For browser testing we use Sauce Labs and `zuul`. You can run browser tests + using the `npm run test-browser` command. + +## License + +[MIT](LICENSE) diff --git a/node_modules/url-parse/dist/url-parse.js b/node_modules/url-parse/dist/url-parse.js new file mode 100644 index 00000000..e9891938 --- /dev/null +++ b/node_modules/url-parse/dist/url-parse.js @@ -0,0 +1,755 @@ +(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.URLParse = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i= 2) { + rest = rest.slice(2); + } + } else if (isSpecial(protocol)) { + rest = match[4]; + } else if (protocol) { + if (forwardSlashes) { + rest = rest.slice(2); + } + } else if (slashesCount >= 2 && isSpecial(location.protocol)) { + rest = match[4]; + } + + return { + protocol: protocol, + slashes: forwardSlashes || isSpecial(protocol), + slashesCount: slashesCount, + rest: rest + }; +} + +/** + * Resolve a relative URL pathname against a base URL pathname. + * + * @param {String} relative Pathname of the relative URL. + * @param {String} base Pathname of the base URL. + * @return {String} Resolved pathname. + * @private + */ +function resolve(relative, base) { + if (relative === '') return base; + + var path = (base || '/').split('/').slice(0, -1).concat(relative.split('/')) + , i = path.length + , last = path[i - 1] + , unshift = false + , up = 0; + + while (i--) { + if (path[i] === '.') { + path.splice(i, 1); + } else if (path[i] === '..') { + path.splice(i, 1); + up++; + } else if (up) { + if (i === 0) unshift = true; + path.splice(i, 1); + up--; + } + } + + if (unshift) path.unshift(''); + if (last === '.' || last === '..') path.push(''); + + return path.join('/'); +} + +/** + * The actual URL instance. Instead of returning an object we've opted-in to + * create an actual constructor as it's much more memory efficient and + * faster and it pleases my OCD. + * + * It is worth noting that we should not use `URL` as class name to prevent + * clashes with the global URL instance that got introduced in browsers. + * + * @constructor + * @param {String} address URL we want to parse. + * @param {Object|String} [location] Location defaults for relative paths. + * @param {Boolean|Function} [parser] Parser for the query string. + * @private + */ +function Url(address, location, parser) { + address = trimLeft(address); + address = address.replace(CRHTLF, ''); + + if (!(this instanceof Url)) { + return new Url(address, location, parser); + } + + var relative, extracted, parse, instruction, index, key + , instructions = rules.slice() + , type = typeof location + , url = this + , i = 0; + + // + // The following if statements allows this module two have compatibility with + // 2 different API: + // + // 1. Node.js's `url.parse` api which accepts a URL, boolean as arguments + // where the boolean indicates that the query string should also be parsed. + // + // 2. The `URL` interface of the browser which accepts a URL, object as + // arguments. The supplied object will be used as default values / fall-back + // for relative paths. + // + if ('object' !== type && 'string' !== type) { + parser = location; + location = null; + } + + if (parser && 'function' !== typeof parser) parser = qs.parse; + + location = lolcation(location); + + // + // Extract protocol information before running the instructions. + // + extracted = extractProtocol(address || '', location); + relative = !extracted.protocol && !extracted.slashes; + url.slashes = extracted.slashes || relative && location.slashes; + url.protocol = extracted.protocol || location.protocol || ''; + address = extracted.rest; + + // + // When the authority component is absent the URL starts with a path + // component. + // + if ( + extracted.protocol === 'file:' && ( + extracted.slashesCount !== 2 || windowsDriveLetter.test(address)) || + (!extracted.slashes && + (extracted.protocol || + extracted.slashesCount < 2 || + !isSpecial(url.protocol))) + ) { + instructions[3] = [/(.*)/, 'pathname']; + } + + for (; i < instructions.length; i++) { + instruction = instructions[i]; + + if (typeof instruction === 'function') { + address = instruction(address, url); + continue; + } + + parse = instruction[0]; + key = instruction[1]; + + if (parse !== parse) { + url[key] = address; + } else if ('string' === typeof parse) { + index = parse === '@' + ? address.lastIndexOf(parse) + : address.indexOf(parse); + + if (~index) { + if ('number' === typeof instruction[2]) { + url[key] = address.slice(0, index); + address = address.slice(index + instruction[2]); + } else { + url[key] = address.slice(index); + address = address.slice(0, index); + } + } + } else if ((index = parse.exec(address))) { + url[key] = index[1]; + address = address.slice(0, index.index); + } + + url[key] = url[key] || ( + relative && instruction[3] ? location[key] || '' : '' + ); + + // + // Hostname, host and protocol should be lowercased so they can be used to + // create a proper `origin`. + // + if (instruction[4]) url[key] = url[key].toLowerCase(); + } + + // + // Also parse the supplied query string in to an object. If we're supplied + // with a custom parser as function use that instead of the default build-in + // parser. + // + if (parser) url.query = parser(url.query); + + // + // If the URL is relative, resolve the pathname against the base URL. + // + if ( + relative + && location.slashes + && url.pathname.charAt(0) !== '/' + && (url.pathname !== '' || location.pathname !== '') + ) { + url.pathname = resolve(url.pathname, location.pathname); + } + + // + // Default to a / for pathname if none exists. This normalizes the URL + // to always have a / + // + if (url.pathname.charAt(0) !== '/' && isSpecial(url.protocol)) { + url.pathname = '/' + url.pathname; + } + + // + // We should not add port numbers if they are already the default port number + // for a given protocol. As the host also contains the port number we're going + // override it with the hostname which contains no port number. + // + if (!required(url.port, url.protocol)) { + url.host = url.hostname; + url.port = ''; + } + + // + // Parse down the `auth` for the username and password. + // + url.username = url.password = ''; + + if (url.auth) { + index = url.auth.indexOf(':'); + + if (~index) { + url.username = url.auth.slice(0, index); + url.username = encodeURIComponent(decodeURIComponent(url.username)); + + url.password = url.auth.slice(index + 1); + url.password = encodeURIComponent(decodeURIComponent(url.password)) + } else { + url.username = encodeURIComponent(decodeURIComponent(url.auth)); + } + + url.auth = url.password ? url.username +':'+ url.password : url.username; + } + + url.origin = url.protocol !== 'file:' && isSpecial(url.protocol) && url.host + ? url.protocol +'//'+ url.host + : 'null'; + + // + // The href is just the compiled result. + // + url.href = url.toString(); +} + +/** + * This is convenience method for changing properties in the URL instance to + * insure that they all propagate correctly. + * + * @param {String} part Property we need to adjust. + * @param {Mixed} value The newly assigned value. + * @param {Boolean|Function} fn When setting the query, it will be the function + * used to parse the query. + * When setting the protocol, double slash will be + * removed from the final url if it is true. + * @returns {URL} URL instance for chaining. + * @public + */ +function set(part, value, fn) { + var url = this; + + switch (part) { + case 'query': + if ('string' === typeof value && value.length) { + value = (fn || qs.parse)(value); + } + + url[part] = value; + break; + + case 'port': + url[part] = value; + + if (!required(value, url.protocol)) { + url.host = url.hostname; + url[part] = ''; + } else if (value) { + url.host = url.hostname +':'+ value; + } + + break; + + case 'hostname': + url[part] = value; + + if (url.port) value += ':'+ url.port; + url.host = value; + break; + + case 'host': + url[part] = value; + + if (port.test(value)) { + value = value.split(':'); + url.port = value.pop(); + url.hostname = value.join(':'); + } else { + url.hostname = value; + url.port = ''; + } + + break; + + case 'protocol': + url.protocol = value.toLowerCase(); + url.slashes = !fn; + break; + + case 'pathname': + case 'hash': + if (value) { + var char = part === 'pathname' ? '/' : '#'; + url[part] = value.charAt(0) !== char ? char + value : value; + } else { + url[part] = value; + } + break; + + case 'username': + case 'password': + url[part] = encodeURIComponent(value); + break; + + case 'auth': + var index = value.indexOf(':'); + + if (~index) { + url.username = value.slice(0, index); + url.username = encodeURIComponent(decodeURIComponent(url.username)); + + url.password = value.slice(index + 1); + url.password = encodeURIComponent(decodeURIComponent(url.password)); + } else { + url.username = encodeURIComponent(decodeURIComponent(value)); + } + } + + for (var i = 0; i < rules.length; i++) { + var ins = rules[i]; + + if (ins[4]) url[ins[1]] = url[ins[1]].toLowerCase(); + } + + url.auth = url.password ? url.username +':'+ url.password : url.username; + + url.origin = url.protocol !== 'file:' && isSpecial(url.protocol) && url.host + ? url.protocol +'//'+ url.host + : 'null'; + + url.href = url.toString(); + + return url; +} + +/** + * Transform the properties back in to a valid and full URL string. + * + * @param {Function} stringify Optional query stringify function. + * @returns {String} Compiled version of the URL. + * @public + */ +function toString(stringify) { + if (!stringify || 'function' !== typeof stringify) stringify = qs.stringify; + + var query + , url = this + , host = url.host + , protocol = url.protocol; + + if (protocol && protocol.charAt(protocol.length - 1) !== ':') protocol += ':'; + + var result = + protocol + + ((url.protocol && url.slashes) || isSpecial(url.protocol) ? '//' : ''); + + if (url.username) { + result += url.username; + if (url.password) result += ':'+ url.password; + result += '@'; + } else if (url.password) { + result += ':'+ url.password; + result += '@'; + } else if ( + url.protocol !== 'file:' && + isSpecial(url.protocol) && + !host && + url.pathname !== '/' + ) { + // + // Add back the empty userinfo, otherwise the original invalid URL + // might be transformed into a valid one with `url.pathname` as host. + // + result += '@'; + } + + // + // Trailing colon is removed from `url.host` when it is parsed. If it still + // ends with a colon, then add back the trailing colon that was removed. This + // prevents an invalid URL from being transformed into a valid one. + // + if (host[host.length - 1] === ':' || (port.test(url.hostname) && !url.port)) { + host += ':'; + } + + result += host + url.pathname; + + query = 'object' === typeof url.query ? stringify(url.query) : url.query; + if (query) result += '?' !== query.charAt(0) ? '?'+ query : query; + + if (url.hash) result += url.hash; + + return result; +} + +Url.prototype = { set: set, toString: toString }; + +// +// Expose the URL parser and some additional properties that might be useful for +// others or testing. +// +Url.extractProtocol = extractProtocol; +Url.location = lolcation; +Url.trimLeft = trimLeft; +Url.qs = qs; + +module.exports = Url; + +}).call(this)}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) +},{"querystringify":2,"requires-port":3}],2:[function(require,module,exports){ +'use strict'; + +var has = Object.prototype.hasOwnProperty + , undef; + +/** + * Decode a URI encoded string. + * + * @param {String} input The URI encoded string. + * @returns {String|Null} The decoded string. + * @api private + */ +function decode(input) { + try { + return decodeURIComponent(input.replace(/\+/g, ' ')); + } catch (e) { + return null; + } +} + +/** + * Attempts to encode a given input. + * + * @param {String} input The string that needs to be encoded. + * @returns {String|Null} The encoded string. + * @api private + */ +function encode(input) { + try { + return encodeURIComponent(input); + } catch (e) { + return null; + } +} + +/** + * Simple query string parser. + * + * @param {String} query The query string that needs to be parsed. + * @returns {Object} + * @api public + */ +function querystring(query) { + var parser = /([^=?#&]+)=?([^&]*)/g + , result = {} + , part; + + while (part = parser.exec(query)) { + var key = decode(part[1]) + , value = decode(part[2]); + + // + // Prevent overriding of existing properties. This ensures that build-in + // methods like `toString` or __proto__ are not overriden by malicious + // querystrings. + // + // In the case if failed decoding, we want to omit the key/value pairs + // from the result. + // + if (key === null || value === null || key in result) continue; + result[key] = value; + } + + return result; +} + +/** + * Transform a query string to an object. + * + * @param {Object} obj Object that should be transformed. + * @param {String} prefix Optional prefix. + * @returns {String} + * @api public + */ +function querystringify(obj, prefix) { + prefix = prefix || ''; + + var pairs = [] + , value + , key; + + // + // Optionally prefix with a '?' if needed + // + if ('string' !== typeof prefix) prefix = '?'; + + for (key in obj) { + if (has.call(obj, key)) { + value = obj[key]; + + // + // Edge cases where we actually want to encode the value to an empty + // string instead of the stringified value. + // + if (!value && (value === null || value === undef || isNaN(value))) { + value = ''; + } + + key = encode(key); + value = encode(value); + + // + // If we failed to encode the strings, we should bail out as we don't + // want to add invalid strings to the query. + // + if (key === null || value === null) continue; + pairs.push(key +'='+ value); + } + } + + return pairs.length ? prefix + pairs.join('&') : ''; +} + +// +// Expose the module. +// +exports.stringify = querystringify; +exports.parse = querystring; + +},{}],3:[function(require,module,exports){ +'use strict'; + +/** + * Check if we're required to add a port number. + * + * @see https://url.spec.whatwg.org/#default-port + * @param {Number|String} port Port number we need to check + * @param {String} protocol Protocol we need to check against. + * @returns {Boolean} Is it a default port for the given protocol + * @api private + */ +module.exports = function required(port, protocol) { + protocol = protocol.split(':')[0]; + port = +port; + + if (!port) return false; + + switch (protocol) { + case 'http': + case 'ws': + return port !== 80; + + case 'https': + case 'wss': + return port !== 443; + + case 'ftp': + return port !== 21; + + case 'gopher': + return port !== 70; + + case 'file': + return false; + } + + return port !== 0; +}; + +},{}]},{},[1])(1) +}); diff --git a/node_modules/url-parse/dist/url-parse.min.js b/node_modules/url-parse/dist/url-parse.min.js new file mode 100644 index 00000000..f0b3b4c0 --- /dev/null +++ b/node_modules/url-parse/dist/url-parse.min.js @@ -0,0 +1 @@ +!function(e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):("undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this).URLParse=e()}(function(){return function n(r,s,a){function i(o,e){if(!s[o]){if(!r[o]){var t="function"==typeof require&&require;if(!e&&t)return t(o,!0);if(p)return p(o,!0);throw(e=new Error("Cannot find module '"+o+"'")).code="MODULE_NOT_FOUND",e}t=s[o]={exports:{}},r[o][0].call(t.exports,function(e){return i(r[o][1][e]||e)},t,t.exports,n,r,s,a)}return s[o].exports}for(var p="function"==typeof require&&require,e=0;e= 2) { + rest = rest.slice(2); + } + } else if (isSpecial(protocol)) { + rest = match[4]; + } else if (protocol) { + if (forwardSlashes) { + rest = rest.slice(2); + } + } else if (slashesCount >= 2 && isSpecial(location.protocol)) { + rest = match[4]; + } + + return { + protocol: protocol, + slashes: forwardSlashes || isSpecial(protocol), + slashesCount: slashesCount, + rest: rest + }; +} + +/** + * Resolve a relative URL pathname against a base URL pathname. + * + * @param {String} relative Pathname of the relative URL. + * @param {String} base Pathname of the base URL. + * @return {String} Resolved pathname. + * @private + */ +function resolve(relative, base) { + if (relative === '') return base; + + var path = (base || '/').split('/').slice(0, -1).concat(relative.split('/')) + , i = path.length + , last = path[i - 1] + , unshift = false + , up = 0; + + while (i--) { + if (path[i] === '.') { + path.splice(i, 1); + } else if (path[i] === '..') { + path.splice(i, 1); + up++; + } else if (up) { + if (i === 0) unshift = true; + path.splice(i, 1); + up--; + } + } + + if (unshift) path.unshift(''); + if (last === '.' || last === '..') path.push(''); + + return path.join('/'); +} + +/** + * The actual URL instance. Instead of returning an object we've opted-in to + * create an actual constructor as it's much more memory efficient and + * faster and it pleases my OCD. + * + * It is worth noting that we should not use `URL` as class name to prevent + * clashes with the global URL instance that got introduced in browsers. + * + * @constructor + * @param {String} address URL we want to parse. + * @param {Object|String} [location] Location defaults for relative paths. + * @param {Boolean|Function} [parser] Parser for the query string. + * @private + */ +function Url(address, location, parser) { + address = trimLeft(address); + address = address.replace(CRHTLF, ''); + + if (!(this instanceof Url)) { + return new Url(address, location, parser); + } + + var relative, extracted, parse, instruction, index, key + , instructions = rules.slice() + , type = typeof location + , url = this + , i = 0; + + // + // The following if statements allows this module two have compatibility with + // 2 different API: + // + // 1. Node.js's `url.parse` api which accepts a URL, boolean as arguments + // where the boolean indicates that the query string should also be parsed. + // + // 2. The `URL` interface of the browser which accepts a URL, object as + // arguments. The supplied object will be used as default values / fall-back + // for relative paths. + // + if ('object' !== type && 'string' !== type) { + parser = location; + location = null; + } + + if (parser && 'function' !== typeof parser) parser = qs.parse; + + location = lolcation(location); + + // + // Extract protocol information before running the instructions. + // + extracted = extractProtocol(address || '', location); + relative = !extracted.protocol && !extracted.slashes; + url.slashes = extracted.slashes || relative && location.slashes; + url.protocol = extracted.protocol || location.protocol || ''; + address = extracted.rest; + + // + // When the authority component is absent the URL starts with a path + // component. + // + if ( + extracted.protocol === 'file:' && ( + extracted.slashesCount !== 2 || windowsDriveLetter.test(address)) || + (!extracted.slashes && + (extracted.protocol || + extracted.slashesCount < 2 || + !isSpecial(url.protocol))) + ) { + instructions[3] = [/(.*)/, 'pathname']; + } + + for (; i < instructions.length; i++) { + instruction = instructions[i]; + + if (typeof instruction === 'function') { + address = instruction(address, url); + continue; + } + + parse = instruction[0]; + key = instruction[1]; + + if (parse !== parse) { + url[key] = address; + } else if ('string' === typeof parse) { + index = parse === '@' + ? address.lastIndexOf(parse) + : address.indexOf(parse); + + if (~index) { + if ('number' === typeof instruction[2]) { + url[key] = address.slice(0, index); + address = address.slice(index + instruction[2]); + } else { + url[key] = address.slice(index); + address = address.slice(0, index); + } + } + } else if ((index = parse.exec(address))) { + url[key] = index[1]; + address = address.slice(0, index.index); + } + + url[key] = url[key] || ( + relative && instruction[3] ? location[key] || '' : '' + ); + + // + // Hostname, host and protocol should be lowercased so they can be used to + // create a proper `origin`. + // + if (instruction[4]) url[key] = url[key].toLowerCase(); + } + + // + // Also parse the supplied query string in to an object. If we're supplied + // with a custom parser as function use that instead of the default build-in + // parser. + // + if (parser) url.query = parser(url.query); + + // + // If the URL is relative, resolve the pathname against the base URL. + // + if ( + relative + && location.slashes + && url.pathname.charAt(0) !== '/' + && (url.pathname !== '' || location.pathname !== '') + ) { + url.pathname = resolve(url.pathname, location.pathname); + } + + // + // Default to a / for pathname if none exists. This normalizes the URL + // to always have a / + // + if (url.pathname.charAt(0) !== '/' && isSpecial(url.protocol)) { + url.pathname = '/' + url.pathname; + } + + // + // We should not add port numbers if they are already the default port number + // for a given protocol. As the host also contains the port number we're going + // override it with the hostname which contains no port number. + // + if (!required(url.port, url.protocol)) { + url.host = url.hostname; + url.port = ''; + } + + // + // Parse down the `auth` for the username and password. + // + url.username = url.password = ''; + + if (url.auth) { + index = url.auth.indexOf(':'); + + if (~index) { + url.username = url.auth.slice(0, index); + url.username = encodeURIComponent(decodeURIComponent(url.username)); + + url.password = url.auth.slice(index + 1); + url.password = encodeURIComponent(decodeURIComponent(url.password)) + } else { + url.username = encodeURIComponent(decodeURIComponent(url.auth)); + } + + url.auth = url.password ? url.username +':'+ url.password : url.username; + } + + url.origin = url.protocol !== 'file:' && isSpecial(url.protocol) && url.host + ? url.protocol +'//'+ url.host + : 'null'; + + // + // The href is just the compiled result. + // + url.href = url.toString(); +} + +/** + * This is convenience method for changing properties in the URL instance to + * insure that they all propagate correctly. + * + * @param {String} part Property we need to adjust. + * @param {Mixed} value The newly assigned value. + * @param {Boolean|Function} fn When setting the query, it will be the function + * used to parse the query. + * When setting the protocol, double slash will be + * removed from the final url if it is true. + * @returns {URL} URL instance for chaining. + * @public + */ +function set(part, value, fn) { + var url = this; + + switch (part) { + case 'query': + if ('string' === typeof value && value.length) { + value = (fn || qs.parse)(value); + } + + url[part] = value; + break; + + case 'port': + url[part] = value; + + if (!required(value, url.protocol)) { + url.host = url.hostname; + url[part] = ''; + } else if (value) { + url.host = url.hostname +':'+ value; + } + + break; + + case 'hostname': + url[part] = value; + + if (url.port) value += ':'+ url.port; + url.host = value; + break; + + case 'host': + url[part] = value; + + if (port.test(value)) { + value = value.split(':'); + url.port = value.pop(); + url.hostname = value.join(':'); + } else { + url.hostname = value; + url.port = ''; + } + + break; + + case 'protocol': + url.protocol = value.toLowerCase(); + url.slashes = !fn; + break; + + case 'pathname': + case 'hash': + if (value) { + var char = part === 'pathname' ? '/' : '#'; + url[part] = value.charAt(0) !== char ? char + value : value; + } else { + url[part] = value; + } + break; + + case 'username': + case 'password': + url[part] = encodeURIComponent(value); + break; + + case 'auth': + var index = value.indexOf(':'); + + if (~index) { + url.username = value.slice(0, index); + url.username = encodeURIComponent(decodeURIComponent(url.username)); + + url.password = value.slice(index + 1); + url.password = encodeURIComponent(decodeURIComponent(url.password)); + } else { + url.username = encodeURIComponent(decodeURIComponent(value)); + } + } + + for (var i = 0; i < rules.length; i++) { + var ins = rules[i]; + + if (ins[4]) url[ins[1]] = url[ins[1]].toLowerCase(); + } + + url.auth = url.password ? url.username +':'+ url.password : url.username; + + url.origin = url.protocol !== 'file:' && isSpecial(url.protocol) && url.host + ? url.protocol +'//'+ url.host + : 'null'; + + url.href = url.toString(); + + return url; +} + +/** + * Transform the properties back in to a valid and full URL string. + * + * @param {Function} stringify Optional query stringify function. + * @returns {String} Compiled version of the URL. + * @public + */ +function toString(stringify) { + if (!stringify || 'function' !== typeof stringify) stringify = qs.stringify; + + var query + , url = this + , host = url.host + , protocol = url.protocol; + + if (protocol && protocol.charAt(protocol.length - 1) !== ':') protocol += ':'; + + var result = + protocol + + ((url.protocol && url.slashes) || isSpecial(url.protocol) ? '//' : ''); + + if (url.username) { + result += url.username; + if (url.password) result += ':'+ url.password; + result += '@'; + } else if (url.password) { + result += ':'+ url.password; + result += '@'; + } else if ( + url.protocol !== 'file:' && + isSpecial(url.protocol) && + !host && + url.pathname !== '/' + ) { + // + // Add back the empty userinfo, otherwise the original invalid URL + // might be transformed into a valid one with `url.pathname` as host. + // + result += '@'; + } + + // + // Trailing colon is removed from `url.host` when it is parsed. If it still + // ends with a colon, then add back the trailing colon that was removed. This + // prevents an invalid URL from being transformed into a valid one. + // + if (host[host.length - 1] === ':' || (port.test(url.hostname) && !url.port)) { + host += ':'; + } + + result += host + url.pathname; + + query = 'object' === typeof url.query ? stringify(url.query) : url.query; + if (query) result += '?' !== query.charAt(0) ? '?'+ query : query; + + if (url.hash) result += url.hash; + + return result; +} + +Url.prototype = { set: set, toString: toString }; + +// +// Expose the URL parser and some additional properties that might be useful for +// others or testing. +// +Url.extractProtocol = extractProtocol; +Url.location = lolcation; +Url.trimLeft = trimLeft; +Url.qs = qs; + +module.exports = Url; diff --git a/node_modules/url-parse/package.json b/node_modules/url-parse/package.json new file mode 100644 index 00000000..8d1bbbe2 --- /dev/null +++ b/node_modules/url-parse/package.json @@ -0,0 +1,49 @@ +{ + "name": "url-parse", + "version": "1.5.10", + "description": "Small footprint URL parser that works seamlessly across Node.js and browser environments", + "main": "index.js", + "scripts": { + "browserify": "rm -rf dist && mkdir -p dist && browserify index.js -s URLParse -o dist/url-parse.js", + "minify": "uglifyjs dist/url-parse.js --source-map -cm -o dist/url-parse.min.js", + "test": "c8 --reporter=lcov --reporter=text mocha test/test.js", + "test-browser": "node test/browser.js", + "prepublishOnly": "npm run browserify && npm run minify", + "watch": "mocha --watch test/test.js" + }, + "files": [ + "index.js", + "dist" + ], + "repository": { + "type": "git", + "url": "https://github.com/unshiftio/url-parse.git" + }, + "keywords": [ + "URL", + "parser", + "uri", + "url", + "parse", + "query", + "string", + "querystring", + "stringify" + ], + "author": "Arnout Kazemier", + "license": "MIT", + "dependencies": { + "querystringify": "^2.1.1", + "requires-port": "^1.0.0" + }, + "devDependencies": { + "assume": "^2.2.0", + "browserify": "^17.0.0", + "c8": "^7.3.1", + "mocha": "^9.0.3", + "pre-commit": "^1.2.2", + "sauce-browsers": "^2.0.0", + "sauce-test": "^1.3.3", + "uglify-js": "^3.5.7" + } +} diff --git a/node_modules/web-streams-polyfill/LICENSE b/node_modules/web-streams-polyfill/LICENSE new file mode 100644 index 00000000..9fe85ac0 --- /dev/null +++ b/node_modules/web-streams-polyfill/LICENSE @@ -0,0 +1,22 @@ +The MIT License (MIT) + +Copyright (c) 2024 Mattias Buelens +Copyright (c) 2016 Diwank Singh Tomer + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/node_modules/web-streams-polyfill/README.md b/node_modules/web-streams-polyfill/README.md new file mode 100644 index 00000000..f4023ff0 --- /dev/null +++ b/node_modules/web-streams-polyfill/README.md @@ -0,0 +1,110 @@ +# web-streams-polyfill + +Web Streams, based on the WHATWG spec reference implementation. + +[![build status](https://api.travis-ci.com/MattiasBuelens/web-streams-polyfill.svg?branch=master)](https://travis-ci.com/MattiasBuelens/web-streams-polyfill) +[![npm version](https://img.shields.io/npm/v/web-streams-polyfill.svg)](https://www.npmjs.com/package/web-streams-polyfill) +[![license](https://img.shields.io/npm/l/web-streams-polyfill.svg)](https://github.com/MattiasBuelens/web-streams-polyfill/blob/master/LICENSE) + +## Links + + - [Official spec][spec] + - [Reference implementation][ref-impl] + +## Usage + +This library comes in multiple variants: +* `web-streams-polyfill`: a polyfill that replaces the native stream implementations. + Recommended for use in web apps supporting older browsers through a ` + + + +``` +Usage as a Node module: +```js +var streams = require("web-streams-polyfill/ponyfill"); +var readable = new streams.ReadableStream(); +``` +Usage as a ES2015 module: +```js +import { ReadableStream } from "web-streams-polyfill/ponyfill"; +const readable = new ReadableStream(); +``` + +## Compatibility + +The `polyfill` and `ponyfill` variants work in any ES5-compatible environment that has a global `Promise`. +If you need to support older browsers or Node versions that do not have a native `Promise` implementation +(check the [support table][promise-support]), you must first include a `Promise` polyfill +(e.g. [promise-polyfill][promise-polyfill]). + +The `polyfill/es6` and `ponyfill/es6` variants work in any ES2015-compatible environment. + +The `polyfill/es2018` and `ponyfill/es2018` variants work in any ES2018-compatible environment. + +[Async iterable support for `ReadableStream`][rs-asynciterator] is available in all variants, but requires an ES2018-compatible environment or a polyfill for `Symbol.asyncIterator`. + +[`WritableStreamDefaultController.signal`][ws-controller-signal] is available in all variants, but requires a global `AbortController` constructor. If necessary, consider using a polyfill such as [abortcontroller-polyfill]. + +[Reading with a BYOB reader][mdn-byob-read] is available in all variants, but requires `ArrayBuffer.prototype.transfer()` or `structuredClone()` to exist in order to correctly transfer the given view's buffer. If not available, then the buffer won't be transferred during the read. + +## Compliance + +The polyfill implements [version `4dc123a` (13 Nov 2023)][spec-snapshot] of the streams specification. + +The polyfill is tested against the same [web platform tests][wpt] that are used by browsers to test their native implementations. +The polyfill aims to pass all tests, although it allows some exceptions for practical reasons: +* The `es2018` variant passes all of the tests. +* The `es6` variant passes the same tests as the `es2018` variant, except for the [test for the prototype of `ReadableStream`'s async iterator][wpt-async-iterator-prototype]. + Retrieving the correct `%AsyncIteratorPrototype%` requires using an async generator (`async function* () {}`), which is invalid syntax before ES2018. + Instead, the polyfill [creates its own version][stub-async-iterator-prototype] which is functionally equivalent to the real prototype. +* The `es5` variant passes the same tests as the `es6` variant, except for various tests about specific characteristics of the constructors, properties and methods. + These test failures do not affect the run-time behavior of the polyfill. + For example: + * The `name` property of down-leveled constructors is incorrect. + * The `length` property of down-leveled constructors and methods with optional arguments is incorrect. + * Not all properties and methods are correctly marked as non-enumerable. + * Down-leveled class methods are not correctly marked as non-constructable. + +The type definitions are compatible with the built-in stream types of TypeScript 3.3. + +## Contributors + +Thanks to these people for their work on [the original polyfill][creatorrr-polyfill]: + + - Diwank Singh Tomer ([creatorrr](https://github.com/creatorrr)) + - Anders Riutta ([ariutta](https://github.com/ariutta)) + +[spec]: https://streams.spec.whatwg.org +[ref-impl]: https://github.com/whatwg/streams +[ponyfill]: https://github.com/sindresorhus/ponyfill +[promise-support]: https://kangax.github.io/compat-table/es6/#test-Promise +[promise-polyfill]: https://www.npmjs.com/package/promise-polyfill +[rs-asynciterator]: https://streams.spec.whatwg.org/#rs-asynciterator +[ws-controller-signal]: https://streams.spec.whatwg.org/#ws-default-controller-signal +[abortcontroller-polyfill]: https://www.npmjs.com/package/abortcontroller-polyfill +[mdn-byob-read]: https://developer.mozilla.org/en-US/docs/Web/API/ReadableStreamBYOBReader/read +[spec-snapshot]: https://streams.spec.whatwg.org/commit-snapshots/4dc123a6e7f7ba89a8c6a7975b021156f39cab52/ +[wpt]: https://github.com/web-platform-tests/wpt/tree/2a298b616b7c865917d7198a287310881cbfdd8d/streams +[wpt-async-iterator-prototype]: https://github.com/web-platform-tests/wpt/blob/2a298b616b7c865917d7198a287310881cbfdd8d/streams/readable-streams/async-iterator.any.js#L24 +[stub-async-iterator-prototype]: https://github.com/MattiasBuelens/web-streams-polyfill/blob/v2.0.0/src/target/es5/stub/async-iterator-prototype.ts +[creatorrr-polyfill]: https://github.com/creatorrr/web-streams-polyfill diff --git a/node_modules/web-streams-polyfill/dist/polyfill.es2018.js b/node_modules/web-streams-polyfill/dist/polyfill.es2018.js new file mode 100644 index 00000000..20a929a8 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/polyfill.es2018.js @@ -0,0 +1,4765 @@ +/** + * @license + * web-streams-polyfill v3.3.3 + * Copyright 2024 Mattias Buelens, Diwank Singh Tomer and other contributors. + * This code is released under the MIT license. + * SPDX-License-Identifier: MIT + */ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : + typeof define === 'function' && define.amd ? define(['exports'], factory) : + (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.WebStreamsPolyfill = {})); +})(this, (function (exports) { 'use strict'; + + function noop() { + return undefined; + } + + function typeIsObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; + } + const rethrowAssertionErrorRejection = noop; + function setFunctionName(fn, name) { + try { + Object.defineProperty(fn, 'name', { + value: name, + configurable: true + }); + } + catch (_a) { + // This property is non-configurable in older browsers, so ignore if this throws. + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility + } + } + + const originalPromise = Promise; + const originalPromiseThen = Promise.prototype.then; + const originalPromiseReject = Promise.reject.bind(originalPromise); + // https://webidl.spec.whatwg.org/#a-new-promise + function newPromise(executor) { + return new originalPromise(executor); + } + // https://webidl.spec.whatwg.org/#a-promise-resolved-with + function promiseResolvedWith(value) { + return newPromise(resolve => resolve(value)); + } + // https://webidl.spec.whatwg.org/#a-promise-rejected-with + function promiseRejectedWith(reason) { + return originalPromiseReject(reason); + } + function PerformPromiseThen(promise, onFulfilled, onRejected) { + // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an + // approximation. + return originalPromiseThen.call(promise, onFulfilled, onRejected); + } + // Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned + // from that handler. To prevent this, return null instead of void from all handlers. + // http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it + function uponPromise(promise, onFulfilled, onRejected) { + PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection); + } + function uponFulfillment(promise, onFulfilled) { + uponPromise(promise, onFulfilled); + } + function uponRejection(promise, onRejected) { + uponPromise(promise, undefined, onRejected); + } + function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) { + return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler); + } + function setPromiseIsHandledToTrue(promise) { + PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection); + } + let _queueMicrotask = callback => { + if (typeof queueMicrotask === 'function') { + _queueMicrotask = queueMicrotask; + } + else { + const resolvedPromise = promiseResolvedWith(undefined); + _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb); + } + return _queueMicrotask(callback); + }; + function reflectCall(F, V, args) { + if (typeof F !== 'function') { + throw new TypeError('Argument is not a function'); + } + return Function.prototype.apply.call(F, V, args); + } + function promiseCall(F, V, args) { + try { + return promiseResolvedWith(reflectCall(F, V, args)); + } + catch (value) { + return promiseRejectedWith(value); + } + } + + // Original from Chromium + // https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js + const QUEUE_MAX_ARRAY_SIZE = 16384; + /** + * Simple queue structure. + * + * Avoids scalability issues with using a packed array directly by using + * multiple arrays in a linked list and keeping the array size bounded. + */ + class SimpleQueue { + constructor() { + this._cursor = 0; + this._size = 0; + // _front and _back are always defined. + this._front = { + _elements: [], + _next: undefined + }; + this._back = this._front; + // The cursor is used to avoid calling Array.shift(). + // It contains the index of the front element of the array inside the + // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE). + this._cursor = 0; + // When there is only one node, size === elements.length - cursor. + this._size = 0; + } + get length() { + return this._size; + } + // For exception safety, this method is structured in order: + // 1. Read state + // 2. Calculate required state mutations + // 3. Perform state mutations + push(element) { + const oldBack = this._back; + let newBack = oldBack; + if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) { + newBack = { + _elements: [], + _next: undefined + }; + } + // push() is the mutation most likely to throw an exception, so it + // goes first. + oldBack._elements.push(element); + if (newBack !== oldBack) { + this._back = newBack; + oldBack._next = newBack; + } + ++this._size; + } + // Like push(), shift() follows the read -> calculate -> mutate pattern for + // exception safety. + shift() { // must not be called on an empty queue + const oldFront = this._front; + let newFront = oldFront; + const oldCursor = this._cursor; + let newCursor = oldCursor + 1; + const elements = oldFront._elements; + const element = elements[oldCursor]; + if (newCursor === QUEUE_MAX_ARRAY_SIZE) { + newFront = oldFront._next; + newCursor = 0; + } + // No mutations before this point. + --this._size; + this._cursor = newCursor; + if (oldFront !== newFront) { + this._front = newFront; + } + // Permit shifted element to be garbage collected. + elements[oldCursor] = undefined; + return element; + } + // The tricky thing about forEach() is that it can be called + // re-entrantly. The queue may be mutated inside the callback. It is easy to + // see that push() within the callback has no negative effects since the end + // of the queue is checked for on every iteration. If shift() is called + // repeatedly within the callback then the next iteration may return an + // element that has been removed. In this case the callback will be called + // with undefined values until we either "catch up" with elements that still + // exist or reach the back of the queue. + forEach(callback) { + let i = this._cursor; + let node = this._front; + let elements = node._elements; + while (i !== elements.length || node._next !== undefined) { + if (i === elements.length) { + node = node._next; + elements = node._elements; + i = 0; + if (elements.length === 0) { + break; + } + } + callback(elements[i]); + ++i; + } + } + // Return the element that would be returned if shift() was called now, + // without modifying the queue. + peek() { // must not be called on an empty queue + const front = this._front; + const cursor = this._cursor; + return front._elements[cursor]; + } + } + + const AbortSteps = Symbol('[[AbortSteps]]'); + const ErrorSteps = Symbol('[[ErrorSteps]]'); + const CancelSteps = Symbol('[[CancelSteps]]'); + const PullSteps = Symbol('[[PullSteps]]'); + const ReleaseSteps = Symbol('[[ReleaseSteps]]'); + + function ReadableStreamReaderGenericInitialize(reader, stream) { + reader._ownerReadableStream = stream; + stream._reader = reader; + if (stream._state === 'readable') { + defaultReaderClosedPromiseInitialize(reader); + } + else if (stream._state === 'closed') { + defaultReaderClosedPromiseInitializeAsResolved(reader); + } + else { + defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError); + } + } + // A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state + // check. + function ReadableStreamReaderGenericCancel(reader, reason) { + const stream = reader._ownerReadableStream; + return ReadableStreamCancel(stream, reason); + } + function ReadableStreamReaderGenericRelease(reader) { + const stream = reader._ownerReadableStream; + if (stream._state === 'readable') { + defaultReaderClosedPromiseReject(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + else { + defaultReaderClosedPromiseResetToRejected(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + stream._readableStreamController[ReleaseSteps](); + stream._reader = undefined; + reader._ownerReadableStream = undefined; + } + // Helper functions for the readers. + function readerLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released reader'); + } + // Helper functions for the ReadableStreamDefaultReader. + function defaultReaderClosedPromiseInitialize(reader) { + reader._closedPromise = newPromise((resolve, reject) => { + reader._closedPromise_resolve = resolve; + reader._closedPromise_reject = reject; + }); + } + function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseReject(reader, reason); + } + function defaultReaderClosedPromiseInitializeAsResolved(reader) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseResolve(reader); + } + function defaultReaderClosedPromiseReject(reader, reason) { + if (reader._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(reader._closedPromise); + reader._closedPromise_reject(reason); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; + } + function defaultReaderClosedPromiseResetToRejected(reader, reason) { + defaultReaderClosedPromiseInitializeAsRejected(reader, reason); + } + function defaultReaderClosedPromiseResolve(reader) { + if (reader._closedPromise_resolve === undefined) { + return; + } + reader._closedPromise_resolve(undefined); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; + } + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill + const NumberIsFinite = Number.isFinite || function (x) { + return typeof x === 'number' && isFinite(x); + }; + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill + const MathTrunc = Math.trunc || function (v) { + return v < 0 ? Math.ceil(v) : Math.floor(v); + }; + + // https://heycam.github.io/webidl/#idl-dictionaries + function isDictionary(x) { + return typeof x === 'object' || typeof x === 'function'; + } + function assertDictionary(obj, context) { + if (obj !== undefined && !isDictionary(obj)) { + throw new TypeError(`${context} is not an object.`); + } + } + // https://heycam.github.io/webidl/#idl-callback-functions + function assertFunction(x, context) { + if (typeof x !== 'function') { + throw new TypeError(`${context} is not a function.`); + } + } + // https://heycam.github.io/webidl/#idl-object + function isObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; + } + function assertObject(x, context) { + if (!isObject(x)) { + throw new TypeError(`${context} is not an object.`); + } + } + function assertRequiredArgument(x, position, context) { + if (x === undefined) { + throw new TypeError(`Parameter ${position} is required in '${context}'.`); + } + } + function assertRequiredField(x, field, context) { + if (x === undefined) { + throw new TypeError(`${field} is required in '${context}'.`); + } + } + // https://heycam.github.io/webidl/#idl-unrestricted-double + function convertUnrestrictedDouble(value) { + return Number(value); + } + function censorNegativeZero(x) { + return x === 0 ? 0 : x; + } + function integerPart(x) { + return censorNegativeZero(MathTrunc(x)); + } + // https://heycam.github.io/webidl/#idl-unsigned-long-long + function convertUnsignedLongLongWithEnforceRange(value, context) { + const lowerBound = 0; + const upperBound = Number.MAX_SAFE_INTEGER; + let x = Number(value); + x = censorNegativeZero(x); + if (!NumberIsFinite(x)) { + throw new TypeError(`${context} is not a finite number`); + } + x = integerPart(x); + if (x < lowerBound || x > upperBound) { + throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`); + } + if (!NumberIsFinite(x) || x === 0) { + return 0; + } + // TODO Use BigInt if supported? + // let xBigInt = BigInt(integerPart(x)); + // xBigInt = BigInt.asUintN(64, xBigInt); + // return Number(xBigInt); + return x; + } + + function assertReadableStream(x, context) { + if (!IsReadableStream(x)) { + throw new TypeError(`${context} is not a ReadableStream.`); + } + } + + // Abstract operations for the ReadableStream. + function AcquireReadableStreamDefaultReader(stream) { + return new ReadableStreamDefaultReader(stream); + } + // ReadableStream API exposed for controllers. + function ReadableStreamAddReadRequest(stream, readRequest) { + stream._reader._readRequests.push(readRequest); + } + function ReadableStreamFulfillReadRequest(stream, chunk, done) { + const reader = stream._reader; + const readRequest = reader._readRequests.shift(); + if (done) { + readRequest._closeSteps(); + } + else { + readRequest._chunkSteps(chunk); + } + } + function ReadableStreamGetNumReadRequests(stream) { + return stream._reader._readRequests.length; + } + function ReadableStreamHasDefaultReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamDefaultReader(reader)) { + return false; + } + return true; + } + /** + * A default reader vended by a {@link ReadableStream}. + * + * @public + */ + class ReadableStreamDefaultReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, + * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + /** + * Returns a promise that allows access to the next chunk from the stream's internal queue, if available. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + read() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('read')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: () => resolvePromise({ value: undefined, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamDefaultReaderRead(this, readRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamDefaultReader(this)) { + throw defaultReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamDefaultReaderRelease(this); + } + } + Object.defineProperties(ReadableStreamDefaultReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } + }); + setFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel'); + setFunctionName(ReadableStreamDefaultReader.prototype.read, 'read'); + setFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultReader', + configurable: true + }); + } + // Abstract operations for the readers. + function IsReadableStreamDefaultReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) { + return false; + } + return x instanceof ReadableStreamDefaultReader; + } + function ReadableStreamDefaultReaderRead(reader, readRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'closed') { + readRequest._closeSteps(); + } + else if (stream._state === 'errored') { + readRequest._errorSteps(stream._storedError); + } + else { + stream._readableStreamController[PullSteps](readRequest); + } + } + function ReadableStreamDefaultReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + function ReadableStreamDefaultReaderErrorReadRequests(reader, e) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._errorSteps(e); + }); + } + // Helper functions for the ReadableStreamDefaultReader. + function defaultReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`); + } + + /// + /* eslint-disable @typescript-eslint/no-empty-function */ + const AsyncIteratorPrototype = Object.getPrototypeOf(Object.getPrototypeOf(async function* () { }).prototype); + + /// + class ReadableStreamAsyncIteratorImpl { + constructor(reader, preventCancel) { + this._ongoingPromise = undefined; + this._isFinished = false; + this._reader = reader; + this._preventCancel = preventCancel; + } + next() { + const nextSteps = () => this._nextSteps(); + this._ongoingPromise = this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) : + nextSteps(); + return this._ongoingPromise; + } + return(value) { + const returnSteps = () => this._returnSteps(value); + return this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) : + returnSteps(); + } + _nextSteps() { + if (this._isFinished) { + return Promise.resolve({ value: undefined, done: true }); + } + const reader = this._reader; + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => { + this._ongoingPromise = undefined; + // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test. + // FIXME Is this a bug in the specification, or in the test? + _queueMicrotask(() => resolvePromise({ value: chunk, done: false })); + }, + _closeSteps: () => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + resolvePromise({ value: undefined, done: true }); + }, + _errorSteps: reason => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + rejectPromise(reason); + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promise; + } + _returnSteps(value) { + if (this._isFinished) { + return Promise.resolve({ value, done: true }); + } + this._isFinished = true; + const reader = this._reader; + if (!this._preventCancel) { + const result = ReadableStreamReaderGenericCancel(reader, value); + ReadableStreamReaderGenericRelease(reader); + return transformPromiseWith(result, () => ({ value, done: true })); + } + ReadableStreamReaderGenericRelease(reader); + return promiseResolvedWith({ value, done: true }); + } + } + const ReadableStreamAsyncIteratorPrototype = { + next() { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next')); + } + return this._asyncIteratorImpl.next(); + }, + return(value) { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return')); + } + return this._asyncIteratorImpl.return(value); + } + }; + Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype); + // Abstract operations for the ReadableStream. + function AcquireReadableStreamAsyncIterator(stream, preventCancel) { + const reader = AcquireReadableStreamDefaultReader(stream); + const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel); + const iterator = Object.create(ReadableStreamAsyncIteratorPrototype); + iterator._asyncIteratorImpl = impl; + return iterator; + } + function IsReadableStreamAsyncIterator(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) { + return false; + } + try { + // noinspection SuspiciousTypeOfGuard + return x._asyncIteratorImpl instanceof + ReadableStreamAsyncIteratorImpl; + } + catch (_a) { + return false; + } + } + // Helper functions for the ReadableStream. + function streamAsyncIteratorBrandCheckException(name) { + return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`); + } + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill + const NumberIsNaN = Number.isNaN || function (x) { + // eslint-disable-next-line no-self-compare + return x !== x; + }; + + var _a, _b, _c; + function CreateArrayFromList(elements) { + // We use arrays to represent lists, so this is basically a no-op. + // Do a slice though just in case we happen to depend on the unique-ness. + return elements.slice(); + } + function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) { + new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset); + } + let TransferArrayBuffer = (O) => { + if (typeof O.transfer === 'function') { + TransferArrayBuffer = buffer => buffer.transfer(); + } + else if (typeof structuredClone === 'function') { + TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] }); + } + else { + // Not implemented correctly + TransferArrayBuffer = buffer => buffer; + } + return TransferArrayBuffer(O); + }; + let IsDetachedBuffer = (O) => { + if (typeof O.detached === 'boolean') { + IsDetachedBuffer = buffer => buffer.detached; + } + else { + // Not implemented correctly + IsDetachedBuffer = buffer => buffer.byteLength === 0; + } + return IsDetachedBuffer(O); + }; + function ArrayBufferSlice(buffer, begin, end) { + // ArrayBuffer.prototype.slice is not available on IE10 + // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice + if (buffer.slice) { + return buffer.slice(begin, end); + } + const length = end - begin; + const slice = new ArrayBuffer(length); + CopyDataBlockBytes(slice, 0, buffer, begin, length); + return slice; + } + function GetMethod(receiver, prop) { + const func = receiver[prop]; + if (func === undefined || func === null) { + return undefined; + } + if (typeof func !== 'function') { + throw new TypeError(`${String(prop)} is not a function`); + } + return func; + } + function CreateAsyncFromSyncIterator(syncIteratorRecord) { + // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%, + // we use yield* inside an async generator function to achieve the same result. + // Wrap the sync iterator inside a sync iterable, so we can use it with yield*. + const syncIterable = { + [Symbol.iterator]: () => syncIteratorRecord.iterator + }; + // Create an async generator function and immediately invoke it. + const asyncIterator = (async function* () { + return yield* syncIterable; + }()); + // Return as an async iterator record. + const nextMethod = asyncIterator.next; + return { iterator: asyncIterator, nextMethod, done: false }; + } + // Aligns with core-js/modules/es.symbol.async-iterator.js + const SymbolAsyncIterator = (_c = (_a = Symbol.asyncIterator) !== null && _a !== void 0 ? _a : (_b = Symbol.for) === null || _b === void 0 ? void 0 : _b.call(Symbol, 'Symbol.asyncIterator')) !== null && _c !== void 0 ? _c : '@@asyncIterator'; + function GetIterator(obj, hint = 'sync', method) { + if (method === undefined) { + if (hint === 'async') { + method = GetMethod(obj, SymbolAsyncIterator); + if (method === undefined) { + const syncMethod = GetMethod(obj, Symbol.iterator); + const syncIteratorRecord = GetIterator(obj, 'sync', syncMethod); + return CreateAsyncFromSyncIterator(syncIteratorRecord); + } + } + else { + method = GetMethod(obj, Symbol.iterator); + } + } + if (method === undefined) { + throw new TypeError('The object is not iterable'); + } + const iterator = reflectCall(method, obj, []); + if (!typeIsObject(iterator)) { + throw new TypeError('The iterator method must return an object'); + } + const nextMethod = iterator.next; + return { iterator, nextMethod, done: false }; + } + function IteratorNext(iteratorRecord) { + const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []); + if (!typeIsObject(result)) { + throw new TypeError('The iterator.next() method must return an object'); + } + return result; + } + function IteratorComplete(iterResult) { + return Boolean(iterResult.done); + } + function IteratorValue(iterResult) { + return iterResult.value; + } + + function IsNonNegativeNumber(v) { + if (typeof v !== 'number') { + return false; + } + if (NumberIsNaN(v)) { + return false; + } + if (v < 0) { + return false; + } + return true; + } + function CloneAsUint8Array(O) { + const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength); + return new Uint8Array(buffer); + } + + function DequeueValue(container) { + const pair = container._queue.shift(); + container._queueTotalSize -= pair.size; + if (container._queueTotalSize < 0) { + container._queueTotalSize = 0; + } + return pair.value; + } + function EnqueueValueWithSize(container, value, size) { + if (!IsNonNegativeNumber(size) || size === Infinity) { + throw new RangeError('Size must be a finite, non-NaN, non-negative number.'); + } + container._queue.push({ value, size }); + container._queueTotalSize += size; + } + function PeekQueueValue(container) { + const pair = container._queue.peek(); + return pair.value; + } + function ResetQueue(container) { + container._queue = new SimpleQueue(); + container._queueTotalSize = 0; + } + + function isDataViewConstructor(ctor) { + return ctor === DataView; + } + function isDataView(view) { + return isDataViewConstructor(view.constructor); + } + function arrayBufferViewElementSize(ctor) { + if (isDataViewConstructor(ctor)) { + return 1; + } + return ctor.BYTES_PER_ELEMENT; + } + + /** + * A pull-into request in a {@link ReadableByteStreamController}. + * + * @public + */ + class ReadableStreamBYOBRequest { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the view for writing in to, or `null` if the BYOB request has already been responded to. + */ + get view() { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('view'); + } + return this._view; + } + respond(bytesWritten) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respond'); + } + assertRequiredArgument(bytesWritten, 1, 'respond'); + bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter'); + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(this._view.buffer)) { + throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`); + } + ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten); + } + respondWithNewView(view) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respondWithNewView'); + } + assertRequiredArgument(view, 1, 'respondWithNewView'); + if (!ArrayBuffer.isView(view)) { + throw new TypeError('You can only respond with array buffer views'); + } + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(view.buffer)) { + throw new TypeError('The given view\'s buffer has been detached and so cannot be used as a response'); + } + ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view); + } + } + Object.defineProperties(ReadableStreamBYOBRequest.prototype, { + respond: { enumerable: true }, + respondWithNewView: { enumerable: true }, + view: { enumerable: true } + }); + setFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond'); + setFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBRequest', + configurable: true + }); + } + /** + * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue. + * + * @public + */ + class ReadableByteStreamController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the current BYOB pull request, or `null` if there isn't one. + */ + get byobRequest() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('byobRequest'); + } + return ReadableByteStreamControllerGetBYOBRequest(this); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('desiredSize'); + } + return ReadableByteStreamControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('close'); + } + if (this._closeRequested) { + throw new TypeError('The stream has already been closed; do not close it again!'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`); + } + ReadableByteStreamControllerClose(this); + } + enqueue(chunk) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('enqueue'); + } + assertRequiredArgument(chunk, 1, 'enqueue'); + if (!ArrayBuffer.isView(chunk)) { + throw new TypeError('chunk must be an array buffer view'); + } + if (chunk.byteLength === 0) { + throw new TypeError('chunk must have non-zero byteLength'); + } + if (chunk.buffer.byteLength === 0) { + throw new TypeError(`chunk's buffer must have non-zero byteLength`); + } + if (this._closeRequested) { + throw new TypeError('stream is closed or draining'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`); + } + ReadableByteStreamControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('error'); + } + ReadableByteStreamControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ReadableByteStreamControllerClearPendingPullIntos(this); + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableByteStreamControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableByteStream; + if (this._queueTotalSize > 0) { + ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest); + return; + } + const autoAllocateChunkSize = this._autoAllocateChunkSize; + if (autoAllocateChunkSize !== undefined) { + let buffer; + try { + buffer = new ArrayBuffer(autoAllocateChunkSize); + } + catch (bufferE) { + readRequest._errorSteps(bufferE); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: autoAllocateChunkSize, + byteOffset: 0, + byteLength: autoAllocateChunkSize, + bytesFilled: 0, + minimumFill: 1, + elementSize: 1, + viewConstructor: Uint8Array, + readerType: 'default' + }; + this._pendingPullIntos.push(pullIntoDescriptor); + } + ReadableStreamAddReadRequest(stream, readRequest); + ReadableByteStreamControllerCallPullIfNeeded(this); + } + /** @internal */ + [ReleaseSteps]() { + if (this._pendingPullIntos.length > 0) { + const firstPullInto = this._pendingPullIntos.peek(); + firstPullInto.readerType = 'none'; + this._pendingPullIntos = new SimpleQueue(); + this._pendingPullIntos.push(firstPullInto); + } + } + } + Object.defineProperties(ReadableByteStreamController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + byobRequest: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(ReadableByteStreamController.prototype.close, 'close'); + setFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue'); + setFunctionName(ReadableByteStreamController.prototype.error, 'error'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, { + value: 'ReadableByteStreamController', + configurable: true + }); + } + // Abstract operations for the ReadableByteStreamController. + function IsReadableByteStreamController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) { + return false; + } + return x instanceof ReadableByteStreamController; + } + function IsReadableStreamBYOBRequest(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) { + return false; + } + return x instanceof ReadableStreamBYOBRequest; + } + function ReadableByteStreamControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableByteStreamControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + // TODO: Test controller argument + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableByteStreamControllerError(controller, e); + return null; + }); + } + function ReadableByteStreamControllerClearPendingPullIntos(controller) { + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + controller._pendingPullIntos = new SimpleQueue(); + } + function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) { + let done = false; + if (stream._state === 'closed') { + done = true; + } + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'default') { + ReadableStreamFulfillReadRequest(stream, filledView, done); + } + else { + ReadableStreamFulfillReadIntoRequest(stream, filledView, done); + } + } + function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) { + const bytesFilled = pullIntoDescriptor.bytesFilled; + const elementSize = pullIntoDescriptor.elementSize; + return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize); + } + function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) { + controller._queue.push({ buffer, byteOffset, byteLength }); + controller._queueTotalSize += byteLength; + } + function ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, buffer, byteOffset, byteLength) { + let clonedChunk; + try { + clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength); + } + catch (cloneE) { + ReadableByteStreamControllerError(controller, cloneE); + throw cloneE; + } + ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength); + } + function ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstDescriptor) { + if (firstDescriptor.bytesFilled > 0) { + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, firstDescriptor.buffer, firstDescriptor.byteOffset, firstDescriptor.bytesFilled); + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) { + const maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled); + const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy; + let totalBytesToCopyRemaining = maxBytesToCopy; + let ready = false; + const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize; + const maxAlignedBytes = maxBytesFilled - remainderBytes; + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) { + totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled; + ready = true; + } + const queue = controller._queue; + while (totalBytesToCopyRemaining > 0) { + const headOfQueue = queue.peek(); + const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength); + const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy); + if (headOfQueue.byteLength === bytesToCopy) { + queue.shift(); + } + else { + headOfQueue.byteOffset += bytesToCopy; + headOfQueue.byteLength -= bytesToCopy; + } + controller._queueTotalSize -= bytesToCopy; + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor); + totalBytesToCopyRemaining -= bytesToCopy; + } + return ready; + } + function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) { + pullIntoDescriptor.bytesFilled += size; + } + function ReadableByteStreamControllerHandleQueueDrain(controller) { + if (controller._queueTotalSize === 0 && controller._closeRequested) { + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(controller._controlledReadableByteStream); + } + else { + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + } + function ReadableByteStreamControllerInvalidateBYOBRequest(controller) { + if (controller._byobRequest === null) { + return; + } + controller._byobRequest._associatedReadableByteStreamController = undefined; + controller._byobRequest._view = null; + controller._byobRequest = null; + } + function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) { + while (controller._pendingPullIntos.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const pullIntoDescriptor = controller._pendingPullIntos.peek(); + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + } + } + } + function ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller) { + const reader = controller._controlledReadableByteStream._reader; + while (reader._readRequests.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const readRequest = reader._readRequests.shift(); + ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest); + } + } + function ReadableByteStreamControllerPullInto(controller, view, min, readIntoRequest) { + const stream = controller._controlledReadableByteStream; + const ctor = view.constructor; + const elementSize = arrayBufferViewElementSize(ctor); + const { byteOffset, byteLength } = view; + const minimumFill = min * elementSize; + let buffer; + try { + buffer = TransferArrayBuffer(view.buffer); + } + catch (e) { + readIntoRequest._errorSteps(e); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: buffer.byteLength, + byteOffset, + byteLength, + bytesFilled: 0, + minimumFill, + elementSize, + viewConstructor: ctor, + readerType: 'byob' + }; + if (controller._pendingPullIntos.length > 0) { + controller._pendingPullIntos.push(pullIntoDescriptor); + // No ReadableByteStreamControllerCallPullIfNeeded() call since: + // - No change happens on desiredSize + // - The source has already been notified of that there's at least 1 pending read(view) + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + return; + } + if (stream._state === 'closed') { + const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0); + readIntoRequest._closeSteps(emptyView); + return; + } + if (controller._queueTotalSize > 0) { + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + ReadableByteStreamControllerHandleQueueDrain(controller); + readIntoRequest._chunkSteps(filledView); + return; + } + if (controller._closeRequested) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + readIntoRequest._errorSteps(e); + return; + } + } + controller._pendingPullIntos.push(pullIntoDescriptor); + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) { + if (firstDescriptor.readerType === 'none') { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const stream = controller._controlledReadableByteStream; + if (ReadableStreamHasBYOBReader(stream)) { + while (ReadableStreamGetNumReadIntoRequests(stream) > 0) { + const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor); + } + } + } + function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) { + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + return; + } + if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) { + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + return; + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize; + if (remainderSize > 0) { + const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, pullIntoDescriptor.buffer, end - remainderSize, remainderSize); + } + pullIntoDescriptor.bytesFilled -= remainderSize; + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor); + } + else { + ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerShiftPendingPullInto(controller) { + const descriptor = controller._pendingPullIntos.shift(); + return descriptor; + } + function ReadableByteStreamControllerShouldCallPull(controller) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return false; + } + if (controller._closeRequested) { + return false; + } + if (!controller._started) { + return false; + } + if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; + } + function ReadableByteStreamControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + } + // A client of ReadableByteStreamController may use these functions directly to bypass state check. + function ReadableByteStreamControllerClose(controller) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + if (controller._queueTotalSize > 0) { + controller._closeRequested = true; + return; + } + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + throw e; + } + } + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } + function ReadableByteStreamControllerEnqueue(controller, chunk) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + const { buffer, byteOffset, byteLength } = chunk; + if (IsDetachedBuffer(buffer)) { + throw new TypeError('chunk\'s buffer is detached and so cannot be enqueued'); + } + const transferredBuffer = TransferArrayBuffer(buffer); + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (IsDetachedBuffer(firstPendingPullInto.buffer)) { + throw new TypeError('The BYOB request\'s buffer has been detached and so cannot be filled with an enqueued chunk'); + } + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer); + if (firstPendingPullInto.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto); + } + } + if (ReadableStreamHasDefaultReader(stream)) { + ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller); + if (ReadableStreamGetNumReadRequests(stream) === 0) { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + else { + if (controller._pendingPullIntos.length > 0) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength); + ReadableStreamFulfillReadRequest(stream, transferredView, false); + } + } + else if (ReadableStreamHasBYOBReader(stream)) { + // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully. + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + else { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerError(controller, e) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return; + } + ReadableByteStreamControllerClearPendingPullIntos(controller); + ResetQueue(controller); + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); + } + function ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest) { + const entry = controller._queue.shift(); + controller._queueTotalSize -= entry.byteLength; + ReadableByteStreamControllerHandleQueueDrain(controller); + const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength); + readRequest._chunkSteps(view); + } + function ReadableByteStreamControllerGetBYOBRequest(controller) { + if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled); + const byobRequest = Object.create(ReadableStreamBYOBRequest.prototype); + SetUpReadableStreamBYOBRequest(byobRequest, controller, view); + controller._byobRequest = byobRequest; + } + return controller._byobRequest; + } + function ReadableByteStreamControllerGetDesiredSize(controller) { + const state = controller._controlledReadableByteStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; + } + function ReadableByteStreamControllerRespond(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (bytesWritten !== 0) { + throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream'); + } + } + else { + if (bytesWritten === 0) { + throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream'); + } + if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) { + throw new RangeError('bytesWritten out of range'); + } + } + firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer); + ReadableByteStreamControllerRespondInternal(controller, bytesWritten); + } + function ReadableByteStreamControllerRespondWithNewView(controller, view) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (view.byteLength !== 0) { + throw new TypeError('The view\'s length must be 0 when calling respondWithNewView() on a closed stream'); + } + } + else { + if (view.byteLength === 0) { + throw new TypeError('The view\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'); + } + } + if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) { + throw new RangeError('The region specified by view does not match byobRequest'); + } + if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) { + throw new RangeError('The buffer of view has different capacity than byobRequest'); + } + if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) { + throw new RangeError('The region specified by view is larger than byobRequest'); + } + const viewByteLength = view.byteLength; + firstDescriptor.buffer = TransferArrayBuffer(view.buffer); + ReadableByteStreamControllerRespondInternal(controller, viewByteLength); + } + function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) { + controller._controlledReadableByteStream = stream; + controller._pullAgain = false; + controller._pulling = false; + controller._byobRequest = null; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._closeRequested = false; + controller._started = false; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._autoAllocateChunkSize = autoAllocateChunkSize; + controller._pendingPullIntos = new SimpleQueue(); + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableByteStreamControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableByteStreamControllerError(controller, r); + return null; + }); + } + function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) { + const controller = Object.create(ReadableByteStreamController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingByteSource.start !== undefined) { + startAlgorithm = () => underlyingByteSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingByteSource.pull !== undefined) { + pullAlgorithm = () => underlyingByteSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingByteSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingByteSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize; + if (autoAllocateChunkSize === 0) { + throw new TypeError('autoAllocateChunkSize must be greater than 0'); + } + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize); + } + function SetUpReadableStreamBYOBRequest(request, controller, view) { + request._associatedReadableByteStreamController = controller; + request._view = view; + } + // Helper functions for the ReadableStreamBYOBRequest. + function byobRequestBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`); + } + // Helper functions for the ReadableByteStreamController. + function byteStreamControllerBrandCheckException(name) { + return new TypeError(`ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`); + } + + function convertReaderOptions(options, context) { + assertDictionary(options, context); + const mode = options === null || options === void 0 ? void 0 : options.mode; + return { + mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`) + }; + } + function convertReadableStreamReaderMode(mode, context) { + mode = `${mode}`; + if (mode !== 'byob') { + throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`); + } + return mode; + } + function convertByobReadOptions(options, context) { + var _a; + assertDictionary(options, context); + const min = (_a = options === null || options === void 0 ? void 0 : options.min) !== null && _a !== void 0 ? _a : 1; + return { + min: convertUnsignedLongLongWithEnforceRange(min, `${context} has member 'min' that`) + }; + } + + // Abstract operations for the ReadableStream. + function AcquireReadableStreamBYOBReader(stream) { + return new ReadableStreamBYOBReader(stream); + } + // ReadableStream API exposed for controllers. + function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) { + stream._reader._readIntoRequests.push(readIntoRequest); + } + function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) { + const reader = stream._reader; + const readIntoRequest = reader._readIntoRequests.shift(); + if (done) { + readIntoRequest._closeSteps(chunk); + } + else { + readIntoRequest._chunkSteps(chunk); + } + } + function ReadableStreamGetNumReadIntoRequests(stream) { + return stream._reader._readIntoRequests.length; + } + function ReadableStreamHasBYOBReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamBYOBReader(reader)) { + return false; + } + return true; + } + /** + * A BYOB reader vended by a {@link ReadableStream}. + * + * @public + */ + class ReadableStreamBYOBReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + if (!IsReadableByteStreamController(stream._readableStreamController)) { + throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' + + 'source'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readIntoRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + read(view, rawOptions = {}) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('read')); + } + if (!ArrayBuffer.isView(view)) { + return promiseRejectedWith(new TypeError('view must be an array buffer view')); + } + if (view.byteLength === 0) { + return promiseRejectedWith(new TypeError('view must have non-zero byteLength')); + } + if (view.buffer.byteLength === 0) { + return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`)); + } + if (IsDetachedBuffer(view.buffer)) { + return promiseRejectedWith(new TypeError('view\'s buffer has been detached')); + } + let options; + try { + options = convertByobReadOptions(rawOptions, 'options'); + } + catch (e) { + return promiseRejectedWith(e); + } + const min = options.min; + if (min === 0) { + return promiseRejectedWith(new TypeError('options.min must be greater than 0')); + } + if (!isDataView(view)) { + if (min > view.length) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s length')); + } + } + else if (min > view.byteLength) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s byteLength')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readIntoRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: chunk => resolvePromise({ value: chunk, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamBYOBReader(this)) { + throw byobReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamBYOBReaderRelease(this); + } + } + Object.defineProperties(ReadableStreamBYOBReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } + }); + setFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel'); + setFunctionName(ReadableStreamBYOBReader.prototype.read, 'read'); + setFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBReader', + configurable: true + }); + } + // Abstract operations for the readers. + function IsReadableStreamBYOBReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) { + return false; + } + return x instanceof ReadableStreamBYOBReader; + } + function ReadableStreamBYOBReaderRead(reader, view, min, readIntoRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'errored') { + readIntoRequest._errorSteps(stream._storedError); + } + else { + ReadableByteStreamControllerPullInto(stream._readableStreamController, view, min, readIntoRequest); + } + } + function ReadableStreamBYOBReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } + function ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._errorSteps(e); + }); + } + // Helper functions for the ReadableStreamBYOBReader. + function byobReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`); + } + + function ExtractHighWaterMark(strategy, defaultHWM) { + const { highWaterMark } = strategy; + if (highWaterMark === undefined) { + return defaultHWM; + } + if (NumberIsNaN(highWaterMark) || highWaterMark < 0) { + throw new RangeError('Invalid highWaterMark'); + } + return highWaterMark; + } + function ExtractSizeAlgorithm(strategy) { + const { size } = strategy; + if (!size) { + return () => 1; + } + return size; + } + + function convertQueuingStrategy(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + const size = init === null || init === void 0 ? void 0 : init.size; + return { + highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark), + size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`) + }; + } + function convertQueuingStrategySize(fn, context) { + assertFunction(fn, context); + return chunk => convertUnrestrictedDouble(fn(chunk)); + } + + function convertUnderlyingSink(original, context) { + assertDictionary(original, context); + const abort = original === null || original === void 0 ? void 0 : original.abort; + const close = original === null || original === void 0 ? void 0 : original.close; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + const write = original === null || original === void 0 ? void 0 : original.write; + return { + abort: abort === undefined ? + undefined : + convertUnderlyingSinkAbortCallback(abort, original, `${context} has member 'abort' that`), + close: close === undefined ? + undefined : + convertUnderlyingSinkCloseCallback(close, original, `${context} has member 'close' that`), + start: start === undefined ? + undefined : + convertUnderlyingSinkStartCallback(start, original, `${context} has member 'start' that`), + write: write === undefined ? + undefined : + convertUnderlyingSinkWriteCallback(write, original, `${context} has member 'write' that`), + type + }; + } + function convertUnderlyingSinkAbortCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); + } + function convertUnderlyingSinkCloseCallback(fn, original, context) { + assertFunction(fn, context); + return () => promiseCall(fn, original, []); + } + function convertUnderlyingSinkStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); + } + function convertUnderlyingSinkWriteCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); + } + + function assertWritableStream(x, context) { + if (!IsWritableStream(x)) { + throw new TypeError(`${context} is not a WritableStream.`); + } + } + + function isAbortSignal(value) { + if (typeof value !== 'object' || value === null) { + return false; + } + try { + return typeof value.aborted === 'boolean'; + } + catch (_a) { + // AbortSignal.prototype.aborted throws if its brand check fails + return false; + } + } + const supportsAbortController = typeof AbortController === 'function'; + /** + * Construct a new AbortController, if supported by the platform. + * + * @internal + */ + function createAbortController() { + if (supportsAbortController) { + return new AbortController(); + } + return undefined; + } + + /** + * A writable stream represents a destination for data, into which you can write. + * + * @public + */ + class WritableStream { + constructor(rawUnderlyingSink = {}, rawStrategy = {}) { + if (rawUnderlyingSink === undefined) { + rawUnderlyingSink = null; + } + else { + assertObject(rawUnderlyingSink, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter'); + InitializeWritableStream(this); + const type = underlyingSink.type; + if (type !== undefined) { + throw new RangeError('Invalid type is specified'); + } + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm); + } + /** + * Returns whether or not the writable stream is locked to a writer. + */ + get locked() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('locked'); + } + return IsWritableStreamLocked(this); + } + /** + * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be + * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort + * mechanism of the underlying sink. + * + * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled + * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel + * the stream) if the stream is currently locked. + */ + abort(reason = undefined) { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('abort')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer')); + } + return WritableStreamAbort(this, reason); + } + /** + * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its + * close behavior. During this time any further attempts to write will fail (without erroring the stream). + * + * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream + * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with + * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked. + */ + close() { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('close')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer')); + } + if (WritableStreamCloseQueuedOrInFlight(this)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamClose(this); + } + /** + * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream + * is locked, no other writer can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to write to a stream + * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at + * the same time, which would cause the resulting written data to be unpredictable and probably useless. + */ + getWriter() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('getWriter'); + } + return AcquireWritableStreamDefaultWriter(this); + } + } + Object.defineProperties(WritableStream.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + getWriter: { enumerable: true }, + locked: { enumerable: true } + }); + setFunctionName(WritableStream.prototype.abort, 'abort'); + setFunctionName(WritableStream.prototype.close, 'close'); + setFunctionName(WritableStream.prototype.getWriter, 'getWriter'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, { + value: 'WritableStream', + configurable: true + }); + } + // Abstract operations for the WritableStream. + function AcquireWritableStreamDefaultWriter(stream) { + return new WritableStreamDefaultWriter(stream); + } + // Throws if and only if startAlgorithm throws. + function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(WritableStream.prototype); + InitializeWritableStream(stream); + const controller = Object.create(WritableStreamDefaultController.prototype); + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + return stream; + } + function InitializeWritableStream(stream) { + stream._state = 'writable'; + // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is + // 'erroring' or 'errored'. May be set to an undefined value. + stream._storedError = undefined; + stream._writer = undefined; + // Initialize to undefined first because the constructor of the controller checks this + // variable to validate the caller. + stream._writableStreamController = undefined; + // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data + // producer without waiting for the queued writes to finish. + stream._writeRequests = new SimpleQueue(); + // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents + // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here. + stream._inFlightWriteRequest = undefined; + // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer + // has been detached. + stream._closeRequest = undefined; + // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it + // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here. + stream._inFlightCloseRequest = undefined; + // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached. + stream._pendingAbortRequest = undefined; + // The backpressure signal set by the controller. + stream._backpressure = false; + } + function IsWritableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) { + return false; + } + return x instanceof WritableStream; + } + function IsWritableStreamLocked(stream) { + if (stream._writer === undefined) { + return false; + } + return true; + } + function WritableStreamAbort(stream, reason) { + var _a; + if (stream._state === 'closed' || stream._state === 'errored') { + return promiseResolvedWith(undefined); + } + stream._writableStreamController._abortReason = reason; + (_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort(reason); + // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring', + // but it doesn't know that signaling abort runs author code that might have changed the state. + // Widen the type again by casting to WritableStreamState. + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseResolvedWith(undefined); + } + if (stream._pendingAbortRequest !== undefined) { + return stream._pendingAbortRequest._promise; + } + let wasAlreadyErroring = false; + if (state === 'erroring') { + wasAlreadyErroring = true; + // reason will not be used, so don't keep a reference to it. + reason = undefined; + } + const promise = newPromise((resolve, reject) => { + stream._pendingAbortRequest = { + _promise: undefined, + _resolve: resolve, + _reject: reject, + _reason: reason, + _wasAlreadyErroring: wasAlreadyErroring + }; + }); + stream._pendingAbortRequest._promise = promise; + if (!wasAlreadyErroring) { + WritableStreamStartErroring(stream, reason); + } + return promise; + } + function WritableStreamClose(stream) { + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseRejectedWith(new TypeError(`The stream (in ${state} state) is not in the writable state and cannot be closed`)); + } + const promise = newPromise((resolve, reject) => { + const closeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._closeRequest = closeRequest; + }); + const writer = stream._writer; + if (writer !== undefined && stream._backpressure && state === 'writable') { + defaultWriterReadyPromiseResolve(writer); + } + WritableStreamDefaultControllerClose(stream._writableStreamController); + return promise; + } + // WritableStream API exposed for controllers. + function WritableStreamAddWriteRequest(stream) { + const promise = newPromise((resolve, reject) => { + const writeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._writeRequests.push(writeRequest); + }); + return promise; + } + function WritableStreamDealWithRejection(stream, error) { + const state = stream._state; + if (state === 'writable') { + WritableStreamStartErroring(stream, error); + return; + } + WritableStreamFinishErroring(stream); + } + function WritableStreamStartErroring(stream, reason) { + const controller = stream._writableStreamController; + stream._state = 'erroring'; + stream._storedError = reason; + const writer = stream._writer; + if (writer !== undefined) { + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason); + } + if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) { + WritableStreamFinishErroring(stream); + } + } + function WritableStreamFinishErroring(stream) { + stream._state = 'errored'; + stream._writableStreamController[ErrorSteps](); + const storedError = stream._storedError; + stream._writeRequests.forEach(writeRequest => { + writeRequest._reject(storedError); + }); + stream._writeRequests = new SimpleQueue(); + if (stream._pendingAbortRequest === undefined) { + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const abortRequest = stream._pendingAbortRequest; + stream._pendingAbortRequest = undefined; + if (abortRequest._wasAlreadyErroring) { + abortRequest._reject(storedError); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const promise = stream._writableStreamController[AbortSteps](abortRequest._reason); + uponPromise(promise, () => { + abortRequest._resolve(); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }, (reason) => { + abortRequest._reject(reason); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }); + } + function WritableStreamFinishInFlightWrite(stream) { + stream._inFlightWriteRequest._resolve(undefined); + stream._inFlightWriteRequest = undefined; + } + function WritableStreamFinishInFlightWriteWithError(stream, error) { + stream._inFlightWriteRequest._reject(error); + stream._inFlightWriteRequest = undefined; + WritableStreamDealWithRejection(stream, error); + } + function WritableStreamFinishInFlightClose(stream) { + stream._inFlightCloseRequest._resolve(undefined); + stream._inFlightCloseRequest = undefined; + const state = stream._state; + if (state === 'erroring') { + // The error was too late to do anything, so it is ignored. + stream._storedError = undefined; + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._resolve(); + stream._pendingAbortRequest = undefined; + } + } + stream._state = 'closed'; + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseResolve(writer); + } + } + function WritableStreamFinishInFlightCloseWithError(stream, error) { + stream._inFlightCloseRequest._reject(error); + stream._inFlightCloseRequest = undefined; + // Never execute sink abort() after sink close(). + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._reject(error); + stream._pendingAbortRequest = undefined; + } + WritableStreamDealWithRejection(stream, error); + } + // TODO(ricea): Fix alphabetical order. + function WritableStreamCloseQueuedOrInFlight(stream) { + if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; + } + function WritableStreamHasOperationMarkedInFlight(stream) { + if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; + } + function WritableStreamMarkCloseRequestInFlight(stream) { + stream._inFlightCloseRequest = stream._closeRequest; + stream._closeRequest = undefined; + } + function WritableStreamMarkFirstWriteRequestInFlight(stream) { + stream._inFlightWriteRequest = stream._writeRequests.shift(); + } + function WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) { + if (stream._closeRequest !== undefined) { + stream._closeRequest._reject(stream._storedError); + stream._closeRequest = undefined; + } + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseReject(writer, stream._storedError); + } + } + function WritableStreamUpdateBackpressure(stream, backpressure) { + const writer = stream._writer; + if (writer !== undefined && backpressure !== stream._backpressure) { + if (backpressure) { + defaultWriterReadyPromiseReset(writer); + } + else { + defaultWriterReadyPromiseResolve(writer); + } + } + stream._backpressure = backpressure; + } + /** + * A default writer vended by a {@link WritableStream}. + * + * @public + */ + class WritableStreamDefaultWriter { + constructor(stream) { + assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter'); + assertWritableStream(stream, 'First parameter'); + if (IsWritableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive writing by another writer'); + } + this._ownerWritableStream = stream; + stream._writer = this; + const state = stream._state; + if (state === 'writable') { + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) { + defaultWriterReadyPromiseInitialize(this); + } + else { + defaultWriterReadyPromiseInitializeAsResolved(this); + } + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'erroring') { + defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError); + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'closed') { + defaultWriterReadyPromiseInitializeAsResolved(this); + defaultWriterClosedPromiseInitializeAsResolved(this); + } + else { + const storedError = stream._storedError; + defaultWriterReadyPromiseInitializeAsRejected(this, storedError); + defaultWriterClosedPromiseInitializeAsRejected(this, storedError); + } + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the writer’s lock is released before the stream finishes closing. + */ + get closed() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full. + * A producer can use this information to determine the right amount of data to write. + * + * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort + * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when + * the writer’s lock is released. + */ + get desiredSize() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('desiredSize'); + } + if (this._ownerWritableStream === undefined) { + throw defaultWriterLockException('desiredSize'); + } + return WritableStreamDefaultWriterGetDesiredSize(this); + } + /** + * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions + * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips + * back to zero or below, the getter will return a new promise that stays pending until the next transition. + * + * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become + * rejected. + */ + get ready() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('ready')); + } + return this._readyPromise; + } + /** + * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}. + */ + abort(reason = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('abort')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('abort')); + } + return WritableStreamDefaultWriterAbort(this, reason); + } + /** + * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}. + */ + close() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('close')); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return promiseRejectedWith(defaultWriterLockException('close')); + } + if (WritableStreamCloseQueuedOrInFlight(stream)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamDefaultWriterClose(this); + } + /** + * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active. + * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from + * now on; otherwise, the writer will appear closed. + * + * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the + * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled). + * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents + * other producers from writing in an interleaved manner. + */ + releaseLock() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('releaseLock'); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return; + } + WritableStreamDefaultWriterRelease(this); + } + write(chunk = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('write')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + return WritableStreamDefaultWriterWrite(this, chunk); + } + } + Object.defineProperties(WritableStreamDefaultWriter.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + releaseLock: { enumerable: true }, + write: { enumerable: true }, + closed: { enumerable: true }, + desiredSize: { enumerable: true }, + ready: { enumerable: true } + }); + setFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort'); + setFunctionName(WritableStreamDefaultWriter.prototype.close, 'close'); + setFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock'); + setFunctionName(WritableStreamDefaultWriter.prototype.write, 'write'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultWriter', + configurable: true + }); + } + // Abstract operations for the WritableStreamDefaultWriter. + function IsWritableStreamDefaultWriter(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultWriter; + } + // A client of WritableStreamDefaultWriter may use these functions directly to bypass state check. + function WritableStreamDefaultWriterAbort(writer, reason) { + const stream = writer._ownerWritableStream; + return WritableStreamAbort(stream, reason); + } + function WritableStreamDefaultWriterClose(writer) { + const stream = writer._ownerWritableStream; + return WritableStreamClose(stream); + } + function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseResolvedWith(undefined); + } + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + return WritableStreamDefaultWriterClose(writer); + } + function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) { + if (writer._closedPromiseState === 'pending') { + defaultWriterClosedPromiseReject(writer, error); + } + else { + defaultWriterClosedPromiseResetToRejected(writer, error); + } + } + function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) { + if (writer._readyPromiseState === 'pending') { + defaultWriterReadyPromiseReject(writer, error); + } + else { + defaultWriterReadyPromiseResetToRejected(writer, error); + } + } + function WritableStreamDefaultWriterGetDesiredSize(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (state === 'errored' || state === 'erroring') { + return null; + } + if (state === 'closed') { + return 0; + } + return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController); + } + function WritableStreamDefaultWriterRelease(writer) { + const stream = writer._ownerWritableStream; + const releasedError = new TypeError(`Writer was released and can no longer be used to monitor the stream's closedness`); + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError); + // The state transitions to "errored" before the sink abort() method runs, but the writer.closed promise is not + // rejected until afterwards. This means that simply testing state will not work. + WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError); + stream._writer = undefined; + writer._ownerWritableStream = undefined; + } + function WritableStreamDefaultWriterWrite(writer, chunk) { + const stream = writer._ownerWritableStream; + const controller = stream._writableStreamController; + const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk); + if (stream !== writer._ownerWritableStream) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + const state = stream._state; + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to')); + } + if (state === 'erroring') { + return promiseRejectedWith(stream._storedError); + } + const promise = WritableStreamAddWriteRequest(stream); + WritableStreamDefaultControllerWrite(controller, chunk, chunkSize); + return promise; + } + const closeSentinel = {}; + /** + * Allows control of a {@link WritableStream | writable stream}'s state and internal queue. + * + * @public + */ + class WritableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted. + * + * @deprecated + * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177. + * Use {@link WritableStreamDefaultController.signal}'s `reason` instead. + */ + get abortReason() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('abortReason'); + } + return this._abortReason; + } + /** + * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted. + */ + get signal() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('signal'); + } + if (this._abortController === undefined) { + // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`. + // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill, + // so instead we only implement support for `signal` if we find a global `AbortController` constructor. + throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported'); + } + return this._abortController.signal; + } + /** + * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`. + * + * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying + * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the + * normal lifecycle of interactions with the underlying sink. + */ + error(e = undefined) { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('error'); + } + const state = this._controlledWritableStream._state; + if (state !== 'writable') { + // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so + // just treat it as a no-op. + return; + } + WritableStreamDefaultControllerError(this, e); + } + /** @internal */ + [AbortSteps](reason) { + const result = this._abortAlgorithm(reason); + WritableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [ErrorSteps]() { + ResetQueue(this); + } + } + Object.defineProperties(WritableStreamDefaultController.prototype, { + abortReason: { enumerable: true }, + signal: { enumerable: true }, + error: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultController', + configurable: true + }); + } + // Abstract operations implementing interface required by the WritableStream. + function IsWritableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultController; + } + function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledWritableStream = stream; + stream._writableStreamController = controller; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._abortReason = undefined; + controller._abortController = createAbortController(); + controller._started = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._writeAlgorithm = writeAlgorithm; + controller._closeAlgorithm = closeAlgorithm; + controller._abortAlgorithm = abortAlgorithm; + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + const startResult = startAlgorithm(); + const startPromise = promiseResolvedWith(startResult); + uponPromise(startPromise, () => { + controller._started = true; + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, r => { + controller._started = true; + WritableStreamDealWithRejection(stream, r); + return null; + }); + } + function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) { + const controller = Object.create(WritableStreamDefaultController.prototype); + let startAlgorithm; + let writeAlgorithm; + let closeAlgorithm; + let abortAlgorithm; + if (underlyingSink.start !== undefined) { + startAlgorithm = () => underlyingSink.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSink.write !== undefined) { + writeAlgorithm = chunk => underlyingSink.write(chunk, controller); + } + else { + writeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.close !== undefined) { + closeAlgorithm = () => underlyingSink.close(); + } + else { + closeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.abort !== undefined) { + abortAlgorithm = reason => underlyingSink.abort(reason); + } + else { + abortAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + } + // ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls. + function WritableStreamDefaultControllerClearAlgorithms(controller) { + controller._writeAlgorithm = undefined; + controller._closeAlgorithm = undefined; + controller._abortAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; + } + function WritableStreamDefaultControllerClose(controller) { + EnqueueValueWithSize(controller, closeSentinel, 0); + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + } + function WritableStreamDefaultControllerGetChunkSize(controller, chunk) { + try { + return controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE); + return 1; + } + } + function WritableStreamDefaultControllerGetDesiredSize(controller) { + return controller._strategyHWM - controller._queueTotalSize; + } + function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) { + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE); + return; + } + const stream = controller._controlledWritableStream; + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + } + // Abstract operations for the WritableStreamDefaultController. + function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) { + const stream = controller._controlledWritableStream; + if (!controller._started) { + return; + } + if (stream._inFlightWriteRequest !== undefined) { + return; + } + const state = stream._state; + if (state === 'erroring') { + WritableStreamFinishErroring(stream); + return; + } + if (controller._queue.length === 0) { + return; + } + const value = PeekQueueValue(controller); + if (value === closeSentinel) { + WritableStreamDefaultControllerProcessClose(controller); + } + else { + WritableStreamDefaultControllerProcessWrite(controller, value); + } + } + function WritableStreamDefaultControllerErrorIfNeeded(controller, error) { + if (controller._controlledWritableStream._state === 'writable') { + WritableStreamDefaultControllerError(controller, error); + } + } + function WritableStreamDefaultControllerProcessClose(controller) { + const stream = controller._controlledWritableStream; + WritableStreamMarkCloseRequestInFlight(stream); + DequeueValue(controller); + const sinkClosePromise = controller._closeAlgorithm(); + WritableStreamDefaultControllerClearAlgorithms(controller); + uponPromise(sinkClosePromise, () => { + WritableStreamFinishInFlightClose(stream); + return null; + }, reason => { + WritableStreamFinishInFlightCloseWithError(stream, reason); + return null; + }); + } + function WritableStreamDefaultControllerProcessWrite(controller, chunk) { + const stream = controller._controlledWritableStream; + WritableStreamMarkFirstWriteRequestInFlight(stream); + const sinkWritePromise = controller._writeAlgorithm(chunk); + uponPromise(sinkWritePromise, () => { + WritableStreamFinishInFlightWrite(stream); + const state = stream._state; + DequeueValue(controller); + if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, reason => { + if (stream._state === 'writable') { + WritableStreamDefaultControllerClearAlgorithms(controller); + } + WritableStreamFinishInFlightWriteWithError(stream, reason); + return null; + }); + } + function WritableStreamDefaultControllerGetBackpressure(controller) { + const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller); + return desiredSize <= 0; + } + // A client of WritableStreamDefaultController may use these functions directly to bypass state check. + function WritableStreamDefaultControllerError(controller, error) { + const stream = controller._controlledWritableStream; + WritableStreamDefaultControllerClearAlgorithms(controller); + WritableStreamStartErroring(stream, error); + } + // Helper functions for the WritableStream. + function streamBrandCheckException$2(name) { + return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`); + } + // Helper functions for the WritableStreamDefaultController. + function defaultControllerBrandCheckException$2(name) { + return new TypeError(`WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`); + } + // Helper functions for the WritableStreamDefaultWriter. + function defaultWriterBrandCheckException(name) { + return new TypeError(`WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`); + } + function defaultWriterLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released writer'); + } + function defaultWriterClosedPromiseInitialize(writer) { + writer._closedPromise = newPromise((resolve, reject) => { + writer._closedPromise_resolve = resolve; + writer._closedPromise_reject = reject; + writer._closedPromiseState = 'pending'; + }); + } + function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseReject(writer, reason); + } + function defaultWriterClosedPromiseInitializeAsResolved(writer) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseResolve(writer); + } + function defaultWriterClosedPromiseReject(writer, reason) { + if (writer._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._closedPromise); + writer._closedPromise_reject(reason); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'rejected'; + } + function defaultWriterClosedPromiseResetToRejected(writer, reason) { + defaultWriterClosedPromiseInitializeAsRejected(writer, reason); + } + function defaultWriterClosedPromiseResolve(writer) { + if (writer._closedPromise_resolve === undefined) { + return; + } + writer._closedPromise_resolve(undefined); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'resolved'; + } + function defaultWriterReadyPromiseInitialize(writer) { + writer._readyPromise = newPromise((resolve, reject) => { + writer._readyPromise_resolve = resolve; + writer._readyPromise_reject = reject; + }); + writer._readyPromiseState = 'pending'; + } + function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseReject(writer, reason); + } + function defaultWriterReadyPromiseInitializeAsResolved(writer) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseResolve(writer); + } + function defaultWriterReadyPromiseReject(writer, reason) { + if (writer._readyPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._readyPromise); + writer._readyPromise_reject(reason); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'rejected'; + } + function defaultWriterReadyPromiseReset(writer) { + defaultWriterReadyPromiseInitialize(writer); + } + function defaultWriterReadyPromiseResetToRejected(writer, reason) { + defaultWriterReadyPromiseInitializeAsRejected(writer, reason); + } + function defaultWriterReadyPromiseResolve(writer) { + if (writer._readyPromise_resolve === undefined) { + return; + } + writer._readyPromise_resolve(undefined); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'fulfilled'; + } + + /// + function getGlobals() { + if (typeof globalThis !== 'undefined') { + return globalThis; + } + else if (typeof self !== 'undefined') { + return self; + } + else if (typeof global !== 'undefined') { + return global; + } + return undefined; + } + const globals = getGlobals(); + + /// + function isDOMExceptionConstructor(ctor) { + if (!(typeof ctor === 'function' || typeof ctor === 'object')) { + return false; + } + if (ctor.name !== 'DOMException') { + return false; + } + try { + new ctor(); + return true; + } + catch (_a) { + return false; + } + } + /** + * Support: + * - Web browsers + * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87) + */ + function getFromGlobal() { + const ctor = globals === null || globals === void 0 ? void 0 : globals.DOMException; + return isDOMExceptionConstructor(ctor) ? ctor : undefined; + } + /** + * Support: + * - All platforms + */ + function createPolyfill() { + // eslint-disable-next-line @typescript-eslint/no-shadow + const ctor = function DOMException(message, name) { + this.message = message || ''; + this.name = name || 'Error'; + if (Error.captureStackTrace) { + Error.captureStackTrace(this, this.constructor); + } + }; + setFunctionName(ctor, 'DOMException'); + ctor.prototype = Object.create(Error.prototype); + Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true }); + return ctor; + } + // eslint-disable-next-line @typescript-eslint/no-redeclare + const DOMException = getFromGlobal() || createPolyfill(); + + function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) { + const reader = AcquireReadableStreamDefaultReader(source); + const writer = AcquireWritableStreamDefaultWriter(dest); + source._disturbed = true; + let shuttingDown = false; + // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown. + let currentWrite = promiseResolvedWith(undefined); + return newPromise((resolve, reject) => { + let abortAlgorithm; + if (signal !== undefined) { + abortAlgorithm = () => { + const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError'); + const actions = []; + if (!preventAbort) { + actions.push(() => { + if (dest._state === 'writable') { + return WritableStreamAbort(dest, error); + } + return promiseResolvedWith(undefined); + }); + } + if (!preventCancel) { + actions.push(() => { + if (source._state === 'readable') { + return ReadableStreamCancel(source, error); + } + return promiseResolvedWith(undefined); + }); + } + shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error); + }; + if (signal.aborted) { + abortAlgorithm(); + return; + } + signal.addEventListener('abort', abortAlgorithm); + } + // Using reader and writer, read all chunks from this and write them to dest + // - Backpressure must be enforced + // - Shutdown must stop all activity + function pipeLoop() { + return newPromise((resolveLoop, rejectLoop) => { + function next(done) { + if (done) { + resolveLoop(); + } + else { + // Use `PerformPromiseThen` instead of `uponPromise` to avoid + // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers + PerformPromiseThen(pipeStep(), next, rejectLoop); + } + } + next(false); + }); + } + function pipeStep() { + if (shuttingDown) { + return promiseResolvedWith(true); + } + return PerformPromiseThen(writer._readyPromise, () => { + return newPromise((resolveRead, rejectRead) => { + ReadableStreamDefaultReaderRead(reader, { + _chunkSteps: chunk => { + currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop); + resolveRead(false); + }, + _closeSteps: () => resolveRead(true), + _errorSteps: rejectRead + }); + }); + }); + } + // Errors must be propagated forward + isOrBecomesErrored(source, reader._closedPromise, storedError => { + if (!preventAbort) { + shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Errors must be propagated backward + isOrBecomesErrored(dest, writer._closedPromise, storedError => { + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Closing must be propagated forward + isOrBecomesClosed(source, reader._closedPromise, () => { + if (!preventClose) { + shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer)); + } + else { + shutdown(); + } + return null; + }); + // Closing must be propagated backward + if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') { + const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it'); + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed); + } + else { + shutdown(true, destClosed); + } + } + setPromiseIsHandledToTrue(pipeLoop()); + function waitForWritesToFinish() { + // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait + // for that too. + const oldCurrentWrite = currentWrite; + return PerformPromiseThen(currentWrite, () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined); + } + function isOrBecomesErrored(stream, promise, action) { + if (stream._state === 'errored') { + action(stream._storedError); + } + else { + uponRejection(promise, action); + } + } + function isOrBecomesClosed(stream, promise, action) { + if (stream._state === 'closed') { + action(); + } + else { + uponFulfillment(promise, action); + } + } + function shutdownWithAction(action, originalIsError, originalError) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), doTheRest); + } + else { + doTheRest(); + } + function doTheRest() { + uponPromise(action(), () => finalize(originalIsError, originalError), newError => finalize(true, newError)); + return null; + } + } + function shutdown(isError, error) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error)); + } + else { + finalize(isError, error); + } + } + function finalize(isError, error) { + WritableStreamDefaultWriterRelease(writer); + ReadableStreamReaderGenericRelease(reader); + if (signal !== undefined) { + signal.removeEventListener('abort', abortAlgorithm); + } + if (isError) { + reject(error); + } + else { + resolve(undefined); + } + return null; + } + }); + } + + /** + * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue. + * + * @public + */ + class ReadableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('desiredSize'); + } + return ReadableStreamDefaultControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('close'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits close'); + } + ReadableStreamDefaultControllerClose(this); + } + enqueue(chunk = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('enqueue'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits enqueue'); + } + return ReadableStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('error'); + } + ReadableStreamDefaultControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableStream; + if (this._queue.length > 0) { + const chunk = DequeueValue(this); + if (this._closeRequested && this._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(this); + ReadableStreamClose(stream); + } + else { + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + readRequest._chunkSteps(chunk); + } + else { + ReadableStreamAddReadRequest(stream, readRequest); + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + } + /** @internal */ + [ReleaseSteps]() { + // Do nothing. + } + } + Object.defineProperties(ReadableStreamDefaultController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(ReadableStreamDefaultController.prototype.close, 'close'); + setFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue'); + setFunctionName(ReadableStreamDefaultController.prototype.error, 'error'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultController', + configurable: true + }); + } + // Abstract operations for the ReadableStreamDefaultController. + function IsReadableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) { + return false; + } + return x instanceof ReadableStreamDefaultController; + } + function ReadableStreamDefaultControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableStreamDefaultControllerError(controller, e); + return null; + }); + } + function ReadableStreamDefaultControllerShouldCallPull(controller) { + const stream = controller._controlledReadableStream; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return false; + } + if (!controller._started) { + return false; + } + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; + } + function ReadableStreamDefaultControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; + } + // A client of ReadableStreamDefaultController may use these functions directly to bypass state check. + function ReadableStreamDefaultControllerClose(controller) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + controller._closeRequested = true; + if (controller._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } + } + function ReadableStreamDefaultControllerEnqueue(controller, chunk) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + ReadableStreamFulfillReadRequest(stream, chunk, false); + } + else { + let chunkSize; + try { + chunkSize = controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + ReadableStreamDefaultControllerError(controller, chunkSizeE); + throw chunkSizeE; + } + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + ReadableStreamDefaultControllerError(controller, enqueueE); + throw enqueueE; + } + } + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + function ReadableStreamDefaultControllerError(controller, e) { + const stream = controller._controlledReadableStream; + if (stream._state !== 'readable') { + return; + } + ResetQueue(controller); + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); + } + function ReadableStreamDefaultControllerGetDesiredSize(controller) { + const state = controller._controlledReadableStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; + } + // This is used in the implementation of TransformStream. + function ReadableStreamDefaultControllerHasBackpressure(controller) { + if (ReadableStreamDefaultControllerShouldCallPull(controller)) { + return false; + } + return true; + } + function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) { + const state = controller._controlledReadableStream._state; + if (!controller._closeRequested && state === 'readable') { + return true; + } + return false; + } + function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledReadableStream = stream; + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._started = false; + controller._closeRequested = false; + controller._pullAgain = false; + controller._pulling = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableStreamDefaultControllerError(controller, r); + return null; + }); + } + function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) { + const controller = Object.create(ReadableStreamDefaultController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingSource.start !== undefined) { + startAlgorithm = () => underlyingSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSource.pull !== undefined) { + pullAlgorithm = () => underlyingSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + } + // Helper functions for the ReadableStreamDefaultController. + function defaultControllerBrandCheckException$1(name) { + return new TypeError(`ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`); + } + + function ReadableStreamTee(stream, cloneForBranch2) { + if (IsReadableByteStreamController(stream._readableStreamController)) { + return ReadableByteStreamTee(stream); + } + return ReadableStreamDefaultTee(stream); + } + function ReadableStreamDefaultTee(stream, cloneForBranch2) { + const reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgain = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function pullAlgorithm() { + if (reading) { + readAgain = true; + return promiseResolvedWith(undefined); + } + reading = true; + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgain = false; + const chunk1 = chunk; + const chunk2 = chunk; + // There is no way to access the cloning code right now in the reference implementation. + // If we add one then we'll need an implementation for serializable objects. + // if (!canceled2 && cloneForBranch2) { + // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2)); + // } + if (!canceled1) { + ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgain) { + pullAlgorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableStreamDefaultControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableStreamDefaultControllerClose(branch2._readableStreamController); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + // do nothing + } + branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm); + branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm); + uponRejection(reader._closedPromise, (r) => { + ReadableStreamDefaultControllerError(branch1._readableStreamController, r); + ReadableStreamDefaultControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + return [branch1, branch2]; + } + function ReadableByteStreamTee(stream) { + let reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgainForBranch1 = false; + let readAgainForBranch2 = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function forwardReaderError(thisReader) { + uponRejection(thisReader._closedPromise, r => { + if (thisReader !== reader) { + return null; + } + ReadableByteStreamControllerError(branch1._readableStreamController, r); + ReadableByteStreamControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + } + function pullWithDefaultReader() { + if (IsReadableStreamBYOBReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamDefaultReader(stream); + forwardReaderError(reader); + } + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const chunk1 = chunk; + let chunk2 = chunk; + if (!canceled1 && !canceled2) { + try { + chunk2 = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(branch1._readableStreamController, cloneE); + ReadableByteStreamControllerError(branch2._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + } + if (!canceled1) { + ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableByteStreamControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableByteStreamControllerClose(branch2._readableStreamController); + } + if (branch1._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch1._readableStreamController, 0); + } + if (branch2._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch2._readableStreamController, 0); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + } + function pullWithBYOBReader(view, forBranch2) { + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamBYOBReader(stream); + forwardReaderError(reader); + } + const byobBranch = forBranch2 ? branch2 : branch1; + const otherBranch = forBranch2 ? branch1 : branch2; + const readIntoRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!otherCanceled) { + let clonedChunk; + try { + clonedChunk = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE); + ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk); + } + else if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: chunk => { + reading = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!byobCanceled) { + ReadableByteStreamControllerClose(byobBranch._readableStreamController); + } + if (!otherCanceled) { + ReadableByteStreamControllerClose(otherBranch._readableStreamController); + } + if (chunk !== undefined) { + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0); + } + } + if (!byobCanceled || !otherCanceled) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest); + } + function pull1Algorithm() { + if (reading) { + readAgainForBranch1 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, false); + } + return promiseResolvedWith(undefined); + } + function pull2Algorithm() { + if (reading) { + readAgainForBranch2 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, true); + } + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + return; + } + branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm); + branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm); + forwardReaderError(reader); + return [branch1, branch2]; + } + + function isReadableStreamLike(stream) { + return typeIsObject(stream) && typeof stream.getReader !== 'undefined'; + } + + function ReadableStreamFrom(source) { + if (isReadableStreamLike(source)) { + return ReadableStreamFromDefaultReader(source.getReader()); + } + return ReadableStreamFromIterable(source); + } + function ReadableStreamFromIterable(asyncIterable) { + let stream; + const iteratorRecord = GetIterator(asyncIterable, 'async'); + const startAlgorithm = noop; + function pullAlgorithm() { + let nextResult; + try { + nextResult = IteratorNext(iteratorRecord); + } + catch (e) { + return promiseRejectedWith(e); + } + const nextPromise = promiseResolvedWith(nextResult); + return transformPromiseWith(nextPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object'); + } + const done = IteratorComplete(iterResult); + if (done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = IteratorValue(iterResult); + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + const iterator = iteratorRecord.iterator; + let returnMethod; + try { + returnMethod = GetMethod(iterator, 'return'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (returnMethod === undefined) { + return promiseResolvedWith(undefined); + } + let returnResult; + try { + returnResult = reflectCall(returnMethod, iterator, [reason]); + } + catch (e) { + return promiseRejectedWith(e); + } + const returnPromise = promiseResolvedWith(returnResult); + return transformPromiseWith(returnPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object'); + } + return undefined; + }); + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; + } + function ReadableStreamFromDefaultReader(reader) { + let stream; + const startAlgorithm = noop; + function pullAlgorithm() { + let readPromise; + try { + readPromise = reader.read(); + } + catch (e) { + return promiseRejectedWith(e); + } + return transformPromiseWith(readPromise, readResult => { + if (!typeIsObject(readResult)) { + throw new TypeError('The promise returned by the reader.read() method must fulfill with an object'); + } + if (readResult.done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = readResult.value; + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + try { + return promiseResolvedWith(reader.cancel(reason)); + } + catch (e) { + return promiseRejectedWith(e); + } + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; + } + + function convertUnderlyingDefaultOrByteSource(source, context) { + assertDictionary(source, context); + const original = source; + const autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize; + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const pull = original === null || original === void 0 ? void 0 : original.pull; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + return { + autoAllocateChunkSize: autoAllocateChunkSize === undefined ? + undefined : + convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, `${context} has member 'autoAllocateChunkSize' that`), + cancel: cancel === undefined ? + undefined : + convertUnderlyingSourceCancelCallback(cancel, original, `${context} has member 'cancel' that`), + pull: pull === undefined ? + undefined : + convertUnderlyingSourcePullCallback(pull, original, `${context} has member 'pull' that`), + start: start === undefined ? + undefined : + convertUnderlyingSourceStartCallback(start, original, `${context} has member 'start' that`), + type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`) + }; + } + function convertUnderlyingSourceCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); + } + function convertUnderlyingSourcePullCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); + } + function convertUnderlyingSourceStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); + } + function convertReadableStreamType(type, context) { + type = `${type}`; + if (type !== 'bytes') { + throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`); + } + return type; + } + + function convertIteratorOptions(options, context) { + assertDictionary(options, context); + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + return { preventCancel: Boolean(preventCancel) }; + } + + function convertPipeOptions(options, context) { + assertDictionary(options, context); + const preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort; + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + const preventClose = options === null || options === void 0 ? void 0 : options.preventClose; + const signal = options === null || options === void 0 ? void 0 : options.signal; + if (signal !== undefined) { + assertAbortSignal(signal, `${context} has member 'signal' that`); + } + return { + preventAbort: Boolean(preventAbort), + preventCancel: Boolean(preventCancel), + preventClose: Boolean(preventClose), + signal + }; + } + function assertAbortSignal(signal, context) { + if (!isAbortSignal(signal)) { + throw new TypeError(`${context} is not an AbortSignal.`); + } + } + + function convertReadableWritablePair(pair, context) { + assertDictionary(pair, context); + const readable = pair === null || pair === void 0 ? void 0 : pair.readable; + assertRequiredField(readable, 'readable', 'ReadableWritablePair'); + assertReadableStream(readable, `${context} has member 'readable' that`); + const writable = pair === null || pair === void 0 ? void 0 : pair.writable; + assertRequiredField(writable, 'writable', 'ReadableWritablePair'); + assertWritableStream(writable, `${context} has member 'writable' that`); + return { readable, writable }; + } + + /** + * A readable stream represents a source of data, from which you can read. + * + * @public + */ + class ReadableStream { + constructor(rawUnderlyingSource = {}, rawStrategy = {}) { + if (rawUnderlyingSource === undefined) { + rawUnderlyingSource = null; + } + else { + assertObject(rawUnderlyingSource, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter'); + InitializeReadableStream(this); + if (underlyingSource.type === 'bytes') { + if (strategy.size !== undefined) { + throw new RangeError('The strategy for a byte stream cannot have a size function'); + } + const highWaterMark = ExtractHighWaterMark(strategy, 0); + SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark); + } + else { + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm); + } + } + /** + * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}. + */ + get locked() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('locked'); + } + return IsReadableStreamLocked(this); + } + /** + * Cancels the stream, signaling a loss of interest in the stream by a consumer. + * + * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()} + * method, which might or might not use it. + */ + cancel(reason = undefined) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('cancel')); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader')); + } + return ReadableStreamCancel(this, reason); + } + getReader(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('getReader'); + } + const options = convertReaderOptions(rawOptions, 'First parameter'); + if (options.mode === undefined) { + return AcquireReadableStreamDefaultReader(this); + } + return AcquireReadableStreamBYOBReader(this); + } + pipeThrough(rawTransform, rawOptions = {}) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('pipeThrough'); + } + assertRequiredArgument(rawTransform, 1, 'pipeThrough'); + const transform = convertReadableWritablePair(rawTransform, 'First parameter'); + const options = convertPipeOptions(rawOptions, 'Second parameter'); + if (IsReadableStreamLocked(this)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream'); + } + if (IsWritableStreamLocked(transform.writable)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream'); + } + const promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + setPromiseIsHandledToTrue(promise); + return transform.readable; + } + pipeTo(destination, rawOptions = {}) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('pipeTo')); + } + if (destination === undefined) { + return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`); + } + if (!IsWritableStream(destination)) { + return promiseRejectedWith(new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)); + } + let options; + try { + options = convertPipeOptions(rawOptions, 'Second parameter'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')); + } + if (IsWritableStreamLocked(destination)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')); + } + return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + } + /** + * Tees this readable stream, returning a two-element array containing the two resulting branches as + * new {@link ReadableStream} instances. + * + * Teeing a stream will lock it, preventing any other consumer from acquiring a reader. + * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be + * propagated to the stream's underlying source. + * + * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable, + * this could allow interference between the two branches. + */ + tee() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('tee'); + } + const branches = ReadableStreamTee(this); + return CreateArrayFromList(branches); + } + values(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('values'); + } + const options = convertIteratorOptions(rawOptions, 'First parameter'); + return AcquireReadableStreamAsyncIterator(this, options.preventCancel); + } + [SymbolAsyncIterator](options) { + // Stub implementation, overridden below + return this.values(options); + } + /** + * Creates a new ReadableStream wrapping the provided iterable or async iterable. + * + * This can be used to adapt various kinds of objects into a readable stream, + * such as an array, an async generator, or a Node.js readable stream. + */ + static from(asyncIterable) { + return ReadableStreamFrom(asyncIterable); + } + } + Object.defineProperties(ReadableStream, { + from: { enumerable: true } + }); + Object.defineProperties(ReadableStream.prototype, { + cancel: { enumerable: true }, + getReader: { enumerable: true }, + pipeThrough: { enumerable: true }, + pipeTo: { enumerable: true }, + tee: { enumerable: true }, + values: { enumerable: true }, + locked: { enumerable: true } + }); + setFunctionName(ReadableStream.from, 'from'); + setFunctionName(ReadableStream.prototype.cancel, 'cancel'); + setFunctionName(ReadableStream.prototype.getReader, 'getReader'); + setFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough'); + setFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo'); + setFunctionName(ReadableStream.prototype.tee, 'tee'); + setFunctionName(ReadableStream.prototype.values, 'values'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, { + value: 'ReadableStream', + configurable: true + }); + } + Object.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, { + value: ReadableStream.prototype.values, + writable: true, + configurable: true + }); + // Abstract operations for the ReadableStream. + // Throws if and only if startAlgorithm throws. + function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableStreamDefaultController.prototype); + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + return stream; + } + // Throws if and only if startAlgorithm throws. + function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableByteStreamController.prototype); + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined); + return stream; + } + function InitializeReadableStream(stream) { + stream._state = 'readable'; + stream._reader = undefined; + stream._storedError = undefined; + stream._disturbed = false; + } + function IsReadableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) { + return false; + } + return x instanceof ReadableStream; + } + function IsReadableStreamLocked(stream) { + if (stream._reader === undefined) { + return false; + } + return true; + } + // ReadableStream API exposed for controllers. + function ReadableStreamCancel(stream, reason) { + stream._disturbed = true; + if (stream._state === 'closed') { + return promiseResolvedWith(undefined); + } + if (stream._state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + ReadableStreamClose(stream); + const reader = stream._reader; + if (reader !== undefined && IsReadableStreamBYOBReader(reader)) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._closeSteps(undefined); + }); + } + const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason); + return transformPromiseWith(sourceCancelPromise, noop); + } + function ReadableStreamClose(stream) { + stream._state = 'closed'; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseResolve(reader); + if (IsReadableStreamDefaultReader(reader)) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._closeSteps(); + }); + } + } + function ReadableStreamError(stream, e) { + stream._state = 'errored'; + stream._storedError = e; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseReject(reader, e); + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + else { + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } + } + // Helper functions for the ReadableStream. + function streamBrandCheckException$1(name) { + return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`); + } + + function convertQueuingStrategyInit(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit'); + return { + highWaterMark: convertUnrestrictedDouble(highWaterMark) + }; + } + + // The size function must not have a prototype property nor be a constructor + const byteLengthSizeFunction = (chunk) => { + return chunk.byteLength; + }; + setFunctionName(byteLengthSizeFunction, 'size'); + /** + * A queuing strategy that counts the number of bytes in each chunk. + * + * @public + */ + class ByteLengthQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('highWaterMark'); + } + return this._byteLengthQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by returning the value of its `byteLength` property. + */ + get size() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('size'); + } + return byteLengthSizeFunction; + } + } + Object.defineProperties(ByteLengthQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'ByteLengthQueuingStrategy', + configurable: true + }); + } + // Helper functions for the ByteLengthQueuingStrategy. + function byteLengthBrandCheckException(name) { + return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`); + } + function IsByteLengthQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof ByteLengthQueuingStrategy; + } + + // The size function must not have a prototype property nor be a constructor + const countSizeFunction = () => { + return 1; + }; + setFunctionName(countSizeFunction, 'size'); + /** + * A queuing strategy that counts the number of chunks. + * + * @public + */ + class CountQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'CountQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._countQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('highWaterMark'); + } + return this._countQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by always returning 1. + * This ensures that the total queue size is a count of the number of chunks in the queue. + */ + get size() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('size'); + } + return countSizeFunction; + } + } + Object.defineProperties(CountQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'CountQueuingStrategy', + configurable: true + }); + } + // Helper functions for the CountQueuingStrategy. + function countBrandCheckException(name) { + return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`); + } + function IsCountQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof CountQueuingStrategy; + } + + function convertTransformer(original, context) { + assertDictionary(original, context); + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const flush = original === null || original === void 0 ? void 0 : original.flush; + const readableType = original === null || original === void 0 ? void 0 : original.readableType; + const start = original === null || original === void 0 ? void 0 : original.start; + const transform = original === null || original === void 0 ? void 0 : original.transform; + const writableType = original === null || original === void 0 ? void 0 : original.writableType; + return { + cancel: cancel === undefined ? + undefined : + convertTransformerCancelCallback(cancel, original, `${context} has member 'cancel' that`), + flush: flush === undefined ? + undefined : + convertTransformerFlushCallback(flush, original, `${context} has member 'flush' that`), + readableType, + start: start === undefined ? + undefined : + convertTransformerStartCallback(start, original, `${context} has member 'start' that`), + transform: transform === undefined ? + undefined : + convertTransformerTransformCallback(transform, original, `${context} has member 'transform' that`), + writableType + }; + } + function convertTransformerFlushCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); + } + function convertTransformerStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); + } + function convertTransformerTransformCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); + } + function convertTransformerCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); + } + + // Class TransformStream + /** + * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream}, + * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side. + * In a manner specific to the transform stream in question, writes to the writable side result in new data being + * made available for reading from the readable side. + * + * @public + */ + class TransformStream { + constructor(rawTransformer = {}, rawWritableStrategy = {}, rawReadableStrategy = {}) { + if (rawTransformer === undefined) { + rawTransformer = null; + } + const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter'); + const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter'); + const transformer = convertTransformer(rawTransformer, 'First parameter'); + if (transformer.readableType !== undefined) { + throw new RangeError('Invalid readableType specified'); + } + if (transformer.writableType !== undefined) { + throw new RangeError('Invalid writableType specified'); + } + const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0); + const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy); + const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1); + const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy); + let startPromise_resolve; + const startPromise = newPromise(resolve => { + startPromise_resolve = resolve; + }); + InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + SetUpTransformStreamDefaultControllerFromTransformer(this, transformer); + if (transformer.start !== undefined) { + startPromise_resolve(transformer.start(this._transformStreamController)); + } + else { + startPromise_resolve(undefined); + } + } + /** + * The readable side of the transform stream. + */ + get readable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('readable'); + } + return this._readable; + } + /** + * The writable side of the transform stream. + */ + get writable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('writable'); + } + return this._writable; + } + } + Object.defineProperties(TransformStream.prototype, { + readable: { enumerable: true }, + writable: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, { + value: 'TransformStream', + configurable: true + }); + } + function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) { + function startAlgorithm() { + return startPromise; + } + function writeAlgorithm(chunk) { + return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk); + } + function abortAlgorithm(reason) { + return TransformStreamDefaultSinkAbortAlgorithm(stream, reason); + } + function closeAlgorithm() { + return TransformStreamDefaultSinkCloseAlgorithm(stream); + } + stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm); + function pullAlgorithm() { + return TransformStreamDefaultSourcePullAlgorithm(stream); + } + function cancelAlgorithm(reason) { + return TransformStreamDefaultSourceCancelAlgorithm(stream, reason); + } + stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure. + stream._backpressure = undefined; + stream._backpressureChangePromise = undefined; + stream._backpressureChangePromise_resolve = undefined; + TransformStreamSetBackpressure(stream, true); + stream._transformStreamController = undefined; + } + function IsTransformStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) { + return false; + } + return x instanceof TransformStream; + } + // This is a no-op if both sides are already errored. + function TransformStreamError(stream, e) { + ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e); + TransformStreamErrorWritableAndUnblockWrite(stream, e); + } + function TransformStreamErrorWritableAndUnblockWrite(stream, e) { + TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController); + WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e); + TransformStreamUnblockWrite(stream); + } + function TransformStreamUnblockWrite(stream) { + if (stream._backpressure) { + // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure() + // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time + // _backpressure is set. + TransformStreamSetBackpressure(stream, false); + } + } + function TransformStreamSetBackpressure(stream, backpressure) { + // Passes also when called during construction. + if (stream._backpressureChangePromise !== undefined) { + stream._backpressureChangePromise_resolve(); + } + stream._backpressureChangePromise = newPromise(resolve => { + stream._backpressureChangePromise_resolve = resolve; + }); + stream._backpressure = backpressure; + } + // Class TransformStreamDefaultController + /** + * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}. + * + * @public + */ + class TransformStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full. + */ + get desiredSize() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('desiredSize'); + } + const readableController = this._controlledTransformStream._readable._readableStreamController; + return ReadableStreamDefaultControllerGetDesiredSize(readableController); + } + enqueue(chunk = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('enqueue'); + } + TransformStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors both the readable side and the writable side of the controlled transform stream, making all future + * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded. + */ + error(reason = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('error'); + } + TransformStreamDefaultControllerError(this, reason); + } + /** + * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the + * transformer only needs to consume a portion of the chunks written to the writable side. + */ + terminate() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('terminate'); + } + TransformStreamDefaultControllerTerminate(this); + } + } + Object.defineProperties(TransformStreamDefaultController.prototype, { + enqueue: { enumerable: true }, + error: { enumerable: true }, + terminate: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue'); + setFunctionName(TransformStreamDefaultController.prototype.error, 'error'); + setFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'TransformStreamDefaultController', + configurable: true + }); + } + // Transform Stream Default Controller Abstract Operations + function IsTransformStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) { + return false; + } + return x instanceof TransformStreamDefaultController; + } + function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm) { + controller._controlledTransformStream = stream; + stream._transformStreamController = controller; + controller._transformAlgorithm = transformAlgorithm; + controller._flushAlgorithm = flushAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._finishPromise = undefined; + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) { + const controller = Object.create(TransformStreamDefaultController.prototype); + let transformAlgorithm; + let flushAlgorithm; + let cancelAlgorithm; + if (transformer.transform !== undefined) { + transformAlgorithm = chunk => transformer.transform(chunk, controller); + } + else { + transformAlgorithm = chunk => { + try { + TransformStreamDefaultControllerEnqueue(controller, chunk); + return promiseResolvedWith(undefined); + } + catch (transformResultE) { + return promiseRejectedWith(transformResultE); + } + }; + } + if (transformer.flush !== undefined) { + flushAlgorithm = () => transformer.flush(controller); + } + else { + flushAlgorithm = () => promiseResolvedWith(undefined); + } + if (transformer.cancel !== undefined) { + cancelAlgorithm = reason => transformer.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm); + } + function TransformStreamDefaultControllerClearAlgorithms(controller) { + controller._transformAlgorithm = undefined; + controller._flushAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + } + function TransformStreamDefaultControllerEnqueue(controller, chunk) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) { + throw new TypeError('Readable side is not in a state that permits enqueue'); + } + // We throttle transform invocations based on the backpressure of the ReadableStream, but we still + // accept TransformStreamDefaultControllerEnqueue() calls. + try { + ReadableStreamDefaultControllerEnqueue(readableController, chunk); + } + catch (e) { + // This happens when readableStrategy.size() throws. + TransformStreamErrorWritableAndUnblockWrite(stream, e); + throw stream._readable._storedError; + } + const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController); + if (backpressure !== stream._backpressure) { + TransformStreamSetBackpressure(stream, true); + } + } + function TransformStreamDefaultControllerError(controller, e) { + TransformStreamError(controller._controlledTransformStream, e); + } + function TransformStreamDefaultControllerPerformTransform(controller, chunk) { + const transformPromise = controller._transformAlgorithm(chunk); + return transformPromiseWith(transformPromise, undefined, r => { + TransformStreamError(controller._controlledTransformStream, r); + throw r; + }); + } + function TransformStreamDefaultControllerTerminate(controller) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + ReadableStreamDefaultControllerClose(readableController); + const error = new TypeError('TransformStream terminated'); + TransformStreamErrorWritableAndUnblockWrite(stream, error); + } + // TransformStreamDefaultSink Algorithms + function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) { + const controller = stream._transformStreamController; + if (stream._backpressure) { + const backpressureChangePromise = stream._backpressureChangePromise; + return transformPromiseWith(backpressureChangePromise, () => { + const writable = stream._writable; + const state = writable._state; + if (state === 'erroring') { + throw writable._storedError; + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + }); + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + } + function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally, + // we don't run the _cancelAlgorithm again. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerError(readable._readableStreamController, reason); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + function TransformStreamDefaultSinkCloseAlgorithm(stream) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally, + // we don't also run the _cancelAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const flushPromise = controller._flushAlgorithm(); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(flushPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerClose(readable._readableStreamController); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + // TransformStreamDefaultSource Algorithms + function TransformStreamDefaultSourcePullAlgorithm(stream) { + // Invariant. Enforced by the promises returned by start() and pull(). + TransformStreamSetBackpressure(stream, false); + // Prevent the next pull() call until there is backpressure. + return stream._backpressureChangePromise; + } + function TransformStreamDefaultSourceCancelAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._writable cannot change after construction, so caching it across a call to user code is safe. + const writable = stream._writable; + // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or + // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the + // _flushAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (writable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, writable._storedError); + } + else { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + // Helper functions for the TransformStreamDefaultController. + function defaultControllerBrandCheckException(name) { + return new TypeError(`TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`); + } + function defaultControllerFinishPromiseResolve(controller) { + if (controller._finishPromise_resolve === undefined) { + return; + } + controller._finishPromise_resolve(); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + function defaultControllerFinishPromiseReject(controller, reason) { + if (controller._finishPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(controller._finishPromise); + controller._finishPromise_reject(reason); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + // Helper functions for the TransformStream. + function streamBrandCheckException(name) { + return new TypeError(`TransformStream.prototype.${name} can only be used on a TransformStream`); + } + + const exports$1 = { + ReadableStream, + ReadableStreamDefaultController, + ReadableByteStreamController, + ReadableStreamBYOBRequest, + ReadableStreamDefaultReader, + ReadableStreamBYOBReader, + WritableStream, + WritableStreamDefaultController, + WritableStreamDefaultWriter, + ByteLengthQueuingStrategy, + CountQueuingStrategy, + TransformStream, + TransformStreamDefaultController + }; + // Add classes to global scope + if (typeof globals !== 'undefined') { + for (const prop in exports$1) { + if (Object.prototype.hasOwnProperty.call(exports$1, prop)) { + Object.defineProperty(globals, prop, { + value: exports$1[prop], + writable: true, + configurable: true + }); + } + } + } + + exports.ByteLengthQueuingStrategy = ByteLengthQueuingStrategy; + exports.CountQueuingStrategy = CountQueuingStrategy; + exports.ReadableByteStreamController = ReadableByteStreamController; + exports.ReadableStream = ReadableStream; + exports.ReadableStreamBYOBReader = ReadableStreamBYOBReader; + exports.ReadableStreamBYOBRequest = ReadableStreamBYOBRequest; + exports.ReadableStreamDefaultController = ReadableStreamDefaultController; + exports.ReadableStreamDefaultReader = ReadableStreamDefaultReader; + exports.TransformStream = TransformStream; + exports.TransformStreamDefaultController = TransformStreamDefaultController; + exports.WritableStream = WritableStream; + exports.WritableStreamDefaultController = WritableStreamDefaultController; + exports.WritableStreamDefaultWriter = WritableStreamDefaultWriter; + +})); +//# sourceMappingURL=polyfill.es2018.js.map diff --git a/node_modules/web-streams-polyfill/dist/polyfill.es2018.js.map b/node_modules/web-streams-polyfill/dist/polyfill.es2018.js.map new file mode 100644 index 00000000..cffe625b --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/polyfill.es2018.js.map @@ -0,0 +1 @@ +{"version":3,"file":"polyfill.es2018.js","sources":["../src/utils.ts","../src/lib/helpers/miscellaneous.ts","../src/lib/helpers/webidl.ts","../src/lib/simple-queue.ts","../src/lib/abstract-ops/internal-methods.ts","../src/lib/readable-stream/generic-reader.ts","../src/stub/number-isfinite.ts","../src/stub/math-trunc.ts","../src/lib/validators/basic.ts","../src/lib/validators/readable-stream.ts","../src/lib/readable-stream/default-reader.ts","../src/target/es2018/stub/async-iterator-prototype.ts","../src/lib/readable-stream/async-iterator.ts","../src/stub/number-isnan.ts","../src/lib/abstract-ops/ecmascript.ts","../src/lib/abstract-ops/miscellaneous.ts","../src/lib/abstract-ops/queue-with-sizes.ts","../src/lib/helpers/array-buffer-view.ts","../src/lib/readable-stream/byte-stream-controller.ts","../src/lib/validators/reader-options.ts","../src/lib/readable-stream/byob-reader.ts","../src/lib/abstract-ops/queuing-strategy.ts","../src/lib/validators/queuing-strategy.ts","../src/lib/validators/underlying-sink.ts","../src/lib/validators/writable-stream.ts","../src/lib/abort-signal.ts","../src/lib/writable-stream.ts","../src/globals.ts","../src/stub/dom-exception.ts","../src/lib/readable-stream/pipe.ts","../src/lib/readable-stream/default-controller.ts","../src/lib/readable-stream/tee.ts","../src/lib/readable-stream/readable-stream-like.ts","../src/lib/readable-stream/from.ts","../src/lib/validators/underlying-source.ts","../src/lib/validators/iterator-options.ts","../src/lib/validators/pipe-options.ts","../src/lib/validators/readable-writable-pair.ts","../src/lib/readable-stream.ts","../src/lib/validators/queuing-strategy-init.ts","../src/lib/byte-length-queuing-strategy.ts","../src/lib/count-queuing-strategy.ts","../src/lib/validators/transformer.ts","../src/lib/transform-stream.ts","../src/polyfill.ts"],"sourcesContent":["export function noop(): undefined {\n return undefined;\n}\n","import { noop } from '../../utils';\nimport { AssertionError } from '../../stub/assert';\n\nexport function typeIsObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport const rethrowAssertionErrorRejection: (e: any) => void =\n DEBUG ? e => {\n // Used throughout the reference implementation, as `.catch(rethrowAssertionErrorRejection)`, to ensure any errors\n // get shown. There are places in the spec where we do promise transformations and purposefully ignore or don't\n // expect any errors, but assertion errors are always problematic.\n if (e && e instanceof AssertionError) {\n setTimeout(() => {\n throw e;\n }, 0);\n }\n } : noop;\n\nexport function setFunctionName(fn: Function, name: string): void {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n } catch {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n}\n","import { rethrowAssertionErrorRejection } from './miscellaneous';\nimport assert from '../../stub/assert';\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\n\n// https://webidl.spec.whatwg.org/#a-new-promise\nexport function newPromise(executor: (\n resolve: (value: T | PromiseLike) => void,\n reject: (reason?: any) => void\n) => void): Promise {\n return new originalPromise(executor);\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-resolved-with\nexport function promiseResolvedWith(value: T | PromiseLike): Promise {\n return newPromise(resolve => resolve(value));\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-rejected-with\nexport function promiseRejectedWith(reason: any): Promise {\n return originalPromiseReject(reason);\n}\n\nexport function PerformPromiseThen(\n promise: Promise,\n onFulfilled?: (value: T) => TResult1 | PromiseLike,\n onRejected?: (reason: any) => TResult2 | PromiseLike): Promise {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected) as Promise;\n}\n\n// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n// from that handler. To prevent this, return null instead of void from all handlers.\n// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\nexport function uponPromise(\n promise: Promise,\n onFulfilled?: (value: T) => null | PromiseLike,\n onRejected?: (reason: any) => null | PromiseLike): void {\n PerformPromiseThen(\n PerformPromiseThen(promise, onFulfilled, onRejected),\n undefined,\n rethrowAssertionErrorRejection\n );\n}\n\nexport function uponFulfillment(promise: Promise, onFulfilled: (value: T) => null | PromiseLike): void {\n uponPromise(promise, onFulfilled);\n}\n\nexport function uponRejection(promise: Promise, onRejected: (reason: any) => null | PromiseLike): void {\n uponPromise(promise, undefined, onRejected);\n}\n\nexport function transformPromiseWith(\n promise: Promise,\n fulfillmentHandler?: (value: T) => TResult1 | PromiseLike,\n rejectionHandler?: (reason: any) => TResult2 | PromiseLike): Promise {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\n\nexport function setPromiseIsHandledToTrue(promise: Promise): void {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\nlet _queueMicrotask: (callback: () => void) => void = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n } else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n};\n\nexport { _queueMicrotask as queueMicrotask };\n\nexport function reflectCall(F: (this: T, ...fnArgs: A) => R, V: T, args: A): R {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n}\n\nexport function promiseCall(F: (this: T, ...fnArgs: A) => R | PromiseLike,\n V: T,\n args: A): Promise {\n assert(typeof F === 'function');\n assert(V !== undefined);\n assert(Array.isArray(args));\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n } catch (value) {\n return promiseRejectedWith(value);\n }\n}\n","import assert from '../stub/assert';\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n\ninterface Node {\n _elements: T[];\n _next: Node | undefined;\n}\n\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nexport class SimpleQueue {\n private _front: Node;\n private _back: Node;\n private _cursor = 0;\n private _size = 0;\n\n constructor() {\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n\n get length(): number {\n return this._size;\n }\n\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element: T): void {\n const oldBack = this._back;\n let newBack = oldBack;\n assert(oldBack._next === undefined);\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n assert(elements.length === QUEUE_MAX_ARRAY_SIZE);\n assert(oldFront._next !== undefined);\n newFront = oldFront._next!;\n newCursor = 0;\n }\n\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined!;\n\n return element;\n }\n\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback: (element: T) => void): void {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n assert(node._next !== undefined);\n assert(i === QUEUE_MAX_ARRAY_SIZE);\n node = node._next!;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n}\n","export const AbortSteps = Symbol('[[AbortSteps]]');\nexport const ErrorSteps = Symbol('[[ErrorSteps]]');\nexport const CancelSteps = Symbol('[[CancelSteps]]');\nexport const PullSteps = Symbol('[[PullSteps]]');\nexport const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n","import assert from '../../stub/assert';\nimport { ReadableStream, ReadableStreamCancel, type ReadableStreamReader } from '../readable-stream';\nimport { newPromise, setPromiseIsHandledToTrue } from '../helpers/webidl';\nimport { ReleaseSteps } from '../abstract-ops/internal-methods';\n\nexport function ReadableStreamReaderGenericInitialize(reader: ReadableStreamReader, stream: ReadableStream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n } else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n } else {\n assert(stream._state === 'errored');\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n}\n\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\n\nexport function ReadableStreamReaderGenericCancel(reader: ReadableStreamReader, reason: any): Promise {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n return ReadableStreamCancel(stream, reason);\n}\n\nexport function ReadableStreamReaderGenericRelease(reader: ReadableStreamReader) {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n assert(stream._reader === reader);\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n } else {\n defaultReaderClosedPromiseResetToRejected(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n\n stream._readableStreamController[ReleaseSteps]();\n\n stream._reader = undefined;\n reader._ownerReadableStream = undefined!;\n}\n\n// Helper functions for the readers.\n\nexport function readerLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nexport function defaultReaderClosedPromiseInitialize(reader: ReadableStreamReader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n}\n\nexport function defaultReaderClosedPromiseInitializeAsRejected(reader: ReadableStreamReader, reason: any) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseInitializeAsResolved(reader: ReadableStreamReader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n}\n\nexport function defaultReaderClosedPromiseReject(reader: ReadableStreamReader, reason: any) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n\nexport function defaultReaderClosedPromiseResetToRejected(reader: ReadableStreamReader, reason: any) {\n assert(reader._closedPromise_resolve === undefined);\n assert(reader._closedPromise_reject === undefined);\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseResolve(reader: ReadableStreamReader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite: typeof Number.isFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n};\n\nexport default NumberIsFinite;\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc: typeof Math.trunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\nexport default MathTrunc;\n","import NumberIsFinite from '../../stub/number-isfinite';\nimport MathTrunc from '../../stub/math-trunc';\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nexport function isDictionary(x: any): x is object | null {\n return typeof x === 'object' || typeof x === 'function';\n}\n\nexport function assertDictionary(obj: unknown,\n context: string): asserts obj is object | null | undefined {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport type AnyFunction = (...args: any[]) => any;\n\n// https://heycam.github.io/webidl/#idl-callback-functions\nexport function assertFunction(x: unknown, context: string): asserts x is AnyFunction {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-object\nexport function isObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport function assertObject(x: unknown,\n context: string): asserts x is object {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport function assertRequiredArgument(x: T | undefined,\n position: number,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n}\n\nexport function assertRequiredField(x: T | undefined,\n field: string,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nexport function convertUnrestrictedDouble(value: unknown): number {\n return Number(value);\n}\n\nfunction censorNegativeZero(x: number): number {\n return x === 0 ? 0 : x;\n}\n\nfunction integerPart(x: number): number {\n return censorNegativeZero(MathTrunc(x));\n}\n\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nexport function convertUnsignedLongLongWithEnforceRange(value: unknown, context: string): number {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n\n let x = Number(value);\n x = censorNegativeZero(x);\n\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n\n x = integerPart(x);\n\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n\n return x;\n}\n","import { IsReadableStream, ReadableStream } from '../readable-stream';\n\nexport function assertReadableStream(x: unknown, context: string): asserts x is ReadableStream {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, ReadableStream } from '../readable-stream';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { PullSteps } from '../abstract-ops/internal-methods';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\n\n/**\n * A result returned by {@link ReadableStreamDefaultReader.read}.\n *\n * @public\n */\nexport type ReadableStreamDefaultReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value?: undefined;\n}\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamDefaultReader(stream: ReadableStream): ReadableStreamDefaultReader {\n return new ReadableStreamDefaultReader(stream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadRequest(stream: ReadableStream,\n readRequest: ReadRequest): void {\n assert(IsReadableStreamDefaultReader(stream._reader));\n assert(stream._state === 'readable');\n\n (stream._reader! as ReadableStreamDefaultReader)._readRequests.push(readRequest);\n}\n\nexport function ReadableStreamFulfillReadRequest(stream: ReadableStream, chunk: R | undefined, done: boolean) {\n const reader = stream._reader as ReadableStreamDefaultReader;\n\n assert(reader._readRequests.length > 0);\n\n const readRequest = reader._readRequests.shift()!;\n if (done) {\n readRequest._closeSteps();\n } else {\n readRequest._chunkSteps(chunk!);\n }\n}\n\nexport function ReadableStreamGetNumReadRequests(stream: ReadableStream): number {\n return (stream._reader as ReadableStreamDefaultReader)._readRequests.length;\n}\n\nexport function ReadableStreamHasDefaultReader(stream: ReadableStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadRequest {\n _chunkSteps(chunk: R): void;\n\n _closeSteps(): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamDefaultReader {\n /** @internal */\n _ownerReadableStream!: ReadableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(): Promise> {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamDefaultReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamDefaultReader(x: any): x is ReadableStreamDefaultReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultReader;\n}\n\nexport function ReadableStreamDefaultReaderRead(reader: ReadableStreamDefaultReader,\n readRequest: ReadRequest): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n } else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n } else {\n assert(stream._state === 'readable');\n stream._readableStreamController[PullSteps](readRequest as ReadRequest);\n }\n}\n\nexport function ReadableStreamDefaultReaderRelease(reader: ReadableStreamDefaultReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n}\n\nexport function ReadableStreamDefaultReaderErrorReadRequests(reader: ReadableStreamDefaultReader, e: any) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nfunction defaultReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n","/// \n\n/* eslint-disable @typescript-eslint/no-empty-function */\nexport const AsyncIteratorPrototype: AsyncIterable =\n Object.getPrototypeOf(Object.getPrototypeOf(async function* (): AsyncIterableIterator {}).prototype);\n","/// \n\nimport { ReadableStream } from '../readable-stream';\nimport {\n AcquireReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadableStreamDefaultReadResult,\n type ReadRequest\n} from './default-reader';\nimport { ReadableStreamReaderGenericCancel, ReadableStreamReaderGenericRelease } from './generic-reader';\nimport assert from '../../stub/assert';\nimport { AsyncIteratorPrototype } from '@@target/stub/async-iterator-prototype';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n queueMicrotask,\n transformPromiseWith\n} from '../helpers/webidl';\n\n/**\n * An async iterator returned by {@link ReadableStream.values}.\n *\n * @public\n */\nexport interface ReadableStreamAsyncIterator extends AsyncIterableIterator {\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nexport class ReadableStreamAsyncIteratorImpl {\n private readonly _reader: ReadableStreamDefaultReader;\n private readonly _preventCancel: boolean;\n private _ongoingPromise: Promise> | undefined = undefined;\n private _isFinished = false;\n\n constructor(reader: ReadableStreamDefaultReader, preventCancel: boolean) {\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n\n next(): Promise> {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n\n return(value: any): Promise> {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n\n private _nextSteps(): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n\n private _returnSteps(value: any): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n assert(reader._readRequests.length === 0);\n\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n}\n\ninterface ReadableStreamAsyncIteratorInstance extends ReadableStreamAsyncIterator {\n /** @interal */\n _asyncIteratorImpl: ReadableStreamAsyncIteratorImpl;\n\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nconst ReadableStreamAsyncIteratorPrototype: ReadableStreamAsyncIteratorInstance = {\n next(this: ReadableStreamAsyncIteratorInstance): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n\n return(this: ReadableStreamAsyncIteratorInstance, value: any): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n} as any;\nObject.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamAsyncIterator(stream: ReadableStream,\n preventCancel: boolean): ReadableStreamAsyncIterator {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator: ReadableStreamAsyncIteratorInstance = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n}\n\nfunction IsReadableStreamAsyncIterator(x: any): x is ReadableStreamAsyncIterator {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n\n try {\n // noinspection SuspiciousTypeOfGuard\n return (x as ReadableStreamAsyncIteratorInstance)._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n } catch {\n return false;\n }\n}\n\n// Helper functions for the ReadableStream.\n\nfunction streamAsyncIteratorBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN: typeof Number.isNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n};\n\nexport default NumberIsNaN;\n","import { reflectCall } from 'lib/helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport assert from '../../stub/assert';\n\ndeclare global {\n interface ArrayBuffer {\n readonly detached: boolean;\n\n transfer(): ArrayBuffer;\n }\n\n function structuredClone(value: T, options: { transfer: ArrayBuffer[] }): T;\n}\n\nexport function CreateArrayFromList(elements: T): T {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice() as T;\n}\n\nexport function CopyDataBlockBytes(dest: ArrayBuffer,\n destOffset: number,\n src: ArrayBuffer,\n srcOffset: number,\n n: number) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n\nexport let TransferArrayBuffer = (O: ArrayBuffer): ArrayBuffer => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n } else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n } else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n};\n\nexport function CanTransferArrayBuffer(O: ArrayBuffer): boolean {\n return !IsDetachedBuffer(O);\n}\n\nexport let IsDetachedBuffer = (O: ArrayBuffer): boolean => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n } else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n};\n\nexport function ArrayBufferSlice(buffer: ArrayBuffer, begin: number, end: number): ArrayBuffer {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n}\n\nexport type MethodName = {\n [P in keyof T]: T[P] extends Function | undefined ? P : never;\n}[keyof T];\n\nexport function GetMethod>(receiver: T, prop: K): T[K] | undefined {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n}\n\nexport interface SyncIteratorRecord {\n iterator: Iterator,\n nextMethod: Iterator['next'],\n done: boolean;\n}\n\nexport interface AsyncIteratorRecord {\n iterator: AsyncIterator,\n nextMethod: AsyncIterator['next'],\n done: boolean;\n}\n\nexport type SyncOrAsyncIteratorRecord = SyncIteratorRecord | AsyncIteratorRecord;\n\nexport function CreateAsyncFromSyncIterator(syncIteratorRecord: SyncIteratorRecord): AsyncIteratorRecord {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n}\n\n// Aligns with core-js/modules/es.symbol.async-iterator.js\nexport const SymbolAsyncIterator: (typeof Symbol)['asyncIterator'] =\n Symbol.asyncIterator ??\n Symbol.for?.('Symbol.asyncIterator') ??\n '@@asyncIterator';\n\nexport type SyncOrAsyncIterable = Iterable | AsyncIterable;\nexport type SyncOrAsyncIteratorMethod = () => (Iterator | AsyncIterator);\n\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint: 'async',\n method?: SyncOrAsyncIteratorMethod\n): AsyncIteratorRecord;\nfunction GetIterator(\n obj: Iterable,\n hint: 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncIteratorRecord;\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint = 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncOrAsyncIteratorRecord {\n assert(hint === 'sync' || hint === 'async');\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj as AsyncIterable, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj as Iterable, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj as Iterable, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n } else {\n method = GetMethod(obj as Iterable, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false } as SyncOrAsyncIteratorRecord;\n}\n\nexport { GetIterator };\n\nexport function IteratorNext(iteratorRecord: AsyncIteratorRecord): Promise> {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n}\n\nexport function IteratorComplete(\n iterResult: IteratorResult\n): iterResult is IteratorReturnResult {\n assert(typeIsObject(iterResult));\n return Boolean(iterResult.done);\n}\n\nexport function IteratorValue(iterResult: IteratorYieldResult): T {\n assert(typeIsObject(iterResult));\n return iterResult.value;\n}\n","import NumberIsNaN from '../../stub/number-isnan';\nimport { ArrayBufferSlice } from './ecmascript';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function IsNonNegativeNumber(v: number): boolean {\n if (typeof v !== 'number') {\n return false;\n }\n\n if (NumberIsNaN(v)) {\n return false;\n }\n\n if (v < 0) {\n return false;\n }\n\n return true;\n}\n\nexport function CloneAsUint8Array(O: NonShared): NonShared {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer) as NonShared;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsNonNegativeNumber } from './miscellaneous';\n\nexport interface QueueContainer {\n _queue: SimpleQueue;\n _queueTotalSize: number;\n}\n\nexport interface QueuePair {\n value: T;\n size: number;\n}\n\nexport function DequeueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.shift()!;\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n\n return pair.value;\n}\n\nexport function EnqueueValueWithSize(container: QueueContainer>, value: T, size: number) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n}\n\nexport function PeekQueueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.peek();\n return pair.value;\n}\n\nexport function ResetQueue(container: QueueContainer) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n}\n","export type TypedArray =\n | Int8Array\n | Uint8Array\n | Uint8ClampedArray\n | Int16Array\n | Uint16Array\n | Int32Array\n | Uint32Array\n | Float32Array\n | Float64Array;\n\nexport type NonShared = T & {\n buffer: ArrayBuffer;\n}\n\nexport interface ArrayBufferViewConstructor {\n new(buffer: ArrayBuffer, byteOffset: number, length?: number): T;\n\n readonly prototype: T;\n}\n\nexport interface TypedArrayConstructor extends ArrayBufferViewConstructor {\n readonly BYTES_PER_ELEMENT: number;\n}\n\nexport type DataViewConstructor = ArrayBufferViewConstructor;\n\nfunction isDataViewConstructor(ctor: Function): ctor is DataViewConstructor {\n return ctor === DataView;\n}\n\nexport function isDataView(view: ArrayBufferView): view is DataView {\n return isDataViewConstructor(view.constructor);\n}\n\nexport function arrayBufferViewElementSize(ctor: ArrayBufferViewConstructor): number {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return (ctor as unknown as TypedArrayConstructor).BYTES_PER_ELEMENT;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n IsReadableStreamDefaultReader,\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n ReadableStreamHasDefaultReader,\n type ReadRequest\n} from './default-reader';\nimport {\n ReadableStreamAddReadIntoRequest,\n ReadableStreamFulfillReadIntoRequest,\n ReadableStreamGetNumReadIntoRequests,\n ReadableStreamHasBYOBReader,\n type ReadIntoRequest\n} from './byob-reader';\nimport NumberIsInteger from '../../stub/number-isinteger';\nimport {\n IsReadableStreamLocked,\n type ReadableByteStream,\n ReadableStreamClose,\n ReadableStreamError\n} from '../readable-stream';\nimport type { ValidatedUnderlyingByteSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport {\n ArrayBufferSlice,\n CanTransferArrayBuffer,\n CopyDataBlockBytes,\n IsDetachedBuffer,\n TransferArrayBuffer\n} from '../abstract-ops/ecmascript';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\nimport { assertRequiredArgument, convertUnsignedLongLongWithEnforceRange } from '../validators/basic';\nimport {\n type ArrayBufferViewConstructor,\n arrayBufferViewElementSize,\n type NonShared,\n type TypedArrayConstructor\n} from '../helpers/array-buffer-view';\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nexport class ReadableStreamBYOBRequest {\n /** @internal */\n _associatedReadableByteStreamController!: ReadableByteStreamController;\n /** @internal */\n _view!: NonShared | null;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view(): ArrayBufferView | null {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n\n return this._view;\n }\n\n /**\n * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into\n * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer.\n *\n * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer\n * modifiable.\n */\n respond(bytesWritten: number): void;\n respond(bytesWritten: number | undefined): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(this._view!.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n\n assert(this._view!.byteLength > 0);\n assert(this._view!.buffer.byteLength > 0);\n\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n\n /**\n * Indicates to the associated readable byte stream that instead of writing into\n * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`,\n * which will be given to the consumer of the readable byte stream.\n *\n * After this method is called, `view` will be transferred and no longer modifiable.\n */\n respondWithNewView(view: ArrayBufferView): void;\n respondWithNewView(view: NonShared): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n}\n\ninterface ByteQueueElement {\n buffer: ArrayBuffer;\n byteOffset: number;\n byteLength: number;\n}\n\ntype PullIntoDescriptor = NonShared> =\n DefaultPullIntoDescriptor\n | BYOBPullIntoDescriptor;\n\ninterface DefaultPullIntoDescriptor {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: TypedArrayConstructor;\n readerType: 'default' | 'none';\n}\n\ninterface BYOBPullIntoDescriptor = NonShared> {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: ArrayBufferViewConstructor;\n readerType: 'byob' | 'none';\n}\n\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableByteStreamController {\n /** @internal */\n _controlledReadableByteStream!: ReadableByteStream;\n /** @internal */\n _queue!: SimpleQueue;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n /** @internal */\n _autoAllocateChunkSize: number | undefined;\n /** @internal */\n _byobRequest: ReadableStreamBYOBRequest | null;\n /** @internal */\n _pendingPullIntos!: SimpleQueue;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest(): ReadableStreamBYOBRequest | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n\n ReadableByteStreamControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk chunk in the controlled readable stream.\n * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown.\n */\n enqueue(chunk: ArrayBufferView): void;\n enqueue(chunk: NonShared): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n\n ReadableByteStreamControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n\n ResetQueue(this);\n\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest>): void {\n const stream = this._controlledReadableByteStream;\n assert(ReadableStreamHasDefaultReader(stream));\n\n if (this._queueTotalSize > 0) {\n assert(ReadableStreamGetNumReadRequests(stream) === 0);\n\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer: ArrayBuffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n } catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n\n const pullIntoDescriptor: DefaultPullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n}\n\nObject.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableByteStreamController.prototype.close, 'close');\nsetFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableByteStreamController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableByteStreamController.\n\nexport function IsReadableByteStreamController(x: any): x is ReadableByteStreamController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n\n return x instanceof ReadableByteStreamController;\n}\n\nfunction IsReadableStreamBYOBRequest(x: any): x is ReadableStreamBYOBRequest {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBRequest;\n}\n\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller: ReadableByteStreamController): void {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller: ReadableByteStreamController) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n}\n\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor>(\n stream: ReadableByteStream,\n pullIntoDescriptor: PullIntoDescriptor\n) {\n assert(stream._state !== 'errored');\n assert(pullIntoDescriptor.readerType !== 'none');\n\n let done = false;\n if (stream._state === 'closed') {\n assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);\n done = true;\n }\n\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView as unknown as NonShared, done);\n } else {\n assert(pullIntoDescriptor.readerType === 'byob');\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n}\n\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor>(\n pullIntoDescriptor: PullIntoDescriptor\n): T {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n\n assert(bytesFilled <= pullIntoDescriptor.byteLength);\n assert(bytesFilled % elementSize === 0);\n\n return new pullIntoDescriptor.viewConstructor(\n pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize) as T;\n}\n\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n}\n\nfunction ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n } catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n}\n\nfunction ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.readerType === 'none');\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n firstDescriptor.buffer,\n firstDescriptor.byteOffset,\n firstDescriptor.bytesFilled\n );\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n}\n\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller: ReadableByteStreamController,\n pullIntoDescriptor: PullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize,\n pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n\n const queue = controller._queue;\n\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n } else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n\n if (!ready) {\n assert(controller._queueTotalSize === 0);\n assert(pullIntoDescriptor.bytesFilled > 0);\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n }\n\n return ready;\n}\n\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller: ReadableByteStreamController,\n size: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);\n assert(controller._byobRequest === null);\n pullIntoDescriptor.bytesFilled += size;\n}\n\nfunction ReadableByteStreamControllerHandleQueueDrain(controller: ReadableByteStreamController) {\n assert(controller._controlledReadableByteStream._state === 'readable');\n\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n } else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n}\n\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller: ReadableByteStreamController) {\n if (controller._byobRequest === null) {\n return;\n }\n\n controller._byobRequest._associatedReadableByteStreamController = undefined!;\n controller._byobRequest._view = null!;\n controller._byobRequest = null;\n}\n\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller: ReadableByteStreamController) {\n assert(!controller._closeRequested);\n\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n assert(pullIntoDescriptor.readerType !== 'none');\n\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n ReadableByteStreamControllerCommitPullIntoDescriptor(\n controller._controlledReadableByteStream,\n pullIntoDescriptor\n );\n }\n }\n}\n\nfunction ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller: ReadableByteStreamController) {\n const reader = controller._controlledReadableByteStream._reader;\n assert(IsReadableStreamDefaultReader(reader));\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n}\n\nexport function ReadableByteStreamControllerPullInto>(\n controller: ReadableByteStreamController,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = controller._controlledReadableByteStream;\n\n const ctor = view.constructor as ArrayBufferViewConstructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n\n const { byteOffset, byteLength } = view;\n\n const minimumFill = min * elementSize;\n assert(minimumFill >= elementSize && minimumFill <= byteLength);\n assert(minimumFill % elementSize === 0);\n\n let buffer: ArrayBuffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n } catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n\n const pullIntoDescriptor: BYOBPullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInClosedState(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.bytesFilled % firstDescriptor.elementSize === 0);\n\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n}\n\nfunction ReadableByteStreamControllerRespondInReadableState(controller: ReadableByteStreamController,\n bytesWritten: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n pullIntoDescriptor.buffer,\n end - remainderSize,\n remainderSize\n );\n }\n\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInternal(controller: ReadableByteStreamController, bytesWritten: number) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n assert(CanTransferArrayBuffer(firstDescriptor.buffer));\n\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n assert(bytesWritten === 0);\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n } else {\n assert(state === 'readable');\n assert(bytesWritten > 0);\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerShiftPendingPullInto(\n controller: ReadableByteStreamController\n): PullIntoDescriptor {\n assert(controller._byobRequest === null);\n const descriptor = controller._pendingPullIntos.shift()!;\n return descriptor;\n}\n\nfunction ReadableByteStreamControllerShouldCallPull(controller: ReadableByteStreamController): boolean {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return false;\n }\n\n if (controller._closeRequested) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableByteStreamControllerClearAlgorithms(controller: ReadableByteStreamController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\n\nexport function ReadableByteStreamControllerClose(controller: ReadableByteStreamController) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n\n return;\n }\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n throw e;\n }\n }\n\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n}\n\nexport function ReadableByteStreamControllerEnqueue(\n controller: ReadableByteStreamController,\n chunk: NonShared\n) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError(\n 'The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk'\n );\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n assert(controller._pendingPullIntos.length === 0);\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n } else {\n assert(controller._queue.length === 0);\n if (controller._pendingPullIntos.length > 0) {\n assert(controller._pendingPullIntos.peek().readerType === 'default');\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView as NonShared, false);\n }\n } else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n } else {\n assert(!IsReadableStreamLocked(stream));\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableByteStreamControllerError(controller: ReadableByteStreamController, e: any) {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableByteStreamControllerFillReadRequestFromQueue(\n controller: ReadableByteStreamController,\n readRequest: ReadRequest>\n) {\n assert(controller._queueTotalSize > 0);\n\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view as NonShared);\n}\n\nexport function ReadableByteStreamControllerGetBYOBRequest(\n controller: ReadableByteStreamController\n): ReadableStreamBYOBRequest | null {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer,\n firstDescriptor.byteOffset + firstDescriptor.bytesFilled,\n firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n\n const byobRequest: ReadableStreamBYOBRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view as NonShared);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n}\n\nfunction ReadableByteStreamControllerGetDesiredSize(controller: ReadableByteStreamController): number | null {\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nexport function ReadableByteStreamControllerRespond(controller: ReadableByteStreamController, bytesWritten: number) {\n assert(controller._pendingPullIntos.length > 0);\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n}\n\nexport function ReadableByteStreamControllerRespondWithNewView(controller: ReadableByteStreamController,\n view: NonShared) {\n assert(controller._pendingPullIntos.length > 0);\n assert(!IsDetachedBuffer(view.buffer));\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (view.byteLength === 0) {\n throw new TypeError(\n 'The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'\n );\n }\n }\n\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n}\n\nexport function SetUpReadableByteStreamController(stream: ReadableByteStream,\n controller: ReadableByteStreamController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n autoAllocateChunkSize: number | undefined) {\n assert(stream._readableStreamController === undefined);\n if (autoAllocateChunkSize !== undefined) {\n assert(NumberIsInteger(autoAllocateChunkSize));\n assert(autoAllocateChunkSize > 0);\n }\n\n controller._controlledReadableByteStream = stream;\n\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._byobRequest = null;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._closeRequested = false;\n controller._started = false;\n\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n\n controller._pendingPullIntos = new SimpleQueue();\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableByteStreamControllerFromUnderlyingSource(\n stream: ReadableByteStream,\n underlyingByteSource: ValidatedUnderlyingByteSource,\n highWaterMark: number\n) {\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n\n SetUpReadableByteStreamController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize\n );\n}\n\nfunction SetUpReadableStreamBYOBRequest(request: ReadableStreamBYOBRequest,\n controller: ReadableByteStreamController,\n view: NonShared) {\n assert(IsReadableByteStreamController(controller));\n assert(typeof view === 'object');\n assert(ArrayBuffer.isView(view));\n assert(!IsDetachedBuffer(view.buffer));\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n}\n\n// Helper functions for the ReadableStreamBYOBRequest.\n\nfunction byobRequestBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n}\n\n// Helper functions for the ReadableByteStreamController.\n\nfunction byteStreamControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n}\n","import { assertDictionary, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from '../readable-stream/reader-options';\n\nexport function convertReaderOptions(options: ReadableStreamGetReaderOptions | null | undefined,\n context: string): ReadableStreamGetReaderOptions {\n assertDictionary(options, context);\n const mode = options?.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n}\n\nfunction convertReadableStreamReaderMode(mode: string, context: string): 'byob' {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n}\n\nexport function convertByobReadOptions(\n options: ReadableStreamBYOBReaderReadOptions | null | undefined,\n context: string\n): ValidatedReadableStreamBYOBReaderReadOptions {\n assertDictionary(options, context);\n const min = options?.min ?? 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(\n min,\n `${context} has member 'min' that`\n )\n };\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, type ReadableByteStream, type ReadableStream } from '../readable-stream';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamController,\n ReadableByteStreamControllerPullInto\n} from './byte-stream-controller';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\nimport { IsDetachedBuffer } from '../abstract-ops/ecmascript';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from './reader-options';\nimport { convertByobReadOptions } from '../validators/reader-options';\nimport { isDataView, type NonShared, type TypedArray } from '../helpers/array-buffer-view';\n\n/**\n * A result returned by {@link ReadableStreamBYOBReader.read}.\n *\n * @public\n */\nexport type ReadableStreamBYOBReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value: T | undefined;\n};\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamBYOBReader(stream: ReadableByteStream): ReadableStreamBYOBReader {\n return new ReadableStreamBYOBReader(stream as ReadableStream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadIntoRequest>(\n stream: ReadableByteStream,\n readIntoRequest: ReadIntoRequest\n): void {\n assert(IsReadableStreamBYOBReader(stream._reader));\n assert(stream._state === 'readable' || stream._state === 'closed');\n\n (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);\n}\n\nexport function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,\n chunk: ArrayBufferView,\n done: boolean) {\n const reader = stream._reader as ReadableStreamBYOBReader;\n\n assert(reader._readIntoRequests.length > 0);\n\n const readIntoRequest = reader._readIntoRequests.shift()!;\n if (done) {\n readIntoRequest._closeSteps(chunk);\n } else {\n readIntoRequest._chunkSteps(chunk);\n }\n}\n\nexport function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {\n return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;\n}\n\nexport function ReadableStreamHasBYOBReader(stream: ReadableByteStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadIntoRequest> {\n _chunkSteps(chunk: T): void;\n\n _closeSteps(chunk: T | undefined): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamBYOBReader {\n /** @internal */\n _ownerReadableStream!: ReadableByteStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readIntoRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readIntoRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Attempts to reads bytes into view, and returns a promise resolved with the result.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(\n view: T,\n options?: ReadableStreamBYOBReaderReadOptions\n ): Promise>;\n read>(\n view: T,\n rawOptions: ReadableStreamBYOBReaderReadOptions | null | undefined = {}\n ): Promise> {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n\n let options: ValidatedReadableStreamBYOBReaderReadOptions;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > (view as unknown as TypedArray).length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n } else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamBYOBReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest: ReadIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamBYOBReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBReader;\n}\n\nexport function ReadableStreamBYOBReaderRead>(\n reader: ReadableStreamBYOBReader,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n } else {\n ReadableByteStreamControllerPullInto(\n stream._readableStreamController as ReadableByteStreamController,\n view,\n min,\n readIntoRequest\n );\n }\n}\n\nexport function ReadableStreamBYOBReaderRelease(reader: ReadableStreamBYOBReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n}\n\nexport function ReadableStreamBYOBReaderErrorReadIntoRequests(reader: ReadableStreamBYOBReader, e: any) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamBYOBReader.\n\nfunction byobReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport NumberIsNaN from '../../stub/number-isnan';\n\nexport function ExtractHighWaterMark(strategy: QueuingStrategy, defaultHWM: number): number {\n const { highWaterMark } = strategy;\n\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n\n return highWaterMark;\n}\n\nexport function ExtractSizeAlgorithm(strategy: QueuingStrategy): QueuingStrategySizeCallback {\n const { size } = strategy;\n\n if (!size) {\n return () => 1;\n }\n\n return size;\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport { assertDictionary, assertFunction, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategy(init: QueuingStrategy | null | undefined,\n context: string): QueuingStrategy {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n const size = init?.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n}\n\nfunction convertQueuingStrategySize(fn: QueuingStrategySizeCallback,\n context: string): QueuingStrategySizeCallback {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from '../writable-stream/underlying-sink';\nimport { WritableStreamDefaultController } from '../writable-stream';\n\nexport function convertUnderlyingSink(original: UnderlyingSink | null,\n context: string): ValidatedUnderlyingSink {\n assertDictionary(original, context);\n const abort = original?.abort;\n const close = original?.close;\n const start = original?.start;\n const type = original?.type;\n const write = original?.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original!, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original!, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original!, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original!, `${context} has member 'write' that`),\n type\n };\n}\n\nfunction convertUnderlyingSinkAbortCallback(\n fn: UnderlyingSinkAbortCallback,\n original: UnderlyingSink,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSinkCloseCallback(\n fn: UnderlyingSinkCloseCallback,\n original: UnderlyingSink,\n context: string\n): () => Promise {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n}\n\nfunction convertUnderlyingSinkStartCallback(\n fn: UnderlyingSinkStartCallback,\n original: UnderlyingSink,\n context: string\n): UnderlyingSinkStartCallback {\n assertFunction(fn, context);\n return (controller: WritableStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSinkWriteCallback(\n fn: UnderlyingSinkWriteCallback,\n original: UnderlyingSink,\n context: string\n): (chunk: W, controller: WritableStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: W, controller: WritableStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n","import { IsWritableStream, WritableStream } from '../writable-stream';\n\nexport function assertWritableStream(x: unknown, context: string): asserts x is WritableStream {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n}\n","/**\n * A signal object that allows you to communicate with a request and abort it if required\n * via its associated `AbortController` object.\n *\n * @remarks\n * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @public\n */\nexport interface AbortSignal {\n /**\n * Whether the request is aborted.\n */\n readonly aborted: boolean;\n\n /**\n * If aborted, returns the reason for aborting.\n */\n readonly reason?: any;\n\n /**\n * Add an event listener to be triggered when this signal becomes aborted.\n */\n addEventListener(type: 'abort', listener: () => void): void;\n\n /**\n * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}.\n */\n removeEventListener(type: 'abort', listener: () => void): void;\n}\n\nexport function isAbortSignal(value: unknown): value is AbortSignal {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof (value as AbortSignal).aborted === 'boolean';\n } catch {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n}\n\n/**\n * A controller object that allows you to abort an `AbortSignal` when desired.\n *\n * @remarks\n * This interface is compatible with the `AbortController` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @internal\n */\nexport interface AbortController {\n readonly signal: AbortSignal;\n\n abort(reason?: any): void;\n}\n\ninterface AbortControllerConstructor {\n new(): AbortController;\n}\n\nconst supportsAbortController = typeof (AbortController as any) === 'function';\n\n/**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\nexport function createAbortController(): AbortController | undefined {\n if (supportsAbortController) {\n return new (AbortController as AbortControllerConstructor)();\n }\n return undefined;\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponPromise\n} from './helpers/webidl';\nimport {\n DequeueValue,\n EnqueueValueWithSize,\n PeekQueueValue,\n type QueuePair,\n ResetQueue\n} from './abstract-ops/queue-with-sizes';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { SimpleQueue } from './simple-queue';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { AbortSteps, ErrorSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from './writable-stream/underlying-sink';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertUnderlyingSink } from './validators/underlying-sink';\nimport { assertWritableStream } from './validators/writable-stream';\nimport { type AbortController, type AbortSignal, createAbortController } from './abort-signal';\n\ntype WritableStreamState = 'writable' | 'closed' | 'erroring' | 'errored';\n\ninterface WriteOrCloseRequest {\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n}\n\ntype WriteRequest = WriteOrCloseRequest;\ntype CloseRequest = WriteOrCloseRequest;\n\ninterface PendingAbortRequest {\n _promise: Promise;\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n _reason: any;\n _wasAlreadyErroring: boolean;\n}\n\n/**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\nclass WritableStream {\n /** @internal */\n _state!: WritableStreamState;\n /** @internal */\n _storedError: any;\n /** @internal */\n _writer: WritableStreamDefaultWriter | undefined;\n /** @internal */\n _writableStreamController!: WritableStreamDefaultController;\n /** @internal */\n _writeRequests!: SimpleQueue;\n /** @internal */\n _inFlightWriteRequest: WriteRequest | undefined;\n /** @internal */\n _closeRequest: CloseRequest | undefined;\n /** @internal */\n _inFlightCloseRequest: CloseRequest | undefined;\n /** @internal */\n _pendingAbortRequest: PendingAbortRequest | undefined;\n /** @internal */\n _backpressure!: boolean;\n\n constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSink: UnderlyingSink | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n } else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n\n InitializeWritableStream(this);\n\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked(): boolean {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsWritableStreamLocked(this);\n }\n\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('abort'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n\n return WritableStreamAbort(this, reason);\n }\n\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('close'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamClose(this);\n }\n\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter(): WritableStreamDefaultWriter {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('getWriter');\n }\n\n return AcquireWritableStreamDefaultWriter(this);\n }\n}\n\nObject.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(WritableStream.prototype.abort, 'abort');\nsetFunctionName(WritableStream.prototype.close, 'close');\nsetFunctionName(WritableStream.prototype.getWriter, 'getWriter');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n}\n\nexport {\n AcquireWritableStreamDefaultWriter,\n CreateWritableStream,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamDefaultControllerErrorIfNeeded,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite,\n WritableStreamCloseQueuedOrInFlight\n};\n\nexport type {\n UnderlyingSink,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkAbortCallback\n};\n\n// Abstract operations for the WritableStream.\n\nfunction AcquireWritableStreamDefaultWriter(stream: WritableStream): WritableStreamDefaultWriter {\n return new WritableStreamDefaultWriter(stream);\n}\n\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: WritableStream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n\n const controller: WritableStreamDefaultController = Object.create(WritableStreamDefaultController.prototype);\n\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm,\n abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n}\n\nfunction InitializeWritableStream(stream: WritableStream) {\n stream._state = 'writable';\n\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n\n stream._writer = undefined;\n\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined!;\n\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n}\n\nfunction IsWritableStream(x: unknown): x is WritableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n\n return x instanceof WritableStream;\n}\n\nfunction IsWritableStreamLocked(stream: WritableStream): boolean {\n assert(IsWritableStream(stream));\n\n if (stream._writer === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamAbort(stream: WritableStream, reason: any): Promise {\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n stream._writableStreamController._abortController?.abort(reason);\n\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state as WritableStreamState;\n\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined!,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest!._promise = promise;\n\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n\n return promise;\n}\n\nfunction WritableStreamClose(stream: WritableStream): Promise {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(\n `The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n\n assert(state === 'writable' || state === 'erroring');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const promise = newPromise((resolve, reject) => {\n const closeRequest: CloseRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._closeRequest = closeRequest;\n });\n\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n\n return promise;\n}\n\n// WritableStream API exposed for controllers.\n\nfunction WritableStreamAddWriteRequest(stream: WritableStream): Promise {\n assert(IsWritableStreamLocked(stream));\n assert(stream._state === 'writable');\n\n const promise = newPromise((resolve, reject) => {\n const writeRequest: WriteRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._writeRequests.push(writeRequest);\n });\n\n return promise;\n}\n\nfunction WritableStreamDealWithRejection(stream: WritableStream, error: any) {\n const state = stream._state;\n\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n\n assert(state === 'erroring');\n WritableStreamFinishErroring(stream);\n}\n\nfunction WritableStreamStartErroring(stream: WritableStream, reason: any) {\n assert(stream._storedError === undefined);\n assert(stream._state === 'writable');\n\n const controller = stream._writableStreamController;\n assert(controller !== undefined);\n\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n}\n\nfunction WritableStreamFinishErroring(stream: WritableStream) {\n assert(stream._state === 'erroring');\n assert(!WritableStreamHasOperationMarkedInFlight(stream));\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(\n promise,\n () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n },\n (reason: any) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n}\n\nfunction WritableStreamFinishInFlightWrite(stream: WritableStream) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n}\n\nfunction WritableStreamFinishInFlightWriteWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._reject(error);\n stream._inFlightWriteRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n WritableStreamDealWithRejection(stream, error);\n}\n\nfunction WritableStreamFinishInFlightClose(stream: WritableStream) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n\n const state = stream._state;\n\n assert(state === 'writable' || state === 'erroring');\n\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n\n stream._state = 'closed';\n\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n\n assert(stream._pendingAbortRequest === undefined);\n assert(stream._storedError === undefined);\n}\n\nfunction WritableStreamFinishInFlightCloseWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._reject(error);\n stream._inFlightCloseRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n}\n\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream: WritableStream): boolean {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamHasOperationMarkedInFlight(stream: WritableStream): boolean {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamMarkCloseRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightCloseRequest === undefined);\n assert(stream._closeRequest !== undefined);\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n}\n\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightWriteRequest === undefined);\n assert(stream._writeRequests.length !== 0);\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\n\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream: WritableStream) {\n assert(stream._state === 'errored');\n if (stream._closeRequest !== undefined) {\n assert(stream._inFlightCloseRequest === undefined);\n\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n}\n\nfunction WritableStreamUpdateBackpressure(stream: WritableStream, backpressure: boolean) {\n assert(stream._state === 'writable');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n } else {\n assert(!backpressure);\n\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n\n stream._backpressure = backpressure;\n}\n\n/**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\nexport class WritableStreamDefaultWriter {\n /** @internal */\n _ownerWritableStream: WritableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _closedPromiseState!: 'pending' | 'resolved' | 'rejected';\n /** @internal */\n _readyPromise!: Promise;\n /** @internal */\n _readyPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _readyPromise_reject?: (reason: any) => void;\n /** @internal */\n _readyPromiseState!: 'pending' | 'fulfilled' | 'rejected';\n\n constructor(stream: WritableStream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n\n this._ownerWritableStream = stream;\n stream._writer = this;\n\n const state = stream._state;\n\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n } else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n } else {\n assert(state === 'errored');\n\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize(): number | null {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n\n return this._readyPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamDefaultWriterClose(this);\n }\n\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock(): void {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return;\n }\n\n assert(stream._writer !== undefined);\n\n WritableStreamDefaultWriterRelease(this);\n }\n\n /**\n * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully,\n * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return\n * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes\n * errored before the writing process is initiated.\n *\n * Note that what \"success\" means is up to the underlying sink; it might indicate simply that the chunk has been\n * accepted, and not necessarily that it is safely saved to its ultimate destination.\n */\n write(chunk: W): Promise;\n write(chunk: W = undefined!): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n});\nsetFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\nsetFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\nsetFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\nsetFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n}\n\n// Abstract operations for the WritableStreamDefaultWriter.\n\nfunction IsWritableStreamDefaultWriter(x: any): x is WritableStreamDefaultWriter {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultWriter;\n}\n\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultWriterAbort(writer: WritableStreamDefaultWriter, reason: any) {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamAbort(stream, reason);\n}\n\nfunction WritableStreamDefaultWriterClose(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamClose(stream);\n}\n\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n return WritableStreamDefaultWriterClose(writer);\n}\n\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n } else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n } else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterGetDesiredSize(writer: WritableStreamDefaultWriter): number | null {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n\n if (state === 'closed') {\n return 0;\n }\n\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\n\nfunction WritableStreamDefaultWriterRelease(writer: WritableStreamDefaultWriter) {\n const stream = writer._ownerWritableStream;\n assert(stream !== undefined);\n assert(stream._writer === writer);\n\n const releasedError = new TypeError(\n `Writer was released and can no longer be used to monitor the stream's closedness`);\n\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n\n stream._writer = undefined;\n writer._ownerWritableStream = undefined!;\n}\n\nfunction WritableStreamDefaultWriterWrite(writer: WritableStreamDefaultWriter, chunk: W): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const controller = stream._writableStreamController;\n\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable');\n\n const promise = WritableStreamAddWriteRequest(stream);\n\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n\n return promise;\n}\n\nconst closeSentinel: unique symbol = {} as any;\n\ntype QueueRecord = W | typeof closeSentinel;\n\n/**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\nexport class WritableStreamDefaultController {\n /** @internal */\n _controlledWritableStream!: WritableStream;\n /** @internal */\n _queue!: SimpleQueue>>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _abortReason: any;\n /** @internal */\n _abortController: AbortController | undefined;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _writeAlgorithm!: (chunk: W) => Promise;\n /** @internal */\n _closeAlgorithm!: () => Promise;\n /** @internal */\n _abortAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason(): any {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('abortReason');\n }\n return this._abortReason;\n }\n\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal(): AbortSignal {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e: any = undefined): void {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n\n WritableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [AbortSteps](reason: any): Promise {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations implementing interface required by the WritableStream.\n\nfunction IsWritableStreamDefaultController(x: any): x is WritableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultController;\n}\n\nfunction SetUpWritableStreamDefaultController(stream: WritableStream,\n controller: WritableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(IsWritableStream(stream));\n assert(stream._writableStreamController === undefined);\n\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(\n startPromise,\n () => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n r => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n }\n );\n}\n\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream: WritableStream,\n underlyingSink: ValidatedUnderlyingSink,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let writeAlgorithm: (chunk: W) => Promise;\n let closeAlgorithm: () => Promise;\n let abortAlgorithm: (reason: any) => Promise;\n\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write!(chunk, controller);\n } else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close!();\n } else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort!(reason);\n } else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpWritableStreamDefaultController(\n stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\nfunction WritableStreamDefaultControllerClearAlgorithms(controller: WritableStreamDefaultController) {\n controller._writeAlgorithm = undefined!;\n controller._closeAlgorithm = undefined!;\n controller._abortAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\nfunction WritableStreamDefaultControllerClose(controller: WritableStreamDefaultController) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\nfunction WritableStreamDefaultControllerGetChunkSize(controller: WritableStreamDefaultController,\n chunk: W): number {\n try {\n return controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n}\n\nfunction WritableStreamDefaultControllerGetDesiredSize(controller: WritableStreamDefaultController): number {\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nfunction WritableStreamDefaultControllerWrite(controller: WritableStreamDefaultController,\n chunk: W,\n chunkSize: number) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\n// Abstract operations for the WritableStreamDefaultController.\n\nfunction WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n if (!controller._started) {\n return;\n }\n\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n\n const state = stream._state;\n assert(state !== 'closed' && state !== 'errored');\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n\n if (controller._queue.length === 0) {\n return;\n }\n\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n } else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n}\n\nfunction WritableStreamDefaultControllerErrorIfNeeded(controller: WritableStreamDefaultController, error: any) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n}\n\nfunction WritableStreamDefaultControllerProcessClose(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkCloseRequestInFlight(stream);\n\n DequeueValue(controller);\n assert(controller._queue.length === 0);\n\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(\n sinkClosePromise,\n () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n },\n reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerProcessWrite(controller: WritableStreamDefaultController, chunk: W) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(\n sinkWritePromise,\n () => {\n WritableStreamFinishInFlightWrite(stream);\n\n const state = stream._state;\n assert(state === 'writable' || state === 'erroring');\n\n DequeueValue(controller);\n\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerGetBackpressure(controller: WritableStreamDefaultController): boolean {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n}\n\n// A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultControllerError(controller: WritableStreamDefaultController, error: any) {\n const stream = controller._controlledWritableStream;\n\n assert(stream._state === 'writable');\n\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n}\n\n// Helper functions for the WritableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n}\n\n// Helper functions for the WritableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n}\n\n\n// Helper functions for the WritableStreamDefaultWriter.\n\nfunction defaultWriterBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n}\n\nfunction defaultWriterLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n}\n\nfunction defaultWriterClosedPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n}\n\nfunction defaultWriterClosedPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n}\n\nfunction defaultWriterClosedPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n}\n\nfunction defaultWriterClosedPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._closedPromise_resolve === undefined);\n assert(writer._closedPromise_reject === undefined);\n assert(writer._closedPromiseState !== 'pending');\n\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n}\n\nfunction defaultWriterReadyPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n}\n\nfunction defaultWriterReadyPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n}\n\nfunction defaultWriterReadyPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n}\n\nfunction defaultWriterReadyPromiseReset(writer: WritableStreamDefaultWriter) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitialize(writer);\n}\n\nfunction defaultWriterReadyPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n}\n","/// \n\nfunction getGlobals(): typeof globalThis | undefined {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n } else if (typeof self !== 'undefined') {\n return self;\n } else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n}\n\nexport const globals = getGlobals();\n","/// \nimport { globals } from '../globals';\nimport { setFunctionName } from '../lib/helpers/miscellaneous';\n\ninterface DOMException extends Error {\n name: string;\n message: string;\n}\n\ntype DOMExceptionConstructor = new (message?: string, name?: string) => DOMException;\n\nfunction isDOMExceptionConstructor(ctor: unknown): ctor is DOMExceptionConstructor {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if ((ctor as DOMExceptionConstructor).name !== 'DOMException') {\n return false;\n }\n try {\n new (ctor as DOMExceptionConstructor)();\n return true;\n } catch {\n return false;\n }\n}\n\n/**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\nfunction getFromGlobal(): DOMExceptionConstructor | undefined {\n const ctor = globals?.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n}\n\n/**\n * Support:\n * - All platforms\n */\nfunction createPolyfill(): DOMExceptionConstructor {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(this: DOMException, message?: string, name?: string) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n } as any;\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-redeclare\nconst DOMException: DOMExceptionConstructor = getFromGlobal() || createPolyfill();\n\nexport { DOMException };\n","import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';\nimport { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireWritableStreamDefaultWriter,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamCloseQueuedOrInFlight,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite\n} from '../writable-stream';\nimport assert from '../../stub/assert';\nimport {\n newPromise,\n PerformPromiseThen,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponFulfillment,\n uponPromise,\n uponRejection\n} from '../helpers/webidl';\nimport { noop } from '../../utils';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\nimport { DOMException } from '../../stub/dom-exception';\n\nexport function ReadableStreamPipeTo(source: ReadableStream,\n dest: WritableStream,\n preventClose: boolean,\n preventAbort: boolean,\n preventCancel: boolean,\n signal: AbortSignal | undefined): Promise {\n assert(IsReadableStream(source));\n assert(IsWritableStream(dest));\n assert(typeof preventClose === 'boolean');\n assert(typeof preventAbort === 'boolean');\n assert(typeof preventCancel === 'boolean');\n assert(signal === undefined || isAbortSignal(signal));\n assert(!IsReadableStreamLocked(source));\n assert(!IsWritableStreamLocked(dest));\n\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n\n source._disturbed = true;\n\n let shuttingDown = false;\n\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n\n return newPromise((resolve, reject) => {\n let abortAlgorithm: () => void;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions: Array<() => Promise> = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n\n signal.addEventListener('abort', abortAlgorithm);\n }\n\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done: boolean) {\n if (done) {\n resolveLoop();\n } else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n\n next(false);\n });\n }\n\n function pipeStep(): Promise {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(\n reader,\n {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n }\n );\n });\n });\n }\n\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n } else {\n shutdown();\n }\n return null;\n });\n\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n } else {\n shutdown(true, destClosed);\n }\n }\n\n setPromiseIsHandledToTrue(pipeLoop());\n\n function waitForWritesToFinish(): Promise {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(\n currentWrite,\n () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined\n );\n }\n\n function isOrBecomesErrored(stream: ReadableStream | WritableStream,\n promise: Promise,\n action: (reason: any) => null) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n } else {\n uponRejection(promise, action);\n }\n }\n\n function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise, action: () => null) {\n if (stream._state === 'closed') {\n action();\n } else {\n uponFulfillment(promise, action);\n }\n }\n\n function shutdownWithAction(action: () => Promise, originalIsError?: boolean, originalError?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n } else {\n doTheRest();\n }\n\n function doTheRest(): null {\n uponPromise(\n action(),\n () => finalize(originalIsError, originalError),\n newError => finalize(true, newError)\n );\n return null;\n }\n }\n\n function shutdown(isError?: boolean, error?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n } else {\n finalize(isError, error);\n }\n }\n\n function finalize(isError?: boolean, error?: any): null {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n } else {\n resolve(undefined);\n }\n\n return null;\n }\n });\n}\n","import type { QueuingStrategySizeCallback } from '../queuing-strategy';\nimport assert from '../../stub/assert';\nimport { DequeueValue, EnqueueValueWithSize, type QueuePair, ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n type ReadRequest\n} from './default-reader';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsReadableStreamLocked, ReadableStream, ReadableStreamClose, ReadableStreamError } from '../readable-stream';\nimport type { ValidatedUnderlyingSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\n\n/**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableStreamDefaultController {\n /** @internal */\n _controlledReadableStream!: ReadableStream;\n /** @internal */\n _queue!: SimpleQueue>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('close');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n\n ReadableStreamDefaultControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the controlled readable stream.\n */\n enqueue(chunk: R): void;\n enqueue(chunk: R = undefined!): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n ReadableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest): void {\n const stream = this._controlledReadableStream;\n\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n } else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n\n readRequest._chunkSteps(chunk);\n } else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n // Do nothing.\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\nsetFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableStreamDefaultController.\n\nfunction IsReadableStreamDefaultController(x: any): x is ReadableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultController;\n}\n\nfunction ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController): void {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController): boolean {\n const stream = controller._controlledReadableStream;\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\n// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n\nexport function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n controller._closeRequested = true;\n\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n}\n\nexport function ReadableStreamDefaultControllerEnqueue(\n controller: ReadableStreamDefaultController,\n chunk: R\n): void {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n } else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController, e: any) {\n const stream = controller._controlledReadableStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ResetQueue(controller);\n\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableStreamDefaultControllerGetDesiredSize(\n controller: ReadableStreamDefaultController\n): number | null {\n const state = controller._controlledReadableStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\n// This is used in the implementation of TransformStream.\nexport function ReadableStreamDefaultControllerHasBackpressure(\n controller: ReadableStreamDefaultController\n): boolean {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n\n return true;\n}\n\nexport function ReadableStreamDefaultControllerCanCloseOrEnqueue(\n controller: ReadableStreamDefaultController\n): boolean {\n const state = controller._controlledReadableStream._state;\n\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n\n return false;\n}\n\nexport function SetUpReadableStreamDefaultController(stream: ReadableStream,\n controller: ReadableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(stream._readableStreamController === undefined);\n\n controller._controlledReadableStream = stream;\n\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n stream: ReadableStream,\n underlyingSource: ValidatedUnderlyingSource,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback\n) {\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// Helper functions for the ReadableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n}\n","import {\n CreateReadableByteStream,\n CreateReadableStream,\n type DefaultReadableStream,\n IsReadableStream,\n type ReadableByteStream,\n ReadableStream,\n ReadableStreamCancel,\n type ReadableStreamReader\n} from '../readable-stream';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadRequest\n} from './default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReaderRead,\n type ReadIntoRequest\n} from './byob-reader';\nimport assert from '../../stub/assert';\nimport { newPromise, promiseResolvedWith, queueMicrotask, uponRejection } from '../helpers/webidl';\nimport {\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError\n} from './default-controller';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamControllerClose,\n ReadableByteStreamControllerEnqueue,\n ReadableByteStreamControllerError,\n ReadableByteStreamControllerGetBYOBRequest,\n ReadableByteStreamControllerRespond,\n ReadableByteStreamControllerRespondWithNewView\n} from './byte-stream-controller';\nimport { CreateArrayFromList } from '../abstract-ops/ecmascript';\nimport { CloneAsUint8Array } from '../abstract-ops/miscellaneous';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function ReadableStreamTee(stream: ReadableStream,\n cloneForBranch2: boolean): [ReadableStream, ReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream as unknown as ReadableByteStream) as\n unknown as [ReadableStream, ReadableStream];\n }\n return ReadableStreamDefaultTee(stream, cloneForBranch2);\n}\n\nexport function ReadableStreamDefaultTee(\n stream: ReadableStream,\n cloneForBranch2: boolean\n): [DefaultReadableStream, DefaultReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n\n const reader = AcquireReadableStreamDefaultReader(stream);\n\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: DefaultReadableStream;\n let branch2: DefaultReadableStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function pullAlgorithm(): Promise {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm() {\n // do nothing\n }\n\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n\n uponRejection(reader._closedPromise, (r: any) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n\n return [branch1, branch2];\n}\n\nexport function ReadableByteStreamTee(stream: ReadableByteStream): [ReadableByteStream, ReadableByteStream] {\n assert(IsReadableStream(stream));\n assert(IsReadableByteStreamController(stream._readableStreamController));\n\n let reader: ReadableStreamReader> = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: ReadableByteStream;\n let branch2: ReadableByteStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function forwardReaderError(thisReader: ReadableStreamReader>) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n assert(reader._readIntoRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n\n const readRequest: ReadRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n\n function pullWithBYOBReader(view: NonShared, forBranch2: boolean) {\n if (IsReadableStreamDefaultReader>(reader)) {\n assert(reader._readRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n\n const readIntoRequest: ReadIntoRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n } else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n\n if (chunk !== undefined) {\n assert(chunk.byteLength === 0);\n\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n\n function pull1Algorithm(): Promise {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, false);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function pull2Algorithm(): Promise {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, true);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm(): void {\n return;\n }\n\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n\n forwardReaderError(reader);\n\n return [branch1, branch2];\n}\n","import { typeIsObject } from '../helpers/miscellaneous';\nimport type { ReadableStreamDefaultReadResult } from './default-reader';\n\n/**\n * A common interface for a `ReadadableStream` implementation.\n *\n * @public\n */\nexport interface ReadableStreamLike {\n readonly locked: boolean;\n\n getReader(): ReadableStreamDefaultReaderLike;\n}\n\n/**\n * A common interface for a `ReadableStreamDefaultReader` implementation.\n *\n * @public\n */\nexport interface ReadableStreamDefaultReaderLike {\n readonly closed: Promise;\n\n cancel(reason?: any): Promise;\n\n read(): Promise>;\n\n releaseLock(): void;\n}\n\nexport function isReadableStreamLike(stream: unknown): stream is ReadableStreamLike {\n return typeIsObject(stream) && typeof (stream as ReadableStreamLike).getReader !== 'undefined';\n}\n","import { CreateReadableStream, type DefaultReadableStream } from '../readable-stream';\nimport {\n isReadableStreamLike,\n type ReadableStreamDefaultReaderLike,\n type ReadableStreamLike\n} from './readable-stream-like';\nimport { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue } from './default-controller';\nimport { GetIterator, GetMethod, IteratorComplete, IteratorNext, IteratorValue } from '../abstract-ops/ecmascript';\nimport { promiseRejectedWith, promiseResolvedWith, reflectCall, transformPromiseWith } from '../helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport { noop } from '../../utils';\n\nexport function ReadableStreamFrom(\n source: Iterable | AsyncIterable | ReadableStreamLike\n): DefaultReadableStream {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n}\n\nexport function ReadableStreamFromIterable(asyncIterable: Iterable | AsyncIterable): DefaultReadableStream {\n let stream: DefaultReadableStream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n const iterator = iteratorRecord.iterator;\n let returnMethod: (typeof iterator)['return'] | undefined;\n try {\n returnMethod = GetMethod(iterator, 'return');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult: IteratorResult | Promise>;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n\nexport function ReadableStreamFromDefaultReader(\n reader: ReadableStreamDefaultReaderLike\n): DefaultReadableStream {\n let stream: DefaultReadableStream;\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let readPromise;\n try {\n readPromise = reader.read();\n } catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n } catch (e) {\n return promiseRejectedWith(e);\n }\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n","import { assertDictionary, assertFunction, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamController,\n UnderlyingByteSource,\n UnderlyingDefaultOrByteSource,\n UnderlyingDefaultOrByteSourcePullCallback,\n UnderlyingDefaultOrByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n ValidatedUnderlyingDefaultOrByteSource\n} from '../readable-stream/underlying-source';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\n\nexport function convertUnderlyingDefaultOrByteSource(\n source: UnderlyingSource | UnderlyingByteSource | null,\n context: string\n): ValidatedUnderlyingDefaultOrByteSource {\n assertDictionary(source, context);\n const original = source as (UnderlyingDefaultOrByteSource | null);\n const autoAllocateChunkSize = original?.autoAllocateChunkSize;\n const cancel = original?.cancel;\n const pull = original?.pull;\n const start = original?.start;\n const type = original?.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(\n autoAllocateChunkSize,\n `${context} has member 'autoAllocateChunkSize' that`\n ),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original!, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original!, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n}\n\nfunction convertUnderlyingSourceCancelCallback(\n fn: UnderlyingSourceCancelCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSourcePullCallback(\n fn: UnderlyingDefaultOrByteSourcePullCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (controller: ReadableStreamController) => Promise {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSourceStartCallback(\n fn: UnderlyingDefaultOrByteSourceStartCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): UnderlyingDefaultOrByteSourceStartCallback {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertReadableStreamType(type: string, context: string): 'bytes' {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n}\n","import { assertDictionary } from './basic';\nimport type {\n ReadableStreamIteratorOptions,\n ValidatedReadableStreamIteratorOptions\n} from '../readable-stream/iterator-options';\n\nexport function convertIteratorOptions(options: ReadableStreamIteratorOptions | null | undefined,\n context: string): ValidatedReadableStreamIteratorOptions {\n assertDictionary(options, context);\n const preventCancel = options?.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n}\n","import { assertDictionary } from './basic';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from '../readable-stream/pipe-options';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\n\nexport function convertPipeOptions(options: StreamPipeOptions | null | undefined,\n context: string): ValidatedStreamPipeOptions {\n assertDictionary(options, context);\n const preventAbort = options?.preventAbort;\n const preventCancel = options?.preventCancel;\n const preventClose = options?.preventClose;\n const signal = options?.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n}\n\nfunction assertAbortSignal(signal: unknown, context: string): asserts signal is AbortSignal {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n}\n","import { assertDictionary, assertRequiredField } from './basic';\nimport { ReadableStream } from '../readable-stream';\nimport { WritableStream } from '../writable-stream';\nimport { assertReadableStream } from './readable-stream';\nimport { assertWritableStream } from './writable-stream';\n\nexport function convertReadableWritablePair(\n pair: { readable: RS; writable: WS } | null | undefined,\n context: string\n): { readable: RS; writable: WS } {\n assertDictionary(pair, context);\n\n const readable = pair?.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n\n const writable = pair?.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n\n return { readable, writable };\n}\n","import assert from '../stub/assert';\nimport {\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith\n} from './helpers/webidl';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { AcquireReadableStreamAsyncIterator, type ReadableStreamAsyncIterator } from './readable-stream/async-iterator';\nimport { defaultReaderClosedPromiseReject, defaultReaderClosedPromiseResolve } from './readable-stream/generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderErrorReadRequests,\n type ReadableStreamDefaultReadResult\n} from './readable-stream/default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBReaderErrorReadIntoRequests,\n type ReadableStreamBYOBReadResult\n} from './readable-stream/byob-reader';\nimport { ReadableStreamPipeTo } from './readable-stream/pipe';\nimport { ReadableStreamTee } from './readable-stream/tee';\nimport { ReadableStreamFrom } from './readable-stream/from';\nimport { IsWritableStream, IsWritableStreamLocked, WritableStream } from './writable-stream';\nimport { SimpleQueue } from './simple-queue';\nimport {\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n SetUpReadableByteStreamController,\n SetUpReadableByteStreamControllerFromUnderlyingSource\n} from './readable-stream/byte-stream-controller';\nimport {\n ReadableStreamDefaultController,\n SetUpReadableStreamDefaultController,\n SetUpReadableStreamDefaultControllerFromUnderlyingSource\n} from './readable-stream/default-controller';\nimport type {\n UnderlyingByteSource,\n UnderlyingByteSourcePullCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceStartCallback\n} from './readable-stream/underlying-source';\nimport { noop } from '../utils';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { CreateArrayFromList, SymbolAsyncIterator } from './abstract-ops/ecmascript';\nimport { CancelSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertUnderlyingDefaultOrByteSource } from './validators/underlying-source';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions\n} from './readable-stream/reader-options';\nimport { convertReaderOptions } from './validators/reader-options';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from './readable-stream/pipe-options';\nimport type { ReadableStreamIteratorOptions } from './readable-stream/iterator-options';\nimport { convertIteratorOptions } from './validators/iterator-options';\nimport { convertPipeOptions } from './validators/pipe-options';\nimport type { ReadableWritablePair } from './readable-stream/readable-writable-pair';\nimport { convertReadableWritablePair } from './validators/readable-writable-pair';\nimport type { ReadableStreamDefaultReaderLike, ReadableStreamLike } from './readable-stream/readable-stream-like';\nimport type { NonShared } from './helpers/array-buffer-view';\n\nexport type DefaultReadableStream = ReadableStream & {\n _readableStreamController: ReadableStreamDefaultController\n};\n\nexport type ReadableByteStream = ReadableStream> & {\n _readableStreamController: ReadableByteStreamController\n};\n\ntype ReadableStreamState = 'readable' | 'closed' | 'errored';\n\n/**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\nexport class ReadableStream implements AsyncIterable {\n /** @internal */\n _state!: ReadableStreamState;\n /** @internal */\n _reader: ReadableStreamReader | undefined;\n /** @internal */\n _storedError: any;\n /** @internal */\n _disturbed!: boolean;\n /** @internal */\n _readableStreamController!: ReadableStreamDefaultController | ReadableByteStreamController;\n\n constructor(underlyingSource: UnderlyingByteSource, strategy?: { highWaterMark?: number; size?: undefined });\n constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSource: UnderlyingSource | UnderlyingByteSource | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n } else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n\n InitializeReadableStream(this);\n\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(\n this as unknown as ReadableByteStream,\n underlyingSource,\n highWaterMark\n );\n } else {\n assert(underlyingSource.type === undefined);\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n this,\n underlyingSource,\n highWaterMark,\n sizeAlgorithm\n );\n }\n }\n\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked(): boolean {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsReadableStreamLocked(this);\n }\n\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('cancel'));\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n\n return ReadableStreamCancel(this, reason);\n }\n\n /**\n * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader.\n *\n * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams,\n * i.e. streams which were constructed specifically with the ability to handle \"bring your own buffer\" reading.\n * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its\n * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise\n * control over allocation.\n */\n getReader({ mode }: { mode: 'byob' }): ReadableStreamBYOBReader;\n /**\n * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader.\n * While the stream is locked, no other reader can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to consume a stream\n * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours\n * or cancel the stream, which would interfere with your abstraction.\n */\n getReader(): ReadableStreamDefaultReader;\n getReader(\n rawOptions: ReadableStreamGetReaderOptions | null | undefined = undefined\n ): ReadableStreamDefaultReader | ReadableStreamBYOBReader {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('getReader');\n }\n\n const options = convertReaderOptions(rawOptions, 'First parameter');\n\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n\n assert(options.mode === 'byob');\n return AcquireReadableStreamBYOBReader(this as unknown as ReadableByteStream);\n }\n\n /**\n * Provides a convenient, chainable way of piping this readable stream through a transform stream\n * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream\n * into the writable side of the supplied pair, and returns the readable side for further use.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeThrough(\n transform: { readable: RS; writable: WritableStream },\n options?: StreamPipeOptions\n ): RS;\n pipeThrough(\n rawTransform: { readable: RS; writable: WritableStream } | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}\n ): RS {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n\n const promise = ReadableStreamPipeTo(\n this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n\n setPromiseIsHandledToTrue(promise);\n\n return transform.readable;\n }\n\n /**\n * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under\n * various error conditions can be customized with a number of passed options. It returns a promise that fulfills\n * when the piping process completes successfully, or rejects if any errors were encountered.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise;\n pipeTo(destination: WritableStream | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('pipeTo'));\n }\n\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(\n new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)\n );\n }\n\n let options: ValidatedStreamPipeOptions;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')\n );\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')\n );\n }\n\n return ReadableStreamPipeTo(\n this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n }\n\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee(): [ReadableStream, ReadableStream] {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('tee');\n }\n\n const branches = ReadableStreamTee(this, false);\n return CreateArrayFromList(branches);\n }\n\n /**\n * Asynchronously iterates over the chunks in the stream's internal queue.\n *\n * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader.\n * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method\n * is called, e.g. by breaking out of the loop.\n *\n * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also\n * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing\n * `true` for the `preventCancel` option.\n */\n values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n values(rawOptions: ReadableStreamIteratorOptions | null | undefined = undefined): ReadableStreamAsyncIterator {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('values');\n }\n\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n\n /**\n * {@inheritDoc ReadableStream.values}\n */\n [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n\n [SymbolAsyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator {\n // Stub implementation, overridden below\n return this.values(options);\n }\n\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream {\n return ReadableStreamFrom(asyncIterable);\n }\n}\n\nObject.defineProperties(ReadableStream, {\n from: { enumerable: true }\n});\nObject.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(ReadableStream.from, 'from');\nsetFunctionName(ReadableStream.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStream.prototype.getReader, 'getReader');\nsetFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\nsetFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\nsetFunctionName(ReadableStream.prototype.tee, 'tee');\nsetFunctionName(ReadableStream.prototype.values, 'values');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n}\nObject.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n});\n\nexport type {\n ReadableStreamAsyncIterator,\n ReadableStreamDefaultReadResult,\n ReadableStreamBYOBReadResult,\n ReadableStreamBYOBReaderReadOptions,\n UnderlyingByteSource,\n UnderlyingSource,\n UnderlyingSourceStartCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceCancelCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingByteSourcePullCallback,\n StreamPipeOptions,\n ReadableWritablePair,\n ReadableStreamIteratorOptions,\n ReadableStreamLike,\n ReadableStreamDefaultReaderLike\n};\n\n// Abstract operations for the ReadableStream.\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1\n): DefaultReadableStream {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: DefaultReadableStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n\n return stream;\n}\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableByteStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise\n): ReadableByteStream {\n const stream: ReadableByteStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n\n return stream;\n}\n\nfunction InitializeReadableStream(stream: ReadableStream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n}\n\nexport function IsReadableStream(x: unknown): x is ReadableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStream;\n}\n\nexport function IsReadableStreamDisturbed(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n return stream._disturbed;\n}\n\nexport function IsReadableStreamLocked(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n if (stream._reader === undefined) {\n return false;\n }\n\n return true;\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamCancel(stream: ReadableStream, reason: any): Promise {\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n ReadableStreamClose(stream);\n\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n}\n\nexport function ReadableStreamClose(stream: ReadableStream): void {\n assert(stream._state === 'readable');\n\n stream._state = 'closed';\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseResolve(reader);\n\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n}\n\nexport function ReadableStreamError(stream: ReadableStream, e: any): void {\n assert(IsReadableStream(stream));\n assert(stream._state === 'readable');\n\n stream._state = 'errored';\n stream._storedError = e;\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseReject(reader, e);\n\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n } else {\n assert(IsReadableStreamBYOBReader(reader));\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n}\n\n// Readers\n\nexport type ReadableStreamReader = ReadableStreamDefaultReader | ReadableStreamBYOBReader;\n\nexport {\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader\n};\n\n// Controllers\n\nexport {\n ReadableStreamDefaultController,\n ReadableStreamBYOBRequest,\n ReadableByteStreamController\n};\n\n// Helper functions for the ReadableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n}\n","import type { QueuingStrategyInit } from '../queuing-strategy';\nimport { assertDictionary, assertRequiredField, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategyInit(init: QueuingStrategyInit | null | undefined,\n context: string): QueuingStrategyInit {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst byteLengthSizeFunction = (chunk: ArrayBufferView): number => {\n return chunk.byteLength;\n};\nsetFunctionName(byteLengthSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\nexport default class ByteLengthQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _byteLengthQueuingStrategyHighWaterMark: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size(): (chunk: ArrayBufferView) => number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n}\n\nObject.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the ByteLengthQueuingStrategy.\n\nfunction byteLengthBrandCheckException(name: string): TypeError {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n}\n\nexport function IsByteLengthQueuingStrategy(x: any): x is ByteLengthQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof ByteLengthQueuingStrategy;\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst countSizeFunction = (): 1 => {\n return 1;\n};\nsetFunctionName(countSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\nexport default class CountQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _countQueuingStrategyHighWaterMark!: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size(): (chunk: any) => 1 {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n}\n\nObject.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the CountQueuingStrategy.\n\nfunction countBrandCheckException(name: string): TypeError {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n}\n\nexport function IsCountQueuingStrategy(x: any): x is CountQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof CountQueuingStrategy;\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from '../transform-stream/transformer';\nimport { TransformStreamDefaultController } from '../transform-stream';\n\nexport function convertTransformer(original: Transformer | null,\n context: string): ValidatedTransformer {\n assertDictionary(original, context);\n const cancel = original?.cancel;\n const flush = original?.flush;\n const readableType = original?.readableType;\n const start = original?.start;\n const transform = original?.transform;\n const writableType = original?.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original!, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original!, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original!, `${context} has member 'transform' that`),\n writableType\n };\n}\n\nfunction convertTransformerFlushCallback(\n fn: TransformerFlushCallback,\n original: Transformer,\n context: string\n): (controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertTransformerStartCallback(\n fn: TransformerStartCallback,\n original: Transformer,\n context: string\n): TransformerStartCallback {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertTransformerTransformCallback(\n fn: TransformerTransformCallback,\n original: Transformer,\n context: string\n): (chunk: I, controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: I, controller: TransformStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n\nfunction convertTransformerCancelCallback(\n fn: TransformerCancelCallback,\n original: Transformer,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith,\n uponPromise\n} from './helpers/webidl';\nimport { CreateReadableStream, type DefaultReadableStream, ReadableStream } from './readable-stream';\nimport {\n ReadableStreamDefaultControllerCanCloseOrEnqueue,\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError,\n ReadableStreamDefaultControllerGetDesiredSize,\n ReadableStreamDefaultControllerHasBackpressure\n} from './readable-stream/default-controller';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { CreateWritableStream, WritableStream, WritableStreamDefaultControllerErrorIfNeeded } from './writable-stream';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from './transform-stream/transformer';\nimport { convertTransformer } from './validators/transformer';\n\n// Class TransformStream\n\n/**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\nexport class TransformStream {\n /** @internal */\n _writable!: WritableStream;\n /** @internal */\n _readable!: DefaultReadableStream;\n /** @internal */\n _backpressure!: boolean;\n /** @internal */\n _backpressureChangePromise!: Promise;\n /** @internal */\n _backpressureChangePromise_resolve!: () => void;\n /** @internal */\n _transformStreamController!: TransformStreamDefaultController;\n\n constructor(\n transformer?: Transformer,\n writableStrategy?: QueuingStrategy,\n readableStrategy?: QueuingStrategy\n );\n constructor(rawTransformer: Transformer | null | undefined = {},\n rawWritableStrategy: QueuingStrategy | null | undefined = {},\n rawReadableStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(\n this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm\n );\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n } else {\n startPromise_resolve(undefined);\n }\n }\n\n /**\n * The readable side of the transform stream.\n */\n get readable(): ReadableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n\n return this._readable;\n }\n\n /**\n * The writable side of the transform stream.\n */\n get writable(): WritableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n\n return this._writable;\n }\n}\n\nObject.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n}\n\nexport type {\n Transformer,\n TransformerCancelCallback,\n TransformerStartCallback,\n TransformerFlushCallback,\n TransformerTransformCallback\n};\n\n// Transform Stream Abstract Operations\n\nexport function CreateTransformStream(startAlgorithm: () => void | PromiseLike,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n writableHighWaterMark = 1,\n writableSizeAlgorithm: QueuingStrategySizeCallback = () => 1,\n readableHighWaterMark = 0,\n readableSizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(writableHighWaterMark));\n assert(IsNonNegativeNumber(readableHighWaterMark));\n\n const stream: TransformStream = Object.create(TransformStream.prototype);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n\n const startResult = startAlgorithm();\n startPromise_resolve(startResult);\n return stream;\n}\n\nfunction InitializeTransformStream(stream: TransformStream,\n startPromise: Promise,\n writableHighWaterMark: number,\n writableSizeAlgorithm: QueuingStrategySizeCallback,\n readableHighWaterMark: number,\n readableSizeAlgorithm: QueuingStrategySizeCallback) {\n function startAlgorithm(): Promise {\n return startPromise;\n }\n\n function writeAlgorithm(chunk: I): Promise {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n\n function abortAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n\n function closeAlgorithm(): Promise {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm,\n writableHighWaterMark, writableSizeAlgorithm);\n\n function pullAlgorithm(): Promise {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n\n function cancelAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined!;\n stream._backpressureChangePromise = undefined!;\n stream._backpressureChangePromise_resolve = undefined!;\n TransformStreamSetBackpressure(stream, true);\n\n stream._transformStreamController = undefined!;\n}\n\nfunction IsTransformStream(x: unknown): x is TransformStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n\n return x instanceof TransformStream;\n}\n\n// This is a no-op if both sides are already errored.\nfunction TransformStreamError(stream: TransformStream, e: any) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n}\n\nfunction TransformStreamErrorWritableAndUnblockWrite(stream: TransformStream, e: any) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n}\n\nfunction TransformStreamUnblockWrite(stream: TransformStream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure()\n // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time\n // _backpressure is set.\n TransformStreamSetBackpressure(stream, false);\n }\n}\n\nfunction TransformStreamSetBackpressure(stream: TransformStream, backpressure: boolean) {\n // Passes also when called during construction.\n assert(stream._backpressure !== backpressure);\n\n if (stream._backpressureChangePromise !== undefined) {\n stream._backpressureChangePromise_resolve();\n }\n\n stream._backpressureChangePromise = newPromise(resolve => {\n stream._backpressureChangePromise_resolve = resolve;\n });\n\n stream._backpressure = backpressure;\n}\n\n// Class TransformStreamDefaultController\n\n/**\n * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}.\n *\n * @public\n */\nexport class TransformStreamDefaultController {\n /** @internal */\n _controlledTransformStream: TransformStream;\n /** @internal */\n _finishPromise: Promise | undefined;\n /** @internal */\n _finishPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _finishPromise_reject?: (reason: any) => void;\n /** @internal */\n _transformAlgorithm: (chunk: any) => Promise;\n /** @internal */\n _flushAlgorithm: () => Promise;\n /** @internal */\n _cancelAlgorithm: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full.\n */\n get desiredSize(): number | null {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n const readableController = this._controlledTransformStream._readable._readableStreamController;\n return ReadableStreamDefaultControllerGetDesiredSize(readableController);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the readable side of the controlled transform stream.\n */\n enqueue(chunk: O): void;\n enqueue(chunk: O = undefined!): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n TransformStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors both the readable side and the writable side of the controlled transform stream, making all future\n * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.\n */\n error(reason: any = undefined): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n TransformStreamDefaultControllerError(this, reason);\n }\n\n /**\n * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate(): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n\n TransformStreamDefaultControllerTerminate(this);\n }\n}\n\nObject.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(TransformStreamDefaultController.prototype.error, 'error');\nsetFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n}\n\n// Transform Stream Default Controller Abstract Operations\n\nfunction IsTransformStreamDefaultController(x: any): x is TransformStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n\n return x instanceof TransformStreamDefaultController;\n}\n\nfunction SetUpTransformStreamDefaultController(stream: TransformStream,\n controller: TransformStreamDefaultController,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise) {\n assert(IsTransformStream(stream));\n assert(stream._transformStreamController === undefined);\n\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nfunction SetUpTransformStreamDefaultControllerFromTransformer(stream: TransformStream,\n transformer: ValidatedTransformer) {\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n let transformAlgorithm: (chunk: I) => Promise;\n let flushAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform!(chunk, controller);\n } else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk as unknown as O);\n return promiseResolvedWith(undefined);\n } catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush!(controller);\n } else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n}\n\nfunction TransformStreamDefaultControllerClearAlgorithms(controller: TransformStreamDefaultController) {\n controller._transformAlgorithm = undefined!;\n controller._flushAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\nfunction TransformStreamDefaultControllerEnqueue(controller: TransformStreamDefaultController, chunk: O) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n\n // We throttle transform invocations based on the backpressure of the ReadableStream, but we still\n // accept TransformStreamDefaultControllerEnqueue() calls.\n\n try {\n ReadableStreamDefaultControllerEnqueue(readableController, chunk);\n } catch (e) {\n // This happens when readableStrategy.size() throws.\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n\n throw stream._readable._storedError;\n }\n\n const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);\n if (backpressure !== stream._backpressure) {\n assert(backpressure);\n TransformStreamSetBackpressure(stream, true);\n }\n}\n\nfunction TransformStreamDefaultControllerError(controller: TransformStreamDefaultController, e: any) {\n TransformStreamError(controller._controlledTransformStream, e);\n}\n\nfunction TransformStreamDefaultControllerPerformTransform(controller: TransformStreamDefaultController,\n chunk: I) {\n const transformPromise = controller._transformAlgorithm(chunk);\n return transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n}\n\nfunction TransformStreamDefaultControllerTerminate(controller: TransformStreamDefaultController) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n\n ReadableStreamDefaultControllerClose(readableController);\n\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n}\n\n// TransformStreamDefaultSink Algorithms\n\nfunction TransformStreamDefaultSinkWriteAlgorithm(stream: TransformStream, chunk: I): Promise {\n assert(stream._writable._state === 'writable');\n\n const controller = stream._transformStreamController;\n\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n assert(backpressureChangePromise !== undefined);\n return transformPromiseWith(backpressureChangePromise, () => {\n const writable = stream._writable;\n const state = writable._state;\n if (state === 'erroring') {\n throw writable._storedError;\n }\n assert(state === 'writable');\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n });\n }\n\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n}\n\nfunction TransformStreamDefaultSinkAbortAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally,\n // we don't run the _cancelAlgorithm again.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerError(readable._readableStreamController, reason);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\nfunction TransformStreamDefaultSinkCloseAlgorithm(stream: TransformStream): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// TransformStreamDefaultSource Algorithms\n\nfunction TransformStreamDefaultSourcePullAlgorithm(stream: TransformStream): Promise {\n // Invariant. Enforced by the promises returned by start() and pull().\n assert(stream._backpressure);\n\n assert(stream._backpressureChangePromise !== undefined);\n\n TransformStreamSetBackpressure(stream, false);\n\n // Prevent the next pull() call until there is backpressure.\n return stream._backpressureChangePromise;\n}\n\nfunction TransformStreamDefaultSourceCancelAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._writable cannot change after construction, so caching it across a call to user code is safe.\n const writable = stream._writable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or\n // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the\n // _flushAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (writable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, writable._storedError);\n } else {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// Helper functions for the TransformStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n}\n\nexport function defaultControllerFinishPromiseResolve(controller: TransformStreamDefaultController) {\n if (controller._finishPromise_resolve === undefined) {\n return;\n }\n\n controller._finishPromise_resolve();\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nexport function defaultControllerFinishPromiseReject(controller: TransformStreamDefaultController, reason: any) {\n if (controller._finishPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(controller._finishPromise!);\n controller._finishPromise_reject(reason);\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\n// Helper functions for the TransformStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStream.prototype.${name} can only be used on a TransformStream`);\n}\n","import {\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n ReadableByteStreamController,\n ReadableStream,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultController,\n ReadableStreamDefaultReader,\n TransformStream,\n TransformStreamDefaultController,\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter\n} from './ponyfill';\nimport { globals } from './globals';\n\n// Export\nexport * from './ponyfill';\n\nconst exports = {\n ReadableStream,\n ReadableStreamDefaultController,\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader,\n\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter,\n\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n\n TransformStream,\n TransformStreamDefaultController\n};\n\n// Add classes to global scope\nif (typeof 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Symbol.toStringTag&&Object.defineProperty(ReadableStreamDefaultReader.prototype,Symbol.toStringTag,{value:"ReadableStreamDefaultReader",configurable:!0});const ee=Object.getPrototypeOf(Object.getPrototypeOf((async function*(){})).prototype);class te{constructor(e,t){this._ongoingPromise=void 0,this._isFinished=!1,this._reader=e,this._preventCancel=t}next(){const e=()=>this._nextSteps();return this._ongoingPromise=this._ongoingPromise?h(this._ongoingPromise,e,e):e(),this._ongoingPromise}return(e){const t=()=>this._returnSteps(e);return this._ongoingPromise?h(this._ongoingPromise,t,t):t()}_nextSteps(){if(this._isFinished)return Promise.resolve({value:void 0,done:!0});const e=this._reader;let t,r;const o=s(((e,o)=>{t=e,r=o}));return J(e,{_chunkSteps:e=>{this._ongoingPromise=void 0,p((()=>t({value:e,done:!1})))},_closeSteps:()=>{this._ongoingPromise=void 0,this._isFinished=!0,E(e),t({value:void 0,done:!0})},_errorSteps:t=>{this._ongoingPromise=void 0,this._isFinished=!0,E(e),r(t)}}),o}_returnSteps(e){if(this._isFinished)return Promise.resolve({value:e,done:!0});this._isFinished=!0;const t=this._reader;if(!this._preventCancel){const r=q(t,e);return E(t),h(r,(()=>({value:e,done:!0})))}return E(t),u({value:e,done:!0})}}const re={next(){return oe(this)?this._asyncIteratorImpl.next():c(ne("next"))},return(e){return oe(this)?this._asyncIteratorImpl.return(e):c(ne("return"))}};function oe(e){if(!r(e))return!1;if(!Object.prototype.hasOwnProperty.call(e,"_asyncIteratorImpl"))return!1;try{return e._asyncIteratorImpl instanceof te}catch(e){return!1}}function ne(e){return new TypeError(`ReadableStreamAsyncIterator.${e} can only be used on a ReadableSteamAsyncIterator`)}Object.setPrototypeOf(re,ee);const ae=Number.isNaN||function(e){return e!=e};var ie,le,se;function ue(e){return e.slice()}function ce(e,t,r,o,n){new Uint8Array(e).set(new Uint8Array(r,o,n),t)}let de=e=>(de="function"==typeof e.transfer?e=>e.transfer():"function"==typeof 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have non-zero byteLength");if(this._closeRequested)throw new TypeError("stream is closed or draining");const t=this._controlledReadableByteStream._state;if("readable"!==t)throw new TypeError(`The stream (in ${t} state) is not in the readable state and cannot be enqueued to`);Me(this,e)}error(e=void 0){if(!we(this))throw Xe("error");Ye(this,e)}[R](e){Ce(this),ge(this);const t=this._cancelAlgorithm(e);return Ie(this),t}[T](e){const t=this._controlledReadableByteStream;if(this._queueTotalSize>0)return void Qe(this,e);const r=this._autoAllocateChunkSize;if(void 0!==r){let t;try{t=new ArrayBuffer(r)}catch(t){return void e._errorSteps(t)}const o={buffer:t,bufferByteLength:r,byteOffset:0,byteLength:r,bytesFilled:0,minimumFill:1,elementSize:1,viewConstructor:Uint8Array,readerType:"default"};this._pendingPullIntos.push(o)}H(t,e),Te(this)}[C](){if(this._pendingPullIntos.length>0){const e=this._pendingPullIntos.peek();e.readerType="none",this._pendingPullIntos=new 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ke(e){0===e._queueTotalSize&&e._closeRequested?(Ie(e),Wr(e._controlledReadableByteStream)):Te(e)}function Ae(e){null!==e._byobRequest&&(e._byobRequest._associatedReadableByteStreamController=void 0,e._byobRequest._view=null,e._byobRequest=null)}function De(e){for(;e._pendingPullIntos.length>0;){if(0===e._queueTotalSize)return;const t=e._pendingPullIntos.peek();Oe(e,t)&&(Fe(e),Pe(e._controlledReadableByteStream,t))}}function ze(e,t,r,o){const n=e._controlledReadableByteStream,a=t.constructor,i=function(e){return ve(e)?1:e.BYTES_PER_ELEMENT}(a),{byteOffset:l,byteLength:s}=t,u=r*i;let c;try{c=de(t.buffer)}catch(e){return void o._errorSteps(e)}const d={buffer:c,bufferByteLength:c.byteLength,byteOffset:l,byteLength:s,bytesFilled:0,minimumFill:u,elementSize:i,viewConstructor:a,readerType:"byob"};if(e._pendingPullIntos.length>0)return e._pendingPullIntos.push(d),void Ze(n,o);if("closed"!==n._state){if(e._queueTotalSize>0){if(Oe(e,d)){const t=qe(d);return ke(e),void 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t=e._controlledReadableByteStream;if(!e._closeRequested&&"readable"===t._state)if(e._queueTotalSize>0)e._closeRequested=!0;else{if(e._pendingPullIntos.length>0){const t=e._pendingPullIntos.peek();if(t.bytesFilled%t.elementSize!=0){const t=new TypeError("Insufficient bytes to fill elements in the given buffer");throw Ye(e,t),t}}Ie(e),Wr(t)}}function Me(e,t){const r=e._controlledReadableByteStream;if(e._closeRequested||"readable"!==r._state)return;const{buffer:o,byteOffset:n,byteLength:a}=t;if(fe(o))throw new TypeError("chunk's buffer is detached and so cannot be enqueued");const i=de(o);if(e._pendingPullIntos.length>0){const t=e._pendingPullIntos.peek();if(fe(t.buffer))throw new TypeError("The BYOB request's buffer has been detached and so cannot be filled with an enqueued chunk");Ae(e),t.buffer=de(t.buffer),"none"===t.readerType&&Be(e,t)}if(G(r))if(function(e){const 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ReadableStreamBYOBReader{constructor(e){if(I(e,1,"ReadableStreamBYOBReader"),x(e,"First parameter"),qr(e))throw new TypeError("This stream has already been locked for exclusive reading by another reader");if(!we(e._readableStreamController))throw new TypeError("Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte source");P(this,e),this._readIntoRequests=new g}get closed(){return rt(this)?this._closedPromise:c(at("closed"))}cancel(e=void 0){return rt(this)?void 0===this._ownerReadableStream?c(W("cancel")):q(this,e):c(at("cancel"))}read(e,t={}){if(!rt(this))return c(at("read"));if(!ArrayBuffer.isView(e))return c(new TypeError("view must be an array buffer view"));if(0===e.byteLength)return c(new TypeError("view must have non-zero byteLength"));if(0===e.buffer.byteLength)return c(new TypeError("view's buffer must have non-zero byteLength"));if(fe(e.buffer))return c(new TypeError("view's buffer has been detached"));let r;try{r=function(e,t){var r;return 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mt(e,t){if(!yt(e))throw new TypeError(`${t} is not a WritableStream.`)}Object.defineProperties(ReadableStreamBYOBReader.prototype,{cancel:{enumerable:!0},read:{enumerable:!0},releaseLock:{enumerable:!0},closed:{enumerable:!0}}),n(ReadableStreamBYOBReader.prototype.cancel,"cancel"),n(ReadableStreamBYOBReader.prototype.read,"read"),n(ReadableStreamBYOBReader.prototype.releaseLock,"releaseLock"),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(ReadableStreamBYOBReader.prototype,Symbol.toStringTag,{value:"ReadableStreamBYOBReader",configurable:!0});const ht="function"==typeof AbortController;class WritableStream{constructor(e={},t={}){void 0===e?e=null:F(e,"First parameter");const r=st(t,"Second parameter"),o=function(e,t){z(e,t);const r=null==e?void 0:e.abort,o=null==e?void 0:e.close,n=null==e?void 0:e.start,a=null==e?void 0:e.type,i=null==e?void 0:e.write;return{abort:void 0===r?void 0:ct(r,e,`${t} has member 'abort' that`),close:void 0===o?void 0:dt(o,e,`${t} has member 'close' that`),start:void 0===n?void 0:ft(n,e,`${t} has member 'start' that`),write:void 0===i?void 0:bt(i,e,`${t} has member 'write' that`),type:a}}(e,"First parameter");pt(this);if(void 0!==o.type)throw new RangeError("Invalid type is specified");const n=lt(r);!function(e,t,r,o){const n=Object.create(WritableStreamDefaultController.prototype);let a,i,l,s;a=void 0!==t.start?()=>t.start(n):()=>{};i=void 0!==t.write?e=>t.write(e,n):()=>u(void 0);l=void 0!==t.close?()=>t.close():()=>u(void 0);s=void 0!==t.abort?e=>t.abort(e):()=>u(void 0);zt(e,n,a,i,l,s,r,o)}(this,o,it(r,1),n)}get locked(){if(!yt(this))throw Qt("locked");return St(this)}abort(e=void 0){return yt(this)?St(this)?c(new TypeError("Cannot abort a stream that already has a writer")):gt(this,e):c(Qt("abort"))}close(){return yt(this)?St(this)?c(new TypeError("Cannot close a stream that already has a writer")):Ct(this)?c(new TypeError("Cannot close an already-closing stream")):vt(this):c(Qt("close"))}getWriter(){if(!yt(this))throw Qt("getWriter");return _t(this)}}function _t(e){return new WritableStreamDefaultWriter(e)}function pt(e){e._state="writable",e._storedError=void 0,e._writer=void 0,e._writableStreamController=void 0,e._writeRequests=new g,e._inFlightWriteRequest=void 0,e._closeRequest=void 0,e._inFlightCloseRequest=void 0,e._pendingAbortRequest=void 0,e._backpressure=!1}function yt(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_writableStreamController")&&e instanceof WritableStream)}function St(e){return void 0!==e._writer}function gt(e,t){var r;if("closed"===e._state||"errored"===e._state)return u(void 0);e._writableStreamController._abortReason=t,null===(r=e._writableStreamController._abortController)||void 0===r||r.abort(t);const o=e._state;if("closed"===o||"errored"===o)return u(void 0);if(void 0!==e._pendingAbortRequest)return e._pendingAbortRequest._promise;let n=!1;"erroring"===o&&(n=!0,t=void 0);const a=s(((r,o)=>{e._pendingAbortRequest={_promise:void 0,_resolve:r,_reject:o,_reason:t,_wasAlreadyErroring:n}}));return e._pendingAbortRequest._promise=a,n||Rt(e,t),a}function vt(e){const t=e._state;if("closed"===t||"errored"===t)return c(new TypeError(`The stream (in ${t} state) is not in the writable state and cannot be closed`));const r=s(((t,r)=>{const o={_resolve:t,_reject:r};e._closeRequest=o})),o=e._writer;var n;return void 0!==o&&e._backpressure&&"writable"===t&&tr(o),Se(n=e._writableStreamController,At,0),It(n),r}function wt(e,t){"writable"!==e._state?Tt(e):Rt(e,t)}function Rt(e,t){const r=e._writableStreamController;e._state="erroring",e._storedError=t;const o=e._writer;void 0!==o&&Ot(o,t),!function(e){if(void 0===e._inFlightWriteRequest&&void 0===e._inFlightCloseRequest)return!1;return!0}(e)&&r._started&&Tt(e)}function Tt(e){e._state="errored",e._writableStreamController[w]();const t=e._storedError;if(e._writeRequests.forEach((e=>{e._reject(t)})),e._writeRequests=new g,void 0===e._pendingAbortRequest)return void Pt(e);const r=e._pendingAbortRequest;if(e._pendingAbortRequest=void 0,r._wasAlreadyErroring)return r._reject(t),void Pt(e);f(e._writableStreamController[v](r._reason),(()=>(r._resolve(),Pt(e),null)),(t=>(r._reject(t),Pt(e),null)))}function Ct(e){return void 0!==e._closeRequest||void 0!==e._inFlightCloseRequest}function Pt(e){void 0!==e._closeRequest&&(e._closeRequest._reject(e._storedError),e._closeRequest=void 0);const t=e._writer;void 0!==t&&Gt(t,e._storedError)}function qt(e,t){const r=e._writer;void 0!==r&&t!==e._backpressure&&(t?function(e){Jt(e)}(r):tr(r)),e._backpressure=t}Object.defineProperties(WritableStream.prototype,{abort:{enumerable:!0},close:{enumerable:!0},getWriter:{enumerable:!0},locked:{enumerable:!0}}),n(WritableStream.prototype.abort,"abort"),n(WritableStream.prototype.close,"close"),n(WritableStream.prototype.getWriter,"getWriter"),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(WritableStream.prototype,Symbol.toStringTag,{value:"WritableStream",configurable:!0});class WritableStreamDefaultWriter{constructor(e){if(I(e,1,"WritableStreamDefaultWriter"),mt(e,"First parameter"),St(e))throw new TypeError("This stream has already been locked for exclusive writing by another writer");this._ownerWritableStream=e,e._writer=this;const t=e._state;if("writable"===t)!Ct(e)&&e._backpressure?Jt(this):Zt(this),Vt(this);else if("erroring"===t)Kt(this,e._storedError),Vt(this);else if("closed"===t)Zt(this),Vt(r=this),Xt(r);else{const t=e._storedError;Kt(this,t),Ut(this,t)}var r}get closed(){return Et(this)?this._closedPromise:c(Nt("closed"))}get desiredSize(){if(!Et(this))throw Nt("desiredSize");if(void 0===this._ownerWritableStream)throw Ht("desiredSize");return function(e){const t=e._ownerWritableStream,r=t._state;if("errored"===r||"erroring"===r)return null;if("closed"===r)return 0;return Ft(t._writableStreamController)}(this)}get ready(){return Et(this)?this._readyPromise:c(Nt("ready"))}abort(e=void 0){return Et(this)?void 0===this._ownerWritableStream?c(Ht("abort")):function(e,t){return gt(e._ownerWritableStream,t)}(this,e):c(Nt("abort"))}close(){if(!Et(this))return c(Nt("close"));const e=this._ownerWritableStream;return void 0===e?c(Ht("close")):Ct(e)?c(new TypeError("Cannot close an already-closing stream")):Wt(this)}releaseLock(){if(!Et(this))throw Nt("releaseLock");void 0!==this._ownerWritableStream&&jt(this)}write(e=void 0){return Et(this)?void 0===this._ownerWritableStream?c(Ht("write to")):kt(this,e):c(Nt("write"))}}function Et(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_ownerWritableStream")&&e instanceof WritableStreamDefaultWriter)}function Wt(e){return vt(e._ownerWritableStream)}function Bt(e,t){"pending"===e._closedPromiseState?Gt(e,t):function(e,t){Ut(e,t)}(e,t)}function Ot(e,t){"pending"===e._readyPromiseState?er(e,t):function(e,t){Kt(e,t)}(e,t)}function jt(e){const t=e._ownerWritableStream,r=new TypeError("Writer was released and can no longer be used to monitor the stream's closedness");Ot(e,r),Bt(e,r),t._writer=void 0,e._ownerWritableStream=void 0}function kt(e,t){const r=e._ownerWritableStream,o=r._writableStreamController,n=function(e,t){try{return e._strategySizeAlgorithm(t)}catch(t){return $t(e,t),1}}(o,t);if(r!==e._ownerWritableStream)return c(Ht("write to"));const a=r._state;if("errored"===a)return c(r._storedError);if(Ct(r)||"closed"===a)return c(new TypeError("The stream is closing or closed and cannot be written to"));if("erroring"===a)return c(r._storedError);const i=function(e){return s(((t,r)=>{const o={_resolve:t,_reject:r};e._writeRequests.push(o)}))}(r);return function(e,t,r){try{Se(e,t,r)}catch(t){return void $t(e,t)}const o=e._controlledWritableStream;if(!Ct(o)&&"writable"===o._state){qt(o,Mt(e))}It(e)}(o,t,n),i}Object.defineProperties(WritableStreamDefaultWriter.prototype,{abort:{enumerable:!0},close:{enumerable:!0},releaseLock:{enumerable:!0},write:{enumerable:!0},closed:{enumerable:!0},desiredSize:{enumerable:!0},ready:{enumerable:!0}}),n(WritableStreamDefaultWriter.prototype.abort,"abort"),n(WritableStreamDefaultWriter.prototype.close,"close"),n(WritableStreamDefaultWriter.prototype.releaseLock,"releaseLock"),n(WritableStreamDefaultWriter.prototype.write,"write"),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(WritableStreamDefaultWriter.prototype,Symbol.toStringTag,{value:"WritableStreamDefaultWriter",configurable:!0});const At={};class WritableStreamDefaultController{constructor(){throw new TypeError("Illegal constructor")}get abortReason(){if(!Dt(this))throw xt("abortReason");return this._abortReason}get signal(){if(!Dt(this))throw xt("signal");if(void 0===this._abortController)throw new TypeError("WritableStreamDefaultController.prototype.signal is not supported");return this._abortController.signal}error(e=void 0){if(!Dt(this))throw xt("error");"writable"===this._controlledWritableStream._state&&Yt(this,e)}[v](e){const t=this._abortAlgorithm(e);return Lt(this),t}[w](){ge(this)}}function Dt(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_controlledWritableStream")&&e instanceof WritableStreamDefaultController)}function zt(e,t,r,o,n,a,i,l){t._controlledWritableStream=e,e._writableStreamController=t,t._queue=void 0,t._queueTotalSize=void 0,ge(t),t._abortReason=void 0,t._abortController=function(){if(ht)return new AbortController}(),t._started=!1,t._strategySizeAlgorithm=l,t._strategyHWM=i,t._writeAlgorithm=o,t._closeAlgorithm=n,t._abortAlgorithm=a;const s=Mt(t);qt(e,s);f(u(r()),(()=>(t._started=!0,It(t),null)),(r=>(t._started=!0,wt(e,r),null)))}function Lt(e){e._writeAlgorithm=void 0,e._closeAlgorithm=void 0,e._abortAlgorithm=void 0,e._strategySizeAlgorithm=void 0}function Ft(e){return e._strategyHWM-e._queueTotalSize}function It(e){const t=e._controlledWritableStream;if(!e._started)return;if(void 0!==t._inFlightWriteRequest)return;if("erroring"===t._state)return void Tt(t);if(0===e._queue.length)return;const r=e._queue.peek().value;r===At?function(e){const t=e._controlledWritableStream;(function(e){e._inFlightCloseRequest=e._closeRequest,e._closeRequest=void 0})(t),ye(e);const r=e._closeAlgorithm();Lt(e),f(r,(()=>(function(e){e._inFlightCloseRequest._resolve(void 0),e._inFlightCloseRequest=void 0,"erroring"===e._state&&(e._storedError=void 0,void 0!==e._pendingAbortRequest&&(e._pendingAbortRequest._resolve(),e._pendingAbortRequest=void 0)),e._state="closed";const t=e._writer;void 0!==t&&Xt(t)}(t),null)),(e=>(function(e,t){e._inFlightCloseRequest._reject(t),e._inFlightCloseRequest=void 0,void 0!==e._pendingAbortRequest&&(e._pendingAbortRequest._reject(t),e._pendingAbortRequest=void 0),wt(e,t)}(t,e),null)))}(e):function(e,t){const r=e._controlledWritableStream;!function(e){e._inFlightWriteRequest=e._writeRequests.shift()}(r);const o=e._writeAlgorithm(t);f(o,(()=>{!function(e){e._inFlightWriteRequest._resolve(void 0),e._inFlightWriteRequest=void 0}(r);const t=r._state;if(ye(e),!Ct(r)&&"writable"===t){const t=Mt(e);qt(r,t)}return It(e),null}),(t=>("writable"===r._state&&Lt(e),function(e,t){e._inFlightWriteRequest._reject(t),e._inFlightWriteRequest=void 0,wt(e,t)}(r,t),null)))}(e,r)}function $t(e,t){"writable"===e._controlledWritableStream._state&&Yt(e,t)}function Mt(e){return Ft(e)<=0}function Yt(e,t){const r=e._controlledWritableStream;Lt(e),Rt(r,t)}function Qt(e){return new TypeError(`WritableStream.prototype.${e} can only be used on a WritableStream`)}function xt(e){return new TypeError(`WritableStreamDefaultController.prototype.${e} can only be used on a WritableStreamDefaultController`)}function Nt(e){return new TypeError(`WritableStreamDefaultWriter.prototype.${e} can only be used on a WritableStreamDefaultWriter`)}function Ht(e){return new TypeError("Cannot "+e+" a stream using a released writer")}function Vt(e){e._closedPromise=s(((t,r)=>{e._closedPromise_resolve=t,e._closedPromise_reject=r,e._closedPromiseState="pending"}))}function Ut(e,t){Vt(e),Gt(e,t)}function Gt(e,t){void 0!==e._closedPromise_reject&&(_(e._closedPromise),e._closedPromise_reject(t),e._closedPromise_resolve=void 0,e._closedPromise_reject=void 0,e._closedPromiseState="rejected")}function Xt(e){void 0!==e._closedPromise_resolve&&(e._closedPromise_resolve(void 0),e._closedPromise_resolve=void 0,e._closedPromise_reject=void 0,e._closedPromiseState="resolved")}function Jt(e){e._readyPromise=s(((t,r)=>{e._readyPromise_resolve=t,e._readyPromise_reject=r})),e._readyPromiseState="pending"}function Kt(e,t){Jt(e),er(e,t)}function Zt(e){Jt(e),tr(e)}function er(e,t){void 0!==e._readyPromise_reject&&(_(e._readyPromise),e._readyPromise_reject(t),e._readyPromise_resolve=void 0,e._readyPromise_reject=void 0,e._readyPromiseState="rejected")}function tr(e){void 0!==e._readyPromise_resolve&&(e._readyPromise_resolve(void 0),e._readyPromise_resolve=void 0,e._readyPromise_reject=void 0,e._readyPromiseState="fulfilled")}Object.defineProperties(WritableStreamDefaultController.prototype,{abortReason:{enumerable:!0},signal:{enumerable:!0},error:{enumerable:!0}}),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(WritableStreamDefaultController.prototype,Symbol.toStringTag,{value:"WritableStreamDefaultController",configurable:!0});const rr="undefined"!=typeof globalThis?globalThis:"undefined"!=typeof self?self:"undefined"!=typeof global?global:void 0;const or=function(){const e=null==rr?void 0:rr.DOMException;return function(e){if("function"!=typeof e&&"object"!=typeof e)return!1;if("DOMException"!==e.name)return!1;try{return new e,!0}catch(e){return!1}}(e)?e:void 0}()||function(){const e=function(e,t){this.message=e||"",this.name=t||"Error",Error.captureStackTrace&&Error.captureStackTrace(this,this.constructor)};return n(e,"DOMException"),e.prototype=Object.create(Error.prototype),Object.defineProperty(e.prototype,"constructor",{value:e,writable:!0,configurable:!0}),e}();function nr(e,r,o,n,a,i){const l=N(e),h=_t(r);e._disturbed=!0;let p=!1,y=u(void 0);return s(((S,g)=>{let v;if(void 0!==i){if(v=()=>{const t=void 0!==i.reason?i.reason:new or("Aborted","AbortError"),o=[];n||o.push((()=>"writable"===r._state?gt(r,t):u(void 0))),a||o.push((()=>"readable"===e._state?Er(e,t):u(void 0))),q((()=>Promise.all(o.map((e=>e())))),!0,t)},i.aborted)return void v();i.addEventListener("abort",v)}var w,R,T;if(P(e,l._closedPromise,(e=>(n?W(!0,e):q((()=>gt(r,e)),!0,e),null))),P(r,h._closedPromise,(t=>(a?W(!0,t):q((()=>Er(e,t)),!0,t),null))),w=e,R=l._closedPromise,T=()=>(o?W():q((()=>function(e){const t=e._ownerWritableStream,r=t._state;return Ct(t)||"closed"===r?u(void 0):"errored"===r?c(t._storedError):Wt(e)}(h))),null),"closed"===w._state?T():b(R,T),Ct(r)||"closed"===r._state){const t=new TypeError("the destination writable stream closed before all data could be piped to it");a?W(!0,t):q((()=>Er(e,t)),!0,t)}function C(){const e=y;return d(y,(()=>e!==y?C():void 0))}function P(e,t,r){"errored"===e._state?r(e._storedError):m(t,r)}function q(e,t,o){function n(){return f(e(),(()=>B(t,o)),(e=>B(!0,e))),null}p||(p=!0,"writable"!==r._state||Ct(r)?n():b(C(),n))}function W(e,t){p||(p=!0,"writable"!==r._state||Ct(r)?B(e,t):b(C(),(()=>B(e,t))))}function B(e,t){return jt(h),E(l),void 0!==i&&i.removeEventListener("abort",v),e?g(t):S(void 0),null}_(s(((e,r)=>{!function o(n){n?e():d(p?u(!0):d(h._readyPromise,(()=>s(((e,r)=>{J(l,{_chunkSteps:r=>{y=d(kt(h,r),void 0,t),e(!1)},_closeSteps:()=>e(!0),_errorSteps:r})})))),o,r)}(!1)})))}))}class ReadableStreamDefaultController{constructor(){throw new TypeError("Illegal constructor")}get desiredSize(){if(!ar(this))throw hr("desiredSize");return fr(this)}close(){if(!ar(this))throw hr("close");if(!br(this))throw new TypeError("The stream is not in a state that permits close");ur(this)}enqueue(e=void 0){if(!ar(this))throw hr("enqueue");if(!br(this))throw new TypeError("The stream is not in a state that permits enqueue");return cr(this,e)}error(e=void 0){if(!ar(this))throw hr("error");dr(this,e)}[R](e){ge(this);const t=this._cancelAlgorithm(e);return sr(this),t}[T](e){const t=this._controlledReadableStream;if(this._queue.length>0){const r=ye(this);this._closeRequested&&0===this._queue.length?(sr(this),Wr(t)):ir(this),e._chunkSteps(r)}else H(t,e),ir(this)}[C](){}}function ar(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_controlledReadableStream")&&e instanceof ReadableStreamDefaultController)}function ir(e){if(!lr(e))return;if(e._pulling)return void(e._pullAgain=!0);e._pulling=!0;f(e._pullAlgorithm(),(()=>(e._pulling=!1,e._pullAgain&&(e._pullAgain=!1,ir(e)),null)),(t=>(dr(e,t),null)))}function lr(e){const t=e._controlledReadableStream;if(!br(e))return!1;if(!e._started)return!1;if(qr(t)&&U(t)>0)return!0;return fr(e)>0}function sr(e){e._pullAlgorithm=void 0,e._cancelAlgorithm=void 0,e._strategySizeAlgorithm=void 0}function ur(e){if(!br(e))return;const t=e._controlledReadableStream;e._closeRequested=!0,0===e._queue.length&&(sr(e),Wr(t))}function cr(e,t){if(!br(e))return;const r=e._controlledReadableStream;if(qr(r)&&U(r)>0)V(r,t,!1);else{let r;try{r=e._strategySizeAlgorithm(t)}catch(t){throw dr(e,t),t}try{Se(e,t,r)}catch(t){throw dr(e,t),t}}ir(e)}function dr(e,t){const r=e._controlledReadableStream;"readable"===r._state&&(ge(e),sr(e),Br(r,t))}function fr(e){const t=e._controlledReadableStream._state;return"errored"===t?null:"closed"===t?0:e._strategyHWM-e._queueTotalSize}function br(e){const t=e._controlledReadableStream._state;return!e._closeRequested&&"readable"===t}function mr(e,t,r,o,n,a,i){t._controlledReadableStream=e,t._queue=void 0,t._queueTotalSize=void 0,ge(t),t._started=!1,t._closeRequested=!1,t._pullAgain=!1,t._pulling=!1,t._strategySizeAlgorithm=i,t._strategyHWM=a,t._pullAlgorithm=o,t._cancelAlgorithm=n,e._readableStreamController=t;f(u(r()),(()=>(t._started=!0,ir(t),null)),(e=>(dr(t,e),null)))}function hr(e){return new TypeError(`ReadableStreamDefaultController.prototype.${e} can only be used on a ReadableStreamDefaultController`)}function _r(e,t){return we(e._readableStreamController)?function(e){let t,r,o,n,a,i=N(e),l=!1,c=!1,d=!1,f=!1,b=!1;const h=s((e=>{a=e}));function _(e){m(e._closedPromise,(t=>(e!==i||(Ye(o._readableStreamController,t),Ye(n._readableStreamController,t),f&&b||a(void 0)),null)))}function y(){rt(i)&&(E(i),i=N(e),_(i));J(i,{_chunkSteps:t=>{p((()=>{c=!1,d=!1;const r=t;let i=t;if(!f&&!b)try{i=pe(t)}catch(t){return Ye(o._readableStreamController,t),Ye(n._readableStreamController,t),void a(Er(e,t))}f||Me(o._readableStreamController,r),b||Me(n._readableStreamController,i),l=!1,c?g():d&&v()}))},_closeSteps:()=>{l=!1,f||$e(o._readableStreamController),b||$e(n._readableStreamController),o._readableStreamController._pendingPullIntos.length>0&&He(o._readableStreamController,0),n._readableStreamController._pendingPullIntos.length>0&&He(n._readableStreamController,0),f&&b||a(void 0)},_errorSteps:()=>{l=!1}})}function S(t,r){X(i)&&(E(i),i=Ke(e),_(i));const s=r?n:o,u=r?o:n;ot(i,t,1,{_chunkSteps:t=>{p((()=>{c=!1,d=!1;const o=r?b:f;if(r?f:b)o||Ve(s._readableStreamController,t);else{let r;try{r=pe(t)}catch(t){return Ye(s._readableStreamController,t),Ye(u._readableStreamController,t),void a(Er(e,t))}o||Ve(s._readableStreamController,t),Me(u._readableStreamController,r)}l=!1,c?g():d&&v()}))},_closeSteps:e=>{l=!1;const t=r?b:f,o=r?f:b;t||$e(s._readableStreamController),o||$e(u._readableStreamController),void 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Gr(r),f(n,(()=>("errored"===o._state?eo(r,o._storedError):(dr(o._readableStreamController,t),Zr(r)),null)),(e=>(dr(o._readableStreamController,e),eo(r,e),null))),r._finishPromise}(e,t)}function c(){return function(e){const t=e._transformStreamController;if(void 0!==t._finishPromise)return t._finishPromise;const r=e._readable;t._finishPromise=s(((e,r)=>{t._finishPromise_resolve=e,t._finishPromise_reject=r}));const o=t._flushAlgorithm();return Gr(t),f(o,(()=>("errored"===r._state?eo(t,r._storedError):(ur(r._readableStreamController),Zr(t)),null)),(e=>(dr(r._readableStreamController,e),eo(t,e),null))),t._finishPromise}(e)}function d(){return function(e){return Vr(e,!1),e._backpressureChangePromise}(e)}function b(t){return function(e,t){const r=e._transformStreamController;if(void 0!==r._finishPromise)return r._finishPromise;const o=e._writable;r._finishPromise=s(((e,t)=>{r._finishPromise_resolve=e,r._finishPromise_reject=t}));const n=r._cancelAlgorithm(t);return Gr(r),f(n,(()=>("errored"===o._state?eo(r,o._storedError):($t(o._writableStreamController,t),Hr(e),Zr(r)),null)),(t=>($t(o._writableStreamController,t),Hr(e),eo(r,t),null))),r._finishPromise}(e,t)}e._writable=function(e,t,r,o,n=1,a=(()=>1)){const i=Object.create(WritableStream.prototype);return pt(i),zt(i,Object.create(WritableStreamDefaultController.prototype),e,t,r,o,n,a),i}(i,l,c,u,r,o),e._readable=Rr(i,d,b,n,a),e._backpressure=void 0,e._backpressureChangePromise=void 0,e._backpressureChangePromise_resolve=void 0,Vr(e,!0),e._transformStreamController=void 0}(this,s((e=>{m=e})),d,b,i,l),function(e,t){const r=Object.create(TransformStreamDefaultController.prototype);let o,n,a;o=void 0!==t.transform?e=>t.transform(e,r):e=>{try{return Xr(r,e),u(void 0)}catch(e){return c(e)}};n=void 0!==t.flush?()=>t.flush(r):()=>u(void 0);a=void 0!==t.cancel?e=>t.cancel(e):()=>u(void 0);!function(e,t,r,o,n){t._controlledTransformStream=e,e._transformStreamController=t,t._transformAlgorithm=r,t._flushAlgorithm=o,t._cancelAlgorithm=n,t._finishPromise=void 0,t._finishPromise_resolve=void 0,t._finishPromise_reject=void 0}(e,r,o,n,a)}(this,a),void 0!==a.start?m(a.start(this._transformStreamController)):m(void 0)}get readable(){if(!Qr(this))throw to("readable");return this._readable}get writable(){if(!Qr(this))throw to("writable");return this._writable}}function Qr(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_transformStreamController")&&e instanceof TransformStream)}function xr(e,t){dr(e._readable._readableStreamController,t),Nr(e,t)}function Nr(e,t){Gr(e._transformStreamController),$t(e._writable._writableStreamController,t),Hr(e)}function Hr(e){e._backpressure&&Vr(e,!1)}function Vr(e,t){void 0!==e._backpressureChangePromise&&e._backpressureChangePromise_resolve(),e._backpressureChangePromise=s((t=>{e._backpressureChangePromise_resolve=t})),e._backpressure=t}Object.defineProperties(TransformStream.prototype,{readable:{enumerable:!0},writable:{enumerable:!0}}),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(TransformStream.prototype,Symbol.toStringTag,{value:"TransformStream",configurable:!0});class TransformStreamDefaultController{constructor(){throw new TypeError("Illegal constructor")}get desiredSize(){if(!Ur(this))throw Kr("desiredSize");return fr(this._controlledTransformStream._readable._readableStreamController)}enqueue(e=void 0){if(!Ur(this))throw Kr("enqueue");Xr(this,e)}error(e=void 0){if(!Ur(this))throw Kr("error");var t;t=e,xr(this._controlledTransformStream,t)}terminate(){if(!Ur(this))throw Kr("terminate");!function(e){const t=e._controlledTransformStream;ur(t._readable._readableStreamController);const r=new TypeError("TransformStream terminated");Nr(t,r)}(this)}}function Ur(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_controlledTransformStream")&&e instanceof TransformStreamDefaultController)}function Gr(e){e._transformAlgorithm=void 0,e._flushAlgorithm=void 0,e._cancelAlgorithm=void 0}function Xr(e,t){const r=e._controlledTransformStream,o=r._readable._readableStreamController;if(!br(o))throw new TypeError("Readable side is not in a state that permits enqueue");try{cr(o,t)}catch(e){throw Nr(r,e),r._readable._storedError}const n=function(e){return!lr(e)}(o);n!==r._backpressure&&Vr(r,!0)}function Jr(e,t){return h(e._transformAlgorithm(t),void 0,(t=>{throw xr(e._controlledTransformStream,t),t}))}function Kr(e){return new TypeError(`TransformStreamDefaultController.prototype.${e} can only be used on a TransformStreamDefaultController`)}function Zr(e){void 0!==e._finishPromise_resolve&&(e._finishPromise_resolve(),e._finishPromise_resolve=void 0,e._finishPromise_reject=void 0)}function eo(e,t){void 0!==e._finishPromise_reject&&(_(e._finishPromise),e._finishPromise_reject(t),e._finishPromise_resolve=void 0,e._finishPromise_reject=void 0)}function to(e){return new TypeError(`TransformStream.prototype.${e} can only be used on a TransformStream`)}Object.defineProperties(TransformStreamDefaultController.prototype,{enqueue:{enumerable:!0},error:{enumerable:!0},terminate:{enumerable:!0},desiredSize:{enumerable:!0}}),n(TransformStreamDefaultController.prototype.enqueue,"enqueue"),n(TransformStreamDefaultController.prototype.error,"error"),n(TransformStreamDefaultController.prototype.terminate,"terminate"),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(TransformStreamDefaultController.prototype,Symbol.toStringTag,{value:"TransformStreamDefaultController",configurable:!0});const ro={ReadableStream:ReadableStream,ReadableStreamDefaultController:ReadableStreamDefaultController,ReadableByteStreamController:ReadableByteStreamController,ReadableStreamBYOBRequest:ReadableStreamBYOBRequest,ReadableStreamDefaultReader:ReadableStreamDefaultReader,ReadableStreamBYOBReader:ReadableStreamBYOBReader,WritableStream:WritableStream,WritableStreamDefaultController:WritableStreamDefaultController,WritableStreamDefaultWriter:WritableStreamDefaultWriter,ByteLengthQueuingStrategy:ByteLengthQueuingStrategy,CountQueuingStrategy:CountQueuingStrategy,TransformStream:TransformStream,TransformStreamDefaultController:TransformStreamDefaultController};if(void 0!==rr)for(const e in ro)Object.prototype.hasOwnProperty.call(ro,e)&&Object.defineProperty(rr,e,{value:ro[e],writable:!0,configurable:!0});e.ByteLengthQueuingStrategy=ByteLengthQueuingStrategy,e.CountQueuingStrategy=CountQueuingStrategy,e.ReadableByteStreamController=ReadableByteStreamController,e.ReadableStream=ReadableStream,e.ReadableStreamBYOBReader=ReadableStreamBYOBReader,e.ReadableStreamBYOBRequest=ReadableStreamBYOBRequest,e.ReadableStreamDefaultController=ReadableStreamDefaultController,e.ReadableStreamDefaultReader=ReadableStreamDefaultReader,e.TransformStream=TransformStream,e.TransformStreamDefaultController=TransformStreamDefaultController,e.WritableStream=WritableStream,e.WritableStreamDefaultController=WritableStreamDefaultController,e.WritableStreamDefaultWriter=WritableStreamDefaultWriter})); +//# sourceMappingURL=polyfill.es2018.min.js.map diff --git a/node_modules/web-streams-polyfill/dist/polyfill.es2018.min.js.map b/node_modules/web-streams-polyfill/dist/polyfill.es2018.min.js.map new file mode 100644 index 00000000..2a68110c --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/polyfill.es2018.min.js.map @@ -0,0 +1 @@ +{"version":3,"file":"polyfill.es2018.min.js","sources":["../src/utils.ts","../src/lib/helpers/miscellaneous.ts","../src/lib/helpers/webidl.ts","../src/lib/simple-queue.ts","../src/lib/abstract-ops/internal-methods.ts","../src/lib/readable-stream/generic-reader.ts","../src/stub/number-isfinite.ts","../src/stub/math-trunc.ts","../src/lib/validators/basic.ts","../src/lib/validators/readable-stream.ts","../src/lib/readable-stream/default-reader.ts","../src/target/es2018/stub/async-iterator-prototype.ts","../src/lib/readable-stream/async-iterator.ts","../src/stub/number-isnan.ts","../src/lib/abstract-ops/ecmascript.ts","../src/lib/abstract-ops/miscellaneous.ts","../src/lib/abstract-ops/queue-with-sizes.ts","../src/lib/helpers/array-buffer-view.ts","../src/lib/readable-stream/byte-stream-controller.ts","../src/lib/readable-stream/byob-reader.ts","../src/lib/validators/reader-options.ts","../src/lib/abstract-ops/queuing-strategy.ts","../src/lib/validators/queuing-strategy.ts","../src/lib/validators/underlying-sink.ts","../src/lib/validators/writable-stream.ts","../src/lib/abort-signal.ts","../src/lib/writable-stream.ts","../src/globals.ts","../src/stub/dom-exception.ts","../src/lib/readable-stream/pipe.ts","../src/lib/readable-stream/default-controller.ts","../src/lib/readable-stream/tee.ts","../src/lib/readable-stream/from.ts","../src/lib/readable-stream/readable-stream-like.ts","../src/lib/validators/underlying-source.ts","../src/lib/validators/pipe-options.ts","../src/lib/readable-stream.ts","../src/lib/validators/readable-writable-pair.ts","../src/lib/validators/iterator-options.ts","../src/lib/validators/queuing-strategy-init.ts","../src/lib/byte-length-queuing-strategy.ts","../src/lib/count-queuing-strategy.ts","../src/lib/validators/transformer.ts","../src/lib/transform-stream.ts","../src/polyfill.ts"],"sourcesContent":["export function noop(): undefined {\n return undefined;\n}\n","import { noop } from '../../utils';\nimport { AssertionError } from '../../stub/assert';\n\nexport function typeIsObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport const rethrowAssertionErrorRejection: (e: any) => void =\n DEBUG ? e => {\n // Used throughout the reference implementation, as `.catch(rethrowAssertionErrorRejection)`, to ensure any errors\n // get shown. There are places in the spec where we do promise transformations and purposefully ignore or don't\n // expect any errors, but assertion errors are always problematic.\n if (e && e instanceof AssertionError) {\n setTimeout(() => {\n throw e;\n }, 0);\n }\n } : noop;\n\nexport function setFunctionName(fn: Function, name: string): void {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n } catch {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n}\n","import { rethrowAssertionErrorRejection } from './miscellaneous';\nimport assert from '../../stub/assert';\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\n\n// https://webidl.spec.whatwg.org/#a-new-promise\nexport function newPromise(executor: (\n resolve: (value: T | PromiseLike) => void,\n reject: (reason?: any) => void\n) => void): Promise {\n return new originalPromise(executor);\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-resolved-with\nexport function promiseResolvedWith(value: T | PromiseLike): Promise {\n return newPromise(resolve => resolve(value));\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-rejected-with\nexport function promiseRejectedWith(reason: any): Promise {\n return originalPromiseReject(reason);\n}\n\nexport function PerformPromiseThen(\n promise: Promise,\n onFulfilled?: (value: T) => TResult1 | PromiseLike,\n onRejected?: (reason: any) => TResult2 | PromiseLike): Promise {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected) as Promise;\n}\n\n// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n// from that handler. To prevent this, return null instead of void from all handlers.\n// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\nexport function uponPromise(\n promise: Promise,\n onFulfilled?: (value: T) => null | PromiseLike,\n onRejected?: (reason: any) => null | PromiseLike): void {\n PerformPromiseThen(\n PerformPromiseThen(promise, onFulfilled, onRejected),\n undefined,\n rethrowAssertionErrorRejection\n );\n}\n\nexport function uponFulfillment(promise: Promise, onFulfilled: (value: T) => null | PromiseLike): void {\n uponPromise(promise, onFulfilled);\n}\n\nexport function uponRejection(promise: Promise, onRejected: (reason: any) => null | PromiseLike): void {\n uponPromise(promise, undefined, onRejected);\n}\n\nexport function transformPromiseWith(\n promise: Promise,\n fulfillmentHandler?: (value: T) => TResult1 | PromiseLike,\n rejectionHandler?: (reason: any) => TResult2 | PromiseLike): Promise {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\n\nexport function setPromiseIsHandledToTrue(promise: Promise): void {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\nlet _queueMicrotask: (callback: () => void) => void = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n } else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n};\n\nexport { _queueMicrotask as queueMicrotask };\n\nexport function reflectCall(F: (this: T, ...fnArgs: A) => R, V: T, args: A): R {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n}\n\nexport function promiseCall(F: (this: T, ...fnArgs: A) => R | PromiseLike,\n V: T,\n args: A): Promise {\n assert(typeof F === 'function');\n assert(V !== undefined);\n assert(Array.isArray(args));\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n } catch (value) {\n return promiseRejectedWith(value);\n }\n}\n","import assert from '../stub/assert';\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n\ninterface Node {\n _elements: T[];\n _next: Node | undefined;\n}\n\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nexport class SimpleQueue {\n private _front: Node;\n private _back: Node;\n private _cursor = 0;\n private _size = 0;\n\n constructor() {\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n\n get length(): number {\n return this._size;\n }\n\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element: T): void {\n const oldBack = this._back;\n let newBack = oldBack;\n assert(oldBack._next === undefined);\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n assert(elements.length === QUEUE_MAX_ARRAY_SIZE);\n assert(oldFront._next !== undefined);\n newFront = oldFront._next!;\n newCursor = 0;\n }\n\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined!;\n\n return element;\n }\n\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback: (element: T) => void): void {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n assert(node._next !== undefined);\n assert(i === QUEUE_MAX_ARRAY_SIZE);\n node = node._next!;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n}\n","export const AbortSteps = Symbol('[[AbortSteps]]');\nexport const ErrorSteps = Symbol('[[ErrorSteps]]');\nexport const CancelSteps = Symbol('[[CancelSteps]]');\nexport const PullSteps = Symbol('[[PullSteps]]');\nexport const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n","import assert from '../../stub/assert';\nimport { ReadableStream, ReadableStreamCancel, type ReadableStreamReader } from '../readable-stream';\nimport { newPromise, setPromiseIsHandledToTrue } from '../helpers/webidl';\nimport { ReleaseSteps } from '../abstract-ops/internal-methods';\n\nexport function ReadableStreamReaderGenericInitialize(reader: ReadableStreamReader, stream: ReadableStream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n } else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n } else {\n assert(stream._state === 'errored');\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n}\n\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\n\nexport function ReadableStreamReaderGenericCancel(reader: ReadableStreamReader, reason: any): Promise {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n return ReadableStreamCancel(stream, reason);\n}\n\nexport function ReadableStreamReaderGenericRelease(reader: ReadableStreamReader) {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n assert(stream._reader === reader);\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n } else {\n defaultReaderClosedPromiseResetToRejected(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n\n stream._readableStreamController[ReleaseSteps]();\n\n stream._reader = undefined;\n reader._ownerReadableStream = undefined!;\n}\n\n// Helper functions for the readers.\n\nexport function readerLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nexport function defaultReaderClosedPromiseInitialize(reader: ReadableStreamReader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n}\n\nexport function defaultReaderClosedPromiseInitializeAsRejected(reader: ReadableStreamReader, reason: any) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseInitializeAsResolved(reader: ReadableStreamReader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n}\n\nexport function defaultReaderClosedPromiseReject(reader: ReadableStreamReader, reason: any) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n\nexport function defaultReaderClosedPromiseResetToRejected(reader: ReadableStreamReader, reason: any) {\n assert(reader._closedPromise_resolve === undefined);\n assert(reader._closedPromise_reject === undefined);\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseResolve(reader: ReadableStreamReader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite: typeof Number.isFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n};\n\nexport default NumberIsFinite;\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc: typeof Math.trunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\nexport default MathTrunc;\n","import NumberIsFinite from '../../stub/number-isfinite';\nimport MathTrunc from '../../stub/math-trunc';\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nexport function isDictionary(x: any): x is object | null {\n return typeof x === 'object' || typeof x === 'function';\n}\n\nexport function assertDictionary(obj: unknown,\n context: string): asserts obj is object | null | undefined {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport type AnyFunction = (...args: any[]) => any;\n\n// https://heycam.github.io/webidl/#idl-callback-functions\nexport function assertFunction(x: unknown, context: string): asserts x is AnyFunction {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-object\nexport function isObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport function assertObject(x: unknown,\n context: string): asserts x is object {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport function assertRequiredArgument(x: T | undefined,\n position: number,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n}\n\nexport function assertRequiredField(x: T | undefined,\n field: string,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nexport function convertUnrestrictedDouble(value: unknown): number {\n return Number(value);\n}\n\nfunction censorNegativeZero(x: number): number {\n return x === 0 ? 0 : x;\n}\n\nfunction integerPart(x: number): number {\n return censorNegativeZero(MathTrunc(x));\n}\n\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nexport function convertUnsignedLongLongWithEnforceRange(value: unknown, context: string): number {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n\n let x = Number(value);\n x = censorNegativeZero(x);\n\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n\n x = integerPart(x);\n\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n\n return x;\n}\n","import { IsReadableStream, ReadableStream } from '../readable-stream';\n\nexport function assertReadableStream(x: unknown, context: string): asserts x is ReadableStream {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, ReadableStream } from '../readable-stream';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { PullSteps } from '../abstract-ops/internal-methods';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\n\n/**\n * A result returned by {@link ReadableStreamDefaultReader.read}.\n *\n * @public\n */\nexport type ReadableStreamDefaultReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value?: undefined;\n}\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamDefaultReader(stream: ReadableStream): ReadableStreamDefaultReader {\n return new ReadableStreamDefaultReader(stream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadRequest(stream: ReadableStream,\n readRequest: ReadRequest): void {\n assert(IsReadableStreamDefaultReader(stream._reader));\n assert(stream._state === 'readable');\n\n (stream._reader! as ReadableStreamDefaultReader)._readRequests.push(readRequest);\n}\n\nexport function ReadableStreamFulfillReadRequest(stream: ReadableStream, chunk: R | undefined, done: boolean) {\n const reader = stream._reader as ReadableStreamDefaultReader;\n\n assert(reader._readRequests.length > 0);\n\n const readRequest = reader._readRequests.shift()!;\n if (done) {\n readRequest._closeSteps();\n } else {\n readRequest._chunkSteps(chunk!);\n }\n}\n\nexport function ReadableStreamGetNumReadRequests(stream: ReadableStream): number {\n return (stream._reader as ReadableStreamDefaultReader)._readRequests.length;\n}\n\nexport function ReadableStreamHasDefaultReader(stream: ReadableStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadRequest {\n _chunkSteps(chunk: R): void;\n\n _closeSteps(): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamDefaultReader {\n /** @internal */\n _ownerReadableStream!: ReadableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(): Promise> {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamDefaultReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamDefaultReader(x: any): x is ReadableStreamDefaultReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultReader;\n}\n\nexport function ReadableStreamDefaultReaderRead(reader: ReadableStreamDefaultReader,\n readRequest: ReadRequest): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n } else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n } else {\n assert(stream._state === 'readable');\n stream._readableStreamController[PullSteps](readRequest as ReadRequest);\n }\n}\n\nexport function ReadableStreamDefaultReaderRelease(reader: ReadableStreamDefaultReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n}\n\nexport function ReadableStreamDefaultReaderErrorReadRequests(reader: ReadableStreamDefaultReader, e: any) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nfunction defaultReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n","/// \n\n/* eslint-disable @typescript-eslint/no-empty-function */\nexport const AsyncIteratorPrototype: AsyncIterable =\n Object.getPrototypeOf(Object.getPrototypeOf(async function* (): AsyncIterableIterator {}).prototype);\n","/// \n\nimport { ReadableStream } from '../readable-stream';\nimport {\n AcquireReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadableStreamDefaultReadResult,\n type ReadRequest\n} from './default-reader';\nimport { ReadableStreamReaderGenericCancel, ReadableStreamReaderGenericRelease } from './generic-reader';\nimport assert from '../../stub/assert';\nimport { AsyncIteratorPrototype } from '@@target/stub/async-iterator-prototype';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n queueMicrotask,\n transformPromiseWith\n} from '../helpers/webidl';\n\n/**\n * An async iterator returned by {@link ReadableStream.values}.\n *\n * @public\n */\nexport interface ReadableStreamAsyncIterator extends AsyncIterableIterator {\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nexport class ReadableStreamAsyncIteratorImpl {\n private readonly _reader: ReadableStreamDefaultReader;\n private readonly _preventCancel: boolean;\n private _ongoingPromise: Promise> | undefined = undefined;\n private _isFinished = false;\n\n constructor(reader: ReadableStreamDefaultReader, preventCancel: boolean) {\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n\n next(): Promise> {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n\n return(value: any): Promise> {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n\n private _nextSteps(): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n\n private _returnSteps(value: any): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n assert(reader._readRequests.length === 0);\n\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n}\n\ninterface ReadableStreamAsyncIteratorInstance extends ReadableStreamAsyncIterator {\n /** @interal */\n _asyncIteratorImpl: ReadableStreamAsyncIteratorImpl;\n\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nconst ReadableStreamAsyncIteratorPrototype: ReadableStreamAsyncIteratorInstance = {\n next(this: ReadableStreamAsyncIteratorInstance): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n\n return(this: ReadableStreamAsyncIteratorInstance, value: any): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n} as any;\nObject.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamAsyncIterator(stream: ReadableStream,\n preventCancel: boolean): ReadableStreamAsyncIterator {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator: ReadableStreamAsyncIteratorInstance = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n}\n\nfunction IsReadableStreamAsyncIterator(x: any): x is ReadableStreamAsyncIterator {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n\n try {\n // noinspection SuspiciousTypeOfGuard\n return (x as ReadableStreamAsyncIteratorInstance)._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n } catch {\n return false;\n }\n}\n\n// Helper functions for the ReadableStream.\n\nfunction streamAsyncIteratorBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN: typeof Number.isNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n};\n\nexport default NumberIsNaN;\n","import { reflectCall } from 'lib/helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport assert from '../../stub/assert';\n\ndeclare global {\n interface ArrayBuffer {\n readonly detached: boolean;\n\n transfer(): ArrayBuffer;\n }\n\n function structuredClone(value: T, options: { transfer: ArrayBuffer[] }): T;\n}\n\nexport function CreateArrayFromList(elements: T): T {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice() as T;\n}\n\nexport function CopyDataBlockBytes(dest: ArrayBuffer,\n destOffset: number,\n src: ArrayBuffer,\n srcOffset: number,\n n: number) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n\nexport let TransferArrayBuffer = (O: ArrayBuffer): ArrayBuffer => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n } else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n } else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n};\n\nexport function CanTransferArrayBuffer(O: ArrayBuffer): boolean {\n return !IsDetachedBuffer(O);\n}\n\nexport let IsDetachedBuffer = (O: ArrayBuffer): boolean => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n } else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n};\n\nexport function ArrayBufferSlice(buffer: ArrayBuffer, begin: number, end: number): ArrayBuffer {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n}\n\nexport type MethodName = {\n [P in keyof T]: T[P] extends Function | undefined ? P : never;\n}[keyof T];\n\nexport function GetMethod>(receiver: T, prop: K): T[K] | undefined {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n}\n\nexport interface SyncIteratorRecord {\n iterator: Iterator,\n nextMethod: Iterator['next'],\n done: boolean;\n}\n\nexport interface AsyncIteratorRecord {\n iterator: AsyncIterator,\n nextMethod: AsyncIterator['next'],\n done: boolean;\n}\n\nexport type SyncOrAsyncIteratorRecord = SyncIteratorRecord | AsyncIteratorRecord;\n\nexport function CreateAsyncFromSyncIterator(syncIteratorRecord: SyncIteratorRecord): AsyncIteratorRecord {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n}\n\n// Aligns with core-js/modules/es.symbol.async-iterator.js\nexport const SymbolAsyncIterator: (typeof Symbol)['asyncIterator'] =\n Symbol.asyncIterator ??\n Symbol.for?.('Symbol.asyncIterator') ??\n '@@asyncIterator';\n\nexport type SyncOrAsyncIterable = Iterable | AsyncIterable;\nexport type SyncOrAsyncIteratorMethod = () => (Iterator | AsyncIterator);\n\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint: 'async',\n method?: SyncOrAsyncIteratorMethod\n): AsyncIteratorRecord;\nfunction GetIterator(\n obj: Iterable,\n hint: 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncIteratorRecord;\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint = 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncOrAsyncIteratorRecord {\n assert(hint === 'sync' || hint === 'async');\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj as AsyncIterable, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj as Iterable, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj as Iterable, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n } else {\n method = GetMethod(obj as Iterable, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false } as SyncOrAsyncIteratorRecord;\n}\n\nexport { GetIterator };\n\nexport function IteratorNext(iteratorRecord: AsyncIteratorRecord): Promise> {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n}\n\nexport function IteratorComplete(\n iterResult: IteratorResult\n): iterResult is IteratorReturnResult {\n assert(typeIsObject(iterResult));\n return Boolean(iterResult.done);\n}\n\nexport function IteratorValue(iterResult: IteratorYieldResult): T {\n assert(typeIsObject(iterResult));\n return iterResult.value;\n}\n","import NumberIsNaN from '../../stub/number-isnan';\nimport { ArrayBufferSlice } from './ecmascript';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function IsNonNegativeNumber(v: number): boolean {\n if (typeof v !== 'number') {\n return false;\n }\n\n if (NumberIsNaN(v)) {\n return false;\n }\n\n if (v < 0) {\n return false;\n }\n\n return true;\n}\n\nexport function CloneAsUint8Array(O: NonShared): NonShared {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer) as NonShared;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsNonNegativeNumber } from './miscellaneous';\n\nexport interface QueueContainer {\n _queue: SimpleQueue;\n _queueTotalSize: number;\n}\n\nexport interface QueuePair {\n value: T;\n size: number;\n}\n\nexport function DequeueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.shift()!;\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n\n return pair.value;\n}\n\nexport function EnqueueValueWithSize(container: QueueContainer>, value: T, size: number) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n}\n\nexport function PeekQueueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.peek();\n return pair.value;\n}\n\nexport function ResetQueue(container: QueueContainer) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n}\n","export type TypedArray =\n | Int8Array\n | Uint8Array\n | Uint8ClampedArray\n | Int16Array\n | Uint16Array\n | Int32Array\n | Uint32Array\n | Float32Array\n | Float64Array;\n\nexport type NonShared = T & {\n buffer: ArrayBuffer;\n}\n\nexport interface ArrayBufferViewConstructor {\n new(buffer: ArrayBuffer, byteOffset: number, length?: number): T;\n\n readonly prototype: T;\n}\n\nexport interface TypedArrayConstructor extends ArrayBufferViewConstructor {\n readonly BYTES_PER_ELEMENT: number;\n}\n\nexport type DataViewConstructor = ArrayBufferViewConstructor;\n\nfunction isDataViewConstructor(ctor: Function): ctor is DataViewConstructor {\n return ctor === DataView;\n}\n\nexport function isDataView(view: ArrayBufferView): view is DataView {\n return isDataViewConstructor(view.constructor);\n}\n\nexport function arrayBufferViewElementSize(ctor: ArrayBufferViewConstructor): number {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return (ctor as unknown as TypedArrayConstructor).BYTES_PER_ELEMENT;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n IsReadableStreamDefaultReader,\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n ReadableStreamHasDefaultReader,\n type ReadRequest\n} from './default-reader';\nimport {\n ReadableStreamAddReadIntoRequest,\n ReadableStreamFulfillReadIntoRequest,\n ReadableStreamGetNumReadIntoRequests,\n ReadableStreamHasBYOBReader,\n type ReadIntoRequest\n} from './byob-reader';\nimport NumberIsInteger from '../../stub/number-isinteger';\nimport {\n IsReadableStreamLocked,\n type ReadableByteStream,\n ReadableStreamClose,\n ReadableStreamError\n} from '../readable-stream';\nimport type { ValidatedUnderlyingByteSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport {\n ArrayBufferSlice,\n CanTransferArrayBuffer,\n CopyDataBlockBytes,\n IsDetachedBuffer,\n TransferArrayBuffer\n} from '../abstract-ops/ecmascript';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\nimport { assertRequiredArgument, convertUnsignedLongLongWithEnforceRange } from '../validators/basic';\nimport {\n type ArrayBufferViewConstructor,\n arrayBufferViewElementSize,\n type NonShared,\n type TypedArrayConstructor\n} from '../helpers/array-buffer-view';\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nexport class ReadableStreamBYOBRequest {\n /** @internal */\n _associatedReadableByteStreamController!: ReadableByteStreamController;\n /** @internal */\n _view!: NonShared | null;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view(): ArrayBufferView | null {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n\n return this._view;\n }\n\n /**\n * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into\n * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer.\n *\n * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer\n * modifiable.\n */\n respond(bytesWritten: number): void;\n respond(bytesWritten: number | undefined): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(this._view!.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n\n assert(this._view!.byteLength > 0);\n assert(this._view!.buffer.byteLength > 0);\n\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n\n /**\n * Indicates to the associated readable byte stream that instead of writing into\n * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`,\n * which will be given to the consumer of the readable byte stream.\n *\n * After this method is called, `view` will be transferred and no longer modifiable.\n */\n respondWithNewView(view: ArrayBufferView): void;\n respondWithNewView(view: NonShared): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n}\n\ninterface ByteQueueElement {\n buffer: ArrayBuffer;\n byteOffset: number;\n byteLength: number;\n}\n\ntype PullIntoDescriptor = NonShared> =\n DefaultPullIntoDescriptor\n | BYOBPullIntoDescriptor;\n\ninterface DefaultPullIntoDescriptor {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: TypedArrayConstructor;\n readerType: 'default' | 'none';\n}\n\ninterface BYOBPullIntoDescriptor = NonShared> {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: ArrayBufferViewConstructor;\n readerType: 'byob' | 'none';\n}\n\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableByteStreamController {\n /** @internal */\n _controlledReadableByteStream!: ReadableByteStream;\n /** @internal */\n _queue!: SimpleQueue;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n /** @internal */\n _autoAllocateChunkSize: number | undefined;\n /** @internal */\n _byobRequest: ReadableStreamBYOBRequest | null;\n /** @internal */\n _pendingPullIntos!: SimpleQueue;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest(): ReadableStreamBYOBRequest | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n\n ReadableByteStreamControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk chunk in the controlled readable stream.\n * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown.\n */\n enqueue(chunk: ArrayBufferView): void;\n enqueue(chunk: NonShared): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n\n ReadableByteStreamControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n\n ResetQueue(this);\n\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest>): void {\n const stream = this._controlledReadableByteStream;\n assert(ReadableStreamHasDefaultReader(stream));\n\n if (this._queueTotalSize > 0) {\n assert(ReadableStreamGetNumReadRequests(stream) === 0);\n\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer: ArrayBuffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n } catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n\n const pullIntoDescriptor: DefaultPullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n}\n\nObject.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableByteStreamController.prototype.close, 'close');\nsetFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableByteStreamController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableByteStreamController.\n\nexport function IsReadableByteStreamController(x: any): x is ReadableByteStreamController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n\n return x instanceof ReadableByteStreamController;\n}\n\nfunction IsReadableStreamBYOBRequest(x: any): x is ReadableStreamBYOBRequest {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBRequest;\n}\n\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller: ReadableByteStreamController): void {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller: ReadableByteStreamController) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n}\n\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor>(\n stream: ReadableByteStream,\n pullIntoDescriptor: PullIntoDescriptor\n) {\n assert(stream._state !== 'errored');\n assert(pullIntoDescriptor.readerType !== 'none');\n\n let done = false;\n if (stream._state === 'closed') {\n assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);\n done = true;\n }\n\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView as unknown as NonShared, done);\n } else {\n assert(pullIntoDescriptor.readerType === 'byob');\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n}\n\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor>(\n pullIntoDescriptor: PullIntoDescriptor\n): T {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n\n assert(bytesFilled <= pullIntoDescriptor.byteLength);\n assert(bytesFilled % elementSize === 0);\n\n return new pullIntoDescriptor.viewConstructor(\n pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize) as T;\n}\n\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n}\n\nfunction ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n } catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n}\n\nfunction ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.readerType === 'none');\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n firstDescriptor.buffer,\n firstDescriptor.byteOffset,\n firstDescriptor.bytesFilled\n );\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n}\n\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller: ReadableByteStreamController,\n pullIntoDescriptor: PullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize,\n pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n\n const queue = controller._queue;\n\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n } else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n\n if (!ready) {\n assert(controller._queueTotalSize === 0);\n assert(pullIntoDescriptor.bytesFilled > 0);\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n }\n\n return ready;\n}\n\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller: ReadableByteStreamController,\n size: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);\n assert(controller._byobRequest === null);\n pullIntoDescriptor.bytesFilled += size;\n}\n\nfunction ReadableByteStreamControllerHandleQueueDrain(controller: ReadableByteStreamController) {\n assert(controller._controlledReadableByteStream._state === 'readable');\n\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n } else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n}\n\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller: ReadableByteStreamController) {\n if (controller._byobRequest === null) {\n return;\n }\n\n controller._byobRequest._associatedReadableByteStreamController = undefined!;\n controller._byobRequest._view = null!;\n controller._byobRequest = null;\n}\n\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller: ReadableByteStreamController) {\n assert(!controller._closeRequested);\n\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n assert(pullIntoDescriptor.readerType !== 'none');\n\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n ReadableByteStreamControllerCommitPullIntoDescriptor(\n controller._controlledReadableByteStream,\n pullIntoDescriptor\n );\n }\n }\n}\n\nfunction ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller: ReadableByteStreamController) {\n const reader = controller._controlledReadableByteStream._reader;\n assert(IsReadableStreamDefaultReader(reader));\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n}\n\nexport function ReadableByteStreamControllerPullInto>(\n controller: ReadableByteStreamController,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = controller._controlledReadableByteStream;\n\n const ctor = view.constructor as ArrayBufferViewConstructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n\n const { byteOffset, byteLength } = view;\n\n const minimumFill = min * elementSize;\n assert(minimumFill >= elementSize && minimumFill <= byteLength);\n assert(minimumFill % elementSize === 0);\n\n let buffer: ArrayBuffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n } catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n\n const pullIntoDescriptor: BYOBPullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInClosedState(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.bytesFilled % firstDescriptor.elementSize === 0);\n\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n}\n\nfunction ReadableByteStreamControllerRespondInReadableState(controller: ReadableByteStreamController,\n bytesWritten: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n pullIntoDescriptor.buffer,\n end - remainderSize,\n remainderSize\n );\n }\n\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInternal(controller: ReadableByteStreamController, bytesWritten: number) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n assert(CanTransferArrayBuffer(firstDescriptor.buffer));\n\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n assert(bytesWritten === 0);\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n } else {\n assert(state === 'readable');\n assert(bytesWritten > 0);\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerShiftPendingPullInto(\n controller: ReadableByteStreamController\n): PullIntoDescriptor {\n assert(controller._byobRequest === null);\n const descriptor = controller._pendingPullIntos.shift()!;\n return descriptor;\n}\n\nfunction ReadableByteStreamControllerShouldCallPull(controller: ReadableByteStreamController): boolean {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return false;\n }\n\n if (controller._closeRequested) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableByteStreamControllerClearAlgorithms(controller: ReadableByteStreamController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\n\nexport function ReadableByteStreamControllerClose(controller: ReadableByteStreamController) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n\n return;\n }\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n throw e;\n }\n }\n\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n}\n\nexport function ReadableByteStreamControllerEnqueue(\n controller: ReadableByteStreamController,\n chunk: NonShared\n) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError(\n 'The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk'\n );\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n assert(controller._pendingPullIntos.length === 0);\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n } else {\n assert(controller._queue.length === 0);\n if (controller._pendingPullIntos.length > 0) {\n assert(controller._pendingPullIntos.peek().readerType === 'default');\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView as NonShared, false);\n }\n } else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n } else {\n assert(!IsReadableStreamLocked(stream));\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableByteStreamControllerError(controller: ReadableByteStreamController, e: any) {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableByteStreamControllerFillReadRequestFromQueue(\n controller: ReadableByteStreamController,\n readRequest: ReadRequest>\n) {\n assert(controller._queueTotalSize > 0);\n\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view as NonShared);\n}\n\nexport function ReadableByteStreamControllerGetBYOBRequest(\n controller: ReadableByteStreamController\n): ReadableStreamBYOBRequest | null {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer,\n firstDescriptor.byteOffset + firstDescriptor.bytesFilled,\n firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n\n const byobRequest: ReadableStreamBYOBRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view as NonShared);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n}\n\nfunction ReadableByteStreamControllerGetDesiredSize(controller: ReadableByteStreamController): number | null {\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nexport function ReadableByteStreamControllerRespond(controller: ReadableByteStreamController, bytesWritten: number) {\n assert(controller._pendingPullIntos.length > 0);\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n}\n\nexport function ReadableByteStreamControllerRespondWithNewView(controller: ReadableByteStreamController,\n view: NonShared) {\n assert(controller._pendingPullIntos.length > 0);\n assert(!IsDetachedBuffer(view.buffer));\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (view.byteLength === 0) {\n throw new TypeError(\n 'The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'\n );\n }\n }\n\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n}\n\nexport function SetUpReadableByteStreamController(stream: ReadableByteStream,\n controller: ReadableByteStreamController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n autoAllocateChunkSize: number | undefined) {\n assert(stream._readableStreamController === undefined);\n if (autoAllocateChunkSize !== undefined) {\n assert(NumberIsInteger(autoAllocateChunkSize));\n assert(autoAllocateChunkSize > 0);\n }\n\n controller._controlledReadableByteStream = stream;\n\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._byobRequest = null;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._closeRequested = false;\n controller._started = false;\n\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n\n controller._pendingPullIntos = new SimpleQueue();\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableByteStreamControllerFromUnderlyingSource(\n stream: ReadableByteStream,\n underlyingByteSource: ValidatedUnderlyingByteSource,\n highWaterMark: number\n) {\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n\n SetUpReadableByteStreamController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize\n );\n}\n\nfunction SetUpReadableStreamBYOBRequest(request: ReadableStreamBYOBRequest,\n controller: ReadableByteStreamController,\n view: NonShared) {\n assert(IsReadableByteStreamController(controller));\n assert(typeof view === 'object');\n assert(ArrayBuffer.isView(view));\n assert(!IsDetachedBuffer(view.buffer));\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n}\n\n// Helper functions for the ReadableStreamBYOBRequest.\n\nfunction byobRequestBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n}\n\n// Helper functions for the ReadableByteStreamController.\n\nfunction byteStreamControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, type ReadableByteStream, type ReadableStream } from '../readable-stream';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamController,\n ReadableByteStreamControllerPullInto\n} from './byte-stream-controller';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\nimport { IsDetachedBuffer } from '../abstract-ops/ecmascript';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from './reader-options';\nimport { convertByobReadOptions } from '../validators/reader-options';\nimport { isDataView, type NonShared, type TypedArray } from '../helpers/array-buffer-view';\n\n/**\n * A result returned by {@link ReadableStreamBYOBReader.read}.\n *\n * @public\n */\nexport type ReadableStreamBYOBReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value: T | undefined;\n};\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamBYOBReader(stream: ReadableByteStream): ReadableStreamBYOBReader {\n return new ReadableStreamBYOBReader(stream as ReadableStream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadIntoRequest>(\n stream: ReadableByteStream,\n readIntoRequest: ReadIntoRequest\n): void {\n assert(IsReadableStreamBYOBReader(stream._reader));\n assert(stream._state === 'readable' || stream._state === 'closed');\n\n (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);\n}\n\nexport function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,\n chunk: ArrayBufferView,\n done: boolean) {\n const reader = stream._reader as ReadableStreamBYOBReader;\n\n assert(reader._readIntoRequests.length > 0);\n\n const readIntoRequest = reader._readIntoRequests.shift()!;\n if (done) {\n readIntoRequest._closeSteps(chunk);\n } else {\n readIntoRequest._chunkSteps(chunk);\n }\n}\n\nexport function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {\n return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;\n}\n\nexport function ReadableStreamHasBYOBReader(stream: ReadableByteStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadIntoRequest> {\n _chunkSteps(chunk: T): void;\n\n _closeSteps(chunk: T | undefined): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamBYOBReader {\n /** @internal */\n _ownerReadableStream!: ReadableByteStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readIntoRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readIntoRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Attempts to reads bytes into view, and returns a promise resolved with the result.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(\n view: T,\n options?: ReadableStreamBYOBReaderReadOptions\n ): Promise>;\n read>(\n view: T,\n rawOptions: ReadableStreamBYOBReaderReadOptions | null | undefined = {}\n ): Promise> {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n\n let options: ValidatedReadableStreamBYOBReaderReadOptions;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > (view as unknown as TypedArray).length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n } else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamBYOBReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest: ReadIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamBYOBReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBReader;\n}\n\nexport function ReadableStreamBYOBReaderRead>(\n reader: ReadableStreamBYOBReader,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n } else {\n ReadableByteStreamControllerPullInto(\n stream._readableStreamController as ReadableByteStreamController,\n view,\n min,\n readIntoRequest\n );\n }\n}\n\nexport function ReadableStreamBYOBReaderRelease(reader: ReadableStreamBYOBReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n}\n\nexport function ReadableStreamBYOBReaderErrorReadIntoRequests(reader: ReadableStreamBYOBReader, e: any) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamBYOBReader.\n\nfunction byobReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n}\n","import { assertDictionary, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from '../readable-stream/reader-options';\n\nexport function convertReaderOptions(options: ReadableStreamGetReaderOptions | null | undefined,\n context: string): ReadableStreamGetReaderOptions {\n assertDictionary(options, context);\n const mode = options?.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n}\n\nfunction convertReadableStreamReaderMode(mode: string, context: string): 'byob' {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n}\n\nexport function convertByobReadOptions(\n options: ReadableStreamBYOBReaderReadOptions | null | undefined,\n context: string\n): ValidatedReadableStreamBYOBReaderReadOptions {\n assertDictionary(options, context);\n const min = options?.min ?? 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(\n min,\n `${context} has member 'min' that`\n )\n };\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport NumberIsNaN from '../../stub/number-isnan';\n\nexport function ExtractHighWaterMark(strategy: QueuingStrategy, defaultHWM: number): number {\n const { highWaterMark } = strategy;\n\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n\n return highWaterMark;\n}\n\nexport function ExtractSizeAlgorithm(strategy: QueuingStrategy): QueuingStrategySizeCallback {\n const { size } = strategy;\n\n if (!size) {\n return () => 1;\n }\n\n return size;\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport { assertDictionary, assertFunction, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategy(init: QueuingStrategy | null | undefined,\n context: string): QueuingStrategy {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n const size = init?.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n}\n\nfunction convertQueuingStrategySize(fn: QueuingStrategySizeCallback,\n context: string): QueuingStrategySizeCallback {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from '../writable-stream/underlying-sink';\nimport { WritableStreamDefaultController } from '../writable-stream';\n\nexport function convertUnderlyingSink(original: UnderlyingSink | null,\n context: string): ValidatedUnderlyingSink {\n assertDictionary(original, context);\n const abort = original?.abort;\n const close = original?.close;\n const start = original?.start;\n const type = original?.type;\n const write = original?.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original!, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original!, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original!, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original!, `${context} has member 'write' that`),\n type\n };\n}\n\nfunction convertUnderlyingSinkAbortCallback(\n fn: UnderlyingSinkAbortCallback,\n original: UnderlyingSink,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSinkCloseCallback(\n fn: UnderlyingSinkCloseCallback,\n original: UnderlyingSink,\n context: string\n): () => Promise {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n}\n\nfunction convertUnderlyingSinkStartCallback(\n fn: UnderlyingSinkStartCallback,\n original: UnderlyingSink,\n context: string\n): UnderlyingSinkStartCallback {\n assertFunction(fn, context);\n return (controller: WritableStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSinkWriteCallback(\n fn: UnderlyingSinkWriteCallback,\n original: UnderlyingSink,\n context: string\n): (chunk: W, controller: WritableStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: W, controller: WritableStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n","import { IsWritableStream, WritableStream } from '../writable-stream';\n\nexport function assertWritableStream(x: unknown, context: string): asserts x is WritableStream {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n}\n","/**\n * A signal object that allows you to communicate with a request and abort it if required\n * via its associated `AbortController` object.\n *\n * @remarks\n * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @public\n */\nexport interface AbortSignal {\n /**\n * Whether the request is aborted.\n */\n readonly aborted: boolean;\n\n /**\n * If aborted, returns the reason for aborting.\n */\n readonly reason?: any;\n\n /**\n * Add an event listener to be triggered when this signal becomes aborted.\n */\n addEventListener(type: 'abort', listener: () => void): void;\n\n /**\n * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}.\n */\n removeEventListener(type: 'abort', listener: () => void): void;\n}\n\nexport function isAbortSignal(value: unknown): value is AbortSignal {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof (value as AbortSignal).aborted === 'boolean';\n } catch {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n}\n\n/**\n * A controller object that allows you to abort an `AbortSignal` when desired.\n *\n * @remarks\n * This interface is compatible with the `AbortController` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @internal\n */\nexport interface AbortController {\n readonly signal: AbortSignal;\n\n abort(reason?: any): void;\n}\n\ninterface AbortControllerConstructor {\n new(): AbortController;\n}\n\nconst supportsAbortController = typeof (AbortController as any) === 'function';\n\n/**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\nexport function createAbortController(): AbortController | undefined {\n if (supportsAbortController) {\n return new (AbortController as AbortControllerConstructor)();\n }\n return undefined;\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponPromise\n} from './helpers/webidl';\nimport {\n DequeueValue,\n EnqueueValueWithSize,\n PeekQueueValue,\n type QueuePair,\n ResetQueue\n} from './abstract-ops/queue-with-sizes';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { SimpleQueue } from './simple-queue';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { AbortSteps, ErrorSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from './writable-stream/underlying-sink';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertUnderlyingSink } from './validators/underlying-sink';\nimport { assertWritableStream } from './validators/writable-stream';\nimport { type AbortController, type AbortSignal, createAbortController } from './abort-signal';\n\ntype WritableStreamState = 'writable' | 'closed' | 'erroring' | 'errored';\n\ninterface WriteOrCloseRequest {\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n}\n\ntype WriteRequest = WriteOrCloseRequest;\ntype CloseRequest = WriteOrCloseRequest;\n\ninterface PendingAbortRequest {\n _promise: Promise;\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n _reason: any;\n _wasAlreadyErroring: boolean;\n}\n\n/**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\nclass WritableStream {\n /** @internal */\n _state!: WritableStreamState;\n /** @internal */\n _storedError: any;\n /** @internal */\n _writer: WritableStreamDefaultWriter | undefined;\n /** @internal */\n _writableStreamController!: WritableStreamDefaultController;\n /** @internal */\n _writeRequests!: SimpleQueue;\n /** @internal */\n _inFlightWriteRequest: WriteRequest | undefined;\n /** @internal */\n _closeRequest: CloseRequest | undefined;\n /** @internal */\n _inFlightCloseRequest: CloseRequest | undefined;\n /** @internal */\n _pendingAbortRequest: PendingAbortRequest | undefined;\n /** @internal */\n _backpressure!: boolean;\n\n constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSink: UnderlyingSink | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n } else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n\n InitializeWritableStream(this);\n\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked(): boolean {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsWritableStreamLocked(this);\n }\n\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('abort'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n\n return WritableStreamAbort(this, reason);\n }\n\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('close'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamClose(this);\n }\n\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter(): WritableStreamDefaultWriter {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('getWriter');\n }\n\n return AcquireWritableStreamDefaultWriter(this);\n }\n}\n\nObject.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(WritableStream.prototype.abort, 'abort');\nsetFunctionName(WritableStream.prototype.close, 'close');\nsetFunctionName(WritableStream.prototype.getWriter, 'getWriter');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n}\n\nexport {\n AcquireWritableStreamDefaultWriter,\n CreateWritableStream,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamDefaultControllerErrorIfNeeded,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite,\n WritableStreamCloseQueuedOrInFlight\n};\n\nexport type {\n UnderlyingSink,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkAbortCallback\n};\n\n// Abstract operations for the WritableStream.\n\nfunction AcquireWritableStreamDefaultWriter(stream: WritableStream): WritableStreamDefaultWriter {\n return new WritableStreamDefaultWriter(stream);\n}\n\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: WritableStream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n\n const controller: WritableStreamDefaultController = Object.create(WritableStreamDefaultController.prototype);\n\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm,\n abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n}\n\nfunction InitializeWritableStream(stream: WritableStream) {\n stream._state = 'writable';\n\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n\n stream._writer = undefined;\n\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined!;\n\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n}\n\nfunction IsWritableStream(x: unknown): x is WritableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n\n return x instanceof WritableStream;\n}\n\nfunction IsWritableStreamLocked(stream: WritableStream): boolean {\n assert(IsWritableStream(stream));\n\n if (stream._writer === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamAbort(stream: WritableStream, reason: any): Promise {\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n stream._writableStreamController._abortController?.abort(reason);\n\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state as WritableStreamState;\n\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined!,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest!._promise = promise;\n\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n\n return promise;\n}\n\nfunction WritableStreamClose(stream: WritableStream): Promise {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(\n `The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n\n assert(state === 'writable' || state === 'erroring');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const promise = newPromise((resolve, reject) => {\n const closeRequest: CloseRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._closeRequest = closeRequest;\n });\n\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n\n return promise;\n}\n\n// WritableStream API exposed for controllers.\n\nfunction WritableStreamAddWriteRequest(stream: WritableStream): Promise {\n assert(IsWritableStreamLocked(stream));\n assert(stream._state === 'writable');\n\n const promise = newPromise((resolve, reject) => {\n const writeRequest: WriteRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._writeRequests.push(writeRequest);\n });\n\n return promise;\n}\n\nfunction WritableStreamDealWithRejection(stream: WritableStream, error: any) {\n const state = stream._state;\n\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n\n assert(state === 'erroring');\n WritableStreamFinishErroring(stream);\n}\n\nfunction WritableStreamStartErroring(stream: WritableStream, reason: any) {\n assert(stream._storedError === undefined);\n assert(stream._state === 'writable');\n\n const controller = stream._writableStreamController;\n assert(controller !== undefined);\n\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n}\n\nfunction WritableStreamFinishErroring(stream: WritableStream) {\n assert(stream._state === 'erroring');\n assert(!WritableStreamHasOperationMarkedInFlight(stream));\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(\n promise,\n () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n },\n (reason: any) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n}\n\nfunction WritableStreamFinishInFlightWrite(stream: WritableStream) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n}\n\nfunction WritableStreamFinishInFlightWriteWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._reject(error);\n stream._inFlightWriteRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n WritableStreamDealWithRejection(stream, error);\n}\n\nfunction WritableStreamFinishInFlightClose(stream: WritableStream) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n\n const state = stream._state;\n\n assert(state === 'writable' || state === 'erroring');\n\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n\n stream._state = 'closed';\n\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n\n assert(stream._pendingAbortRequest === undefined);\n assert(stream._storedError === undefined);\n}\n\nfunction WritableStreamFinishInFlightCloseWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._reject(error);\n stream._inFlightCloseRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n}\n\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream: WritableStream): boolean {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamHasOperationMarkedInFlight(stream: WritableStream): boolean {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamMarkCloseRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightCloseRequest === undefined);\n assert(stream._closeRequest !== undefined);\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n}\n\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightWriteRequest === undefined);\n assert(stream._writeRequests.length !== 0);\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\n\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream: WritableStream) {\n assert(stream._state === 'errored');\n if (stream._closeRequest !== undefined) {\n assert(stream._inFlightCloseRequest === undefined);\n\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n}\n\nfunction WritableStreamUpdateBackpressure(stream: WritableStream, backpressure: boolean) {\n assert(stream._state === 'writable');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n } else {\n assert(!backpressure);\n\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n\n stream._backpressure = backpressure;\n}\n\n/**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\nexport class WritableStreamDefaultWriter {\n /** @internal */\n _ownerWritableStream: WritableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _closedPromiseState!: 'pending' | 'resolved' | 'rejected';\n /** @internal */\n _readyPromise!: Promise;\n /** @internal */\n _readyPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _readyPromise_reject?: (reason: any) => void;\n /** @internal */\n _readyPromiseState!: 'pending' | 'fulfilled' | 'rejected';\n\n constructor(stream: WritableStream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n\n this._ownerWritableStream = stream;\n stream._writer = this;\n\n const state = stream._state;\n\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n } else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n } else {\n assert(state === 'errored');\n\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize(): number | null {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n\n return this._readyPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamDefaultWriterClose(this);\n }\n\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock(): void {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return;\n }\n\n assert(stream._writer !== undefined);\n\n WritableStreamDefaultWriterRelease(this);\n }\n\n /**\n * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully,\n * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return\n * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes\n * errored before the writing process is initiated.\n *\n * Note that what \"success\" means is up to the underlying sink; it might indicate simply that the chunk has been\n * accepted, and not necessarily that it is safely saved to its ultimate destination.\n */\n write(chunk: W): Promise;\n write(chunk: W = undefined!): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n});\nsetFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\nsetFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\nsetFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\nsetFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n}\n\n// Abstract operations for the WritableStreamDefaultWriter.\n\nfunction IsWritableStreamDefaultWriter(x: any): x is WritableStreamDefaultWriter {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultWriter;\n}\n\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultWriterAbort(writer: WritableStreamDefaultWriter, reason: any) {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamAbort(stream, reason);\n}\n\nfunction WritableStreamDefaultWriterClose(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamClose(stream);\n}\n\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n return WritableStreamDefaultWriterClose(writer);\n}\n\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n } else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n } else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterGetDesiredSize(writer: WritableStreamDefaultWriter): number | null {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n\n if (state === 'closed') {\n return 0;\n }\n\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\n\nfunction WritableStreamDefaultWriterRelease(writer: WritableStreamDefaultWriter) {\n const stream = writer._ownerWritableStream;\n assert(stream !== undefined);\n assert(stream._writer === writer);\n\n const releasedError = new TypeError(\n `Writer was released and can no longer be used to monitor the stream's closedness`);\n\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n\n stream._writer = undefined;\n writer._ownerWritableStream = undefined!;\n}\n\nfunction WritableStreamDefaultWriterWrite(writer: WritableStreamDefaultWriter, chunk: W): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const controller = stream._writableStreamController;\n\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable');\n\n const promise = WritableStreamAddWriteRequest(stream);\n\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n\n return promise;\n}\n\nconst closeSentinel: unique symbol = {} as any;\n\ntype QueueRecord = W | typeof closeSentinel;\n\n/**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\nexport class WritableStreamDefaultController {\n /** @internal */\n _controlledWritableStream!: WritableStream;\n /** @internal */\n _queue!: SimpleQueue>>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _abortReason: any;\n /** @internal */\n _abortController: AbortController | undefined;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _writeAlgorithm!: (chunk: W) => Promise;\n /** @internal */\n _closeAlgorithm!: () => Promise;\n /** @internal */\n _abortAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason(): any {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('abortReason');\n }\n return this._abortReason;\n }\n\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal(): AbortSignal {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e: any = undefined): void {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n\n WritableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [AbortSteps](reason: any): Promise {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations implementing interface required by the WritableStream.\n\nfunction IsWritableStreamDefaultController(x: any): x is WritableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultController;\n}\n\nfunction SetUpWritableStreamDefaultController(stream: WritableStream,\n controller: WritableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(IsWritableStream(stream));\n assert(stream._writableStreamController === undefined);\n\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(\n startPromise,\n () => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n r => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n }\n );\n}\n\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream: WritableStream,\n underlyingSink: ValidatedUnderlyingSink,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let writeAlgorithm: (chunk: W) => Promise;\n let closeAlgorithm: () => Promise;\n let abortAlgorithm: (reason: any) => Promise;\n\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write!(chunk, controller);\n } else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close!();\n } else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort!(reason);\n } else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpWritableStreamDefaultController(\n stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\nfunction WritableStreamDefaultControllerClearAlgorithms(controller: WritableStreamDefaultController) {\n controller._writeAlgorithm = undefined!;\n controller._closeAlgorithm = undefined!;\n controller._abortAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\nfunction WritableStreamDefaultControllerClose(controller: WritableStreamDefaultController) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\nfunction WritableStreamDefaultControllerGetChunkSize(controller: WritableStreamDefaultController,\n chunk: W): number {\n try {\n return controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n}\n\nfunction WritableStreamDefaultControllerGetDesiredSize(controller: WritableStreamDefaultController): number {\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nfunction WritableStreamDefaultControllerWrite(controller: WritableStreamDefaultController,\n chunk: W,\n chunkSize: number) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\n// Abstract operations for the WritableStreamDefaultController.\n\nfunction WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n if (!controller._started) {\n return;\n }\n\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n\n const state = stream._state;\n assert(state !== 'closed' && state !== 'errored');\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n\n if (controller._queue.length === 0) {\n return;\n }\n\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n } else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n}\n\nfunction WritableStreamDefaultControllerErrorIfNeeded(controller: WritableStreamDefaultController, error: any) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n}\n\nfunction WritableStreamDefaultControllerProcessClose(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkCloseRequestInFlight(stream);\n\n DequeueValue(controller);\n assert(controller._queue.length === 0);\n\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(\n sinkClosePromise,\n () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n },\n reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerProcessWrite(controller: WritableStreamDefaultController, chunk: W) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(\n sinkWritePromise,\n () => {\n WritableStreamFinishInFlightWrite(stream);\n\n const state = stream._state;\n assert(state === 'writable' || state === 'erroring');\n\n DequeueValue(controller);\n\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerGetBackpressure(controller: WritableStreamDefaultController): boolean {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n}\n\n// A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultControllerError(controller: WritableStreamDefaultController, error: any) {\n const stream = controller._controlledWritableStream;\n\n assert(stream._state === 'writable');\n\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n}\n\n// Helper functions for the WritableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n}\n\n// Helper functions for the WritableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n}\n\n\n// Helper functions for the WritableStreamDefaultWriter.\n\nfunction defaultWriterBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n}\n\nfunction defaultWriterLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n}\n\nfunction defaultWriterClosedPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n}\n\nfunction defaultWriterClosedPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n}\n\nfunction defaultWriterClosedPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n}\n\nfunction defaultWriterClosedPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._closedPromise_resolve === undefined);\n assert(writer._closedPromise_reject === undefined);\n assert(writer._closedPromiseState !== 'pending');\n\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n}\n\nfunction defaultWriterReadyPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n}\n\nfunction defaultWriterReadyPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n}\n\nfunction defaultWriterReadyPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n}\n\nfunction defaultWriterReadyPromiseReset(writer: WritableStreamDefaultWriter) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitialize(writer);\n}\n\nfunction defaultWriterReadyPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n}\n","/// \n\nfunction getGlobals(): typeof globalThis | undefined {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n } else if (typeof self !== 'undefined') {\n return self;\n } else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n}\n\nexport const globals = getGlobals();\n","/// \nimport { globals } from '../globals';\nimport { setFunctionName } from '../lib/helpers/miscellaneous';\n\ninterface DOMException extends Error {\n name: string;\n message: string;\n}\n\ntype DOMExceptionConstructor = new (message?: string, name?: string) => DOMException;\n\nfunction isDOMExceptionConstructor(ctor: unknown): ctor is DOMExceptionConstructor {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if ((ctor as DOMExceptionConstructor).name !== 'DOMException') {\n return false;\n }\n try {\n new (ctor as DOMExceptionConstructor)();\n return true;\n } catch {\n return false;\n }\n}\n\n/**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\nfunction getFromGlobal(): DOMExceptionConstructor | undefined {\n const ctor = globals?.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n}\n\n/**\n * Support:\n * - All platforms\n */\nfunction createPolyfill(): DOMExceptionConstructor {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(this: DOMException, message?: string, name?: string) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n } as any;\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-redeclare\nconst DOMException: DOMExceptionConstructor = getFromGlobal() || createPolyfill();\n\nexport { DOMException };\n","import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';\nimport { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireWritableStreamDefaultWriter,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamCloseQueuedOrInFlight,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite\n} from '../writable-stream';\nimport assert from '../../stub/assert';\nimport {\n newPromise,\n PerformPromiseThen,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponFulfillment,\n uponPromise,\n uponRejection\n} from '../helpers/webidl';\nimport { noop } from '../../utils';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\nimport { DOMException } from '../../stub/dom-exception';\n\nexport function ReadableStreamPipeTo(source: ReadableStream,\n dest: WritableStream,\n preventClose: boolean,\n preventAbort: boolean,\n preventCancel: boolean,\n signal: AbortSignal | undefined): Promise {\n assert(IsReadableStream(source));\n assert(IsWritableStream(dest));\n assert(typeof preventClose === 'boolean');\n assert(typeof preventAbort === 'boolean');\n assert(typeof preventCancel === 'boolean');\n assert(signal === undefined || isAbortSignal(signal));\n assert(!IsReadableStreamLocked(source));\n assert(!IsWritableStreamLocked(dest));\n\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n\n source._disturbed = true;\n\n let shuttingDown = false;\n\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n\n return newPromise((resolve, reject) => {\n let abortAlgorithm: () => void;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions: Array<() => Promise> = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n\n signal.addEventListener('abort', abortAlgorithm);\n }\n\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done: boolean) {\n if (done) {\n resolveLoop();\n } else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n\n next(false);\n });\n }\n\n function pipeStep(): Promise {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(\n reader,\n {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n }\n );\n });\n });\n }\n\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n } else {\n shutdown();\n }\n return null;\n });\n\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n } else {\n shutdown(true, destClosed);\n }\n }\n\n setPromiseIsHandledToTrue(pipeLoop());\n\n function waitForWritesToFinish(): Promise {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(\n currentWrite,\n () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined\n );\n }\n\n function isOrBecomesErrored(stream: ReadableStream | WritableStream,\n promise: Promise,\n action: (reason: any) => null) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n } else {\n uponRejection(promise, action);\n }\n }\n\n function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise, action: () => null) {\n if (stream._state === 'closed') {\n action();\n } else {\n uponFulfillment(promise, action);\n }\n }\n\n function shutdownWithAction(action: () => Promise, originalIsError?: boolean, originalError?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n } else {\n doTheRest();\n }\n\n function doTheRest(): null {\n uponPromise(\n action(),\n () => finalize(originalIsError, originalError),\n newError => finalize(true, newError)\n );\n return null;\n }\n }\n\n function shutdown(isError?: boolean, error?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n } else {\n finalize(isError, error);\n }\n }\n\n function finalize(isError?: boolean, error?: any): null {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n } else {\n resolve(undefined);\n }\n\n return null;\n }\n });\n}\n","import type { QueuingStrategySizeCallback } from '../queuing-strategy';\nimport assert from '../../stub/assert';\nimport { DequeueValue, EnqueueValueWithSize, type QueuePair, ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n type ReadRequest\n} from './default-reader';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsReadableStreamLocked, ReadableStream, ReadableStreamClose, ReadableStreamError } from '../readable-stream';\nimport type { ValidatedUnderlyingSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\n\n/**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableStreamDefaultController {\n /** @internal */\n _controlledReadableStream!: ReadableStream;\n /** @internal */\n _queue!: SimpleQueue>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('close');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n\n ReadableStreamDefaultControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the controlled readable stream.\n */\n enqueue(chunk: R): void;\n enqueue(chunk: R = undefined!): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n ReadableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest): void {\n const stream = this._controlledReadableStream;\n\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n } else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n\n readRequest._chunkSteps(chunk);\n } else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n // Do nothing.\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\nsetFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableStreamDefaultController.\n\nfunction IsReadableStreamDefaultController(x: any): x is ReadableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultController;\n}\n\nfunction ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController): void {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController): boolean {\n const stream = controller._controlledReadableStream;\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\n// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n\nexport function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n controller._closeRequested = true;\n\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n}\n\nexport function ReadableStreamDefaultControllerEnqueue(\n controller: ReadableStreamDefaultController,\n chunk: R\n): void {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n } else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController, e: any) {\n const stream = controller._controlledReadableStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ResetQueue(controller);\n\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableStreamDefaultControllerGetDesiredSize(\n controller: ReadableStreamDefaultController\n): number | null {\n const state = controller._controlledReadableStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\n// This is used in the implementation of TransformStream.\nexport function ReadableStreamDefaultControllerHasBackpressure(\n controller: ReadableStreamDefaultController\n): boolean {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n\n return true;\n}\n\nexport function ReadableStreamDefaultControllerCanCloseOrEnqueue(\n controller: ReadableStreamDefaultController\n): boolean {\n const state = controller._controlledReadableStream._state;\n\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n\n return false;\n}\n\nexport function SetUpReadableStreamDefaultController(stream: ReadableStream,\n controller: ReadableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(stream._readableStreamController === undefined);\n\n controller._controlledReadableStream = stream;\n\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n stream: ReadableStream,\n underlyingSource: ValidatedUnderlyingSource,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback\n) {\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// Helper functions for the ReadableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n}\n","import {\n CreateReadableByteStream,\n CreateReadableStream,\n type DefaultReadableStream,\n IsReadableStream,\n type ReadableByteStream,\n ReadableStream,\n ReadableStreamCancel,\n type ReadableStreamReader\n} from '../readable-stream';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadRequest\n} from './default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReaderRead,\n type ReadIntoRequest\n} from './byob-reader';\nimport assert from '../../stub/assert';\nimport { newPromise, promiseResolvedWith, queueMicrotask, uponRejection } from '../helpers/webidl';\nimport {\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError\n} from './default-controller';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamControllerClose,\n ReadableByteStreamControllerEnqueue,\n ReadableByteStreamControllerError,\n ReadableByteStreamControllerGetBYOBRequest,\n ReadableByteStreamControllerRespond,\n ReadableByteStreamControllerRespondWithNewView\n} from './byte-stream-controller';\nimport { CreateArrayFromList } from '../abstract-ops/ecmascript';\nimport { CloneAsUint8Array } from '../abstract-ops/miscellaneous';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function ReadableStreamTee(stream: ReadableStream,\n cloneForBranch2: boolean): [ReadableStream, ReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream as unknown as ReadableByteStream) as\n unknown as [ReadableStream, ReadableStream];\n }\n return ReadableStreamDefaultTee(stream, cloneForBranch2);\n}\n\nexport function ReadableStreamDefaultTee(\n stream: ReadableStream,\n cloneForBranch2: boolean\n): [DefaultReadableStream, DefaultReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n\n const reader = AcquireReadableStreamDefaultReader(stream);\n\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: DefaultReadableStream;\n let branch2: DefaultReadableStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function pullAlgorithm(): Promise {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm() {\n // do nothing\n }\n\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n\n uponRejection(reader._closedPromise, (r: any) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n\n return [branch1, branch2];\n}\n\nexport function ReadableByteStreamTee(stream: ReadableByteStream): [ReadableByteStream, ReadableByteStream] {\n assert(IsReadableStream(stream));\n assert(IsReadableByteStreamController(stream._readableStreamController));\n\n let reader: ReadableStreamReader> = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: ReadableByteStream;\n let branch2: ReadableByteStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function forwardReaderError(thisReader: ReadableStreamReader>) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n assert(reader._readIntoRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n\n const readRequest: ReadRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n\n function pullWithBYOBReader(view: NonShared, forBranch2: boolean) {\n if (IsReadableStreamDefaultReader>(reader)) {\n assert(reader._readRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n\n const readIntoRequest: ReadIntoRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n } else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n\n if (chunk !== undefined) {\n assert(chunk.byteLength === 0);\n\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n\n function pull1Algorithm(): Promise {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, false);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function pull2Algorithm(): Promise {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, true);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm(): void {\n return;\n }\n\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n\n forwardReaderError(reader);\n\n return [branch1, branch2];\n}\n","import { CreateReadableStream, type DefaultReadableStream } from '../readable-stream';\nimport {\n isReadableStreamLike,\n type ReadableStreamDefaultReaderLike,\n type ReadableStreamLike\n} from './readable-stream-like';\nimport { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue } from './default-controller';\nimport { GetIterator, GetMethod, IteratorComplete, IteratorNext, IteratorValue } from '../abstract-ops/ecmascript';\nimport { promiseRejectedWith, promiseResolvedWith, reflectCall, transformPromiseWith } from '../helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport { noop } from '../../utils';\n\nexport function ReadableStreamFrom(\n source: Iterable | AsyncIterable | ReadableStreamLike\n): DefaultReadableStream {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n}\n\nexport function ReadableStreamFromIterable(asyncIterable: Iterable | AsyncIterable): DefaultReadableStream {\n let stream: DefaultReadableStream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n const iterator = iteratorRecord.iterator;\n let returnMethod: (typeof iterator)['return'] | undefined;\n try {\n returnMethod = GetMethod(iterator, 'return');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult: IteratorResult | Promise>;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n\nexport function ReadableStreamFromDefaultReader(\n reader: ReadableStreamDefaultReaderLike\n): DefaultReadableStream {\n let stream: DefaultReadableStream;\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let readPromise;\n try {\n readPromise = reader.read();\n } catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n } catch (e) {\n return promiseRejectedWith(e);\n }\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n","import { typeIsObject } from '../helpers/miscellaneous';\nimport type { ReadableStreamDefaultReadResult } from './default-reader';\n\n/**\n * A common interface for a `ReadadableStream` implementation.\n *\n * @public\n */\nexport interface ReadableStreamLike {\n readonly locked: boolean;\n\n getReader(): ReadableStreamDefaultReaderLike;\n}\n\n/**\n * A common interface for a `ReadableStreamDefaultReader` implementation.\n *\n * @public\n */\nexport interface ReadableStreamDefaultReaderLike {\n readonly closed: Promise;\n\n cancel(reason?: any): Promise;\n\n read(): Promise>;\n\n releaseLock(): void;\n}\n\nexport function isReadableStreamLike(stream: unknown): stream is ReadableStreamLike {\n return typeIsObject(stream) && typeof (stream as ReadableStreamLike).getReader !== 'undefined';\n}\n","import { assertDictionary, assertFunction, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamController,\n UnderlyingByteSource,\n UnderlyingDefaultOrByteSource,\n UnderlyingDefaultOrByteSourcePullCallback,\n UnderlyingDefaultOrByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n ValidatedUnderlyingDefaultOrByteSource\n} from '../readable-stream/underlying-source';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\n\nexport function convertUnderlyingDefaultOrByteSource(\n source: UnderlyingSource | UnderlyingByteSource | null,\n context: string\n): ValidatedUnderlyingDefaultOrByteSource {\n assertDictionary(source, context);\n const original = source as (UnderlyingDefaultOrByteSource | null);\n const autoAllocateChunkSize = original?.autoAllocateChunkSize;\n const cancel = original?.cancel;\n const pull = original?.pull;\n const start = original?.start;\n const type = original?.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(\n autoAllocateChunkSize,\n `${context} has member 'autoAllocateChunkSize' that`\n ),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original!, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original!, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n}\n\nfunction convertUnderlyingSourceCancelCallback(\n fn: UnderlyingSourceCancelCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSourcePullCallback(\n fn: UnderlyingDefaultOrByteSourcePullCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (controller: ReadableStreamController) => Promise {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSourceStartCallback(\n fn: UnderlyingDefaultOrByteSourceStartCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): UnderlyingDefaultOrByteSourceStartCallback {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertReadableStreamType(type: string, context: string): 'bytes' {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n}\n","import { assertDictionary } from './basic';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from '../readable-stream/pipe-options';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\n\nexport function convertPipeOptions(options: StreamPipeOptions | null | undefined,\n context: string): ValidatedStreamPipeOptions {\n assertDictionary(options, context);\n const preventAbort = options?.preventAbort;\n const preventCancel = options?.preventCancel;\n const preventClose = options?.preventClose;\n const signal = options?.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n}\n\nfunction assertAbortSignal(signal: unknown, context: string): asserts signal is AbortSignal {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n}\n","import assert from '../stub/assert';\nimport {\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith\n} from './helpers/webidl';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { AcquireReadableStreamAsyncIterator, type ReadableStreamAsyncIterator } from './readable-stream/async-iterator';\nimport { defaultReaderClosedPromiseReject, defaultReaderClosedPromiseResolve } from './readable-stream/generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderErrorReadRequests,\n type ReadableStreamDefaultReadResult\n} from './readable-stream/default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBReaderErrorReadIntoRequests,\n type ReadableStreamBYOBReadResult\n} from './readable-stream/byob-reader';\nimport { ReadableStreamPipeTo } from './readable-stream/pipe';\nimport { ReadableStreamTee } from './readable-stream/tee';\nimport { ReadableStreamFrom } from './readable-stream/from';\nimport { IsWritableStream, IsWritableStreamLocked, WritableStream } from './writable-stream';\nimport { SimpleQueue } from './simple-queue';\nimport {\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n SetUpReadableByteStreamController,\n SetUpReadableByteStreamControllerFromUnderlyingSource\n} from './readable-stream/byte-stream-controller';\nimport {\n ReadableStreamDefaultController,\n SetUpReadableStreamDefaultController,\n SetUpReadableStreamDefaultControllerFromUnderlyingSource\n} from './readable-stream/default-controller';\nimport type {\n UnderlyingByteSource,\n UnderlyingByteSourcePullCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceStartCallback\n} from './readable-stream/underlying-source';\nimport { noop } from '../utils';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { CreateArrayFromList, SymbolAsyncIterator } from './abstract-ops/ecmascript';\nimport { CancelSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertUnderlyingDefaultOrByteSource } from './validators/underlying-source';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions\n} from './readable-stream/reader-options';\nimport { convertReaderOptions } from './validators/reader-options';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from './readable-stream/pipe-options';\nimport type { ReadableStreamIteratorOptions } from './readable-stream/iterator-options';\nimport { convertIteratorOptions } from './validators/iterator-options';\nimport { convertPipeOptions } from './validators/pipe-options';\nimport type { ReadableWritablePair } from './readable-stream/readable-writable-pair';\nimport { convertReadableWritablePair } from './validators/readable-writable-pair';\nimport type { ReadableStreamDefaultReaderLike, ReadableStreamLike } from './readable-stream/readable-stream-like';\nimport type { NonShared } from './helpers/array-buffer-view';\n\nexport type DefaultReadableStream = ReadableStream & {\n _readableStreamController: ReadableStreamDefaultController\n};\n\nexport type ReadableByteStream = ReadableStream> & {\n _readableStreamController: ReadableByteStreamController\n};\n\ntype ReadableStreamState = 'readable' | 'closed' | 'errored';\n\n/**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\nexport class ReadableStream implements AsyncIterable {\n /** @internal */\n _state!: ReadableStreamState;\n /** @internal */\n _reader: ReadableStreamReader | undefined;\n /** @internal */\n _storedError: any;\n /** @internal */\n _disturbed!: boolean;\n /** @internal */\n _readableStreamController!: ReadableStreamDefaultController | ReadableByteStreamController;\n\n constructor(underlyingSource: UnderlyingByteSource, strategy?: { highWaterMark?: number; size?: undefined });\n constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSource: UnderlyingSource | UnderlyingByteSource | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n } else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n\n InitializeReadableStream(this);\n\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(\n this as unknown as ReadableByteStream,\n underlyingSource,\n highWaterMark\n );\n } else {\n assert(underlyingSource.type === undefined);\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n this,\n underlyingSource,\n highWaterMark,\n sizeAlgorithm\n );\n }\n }\n\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked(): boolean {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsReadableStreamLocked(this);\n }\n\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('cancel'));\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n\n return ReadableStreamCancel(this, reason);\n }\n\n /**\n * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader.\n *\n * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams,\n * i.e. streams which were constructed specifically with the ability to handle \"bring your own buffer\" reading.\n * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its\n * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise\n * control over allocation.\n */\n getReader({ mode }: { mode: 'byob' }): ReadableStreamBYOBReader;\n /**\n * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader.\n * While the stream is locked, no other reader can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to consume a stream\n * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours\n * or cancel the stream, which would interfere with your abstraction.\n */\n getReader(): ReadableStreamDefaultReader;\n getReader(\n rawOptions: ReadableStreamGetReaderOptions | null | undefined = undefined\n ): ReadableStreamDefaultReader | ReadableStreamBYOBReader {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('getReader');\n }\n\n const options = convertReaderOptions(rawOptions, 'First parameter');\n\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n\n assert(options.mode === 'byob');\n return AcquireReadableStreamBYOBReader(this as unknown as ReadableByteStream);\n }\n\n /**\n * Provides a convenient, chainable way of piping this readable stream through a transform stream\n * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream\n * into the writable side of the supplied pair, and returns the readable side for further use.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeThrough(\n transform: { readable: RS; writable: WritableStream },\n options?: StreamPipeOptions\n ): RS;\n pipeThrough(\n rawTransform: { readable: RS; writable: WritableStream } | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}\n ): RS {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n\n const promise = ReadableStreamPipeTo(\n this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n\n setPromiseIsHandledToTrue(promise);\n\n return transform.readable;\n }\n\n /**\n * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under\n * various error conditions can be customized with a number of passed options. It returns a promise that fulfills\n * when the piping process completes successfully, or rejects if any errors were encountered.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise;\n pipeTo(destination: WritableStream | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('pipeTo'));\n }\n\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(\n new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)\n );\n }\n\n let options: ValidatedStreamPipeOptions;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')\n );\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')\n );\n }\n\n return ReadableStreamPipeTo(\n this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n }\n\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee(): [ReadableStream, ReadableStream] {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('tee');\n }\n\n const branches = ReadableStreamTee(this, false);\n return CreateArrayFromList(branches);\n }\n\n /**\n * Asynchronously iterates over the chunks in the stream's internal queue.\n *\n * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader.\n * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method\n * is called, e.g. by breaking out of the loop.\n *\n * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also\n * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing\n * `true` for the `preventCancel` option.\n */\n values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n values(rawOptions: ReadableStreamIteratorOptions | null | undefined = undefined): ReadableStreamAsyncIterator {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('values');\n }\n\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n\n /**\n * {@inheritDoc ReadableStream.values}\n */\n [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n\n [SymbolAsyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator {\n // Stub implementation, overridden below\n return this.values(options);\n }\n\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream {\n return ReadableStreamFrom(asyncIterable);\n }\n}\n\nObject.defineProperties(ReadableStream, {\n from: { enumerable: true }\n});\nObject.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(ReadableStream.from, 'from');\nsetFunctionName(ReadableStream.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStream.prototype.getReader, 'getReader');\nsetFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\nsetFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\nsetFunctionName(ReadableStream.prototype.tee, 'tee');\nsetFunctionName(ReadableStream.prototype.values, 'values');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n}\nObject.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n});\n\nexport type {\n ReadableStreamAsyncIterator,\n ReadableStreamDefaultReadResult,\n ReadableStreamBYOBReadResult,\n ReadableStreamBYOBReaderReadOptions,\n UnderlyingByteSource,\n UnderlyingSource,\n UnderlyingSourceStartCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceCancelCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingByteSourcePullCallback,\n StreamPipeOptions,\n ReadableWritablePair,\n ReadableStreamIteratorOptions,\n ReadableStreamLike,\n ReadableStreamDefaultReaderLike\n};\n\n// Abstract operations for the ReadableStream.\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1\n): DefaultReadableStream {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: DefaultReadableStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n\n return stream;\n}\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableByteStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise\n): ReadableByteStream {\n const stream: ReadableByteStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n\n return stream;\n}\n\nfunction InitializeReadableStream(stream: ReadableStream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n}\n\nexport function IsReadableStream(x: unknown): x is ReadableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStream;\n}\n\nexport function IsReadableStreamDisturbed(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n return stream._disturbed;\n}\n\nexport function IsReadableStreamLocked(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n if (stream._reader === undefined) {\n return false;\n }\n\n return true;\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamCancel(stream: ReadableStream, reason: any): Promise {\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n ReadableStreamClose(stream);\n\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n}\n\nexport function ReadableStreamClose(stream: ReadableStream): void {\n assert(stream._state === 'readable');\n\n stream._state = 'closed';\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseResolve(reader);\n\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n}\n\nexport function ReadableStreamError(stream: ReadableStream, e: any): void {\n assert(IsReadableStream(stream));\n assert(stream._state === 'readable');\n\n stream._state = 'errored';\n stream._storedError = e;\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseReject(reader, e);\n\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n } else {\n assert(IsReadableStreamBYOBReader(reader));\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n}\n\n// Readers\n\nexport type ReadableStreamReader = ReadableStreamDefaultReader | ReadableStreamBYOBReader;\n\nexport {\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader\n};\n\n// Controllers\n\nexport {\n ReadableStreamDefaultController,\n ReadableStreamBYOBRequest,\n ReadableByteStreamController\n};\n\n// Helper functions for the ReadableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n}\n","import { assertDictionary, assertRequiredField } from './basic';\nimport { ReadableStream } from '../readable-stream';\nimport { WritableStream } from '../writable-stream';\nimport { assertReadableStream } from './readable-stream';\nimport { assertWritableStream } from './writable-stream';\n\nexport function convertReadableWritablePair(\n pair: { readable: RS; writable: WS } | null | undefined,\n context: string\n): { readable: RS; writable: WS } {\n assertDictionary(pair, context);\n\n const readable = pair?.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n\n const writable = pair?.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n\n return { readable, writable };\n}\n","import { assertDictionary } from './basic';\nimport type {\n ReadableStreamIteratorOptions,\n ValidatedReadableStreamIteratorOptions\n} from '../readable-stream/iterator-options';\n\nexport function convertIteratorOptions(options: ReadableStreamIteratorOptions | null | undefined,\n context: string): ValidatedReadableStreamIteratorOptions {\n assertDictionary(options, context);\n const preventCancel = options?.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n}\n","import type { QueuingStrategyInit } from '../queuing-strategy';\nimport { assertDictionary, assertRequiredField, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategyInit(init: QueuingStrategyInit | null | undefined,\n context: string): QueuingStrategyInit {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst byteLengthSizeFunction = (chunk: ArrayBufferView): number => {\n return chunk.byteLength;\n};\nsetFunctionName(byteLengthSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\nexport default class ByteLengthQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _byteLengthQueuingStrategyHighWaterMark: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size(): (chunk: ArrayBufferView) => number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n}\n\nObject.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the ByteLengthQueuingStrategy.\n\nfunction byteLengthBrandCheckException(name: string): TypeError {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n}\n\nexport function IsByteLengthQueuingStrategy(x: any): x is ByteLengthQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof ByteLengthQueuingStrategy;\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst countSizeFunction = (): 1 => {\n return 1;\n};\nsetFunctionName(countSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\nexport default class CountQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _countQueuingStrategyHighWaterMark!: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size(): (chunk: any) => 1 {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n}\n\nObject.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the CountQueuingStrategy.\n\nfunction countBrandCheckException(name: string): TypeError {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n}\n\nexport function IsCountQueuingStrategy(x: any): x is CountQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof CountQueuingStrategy;\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from '../transform-stream/transformer';\nimport { TransformStreamDefaultController } from '../transform-stream';\n\nexport function convertTransformer(original: Transformer | null,\n context: string): ValidatedTransformer {\n assertDictionary(original, context);\n const cancel = original?.cancel;\n const flush = original?.flush;\n const readableType = original?.readableType;\n const start = original?.start;\n const transform = original?.transform;\n const writableType = original?.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original!, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original!, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original!, `${context} has member 'transform' that`),\n writableType\n };\n}\n\nfunction convertTransformerFlushCallback(\n fn: TransformerFlushCallback,\n original: Transformer,\n context: string\n): (controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertTransformerStartCallback(\n fn: TransformerStartCallback,\n original: Transformer,\n context: string\n): TransformerStartCallback {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertTransformerTransformCallback(\n fn: TransformerTransformCallback,\n original: Transformer,\n context: string\n): (chunk: I, controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: I, controller: TransformStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n\nfunction convertTransformerCancelCallback(\n fn: TransformerCancelCallback,\n original: Transformer,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith,\n uponPromise\n} from './helpers/webidl';\nimport { CreateReadableStream, type DefaultReadableStream, ReadableStream } from './readable-stream';\nimport {\n ReadableStreamDefaultControllerCanCloseOrEnqueue,\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError,\n ReadableStreamDefaultControllerGetDesiredSize,\n ReadableStreamDefaultControllerHasBackpressure\n} from './readable-stream/default-controller';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { CreateWritableStream, WritableStream, WritableStreamDefaultControllerErrorIfNeeded } from './writable-stream';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from './transform-stream/transformer';\nimport { convertTransformer } from './validators/transformer';\n\n// Class TransformStream\n\n/**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\nexport class TransformStream {\n /** @internal */\n _writable!: WritableStream;\n /** @internal */\n _readable!: DefaultReadableStream;\n /** @internal */\n _backpressure!: boolean;\n /** @internal */\n _backpressureChangePromise!: Promise;\n /** @internal */\n _backpressureChangePromise_resolve!: () => void;\n /** @internal */\n _transformStreamController!: TransformStreamDefaultController;\n\n constructor(\n transformer?: Transformer,\n writableStrategy?: QueuingStrategy,\n readableStrategy?: QueuingStrategy\n );\n constructor(rawTransformer: Transformer | null | undefined = {},\n rawWritableStrategy: QueuingStrategy | null | undefined = {},\n rawReadableStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(\n this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm\n );\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n } else {\n startPromise_resolve(undefined);\n }\n }\n\n /**\n * The readable side of the transform stream.\n */\n get readable(): ReadableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n\n return this._readable;\n }\n\n /**\n * The writable side of the transform stream.\n */\n get writable(): WritableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n\n return this._writable;\n }\n}\n\nObject.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n}\n\nexport type {\n Transformer,\n TransformerCancelCallback,\n TransformerStartCallback,\n TransformerFlushCallback,\n TransformerTransformCallback\n};\n\n// Transform Stream Abstract Operations\n\nexport function CreateTransformStream(startAlgorithm: () => void | PromiseLike,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n writableHighWaterMark = 1,\n writableSizeAlgorithm: QueuingStrategySizeCallback = () => 1,\n readableHighWaterMark = 0,\n readableSizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(writableHighWaterMark));\n assert(IsNonNegativeNumber(readableHighWaterMark));\n\n const stream: TransformStream = Object.create(TransformStream.prototype);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n\n const startResult = startAlgorithm();\n startPromise_resolve(startResult);\n return stream;\n}\n\nfunction InitializeTransformStream(stream: TransformStream,\n startPromise: Promise,\n writableHighWaterMark: number,\n writableSizeAlgorithm: QueuingStrategySizeCallback,\n readableHighWaterMark: number,\n readableSizeAlgorithm: QueuingStrategySizeCallback) {\n function startAlgorithm(): Promise {\n return startPromise;\n }\n\n function writeAlgorithm(chunk: I): Promise {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n\n function abortAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n\n function closeAlgorithm(): Promise {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm,\n writableHighWaterMark, writableSizeAlgorithm);\n\n function pullAlgorithm(): Promise {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n\n function cancelAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined!;\n stream._backpressureChangePromise = undefined!;\n stream._backpressureChangePromise_resolve = undefined!;\n TransformStreamSetBackpressure(stream, true);\n\n stream._transformStreamController = undefined!;\n}\n\nfunction IsTransformStream(x: unknown): x is TransformStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n\n return x instanceof TransformStream;\n}\n\n// This is a no-op if both sides are already errored.\nfunction TransformStreamError(stream: TransformStream, e: any) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n}\n\nfunction TransformStreamErrorWritableAndUnblockWrite(stream: TransformStream, e: any) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n}\n\nfunction TransformStreamUnblockWrite(stream: TransformStream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure()\n // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time\n // _backpressure is set.\n TransformStreamSetBackpressure(stream, false);\n }\n}\n\nfunction TransformStreamSetBackpressure(stream: TransformStream, backpressure: boolean) {\n // Passes also when called during construction.\n assert(stream._backpressure !== backpressure);\n\n if (stream._backpressureChangePromise !== undefined) {\n stream._backpressureChangePromise_resolve();\n }\n\n stream._backpressureChangePromise = newPromise(resolve => {\n stream._backpressureChangePromise_resolve = resolve;\n });\n\n stream._backpressure = backpressure;\n}\n\n// Class TransformStreamDefaultController\n\n/**\n * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}.\n *\n * @public\n */\nexport class TransformStreamDefaultController {\n /** @internal */\n _controlledTransformStream: TransformStream;\n /** @internal */\n _finishPromise: Promise | undefined;\n /** @internal */\n _finishPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _finishPromise_reject?: (reason: any) => void;\n /** @internal */\n _transformAlgorithm: (chunk: any) => Promise;\n /** @internal */\n _flushAlgorithm: () => Promise;\n /** @internal */\n _cancelAlgorithm: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full.\n */\n get desiredSize(): number | null {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n const readableController = this._controlledTransformStream._readable._readableStreamController;\n return ReadableStreamDefaultControllerGetDesiredSize(readableController);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the readable side of the controlled transform stream.\n */\n enqueue(chunk: O): void;\n enqueue(chunk: O = undefined!): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n TransformStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors both the readable side and the writable side of the controlled transform stream, making all future\n * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.\n */\n error(reason: any = undefined): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n TransformStreamDefaultControllerError(this, reason);\n }\n\n /**\n * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate(): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n\n TransformStreamDefaultControllerTerminate(this);\n }\n}\n\nObject.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(TransformStreamDefaultController.prototype.error, 'error');\nsetFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n}\n\n// Transform Stream Default Controller Abstract Operations\n\nfunction IsTransformStreamDefaultController(x: any): x is TransformStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n\n return x instanceof TransformStreamDefaultController;\n}\n\nfunction SetUpTransformStreamDefaultController(stream: TransformStream,\n controller: TransformStreamDefaultController,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise) {\n assert(IsTransformStream(stream));\n assert(stream._transformStreamController === undefined);\n\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nfunction SetUpTransformStreamDefaultControllerFromTransformer(stream: TransformStream,\n transformer: ValidatedTransformer) {\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n let transformAlgorithm: (chunk: I) => Promise;\n let flushAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform!(chunk, controller);\n } else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk as unknown as O);\n return promiseResolvedWith(undefined);\n } catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush!(controller);\n } else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n}\n\nfunction TransformStreamDefaultControllerClearAlgorithms(controller: TransformStreamDefaultController) {\n controller._transformAlgorithm = undefined!;\n controller._flushAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\nfunction TransformStreamDefaultControllerEnqueue(controller: TransformStreamDefaultController, chunk: O) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n\n // We throttle transform invocations based on the backpressure of the ReadableStream, but we still\n // accept TransformStreamDefaultControllerEnqueue() calls.\n\n try {\n ReadableStreamDefaultControllerEnqueue(readableController, chunk);\n } catch (e) {\n // This happens when readableStrategy.size() throws.\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n\n throw stream._readable._storedError;\n }\n\n const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);\n if (backpressure !== stream._backpressure) {\n assert(backpressure);\n TransformStreamSetBackpressure(stream, true);\n }\n}\n\nfunction TransformStreamDefaultControllerError(controller: TransformStreamDefaultController, e: any) {\n TransformStreamError(controller._controlledTransformStream, e);\n}\n\nfunction TransformStreamDefaultControllerPerformTransform(controller: TransformStreamDefaultController,\n chunk: I) {\n const transformPromise = controller._transformAlgorithm(chunk);\n return transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n}\n\nfunction TransformStreamDefaultControllerTerminate(controller: TransformStreamDefaultController) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n\n ReadableStreamDefaultControllerClose(readableController);\n\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n}\n\n// TransformStreamDefaultSink Algorithms\n\nfunction TransformStreamDefaultSinkWriteAlgorithm(stream: TransformStream, chunk: I): Promise {\n assert(stream._writable._state === 'writable');\n\n const controller = stream._transformStreamController;\n\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n assert(backpressureChangePromise !== undefined);\n return transformPromiseWith(backpressureChangePromise, () => {\n const writable = stream._writable;\n const state = writable._state;\n if (state === 'erroring') {\n throw writable._storedError;\n }\n assert(state === 'writable');\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n });\n }\n\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n}\n\nfunction TransformStreamDefaultSinkAbortAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally,\n // we don't run the _cancelAlgorithm again.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerError(readable._readableStreamController, reason);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\nfunction TransformStreamDefaultSinkCloseAlgorithm(stream: TransformStream): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// TransformStreamDefaultSource Algorithms\n\nfunction TransformStreamDefaultSourcePullAlgorithm(stream: TransformStream): Promise {\n // Invariant. Enforced by the promises returned by start() and pull().\n assert(stream._backpressure);\n\n assert(stream._backpressureChangePromise !== undefined);\n\n TransformStreamSetBackpressure(stream, false);\n\n // Prevent the next pull() call until there is backpressure.\n return stream._backpressureChangePromise;\n}\n\nfunction TransformStreamDefaultSourceCancelAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._writable cannot change after construction, so caching it across a call to user code is safe.\n const writable = stream._writable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or\n // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the\n // _flushAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (writable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, writable._storedError);\n } else {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// Helper functions for the TransformStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n}\n\nexport function defaultControllerFinishPromiseResolve(controller: TransformStreamDefaultController) {\n if (controller._finishPromise_resolve === undefined) {\n return;\n }\n\n controller._finishPromise_resolve();\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nexport function defaultControllerFinishPromiseReject(controller: TransformStreamDefaultController, reason: any) {\n if (controller._finishPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(controller._finishPromise!);\n controller._finishPromise_reject(reason);\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\n// Helper functions for the TransformStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStream.prototype.${name} can only be used on a TransformStream`);\n}\n","import {\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n ReadableByteStreamController,\n ReadableStream,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultController,\n ReadableStreamDefaultReader,\n TransformStream,\n TransformStreamDefaultController,\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter\n} from './ponyfill';\nimport { globals } from './globals';\n\n// Export\nexport * from './ponyfill';\n\nconst exports = {\n ReadableStream,\n ReadableStreamDefaultController,\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader,\n\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter,\n\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n\n TransformStream,\n TransformStreamDefaultController\n};\n\n// Add classes to global scope\nif (typeof 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\ No newline at end of file diff --git a/node_modules/web-streams-polyfill/dist/polyfill.es2018.mjs b/node_modules/web-streams-polyfill/dist/polyfill.es2018.mjs new file mode 100644 index 00000000..822ef39a --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/polyfill.es2018.mjs @@ -0,0 +1,4745 @@ +/** + * @license + * web-streams-polyfill v3.3.3 + * Copyright 2024 Mattias Buelens, Diwank Singh Tomer and other contributors. + * This code is released under the MIT license. + * SPDX-License-Identifier: MIT + */ +function noop() { + return undefined; +} + +function typeIsObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; +} +const rethrowAssertionErrorRejection = noop; +function setFunctionName(fn, name) { + try { + Object.defineProperty(fn, 'name', { + value: name, + configurable: true + }); + } + catch (_a) { + // This property is non-configurable in older browsers, so ignore if this throws. + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility + } +} + +const originalPromise = Promise; +const originalPromiseThen = Promise.prototype.then; +const originalPromiseReject = Promise.reject.bind(originalPromise); +// https://webidl.spec.whatwg.org/#a-new-promise +function newPromise(executor) { + return new originalPromise(executor); +} +// https://webidl.spec.whatwg.org/#a-promise-resolved-with +function promiseResolvedWith(value) { + return newPromise(resolve => resolve(value)); +} +// https://webidl.spec.whatwg.org/#a-promise-rejected-with +function promiseRejectedWith(reason) { + return originalPromiseReject(reason); +} +function PerformPromiseThen(promise, onFulfilled, onRejected) { + // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an + // approximation. + return originalPromiseThen.call(promise, onFulfilled, onRejected); +} +// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned +// from that handler. To prevent this, return null instead of void from all handlers. +// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it +function uponPromise(promise, onFulfilled, onRejected) { + PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection); +} +function uponFulfillment(promise, onFulfilled) { + uponPromise(promise, onFulfilled); +} +function uponRejection(promise, onRejected) { + uponPromise(promise, undefined, onRejected); +} +function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) { + return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler); +} +function setPromiseIsHandledToTrue(promise) { + PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection); +} +let _queueMicrotask = callback => { + if (typeof queueMicrotask === 'function') { + _queueMicrotask = queueMicrotask; + } + else { + const resolvedPromise = promiseResolvedWith(undefined); + _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb); + } + return _queueMicrotask(callback); +}; +function reflectCall(F, V, args) { + if (typeof F !== 'function') { + throw new TypeError('Argument is not a function'); + } + return Function.prototype.apply.call(F, V, args); +} +function promiseCall(F, V, args) { + try { + return promiseResolvedWith(reflectCall(F, V, args)); + } + catch (value) { + return promiseRejectedWith(value); + } +} + +// Original from Chromium +// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js +const QUEUE_MAX_ARRAY_SIZE = 16384; +/** + * Simple queue structure. + * + * Avoids scalability issues with using a packed array directly by using + * multiple arrays in a linked list and keeping the array size bounded. + */ +class SimpleQueue { + constructor() { + this._cursor = 0; + this._size = 0; + // _front and _back are always defined. + this._front = { + _elements: [], + _next: undefined + }; + this._back = this._front; + // The cursor is used to avoid calling Array.shift(). + // It contains the index of the front element of the array inside the + // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE). + this._cursor = 0; + // When there is only one node, size === elements.length - cursor. + this._size = 0; + } + get length() { + return this._size; + } + // For exception safety, this method is structured in order: + // 1. Read state + // 2. Calculate required state mutations + // 3. Perform state mutations + push(element) { + const oldBack = this._back; + let newBack = oldBack; + if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) { + newBack = { + _elements: [], + _next: undefined + }; + } + // push() is the mutation most likely to throw an exception, so it + // goes first. + oldBack._elements.push(element); + if (newBack !== oldBack) { + this._back = newBack; + oldBack._next = newBack; + } + ++this._size; + } + // Like push(), shift() follows the read -> calculate -> mutate pattern for + // exception safety. + shift() { // must not be called on an empty queue + const oldFront = this._front; + let newFront = oldFront; + const oldCursor = this._cursor; + let newCursor = oldCursor + 1; + const elements = oldFront._elements; + const element = elements[oldCursor]; + if (newCursor === QUEUE_MAX_ARRAY_SIZE) { + newFront = oldFront._next; + newCursor = 0; + } + // No mutations before this point. + --this._size; + this._cursor = newCursor; + if (oldFront !== newFront) { + this._front = newFront; + } + // Permit shifted element to be garbage collected. + elements[oldCursor] = undefined; + return element; + } + // The tricky thing about forEach() is that it can be called + // re-entrantly. The queue may be mutated inside the callback. It is easy to + // see that push() within the callback has no negative effects since the end + // of the queue is checked for on every iteration. If shift() is called + // repeatedly within the callback then the next iteration may return an + // element that has been removed. In this case the callback will be called + // with undefined values until we either "catch up" with elements that still + // exist or reach the back of the queue. + forEach(callback) { + let i = this._cursor; + let node = this._front; + let elements = node._elements; + while (i !== elements.length || node._next !== undefined) { + if (i === elements.length) { + node = node._next; + elements = node._elements; + i = 0; + if (elements.length === 0) { + break; + } + } + callback(elements[i]); + ++i; + } + } + // Return the element that would be returned if shift() was called now, + // without modifying the queue. + peek() { // must not be called on an empty queue + const front = this._front; + const cursor = this._cursor; + return front._elements[cursor]; + } +} + +const AbortSteps = Symbol('[[AbortSteps]]'); +const ErrorSteps = Symbol('[[ErrorSteps]]'); +const CancelSteps = Symbol('[[CancelSteps]]'); +const PullSteps = Symbol('[[PullSteps]]'); +const ReleaseSteps = Symbol('[[ReleaseSteps]]'); + +function ReadableStreamReaderGenericInitialize(reader, stream) { + reader._ownerReadableStream = stream; + stream._reader = reader; + if (stream._state === 'readable') { + defaultReaderClosedPromiseInitialize(reader); + } + else if (stream._state === 'closed') { + defaultReaderClosedPromiseInitializeAsResolved(reader); + } + else { + defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError); + } +} +// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state +// check. +function ReadableStreamReaderGenericCancel(reader, reason) { + const stream = reader._ownerReadableStream; + return ReadableStreamCancel(stream, reason); +} +function ReadableStreamReaderGenericRelease(reader) { + const stream = reader._ownerReadableStream; + if (stream._state === 'readable') { + defaultReaderClosedPromiseReject(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + else { + defaultReaderClosedPromiseResetToRejected(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + stream._readableStreamController[ReleaseSteps](); + stream._reader = undefined; + reader._ownerReadableStream = undefined; +} +// Helper functions for the readers. +function readerLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released reader'); +} +// Helper functions for the ReadableStreamDefaultReader. +function defaultReaderClosedPromiseInitialize(reader) { + reader._closedPromise = newPromise((resolve, reject) => { + reader._closedPromise_resolve = resolve; + reader._closedPromise_reject = reject; + }); +} +function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseReject(reader, reason); +} +function defaultReaderClosedPromiseInitializeAsResolved(reader) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseResolve(reader); +} +function defaultReaderClosedPromiseReject(reader, reason) { + if (reader._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(reader._closedPromise); + reader._closedPromise_reject(reason); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; +} +function defaultReaderClosedPromiseResetToRejected(reader, reason) { + defaultReaderClosedPromiseInitializeAsRejected(reader, reason); +} +function defaultReaderClosedPromiseResolve(reader) { + if (reader._closedPromise_resolve === undefined) { + return; + } + reader._closedPromise_resolve(undefined); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; +} + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill +const NumberIsFinite = Number.isFinite || function (x) { + return typeof x === 'number' && isFinite(x); +}; + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill +const MathTrunc = Math.trunc || function (v) { + return v < 0 ? Math.ceil(v) : Math.floor(v); +}; + +// https://heycam.github.io/webidl/#idl-dictionaries +function isDictionary(x) { + return typeof x === 'object' || typeof x === 'function'; +} +function assertDictionary(obj, context) { + if (obj !== undefined && !isDictionary(obj)) { + throw new TypeError(`${context} is not an object.`); + } +} +// https://heycam.github.io/webidl/#idl-callback-functions +function assertFunction(x, context) { + if (typeof x !== 'function') { + throw new TypeError(`${context} is not a function.`); + } +} +// https://heycam.github.io/webidl/#idl-object +function isObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; +} +function assertObject(x, context) { + if (!isObject(x)) { + throw new TypeError(`${context} is not an object.`); + } +} +function assertRequiredArgument(x, position, context) { + if (x === undefined) { + throw new TypeError(`Parameter ${position} is required in '${context}'.`); + } +} +function assertRequiredField(x, field, context) { + if (x === undefined) { + throw new TypeError(`${field} is required in '${context}'.`); + } +} +// https://heycam.github.io/webidl/#idl-unrestricted-double +function convertUnrestrictedDouble(value) { + return Number(value); +} +function censorNegativeZero(x) { + return x === 0 ? 0 : x; +} +function integerPart(x) { + return censorNegativeZero(MathTrunc(x)); +} +// https://heycam.github.io/webidl/#idl-unsigned-long-long +function convertUnsignedLongLongWithEnforceRange(value, context) { + const lowerBound = 0; + const upperBound = Number.MAX_SAFE_INTEGER; + let x = Number(value); + x = censorNegativeZero(x); + if (!NumberIsFinite(x)) { + throw new TypeError(`${context} is not a finite number`); + } + x = integerPart(x); + if (x < lowerBound || x > upperBound) { + throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`); + } + if (!NumberIsFinite(x) || x === 0) { + return 0; + } + // TODO Use BigInt if supported? + // let xBigInt = BigInt(integerPart(x)); + // xBigInt = BigInt.asUintN(64, xBigInt); + // return Number(xBigInt); + return x; +} + +function assertReadableStream(x, context) { + if (!IsReadableStream(x)) { + throw new TypeError(`${context} is not a ReadableStream.`); + } +} + +// Abstract operations for the ReadableStream. +function AcquireReadableStreamDefaultReader(stream) { + return new ReadableStreamDefaultReader(stream); +} +// ReadableStream API exposed for controllers. +function ReadableStreamAddReadRequest(stream, readRequest) { + stream._reader._readRequests.push(readRequest); +} +function ReadableStreamFulfillReadRequest(stream, chunk, done) { + const reader = stream._reader; + const readRequest = reader._readRequests.shift(); + if (done) { + readRequest._closeSteps(); + } + else { + readRequest._chunkSteps(chunk); + } +} +function ReadableStreamGetNumReadRequests(stream) { + return stream._reader._readRequests.length; +} +function ReadableStreamHasDefaultReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamDefaultReader(reader)) { + return false; + } + return true; +} +/** + * A default reader vended by a {@link ReadableStream}. + * + * @public + */ +class ReadableStreamDefaultReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, + * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + /** + * Returns a promise that allows access to the next chunk from the stream's internal queue, if available. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + read() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('read')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: () => resolvePromise({ value: undefined, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamDefaultReaderRead(this, readRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamDefaultReader(this)) { + throw defaultReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamDefaultReaderRelease(this); + } +} +Object.defineProperties(ReadableStreamDefaultReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } +}); +setFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel'); +setFunctionName(ReadableStreamDefaultReader.prototype.read, 'read'); +setFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultReader', + configurable: true + }); +} +// Abstract operations for the readers. +function IsReadableStreamDefaultReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) { + return false; + } + return x instanceof ReadableStreamDefaultReader; +} +function ReadableStreamDefaultReaderRead(reader, readRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'closed') { + readRequest._closeSteps(); + } + else if (stream._state === 'errored') { + readRequest._errorSteps(stream._storedError); + } + else { + stream._readableStreamController[PullSteps](readRequest); + } +} +function ReadableStreamDefaultReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamDefaultReaderErrorReadRequests(reader, e); +} +function ReadableStreamDefaultReaderErrorReadRequests(reader, e) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._errorSteps(e); + }); +} +// Helper functions for the ReadableStreamDefaultReader. +function defaultReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`); +} + +/// +/* eslint-disable @typescript-eslint/no-empty-function */ +const AsyncIteratorPrototype = Object.getPrototypeOf(Object.getPrototypeOf(async function* () { }).prototype); + +/// +class ReadableStreamAsyncIteratorImpl { + constructor(reader, preventCancel) { + this._ongoingPromise = undefined; + this._isFinished = false; + this._reader = reader; + this._preventCancel = preventCancel; + } + next() { + const nextSteps = () => this._nextSteps(); + this._ongoingPromise = this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) : + nextSteps(); + return this._ongoingPromise; + } + return(value) { + const returnSteps = () => this._returnSteps(value); + return this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) : + returnSteps(); + } + _nextSteps() { + if (this._isFinished) { + return Promise.resolve({ value: undefined, done: true }); + } + const reader = this._reader; + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => { + this._ongoingPromise = undefined; + // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test. + // FIXME Is this a bug in the specification, or in the test? + _queueMicrotask(() => resolvePromise({ value: chunk, done: false })); + }, + _closeSteps: () => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + resolvePromise({ value: undefined, done: true }); + }, + _errorSteps: reason => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + rejectPromise(reason); + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promise; + } + _returnSteps(value) { + if (this._isFinished) { + return Promise.resolve({ value, done: true }); + } + this._isFinished = true; + const reader = this._reader; + if (!this._preventCancel) { + const result = ReadableStreamReaderGenericCancel(reader, value); + ReadableStreamReaderGenericRelease(reader); + return transformPromiseWith(result, () => ({ value, done: true })); + } + ReadableStreamReaderGenericRelease(reader); + return promiseResolvedWith({ value, done: true }); + } +} +const ReadableStreamAsyncIteratorPrototype = { + next() { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next')); + } + return this._asyncIteratorImpl.next(); + }, + return(value) { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return')); + } + return this._asyncIteratorImpl.return(value); + } +}; +Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype); +// Abstract operations for the ReadableStream. +function AcquireReadableStreamAsyncIterator(stream, preventCancel) { + const reader = AcquireReadableStreamDefaultReader(stream); + const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel); + const iterator = Object.create(ReadableStreamAsyncIteratorPrototype); + iterator._asyncIteratorImpl = impl; + return iterator; +} +function IsReadableStreamAsyncIterator(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) { + return false; + } + try { + // noinspection SuspiciousTypeOfGuard + return x._asyncIteratorImpl instanceof + ReadableStreamAsyncIteratorImpl; + } + catch (_a) { + return false; + } +} +// Helper functions for the ReadableStream. +function streamAsyncIteratorBrandCheckException(name) { + return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`); +} + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill +const NumberIsNaN = Number.isNaN || function (x) { + // eslint-disable-next-line no-self-compare + return x !== x; +}; + +var _a, _b, _c; +function CreateArrayFromList(elements) { + // We use arrays to represent lists, so this is basically a no-op. + // Do a slice though just in case we happen to depend on the unique-ness. + return elements.slice(); +} +function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) { + new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset); +} +let TransferArrayBuffer = (O) => { + if (typeof O.transfer === 'function') { + TransferArrayBuffer = buffer => buffer.transfer(); + } + else if (typeof structuredClone === 'function') { + TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] }); + } + else { + // Not implemented correctly + TransferArrayBuffer = buffer => buffer; + } + return TransferArrayBuffer(O); +}; +let IsDetachedBuffer = (O) => { + if (typeof O.detached === 'boolean') { + IsDetachedBuffer = buffer => buffer.detached; + } + else { + // Not implemented correctly + IsDetachedBuffer = buffer => buffer.byteLength === 0; + } + return IsDetachedBuffer(O); +}; +function ArrayBufferSlice(buffer, begin, end) { + // ArrayBuffer.prototype.slice is not available on IE10 + // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice + if (buffer.slice) { + return buffer.slice(begin, end); + } + const length = end - begin; + const slice = new ArrayBuffer(length); + CopyDataBlockBytes(slice, 0, buffer, begin, length); + return slice; +} +function GetMethod(receiver, prop) { + const func = receiver[prop]; + if (func === undefined || func === null) { + return undefined; + } + if (typeof func !== 'function') { + throw new TypeError(`${String(prop)} is not a function`); + } + return func; +} +function CreateAsyncFromSyncIterator(syncIteratorRecord) { + // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%, + // we use yield* inside an async generator function to achieve the same result. + // Wrap the sync iterator inside a sync iterable, so we can use it with yield*. + const syncIterable = { + [Symbol.iterator]: () => syncIteratorRecord.iterator + }; + // Create an async generator function and immediately invoke it. + const asyncIterator = (async function* () { + return yield* syncIterable; + }()); + // Return as an async iterator record. + const nextMethod = asyncIterator.next; + return { iterator: asyncIterator, nextMethod, done: false }; +} +// Aligns with core-js/modules/es.symbol.async-iterator.js +const SymbolAsyncIterator = (_c = (_a = Symbol.asyncIterator) !== null && _a !== void 0 ? _a : (_b = Symbol.for) === null || _b === void 0 ? void 0 : _b.call(Symbol, 'Symbol.asyncIterator')) !== null && _c !== void 0 ? _c : '@@asyncIterator'; +function GetIterator(obj, hint = 'sync', method) { + if (method === undefined) { + if (hint === 'async') { + method = GetMethod(obj, SymbolAsyncIterator); + if (method === undefined) { + const syncMethod = GetMethod(obj, Symbol.iterator); + const syncIteratorRecord = GetIterator(obj, 'sync', syncMethod); + return CreateAsyncFromSyncIterator(syncIteratorRecord); + } + } + else { + method = GetMethod(obj, Symbol.iterator); + } + } + if (method === undefined) { + throw new TypeError('The object is not iterable'); + } + const iterator = reflectCall(method, obj, []); + if (!typeIsObject(iterator)) { + throw new TypeError('The iterator method must return an object'); + } + const nextMethod = iterator.next; + return { iterator, nextMethod, done: false }; +} +function IteratorNext(iteratorRecord) { + const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []); + if (!typeIsObject(result)) { + throw new TypeError('The iterator.next() method must return an object'); + } + return result; +} +function IteratorComplete(iterResult) { + return Boolean(iterResult.done); +} +function IteratorValue(iterResult) { + return iterResult.value; +} + +function IsNonNegativeNumber(v) { + if (typeof v !== 'number') { + return false; + } + if (NumberIsNaN(v)) { + return false; + } + if (v < 0) { + return false; + } + return true; +} +function CloneAsUint8Array(O) { + const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength); + return new Uint8Array(buffer); +} + +function DequeueValue(container) { + const pair = container._queue.shift(); + container._queueTotalSize -= pair.size; + if (container._queueTotalSize < 0) { + container._queueTotalSize = 0; + } + return pair.value; +} +function EnqueueValueWithSize(container, value, size) { + if (!IsNonNegativeNumber(size) || size === Infinity) { + throw new RangeError('Size must be a finite, non-NaN, non-negative number.'); + } + container._queue.push({ value, size }); + container._queueTotalSize += size; +} +function PeekQueueValue(container) { + const pair = container._queue.peek(); + return pair.value; +} +function ResetQueue(container) { + container._queue = new SimpleQueue(); + container._queueTotalSize = 0; +} + +function isDataViewConstructor(ctor) { + return ctor === DataView; +} +function isDataView(view) { + return isDataViewConstructor(view.constructor); +} +function arrayBufferViewElementSize(ctor) { + if (isDataViewConstructor(ctor)) { + return 1; + } + return ctor.BYTES_PER_ELEMENT; +} + +/** + * A pull-into request in a {@link ReadableByteStreamController}. + * + * @public + */ +class ReadableStreamBYOBRequest { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the view for writing in to, or `null` if the BYOB request has already been responded to. + */ + get view() { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('view'); + } + return this._view; + } + respond(bytesWritten) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respond'); + } + assertRequiredArgument(bytesWritten, 1, 'respond'); + bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter'); + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(this._view.buffer)) { + throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`); + } + ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten); + } + respondWithNewView(view) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respondWithNewView'); + } + assertRequiredArgument(view, 1, 'respondWithNewView'); + if (!ArrayBuffer.isView(view)) { + throw new TypeError('You can only respond with array buffer views'); + } + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(view.buffer)) { + throw new TypeError('The given view\'s buffer has been detached and so cannot be used as a response'); + } + ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view); + } +} +Object.defineProperties(ReadableStreamBYOBRequest.prototype, { + respond: { enumerable: true }, + respondWithNewView: { enumerable: true }, + view: { enumerable: true } +}); +setFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond'); +setFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBRequest', + configurable: true + }); +} +/** + * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue. + * + * @public + */ +class ReadableByteStreamController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the current BYOB pull request, or `null` if there isn't one. + */ + get byobRequest() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('byobRequest'); + } + return ReadableByteStreamControllerGetBYOBRequest(this); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('desiredSize'); + } + return ReadableByteStreamControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('close'); + } + if (this._closeRequested) { + throw new TypeError('The stream has already been closed; do not close it again!'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`); + } + ReadableByteStreamControllerClose(this); + } + enqueue(chunk) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('enqueue'); + } + assertRequiredArgument(chunk, 1, 'enqueue'); + if (!ArrayBuffer.isView(chunk)) { + throw new TypeError('chunk must be an array buffer view'); + } + if (chunk.byteLength === 0) { + throw new TypeError('chunk must have non-zero byteLength'); + } + if (chunk.buffer.byteLength === 0) { + throw new TypeError(`chunk's buffer must have non-zero byteLength`); + } + if (this._closeRequested) { + throw new TypeError('stream is closed or draining'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`); + } + ReadableByteStreamControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('error'); + } + ReadableByteStreamControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ReadableByteStreamControllerClearPendingPullIntos(this); + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableByteStreamControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableByteStream; + if (this._queueTotalSize > 0) { + ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest); + return; + } + const autoAllocateChunkSize = this._autoAllocateChunkSize; + if (autoAllocateChunkSize !== undefined) { + let buffer; + try { + buffer = new ArrayBuffer(autoAllocateChunkSize); + } + catch (bufferE) { + readRequest._errorSteps(bufferE); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: autoAllocateChunkSize, + byteOffset: 0, + byteLength: autoAllocateChunkSize, + bytesFilled: 0, + minimumFill: 1, + elementSize: 1, + viewConstructor: Uint8Array, + readerType: 'default' + }; + this._pendingPullIntos.push(pullIntoDescriptor); + } + ReadableStreamAddReadRequest(stream, readRequest); + ReadableByteStreamControllerCallPullIfNeeded(this); + } + /** @internal */ + [ReleaseSteps]() { + if (this._pendingPullIntos.length > 0) { + const firstPullInto = this._pendingPullIntos.peek(); + firstPullInto.readerType = 'none'; + this._pendingPullIntos = new SimpleQueue(); + this._pendingPullIntos.push(firstPullInto); + } + } +} +Object.defineProperties(ReadableByteStreamController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + byobRequest: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(ReadableByteStreamController.prototype.close, 'close'); +setFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue'); +setFunctionName(ReadableByteStreamController.prototype.error, 'error'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, { + value: 'ReadableByteStreamController', + configurable: true + }); +} +// Abstract operations for the ReadableByteStreamController. +function IsReadableByteStreamController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) { + return false; + } + return x instanceof ReadableByteStreamController; +} +function IsReadableStreamBYOBRequest(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) { + return false; + } + return x instanceof ReadableStreamBYOBRequest; +} +function ReadableByteStreamControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableByteStreamControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + // TODO: Test controller argument + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableByteStreamControllerError(controller, e); + return null; + }); +} +function ReadableByteStreamControllerClearPendingPullIntos(controller) { + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + controller._pendingPullIntos = new SimpleQueue(); +} +function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) { + let done = false; + if (stream._state === 'closed') { + done = true; + } + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'default') { + ReadableStreamFulfillReadRequest(stream, filledView, done); + } + else { + ReadableStreamFulfillReadIntoRequest(stream, filledView, done); + } +} +function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) { + const bytesFilled = pullIntoDescriptor.bytesFilled; + const elementSize = pullIntoDescriptor.elementSize; + return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize); +} +function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) { + controller._queue.push({ buffer, byteOffset, byteLength }); + controller._queueTotalSize += byteLength; +} +function ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, buffer, byteOffset, byteLength) { + let clonedChunk; + try { + clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength); + } + catch (cloneE) { + ReadableByteStreamControllerError(controller, cloneE); + throw cloneE; + } + ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength); +} +function ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstDescriptor) { + if (firstDescriptor.bytesFilled > 0) { + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, firstDescriptor.buffer, firstDescriptor.byteOffset, firstDescriptor.bytesFilled); + } + ReadableByteStreamControllerShiftPendingPullInto(controller); +} +function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) { + const maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled); + const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy; + let totalBytesToCopyRemaining = maxBytesToCopy; + let ready = false; + const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize; + const maxAlignedBytes = maxBytesFilled - remainderBytes; + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) { + totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled; + ready = true; + } + const queue = controller._queue; + while (totalBytesToCopyRemaining > 0) { + const headOfQueue = queue.peek(); + const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength); + const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy); + if (headOfQueue.byteLength === bytesToCopy) { + queue.shift(); + } + else { + headOfQueue.byteOffset += bytesToCopy; + headOfQueue.byteLength -= bytesToCopy; + } + controller._queueTotalSize -= bytesToCopy; + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor); + totalBytesToCopyRemaining -= bytesToCopy; + } + return ready; +} +function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) { + pullIntoDescriptor.bytesFilled += size; +} +function ReadableByteStreamControllerHandleQueueDrain(controller) { + if (controller._queueTotalSize === 0 && controller._closeRequested) { + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(controller._controlledReadableByteStream); + } + else { + ReadableByteStreamControllerCallPullIfNeeded(controller); + } +} +function ReadableByteStreamControllerInvalidateBYOBRequest(controller) { + if (controller._byobRequest === null) { + return; + } + controller._byobRequest._associatedReadableByteStreamController = undefined; + controller._byobRequest._view = null; + controller._byobRequest = null; +} +function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) { + while (controller._pendingPullIntos.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const pullIntoDescriptor = controller._pendingPullIntos.peek(); + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + } + } +} +function ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller) { + const reader = controller._controlledReadableByteStream._reader; + while (reader._readRequests.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const readRequest = reader._readRequests.shift(); + ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest); + } +} +function ReadableByteStreamControllerPullInto(controller, view, min, readIntoRequest) { + const stream = controller._controlledReadableByteStream; + const ctor = view.constructor; + const elementSize = arrayBufferViewElementSize(ctor); + const { byteOffset, byteLength } = view; + const minimumFill = min * elementSize; + let buffer; + try { + buffer = TransferArrayBuffer(view.buffer); + } + catch (e) { + readIntoRequest._errorSteps(e); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: buffer.byteLength, + byteOffset, + byteLength, + bytesFilled: 0, + minimumFill, + elementSize, + viewConstructor: ctor, + readerType: 'byob' + }; + if (controller._pendingPullIntos.length > 0) { + controller._pendingPullIntos.push(pullIntoDescriptor); + // No ReadableByteStreamControllerCallPullIfNeeded() call since: + // - No change happens on desiredSize + // - The source has already been notified of that there's at least 1 pending read(view) + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + return; + } + if (stream._state === 'closed') { + const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0); + readIntoRequest._closeSteps(emptyView); + return; + } + if (controller._queueTotalSize > 0) { + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + ReadableByteStreamControllerHandleQueueDrain(controller); + readIntoRequest._chunkSteps(filledView); + return; + } + if (controller._closeRequested) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + readIntoRequest._errorSteps(e); + return; + } + } + controller._pendingPullIntos.push(pullIntoDescriptor); + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) { + if (firstDescriptor.readerType === 'none') { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const stream = controller._controlledReadableByteStream; + if (ReadableStreamHasBYOBReader(stream)) { + while (ReadableStreamGetNumReadIntoRequests(stream) > 0) { + const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor); + } + } +} +function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) { + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + return; + } + if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) { + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + return; + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize; + if (remainderSize > 0) { + const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, pullIntoDescriptor.buffer, end - remainderSize, remainderSize); + } + pullIntoDescriptor.bytesFilled -= remainderSize; + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); +} +function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor); + } + else { + ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerShiftPendingPullInto(controller) { + const descriptor = controller._pendingPullIntos.shift(); + return descriptor; +} +function ReadableByteStreamControllerShouldCallPull(controller) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return false; + } + if (controller._closeRequested) { + return false; + } + if (!controller._started) { + return false; + } + if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; +} +function ReadableByteStreamControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; +} +// A client of ReadableByteStreamController may use these functions directly to bypass state check. +function ReadableByteStreamControllerClose(controller) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + if (controller._queueTotalSize > 0) { + controller._closeRequested = true; + return; + } + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + throw e; + } + } + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(stream); +} +function ReadableByteStreamControllerEnqueue(controller, chunk) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + const { buffer, byteOffset, byteLength } = chunk; + if (IsDetachedBuffer(buffer)) { + throw new TypeError('chunk\'s buffer is detached and so cannot be enqueued'); + } + const transferredBuffer = TransferArrayBuffer(buffer); + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (IsDetachedBuffer(firstPendingPullInto.buffer)) { + throw new TypeError('The BYOB request\'s buffer has been detached and so cannot be filled with an enqueued chunk'); + } + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer); + if (firstPendingPullInto.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto); + } + } + if (ReadableStreamHasDefaultReader(stream)) { + ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller); + if (ReadableStreamGetNumReadRequests(stream) === 0) { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + else { + if (controller._pendingPullIntos.length > 0) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength); + ReadableStreamFulfillReadRequest(stream, transferredView, false); + } + } + else if (ReadableStreamHasBYOBReader(stream)) { + // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully. + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + else { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerError(controller, e) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return; + } + ReadableByteStreamControllerClearPendingPullIntos(controller); + ResetQueue(controller); + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); +} +function ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest) { + const entry = controller._queue.shift(); + controller._queueTotalSize -= entry.byteLength; + ReadableByteStreamControllerHandleQueueDrain(controller); + const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength); + readRequest._chunkSteps(view); +} +function ReadableByteStreamControllerGetBYOBRequest(controller) { + if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled); + const byobRequest = Object.create(ReadableStreamBYOBRequest.prototype); + SetUpReadableStreamBYOBRequest(byobRequest, controller, view); + controller._byobRequest = byobRequest; + } + return controller._byobRequest; +} +function ReadableByteStreamControllerGetDesiredSize(controller) { + const state = controller._controlledReadableByteStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; +} +function ReadableByteStreamControllerRespond(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (bytesWritten !== 0) { + throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream'); + } + } + else { + if (bytesWritten === 0) { + throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream'); + } + if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) { + throw new RangeError('bytesWritten out of range'); + } + } + firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer); + ReadableByteStreamControllerRespondInternal(controller, bytesWritten); +} +function ReadableByteStreamControllerRespondWithNewView(controller, view) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (view.byteLength !== 0) { + throw new TypeError('The view\'s length must be 0 when calling respondWithNewView() on a closed stream'); + } + } + else { + if (view.byteLength === 0) { + throw new TypeError('The view\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'); + } + } + if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) { + throw new RangeError('The region specified by view does not match byobRequest'); + } + if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) { + throw new RangeError('The buffer of view has different capacity than byobRequest'); + } + if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) { + throw new RangeError('The region specified by view is larger than byobRequest'); + } + const viewByteLength = view.byteLength; + firstDescriptor.buffer = TransferArrayBuffer(view.buffer); + ReadableByteStreamControllerRespondInternal(controller, viewByteLength); +} +function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) { + controller._controlledReadableByteStream = stream; + controller._pullAgain = false; + controller._pulling = false; + controller._byobRequest = null; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._closeRequested = false; + controller._started = false; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._autoAllocateChunkSize = autoAllocateChunkSize; + controller._pendingPullIntos = new SimpleQueue(); + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableByteStreamControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableByteStreamControllerError(controller, r); + return null; + }); +} +function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) { + const controller = Object.create(ReadableByteStreamController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingByteSource.start !== undefined) { + startAlgorithm = () => underlyingByteSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingByteSource.pull !== undefined) { + pullAlgorithm = () => underlyingByteSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingByteSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingByteSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize; + if (autoAllocateChunkSize === 0) { + throw new TypeError('autoAllocateChunkSize must be greater than 0'); + } + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize); +} +function SetUpReadableStreamBYOBRequest(request, controller, view) { + request._associatedReadableByteStreamController = controller; + request._view = view; +} +// Helper functions for the ReadableStreamBYOBRequest. +function byobRequestBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`); +} +// Helper functions for the ReadableByteStreamController. +function byteStreamControllerBrandCheckException(name) { + return new TypeError(`ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`); +} + +function convertReaderOptions(options, context) { + assertDictionary(options, context); + const mode = options === null || options === void 0 ? void 0 : options.mode; + return { + mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`) + }; +} +function convertReadableStreamReaderMode(mode, context) { + mode = `${mode}`; + if (mode !== 'byob') { + throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`); + } + return mode; +} +function convertByobReadOptions(options, context) { + var _a; + assertDictionary(options, context); + const min = (_a = options === null || options === void 0 ? void 0 : options.min) !== null && _a !== void 0 ? _a : 1; + return { + min: convertUnsignedLongLongWithEnforceRange(min, `${context} has member 'min' that`) + }; +} + +// Abstract operations for the ReadableStream. +function AcquireReadableStreamBYOBReader(stream) { + return new ReadableStreamBYOBReader(stream); +} +// ReadableStream API exposed for controllers. +function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) { + stream._reader._readIntoRequests.push(readIntoRequest); +} +function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) { + const reader = stream._reader; + const readIntoRequest = reader._readIntoRequests.shift(); + if (done) { + readIntoRequest._closeSteps(chunk); + } + else { + readIntoRequest._chunkSteps(chunk); + } +} +function ReadableStreamGetNumReadIntoRequests(stream) { + return stream._reader._readIntoRequests.length; +} +function ReadableStreamHasBYOBReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamBYOBReader(reader)) { + return false; + } + return true; +} +/** + * A BYOB reader vended by a {@link ReadableStream}. + * + * @public + */ +class ReadableStreamBYOBReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + if (!IsReadableByteStreamController(stream._readableStreamController)) { + throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' + + 'source'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readIntoRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + read(view, rawOptions = {}) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('read')); + } + if (!ArrayBuffer.isView(view)) { + return promiseRejectedWith(new TypeError('view must be an array buffer view')); + } + if (view.byteLength === 0) { + return promiseRejectedWith(new TypeError('view must have non-zero byteLength')); + } + if (view.buffer.byteLength === 0) { + return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`)); + } + if (IsDetachedBuffer(view.buffer)) { + return promiseRejectedWith(new TypeError('view\'s buffer has been detached')); + } + let options; + try { + options = convertByobReadOptions(rawOptions, 'options'); + } + catch (e) { + return promiseRejectedWith(e); + } + const min = options.min; + if (min === 0) { + return promiseRejectedWith(new TypeError('options.min must be greater than 0')); + } + if (!isDataView(view)) { + if (min > view.length) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s length')); + } + } + else if (min > view.byteLength) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s byteLength')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readIntoRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: chunk => resolvePromise({ value: chunk, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamBYOBReader(this)) { + throw byobReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamBYOBReaderRelease(this); + } +} +Object.defineProperties(ReadableStreamBYOBReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } +}); +setFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel'); +setFunctionName(ReadableStreamBYOBReader.prototype.read, 'read'); +setFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBReader', + configurable: true + }); +} +// Abstract operations for the readers. +function IsReadableStreamBYOBReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) { + return false; + } + return x instanceof ReadableStreamBYOBReader; +} +function ReadableStreamBYOBReaderRead(reader, view, min, readIntoRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'errored') { + readIntoRequest._errorSteps(stream._storedError); + } + else { + ReadableByteStreamControllerPullInto(stream._readableStreamController, view, min, readIntoRequest); + } +} +function ReadableStreamBYOBReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); +} +function ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._errorSteps(e); + }); +} +// Helper functions for the ReadableStreamBYOBReader. +function byobReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`); +} + +function ExtractHighWaterMark(strategy, defaultHWM) { + const { highWaterMark } = strategy; + if (highWaterMark === undefined) { + return defaultHWM; + } + if (NumberIsNaN(highWaterMark) || highWaterMark < 0) { + throw new RangeError('Invalid highWaterMark'); + } + return highWaterMark; +} +function ExtractSizeAlgorithm(strategy) { + const { size } = strategy; + if (!size) { + return () => 1; + } + return size; +} + +function convertQueuingStrategy(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + const size = init === null || init === void 0 ? void 0 : init.size; + return { + highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark), + size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`) + }; +} +function convertQueuingStrategySize(fn, context) { + assertFunction(fn, context); + return chunk => convertUnrestrictedDouble(fn(chunk)); +} + +function convertUnderlyingSink(original, context) { + assertDictionary(original, context); + const abort = original === null || original === void 0 ? void 0 : original.abort; + const close = original === null || original === void 0 ? void 0 : original.close; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + const write = original === null || original === void 0 ? void 0 : original.write; + return { + abort: abort === undefined ? + undefined : + convertUnderlyingSinkAbortCallback(abort, original, `${context} has member 'abort' that`), + close: close === undefined ? + undefined : + convertUnderlyingSinkCloseCallback(close, original, `${context} has member 'close' that`), + start: start === undefined ? + undefined : + convertUnderlyingSinkStartCallback(start, original, `${context} has member 'start' that`), + write: write === undefined ? + undefined : + convertUnderlyingSinkWriteCallback(write, original, `${context} has member 'write' that`), + type + }; +} +function convertUnderlyingSinkAbortCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); +} +function convertUnderlyingSinkCloseCallback(fn, original, context) { + assertFunction(fn, context); + return () => promiseCall(fn, original, []); +} +function convertUnderlyingSinkStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); +} +function convertUnderlyingSinkWriteCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); +} + +function assertWritableStream(x, context) { + if (!IsWritableStream(x)) { + throw new TypeError(`${context} is not a WritableStream.`); + } +} + +function isAbortSignal(value) { + if (typeof value !== 'object' || value === null) { + return false; + } + try { + return typeof value.aborted === 'boolean'; + } + catch (_a) { + // AbortSignal.prototype.aborted throws if its brand check fails + return false; + } +} +const supportsAbortController = typeof AbortController === 'function'; +/** + * Construct a new AbortController, if supported by the platform. + * + * @internal + */ +function createAbortController() { + if (supportsAbortController) { + return new AbortController(); + } + return undefined; +} + +/** + * A writable stream represents a destination for data, into which you can write. + * + * @public + */ +class WritableStream { + constructor(rawUnderlyingSink = {}, rawStrategy = {}) { + if (rawUnderlyingSink === undefined) { + rawUnderlyingSink = null; + } + else { + assertObject(rawUnderlyingSink, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter'); + InitializeWritableStream(this); + const type = underlyingSink.type; + if (type !== undefined) { + throw new RangeError('Invalid type is specified'); + } + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm); + } + /** + * Returns whether or not the writable stream is locked to a writer. + */ + get locked() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('locked'); + } + return IsWritableStreamLocked(this); + } + /** + * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be + * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort + * mechanism of the underlying sink. + * + * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled + * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel + * the stream) if the stream is currently locked. + */ + abort(reason = undefined) { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('abort')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer')); + } + return WritableStreamAbort(this, reason); + } + /** + * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its + * close behavior. During this time any further attempts to write will fail (without erroring the stream). + * + * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream + * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with + * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked. + */ + close() { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('close')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer')); + } + if (WritableStreamCloseQueuedOrInFlight(this)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamClose(this); + } + /** + * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream + * is locked, no other writer can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to write to a stream + * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at + * the same time, which would cause the resulting written data to be unpredictable and probably useless. + */ + getWriter() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('getWriter'); + } + return AcquireWritableStreamDefaultWriter(this); + } +} +Object.defineProperties(WritableStream.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + getWriter: { enumerable: true }, + locked: { enumerable: true } +}); +setFunctionName(WritableStream.prototype.abort, 'abort'); +setFunctionName(WritableStream.prototype.close, 'close'); +setFunctionName(WritableStream.prototype.getWriter, 'getWriter'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, { + value: 'WritableStream', + configurable: true + }); +} +// Abstract operations for the WritableStream. +function AcquireWritableStreamDefaultWriter(stream) { + return new WritableStreamDefaultWriter(stream); +} +// Throws if and only if startAlgorithm throws. +function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(WritableStream.prototype); + InitializeWritableStream(stream); + const controller = Object.create(WritableStreamDefaultController.prototype); + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + return stream; +} +function InitializeWritableStream(stream) { + stream._state = 'writable'; + // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is + // 'erroring' or 'errored'. May be set to an undefined value. + stream._storedError = undefined; + stream._writer = undefined; + // Initialize to undefined first because the constructor of the controller checks this + // variable to validate the caller. + stream._writableStreamController = undefined; + // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data + // producer without waiting for the queued writes to finish. + stream._writeRequests = new SimpleQueue(); + // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents + // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here. + stream._inFlightWriteRequest = undefined; + // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer + // has been detached. + stream._closeRequest = undefined; + // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it + // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here. + stream._inFlightCloseRequest = undefined; + // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached. + stream._pendingAbortRequest = undefined; + // The backpressure signal set by the controller. + stream._backpressure = false; +} +function IsWritableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) { + return false; + } + return x instanceof WritableStream; +} +function IsWritableStreamLocked(stream) { + if (stream._writer === undefined) { + return false; + } + return true; +} +function WritableStreamAbort(stream, reason) { + var _a; + if (stream._state === 'closed' || stream._state === 'errored') { + return promiseResolvedWith(undefined); + } + stream._writableStreamController._abortReason = reason; + (_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort(reason); + // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring', + // but it doesn't know that signaling abort runs author code that might have changed the state. + // Widen the type again by casting to WritableStreamState. + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseResolvedWith(undefined); + } + if (stream._pendingAbortRequest !== undefined) { + return stream._pendingAbortRequest._promise; + } + let wasAlreadyErroring = false; + if (state === 'erroring') { + wasAlreadyErroring = true; + // reason will not be used, so don't keep a reference to it. + reason = undefined; + } + const promise = newPromise((resolve, reject) => { + stream._pendingAbortRequest = { + _promise: undefined, + _resolve: resolve, + _reject: reject, + _reason: reason, + _wasAlreadyErroring: wasAlreadyErroring + }; + }); + stream._pendingAbortRequest._promise = promise; + if (!wasAlreadyErroring) { + WritableStreamStartErroring(stream, reason); + } + return promise; +} +function WritableStreamClose(stream) { + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseRejectedWith(new TypeError(`The stream (in ${state} state) is not in the writable state and cannot be closed`)); + } + const promise = newPromise((resolve, reject) => { + const closeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._closeRequest = closeRequest; + }); + const writer = stream._writer; + if (writer !== undefined && stream._backpressure && state === 'writable') { + defaultWriterReadyPromiseResolve(writer); + } + WritableStreamDefaultControllerClose(stream._writableStreamController); + return promise; +} +// WritableStream API exposed for controllers. +function WritableStreamAddWriteRequest(stream) { + const promise = newPromise((resolve, reject) => { + const writeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._writeRequests.push(writeRequest); + }); + return promise; +} +function WritableStreamDealWithRejection(stream, error) { + const state = stream._state; + if (state === 'writable') { + WritableStreamStartErroring(stream, error); + return; + } + WritableStreamFinishErroring(stream); +} +function WritableStreamStartErroring(stream, reason) { + const controller = stream._writableStreamController; + stream._state = 'erroring'; + stream._storedError = reason; + const writer = stream._writer; + if (writer !== undefined) { + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason); + } + if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) { + WritableStreamFinishErroring(stream); + } +} +function WritableStreamFinishErroring(stream) { + stream._state = 'errored'; + stream._writableStreamController[ErrorSteps](); + const storedError = stream._storedError; + stream._writeRequests.forEach(writeRequest => { + writeRequest._reject(storedError); + }); + stream._writeRequests = new SimpleQueue(); + if (stream._pendingAbortRequest === undefined) { + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const abortRequest = stream._pendingAbortRequest; + stream._pendingAbortRequest = undefined; + if (abortRequest._wasAlreadyErroring) { + abortRequest._reject(storedError); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const promise = stream._writableStreamController[AbortSteps](abortRequest._reason); + uponPromise(promise, () => { + abortRequest._resolve(); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }, (reason) => { + abortRequest._reject(reason); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }); +} +function WritableStreamFinishInFlightWrite(stream) { + stream._inFlightWriteRequest._resolve(undefined); + stream._inFlightWriteRequest = undefined; +} +function WritableStreamFinishInFlightWriteWithError(stream, error) { + stream._inFlightWriteRequest._reject(error); + stream._inFlightWriteRequest = undefined; + WritableStreamDealWithRejection(stream, error); +} +function WritableStreamFinishInFlightClose(stream) { + stream._inFlightCloseRequest._resolve(undefined); + stream._inFlightCloseRequest = undefined; + const state = stream._state; + if (state === 'erroring') { + // The error was too late to do anything, so it is ignored. + stream._storedError = undefined; + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._resolve(); + stream._pendingAbortRequest = undefined; + } + } + stream._state = 'closed'; + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseResolve(writer); + } +} +function WritableStreamFinishInFlightCloseWithError(stream, error) { + stream._inFlightCloseRequest._reject(error); + stream._inFlightCloseRequest = undefined; + // Never execute sink abort() after sink close(). + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._reject(error); + stream._pendingAbortRequest = undefined; + } + WritableStreamDealWithRejection(stream, error); +} +// TODO(ricea): Fix alphabetical order. +function WritableStreamCloseQueuedOrInFlight(stream) { + if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; +} +function WritableStreamHasOperationMarkedInFlight(stream) { + if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; +} +function WritableStreamMarkCloseRequestInFlight(stream) { + stream._inFlightCloseRequest = stream._closeRequest; + stream._closeRequest = undefined; +} +function WritableStreamMarkFirstWriteRequestInFlight(stream) { + stream._inFlightWriteRequest = stream._writeRequests.shift(); +} +function WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) { + if (stream._closeRequest !== undefined) { + stream._closeRequest._reject(stream._storedError); + stream._closeRequest = undefined; + } + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseReject(writer, stream._storedError); + } +} +function WritableStreamUpdateBackpressure(stream, backpressure) { + const writer = stream._writer; + if (writer !== undefined && backpressure !== stream._backpressure) { + if (backpressure) { + defaultWriterReadyPromiseReset(writer); + } + else { + defaultWriterReadyPromiseResolve(writer); + } + } + stream._backpressure = backpressure; +} +/** + * A default writer vended by a {@link WritableStream}. + * + * @public + */ +class WritableStreamDefaultWriter { + constructor(stream) { + assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter'); + assertWritableStream(stream, 'First parameter'); + if (IsWritableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive writing by another writer'); + } + this._ownerWritableStream = stream; + stream._writer = this; + const state = stream._state; + if (state === 'writable') { + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) { + defaultWriterReadyPromiseInitialize(this); + } + else { + defaultWriterReadyPromiseInitializeAsResolved(this); + } + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'erroring') { + defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError); + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'closed') { + defaultWriterReadyPromiseInitializeAsResolved(this); + defaultWriterClosedPromiseInitializeAsResolved(this); + } + else { + const storedError = stream._storedError; + defaultWriterReadyPromiseInitializeAsRejected(this, storedError); + defaultWriterClosedPromiseInitializeAsRejected(this, storedError); + } + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the writer’s lock is released before the stream finishes closing. + */ + get closed() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full. + * A producer can use this information to determine the right amount of data to write. + * + * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort + * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when + * the writer’s lock is released. + */ + get desiredSize() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('desiredSize'); + } + if (this._ownerWritableStream === undefined) { + throw defaultWriterLockException('desiredSize'); + } + return WritableStreamDefaultWriterGetDesiredSize(this); + } + /** + * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions + * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips + * back to zero or below, the getter will return a new promise that stays pending until the next transition. + * + * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become + * rejected. + */ + get ready() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('ready')); + } + return this._readyPromise; + } + /** + * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}. + */ + abort(reason = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('abort')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('abort')); + } + return WritableStreamDefaultWriterAbort(this, reason); + } + /** + * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}. + */ + close() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('close')); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return promiseRejectedWith(defaultWriterLockException('close')); + } + if (WritableStreamCloseQueuedOrInFlight(stream)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamDefaultWriterClose(this); + } + /** + * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active. + * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from + * now on; otherwise, the writer will appear closed. + * + * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the + * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled). + * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents + * other producers from writing in an interleaved manner. + */ + releaseLock() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('releaseLock'); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return; + } + WritableStreamDefaultWriterRelease(this); + } + write(chunk = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('write')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + return WritableStreamDefaultWriterWrite(this, chunk); + } +} +Object.defineProperties(WritableStreamDefaultWriter.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + releaseLock: { enumerable: true }, + write: { enumerable: true }, + closed: { enumerable: true }, + desiredSize: { enumerable: true }, + ready: { enumerable: true } +}); +setFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort'); +setFunctionName(WritableStreamDefaultWriter.prototype.close, 'close'); +setFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock'); +setFunctionName(WritableStreamDefaultWriter.prototype.write, 'write'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultWriter', + configurable: true + }); +} +// Abstract operations for the WritableStreamDefaultWriter. +function IsWritableStreamDefaultWriter(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultWriter; +} +// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check. +function WritableStreamDefaultWriterAbort(writer, reason) { + const stream = writer._ownerWritableStream; + return WritableStreamAbort(stream, reason); +} +function WritableStreamDefaultWriterClose(writer) { + const stream = writer._ownerWritableStream; + return WritableStreamClose(stream); +} +function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseResolvedWith(undefined); + } + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + return WritableStreamDefaultWriterClose(writer); +} +function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) { + if (writer._closedPromiseState === 'pending') { + defaultWriterClosedPromiseReject(writer, error); + } + else { + defaultWriterClosedPromiseResetToRejected(writer, error); + } +} +function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) { + if (writer._readyPromiseState === 'pending') { + defaultWriterReadyPromiseReject(writer, error); + } + else { + defaultWriterReadyPromiseResetToRejected(writer, error); + } +} +function WritableStreamDefaultWriterGetDesiredSize(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (state === 'errored' || state === 'erroring') { + return null; + } + if (state === 'closed') { + return 0; + } + return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController); +} +function WritableStreamDefaultWriterRelease(writer) { + const stream = writer._ownerWritableStream; + const releasedError = new TypeError(`Writer was released and can no longer be used to monitor the stream's closedness`); + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError); + // The state transitions to "errored" before the sink abort() method runs, but the writer.closed promise is not + // rejected until afterwards. This means that simply testing state will not work. + WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError); + stream._writer = undefined; + writer._ownerWritableStream = undefined; +} +function WritableStreamDefaultWriterWrite(writer, chunk) { + const stream = writer._ownerWritableStream; + const controller = stream._writableStreamController; + const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk); + if (stream !== writer._ownerWritableStream) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + const state = stream._state; + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to')); + } + if (state === 'erroring') { + return promiseRejectedWith(stream._storedError); + } + const promise = WritableStreamAddWriteRequest(stream); + WritableStreamDefaultControllerWrite(controller, chunk, chunkSize); + return promise; +} +const closeSentinel = {}; +/** + * Allows control of a {@link WritableStream | writable stream}'s state and internal queue. + * + * @public + */ +class WritableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted. + * + * @deprecated + * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177. + * Use {@link WritableStreamDefaultController.signal}'s `reason` instead. + */ + get abortReason() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('abortReason'); + } + return this._abortReason; + } + /** + * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted. + */ + get signal() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('signal'); + } + if (this._abortController === undefined) { + // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`. + // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill, + // so instead we only implement support for `signal` if we find a global `AbortController` constructor. + throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported'); + } + return this._abortController.signal; + } + /** + * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`. + * + * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying + * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the + * normal lifecycle of interactions with the underlying sink. + */ + error(e = undefined) { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('error'); + } + const state = this._controlledWritableStream._state; + if (state !== 'writable') { + // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so + // just treat it as a no-op. + return; + } + WritableStreamDefaultControllerError(this, e); + } + /** @internal */ + [AbortSteps](reason) { + const result = this._abortAlgorithm(reason); + WritableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [ErrorSteps]() { + ResetQueue(this); + } +} +Object.defineProperties(WritableStreamDefaultController.prototype, { + abortReason: { enumerable: true }, + signal: { enumerable: true }, + error: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultController', + configurable: true + }); +} +// Abstract operations implementing interface required by the WritableStream. +function IsWritableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultController; +} +function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledWritableStream = stream; + stream._writableStreamController = controller; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._abortReason = undefined; + controller._abortController = createAbortController(); + controller._started = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._writeAlgorithm = writeAlgorithm; + controller._closeAlgorithm = closeAlgorithm; + controller._abortAlgorithm = abortAlgorithm; + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + const startResult = startAlgorithm(); + const startPromise = promiseResolvedWith(startResult); + uponPromise(startPromise, () => { + controller._started = true; + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, r => { + controller._started = true; + WritableStreamDealWithRejection(stream, r); + return null; + }); +} +function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) { + const controller = Object.create(WritableStreamDefaultController.prototype); + let startAlgorithm; + let writeAlgorithm; + let closeAlgorithm; + let abortAlgorithm; + if (underlyingSink.start !== undefined) { + startAlgorithm = () => underlyingSink.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSink.write !== undefined) { + writeAlgorithm = chunk => underlyingSink.write(chunk, controller); + } + else { + writeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.close !== undefined) { + closeAlgorithm = () => underlyingSink.close(); + } + else { + closeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.abort !== undefined) { + abortAlgorithm = reason => underlyingSink.abort(reason); + } + else { + abortAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); +} +// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls. +function WritableStreamDefaultControllerClearAlgorithms(controller) { + controller._writeAlgorithm = undefined; + controller._closeAlgorithm = undefined; + controller._abortAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; +} +function WritableStreamDefaultControllerClose(controller) { + EnqueueValueWithSize(controller, closeSentinel, 0); + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); +} +function WritableStreamDefaultControllerGetChunkSize(controller, chunk) { + try { + return controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE); + return 1; + } +} +function WritableStreamDefaultControllerGetDesiredSize(controller) { + return controller._strategyHWM - controller._queueTotalSize; +} +function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) { + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE); + return; + } + const stream = controller._controlledWritableStream; + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); +} +// Abstract operations for the WritableStreamDefaultController. +function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) { + const stream = controller._controlledWritableStream; + if (!controller._started) { + return; + } + if (stream._inFlightWriteRequest !== undefined) { + return; + } + const state = stream._state; + if (state === 'erroring') { + WritableStreamFinishErroring(stream); + return; + } + if (controller._queue.length === 0) { + return; + } + const value = PeekQueueValue(controller); + if (value === closeSentinel) { + WritableStreamDefaultControllerProcessClose(controller); + } + else { + WritableStreamDefaultControllerProcessWrite(controller, value); + } +} +function WritableStreamDefaultControllerErrorIfNeeded(controller, error) { + if (controller._controlledWritableStream._state === 'writable') { + WritableStreamDefaultControllerError(controller, error); + } +} +function WritableStreamDefaultControllerProcessClose(controller) { + const stream = controller._controlledWritableStream; + WritableStreamMarkCloseRequestInFlight(stream); + DequeueValue(controller); + const sinkClosePromise = controller._closeAlgorithm(); + WritableStreamDefaultControllerClearAlgorithms(controller); + uponPromise(sinkClosePromise, () => { + WritableStreamFinishInFlightClose(stream); + return null; + }, reason => { + WritableStreamFinishInFlightCloseWithError(stream, reason); + return null; + }); +} +function WritableStreamDefaultControllerProcessWrite(controller, chunk) { + const stream = controller._controlledWritableStream; + WritableStreamMarkFirstWriteRequestInFlight(stream); + const sinkWritePromise = controller._writeAlgorithm(chunk); + uponPromise(sinkWritePromise, () => { + WritableStreamFinishInFlightWrite(stream); + const state = stream._state; + DequeueValue(controller); + if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, reason => { + if (stream._state === 'writable') { + WritableStreamDefaultControllerClearAlgorithms(controller); + } + WritableStreamFinishInFlightWriteWithError(stream, reason); + return null; + }); +} +function WritableStreamDefaultControllerGetBackpressure(controller) { + const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller); + return desiredSize <= 0; +} +// A client of WritableStreamDefaultController may use these functions directly to bypass state check. +function WritableStreamDefaultControllerError(controller, error) { + const stream = controller._controlledWritableStream; + WritableStreamDefaultControllerClearAlgorithms(controller); + WritableStreamStartErroring(stream, error); +} +// Helper functions for the WritableStream. +function streamBrandCheckException$2(name) { + return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`); +} +// Helper functions for the WritableStreamDefaultController. +function defaultControllerBrandCheckException$2(name) { + return new TypeError(`WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`); +} +// Helper functions for the WritableStreamDefaultWriter. +function defaultWriterBrandCheckException(name) { + return new TypeError(`WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`); +} +function defaultWriterLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released writer'); +} +function defaultWriterClosedPromiseInitialize(writer) { + writer._closedPromise = newPromise((resolve, reject) => { + writer._closedPromise_resolve = resolve; + writer._closedPromise_reject = reject; + writer._closedPromiseState = 'pending'; + }); +} +function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseReject(writer, reason); +} +function defaultWriterClosedPromiseInitializeAsResolved(writer) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseResolve(writer); +} +function defaultWriterClosedPromiseReject(writer, reason) { + if (writer._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._closedPromise); + writer._closedPromise_reject(reason); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'rejected'; +} +function defaultWriterClosedPromiseResetToRejected(writer, reason) { + defaultWriterClosedPromiseInitializeAsRejected(writer, reason); +} +function defaultWriterClosedPromiseResolve(writer) { + if (writer._closedPromise_resolve === undefined) { + return; + } + writer._closedPromise_resolve(undefined); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'resolved'; +} +function defaultWriterReadyPromiseInitialize(writer) { + writer._readyPromise = newPromise((resolve, reject) => { + writer._readyPromise_resolve = resolve; + writer._readyPromise_reject = reject; + }); + writer._readyPromiseState = 'pending'; +} +function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseReject(writer, reason); +} +function defaultWriterReadyPromiseInitializeAsResolved(writer) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseResolve(writer); +} +function defaultWriterReadyPromiseReject(writer, reason) { + if (writer._readyPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._readyPromise); + writer._readyPromise_reject(reason); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'rejected'; +} +function defaultWriterReadyPromiseReset(writer) { + defaultWriterReadyPromiseInitialize(writer); +} +function defaultWriterReadyPromiseResetToRejected(writer, reason) { + defaultWriterReadyPromiseInitializeAsRejected(writer, reason); +} +function defaultWriterReadyPromiseResolve(writer) { + if (writer._readyPromise_resolve === undefined) { + return; + } + writer._readyPromise_resolve(undefined); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'fulfilled'; +} + +/// +function getGlobals() { + if (typeof globalThis !== 'undefined') { + return globalThis; + } + else if (typeof self !== 'undefined') { + return self; + } + else if (typeof global !== 'undefined') { + return global; + } + return undefined; +} +const globals = getGlobals(); + +/// +function isDOMExceptionConstructor(ctor) { + if (!(typeof ctor === 'function' || typeof ctor === 'object')) { + return false; + } + if (ctor.name !== 'DOMException') { + return false; + } + try { + new ctor(); + return true; + } + catch (_a) { + return false; + } +} +/** + * Support: + * - Web browsers + * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87) + */ +function getFromGlobal() { + const ctor = globals === null || globals === void 0 ? void 0 : globals.DOMException; + return isDOMExceptionConstructor(ctor) ? ctor : undefined; +} +/** + * Support: + * - All platforms + */ +function createPolyfill() { + // eslint-disable-next-line @typescript-eslint/no-shadow + const ctor = function DOMException(message, name) { + this.message = message || ''; + this.name = name || 'Error'; + if (Error.captureStackTrace) { + Error.captureStackTrace(this, this.constructor); + } + }; + setFunctionName(ctor, 'DOMException'); + ctor.prototype = Object.create(Error.prototype); + Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true }); + return ctor; +} +// eslint-disable-next-line @typescript-eslint/no-redeclare +const DOMException = getFromGlobal() || createPolyfill(); + +function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) { + const reader = AcquireReadableStreamDefaultReader(source); + const writer = AcquireWritableStreamDefaultWriter(dest); + source._disturbed = true; + let shuttingDown = false; + // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown. + let currentWrite = promiseResolvedWith(undefined); + return newPromise((resolve, reject) => { + let abortAlgorithm; + if (signal !== undefined) { + abortAlgorithm = () => { + const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError'); + const actions = []; + if (!preventAbort) { + actions.push(() => { + if (dest._state === 'writable') { + return WritableStreamAbort(dest, error); + } + return promiseResolvedWith(undefined); + }); + } + if (!preventCancel) { + actions.push(() => { + if (source._state === 'readable') { + return ReadableStreamCancel(source, error); + } + return promiseResolvedWith(undefined); + }); + } + shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error); + }; + if (signal.aborted) { + abortAlgorithm(); + return; + } + signal.addEventListener('abort', abortAlgorithm); + } + // Using reader and writer, read all chunks from this and write them to dest + // - Backpressure must be enforced + // - Shutdown must stop all activity + function pipeLoop() { + return newPromise((resolveLoop, rejectLoop) => { + function next(done) { + if (done) { + resolveLoop(); + } + else { + // Use `PerformPromiseThen` instead of `uponPromise` to avoid + // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers + PerformPromiseThen(pipeStep(), next, rejectLoop); + } + } + next(false); + }); + } + function pipeStep() { + if (shuttingDown) { + return promiseResolvedWith(true); + } + return PerformPromiseThen(writer._readyPromise, () => { + return newPromise((resolveRead, rejectRead) => { + ReadableStreamDefaultReaderRead(reader, { + _chunkSteps: chunk => { + currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop); + resolveRead(false); + }, + _closeSteps: () => resolveRead(true), + _errorSteps: rejectRead + }); + }); + }); + } + // Errors must be propagated forward + isOrBecomesErrored(source, reader._closedPromise, storedError => { + if (!preventAbort) { + shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Errors must be propagated backward + isOrBecomesErrored(dest, writer._closedPromise, storedError => { + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Closing must be propagated forward + isOrBecomesClosed(source, reader._closedPromise, () => { + if (!preventClose) { + shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer)); + } + else { + shutdown(); + } + return null; + }); + // Closing must be propagated backward + if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') { + const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it'); + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed); + } + else { + shutdown(true, destClosed); + } + } + setPromiseIsHandledToTrue(pipeLoop()); + function waitForWritesToFinish() { + // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait + // for that too. + const oldCurrentWrite = currentWrite; + return PerformPromiseThen(currentWrite, () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined); + } + function isOrBecomesErrored(stream, promise, action) { + if (stream._state === 'errored') { + action(stream._storedError); + } + else { + uponRejection(promise, action); + } + } + function isOrBecomesClosed(stream, promise, action) { + if (stream._state === 'closed') { + action(); + } + else { + uponFulfillment(promise, action); + } + } + function shutdownWithAction(action, originalIsError, originalError) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), doTheRest); + } + else { + doTheRest(); + } + function doTheRest() { + uponPromise(action(), () => finalize(originalIsError, originalError), newError => finalize(true, newError)); + return null; + } + } + function shutdown(isError, error) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error)); + } + else { + finalize(isError, error); + } + } + function finalize(isError, error) { + WritableStreamDefaultWriterRelease(writer); + ReadableStreamReaderGenericRelease(reader); + if (signal !== undefined) { + signal.removeEventListener('abort', abortAlgorithm); + } + if (isError) { + reject(error); + } + else { + resolve(undefined); + } + return null; + } + }); +} + +/** + * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue. + * + * @public + */ +class ReadableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('desiredSize'); + } + return ReadableStreamDefaultControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('close'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits close'); + } + ReadableStreamDefaultControllerClose(this); + } + enqueue(chunk = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('enqueue'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits enqueue'); + } + return ReadableStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('error'); + } + ReadableStreamDefaultControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableStream; + if (this._queue.length > 0) { + const chunk = DequeueValue(this); + if (this._closeRequested && this._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(this); + ReadableStreamClose(stream); + } + else { + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + readRequest._chunkSteps(chunk); + } + else { + ReadableStreamAddReadRequest(stream, readRequest); + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + } + /** @internal */ + [ReleaseSteps]() { + // Do nothing. + } +} +Object.defineProperties(ReadableStreamDefaultController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(ReadableStreamDefaultController.prototype.close, 'close'); +setFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue'); +setFunctionName(ReadableStreamDefaultController.prototype.error, 'error'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultController', + configurable: true + }); +} +// Abstract operations for the ReadableStreamDefaultController. +function IsReadableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) { + return false; + } + return x instanceof ReadableStreamDefaultController; +} +function ReadableStreamDefaultControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableStreamDefaultControllerError(controller, e); + return null; + }); +} +function ReadableStreamDefaultControllerShouldCallPull(controller) { + const stream = controller._controlledReadableStream; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return false; + } + if (!controller._started) { + return false; + } + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; +} +function ReadableStreamDefaultControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; +} +// A client of ReadableStreamDefaultController may use these functions directly to bypass state check. +function ReadableStreamDefaultControllerClose(controller) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + controller._closeRequested = true; + if (controller._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } +} +function ReadableStreamDefaultControllerEnqueue(controller, chunk) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + ReadableStreamFulfillReadRequest(stream, chunk, false); + } + else { + let chunkSize; + try { + chunkSize = controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + ReadableStreamDefaultControllerError(controller, chunkSizeE); + throw chunkSizeE; + } + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + ReadableStreamDefaultControllerError(controller, enqueueE); + throw enqueueE; + } + } + ReadableStreamDefaultControllerCallPullIfNeeded(controller); +} +function ReadableStreamDefaultControllerError(controller, e) { + const stream = controller._controlledReadableStream; + if (stream._state !== 'readable') { + return; + } + ResetQueue(controller); + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); +} +function ReadableStreamDefaultControllerGetDesiredSize(controller) { + const state = controller._controlledReadableStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; +} +// This is used in the implementation of TransformStream. +function ReadableStreamDefaultControllerHasBackpressure(controller) { + if (ReadableStreamDefaultControllerShouldCallPull(controller)) { + return false; + } + return true; +} +function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) { + const state = controller._controlledReadableStream._state; + if (!controller._closeRequested && state === 'readable') { + return true; + } + return false; +} +function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledReadableStream = stream; + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._started = false; + controller._closeRequested = false; + controller._pullAgain = false; + controller._pulling = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableStreamDefaultControllerError(controller, r); + return null; + }); +} +function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) { + const controller = Object.create(ReadableStreamDefaultController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingSource.start !== undefined) { + startAlgorithm = () => underlyingSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSource.pull !== undefined) { + pullAlgorithm = () => underlyingSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); +} +// Helper functions for the ReadableStreamDefaultController. +function defaultControllerBrandCheckException$1(name) { + return new TypeError(`ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`); +} + +function ReadableStreamTee(stream, cloneForBranch2) { + if (IsReadableByteStreamController(stream._readableStreamController)) { + return ReadableByteStreamTee(stream); + } + return ReadableStreamDefaultTee(stream); +} +function ReadableStreamDefaultTee(stream, cloneForBranch2) { + const reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgain = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function pullAlgorithm() { + if (reading) { + readAgain = true; + return promiseResolvedWith(undefined); + } + reading = true; + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgain = false; + const chunk1 = chunk; + const chunk2 = chunk; + // There is no way to access the cloning code right now in the reference implementation. + // If we add one then we'll need an implementation for serializable objects. + // if (!canceled2 && cloneForBranch2) { + // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2)); + // } + if (!canceled1) { + ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgain) { + pullAlgorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableStreamDefaultControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableStreamDefaultControllerClose(branch2._readableStreamController); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + // do nothing + } + branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm); + branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm); + uponRejection(reader._closedPromise, (r) => { + ReadableStreamDefaultControllerError(branch1._readableStreamController, r); + ReadableStreamDefaultControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + return [branch1, branch2]; +} +function ReadableByteStreamTee(stream) { + let reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgainForBranch1 = false; + let readAgainForBranch2 = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function forwardReaderError(thisReader) { + uponRejection(thisReader._closedPromise, r => { + if (thisReader !== reader) { + return null; + } + ReadableByteStreamControllerError(branch1._readableStreamController, r); + ReadableByteStreamControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + } + function pullWithDefaultReader() { + if (IsReadableStreamBYOBReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamDefaultReader(stream); + forwardReaderError(reader); + } + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const chunk1 = chunk; + let chunk2 = chunk; + if (!canceled1 && !canceled2) { + try { + chunk2 = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(branch1._readableStreamController, cloneE); + ReadableByteStreamControllerError(branch2._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + } + if (!canceled1) { + ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableByteStreamControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableByteStreamControllerClose(branch2._readableStreamController); + } + if (branch1._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch1._readableStreamController, 0); + } + if (branch2._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch2._readableStreamController, 0); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + } + function pullWithBYOBReader(view, forBranch2) { + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamBYOBReader(stream); + forwardReaderError(reader); + } + const byobBranch = forBranch2 ? branch2 : branch1; + const otherBranch = forBranch2 ? branch1 : branch2; + const readIntoRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!otherCanceled) { + let clonedChunk; + try { + clonedChunk = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE); + ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk); + } + else if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: chunk => { + reading = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!byobCanceled) { + ReadableByteStreamControllerClose(byobBranch._readableStreamController); + } + if (!otherCanceled) { + ReadableByteStreamControllerClose(otherBranch._readableStreamController); + } + if (chunk !== undefined) { + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0); + } + } + if (!byobCanceled || !otherCanceled) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest); + } + function pull1Algorithm() { + if (reading) { + readAgainForBranch1 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, false); + } + return promiseResolvedWith(undefined); + } + function pull2Algorithm() { + if (reading) { + readAgainForBranch2 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, true); + } + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + return; + } + branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm); + branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm); + forwardReaderError(reader); + return [branch1, branch2]; +} + +function isReadableStreamLike(stream) { + return typeIsObject(stream) && typeof stream.getReader !== 'undefined'; +} + +function ReadableStreamFrom(source) { + if (isReadableStreamLike(source)) { + return ReadableStreamFromDefaultReader(source.getReader()); + } + return ReadableStreamFromIterable(source); +} +function ReadableStreamFromIterable(asyncIterable) { + let stream; + const iteratorRecord = GetIterator(asyncIterable, 'async'); + const startAlgorithm = noop; + function pullAlgorithm() { + let nextResult; + try { + nextResult = IteratorNext(iteratorRecord); + } + catch (e) { + return promiseRejectedWith(e); + } + const nextPromise = promiseResolvedWith(nextResult); + return transformPromiseWith(nextPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object'); + } + const done = IteratorComplete(iterResult); + if (done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = IteratorValue(iterResult); + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + const iterator = iteratorRecord.iterator; + let returnMethod; + try { + returnMethod = GetMethod(iterator, 'return'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (returnMethod === undefined) { + return promiseResolvedWith(undefined); + } + let returnResult; + try { + returnResult = reflectCall(returnMethod, iterator, [reason]); + } + catch (e) { + return promiseRejectedWith(e); + } + const returnPromise = promiseResolvedWith(returnResult); + return transformPromiseWith(returnPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object'); + } + return undefined; + }); + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; +} +function ReadableStreamFromDefaultReader(reader) { + let stream; + const startAlgorithm = noop; + function pullAlgorithm() { + let readPromise; + try { + readPromise = reader.read(); + } + catch (e) { + return promiseRejectedWith(e); + } + return transformPromiseWith(readPromise, readResult => { + if (!typeIsObject(readResult)) { + throw new TypeError('The promise returned by the reader.read() method must fulfill with an object'); + } + if (readResult.done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = readResult.value; + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + try { + return promiseResolvedWith(reader.cancel(reason)); + } + catch (e) { + return promiseRejectedWith(e); + } + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; +} + +function convertUnderlyingDefaultOrByteSource(source, context) { + assertDictionary(source, context); + const original = source; + const autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize; + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const pull = original === null || original === void 0 ? void 0 : original.pull; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + return { + autoAllocateChunkSize: autoAllocateChunkSize === undefined ? + undefined : + convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, `${context} has member 'autoAllocateChunkSize' that`), + cancel: cancel === undefined ? + undefined : + convertUnderlyingSourceCancelCallback(cancel, original, `${context} has member 'cancel' that`), + pull: pull === undefined ? + undefined : + convertUnderlyingSourcePullCallback(pull, original, `${context} has member 'pull' that`), + start: start === undefined ? + undefined : + convertUnderlyingSourceStartCallback(start, original, `${context} has member 'start' that`), + type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`) + }; +} +function convertUnderlyingSourceCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); +} +function convertUnderlyingSourcePullCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); +} +function convertUnderlyingSourceStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); +} +function convertReadableStreamType(type, context) { + type = `${type}`; + if (type !== 'bytes') { + throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`); + } + return type; +} + +function convertIteratorOptions(options, context) { + assertDictionary(options, context); + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + return { preventCancel: Boolean(preventCancel) }; +} + +function convertPipeOptions(options, context) { + assertDictionary(options, context); + const preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort; + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + const preventClose = options === null || options === void 0 ? void 0 : options.preventClose; + const signal = options === null || options === void 0 ? void 0 : options.signal; + if (signal !== undefined) { + assertAbortSignal(signal, `${context} has member 'signal' that`); + } + return { + preventAbort: Boolean(preventAbort), + preventCancel: Boolean(preventCancel), + preventClose: Boolean(preventClose), + signal + }; +} +function assertAbortSignal(signal, context) { + if (!isAbortSignal(signal)) { + throw new TypeError(`${context} is not an AbortSignal.`); + } +} + +function convertReadableWritablePair(pair, context) { + assertDictionary(pair, context); + const readable = pair === null || pair === void 0 ? void 0 : pair.readable; + assertRequiredField(readable, 'readable', 'ReadableWritablePair'); + assertReadableStream(readable, `${context} has member 'readable' that`); + const writable = pair === null || pair === void 0 ? void 0 : pair.writable; + assertRequiredField(writable, 'writable', 'ReadableWritablePair'); + assertWritableStream(writable, `${context} has member 'writable' that`); + return { readable, writable }; +} + +/** + * A readable stream represents a source of data, from which you can read. + * + * @public + */ +class ReadableStream { + constructor(rawUnderlyingSource = {}, rawStrategy = {}) { + if (rawUnderlyingSource === undefined) { + rawUnderlyingSource = null; + } + else { + assertObject(rawUnderlyingSource, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter'); + InitializeReadableStream(this); + if (underlyingSource.type === 'bytes') { + if (strategy.size !== undefined) { + throw new RangeError('The strategy for a byte stream cannot have a size function'); + } + const highWaterMark = ExtractHighWaterMark(strategy, 0); + SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark); + } + else { + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm); + } + } + /** + * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}. + */ + get locked() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('locked'); + } + return IsReadableStreamLocked(this); + } + /** + * Cancels the stream, signaling a loss of interest in the stream by a consumer. + * + * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()} + * method, which might or might not use it. + */ + cancel(reason = undefined) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('cancel')); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader')); + } + return ReadableStreamCancel(this, reason); + } + getReader(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('getReader'); + } + const options = convertReaderOptions(rawOptions, 'First parameter'); + if (options.mode === undefined) { + return AcquireReadableStreamDefaultReader(this); + } + return AcquireReadableStreamBYOBReader(this); + } + pipeThrough(rawTransform, rawOptions = {}) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('pipeThrough'); + } + assertRequiredArgument(rawTransform, 1, 'pipeThrough'); + const transform = convertReadableWritablePair(rawTransform, 'First parameter'); + const options = convertPipeOptions(rawOptions, 'Second parameter'); + if (IsReadableStreamLocked(this)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream'); + } + if (IsWritableStreamLocked(transform.writable)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream'); + } + const promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + setPromiseIsHandledToTrue(promise); + return transform.readable; + } + pipeTo(destination, rawOptions = {}) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('pipeTo')); + } + if (destination === undefined) { + return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`); + } + if (!IsWritableStream(destination)) { + return promiseRejectedWith(new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)); + } + let options; + try { + options = convertPipeOptions(rawOptions, 'Second parameter'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')); + } + if (IsWritableStreamLocked(destination)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')); + } + return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + } + /** + * Tees this readable stream, returning a two-element array containing the two resulting branches as + * new {@link ReadableStream} instances. + * + * Teeing a stream will lock it, preventing any other consumer from acquiring a reader. + * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be + * propagated to the stream's underlying source. + * + * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable, + * this could allow interference between the two branches. + */ + tee() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('tee'); + } + const branches = ReadableStreamTee(this); + return CreateArrayFromList(branches); + } + values(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('values'); + } + const options = convertIteratorOptions(rawOptions, 'First parameter'); + return AcquireReadableStreamAsyncIterator(this, options.preventCancel); + } + [SymbolAsyncIterator](options) { + // Stub implementation, overridden below + return this.values(options); + } + /** + * Creates a new ReadableStream wrapping the provided iterable or async iterable. + * + * This can be used to adapt various kinds of objects into a readable stream, + * such as an array, an async generator, or a Node.js readable stream. + */ + static from(asyncIterable) { + return ReadableStreamFrom(asyncIterable); + } +} +Object.defineProperties(ReadableStream, { + from: { enumerable: true } +}); +Object.defineProperties(ReadableStream.prototype, { + cancel: { enumerable: true }, + getReader: { enumerable: true }, + pipeThrough: { enumerable: true }, + pipeTo: { enumerable: true }, + tee: { enumerable: true }, + values: { enumerable: true }, + locked: { enumerable: true } +}); +setFunctionName(ReadableStream.from, 'from'); +setFunctionName(ReadableStream.prototype.cancel, 'cancel'); +setFunctionName(ReadableStream.prototype.getReader, 'getReader'); +setFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough'); +setFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo'); +setFunctionName(ReadableStream.prototype.tee, 'tee'); +setFunctionName(ReadableStream.prototype.values, 'values'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, { + value: 'ReadableStream', + configurable: true + }); +} +Object.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, { + value: ReadableStream.prototype.values, + writable: true, + configurable: true +}); +// Abstract operations for the ReadableStream. +// Throws if and only if startAlgorithm throws. +function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableStreamDefaultController.prototype); + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + return stream; +} +// Throws if and only if startAlgorithm throws. +function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableByteStreamController.prototype); + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined); + return stream; +} +function InitializeReadableStream(stream) { + stream._state = 'readable'; + stream._reader = undefined; + stream._storedError = undefined; + stream._disturbed = false; +} +function IsReadableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) { + return false; + } + return x instanceof ReadableStream; +} +function IsReadableStreamLocked(stream) { + if (stream._reader === undefined) { + return false; + } + return true; +} +// ReadableStream API exposed for controllers. +function ReadableStreamCancel(stream, reason) { + stream._disturbed = true; + if (stream._state === 'closed') { + return promiseResolvedWith(undefined); + } + if (stream._state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + ReadableStreamClose(stream); + const reader = stream._reader; + if (reader !== undefined && IsReadableStreamBYOBReader(reader)) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._closeSteps(undefined); + }); + } + const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason); + return transformPromiseWith(sourceCancelPromise, noop); +} +function ReadableStreamClose(stream) { + stream._state = 'closed'; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseResolve(reader); + if (IsReadableStreamDefaultReader(reader)) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._closeSteps(); + }); + } +} +function ReadableStreamError(stream, e) { + stream._state = 'errored'; + stream._storedError = e; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseReject(reader, e); + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + else { + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } +} +// Helper functions for the ReadableStream. +function streamBrandCheckException$1(name) { + return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`); +} + +function convertQueuingStrategyInit(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit'); + return { + highWaterMark: convertUnrestrictedDouble(highWaterMark) + }; +} + +// The size function must not have a prototype property nor be a constructor +const byteLengthSizeFunction = (chunk) => { + return chunk.byteLength; +}; +setFunctionName(byteLengthSizeFunction, 'size'); +/** + * A queuing strategy that counts the number of bytes in each chunk. + * + * @public + */ +class ByteLengthQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('highWaterMark'); + } + return this._byteLengthQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by returning the value of its `byteLength` property. + */ + get size() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('size'); + } + return byteLengthSizeFunction; + } +} +Object.defineProperties(ByteLengthQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'ByteLengthQueuingStrategy', + configurable: true + }); +} +// Helper functions for the ByteLengthQueuingStrategy. +function byteLengthBrandCheckException(name) { + return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`); +} +function IsByteLengthQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof ByteLengthQueuingStrategy; +} + +// The size function must not have a prototype property nor be a constructor +const countSizeFunction = () => { + return 1; +}; +setFunctionName(countSizeFunction, 'size'); +/** + * A queuing strategy that counts the number of chunks. + * + * @public + */ +class CountQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'CountQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._countQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('highWaterMark'); + } + return this._countQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by always returning 1. + * This ensures that the total queue size is a count of the number of chunks in the queue. + */ + get size() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('size'); + } + return countSizeFunction; + } +} +Object.defineProperties(CountQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'CountQueuingStrategy', + configurable: true + }); +} +// Helper functions for the CountQueuingStrategy. +function countBrandCheckException(name) { + return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`); +} +function IsCountQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof CountQueuingStrategy; +} + +function convertTransformer(original, context) { + assertDictionary(original, context); + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const flush = original === null || original === void 0 ? void 0 : original.flush; + const readableType = original === null || original === void 0 ? void 0 : original.readableType; + const start = original === null || original === void 0 ? void 0 : original.start; + const transform = original === null || original === void 0 ? void 0 : original.transform; + const writableType = original === null || original === void 0 ? void 0 : original.writableType; + return { + cancel: cancel === undefined ? + undefined : + convertTransformerCancelCallback(cancel, original, `${context} has member 'cancel' that`), + flush: flush === undefined ? + undefined : + convertTransformerFlushCallback(flush, original, `${context} has member 'flush' that`), + readableType, + start: start === undefined ? + undefined : + convertTransformerStartCallback(start, original, `${context} has member 'start' that`), + transform: transform === undefined ? + undefined : + convertTransformerTransformCallback(transform, original, `${context} has member 'transform' that`), + writableType + }; +} +function convertTransformerFlushCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); +} +function convertTransformerStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); +} +function convertTransformerTransformCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); +} +function convertTransformerCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); +} + +// Class TransformStream +/** + * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream}, + * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side. + * In a manner specific to the transform stream in question, writes to the writable side result in new data being + * made available for reading from the readable side. + * + * @public + */ +class TransformStream { + constructor(rawTransformer = {}, rawWritableStrategy = {}, rawReadableStrategy = {}) { + if (rawTransformer === undefined) { + rawTransformer = null; + } + const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter'); + const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter'); + const transformer = convertTransformer(rawTransformer, 'First parameter'); + if (transformer.readableType !== undefined) { + throw new RangeError('Invalid readableType specified'); + } + if (transformer.writableType !== undefined) { + throw new RangeError('Invalid writableType specified'); + } + const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0); + const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy); + const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1); + const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy); + let startPromise_resolve; + const startPromise = newPromise(resolve => { + startPromise_resolve = resolve; + }); + InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + SetUpTransformStreamDefaultControllerFromTransformer(this, transformer); + if (transformer.start !== undefined) { + startPromise_resolve(transformer.start(this._transformStreamController)); + } + else { + startPromise_resolve(undefined); + } + } + /** + * The readable side of the transform stream. + */ + get readable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('readable'); + } + return this._readable; + } + /** + * The writable side of the transform stream. + */ + get writable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('writable'); + } + return this._writable; + } +} +Object.defineProperties(TransformStream.prototype, { + readable: { enumerable: true }, + writable: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, { + value: 'TransformStream', + configurable: true + }); +} +function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) { + function startAlgorithm() { + return startPromise; + } + function writeAlgorithm(chunk) { + return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk); + } + function abortAlgorithm(reason) { + return TransformStreamDefaultSinkAbortAlgorithm(stream, reason); + } + function closeAlgorithm() { + return TransformStreamDefaultSinkCloseAlgorithm(stream); + } + stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm); + function pullAlgorithm() { + return TransformStreamDefaultSourcePullAlgorithm(stream); + } + function cancelAlgorithm(reason) { + return TransformStreamDefaultSourceCancelAlgorithm(stream, reason); + } + stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure. + stream._backpressure = undefined; + stream._backpressureChangePromise = undefined; + stream._backpressureChangePromise_resolve = undefined; + TransformStreamSetBackpressure(stream, true); + stream._transformStreamController = undefined; +} +function IsTransformStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) { + return false; + } + return x instanceof TransformStream; +} +// This is a no-op if both sides are already errored. +function TransformStreamError(stream, e) { + ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e); + TransformStreamErrorWritableAndUnblockWrite(stream, e); +} +function TransformStreamErrorWritableAndUnblockWrite(stream, e) { + TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController); + WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e); + TransformStreamUnblockWrite(stream); +} +function TransformStreamUnblockWrite(stream) { + if (stream._backpressure) { + // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure() + // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time + // _backpressure is set. + TransformStreamSetBackpressure(stream, false); + } +} +function TransformStreamSetBackpressure(stream, backpressure) { + // Passes also when called during construction. + if (stream._backpressureChangePromise !== undefined) { + stream._backpressureChangePromise_resolve(); + } + stream._backpressureChangePromise = newPromise(resolve => { + stream._backpressureChangePromise_resolve = resolve; + }); + stream._backpressure = backpressure; +} +// Class TransformStreamDefaultController +/** + * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}. + * + * @public + */ +class TransformStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full. + */ + get desiredSize() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('desiredSize'); + } + const readableController = this._controlledTransformStream._readable._readableStreamController; + return ReadableStreamDefaultControllerGetDesiredSize(readableController); + } + enqueue(chunk = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('enqueue'); + } + TransformStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors both the readable side and the writable side of the controlled transform stream, making all future + * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded. + */ + error(reason = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('error'); + } + TransformStreamDefaultControllerError(this, reason); + } + /** + * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the + * transformer only needs to consume a portion of the chunks written to the writable side. + */ + terminate() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('terminate'); + } + TransformStreamDefaultControllerTerminate(this); + } +} +Object.defineProperties(TransformStreamDefaultController.prototype, { + enqueue: { enumerable: true }, + error: { enumerable: true }, + terminate: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue'); +setFunctionName(TransformStreamDefaultController.prototype.error, 'error'); +setFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'TransformStreamDefaultController', + configurable: true + }); +} +// Transform Stream Default Controller Abstract Operations +function IsTransformStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) { + return false; + } + return x instanceof TransformStreamDefaultController; +} +function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm) { + controller._controlledTransformStream = stream; + stream._transformStreamController = controller; + controller._transformAlgorithm = transformAlgorithm; + controller._flushAlgorithm = flushAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._finishPromise = undefined; + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) { + const controller = Object.create(TransformStreamDefaultController.prototype); + let transformAlgorithm; + let flushAlgorithm; + let cancelAlgorithm; + if (transformer.transform !== undefined) { + transformAlgorithm = chunk => transformer.transform(chunk, controller); + } + else { + transformAlgorithm = chunk => { + try { + TransformStreamDefaultControllerEnqueue(controller, chunk); + return promiseResolvedWith(undefined); + } + catch (transformResultE) { + return promiseRejectedWith(transformResultE); + } + }; + } + if (transformer.flush !== undefined) { + flushAlgorithm = () => transformer.flush(controller); + } + else { + flushAlgorithm = () => promiseResolvedWith(undefined); + } + if (transformer.cancel !== undefined) { + cancelAlgorithm = reason => transformer.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm); +} +function TransformStreamDefaultControllerClearAlgorithms(controller) { + controller._transformAlgorithm = undefined; + controller._flushAlgorithm = undefined; + controller._cancelAlgorithm = undefined; +} +function TransformStreamDefaultControllerEnqueue(controller, chunk) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) { + throw new TypeError('Readable side is not in a state that permits enqueue'); + } + // We throttle transform invocations based on the backpressure of the ReadableStream, but we still + // accept TransformStreamDefaultControllerEnqueue() calls. + try { + ReadableStreamDefaultControllerEnqueue(readableController, chunk); + } + catch (e) { + // This happens when readableStrategy.size() throws. + TransformStreamErrorWritableAndUnblockWrite(stream, e); + throw stream._readable._storedError; + } + const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController); + if (backpressure !== stream._backpressure) { + TransformStreamSetBackpressure(stream, true); + } +} +function TransformStreamDefaultControllerError(controller, e) { + TransformStreamError(controller._controlledTransformStream, e); +} +function TransformStreamDefaultControllerPerformTransform(controller, chunk) { + const transformPromise = controller._transformAlgorithm(chunk); + return transformPromiseWith(transformPromise, undefined, r => { + TransformStreamError(controller._controlledTransformStream, r); + throw r; + }); +} +function TransformStreamDefaultControllerTerminate(controller) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + ReadableStreamDefaultControllerClose(readableController); + const error = new TypeError('TransformStream terminated'); + TransformStreamErrorWritableAndUnblockWrite(stream, error); +} +// TransformStreamDefaultSink Algorithms +function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) { + const controller = stream._transformStreamController; + if (stream._backpressure) { + const backpressureChangePromise = stream._backpressureChangePromise; + return transformPromiseWith(backpressureChangePromise, () => { + const writable = stream._writable; + const state = writable._state; + if (state === 'erroring') { + throw writable._storedError; + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + }); + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); +} +function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally, + // we don't run the _cancelAlgorithm again. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerError(readable._readableStreamController, reason); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +function TransformStreamDefaultSinkCloseAlgorithm(stream) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally, + // we don't also run the _cancelAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const flushPromise = controller._flushAlgorithm(); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(flushPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerClose(readable._readableStreamController); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +// TransformStreamDefaultSource Algorithms +function TransformStreamDefaultSourcePullAlgorithm(stream) { + // Invariant. Enforced by the promises returned by start() and pull(). + TransformStreamSetBackpressure(stream, false); + // Prevent the next pull() call until there is backpressure. + return stream._backpressureChangePromise; +} +function TransformStreamDefaultSourceCancelAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._writable cannot change after construction, so caching it across a call to user code is safe. + const writable = stream._writable; + // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or + // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the + // _flushAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (writable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, writable._storedError); + } + else { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +// Helper functions for the TransformStreamDefaultController. +function defaultControllerBrandCheckException(name) { + return new TypeError(`TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`); +} +function defaultControllerFinishPromiseResolve(controller) { + if (controller._finishPromise_resolve === undefined) { + return; + } + controller._finishPromise_resolve(); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +function defaultControllerFinishPromiseReject(controller, reason) { + if (controller._finishPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(controller._finishPromise); + controller._finishPromise_reject(reason); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +// Helper functions for the TransformStream. +function streamBrandCheckException(name) { + return new TypeError(`TransformStream.prototype.${name} can only be used on a TransformStream`); +} + +const exports = { + ReadableStream, + ReadableStreamDefaultController, + ReadableByteStreamController, + ReadableStreamBYOBRequest, + ReadableStreamDefaultReader, + ReadableStreamBYOBReader, + WritableStream, + WritableStreamDefaultController, + WritableStreamDefaultWriter, + ByteLengthQueuingStrategy, + CountQueuingStrategy, + TransformStream, + TransformStreamDefaultController +}; +// Add classes to global scope +if (typeof globals !== 'undefined') { + for (const prop in exports) { + if (Object.prototype.hasOwnProperty.call(exports, prop)) { + Object.defineProperty(globals, prop, { + value: exports[prop], + writable: true, + configurable: true + }); + } + } +} + +export { ByteLengthQueuingStrategy, CountQueuingStrategy, ReadableByteStreamController, ReadableStream, ReadableStreamBYOBReader, ReadableStreamBYOBRequest, ReadableStreamDefaultController, ReadableStreamDefaultReader, TransformStream, TransformStreamDefaultController, WritableStream, WritableStreamDefaultController, WritableStreamDefaultWriter }; +//# sourceMappingURL=polyfill.es2018.mjs.map diff --git a/node_modules/web-streams-polyfill/dist/polyfill.es2018.mjs.map b/node_modules/web-streams-polyfill/dist/polyfill.es2018.mjs.map new file mode 100644 index 00000000..3d8bc87a --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/polyfill.es2018.mjs.map @@ -0,0 +1 @@ +{"version":3,"file":"polyfill.es2018.mjs","sources":["../src/utils.ts","../src/lib/helpers/miscellaneous.ts","../src/lib/helpers/webidl.ts","../src/lib/simple-queue.ts","../src/lib/abstract-ops/internal-methods.ts","../src/lib/readable-stream/generic-reader.ts","../src/stub/number-isfinite.ts","../src/stub/math-trunc.ts","../src/lib/validators/basic.ts","../src/lib/validators/readable-stream.ts","../src/lib/readable-stream/default-reader.ts","../src/target/es2018/stub/async-iterator-prototype.ts","../src/lib/readable-stream/async-iterator.ts","../src/stub/number-isnan.ts","../src/lib/abstract-ops/ecmascript.ts","../src/lib/abstract-ops/miscellaneous.ts","../src/lib/abstract-ops/queue-with-sizes.ts","../src/lib/helpers/array-buffer-view.ts","../src/lib/readable-stream/byte-stream-controller.ts","../src/lib/validators/reader-options.ts","../src/lib/readable-stream/byob-reader.ts","../src/lib/abstract-ops/queuing-strategy.ts","../src/lib/validators/queuing-strategy.ts","../src/lib/validators/underlying-sink.ts","../src/lib/validators/writable-stream.ts","../src/lib/abort-signal.ts","../src/lib/writable-stream.ts","../src/globals.ts","../src/stub/dom-exception.ts","../src/lib/readable-stream/pipe.ts","../src/lib/readable-stream/default-controller.ts","../src/lib/readable-stream/tee.ts","../src/lib/readable-stream/readable-stream-like.ts","../src/lib/readable-stream/from.ts","../src/lib/validators/underlying-source.ts","../src/lib/validators/iterator-options.ts","../src/lib/validators/pipe-options.ts","../src/lib/validators/readable-writable-pair.ts","../src/lib/readable-stream.ts","../src/lib/validators/queuing-strategy-init.ts","../src/lib/byte-length-queuing-strategy.ts","../src/lib/count-queuing-strategy.ts","../src/lib/validators/transformer.ts","../src/lib/transform-stream.ts","../src/polyfill.ts"],"sourcesContent":["export function noop(): undefined {\n return undefined;\n}\n","import { noop } from '../../utils';\nimport { AssertionError } from '../../stub/assert';\n\nexport function typeIsObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport const rethrowAssertionErrorRejection: (e: any) => void =\n DEBUG ? e => {\n // Used throughout the reference implementation, as `.catch(rethrowAssertionErrorRejection)`, to ensure any errors\n // get shown. There are places in the spec where we do promise transformations and purposefully ignore or don't\n // expect any errors, but assertion errors are always problematic.\n if (e && e instanceof AssertionError) {\n setTimeout(() => {\n throw e;\n }, 0);\n }\n } : noop;\n\nexport function setFunctionName(fn: Function, name: string): void {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n } catch {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n}\n","import { rethrowAssertionErrorRejection } from './miscellaneous';\nimport assert from '../../stub/assert';\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\n\n// https://webidl.spec.whatwg.org/#a-new-promise\nexport function newPromise(executor: (\n resolve: (value: T | PromiseLike) => void,\n reject: (reason?: any) => void\n) => void): Promise {\n return new originalPromise(executor);\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-resolved-with\nexport function promiseResolvedWith(value: T | PromiseLike): Promise {\n return newPromise(resolve => resolve(value));\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-rejected-with\nexport function promiseRejectedWith(reason: any): Promise {\n return originalPromiseReject(reason);\n}\n\nexport function PerformPromiseThen(\n promise: Promise,\n onFulfilled?: (value: T) => TResult1 | PromiseLike,\n onRejected?: (reason: any) => TResult2 | PromiseLike): Promise {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected) as Promise;\n}\n\n// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n// from that handler. To prevent this, return null instead of void from all handlers.\n// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\nexport function uponPromise(\n promise: Promise,\n onFulfilled?: (value: T) => null | PromiseLike,\n onRejected?: (reason: any) => null | PromiseLike): void {\n PerformPromiseThen(\n PerformPromiseThen(promise, onFulfilled, onRejected),\n undefined,\n rethrowAssertionErrorRejection\n );\n}\n\nexport function uponFulfillment(promise: Promise, onFulfilled: (value: T) => null | PromiseLike): void {\n uponPromise(promise, onFulfilled);\n}\n\nexport function uponRejection(promise: Promise, onRejected: (reason: any) => null | PromiseLike): void {\n uponPromise(promise, undefined, onRejected);\n}\n\nexport function transformPromiseWith(\n promise: Promise,\n fulfillmentHandler?: (value: T) => TResult1 | PromiseLike,\n rejectionHandler?: (reason: any) => TResult2 | PromiseLike): Promise {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\n\nexport function setPromiseIsHandledToTrue(promise: Promise): void {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\nlet _queueMicrotask: (callback: () => void) => void = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n } else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n};\n\nexport { _queueMicrotask as queueMicrotask };\n\nexport function reflectCall(F: (this: T, ...fnArgs: A) => R, V: T, args: A): R {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n}\n\nexport function promiseCall(F: (this: T, ...fnArgs: A) => R | PromiseLike,\n V: T,\n args: A): Promise {\n assert(typeof F === 'function');\n assert(V !== undefined);\n assert(Array.isArray(args));\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n } catch (value) {\n return promiseRejectedWith(value);\n }\n}\n","import assert from '../stub/assert';\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n\ninterface Node {\n _elements: T[];\n _next: Node | undefined;\n}\n\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nexport class SimpleQueue {\n private _front: Node;\n private _back: Node;\n private _cursor = 0;\n private _size = 0;\n\n constructor() {\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n\n get length(): number {\n return this._size;\n }\n\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element: T): void {\n const oldBack = this._back;\n let newBack = oldBack;\n assert(oldBack._next === undefined);\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n assert(elements.length === QUEUE_MAX_ARRAY_SIZE);\n assert(oldFront._next !== undefined);\n newFront = oldFront._next!;\n newCursor = 0;\n }\n\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined!;\n\n return element;\n }\n\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback: (element: T) => void): void {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n assert(node._next !== undefined);\n assert(i === QUEUE_MAX_ARRAY_SIZE);\n node = node._next!;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n}\n","export const AbortSteps = Symbol('[[AbortSteps]]');\nexport const ErrorSteps = Symbol('[[ErrorSteps]]');\nexport const CancelSteps = Symbol('[[CancelSteps]]');\nexport const PullSteps = Symbol('[[PullSteps]]');\nexport const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n","import assert from '../../stub/assert';\nimport { ReadableStream, ReadableStreamCancel, type ReadableStreamReader } from '../readable-stream';\nimport { newPromise, setPromiseIsHandledToTrue } from '../helpers/webidl';\nimport { ReleaseSteps } from '../abstract-ops/internal-methods';\n\nexport function ReadableStreamReaderGenericInitialize(reader: ReadableStreamReader, stream: ReadableStream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n } else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n } else {\n assert(stream._state === 'errored');\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n}\n\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\n\nexport function ReadableStreamReaderGenericCancel(reader: ReadableStreamReader, reason: any): Promise {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n return ReadableStreamCancel(stream, reason);\n}\n\nexport function ReadableStreamReaderGenericRelease(reader: ReadableStreamReader) {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n assert(stream._reader === reader);\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n } else {\n defaultReaderClosedPromiseResetToRejected(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n\n stream._readableStreamController[ReleaseSteps]();\n\n stream._reader = undefined;\n reader._ownerReadableStream = undefined!;\n}\n\n// Helper functions for the readers.\n\nexport function readerLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nexport function defaultReaderClosedPromiseInitialize(reader: ReadableStreamReader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n}\n\nexport function defaultReaderClosedPromiseInitializeAsRejected(reader: ReadableStreamReader, reason: any) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseInitializeAsResolved(reader: ReadableStreamReader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n}\n\nexport function defaultReaderClosedPromiseReject(reader: ReadableStreamReader, reason: any) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n\nexport function defaultReaderClosedPromiseResetToRejected(reader: ReadableStreamReader, reason: any) {\n assert(reader._closedPromise_resolve === undefined);\n assert(reader._closedPromise_reject === undefined);\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseResolve(reader: ReadableStreamReader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite: typeof Number.isFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n};\n\nexport default NumberIsFinite;\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc: typeof Math.trunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\nexport default MathTrunc;\n","import NumberIsFinite from '../../stub/number-isfinite';\nimport MathTrunc from '../../stub/math-trunc';\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nexport function isDictionary(x: any): x is object | null {\n return typeof x === 'object' || typeof x === 'function';\n}\n\nexport function assertDictionary(obj: unknown,\n context: string): asserts obj is object | null | undefined {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport type AnyFunction = (...args: any[]) => any;\n\n// https://heycam.github.io/webidl/#idl-callback-functions\nexport function assertFunction(x: unknown, context: string): asserts x is AnyFunction {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-object\nexport function isObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport function assertObject(x: unknown,\n context: string): asserts x is object {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport function assertRequiredArgument(x: T | undefined,\n position: number,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n}\n\nexport function assertRequiredField(x: T | undefined,\n field: string,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nexport function convertUnrestrictedDouble(value: unknown): number {\n return Number(value);\n}\n\nfunction censorNegativeZero(x: number): number {\n return x === 0 ? 0 : x;\n}\n\nfunction integerPart(x: number): number {\n return censorNegativeZero(MathTrunc(x));\n}\n\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nexport function convertUnsignedLongLongWithEnforceRange(value: unknown, context: string): number {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n\n let x = Number(value);\n x = censorNegativeZero(x);\n\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n\n x = integerPart(x);\n\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n\n return x;\n}\n","import { IsReadableStream, ReadableStream } from '../readable-stream';\n\nexport function assertReadableStream(x: unknown, context: string): asserts x is ReadableStream {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, ReadableStream } from '../readable-stream';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { PullSteps } from '../abstract-ops/internal-methods';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\n\n/**\n * A result returned by {@link ReadableStreamDefaultReader.read}.\n *\n * @public\n */\nexport type ReadableStreamDefaultReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value?: undefined;\n}\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamDefaultReader(stream: ReadableStream): ReadableStreamDefaultReader {\n return new ReadableStreamDefaultReader(stream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadRequest(stream: ReadableStream,\n readRequest: ReadRequest): void {\n assert(IsReadableStreamDefaultReader(stream._reader));\n assert(stream._state === 'readable');\n\n (stream._reader! as ReadableStreamDefaultReader)._readRequests.push(readRequest);\n}\n\nexport function ReadableStreamFulfillReadRequest(stream: ReadableStream, chunk: R | undefined, done: boolean) {\n const reader = stream._reader as ReadableStreamDefaultReader;\n\n assert(reader._readRequests.length > 0);\n\n const readRequest = reader._readRequests.shift()!;\n if (done) {\n readRequest._closeSteps();\n } else {\n readRequest._chunkSteps(chunk!);\n }\n}\n\nexport function ReadableStreamGetNumReadRequests(stream: ReadableStream): number {\n return (stream._reader as ReadableStreamDefaultReader)._readRequests.length;\n}\n\nexport function ReadableStreamHasDefaultReader(stream: ReadableStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadRequest {\n _chunkSteps(chunk: R): void;\n\n _closeSteps(): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamDefaultReader {\n /** @internal */\n _ownerReadableStream!: ReadableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(): Promise> {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamDefaultReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamDefaultReader(x: any): x is ReadableStreamDefaultReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultReader;\n}\n\nexport function ReadableStreamDefaultReaderRead(reader: ReadableStreamDefaultReader,\n readRequest: ReadRequest): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n } else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n } else {\n assert(stream._state === 'readable');\n stream._readableStreamController[PullSteps](readRequest as ReadRequest);\n }\n}\n\nexport function ReadableStreamDefaultReaderRelease(reader: ReadableStreamDefaultReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n}\n\nexport function ReadableStreamDefaultReaderErrorReadRequests(reader: ReadableStreamDefaultReader, e: any) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nfunction defaultReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n","/// \n\n/* eslint-disable @typescript-eslint/no-empty-function */\nexport const AsyncIteratorPrototype: AsyncIterable =\n Object.getPrototypeOf(Object.getPrototypeOf(async function* (): AsyncIterableIterator {}).prototype);\n","/// \n\nimport { ReadableStream } from '../readable-stream';\nimport {\n AcquireReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadableStreamDefaultReadResult,\n type ReadRequest\n} from './default-reader';\nimport { ReadableStreamReaderGenericCancel, ReadableStreamReaderGenericRelease } from './generic-reader';\nimport assert from '../../stub/assert';\nimport { AsyncIteratorPrototype } from '@@target/stub/async-iterator-prototype';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n queueMicrotask,\n transformPromiseWith\n} from '../helpers/webidl';\n\n/**\n * An async iterator returned by {@link ReadableStream.values}.\n *\n * @public\n */\nexport interface ReadableStreamAsyncIterator extends AsyncIterableIterator {\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nexport class ReadableStreamAsyncIteratorImpl {\n private readonly _reader: ReadableStreamDefaultReader;\n private readonly _preventCancel: boolean;\n private _ongoingPromise: Promise> | undefined = undefined;\n private _isFinished = false;\n\n constructor(reader: ReadableStreamDefaultReader, preventCancel: boolean) {\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n\n next(): Promise> {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n\n return(value: any): Promise> {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n\n private _nextSteps(): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n\n private _returnSteps(value: any): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n assert(reader._readRequests.length === 0);\n\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n}\n\ninterface ReadableStreamAsyncIteratorInstance extends ReadableStreamAsyncIterator {\n /** @interal */\n _asyncIteratorImpl: ReadableStreamAsyncIteratorImpl;\n\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nconst ReadableStreamAsyncIteratorPrototype: ReadableStreamAsyncIteratorInstance = {\n next(this: ReadableStreamAsyncIteratorInstance): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n\n return(this: ReadableStreamAsyncIteratorInstance, value: any): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n} as any;\nObject.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamAsyncIterator(stream: ReadableStream,\n preventCancel: boolean): ReadableStreamAsyncIterator {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator: ReadableStreamAsyncIteratorInstance = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n}\n\nfunction IsReadableStreamAsyncIterator(x: any): x is ReadableStreamAsyncIterator {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n\n try {\n // noinspection SuspiciousTypeOfGuard\n return (x as ReadableStreamAsyncIteratorInstance)._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n } catch {\n return false;\n }\n}\n\n// Helper functions for the ReadableStream.\n\nfunction streamAsyncIteratorBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN: typeof Number.isNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n};\n\nexport default NumberIsNaN;\n","import { reflectCall } from 'lib/helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport assert from '../../stub/assert';\n\ndeclare global {\n interface ArrayBuffer {\n readonly detached: boolean;\n\n transfer(): ArrayBuffer;\n }\n\n function structuredClone(value: T, options: { transfer: ArrayBuffer[] }): T;\n}\n\nexport function CreateArrayFromList(elements: T): T {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice() as T;\n}\n\nexport function CopyDataBlockBytes(dest: ArrayBuffer,\n destOffset: number,\n src: ArrayBuffer,\n srcOffset: number,\n n: number) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n\nexport let TransferArrayBuffer = (O: ArrayBuffer): ArrayBuffer => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n } else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n } else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n};\n\nexport function CanTransferArrayBuffer(O: ArrayBuffer): boolean {\n return !IsDetachedBuffer(O);\n}\n\nexport let IsDetachedBuffer = (O: ArrayBuffer): boolean => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n } else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n};\n\nexport function ArrayBufferSlice(buffer: ArrayBuffer, begin: number, end: number): ArrayBuffer {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n}\n\nexport type MethodName = {\n [P in keyof T]: T[P] extends Function | undefined ? P : never;\n}[keyof T];\n\nexport function GetMethod>(receiver: T, prop: K): T[K] | undefined {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n}\n\nexport interface SyncIteratorRecord {\n iterator: Iterator,\n nextMethod: Iterator['next'],\n done: boolean;\n}\n\nexport interface AsyncIteratorRecord {\n iterator: AsyncIterator,\n nextMethod: AsyncIterator['next'],\n done: boolean;\n}\n\nexport type SyncOrAsyncIteratorRecord = SyncIteratorRecord | AsyncIteratorRecord;\n\nexport function CreateAsyncFromSyncIterator(syncIteratorRecord: SyncIteratorRecord): AsyncIteratorRecord {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n}\n\n// Aligns with core-js/modules/es.symbol.async-iterator.js\nexport const SymbolAsyncIterator: (typeof Symbol)['asyncIterator'] =\n Symbol.asyncIterator ??\n Symbol.for?.('Symbol.asyncIterator') ??\n '@@asyncIterator';\n\nexport type SyncOrAsyncIterable = Iterable | AsyncIterable;\nexport type SyncOrAsyncIteratorMethod = () => (Iterator | AsyncIterator);\n\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint: 'async',\n method?: SyncOrAsyncIteratorMethod\n): AsyncIteratorRecord;\nfunction GetIterator(\n obj: Iterable,\n hint: 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncIteratorRecord;\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint = 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncOrAsyncIteratorRecord {\n assert(hint === 'sync' || hint === 'async');\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj as AsyncIterable, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj as Iterable, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj as Iterable, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n } else {\n method = GetMethod(obj as Iterable, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false } as SyncOrAsyncIteratorRecord;\n}\n\nexport { GetIterator };\n\nexport function IteratorNext(iteratorRecord: AsyncIteratorRecord): Promise> {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n}\n\nexport function IteratorComplete(\n iterResult: IteratorResult\n): iterResult is IteratorReturnResult {\n assert(typeIsObject(iterResult));\n return Boolean(iterResult.done);\n}\n\nexport function IteratorValue(iterResult: IteratorYieldResult): T {\n assert(typeIsObject(iterResult));\n return iterResult.value;\n}\n","import NumberIsNaN from '../../stub/number-isnan';\nimport { ArrayBufferSlice } from './ecmascript';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function IsNonNegativeNumber(v: number): boolean {\n if (typeof v !== 'number') {\n return false;\n }\n\n if (NumberIsNaN(v)) {\n return false;\n }\n\n if (v < 0) {\n return false;\n }\n\n return true;\n}\n\nexport function CloneAsUint8Array(O: NonShared): NonShared {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer) as NonShared;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsNonNegativeNumber } from './miscellaneous';\n\nexport interface QueueContainer {\n _queue: SimpleQueue;\n _queueTotalSize: number;\n}\n\nexport interface QueuePair {\n value: T;\n size: number;\n}\n\nexport function DequeueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.shift()!;\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n\n return pair.value;\n}\n\nexport function EnqueueValueWithSize(container: QueueContainer>, value: T, size: number) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n}\n\nexport function PeekQueueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.peek();\n return pair.value;\n}\n\nexport function ResetQueue(container: QueueContainer) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n}\n","export type TypedArray =\n | Int8Array\n | Uint8Array\n | Uint8ClampedArray\n | Int16Array\n | Uint16Array\n | Int32Array\n | Uint32Array\n | Float32Array\n | Float64Array;\n\nexport type NonShared = T & {\n buffer: ArrayBuffer;\n}\n\nexport interface ArrayBufferViewConstructor {\n new(buffer: ArrayBuffer, byteOffset: number, length?: number): T;\n\n readonly prototype: T;\n}\n\nexport interface TypedArrayConstructor extends ArrayBufferViewConstructor {\n readonly BYTES_PER_ELEMENT: number;\n}\n\nexport type DataViewConstructor = ArrayBufferViewConstructor;\n\nfunction isDataViewConstructor(ctor: Function): ctor is DataViewConstructor {\n return ctor === DataView;\n}\n\nexport function isDataView(view: ArrayBufferView): view is DataView {\n return isDataViewConstructor(view.constructor);\n}\n\nexport function arrayBufferViewElementSize(ctor: ArrayBufferViewConstructor): number {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return (ctor as unknown as TypedArrayConstructor).BYTES_PER_ELEMENT;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n IsReadableStreamDefaultReader,\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n ReadableStreamHasDefaultReader,\n type ReadRequest\n} from './default-reader';\nimport {\n ReadableStreamAddReadIntoRequest,\n ReadableStreamFulfillReadIntoRequest,\n ReadableStreamGetNumReadIntoRequests,\n ReadableStreamHasBYOBReader,\n type ReadIntoRequest\n} from './byob-reader';\nimport NumberIsInteger from '../../stub/number-isinteger';\nimport {\n IsReadableStreamLocked,\n type ReadableByteStream,\n ReadableStreamClose,\n ReadableStreamError\n} from '../readable-stream';\nimport type { ValidatedUnderlyingByteSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport {\n ArrayBufferSlice,\n CanTransferArrayBuffer,\n CopyDataBlockBytes,\n IsDetachedBuffer,\n TransferArrayBuffer\n} from '../abstract-ops/ecmascript';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\nimport { assertRequiredArgument, convertUnsignedLongLongWithEnforceRange } from '../validators/basic';\nimport {\n type ArrayBufferViewConstructor,\n arrayBufferViewElementSize,\n type NonShared,\n type TypedArrayConstructor\n} from '../helpers/array-buffer-view';\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nexport class ReadableStreamBYOBRequest {\n /** @internal */\n _associatedReadableByteStreamController!: ReadableByteStreamController;\n /** @internal */\n _view!: NonShared | null;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view(): ArrayBufferView | null {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n\n return this._view;\n }\n\n /**\n * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into\n * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer.\n *\n * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer\n * modifiable.\n */\n respond(bytesWritten: number): void;\n respond(bytesWritten: number | undefined): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(this._view!.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n\n assert(this._view!.byteLength > 0);\n assert(this._view!.buffer.byteLength > 0);\n\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n\n /**\n * Indicates to the associated readable byte stream that instead of writing into\n * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`,\n * which will be given to the consumer of the readable byte stream.\n *\n * After this method is called, `view` will be transferred and no longer modifiable.\n */\n respondWithNewView(view: ArrayBufferView): void;\n respondWithNewView(view: NonShared): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n}\n\ninterface ByteQueueElement {\n buffer: ArrayBuffer;\n byteOffset: number;\n byteLength: number;\n}\n\ntype PullIntoDescriptor = NonShared> =\n DefaultPullIntoDescriptor\n | BYOBPullIntoDescriptor;\n\ninterface DefaultPullIntoDescriptor {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: TypedArrayConstructor;\n readerType: 'default' | 'none';\n}\n\ninterface BYOBPullIntoDescriptor = NonShared> {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: ArrayBufferViewConstructor;\n readerType: 'byob' | 'none';\n}\n\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableByteStreamController {\n /** @internal */\n _controlledReadableByteStream!: ReadableByteStream;\n /** @internal */\n _queue!: SimpleQueue;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n /** @internal */\n _autoAllocateChunkSize: number | undefined;\n /** @internal */\n _byobRequest: ReadableStreamBYOBRequest | null;\n /** @internal */\n _pendingPullIntos!: SimpleQueue;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest(): ReadableStreamBYOBRequest | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n\n ReadableByteStreamControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk chunk in the controlled readable stream.\n * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown.\n */\n enqueue(chunk: ArrayBufferView): void;\n enqueue(chunk: NonShared): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n\n ReadableByteStreamControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n\n ResetQueue(this);\n\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest>): void {\n const stream = this._controlledReadableByteStream;\n assert(ReadableStreamHasDefaultReader(stream));\n\n if (this._queueTotalSize > 0) {\n assert(ReadableStreamGetNumReadRequests(stream) === 0);\n\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer: ArrayBuffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n } catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n\n const pullIntoDescriptor: DefaultPullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n}\n\nObject.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableByteStreamController.prototype.close, 'close');\nsetFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableByteStreamController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableByteStreamController.\n\nexport function IsReadableByteStreamController(x: any): x is ReadableByteStreamController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n\n return x instanceof ReadableByteStreamController;\n}\n\nfunction IsReadableStreamBYOBRequest(x: any): x is ReadableStreamBYOBRequest {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBRequest;\n}\n\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller: ReadableByteStreamController): void {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller: ReadableByteStreamController) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n}\n\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor>(\n stream: ReadableByteStream,\n pullIntoDescriptor: PullIntoDescriptor\n) {\n assert(stream._state !== 'errored');\n assert(pullIntoDescriptor.readerType !== 'none');\n\n let done = false;\n if (stream._state === 'closed') {\n assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);\n done = true;\n }\n\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView as unknown as NonShared, done);\n } else {\n assert(pullIntoDescriptor.readerType === 'byob');\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n}\n\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor>(\n pullIntoDescriptor: PullIntoDescriptor\n): T {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n\n assert(bytesFilled <= pullIntoDescriptor.byteLength);\n assert(bytesFilled % elementSize === 0);\n\n return new pullIntoDescriptor.viewConstructor(\n pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize) as T;\n}\n\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n}\n\nfunction ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n } catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n}\n\nfunction ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.readerType === 'none');\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n firstDescriptor.buffer,\n firstDescriptor.byteOffset,\n firstDescriptor.bytesFilled\n );\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n}\n\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller: ReadableByteStreamController,\n pullIntoDescriptor: PullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize,\n pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n\n const queue = controller._queue;\n\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n } else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n\n if (!ready) {\n assert(controller._queueTotalSize === 0);\n assert(pullIntoDescriptor.bytesFilled > 0);\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n }\n\n return ready;\n}\n\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller: ReadableByteStreamController,\n size: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);\n assert(controller._byobRequest === null);\n pullIntoDescriptor.bytesFilled += size;\n}\n\nfunction ReadableByteStreamControllerHandleQueueDrain(controller: ReadableByteStreamController) {\n assert(controller._controlledReadableByteStream._state === 'readable');\n\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n } else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n}\n\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller: ReadableByteStreamController) {\n if (controller._byobRequest === null) {\n return;\n }\n\n controller._byobRequest._associatedReadableByteStreamController = undefined!;\n controller._byobRequest._view = null!;\n controller._byobRequest = null;\n}\n\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller: ReadableByteStreamController) {\n assert(!controller._closeRequested);\n\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n assert(pullIntoDescriptor.readerType !== 'none');\n\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n ReadableByteStreamControllerCommitPullIntoDescriptor(\n controller._controlledReadableByteStream,\n pullIntoDescriptor\n );\n }\n }\n}\n\nfunction ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller: ReadableByteStreamController) {\n const reader = controller._controlledReadableByteStream._reader;\n assert(IsReadableStreamDefaultReader(reader));\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n}\n\nexport function ReadableByteStreamControllerPullInto>(\n controller: ReadableByteStreamController,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = controller._controlledReadableByteStream;\n\n const ctor = view.constructor as ArrayBufferViewConstructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n\n const { byteOffset, byteLength } = view;\n\n const minimumFill = min * elementSize;\n assert(minimumFill >= elementSize && minimumFill <= byteLength);\n assert(minimumFill % elementSize === 0);\n\n let buffer: ArrayBuffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n } catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n\n const pullIntoDescriptor: BYOBPullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInClosedState(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.bytesFilled % firstDescriptor.elementSize === 0);\n\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n}\n\nfunction ReadableByteStreamControllerRespondInReadableState(controller: ReadableByteStreamController,\n bytesWritten: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n pullIntoDescriptor.buffer,\n end - remainderSize,\n remainderSize\n );\n }\n\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInternal(controller: ReadableByteStreamController, bytesWritten: number) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n assert(CanTransferArrayBuffer(firstDescriptor.buffer));\n\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n assert(bytesWritten === 0);\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n } else {\n assert(state === 'readable');\n assert(bytesWritten > 0);\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerShiftPendingPullInto(\n controller: ReadableByteStreamController\n): PullIntoDescriptor {\n assert(controller._byobRequest === null);\n const descriptor = controller._pendingPullIntos.shift()!;\n return descriptor;\n}\n\nfunction ReadableByteStreamControllerShouldCallPull(controller: ReadableByteStreamController): boolean {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return false;\n }\n\n if (controller._closeRequested) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableByteStreamControllerClearAlgorithms(controller: ReadableByteStreamController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\n\nexport function ReadableByteStreamControllerClose(controller: ReadableByteStreamController) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n\n return;\n }\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n throw e;\n }\n }\n\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n}\n\nexport function ReadableByteStreamControllerEnqueue(\n controller: ReadableByteStreamController,\n chunk: NonShared\n) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError(\n 'The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk'\n );\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n assert(controller._pendingPullIntos.length === 0);\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n } else {\n assert(controller._queue.length === 0);\n if (controller._pendingPullIntos.length > 0) {\n assert(controller._pendingPullIntos.peek().readerType === 'default');\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView as NonShared, false);\n }\n } else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n } else {\n assert(!IsReadableStreamLocked(stream));\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableByteStreamControllerError(controller: ReadableByteStreamController, e: any) {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableByteStreamControllerFillReadRequestFromQueue(\n controller: ReadableByteStreamController,\n readRequest: ReadRequest>\n) {\n assert(controller._queueTotalSize > 0);\n\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view as NonShared);\n}\n\nexport function ReadableByteStreamControllerGetBYOBRequest(\n controller: ReadableByteStreamController\n): ReadableStreamBYOBRequest | null {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer,\n firstDescriptor.byteOffset + firstDescriptor.bytesFilled,\n firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n\n const byobRequest: ReadableStreamBYOBRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view as NonShared);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n}\n\nfunction ReadableByteStreamControllerGetDesiredSize(controller: ReadableByteStreamController): number | null {\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nexport function ReadableByteStreamControllerRespond(controller: ReadableByteStreamController, bytesWritten: number) {\n assert(controller._pendingPullIntos.length > 0);\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n}\n\nexport function ReadableByteStreamControllerRespondWithNewView(controller: ReadableByteStreamController,\n view: NonShared) {\n assert(controller._pendingPullIntos.length > 0);\n assert(!IsDetachedBuffer(view.buffer));\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (view.byteLength === 0) {\n throw new TypeError(\n 'The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'\n );\n }\n }\n\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n}\n\nexport function SetUpReadableByteStreamController(stream: ReadableByteStream,\n controller: ReadableByteStreamController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n autoAllocateChunkSize: number | undefined) {\n assert(stream._readableStreamController === undefined);\n if (autoAllocateChunkSize !== undefined) {\n assert(NumberIsInteger(autoAllocateChunkSize));\n assert(autoAllocateChunkSize > 0);\n }\n\n controller._controlledReadableByteStream = stream;\n\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._byobRequest = null;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._closeRequested = false;\n controller._started = false;\n\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n\n controller._pendingPullIntos = new SimpleQueue();\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableByteStreamControllerFromUnderlyingSource(\n stream: ReadableByteStream,\n underlyingByteSource: ValidatedUnderlyingByteSource,\n highWaterMark: number\n) {\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n\n SetUpReadableByteStreamController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize\n );\n}\n\nfunction SetUpReadableStreamBYOBRequest(request: ReadableStreamBYOBRequest,\n controller: ReadableByteStreamController,\n view: NonShared) {\n assert(IsReadableByteStreamController(controller));\n assert(typeof view === 'object');\n assert(ArrayBuffer.isView(view));\n assert(!IsDetachedBuffer(view.buffer));\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n}\n\n// Helper functions for the ReadableStreamBYOBRequest.\n\nfunction byobRequestBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n}\n\n// Helper functions for the ReadableByteStreamController.\n\nfunction byteStreamControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n}\n","import { assertDictionary, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from '../readable-stream/reader-options';\n\nexport function convertReaderOptions(options: ReadableStreamGetReaderOptions | null | undefined,\n context: string): ReadableStreamGetReaderOptions {\n assertDictionary(options, context);\n const mode = options?.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n}\n\nfunction convertReadableStreamReaderMode(mode: string, context: string): 'byob' {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n}\n\nexport function convertByobReadOptions(\n options: ReadableStreamBYOBReaderReadOptions | null | undefined,\n context: string\n): ValidatedReadableStreamBYOBReaderReadOptions {\n assertDictionary(options, context);\n const min = options?.min ?? 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(\n min,\n `${context} has member 'min' that`\n )\n };\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, type ReadableByteStream, type ReadableStream } from '../readable-stream';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamController,\n ReadableByteStreamControllerPullInto\n} from './byte-stream-controller';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\nimport { IsDetachedBuffer } from '../abstract-ops/ecmascript';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from './reader-options';\nimport { convertByobReadOptions } from '../validators/reader-options';\nimport { isDataView, type NonShared, type TypedArray } from '../helpers/array-buffer-view';\n\n/**\n * A result returned by {@link ReadableStreamBYOBReader.read}.\n *\n * @public\n */\nexport type ReadableStreamBYOBReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value: T | undefined;\n};\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamBYOBReader(stream: ReadableByteStream): ReadableStreamBYOBReader {\n return new ReadableStreamBYOBReader(stream as ReadableStream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadIntoRequest>(\n stream: ReadableByteStream,\n readIntoRequest: ReadIntoRequest\n): void {\n assert(IsReadableStreamBYOBReader(stream._reader));\n assert(stream._state === 'readable' || stream._state === 'closed');\n\n (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);\n}\n\nexport function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,\n chunk: ArrayBufferView,\n done: boolean) {\n const reader = stream._reader as ReadableStreamBYOBReader;\n\n assert(reader._readIntoRequests.length > 0);\n\n const readIntoRequest = reader._readIntoRequests.shift()!;\n if (done) {\n readIntoRequest._closeSteps(chunk);\n } else {\n readIntoRequest._chunkSteps(chunk);\n }\n}\n\nexport function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {\n return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;\n}\n\nexport function ReadableStreamHasBYOBReader(stream: ReadableByteStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadIntoRequest> {\n _chunkSteps(chunk: T): void;\n\n _closeSteps(chunk: T | undefined): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamBYOBReader {\n /** @internal */\n _ownerReadableStream!: ReadableByteStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readIntoRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readIntoRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Attempts to reads bytes into view, and returns a promise resolved with the result.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(\n view: T,\n options?: ReadableStreamBYOBReaderReadOptions\n ): Promise>;\n read>(\n view: T,\n rawOptions: ReadableStreamBYOBReaderReadOptions | null | undefined = {}\n ): Promise> {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n\n let options: ValidatedReadableStreamBYOBReaderReadOptions;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > (view as unknown as TypedArray).length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n } else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamBYOBReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest: ReadIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamBYOBReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBReader;\n}\n\nexport function ReadableStreamBYOBReaderRead>(\n reader: ReadableStreamBYOBReader,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n } else {\n ReadableByteStreamControllerPullInto(\n stream._readableStreamController as ReadableByteStreamController,\n view,\n min,\n readIntoRequest\n );\n }\n}\n\nexport function ReadableStreamBYOBReaderRelease(reader: ReadableStreamBYOBReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n}\n\nexport function ReadableStreamBYOBReaderErrorReadIntoRequests(reader: ReadableStreamBYOBReader, e: any) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamBYOBReader.\n\nfunction byobReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport NumberIsNaN from '../../stub/number-isnan';\n\nexport function ExtractHighWaterMark(strategy: QueuingStrategy, defaultHWM: number): number {\n const { highWaterMark } = strategy;\n\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n\n return highWaterMark;\n}\n\nexport function ExtractSizeAlgorithm(strategy: QueuingStrategy): QueuingStrategySizeCallback {\n const { size } = strategy;\n\n if (!size) {\n return () => 1;\n }\n\n return size;\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport { assertDictionary, assertFunction, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategy(init: QueuingStrategy | null | undefined,\n context: string): QueuingStrategy {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n const size = init?.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n}\n\nfunction convertQueuingStrategySize(fn: QueuingStrategySizeCallback,\n context: string): QueuingStrategySizeCallback {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from '../writable-stream/underlying-sink';\nimport { WritableStreamDefaultController } from '../writable-stream';\n\nexport function convertUnderlyingSink(original: UnderlyingSink | null,\n context: string): ValidatedUnderlyingSink {\n assertDictionary(original, context);\n const abort = original?.abort;\n const close = original?.close;\n const start = original?.start;\n const type = original?.type;\n const write = original?.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original!, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original!, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original!, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original!, `${context} has member 'write' that`),\n type\n };\n}\n\nfunction convertUnderlyingSinkAbortCallback(\n fn: UnderlyingSinkAbortCallback,\n original: UnderlyingSink,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSinkCloseCallback(\n fn: UnderlyingSinkCloseCallback,\n original: UnderlyingSink,\n context: string\n): () => Promise {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n}\n\nfunction convertUnderlyingSinkStartCallback(\n fn: UnderlyingSinkStartCallback,\n original: UnderlyingSink,\n context: string\n): UnderlyingSinkStartCallback {\n assertFunction(fn, context);\n return (controller: WritableStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSinkWriteCallback(\n fn: UnderlyingSinkWriteCallback,\n original: UnderlyingSink,\n context: string\n): (chunk: W, controller: WritableStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: W, controller: WritableStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n","import { IsWritableStream, WritableStream } from '../writable-stream';\n\nexport function assertWritableStream(x: unknown, context: string): asserts x is WritableStream {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n}\n","/**\n * A signal object that allows you to communicate with a request and abort it if required\n * via its associated `AbortController` object.\n *\n * @remarks\n * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @public\n */\nexport interface AbortSignal {\n /**\n * Whether the request is aborted.\n */\n readonly aborted: boolean;\n\n /**\n * If aborted, returns the reason for aborting.\n */\n readonly reason?: any;\n\n /**\n * Add an event listener to be triggered when this signal becomes aborted.\n */\n addEventListener(type: 'abort', listener: () => void): void;\n\n /**\n * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}.\n */\n removeEventListener(type: 'abort', listener: () => void): void;\n}\n\nexport function isAbortSignal(value: unknown): value is AbortSignal {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof (value as AbortSignal).aborted === 'boolean';\n } catch {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n}\n\n/**\n * A controller object that allows you to abort an `AbortSignal` when desired.\n *\n * @remarks\n * This interface is compatible with the `AbortController` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @internal\n */\nexport interface AbortController {\n readonly signal: AbortSignal;\n\n abort(reason?: any): void;\n}\n\ninterface AbortControllerConstructor {\n new(): AbortController;\n}\n\nconst supportsAbortController = typeof (AbortController as any) === 'function';\n\n/**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\nexport function createAbortController(): AbortController | undefined {\n if (supportsAbortController) {\n return new (AbortController as AbortControllerConstructor)();\n }\n return undefined;\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponPromise\n} from './helpers/webidl';\nimport {\n DequeueValue,\n EnqueueValueWithSize,\n PeekQueueValue,\n type QueuePair,\n ResetQueue\n} from './abstract-ops/queue-with-sizes';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { SimpleQueue } from './simple-queue';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { AbortSteps, ErrorSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from './writable-stream/underlying-sink';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertUnderlyingSink } from './validators/underlying-sink';\nimport { assertWritableStream } from './validators/writable-stream';\nimport { type AbortController, type AbortSignal, createAbortController } from './abort-signal';\n\ntype WritableStreamState = 'writable' | 'closed' | 'erroring' | 'errored';\n\ninterface WriteOrCloseRequest {\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n}\n\ntype WriteRequest = WriteOrCloseRequest;\ntype CloseRequest = WriteOrCloseRequest;\n\ninterface PendingAbortRequest {\n _promise: Promise;\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n _reason: any;\n _wasAlreadyErroring: boolean;\n}\n\n/**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\nclass WritableStream {\n /** @internal */\n _state!: WritableStreamState;\n /** @internal */\n _storedError: any;\n /** @internal */\n _writer: WritableStreamDefaultWriter | undefined;\n /** @internal */\n _writableStreamController!: WritableStreamDefaultController;\n /** @internal */\n _writeRequests!: SimpleQueue;\n /** @internal */\n _inFlightWriteRequest: WriteRequest | undefined;\n /** @internal */\n _closeRequest: CloseRequest | undefined;\n /** @internal */\n _inFlightCloseRequest: CloseRequest | undefined;\n /** @internal */\n _pendingAbortRequest: PendingAbortRequest | undefined;\n /** @internal */\n _backpressure!: boolean;\n\n constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSink: UnderlyingSink | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n } else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n\n InitializeWritableStream(this);\n\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked(): boolean {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsWritableStreamLocked(this);\n }\n\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('abort'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n\n return WritableStreamAbort(this, reason);\n }\n\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('close'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamClose(this);\n }\n\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter(): WritableStreamDefaultWriter {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('getWriter');\n }\n\n return AcquireWritableStreamDefaultWriter(this);\n }\n}\n\nObject.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(WritableStream.prototype.abort, 'abort');\nsetFunctionName(WritableStream.prototype.close, 'close');\nsetFunctionName(WritableStream.prototype.getWriter, 'getWriter');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n}\n\nexport {\n AcquireWritableStreamDefaultWriter,\n CreateWritableStream,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamDefaultControllerErrorIfNeeded,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite,\n WritableStreamCloseQueuedOrInFlight\n};\n\nexport type {\n UnderlyingSink,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkAbortCallback\n};\n\n// Abstract operations for the WritableStream.\n\nfunction AcquireWritableStreamDefaultWriter(stream: WritableStream): WritableStreamDefaultWriter {\n return new WritableStreamDefaultWriter(stream);\n}\n\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: WritableStream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n\n const controller: WritableStreamDefaultController = Object.create(WritableStreamDefaultController.prototype);\n\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm,\n abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n}\n\nfunction InitializeWritableStream(stream: WritableStream) {\n stream._state = 'writable';\n\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n\n stream._writer = undefined;\n\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined!;\n\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n}\n\nfunction IsWritableStream(x: unknown): x is WritableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n\n return x instanceof WritableStream;\n}\n\nfunction IsWritableStreamLocked(stream: WritableStream): boolean {\n assert(IsWritableStream(stream));\n\n if (stream._writer === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamAbort(stream: WritableStream, reason: any): Promise {\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n stream._writableStreamController._abortController?.abort(reason);\n\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state as WritableStreamState;\n\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined!,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest!._promise = promise;\n\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n\n return promise;\n}\n\nfunction WritableStreamClose(stream: WritableStream): Promise {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(\n `The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n\n assert(state === 'writable' || state === 'erroring');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const promise = newPromise((resolve, reject) => {\n const closeRequest: CloseRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._closeRequest = closeRequest;\n });\n\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n\n return promise;\n}\n\n// WritableStream API exposed for controllers.\n\nfunction WritableStreamAddWriteRequest(stream: WritableStream): Promise {\n assert(IsWritableStreamLocked(stream));\n assert(stream._state === 'writable');\n\n const promise = newPromise((resolve, reject) => {\n const writeRequest: WriteRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._writeRequests.push(writeRequest);\n });\n\n return promise;\n}\n\nfunction WritableStreamDealWithRejection(stream: WritableStream, error: any) {\n const state = stream._state;\n\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n\n assert(state === 'erroring');\n WritableStreamFinishErroring(stream);\n}\n\nfunction WritableStreamStartErroring(stream: WritableStream, reason: any) {\n assert(stream._storedError === undefined);\n assert(stream._state === 'writable');\n\n const controller = stream._writableStreamController;\n assert(controller !== undefined);\n\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n}\n\nfunction WritableStreamFinishErroring(stream: WritableStream) {\n assert(stream._state === 'erroring');\n assert(!WritableStreamHasOperationMarkedInFlight(stream));\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(\n promise,\n () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n },\n (reason: any) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n}\n\nfunction WritableStreamFinishInFlightWrite(stream: WritableStream) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n}\n\nfunction WritableStreamFinishInFlightWriteWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._reject(error);\n stream._inFlightWriteRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n WritableStreamDealWithRejection(stream, error);\n}\n\nfunction WritableStreamFinishInFlightClose(stream: WritableStream) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n\n const state = stream._state;\n\n assert(state === 'writable' || state === 'erroring');\n\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n\n stream._state = 'closed';\n\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n\n assert(stream._pendingAbortRequest === undefined);\n assert(stream._storedError === undefined);\n}\n\nfunction WritableStreamFinishInFlightCloseWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._reject(error);\n stream._inFlightCloseRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n}\n\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream: WritableStream): boolean {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamHasOperationMarkedInFlight(stream: WritableStream): boolean {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamMarkCloseRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightCloseRequest === undefined);\n assert(stream._closeRequest !== undefined);\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n}\n\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightWriteRequest === undefined);\n assert(stream._writeRequests.length !== 0);\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\n\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream: WritableStream) {\n assert(stream._state === 'errored');\n if (stream._closeRequest !== undefined) {\n assert(stream._inFlightCloseRequest === undefined);\n\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n}\n\nfunction WritableStreamUpdateBackpressure(stream: WritableStream, backpressure: boolean) {\n assert(stream._state === 'writable');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n } else {\n assert(!backpressure);\n\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n\n stream._backpressure = backpressure;\n}\n\n/**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\nexport class WritableStreamDefaultWriter {\n /** @internal */\n _ownerWritableStream: WritableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _closedPromiseState!: 'pending' | 'resolved' | 'rejected';\n /** @internal */\n _readyPromise!: Promise;\n /** @internal */\n _readyPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _readyPromise_reject?: (reason: any) => void;\n /** @internal */\n _readyPromiseState!: 'pending' | 'fulfilled' | 'rejected';\n\n constructor(stream: WritableStream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n\n this._ownerWritableStream = stream;\n stream._writer = this;\n\n const state = stream._state;\n\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n } else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n } else {\n assert(state === 'errored');\n\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize(): number | null {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n\n return this._readyPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamDefaultWriterClose(this);\n }\n\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock(): void {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return;\n }\n\n assert(stream._writer !== undefined);\n\n WritableStreamDefaultWriterRelease(this);\n }\n\n /**\n * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully,\n * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return\n * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes\n * errored before the writing process is initiated.\n *\n * Note that what \"success\" means is up to the underlying sink; it might indicate simply that the chunk has been\n * accepted, and not necessarily that it is safely saved to its ultimate destination.\n */\n write(chunk: W): Promise;\n write(chunk: W = undefined!): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n});\nsetFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\nsetFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\nsetFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\nsetFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n}\n\n// Abstract operations for the WritableStreamDefaultWriter.\n\nfunction IsWritableStreamDefaultWriter(x: any): x is WritableStreamDefaultWriter {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultWriter;\n}\n\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultWriterAbort(writer: WritableStreamDefaultWriter, reason: any) {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamAbort(stream, reason);\n}\n\nfunction WritableStreamDefaultWriterClose(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamClose(stream);\n}\n\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n return WritableStreamDefaultWriterClose(writer);\n}\n\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n } else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n } else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterGetDesiredSize(writer: WritableStreamDefaultWriter): number | null {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n\n if (state === 'closed') {\n return 0;\n }\n\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\n\nfunction WritableStreamDefaultWriterRelease(writer: WritableStreamDefaultWriter) {\n const stream = writer._ownerWritableStream;\n assert(stream !== undefined);\n assert(stream._writer === writer);\n\n const releasedError = new TypeError(\n `Writer was released and can no longer be used to monitor the stream's closedness`);\n\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n\n stream._writer = undefined;\n writer._ownerWritableStream = undefined!;\n}\n\nfunction WritableStreamDefaultWriterWrite(writer: WritableStreamDefaultWriter, chunk: W): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const controller = stream._writableStreamController;\n\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable');\n\n const promise = WritableStreamAddWriteRequest(stream);\n\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n\n return promise;\n}\n\nconst closeSentinel: unique symbol = {} as any;\n\ntype QueueRecord = W | typeof closeSentinel;\n\n/**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\nexport class WritableStreamDefaultController {\n /** @internal */\n _controlledWritableStream!: WritableStream;\n /** @internal */\n _queue!: SimpleQueue>>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _abortReason: any;\n /** @internal */\n _abortController: AbortController | undefined;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _writeAlgorithm!: (chunk: W) => Promise;\n /** @internal */\n _closeAlgorithm!: () => Promise;\n /** @internal */\n _abortAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason(): any {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('abortReason');\n }\n return this._abortReason;\n }\n\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal(): AbortSignal {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e: any = undefined): void {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n\n WritableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [AbortSteps](reason: any): Promise {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations implementing interface required by the WritableStream.\n\nfunction IsWritableStreamDefaultController(x: any): x is WritableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultController;\n}\n\nfunction SetUpWritableStreamDefaultController(stream: WritableStream,\n controller: WritableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(IsWritableStream(stream));\n assert(stream._writableStreamController === undefined);\n\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(\n startPromise,\n () => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n r => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n }\n );\n}\n\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream: WritableStream,\n underlyingSink: ValidatedUnderlyingSink,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let writeAlgorithm: (chunk: W) => Promise;\n let closeAlgorithm: () => Promise;\n let abortAlgorithm: (reason: any) => Promise;\n\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write!(chunk, controller);\n } else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close!();\n } else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort!(reason);\n } else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpWritableStreamDefaultController(\n stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\nfunction WritableStreamDefaultControllerClearAlgorithms(controller: WritableStreamDefaultController) {\n controller._writeAlgorithm = undefined!;\n controller._closeAlgorithm = undefined!;\n controller._abortAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\nfunction WritableStreamDefaultControllerClose(controller: WritableStreamDefaultController) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\nfunction WritableStreamDefaultControllerGetChunkSize(controller: WritableStreamDefaultController,\n chunk: W): number {\n try {\n return controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n}\n\nfunction WritableStreamDefaultControllerGetDesiredSize(controller: WritableStreamDefaultController): number {\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nfunction WritableStreamDefaultControllerWrite(controller: WritableStreamDefaultController,\n chunk: W,\n chunkSize: number) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\n// Abstract operations for the WritableStreamDefaultController.\n\nfunction WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n if (!controller._started) {\n return;\n }\n\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n\n const state = stream._state;\n assert(state !== 'closed' && state !== 'errored');\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n\n if (controller._queue.length === 0) {\n return;\n }\n\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n } else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n}\n\nfunction WritableStreamDefaultControllerErrorIfNeeded(controller: WritableStreamDefaultController, error: any) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n}\n\nfunction WritableStreamDefaultControllerProcessClose(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkCloseRequestInFlight(stream);\n\n DequeueValue(controller);\n assert(controller._queue.length === 0);\n\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(\n sinkClosePromise,\n () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n },\n reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerProcessWrite(controller: WritableStreamDefaultController, chunk: W) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(\n sinkWritePromise,\n () => {\n WritableStreamFinishInFlightWrite(stream);\n\n const state = stream._state;\n assert(state === 'writable' || state === 'erroring');\n\n DequeueValue(controller);\n\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerGetBackpressure(controller: WritableStreamDefaultController): boolean {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n}\n\n// A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultControllerError(controller: WritableStreamDefaultController, error: any) {\n const stream = controller._controlledWritableStream;\n\n assert(stream._state === 'writable');\n\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n}\n\n// Helper functions for the WritableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n}\n\n// Helper functions for the WritableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n}\n\n\n// Helper functions for the WritableStreamDefaultWriter.\n\nfunction defaultWriterBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n}\n\nfunction defaultWriterLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n}\n\nfunction defaultWriterClosedPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n}\n\nfunction defaultWriterClosedPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n}\n\nfunction defaultWriterClosedPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n}\n\nfunction defaultWriterClosedPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._closedPromise_resolve === undefined);\n assert(writer._closedPromise_reject === undefined);\n assert(writer._closedPromiseState !== 'pending');\n\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n}\n\nfunction defaultWriterReadyPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n}\n\nfunction defaultWriterReadyPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n}\n\nfunction defaultWriterReadyPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n}\n\nfunction defaultWriterReadyPromiseReset(writer: WritableStreamDefaultWriter) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitialize(writer);\n}\n\nfunction defaultWriterReadyPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n}\n","/// \n\nfunction getGlobals(): typeof globalThis | undefined {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n } else if (typeof self !== 'undefined') {\n return self;\n } else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n}\n\nexport const globals = getGlobals();\n","/// \nimport { globals } from '../globals';\nimport { setFunctionName } from '../lib/helpers/miscellaneous';\n\ninterface DOMException extends Error {\n name: string;\n message: string;\n}\n\ntype DOMExceptionConstructor = new (message?: string, name?: string) => DOMException;\n\nfunction isDOMExceptionConstructor(ctor: unknown): ctor is DOMExceptionConstructor {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if ((ctor as DOMExceptionConstructor).name !== 'DOMException') {\n return false;\n }\n try {\n new (ctor as DOMExceptionConstructor)();\n return true;\n } catch {\n return false;\n }\n}\n\n/**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\nfunction getFromGlobal(): DOMExceptionConstructor | undefined {\n const ctor = globals?.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n}\n\n/**\n * Support:\n * - All platforms\n */\nfunction createPolyfill(): DOMExceptionConstructor {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(this: DOMException, message?: string, name?: string) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n } as any;\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-redeclare\nconst DOMException: DOMExceptionConstructor = getFromGlobal() || createPolyfill();\n\nexport { DOMException };\n","import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';\nimport { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireWritableStreamDefaultWriter,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamCloseQueuedOrInFlight,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite\n} from '../writable-stream';\nimport assert from '../../stub/assert';\nimport {\n newPromise,\n PerformPromiseThen,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponFulfillment,\n uponPromise,\n uponRejection\n} from '../helpers/webidl';\nimport { noop } from '../../utils';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\nimport { DOMException } from '../../stub/dom-exception';\n\nexport function ReadableStreamPipeTo(source: ReadableStream,\n dest: WritableStream,\n preventClose: boolean,\n preventAbort: boolean,\n preventCancel: boolean,\n signal: AbortSignal | undefined): Promise {\n assert(IsReadableStream(source));\n assert(IsWritableStream(dest));\n assert(typeof preventClose === 'boolean');\n assert(typeof preventAbort === 'boolean');\n assert(typeof preventCancel === 'boolean');\n assert(signal === undefined || isAbortSignal(signal));\n assert(!IsReadableStreamLocked(source));\n assert(!IsWritableStreamLocked(dest));\n\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n\n source._disturbed = true;\n\n let shuttingDown = false;\n\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n\n return newPromise((resolve, reject) => {\n let abortAlgorithm: () => void;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions: Array<() => Promise> = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n\n signal.addEventListener('abort', abortAlgorithm);\n }\n\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done: boolean) {\n if (done) {\n resolveLoop();\n } else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n\n next(false);\n });\n }\n\n function pipeStep(): Promise {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(\n reader,\n {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n }\n );\n });\n });\n }\n\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n } else {\n shutdown();\n }\n return null;\n });\n\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n } else {\n shutdown(true, destClosed);\n }\n }\n\n setPromiseIsHandledToTrue(pipeLoop());\n\n function waitForWritesToFinish(): Promise {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(\n currentWrite,\n () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined\n );\n }\n\n function isOrBecomesErrored(stream: ReadableStream | WritableStream,\n promise: Promise,\n action: (reason: any) => null) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n } else {\n uponRejection(promise, action);\n }\n }\n\n function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise, action: () => null) {\n if (stream._state === 'closed') {\n action();\n } else {\n uponFulfillment(promise, action);\n }\n }\n\n function shutdownWithAction(action: () => Promise, originalIsError?: boolean, originalError?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n } else {\n doTheRest();\n }\n\n function doTheRest(): null {\n uponPromise(\n action(),\n () => finalize(originalIsError, originalError),\n newError => finalize(true, newError)\n );\n return null;\n }\n }\n\n function shutdown(isError?: boolean, error?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n } else {\n finalize(isError, error);\n }\n }\n\n function finalize(isError?: boolean, error?: any): null {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n } else {\n resolve(undefined);\n }\n\n return null;\n }\n });\n}\n","import type { QueuingStrategySizeCallback } from '../queuing-strategy';\nimport assert from '../../stub/assert';\nimport { DequeueValue, EnqueueValueWithSize, type QueuePair, ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n type ReadRequest\n} from './default-reader';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsReadableStreamLocked, ReadableStream, ReadableStreamClose, ReadableStreamError } from '../readable-stream';\nimport type { ValidatedUnderlyingSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\n\n/**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableStreamDefaultController {\n /** @internal */\n _controlledReadableStream!: ReadableStream;\n /** @internal */\n _queue!: SimpleQueue>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('close');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n\n ReadableStreamDefaultControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the controlled readable stream.\n */\n enqueue(chunk: R): void;\n enqueue(chunk: R = undefined!): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n ReadableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest): void {\n const stream = this._controlledReadableStream;\n\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n } else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n\n readRequest._chunkSteps(chunk);\n } else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n // Do nothing.\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\nsetFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableStreamDefaultController.\n\nfunction IsReadableStreamDefaultController(x: any): x is ReadableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultController;\n}\n\nfunction ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController): void {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController): boolean {\n const stream = controller._controlledReadableStream;\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\n// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n\nexport function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n controller._closeRequested = true;\n\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n}\n\nexport function ReadableStreamDefaultControllerEnqueue(\n controller: ReadableStreamDefaultController,\n chunk: R\n): void {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n } else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController, e: any) {\n const stream = controller._controlledReadableStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ResetQueue(controller);\n\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableStreamDefaultControllerGetDesiredSize(\n controller: ReadableStreamDefaultController\n): number | null {\n const state = controller._controlledReadableStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\n// This is used in the implementation of TransformStream.\nexport function ReadableStreamDefaultControllerHasBackpressure(\n controller: ReadableStreamDefaultController\n): boolean {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n\n return true;\n}\n\nexport function ReadableStreamDefaultControllerCanCloseOrEnqueue(\n controller: ReadableStreamDefaultController\n): boolean {\n const state = controller._controlledReadableStream._state;\n\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n\n return false;\n}\n\nexport function SetUpReadableStreamDefaultController(stream: ReadableStream,\n controller: ReadableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(stream._readableStreamController === undefined);\n\n controller._controlledReadableStream = stream;\n\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n stream: ReadableStream,\n underlyingSource: ValidatedUnderlyingSource,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback\n) {\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// Helper functions for the ReadableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n}\n","import {\n CreateReadableByteStream,\n CreateReadableStream,\n type DefaultReadableStream,\n IsReadableStream,\n type ReadableByteStream,\n ReadableStream,\n ReadableStreamCancel,\n type ReadableStreamReader\n} from '../readable-stream';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadRequest\n} from './default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReaderRead,\n type ReadIntoRequest\n} from './byob-reader';\nimport assert from '../../stub/assert';\nimport { newPromise, promiseResolvedWith, queueMicrotask, uponRejection } from '../helpers/webidl';\nimport {\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError\n} from './default-controller';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamControllerClose,\n ReadableByteStreamControllerEnqueue,\n ReadableByteStreamControllerError,\n ReadableByteStreamControllerGetBYOBRequest,\n ReadableByteStreamControllerRespond,\n ReadableByteStreamControllerRespondWithNewView\n} from './byte-stream-controller';\nimport { CreateArrayFromList } from '../abstract-ops/ecmascript';\nimport { CloneAsUint8Array } from '../abstract-ops/miscellaneous';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function ReadableStreamTee(stream: ReadableStream,\n cloneForBranch2: boolean): [ReadableStream, ReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream as unknown as ReadableByteStream) as\n unknown as [ReadableStream, ReadableStream];\n }\n return ReadableStreamDefaultTee(stream, cloneForBranch2);\n}\n\nexport function ReadableStreamDefaultTee(\n stream: ReadableStream,\n cloneForBranch2: boolean\n): [DefaultReadableStream, DefaultReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n\n const reader = AcquireReadableStreamDefaultReader(stream);\n\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: DefaultReadableStream;\n let branch2: DefaultReadableStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function pullAlgorithm(): Promise {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm() {\n // do nothing\n }\n\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n\n uponRejection(reader._closedPromise, (r: any) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n\n return [branch1, branch2];\n}\n\nexport function ReadableByteStreamTee(stream: ReadableByteStream): [ReadableByteStream, ReadableByteStream] {\n assert(IsReadableStream(stream));\n assert(IsReadableByteStreamController(stream._readableStreamController));\n\n let reader: ReadableStreamReader> = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: ReadableByteStream;\n let branch2: ReadableByteStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function forwardReaderError(thisReader: ReadableStreamReader>) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n assert(reader._readIntoRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n\n const readRequest: ReadRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n\n function pullWithBYOBReader(view: NonShared, forBranch2: boolean) {\n if (IsReadableStreamDefaultReader>(reader)) {\n assert(reader._readRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n\n const readIntoRequest: ReadIntoRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n } else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n\n if (chunk !== undefined) {\n assert(chunk.byteLength === 0);\n\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n\n function pull1Algorithm(): Promise {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, false);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function pull2Algorithm(): Promise {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, true);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm(): void {\n return;\n }\n\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n\n forwardReaderError(reader);\n\n return [branch1, branch2];\n}\n","import { typeIsObject } from '../helpers/miscellaneous';\nimport type { ReadableStreamDefaultReadResult } from './default-reader';\n\n/**\n * A common interface for a `ReadadableStream` implementation.\n *\n * @public\n */\nexport interface ReadableStreamLike {\n readonly locked: boolean;\n\n getReader(): ReadableStreamDefaultReaderLike;\n}\n\n/**\n * A common interface for a `ReadableStreamDefaultReader` implementation.\n *\n * @public\n */\nexport interface ReadableStreamDefaultReaderLike {\n readonly closed: Promise;\n\n cancel(reason?: any): Promise;\n\n read(): Promise>;\n\n releaseLock(): void;\n}\n\nexport function isReadableStreamLike(stream: unknown): stream is ReadableStreamLike {\n return typeIsObject(stream) && typeof (stream as ReadableStreamLike).getReader !== 'undefined';\n}\n","import { CreateReadableStream, type DefaultReadableStream } from '../readable-stream';\nimport {\n isReadableStreamLike,\n type ReadableStreamDefaultReaderLike,\n type ReadableStreamLike\n} from './readable-stream-like';\nimport { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue } from './default-controller';\nimport { GetIterator, GetMethod, IteratorComplete, IteratorNext, IteratorValue } from '../abstract-ops/ecmascript';\nimport { promiseRejectedWith, promiseResolvedWith, reflectCall, transformPromiseWith } from '../helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport { noop } from '../../utils';\n\nexport function ReadableStreamFrom(\n source: Iterable | AsyncIterable | ReadableStreamLike\n): DefaultReadableStream {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n}\n\nexport function ReadableStreamFromIterable(asyncIterable: Iterable | AsyncIterable): DefaultReadableStream {\n let stream: DefaultReadableStream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n const iterator = iteratorRecord.iterator;\n let returnMethod: (typeof iterator)['return'] | undefined;\n try {\n returnMethod = GetMethod(iterator, 'return');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult: IteratorResult | Promise>;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n\nexport function ReadableStreamFromDefaultReader(\n reader: ReadableStreamDefaultReaderLike\n): DefaultReadableStream {\n let stream: DefaultReadableStream;\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let readPromise;\n try {\n readPromise = reader.read();\n } catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n } catch (e) {\n return promiseRejectedWith(e);\n }\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n","import { assertDictionary, assertFunction, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamController,\n UnderlyingByteSource,\n UnderlyingDefaultOrByteSource,\n UnderlyingDefaultOrByteSourcePullCallback,\n UnderlyingDefaultOrByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n ValidatedUnderlyingDefaultOrByteSource\n} from '../readable-stream/underlying-source';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\n\nexport function convertUnderlyingDefaultOrByteSource(\n source: UnderlyingSource | UnderlyingByteSource | null,\n context: string\n): ValidatedUnderlyingDefaultOrByteSource {\n assertDictionary(source, context);\n const original = source as (UnderlyingDefaultOrByteSource | null);\n const autoAllocateChunkSize = original?.autoAllocateChunkSize;\n const cancel = original?.cancel;\n const pull = original?.pull;\n const start = original?.start;\n const type = original?.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(\n autoAllocateChunkSize,\n `${context} has member 'autoAllocateChunkSize' that`\n ),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original!, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original!, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n}\n\nfunction convertUnderlyingSourceCancelCallback(\n fn: UnderlyingSourceCancelCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSourcePullCallback(\n fn: UnderlyingDefaultOrByteSourcePullCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (controller: ReadableStreamController) => Promise {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSourceStartCallback(\n fn: UnderlyingDefaultOrByteSourceStartCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): UnderlyingDefaultOrByteSourceStartCallback {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertReadableStreamType(type: string, context: string): 'bytes' {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n}\n","import { assertDictionary } from './basic';\nimport type {\n ReadableStreamIteratorOptions,\n ValidatedReadableStreamIteratorOptions\n} from '../readable-stream/iterator-options';\n\nexport function convertIteratorOptions(options: ReadableStreamIteratorOptions | null | undefined,\n context: string): ValidatedReadableStreamIteratorOptions {\n assertDictionary(options, context);\n const preventCancel = options?.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n}\n","import { assertDictionary } from './basic';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from '../readable-stream/pipe-options';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\n\nexport function convertPipeOptions(options: StreamPipeOptions | null | undefined,\n context: string): ValidatedStreamPipeOptions {\n assertDictionary(options, context);\n const preventAbort = options?.preventAbort;\n const preventCancel = options?.preventCancel;\n const preventClose = options?.preventClose;\n const signal = options?.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n}\n\nfunction assertAbortSignal(signal: unknown, context: string): asserts signal is AbortSignal {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n}\n","import { assertDictionary, assertRequiredField } from './basic';\nimport { ReadableStream } from '../readable-stream';\nimport { WritableStream } from '../writable-stream';\nimport { assertReadableStream } from './readable-stream';\nimport { assertWritableStream } from './writable-stream';\n\nexport function convertReadableWritablePair(\n pair: { readable: RS; writable: WS } | null | undefined,\n context: string\n): { readable: RS; writable: WS } {\n assertDictionary(pair, context);\n\n const readable = pair?.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n\n const writable = pair?.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n\n return { readable, writable };\n}\n","import assert from '../stub/assert';\nimport {\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith\n} from './helpers/webidl';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { AcquireReadableStreamAsyncIterator, type ReadableStreamAsyncIterator } from './readable-stream/async-iterator';\nimport { defaultReaderClosedPromiseReject, defaultReaderClosedPromiseResolve } from './readable-stream/generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderErrorReadRequests,\n type ReadableStreamDefaultReadResult\n} from './readable-stream/default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBReaderErrorReadIntoRequests,\n type ReadableStreamBYOBReadResult\n} from './readable-stream/byob-reader';\nimport { ReadableStreamPipeTo } from './readable-stream/pipe';\nimport { ReadableStreamTee } from './readable-stream/tee';\nimport { ReadableStreamFrom } from './readable-stream/from';\nimport { IsWritableStream, IsWritableStreamLocked, WritableStream } from './writable-stream';\nimport { SimpleQueue } from './simple-queue';\nimport {\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n SetUpReadableByteStreamController,\n SetUpReadableByteStreamControllerFromUnderlyingSource\n} from './readable-stream/byte-stream-controller';\nimport {\n ReadableStreamDefaultController,\n SetUpReadableStreamDefaultController,\n SetUpReadableStreamDefaultControllerFromUnderlyingSource\n} from './readable-stream/default-controller';\nimport type {\n UnderlyingByteSource,\n UnderlyingByteSourcePullCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceStartCallback\n} from './readable-stream/underlying-source';\nimport { noop } from '../utils';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { CreateArrayFromList, SymbolAsyncIterator } from './abstract-ops/ecmascript';\nimport { CancelSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertUnderlyingDefaultOrByteSource } from './validators/underlying-source';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions\n} from './readable-stream/reader-options';\nimport { convertReaderOptions } from './validators/reader-options';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from './readable-stream/pipe-options';\nimport type { ReadableStreamIteratorOptions } from './readable-stream/iterator-options';\nimport { convertIteratorOptions } from './validators/iterator-options';\nimport { convertPipeOptions } from './validators/pipe-options';\nimport type { ReadableWritablePair } from './readable-stream/readable-writable-pair';\nimport { convertReadableWritablePair } from './validators/readable-writable-pair';\nimport type { ReadableStreamDefaultReaderLike, ReadableStreamLike } from './readable-stream/readable-stream-like';\nimport type { NonShared } from './helpers/array-buffer-view';\n\nexport type DefaultReadableStream = ReadableStream & {\n _readableStreamController: ReadableStreamDefaultController\n};\n\nexport type ReadableByteStream = ReadableStream> & {\n _readableStreamController: ReadableByteStreamController\n};\n\ntype ReadableStreamState = 'readable' | 'closed' | 'errored';\n\n/**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\nexport class ReadableStream implements AsyncIterable {\n /** @internal */\n _state!: ReadableStreamState;\n /** @internal */\n _reader: ReadableStreamReader | undefined;\n /** @internal */\n _storedError: any;\n /** @internal */\n _disturbed!: boolean;\n /** @internal */\n _readableStreamController!: ReadableStreamDefaultController | ReadableByteStreamController;\n\n constructor(underlyingSource: UnderlyingByteSource, strategy?: { highWaterMark?: number; size?: undefined });\n constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSource: UnderlyingSource | UnderlyingByteSource | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n } else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n\n InitializeReadableStream(this);\n\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(\n this as unknown as ReadableByteStream,\n underlyingSource,\n highWaterMark\n );\n } else {\n assert(underlyingSource.type === undefined);\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n this,\n underlyingSource,\n highWaterMark,\n sizeAlgorithm\n );\n }\n }\n\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked(): boolean {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsReadableStreamLocked(this);\n }\n\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('cancel'));\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n\n return ReadableStreamCancel(this, reason);\n }\n\n /**\n * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader.\n *\n * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams,\n * i.e. streams which were constructed specifically with the ability to handle \"bring your own buffer\" reading.\n * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its\n * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise\n * control over allocation.\n */\n getReader({ mode }: { mode: 'byob' }): ReadableStreamBYOBReader;\n /**\n * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader.\n * While the stream is locked, no other reader can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to consume a stream\n * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours\n * or cancel the stream, which would interfere with your abstraction.\n */\n getReader(): ReadableStreamDefaultReader;\n getReader(\n rawOptions: ReadableStreamGetReaderOptions | null | undefined = undefined\n ): ReadableStreamDefaultReader | ReadableStreamBYOBReader {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('getReader');\n }\n\n const options = convertReaderOptions(rawOptions, 'First parameter');\n\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n\n assert(options.mode === 'byob');\n return AcquireReadableStreamBYOBReader(this as unknown as ReadableByteStream);\n }\n\n /**\n * Provides a convenient, chainable way of piping this readable stream through a transform stream\n * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream\n * into the writable side of the supplied pair, and returns the readable side for further use.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeThrough(\n transform: { readable: RS; writable: WritableStream },\n options?: StreamPipeOptions\n ): RS;\n pipeThrough(\n rawTransform: { readable: RS; writable: WritableStream } | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}\n ): RS {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n\n const promise = ReadableStreamPipeTo(\n this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n\n setPromiseIsHandledToTrue(promise);\n\n return transform.readable;\n }\n\n /**\n * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under\n * various error conditions can be customized with a number of passed options. It returns a promise that fulfills\n * when the piping process completes successfully, or rejects if any errors were encountered.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise;\n pipeTo(destination: WritableStream | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('pipeTo'));\n }\n\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(\n new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)\n );\n }\n\n let options: ValidatedStreamPipeOptions;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')\n );\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')\n );\n }\n\n return ReadableStreamPipeTo(\n this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n }\n\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee(): [ReadableStream, ReadableStream] {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('tee');\n }\n\n const branches = ReadableStreamTee(this, false);\n return CreateArrayFromList(branches);\n }\n\n /**\n * Asynchronously iterates over the chunks in the stream's internal queue.\n *\n * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader.\n * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method\n * is called, e.g. by breaking out of the loop.\n *\n * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also\n * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing\n * `true` for the `preventCancel` option.\n */\n values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n values(rawOptions: ReadableStreamIteratorOptions | null | undefined = undefined): ReadableStreamAsyncIterator {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('values');\n }\n\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n\n /**\n * {@inheritDoc ReadableStream.values}\n */\n [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n\n [SymbolAsyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator {\n // Stub implementation, overridden below\n return this.values(options);\n }\n\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream {\n return ReadableStreamFrom(asyncIterable);\n }\n}\n\nObject.defineProperties(ReadableStream, {\n from: { enumerable: true }\n});\nObject.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(ReadableStream.from, 'from');\nsetFunctionName(ReadableStream.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStream.prototype.getReader, 'getReader');\nsetFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\nsetFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\nsetFunctionName(ReadableStream.prototype.tee, 'tee');\nsetFunctionName(ReadableStream.prototype.values, 'values');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n}\nObject.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n});\n\nexport type {\n ReadableStreamAsyncIterator,\n ReadableStreamDefaultReadResult,\n ReadableStreamBYOBReadResult,\n ReadableStreamBYOBReaderReadOptions,\n UnderlyingByteSource,\n UnderlyingSource,\n UnderlyingSourceStartCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceCancelCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingByteSourcePullCallback,\n StreamPipeOptions,\n ReadableWritablePair,\n ReadableStreamIteratorOptions,\n ReadableStreamLike,\n ReadableStreamDefaultReaderLike\n};\n\n// Abstract operations for the ReadableStream.\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1\n): DefaultReadableStream {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: DefaultReadableStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n\n return stream;\n}\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableByteStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise\n): ReadableByteStream {\n const stream: ReadableByteStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n\n return stream;\n}\n\nfunction InitializeReadableStream(stream: ReadableStream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n}\n\nexport function IsReadableStream(x: unknown): x is ReadableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStream;\n}\n\nexport function IsReadableStreamDisturbed(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n return stream._disturbed;\n}\n\nexport function IsReadableStreamLocked(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n if (stream._reader === undefined) {\n return false;\n }\n\n return true;\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamCancel(stream: ReadableStream, reason: any): Promise {\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n ReadableStreamClose(stream);\n\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n}\n\nexport function ReadableStreamClose(stream: ReadableStream): void {\n assert(stream._state === 'readable');\n\n stream._state = 'closed';\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseResolve(reader);\n\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n}\n\nexport function ReadableStreamError(stream: ReadableStream, e: any): void {\n assert(IsReadableStream(stream));\n assert(stream._state === 'readable');\n\n stream._state = 'errored';\n stream._storedError = e;\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseReject(reader, e);\n\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n } else {\n assert(IsReadableStreamBYOBReader(reader));\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n}\n\n// Readers\n\nexport type ReadableStreamReader = ReadableStreamDefaultReader | ReadableStreamBYOBReader;\n\nexport {\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader\n};\n\n// Controllers\n\nexport {\n ReadableStreamDefaultController,\n ReadableStreamBYOBRequest,\n ReadableByteStreamController\n};\n\n// Helper functions for the ReadableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n}\n","import type { QueuingStrategyInit } from '../queuing-strategy';\nimport { assertDictionary, assertRequiredField, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategyInit(init: QueuingStrategyInit | null | undefined,\n context: string): QueuingStrategyInit {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst byteLengthSizeFunction = (chunk: ArrayBufferView): number => {\n return chunk.byteLength;\n};\nsetFunctionName(byteLengthSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\nexport default class ByteLengthQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _byteLengthQueuingStrategyHighWaterMark: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size(): (chunk: ArrayBufferView) => number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n}\n\nObject.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the ByteLengthQueuingStrategy.\n\nfunction byteLengthBrandCheckException(name: string): TypeError {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n}\n\nexport function IsByteLengthQueuingStrategy(x: any): x is ByteLengthQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof ByteLengthQueuingStrategy;\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst countSizeFunction = (): 1 => {\n return 1;\n};\nsetFunctionName(countSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\nexport default class CountQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _countQueuingStrategyHighWaterMark!: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size(): (chunk: any) => 1 {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n}\n\nObject.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the CountQueuingStrategy.\n\nfunction countBrandCheckException(name: string): TypeError {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n}\n\nexport function IsCountQueuingStrategy(x: any): x is CountQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof CountQueuingStrategy;\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from '../transform-stream/transformer';\nimport { TransformStreamDefaultController } from '../transform-stream';\n\nexport function convertTransformer(original: Transformer | null,\n context: string): ValidatedTransformer {\n assertDictionary(original, context);\n const cancel = original?.cancel;\n const flush = original?.flush;\n const readableType = original?.readableType;\n const start = original?.start;\n const transform = original?.transform;\n const writableType = original?.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original!, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original!, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original!, `${context} has member 'transform' that`),\n writableType\n };\n}\n\nfunction convertTransformerFlushCallback(\n fn: TransformerFlushCallback,\n original: Transformer,\n context: string\n): (controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertTransformerStartCallback(\n fn: TransformerStartCallback,\n original: Transformer,\n context: string\n): TransformerStartCallback {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertTransformerTransformCallback(\n fn: TransformerTransformCallback,\n original: Transformer,\n context: string\n): (chunk: I, controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: I, controller: TransformStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n\nfunction convertTransformerCancelCallback(\n fn: TransformerCancelCallback,\n original: Transformer,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith,\n uponPromise\n} from './helpers/webidl';\nimport { CreateReadableStream, type DefaultReadableStream, ReadableStream } from './readable-stream';\nimport {\n ReadableStreamDefaultControllerCanCloseOrEnqueue,\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError,\n ReadableStreamDefaultControllerGetDesiredSize,\n ReadableStreamDefaultControllerHasBackpressure\n} from './readable-stream/default-controller';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { CreateWritableStream, WritableStream, WritableStreamDefaultControllerErrorIfNeeded } from './writable-stream';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from './transform-stream/transformer';\nimport { convertTransformer } from './validators/transformer';\n\n// Class TransformStream\n\n/**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\nexport class TransformStream {\n /** @internal */\n _writable!: WritableStream;\n /** @internal */\n _readable!: DefaultReadableStream;\n /** @internal */\n _backpressure!: boolean;\n /** @internal */\n _backpressureChangePromise!: Promise;\n /** @internal */\n _backpressureChangePromise_resolve!: () => void;\n /** @internal */\n _transformStreamController!: TransformStreamDefaultController;\n\n constructor(\n transformer?: Transformer,\n writableStrategy?: QueuingStrategy,\n readableStrategy?: QueuingStrategy\n );\n constructor(rawTransformer: Transformer | null | undefined = {},\n rawWritableStrategy: QueuingStrategy | null | undefined = {},\n rawReadableStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(\n this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm\n );\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n } else {\n startPromise_resolve(undefined);\n }\n }\n\n /**\n * The readable side of the transform stream.\n */\n get readable(): ReadableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n\n return this._readable;\n }\n\n /**\n * The writable side of the transform stream.\n */\n get writable(): WritableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n\n return this._writable;\n }\n}\n\nObject.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n}\n\nexport type {\n Transformer,\n TransformerCancelCallback,\n TransformerStartCallback,\n TransformerFlushCallback,\n TransformerTransformCallback\n};\n\n// Transform Stream Abstract Operations\n\nexport function CreateTransformStream(startAlgorithm: () => void | PromiseLike,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n writableHighWaterMark = 1,\n writableSizeAlgorithm: QueuingStrategySizeCallback = () => 1,\n readableHighWaterMark = 0,\n readableSizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(writableHighWaterMark));\n assert(IsNonNegativeNumber(readableHighWaterMark));\n\n const stream: TransformStream = Object.create(TransformStream.prototype);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n\n const startResult = startAlgorithm();\n startPromise_resolve(startResult);\n return stream;\n}\n\nfunction InitializeTransformStream(stream: TransformStream,\n startPromise: Promise,\n writableHighWaterMark: number,\n writableSizeAlgorithm: QueuingStrategySizeCallback,\n readableHighWaterMark: number,\n readableSizeAlgorithm: QueuingStrategySizeCallback) {\n function startAlgorithm(): Promise {\n return startPromise;\n }\n\n function writeAlgorithm(chunk: I): Promise {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n\n function abortAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n\n function closeAlgorithm(): Promise {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm,\n writableHighWaterMark, writableSizeAlgorithm);\n\n function pullAlgorithm(): Promise {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n\n function cancelAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined!;\n stream._backpressureChangePromise = undefined!;\n stream._backpressureChangePromise_resolve = undefined!;\n TransformStreamSetBackpressure(stream, true);\n\n stream._transformStreamController = undefined!;\n}\n\nfunction IsTransformStream(x: unknown): x is TransformStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n\n return x instanceof TransformStream;\n}\n\n// This is a no-op if both sides are already errored.\nfunction TransformStreamError(stream: TransformStream, e: any) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n}\n\nfunction TransformStreamErrorWritableAndUnblockWrite(stream: TransformStream, e: any) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n}\n\nfunction TransformStreamUnblockWrite(stream: TransformStream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. 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It can be negative, if the queue is over-full.\n */\n get desiredSize(): number | null {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n const readableController = this._controlledTransformStream._readable._readableStreamController;\n return ReadableStreamDefaultControllerGetDesiredSize(readableController);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the readable side of the controlled transform stream.\n */\n enqueue(chunk: O): void;\n enqueue(chunk: O = undefined!): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n TransformStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors both the readable side and the writable side of the controlled transform stream, making all future\n * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.\n */\n error(reason: any = undefined): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n TransformStreamDefaultControllerError(this, reason);\n }\n\n /**\n * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate(): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n\n TransformStreamDefaultControllerTerminate(this);\n }\n}\n\nObject.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(TransformStreamDefaultController.prototype.error, 'error');\nsetFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n}\n\n// Transform Stream Default Controller Abstract Operations\n\nfunction IsTransformStreamDefaultController(x: any): x is TransformStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n\n return x instanceof TransformStreamDefaultController;\n}\n\nfunction SetUpTransformStreamDefaultController(stream: TransformStream,\n controller: TransformStreamDefaultController,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise) {\n assert(IsTransformStream(stream));\n assert(stream._transformStreamController === undefined);\n\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nfunction SetUpTransformStreamDefaultControllerFromTransformer(stream: TransformStream,\n transformer: ValidatedTransformer) {\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n let transformAlgorithm: (chunk: I) => Promise;\n let flushAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform!(chunk, controller);\n } else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk as unknown as O);\n return promiseResolvedWith(undefined);\n } catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush!(controller);\n } else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n}\n\nfunction TransformStreamDefaultControllerClearAlgorithms(controller: TransformStreamDefaultController) {\n controller._transformAlgorithm = undefined!;\n controller._flushAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\nfunction TransformStreamDefaultControllerEnqueue(controller: TransformStreamDefaultController, chunk: O) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n\n // We throttle transform invocations based on the backpressure of the ReadableStream, but we still\n // accept TransformStreamDefaultControllerEnqueue() calls.\n\n try {\n ReadableStreamDefaultControllerEnqueue(readableController, chunk);\n } catch (e) {\n // This happens when readableStrategy.size() throws.\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n\n throw stream._readable._storedError;\n }\n\n const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);\n if (backpressure !== stream._backpressure) {\n assert(backpressure);\n TransformStreamSetBackpressure(stream, true);\n }\n}\n\nfunction TransformStreamDefaultControllerError(controller: TransformStreamDefaultController, e: any) {\n TransformStreamError(controller._controlledTransformStream, e);\n}\n\nfunction TransformStreamDefaultControllerPerformTransform(controller: TransformStreamDefaultController,\n chunk: I) {\n const transformPromise = controller._transformAlgorithm(chunk);\n return transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n}\n\nfunction TransformStreamDefaultControllerTerminate(controller: TransformStreamDefaultController) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n\n ReadableStreamDefaultControllerClose(readableController);\n\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n}\n\n// TransformStreamDefaultSink Algorithms\n\nfunction TransformStreamDefaultSinkWriteAlgorithm(stream: TransformStream, chunk: I): Promise {\n assert(stream._writable._state === 'writable');\n\n const controller = stream._transformStreamController;\n\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n assert(backpressureChangePromise !== undefined);\n return transformPromiseWith(backpressureChangePromise, () => {\n const writable = stream._writable;\n const state = writable._state;\n if (state === 'erroring') {\n throw writable._storedError;\n }\n assert(state === 'writable');\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n });\n }\n\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n}\n\nfunction TransformStreamDefaultSinkAbortAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally,\n // we don't run the _cancelAlgorithm again.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerError(readable._readableStreamController, reason);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\nfunction TransformStreamDefaultSinkCloseAlgorithm(stream: TransformStream): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// TransformStreamDefaultSource Algorithms\n\nfunction TransformStreamDefaultSourcePullAlgorithm(stream: TransformStream): Promise {\n // Invariant. Enforced by the promises returned by start() and pull().\n assert(stream._backpressure);\n\n assert(stream._backpressureChangePromise !== undefined);\n\n TransformStreamSetBackpressure(stream, false);\n\n // Prevent the next pull() call until there is backpressure.\n return stream._backpressureChangePromise;\n}\n\nfunction TransformStreamDefaultSourceCancelAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._writable cannot change after construction, so caching it across a call to user code is safe.\n const writable = stream._writable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or\n // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the\n // _flushAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (writable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, writable._storedError);\n } else {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// Helper functions for the TransformStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n}\n\nexport function defaultControllerFinishPromiseResolve(controller: TransformStreamDefaultController) {\n if (controller._finishPromise_resolve === undefined) {\n return;\n }\n\n controller._finishPromise_resolve();\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nexport function defaultControllerFinishPromiseReject(controller: TransformStreamDefaultController, reason: any) {\n if (controller._finishPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(controller._finishPromise!);\n controller._finishPromise_reject(reason);\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\n// Helper functions for the TransformStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStream.prototype.${name} can only be used on a TransformStream`);\n}\n","import {\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n ReadableByteStreamController,\n ReadableStream,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultController,\n ReadableStreamDefaultReader,\n TransformStream,\n TransformStreamDefaultController,\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter\n} from './ponyfill';\nimport { globals } from './globals';\n\n// Export\nexport * from './ponyfill';\n\nconst exports = {\n ReadableStream,\n ReadableStreamDefaultController,\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader,\n\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter,\n\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n\n TransformStream,\n TransformStreamDefaultController\n};\n\n// Add classes to global scope\nif (typeof 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\ No newline at end of file diff --git a/node_modules/web-streams-polyfill/dist/polyfill.es6.js b/node_modules/web-streams-polyfill/dist/polyfill.es6.js new file mode 100644 index 00000000..c93a0cb2 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/polyfill.es6.js @@ -0,0 +1,4838 @@ +/** + * @license + * web-streams-polyfill v3.3.3 + * Copyright 2024 Mattias Buelens, Diwank Singh Tomer and other contributors. + * This code is released under the MIT license. + * SPDX-License-Identifier: MIT + */ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : + typeof define === 'function' && define.amd ? define(['exports'], factory) : + (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.WebStreamsPolyfill = {})); +})(this, (function (exports) { 'use strict'; + + function noop() { + return undefined; + } + + function typeIsObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; + } + const rethrowAssertionErrorRejection = noop; + function setFunctionName(fn, name) { + try { + Object.defineProperty(fn, 'name', { + value: name, + configurable: true + }); + } + catch (_a) { + // This property is non-configurable in older browsers, so ignore if this throws. + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility + } + } + + const originalPromise = Promise; + const originalPromiseThen = Promise.prototype.then; + const originalPromiseReject = Promise.reject.bind(originalPromise); + // https://webidl.spec.whatwg.org/#a-new-promise + function newPromise(executor) { + return new originalPromise(executor); + } + // https://webidl.spec.whatwg.org/#a-promise-resolved-with + function promiseResolvedWith(value) { + return newPromise(resolve => resolve(value)); + } + // https://webidl.spec.whatwg.org/#a-promise-rejected-with + function promiseRejectedWith(reason) { + return originalPromiseReject(reason); + } + function PerformPromiseThen(promise, onFulfilled, onRejected) { + // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an + // approximation. + return originalPromiseThen.call(promise, onFulfilled, onRejected); + } + // Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned + // from that handler. To prevent this, return null instead of void from all handlers. + // http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it + function uponPromise(promise, onFulfilled, onRejected) { + PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection); + } + function uponFulfillment(promise, onFulfilled) { + uponPromise(promise, onFulfilled); + } + function uponRejection(promise, onRejected) { + uponPromise(promise, undefined, onRejected); + } + function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) { + return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler); + } + function setPromiseIsHandledToTrue(promise) { + PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection); + } + let _queueMicrotask = callback => { + if (typeof queueMicrotask === 'function') { + _queueMicrotask = queueMicrotask; + } + else { + const resolvedPromise = promiseResolvedWith(undefined); + _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb); + } + return _queueMicrotask(callback); + }; + function reflectCall(F, V, args) { + if (typeof F !== 'function') { + throw new TypeError('Argument is not a function'); + } + return Function.prototype.apply.call(F, V, args); + } + function promiseCall(F, V, args) { + try { + return promiseResolvedWith(reflectCall(F, V, args)); + } + catch (value) { + return promiseRejectedWith(value); + } + } + + // Original from Chromium + // https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js + const QUEUE_MAX_ARRAY_SIZE = 16384; + /** + * Simple queue structure. + * + * Avoids scalability issues with using a packed array directly by using + * multiple arrays in a linked list and keeping the array size bounded. + */ + class SimpleQueue { + constructor() { + this._cursor = 0; + this._size = 0; + // _front and _back are always defined. + this._front = { + _elements: [], + _next: undefined + }; + this._back = this._front; + // The cursor is used to avoid calling Array.shift(). + // It contains the index of the front element of the array inside the + // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE). + this._cursor = 0; + // When there is only one node, size === elements.length - cursor. + this._size = 0; + } + get length() { + return this._size; + } + // For exception safety, this method is structured in order: + // 1. Read state + // 2. Calculate required state mutations + // 3. Perform state mutations + push(element) { + const oldBack = this._back; + let newBack = oldBack; + if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) { + newBack = { + _elements: [], + _next: undefined + }; + } + // push() is the mutation most likely to throw an exception, so it + // goes first. + oldBack._elements.push(element); + if (newBack !== oldBack) { + this._back = newBack; + oldBack._next = newBack; + } + ++this._size; + } + // Like push(), shift() follows the read -> calculate -> mutate pattern for + // exception safety. + shift() { // must not be called on an empty queue + const oldFront = this._front; + let newFront = oldFront; + const oldCursor = this._cursor; + let newCursor = oldCursor + 1; + const elements = oldFront._elements; + const element = elements[oldCursor]; + if (newCursor === QUEUE_MAX_ARRAY_SIZE) { + newFront = oldFront._next; + newCursor = 0; + } + // No mutations before this point. + --this._size; + this._cursor = newCursor; + if (oldFront !== newFront) { + this._front = newFront; + } + // Permit shifted element to be garbage collected. + elements[oldCursor] = undefined; + return element; + } + // The tricky thing about forEach() is that it can be called + // re-entrantly. The queue may be mutated inside the callback. It is easy to + // see that push() within the callback has no negative effects since the end + // of the queue is checked for on every iteration. If shift() is called + // repeatedly within the callback then the next iteration may return an + // element that has been removed. In this case the callback will be called + // with undefined values until we either "catch up" with elements that still + // exist or reach the back of the queue. + forEach(callback) { + let i = this._cursor; + let node = this._front; + let elements = node._elements; + while (i !== elements.length || node._next !== undefined) { + if (i === elements.length) { + node = node._next; + elements = node._elements; + i = 0; + if (elements.length === 0) { + break; + } + } + callback(elements[i]); + ++i; + } + } + // Return the element that would be returned if shift() was called now, + // without modifying the queue. + peek() { // must not be called on an empty queue + const front = this._front; + const cursor = this._cursor; + return front._elements[cursor]; + } + } + + const AbortSteps = Symbol('[[AbortSteps]]'); + const ErrorSteps = Symbol('[[ErrorSteps]]'); + const CancelSteps = Symbol('[[CancelSteps]]'); + const PullSteps = Symbol('[[PullSteps]]'); + const ReleaseSteps = Symbol('[[ReleaseSteps]]'); + + function ReadableStreamReaderGenericInitialize(reader, stream) { + reader._ownerReadableStream = stream; + stream._reader = reader; + if (stream._state === 'readable') { + defaultReaderClosedPromiseInitialize(reader); + } + else if (stream._state === 'closed') { + defaultReaderClosedPromiseInitializeAsResolved(reader); + } + else { + defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError); + } + } + // A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state + // check. + function ReadableStreamReaderGenericCancel(reader, reason) { + const stream = reader._ownerReadableStream; + return ReadableStreamCancel(stream, reason); + } + function ReadableStreamReaderGenericRelease(reader) { + const stream = reader._ownerReadableStream; + if (stream._state === 'readable') { + defaultReaderClosedPromiseReject(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + else { + defaultReaderClosedPromiseResetToRejected(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + stream._readableStreamController[ReleaseSteps](); + stream._reader = undefined; + reader._ownerReadableStream = undefined; + } + // Helper functions for the readers. + function readerLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released reader'); + } + // Helper functions for the ReadableStreamDefaultReader. + function defaultReaderClosedPromiseInitialize(reader) { + reader._closedPromise = newPromise((resolve, reject) => { + reader._closedPromise_resolve = resolve; + reader._closedPromise_reject = reject; + }); + } + function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseReject(reader, reason); + } + function defaultReaderClosedPromiseInitializeAsResolved(reader) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseResolve(reader); + } + function defaultReaderClosedPromiseReject(reader, reason) { + if (reader._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(reader._closedPromise); + reader._closedPromise_reject(reason); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; + } + function defaultReaderClosedPromiseResetToRejected(reader, reason) { + defaultReaderClosedPromiseInitializeAsRejected(reader, reason); + } + function defaultReaderClosedPromiseResolve(reader) { + if (reader._closedPromise_resolve === undefined) { + return; + } + reader._closedPromise_resolve(undefined); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; + } + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill + const NumberIsFinite = Number.isFinite || function (x) { + return typeof x === 'number' && isFinite(x); + }; + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill + const MathTrunc = Math.trunc || function (v) { + return v < 0 ? Math.ceil(v) : Math.floor(v); + }; + + // https://heycam.github.io/webidl/#idl-dictionaries + function isDictionary(x) { + return typeof x === 'object' || typeof x === 'function'; + } + function assertDictionary(obj, context) { + if (obj !== undefined && !isDictionary(obj)) { + throw new TypeError(`${context} is not an object.`); + } + } + // https://heycam.github.io/webidl/#idl-callback-functions + function assertFunction(x, context) { + if (typeof x !== 'function') { + throw new TypeError(`${context} is not a function.`); + } + } + // https://heycam.github.io/webidl/#idl-object + function isObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; + } + function assertObject(x, context) { + if (!isObject(x)) { + throw new TypeError(`${context} is not an object.`); + } + } + function assertRequiredArgument(x, position, context) { + if (x === undefined) { + throw new TypeError(`Parameter ${position} is required in '${context}'.`); + } + } + function assertRequiredField(x, field, context) { + if (x === undefined) { + throw new TypeError(`${field} is required in '${context}'.`); + } + } + // https://heycam.github.io/webidl/#idl-unrestricted-double + function convertUnrestrictedDouble(value) { + return Number(value); + } + function censorNegativeZero(x) { + return x === 0 ? 0 : x; + } + function integerPart(x) { + return censorNegativeZero(MathTrunc(x)); + } + // https://heycam.github.io/webidl/#idl-unsigned-long-long + function convertUnsignedLongLongWithEnforceRange(value, context) { + const lowerBound = 0; + const upperBound = Number.MAX_SAFE_INTEGER; + let x = Number(value); + x = censorNegativeZero(x); + if (!NumberIsFinite(x)) { + throw new TypeError(`${context} is not a finite number`); + } + x = integerPart(x); + if (x < lowerBound || x > upperBound) { + throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`); + } + if (!NumberIsFinite(x) || x === 0) { + return 0; + } + // TODO Use BigInt if supported? + // let xBigInt = BigInt(integerPart(x)); + // xBigInt = BigInt.asUintN(64, xBigInt); + // return Number(xBigInt); + return x; + } + + function assertReadableStream(x, context) { + if (!IsReadableStream(x)) { + throw new TypeError(`${context} is not a ReadableStream.`); + } + } + + // Abstract operations for the ReadableStream. + function AcquireReadableStreamDefaultReader(stream) { + return new ReadableStreamDefaultReader(stream); + } + // ReadableStream API exposed for controllers. + function ReadableStreamAddReadRequest(stream, readRequest) { + stream._reader._readRequests.push(readRequest); + } + function ReadableStreamFulfillReadRequest(stream, chunk, done) { + const reader = stream._reader; + const readRequest = reader._readRequests.shift(); + if (done) { + readRequest._closeSteps(); + } + else { + readRequest._chunkSteps(chunk); + } + } + function ReadableStreamGetNumReadRequests(stream) { + return stream._reader._readRequests.length; + } + function ReadableStreamHasDefaultReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamDefaultReader(reader)) { + return false; + } + return true; + } + /** + * A default reader vended by a {@link ReadableStream}. + * + * @public + */ + class ReadableStreamDefaultReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, + * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + /** + * Returns a promise that allows access to the next chunk from the stream's internal queue, if available. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + read() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('read')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: () => resolvePromise({ value: undefined, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamDefaultReaderRead(this, readRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamDefaultReader(this)) { + throw defaultReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamDefaultReaderRelease(this); + } + } + Object.defineProperties(ReadableStreamDefaultReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } + }); + setFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel'); + setFunctionName(ReadableStreamDefaultReader.prototype.read, 'read'); + setFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultReader', + configurable: true + }); + } + // Abstract operations for the readers. + function IsReadableStreamDefaultReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) { + return false; + } + return x instanceof ReadableStreamDefaultReader; + } + function ReadableStreamDefaultReaderRead(reader, readRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'closed') { + readRequest._closeSteps(); + } + else if (stream._state === 'errored') { + readRequest._errorSteps(stream._storedError); + } + else { + stream._readableStreamController[PullSteps](readRequest); + } + } + function ReadableStreamDefaultReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + function ReadableStreamDefaultReaderErrorReadRequests(reader, e) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._errorSteps(e); + }); + } + // Helper functions for the ReadableStreamDefaultReader. + function defaultReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`); + } + + /****************************************************************************** + Copyright (c) Microsoft Corporation. + + Permission to use, copy, modify, and/or distribute this software for any + purpose with or without fee is hereby granted. + + THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH + REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, + INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR + OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + PERFORMANCE OF THIS SOFTWARE. + ***************************************************************************** */ + /* global Reflect, Promise, SuppressedError, Symbol */ + + + function __values(o) { + var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0; + if (m) return m.call(o); + if (o && typeof o.length === "number") return { + next: function () { + if (o && i >= o.length) o = void 0; + return { value: o && o[i++], done: !o }; + } + }; + throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined."); + } + + function __await(v) { + return this instanceof __await ? (this.v = v, this) : new __await(v); + } + + function __asyncGenerator(thisArg, _arguments, generator) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var g = generator.apply(thisArg, _arguments || []), i, q = []; + return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i; + function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; } + function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } } + function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); } + function fulfill(value) { resume("next", value); } + function reject(value) { resume("throw", value); } + function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); } + } + + function __asyncDelegator(o) { + var i, p; + return i = {}, verb("next"), verb("throw", function (e) { throw e; }), verb("return"), i[Symbol.iterator] = function () { return this; }, i; + function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; } + } + + function __asyncValues(o) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var m = o[Symbol.asyncIterator], i; + return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i); + function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; } + function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); } + } + + typeof SuppressedError === "function" ? SuppressedError : function (error, suppressed, message) { + var e = new Error(message); + return e.name = "SuppressedError", e.error = error, e.suppressed = suppressed, e; + }; + + var _a, _b, _c; + function CreateArrayFromList(elements) { + // We use arrays to represent lists, so this is basically a no-op. + // Do a slice though just in case we happen to depend on the unique-ness. + return elements.slice(); + } + function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) { + new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset); + } + let TransferArrayBuffer = (O) => { + if (typeof O.transfer === 'function') { + TransferArrayBuffer = buffer => buffer.transfer(); + } + else if (typeof structuredClone === 'function') { + TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] }); + } + else { + // Not implemented correctly + TransferArrayBuffer = buffer => buffer; + } + return TransferArrayBuffer(O); + }; + let IsDetachedBuffer = (O) => { + if (typeof O.detached === 'boolean') { + IsDetachedBuffer = buffer => buffer.detached; + } + else { + // Not implemented correctly + IsDetachedBuffer = buffer => buffer.byteLength === 0; + } + return IsDetachedBuffer(O); + }; + function ArrayBufferSlice(buffer, begin, end) { + // ArrayBuffer.prototype.slice is not available on IE10 + // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice + if (buffer.slice) { + return buffer.slice(begin, end); + } + const length = end - begin; + const slice = new ArrayBuffer(length); + CopyDataBlockBytes(slice, 0, buffer, begin, length); + return slice; + } + function GetMethod(receiver, prop) { + const func = receiver[prop]; + if (func === undefined || func === null) { + return undefined; + } + if (typeof func !== 'function') { + throw new TypeError(`${String(prop)} is not a function`); + } + return func; + } + function CreateAsyncFromSyncIterator(syncIteratorRecord) { + // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%, + // we use yield* inside an async generator function to achieve the same result. + // Wrap the sync iterator inside a sync iterable, so we can use it with yield*. + const syncIterable = { + [Symbol.iterator]: () => syncIteratorRecord.iterator + }; + // Create an async generator function and immediately invoke it. + const asyncIterator = (function () { + return __asyncGenerator(this, arguments, function* () { + return yield __await(yield __await(yield* __asyncDelegator(__asyncValues(syncIterable)))); + }); + }()); + // Return as an async iterator record. + const nextMethod = asyncIterator.next; + return { iterator: asyncIterator, nextMethod, done: false }; + } + // Aligns with core-js/modules/es.symbol.async-iterator.js + const SymbolAsyncIterator = (_c = (_a = Symbol.asyncIterator) !== null && _a !== void 0 ? _a : (_b = Symbol.for) === null || _b === void 0 ? void 0 : _b.call(Symbol, 'Symbol.asyncIterator')) !== null && _c !== void 0 ? _c : '@@asyncIterator'; + function GetIterator(obj, hint = 'sync', method) { + if (method === undefined) { + if (hint === 'async') { + method = GetMethod(obj, SymbolAsyncIterator); + if (method === undefined) { + const syncMethod = GetMethod(obj, Symbol.iterator); + const syncIteratorRecord = GetIterator(obj, 'sync', syncMethod); + return CreateAsyncFromSyncIterator(syncIteratorRecord); + } + } + else { + method = GetMethod(obj, Symbol.iterator); + } + } + if (method === undefined) { + throw new TypeError('The object is not iterable'); + } + const iterator = reflectCall(method, obj, []); + if (!typeIsObject(iterator)) { + throw new TypeError('The iterator method must return an object'); + } + const nextMethod = iterator.next; + return { iterator, nextMethod, done: false }; + } + function IteratorNext(iteratorRecord) { + const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []); + if (!typeIsObject(result)) { + throw new TypeError('The iterator.next() method must return an object'); + } + return result; + } + function IteratorComplete(iterResult) { + return Boolean(iterResult.done); + } + function IteratorValue(iterResult) { + return iterResult.value; + } + + /// + // We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it. + const AsyncIteratorPrototype = { + // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( ) + // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator + [SymbolAsyncIterator]() { + return this; + } + }; + Object.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false }); + + /// + class ReadableStreamAsyncIteratorImpl { + constructor(reader, preventCancel) { + this._ongoingPromise = undefined; + this._isFinished = false; + this._reader = reader; + this._preventCancel = preventCancel; + } + next() { + const nextSteps = () => this._nextSteps(); + this._ongoingPromise = this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) : + nextSteps(); + return this._ongoingPromise; + } + return(value) { + const returnSteps = () => this._returnSteps(value); + return this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) : + returnSteps(); + } + _nextSteps() { + if (this._isFinished) { + return Promise.resolve({ value: undefined, done: true }); + } + const reader = this._reader; + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => { + this._ongoingPromise = undefined; + // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test. + // FIXME Is this a bug in the specification, or in the test? + _queueMicrotask(() => resolvePromise({ value: chunk, done: false })); + }, + _closeSteps: () => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + resolvePromise({ value: undefined, done: true }); + }, + _errorSteps: reason => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + rejectPromise(reason); + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promise; + } + _returnSteps(value) { + if (this._isFinished) { + return Promise.resolve({ value, done: true }); + } + this._isFinished = true; + const reader = this._reader; + if (!this._preventCancel) { + const result = ReadableStreamReaderGenericCancel(reader, value); + ReadableStreamReaderGenericRelease(reader); + return transformPromiseWith(result, () => ({ value, done: true })); + } + ReadableStreamReaderGenericRelease(reader); + return promiseResolvedWith({ value, done: true }); + } + } + const ReadableStreamAsyncIteratorPrototype = { + next() { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next')); + } + return this._asyncIteratorImpl.next(); + }, + return(value) { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return')); + } + return this._asyncIteratorImpl.return(value); + } + }; + Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype); + // Abstract operations for the ReadableStream. + function AcquireReadableStreamAsyncIterator(stream, preventCancel) { + const reader = AcquireReadableStreamDefaultReader(stream); + const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel); + const iterator = Object.create(ReadableStreamAsyncIteratorPrototype); + iterator._asyncIteratorImpl = impl; + return iterator; + } + function IsReadableStreamAsyncIterator(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) { + return false; + } + try { + // noinspection SuspiciousTypeOfGuard + return x._asyncIteratorImpl instanceof + ReadableStreamAsyncIteratorImpl; + } + catch (_a) { + return false; + } + } + // Helper functions for the ReadableStream. + function streamAsyncIteratorBrandCheckException(name) { + return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`); + } + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill + const NumberIsNaN = Number.isNaN || function (x) { + // eslint-disable-next-line no-self-compare + return x !== x; + }; + + function IsNonNegativeNumber(v) { + if (typeof v !== 'number') { + return false; + } + if (NumberIsNaN(v)) { + return false; + } + if (v < 0) { + return false; + } + return true; + } + function CloneAsUint8Array(O) { + const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength); + return new Uint8Array(buffer); + } + + function DequeueValue(container) { + const pair = container._queue.shift(); + container._queueTotalSize -= pair.size; + if (container._queueTotalSize < 0) { + container._queueTotalSize = 0; + } + return pair.value; + } + function EnqueueValueWithSize(container, value, size) { + if (!IsNonNegativeNumber(size) || size === Infinity) { + throw new RangeError('Size must be a finite, non-NaN, non-negative number.'); + } + container._queue.push({ value, size }); + container._queueTotalSize += size; + } + function PeekQueueValue(container) { + const pair = container._queue.peek(); + return pair.value; + } + function ResetQueue(container) { + container._queue = new SimpleQueue(); + container._queueTotalSize = 0; + } + + function isDataViewConstructor(ctor) { + return ctor === DataView; + } + function isDataView(view) { + return isDataViewConstructor(view.constructor); + } + function arrayBufferViewElementSize(ctor) { + if (isDataViewConstructor(ctor)) { + return 1; + } + return ctor.BYTES_PER_ELEMENT; + } + + /** + * A pull-into request in a {@link ReadableByteStreamController}. + * + * @public + */ + class ReadableStreamBYOBRequest { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the view for writing in to, or `null` if the BYOB request has already been responded to. + */ + get view() { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('view'); + } + return this._view; + } + respond(bytesWritten) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respond'); + } + assertRequiredArgument(bytesWritten, 1, 'respond'); + bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter'); + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(this._view.buffer)) { + throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`); + } + ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten); + } + respondWithNewView(view) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respondWithNewView'); + } + assertRequiredArgument(view, 1, 'respondWithNewView'); + if (!ArrayBuffer.isView(view)) { + throw new TypeError('You can only respond with array buffer views'); + } + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(view.buffer)) { + throw new TypeError('The given view\'s buffer has been detached and so cannot be used as a response'); + } + ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view); + } + } + Object.defineProperties(ReadableStreamBYOBRequest.prototype, { + respond: { enumerable: true }, + respondWithNewView: { enumerable: true }, + view: { enumerable: true } + }); + setFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond'); + setFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBRequest', + configurable: true + }); + } + /** + * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue. + * + * @public + */ + class ReadableByteStreamController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the current BYOB pull request, or `null` if there isn't one. + */ + get byobRequest() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('byobRequest'); + } + return ReadableByteStreamControllerGetBYOBRequest(this); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('desiredSize'); + } + return ReadableByteStreamControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('close'); + } + if (this._closeRequested) { + throw new TypeError('The stream has already been closed; do not close it again!'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`); + } + ReadableByteStreamControllerClose(this); + } + enqueue(chunk) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('enqueue'); + } + assertRequiredArgument(chunk, 1, 'enqueue'); + if (!ArrayBuffer.isView(chunk)) { + throw new TypeError('chunk must be an array buffer view'); + } + if (chunk.byteLength === 0) { + throw new TypeError('chunk must have non-zero byteLength'); + } + if (chunk.buffer.byteLength === 0) { + throw new TypeError(`chunk's buffer must have non-zero byteLength`); + } + if (this._closeRequested) { + throw new TypeError('stream is closed or draining'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`); + } + ReadableByteStreamControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('error'); + } + ReadableByteStreamControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ReadableByteStreamControllerClearPendingPullIntos(this); + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableByteStreamControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableByteStream; + if (this._queueTotalSize > 0) { + ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest); + return; + } + const autoAllocateChunkSize = this._autoAllocateChunkSize; + if (autoAllocateChunkSize !== undefined) { + let buffer; + try { + buffer = new ArrayBuffer(autoAllocateChunkSize); + } + catch (bufferE) { + readRequest._errorSteps(bufferE); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: autoAllocateChunkSize, + byteOffset: 0, + byteLength: autoAllocateChunkSize, + bytesFilled: 0, + minimumFill: 1, + elementSize: 1, + viewConstructor: Uint8Array, + readerType: 'default' + }; + this._pendingPullIntos.push(pullIntoDescriptor); + } + ReadableStreamAddReadRequest(stream, readRequest); + ReadableByteStreamControllerCallPullIfNeeded(this); + } + /** @internal */ + [ReleaseSteps]() { + if (this._pendingPullIntos.length > 0) { + const firstPullInto = this._pendingPullIntos.peek(); + firstPullInto.readerType = 'none'; + this._pendingPullIntos = new SimpleQueue(); + this._pendingPullIntos.push(firstPullInto); + } + } + } + Object.defineProperties(ReadableByteStreamController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + byobRequest: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(ReadableByteStreamController.prototype.close, 'close'); + setFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue'); + setFunctionName(ReadableByteStreamController.prototype.error, 'error'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, { + value: 'ReadableByteStreamController', + configurable: true + }); + } + // Abstract operations for the ReadableByteStreamController. + function IsReadableByteStreamController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) { + return false; + } + return x instanceof ReadableByteStreamController; + } + function IsReadableStreamBYOBRequest(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) { + return false; + } + return x instanceof ReadableStreamBYOBRequest; + } + function ReadableByteStreamControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableByteStreamControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + // TODO: Test controller argument + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableByteStreamControllerError(controller, e); + return null; + }); + } + function ReadableByteStreamControllerClearPendingPullIntos(controller) { + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + controller._pendingPullIntos = new SimpleQueue(); + } + function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) { + let done = false; + if (stream._state === 'closed') { + done = true; + } + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'default') { + ReadableStreamFulfillReadRequest(stream, filledView, done); + } + else { + ReadableStreamFulfillReadIntoRequest(stream, filledView, done); + } + } + function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) { + const bytesFilled = pullIntoDescriptor.bytesFilled; + const elementSize = pullIntoDescriptor.elementSize; + return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize); + } + function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) { + controller._queue.push({ buffer, byteOffset, byteLength }); + controller._queueTotalSize += byteLength; + } + function ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, buffer, byteOffset, byteLength) { + let clonedChunk; + try { + clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength); + } + catch (cloneE) { + ReadableByteStreamControllerError(controller, cloneE); + throw cloneE; + } + ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength); + } + function ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstDescriptor) { + if (firstDescriptor.bytesFilled > 0) { + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, firstDescriptor.buffer, firstDescriptor.byteOffset, firstDescriptor.bytesFilled); + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) { + const maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled); + const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy; + let totalBytesToCopyRemaining = maxBytesToCopy; + let ready = false; + const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize; + const maxAlignedBytes = maxBytesFilled - remainderBytes; + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) { + totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled; + ready = true; + } + const queue = controller._queue; + while (totalBytesToCopyRemaining > 0) { + const headOfQueue = queue.peek(); + const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength); + const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy); + if (headOfQueue.byteLength === bytesToCopy) { + queue.shift(); + } + else { + headOfQueue.byteOffset += bytesToCopy; + headOfQueue.byteLength -= bytesToCopy; + } + controller._queueTotalSize -= bytesToCopy; + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor); + totalBytesToCopyRemaining -= bytesToCopy; + } + return ready; + } + function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) { + pullIntoDescriptor.bytesFilled += size; + } + function ReadableByteStreamControllerHandleQueueDrain(controller) { + if (controller._queueTotalSize === 0 && controller._closeRequested) { + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(controller._controlledReadableByteStream); + } + else { + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + } + function ReadableByteStreamControllerInvalidateBYOBRequest(controller) { + if (controller._byobRequest === null) { + return; + } + controller._byobRequest._associatedReadableByteStreamController = undefined; + controller._byobRequest._view = null; + controller._byobRequest = null; + } + function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) { + while (controller._pendingPullIntos.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const pullIntoDescriptor = controller._pendingPullIntos.peek(); + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + } + } + } + function ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller) { + const reader = controller._controlledReadableByteStream._reader; + while (reader._readRequests.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const readRequest = reader._readRequests.shift(); + ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest); + } + } + function ReadableByteStreamControllerPullInto(controller, view, min, readIntoRequest) { + const stream = controller._controlledReadableByteStream; + const ctor = view.constructor; + const elementSize = arrayBufferViewElementSize(ctor); + const { byteOffset, byteLength } = view; + const minimumFill = min * elementSize; + let buffer; + try { + buffer = TransferArrayBuffer(view.buffer); + } + catch (e) { + readIntoRequest._errorSteps(e); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: buffer.byteLength, + byteOffset, + byteLength, + bytesFilled: 0, + minimumFill, + elementSize, + viewConstructor: ctor, + readerType: 'byob' + }; + if (controller._pendingPullIntos.length > 0) { + controller._pendingPullIntos.push(pullIntoDescriptor); + // No ReadableByteStreamControllerCallPullIfNeeded() call since: + // - No change happens on desiredSize + // - The source has already been notified of that there's at least 1 pending read(view) + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + return; + } + if (stream._state === 'closed') { + const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0); + readIntoRequest._closeSteps(emptyView); + return; + } + if (controller._queueTotalSize > 0) { + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + ReadableByteStreamControllerHandleQueueDrain(controller); + readIntoRequest._chunkSteps(filledView); + return; + } + if (controller._closeRequested) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + readIntoRequest._errorSteps(e); + return; + } + } + controller._pendingPullIntos.push(pullIntoDescriptor); + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) { + if (firstDescriptor.readerType === 'none') { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const stream = controller._controlledReadableByteStream; + if (ReadableStreamHasBYOBReader(stream)) { + while (ReadableStreamGetNumReadIntoRequests(stream) > 0) { + const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor); + } + } + } + function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) { + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + return; + } + if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) { + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + return; + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize; + if (remainderSize > 0) { + const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, pullIntoDescriptor.buffer, end - remainderSize, remainderSize); + } + pullIntoDescriptor.bytesFilled -= remainderSize; + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor); + } + else { + ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerShiftPendingPullInto(controller) { + const descriptor = controller._pendingPullIntos.shift(); + return descriptor; + } + function ReadableByteStreamControllerShouldCallPull(controller) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return false; + } + if (controller._closeRequested) { + return false; + } + if (!controller._started) { + return false; + } + if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; + } + function ReadableByteStreamControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + } + // A client of ReadableByteStreamController may use these functions directly to bypass state check. + function ReadableByteStreamControllerClose(controller) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + if (controller._queueTotalSize > 0) { + controller._closeRequested = true; + return; + } + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + throw e; + } + } + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } + function ReadableByteStreamControllerEnqueue(controller, chunk) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + const { buffer, byteOffset, byteLength } = chunk; + if (IsDetachedBuffer(buffer)) { + throw new TypeError('chunk\'s buffer is detached and so cannot be enqueued'); + } + const transferredBuffer = TransferArrayBuffer(buffer); + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (IsDetachedBuffer(firstPendingPullInto.buffer)) { + throw new TypeError('The BYOB request\'s buffer has been detached and so cannot be filled with an enqueued chunk'); + } + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer); + if (firstPendingPullInto.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto); + } + } + if (ReadableStreamHasDefaultReader(stream)) { + ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller); + if (ReadableStreamGetNumReadRequests(stream) === 0) { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + else { + if (controller._pendingPullIntos.length > 0) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength); + ReadableStreamFulfillReadRequest(stream, transferredView, false); + } + } + else if (ReadableStreamHasBYOBReader(stream)) { + // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully. + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + else { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerError(controller, e) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return; + } + ReadableByteStreamControllerClearPendingPullIntos(controller); + ResetQueue(controller); + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); + } + function ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest) { + const entry = controller._queue.shift(); + controller._queueTotalSize -= entry.byteLength; + ReadableByteStreamControllerHandleQueueDrain(controller); + const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength); + readRequest._chunkSteps(view); + } + function ReadableByteStreamControllerGetBYOBRequest(controller) { + if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled); + const byobRequest = Object.create(ReadableStreamBYOBRequest.prototype); + SetUpReadableStreamBYOBRequest(byobRequest, controller, view); + controller._byobRequest = byobRequest; + } + return controller._byobRequest; + } + function ReadableByteStreamControllerGetDesiredSize(controller) { + const state = controller._controlledReadableByteStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; + } + function ReadableByteStreamControllerRespond(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (bytesWritten !== 0) { + throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream'); + } + } + else { + if (bytesWritten === 0) { + throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream'); + } + if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) { + throw new RangeError('bytesWritten out of range'); + } + } + firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer); + ReadableByteStreamControllerRespondInternal(controller, bytesWritten); + } + function ReadableByteStreamControllerRespondWithNewView(controller, view) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (view.byteLength !== 0) { + throw new TypeError('The view\'s length must be 0 when calling respondWithNewView() on a closed stream'); + } + } + else { + if (view.byteLength === 0) { + throw new TypeError('The view\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'); + } + } + if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) { + throw new RangeError('The region specified by view does not match byobRequest'); + } + if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) { + throw new RangeError('The buffer of view has different capacity than byobRequest'); + } + if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) { + throw new RangeError('The region specified by view is larger than byobRequest'); + } + const viewByteLength = view.byteLength; + firstDescriptor.buffer = TransferArrayBuffer(view.buffer); + ReadableByteStreamControllerRespondInternal(controller, viewByteLength); + } + function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) { + controller._controlledReadableByteStream = stream; + controller._pullAgain = false; + controller._pulling = false; + controller._byobRequest = null; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._closeRequested = false; + controller._started = false; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._autoAllocateChunkSize = autoAllocateChunkSize; + controller._pendingPullIntos = new SimpleQueue(); + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableByteStreamControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableByteStreamControllerError(controller, r); + return null; + }); + } + function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) { + const controller = Object.create(ReadableByteStreamController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingByteSource.start !== undefined) { + startAlgorithm = () => underlyingByteSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingByteSource.pull !== undefined) { + pullAlgorithm = () => underlyingByteSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingByteSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingByteSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize; + if (autoAllocateChunkSize === 0) { + throw new TypeError('autoAllocateChunkSize must be greater than 0'); + } + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize); + } + function SetUpReadableStreamBYOBRequest(request, controller, view) { + request._associatedReadableByteStreamController = controller; + request._view = view; + } + // Helper functions for the ReadableStreamBYOBRequest. + function byobRequestBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`); + } + // Helper functions for the ReadableByteStreamController. + function byteStreamControllerBrandCheckException(name) { + return new TypeError(`ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`); + } + + function convertReaderOptions(options, context) { + assertDictionary(options, context); + const mode = options === null || options === void 0 ? void 0 : options.mode; + return { + mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`) + }; + } + function convertReadableStreamReaderMode(mode, context) { + mode = `${mode}`; + if (mode !== 'byob') { + throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`); + } + return mode; + } + function convertByobReadOptions(options, context) { + var _a; + assertDictionary(options, context); + const min = (_a = options === null || options === void 0 ? void 0 : options.min) !== null && _a !== void 0 ? _a : 1; + return { + min: convertUnsignedLongLongWithEnforceRange(min, `${context} has member 'min' that`) + }; + } + + // Abstract operations for the ReadableStream. + function AcquireReadableStreamBYOBReader(stream) { + return new ReadableStreamBYOBReader(stream); + } + // ReadableStream API exposed for controllers. + function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) { + stream._reader._readIntoRequests.push(readIntoRequest); + } + function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) { + const reader = stream._reader; + const readIntoRequest = reader._readIntoRequests.shift(); + if (done) { + readIntoRequest._closeSteps(chunk); + } + else { + readIntoRequest._chunkSteps(chunk); + } + } + function ReadableStreamGetNumReadIntoRequests(stream) { + return stream._reader._readIntoRequests.length; + } + function ReadableStreamHasBYOBReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamBYOBReader(reader)) { + return false; + } + return true; + } + /** + * A BYOB reader vended by a {@link ReadableStream}. + * + * @public + */ + class ReadableStreamBYOBReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + if (!IsReadableByteStreamController(stream._readableStreamController)) { + throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' + + 'source'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readIntoRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + read(view, rawOptions = {}) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('read')); + } + if (!ArrayBuffer.isView(view)) { + return promiseRejectedWith(new TypeError('view must be an array buffer view')); + } + if (view.byteLength === 0) { + return promiseRejectedWith(new TypeError('view must have non-zero byteLength')); + } + if (view.buffer.byteLength === 0) { + return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`)); + } + if (IsDetachedBuffer(view.buffer)) { + return promiseRejectedWith(new TypeError('view\'s buffer has been detached')); + } + let options; + try { + options = convertByobReadOptions(rawOptions, 'options'); + } + catch (e) { + return promiseRejectedWith(e); + } + const min = options.min; + if (min === 0) { + return promiseRejectedWith(new TypeError('options.min must be greater than 0')); + } + if (!isDataView(view)) { + if (min > view.length) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s length')); + } + } + else if (min > view.byteLength) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s byteLength')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readIntoRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: chunk => resolvePromise({ value: chunk, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamBYOBReader(this)) { + throw byobReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamBYOBReaderRelease(this); + } + } + Object.defineProperties(ReadableStreamBYOBReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } + }); + setFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel'); + setFunctionName(ReadableStreamBYOBReader.prototype.read, 'read'); + setFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBReader', + configurable: true + }); + } + // Abstract operations for the readers. + function IsReadableStreamBYOBReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) { + return false; + } + return x instanceof ReadableStreamBYOBReader; + } + function ReadableStreamBYOBReaderRead(reader, view, min, readIntoRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'errored') { + readIntoRequest._errorSteps(stream._storedError); + } + else { + ReadableByteStreamControllerPullInto(stream._readableStreamController, view, min, readIntoRequest); + } + } + function ReadableStreamBYOBReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } + function ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._errorSteps(e); + }); + } + // Helper functions for the ReadableStreamBYOBReader. + function byobReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`); + } + + function ExtractHighWaterMark(strategy, defaultHWM) { + const { highWaterMark } = strategy; + if (highWaterMark === undefined) { + return defaultHWM; + } + if (NumberIsNaN(highWaterMark) || highWaterMark < 0) { + throw new RangeError('Invalid highWaterMark'); + } + return highWaterMark; + } + function ExtractSizeAlgorithm(strategy) { + const { size } = strategy; + if (!size) { + return () => 1; + } + return size; + } + + function convertQueuingStrategy(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + const size = init === null || init === void 0 ? void 0 : init.size; + return { + highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark), + size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`) + }; + } + function convertQueuingStrategySize(fn, context) { + assertFunction(fn, context); + return chunk => convertUnrestrictedDouble(fn(chunk)); + } + + function convertUnderlyingSink(original, context) { + assertDictionary(original, context); + const abort = original === null || original === void 0 ? void 0 : original.abort; + const close = original === null || original === void 0 ? void 0 : original.close; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + const write = original === null || original === void 0 ? void 0 : original.write; + return { + abort: abort === undefined ? + undefined : + convertUnderlyingSinkAbortCallback(abort, original, `${context} has member 'abort' that`), + close: close === undefined ? + undefined : + convertUnderlyingSinkCloseCallback(close, original, `${context} has member 'close' that`), + start: start === undefined ? + undefined : + convertUnderlyingSinkStartCallback(start, original, `${context} has member 'start' that`), + write: write === undefined ? + undefined : + convertUnderlyingSinkWriteCallback(write, original, `${context} has member 'write' that`), + type + }; + } + function convertUnderlyingSinkAbortCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); + } + function convertUnderlyingSinkCloseCallback(fn, original, context) { + assertFunction(fn, context); + return () => promiseCall(fn, original, []); + } + function convertUnderlyingSinkStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); + } + function convertUnderlyingSinkWriteCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); + } + + function assertWritableStream(x, context) { + if (!IsWritableStream(x)) { + throw new TypeError(`${context} is not a WritableStream.`); + } + } + + function isAbortSignal(value) { + if (typeof value !== 'object' || value === null) { + return false; + } + try { + return typeof value.aborted === 'boolean'; + } + catch (_a) { + // AbortSignal.prototype.aborted throws if its brand check fails + return false; + } + } + const supportsAbortController = typeof AbortController === 'function'; + /** + * Construct a new AbortController, if supported by the platform. + * + * @internal + */ + function createAbortController() { + if (supportsAbortController) { + return new AbortController(); + } + return undefined; + } + + /** + * A writable stream represents a destination for data, into which you can write. + * + * @public + */ + class WritableStream { + constructor(rawUnderlyingSink = {}, rawStrategy = {}) { + if (rawUnderlyingSink === undefined) { + rawUnderlyingSink = null; + } + else { + assertObject(rawUnderlyingSink, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter'); + InitializeWritableStream(this); + const type = underlyingSink.type; + if (type !== undefined) { + throw new RangeError('Invalid type is specified'); + } + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm); + } + /** + * Returns whether or not the writable stream is locked to a writer. + */ + get locked() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('locked'); + } + return IsWritableStreamLocked(this); + } + /** + * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be + * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort + * mechanism of the underlying sink. + * + * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled + * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel + * the stream) if the stream is currently locked. + */ + abort(reason = undefined) { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('abort')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer')); + } + return WritableStreamAbort(this, reason); + } + /** + * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its + * close behavior. During this time any further attempts to write will fail (without erroring the stream). + * + * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream + * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with + * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked. + */ + close() { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('close')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer')); + } + if (WritableStreamCloseQueuedOrInFlight(this)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamClose(this); + } + /** + * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream + * is locked, no other writer can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to write to a stream + * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at + * the same time, which would cause the resulting written data to be unpredictable and probably useless. + */ + getWriter() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('getWriter'); + } + return AcquireWritableStreamDefaultWriter(this); + } + } + Object.defineProperties(WritableStream.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + getWriter: { enumerable: true }, + locked: { enumerable: true } + }); + setFunctionName(WritableStream.prototype.abort, 'abort'); + setFunctionName(WritableStream.prototype.close, 'close'); + setFunctionName(WritableStream.prototype.getWriter, 'getWriter'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, { + value: 'WritableStream', + configurable: true + }); + } + // Abstract operations for the WritableStream. + function AcquireWritableStreamDefaultWriter(stream) { + return new WritableStreamDefaultWriter(stream); + } + // Throws if and only if startAlgorithm throws. + function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(WritableStream.prototype); + InitializeWritableStream(stream); + const controller = Object.create(WritableStreamDefaultController.prototype); + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + return stream; + } + function InitializeWritableStream(stream) { + stream._state = 'writable'; + // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is + // 'erroring' or 'errored'. May be set to an undefined value. + stream._storedError = undefined; + stream._writer = undefined; + // Initialize to undefined first because the constructor of the controller checks this + // variable to validate the caller. + stream._writableStreamController = undefined; + // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data + // producer without waiting for the queued writes to finish. + stream._writeRequests = new SimpleQueue(); + // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents + // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here. + stream._inFlightWriteRequest = undefined; + // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer + // has been detached. + stream._closeRequest = undefined; + // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it + // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here. + stream._inFlightCloseRequest = undefined; + // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached. + stream._pendingAbortRequest = undefined; + // The backpressure signal set by the controller. + stream._backpressure = false; + } + function IsWritableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) { + return false; + } + return x instanceof WritableStream; + } + function IsWritableStreamLocked(stream) { + if (stream._writer === undefined) { + return false; + } + return true; + } + function WritableStreamAbort(stream, reason) { + var _a; + if (stream._state === 'closed' || stream._state === 'errored') { + return promiseResolvedWith(undefined); + } + stream._writableStreamController._abortReason = reason; + (_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort(reason); + // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring', + // but it doesn't know that signaling abort runs author code that might have changed the state. + // Widen the type again by casting to WritableStreamState. + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseResolvedWith(undefined); + } + if (stream._pendingAbortRequest !== undefined) { + return stream._pendingAbortRequest._promise; + } + let wasAlreadyErroring = false; + if (state === 'erroring') { + wasAlreadyErroring = true; + // reason will not be used, so don't keep a reference to it. + reason = undefined; + } + const promise = newPromise((resolve, reject) => { + stream._pendingAbortRequest = { + _promise: undefined, + _resolve: resolve, + _reject: reject, + _reason: reason, + _wasAlreadyErroring: wasAlreadyErroring + }; + }); + stream._pendingAbortRequest._promise = promise; + if (!wasAlreadyErroring) { + WritableStreamStartErroring(stream, reason); + } + return promise; + } + function WritableStreamClose(stream) { + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseRejectedWith(new TypeError(`The stream (in ${state} state) is not in the writable state and cannot be closed`)); + } + const promise = newPromise((resolve, reject) => { + const closeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._closeRequest = closeRequest; + }); + const writer = stream._writer; + if (writer !== undefined && stream._backpressure && state === 'writable') { + defaultWriterReadyPromiseResolve(writer); + } + WritableStreamDefaultControllerClose(stream._writableStreamController); + return promise; + } + // WritableStream API exposed for controllers. + function WritableStreamAddWriteRequest(stream) { + const promise = newPromise((resolve, reject) => { + const writeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._writeRequests.push(writeRequest); + }); + return promise; + } + function WritableStreamDealWithRejection(stream, error) { + const state = stream._state; + if (state === 'writable') { + WritableStreamStartErroring(stream, error); + return; + } + WritableStreamFinishErroring(stream); + } + function WritableStreamStartErroring(stream, reason) { + const controller = stream._writableStreamController; + stream._state = 'erroring'; + stream._storedError = reason; + const writer = stream._writer; + if (writer !== undefined) { + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason); + } + if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) { + WritableStreamFinishErroring(stream); + } + } + function WritableStreamFinishErroring(stream) { + stream._state = 'errored'; + stream._writableStreamController[ErrorSteps](); + const storedError = stream._storedError; + stream._writeRequests.forEach(writeRequest => { + writeRequest._reject(storedError); + }); + stream._writeRequests = new SimpleQueue(); + if (stream._pendingAbortRequest === undefined) { + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const abortRequest = stream._pendingAbortRequest; + stream._pendingAbortRequest = undefined; + if (abortRequest._wasAlreadyErroring) { + abortRequest._reject(storedError); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const promise = stream._writableStreamController[AbortSteps](abortRequest._reason); + uponPromise(promise, () => { + abortRequest._resolve(); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }, (reason) => { + abortRequest._reject(reason); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }); + } + function WritableStreamFinishInFlightWrite(stream) { + stream._inFlightWriteRequest._resolve(undefined); + stream._inFlightWriteRequest = undefined; + } + function WritableStreamFinishInFlightWriteWithError(stream, error) { + stream._inFlightWriteRequest._reject(error); + stream._inFlightWriteRequest = undefined; + WritableStreamDealWithRejection(stream, error); + } + function WritableStreamFinishInFlightClose(stream) { + stream._inFlightCloseRequest._resolve(undefined); + stream._inFlightCloseRequest = undefined; + const state = stream._state; + if (state === 'erroring') { + // The error was too late to do anything, so it is ignored. + stream._storedError = undefined; + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._resolve(); + stream._pendingAbortRequest = undefined; + } + } + stream._state = 'closed'; + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseResolve(writer); + } + } + function WritableStreamFinishInFlightCloseWithError(stream, error) { + stream._inFlightCloseRequest._reject(error); + stream._inFlightCloseRequest = undefined; + // Never execute sink abort() after sink close(). + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._reject(error); + stream._pendingAbortRequest = undefined; + } + WritableStreamDealWithRejection(stream, error); + } + // TODO(ricea): Fix alphabetical order. + function WritableStreamCloseQueuedOrInFlight(stream) { + if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; + } + function WritableStreamHasOperationMarkedInFlight(stream) { + if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; + } + function WritableStreamMarkCloseRequestInFlight(stream) { + stream._inFlightCloseRequest = stream._closeRequest; + stream._closeRequest = undefined; + } + function WritableStreamMarkFirstWriteRequestInFlight(stream) { + stream._inFlightWriteRequest = stream._writeRequests.shift(); + } + function WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) { + if (stream._closeRequest !== undefined) { + stream._closeRequest._reject(stream._storedError); + stream._closeRequest = undefined; + } + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseReject(writer, stream._storedError); + } + } + function WritableStreamUpdateBackpressure(stream, backpressure) { + const writer = stream._writer; + if (writer !== undefined && backpressure !== stream._backpressure) { + if (backpressure) { + defaultWriterReadyPromiseReset(writer); + } + else { + defaultWriterReadyPromiseResolve(writer); + } + } + stream._backpressure = backpressure; + } + /** + * A default writer vended by a {@link WritableStream}. + * + * @public + */ + class WritableStreamDefaultWriter { + constructor(stream) { + assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter'); + assertWritableStream(stream, 'First parameter'); + if (IsWritableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive writing by another writer'); + } + this._ownerWritableStream = stream; + stream._writer = this; + const state = stream._state; + if (state === 'writable') { + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) { + defaultWriterReadyPromiseInitialize(this); + } + else { + defaultWriterReadyPromiseInitializeAsResolved(this); + } + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'erroring') { + defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError); + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'closed') { + defaultWriterReadyPromiseInitializeAsResolved(this); + defaultWriterClosedPromiseInitializeAsResolved(this); + } + else { + const storedError = stream._storedError; + defaultWriterReadyPromiseInitializeAsRejected(this, storedError); + defaultWriterClosedPromiseInitializeAsRejected(this, storedError); + } + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the writer’s lock is released before the stream finishes closing. + */ + get closed() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full. + * A producer can use this information to determine the right amount of data to write. + * + * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort + * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when + * the writer’s lock is released. + */ + get desiredSize() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('desiredSize'); + } + if (this._ownerWritableStream === undefined) { + throw defaultWriterLockException('desiredSize'); + } + return WritableStreamDefaultWriterGetDesiredSize(this); + } + /** + * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions + * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips + * back to zero or below, the getter will return a new promise that stays pending until the next transition. + * + * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become + * rejected. + */ + get ready() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('ready')); + } + return this._readyPromise; + } + /** + * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}. + */ + abort(reason = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('abort')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('abort')); + } + return WritableStreamDefaultWriterAbort(this, reason); + } + /** + * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}. + */ + close() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('close')); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return promiseRejectedWith(defaultWriterLockException('close')); + } + if (WritableStreamCloseQueuedOrInFlight(stream)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamDefaultWriterClose(this); + } + /** + * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active. + * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from + * now on; otherwise, the writer will appear closed. + * + * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the + * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled). + * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents + * other producers from writing in an interleaved manner. + */ + releaseLock() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('releaseLock'); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return; + } + WritableStreamDefaultWriterRelease(this); + } + write(chunk = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('write')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + return WritableStreamDefaultWriterWrite(this, chunk); + } + } + Object.defineProperties(WritableStreamDefaultWriter.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + releaseLock: { enumerable: true }, + write: { enumerable: true }, + closed: { enumerable: true }, + desiredSize: { enumerable: true }, + ready: { enumerable: true } + }); + setFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort'); + setFunctionName(WritableStreamDefaultWriter.prototype.close, 'close'); + setFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock'); + setFunctionName(WritableStreamDefaultWriter.prototype.write, 'write'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultWriter', + configurable: true + }); + } + // Abstract operations for the WritableStreamDefaultWriter. + function IsWritableStreamDefaultWriter(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultWriter; + } + // A client of WritableStreamDefaultWriter may use these functions directly to bypass state check. + function WritableStreamDefaultWriterAbort(writer, reason) { + const stream = writer._ownerWritableStream; + return WritableStreamAbort(stream, reason); + } + function WritableStreamDefaultWriterClose(writer) { + const stream = writer._ownerWritableStream; + return WritableStreamClose(stream); + } + function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseResolvedWith(undefined); + } + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + return WritableStreamDefaultWriterClose(writer); + } + function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) { + if (writer._closedPromiseState === 'pending') { + defaultWriterClosedPromiseReject(writer, error); + } + else { + defaultWriterClosedPromiseResetToRejected(writer, error); + } + } + function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) { + if (writer._readyPromiseState === 'pending') { + defaultWriterReadyPromiseReject(writer, error); + } + else { + defaultWriterReadyPromiseResetToRejected(writer, error); + } + } + function WritableStreamDefaultWriterGetDesiredSize(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (state === 'errored' || state === 'erroring') { + return null; + } + if (state === 'closed') { + return 0; + } + return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController); + } + function WritableStreamDefaultWriterRelease(writer) { + const stream = writer._ownerWritableStream; + const releasedError = new TypeError(`Writer was released and can no longer be used to monitor the stream's closedness`); + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError); + // The state transitions to "errored" before the sink abort() method runs, but the writer.closed promise is not + // rejected until afterwards. This means that simply testing state will not work. + WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError); + stream._writer = undefined; + writer._ownerWritableStream = undefined; + } + function WritableStreamDefaultWriterWrite(writer, chunk) { + const stream = writer._ownerWritableStream; + const controller = stream._writableStreamController; + const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk); + if (stream !== writer._ownerWritableStream) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + const state = stream._state; + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to')); + } + if (state === 'erroring') { + return promiseRejectedWith(stream._storedError); + } + const promise = WritableStreamAddWriteRequest(stream); + WritableStreamDefaultControllerWrite(controller, chunk, chunkSize); + return promise; + } + const closeSentinel = {}; + /** + * Allows control of a {@link WritableStream | writable stream}'s state and internal queue. + * + * @public + */ + class WritableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted. + * + * @deprecated + * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177. + * Use {@link WritableStreamDefaultController.signal}'s `reason` instead. + */ + get abortReason() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('abortReason'); + } + return this._abortReason; + } + /** + * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted. + */ + get signal() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('signal'); + } + if (this._abortController === undefined) { + // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`. + // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill, + // so instead we only implement support for `signal` if we find a global `AbortController` constructor. + throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported'); + } + return this._abortController.signal; + } + /** + * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`. + * + * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying + * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the + * normal lifecycle of interactions with the underlying sink. + */ + error(e = undefined) { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('error'); + } + const state = this._controlledWritableStream._state; + if (state !== 'writable') { + // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so + // just treat it as a no-op. + return; + } + WritableStreamDefaultControllerError(this, e); + } + /** @internal */ + [AbortSteps](reason) { + const result = this._abortAlgorithm(reason); + WritableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [ErrorSteps]() { + ResetQueue(this); + } + } + Object.defineProperties(WritableStreamDefaultController.prototype, { + abortReason: { enumerable: true }, + signal: { enumerable: true }, + error: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultController', + configurable: true + }); + } + // Abstract operations implementing interface required by the WritableStream. + function IsWritableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultController; + } + function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledWritableStream = stream; + stream._writableStreamController = controller; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._abortReason = undefined; + controller._abortController = createAbortController(); + controller._started = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._writeAlgorithm = writeAlgorithm; + controller._closeAlgorithm = closeAlgorithm; + controller._abortAlgorithm = abortAlgorithm; + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + const startResult = startAlgorithm(); + const startPromise = promiseResolvedWith(startResult); + uponPromise(startPromise, () => { + controller._started = true; + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, r => { + controller._started = true; + WritableStreamDealWithRejection(stream, r); + return null; + }); + } + function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) { + const controller = Object.create(WritableStreamDefaultController.prototype); + let startAlgorithm; + let writeAlgorithm; + let closeAlgorithm; + let abortAlgorithm; + if (underlyingSink.start !== undefined) { + startAlgorithm = () => underlyingSink.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSink.write !== undefined) { + writeAlgorithm = chunk => underlyingSink.write(chunk, controller); + } + else { + writeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.close !== undefined) { + closeAlgorithm = () => underlyingSink.close(); + } + else { + closeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.abort !== undefined) { + abortAlgorithm = reason => underlyingSink.abort(reason); + } + else { + abortAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + } + // ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls. + function WritableStreamDefaultControllerClearAlgorithms(controller) { + controller._writeAlgorithm = undefined; + controller._closeAlgorithm = undefined; + controller._abortAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; + } + function WritableStreamDefaultControllerClose(controller) { + EnqueueValueWithSize(controller, closeSentinel, 0); + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + } + function WritableStreamDefaultControllerGetChunkSize(controller, chunk) { + try { + return controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE); + return 1; + } + } + function WritableStreamDefaultControllerGetDesiredSize(controller) { + return controller._strategyHWM - controller._queueTotalSize; + } + function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) { + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE); + return; + } + const stream = controller._controlledWritableStream; + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + } + // Abstract operations for the WritableStreamDefaultController. + function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) { + const stream = controller._controlledWritableStream; + if (!controller._started) { + return; + } + if (stream._inFlightWriteRequest !== undefined) { + return; + } + const state = stream._state; + if (state === 'erroring') { + WritableStreamFinishErroring(stream); + return; + } + if (controller._queue.length === 0) { + return; + } + const value = PeekQueueValue(controller); + if (value === closeSentinel) { + WritableStreamDefaultControllerProcessClose(controller); + } + else { + WritableStreamDefaultControllerProcessWrite(controller, value); + } + } + function WritableStreamDefaultControllerErrorIfNeeded(controller, error) { + if (controller._controlledWritableStream._state === 'writable') { + WritableStreamDefaultControllerError(controller, error); + } + } + function WritableStreamDefaultControllerProcessClose(controller) { + const stream = controller._controlledWritableStream; + WritableStreamMarkCloseRequestInFlight(stream); + DequeueValue(controller); + const sinkClosePromise = controller._closeAlgorithm(); + WritableStreamDefaultControllerClearAlgorithms(controller); + uponPromise(sinkClosePromise, () => { + WritableStreamFinishInFlightClose(stream); + return null; + }, reason => { + WritableStreamFinishInFlightCloseWithError(stream, reason); + return null; + }); + } + function WritableStreamDefaultControllerProcessWrite(controller, chunk) { + const stream = controller._controlledWritableStream; + WritableStreamMarkFirstWriteRequestInFlight(stream); + const sinkWritePromise = controller._writeAlgorithm(chunk); + uponPromise(sinkWritePromise, () => { + WritableStreamFinishInFlightWrite(stream); + const state = stream._state; + DequeueValue(controller); + if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, reason => { + if (stream._state === 'writable') { + WritableStreamDefaultControllerClearAlgorithms(controller); + } + WritableStreamFinishInFlightWriteWithError(stream, reason); + return null; + }); + } + function WritableStreamDefaultControllerGetBackpressure(controller) { + const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller); + return desiredSize <= 0; + } + // A client of WritableStreamDefaultController may use these functions directly to bypass state check. + function WritableStreamDefaultControllerError(controller, error) { + const stream = controller._controlledWritableStream; + WritableStreamDefaultControllerClearAlgorithms(controller); + WritableStreamStartErroring(stream, error); + } + // Helper functions for the WritableStream. + function streamBrandCheckException$2(name) { + return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`); + } + // Helper functions for the WritableStreamDefaultController. + function defaultControllerBrandCheckException$2(name) { + return new TypeError(`WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`); + } + // Helper functions for the WritableStreamDefaultWriter. + function defaultWriterBrandCheckException(name) { + return new TypeError(`WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`); + } + function defaultWriterLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released writer'); + } + function defaultWriterClosedPromiseInitialize(writer) { + writer._closedPromise = newPromise((resolve, reject) => { + writer._closedPromise_resolve = resolve; + writer._closedPromise_reject = reject; + writer._closedPromiseState = 'pending'; + }); + } + function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseReject(writer, reason); + } + function defaultWriterClosedPromiseInitializeAsResolved(writer) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseResolve(writer); + } + function defaultWriterClosedPromiseReject(writer, reason) { + if (writer._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._closedPromise); + writer._closedPromise_reject(reason); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'rejected'; + } + function defaultWriterClosedPromiseResetToRejected(writer, reason) { + defaultWriterClosedPromiseInitializeAsRejected(writer, reason); + } + function defaultWriterClosedPromiseResolve(writer) { + if (writer._closedPromise_resolve === undefined) { + return; + } + writer._closedPromise_resolve(undefined); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'resolved'; + } + function defaultWriterReadyPromiseInitialize(writer) { + writer._readyPromise = newPromise((resolve, reject) => { + writer._readyPromise_resolve = resolve; + writer._readyPromise_reject = reject; + }); + writer._readyPromiseState = 'pending'; + } + function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseReject(writer, reason); + } + function defaultWriterReadyPromiseInitializeAsResolved(writer) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseResolve(writer); + } + function defaultWriterReadyPromiseReject(writer, reason) { + if (writer._readyPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._readyPromise); + writer._readyPromise_reject(reason); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'rejected'; + } + function defaultWriterReadyPromiseReset(writer) { + defaultWriterReadyPromiseInitialize(writer); + } + function defaultWriterReadyPromiseResetToRejected(writer, reason) { + defaultWriterReadyPromiseInitializeAsRejected(writer, reason); + } + function defaultWriterReadyPromiseResolve(writer) { + if (writer._readyPromise_resolve === undefined) { + return; + } + writer._readyPromise_resolve(undefined); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'fulfilled'; + } + + /// + function getGlobals() { + if (typeof globalThis !== 'undefined') { + return globalThis; + } + else if (typeof self !== 'undefined') { + return self; + } + else if (typeof global !== 'undefined') { + return global; + } + return undefined; + } + const globals = getGlobals(); + + /// + function isDOMExceptionConstructor(ctor) { + if (!(typeof ctor === 'function' || typeof ctor === 'object')) { + return false; + } + if (ctor.name !== 'DOMException') { + return false; + } + try { + new ctor(); + return true; + } + catch (_a) { + return false; + } + } + /** + * Support: + * - Web browsers + * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87) + */ + function getFromGlobal() { + const ctor = globals === null || globals === void 0 ? void 0 : globals.DOMException; + return isDOMExceptionConstructor(ctor) ? ctor : undefined; + } + /** + * Support: + * - All platforms + */ + function createPolyfill() { + // eslint-disable-next-line @typescript-eslint/no-shadow + const ctor = function DOMException(message, name) { + this.message = message || ''; + this.name = name || 'Error'; + if (Error.captureStackTrace) { + Error.captureStackTrace(this, this.constructor); + } + }; + setFunctionName(ctor, 'DOMException'); + ctor.prototype = Object.create(Error.prototype); + Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true }); + return ctor; + } + // eslint-disable-next-line @typescript-eslint/no-redeclare + const DOMException = getFromGlobal() || createPolyfill(); + + function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) { + const reader = AcquireReadableStreamDefaultReader(source); + const writer = AcquireWritableStreamDefaultWriter(dest); + source._disturbed = true; + let shuttingDown = false; + // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown. + let currentWrite = promiseResolvedWith(undefined); + return newPromise((resolve, reject) => { + let abortAlgorithm; + if (signal !== undefined) { + abortAlgorithm = () => { + const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError'); + const actions = []; + if (!preventAbort) { + actions.push(() => { + if (dest._state === 'writable') { + return WritableStreamAbort(dest, error); + } + return promiseResolvedWith(undefined); + }); + } + if (!preventCancel) { + actions.push(() => { + if (source._state === 'readable') { + return ReadableStreamCancel(source, error); + } + return promiseResolvedWith(undefined); + }); + } + shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error); + }; + if (signal.aborted) { + abortAlgorithm(); + return; + } + signal.addEventListener('abort', abortAlgorithm); + } + // Using reader and writer, read all chunks from this and write them to dest + // - Backpressure must be enforced + // - Shutdown must stop all activity + function pipeLoop() { + return newPromise((resolveLoop, rejectLoop) => { + function next(done) { + if (done) { + resolveLoop(); + } + else { + // Use `PerformPromiseThen` instead of `uponPromise` to avoid + // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers + PerformPromiseThen(pipeStep(), next, rejectLoop); + } + } + next(false); + }); + } + function pipeStep() { + if (shuttingDown) { + return promiseResolvedWith(true); + } + return PerformPromiseThen(writer._readyPromise, () => { + return newPromise((resolveRead, rejectRead) => { + ReadableStreamDefaultReaderRead(reader, { + _chunkSteps: chunk => { + currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop); + resolveRead(false); + }, + _closeSteps: () => resolveRead(true), + _errorSteps: rejectRead + }); + }); + }); + } + // Errors must be propagated forward + isOrBecomesErrored(source, reader._closedPromise, storedError => { + if (!preventAbort) { + shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Errors must be propagated backward + isOrBecomesErrored(dest, writer._closedPromise, storedError => { + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Closing must be propagated forward + isOrBecomesClosed(source, reader._closedPromise, () => { + if (!preventClose) { + shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer)); + } + else { + shutdown(); + } + return null; + }); + // Closing must be propagated backward + if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') { + const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it'); + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed); + } + else { + shutdown(true, destClosed); + } + } + setPromiseIsHandledToTrue(pipeLoop()); + function waitForWritesToFinish() { + // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait + // for that too. + const oldCurrentWrite = currentWrite; + return PerformPromiseThen(currentWrite, () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined); + } + function isOrBecomesErrored(stream, promise, action) { + if (stream._state === 'errored') { + action(stream._storedError); + } + else { + uponRejection(promise, action); + } + } + function isOrBecomesClosed(stream, promise, action) { + if (stream._state === 'closed') { + action(); + } + else { + uponFulfillment(promise, action); + } + } + function shutdownWithAction(action, originalIsError, originalError) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), doTheRest); + } + else { + doTheRest(); + } + function doTheRest() { + uponPromise(action(), () => finalize(originalIsError, originalError), newError => finalize(true, newError)); + return null; + } + } + function shutdown(isError, error) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error)); + } + else { + finalize(isError, error); + } + } + function finalize(isError, error) { + WritableStreamDefaultWriterRelease(writer); + ReadableStreamReaderGenericRelease(reader); + if (signal !== undefined) { + signal.removeEventListener('abort', abortAlgorithm); + } + if (isError) { + reject(error); + } + else { + resolve(undefined); + } + return null; + } + }); + } + + /** + * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue. + * + * @public + */ + class ReadableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('desiredSize'); + } + return ReadableStreamDefaultControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('close'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits close'); + } + ReadableStreamDefaultControllerClose(this); + } + enqueue(chunk = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('enqueue'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits enqueue'); + } + return ReadableStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('error'); + } + ReadableStreamDefaultControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableStream; + if (this._queue.length > 0) { + const chunk = DequeueValue(this); + if (this._closeRequested && this._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(this); + ReadableStreamClose(stream); + } + else { + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + readRequest._chunkSteps(chunk); + } + else { + ReadableStreamAddReadRequest(stream, readRequest); + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + } + /** @internal */ + [ReleaseSteps]() { + // Do nothing. + } + } + Object.defineProperties(ReadableStreamDefaultController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(ReadableStreamDefaultController.prototype.close, 'close'); + setFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue'); + setFunctionName(ReadableStreamDefaultController.prototype.error, 'error'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultController', + configurable: true + }); + } + // Abstract operations for the ReadableStreamDefaultController. + function IsReadableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) { + return false; + } + return x instanceof ReadableStreamDefaultController; + } + function ReadableStreamDefaultControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableStreamDefaultControllerError(controller, e); + return null; + }); + } + function ReadableStreamDefaultControllerShouldCallPull(controller) { + const stream = controller._controlledReadableStream; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return false; + } + if (!controller._started) { + return false; + } + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; + } + function ReadableStreamDefaultControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; + } + // A client of ReadableStreamDefaultController may use these functions directly to bypass state check. + function ReadableStreamDefaultControllerClose(controller) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + controller._closeRequested = true; + if (controller._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } + } + function ReadableStreamDefaultControllerEnqueue(controller, chunk) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + ReadableStreamFulfillReadRequest(stream, chunk, false); + } + else { + let chunkSize; + try { + chunkSize = controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + ReadableStreamDefaultControllerError(controller, chunkSizeE); + throw chunkSizeE; + } + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + ReadableStreamDefaultControllerError(controller, enqueueE); + throw enqueueE; + } + } + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + function ReadableStreamDefaultControllerError(controller, e) { + const stream = controller._controlledReadableStream; + if (stream._state !== 'readable') { + return; + } + ResetQueue(controller); + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); + } + function ReadableStreamDefaultControllerGetDesiredSize(controller) { + const state = controller._controlledReadableStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; + } + // This is used in the implementation of TransformStream. + function ReadableStreamDefaultControllerHasBackpressure(controller) { + if (ReadableStreamDefaultControllerShouldCallPull(controller)) { + return false; + } + return true; + } + function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) { + const state = controller._controlledReadableStream._state; + if (!controller._closeRequested && state === 'readable') { + return true; + } + return false; + } + function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledReadableStream = stream; + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._started = false; + controller._closeRequested = false; + controller._pullAgain = false; + controller._pulling = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableStreamDefaultControllerError(controller, r); + return null; + }); + } + function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) { + const controller = Object.create(ReadableStreamDefaultController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingSource.start !== undefined) { + startAlgorithm = () => underlyingSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSource.pull !== undefined) { + pullAlgorithm = () => underlyingSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + } + // Helper functions for the ReadableStreamDefaultController. + function defaultControllerBrandCheckException$1(name) { + return new TypeError(`ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`); + } + + function ReadableStreamTee(stream, cloneForBranch2) { + if (IsReadableByteStreamController(stream._readableStreamController)) { + return ReadableByteStreamTee(stream); + } + return ReadableStreamDefaultTee(stream); + } + function ReadableStreamDefaultTee(stream, cloneForBranch2) { + const reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgain = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function pullAlgorithm() { + if (reading) { + readAgain = true; + return promiseResolvedWith(undefined); + } + reading = true; + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgain = false; + const chunk1 = chunk; + const chunk2 = chunk; + // There is no way to access the cloning code right now in the reference implementation. + // If we add one then we'll need an implementation for serializable objects. + // if (!canceled2 && cloneForBranch2) { + // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2)); + // } + if (!canceled1) { + ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgain) { + pullAlgorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableStreamDefaultControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableStreamDefaultControllerClose(branch2._readableStreamController); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + // do nothing + } + branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm); + branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm); + uponRejection(reader._closedPromise, (r) => { + ReadableStreamDefaultControllerError(branch1._readableStreamController, r); + ReadableStreamDefaultControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + return [branch1, branch2]; + } + function ReadableByteStreamTee(stream) { + let reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgainForBranch1 = false; + let readAgainForBranch2 = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function forwardReaderError(thisReader) { + uponRejection(thisReader._closedPromise, r => { + if (thisReader !== reader) { + return null; + } + ReadableByteStreamControllerError(branch1._readableStreamController, r); + ReadableByteStreamControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + } + function pullWithDefaultReader() { + if (IsReadableStreamBYOBReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamDefaultReader(stream); + forwardReaderError(reader); + } + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const chunk1 = chunk; + let chunk2 = chunk; + if (!canceled1 && !canceled2) { + try { + chunk2 = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(branch1._readableStreamController, cloneE); + ReadableByteStreamControllerError(branch2._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + } + if (!canceled1) { + ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableByteStreamControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableByteStreamControllerClose(branch2._readableStreamController); + } + if (branch1._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch1._readableStreamController, 0); + } + if (branch2._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch2._readableStreamController, 0); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + } + function pullWithBYOBReader(view, forBranch2) { + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamBYOBReader(stream); + forwardReaderError(reader); + } + const byobBranch = forBranch2 ? branch2 : branch1; + const otherBranch = forBranch2 ? branch1 : branch2; + const readIntoRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!otherCanceled) { + let clonedChunk; + try { + clonedChunk = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE); + ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk); + } + else if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: chunk => { + reading = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!byobCanceled) { + ReadableByteStreamControllerClose(byobBranch._readableStreamController); + } + if (!otherCanceled) { + ReadableByteStreamControllerClose(otherBranch._readableStreamController); + } + if (chunk !== undefined) { + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0); + } + } + if (!byobCanceled || !otherCanceled) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest); + } + function pull1Algorithm() { + if (reading) { + readAgainForBranch1 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, false); + } + return promiseResolvedWith(undefined); + } + function pull2Algorithm() { + if (reading) { + readAgainForBranch2 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, true); + } + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + return; + } + branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm); + branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm); + forwardReaderError(reader); + return [branch1, branch2]; + } + + function isReadableStreamLike(stream) { + return typeIsObject(stream) && typeof stream.getReader !== 'undefined'; + } + + function ReadableStreamFrom(source) { + if (isReadableStreamLike(source)) { + return ReadableStreamFromDefaultReader(source.getReader()); + } + return ReadableStreamFromIterable(source); + } + function ReadableStreamFromIterable(asyncIterable) { + let stream; + const iteratorRecord = GetIterator(asyncIterable, 'async'); + const startAlgorithm = noop; + function pullAlgorithm() { + let nextResult; + try { + nextResult = IteratorNext(iteratorRecord); + } + catch (e) { + return promiseRejectedWith(e); + } + const nextPromise = promiseResolvedWith(nextResult); + return transformPromiseWith(nextPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object'); + } + const done = IteratorComplete(iterResult); + if (done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = IteratorValue(iterResult); + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + const iterator = iteratorRecord.iterator; + let returnMethod; + try { + returnMethod = GetMethod(iterator, 'return'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (returnMethod === undefined) { + return promiseResolvedWith(undefined); + } + let returnResult; + try { + returnResult = reflectCall(returnMethod, iterator, [reason]); + } + catch (e) { + return promiseRejectedWith(e); + } + const returnPromise = promiseResolvedWith(returnResult); + return transformPromiseWith(returnPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object'); + } + return undefined; + }); + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; + } + function ReadableStreamFromDefaultReader(reader) { + let stream; + const startAlgorithm = noop; + function pullAlgorithm() { + let readPromise; + try { + readPromise = reader.read(); + } + catch (e) { + return promiseRejectedWith(e); + } + return transformPromiseWith(readPromise, readResult => { + if (!typeIsObject(readResult)) { + throw new TypeError('The promise returned by the reader.read() method must fulfill with an object'); + } + if (readResult.done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = readResult.value; + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + try { + return promiseResolvedWith(reader.cancel(reason)); + } + catch (e) { + return promiseRejectedWith(e); + } + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; + } + + function convertUnderlyingDefaultOrByteSource(source, context) { + assertDictionary(source, context); + const original = source; + const autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize; + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const pull = original === null || original === void 0 ? void 0 : original.pull; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + return { + autoAllocateChunkSize: autoAllocateChunkSize === undefined ? + undefined : + convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, `${context} has member 'autoAllocateChunkSize' that`), + cancel: cancel === undefined ? + undefined : + convertUnderlyingSourceCancelCallback(cancel, original, `${context} has member 'cancel' that`), + pull: pull === undefined ? + undefined : + convertUnderlyingSourcePullCallback(pull, original, `${context} has member 'pull' that`), + start: start === undefined ? + undefined : + convertUnderlyingSourceStartCallback(start, original, `${context} has member 'start' that`), + type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`) + }; + } + function convertUnderlyingSourceCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); + } + function convertUnderlyingSourcePullCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); + } + function convertUnderlyingSourceStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); + } + function convertReadableStreamType(type, context) { + type = `${type}`; + if (type !== 'bytes') { + throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`); + } + return type; + } + + function convertIteratorOptions(options, context) { + assertDictionary(options, context); + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + return { preventCancel: Boolean(preventCancel) }; + } + + function convertPipeOptions(options, context) { + assertDictionary(options, context); + const preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort; + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + const preventClose = options === null || options === void 0 ? void 0 : options.preventClose; + const signal = options === null || options === void 0 ? void 0 : options.signal; + if (signal !== undefined) { + assertAbortSignal(signal, `${context} has member 'signal' that`); + } + return { + preventAbort: Boolean(preventAbort), + preventCancel: Boolean(preventCancel), + preventClose: Boolean(preventClose), + signal + }; + } + function assertAbortSignal(signal, context) { + if (!isAbortSignal(signal)) { + throw new TypeError(`${context} is not an AbortSignal.`); + } + } + + function convertReadableWritablePair(pair, context) { + assertDictionary(pair, context); + const readable = pair === null || pair === void 0 ? void 0 : pair.readable; + assertRequiredField(readable, 'readable', 'ReadableWritablePair'); + assertReadableStream(readable, `${context} has member 'readable' that`); + const writable = pair === null || pair === void 0 ? void 0 : pair.writable; + assertRequiredField(writable, 'writable', 'ReadableWritablePair'); + assertWritableStream(writable, `${context} has member 'writable' that`); + return { readable, writable }; + } + + /** + * A readable stream represents a source of data, from which you can read. + * + * @public + */ + class ReadableStream { + constructor(rawUnderlyingSource = {}, rawStrategy = {}) { + if (rawUnderlyingSource === undefined) { + rawUnderlyingSource = null; + } + else { + assertObject(rawUnderlyingSource, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter'); + InitializeReadableStream(this); + if (underlyingSource.type === 'bytes') { + if (strategy.size !== undefined) { + throw new RangeError('The strategy for a byte stream cannot have a size function'); + } + const highWaterMark = ExtractHighWaterMark(strategy, 0); + SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark); + } + else { + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm); + } + } + /** + * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}. + */ + get locked() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('locked'); + } + return IsReadableStreamLocked(this); + } + /** + * Cancels the stream, signaling a loss of interest in the stream by a consumer. + * + * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()} + * method, which might or might not use it. + */ + cancel(reason = undefined) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('cancel')); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader')); + } + return ReadableStreamCancel(this, reason); + } + getReader(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('getReader'); + } + const options = convertReaderOptions(rawOptions, 'First parameter'); + if (options.mode === undefined) { + return AcquireReadableStreamDefaultReader(this); + } + return AcquireReadableStreamBYOBReader(this); + } + pipeThrough(rawTransform, rawOptions = {}) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('pipeThrough'); + } + assertRequiredArgument(rawTransform, 1, 'pipeThrough'); + const transform = convertReadableWritablePair(rawTransform, 'First parameter'); + const options = convertPipeOptions(rawOptions, 'Second parameter'); + if (IsReadableStreamLocked(this)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream'); + } + if (IsWritableStreamLocked(transform.writable)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream'); + } + const promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + setPromiseIsHandledToTrue(promise); + return transform.readable; + } + pipeTo(destination, rawOptions = {}) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('pipeTo')); + } + if (destination === undefined) { + return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`); + } + if (!IsWritableStream(destination)) { + return promiseRejectedWith(new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)); + } + let options; + try { + options = convertPipeOptions(rawOptions, 'Second parameter'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')); + } + if (IsWritableStreamLocked(destination)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')); + } + return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + } + /** + * Tees this readable stream, returning a two-element array containing the two resulting branches as + * new {@link ReadableStream} instances. + * + * Teeing a stream will lock it, preventing any other consumer from acquiring a reader. + * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be + * propagated to the stream's underlying source. + * + * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable, + * this could allow interference between the two branches. + */ + tee() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('tee'); + } + const branches = ReadableStreamTee(this); + return CreateArrayFromList(branches); + } + values(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('values'); + } + const options = convertIteratorOptions(rawOptions, 'First parameter'); + return AcquireReadableStreamAsyncIterator(this, options.preventCancel); + } + [SymbolAsyncIterator](options) { + // Stub implementation, overridden below + return this.values(options); + } + /** + * Creates a new ReadableStream wrapping the provided iterable or async iterable. + * + * This can be used to adapt various kinds of objects into a readable stream, + * such as an array, an async generator, or a Node.js readable stream. + */ + static from(asyncIterable) { + return ReadableStreamFrom(asyncIterable); + } + } + Object.defineProperties(ReadableStream, { + from: { enumerable: true } + }); + Object.defineProperties(ReadableStream.prototype, { + cancel: { enumerable: true }, + getReader: { enumerable: true }, + pipeThrough: { enumerable: true }, + pipeTo: { enumerable: true }, + tee: { enumerable: true }, + values: { enumerable: true }, + locked: { enumerable: true } + }); + setFunctionName(ReadableStream.from, 'from'); + setFunctionName(ReadableStream.prototype.cancel, 'cancel'); + setFunctionName(ReadableStream.prototype.getReader, 'getReader'); + setFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough'); + setFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo'); + setFunctionName(ReadableStream.prototype.tee, 'tee'); + setFunctionName(ReadableStream.prototype.values, 'values'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, { + value: 'ReadableStream', + configurable: true + }); + } + Object.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, { + value: ReadableStream.prototype.values, + writable: true, + configurable: true + }); + // Abstract operations for the ReadableStream. + // Throws if and only if startAlgorithm throws. + function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableStreamDefaultController.prototype); + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + return stream; + } + // Throws if and only if startAlgorithm throws. + function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableByteStreamController.prototype); + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined); + return stream; + } + function InitializeReadableStream(stream) { + stream._state = 'readable'; + stream._reader = undefined; + stream._storedError = undefined; + stream._disturbed = false; + } + function IsReadableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) { + return false; + } + return x instanceof ReadableStream; + } + function IsReadableStreamLocked(stream) { + if (stream._reader === undefined) { + return false; + } + return true; + } + // ReadableStream API exposed for controllers. + function ReadableStreamCancel(stream, reason) { + stream._disturbed = true; + if (stream._state === 'closed') { + return promiseResolvedWith(undefined); + } + if (stream._state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + ReadableStreamClose(stream); + const reader = stream._reader; + if (reader !== undefined && IsReadableStreamBYOBReader(reader)) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._closeSteps(undefined); + }); + } + const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason); + return transformPromiseWith(sourceCancelPromise, noop); + } + function ReadableStreamClose(stream) { + stream._state = 'closed'; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseResolve(reader); + if (IsReadableStreamDefaultReader(reader)) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._closeSteps(); + }); + } + } + function ReadableStreamError(stream, e) { + stream._state = 'errored'; + stream._storedError = e; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseReject(reader, e); + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + else { + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } + } + // Helper functions for the ReadableStream. + function streamBrandCheckException$1(name) { + return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`); + } + + function convertQueuingStrategyInit(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit'); + return { + highWaterMark: convertUnrestrictedDouble(highWaterMark) + }; + } + + // The size function must not have a prototype property nor be a constructor + const byteLengthSizeFunction = (chunk) => { + return chunk.byteLength; + }; + setFunctionName(byteLengthSizeFunction, 'size'); + /** + * A queuing strategy that counts the number of bytes in each chunk. + * + * @public + */ + class ByteLengthQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('highWaterMark'); + } + return this._byteLengthQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by returning the value of its `byteLength` property. + */ + get size() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('size'); + } + return byteLengthSizeFunction; + } + } + Object.defineProperties(ByteLengthQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'ByteLengthQueuingStrategy', + configurable: true + }); + } + // Helper functions for the ByteLengthQueuingStrategy. + function byteLengthBrandCheckException(name) { + return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`); + } + function IsByteLengthQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof ByteLengthQueuingStrategy; + } + + // The size function must not have a prototype property nor be a constructor + const countSizeFunction = () => { + return 1; + }; + setFunctionName(countSizeFunction, 'size'); + /** + * A queuing strategy that counts the number of chunks. + * + * @public + */ + class CountQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'CountQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._countQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('highWaterMark'); + } + return this._countQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by always returning 1. + * This ensures that the total queue size is a count of the number of chunks in the queue. + */ + get size() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('size'); + } + return countSizeFunction; + } + } + Object.defineProperties(CountQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'CountQueuingStrategy', + configurable: true + }); + } + // Helper functions for the CountQueuingStrategy. + function countBrandCheckException(name) { + return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`); + } + function IsCountQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof CountQueuingStrategy; + } + + function convertTransformer(original, context) { + assertDictionary(original, context); + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const flush = original === null || original === void 0 ? void 0 : original.flush; + const readableType = original === null || original === void 0 ? void 0 : original.readableType; + const start = original === null || original === void 0 ? void 0 : original.start; + const transform = original === null || original === void 0 ? void 0 : original.transform; + const writableType = original === null || original === void 0 ? void 0 : original.writableType; + return { + cancel: cancel === undefined ? + undefined : + convertTransformerCancelCallback(cancel, original, `${context} has member 'cancel' that`), + flush: flush === undefined ? + undefined : + convertTransformerFlushCallback(flush, original, `${context} has member 'flush' that`), + readableType, + start: start === undefined ? + undefined : + convertTransformerStartCallback(start, original, `${context} has member 'start' that`), + transform: transform === undefined ? + undefined : + convertTransformerTransformCallback(transform, original, `${context} has member 'transform' that`), + writableType + }; + } + function convertTransformerFlushCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); + } + function convertTransformerStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); + } + function convertTransformerTransformCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); + } + function convertTransformerCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); + } + + // Class TransformStream + /** + * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream}, + * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side. + * In a manner specific to the transform stream in question, writes to the writable side result in new data being + * made available for reading from the readable side. + * + * @public + */ + class TransformStream { + constructor(rawTransformer = {}, rawWritableStrategy = {}, rawReadableStrategy = {}) { + if (rawTransformer === undefined) { + rawTransformer = null; + } + const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter'); + const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter'); + const transformer = convertTransformer(rawTransformer, 'First parameter'); + if (transformer.readableType !== undefined) { + throw new RangeError('Invalid readableType specified'); + } + if (transformer.writableType !== undefined) { + throw new RangeError('Invalid writableType specified'); + } + const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0); + const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy); + const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1); + const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy); + let startPromise_resolve; + const startPromise = newPromise(resolve => { + startPromise_resolve = resolve; + }); + InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + SetUpTransformStreamDefaultControllerFromTransformer(this, transformer); + if (transformer.start !== undefined) { + startPromise_resolve(transformer.start(this._transformStreamController)); + } + else { + startPromise_resolve(undefined); + } + } + /** + * The readable side of the transform stream. + */ + get readable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('readable'); + } + return this._readable; + } + /** + * The writable side of the transform stream. + */ + get writable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('writable'); + } + return this._writable; + } + } + Object.defineProperties(TransformStream.prototype, { + readable: { enumerable: true }, + writable: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, { + value: 'TransformStream', + configurable: true + }); + } + function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) { + function startAlgorithm() { + return startPromise; + } + function writeAlgorithm(chunk) { + return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk); + } + function abortAlgorithm(reason) { + return TransformStreamDefaultSinkAbortAlgorithm(stream, reason); + } + function closeAlgorithm() { + return TransformStreamDefaultSinkCloseAlgorithm(stream); + } + stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm); + function pullAlgorithm() { + return TransformStreamDefaultSourcePullAlgorithm(stream); + } + function cancelAlgorithm(reason) { + return TransformStreamDefaultSourceCancelAlgorithm(stream, reason); + } + stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure. + stream._backpressure = undefined; + stream._backpressureChangePromise = undefined; + stream._backpressureChangePromise_resolve = undefined; + TransformStreamSetBackpressure(stream, true); + stream._transformStreamController = undefined; + } + function IsTransformStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) { + return false; + } + return x instanceof TransformStream; + } + // This is a no-op if both sides are already errored. + function TransformStreamError(stream, e) { + ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e); + TransformStreamErrorWritableAndUnblockWrite(stream, e); + } + function TransformStreamErrorWritableAndUnblockWrite(stream, e) { + TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController); + WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e); + TransformStreamUnblockWrite(stream); + } + function TransformStreamUnblockWrite(stream) { + if (stream._backpressure) { + // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure() + // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time + // _backpressure is set. + TransformStreamSetBackpressure(stream, false); + } + } + function TransformStreamSetBackpressure(stream, backpressure) { + // Passes also when called during construction. + if (stream._backpressureChangePromise !== undefined) { + stream._backpressureChangePromise_resolve(); + } + stream._backpressureChangePromise = newPromise(resolve => { + stream._backpressureChangePromise_resolve = resolve; + }); + stream._backpressure = backpressure; + } + // Class TransformStreamDefaultController + /** + * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}. + * + * @public + */ + class TransformStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full. + */ + get desiredSize() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('desiredSize'); + } + const readableController = this._controlledTransformStream._readable._readableStreamController; + return ReadableStreamDefaultControllerGetDesiredSize(readableController); + } + enqueue(chunk = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('enqueue'); + } + TransformStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors both the readable side and the writable side of the controlled transform stream, making all future + * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded. + */ + error(reason = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('error'); + } + TransformStreamDefaultControllerError(this, reason); + } + /** + * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the + * transformer only needs to consume a portion of the chunks written to the writable side. + */ + terminate() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('terminate'); + } + TransformStreamDefaultControllerTerminate(this); + } + } + Object.defineProperties(TransformStreamDefaultController.prototype, { + enqueue: { enumerable: true }, + error: { enumerable: true }, + terminate: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue'); + setFunctionName(TransformStreamDefaultController.prototype.error, 'error'); + setFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'TransformStreamDefaultController', + configurable: true + }); + } + // Transform Stream Default Controller Abstract Operations + function IsTransformStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) { + return false; + } + return x instanceof TransformStreamDefaultController; + } + function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm) { + controller._controlledTransformStream = stream; + stream._transformStreamController = controller; + controller._transformAlgorithm = transformAlgorithm; + controller._flushAlgorithm = flushAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._finishPromise = undefined; + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) { + const controller = Object.create(TransformStreamDefaultController.prototype); + let transformAlgorithm; + let flushAlgorithm; + let cancelAlgorithm; + if (transformer.transform !== undefined) { + transformAlgorithm = chunk => transformer.transform(chunk, controller); + } + else { + transformAlgorithm = chunk => { + try { + TransformStreamDefaultControllerEnqueue(controller, chunk); + return promiseResolvedWith(undefined); + } + catch (transformResultE) { + return promiseRejectedWith(transformResultE); + } + }; + } + if (transformer.flush !== undefined) { + flushAlgorithm = () => transformer.flush(controller); + } + else { + flushAlgorithm = () => promiseResolvedWith(undefined); + } + if (transformer.cancel !== undefined) { + cancelAlgorithm = reason => transformer.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm); + } + function TransformStreamDefaultControllerClearAlgorithms(controller) { + controller._transformAlgorithm = undefined; + controller._flushAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + } + function TransformStreamDefaultControllerEnqueue(controller, chunk) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) { + throw new TypeError('Readable side is not in a state that permits enqueue'); + } + // We throttle transform invocations based on the backpressure of the ReadableStream, but we still + // accept TransformStreamDefaultControllerEnqueue() calls. + try { + ReadableStreamDefaultControllerEnqueue(readableController, chunk); + } + catch (e) { + // This happens when readableStrategy.size() throws. + TransformStreamErrorWritableAndUnblockWrite(stream, e); + throw stream._readable._storedError; + } + const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController); + if (backpressure !== stream._backpressure) { + TransformStreamSetBackpressure(stream, true); + } + } + function TransformStreamDefaultControllerError(controller, e) { + TransformStreamError(controller._controlledTransformStream, e); + } + function TransformStreamDefaultControllerPerformTransform(controller, chunk) { + const transformPromise = controller._transformAlgorithm(chunk); + return transformPromiseWith(transformPromise, undefined, r => { + TransformStreamError(controller._controlledTransformStream, r); + throw r; + }); + } + function TransformStreamDefaultControllerTerminate(controller) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + ReadableStreamDefaultControllerClose(readableController); + const error = new TypeError('TransformStream terminated'); + TransformStreamErrorWritableAndUnblockWrite(stream, error); + } + // TransformStreamDefaultSink Algorithms + function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) { + const controller = stream._transformStreamController; + if (stream._backpressure) { + const backpressureChangePromise = stream._backpressureChangePromise; + return transformPromiseWith(backpressureChangePromise, () => { + const writable = stream._writable; + const state = writable._state; + if (state === 'erroring') { + throw writable._storedError; + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + }); + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + } + function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally, + // we don't run the _cancelAlgorithm again. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerError(readable._readableStreamController, reason); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + function TransformStreamDefaultSinkCloseAlgorithm(stream) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally, + // we don't also run the _cancelAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const flushPromise = controller._flushAlgorithm(); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(flushPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerClose(readable._readableStreamController); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + // TransformStreamDefaultSource Algorithms + function TransformStreamDefaultSourcePullAlgorithm(stream) { + // Invariant. Enforced by the promises returned by start() and pull(). + TransformStreamSetBackpressure(stream, false); + // Prevent the next pull() call until there is backpressure. + return stream._backpressureChangePromise; + } + function TransformStreamDefaultSourceCancelAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._writable cannot change after construction, so caching it across a call to user code is safe. + const writable = stream._writable; + // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or + // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the + // _flushAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (writable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, writable._storedError); + } + else { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + // Helper functions for the TransformStreamDefaultController. + function defaultControllerBrandCheckException(name) { + return new TypeError(`TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`); + } + function defaultControllerFinishPromiseResolve(controller) { + if (controller._finishPromise_resolve === undefined) { + return; + } + controller._finishPromise_resolve(); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + function defaultControllerFinishPromiseReject(controller, reason) { + if (controller._finishPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(controller._finishPromise); + controller._finishPromise_reject(reason); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + // Helper functions for the TransformStream. + function streamBrandCheckException(name) { + return new TypeError(`TransformStream.prototype.${name} can only be used on a TransformStream`); + } + + const exports$1 = { + ReadableStream, + ReadableStreamDefaultController, + ReadableByteStreamController, + ReadableStreamBYOBRequest, + ReadableStreamDefaultReader, + ReadableStreamBYOBReader, + WritableStream, + WritableStreamDefaultController, + WritableStreamDefaultWriter, + ByteLengthQueuingStrategy, + CountQueuingStrategy, + TransformStream, + TransformStreamDefaultController + }; + // Add classes to global scope + if (typeof globals !== 'undefined') { + for (const prop in exports$1) { + if (Object.prototype.hasOwnProperty.call(exports$1, prop)) { + Object.defineProperty(globals, prop, { + value: exports$1[prop], + writable: true, + configurable: true + }); + } + } + } + + exports.ByteLengthQueuingStrategy = ByteLengthQueuingStrategy; + exports.CountQueuingStrategy = CountQueuingStrategy; + exports.ReadableByteStreamController = ReadableByteStreamController; + exports.ReadableStream = ReadableStream; + exports.ReadableStreamBYOBReader = ReadableStreamBYOBReader; + exports.ReadableStreamBYOBRequest = ReadableStreamBYOBRequest; + exports.ReadableStreamDefaultController = ReadableStreamDefaultController; + exports.ReadableStreamDefaultReader = ReadableStreamDefaultReader; + exports.TransformStream = TransformStream; + exports.TransformStreamDefaultController = TransformStreamDefaultController; + exports.WritableStream = WritableStream; + exports.WritableStreamDefaultController = WritableStreamDefaultController; + exports.WritableStreamDefaultWriter = WritableStreamDefaultWriter; + +})); +//# sourceMappingURL=polyfill.es6.js.map diff --git a/node_modules/web-streams-polyfill/dist/polyfill.es6.js.map b/node_modules/web-streams-polyfill/dist/polyfill.es6.js.map new file mode 100644 index 00000000..1f20a0a2 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/polyfill.es6.js.map @@ -0,0 +1 @@ +{"version":3,"file":"polyfill.es6.js","sources":["../src/utils.ts","../src/lib/helpers/miscellaneous.ts","../src/lib/helpers/webidl.ts","../src/lib/simple-queue.ts","../src/lib/abstract-ops/internal-methods.ts","../src/lib/readable-stream/generic-reader.ts","../src/stub/number-isfinite.ts","../src/stub/math-trunc.ts","../src/lib/validators/basic.ts","../src/lib/validators/readable-stream.ts","../src/lib/readable-stream/default-reader.ts","../node_modules/tslib/tslib.es6.js","../src/lib/abstract-ops/ecmascript.ts","../src/target/es5/stub/async-iterator-prototype.ts","../src/lib/readable-stream/async-iterator.ts","../src/stub/number-isnan.ts","../src/lib/abstract-ops/miscellaneous.ts","../src/lib/abstract-ops/queue-with-sizes.ts","../src/lib/helpers/array-buffer-view.ts","../src/lib/readable-stream/byte-stream-controller.ts","../src/lib/validators/reader-options.ts","../src/lib/readable-stream/byob-reader.ts","../src/lib/abstract-ops/queuing-strategy.ts","../src/lib/validators/queuing-strategy.ts","../src/lib/validators/underlying-sink.ts","../src/lib/validators/writable-stream.ts","../src/lib/abort-signal.ts","../src/lib/writable-stream.ts","../src/globals.ts","../src/stub/dom-exception.ts","../src/lib/readable-stream/pipe.ts","../src/lib/readable-stream/default-controller.ts","../src/lib/readable-stream/tee.ts","../src/lib/readable-stream/readable-stream-like.ts","../src/lib/readable-stream/from.ts","../src/lib/validators/underlying-source.ts","../src/lib/validators/iterator-options.ts","../src/lib/validators/pipe-options.ts","../src/lib/validators/readable-writable-pair.ts","../src/lib/readable-stream.ts","../src/lib/validators/queuing-strategy-init.ts","../src/lib/byte-length-queuing-strategy.ts","../src/lib/count-queuing-strategy.ts","../src/lib/validators/transformer.ts","../src/lib/transform-stream.ts","../src/polyfill.ts"],"sourcesContent":["export function noop(): undefined {\n return undefined;\n}\n","import { noop } from '../../utils';\nimport { AssertionError } from '../../stub/assert';\n\nexport function typeIsObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport const rethrowAssertionErrorRejection: (e: any) => void =\n DEBUG ? e => {\n // Used throughout the reference implementation, as `.catch(rethrowAssertionErrorRejection)`, to ensure any errors\n // get shown. There are places in the spec where we do promise transformations and purposefully ignore or don't\n // expect any errors, but assertion errors are always problematic.\n if (e && e instanceof AssertionError) {\n setTimeout(() => {\n throw e;\n }, 0);\n }\n } : noop;\n\nexport function setFunctionName(fn: Function, name: string): void {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n } catch {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n}\n","import { rethrowAssertionErrorRejection } from './miscellaneous';\nimport assert from '../../stub/assert';\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\n\n// https://webidl.spec.whatwg.org/#a-new-promise\nexport function newPromise(executor: (\n resolve: (value: T | PromiseLike) => void,\n reject: (reason?: any) => void\n) => void): Promise {\n return new originalPromise(executor);\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-resolved-with\nexport function promiseResolvedWith(value: T | PromiseLike): Promise {\n return newPromise(resolve => resolve(value));\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-rejected-with\nexport function promiseRejectedWith(reason: any): Promise {\n return originalPromiseReject(reason);\n}\n\nexport function PerformPromiseThen(\n promise: Promise,\n onFulfilled?: (value: T) => TResult1 | PromiseLike,\n onRejected?: (reason: any) => TResult2 | PromiseLike): Promise {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected) as Promise;\n}\n\n// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n// from that handler. To prevent this, return null instead of void from all handlers.\n// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\nexport function uponPromise(\n promise: Promise,\n onFulfilled?: (value: T) => null | PromiseLike,\n onRejected?: (reason: any) => null | PromiseLike): void {\n PerformPromiseThen(\n PerformPromiseThen(promise, onFulfilled, onRejected),\n undefined,\n rethrowAssertionErrorRejection\n );\n}\n\nexport function uponFulfillment(promise: Promise, onFulfilled: (value: T) => null | PromiseLike): void {\n uponPromise(promise, onFulfilled);\n}\n\nexport function uponRejection(promise: Promise, onRejected: (reason: any) => null | PromiseLike): void {\n uponPromise(promise, undefined, onRejected);\n}\n\nexport function transformPromiseWith(\n promise: Promise,\n fulfillmentHandler?: (value: T) => TResult1 | PromiseLike,\n rejectionHandler?: (reason: any) => TResult2 | PromiseLike): Promise {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\n\nexport function setPromiseIsHandledToTrue(promise: Promise): void {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\nlet _queueMicrotask: (callback: () => void) => void = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n } else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n};\n\nexport { _queueMicrotask as queueMicrotask };\n\nexport function reflectCall(F: (this: T, ...fnArgs: A) => R, V: T, args: A): R {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n}\n\nexport function promiseCall(F: (this: T, ...fnArgs: A) => R | PromiseLike,\n V: T,\n args: A): Promise {\n assert(typeof F === 'function');\n assert(V !== undefined);\n assert(Array.isArray(args));\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n } catch (value) {\n return promiseRejectedWith(value);\n }\n}\n","import assert from '../stub/assert';\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n\ninterface Node {\n _elements: T[];\n _next: Node | undefined;\n}\n\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nexport class SimpleQueue {\n private _front: Node;\n private _back: Node;\n private _cursor = 0;\n private _size = 0;\n\n constructor() {\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n\n get length(): number {\n return this._size;\n }\n\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element: T): void {\n const oldBack = this._back;\n let newBack = oldBack;\n assert(oldBack._next === undefined);\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n assert(elements.length === QUEUE_MAX_ARRAY_SIZE);\n assert(oldFront._next !== undefined);\n newFront = oldFront._next!;\n newCursor = 0;\n }\n\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined!;\n\n return element;\n }\n\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback: (element: T) => void): void {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n assert(node._next !== undefined);\n assert(i === QUEUE_MAX_ARRAY_SIZE);\n node = node._next!;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n}\n","export const AbortSteps = Symbol('[[AbortSteps]]');\nexport const ErrorSteps = Symbol('[[ErrorSteps]]');\nexport const CancelSteps = Symbol('[[CancelSteps]]');\nexport const PullSteps = Symbol('[[PullSteps]]');\nexport const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n","import assert from '../../stub/assert';\nimport { ReadableStream, ReadableStreamCancel, type ReadableStreamReader } from '../readable-stream';\nimport { newPromise, setPromiseIsHandledToTrue } from '../helpers/webidl';\nimport { ReleaseSteps } from '../abstract-ops/internal-methods';\n\nexport function ReadableStreamReaderGenericInitialize(reader: ReadableStreamReader, stream: ReadableStream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n } else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n } else {\n assert(stream._state === 'errored');\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n}\n\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\n\nexport function ReadableStreamReaderGenericCancel(reader: ReadableStreamReader, reason: any): Promise {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n return ReadableStreamCancel(stream, reason);\n}\n\nexport function ReadableStreamReaderGenericRelease(reader: ReadableStreamReader) {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n assert(stream._reader === reader);\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n } else {\n defaultReaderClosedPromiseResetToRejected(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n\n stream._readableStreamController[ReleaseSteps]();\n\n stream._reader = undefined;\n reader._ownerReadableStream = undefined!;\n}\n\n// Helper functions for the readers.\n\nexport function readerLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nexport function defaultReaderClosedPromiseInitialize(reader: ReadableStreamReader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n}\n\nexport function defaultReaderClosedPromiseInitializeAsRejected(reader: ReadableStreamReader, reason: any) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseInitializeAsResolved(reader: ReadableStreamReader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n}\n\nexport function defaultReaderClosedPromiseReject(reader: ReadableStreamReader, reason: any) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n\nexport function defaultReaderClosedPromiseResetToRejected(reader: ReadableStreamReader, reason: any) {\n assert(reader._closedPromise_resolve === undefined);\n assert(reader._closedPromise_reject === undefined);\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseResolve(reader: ReadableStreamReader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite: typeof Number.isFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n};\n\nexport default NumberIsFinite;\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc: typeof Math.trunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\nexport default MathTrunc;\n","import NumberIsFinite from '../../stub/number-isfinite';\nimport MathTrunc from '../../stub/math-trunc';\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nexport function isDictionary(x: any): x is object | null {\n return typeof x === 'object' || typeof x === 'function';\n}\n\nexport function assertDictionary(obj: unknown,\n context: string): asserts obj is object | null | undefined {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport type AnyFunction = (...args: any[]) => any;\n\n// https://heycam.github.io/webidl/#idl-callback-functions\nexport function assertFunction(x: unknown, context: string): asserts x is AnyFunction {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-object\nexport function isObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport function assertObject(x: unknown,\n context: string): asserts x is object {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport function assertRequiredArgument(x: T | undefined,\n position: number,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n}\n\nexport function assertRequiredField(x: T | undefined,\n field: string,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nexport function convertUnrestrictedDouble(value: unknown): number {\n return Number(value);\n}\n\nfunction censorNegativeZero(x: number): number {\n return x === 0 ? 0 : x;\n}\n\nfunction integerPart(x: number): number {\n return censorNegativeZero(MathTrunc(x));\n}\n\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nexport function convertUnsignedLongLongWithEnforceRange(value: unknown, context: string): number {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n\n let x = Number(value);\n x = censorNegativeZero(x);\n\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n\n x = integerPart(x);\n\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n\n return x;\n}\n","import { IsReadableStream, ReadableStream } from '../readable-stream';\n\nexport function assertReadableStream(x: unknown, context: string): asserts x is ReadableStream {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, ReadableStream } from '../readable-stream';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { PullSteps } from '../abstract-ops/internal-methods';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\n\n/**\n * A result returned by {@link ReadableStreamDefaultReader.read}.\n *\n * @public\n */\nexport type ReadableStreamDefaultReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value?: undefined;\n}\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamDefaultReader(stream: ReadableStream): ReadableStreamDefaultReader {\n return new ReadableStreamDefaultReader(stream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadRequest(stream: ReadableStream,\n readRequest: ReadRequest): void {\n assert(IsReadableStreamDefaultReader(stream._reader));\n assert(stream._state === 'readable');\n\n (stream._reader! as ReadableStreamDefaultReader)._readRequests.push(readRequest);\n}\n\nexport function ReadableStreamFulfillReadRequest(stream: ReadableStream, chunk: R | undefined, done: boolean) {\n const reader = stream._reader as ReadableStreamDefaultReader;\n\n assert(reader._readRequests.length > 0);\n\n const readRequest = reader._readRequests.shift()!;\n if (done) {\n readRequest._closeSteps();\n } else {\n readRequest._chunkSteps(chunk!);\n }\n}\n\nexport function ReadableStreamGetNumReadRequests(stream: ReadableStream): number {\n return (stream._reader as ReadableStreamDefaultReader)._readRequests.length;\n}\n\nexport function ReadableStreamHasDefaultReader(stream: ReadableStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadRequest {\n _chunkSteps(chunk: R): void;\n\n _closeSteps(): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamDefaultReader {\n /** @internal */\n _ownerReadableStream!: ReadableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(): Promise> {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamDefaultReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamDefaultReader(x: any): x is ReadableStreamDefaultReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultReader;\n}\n\nexport function ReadableStreamDefaultReaderRead(reader: ReadableStreamDefaultReader,\n readRequest: ReadRequest): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n } else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n } else {\n assert(stream._state === 'readable');\n stream._readableStreamController[PullSteps](readRequest as ReadRequest);\n }\n}\n\nexport function ReadableStreamDefaultReaderRelease(reader: ReadableStreamDefaultReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n}\n\nexport function ReadableStreamDefaultReaderErrorReadRequests(reader: ReadableStreamDefaultReader, e: any) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nfunction defaultReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n","/******************************************************************************\r\nCopyright (c) Microsoft Corporation.\r\n\r\nPermission to use, copy, modify, and/or distribute this software for any\r\npurpose with or without fee is hereby granted.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\r\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY\r\nAND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\r\n***************************************************************************** */\r\n/* global Reflect, Promise, SuppressedError, Symbol */\r\n\r\nvar extendStatics = function(d, b) {\r\n extendStatics = Object.setPrototypeOf ||\r\n ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\r\n return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n if (typeof b !== \"function\" && b !== null)\r\n throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\r\n extendStatics(d, b);\r\n function __() { this.constructor = d; }\r\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\nexport var __assign = function() {\r\n __assign = Object.assign || function __assign(t) {\r\n for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n s = arguments[i];\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n }\r\n return t;\r\n }\r\n return __assign.apply(this, arguments);\r\n}\r\n\r\nexport function __rest(s, e) {\r\n var t = {};\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\r\n t[p] = s[p];\r\n if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\r\n for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {\r\n if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))\r\n t[p[i]] = s[p[i]];\r\n }\r\n return t;\r\n}\r\n\r\nexport function __decorate(decorators, target, key, desc) {\r\n var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\r\n if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\r\n else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\r\n return c > 3 && r && Object.defineProperty(target, key, r), r;\r\n}\r\n\r\nexport function __param(paramIndex, decorator) {\r\n return function (target, key) { decorator(target, key, paramIndex); }\r\n}\r\n\r\nexport function __esDecorate(ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {\r\n function accept(f) { if (f !== void 0 && typeof f !== \"function\") throw new TypeError(\"Function expected\"); return f; }\r\n var kind = contextIn.kind, key = kind === \"getter\" ? \"get\" : kind === \"setter\" ? \"set\" : \"value\";\r\n var target = !descriptorIn && ctor ? contextIn[\"static\"] ? ctor : ctor.prototype : null;\r\n var descriptor = descriptorIn || (target ? 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(function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n var desc = Object.getOwnPropertyDescriptor(m, k);\r\n if (!desc || (\"get\" in desc ? !m.__esModule : desc.writable || desc.configurable)) {\r\n desc = { enumerable: true, get: function() { return m[k]; } };\r\n }\r\n Object.defineProperty(o, k2, desc);\r\n}) : (function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n o[k2] = m[k];\r\n});\r\n\r\nexport function __exportStar(m, o) {\r\n for (var p in m) if (p !== \"default\" && !Object.prototype.hasOwnProperty.call(o, p)) __createBinding(o, m, p);\r\n}\r\n\r\nexport function __values(o) {\r\n var s = typeof Symbol === \"function\" && Symbol.iterator, m = s && o[s], i = 0;\r\n if (m) return m.call(o);\r\n if (o && typeof o.length === \"number\") return {\r\n next: function () {\r\n if (o && i >= o.length) o = void 0;\r\n return { value: o && o[i++], done: !o };\r\n }\r\n };\r\n throw new TypeError(s ? \"Object is not iterable.\" : \"Symbol.iterator is not defined.\");\r\n}\r\n\r\nexport function __read(o, n) {\r\n var m = typeof Symbol === \"function\" && o[Symbol.iterator];\r\n if (!m) return o;\r\n var i = m.call(o), r, ar = [], e;\r\n try {\r\n while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\r\n }\r\n catch (error) { e = { error: error }; }\r\n finally {\r\n try {\r\n if (r && !r.done && (m = i[\"return\"])) m.call(i);\r\n }\r\n finally { if (e) throw e.error; }\r\n }\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spread() {\r\n for (var ar = [], i = 0; i < arguments.length; i++)\r\n ar = ar.concat(__read(arguments[i]));\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spreadArrays() {\r\n for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;\r\n for (var r = Array(s), k = 0, i = 0; i < il; i++)\r\n for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)\r\n r[k] = a[j];\r\n return r;\r\n}\r\n\r\nexport function __spreadArray(to, from, pack) {\r\n if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {\r\n if (ar || !(i in from)) {\r\n if (!ar) ar = Array.prototype.slice.call(from, 0, i);\r\n ar[i] = from[i];\r\n }\r\n }\r\n return to.concat(ar || Array.prototype.slice.call(from));\r\n}\r\n\r\nexport function __await(v) {\r\n return this instanceof __await ? (this.v = v, this) : new __await(v);\r\n}\r\n\r\nexport function __asyncGenerator(thisArg, _arguments, generator) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var g = generator.apply(thisArg, _arguments || []), i, q = [];\r\n return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\r\n function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\r\n function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\r\n function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n function fulfill(value) { resume(\"next\", value); }\r\n function reject(value) { resume(\"throw\", value); }\r\n function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n var i, p;\r\n return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var m = o[Symbol.asyncIterator], i;\r\n return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n return cooked;\r\n};\r\n\r\nvar __setModuleDefault = Object.create ? (function(o, v) {\r\n Object.defineProperty(o, \"default\", { enumerable: true, value: v });\r\n}) : function(o, v) {\r\n o[\"default\"] = v;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n if (mod && mod.__esModule) return mod;\r\n var result = {};\r\n if (mod != null) for (var k in mod) if (k !== \"default\" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);\r\n __setModuleDefault(result, mod);\r\n return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n\r\nexport function __classPrivateFieldGet(receiver, state, kind, f) {\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a getter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot read private member from an object whose class did not declare it\");\r\n return kind === \"m\" ? f : kind === \"a\" ? f.call(receiver) : f ? f.value : state.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, state, value, kind, f) {\r\n if (kind === \"m\") throw new TypeError(\"Private method is not writable\");\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a setter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot write private member to an object whose class did not declare it\");\r\n return (kind === \"a\" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;\r\n}\r\n\r\nexport function __classPrivateFieldIn(state, receiver) {\r\n if (receiver === null || (typeof receiver !== \"object\" && typeof receiver !== \"function\")) throw new TypeError(\"Cannot use 'in' operator on non-object\");\r\n return typeof state === \"function\" ? receiver === state : state.has(receiver);\r\n}\r\n\r\nexport function __addDisposableResource(env, value, async) {\r\n if (value !== null && value !== void 0) {\r\n if (typeof value !== \"object\" && typeof value !== \"function\") throw new TypeError(\"Object expected.\");\r\n var dispose;\r\n if (async) {\r\n if (!Symbol.asyncDispose) throw new TypeError(\"Symbol.asyncDispose is not defined.\");\r\n dispose = value[Symbol.asyncDispose];\r\n }\r\n if (dispose === void 0) {\r\n if (!Symbol.dispose) throw new TypeError(\"Symbol.dispose is not defined.\");\r\n dispose = value[Symbol.dispose];\r\n }\r\n if (typeof dispose !== \"function\") throw new TypeError(\"Object not disposable.\");\r\n env.stack.push({ value: value, dispose: dispose, async: async });\r\n }\r\n else if (async) {\r\n env.stack.push({ async: true });\r\n }\r\n return value;\r\n}\r\n\r\nvar _SuppressedError = typeof SuppressedError === \"function\" ? SuppressedError : function (error, suppressed, message) {\r\n var e = new Error(message);\r\n return e.name = \"SuppressedError\", e.error = error, e.suppressed = suppressed, e;\r\n};\r\n\r\nexport function __disposeResources(env) {\r\n function fail(e) {\r\n env.error = env.hasError ? new _SuppressedError(e, env.error, \"An error was suppressed during disposal.\") : e;\r\n env.hasError = true;\r\n }\r\n function next() {\r\n while (env.stack.length) {\r\n var rec = env.stack.pop();\r\n try {\r\n var result = rec.dispose && rec.dispose.call(rec.value);\r\n if (rec.async) return Promise.resolve(result).then(next, function(e) { fail(e); return next(); });\r\n }\r\n catch (e) {\r\n fail(e);\r\n }\r\n }\r\n if (env.hasError) throw env.error;\r\n }\r\n return next();\r\n}\r\n\r\nexport default {\r\n __extends: __extends,\r\n __assign: __assign,\r\n __rest: __rest,\r\n __decorate: __decorate,\r\n __param: __param,\r\n __metadata: __metadata,\r\n __awaiter: __awaiter,\r\n __generator: __generator,\r\n __createBinding: __createBinding,\r\n __exportStar: __exportStar,\r\n __values: __values,\r\n __read: __read,\r\n __spread: __spread,\r\n __spreadArrays: __spreadArrays,\r\n __spreadArray: __spreadArray,\r\n __await: __await,\r\n __asyncGenerator: __asyncGenerator,\r\n __asyncDelegator: __asyncDelegator,\r\n __asyncValues: __asyncValues,\r\n __makeTemplateObject: __makeTemplateObject,\r\n __importStar: __importStar,\r\n __importDefault: __importDefault,\r\n __classPrivateFieldGet: __classPrivateFieldGet,\r\n __classPrivateFieldSet: __classPrivateFieldSet,\r\n __classPrivateFieldIn: __classPrivateFieldIn,\r\n __addDisposableResource: __addDisposableResource,\r\n __disposeResources: __disposeResources,\r\n};\r\n","import { reflectCall } from 'lib/helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport assert from '../../stub/assert';\n\ndeclare global {\n interface ArrayBuffer {\n readonly detached: boolean;\n\n transfer(): ArrayBuffer;\n }\n\n function structuredClone(value: T, options: { transfer: ArrayBuffer[] }): T;\n}\n\nexport function CreateArrayFromList(elements: T): T {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice() as T;\n}\n\nexport function CopyDataBlockBytes(dest: ArrayBuffer,\n destOffset: number,\n src: ArrayBuffer,\n srcOffset: number,\n n: number) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n\nexport let TransferArrayBuffer = (O: ArrayBuffer): ArrayBuffer => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n } else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n } else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n};\n\nexport function CanTransferArrayBuffer(O: ArrayBuffer): boolean {\n return !IsDetachedBuffer(O);\n}\n\nexport let IsDetachedBuffer = (O: ArrayBuffer): boolean => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n } else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n};\n\nexport function ArrayBufferSlice(buffer: ArrayBuffer, begin: number, end: number): ArrayBuffer {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n}\n\nexport type MethodName = {\n [P in keyof T]: T[P] extends Function | undefined ? P : never;\n}[keyof T];\n\nexport function GetMethod>(receiver: T, prop: K): T[K] | undefined {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n}\n\nexport interface SyncIteratorRecord {\n iterator: Iterator,\n nextMethod: Iterator['next'],\n done: boolean;\n}\n\nexport interface AsyncIteratorRecord {\n iterator: AsyncIterator,\n nextMethod: AsyncIterator['next'],\n done: boolean;\n}\n\nexport type SyncOrAsyncIteratorRecord = SyncIteratorRecord | AsyncIteratorRecord;\n\nexport function CreateAsyncFromSyncIterator(syncIteratorRecord: SyncIteratorRecord): AsyncIteratorRecord {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n}\n\n// Aligns with core-js/modules/es.symbol.async-iterator.js\nexport const SymbolAsyncIterator: (typeof Symbol)['asyncIterator'] =\n Symbol.asyncIterator ??\n Symbol.for?.('Symbol.asyncIterator') ??\n '@@asyncIterator';\n\nexport type SyncOrAsyncIterable = Iterable | AsyncIterable;\nexport type SyncOrAsyncIteratorMethod = () => (Iterator | AsyncIterator);\n\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint: 'async',\n method?: SyncOrAsyncIteratorMethod\n): AsyncIteratorRecord;\nfunction GetIterator(\n obj: Iterable,\n hint: 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncIteratorRecord;\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint = 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncOrAsyncIteratorRecord {\n assert(hint === 'sync' || hint === 'async');\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj as AsyncIterable, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj as Iterable, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj as Iterable, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n } else {\n method = GetMethod(obj as Iterable, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false } as SyncOrAsyncIteratorRecord;\n}\n\nexport { GetIterator };\n\nexport function IteratorNext(iteratorRecord: AsyncIteratorRecord): Promise> {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n}\n\nexport function IteratorComplete(\n iterResult: IteratorResult\n): iterResult is IteratorReturnResult {\n assert(typeIsObject(iterResult));\n return Boolean(iterResult.done);\n}\n\nexport function IteratorValue(iterResult: IteratorYieldResult): T {\n assert(typeIsObject(iterResult));\n return iterResult.value;\n}\n","/// \n\nimport { SymbolAsyncIterator } from '../../../lib/abstract-ops/ecmascript';\n\n// We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it.\nexport const AsyncIteratorPrototype: AsyncIterable = {\n // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( )\n // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator\n [SymbolAsyncIterator](this: AsyncIterator) {\n return this;\n }\n};\nObject.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false });\n","/// \n\nimport { ReadableStream } from '../readable-stream';\nimport {\n AcquireReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadableStreamDefaultReadResult,\n type ReadRequest\n} from './default-reader';\nimport { ReadableStreamReaderGenericCancel, ReadableStreamReaderGenericRelease } from './generic-reader';\nimport assert from '../../stub/assert';\nimport { AsyncIteratorPrototype } from '@@target/stub/async-iterator-prototype';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n queueMicrotask,\n transformPromiseWith\n} from '../helpers/webidl';\n\n/**\n * An async iterator returned by {@link ReadableStream.values}.\n *\n * @public\n */\nexport interface ReadableStreamAsyncIterator extends AsyncIterableIterator {\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nexport class ReadableStreamAsyncIteratorImpl {\n private readonly _reader: ReadableStreamDefaultReader;\n private readonly _preventCancel: boolean;\n private _ongoingPromise: Promise> | undefined = undefined;\n private _isFinished = false;\n\n constructor(reader: ReadableStreamDefaultReader, preventCancel: boolean) {\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n\n next(): Promise> {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n\n return(value: any): Promise> {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n\n private _nextSteps(): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n\n private _returnSteps(value: any): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n assert(reader._readRequests.length === 0);\n\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n}\n\ninterface ReadableStreamAsyncIteratorInstance extends ReadableStreamAsyncIterator {\n /** @interal */\n _asyncIteratorImpl: ReadableStreamAsyncIteratorImpl;\n\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nconst ReadableStreamAsyncIteratorPrototype: ReadableStreamAsyncIteratorInstance = {\n next(this: ReadableStreamAsyncIteratorInstance): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n\n return(this: ReadableStreamAsyncIteratorInstance, value: any): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n} as any;\nObject.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamAsyncIterator(stream: ReadableStream,\n preventCancel: boolean): ReadableStreamAsyncIterator {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator: ReadableStreamAsyncIteratorInstance = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n}\n\nfunction IsReadableStreamAsyncIterator(x: any): x is ReadableStreamAsyncIterator {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n\n try {\n // noinspection SuspiciousTypeOfGuard\n return (x as ReadableStreamAsyncIteratorInstance)._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n } catch {\n return false;\n }\n}\n\n// Helper functions for the ReadableStream.\n\nfunction streamAsyncIteratorBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN: typeof Number.isNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n};\n\nexport default NumberIsNaN;\n","import NumberIsNaN from '../../stub/number-isnan';\nimport { ArrayBufferSlice } from './ecmascript';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function IsNonNegativeNumber(v: number): boolean {\n if (typeof v !== 'number') {\n return false;\n }\n\n if (NumberIsNaN(v)) {\n return false;\n }\n\n if (v < 0) {\n return false;\n }\n\n return true;\n}\n\nexport function CloneAsUint8Array(O: NonShared): NonShared {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer) as NonShared;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsNonNegativeNumber } from './miscellaneous';\n\nexport interface QueueContainer {\n _queue: SimpleQueue;\n _queueTotalSize: number;\n}\n\nexport interface QueuePair {\n value: T;\n size: number;\n}\n\nexport function DequeueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.shift()!;\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n\n return pair.value;\n}\n\nexport function EnqueueValueWithSize(container: QueueContainer>, value: T, size: number) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n}\n\nexport function PeekQueueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.peek();\n return pair.value;\n}\n\nexport function ResetQueue(container: QueueContainer) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n}\n","export type TypedArray =\n | Int8Array\n | Uint8Array\n | Uint8ClampedArray\n | Int16Array\n | Uint16Array\n | Int32Array\n | Uint32Array\n | Float32Array\n | Float64Array;\n\nexport type NonShared = T & {\n buffer: ArrayBuffer;\n}\n\nexport interface ArrayBufferViewConstructor {\n new(buffer: ArrayBuffer, byteOffset: number, length?: number): T;\n\n readonly prototype: T;\n}\n\nexport interface TypedArrayConstructor extends ArrayBufferViewConstructor {\n readonly BYTES_PER_ELEMENT: number;\n}\n\nexport type DataViewConstructor = ArrayBufferViewConstructor;\n\nfunction isDataViewConstructor(ctor: Function): ctor is DataViewConstructor {\n return ctor === DataView;\n}\n\nexport function isDataView(view: ArrayBufferView): view is DataView {\n return isDataViewConstructor(view.constructor);\n}\n\nexport function arrayBufferViewElementSize(ctor: ArrayBufferViewConstructor): number {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return (ctor as unknown as TypedArrayConstructor).BYTES_PER_ELEMENT;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n IsReadableStreamDefaultReader,\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n ReadableStreamHasDefaultReader,\n type ReadRequest\n} from './default-reader';\nimport {\n ReadableStreamAddReadIntoRequest,\n ReadableStreamFulfillReadIntoRequest,\n ReadableStreamGetNumReadIntoRequests,\n ReadableStreamHasBYOBReader,\n type ReadIntoRequest\n} from './byob-reader';\nimport NumberIsInteger from '../../stub/number-isinteger';\nimport {\n IsReadableStreamLocked,\n type ReadableByteStream,\n ReadableStreamClose,\n ReadableStreamError\n} from '../readable-stream';\nimport type { ValidatedUnderlyingByteSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport {\n ArrayBufferSlice,\n CanTransferArrayBuffer,\n CopyDataBlockBytes,\n IsDetachedBuffer,\n TransferArrayBuffer\n} from '../abstract-ops/ecmascript';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\nimport { assertRequiredArgument, convertUnsignedLongLongWithEnforceRange } from '../validators/basic';\nimport {\n type ArrayBufferViewConstructor,\n arrayBufferViewElementSize,\n type NonShared,\n type TypedArrayConstructor\n} from '../helpers/array-buffer-view';\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nexport class ReadableStreamBYOBRequest {\n /** @internal */\n _associatedReadableByteStreamController!: ReadableByteStreamController;\n /** @internal */\n _view!: NonShared | null;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view(): ArrayBufferView | null {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n\n return this._view;\n }\n\n /**\n * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into\n * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer.\n *\n * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer\n * modifiable.\n */\n respond(bytesWritten: number): void;\n respond(bytesWritten: number | undefined): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(this._view!.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n\n assert(this._view!.byteLength > 0);\n assert(this._view!.buffer.byteLength > 0);\n\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n\n /**\n * Indicates to the associated readable byte stream that instead of writing into\n * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`,\n * which will be given to the consumer of the readable byte stream.\n *\n * After this method is called, `view` will be transferred and no longer modifiable.\n */\n respondWithNewView(view: ArrayBufferView): void;\n respondWithNewView(view: NonShared): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n}\n\ninterface ByteQueueElement {\n buffer: ArrayBuffer;\n byteOffset: number;\n byteLength: number;\n}\n\ntype PullIntoDescriptor = NonShared> =\n DefaultPullIntoDescriptor\n | BYOBPullIntoDescriptor;\n\ninterface DefaultPullIntoDescriptor {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: TypedArrayConstructor;\n readerType: 'default' | 'none';\n}\n\ninterface BYOBPullIntoDescriptor = NonShared> {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: ArrayBufferViewConstructor;\n readerType: 'byob' | 'none';\n}\n\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableByteStreamController {\n /** @internal */\n _controlledReadableByteStream!: ReadableByteStream;\n /** @internal */\n _queue!: SimpleQueue;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n /** @internal */\n _autoAllocateChunkSize: number | undefined;\n /** @internal */\n _byobRequest: ReadableStreamBYOBRequest | null;\n /** @internal */\n _pendingPullIntos!: SimpleQueue;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest(): ReadableStreamBYOBRequest | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n\n ReadableByteStreamControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk chunk in the controlled readable stream.\n * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown.\n */\n enqueue(chunk: ArrayBufferView): void;\n enqueue(chunk: NonShared): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n\n ReadableByteStreamControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n\n ResetQueue(this);\n\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest>): void {\n const stream = this._controlledReadableByteStream;\n assert(ReadableStreamHasDefaultReader(stream));\n\n if (this._queueTotalSize > 0) {\n assert(ReadableStreamGetNumReadRequests(stream) === 0);\n\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer: ArrayBuffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n } catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n\n const pullIntoDescriptor: DefaultPullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n}\n\nObject.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableByteStreamController.prototype.close, 'close');\nsetFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableByteStreamController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableByteStreamController.\n\nexport function IsReadableByteStreamController(x: any): x is ReadableByteStreamController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n\n return x instanceof ReadableByteStreamController;\n}\n\nfunction IsReadableStreamBYOBRequest(x: any): x is ReadableStreamBYOBRequest {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBRequest;\n}\n\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller: ReadableByteStreamController): void {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller: ReadableByteStreamController) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n}\n\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor>(\n stream: ReadableByteStream,\n pullIntoDescriptor: PullIntoDescriptor\n) {\n assert(stream._state !== 'errored');\n assert(pullIntoDescriptor.readerType !== 'none');\n\n let done = false;\n if (stream._state === 'closed') {\n assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);\n done = true;\n }\n\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView as unknown as NonShared, done);\n } else {\n assert(pullIntoDescriptor.readerType === 'byob');\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n}\n\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor>(\n pullIntoDescriptor: PullIntoDescriptor\n): T {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n\n assert(bytesFilled <= pullIntoDescriptor.byteLength);\n assert(bytesFilled % elementSize === 0);\n\n return new pullIntoDescriptor.viewConstructor(\n pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize) as T;\n}\n\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n}\n\nfunction ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n } catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n}\n\nfunction ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.readerType === 'none');\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n firstDescriptor.buffer,\n firstDescriptor.byteOffset,\n firstDescriptor.bytesFilled\n );\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n}\n\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller: ReadableByteStreamController,\n pullIntoDescriptor: PullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize,\n pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n\n const queue = controller._queue;\n\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n } else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n\n if (!ready) {\n assert(controller._queueTotalSize === 0);\n assert(pullIntoDescriptor.bytesFilled > 0);\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n }\n\n return ready;\n}\n\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller: ReadableByteStreamController,\n size: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);\n assert(controller._byobRequest === null);\n pullIntoDescriptor.bytesFilled += size;\n}\n\nfunction ReadableByteStreamControllerHandleQueueDrain(controller: ReadableByteStreamController) {\n assert(controller._controlledReadableByteStream._state === 'readable');\n\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n } else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n}\n\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller: ReadableByteStreamController) {\n if (controller._byobRequest === null) {\n return;\n }\n\n controller._byobRequest._associatedReadableByteStreamController = undefined!;\n controller._byobRequest._view = null!;\n controller._byobRequest = null;\n}\n\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller: ReadableByteStreamController) {\n assert(!controller._closeRequested);\n\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n assert(pullIntoDescriptor.readerType !== 'none');\n\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n ReadableByteStreamControllerCommitPullIntoDescriptor(\n controller._controlledReadableByteStream,\n pullIntoDescriptor\n );\n }\n }\n}\n\nfunction ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller: ReadableByteStreamController) {\n const reader = controller._controlledReadableByteStream._reader;\n assert(IsReadableStreamDefaultReader(reader));\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n}\n\nexport function ReadableByteStreamControllerPullInto>(\n controller: ReadableByteStreamController,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = controller._controlledReadableByteStream;\n\n const ctor = view.constructor as ArrayBufferViewConstructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n\n const { byteOffset, byteLength } = view;\n\n const minimumFill = min * elementSize;\n assert(minimumFill >= elementSize && minimumFill <= byteLength);\n assert(minimumFill % elementSize === 0);\n\n let buffer: ArrayBuffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n } catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n\n const pullIntoDescriptor: BYOBPullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInClosedState(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.bytesFilled % firstDescriptor.elementSize === 0);\n\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n}\n\nfunction ReadableByteStreamControllerRespondInReadableState(controller: ReadableByteStreamController,\n bytesWritten: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n pullIntoDescriptor.buffer,\n end - remainderSize,\n remainderSize\n );\n }\n\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInternal(controller: ReadableByteStreamController, bytesWritten: number) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n assert(CanTransferArrayBuffer(firstDescriptor.buffer));\n\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n assert(bytesWritten === 0);\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n } else {\n assert(state === 'readable');\n assert(bytesWritten > 0);\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerShiftPendingPullInto(\n controller: ReadableByteStreamController\n): PullIntoDescriptor {\n assert(controller._byobRequest === null);\n const descriptor = controller._pendingPullIntos.shift()!;\n return descriptor;\n}\n\nfunction ReadableByteStreamControllerShouldCallPull(controller: ReadableByteStreamController): boolean {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return false;\n }\n\n if (controller._closeRequested) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableByteStreamControllerClearAlgorithms(controller: ReadableByteStreamController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\n\nexport function ReadableByteStreamControllerClose(controller: ReadableByteStreamController) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n\n return;\n }\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n throw e;\n }\n }\n\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n}\n\nexport function ReadableByteStreamControllerEnqueue(\n controller: ReadableByteStreamController,\n chunk: NonShared\n) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError(\n 'The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk'\n );\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n assert(controller._pendingPullIntos.length === 0);\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n } else {\n assert(controller._queue.length === 0);\n if (controller._pendingPullIntos.length > 0) {\n assert(controller._pendingPullIntos.peek().readerType === 'default');\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView as NonShared, false);\n }\n } else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n } else {\n assert(!IsReadableStreamLocked(stream));\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableByteStreamControllerError(controller: ReadableByteStreamController, e: any) {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableByteStreamControllerFillReadRequestFromQueue(\n controller: ReadableByteStreamController,\n readRequest: ReadRequest>\n) {\n assert(controller._queueTotalSize > 0);\n\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view as NonShared);\n}\n\nexport function ReadableByteStreamControllerGetBYOBRequest(\n controller: ReadableByteStreamController\n): ReadableStreamBYOBRequest | null {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer,\n firstDescriptor.byteOffset + firstDescriptor.bytesFilled,\n firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n\n const byobRequest: ReadableStreamBYOBRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view as NonShared);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n}\n\nfunction ReadableByteStreamControllerGetDesiredSize(controller: ReadableByteStreamController): number | null {\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nexport function ReadableByteStreamControllerRespond(controller: ReadableByteStreamController, bytesWritten: number) {\n assert(controller._pendingPullIntos.length > 0);\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n}\n\nexport function ReadableByteStreamControllerRespondWithNewView(controller: ReadableByteStreamController,\n view: NonShared) {\n assert(controller._pendingPullIntos.length > 0);\n assert(!IsDetachedBuffer(view.buffer));\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (view.byteLength === 0) {\n throw new TypeError(\n 'The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'\n );\n }\n }\n\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n}\n\nexport function SetUpReadableByteStreamController(stream: ReadableByteStream,\n controller: ReadableByteStreamController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n autoAllocateChunkSize: number | undefined) {\n assert(stream._readableStreamController === undefined);\n if (autoAllocateChunkSize !== undefined) {\n assert(NumberIsInteger(autoAllocateChunkSize));\n assert(autoAllocateChunkSize > 0);\n }\n\n controller._controlledReadableByteStream = stream;\n\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._byobRequest = null;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._closeRequested = false;\n controller._started = false;\n\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n\n controller._pendingPullIntos = new SimpleQueue();\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableByteStreamControllerFromUnderlyingSource(\n stream: ReadableByteStream,\n underlyingByteSource: ValidatedUnderlyingByteSource,\n highWaterMark: number\n) {\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n\n SetUpReadableByteStreamController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize\n );\n}\n\nfunction SetUpReadableStreamBYOBRequest(request: ReadableStreamBYOBRequest,\n controller: ReadableByteStreamController,\n view: NonShared) {\n assert(IsReadableByteStreamController(controller));\n assert(typeof view === 'object');\n assert(ArrayBuffer.isView(view));\n assert(!IsDetachedBuffer(view.buffer));\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n}\n\n// Helper functions for the ReadableStreamBYOBRequest.\n\nfunction byobRequestBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n}\n\n// Helper functions for the ReadableByteStreamController.\n\nfunction byteStreamControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n}\n","import { assertDictionary, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from '../readable-stream/reader-options';\n\nexport function convertReaderOptions(options: ReadableStreamGetReaderOptions | null | undefined,\n context: string): ReadableStreamGetReaderOptions {\n assertDictionary(options, context);\n const mode = options?.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n}\n\nfunction convertReadableStreamReaderMode(mode: string, context: string): 'byob' {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n}\n\nexport function convertByobReadOptions(\n options: ReadableStreamBYOBReaderReadOptions | null | undefined,\n context: string\n): ValidatedReadableStreamBYOBReaderReadOptions {\n assertDictionary(options, context);\n const min = options?.min ?? 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(\n min,\n `${context} has member 'min' that`\n )\n };\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, type ReadableByteStream, type ReadableStream } from '../readable-stream';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamController,\n ReadableByteStreamControllerPullInto\n} from './byte-stream-controller';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\nimport { IsDetachedBuffer } from '../abstract-ops/ecmascript';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from './reader-options';\nimport { convertByobReadOptions } from '../validators/reader-options';\nimport { isDataView, type NonShared, type TypedArray } from '../helpers/array-buffer-view';\n\n/**\n * A result returned by {@link ReadableStreamBYOBReader.read}.\n *\n * @public\n */\nexport type ReadableStreamBYOBReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value: T | undefined;\n};\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamBYOBReader(stream: ReadableByteStream): ReadableStreamBYOBReader {\n return new ReadableStreamBYOBReader(stream as ReadableStream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadIntoRequest>(\n stream: ReadableByteStream,\n readIntoRequest: ReadIntoRequest\n): void {\n assert(IsReadableStreamBYOBReader(stream._reader));\n assert(stream._state === 'readable' || stream._state === 'closed');\n\n (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);\n}\n\nexport function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,\n chunk: ArrayBufferView,\n done: boolean) {\n const reader = stream._reader as ReadableStreamBYOBReader;\n\n assert(reader._readIntoRequests.length > 0);\n\n const readIntoRequest = reader._readIntoRequests.shift()!;\n if (done) {\n readIntoRequest._closeSteps(chunk);\n } else {\n readIntoRequest._chunkSteps(chunk);\n }\n}\n\nexport function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {\n return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;\n}\n\nexport function ReadableStreamHasBYOBReader(stream: ReadableByteStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadIntoRequest> {\n _chunkSteps(chunk: T): void;\n\n _closeSteps(chunk: T | undefined): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamBYOBReader {\n /** @internal */\n _ownerReadableStream!: ReadableByteStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readIntoRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readIntoRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Attempts to reads bytes into view, and returns a promise resolved with the result.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(\n view: T,\n options?: ReadableStreamBYOBReaderReadOptions\n ): Promise>;\n read>(\n view: T,\n rawOptions: ReadableStreamBYOBReaderReadOptions | null | undefined = {}\n ): Promise> {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n\n let options: ValidatedReadableStreamBYOBReaderReadOptions;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > (view as unknown as TypedArray).length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n } else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamBYOBReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest: ReadIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamBYOBReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBReader;\n}\n\nexport function ReadableStreamBYOBReaderRead>(\n reader: ReadableStreamBYOBReader,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n } else {\n ReadableByteStreamControllerPullInto(\n stream._readableStreamController as ReadableByteStreamController,\n view,\n min,\n readIntoRequest\n );\n }\n}\n\nexport function ReadableStreamBYOBReaderRelease(reader: ReadableStreamBYOBReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n}\n\nexport function ReadableStreamBYOBReaderErrorReadIntoRequests(reader: ReadableStreamBYOBReader, e: any) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamBYOBReader.\n\nfunction byobReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport NumberIsNaN from '../../stub/number-isnan';\n\nexport function ExtractHighWaterMark(strategy: QueuingStrategy, defaultHWM: number): number {\n const { highWaterMark } = strategy;\n\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n\n return highWaterMark;\n}\n\nexport function ExtractSizeAlgorithm(strategy: QueuingStrategy): QueuingStrategySizeCallback {\n const { size } = strategy;\n\n if (!size) {\n return () => 1;\n }\n\n return size;\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport { assertDictionary, assertFunction, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategy(init: QueuingStrategy | null | undefined,\n context: string): QueuingStrategy {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n const size = init?.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n}\n\nfunction convertQueuingStrategySize(fn: QueuingStrategySizeCallback,\n context: string): QueuingStrategySizeCallback {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from '../writable-stream/underlying-sink';\nimport { WritableStreamDefaultController } from '../writable-stream';\n\nexport function convertUnderlyingSink(original: UnderlyingSink | null,\n context: string): ValidatedUnderlyingSink {\n assertDictionary(original, context);\n const abort = original?.abort;\n const close = original?.close;\n const start = original?.start;\n const type = original?.type;\n const write = original?.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original!, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original!, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original!, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original!, `${context} has member 'write' that`),\n type\n };\n}\n\nfunction convertUnderlyingSinkAbortCallback(\n fn: UnderlyingSinkAbortCallback,\n original: UnderlyingSink,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSinkCloseCallback(\n fn: UnderlyingSinkCloseCallback,\n original: UnderlyingSink,\n context: string\n): () => Promise {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n}\n\nfunction convertUnderlyingSinkStartCallback(\n fn: UnderlyingSinkStartCallback,\n original: UnderlyingSink,\n context: string\n): UnderlyingSinkStartCallback {\n assertFunction(fn, context);\n return (controller: WritableStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSinkWriteCallback(\n fn: UnderlyingSinkWriteCallback,\n original: UnderlyingSink,\n context: string\n): (chunk: W, controller: WritableStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: W, controller: WritableStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n","import { IsWritableStream, WritableStream } from '../writable-stream';\n\nexport function assertWritableStream(x: unknown, context: string): asserts x is WritableStream {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n}\n","/**\n * A signal object that allows you to communicate with a request and abort it if required\n * via its associated `AbortController` object.\n *\n * @remarks\n * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @public\n */\nexport interface AbortSignal {\n /**\n * Whether the request is aborted.\n */\n readonly aborted: boolean;\n\n /**\n * If aborted, returns the reason for aborting.\n */\n readonly reason?: any;\n\n /**\n * Add an event listener to be triggered when this signal becomes aborted.\n */\n addEventListener(type: 'abort', listener: () => void): void;\n\n /**\n * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}.\n */\n removeEventListener(type: 'abort', listener: () => void): void;\n}\n\nexport function isAbortSignal(value: unknown): value is AbortSignal {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof (value as AbortSignal).aborted === 'boolean';\n } catch {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n}\n\n/**\n * A controller object that allows you to abort an `AbortSignal` when desired.\n *\n * @remarks\n * This interface is compatible with the `AbortController` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @internal\n */\nexport interface AbortController {\n readonly signal: AbortSignal;\n\n abort(reason?: any): void;\n}\n\ninterface AbortControllerConstructor {\n new(): AbortController;\n}\n\nconst supportsAbortController = typeof (AbortController as any) === 'function';\n\n/**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\nexport function createAbortController(): AbortController | undefined {\n if (supportsAbortController) {\n return new (AbortController as AbortControllerConstructor)();\n }\n return undefined;\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponPromise\n} from './helpers/webidl';\nimport {\n DequeueValue,\n EnqueueValueWithSize,\n PeekQueueValue,\n type QueuePair,\n ResetQueue\n} from './abstract-ops/queue-with-sizes';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { SimpleQueue } from './simple-queue';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { AbortSteps, ErrorSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from './writable-stream/underlying-sink';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertUnderlyingSink } from './validators/underlying-sink';\nimport { assertWritableStream } from './validators/writable-stream';\nimport { type AbortController, type AbortSignal, createAbortController } from './abort-signal';\n\ntype WritableStreamState = 'writable' | 'closed' | 'erroring' | 'errored';\n\ninterface WriteOrCloseRequest {\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n}\n\ntype WriteRequest = WriteOrCloseRequest;\ntype CloseRequest = WriteOrCloseRequest;\n\ninterface PendingAbortRequest {\n _promise: Promise;\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n _reason: any;\n _wasAlreadyErroring: boolean;\n}\n\n/**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\nclass WritableStream {\n /** @internal */\n _state!: WritableStreamState;\n /** @internal */\n _storedError: any;\n /** @internal */\n _writer: WritableStreamDefaultWriter | undefined;\n /** @internal */\n _writableStreamController!: WritableStreamDefaultController;\n /** @internal */\n _writeRequests!: SimpleQueue;\n /** @internal */\n _inFlightWriteRequest: WriteRequest | undefined;\n /** @internal */\n _closeRequest: CloseRequest | undefined;\n /** @internal */\n _inFlightCloseRequest: CloseRequest | undefined;\n /** @internal */\n _pendingAbortRequest: PendingAbortRequest | undefined;\n /** @internal */\n _backpressure!: boolean;\n\n constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSink: UnderlyingSink | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n } else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n\n InitializeWritableStream(this);\n\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked(): boolean {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsWritableStreamLocked(this);\n }\n\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('abort'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n\n return WritableStreamAbort(this, reason);\n }\n\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('close'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamClose(this);\n }\n\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter(): WritableStreamDefaultWriter {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('getWriter');\n }\n\n return AcquireWritableStreamDefaultWriter(this);\n }\n}\n\nObject.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(WritableStream.prototype.abort, 'abort');\nsetFunctionName(WritableStream.prototype.close, 'close');\nsetFunctionName(WritableStream.prototype.getWriter, 'getWriter');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n}\n\nexport {\n AcquireWritableStreamDefaultWriter,\n CreateWritableStream,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamDefaultControllerErrorIfNeeded,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite,\n WritableStreamCloseQueuedOrInFlight\n};\n\nexport type {\n UnderlyingSink,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkAbortCallback\n};\n\n// Abstract operations for the WritableStream.\n\nfunction AcquireWritableStreamDefaultWriter(stream: WritableStream): WritableStreamDefaultWriter {\n return new WritableStreamDefaultWriter(stream);\n}\n\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: WritableStream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n\n const controller: WritableStreamDefaultController = Object.create(WritableStreamDefaultController.prototype);\n\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm,\n abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n}\n\nfunction InitializeWritableStream(stream: WritableStream) {\n stream._state = 'writable';\n\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n\n stream._writer = undefined;\n\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined!;\n\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n}\n\nfunction IsWritableStream(x: unknown): x is WritableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n\n return x instanceof WritableStream;\n}\n\nfunction IsWritableStreamLocked(stream: WritableStream): boolean {\n assert(IsWritableStream(stream));\n\n if (stream._writer === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamAbort(stream: WritableStream, reason: any): Promise {\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n stream._writableStreamController._abortController?.abort(reason);\n\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state as WritableStreamState;\n\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined!,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest!._promise = promise;\n\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n\n return promise;\n}\n\nfunction WritableStreamClose(stream: WritableStream): Promise {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(\n `The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n\n assert(state === 'writable' || state === 'erroring');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const promise = newPromise((resolve, reject) => {\n const closeRequest: CloseRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._closeRequest = closeRequest;\n });\n\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n\n return promise;\n}\n\n// WritableStream API exposed for controllers.\n\nfunction WritableStreamAddWriteRequest(stream: WritableStream): Promise {\n assert(IsWritableStreamLocked(stream));\n assert(stream._state === 'writable');\n\n const promise = newPromise((resolve, reject) => {\n const writeRequest: WriteRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._writeRequests.push(writeRequest);\n });\n\n return promise;\n}\n\nfunction WritableStreamDealWithRejection(stream: WritableStream, error: any) {\n const state = stream._state;\n\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n\n assert(state === 'erroring');\n WritableStreamFinishErroring(stream);\n}\n\nfunction WritableStreamStartErroring(stream: WritableStream, reason: any) {\n assert(stream._storedError === undefined);\n assert(stream._state === 'writable');\n\n const controller = stream._writableStreamController;\n assert(controller !== undefined);\n\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n}\n\nfunction WritableStreamFinishErroring(stream: WritableStream) {\n assert(stream._state === 'erroring');\n assert(!WritableStreamHasOperationMarkedInFlight(stream));\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(\n promise,\n () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n },\n (reason: any) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n}\n\nfunction WritableStreamFinishInFlightWrite(stream: WritableStream) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n}\n\nfunction WritableStreamFinishInFlightWriteWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._reject(error);\n stream._inFlightWriteRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n WritableStreamDealWithRejection(stream, error);\n}\n\nfunction WritableStreamFinishInFlightClose(stream: WritableStream) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n\n const state = stream._state;\n\n assert(state === 'writable' || state === 'erroring');\n\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n\n stream._state = 'closed';\n\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n\n assert(stream._pendingAbortRequest === undefined);\n assert(stream._storedError === undefined);\n}\n\nfunction WritableStreamFinishInFlightCloseWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._reject(error);\n stream._inFlightCloseRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n}\n\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream: WritableStream): boolean {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamHasOperationMarkedInFlight(stream: WritableStream): boolean {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamMarkCloseRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightCloseRequest === undefined);\n assert(stream._closeRequest !== undefined);\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n}\n\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightWriteRequest === undefined);\n assert(stream._writeRequests.length !== 0);\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\n\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream: WritableStream) {\n assert(stream._state === 'errored');\n if (stream._closeRequest !== undefined) {\n assert(stream._inFlightCloseRequest === undefined);\n\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n}\n\nfunction WritableStreamUpdateBackpressure(stream: WritableStream, backpressure: boolean) {\n assert(stream._state === 'writable');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n } else {\n assert(!backpressure);\n\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n\n stream._backpressure = backpressure;\n}\n\n/**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\nexport class WritableStreamDefaultWriter {\n /** @internal */\n _ownerWritableStream: WritableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _closedPromiseState!: 'pending' | 'resolved' | 'rejected';\n /** @internal */\n _readyPromise!: Promise;\n /** @internal */\n _readyPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _readyPromise_reject?: (reason: any) => void;\n /** @internal */\n _readyPromiseState!: 'pending' | 'fulfilled' | 'rejected';\n\n constructor(stream: WritableStream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n\n this._ownerWritableStream = stream;\n stream._writer = this;\n\n const state = stream._state;\n\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n } else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n } else {\n assert(state === 'errored');\n\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize(): number | null {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n\n return this._readyPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamDefaultWriterClose(this);\n }\n\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock(): void {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return;\n }\n\n assert(stream._writer !== undefined);\n\n WritableStreamDefaultWriterRelease(this);\n }\n\n /**\n * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully,\n * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return\n * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes\n * errored before the writing process is initiated.\n *\n * Note that what \"success\" means is up to the underlying sink; it might indicate simply that the chunk has been\n * accepted, and not necessarily that it is safely saved to its ultimate destination.\n */\n write(chunk: W): Promise;\n write(chunk: W = undefined!): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n});\nsetFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\nsetFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\nsetFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\nsetFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n}\n\n// Abstract operations for the WritableStreamDefaultWriter.\n\nfunction IsWritableStreamDefaultWriter(x: any): x is WritableStreamDefaultWriter {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultWriter;\n}\n\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultWriterAbort(writer: WritableStreamDefaultWriter, reason: any) {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamAbort(stream, reason);\n}\n\nfunction WritableStreamDefaultWriterClose(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamClose(stream);\n}\n\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n return WritableStreamDefaultWriterClose(writer);\n}\n\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n } else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n } else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterGetDesiredSize(writer: WritableStreamDefaultWriter): number | null {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n\n if (state === 'closed') {\n return 0;\n }\n\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\n\nfunction WritableStreamDefaultWriterRelease(writer: WritableStreamDefaultWriter) {\n const stream = writer._ownerWritableStream;\n assert(stream !== undefined);\n assert(stream._writer === writer);\n\n const releasedError = new TypeError(\n `Writer was released and can no longer be used to monitor the stream's closedness`);\n\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n\n stream._writer = undefined;\n writer._ownerWritableStream = undefined!;\n}\n\nfunction WritableStreamDefaultWriterWrite(writer: WritableStreamDefaultWriter, chunk: W): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const controller = stream._writableStreamController;\n\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable');\n\n const promise = WritableStreamAddWriteRequest(stream);\n\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n\n return promise;\n}\n\nconst closeSentinel: unique symbol = {} as any;\n\ntype QueueRecord = W | typeof closeSentinel;\n\n/**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\nexport class WritableStreamDefaultController {\n /** @internal */\n _controlledWritableStream!: WritableStream;\n /** @internal */\n _queue!: SimpleQueue>>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _abortReason: any;\n /** @internal */\n _abortController: AbortController | undefined;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _writeAlgorithm!: (chunk: W) => Promise;\n /** @internal */\n _closeAlgorithm!: () => Promise;\n /** @internal */\n _abortAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason(): any {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('abortReason');\n }\n return this._abortReason;\n }\n\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal(): AbortSignal {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e: any = undefined): void {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n\n WritableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [AbortSteps](reason: any): Promise {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations implementing interface required by the WritableStream.\n\nfunction IsWritableStreamDefaultController(x: any): x is WritableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultController;\n}\n\nfunction SetUpWritableStreamDefaultController(stream: WritableStream,\n controller: WritableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(IsWritableStream(stream));\n assert(stream._writableStreamController === undefined);\n\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(\n startPromise,\n () => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n r => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n }\n );\n}\n\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream: WritableStream,\n underlyingSink: ValidatedUnderlyingSink,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let writeAlgorithm: (chunk: W) => Promise;\n let closeAlgorithm: () => Promise;\n let abortAlgorithm: (reason: any) => Promise;\n\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write!(chunk, controller);\n } else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close!();\n } else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort!(reason);\n } else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpWritableStreamDefaultController(\n stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\nfunction WritableStreamDefaultControllerClearAlgorithms(controller: WritableStreamDefaultController) {\n controller._writeAlgorithm = undefined!;\n controller._closeAlgorithm = undefined!;\n controller._abortAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\nfunction WritableStreamDefaultControllerClose(controller: WritableStreamDefaultController) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\nfunction WritableStreamDefaultControllerGetChunkSize(controller: WritableStreamDefaultController,\n chunk: W): number {\n try {\n return controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n}\n\nfunction WritableStreamDefaultControllerGetDesiredSize(controller: WritableStreamDefaultController): number {\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nfunction WritableStreamDefaultControllerWrite(controller: WritableStreamDefaultController,\n chunk: W,\n chunkSize: number) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\n// Abstract operations for the WritableStreamDefaultController.\n\nfunction WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n if (!controller._started) {\n return;\n }\n\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n\n const state = stream._state;\n assert(state !== 'closed' && state !== 'errored');\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n\n if (controller._queue.length === 0) {\n return;\n }\n\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n } else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n}\n\nfunction WritableStreamDefaultControllerErrorIfNeeded(controller: WritableStreamDefaultController, error: any) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n}\n\nfunction WritableStreamDefaultControllerProcessClose(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkCloseRequestInFlight(stream);\n\n DequeueValue(controller);\n assert(controller._queue.length === 0);\n\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(\n sinkClosePromise,\n () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n },\n reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerProcessWrite(controller: WritableStreamDefaultController, chunk: W) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(\n sinkWritePromise,\n () => {\n WritableStreamFinishInFlightWrite(stream);\n\n const state = stream._state;\n assert(state === 'writable' || state === 'erroring');\n\n DequeueValue(controller);\n\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerGetBackpressure(controller: WritableStreamDefaultController): boolean {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n}\n\n// A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultControllerError(controller: WritableStreamDefaultController, error: any) {\n const stream = controller._controlledWritableStream;\n\n assert(stream._state === 'writable');\n\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n}\n\n// Helper functions for the WritableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n}\n\n// Helper functions for the WritableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n}\n\n\n// Helper functions for the WritableStreamDefaultWriter.\n\nfunction defaultWriterBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n}\n\nfunction defaultWriterLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n}\n\nfunction defaultWriterClosedPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n}\n\nfunction defaultWriterClosedPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n}\n\nfunction defaultWriterClosedPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n}\n\nfunction defaultWriterClosedPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._closedPromise_resolve === undefined);\n assert(writer._closedPromise_reject === undefined);\n assert(writer._closedPromiseState !== 'pending');\n\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n}\n\nfunction defaultWriterReadyPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n}\n\nfunction defaultWriterReadyPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n}\n\nfunction defaultWriterReadyPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n}\n\nfunction defaultWriterReadyPromiseReset(writer: WritableStreamDefaultWriter) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitialize(writer);\n}\n\nfunction defaultWriterReadyPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n}\n","/// \n\nfunction getGlobals(): typeof globalThis | undefined {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n } else if (typeof self !== 'undefined') {\n return self;\n } else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n}\n\nexport const globals = getGlobals();\n","/// \nimport { globals } from '../globals';\nimport { setFunctionName } from '../lib/helpers/miscellaneous';\n\ninterface DOMException extends Error {\n name: string;\n message: string;\n}\n\ntype DOMExceptionConstructor = new (message?: string, name?: string) => DOMException;\n\nfunction isDOMExceptionConstructor(ctor: unknown): ctor is DOMExceptionConstructor {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if ((ctor as DOMExceptionConstructor).name !== 'DOMException') {\n return false;\n }\n try {\n new (ctor as DOMExceptionConstructor)();\n return true;\n } catch {\n return false;\n }\n}\n\n/**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\nfunction getFromGlobal(): DOMExceptionConstructor | undefined {\n const ctor = globals?.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n}\n\n/**\n * Support:\n * - All platforms\n */\nfunction createPolyfill(): DOMExceptionConstructor {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(this: DOMException, message?: string, name?: string) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n } as any;\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-redeclare\nconst DOMException: DOMExceptionConstructor = getFromGlobal() || createPolyfill();\n\nexport { DOMException };\n","import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';\nimport { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireWritableStreamDefaultWriter,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamCloseQueuedOrInFlight,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite\n} from '../writable-stream';\nimport assert from '../../stub/assert';\nimport {\n newPromise,\n PerformPromiseThen,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponFulfillment,\n uponPromise,\n uponRejection\n} from '../helpers/webidl';\nimport { noop } from '../../utils';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\nimport { DOMException } from '../../stub/dom-exception';\n\nexport function ReadableStreamPipeTo(source: ReadableStream,\n dest: WritableStream,\n preventClose: boolean,\n preventAbort: boolean,\n preventCancel: boolean,\n signal: AbortSignal | undefined): Promise {\n assert(IsReadableStream(source));\n assert(IsWritableStream(dest));\n assert(typeof preventClose === 'boolean');\n assert(typeof preventAbort === 'boolean');\n assert(typeof preventCancel === 'boolean');\n assert(signal === undefined || isAbortSignal(signal));\n assert(!IsReadableStreamLocked(source));\n assert(!IsWritableStreamLocked(dest));\n\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n\n source._disturbed = true;\n\n let shuttingDown = false;\n\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n\n return newPromise((resolve, reject) => {\n let abortAlgorithm: () => void;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions: Array<() => Promise> = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n\n signal.addEventListener('abort', abortAlgorithm);\n }\n\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done: boolean) {\n if (done) {\n resolveLoop();\n } else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n\n next(false);\n });\n }\n\n function pipeStep(): Promise {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(\n reader,\n {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n }\n );\n });\n });\n }\n\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n } else {\n shutdown();\n }\n return null;\n });\n\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n } else {\n shutdown(true, destClosed);\n }\n }\n\n setPromiseIsHandledToTrue(pipeLoop());\n\n function waitForWritesToFinish(): Promise {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(\n currentWrite,\n () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined\n );\n }\n\n function isOrBecomesErrored(stream: ReadableStream | WritableStream,\n promise: Promise,\n action: (reason: any) => null) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n } else {\n uponRejection(promise, action);\n }\n }\n\n function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise, action: () => null) {\n if (stream._state === 'closed') {\n action();\n } else {\n uponFulfillment(promise, action);\n }\n }\n\n function shutdownWithAction(action: () => Promise, originalIsError?: boolean, originalError?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n } else {\n doTheRest();\n }\n\n function doTheRest(): null {\n uponPromise(\n action(),\n () => finalize(originalIsError, originalError),\n newError => finalize(true, newError)\n );\n return null;\n }\n }\n\n function shutdown(isError?: boolean, error?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n } else {\n finalize(isError, error);\n }\n }\n\n function finalize(isError?: boolean, error?: any): null {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n } else {\n resolve(undefined);\n }\n\n return null;\n }\n });\n}\n","import type { QueuingStrategySizeCallback } from '../queuing-strategy';\nimport assert from '../../stub/assert';\nimport { DequeueValue, EnqueueValueWithSize, type QueuePair, ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n type ReadRequest\n} from './default-reader';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsReadableStreamLocked, ReadableStream, ReadableStreamClose, ReadableStreamError } from '../readable-stream';\nimport type { ValidatedUnderlyingSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\n\n/**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableStreamDefaultController {\n /** @internal */\n _controlledReadableStream!: ReadableStream;\n /** @internal */\n _queue!: SimpleQueue>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('close');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n\n ReadableStreamDefaultControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the controlled readable stream.\n */\n enqueue(chunk: R): void;\n enqueue(chunk: R = undefined!): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n ReadableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest): void {\n const stream = this._controlledReadableStream;\n\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n } else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n\n readRequest._chunkSteps(chunk);\n } else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n // Do nothing.\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\nsetFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableStreamDefaultController.\n\nfunction IsReadableStreamDefaultController(x: any): x is ReadableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultController;\n}\n\nfunction ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController): void {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController): boolean {\n const stream = controller._controlledReadableStream;\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\n// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n\nexport function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n controller._closeRequested = true;\n\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n}\n\nexport function ReadableStreamDefaultControllerEnqueue(\n controller: ReadableStreamDefaultController,\n chunk: R\n): void {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n } else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController, e: any) {\n const stream = controller._controlledReadableStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ResetQueue(controller);\n\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableStreamDefaultControllerGetDesiredSize(\n controller: ReadableStreamDefaultController\n): number | null {\n const state = controller._controlledReadableStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\n// This is used in the implementation of TransformStream.\nexport function ReadableStreamDefaultControllerHasBackpressure(\n controller: ReadableStreamDefaultController\n): boolean {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n\n return true;\n}\n\nexport function ReadableStreamDefaultControllerCanCloseOrEnqueue(\n controller: ReadableStreamDefaultController\n): boolean {\n const state = controller._controlledReadableStream._state;\n\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n\n return false;\n}\n\nexport function SetUpReadableStreamDefaultController(stream: ReadableStream,\n controller: ReadableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(stream._readableStreamController === undefined);\n\n controller._controlledReadableStream = stream;\n\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n stream: ReadableStream,\n underlyingSource: ValidatedUnderlyingSource,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback\n) {\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// Helper functions for the ReadableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n}\n","import {\n CreateReadableByteStream,\n CreateReadableStream,\n type DefaultReadableStream,\n IsReadableStream,\n type ReadableByteStream,\n ReadableStream,\n ReadableStreamCancel,\n type ReadableStreamReader\n} from '../readable-stream';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadRequest\n} from './default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReaderRead,\n type ReadIntoRequest\n} from './byob-reader';\nimport assert from '../../stub/assert';\nimport { newPromise, promiseResolvedWith, queueMicrotask, uponRejection } from '../helpers/webidl';\nimport {\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError\n} from './default-controller';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamControllerClose,\n ReadableByteStreamControllerEnqueue,\n ReadableByteStreamControllerError,\n ReadableByteStreamControllerGetBYOBRequest,\n ReadableByteStreamControllerRespond,\n ReadableByteStreamControllerRespondWithNewView\n} from './byte-stream-controller';\nimport { CreateArrayFromList } from '../abstract-ops/ecmascript';\nimport { CloneAsUint8Array } from '../abstract-ops/miscellaneous';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function ReadableStreamTee(stream: ReadableStream,\n cloneForBranch2: boolean): [ReadableStream, ReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream as unknown as ReadableByteStream) as\n unknown as [ReadableStream, ReadableStream];\n }\n return ReadableStreamDefaultTee(stream, cloneForBranch2);\n}\n\nexport function ReadableStreamDefaultTee(\n stream: ReadableStream,\n cloneForBranch2: boolean\n): [DefaultReadableStream, DefaultReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n\n const reader = AcquireReadableStreamDefaultReader(stream);\n\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: DefaultReadableStream;\n let branch2: DefaultReadableStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function pullAlgorithm(): Promise {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm() {\n // do nothing\n }\n\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n\n uponRejection(reader._closedPromise, (r: any) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n\n return [branch1, branch2];\n}\n\nexport function ReadableByteStreamTee(stream: ReadableByteStream): [ReadableByteStream, ReadableByteStream] {\n assert(IsReadableStream(stream));\n assert(IsReadableByteStreamController(stream._readableStreamController));\n\n let reader: ReadableStreamReader> = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: ReadableByteStream;\n let branch2: ReadableByteStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function forwardReaderError(thisReader: ReadableStreamReader>) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n assert(reader._readIntoRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n\n const readRequest: ReadRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n\n function pullWithBYOBReader(view: NonShared, forBranch2: boolean) {\n if (IsReadableStreamDefaultReader>(reader)) {\n assert(reader._readRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n\n const readIntoRequest: ReadIntoRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n } else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n\n if (chunk !== undefined) {\n assert(chunk.byteLength === 0);\n\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n\n function pull1Algorithm(): Promise {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, false);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function pull2Algorithm(): Promise {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, true);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm(): void {\n return;\n }\n\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n\n forwardReaderError(reader);\n\n return [branch1, branch2];\n}\n","import { typeIsObject } from '../helpers/miscellaneous';\nimport type { ReadableStreamDefaultReadResult } from './default-reader';\n\n/**\n * A common interface for a `ReadadableStream` implementation.\n *\n * @public\n */\nexport interface ReadableStreamLike {\n readonly locked: boolean;\n\n getReader(): ReadableStreamDefaultReaderLike;\n}\n\n/**\n * A common interface for a `ReadableStreamDefaultReader` implementation.\n *\n * @public\n */\nexport interface ReadableStreamDefaultReaderLike {\n readonly closed: Promise;\n\n cancel(reason?: any): Promise;\n\n read(): Promise>;\n\n releaseLock(): void;\n}\n\nexport function isReadableStreamLike(stream: unknown): stream is ReadableStreamLike {\n return typeIsObject(stream) && typeof (stream as ReadableStreamLike).getReader !== 'undefined';\n}\n","import { CreateReadableStream, type DefaultReadableStream } from '../readable-stream';\nimport {\n isReadableStreamLike,\n type ReadableStreamDefaultReaderLike,\n type ReadableStreamLike\n} from './readable-stream-like';\nimport { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue } from './default-controller';\nimport { GetIterator, GetMethod, IteratorComplete, IteratorNext, IteratorValue } from '../abstract-ops/ecmascript';\nimport { promiseRejectedWith, promiseResolvedWith, reflectCall, transformPromiseWith } from '../helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport { noop } from '../../utils';\n\nexport function ReadableStreamFrom(\n source: Iterable | AsyncIterable | ReadableStreamLike\n): DefaultReadableStream {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n}\n\nexport function ReadableStreamFromIterable(asyncIterable: Iterable | AsyncIterable): DefaultReadableStream {\n let stream: DefaultReadableStream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n const iterator = iteratorRecord.iterator;\n let returnMethod: (typeof iterator)['return'] | undefined;\n try {\n returnMethod = GetMethod(iterator, 'return');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult: IteratorResult | Promise>;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n\nexport function ReadableStreamFromDefaultReader(\n reader: ReadableStreamDefaultReaderLike\n): DefaultReadableStream {\n let stream: DefaultReadableStream;\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let readPromise;\n try {\n readPromise = reader.read();\n } catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n } catch (e) {\n return promiseRejectedWith(e);\n }\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n","import { assertDictionary, assertFunction, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamController,\n UnderlyingByteSource,\n UnderlyingDefaultOrByteSource,\n UnderlyingDefaultOrByteSourcePullCallback,\n UnderlyingDefaultOrByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n ValidatedUnderlyingDefaultOrByteSource\n} from '../readable-stream/underlying-source';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\n\nexport function convertUnderlyingDefaultOrByteSource(\n source: UnderlyingSource | UnderlyingByteSource | null,\n context: string\n): ValidatedUnderlyingDefaultOrByteSource {\n assertDictionary(source, context);\n const original = source as (UnderlyingDefaultOrByteSource | null);\n const autoAllocateChunkSize = original?.autoAllocateChunkSize;\n const cancel = original?.cancel;\n const pull = original?.pull;\n const start = original?.start;\n const type = original?.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(\n autoAllocateChunkSize,\n `${context} has member 'autoAllocateChunkSize' that`\n ),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original!, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original!, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n}\n\nfunction convertUnderlyingSourceCancelCallback(\n fn: UnderlyingSourceCancelCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSourcePullCallback(\n fn: UnderlyingDefaultOrByteSourcePullCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (controller: ReadableStreamController) => Promise {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSourceStartCallback(\n fn: UnderlyingDefaultOrByteSourceStartCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): UnderlyingDefaultOrByteSourceStartCallback {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertReadableStreamType(type: string, context: string): 'bytes' {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n}\n","import { assertDictionary } from './basic';\nimport type {\n ReadableStreamIteratorOptions,\n ValidatedReadableStreamIteratorOptions\n} from '../readable-stream/iterator-options';\n\nexport function convertIteratorOptions(options: ReadableStreamIteratorOptions | null | undefined,\n context: string): ValidatedReadableStreamIteratorOptions {\n assertDictionary(options, context);\n const preventCancel = options?.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n}\n","import { assertDictionary } from './basic';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from '../readable-stream/pipe-options';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\n\nexport function convertPipeOptions(options: StreamPipeOptions | null | undefined,\n context: string): ValidatedStreamPipeOptions {\n assertDictionary(options, context);\n const preventAbort = options?.preventAbort;\n const preventCancel = options?.preventCancel;\n const preventClose = options?.preventClose;\n const signal = options?.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n}\n\nfunction assertAbortSignal(signal: unknown, context: string): asserts signal is AbortSignal {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n}\n","import { assertDictionary, assertRequiredField } from './basic';\nimport { ReadableStream } from '../readable-stream';\nimport { WritableStream } from '../writable-stream';\nimport { assertReadableStream } from './readable-stream';\nimport { assertWritableStream } from './writable-stream';\n\nexport function convertReadableWritablePair(\n pair: { readable: RS; writable: WS } | null | undefined,\n context: string\n): { readable: RS; writable: WS } {\n assertDictionary(pair, context);\n\n const readable = pair?.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n\n const writable = pair?.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n\n return { readable, writable };\n}\n","import assert from '../stub/assert';\nimport {\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith\n} from './helpers/webidl';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { AcquireReadableStreamAsyncIterator, type ReadableStreamAsyncIterator } from './readable-stream/async-iterator';\nimport { defaultReaderClosedPromiseReject, defaultReaderClosedPromiseResolve } from './readable-stream/generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderErrorReadRequests,\n type ReadableStreamDefaultReadResult\n} from './readable-stream/default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBReaderErrorReadIntoRequests,\n type ReadableStreamBYOBReadResult\n} from './readable-stream/byob-reader';\nimport { ReadableStreamPipeTo } from './readable-stream/pipe';\nimport { ReadableStreamTee } from './readable-stream/tee';\nimport { ReadableStreamFrom } from './readable-stream/from';\nimport { IsWritableStream, IsWritableStreamLocked, WritableStream } from './writable-stream';\nimport { SimpleQueue } from './simple-queue';\nimport {\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n SetUpReadableByteStreamController,\n SetUpReadableByteStreamControllerFromUnderlyingSource\n} from './readable-stream/byte-stream-controller';\nimport {\n ReadableStreamDefaultController,\n SetUpReadableStreamDefaultController,\n SetUpReadableStreamDefaultControllerFromUnderlyingSource\n} from './readable-stream/default-controller';\nimport type {\n UnderlyingByteSource,\n UnderlyingByteSourcePullCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceStartCallback\n} from './readable-stream/underlying-source';\nimport { noop } from '../utils';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { CreateArrayFromList, SymbolAsyncIterator } from './abstract-ops/ecmascript';\nimport { CancelSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertUnderlyingDefaultOrByteSource } from './validators/underlying-source';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions\n} from './readable-stream/reader-options';\nimport { convertReaderOptions } from './validators/reader-options';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from './readable-stream/pipe-options';\nimport type { ReadableStreamIteratorOptions } from './readable-stream/iterator-options';\nimport { convertIteratorOptions } from './validators/iterator-options';\nimport { convertPipeOptions } from './validators/pipe-options';\nimport type { ReadableWritablePair } from './readable-stream/readable-writable-pair';\nimport { convertReadableWritablePair } from './validators/readable-writable-pair';\nimport type { ReadableStreamDefaultReaderLike, ReadableStreamLike } from './readable-stream/readable-stream-like';\nimport type { NonShared } from './helpers/array-buffer-view';\n\nexport type DefaultReadableStream = ReadableStream & {\n _readableStreamController: ReadableStreamDefaultController\n};\n\nexport type ReadableByteStream = ReadableStream> & {\n _readableStreamController: ReadableByteStreamController\n};\n\ntype ReadableStreamState = 'readable' | 'closed' | 'errored';\n\n/**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\nexport class ReadableStream implements AsyncIterable {\n /** @internal */\n _state!: ReadableStreamState;\n /** @internal */\n _reader: ReadableStreamReader | undefined;\n /** @internal */\n _storedError: any;\n /** @internal */\n _disturbed!: boolean;\n /** @internal */\n _readableStreamController!: ReadableStreamDefaultController | ReadableByteStreamController;\n\n constructor(underlyingSource: UnderlyingByteSource, strategy?: { highWaterMark?: number; size?: undefined });\n constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSource: UnderlyingSource | UnderlyingByteSource | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n } else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n\n InitializeReadableStream(this);\n\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(\n this as unknown as ReadableByteStream,\n underlyingSource,\n highWaterMark\n );\n } else {\n assert(underlyingSource.type === undefined);\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n this,\n underlyingSource,\n highWaterMark,\n sizeAlgorithm\n );\n }\n }\n\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked(): boolean {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsReadableStreamLocked(this);\n }\n\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('cancel'));\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n\n return ReadableStreamCancel(this, reason);\n }\n\n /**\n * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader.\n *\n * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams,\n * i.e. streams which were constructed specifically with the ability to handle \"bring your own buffer\" reading.\n * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its\n * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise\n * control over allocation.\n */\n getReader({ mode }: { mode: 'byob' }): ReadableStreamBYOBReader;\n /**\n * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader.\n * While the stream is locked, no other reader can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to consume a stream\n * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours\n * or cancel the stream, which would interfere with your abstraction.\n */\n getReader(): ReadableStreamDefaultReader;\n getReader(\n rawOptions: ReadableStreamGetReaderOptions | null | undefined = undefined\n ): ReadableStreamDefaultReader | ReadableStreamBYOBReader {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('getReader');\n }\n\n const options = convertReaderOptions(rawOptions, 'First parameter');\n\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n\n assert(options.mode === 'byob');\n return AcquireReadableStreamBYOBReader(this as unknown as ReadableByteStream);\n }\n\n /**\n * Provides a convenient, chainable way of piping this readable stream through a transform stream\n * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream\n * into the writable side of the supplied pair, and returns the readable side for further use.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeThrough(\n transform: { readable: RS; writable: WritableStream },\n options?: StreamPipeOptions\n ): RS;\n pipeThrough(\n rawTransform: { readable: RS; writable: WritableStream } | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}\n ): RS {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n\n const promise = ReadableStreamPipeTo(\n this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n\n setPromiseIsHandledToTrue(promise);\n\n return transform.readable;\n }\n\n /**\n * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under\n * various error conditions can be customized with a number of passed options. It returns a promise that fulfills\n * when the piping process completes successfully, or rejects if any errors were encountered.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise;\n pipeTo(destination: WritableStream | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('pipeTo'));\n }\n\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(\n new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)\n );\n }\n\n let options: ValidatedStreamPipeOptions;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')\n );\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')\n );\n }\n\n return ReadableStreamPipeTo(\n this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n }\n\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee(): [ReadableStream, ReadableStream] {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('tee');\n }\n\n const branches = ReadableStreamTee(this, false);\n return CreateArrayFromList(branches);\n }\n\n /**\n * Asynchronously iterates over the chunks in the stream's internal queue.\n *\n * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader.\n * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method\n * is called, e.g. by breaking out of the loop.\n *\n * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also\n * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing\n * `true` for the `preventCancel` option.\n */\n values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n values(rawOptions: ReadableStreamIteratorOptions | null | undefined = undefined): ReadableStreamAsyncIterator {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('values');\n }\n\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n\n /**\n * {@inheritDoc ReadableStream.values}\n */\n [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n\n [SymbolAsyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator {\n // Stub implementation, overridden below\n return this.values(options);\n }\n\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream {\n return ReadableStreamFrom(asyncIterable);\n }\n}\n\nObject.defineProperties(ReadableStream, {\n from: { enumerable: true }\n});\nObject.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(ReadableStream.from, 'from');\nsetFunctionName(ReadableStream.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStream.prototype.getReader, 'getReader');\nsetFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\nsetFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\nsetFunctionName(ReadableStream.prototype.tee, 'tee');\nsetFunctionName(ReadableStream.prototype.values, 'values');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n}\nObject.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n});\n\nexport type {\n ReadableStreamAsyncIterator,\n ReadableStreamDefaultReadResult,\n ReadableStreamBYOBReadResult,\n ReadableStreamBYOBReaderReadOptions,\n UnderlyingByteSource,\n UnderlyingSource,\n UnderlyingSourceStartCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceCancelCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingByteSourcePullCallback,\n StreamPipeOptions,\n ReadableWritablePair,\n ReadableStreamIteratorOptions,\n ReadableStreamLike,\n ReadableStreamDefaultReaderLike\n};\n\n// Abstract operations for the ReadableStream.\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1\n): DefaultReadableStream {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: DefaultReadableStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n\n return stream;\n}\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableByteStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise\n): ReadableByteStream {\n const stream: ReadableByteStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n\n return stream;\n}\n\nfunction InitializeReadableStream(stream: ReadableStream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n}\n\nexport function IsReadableStream(x: unknown): x is ReadableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStream;\n}\n\nexport function IsReadableStreamDisturbed(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n return stream._disturbed;\n}\n\nexport function IsReadableStreamLocked(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n if (stream._reader === undefined) {\n return false;\n }\n\n return true;\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamCancel(stream: ReadableStream, reason: any): Promise {\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n ReadableStreamClose(stream);\n\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n}\n\nexport function ReadableStreamClose(stream: ReadableStream): void {\n assert(stream._state === 'readable');\n\n stream._state = 'closed';\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseResolve(reader);\n\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n}\n\nexport function ReadableStreamError(stream: ReadableStream, e: any): void {\n assert(IsReadableStream(stream));\n assert(stream._state === 'readable');\n\n stream._state = 'errored';\n stream._storedError = e;\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseReject(reader, e);\n\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n } else {\n assert(IsReadableStreamBYOBReader(reader));\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n}\n\n// Readers\n\nexport type ReadableStreamReader = ReadableStreamDefaultReader | ReadableStreamBYOBReader;\n\nexport {\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader\n};\n\n// Controllers\n\nexport {\n ReadableStreamDefaultController,\n ReadableStreamBYOBRequest,\n ReadableByteStreamController\n};\n\n// Helper functions for the ReadableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n}\n","import type { QueuingStrategyInit } from '../queuing-strategy';\nimport { assertDictionary, assertRequiredField, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategyInit(init: QueuingStrategyInit | null | undefined,\n context: string): QueuingStrategyInit {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst byteLengthSizeFunction = (chunk: ArrayBufferView): number => {\n return chunk.byteLength;\n};\nsetFunctionName(byteLengthSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\nexport default class ByteLengthQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _byteLengthQueuingStrategyHighWaterMark: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size(): (chunk: ArrayBufferView) => number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n}\n\nObject.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the ByteLengthQueuingStrategy.\n\nfunction byteLengthBrandCheckException(name: string): TypeError {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n}\n\nexport function IsByteLengthQueuingStrategy(x: any): x is ByteLengthQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof ByteLengthQueuingStrategy;\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst countSizeFunction = (): 1 => {\n return 1;\n};\nsetFunctionName(countSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\nexport default class CountQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _countQueuingStrategyHighWaterMark!: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size(): (chunk: any) => 1 {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n}\n\nObject.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the CountQueuingStrategy.\n\nfunction countBrandCheckException(name: string): TypeError {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n}\n\nexport function IsCountQueuingStrategy(x: any): x is CountQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof CountQueuingStrategy;\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from '../transform-stream/transformer';\nimport { TransformStreamDefaultController } from '../transform-stream';\n\nexport function convertTransformer(original: Transformer | null,\n context: string): ValidatedTransformer {\n assertDictionary(original, context);\n const cancel = original?.cancel;\n const flush = original?.flush;\n const readableType = original?.readableType;\n const start = original?.start;\n const transform = original?.transform;\n const writableType = original?.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original!, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original!, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original!, `${context} has member 'transform' that`),\n writableType\n };\n}\n\nfunction convertTransformerFlushCallback(\n fn: TransformerFlushCallback,\n original: Transformer,\n context: string\n): (controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertTransformerStartCallback(\n fn: TransformerStartCallback,\n original: Transformer,\n context: string\n): TransformerStartCallback {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertTransformerTransformCallback(\n fn: TransformerTransformCallback,\n original: Transformer,\n context: string\n): (chunk: I, controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: I, controller: TransformStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n\nfunction convertTransformerCancelCallback(\n fn: TransformerCancelCallback,\n original: Transformer,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith,\n uponPromise\n} from './helpers/webidl';\nimport { CreateReadableStream, type DefaultReadableStream, ReadableStream } from './readable-stream';\nimport {\n ReadableStreamDefaultControllerCanCloseOrEnqueue,\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError,\n ReadableStreamDefaultControllerGetDesiredSize,\n ReadableStreamDefaultControllerHasBackpressure\n} from './readable-stream/default-controller';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { CreateWritableStream, WritableStream, WritableStreamDefaultControllerErrorIfNeeded } from './writable-stream';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from './transform-stream/transformer';\nimport { convertTransformer } from './validators/transformer';\n\n// Class TransformStream\n\n/**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\nexport class TransformStream {\n /** @internal */\n _writable!: WritableStream;\n /** @internal */\n _readable!: DefaultReadableStream;\n /** @internal */\n _backpressure!: boolean;\n /** @internal */\n _backpressureChangePromise!: Promise;\n /** @internal */\n _backpressureChangePromise_resolve!: () => void;\n /** @internal */\n _transformStreamController!: TransformStreamDefaultController;\n\n constructor(\n transformer?: Transformer,\n writableStrategy?: QueuingStrategy,\n readableStrategy?: QueuingStrategy\n );\n constructor(rawTransformer: Transformer | null | undefined = {},\n rawWritableStrategy: QueuingStrategy | null | undefined = {},\n rawReadableStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(\n this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm\n );\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n } else {\n startPromise_resolve(undefined);\n }\n }\n\n /**\n * The readable side of the transform stream.\n */\n get readable(): ReadableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n\n return this._readable;\n }\n\n /**\n * The writable side of the transform stream.\n */\n get writable(): WritableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n\n return this._writable;\n }\n}\n\nObject.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n}\n\nexport type {\n Transformer,\n TransformerCancelCallback,\n TransformerStartCallback,\n TransformerFlushCallback,\n TransformerTransformCallback\n};\n\n// Transform Stream Abstract Operations\n\nexport function CreateTransformStream(startAlgorithm: () => void | PromiseLike,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n writableHighWaterMark = 1,\n writableSizeAlgorithm: QueuingStrategySizeCallback = () => 1,\n readableHighWaterMark = 0,\n readableSizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(writableHighWaterMark));\n assert(IsNonNegativeNumber(readableHighWaterMark));\n\n const stream: TransformStream = Object.create(TransformStream.prototype);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n\n const startResult = startAlgorithm();\n startPromise_resolve(startResult);\n return stream;\n}\n\nfunction InitializeTransformStream(stream: TransformStream,\n startPromise: Promise,\n writableHighWaterMark: number,\n writableSizeAlgorithm: QueuingStrategySizeCallback,\n readableHighWaterMark: number,\n readableSizeAlgorithm: QueuingStrategySizeCallback) {\n function startAlgorithm(): Promise {\n return startPromise;\n }\n\n function writeAlgorithm(chunk: I): Promise {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n\n function abortAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n\n function closeAlgorithm(): Promise {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm,\n writableHighWaterMark, writableSizeAlgorithm);\n\n function pullAlgorithm(): Promise {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n\n function cancelAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined!;\n stream._backpressureChangePromise = undefined!;\n stream._backpressureChangePromise_resolve = undefined!;\n TransformStreamSetBackpressure(stream, true);\n\n stream._transformStreamController = undefined!;\n}\n\nfunction IsTransformStream(x: unknown): x is TransformStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n\n return x instanceof TransformStream;\n}\n\n// This is a no-op if both sides are already errored.\nfunction TransformStreamError(stream: TransformStream, e: any) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n}\n\nfunction TransformStreamErrorWritableAndUnblockWrite(stream: TransformStream, e: any) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n}\n\nfunction TransformStreamUnblockWrite(stream: TransformStream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure()\n // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time\n // _backpressure is set.\n TransformStreamSetBackpressure(stream, false);\n }\n}\n\nfunction TransformStreamSetBackpressure(stream: TransformStream, backpressure: boolean) {\n // Passes also when called during construction.\n assert(stream._backpressure !== backpressure);\n\n if (stream._backpressureChangePromise !== undefined) {\n stream._backpressureChangePromise_resolve();\n }\n\n stream._backpressureChangePromise = newPromise(resolve => {\n stream._backpressureChangePromise_resolve = resolve;\n });\n\n stream._backpressure = backpressure;\n}\n\n// Class TransformStreamDefaultController\n\n/**\n * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}.\n *\n * @public\n */\nexport class TransformStreamDefaultController {\n /** @internal */\n _controlledTransformStream: TransformStream;\n /** @internal */\n _finishPromise: Promise | undefined;\n /** @internal */\n _finishPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _finishPromise_reject?: (reason: any) => void;\n /** @internal */\n _transformAlgorithm: (chunk: any) => Promise;\n /** @internal */\n _flushAlgorithm: () => Promise;\n /** @internal */\n _cancelAlgorithm: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full.\n */\n get desiredSize(): number | null {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n const readableController = this._controlledTransformStream._readable._readableStreamController;\n return ReadableStreamDefaultControllerGetDesiredSize(readableController);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the readable side of the controlled transform stream.\n */\n enqueue(chunk: O): void;\n enqueue(chunk: O = undefined!): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n TransformStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors both the readable side and the writable side of the controlled transform stream, making all future\n * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.\n */\n error(reason: any = undefined): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n TransformStreamDefaultControllerError(this, reason);\n }\n\n /**\n * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate(): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n\n TransformStreamDefaultControllerTerminate(this);\n }\n}\n\nObject.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(TransformStreamDefaultController.prototype.error, 'error');\nsetFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n}\n\n// Transform Stream Default Controller Abstract Operations\n\nfunction IsTransformStreamDefaultController(x: any): x is TransformStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n\n return x instanceof TransformStreamDefaultController;\n}\n\nfunction SetUpTransformStreamDefaultController(stream: TransformStream,\n controller: TransformStreamDefaultController,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise) {\n assert(IsTransformStream(stream));\n assert(stream._transformStreamController === undefined);\n\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nfunction SetUpTransformStreamDefaultControllerFromTransformer(stream: TransformStream,\n transformer: ValidatedTransformer) {\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n let transformAlgorithm: (chunk: I) => Promise;\n let flushAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform!(chunk, controller);\n } else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk as unknown as O);\n return promiseResolvedWith(undefined);\n } catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush!(controller);\n } else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n}\n\nfunction TransformStreamDefaultControllerClearAlgorithms(controller: TransformStreamDefaultController) {\n controller._transformAlgorithm = undefined!;\n controller._flushAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\nfunction TransformStreamDefaultControllerEnqueue(controller: TransformStreamDefaultController, chunk: O) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n\n // We throttle transform invocations based on the backpressure of the ReadableStream, but we still\n // accept TransformStreamDefaultControllerEnqueue() calls.\n\n try {\n ReadableStreamDefaultControllerEnqueue(readableController, chunk);\n } catch (e) {\n // This happens when readableStrategy.size() throws.\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n\n throw stream._readable._storedError;\n }\n\n const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);\n if (backpressure !== stream._backpressure) {\n assert(backpressure);\n TransformStreamSetBackpressure(stream, true);\n }\n}\n\nfunction TransformStreamDefaultControllerError(controller: TransformStreamDefaultController, e: any) {\n TransformStreamError(controller._controlledTransformStream, e);\n}\n\nfunction TransformStreamDefaultControllerPerformTransform(controller: TransformStreamDefaultController,\n chunk: I) {\n const transformPromise = controller._transformAlgorithm(chunk);\n return transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n}\n\nfunction TransformStreamDefaultControllerTerminate(controller: TransformStreamDefaultController) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n\n ReadableStreamDefaultControllerClose(readableController);\n\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n}\n\n// TransformStreamDefaultSink Algorithms\n\nfunction TransformStreamDefaultSinkWriteAlgorithm(stream: TransformStream, chunk: I): Promise {\n assert(stream._writable._state === 'writable');\n\n const controller = stream._transformStreamController;\n\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n assert(backpressureChangePromise !== undefined);\n return transformPromiseWith(backpressureChangePromise, () => {\n const writable = stream._writable;\n const state = writable._state;\n if (state === 'erroring') {\n throw writable._storedError;\n }\n assert(state === 'writable');\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n });\n }\n\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n}\n\nfunction TransformStreamDefaultSinkAbortAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally,\n // we don't run the _cancelAlgorithm again.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerError(readable._readableStreamController, reason);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\nfunction TransformStreamDefaultSinkCloseAlgorithm(stream: TransformStream): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// TransformStreamDefaultSource Algorithms\n\nfunction TransformStreamDefaultSourcePullAlgorithm(stream: TransformStream): Promise {\n // Invariant. Enforced by the promises returned by start() and pull().\n assert(stream._backpressure);\n\n assert(stream._backpressureChangePromise !== undefined);\n\n TransformStreamSetBackpressure(stream, false);\n\n // Prevent the next pull() call until there is backpressure.\n return stream._backpressureChangePromise;\n}\n\nfunction TransformStreamDefaultSourceCancelAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._writable cannot change after construction, so caching it across a call to user code is safe.\n const writable = stream._writable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or\n // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the\n // _flushAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (writable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, writable._storedError);\n } else {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// Helper functions for the TransformStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n}\n\nexport function defaultControllerFinishPromiseResolve(controller: TransformStreamDefaultController) {\n if (controller._finishPromise_resolve === undefined) {\n return;\n }\n\n controller._finishPromise_resolve();\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nexport function defaultControllerFinishPromiseReject(controller: TransformStreamDefaultController, reason: any) {\n if (controller._finishPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(controller._finishPromise!);\n controller._finishPromise_reject(reason);\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\n// Helper functions for the TransformStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStream.prototype.${name} can only be used on a TransformStream`);\n}\n","import {\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n ReadableByteStreamController,\n ReadableStream,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultController,\n ReadableStreamDefaultReader,\n TransformStream,\n TransformStreamDefaultController,\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter\n} from './ponyfill';\nimport { globals } from './globals';\n\n// Export\nexport * from './ponyfill';\n\nconst exports = {\n ReadableStream,\n ReadableStreamDefaultController,\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader,\n\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter,\n\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n\n TransformStream,\n TransformStreamDefaultController\n};\n\n// Add classes to global scope\nif (typeof globals !== 'undefined') {\n for (const prop in exports) {\n if (Object.prototype.hasOwnProperty.call(exports, prop)) {\n Object.defineProperty(globals, prop, {\n value: exports[prop as (keyof typeof exports)],\n writable: true,\n configurable: true\n });\n }\n 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RangeError("options.min must be less than or equal to view's length"));if(void 0===this._ownerReadableStream)return c(W("read from"));let n,a;const i=s(((e,t)=>{n=e,a=t}));return st(this,e,o,{_chunkSteps:e=>n({value:e,done:!1}),_closeSteps:e=>n({value:e,done:!0}),_errorSteps:e=>a(e)}),i}releaseLock(){if(!lt(this))throw ct("releaseLock");void 0!==this._ownerReadableStream&&function(e){E(e);const t=new TypeError("Reader was released");ut(e,t)}(this)}}function lt(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_readIntoRequests")&&e instanceof ReadableStreamBYOBReader)}function st(e,t,r,o){const n=e._ownerReadableStream;n._disturbed=!0,"errored"===n._state?o._errorSteps(n._storedError):Me(n._readableStreamController,t,r,o)}function ut(e,t){const r=e._readIntoRequests;e._readIntoRequests=new g,r.forEach((e=>{e._errorSteps(t)}))}function ct(e){return new TypeError(`ReadableStreamBYOBReader.prototype.${e} can only be used on a ReadableStreamBYOBReader`)}function dt(e,t){const{highWaterMark:r}=e;if(void 0===r)return t;if(ve(r)||r<0)throw new RangeError("Invalid highWaterMark");return r}function ft(e){const{size:t}=e;return t||(()=>1)}function bt(e,t){z(e,t);const r=null==e?void 0:e.highWaterMark,o=null==e?void 0:e.size;return{highWaterMark:void 0===r?void 0:M(r),size:void 0===o?void 0:mt(o,`${t} has member 'size' that`)}}function mt(e,t){return I(e,t),t=>M(e(t))}function ht(e,t,r){return I(e,r),r=>S(e,t,[r])}function _t(e,t,r){return I(e,r),()=>S(e,t,[])}function pt(e,t,r){return I(e,r),r=>y(e,t,[r])}function yt(e,t,r){return I(e,r),(r,o)=>S(e,t,[r,o])}function St(e,t){if(!Rt(e))throw new TypeError(`${t} is not a WritableStream.`)}Object.defineProperties(ReadableStreamBYOBReader.prototype,{cancel:{enumerable:!0},read:{enumerable:!0},releaseLock:{enumerable:!0},closed:{enumerable:!0}}),n(ReadableStreamBYOBReader.prototype.cancel,"cancel"),n(ReadableStreamBYOBReader.prototype.read,"read"),n(ReadableStreamBYOBReader.prototype.releaseLock,"releaseLock"),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(ReadableStreamBYOBReader.prototype,Symbol.toStringTag,{value:"ReadableStreamBYOBReader",configurable:!0});const gt="function"==typeof AbortController;class WritableStream{constructor(e={},t={}){void 0===e?e=null:L(e,"First parameter");const r=bt(t,"Second parameter"),o=function(e,t){z(e,t);const r=null==e?void 0:e.abort,o=null==e?void 0:e.close,n=null==e?void 0:e.start,a=null==e?void 0:e.type,i=null==e?void 0:e.write;return{abort:void 0===r?void 0:ht(r,e,`${t} has member 'abort' that`),close:void 0===o?void 0:_t(o,e,`${t} has member 'close' that`),start:void 0===n?void 0:pt(n,e,`${t} has member 'start' that`),write:void 0===i?void 0:yt(i,e,`${t} has member 'write' that`),type:a}}(e,"First parameter");wt(this);if(void 0!==o.type)throw new RangeError("Invalid type is specified");const n=ft(r);!function(e,t,r,o){const n=Object.create(WritableStreamDefaultController.prototype);let a,i,l,s;a=void 0!==t.start?()=>t.start(n):()=>{};i=void 0!==t.write?e=>t.write(e,n):()=>u(void 0);l=void 0!==t.close?()=>t.close():()=>u(void 0);s=void 0!==t.abort?e=>t.abort(e):()=>u(void 0);Mt(e,n,a,i,l,s,r,o)}(this,o,dt(r,1),n)}get locked(){if(!Rt(this))throw Ut("locked");return Tt(this)}abort(e=void 0){return Rt(this)?Tt(this)?c(new TypeError("Cannot abort a stream that already has a writer")):Ct(this,e):c(Ut("abort"))}close(){return Rt(this)?Tt(this)?c(new TypeError("Cannot close a stream that already has a writer")):Bt(this)?c(new TypeError("Cannot close an already-closing stream")):Pt(this):c(Ut("close"))}getWriter(){if(!Rt(this))throw Ut("getWriter");return vt(this)}}function vt(e){return new WritableStreamDefaultWriter(e)}function wt(e){e._state="writable",e._storedError=void 0,e._writer=void 0,e._writableStreamController=void 0,e._writeRequests=new g,e._inFlightWriteRequest=void 0,e._closeRequest=void 0,e._inFlightCloseRequest=void 0,e._pendingAbortRequest=void 0,e._backpressure=!1}function Rt(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_writableStreamController")&&e instanceof WritableStream)}function Tt(e){return void 0!==e._writer}function Ct(e,t){var r;if("closed"===e._state||"errored"===e._state)return u(void 0);e._writableStreamController._abortReason=t,null===(r=e._writableStreamController._abortController)||void 0===r||r.abort(t);const o=e._state;if("closed"===o||"errored"===o)return u(void 0);if(void 0!==e._pendingAbortRequest)return e._pendingAbortRequest._promise;let n=!1;"erroring"===o&&(n=!0,t=void 0);const a=s(((r,o)=>{e._pendingAbortRequest={_promise:void 0,_resolve:r,_reject:o,_reason:t,_wasAlreadyErroring:n}}));return e._pendingAbortRequest._promise=a,n||Et(e,t),a}function Pt(e){const t=e._state;if("closed"===t||"errored"===t)return c(new TypeError(`The stream (in ${t} state) is not in the writable state and cannot be closed`));const r=s(((t,r)=>{const o={_resolve:t,_reject:r};e._closeRequest=o})),o=e._writer;var n;return void 0!==o&&e._backpressure&&"writable"===t&&ir(o),Te(n=e._writableStreamController,Ft,0),Qt(n),r}function qt(e,t){"writable"!==e._state?Wt(e):Et(e,t)}function Et(e,t){const r=e._writableStreamController;e._state="erroring",e._storedError=t;const o=e._writer;void 0!==o&&zt(o,t),!function(e){if(void 0===e._inFlightWriteRequest&&void 0===e._inFlightCloseRequest)return!1;return!0}(e)&&r._started&&Wt(e)}function Wt(e){e._state="errored",e._writableStreamController[w]();const t=e._storedError;if(e._writeRequests.forEach((e=>{e._reject(t)})),e._writeRequests=new g,void 0===e._pendingAbortRequest)return void Ot(e);const r=e._pendingAbortRequest;if(e._pendingAbortRequest=void 0,r._wasAlreadyErroring)return r._reject(t),void Ot(e);f(e._writableStreamController[v](r._reason),(()=>(r._resolve(),Ot(e),null)),(t=>(r._reject(t),Ot(e),null)))}function Bt(e){return void 0!==e._closeRequest||void 0!==e._inFlightCloseRequest}function Ot(e){void 0!==e._closeRequest&&(e._closeRequest._reject(e._storedError),e._closeRequest=void 0);const t=e._writer;void 0!==t&&er(t,e._storedError)}function jt(e,t){const r=e._writer;void 0!==r&&t!==e._backpressure&&(t?function(e){rr(e)}(r):ir(r)),e._backpressure=t}Object.defineProperties(WritableStream.prototype,{abort:{enumerable:!0},close:{enumerable:!0},getWriter:{enumerable:!0},locked:{enumerable:!0}}),n(WritableStream.prototype.abort,"abort"),n(WritableStream.prototype.close,"close"),n(WritableStream.prototype.getWriter,"getWriter"),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(WritableStream.prototype,Symbol.toStringTag,{value:"WritableStream",configurable:!0});class WritableStreamDefaultWriter{constructor(e){if(F(e,1,"WritableStreamDefaultWriter"),St(e,"First parameter"),Tt(e))throw new TypeError("This stream has already been locked for exclusive writing by another writer");this._ownerWritableStream=e,e._writer=this;const t=e._state;if("writable"===t)!Bt(e)&&e._backpressure?rr(this):nr(this),Kt(this);else if("erroring"===t)or(this,e._storedError),Kt(this);else if("closed"===t)nr(this),Kt(r=this),tr(r);else{const t=e._storedError;or(this,t),Zt(this,t)}var r}get closed(){return kt(this)?this._closedPromise:c(Xt("closed"))}get desiredSize(){if(!kt(this))throw Xt("desiredSize");if(void 0===this._ownerWritableStream)throw Jt("desiredSize");return function(e){const t=e._ownerWritableStream,r=t._state;if("errored"===r||"erroring"===r)return null;if("closed"===r)return 0;return xt(t._writableStreamController)}(this)}get ready(){return kt(this)?this._readyPromise:c(Xt("ready"))}abort(e=void 0){return kt(this)?void 0===this._ownerWritableStream?c(Jt("abort")):function(e,t){return Ct(e._ownerWritableStream,t)}(this,e):c(Xt("abort"))}close(){if(!kt(this))return c(Xt("close"));const e=this._ownerWritableStream;return void 0===e?c(Jt("close")):Bt(e)?c(new TypeError("Cannot close an already-closing stream")):At(this)}releaseLock(){if(!kt(this))throw Xt("releaseLock");void 0!==this._ownerWritableStream&&It(this)}write(e=void 0){return kt(this)?void 0===this._ownerWritableStream?c(Jt("write to")):Lt(this,e):c(Xt("write"))}}function kt(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_ownerWritableStream")&&e instanceof WritableStreamDefaultWriter)}function At(e){return Pt(e._ownerWritableStream)}function Dt(e,t){"pending"===e._closedPromiseState?er(e,t):function(e,t){Zt(e,t)}(e,t)}function zt(e,t){"pending"===e._readyPromiseState?ar(e,t):function(e,t){or(e,t)}(e,t)}function It(e){const t=e._ownerWritableStream,r=new TypeError("Writer was released and can no longer be used to monitor the stream's closedness");zt(e,r),Dt(e,r),t._writer=void 0,e._ownerWritableStream=void 0}function Lt(e,t){const r=e._ownerWritableStream,o=r._writableStreamController,n=function(e,t){try{return e._strategySizeAlgorithm(t)}catch(t){return Nt(e,t),1}}(o,t);if(r!==e._ownerWritableStream)return c(Jt("write to"));const a=r._state;if("errored"===a)return c(r._storedError);if(Bt(r)||"closed"===a)return c(new TypeError("The stream is closing or closed and cannot be written to"));if("erroring"===a)return c(r._storedError);const i=function(e){return s(((t,r)=>{const o={_resolve:t,_reject:r};e._writeRequests.push(o)}))}(r);return function(e,t,r){try{Te(e,t,r)}catch(t){return void Nt(e,t)}const o=e._controlledWritableStream;if(!Bt(o)&&"writable"===o._state){jt(o,Ht(e))}Qt(e)}(o,t,n),i}Object.defineProperties(WritableStreamDefaultWriter.prototype,{abort:{enumerable:!0},close:{enumerable:!0},releaseLock:{enumerable:!0},write:{enumerable:!0},closed:{enumerable:!0},desiredSize:{enumerable:!0},ready:{enumerable:!0}}),n(WritableStreamDefaultWriter.prototype.abort,"abort"),n(WritableStreamDefaultWriter.prototype.close,"close"),n(WritableStreamDefaultWriter.prototype.releaseLock,"releaseLock"),n(WritableStreamDefaultWriter.prototype.write,"write"),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(WritableStreamDefaultWriter.prototype,Symbol.toStringTag,{value:"WritableStreamDefaultWriter",configurable:!0});const Ft={};class WritableStreamDefaultController{constructor(){throw new TypeError("Illegal constructor")}get abortReason(){if(!$t(this))throw Gt("abortReason");return this._abortReason}get signal(){if(!$t(this))throw Gt("signal");if(void 0===this._abortController)throw new TypeError("WritableStreamDefaultController.prototype.signal is not supported");return this._abortController.signal}error(e=void 0){if(!$t(this))throw Gt("error");"writable"===this._controlledWritableStream._state&&Vt(this,e)}[v](e){const t=this._abortAlgorithm(e);return Yt(this),t}[w](){Ce(this)}}function $t(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_controlledWritableStream")&&e instanceof WritableStreamDefaultController)}function Mt(e,t,r,o,n,a,i,l){t._controlledWritableStream=e,e._writableStreamController=t,t._queue=void 0,t._queueTotalSize=void 0,Ce(t),t._abortReason=void 0,t._abortController=function(){if(gt)return new AbortController}(),t._started=!1,t._strategySizeAlgorithm=l,t._strategyHWM=i,t._writeAlgorithm=o,t._closeAlgorithm=n,t._abortAlgorithm=a;const s=Ht(t);jt(e,s);f(u(r()),(()=>(t._started=!0,Qt(t),null)),(r=>(t._started=!0,qt(e,r),null)))}function Yt(e){e._writeAlgorithm=void 0,e._closeAlgorithm=void 0,e._abortAlgorithm=void 0,e._strategySizeAlgorithm=void 0}function xt(e){return e._strategyHWM-e._queueTotalSize}function Qt(e){const t=e._controlledWritableStream;if(!e._started)return;if(void 0!==t._inFlightWriteRequest)return;if("erroring"===t._state)return void Wt(t);if(0===e._queue.length)return;const r=e._queue.peek().value;r===Ft?function(e){const t=e._controlledWritableStream;(function(e){e._inFlightCloseRequest=e._closeRequest,e._closeRequest=void 0})(t),Re(e);const r=e._closeAlgorithm();Yt(e),f(r,(()=>(function(e){e._inFlightCloseRequest._resolve(void 0),e._inFlightCloseRequest=void 0,"erroring"===e._state&&(e._storedError=void 0,void 0!==e._pendingAbortRequest&&(e._pendingAbortRequest._resolve(),e._pendingAbortRequest=void 0)),e._state="closed";const t=e._writer;void 0!==t&&tr(t)}(t),null)),(e=>(function(e,t){e._inFlightCloseRequest._reject(t),e._inFlightCloseRequest=void 0,void 0!==e._pendingAbortRequest&&(e._pendingAbortRequest._reject(t),e._pendingAbortRequest=void 0),qt(e,t)}(t,e),null)))}(e):function(e,t){const r=e._controlledWritableStream;!function(e){e._inFlightWriteRequest=e._writeRequests.shift()}(r);const o=e._writeAlgorithm(t);f(o,(()=>{!function(e){e._inFlightWriteRequest._resolve(void 0),e._inFlightWriteRequest=void 0}(r);const t=r._state;if(Re(e),!Bt(r)&&"writable"===t){const t=Ht(e);jt(r,t)}return Qt(e),null}),(t=>("writable"===r._state&&Yt(e),function(e,t){e._inFlightWriteRequest._reject(t),e._inFlightWriteRequest=void 0,qt(e,t)}(r,t),null)))}(e,r)}function Nt(e,t){"writable"===e._controlledWritableStream._state&&Vt(e,t)}function Ht(e){return xt(e)<=0}function Vt(e,t){const r=e._controlledWritableStream;Yt(e),Et(r,t)}function Ut(e){return new TypeError(`WritableStream.prototype.${e} can only be used on a WritableStream`)}function Gt(e){return new TypeError(`WritableStreamDefaultController.prototype.${e} can only be used on a WritableStreamDefaultController`)}function Xt(e){return new TypeError(`WritableStreamDefaultWriter.prototype.${e} can only be used on a WritableStreamDefaultWriter`)}function Jt(e){return new TypeError("Cannot "+e+" a stream using a released writer")}function Kt(e){e._closedPromise=s(((t,r)=>{e._closedPromise_resolve=t,e._closedPromise_reject=r,e._closedPromiseState="pending"}))}function Zt(e,t){Kt(e),er(e,t)}function er(e,t){void 0!==e._closedPromise_reject&&(_(e._closedPromise),e._closedPromise_reject(t),e._closedPromise_resolve=void 0,e._closedPromise_reject=void 0,e._closedPromiseState="rejected")}function tr(e){void 0!==e._closedPromise_resolve&&(e._closedPromise_resolve(void 0),e._closedPromise_resolve=void 0,e._closedPromise_reject=void 0,e._closedPromiseState="resolved")}function rr(e){e._readyPromise=s(((t,r)=>{e._readyPromise_resolve=t,e._readyPromise_reject=r})),e._readyPromiseState="pending"}function or(e,t){rr(e),ar(e,t)}function nr(e){rr(e),ir(e)}function ar(e,t){void 0!==e._readyPromise_reject&&(_(e._readyPromise),e._readyPromise_reject(t),e._readyPromise_resolve=void 0,e._readyPromise_reject=void 0,e._readyPromiseState="rejected")}function ir(e){void 0!==e._readyPromise_resolve&&(e._readyPromise_resolve(void 0),e._readyPromise_resolve=void 0,e._readyPromise_reject=void 0,e._readyPromiseState="fulfilled")}Object.defineProperties(WritableStreamDefaultController.prototype,{abortReason:{enumerable:!0},signal:{enumerable:!0},error:{enumerable:!0}}),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(WritableStreamDefaultController.prototype,Symbol.toStringTag,{value:"WritableStreamDefaultController",configurable:!0});const lr="undefined"!=typeof globalThis?globalThis:"undefined"!=typeof self?self:"undefined"!=typeof global?global:void 0;const sr=function(){const e=null==lr?void 0:lr.DOMException;return function(e){if("function"!=typeof e&&"object"!=typeof e)return!1;if("DOMException"!==e.name)return!1;try{return new e,!0}catch(e){return!1}}(e)?e:void 0}()||function(){const e=function(e,t){this.message=e||"",this.name=t||"Error",Error.captureStackTrace&&Error.captureStackTrace(this,this.constructor)};return n(e,"DOMException"),e.prototype=Object.create(Error.prototype),Object.defineProperty(e.prototype,"constructor",{value:e,writable:!0,configurable:!0}),e}();function ur(e,r,o,n,a,i){const l=N(e),h=vt(r);e._disturbed=!0;let p=!1,y=u(void 0);return s(((S,g)=>{let v;if(void 0!==i){if(v=()=>{const t=void 0!==i.reason?i.reason:new sr("Aborted","AbortError"),o=[];n||o.push((()=>"writable"===r._state?Ct(r,t):u(void 0))),a||o.push((()=>"readable"===e._state?kr(e,t):u(void 0))),q((()=>Promise.all(o.map((e=>e())))),!0,t)},i.aborted)return void v();i.addEventListener("abort",v)}var w,R,T;if(P(e,l._closedPromise,(e=>(n?W(!0,e):q((()=>Ct(r,e)),!0,e),null))),P(r,h._closedPromise,(t=>(a?W(!0,t):q((()=>kr(e,t)),!0,t),null))),w=e,R=l._closedPromise,T=()=>(o?W():q((()=>function(e){const t=e._ownerWritableStream,r=t._state;return Bt(t)||"closed"===r?u(void 0):"errored"===r?c(t._storedError):At(e)}(h))),null),"closed"===w._state?T():b(R,T),Bt(r)||"closed"===r._state){const t=new TypeError("the destination writable stream closed before all data could be piped to it");a?W(!0,t):q((()=>kr(e,t)),!0,t)}function C(){const e=y;return d(y,(()=>e!==y?C():void 0))}function P(e,t,r){"errored"===e._state?r(e._storedError):m(t,r)}function q(e,t,o){function n(){return f(e(),(()=>B(t,o)),(e=>B(!0,e))),null}p||(p=!0,"writable"!==r._state||Bt(r)?n():b(C(),n))}function W(e,t){p||(p=!0,"writable"!==r._state||Bt(r)?B(e,t):b(C(),(()=>B(e,t))))}function B(e,t){return It(h),E(l),void 0!==i&&i.removeEventListener("abort",v),e?g(t):S(void 0),null}_(s(((e,r)=>{!function o(n){n?e():d(p?u(!0):d(h._readyPromise,(()=>s(((e,r)=>{J(l,{_chunkSteps:r=>{y=d(Lt(h,r),void 0,t),e(!1)},_closeSteps:()=>e(!0),_errorSteps:r})})))),o,r)}(!1)})))}))}class ReadableStreamDefaultController{constructor(){throw new TypeError("Illegal constructor")}get desiredSize(){if(!cr(this))throw gr("desiredSize");return pr(this)}close(){if(!cr(this))throw gr("close");if(!yr(this))throw new TypeError("The stream is not in a state that permits close");mr(this)}enqueue(e=void 0){if(!cr(this))throw gr("enqueue");if(!yr(this))throw new TypeError("The stream is not in a state that permits enqueue");return hr(this,e)}error(e=void 0){if(!cr(this))throw gr("error");_r(this,e)}[R](e){Ce(this);const t=this._cancelAlgorithm(e);return br(this),t}[T](e){const t=this._controlledReadableStream;if(this._queue.length>0){const r=Re(this);this._closeRequested&&0===this._queue.length?(br(this),Ar(t)):dr(this),e._chunkSteps(r)}else H(t,e),dr(this)}[C](){}}function cr(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_controlledReadableStream")&&e instanceof ReadableStreamDefaultController)}function dr(e){if(!fr(e))return;if(e._pulling)return void(e._pullAgain=!0);e._pulling=!0;f(e._pullAlgorithm(),(()=>(e._pulling=!1,e._pullAgain&&(e._pullAgain=!1,dr(e)),null)),(t=>(_r(e,t),null)))}function fr(e){const t=e._controlledReadableStream;if(!yr(e))return!1;if(!e._started)return!1;if(jr(t)&&U(t)>0)return!0;return pr(e)>0}function br(e){e._pullAlgorithm=void 0,e._cancelAlgorithm=void 0,e._strategySizeAlgorithm=void 0}function mr(e){if(!yr(e))return;const t=e._controlledReadableStream;e._closeRequested=!0,0===e._queue.length&&(br(e),Ar(t))}function hr(e,t){if(!yr(e))return;const r=e._controlledReadableStream;if(jr(r)&&U(r)>0)V(r,t,!1);else{let r;try{r=e._strategySizeAlgorithm(t)}catch(t){throw _r(e,t),t}try{Te(e,t,r)}catch(t){throw _r(e,t),t}}dr(e)}function _r(e,t){const r=e._controlledReadableStream;"readable"===r._state&&(Ce(e),br(e),Dr(r,t))}function pr(e){const t=e._controlledReadableStream._state;return"errored"===t?null:"closed"===t?0:e._strategyHWM-e._queueTotalSize}function yr(e){const t=e._controlledReadableStream._state;return!e._closeRequested&&"readable"===t}function Sr(e,t,r,o,n,a,i){t._controlledReadableStream=e,t._queue=void 0,t._queueTotalSize=void 0,Ce(t),t._started=!1,t._closeRequested=!1,t._pullAgain=!1,t._pulling=!1,t._strategySizeAlgorithm=i,t._strategyHWM=a,t._pullAlgorithm=o,t._cancelAlgorithm=n,e._readableStreamController=t;f(u(r()),(()=>(t._started=!0,dr(t),null)),(e=>(_r(t,e),null)))}function gr(e){return new TypeError(`ReadableStreamDefaultController.prototype.${e} can only be used on a ReadableStreamDefaultController`)}function vr(e,t){return qe(e._readableStreamController)?function(e){let t,r,o,n,a,i=N(e),l=!1,c=!1,d=!1,f=!1,b=!1;const h=s((e=>{a=e}));function _(e){m(e._closedPromise,(t=>(e!==i||(Ve(o._readableStreamController,t),Ve(n._readableStreamController,t),f&&b||a(void 0)),null)))}function y(){lt(i)&&(E(i),i=N(e),_(i));J(i,{_chunkSteps:t=>{p((()=>{c=!1,d=!1;const r=t;let i=t;if(!f&&!b)try{i=we(t)}catch(t){return 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TypeError(`ReadableStream.prototype.${e} can only be used on a ReadableStream`)}function Ir(e,t){z(e,t);const r=null==e?void 0:e.highWaterMark;return $(r,"highWaterMark","QueuingStrategyInit"),{highWaterMark:M(r)}}Object.defineProperties(ReadableStream,{from:{enumerable:!0}}),Object.defineProperties(ReadableStream.prototype,{cancel:{enumerable:!0},getReader:{enumerable:!0},pipeThrough:{enumerable:!0},pipeTo:{enumerable:!0},tee:{enumerable:!0},values:{enumerable:!0},locked:{enumerable:!0}}),n(ReadableStream.from,"from"),n(ReadableStream.prototype.cancel,"cancel"),n(ReadableStream.prototype.getReader,"getReader"),n(ReadableStream.prototype.pipeThrough,"pipeThrough"),n(ReadableStream.prototype.pipeTo,"pipeTo"),n(ReadableStream.prototype.tee,"tee"),n(ReadableStream.prototype.values,"values"),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(ReadableStream.prototype,Symbol.toStringTag,{value:"ReadableStream",configurable:!0}),Object.defineProperty(ReadableStream.prototype,me,{value:ReadableStream.prototype.values,writable:!0,configurable:!0});const Lr=e=>e.byteLength;n(Lr,"size");class ByteLengthQueuingStrategy{constructor(e){F(e,1,"ByteLengthQueuingStrategy"),e=Ir(e,"First parameter"),this._byteLengthQueuingStrategyHighWaterMark=e.highWaterMark}get highWaterMark(){if(!$r(this))throw Fr("highWaterMark");return this._byteLengthQueuingStrategyHighWaterMark}get size(){if(!$r(this))throw Fr("size");return Lr}}function Fr(e){return new TypeError(`ByteLengthQueuingStrategy.prototype.${e} can only be used on a ByteLengthQueuingStrategy`)}function $r(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_byteLengthQueuingStrategyHighWaterMark")&&e instanceof ByteLengthQueuingStrategy)}Object.defineProperties(ByteLengthQueuingStrategy.prototype,{highWaterMark:{enumerable:!0},size:{enumerable:!0}}),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(ByteLengthQueuingStrategy.prototype,Symbol.toStringTag,{value:"ByteLengthQueuingStrategy",configurable:!0});const Mr=()=>1;n(Mr,"size");class CountQueuingStrategy{constructor(e){F(e,1,"CountQueuingStrategy"),e=Ir(e,"First parameter"),this._countQueuingStrategyHighWaterMark=e.highWaterMark}get highWaterMark(){if(!xr(this))throw Yr("highWaterMark");return this._countQueuingStrategyHighWaterMark}get size(){if(!xr(this))throw Yr("size");return Mr}}function Yr(e){return new TypeError(`CountQueuingStrategy.prototype.${e} can only be used on a CountQueuingStrategy`)}function xr(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_countQueuingStrategyHighWaterMark")&&e instanceof CountQueuingStrategy)}function Qr(e,t,r){return I(e,r),r=>S(e,t,[r])}function Nr(e,t,r){return I(e,r),r=>y(e,t,[r])}function Hr(e,t,r){return I(e,r),(r,o)=>S(e,t,[r,o])}function Vr(e,t,r){return I(e,r),r=>S(e,t,[r])}Object.defineProperties(CountQueuingStrategy.prototype,{highWaterMark:{enumerable:!0},size:{enumerable:!0}}),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(CountQueuingStrategy.prototype,Symbol.toStringTag,{value:"CountQueuingStrategy",configurable:!0});class TransformStream{constructor(e={},t={},r={}){void 0===e&&(e=null);const o=bt(t,"Second parameter"),n=bt(r,"Third parameter"),a=function(e,t){z(e,t);const r=null==e?void 0:e.cancel,o=null==e?void 0:e.flush,n=null==e?void 0:e.readableType,a=null==e?void 0:e.start,i=null==e?void 0:e.transform,l=null==e?void 0:e.writableType;return{cancel:void 0===r?void 0:Vr(r,e,`${t} has member 'cancel' that`),flush:void 0===o?void 0:Qr(o,e,`${t} has member 'flush' that`),readableType:n,start:void 0===a?void 0:Nr(a,e,`${t} has member 'start' that`),transform:void 0===i?void 0:Hr(i,e,`${t} has member 'transform' 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eo(r),f(n,(()=>("errored"===o._state?ao(r,o._storedError):(_r(o._readableStreamController,t),no(r)),null)),(e=>(_r(o._readableStreamController,e),ao(r,e),null))),r._finishPromise}(e,t)}function c(){return function(e){const t=e._transformStreamController;if(void 0!==t._finishPromise)return t._finishPromise;const r=e._readable;t._finishPromise=s(((e,r)=>{t._finishPromise_resolve=e,t._finishPromise_reject=r}));const o=t._flushAlgorithm();return eo(t),f(o,(()=>("errored"===r._state?ao(t,r._storedError):(mr(r._readableStreamController),no(t)),null)),(e=>(_r(r._readableStreamController,e),ao(t,e),null))),t._finishPromise}(e)}function d(){return function(e){return Kr(e,!1),e._backpressureChangePromise}(e)}function b(t){return function(e,t){const r=e._transformStreamController;if(void 0!==r._finishPromise)return r._finishPromise;const o=e._writable;r._finishPromise=s(((e,t)=>{r._finishPromise_resolve=e,r._finishPromise_reject=t}));const n=r._cancelAlgorithm(t);return eo(r),f(n,(()=>("errored"===o._state?ao(r,o._storedError):(Nt(o._writableStreamController,t),Jr(e),no(r)),null)),(t=>(Nt(o._writableStreamController,t),Jr(e),ao(r,t),null))),r._finishPromise}(e,t)}e._writable=function(e,t,r,o,n=1,a=(()=>1)){const i=Object.create(WritableStream.prototype);return wt(i),Mt(i,Object.create(WritableStreamDefaultController.prototype),e,t,r,o,n,a),i}(i,l,c,u,r,o),e._readable=Er(i,d,b,n,a),e._backpressure=void 0,e._backpressureChangePromise=void 0,e._backpressureChangePromise_resolve=void 0,Kr(e,!0),e._transformStreamController=void 0}(this,s((e=>{m=e})),d,b,i,l),function(e,t){const r=Object.create(TransformStreamDefaultController.prototype);let o,n,a;o=void 0!==t.transform?e=>t.transform(e,r):e=>{try{return to(r,e),u(void 0)}catch(e){return c(e)}};n=void 0!==t.flush?()=>t.flush(r):()=>u(void 0);a=void 0!==t.cancel?e=>t.cancel(e):()=>u(void 0);!function(e,t,r,o,n){t._controlledTransformStream=e,e._transformStreamController=t,t._transformAlgorithm=r,t._flushAlgorithm=o,t._cancelAlgorithm=n,t._finishPromise=void 0,t._finishPromise_resolve=void 0,t._finishPromise_reject=void 0}(e,r,o,n,a)}(this,a),void 0!==a.start?m(a.start(this._transformStreamController)):m(void 0)}get readable(){if(!Ur(this))throw io("readable");return this._readable}get writable(){if(!Ur(this))throw io("writable");return this._writable}}function Ur(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_transformStreamController")&&e instanceof TransformStream)}function Gr(e,t){_r(e._readable._readableStreamController,t),Xr(e,t)}function Xr(e,t){eo(e._transformStreamController),Nt(e._writable._writableStreamController,t),Jr(e)}function Jr(e){e._backpressure&&Kr(e,!1)}function Kr(e,t){void 0!==e._backpressureChangePromise&&e._backpressureChangePromise_resolve(),e._backpressureChangePromise=s((t=>{e._backpressureChangePromise_resolve=t})),e._backpressure=t}Object.defineProperties(TransformStream.prototype,{readable:{enumerable:!0},writable:{enumerable:!0}}),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(TransformStream.prototype,Symbol.toStringTag,{value:"TransformStream",configurable:!0});class TransformStreamDefaultController{constructor(){throw new TypeError("Illegal constructor")}get desiredSize(){if(!Zr(this))throw oo("desiredSize");return pr(this._controlledTransformStream._readable._readableStreamController)}enqueue(e=void 0){if(!Zr(this))throw oo("enqueue");to(this,e)}error(e=void 0){if(!Zr(this))throw oo("error");var t;t=e,Gr(this._controlledTransformStream,t)}terminate(){if(!Zr(this))throw oo("terminate");!function(e){const t=e._controlledTransformStream;mr(t._readable._readableStreamController);const r=new TypeError("TransformStream 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0!==e._finishPromise_reject&&(_(e._finishPromise),e._finishPromise_reject(t),e._finishPromise_resolve=void 0,e._finishPromise_reject=void 0)}function io(e){return new TypeError(`TransformStream.prototype.${e} can only be used on a TransformStream`)}Object.defineProperties(TransformStreamDefaultController.prototype,{enqueue:{enumerable:!0},error:{enumerable:!0},terminate:{enumerable:!0},desiredSize:{enumerable:!0}}),n(TransformStreamDefaultController.prototype.enqueue,"enqueue"),n(TransformStreamDefaultController.prototype.error,"error"),n(TransformStreamDefaultController.prototype.terminate,"terminate"),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(TransformStreamDefaultController.prototype,Symbol.toStringTag,{value:"TransformStreamDefaultController",configurable:!0});const lo={ReadableStream:ReadableStream,ReadableStreamDefaultController:ReadableStreamDefaultController,ReadableByteStreamController:ReadableByteStreamController,ReadableStreamBYOBRequest:ReadableStreamBYOBRequest,ReadableStreamDefaultReader:ReadableStreamDefaultReader,ReadableStreamBYOBReader:ReadableStreamBYOBReader,WritableStream:WritableStream,WritableStreamDefaultController:WritableStreamDefaultController,WritableStreamDefaultWriter:WritableStreamDefaultWriter,ByteLengthQueuingStrategy:ByteLengthQueuingStrategy,CountQueuingStrategy:CountQueuingStrategy,TransformStream:TransformStream,TransformStreamDefaultController:TransformStreamDefaultController};if(void 0!==lr)for(const e in lo)Object.prototype.hasOwnProperty.call(lo,e)&&Object.defineProperty(lr,e,{value:lo[e],writable:!0,configurable:!0});e.ByteLengthQueuingStrategy=ByteLengthQueuingStrategy,e.CountQueuingStrategy=CountQueuingStrategy,e.ReadableByteStreamController=ReadableByteStreamController,e.ReadableStream=ReadableStream,e.ReadableStreamBYOBReader=ReadableStreamBYOBReader,e.ReadableStreamBYOBRequest=ReadableStreamBYOBRequest,e.ReadableStreamDefaultController=ReadableStreamDefaultController,e.ReadableStreamDefaultReader=ReadableStreamDefaultReader,e.TransformStream=TransformStream,e.TransformStreamDefaultController=TransformStreamDefaultController,e.WritableStream=WritableStream,e.WritableStreamDefaultController=WritableStreamDefaultController,e.WritableStreamDefaultWriter=WritableStreamDefaultWriter})); +//# sourceMappingURL=polyfill.es6.min.js.map diff --git a/node_modules/web-streams-polyfill/dist/polyfill.es6.min.js.map b/node_modules/web-streams-polyfill/dist/polyfill.es6.min.js.map new file mode 100644 index 00000000..8f6055cb --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/polyfill.es6.min.js.map @@ -0,0 +1 @@ +{"version":3,"file":"polyfill.es6.min.js","sources":["../src/utils.ts","../src/lib/helpers/miscellaneous.ts","../src/lib/helpers/webidl.ts","../src/lib/simple-queue.ts","../src/lib/abstract-ops/internal-methods.ts","../src/lib/readable-stream/generic-reader.ts","../src/stub/number-isfinite.ts","../src/stub/math-trunc.ts","../src/lib/validators/basic.ts","../src/lib/validators/readable-stream.ts","../src/lib/readable-stream/default-reader.ts","../node_modules/tslib/tslib.es6.js","../src/lib/abstract-ops/ecmascript.ts","../src/target/es5/stub/async-iterator-prototype.ts","../src/lib/readable-stream/async-iterator.ts","../src/stub/number-isnan.ts","../src/lib/abstract-ops/miscellaneous.ts","../src/lib/abstract-ops/queue-with-sizes.ts","../src/lib/helpers/array-buffer-view.ts","../src/lib/readable-stream/byte-stream-controller.ts","../src/lib/readable-stream/byob-reader.ts","../src/lib/validators/reader-options.ts","../src/lib/abstract-ops/queuing-strategy.ts","../src/lib/validators/queuing-strategy.ts","../src/lib/validators/underlying-sink.ts","../src/lib/validators/writable-stream.ts","../src/lib/abort-signal.ts","../src/lib/writable-stream.ts","../src/globals.ts","../src/stub/dom-exception.ts","../src/lib/readable-stream/pipe.ts","../src/lib/readable-stream/default-controller.ts","../src/lib/readable-stream/tee.ts","../src/lib/readable-stream/from.ts","../src/lib/readable-stream/readable-stream-like.ts","../src/lib/validators/underlying-source.ts","../src/lib/validators/pipe-options.ts","../src/lib/readable-stream.ts","../src/lib/validators/readable-writable-pair.ts","../src/lib/validators/iterator-options.ts","../src/lib/validators/queuing-strategy-init.ts","../src/lib/byte-length-queuing-strategy.ts","../src/lib/count-queuing-strategy.ts","../src/lib/validators/transformer.ts","../src/lib/transform-stream.ts","../src/polyfill.ts"],"sourcesContent":["export function noop(): undefined {\n return undefined;\n}\n","import { noop } from '../../utils';\nimport { AssertionError } from '../../stub/assert';\n\nexport function typeIsObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport const rethrowAssertionErrorRejection: (e: any) => void =\n DEBUG ? e => {\n // Used throughout the reference implementation, as `.catch(rethrowAssertionErrorRejection)`, to ensure any errors\n // get shown. There are places in the spec where we do promise transformations and purposefully ignore or don't\n // expect any errors, but assertion errors are always problematic.\n if (e && e instanceof AssertionError) {\n setTimeout(() => {\n throw e;\n }, 0);\n }\n } : noop;\n\nexport function setFunctionName(fn: Function, name: string): void {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n } catch {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n}\n","import { rethrowAssertionErrorRejection } from './miscellaneous';\nimport assert from '../../stub/assert';\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\n\n// https://webidl.spec.whatwg.org/#a-new-promise\nexport function newPromise(executor: (\n resolve: (value: T | PromiseLike) => void,\n reject: (reason?: any) => void\n) => void): Promise {\n return new originalPromise(executor);\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-resolved-with\nexport function promiseResolvedWith(value: T | PromiseLike): Promise {\n return newPromise(resolve => resolve(value));\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-rejected-with\nexport function promiseRejectedWith(reason: any): Promise {\n return originalPromiseReject(reason);\n}\n\nexport function PerformPromiseThen(\n promise: Promise,\n onFulfilled?: (value: T) => TResult1 | PromiseLike,\n onRejected?: (reason: any) => TResult2 | PromiseLike): Promise {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected) as Promise;\n}\n\n// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n// from that handler. To prevent this, return null instead of void from all handlers.\n// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\nexport function uponPromise(\n promise: Promise,\n onFulfilled?: (value: T) => null | PromiseLike,\n onRejected?: (reason: any) => null | PromiseLike): void {\n PerformPromiseThen(\n PerformPromiseThen(promise, onFulfilled, onRejected),\n undefined,\n rethrowAssertionErrorRejection\n );\n}\n\nexport function uponFulfillment(promise: Promise, onFulfilled: (value: T) => null | PromiseLike): void {\n uponPromise(promise, onFulfilled);\n}\n\nexport function uponRejection(promise: Promise, onRejected: (reason: any) => null | PromiseLike): void {\n uponPromise(promise, undefined, onRejected);\n}\n\nexport function transformPromiseWith(\n promise: Promise,\n fulfillmentHandler?: (value: T) => TResult1 | PromiseLike,\n rejectionHandler?: (reason: any) => TResult2 | PromiseLike): Promise {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\n\nexport function setPromiseIsHandledToTrue(promise: Promise): void {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\nlet _queueMicrotask: (callback: () => void) => void = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n } else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n};\n\nexport { _queueMicrotask as queueMicrotask };\n\nexport function reflectCall(F: (this: T, ...fnArgs: A) => R, V: T, args: A): R {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n}\n\nexport function promiseCall(F: (this: T, ...fnArgs: A) => R | PromiseLike,\n V: T,\n args: A): Promise {\n assert(typeof F === 'function');\n assert(V !== undefined);\n assert(Array.isArray(args));\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n } catch (value) {\n return promiseRejectedWith(value);\n }\n}\n","import assert from '../stub/assert';\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n\ninterface Node {\n _elements: T[];\n _next: Node | undefined;\n}\n\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nexport class SimpleQueue {\n private _front: Node;\n private _back: Node;\n private _cursor = 0;\n private _size = 0;\n\n constructor() {\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n\n get length(): number {\n return this._size;\n }\n\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element: T): void {\n const oldBack = this._back;\n let newBack = oldBack;\n assert(oldBack._next === undefined);\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n assert(elements.length === QUEUE_MAX_ARRAY_SIZE);\n assert(oldFront._next !== undefined);\n newFront = oldFront._next!;\n newCursor = 0;\n }\n\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined!;\n\n return element;\n }\n\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback: (element: T) => void): void {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n assert(node._next !== undefined);\n assert(i === QUEUE_MAX_ARRAY_SIZE);\n node = node._next!;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n}\n","export const AbortSteps = Symbol('[[AbortSteps]]');\nexport const ErrorSteps = Symbol('[[ErrorSteps]]');\nexport const CancelSteps = Symbol('[[CancelSteps]]');\nexport const PullSteps = Symbol('[[PullSteps]]');\nexport const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n","import assert from '../../stub/assert';\nimport { ReadableStream, ReadableStreamCancel, type ReadableStreamReader } from '../readable-stream';\nimport { newPromise, setPromiseIsHandledToTrue } from '../helpers/webidl';\nimport { ReleaseSteps } from '../abstract-ops/internal-methods';\n\nexport function ReadableStreamReaderGenericInitialize(reader: ReadableStreamReader, stream: ReadableStream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n } else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n } else {\n assert(stream._state === 'errored');\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n}\n\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\n\nexport function ReadableStreamReaderGenericCancel(reader: ReadableStreamReader, reason: any): Promise {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n return ReadableStreamCancel(stream, reason);\n}\n\nexport function ReadableStreamReaderGenericRelease(reader: ReadableStreamReader) {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n assert(stream._reader === reader);\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n } else {\n defaultReaderClosedPromiseResetToRejected(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n\n stream._readableStreamController[ReleaseSteps]();\n\n stream._reader = undefined;\n reader._ownerReadableStream = undefined!;\n}\n\n// Helper functions for the readers.\n\nexport function readerLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nexport function defaultReaderClosedPromiseInitialize(reader: ReadableStreamReader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n}\n\nexport function defaultReaderClosedPromiseInitializeAsRejected(reader: ReadableStreamReader, reason: any) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseInitializeAsResolved(reader: ReadableStreamReader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n}\n\nexport function defaultReaderClosedPromiseReject(reader: ReadableStreamReader, reason: any) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n\nexport function defaultReaderClosedPromiseResetToRejected(reader: ReadableStreamReader, reason: any) {\n assert(reader._closedPromise_resolve === undefined);\n assert(reader._closedPromise_reject === undefined);\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseResolve(reader: ReadableStreamReader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite: typeof Number.isFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n};\n\nexport default NumberIsFinite;\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc: typeof Math.trunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\nexport default MathTrunc;\n","import NumberIsFinite from '../../stub/number-isfinite';\nimport MathTrunc from '../../stub/math-trunc';\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nexport function isDictionary(x: any): x is object | null {\n return typeof x === 'object' || typeof x === 'function';\n}\n\nexport function assertDictionary(obj: unknown,\n context: string): asserts obj is object | null | undefined {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport type AnyFunction = (...args: any[]) => any;\n\n// https://heycam.github.io/webidl/#idl-callback-functions\nexport function assertFunction(x: unknown, context: string): asserts x is AnyFunction {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-object\nexport function isObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport function assertObject(x: unknown,\n context: string): asserts x is object {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport function assertRequiredArgument(x: T | undefined,\n position: number,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n}\n\nexport function assertRequiredField(x: T | undefined,\n field: string,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nexport function convertUnrestrictedDouble(value: unknown): number {\n return Number(value);\n}\n\nfunction censorNegativeZero(x: number): number {\n return x === 0 ? 0 : x;\n}\n\nfunction integerPart(x: number): number {\n return censorNegativeZero(MathTrunc(x));\n}\n\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nexport function convertUnsignedLongLongWithEnforceRange(value: unknown, context: string): number {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n\n let x = Number(value);\n x = censorNegativeZero(x);\n\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n\n x = integerPart(x);\n\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n\n return x;\n}\n","import { IsReadableStream, ReadableStream } from '../readable-stream';\n\nexport function assertReadableStream(x: unknown, context: string): asserts x is ReadableStream {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, ReadableStream } from '../readable-stream';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { PullSteps } from '../abstract-ops/internal-methods';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\n\n/**\n * A result returned by {@link ReadableStreamDefaultReader.read}.\n *\n * @public\n */\nexport type ReadableStreamDefaultReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value?: undefined;\n}\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamDefaultReader(stream: ReadableStream): ReadableStreamDefaultReader {\n return new ReadableStreamDefaultReader(stream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadRequest(stream: ReadableStream,\n readRequest: ReadRequest): void {\n assert(IsReadableStreamDefaultReader(stream._reader));\n assert(stream._state === 'readable');\n\n (stream._reader! as ReadableStreamDefaultReader)._readRequests.push(readRequest);\n}\n\nexport function ReadableStreamFulfillReadRequest(stream: ReadableStream, chunk: R | undefined, done: boolean) {\n const reader = stream._reader as ReadableStreamDefaultReader;\n\n assert(reader._readRequests.length > 0);\n\n const readRequest = reader._readRequests.shift()!;\n if (done) {\n readRequest._closeSteps();\n } else {\n readRequest._chunkSteps(chunk!);\n }\n}\n\nexport function ReadableStreamGetNumReadRequests(stream: ReadableStream): number {\n return (stream._reader as ReadableStreamDefaultReader)._readRequests.length;\n}\n\nexport function ReadableStreamHasDefaultReader(stream: ReadableStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadRequest {\n _chunkSteps(chunk: R): void;\n\n _closeSteps(): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamDefaultReader {\n /** @internal */\n _ownerReadableStream!: ReadableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(): Promise> {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamDefaultReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamDefaultReader(x: any): x is ReadableStreamDefaultReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultReader;\n}\n\nexport function ReadableStreamDefaultReaderRead(reader: ReadableStreamDefaultReader,\n readRequest: ReadRequest): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n } else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n } else {\n assert(stream._state === 'readable');\n stream._readableStreamController[PullSteps](readRequest as ReadRequest);\n }\n}\n\nexport function ReadableStreamDefaultReaderRelease(reader: ReadableStreamDefaultReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n}\n\nexport function ReadableStreamDefaultReaderErrorReadRequests(reader: ReadableStreamDefaultReader, e: any) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nfunction defaultReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n","/******************************************************************************\r\nCopyright (c) Microsoft Corporation.\r\n\r\nPermission to use, copy, modify, and/or distribute this software for any\r\npurpose with or without fee is hereby granted.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\r\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY\r\nAND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\r\n***************************************************************************** */\r\n/* global Reflect, Promise, SuppressedError, Symbol */\r\n\r\nvar extendStatics = function(d, b) {\r\n extendStatics = Object.setPrototypeOf ||\r\n ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\r\n return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n if (typeof b !== \"function\" && b !== null)\r\n throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\r\n extendStatics(d, b);\r\n function __() { this.constructor = d; }\r\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\nexport var __assign = function() {\r\n __assign = Object.assign || function __assign(t) {\r\n for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n s = arguments[i];\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n }\r\n return t;\r\n }\r\n return __assign.apply(this, arguments);\r\n}\r\n\r\nexport function __rest(s, e) {\r\n var t = {};\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\r\n t[p] = s[p];\r\n if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\r\n for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {\r\n if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))\r\n t[p[i]] = s[p[i]];\r\n }\r\n return t;\r\n}\r\n\r\nexport function __decorate(decorators, target, key, desc) {\r\n var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\r\n if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\r\n else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\r\n return c > 3 && r && Object.defineProperty(target, key, r), r;\r\n}\r\n\r\nexport function __param(paramIndex, decorator) {\r\n return function (target, key) { decorator(target, key, paramIndex); }\r\n}\r\n\r\nexport function __esDecorate(ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {\r\n function accept(f) { if (f !== void 0 && typeof f !== \"function\") throw new TypeError(\"Function expected\"); return f; }\r\n var kind = contextIn.kind, key = kind === \"getter\" ? \"get\" : kind === \"setter\" ? \"set\" : \"value\";\r\n var target = !descriptorIn && ctor ? contextIn[\"static\"] ? ctor : ctor.prototype : null;\r\n var descriptor = descriptorIn || (target ? Object.getOwnPropertyDescriptor(target, contextIn.name) : {});\r\n var _, done = false;\r\n for (var i = decorators.length - 1; i >= 0; i--) {\r\n var context = {};\r\n for (var p in contextIn) context[p] = p === \"access\" ? {} : contextIn[p];\r\n for (var p in contextIn.access) context.access[p] = contextIn.access[p];\r\n context.addInitializer = function (f) { if (done) throw new TypeError(\"Cannot add initializers after decoration has completed\"); extraInitializers.push(accept(f || null)); };\r\n var result = (0, decorators[i])(kind === \"accessor\" ? { get: descriptor.get, set: descriptor.set } : descriptor[key], context);\r\n if (kind === \"accessor\") {\r\n if (result === void 0) continue;\r\n if (result === null || typeof result !== \"object\") throw new TypeError(\"Object expected\");\r\n if (_ = accept(result.get)) descriptor.get = _;\r\n if (_ = accept(result.set)) descriptor.set = _;\r\n if (_ = accept(result.init)) initializers.unshift(_);\r\n }\r\n else if (_ = accept(result)) {\r\n if (kind === \"field\") initializers.unshift(_);\r\n else descriptor[key] = _;\r\n }\r\n }\r\n if (target) Object.defineProperty(target, contextIn.name, descriptor);\r\n done = true;\r\n};\r\n\r\nexport function __runInitializers(thisArg, initializers, value) {\r\n var useValue = arguments.length > 2;\r\n for (var i = 0; i < initializers.length; i++) {\r\n value = useValue ? initializers[i].call(thisArg, value) : initializers[i].call(thisArg);\r\n }\r\n return useValue ? value : void 0;\r\n};\r\n\r\nexport function __propKey(x) {\r\n return typeof x === \"symbol\" ? x : \"\".concat(x);\r\n};\r\n\r\nexport function __setFunctionName(f, name, prefix) {\r\n if (typeof name === \"symbol\") name = name.description ? \"[\".concat(name.description, \"]\") : \"\";\r\n return Object.defineProperty(f, \"name\", { configurable: true, value: prefix ? \"\".concat(prefix, \" \", name) : name });\r\n};\r\n\r\nexport function __metadata(metadataKey, metadataValue) {\r\n if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(metadataKey, metadataValue);\r\n}\r\n\r\nexport function __awaiter(thisArg, _arguments, P, generator) {\r\n function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }\r\n return new (P || (P = Promise))(function (resolve, reject) {\r\n function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\r\n function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\r\n function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }\r\n step((generator = generator.apply(thisArg, _arguments || [])).next());\r\n });\r\n}\r\n\r\nexport function __generator(thisArg, body) {\r\n var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n function verb(n) { return function (v) { return step([n, v]); }; }\r\n function step(op) {\r\n if (f) throw new TypeError(\"Generator is already executing.\");\r\n while (g && (g = 0, op[0] && (_ = 0)), _) try {\r\n if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\r\n if (y = 0, t) op = [op[0] & 2, t.value];\r\n switch (op[0]) {\r\n case 0: case 1: t = op; break;\r\n case 4: _.label++; return { value: op[1], done: false };\r\n case 5: _.label++; y = op[1]; op = [0]; continue;\r\n case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n default:\r\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n if (t[2]) _.ops.pop();\r\n _.trys.pop(); continue;\r\n }\r\n op = body.call(thisArg, _);\r\n } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n }\r\n}\r\n\r\nexport var __createBinding = Object.create ? (function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n var desc = Object.getOwnPropertyDescriptor(m, k);\r\n if (!desc || (\"get\" in desc ? !m.__esModule : desc.writable || desc.configurable)) {\r\n desc = { enumerable: true, get: function() { return m[k]; } };\r\n }\r\n Object.defineProperty(o, k2, desc);\r\n}) : (function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n o[k2] = m[k];\r\n});\r\n\r\nexport function __exportStar(m, o) {\r\n for (var p in m) if (p !== \"default\" && !Object.prototype.hasOwnProperty.call(o, p)) __createBinding(o, m, p);\r\n}\r\n\r\nexport function __values(o) {\r\n var s = typeof Symbol === \"function\" && Symbol.iterator, m = s && o[s], i = 0;\r\n if (m) return m.call(o);\r\n if (o && typeof o.length === \"number\") return {\r\n next: function () {\r\n if (o && i >= o.length) o = void 0;\r\n return { value: o && o[i++], done: !o };\r\n }\r\n };\r\n throw new TypeError(s ? \"Object is not iterable.\" : \"Symbol.iterator is not defined.\");\r\n}\r\n\r\nexport function __read(o, n) {\r\n var m = typeof Symbol === \"function\" && o[Symbol.iterator];\r\n if (!m) return o;\r\n var i = m.call(o), r, ar = [], e;\r\n try {\r\n while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\r\n }\r\n catch (error) { e = { error: error }; }\r\n finally {\r\n try {\r\n if (r && !r.done && (m = i[\"return\"])) m.call(i);\r\n }\r\n finally { if (e) throw e.error; }\r\n }\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spread() {\r\n for (var ar = [], i = 0; i < arguments.length; i++)\r\n ar = ar.concat(__read(arguments[i]));\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spreadArrays() {\r\n for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;\r\n for (var r = Array(s), k = 0, i = 0; i < il; i++)\r\n for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)\r\n r[k] = a[j];\r\n return r;\r\n}\r\n\r\nexport function __spreadArray(to, from, pack) {\r\n if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {\r\n if (ar || !(i in from)) {\r\n if (!ar) ar = Array.prototype.slice.call(from, 0, i);\r\n ar[i] = from[i];\r\n }\r\n }\r\n return to.concat(ar || Array.prototype.slice.call(from));\r\n}\r\n\r\nexport function __await(v) {\r\n return this instanceof __await ? (this.v = v, this) : new __await(v);\r\n}\r\n\r\nexport function __asyncGenerator(thisArg, _arguments, generator) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var g = generator.apply(thisArg, _arguments || []), i, q = [];\r\n return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\r\n function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\r\n function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\r\n function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n function fulfill(value) { resume(\"next\", value); }\r\n function reject(value) { resume(\"throw\", value); }\r\n function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n var i, p;\r\n return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var m = o[Symbol.asyncIterator], i;\r\n return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n return cooked;\r\n};\r\n\r\nvar __setModuleDefault = Object.create ? (function(o, v) {\r\n Object.defineProperty(o, \"default\", { enumerable: true, value: v });\r\n}) : function(o, v) {\r\n o[\"default\"] = v;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n if (mod && mod.__esModule) return mod;\r\n var result = {};\r\n if (mod != null) for (var k in mod) if (k !== \"default\" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);\r\n __setModuleDefault(result, mod);\r\n return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n\r\nexport function __classPrivateFieldGet(receiver, state, kind, f) {\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a getter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot read private member from an object whose class did not declare it\");\r\n return kind === \"m\" ? f : kind === \"a\" ? f.call(receiver) : f ? f.value : state.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, state, value, kind, f) {\r\n if (kind === \"m\") throw new TypeError(\"Private method is not writable\");\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a setter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot write private member to an object whose class did not declare it\");\r\n return (kind === \"a\" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;\r\n}\r\n\r\nexport function __classPrivateFieldIn(state, receiver) {\r\n if (receiver === null || (typeof receiver !== \"object\" && typeof receiver !== \"function\")) throw new TypeError(\"Cannot use 'in' operator on non-object\");\r\n return typeof state === \"function\" ? receiver === state : state.has(receiver);\r\n}\r\n\r\nexport function __addDisposableResource(env, value, async) {\r\n if (value !== null && value !== void 0) {\r\n if (typeof value !== \"object\" && typeof value !== \"function\") throw new TypeError(\"Object expected.\");\r\n var dispose;\r\n if (async) {\r\n if (!Symbol.asyncDispose) throw new TypeError(\"Symbol.asyncDispose is not defined.\");\r\n dispose = value[Symbol.asyncDispose];\r\n }\r\n if (dispose === void 0) {\r\n if (!Symbol.dispose) throw new TypeError(\"Symbol.dispose is not defined.\");\r\n dispose = value[Symbol.dispose];\r\n }\r\n if (typeof dispose !== \"function\") throw new TypeError(\"Object not disposable.\");\r\n env.stack.push({ value: value, dispose: dispose, async: async });\r\n }\r\n else if (async) {\r\n env.stack.push({ async: true });\r\n }\r\n return value;\r\n}\r\n\r\nvar _SuppressedError = typeof SuppressedError === \"function\" ? SuppressedError : function (error, suppressed, message) {\r\n var e = new Error(message);\r\n return e.name = \"SuppressedError\", e.error = error, e.suppressed = suppressed, e;\r\n};\r\n\r\nexport function __disposeResources(env) {\r\n function fail(e) {\r\n env.error = env.hasError ? new _SuppressedError(e, env.error, \"An error was suppressed during disposal.\") : e;\r\n env.hasError = true;\r\n }\r\n function next() {\r\n while (env.stack.length) {\r\n var rec = env.stack.pop();\r\n try {\r\n var result = rec.dispose && rec.dispose.call(rec.value);\r\n if (rec.async) return Promise.resolve(result).then(next, function(e) { fail(e); return next(); });\r\n }\r\n catch (e) {\r\n fail(e);\r\n }\r\n }\r\n if (env.hasError) throw env.error;\r\n }\r\n return next();\r\n}\r\n\r\nexport default {\r\n __extends: __extends,\r\n __assign: __assign,\r\n __rest: __rest,\r\n __decorate: __decorate,\r\n __param: __param,\r\n __metadata: __metadata,\r\n __awaiter: __awaiter,\r\n __generator: __generator,\r\n __createBinding: __createBinding,\r\n __exportStar: __exportStar,\r\n __values: __values,\r\n __read: __read,\r\n __spread: __spread,\r\n __spreadArrays: __spreadArrays,\r\n __spreadArray: __spreadArray,\r\n __await: __await,\r\n __asyncGenerator: __asyncGenerator,\r\n __asyncDelegator: __asyncDelegator,\r\n __asyncValues: __asyncValues,\r\n __makeTemplateObject: __makeTemplateObject,\r\n __importStar: __importStar,\r\n __importDefault: __importDefault,\r\n __classPrivateFieldGet: __classPrivateFieldGet,\r\n __classPrivateFieldSet: __classPrivateFieldSet,\r\n __classPrivateFieldIn: __classPrivateFieldIn,\r\n __addDisposableResource: __addDisposableResource,\r\n __disposeResources: __disposeResources,\r\n};\r\n","import { reflectCall } from 'lib/helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport assert from '../../stub/assert';\n\ndeclare global {\n interface ArrayBuffer {\n readonly detached: boolean;\n\n transfer(): ArrayBuffer;\n }\n\n function structuredClone(value: T, options: { transfer: ArrayBuffer[] }): T;\n}\n\nexport function CreateArrayFromList(elements: T): T {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice() as T;\n}\n\nexport function CopyDataBlockBytes(dest: ArrayBuffer,\n destOffset: number,\n src: ArrayBuffer,\n srcOffset: number,\n n: number) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n\nexport let TransferArrayBuffer = (O: ArrayBuffer): ArrayBuffer => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n } else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n } else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n};\n\nexport function CanTransferArrayBuffer(O: ArrayBuffer): boolean {\n return !IsDetachedBuffer(O);\n}\n\nexport let IsDetachedBuffer = (O: ArrayBuffer): boolean => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n } else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n};\n\nexport function ArrayBufferSlice(buffer: ArrayBuffer, begin: number, end: number): ArrayBuffer {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n}\n\nexport type MethodName = {\n [P in keyof T]: T[P] extends Function | undefined ? P : never;\n}[keyof T];\n\nexport function GetMethod>(receiver: T, prop: K): T[K] | undefined {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n}\n\nexport interface SyncIteratorRecord {\n iterator: Iterator,\n nextMethod: Iterator['next'],\n done: boolean;\n}\n\nexport interface AsyncIteratorRecord {\n iterator: AsyncIterator,\n nextMethod: AsyncIterator['next'],\n done: boolean;\n}\n\nexport type SyncOrAsyncIteratorRecord = SyncIteratorRecord | AsyncIteratorRecord;\n\nexport function CreateAsyncFromSyncIterator(syncIteratorRecord: SyncIteratorRecord): AsyncIteratorRecord {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n}\n\n// Aligns with core-js/modules/es.symbol.async-iterator.js\nexport const SymbolAsyncIterator: (typeof Symbol)['asyncIterator'] =\n Symbol.asyncIterator ??\n Symbol.for?.('Symbol.asyncIterator') ??\n '@@asyncIterator';\n\nexport type SyncOrAsyncIterable = Iterable | AsyncIterable;\nexport type SyncOrAsyncIteratorMethod = () => (Iterator | AsyncIterator);\n\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint: 'async',\n method?: SyncOrAsyncIteratorMethod\n): AsyncIteratorRecord;\nfunction GetIterator(\n obj: Iterable,\n hint: 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncIteratorRecord;\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint = 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncOrAsyncIteratorRecord {\n assert(hint === 'sync' || hint === 'async');\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj as AsyncIterable, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj as Iterable, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj as Iterable, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n } else {\n method = GetMethod(obj as Iterable, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false } as SyncOrAsyncIteratorRecord;\n}\n\nexport { GetIterator };\n\nexport function IteratorNext(iteratorRecord: AsyncIteratorRecord): Promise> {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n}\n\nexport function IteratorComplete(\n iterResult: IteratorResult\n): iterResult is IteratorReturnResult {\n assert(typeIsObject(iterResult));\n return Boolean(iterResult.done);\n}\n\nexport function IteratorValue(iterResult: IteratorYieldResult): T {\n assert(typeIsObject(iterResult));\n return iterResult.value;\n}\n","/// \n\nimport { SymbolAsyncIterator } from '../../../lib/abstract-ops/ecmascript';\n\n// We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it.\nexport const AsyncIteratorPrototype: AsyncIterable = {\n // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( )\n // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator\n [SymbolAsyncIterator](this: AsyncIterator) {\n return this;\n }\n};\nObject.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false });\n","/// \n\nimport { ReadableStream } from '../readable-stream';\nimport {\n AcquireReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadableStreamDefaultReadResult,\n type ReadRequest\n} from './default-reader';\nimport { ReadableStreamReaderGenericCancel, ReadableStreamReaderGenericRelease } from './generic-reader';\nimport assert from '../../stub/assert';\nimport { AsyncIteratorPrototype } from '@@target/stub/async-iterator-prototype';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n queueMicrotask,\n transformPromiseWith\n} from '../helpers/webidl';\n\n/**\n * An async iterator returned by {@link ReadableStream.values}.\n *\n * @public\n */\nexport interface ReadableStreamAsyncIterator extends AsyncIterableIterator {\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nexport class ReadableStreamAsyncIteratorImpl {\n private readonly _reader: ReadableStreamDefaultReader;\n private readonly _preventCancel: boolean;\n private _ongoingPromise: Promise> | undefined = undefined;\n private _isFinished = false;\n\n constructor(reader: ReadableStreamDefaultReader, preventCancel: boolean) {\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n\n next(): Promise> {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n\n return(value: any): Promise> {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n\n private _nextSteps(): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n\n private _returnSteps(value: any): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n assert(reader._readRequests.length === 0);\n\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n}\n\ninterface ReadableStreamAsyncIteratorInstance extends ReadableStreamAsyncIterator {\n /** @interal */\n _asyncIteratorImpl: ReadableStreamAsyncIteratorImpl;\n\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nconst ReadableStreamAsyncIteratorPrototype: ReadableStreamAsyncIteratorInstance = {\n next(this: ReadableStreamAsyncIteratorInstance): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n\n return(this: ReadableStreamAsyncIteratorInstance, value: any): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n} as any;\nObject.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamAsyncIterator(stream: ReadableStream,\n preventCancel: boolean): ReadableStreamAsyncIterator {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator: ReadableStreamAsyncIteratorInstance = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n}\n\nfunction IsReadableStreamAsyncIterator(x: any): x is ReadableStreamAsyncIterator {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n\n try {\n // noinspection SuspiciousTypeOfGuard\n return (x as ReadableStreamAsyncIteratorInstance)._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n } catch {\n return false;\n }\n}\n\n// Helper functions for the ReadableStream.\n\nfunction streamAsyncIteratorBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN: typeof Number.isNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n};\n\nexport default NumberIsNaN;\n","import NumberIsNaN from '../../stub/number-isnan';\nimport { ArrayBufferSlice } from './ecmascript';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function IsNonNegativeNumber(v: number): boolean {\n if (typeof v !== 'number') {\n return false;\n }\n\n if (NumberIsNaN(v)) {\n return false;\n }\n\n if (v < 0) {\n return false;\n }\n\n return true;\n}\n\nexport function CloneAsUint8Array(O: NonShared): NonShared {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer) as NonShared;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsNonNegativeNumber } from './miscellaneous';\n\nexport interface QueueContainer {\n _queue: SimpleQueue;\n _queueTotalSize: number;\n}\n\nexport interface QueuePair {\n value: T;\n size: number;\n}\n\nexport function DequeueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.shift()!;\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n\n return pair.value;\n}\n\nexport function EnqueueValueWithSize(container: QueueContainer>, value: T, size: number) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n}\n\nexport function PeekQueueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.peek();\n return pair.value;\n}\n\nexport function ResetQueue(container: QueueContainer) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n}\n","export type TypedArray =\n | Int8Array\n | Uint8Array\n | Uint8ClampedArray\n | Int16Array\n | Uint16Array\n | Int32Array\n | Uint32Array\n | Float32Array\n | Float64Array;\n\nexport type NonShared = T & {\n buffer: ArrayBuffer;\n}\n\nexport interface ArrayBufferViewConstructor {\n new(buffer: ArrayBuffer, byteOffset: number, length?: number): T;\n\n readonly prototype: T;\n}\n\nexport interface TypedArrayConstructor extends ArrayBufferViewConstructor {\n readonly BYTES_PER_ELEMENT: number;\n}\n\nexport type DataViewConstructor = ArrayBufferViewConstructor;\n\nfunction isDataViewConstructor(ctor: Function): ctor is DataViewConstructor {\n return ctor === DataView;\n}\n\nexport function isDataView(view: ArrayBufferView): view is DataView {\n return isDataViewConstructor(view.constructor);\n}\n\nexport function arrayBufferViewElementSize(ctor: ArrayBufferViewConstructor): number {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return (ctor as unknown as TypedArrayConstructor).BYTES_PER_ELEMENT;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n IsReadableStreamDefaultReader,\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n ReadableStreamHasDefaultReader,\n type ReadRequest\n} from './default-reader';\nimport {\n ReadableStreamAddReadIntoRequest,\n ReadableStreamFulfillReadIntoRequest,\n ReadableStreamGetNumReadIntoRequests,\n ReadableStreamHasBYOBReader,\n type ReadIntoRequest\n} from './byob-reader';\nimport NumberIsInteger from '../../stub/number-isinteger';\nimport {\n IsReadableStreamLocked,\n type ReadableByteStream,\n ReadableStreamClose,\n ReadableStreamError\n} from '../readable-stream';\nimport type { ValidatedUnderlyingByteSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport {\n ArrayBufferSlice,\n CanTransferArrayBuffer,\n CopyDataBlockBytes,\n IsDetachedBuffer,\n TransferArrayBuffer\n} from '../abstract-ops/ecmascript';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\nimport { assertRequiredArgument, convertUnsignedLongLongWithEnforceRange } from '../validators/basic';\nimport {\n type ArrayBufferViewConstructor,\n arrayBufferViewElementSize,\n type NonShared,\n type TypedArrayConstructor\n} from '../helpers/array-buffer-view';\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nexport class ReadableStreamBYOBRequest {\n /** @internal */\n _associatedReadableByteStreamController!: ReadableByteStreamController;\n /** @internal */\n _view!: NonShared | null;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view(): ArrayBufferView | null {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n\n return this._view;\n }\n\n /**\n * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into\n * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer.\n *\n * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer\n * modifiable.\n */\n respond(bytesWritten: number): void;\n respond(bytesWritten: number | undefined): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(this._view!.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n\n assert(this._view!.byteLength > 0);\n assert(this._view!.buffer.byteLength > 0);\n\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n\n /**\n * Indicates to the associated readable byte stream that instead of writing into\n * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`,\n * which will be given to the consumer of the readable byte stream.\n *\n * After this method is called, `view` will be transferred and no longer modifiable.\n */\n respondWithNewView(view: ArrayBufferView): void;\n respondWithNewView(view: NonShared): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n}\n\ninterface ByteQueueElement {\n buffer: ArrayBuffer;\n byteOffset: number;\n byteLength: number;\n}\n\ntype PullIntoDescriptor = NonShared> =\n DefaultPullIntoDescriptor\n | BYOBPullIntoDescriptor;\n\ninterface DefaultPullIntoDescriptor {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: TypedArrayConstructor;\n readerType: 'default' | 'none';\n}\n\ninterface BYOBPullIntoDescriptor = NonShared> {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: ArrayBufferViewConstructor;\n readerType: 'byob' | 'none';\n}\n\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableByteStreamController {\n /** @internal */\n _controlledReadableByteStream!: ReadableByteStream;\n /** @internal */\n _queue!: SimpleQueue;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n /** @internal */\n _autoAllocateChunkSize: number | undefined;\n /** @internal */\n _byobRequest: ReadableStreamBYOBRequest | null;\n /** @internal */\n _pendingPullIntos!: SimpleQueue;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest(): ReadableStreamBYOBRequest | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n\n ReadableByteStreamControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk chunk in the controlled readable stream.\n * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown.\n */\n enqueue(chunk: ArrayBufferView): void;\n enqueue(chunk: NonShared): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n\n ReadableByteStreamControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n\n ResetQueue(this);\n\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest>): void {\n const stream = this._controlledReadableByteStream;\n assert(ReadableStreamHasDefaultReader(stream));\n\n if (this._queueTotalSize > 0) {\n assert(ReadableStreamGetNumReadRequests(stream) === 0);\n\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer: ArrayBuffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n } catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n\n const pullIntoDescriptor: DefaultPullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n}\n\nObject.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableByteStreamController.prototype.close, 'close');\nsetFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableByteStreamController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableByteStreamController.\n\nexport function IsReadableByteStreamController(x: any): x is ReadableByteStreamController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n\n return x instanceof ReadableByteStreamController;\n}\n\nfunction IsReadableStreamBYOBRequest(x: any): x is ReadableStreamBYOBRequest {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBRequest;\n}\n\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller: ReadableByteStreamController): void {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller: ReadableByteStreamController) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n}\n\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor>(\n stream: ReadableByteStream,\n pullIntoDescriptor: PullIntoDescriptor\n) {\n assert(stream._state !== 'errored');\n assert(pullIntoDescriptor.readerType !== 'none');\n\n let done = false;\n if (stream._state === 'closed') {\n assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);\n done = true;\n }\n\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView as unknown as NonShared, done);\n } else {\n assert(pullIntoDescriptor.readerType === 'byob');\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n}\n\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor>(\n pullIntoDescriptor: PullIntoDescriptor\n): T {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n\n assert(bytesFilled <= pullIntoDescriptor.byteLength);\n assert(bytesFilled % elementSize === 0);\n\n return new pullIntoDescriptor.viewConstructor(\n pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize) as T;\n}\n\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n}\n\nfunction ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n } catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n}\n\nfunction ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.readerType === 'none');\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n firstDescriptor.buffer,\n firstDescriptor.byteOffset,\n firstDescriptor.bytesFilled\n );\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n}\n\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller: ReadableByteStreamController,\n pullIntoDescriptor: PullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize,\n pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n\n const queue = controller._queue;\n\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n } else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n\n if (!ready) {\n assert(controller._queueTotalSize === 0);\n assert(pullIntoDescriptor.bytesFilled > 0);\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n }\n\n return ready;\n}\n\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller: ReadableByteStreamController,\n size: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);\n assert(controller._byobRequest === null);\n pullIntoDescriptor.bytesFilled += size;\n}\n\nfunction ReadableByteStreamControllerHandleQueueDrain(controller: ReadableByteStreamController) {\n assert(controller._controlledReadableByteStream._state === 'readable');\n\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n } else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n}\n\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller: ReadableByteStreamController) {\n if (controller._byobRequest === null) {\n return;\n }\n\n controller._byobRequest._associatedReadableByteStreamController = undefined!;\n controller._byobRequest._view = null!;\n controller._byobRequest = null;\n}\n\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller: ReadableByteStreamController) {\n assert(!controller._closeRequested);\n\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n assert(pullIntoDescriptor.readerType !== 'none');\n\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n ReadableByteStreamControllerCommitPullIntoDescriptor(\n controller._controlledReadableByteStream,\n pullIntoDescriptor\n );\n }\n }\n}\n\nfunction ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller: ReadableByteStreamController) {\n const reader = controller._controlledReadableByteStream._reader;\n assert(IsReadableStreamDefaultReader(reader));\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n}\n\nexport function ReadableByteStreamControllerPullInto>(\n controller: ReadableByteStreamController,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = controller._controlledReadableByteStream;\n\n const ctor = view.constructor as ArrayBufferViewConstructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n\n const { byteOffset, byteLength } = view;\n\n const minimumFill = min * elementSize;\n assert(minimumFill >= elementSize && minimumFill <= byteLength);\n assert(minimumFill % elementSize === 0);\n\n let buffer: ArrayBuffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n } catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n\n const pullIntoDescriptor: BYOBPullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInClosedState(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.bytesFilled % firstDescriptor.elementSize === 0);\n\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n}\n\nfunction ReadableByteStreamControllerRespondInReadableState(controller: ReadableByteStreamController,\n bytesWritten: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n pullIntoDescriptor.buffer,\n end - remainderSize,\n remainderSize\n );\n }\n\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInternal(controller: ReadableByteStreamController, bytesWritten: number) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n assert(CanTransferArrayBuffer(firstDescriptor.buffer));\n\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n assert(bytesWritten === 0);\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n } else {\n assert(state === 'readable');\n assert(bytesWritten > 0);\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerShiftPendingPullInto(\n controller: ReadableByteStreamController\n): PullIntoDescriptor {\n assert(controller._byobRequest === null);\n const descriptor = controller._pendingPullIntos.shift()!;\n return descriptor;\n}\n\nfunction ReadableByteStreamControllerShouldCallPull(controller: ReadableByteStreamController): boolean {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return false;\n }\n\n if (controller._closeRequested) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableByteStreamControllerClearAlgorithms(controller: ReadableByteStreamController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\n\nexport function ReadableByteStreamControllerClose(controller: ReadableByteStreamController) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n\n return;\n }\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n throw e;\n }\n }\n\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n}\n\nexport function ReadableByteStreamControllerEnqueue(\n controller: ReadableByteStreamController,\n chunk: NonShared\n) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError(\n 'The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk'\n );\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n assert(controller._pendingPullIntos.length === 0);\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n } else {\n assert(controller._queue.length === 0);\n if (controller._pendingPullIntos.length > 0) {\n assert(controller._pendingPullIntos.peek().readerType === 'default');\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView as NonShared, false);\n }\n } else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n } else {\n assert(!IsReadableStreamLocked(stream));\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableByteStreamControllerError(controller: ReadableByteStreamController, e: any) {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableByteStreamControllerFillReadRequestFromQueue(\n controller: ReadableByteStreamController,\n readRequest: ReadRequest>\n) {\n assert(controller._queueTotalSize > 0);\n\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view as NonShared);\n}\n\nexport function ReadableByteStreamControllerGetBYOBRequest(\n controller: ReadableByteStreamController\n): ReadableStreamBYOBRequest | null {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer,\n firstDescriptor.byteOffset + firstDescriptor.bytesFilled,\n firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n\n const byobRequest: ReadableStreamBYOBRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view as NonShared);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n}\n\nfunction ReadableByteStreamControllerGetDesiredSize(controller: ReadableByteStreamController): number | null {\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nexport function ReadableByteStreamControllerRespond(controller: ReadableByteStreamController, bytesWritten: number) {\n assert(controller._pendingPullIntos.length > 0);\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n}\n\nexport function ReadableByteStreamControllerRespondWithNewView(controller: ReadableByteStreamController,\n view: NonShared) {\n assert(controller._pendingPullIntos.length > 0);\n assert(!IsDetachedBuffer(view.buffer));\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (view.byteLength === 0) {\n throw new TypeError(\n 'The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'\n );\n }\n }\n\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n}\n\nexport function SetUpReadableByteStreamController(stream: ReadableByteStream,\n controller: ReadableByteStreamController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n autoAllocateChunkSize: number | undefined) {\n assert(stream._readableStreamController === undefined);\n if (autoAllocateChunkSize !== undefined) {\n assert(NumberIsInteger(autoAllocateChunkSize));\n assert(autoAllocateChunkSize > 0);\n }\n\n controller._controlledReadableByteStream = stream;\n\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._byobRequest = null;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._closeRequested = false;\n controller._started = false;\n\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n\n controller._pendingPullIntos = new SimpleQueue();\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableByteStreamControllerFromUnderlyingSource(\n stream: ReadableByteStream,\n underlyingByteSource: ValidatedUnderlyingByteSource,\n highWaterMark: number\n) {\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n\n SetUpReadableByteStreamController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize\n );\n}\n\nfunction SetUpReadableStreamBYOBRequest(request: ReadableStreamBYOBRequest,\n controller: ReadableByteStreamController,\n view: NonShared) {\n assert(IsReadableByteStreamController(controller));\n assert(typeof view === 'object');\n assert(ArrayBuffer.isView(view));\n assert(!IsDetachedBuffer(view.buffer));\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n}\n\n// Helper functions for the ReadableStreamBYOBRequest.\n\nfunction byobRequestBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n}\n\n// Helper functions for the ReadableByteStreamController.\n\nfunction byteStreamControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, type ReadableByteStream, type ReadableStream } from '../readable-stream';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamController,\n ReadableByteStreamControllerPullInto\n} from './byte-stream-controller';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\nimport { IsDetachedBuffer } from '../abstract-ops/ecmascript';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from './reader-options';\nimport { convertByobReadOptions } from '../validators/reader-options';\nimport { isDataView, type NonShared, type TypedArray } from '../helpers/array-buffer-view';\n\n/**\n * A result returned by {@link ReadableStreamBYOBReader.read}.\n *\n * @public\n */\nexport type ReadableStreamBYOBReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value: T | undefined;\n};\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamBYOBReader(stream: ReadableByteStream): ReadableStreamBYOBReader {\n return new ReadableStreamBYOBReader(stream as ReadableStream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadIntoRequest>(\n stream: ReadableByteStream,\n readIntoRequest: ReadIntoRequest\n): void {\n assert(IsReadableStreamBYOBReader(stream._reader));\n assert(stream._state === 'readable' || stream._state === 'closed');\n\n (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);\n}\n\nexport function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,\n chunk: ArrayBufferView,\n done: boolean) {\n const reader = stream._reader as ReadableStreamBYOBReader;\n\n assert(reader._readIntoRequests.length > 0);\n\n const readIntoRequest = reader._readIntoRequests.shift()!;\n if (done) {\n readIntoRequest._closeSteps(chunk);\n } else {\n readIntoRequest._chunkSteps(chunk);\n }\n}\n\nexport function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {\n return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;\n}\n\nexport function ReadableStreamHasBYOBReader(stream: ReadableByteStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadIntoRequest> {\n _chunkSteps(chunk: T): void;\n\n _closeSteps(chunk: T | undefined): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamBYOBReader {\n /** @internal */\n _ownerReadableStream!: ReadableByteStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readIntoRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readIntoRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Attempts to reads bytes into view, and returns a promise resolved with the result.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(\n view: T,\n options?: ReadableStreamBYOBReaderReadOptions\n ): Promise>;\n read>(\n view: T,\n rawOptions: ReadableStreamBYOBReaderReadOptions | null | undefined = {}\n ): Promise> {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n\n let options: ValidatedReadableStreamBYOBReaderReadOptions;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > (view as unknown as TypedArray).length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n } else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamBYOBReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest: ReadIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamBYOBReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBReader;\n}\n\nexport function ReadableStreamBYOBReaderRead>(\n reader: ReadableStreamBYOBReader,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n } else {\n ReadableByteStreamControllerPullInto(\n stream._readableStreamController as ReadableByteStreamController,\n view,\n min,\n readIntoRequest\n );\n }\n}\n\nexport function ReadableStreamBYOBReaderRelease(reader: ReadableStreamBYOBReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n}\n\nexport function ReadableStreamBYOBReaderErrorReadIntoRequests(reader: ReadableStreamBYOBReader, e: any) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamBYOBReader.\n\nfunction byobReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n}\n","import { assertDictionary, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from '../readable-stream/reader-options';\n\nexport function convertReaderOptions(options: ReadableStreamGetReaderOptions | null | undefined,\n context: string): ReadableStreamGetReaderOptions {\n assertDictionary(options, context);\n const mode = options?.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n}\n\nfunction convertReadableStreamReaderMode(mode: string, context: string): 'byob' {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n}\n\nexport function convertByobReadOptions(\n options: ReadableStreamBYOBReaderReadOptions | null | undefined,\n context: string\n): ValidatedReadableStreamBYOBReaderReadOptions {\n assertDictionary(options, context);\n const min = options?.min ?? 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(\n min,\n `${context} has member 'min' that`\n )\n };\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport NumberIsNaN from '../../stub/number-isnan';\n\nexport function ExtractHighWaterMark(strategy: QueuingStrategy, defaultHWM: number): number {\n const { highWaterMark } = strategy;\n\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n\n return highWaterMark;\n}\n\nexport function ExtractSizeAlgorithm(strategy: QueuingStrategy): QueuingStrategySizeCallback {\n const { size } = strategy;\n\n if (!size) {\n return () => 1;\n }\n\n return size;\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport { assertDictionary, assertFunction, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategy(init: QueuingStrategy | null | undefined,\n context: string): QueuingStrategy {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n const size = init?.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n}\n\nfunction convertQueuingStrategySize(fn: QueuingStrategySizeCallback,\n context: string): QueuingStrategySizeCallback {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from '../writable-stream/underlying-sink';\nimport { WritableStreamDefaultController } from '../writable-stream';\n\nexport function convertUnderlyingSink(original: UnderlyingSink | null,\n context: string): ValidatedUnderlyingSink {\n assertDictionary(original, context);\n const abort = original?.abort;\n const close = original?.close;\n const start = original?.start;\n const type = original?.type;\n const write = original?.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original!, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original!, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original!, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original!, `${context} has member 'write' that`),\n type\n };\n}\n\nfunction convertUnderlyingSinkAbortCallback(\n fn: UnderlyingSinkAbortCallback,\n original: UnderlyingSink,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSinkCloseCallback(\n fn: UnderlyingSinkCloseCallback,\n original: UnderlyingSink,\n context: string\n): () => Promise {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n}\n\nfunction convertUnderlyingSinkStartCallback(\n fn: UnderlyingSinkStartCallback,\n original: UnderlyingSink,\n context: string\n): UnderlyingSinkStartCallback {\n assertFunction(fn, context);\n return (controller: WritableStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSinkWriteCallback(\n fn: UnderlyingSinkWriteCallback,\n original: UnderlyingSink,\n context: string\n): (chunk: W, controller: WritableStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: W, controller: WritableStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n","import { IsWritableStream, WritableStream } from '../writable-stream';\n\nexport function assertWritableStream(x: unknown, context: string): asserts x is WritableStream {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n}\n","/**\n * A signal object that allows you to communicate with a request and abort it if required\n * via its associated `AbortController` object.\n *\n * @remarks\n * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @public\n */\nexport interface AbortSignal {\n /**\n * Whether the request is aborted.\n */\n readonly aborted: boolean;\n\n /**\n * If aborted, returns the reason for aborting.\n */\n readonly reason?: any;\n\n /**\n * Add an event listener to be triggered when this signal becomes aborted.\n */\n addEventListener(type: 'abort', listener: () => void): void;\n\n /**\n * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}.\n */\n removeEventListener(type: 'abort', listener: () => void): void;\n}\n\nexport function isAbortSignal(value: unknown): value is AbortSignal {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof (value as AbortSignal).aborted === 'boolean';\n } catch {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n}\n\n/**\n * A controller object that allows you to abort an `AbortSignal` when desired.\n *\n * @remarks\n * This interface is compatible with the `AbortController` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @internal\n */\nexport interface AbortController {\n readonly signal: AbortSignal;\n\n abort(reason?: any): void;\n}\n\ninterface AbortControllerConstructor {\n new(): AbortController;\n}\n\nconst supportsAbortController = typeof (AbortController as any) === 'function';\n\n/**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\nexport function createAbortController(): AbortController | undefined {\n if (supportsAbortController) {\n return new (AbortController as AbortControllerConstructor)();\n }\n return undefined;\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponPromise\n} from './helpers/webidl';\nimport {\n DequeueValue,\n EnqueueValueWithSize,\n PeekQueueValue,\n type QueuePair,\n ResetQueue\n} from './abstract-ops/queue-with-sizes';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { SimpleQueue } from './simple-queue';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { AbortSteps, ErrorSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from './writable-stream/underlying-sink';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertUnderlyingSink } from './validators/underlying-sink';\nimport { assertWritableStream } from './validators/writable-stream';\nimport { type AbortController, type AbortSignal, createAbortController } from './abort-signal';\n\ntype WritableStreamState = 'writable' | 'closed' | 'erroring' | 'errored';\n\ninterface WriteOrCloseRequest {\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n}\n\ntype WriteRequest = WriteOrCloseRequest;\ntype CloseRequest = WriteOrCloseRequest;\n\ninterface PendingAbortRequest {\n _promise: Promise;\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n _reason: any;\n _wasAlreadyErroring: boolean;\n}\n\n/**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\nclass WritableStream {\n /** @internal */\n _state!: WritableStreamState;\n /** @internal */\n _storedError: any;\n /** @internal */\n _writer: WritableStreamDefaultWriter | undefined;\n /** @internal */\n _writableStreamController!: WritableStreamDefaultController;\n /** @internal */\n _writeRequests!: SimpleQueue;\n /** @internal */\n _inFlightWriteRequest: WriteRequest | undefined;\n /** @internal */\n _closeRequest: CloseRequest | undefined;\n /** @internal */\n _inFlightCloseRequest: CloseRequest | undefined;\n /** @internal */\n _pendingAbortRequest: PendingAbortRequest | undefined;\n /** @internal */\n _backpressure!: boolean;\n\n constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSink: UnderlyingSink | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n } else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n\n InitializeWritableStream(this);\n\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked(): boolean {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsWritableStreamLocked(this);\n }\n\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('abort'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n\n return WritableStreamAbort(this, reason);\n }\n\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('close'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamClose(this);\n }\n\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter(): WritableStreamDefaultWriter {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('getWriter');\n }\n\n return AcquireWritableStreamDefaultWriter(this);\n }\n}\n\nObject.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(WritableStream.prototype.abort, 'abort');\nsetFunctionName(WritableStream.prototype.close, 'close');\nsetFunctionName(WritableStream.prototype.getWriter, 'getWriter');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n}\n\nexport {\n AcquireWritableStreamDefaultWriter,\n CreateWritableStream,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamDefaultControllerErrorIfNeeded,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite,\n WritableStreamCloseQueuedOrInFlight\n};\n\nexport type {\n UnderlyingSink,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkAbortCallback\n};\n\n// Abstract operations for the WritableStream.\n\nfunction AcquireWritableStreamDefaultWriter(stream: WritableStream): WritableStreamDefaultWriter {\n return new WritableStreamDefaultWriter(stream);\n}\n\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: WritableStream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n\n const controller: WritableStreamDefaultController = Object.create(WritableStreamDefaultController.prototype);\n\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm,\n abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n}\n\nfunction InitializeWritableStream(stream: WritableStream) {\n stream._state = 'writable';\n\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n\n stream._writer = undefined;\n\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined!;\n\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n}\n\nfunction IsWritableStream(x: unknown): x is WritableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n\n return x instanceof WritableStream;\n}\n\nfunction IsWritableStreamLocked(stream: WritableStream): boolean {\n assert(IsWritableStream(stream));\n\n if (stream._writer === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamAbort(stream: WritableStream, reason: any): Promise {\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n stream._writableStreamController._abortController?.abort(reason);\n\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state as WritableStreamState;\n\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined!,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest!._promise = promise;\n\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n\n return promise;\n}\n\nfunction WritableStreamClose(stream: WritableStream): Promise {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(\n `The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n\n assert(state === 'writable' || state === 'erroring');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const promise = newPromise((resolve, reject) => {\n const closeRequest: CloseRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._closeRequest = closeRequest;\n });\n\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n\n return promise;\n}\n\n// WritableStream API exposed for controllers.\n\nfunction WritableStreamAddWriteRequest(stream: WritableStream): Promise {\n assert(IsWritableStreamLocked(stream));\n assert(stream._state === 'writable');\n\n const promise = newPromise((resolve, reject) => {\n const writeRequest: WriteRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._writeRequests.push(writeRequest);\n });\n\n return promise;\n}\n\nfunction WritableStreamDealWithRejection(stream: WritableStream, error: any) {\n const state = stream._state;\n\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n\n assert(state === 'erroring');\n WritableStreamFinishErroring(stream);\n}\n\nfunction WritableStreamStartErroring(stream: WritableStream, reason: any) {\n assert(stream._storedError === undefined);\n assert(stream._state === 'writable');\n\n const controller = stream._writableStreamController;\n assert(controller !== undefined);\n\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n}\n\nfunction WritableStreamFinishErroring(stream: WritableStream) {\n assert(stream._state === 'erroring');\n assert(!WritableStreamHasOperationMarkedInFlight(stream));\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(\n promise,\n () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n },\n (reason: any) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n}\n\nfunction WritableStreamFinishInFlightWrite(stream: WritableStream) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n}\n\nfunction WritableStreamFinishInFlightWriteWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._reject(error);\n stream._inFlightWriteRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n WritableStreamDealWithRejection(stream, error);\n}\n\nfunction WritableStreamFinishInFlightClose(stream: WritableStream) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n\n const state = stream._state;\n\n assert(state === 'writable' || state === 'erroring');\n\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n\n stream._state = 'closed';\n\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n\n assert(stream._pendingAbortRequest === undefined);\n assert(stream._storedError === undefined);\n}\n\nfunction WritableStreamFinishInFlightCloseWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._reject(error);\n stream._inFlightCloseRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n}\n\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream: WritableStream): boolean {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamHasOperationMarkedInFlight(stream: WritableStream): boolean {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamMarkCloseRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightCloseRequest === undefined);\n assert(stream._closeRequest !== undefined);\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n}\n\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightWriteRequest === undefined);\n assert(stream._writeRequests.length !== 0);\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\n\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream: WritableStream) {\n assert(stream._state === 'errored');\n if (stream._closeRequest !== undefined) {\n assert(stream._inFlightCloseRequest === undefined);\n\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n}\n\nfunction WritableStreamUpdateBackpressure(stream: WritableStream, backpressure: boolean) {\n assert(stream._state === 'writable');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n } else {\n assert(!backpressure);\n\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n\n stream._backpressure = backpressure;\n}\n\n/**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\nexport class WritableStreamDefaultWriter {\n /** @internal */\n _ownerWritableStream: WritableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _closedPromiseState!: 'pending' | 'resolved' | 'rejected';\n /** @internal */\n _readyPromise!: Promise;\n /** @internal */\n _readyPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _readyPromise_reject?: (reason: any) => void;\n /** @internal */\n _readyPromiseState!: 'pending' | 'fulfilled' | 'rejected';\n\n constructor(stream: WritableStream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n\n this._ownerWritableStream = stream;\n stream._writer = this;\n\n const state = stream._state;\n\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n } else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n } else {\n assert(state === 'errored');\n\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize(): number | null {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n\n return this._readyPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamDefaultWriterClose(this);\n }\n\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock(): void {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return;\n }\n\n assert(stream._writer !== undefined);\n\n WritableStreamDefaultWriterRelease(this);\n }\n\n /**\n * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully,\n * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return\n * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes\n * errored before the writing process is initiated.\n *\n * Note that what \"success\" means is up to the underlying sink; it might indicate simply that the chunk has been\n * accepted, and not necessarily that it is safely saved to its ultimate destination.\n */\n write(chunk: W): Promise;\n write(chunk: W = undefined!): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n});\nsetFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\nsetFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\nsetFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\nsetFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n}\n\n// Abstract operations for the WritableStreamDefaultWriter.\n\nfunction IsWritableStreamDefaultWriter(x: any): x is WritableStreamDefaultWriter {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultWriter;\n}\n\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultWriterAbort(writer: WritableStreamDefaultWriter, reason: any) {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamAbort(stream, reason);\n}\n\nfunction WritableStreamDefaultWriterClose(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamClose(stream);\n}\n\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n return WritableStreamDefaultWriterClose(writer);\n}\n\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n } else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n } else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterGetDesiredSize(writer: WritableStreamDefaultWriter): number | null {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n\n if (state === 'closed') {\n return 0;\n }\n\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\n\nfunction WritableStreamDefaultWriterRelease(writer: WritableStreamDefaultWriter) {\n const stream = writer._ownerWritableStream;\n assert(stream !== undefined);\n assert(stream._writer === writer);\n\n const releasedError = new TypeError(\n `Writer was released and can no longer be used to monitor the stream's closedness`);\n\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n\n stream._writer = undefined;\n writer._ownerWritableStream = undefined!;\n}\n\nfunction WritableStreamDefaultWriterWrite(writer: WritableStreamDefaultWriter, chunk: W): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const controller = stream._writableStreamController;\n\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable');\n\n const promise = WritableStreamAddWriteRequest(stream);\n\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n\n return promise;\n}\n\nconst closeSentinel: unique symbol = {} as any;\n\ntype QueueRecord = W | typeof closeSentinel;\n\n/**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\nexport class WritableStreamDefaultController {\n /** @internal */\n _controlledWritableStream!: WritableStream;\n /** @internal */\n _queue!: SimpleQueue>>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _abortReason: any;\n /** @internal */\n _abortController: AbortController | undefined;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _writeAlgorithm!: (chunk: W) => Promise;\n /** @internal */\n _closeAlgorithm!: () => Promise;\n /** @internal */\n _abortAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason(): any {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('abortReason');\n }\n return this._abortReason;\n }\n\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal(): AbortSignal {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e: any = undefined): void {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n\n WritableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [AbortSteps](reason: any): Promise {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations implementing interface required by the WritableStream.\n\nfunction IsWritableStreamDefaultController(x: any): x is WritableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultController;\n}\n\nfunction SetUpWritableStreamDefaultController(stream: WritableStream,\n controller: WritableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(IsWritableStream(stream));\n assert(stream._writableStreamController === undefined);\n\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(\n startPromise,\n () => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n r => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n }\n );\n}\n\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream: WritableStream,\n underlyingSink: ValidatedUnderlyingSink,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let writeAlgorithm: (chunk: W) => Promise;\n let closeAlgorithm: () => Promise;\n let abortAlgorithm: (reason: any) => Promise;\n\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write!(chunk, controller);\n } else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close!();\n } else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort!(reason);\n } else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpWritableStreamDefaultController(\n stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\nfunction WritableStreamDefaultControllerClearAlgorithms(controller: WritableStreamDefaultController) {\n controller._writeAlgorithm = undefined!;\n controller._closeAlgorithm = undefined!;\n controller._abortAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\nfunction WritableStreamDefaultControllerClose(controller: WritableStreamDefaultController) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\nfunction WritableStreamDefaultControllerGetChunkSize(controller: WritableStreamDefaultController,\n chunk: W): number {\n try {\n return controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n}\n\nfunction WritableStreamDefaultControllerGetDesiredSize(controller: WritableStreamDefaultController): number {\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nfunction WritableStreamDefaultControllerWrite(controller: WritableStreamDefaultController,\n chunk: W,\n chunkSize: number) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\n// Abstract operations for the WritableStreamDefaultController.\n\nfunction WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n if (!controller._started) {\n return;\n }\n\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n\n const state = stream._state;\n assert(state !== 'closed' && state !== 'errored');\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n\n if (controller._queue.length === 0) {\n return;\n }\n\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n } else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n}\n\nfunction WritableStreamDefaultControllerErrorIfNeeded(controller: WritableStreamDefaultController, error: any) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n}\n\nfunction WritableStreamDefaultControllerProcessClose(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkCloseRequestInFlight(stream);\n\n DequeueValue(controller);\n assert(controller._queue.length === 0);\n\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(\n sinkClosePromise,\n () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n },\n reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerProcessWrite(controller: WritableStreamDefaultController, chunk: W) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(\n sinkWritePromise,\n () => {\n WritableStreamFinishInFlightWrite(stream);\n\n const state = stream._state;\n assert(state === 'writable' || state === 'erroring');\n\n DequeueValue(controller);\n\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerGetBackpressure(controller: WritableStreamDefaultController): boolean {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n}\n\n// A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultControllerError(controller: WritableStreamDefaultController, error: any) {\n const stream = controller._controlledWritableStream;\n\n assert(stream._state === 'writable');\n\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n}\n\n// Helper functions for the WritableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n}\n\n// Helper functions for the WritableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n}\n\n\n// Helper functions for the WritableStreamDefaultWriter.\n\nfunction defaultWriterBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n}\n\nfunction defaultWriterLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n}\n\nfunction defaultWriterClosedPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n}\n\nfunction defaultWriterClosedPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n}\n\nfunction defaultWriterClosedPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n}\n\nfunction defaultWriterClosedPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._closedPromise_resolve === undefined);\n assert(writer._closedPromise_reject === undefined);\n assert(writer._closedPromiseState !== 'pending');\n\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n}\n\nfunction defaultWriterReadyPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n}\n\nfunction defaultWriterReadyPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n}\n\nfunction defaultWriterReadyPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n}\n\nfunction defaultWriterReadyPromiseReset(writer: WritableStreamDefaultWriter) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitialize(writer);\n}\n\nfunction defaultWriterReadyPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n}\n","/// \n\nfunction getGlobals(): typeof globalThis | undefined {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n } else if (typeof self !== 'undefined') {\n return self;\n } else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n}\n\nexport const globals = getGlobals();\n","/// \nimport { globals } from '../globals';\nimport { setFunctionName } from '../lib/helpers/miscellaneous';\n\ninterface DOMException extends Error {\n name: string;\n message: string;\n}\n\ntype DOMExceptionConstructor = new (message?: string, name?: string) => DOMException;\n\nfunction isDOMExceptionConstructor(ctor: unknown): ctor is DOMExceptionConstructor {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if ((ctor as DOMExceptionConstructor).name !== 'DOMException') {\n return false;\n }\n try {\n new (ctor as DOMExceptionConstructor)();\n return true;\n } catch {\n return false;\n }\n}\n\n/**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\nfunction getFromGlobal(): DOMExceptionConstructor | undefined {\n const ctor = globals?.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n}\n\n/**\n * Support:\n * - All platforms\n */\nfunction createPolyfill(): DOMExceptionConstructor {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(this: DOMException, message?: string, name?: string) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n } as any;\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-redeclare\nconst DOMException: DOMExceptionConstructor = getFromGlobal() || createPolyfill();\n\nexport { DOMException };\n","import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';\nimport { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireWritableStreamDefaultWriter,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamCloseQueuedOrInFlight,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite\n} from '../writable-stream';\nimport assert from '../../stub/assert';\nimport {\n newPromise,\n PerformPromiseThen,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponFulfillment,\n uponPromise,\n uponRejection\n} from '../helpers/webidl';\nimport { noop } from '../../utils';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\nimport { DOMException } from '../../stub/dom-exception';\n\nexport function ReadableStreamPipeTo(source: ReadableStream,\n dest: WritableStream,\n preventClose: boolean,\n preventAbort: boolean,\n preventCancel: boolean,\n signal: AbortSignal | undefined): Promise {\n assert(IsReadableStream(source));\n assert(IsWritableStream(dest));\n assert(typeof preventClose === 'boolean');\n assert(typeof preventAbort === 'boolean');\n assert(typeof preventCancel === 'boolean');\n assert(signal === undefined || isAbortSignal(signal));\n assert(!IsReadableStreamLocked(source));\n assert(!IsWritableStreamLocked(dest));\n\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n\n source._disturbed = true;\n\n let shuttingDown = false;\n\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n\n return newPromise((resolve, reject) => {\n let abortAlgorithm: () => void;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions: Array<() => Promise> = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n\n signal.addEventListener('abort', abortAlgorithm);\n }\n\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done: boolean) {\n if (done) {\n resolveLoop();\n } else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n\n next(false);\n });\n }\n\n function pipeStep(): Promise {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(\n reader,\n {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n }\n );\n });\n });\n }\n\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n } else {\n shutdown();\n }\n return null;\n });\n\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n } else {\n shutdown(true, destClosed);\n }\n }\n\n setPromiseIsHandledToTrue(pipeLoop());\n\n function waitForWritesToFinish(): Promise {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(\n currentWrite,\n () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined\n );\n }\n\n function isOrBecomesErrored(stream: ReadableStream | WritableStream,\n promise: Promise,\n action: (reason: any) => null) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n } else {\n uponRejection(promise, action);\n }\n }\n\n function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise, action: () => null) {\n if (stream._state === 'closed') {\n action();\n } else {\n uponFulfillment(promise, action);\n }\n }\n\n function shutdownWithAction(action: () => Promise, originalIsError?: boolean, originalError?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n } else {\n doTheRest();\n }\n\n function doTheRest(): null {\n uponPromise(\n action(),\n () => finalize(originalIsError, originalError),\n newError => finalize(true, newError)\n );\n return null;\n }\n }\n\n function shutdown(isError?: boolean, error?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n } else {\n finalize(isError, error);\n }\n }\n\n function finalize(isError?: boolean, error?: any): null {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n } else {\n resolve(undefined);\n }\n\n return null;\n }\n });\n}\n","import type { QueuingStrategySizeCallback } from '../queuing-strategy';\nimport assert from '../../stub/assert';\nimport { DequeueValue, EnqueueValueWithSize, type QueuePair, ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n type ReadRequest\n} from './default-reader';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsReadableStreamLocked, ReadableStream, ReadableStreamClose, ReadableStreamError } from '../readable-stream';\nimport type { ValidatedUnderlyingSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\n\n/**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableStreamDefaultController {\n /** @internal */\n _controlledReadableStream!: ReadableStream;\n /** @internal */\n _queue!: SimpleQueue>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('close');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n\n ReadableStreamDefaultControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the controlled readable stream.\n */\n enqueue(chunk: R): void;\n enqueue(chunk: R = undefined!): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n ReadableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest): void {\n const stream = this._controlledReadableStream;\n\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n } else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n\n readRequest._chunkSteps(chunk);\n } else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n // Do nothing.\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\nsetFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableStreamDefaultController.\n\nfunction IsReadableStreamDefaultController(x: any): x is ReadableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultController;\n}\n\nfunction ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController): void {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController): boolean {\n const stream = controller._controlledReadableStream;\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\n// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n\nexport function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n controller._closeRequested = true;\n\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n}\n\nexport function ReadableStreamDefaultControllerEnqueue(\n controller: ReadableStreamDefaultController,\n chunk: R\n): void {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n } else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController, e: any) {\n const stream = controller._controlledReadableStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ResetQueue(controller);\n\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableStreamDefaultControllerGetDesiredSize(\n controller: ReadableStreamDefaultController\n): number | null {\n const state = controller._controlledReadableStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\n// This is used in the implementation of TransformStream.\nexport function ReadableStreamDefaultControllerHasBackpressure(\n controller: ReadableStreamDefaultController\n): boolean {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n\n return true;\n}\n\nexport function ReadableStreamDefaultControllerCanCloseOrEnqueue(\n controller: ReadableStreamDefaultController\n): boolean {\n const state = controller._controlledReadableStream._state;\n\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n\n return false;\n}\n\nexport function SetUpReadableStreamDefaultController(stream: ReadableStream,\n controller: ReadableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(stream._readableStreamController === undefined);\n\n controller._controlledReadableStream = stream;\n\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n stream: ReadableStream,\n underlyingSource: ValidatedUnderlyingSource,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback\n) {\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// Helper functions for the ReadableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n}\n","import {\n CreateReadableByteStream,\n CreateReadableStream,\n type DefaultReadableStream,\n IsReadableStream,\n type ReadableByteStream,\n ReadableStream,\n ReadableStreamCancel,\n type ReadableStreamReader\n} from '../readable-stream';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadRequest\n} from './default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReaderRead,\n type ReadIntoRequest\n} from './byob-reader';\nimport assert from '../../stub/assert';\nimport { newPromise, promiseResolvedWith, queueMicrotask, uponRejection } from '../helpers/webidl';\nimport {\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError\n} from './default-controller';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamControllerClose,\n ReadableByteStreamControllerEnqueue,\n ReadableByteStreamControllerError,\n ReadableByteStreamControllerGetBYOBRequest,\n ReadableByteStreamControllerRespond,\n ReadableByteStreamControllerRespondWithNewView\n} from './byte-stream-controller';\nimport { CreateArrayFromList } from '../abstract-ops/ecmascript';\nimport { CloneAsUint8Array } from '../abstract-ops/miscellaneous';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function ReadableStreamTee(stream: ReadableStream,\n cloneForBranch2: boolean): [ReadableStream, ReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream as unknown as ReadableByteStream) as\n unknown as [ReadableStream, ReadableStream];\n }\n return ReadableStreamDefaultTee(stream, cloneForBranch2);\n}\n\nexport function ReadableStreamDefaultTee(\n stream: ReadableStream,\n cloneForBranch2: boolean\n): [DefaultReadableStream, DefaultReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n\n const reader = AcquireReadableStreamDefaultReader(stream);\n\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: DefaultReadableStream;\n let branch2: DefaultReadableStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function pullAlgorithm(): Promise {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm() {\n // do nothing\n }\n\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n\n uponRejection(reader._closedPromise, (r: any) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n\n return [branch1, branch2];\n}\n\nexport function ReadableByteStreamTee(stream: ReadableByteStream): [ReadableByteStream, ReadableByteStream] {\n assert(IsReadableStream(stream));\n assert(IsReadableByteStreamController(stream._readableStreamController));\n\n let reader: ReadableStreamReader> = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: ReadableByteStream;\n let branch2: ReadableByteStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function forwardReaderError(thisReader: ReadableStreamReader>) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n assert(reader._readIntoRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n\n const readRequest: ReadRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n\n function pullWithBYOBReader(view: NonShared, forBranch2: boolean) {\n if (IsReadableStreamDefaultReader>(reader)) {\n assert(reader._readRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n\n const readIntoRequest: ReadIntoRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n } else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n\n if (chunk !== undefined) {\n assert(chunk.byteLength === 0);\n\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n\n function pull1Algorithm(): Promise {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, false);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function pull2Algorithm(): Promise {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, true);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm(): void {\n return;\n }\n\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n\n forwardReaderError(reader);\n\n return [branch1, branch2];\n}\n","import { CreateReadableStream, type DefaultReadableStream } from '../readable-stream';\nimport {\n isReadableStreamLike,\n type ReadableStreamDefaultReaderLike,\n type ReadableStreamLike\n} from './readable-stream-like';\nimport { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue } from './default-controller';\nimport { GetIterator, GetMethod, IteratorComplete, IteratorNext, IteratorValue } from '../abstract-ops/ecmascript';\nimport { promiseRejectedWith, promiseResolvedWith, reflectCall, transformPromiseWith } from '../helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport { noop } from '../../utils';\n\nexport function ReadableStreamFrom(\n source: Iterable | AsyncIterable | ReadableStreamLike\n): DefaultReadableStream {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n}\n\nexport function ReadableStreamFromIterable(asyncIterable: Iterable | AsyncIterable): DefaultReadableStream {\n let stream: DefaultReadableStream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n const iterator = iteratorRecord.iterator;\n let returnMethod: (typeof iterator)['return'] | undefined;\n try {\n returnMethod = GetMethod(iterator, 'return');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult: IteratorResult | Promise>;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n\nexport function ReadableStreamFromDefaultReader(\n reader: ReadableStreamDefaultReaderLike\n): DefaultReadableStream {\n let stream: DefaultReadableStream;\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let readPromise;\n try {\n readPromise = reader.read();\n } catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n } catch (e) {\n return promiseRejectedWith(e);\n }\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n","import { typeIsObject } from '../helpers/miscellaneous';\nimport type { ReadableStreamDefaultReadResult } from './default-reader';\n\n/**\n * A common interface for a `ReadadableStream` implementation.\n *\n * @public\n */\nexport interface ReadableStreamLike {\n readonly locked: boolean;\n\n getReader(): ReadableStreamDefaultReaderLike;\n}\n\n/**\n * A common interface for a `ReadableStreamDefaultReader` implementation.\n *\n * @public\n */\nexport interface ReadableStreamDefaultReaderLike {\n readonly closed: Promise;\n\n cancel(reason?: any): Promise;\n\n read(): Promise>;\n\n releaseLock(): void;\n}\n\nexport function isReadableStreamLike(stream: unknown): stream is ReadableStreamLike {\n return typeIsObject(stream) && typeof (stream as ReadableStreamLike).getReader !== 'undefined';\n}\n","import { assertDictionary, assertFunction, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamController,\n UnderlyingByteSource,\n UnderlyingDefaultOrByteSource,\n UnderlyingDefaultOrByteSourcePullCallback,\n UnderlyingDefaultOrByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n ValidatedUnderlyingDefaultOrByteSource\n} from '../readable-stream/underlying-source';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\n\nexport function convertUnderlyingDefaultOrByteSource(\n source: UnderlyingSource | UnderlyingByteSource | null,\n context: string\n): ValidatedUnderlyingDefaultOrByteSource {\n assertDictionary(source, context);\n const original = source as (UnderlyingDefaultOrByteSource | null);\n const autoAllocateChunkSize = original?.autoAllocateChunkSize;\n const cancel = original?.cancel;\n const pull = original?.pull;\n const start = original?.start;\n const type = original?.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(\n autoAllocateChunkSize,\n `${context} has member 'autoAllocateChunkSize' that`\n ),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original!, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original!, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n}\n\nfunction convertUnderlyingSourceCancelCallback(\n fn: UnderlyingSourceCancelCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSourcePullCallback(\n fn: UnderlyingDefaultOrByteSourcePullCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (controller: ReadableStreamController) => Promise {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSourceStartCallback(\n fn: UnderlyingDefaultOrByteSourceStartCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): UnderlyingDefaultOrByteSourceStartCallback {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertReadableStreamType(type: string, context: string): 'bytes' {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n}\n","import { assertDictionary } from './basic';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from '../readable-stream/pipe-options';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\n\nexport function convertPipeOptions(options: StreamPipeOptions | null | undefined,\n context: string): ValidatedStreamPipeOptions {\n assertDictionary(options, context);\n const preventAbort = options?.preventAbort;\n const preventCancel = options?.preventCancel;\n const preventClose = options?.preventClose;\n const signal = options?.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n}\n\nfunction assertAbortSignal(signal: unknown, context: string): asserts signal is AbortSignal {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n}\n","import assert from '../stub/assert';\nimport {\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith\n} from './helpers/webidl';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { AcquireReadableStreamAsyncIterator, type ReadableStreamAsyncIterator } from './readable-stream/async-iterator';\nimport { defaultReaderClosedPromiseReject, defaultReaderClosedPromiseResolve } from './readable-stream/generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderErrorReadRequests,\n type ReadableStreamDefaultReadResult\n} from './readable-stream/default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBReaderErrorReadIntoRequests,\n type ReadableStreamBYOBReadResult\n} from './readable-stream/byob-reader';\nimport { ReadableStreamPipeTo } from './readable-stream/pipe';\nimport { ReadableStreamTee } from './readable-stream/tee';\nimport { ReadableStreamFrom } from './readable-stream/from';\nimport { IsWritableStream, IsWritableStreamLocked, WritableStream } from './writable-stream';\nimport { SimpleQueue } from './simple-queue';\nimport {\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n SetUpReadableByteStreamController,\n SetUpReadableByteStreamControllerFromUnderlyingSource\n} from './readable-stream/byte-stream-controller';\nimport {\n ReadableStreamDefaultController,\n SetUpReadableStreamDefaultController,\n SetUpReadableStreamDefaultControllerFromUnderlyingSource\n} from './readable-stream/default-controller';\nimport type {\n UnderlyingByteSource,\n UnderlyingByteSourcePullCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceStartCallback\n} from './readable-stream/underlying-source';\nimport { noop } from '../utils';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { CreateArrayFromList, SymbolAsyncIterator } from './abstract-ops/ecmascript';\nimport { CancelSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertUnderlyingDefaultOrByteSource } from './validators/underlying-source';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions\n} from './readable-stream/reader-options';\nimport { convertReaderOptions } from './validators/reader-options';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from './readable-stream/pipe-options';\nimport type { ReadableStreamIteratorOptions } from './readable-stream/iterator-options';\nimport { convertIteratorOptions } from './validators/iterator-options';\nimport { convertPipeOptions } from './validators/pipe-options';\nimport type { ReadableWritablePair } from './readable-stream/readable-writable-pair';\nimport { convertReadableWritablePair } from './validators/readable-writable-pair';\nimport type { ReadableStreamDefaultReaderLike, ReadableStreamLike } from './readable-stream/readable-stream-like';\nimport type { NonShared } from './helpers/array-buffer-view';\n\nexport type DefaultReadableStream = ReadableStream & {\n _readableStreamController: ReadableStreamDefaultController\n};\n\nexport type ReadableByteStream = ReadableStream> & {\n _readableStreamController: ReadableByteStreamController\n};\n\ntype ReadableStreamState = 'readable' | 'closed' | 'errored';\n\n/**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\nexport class ReadableStream implements AsyncIterable {\n /** @internal */\n _state!: ReadableStreamState;\n /** @internal */\n _reader: ReadableStreamReader | undefined;\n /** @internal */\n _storedError: any;\n /** @internal */\n _disturbed!: boolean;\n /** @internal */\n _readableStreamController!: ReadableStreamDefaultController | ReadableByteStreamController;\n\n constructor(underlyingSource: UnderlyingByteSource, strategy?: { highWaterMark?: number; size?: undefined });\n constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSource: UnderlyingSource | UnderlyingByteSource | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n } else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n\n InitializeReadableStream(this);\n\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(\n this as unknown as ReadableByteStream,\n underlyingSource,\n highWaterMark\n );\n } else {\n assert(underlyingSource.type === undefined);\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n this,\n underlyingSource,\n highWaterMark,\n sizeAlgorithm\n );\n }\n }\n\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked(): boolean {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsReadableStreamLocked(this);\n }\n\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('cancel'));\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n\n return ReadableStreamCancel(this, reason);\n }\n\n /**\n * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader.\n *\n * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams,\n * i.e. streams which were constructed specifically with the ability to handle \"bring your own buffer\" reading.\n * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its\n * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise\n * control over allocation.\n */\n getReader({ mode }: { mode: 'byob' }): ReadableStreamBYOBReader;\n /**\n * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader.\n * While the stream is locked, no other reader can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to consume a stream\n * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours\n * or cancel the stream, which would interfere with your abstraction.\n */\n getReader(): ReadableStreamDefaultReader;\n getReader(\n rawOptions: ReadableStreamGetReaderOptions | null | undefined = undefined\n ): ReadableStreamDefaultReader | ReadableStreamBYOBReader {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('getReader');\n }\n\n const options = convertReaderOptions(rawOptions, 'First parameter');\n\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n\n assert(options.mode === 'byob');\n return AcquireReadableStreamBYOBReader(this as unknown as ReadableByteStream);\n }\n\n /**\n * Provides a convenient, chainable way of piping this readable stream through a transform stream\n * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream\n * into the writable side of the supplied pair, and returns the readable side for further use.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeThrough(\n transform: { readable: RS; writable: WritableStream },\n options?: StreamPipeOptions\n ): RS;\n pipeThrough(\n rawTransform: { readable: RS; writable: WritableStream } | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}\n ): RS {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n\n const promise = ReadableStreamPipeTo(\n this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n\n setPromiseIsHandledToTrue(promise);\n\n return transform.readable;\n }\n\n /**\n * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under\n * various error conditions can be customized with a number of passed options. It returns a promise that fulfills\n * when the piping process completes successfully, or rejects if any errors were encountered.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise;\n pipeTo(destination: WritableStream | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('pipeTo'));\n }\n\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(\n new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)\n );\n }\n\n let options: ValidatedStreamPipeOptions;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')\n );\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')\n );\n }\n\n return ReadableStreamPipeTo(\n this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n }\n\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee(): [ReadableStream, ReadableStream] {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('tee');\n }\n\n const branches = ReadableStreamTee(this, false);\n return CreateArrayFromList(branches);\n }\n\n /**\n * Asynchronously iterates over the chunks in the stream's internal queue.\n *\n * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader.\n * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method\n * is called, e.g. by breaking out of the loop.\n *\n * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also\n * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing\n * `true` for the `preventCancel` option.\n */\n values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n values(rawOptions: ReadableStreamIteratorOptions | null | undefined = undefined): ReadableStreamAsyncIterator {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('values');\n }\n\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n\n /**\n * {@inheritDoc ReadableStream.values}\n */\n [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n\n [SymbolAsyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator {\n // Stub implementation, overridden below\n return this.values(options);\n }\n\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream {\n return ReadableStreamFrom(asyncIterable);\n }\n}\n\nObject.defineProperties(ReadableStream, {\n from: { enumerable: true }\n});\nObject.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(ReadableStream.from, 'from');\nsetFunctionName(ReadableStream.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStream.prototype.getReader, 'getReader');\nsetFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\nsetFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\nsetFunctionName(ReadableStream.prototype.tee, 'tee');\nsetFunctionName(ReadableStream.prototype.values, 'values');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n}\nObject.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n});\n\nexport type {\n ReadableStreamAsyncIterator,\n ReadableStreamDefaultReadResult,\n ReadableStreamBYOBReadResult,\n ReadableStreamBYOBReaderReadOptions,\n UnderlyingByteSource,\n UnderlyingSource,\n UnderlyingSourceStartCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceCancelCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingByteSourcePullCallback,\n StreamPipeOptions,\n ReadableWritablePair,\n ReadableStreamIteratorOptions,\n ReadableStreamLike,\n ReadableStreamDefaultReaderLike\n};\n\n// Abstract operations for the ReadableStream.\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1\n): DefaultReadableStream {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: DefaultReadableStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n\n return stream;\n}\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableByteStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise\n): ReadableByteStream {\n const stream: ReadableByteStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n\n return stream;\n}\n\nfunction InitializeReadableStream(stream: ReadableStream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n}\n\nexport function IsReadableStream(x: unknown): x is ReadableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStream;\n}\n\nexport function IsReadableStreamDisturbed(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n return stream._disturbed;\n}\n\nexport function IsReadableStreamLocked(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n if (stream._reader === undefined) {\n return false;\n }\n\n return true;\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamCancel(stream: ReadableStream, reason: any): Promise {\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n ReadableStreamClose(stream);\n\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n}\n\nexport function ReadableStreamClose(stream: ReadableStream): void {\n assert(stream._state === 'readable');\n\n stream._state = 'closed';\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseResolve(reader);\n\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n}\n\nexport function ReadableStreamError(stream: ReadableStream, e: any): void {\n assert(IsReadableStream(stream));\n assert(stream._state === 'readable');\n\n stream._state = 'errored';\n stream._storedError = e;\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseReject(reader, e);\n\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n } else {\n assert(IsReadableStreamBYOBReader(reader));\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n}\n\n// Readers\n\nexport type ReadableStreamReader = ReadableStreamDefaultReader | ReadableStreamBYOBReader;\n\nexport {\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader\n};\n\n// Controllers\n\nexport {\n ReadableStreamDefaultController,\n ReadableStreamBYOBRequest,\n ReadableByteStreamController\n};\n\n// Helper functions for the ReadableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n}\n","import { assertDictionary, assertRequiredField } from './basic';\nimport { ReadableStream } from '../readable-stream';\nimport { WritableStream } from '../writable-stream';\nimport { assertReadableStream } from './readable-stream';\nimport { assertWritableStream } from './writable-stream';\n\nexport function convertReadableWritablePair(\n pair: { readable: RS; writable: WS } | null | undefined,\n context: string\n): { readable: RS; writable: WS } {\n assertDictionary(pair, context);\n\n const readable = pair?.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n\n const writable = pair?.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n\n return { readable, writable };\n}\n","import { assertDictionary } from './basic';\nimport type {\n ReadableStreamIteratorOptions,\n ValidatedReadableStreamIteratorOptions\n} from '../readable-stream/iterator-options';\n\nexport function convertIteratorOptions(options: ReadableStreamIteratorOptions | null | undefined,\n context: string): ValidatedReadableStreamIteratorOptions {\n assertDictionary(options, context);\n const preventCancel = options?.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n}\n","import type { QueuingStrategyInit } from '../queuing-strategy';\nimport { assertDictionary, assertRequiredField, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategyInit(init: QueuingStrategyInit | null | undefined,\n context: string): QueuingStrategyInit {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst byteLengthSizeFunction = (chunk: ArrayBufferView): number => {\n return chunk.byteLength;\n};\nsetFunctionName(byteLengthSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\nexport default class ByteLengthQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _byteLengthQueuingStrategyHighWaterMark: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size(): (chunk: ArrayBufferView) => number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n}\n\nObject.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the ByteLengthQueuingStrategy.\n\nfunction byteLengthBrandCheckException(name: string): TypeError {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n}\n\nexport function IsByteLengthQueuingStrategy(x: any): x is ByteLengthQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof ByteLengthQueuingStrategy;\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst countSizeFunction = (): 1 => {\n return 1;\n};\nsetFunctionName(countSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\nexport default class CountQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _countQueuingStrategyHighWaterMark!: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size(): (chunk: any) => 1 {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n}\n\nObject.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the CountQueuingStrategy.\n\nfunction countBrandCheckException(name: string): TypeError {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n}\n\nexport function IsCountQueuingStrategy(x: any): x is CountQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof CountQueuingStrategy;\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from '../transform-stream/transformer';\nimport { TransformStreamDefaultController } from '../transform-stream';\n\nexport function convertTransformer(original: Transformer | null,\n context: string): ValidatedTransformer {\n assertDictionary(original, context);\n const cancel = original?.cancel;\n const flush = original?.flush;\n const readableType = original?.readableType;\n const start = original?.start;\n const transform = original?.transform;\n const writableType = original?.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original!, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original!, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original!, `${context} has member 'transform' that`),\n writableType\n };\n}\n\nfunction convertTransformerFlushCallback(\n fn: TransformerFlushCallback,\n original: Transformer,\n context: string\n): (controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertTransformerStartCallback(\n fn: TransformerStartCallback,\n original: Transformer,\n context: string\n): TransformerStartCallback {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertTransformerTransformCallback(\n fn: TransformerTransformCallback,\n original: Transformer,\n context: string\n): (chunk: I, controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: I, controller: TransformStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n\nfunction convertTransformerCancelCallback(\n fn: TransformerCancelCallback,\n original: Transformer,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith,\n uponPromise\n} from './helpers/webidl';\nimport { CreateReadableStream, type DefaultReadableStream, ReadableStream } from './readable-stream';\nimport {\n ReadableStreamDefaultControllerCanCloseOrEnqueue,\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError,\n ReadableStreamDefaultControllerGetDesiredSize,\n ReadableStreamDefaultControllerHasBackpressure\n} from './readable-stream/default-controller';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { CreateWritableStream, WritableStream, WritableStreamDefaultControllerErrorIfNeeded } from './writable-stream';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from './transform-stream/transformer';\nimport { convertTransformer } from './validators/transformer';\n\n// Class TransformStream\n\n/**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\nexport class TransformStream {\n /** @internal */\n _writable!: WritableStream;\n /** @internal */\n _readable!: DefaultReadableStream;\n /** @internal */\n _backpressure!: boolean;\n /** @internal */\n _backpressureChangePromise!: Promise;\n /** @internal */\n _backpressureChangePromise_resolve!: () => void;\n /** @internal */\n _transformStreamController!: TransformStreamDefaultController;\n\n constructor(\n transformer?: Transformer,\n writableStrategy?: QueuingStrategy,\n readableStrategy?: QueuingStrategy\n );\n constructor(rawTransformer: Transformer | null | undefined = {},\n rawWritableStrategy: QueuingStrategy | null | undefined = {},\n rawReadableStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(\n this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm\n );\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n } else {\n startPromise_resolve(undefined);\n }\n }\n\n /**\n * The readable side of the transform stream.\n */\n get readable(): ReadableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n\n return this._readable;\n }\n\n /**\n * The writable side of the transform stream.\n */\n get writable(): WritableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n\n return this._writable;\n }\n}\n\nObject.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n}\n\nexport type {\n Transformer,\n TransformerCancelCallback,\n TransformerStartCallback,\n TransformerFlushCallback,\n TransformerTransformCallback\n};\n\n// Transform Stream Abstract Operations\n\nexport function CreateTransformStream(startAlgorithm: () => void | PromiseLike,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n writableHighWaterMark = 1,\n writableSizeAlgorithm: QueuingStrategySizeCallback = () => 1,\n readableHighWaterMark = 0,\n readableSizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(writableHighWaterMark));\n assert(IsNonNegativeNumber(readableHighWaterMark));\n\n const stream: TransformStream = Object.create(TransformStream.prototype);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n\n const startResult = startAlgorithm();\n startPromise_resolve(startResult);\n return stream;\n}\n\nfunction InitializeTransformStream(stream: TransformStream,\n startPromise: Promise,\n writableHighWaterMark: number,\n writableSizeAlgorithm: QueuingStrategySizeCallback,\n readableHighWaterMark: number,\n readableSizeAlgorithm: QueuingStrategySizeCallback) {\n function startAlgorithm(): Promise {\n return startPromise;\n }\n\n function writeAlgorithm(chunk: I): Promise {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n\n function abortAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n\n function closeAlgorithm(): Promise {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm,\n writableHighWaterMark, writableSizeAlgorithm);\n\n function pullAlgorithm(): Promise {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n\n function cancelAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined!;\n stream._backpressureChangePromise = undefined!;\n stream._backpressureChangePromise_resolve = undefined!;\n TransformStreamSetBackpressure(stream, true);\n\n stream._transformStreamController = undefined!;\n}\n\nfunction IsTransformStream(x: unknown): x is TransformStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n\n return x instanceof TransformStream;\n}\n\n// This is a no-op if both sides are already errored.\nfunction TransformStreamError(stream: TransformStream, e: any) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n}\n\nfunction TransformStreamErrorWritableAndUnblockWrite(stream: TransformStream, e: any) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n}\n\nfunction TransformStreamUnblockWrite(stream: TransformStream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure()\n // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time\n // _backpressure is set.\n TransformStreamSetBackpressure(stream, false);\n }\n}\n\nfunction TransformStreamSetBackpressure(stream: TransformStream, backpressure: boolean) {\n // Passes also when called during construction.\n assert(stream._backpressure !== backpressure);\n\n if (stream._backpressureChangePromise !== undefined) {\n stream._backpressureChangePromise_resolve();\n }\n\n stream._backpressureChangePromise = newPromise(resolve => {\n stream._backpressureChangePromise_resolve = resolve;\n });\n\n stream._backpressure = backpressure;\n}\n\n// Class TransformStreamDefaultController\n\n/**\n * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}.\n *\n * @public\n */\nexport class TransformStreamDefaultController {\n /** @internal */\n _controlledTransformStream: TransformStream;\n /** @internal */\n _finishPromise: Promise | undefined;\n /** @internal */\n _finishPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _finishPromise_reject?: (reason: any) => void;\n /** @internal */\n _transformAlgorithm: (chunk: any) => Promise;\n /** @internal */\n _flushAlgorithm: () => Promise;\n /** @internal */\n _cancelAlgorithm: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full.\n */\n get desiredSize(): number | null {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n const readableController = this._controlledTransformStream._readable._readableStreamController;\n return ReadableStreamDefaultControllerGetDesiredSize(readableController);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the readable side of the controlled transform stream.\n */\n enqueue(chunk: O): void;\n enqueue(chunk: O = undefined!): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n TransformStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors both the readable side and the writable side of the controlled transform stream, making all future\n * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.\n */\n error(reason: any = undefined): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n TransformStreamDefaultControllerError(this, reason);\n }\n\n /**\n * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate(): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n\n TransformStreamDefaultControllerTerminate(this);\n }\n}\n\nObject.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(TransformStreamDefaultController.prototype.error, 'error');\nsetFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n}\n\n// Transform Stream Default Controller Abstract Operations\n\nfunction IsTransformStreamDefaultController(x: any): x is TransformStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n\n return x instanceof TransformStreamDefaultController;\n}\n\nfunction SetUpTransformStreamDefaultController(stream: TransformStream,\n controller: TransformStreamDefaultController,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise) {\n assert(IsTransformStream(stream));\n assert(stream._transformStreamController === undefined);\n\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nfunction SetUpTransformStreamDefaultControllerFromTransformer(stream: TransformStream,\n transformer: ValidatedTransformer) {\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n let transformAlgorithm: (chunk: I) => Promise;\n let flushAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform!(chunk, controller);\n } else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk as unknown as O);\n return promiseResolvedWith(undefined);\n } catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush!(controller);\n } else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n}\n\nfunction TransformStreamDefaultControllerClearAlgorithms(controller: TransformStreamDefaultController) {\n controller._transformAlgorithm = undefined!;\n controller._flushAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\nfunction TransformStreamDefaultControllerEnqueue(controller: TransformStreamDefaultController, chunk: O) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n\n // We throttle transform invocations based on the backpressure of the ReadableStream, but we still\n // accept TransformStreamDefaultControllerEnqueue() calls.\n\n try {\n ReadableStreamDefaultControllerEnqueue(readableController, chunk);\n } catch (e) {\n // This happens when readableStrategy.size() throws.\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n\n throw stream._readable._storedError;\n }\n\n const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);\n if (backpressure !== stream._backpressure) {\n assert(backpressure);\n TransformStreamSetBackpressure(stream, true);\n }\n}\n\nfunction TransformStreamDefaultControllerError(controller: TransformStreamDefaultController, e: any) {\n TransformStreamError(controller._controlledTransformStream, e);\n}\n\nfunction TransformStreamDefaultControllerPerformTransform(controller: TransformStreamDefaultController,\n chunk: I) {\n const transformPromise = controller._transformAlgorithm(chunk);\n return transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n}\n\nfunction TransformStreamDefaultControllerTerminate(controller: TransformStreamDefaultController) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n\n ReadableStreamDefaultControllerClose(readableController);\n\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n}\n\n// TransformStreamDefaultSink Algorithms\n\nfunction TransformStreamDefaultSinkWriteAlgorithm(stream: TransformStream, chunk: I): Promise {\n assert(stream._writable._state === 'writable');\n\n const controller = stream._transformStreamController;\n\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n assert(backpressureChangePromise !== undefined);\n return transformPromiseWith(backpressureChangePromise, () => {\n const writable = stream._writable;\n const state = writable._state;\n if (state === 'erroring') {\n throw writable._storedError;\n }\n assert(state === 'writable');\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n });\n }\n\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n}\n\nfunction TransformStreamDefaultSinkAbortAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally,\n // we don't run the _cancelAlgorithm again.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerError(readable._readableStreamController, reason);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\nfunction TransformStreamDefaultSinkCloseAlgorithm(stream: TransformStream): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// TransformStreamDefaultSource Algorithms\n\nfunction TransformStreamDefaultSourcePullAlgorithm(stream: TransformStream): Promise {\n // Invariant. Enforced by the promises returned by start() and pull().\n assert(stream._backpressure);\n\n assert(stream._backpressureChangePromise !== undefined);\n\n TransformStreamSetBackpressure(stream, false);\n\n // Prevent the next pull() call until there is backpressure.\n return stream._backpressureChangePromise;\n}\n\nfunction TransformStreamDefaultSourceCancelAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._writable cannot change after construction, so caching it across a call to user code is safe.\n const writable = stream._writable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or\n // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the\n // _flushAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (writable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, writable._storedError);\n } else {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// Helper functions for the TransformStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n}\n\nexport function defaultControllerFinishPromiseResolve(controller: TransformStreamDefaultController) {\n if (controller._finishPromise_resolve === undefined) {\n return;\n }\n\n controller._finishPromise_resolve();\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nexport function defaultControllerFinishPromiseReject(controller: TransformStreamDefaultController, reason: any) {\n if (controller._finishPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(controller._finishPromise!);\n controller._finishPromise_reject(reason);\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\n// Helper functions for the TransformStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStream.prototype.${name} can only be used on a TransformStream`);\n}\n","import {\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n ReadableByteStreamController,\n ReadableStream,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultController,\n ReadableStreamDefaultReader,\n TransformStream,\n TransformStreamDefaultController,\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter\n} from './ponyfill';\nimport { globals } from './globals';\n\n// Export\nexport * from './ponyfill';\n\nconst exports = {\n ReadableStream,\n ReadableStreamDefaultController,\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader,\n\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter,\n\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n\n TransformStream,\n TransformStreamDefaultController\n};\n\n// Add classes to global scope\nif (typeof 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\ No newline at end of file diff --git a/node_modules/web-streams-polyfill/dist/polyfill.es6.mjs b/node_modules/web-streams-polyfill/dist/polyfill.es6.mjs new file mode 100644 index 00000000..9c3f00f8 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/polyfill.es6.mjs @@ -0,0 +1,4818 @@ +/** + * @license + * web-streams-polyfill v3.3.3 + * Copyright 2024 Mattias Buelens, Diwank Singh Tomer and other contributors. + * This code is released under the MIT license. + * SPDX-License-Identifier: MIT + */ +function noop() { + return undefined; +} + +function typeIsObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; +} +const rethrowAssertionErrorRejection = noop; +function setFunctionName(fn, name) { + try { + Object.defineProperty(fn, 'name', { + value: name, + configurable: true + }); + } + catch (_a) { + // This property is non-configurable in older browsers, so ignore if this throws. + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility + } +} + +const originalPromise = Promise; +const originalPromiseThen = Promise.prototype.then; +const originalPromiseReject = Promise.reject.bind(originalPromise); +// https://webidl.spec.whatwg.org/#a-new-promise +function newPromise(executor) { + return new originalPromise(executor); +} +// https://webidl.spec.whatwg.org/#a-promise-resolved-with +function promiseResolvedWith(value) { + return newPromise(resolve => resolve(value)); +} +// https://webidl.spec.whatwg.org/#a-promise-rejected-with +function promiseRejectedWith(reason) { + return originalPromiseReject(reason); +} +function PerformPromiseThen(promise, onFulfilled, onRejected) { + // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an + // approximation. + return originalPromiseThen.call(promise, onFulfilled, onRejected); +} +// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned +// from that handler. To prevent this, return null instead of void from all handlers. +// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it +function uponPromise(promise, onFulfilled, onRejected) { + PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection); +} +function uponFulfillment(promise, onFulfilled) { + uponPromise(promise, onFulfilled); +} +function uponRejection(promise, onRejected) { + uponPromise(promise, undefined, onRejected); +} +function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) { + return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler); +} +function setPromiseIsHandledToTrue(promise) { + PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection); +} +let _queueMicrotask = callback => { + if (typeof queueMicrotask === 'function') { + _queueMicrotask = queueMicrotask; + } + else { + const resolvedPromise = promiseResolvedWith(undefined); + _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb); + } + return _queueMicrotask(callback); +}; +function reflectCall(F, V, args) { + if (typeof F !== 'function') { + throw new TypeError('Argument is not a function'); + } + return Function.prototype.apply.call(F, V, args); +} +function promiseCall(F, V, args) { + try { + return promiseResolvedWith(reflectCall(F, V, args)); + } + catch (value) { + return promiseRejectedWith(value); + } +} + +// Original from Chromium +// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js +const QUEUE_MAX_ARRAY_SIZE = 16384; +/** + * Simple queue structure. + * + * Avoids scalability issues with using a packed array directly by using + * multiple arrays in a linked list and keeping the array size bounded. + */ +class SimpleQueue { + constructor() { + this._cursor = 0; + this._size = 0; + // _front and _back are always defined. + this._front = { + _elements: [], + _next: undefined + }; + this._back = this._front; + // The cursor is used to avoid calling Array.shift(). + // It contains the index of the front element of the array inside the + // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE). + this._cursor = 0; + // When there is only one node, size === elements.length - cursor. + this._size = 0; + } + get length() { + return this._size; + } + // For exception safety, this method is structured in order: + // 1. Read state + // 2. Calculate required state mutations + // 3. Perform state mutations + push(element) { + const oldBack = this._back; + let newBack = oldBack; + if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) { + newBack = { + _elements: [], + _next: undefined + }; + } + // push() is the mutation most likely to throw an exception, so it + // goes first. + oldBack._elements.push(element); + if (newBack !== oldBack) { + this._back = newBack; + oldBack._next = newBack; + } + ++this._size; + } + // Like push(), shift() follows the read -> calculate -> mutate pattern for + // exception safety. + shift() { // must not be called on an empty queue + const oldFront = this._front; + let newFront = oldFront; + const oldCursor = this._cursor; + let newCursor = oldCursor + 1; + const elements = oldFront._elements; + const element = elements[oldCursor]; + if (newCursor === QUEUE_MAX_ARRAY_SIZE) { + newFront = oldFront._next; + newCursor = 0; + } + // No mutations before this point. + --this._size; + this._cursor = newCursor; + if (oldFront !== newFront) { + this._front = newFront; + } + // Permit shifted element to be garbage collected. + elements[oldCursor] = undefined; + return element; + } + // The tricky thing about forEach() is that it can be called + // re-entrantly. The queue may be mutated inside the callback. It is easy to + // see that push() within the callback has no negative effects since the end + // of the queue is checked for on every iteration. If shift() is called + // repeatedly within the callback then the next iteration may return an + // element that has been removed. In this case the callback will be called + // with undefined values until we either "catch up" with elements that still + // exist or reach the back of the queue. + forEach(callback) { + let i = this._cursor; + let node = this._front; + let elements = node._elements; + while (i !== elements.length || node._next !== undefined) { + if (i === elements.length) { + node = node._next; + elements = node._elements; + i = 0; + if (elements.length === 0) { + break; + } + } + callback(elements[i]); + ++i; + } + } + // Return the element that would be returned if shift() was called now, + // without modifying the queue. + peek() { // must not be called on an empty queue + const front = this._front; + const cursor = this._cursor; + return front._elements[cursor]; + } +} + +const AbortSteps = Symbol('[[AbortSteps]]'); +const ErrorSteps = Symbol('[[ErrorSteps]]'); +const CancelSteps = Symbol('[[CancelSteps]]'); +const PullSteps = Symbol('[[PullSteps]]'); +const ReleaseSteps = Symbol('[[ReleaseSteps]]'); + +function ReadableStreamReaderGenericInitialize(reader, stream) { + reader._ownerReadableStream = stream; + stream._reader = reader; + if (stream._state === 'readable') { + defaultReaderClosedPromiseInitialize(reader); + } + else if (stream._state === 'closed') { + defaultReaderClosedPromiseInitializeAsResolved(reader); + } + else { + defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError); + } +} +// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state +// check. +function ReadableStreamReaderGenericCancel(reader, reason) { + const stream = reader._ownerReadableStream; + return ReadableStreamCancel(stream, reason); +} +function ReadableStreamReaderGenericRelease(reader) { + const stream = reader._ownerReadableStream; + if (stream._state === 'readable') { + defaultReaderClosedPromiseReject(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + else { + defaultReaderClosedPromiseResetToRejected(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + stream._readableStreamController[ReleaseSteps](); + stream._reader = undefined; + reader._ownerReadableStream = undefined; +} +// Helper functions for the readers. +function readerLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released reader'); +} +// Helper functions for the ReadableStreamDefaultReader. +function defaultReaderClosedPromiseInitialize(reader) { + reader._closedPromise = newPromise((resolve, reject) => { + reader._closedPromise_resolve = resolve; + reader._closedPromise_reject = reject; + }); +} +function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseReject(reader, reason); +} +function defaultReaderClosedPromiseInitializeAsResolved(reader) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseResolve(reader); +} +function defaultReaderClosedPromiseReject(reader, reason) { + if (reader._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(reader._closedPromise); + reader._closedPromise_reject(reason); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; +} +function defaultReaderClosedPromiseResetToRejected(reader, reason) { + defaultReaderClosedPromiseInitializeAsRejected(reader, reason); +} +function defaultReaderClosedPromiseResolve(reader) { + if (reader._closedPromise_resolve === undefined) { + return; + } + reader._closedPromise_resolve(undefined); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; +} + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill +const NumberIsFinite = Number.isFinite || function (x) { + return typeof x === 'number' && isFinite(x); +}; + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill +const MathTrunc = Math.trunc || function (v) { + return v < 0 ? Math.ceil(v) : Math.floor(v); +}; + +// https://heycam.github.io/webidl/#idl-dictionaries +function isDictionary(x) { + return typeof x === 'object' || typeof x === 'function'; +} +function assertDictionary(obj, context) { + if (obj !== undefined && !isDictionary(obj)) { + throw new TypeError(`${context} is not an object.`); + } +} +// https://heycam.github.io/webidl/#idl-callback-functions +function assertFunction(x, context) { + if (typeof x !== 'function') { + throw new TypeError(`${context} is not a function.`); + } +} +// https://heycam.github.io/webidl/#idl-object +function isObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; +} +function assertObject(x, context) { + if (!isObject(x)) { + throw new TypeError(`${context} is not an object.`); + } +} +function assertRequiredArgument(x, position, context) { + if (x === undefined) { + throw new TypeError(`Parameter ${position} is required in '${context}'.`); + } +} +function assertRequiredField(x, field, context) { + if (x === undefined) { + throw new TypeError(`${field} is required in '${context}'.`); + } +} +// https://heycam.github.io/webidl/#idl-unrestricted-double +function convertUnrestrictedDouble(value) { + return Number(value); +} +function censorNegativeZero(x) { + return x === 0 ? 0 : x; +} +function integerPart(x) { + return censorNegativeZero(MathTrunc(x)); +} +// https://heycam.github.io/webidl/#idl-unsigned-long-long +function convertUnsignedLongLongWithEnforceRange(value, context) { + const lowerBound = 0; + const upperBound = Number.MAX_SAFE_INTEGER; + let x = Number(value); + x = censorNegativeZero(x); + if (!NumberIsFinite(x)) { + throw new TypeError(`${context} is not a finite number`); + } + x = integerPart(x); + if (x < lowerBound || x > upperBound) { + throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`); + } + if (!NumberIsFinite(x) || x === 0) { + return 0; + } + // TODO Use BigInt if supported? + // let xBigInt = BigInt(integerPart(x)); + // xBigInt = BigInt.asUintN(64, xBigInt); + // return Number(xBigInt); + return x; +} + +function assertReadableStream(x, context) { + if (!IsReadableStream(x)) { + throw new TypeError(`${context} is not a ReadableStream.`); + } +} + +// Abstract operations for the ReadableStream. +function AcquireReadableStreamDefaultReader(stream) { + return new ReadableStreamDefaultReader(stream); +} +// ReadableStream API exposed for controllers. +function ReadableStreamAddReadRequest(stream, readRequest) { + stream._reader._readRequests.push(readRequest); +} +function ReadableStreamFulfillReadRequest(stream, chunk, done) { + const reader = stream._reader; + const readRequest = reader._readRequests.shift(); + if (done) { + readRequest._closeSteps(); + } + else { + readRequest._chunkSteps(chunk); + } +} +function ReadableStreamGetNumReadRequests(stream) { + return stream._reader._readRequests.length; +} +function ReadableStreamHasDefaultReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamDefaultReader(reader)) { + return false; + } + return true; +} +/** + * A default reader vended by a {@link ReadableStream}. + * + * @public + */ +class ReadableStreamDefaultReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, + * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + /** + * Returns a promise that allows access to the next chunk from the stream's internal queue, if available. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + read() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('read')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: () => resolvePromise({ value: undefined, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamDefaultReaderRead(this, readRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamDefaultReader(this)) { + throw defaultReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamDefaultReaderRelease(this); + } +} +Object.defineProperties(ReadableStreamDefaultReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } +}); +setFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel'); +setFunctionName(ReadableStreamDefaultReader.prototype.read, 'read'); +setFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultReader', + configurable: true + }); +} +// Abstract operations for the readers. +function IsReadableStreamDefaultReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) { + return false; + } + return x instanceof ReadableStreamDefaultReader; +} +function ReadableStreamDefaultReaderRead(reader, readRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'closed') { + readRequest._closeSteps(); + } + else if (stream._state === 'errored') { + readRequest._errorSteps(stream._storedError); + } + else { + stream._readableStreamController[PullSteps](readRequest); + } +} +function ReadableStreamDefaultReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamDefaultReaderErrorReadRequests(reader, e); +} +function ReadableStreamDefaultReaderErrorReadRequests(reader, e) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._errorSteps(e); + }); +} +// Helper functions for the ReadableStreamDefaultReader. +function defaultReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`); +} + +/****************************************************************************** +Copyright (c) Microsoft Corporation. + +Permission to use, copy, modify, and/or distribute this software for any +purpose with or without fee is hereby granted. + +THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH +REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY +AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, +INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM +LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR +OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR +PERFORMANCE OF THIS SOFTWARE. +***************************************************************************** */ +/* global Reflect, Promise, SuppressedError, Symbol */ + + +function __values(o) { + var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0; + if (m) return m.call(o); + if (o && typeof o.length === "number") return { + next: function () { + if (o && i >= o.length) o = void 0; + return { value: o && o[i++], done: !o }; + } + }; + throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined."); +} + +function __await(v) { + return this instanceof __await ? (this.v = v, this) : new __await(v); +} + +function __asyncGenerator(thisArg, _arguments, generator) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var g = generator.apply(thisArg, _arguments || []), i, q = []; + return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i; + function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; } + function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } } + function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); } + function fulfill(value) { resume("next", value); } + function reject(value) { resume("throw", value); } + function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); } +} + +function __asyncDelegator(o) { + var i, p; + return i = {}, verb("next"), verb("throw", function (e) { throw e; }), verb("return"), i[Symbol.iterator] = function () { return this; }, i; + function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; } +} + +function __asyncValues(o) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var m = o[Symbol.asyncIterator], i; + return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i); + function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; } + function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); } +} + +typeof SuppressedError === "function" ? SuppressedError : function (error, suppressed, message) { + var e = new Error(message); + return e.name = "SuppressedError", e.error = error, e.suppressed = suppressed, e; +}; + +var _a, _b, _c; +function CreateArrayFromList(elements) { + // We use arrays to represent lists, so this is basically a no-op. + // Do a slice though just in case we happen to depend on the unique-ness. + return elements.slice(); +} +function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) { + new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset); +} +let TransferArrayBuffer = (O) => { + if (typeof O.transfer === 'function') { + TransferArrayBuffer = buffer => buffer.transfer(); + } + else if (typeof structuredClone === 'function') { + TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] }); + } + else { + // Not implemented correctly + TransferArrayBuffer = buffer => buffer; + } + return TransferArrayBuffer(O); +}; +let IsDetachedBuffer = (O) => { + if (typeof O.detached === 'boolean') { + IsDetachedBuffer = buffer => buffer.detached; + } + else { + // Not implemented correctly + IsDetachedBuffer = buffer => buffer.byteLength === 0; + } + return IsDetachedBuffer(O); +}; +function ArrayBufferSlice(buffer, begin, end) { + // ArrayBuffer.prototype.slice is not available on IE10 + // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice + if (buffer.slice) { + return buffer.slice(begin, end); + } + const length = end - begin; + const slice = new ArrayBuffer(length); + CopyDataBlockBytes(slice, 0, buffer, begin, length); + return slice; +} +function GetMethod(receiver, prop) { + const func = receiver[prop]; + if (func === undefined || func === null) { + return undefined; + } + if (typeof func !== 'function') { + throw new TypeError(`${String(prop)} is not a function`); + } + return func; +} +function CreateAsyncFromSyncIterator(syncIteratorRecord) { + // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%, + // we use yield* inside an async generator function to achieve the same result. + // Wrap the sync iterator inside a sync iterable, so we can use it with yield*. + const syncIterable = { + [Symbol.iterator]: () => syncIteratorRecord.iterator + }; + // Create an async generator function and immediately invoke it. + const asyncIterator = (function () { + return __asyncGenerator(this, arguments, function* () { + return yield __await(yield __await(yield* __asyncDelegator(__asyncValues(syncIterable)))); + }); + }()); + // Return as an async iterator record. + const nextMethod = asyncIterator.next; + return { iterator: asyncIterator, nextMethod, done: false }; +} +// Aligns with core-js/modules/es.symbol.async-iterator.js +const SymbolAsyncIterator = (_c = (_a = Symbol.asyncIterator) !== null && _a !== void 0 ? _a : (_b = Symbol.for) === null || _b === void 0 ? void 0 : _b.call(Symbol, 'Symbol.asyncIterator')) !== null && _c !== void 0 ? _c : '@@asyncIterator'; +function GetIterator(obj, hint = 'sync', method) { + if (method === undefined) { + if (hint === 'async') { + method = GetMethod(obj, SymbolAsyncIterator); + if (method === undefined) { + const syncMethod = GetMethod(obj, Symbol.iterator); + const syncIteratorRecord = GetIterator(obj, 'sync', syncMethod); + return CreateAsyncFromSyncIterator(syncIteratorRecord); + } + } + else { + method = GetMethod(obj, Symbol.iterator); + } + } + if (method === undefined) { + throw new TypeError('The object is not iterable'); + } + const iterator = reflectCall(method, obj, []); + if (!typeIsObject(iterator)) { + throw new TypeError('The iterator method must return an object'); + } + const nextMethod = iterator.next; + return { iterator, nextMethod, done: false }; +} +function IteratorNext(iteratorRecord) { + const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []); + if (!typeIsObject(result)) { + throw new TypeError('The iterator.next() method must return an object'); + } + return result; +} +function IteratorComplete(iterResult) { + return Boolean(iterResult.done); +} +function IteratorValue(iterResult) { + return iterResult.value; +} + +/// +// We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it. +const AsyncIteratorPrototype = { + // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( ) + // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator + [SymbolAsyncIterator]() { + return this; + } +}; +Object.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false }); + +/// +class ReadableStreamAsyncIteratorImpl { + constructor(reader, preventCancel) { + this._ongoingPromise = undefined; + this._isFinished = false; + this._reader = reader; + this._preventCancel = preventCancel; + } + next() { + const nextSteps = () => this._nextSteps(); + this._ongoingPromise = this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) : + nextSteps(); + return this._ongoingPromise; + } + return(value) { + const returnSteps = () => this._returnSteps(value); + return this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) : + returnSteps(); + } + _nextSteps() { + if (this._isFinished) { + return Promise.resolve({ value: undefined, done: true }); + } + const reader = this._reader; + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => { + this._ongoingPromise = undefined; + // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test. + // FIXME Is this a bug in the specification, or in the test? + _queueMicrotask(() => resolvePromise({ value: chunk, done: false })); + }, + _closeSteps: () => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + resolvePromise({ value: undefined, done: true }); + }, + _errorSteps: reason => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + rejectPromise(reason); + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promise; + } + _returnSteps(value) { + if (this._isFinished) { + return Promise.resolve({ value, done: true }); + } + this._isFinished = true; + const reader = this._reader; + if (!this._preventCancel) { + const result = ReadableStreamReaderGenericCancel(reader, value); + ReadableStreamReaderGenericRelease(reader); + return transformPromiseWith(result, () => ({ value, done: true })); + } + ReadableStreamReaderGenericRelease(reader); + return promiseResolvedWith({ value, done: true }); + } +} +const ReadableStreamAsyncIteratorPrototype = { + next() { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next')); + } + return this._asyncIteratorImpl.next(); + }, + return(value) { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return')); + } + return this._asyncIteratorImpl.return(value); + } +}; +Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype); +// Abstract operations for the ReadableStream. +function AcquireReadableStreamAsyncIterator(stream, preventCancel) { + const reader = AcquireReadableStreamDefaultReader(stream); + const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel); + const iterator = Object.create(ReadableStreamAsyncIteratorPrototype); + iterator._asyncIteratorImpl = impl; + return iterator; +} +function IsReadableStreamAsyncIterator(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) { + return false; + } + try { + // noinspection SuspiciousTypeOfGuard + return x._asyncIteratorImpl instanceof + ReadableStreamAsyncIteratorImpl; + } + catch (_a) { + return false; + } +} +// Helper functions for the ReadableStream. +function streamAsyncIteratorBrandCheckException(name) { + return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`); +} + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill +const NumberIsNaN = Number.isNaN || function (x) { + // eslint-disable-next-line no-self-compare + return x !== x; +}; + +function IsNonNegativeNumber(v) { + if (typeof v !== 'number') { + return false; + } + if (NumberIsNaN(v)) { + return false; + } + if (v < 0) { + return false; + } + return true; +} +function CloneAsUint8Array(O) { + const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength); + return new Uint8Array(buffer); +} + +function DequeueValue(container) { + const pair = container._queue.shift(); + container._queueTotalSize -= pair.size; + if (container._queueTotalSize < 0) { + container._queueTotalSize = 0; + } + return pair.value; +} +function EnqueueValueWithSize(container, value, size) { + if (!IsNonNegativeNumber(size) || size === Infinity) { + throw new RangeError('Size must be a finite, non-NaN, non-negative number.'); + } + container._queue.push({ value, size }); + container._queueTotalSize += size; +} +function PeekQueueValue(container) { + const pair = container._queue.peek(); + return pair.value; +} +function ResetQueue(container) { + container._queue = new SimpleQueue(); + container._queueTotalSize = 0; +} + +function isDataViewConstructor(ctor) { + return ctor === DataView; +} +function isDataView(view) { + return isDataViewConstructor(view.constructor); +} +function arrayBufferViewElementSize(ctor) { + if (isDataViewConstructor(ctor)) { + return 1; + } + return ctor.BYTES_PER_ELEMENT; +} + +/** + * A pull-into request in a {@link ReadableByteStreamController}. + * + * @public + */ +class ReadableStreamBYOBRequest { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the view for writing in to, or `null` if the BYOB request has already been responded to. + */ + get view() { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('view'); + } + return this._view; + } + respond(bytesWritten) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respond'); + } + assertRequiredArgument(bytesWritten, 1, 'respond'); + bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter'); + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(this._view.buffer)) { + throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`); + } + ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten); + } + respondWithNewView(view) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respondWithNewView'); + } + assertRequiredArgument(view, 1, 'respondWithNewView'); + if (!ArrayBuffer.isView(view)) { + throw new TypeError('You can only respond with array buffer views'); + } + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(view.buffer)) { + throw new TypeError('The given view\'s buffer has been detached and so cannot be used as a response'); + } + ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view); + } +} +Object.defineProperties(ReadableStreamBYOBRequest.prototype, { + respond: { enumerable: true }, + respondWithNewView: { enumerable: true }, + view: { enumerable: true } +}); +setFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond'); +setFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBRequest', + configurable: true + }); +} +/** + * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue. + * + * @public + */ +class ReadableByteStreamController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the current BYOB pull request, or `null` if there isn't one. + */ + get byobRequest() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('byobRequest'); + } + return ReadableByteStreamControllerGetBYOBRequest(this); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('desiredSize'); + } + return ReadableByteStreamControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('close'); + } + if (this._closeRequested) { + throw new TypeError('The stream has already been closed; do not close it again!'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`); + } + ReadableByteStreamControllerClose(this); + } + enqueue(chunk) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('enqueue'); + } + assertRequiredArgument(chunk, 1, 'enqueue'); + if (!ArrayBuffer.isView(chunk)) { + throw new TypeError('chunk must be an array buffer view'); + } + if (chunk.byteLength === 0) { + throw new TypeError('chunk must have non-zero byteLength'); + } + if (chunk.buffer.byteLength === 0) { + throw new TypeError(`chunk's buffer must have non-zero byteLength`); + } + if (this._closeRequested) { + throw new TypeError('stream is closed or draining'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`); + } + ReadableByteStreamControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('error'); + } + ReadableByteStreamControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ReadableByteStreamControllerClearPendingPullIntos(this); + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableByteStreamControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableByteStream; + if (this._queueTotalSize > 0) { + ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest); + return; + } + const autoAllocateChunkSize = this._autoAllocateChunkSize; + if (autoAllocateChunkSize !== undefined) { + let buffer; + try { + buffer = new ArrayBuffer(autoAllocateChunkSize); + } + catch (bufferE) { + readRequest._errorSteps(bufferE); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: autoAllocateChunkSize, + byteOffset: 0, + byteLength: autoAllocateChunkSize, + bytesFilled: 0, + minimumFill: 1, + elementSize: 1, + viewConstructor: Uint8Array, + readerType: 'default' + }; + this._pendingPullIntos.push(pullIntoDescriptor); + } + ReadableStreamAddReadRequest(stream, readRequest); + ReadableByteStreamControllerCallPullIfNeeded(this); + } + /** @internal */ + [ReleaseSteps]() { + if (this._pendingPullIntos.length > 0) { + const firstPullInto = this._pendingPullIntos.peek(); + firstPullInto.readerType = 'none'; + this._pendingPullIntos = new SimpleQueue(); + this._pendingPullIntos.push(firstPullInto); + } + } +} +Object.defineProperties(ReadableByteStreamController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + byobRequest: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(ReadableByteStreamController.prototype.close, 'close'); +setFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue'); +setFunctionName(ReadableByteStreamController.prototype.error, 'error'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, { + value: 'ReadableByteStreamController', + configurable: true + }); +} +// Abstract operations for the ReadableByteStreamController. +function IsReadableByteStreamController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) { + return false; + } + return x instanceof ReadableByteStreamController; +} +function IsReadableStreamBYOBRequest(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) { + return false; + } + return x instanceof ReadableStreamBYOBRequest; +} +function ReadableByteStreamControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableByteStreamControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + // TODO: Test controller argument + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableByteStreamControllerError(controller, e); + return null; + }); +} +function ReadableByteStreamControllerClearPendingPullIntos(controller) { + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + controller._pendingPullIntos = new SimpleQueue(); +} +function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) { + let done = false; + if (stream._state === 'closed') { + done = true; + } + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'default') { + ReadableStreamFulfillReadRequest(stream, filledView, done); + } + else { + ReadableStreamFulfillReadIntoRequest(stream, filledView, done); + } +} +function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) { + const bytesFilled = pullIntoDescriptor.bytesFilled; + const elementSize = pullIntoDescriptor.elementSize; + return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize); +} +function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) { + controller._queue.push({ buffer, byteOffset, byteLength }); + controller._queueTotalSize += byteLength; +} +function ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, buffer, byteOffset, byteLength) { + let clonedChunk; + try { + clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength); + } + catch (cloneE) { + ReadableByteStreamControllerError(controller, cloneE); + throw cloneE; + } + ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength); +} +function ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstDescriptor) { + if (firstDescriptor.bytesFilled > 0) { + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, firstDescriptor.buffer, firstDescriptor.byteOffset, firstDescriptor.bytesFilled); + } + ReadableByteStreamControllerShiftPendingPullInto(controller); +} +function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) { + const maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled); + const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy; + let totalBytesToCopyRemaining = maxBytesToCopy; + let ready = false; + const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize; + const maxAlignedBytes = maxBytesFilled - remainderBytes; + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) { + totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled; + ready = true; + } + const queue = controller._queue; + while (totalBytesToCopyRemaining > 0) { + const headOfQueue = queue.peek(); + const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength); + const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy); + if (headOfQueue.byteLength === bytesToCopy) { + queue.shift(); + } + else { + headOfQueue.byteOffset += bytesToCopy; + headOfQueue.byteLength -= bytesToCopy; + } + controller._queueTotalSize -= bytesToCopy; + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor); + totalBytesToCopyRemaining -= bytesToCopy; + } + return ready; +} +function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) { + pullIntoDescriptor.bytesFilled += size; +} +function ReadableByteStreamControllerHandleQueueDrain(controller) { + if (controller._queueTotalSize === 0 && controller._closeRequested) { + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(controller._controlledReadableByteStream); + } + else { + ReadableByteStreamControllerCallPullIfNeeded(controller); + } +} +function ReadableByteStreamControllerInvalidateBYOBRequest(controller) { + if (controller._byobRequest === null) { + return; + } + controller._byobRequest._associatedReadableByteStreamController = undefined; + controller._byobRequest._view = null; + controller._byobRequest = null; +} +function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) { + while (controller._pendingPullIntos.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const pullIntoDescriptor = controller._pendingPullIntos.peek(); + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + } + } +} +function ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller) { + const reader = controller._controlledReadableByteStream._reader; + while (reader._readRequests.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const readRequest = reader._readRequests.shift(); + ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest); + } +} +function ReadableByteStreamControllerPullInto(controller, view, min, readIntoRequest) { + const stream = controller._controlledReadableByteStream; + const ctor = view.constructor; + const elementSize = arrayBufferViewElementSize(ctor); + const { byteOffset, byteLength } = view; + const minimumFill = min * elementSize; + let buffer; + try { + buffer = TransferArrayBuffer(view.buffer); + } + catch (e) { + readIntoRequest._errorSteps(e); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: buffer.byteLength, + byteOffset, + byteLength, + bytesFilled: 0, + minimumFill, + elementSize, + viewConstructor: ctor, + readerType: 'byob' + }; + if (controller._pendingPullIntos.length > 0) { + controller._pendingPullIntos.push(pullIntoDescriptor); + // No ReadableByteStreamControllerCallPullIfNeeded() call since: + // - No change happens on desiredSize + // - The source has already been notified of that there's at least 1 pending read(view) + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + return; + } + if (stream._state === 'closed') { + const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0); + readIntoRequest._closeSteps(emptyView); + return; + } + if (controller._queueTotalSize > 0) { + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + ReadableByteStreamControllerHandleQueueDrain(controller); + readIntoRequest._chunkSteps(filledView); + return; + } + if (controller._closeRequested) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + readIntoRequest._errorSteps(e); + return; + } + } + controller._pendingPullIntos.push(pullIntoDescriptor); + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) { + if (firstDescriptor.readerType === 'none') { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const stream = controller._controlledReadableByteStream; + if (ReadableStreamHasBYOBReader(stream)) { + while (ReadableStreamGetNumReadIntoRequests(stream) > 0) { + const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor); + } + } +} +function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) { + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + return; + } + if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) { + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + return; + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize; + if (remainderSize > 0) { + const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, pullIntoDescriptor.buffer, end - remainderSize, remainderSize); + } + pullIntoDescriptor.bytesFilled -= remainderSize; + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); +} +function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor); + } + else { + ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerShiftPendingPullInto(controller) { + const descriptor = controller._pendingPullIntos.shift(); + return descriptor; +} +function ReadableByteStreamControllerShouldCallPull(controller) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return false; + } + if (controller._closeRequested) { + return false; + } + if (!controller._started) { + return false; + } + if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; +} +function ReadableByteStreamControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; +} +// A client of ReadableByteStreamController may use these functions directly to bypass state check. +function ReadableByteStreamControllerClose(controller) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + if (controller._queueTotalSize > 0) { + controller._closeRequested = true; + return; + } + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + throw e; + } + } + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(stream); +} +function ReadableByteStreamControllerEnqueue(controller, chunk) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + const { buffer, byteOffset, byteLength } = chunk; + if (IsDetachedBuffer(buffer)) { + throw new TypeError('chunk\'s buffer is detached and so cannot be enqueued'); + } + const transferredBuffer = TransferArrayBuffer(buffer); + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (IsDetachedBuffer(firstPendingPullInto.buffer)) { + throw new TypeError('The BYOB request\'s buffer has been detached and so cannot be filled with an enqueued chunk'); + } + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer); + if (firstPendingPullInto.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto); + } + } + if (ReadableStreamHasDefaultReader(stream)) { + ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller); + if (ReadableStreamGetNumReadRequests(stream) === 0) { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + else { + if (controller._pendingPullIntos.length > 0) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength); + ReadableStreamFulfillReadRequest(stream, transferredView, false); + } + } + else if (ReadableStreamHasBYOBReader(stream)) { + // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully. + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + else { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerError(controller, e) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return; + } + ReadableByteStreamControllerClearPendingPullIntos(controller); + ResetQueue(controller); + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); +} +function ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest) { + const entry = controller._queue.shift(); + controller._queueTotalSize -= entry.byteLength; + ReadableByteStreamControllerHandleQueueDrain(controller); + const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength); + readRequest._chunkSteps(view); +} +function ReadableByteStreamControllerGetBYOBRequest(controller) { + if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled); + const byobRequest = Object.create(ReadableStreamBYOBRequest.prototype); + SetUpReadableStreamBYOBRequest(byobRequest, controller, view); + controller._byobRequest = byobRequest; + } + return controller._byobRequest; +} +function ReadableByteStreamControllerGetDesiredSize(controller) { + const state = controller._controlledReadableByteStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; +} +function ReadableByteStreamControllerRespond(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (bytesWritten !== 0) { + throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream'); + } + } + else { + if (bytesWritten === 0) { + throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream'); + } + if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) { + throw new RangeError('bytesWritten out of range'); + } + } + firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer); + ReadableByteStreamControllerRespondInternal(controller, bytesWritten); +} +function ReadableByteStreamControllerRespondWithNewView(controller, view) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (view.byteLength !== 0) { + throw new TypeError('The view\'s length must be 0 when calling respondWithNewView() on a closed stream'); + } + } + else { + if (view.byteLength === 0) { + throw new TypeError('The view\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'); + } + } + if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) { + throw new RangeError('The region specified by view does not match byobRequest'); + } + if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) { + throw new RangeError('The buffer of view has different capacity than byobRequest'); + } + if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) { + throw new RangeError('The region specified by view is larger than byobRequest'); + } + const viewByteLength = view.byteLength; + firstDescriptor.buffer = TransferArrayBuffer(view.buffer); + ReadableByteStreamControllerRespondInternal(controller, viewByteLength); +} +function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) { + controller._controlledReadableByteStream = stream; + controller._pullAgain = false; + controller._pulling = false; + controller._byobRequest = null; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._closeRequested = false; + controller._started = false; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._autoAllocateChunkSize = autoAllocateChunkSize; + controller._pendingPullIntos = new SimpleQueue(); + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableByteStreamControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableByteStreamControllerError(controller, r); + return null; + }); +} +function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) { + const controller = Object.create(ReadableByteStreamController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingByteSource.start !== undefined) { + startAlgorithm = () => underlyingByteSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingByteSource.pull !== undefined) { + pullAlgorithm = () => underlyingByteSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingByteSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingByteSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize; + if (autoAllocateChunkSize === 0) { + throw new TypeError('autoAllocateChunkSize must be greater than 0'); + } + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize); +} +function SetUpReadableStreamBYOBRequest(request, controller, view) { + request._associatedReadableByteStreamController = controller; + request._view = view; +} +// Helper functions for the ReadableStreamBYOBRequest. +function byobRequestBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`); +} +// Helper functions for the ReadableByteStreamController. +function byteStreamControllerBrandCheckException(name) { + return new TypeError(`ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`); +} + +function convertReaderOptions(options, context) { + assertDictionary(options, context); + const mode = options === null || options === void 0 ? void 0 : options.mode; + return { + mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`) + }; +} +function convertReadableStreamReaderMode(mode, context) { + mode = `${mode}`; + if (mode !== 'byob') { + throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`); + } + return mode; +} +function convertByobReadOptions(options, context) { + var _a; + assertDictionary(options, context); + const min = (_a = options === null || options === void 0 ? void 0 : options.min) !== null && _a !== void 0 ? _a : 1; + return { + min: convertUnsignedLongLongWithEnforceRange(min, `${context} has member 'min' that`) + }; +} + +// Abstract operations for the ReadableStream. +function AcquireReadableStreamBYOBReader(stream) { + return new ReadableStreamBYOBReader(stream); +} +// ReadableStream API exposed for controllers. +function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) { + stream._reader._readIntoRequests.push(readIntoRequest); +} +function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) { + const reader = stream._reader; + const readIntoRequest = reader._readIntoRequests.shift(); + if (done) { + readIntoRequest._closeSteps(chunk); + } + else { + readIntoRequest._chunkSteps(chunk); + } +} +function ReadableStreamGetNumReadIntoRequests(stream) { + return stream._reader._readIntoRequests.length; +} +function ReadableStreamHasBYOBReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamBYOBReader(reader)) { + return false; + } + return true; +} +/** + * A BYOB reader vended by a {@link ReadableStream}. + * + * @public + */ +class ReadableStreamBYOBReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + if (!IsReadableByteStreamController(stream._readableStreamController)) { + throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' + + 'source'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readIntoRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + read(view, rawOptions = {}) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('read')); + } + if (!ArrayBuffer.isView(view)) { + return promiseRejectedWith(new TypeError('view must be an array buffer view')); + } + if (view.byteLength === 0) { + return promiseRejectedWith(new TypeError('view must have non-zero byteLength')); + } + if (view.buffer.byteLength === 0) { + return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`)); + } + if (IsDetachedBuffer(view.buffer)) { + return promiseRejectedWith(new TypeError('view\'s buffer has been detached')); + } + let options; + try { + options = convertByobReadOptions(rawOptions, 'options'); + } + catch (e) { + return promiseRejectedWith(e); + } + const min = options.min; + if (min === 0) { + return promiseRejectedWith(new TypeError('options.min must be greater than 0')); + } + if (!isDataView(view)) { + if (min > view.length) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s length')); + } + } + else if (min > view.byteLength) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s byteLength')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readIntoRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: chunk => resolvePromise({ value: chunk, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamBYOBReader(this)) { + throw byobReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamBYOBReaderRelease(this); + } +} +Object.defineProperties(ReadableStreamBYOBReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } +}); +setFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel'); +setFunctionName(ReadableStreamBYOBReader.prototype.read, 'read'); +setFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBReader', + configurable: true + }); +} +// Abstract operations for the readers. +function IsReadableStreamBYOBReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) { + return false; + } + return x instanceof ReadableStreamBYOBReader; +} +function ReadableStreamBYOBReaderRead(reader, view, min, readIntoRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'errored') { + readIntoRequest._errorSteps(stream._storedError); + } + else { + ReadableByteStreamControllerPullInto(stream._readableStreamController, view, min, readIntoRequest); + } +} +function ReadableStreamBYOBReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); +} +function ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._errorSteps(e); + }); +} +// Helper functions for the ReadableStreamBYOBReader. +function byobReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`); +} + +function ExtractHighWaterMark(strategy, defaultHWM) { + const { highWaterMark } = strategy; + if (highWaterMark === undefined) { + return defaultHWM; + } + if (NumberIsNaN(highWaterMark) || highWaterMark < 0) { + throw new RangeError('Invalid highWaterMark'); + } + return highWaterMark; +} +function ExtractSizeAlgorithm(strategy) { + const { size } = strategy; + if (!size) { + return () => 1; + } + return size; +} + +function convertQueuingStrategy(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + const size = init === null || init === void 0 ? void 0 : init.size; + return { + highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark), + size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`) + }; +} +function convertQueuingStrategySize(fn, context) { + assertFunction(fn, context); + return chunk => convertUnrestrictedDouble(fn(chunk)); +} + +function convertUnderlyingSink(original, context) { + assertDictionary(original, context); + const abort = original === null || original === void 0 ? void 0 : original.abort; + const close = original === null || original === void 0 ? void 0 : original.close; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + const write = original === null || original === void 0 ? void 0 : original.write; + return { + abort: abort === undefined ? + undefined : + convertUnderlyingSinkAbortCallback(abort, original, `${context} has member 'abort' that`), + close: close === undefined ? + undefined : + convertUnderlyingSinkCloseCallback(close, original, `${context} has member 'close' that`), + start: start === undefined ? + undefined : + convertUnderlyingSinkStartCallback(start, original, `${context} has member 'start' that`), + write: write === undefined ? + undefined : + convertUnderlyingSinkWriteCallback(write, original, `${context} has member 'write' that`), + type + }; +} +function convertUnderlyingSinkAbortCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); +} +function convertUnderlyingSinkCloseCallback(fn, original, context) { + assertFunction(fn, context); + return () => promiseCall(fn, original, []); +} +function convertUnderlyingSinkStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); +} +function convertUnderlyingSinkWriteCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); +} + +function assertWritableStream(x, context) { + if (!IsWritableStream(x)) { + throw new TypeError(`${context} is not a WritableStream.`); + } +} + +function isAbortSignal(value) { + if (typeof value !== 'object' || value === null) { + return false; + } + try { + return typeof value.aborted === 'boolean'; + } + catch (_a) { + // AbortSignal.prototype.aborted throws if its brand check fails + return false; + } +} +const supportsAbortController = typeof AbortController === 'function'; +/** + * Construct a new AbortController, if supported by the platform. + * + * @internal + */ +function createAbortController() { + if (supportsAbortController) { + return new AbortController(); + } + return undefined; +} + +/** + * A writable stream represents a destination for data, into which you can write. + * + * @public + */ +class WritableStream { + constructor(rawUnderlyingSink = {}, rawStrategy = {}) { + if (rawUnderlyingSink === undefined) { + rawUnderlyingSink = null; + } + else { + assertObject(rawUnderlyingSink, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter'); + InitializeWritableStream(this); + const type = underlyingSink.type; + if (type !== undefined) { + throw new RangeError('Invalid type is specified'); + } + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm); + } + /** + * Returns whether or not the writable stream is locked to a writer. + */ + get locked() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('locked'); + } + return IsWritableStreamLocked(this); + } + /** + * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be + * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort + * mechanism of the underlying sink. + * + * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled + * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel + * the stream) if the stream is currently locked. + */ + abort(reason = undefined) { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('abort')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer')); + } + return WritableStreamAbort(this, reason); + } + /** + * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its + * close behavior. During this time any further attempts to write will fail (without erroring the stream). + * + * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream + * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with + * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked. + */ + close() { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('close')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer')); + } + if (WritableStreamCloseQueuedOrInFlight(this)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamClose(this); + } + /** + * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream + * is locked, no other writer can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to write to a stream + * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at + * the same time, which would cause the resulting written data to be unpredictable and probably useless. + */ + getWriter() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('getWriter'); + } + return AcquireWritableStreamDefaultWriter(this); + } +} +Object.defineProperties(WritableStream.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + getWriter: { enumerable: true }, + locked: { enumerable: true } +}); +setFunctionName(WritableStream.prototype.abort, 'abort'); +setFunctionName(WritableStream.prototype.close, 'close'); +setFunctionName(WritableStream.prototype.getWriter, 'getWriter'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, { + value: 'WritableStream', + configurable: true + }); +} +// Abstract operations for the WritableStream. +function AcquireWritableStreamDefaultWriter(stream) { + return new WritableStreamDefaultWriter(stream); +} +// Throws if and only if startAlgorithm throws. +function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(WritableStream.prototype); + InitializeWritableStream(stream); + const controller = Object.create(WritableStreamDefaultController.prototype); + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + return stream; +} +function InitializeWritableStream(stream) { + stream._state = 'writable'; + // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is + // 'erroring' or 'errored'. May be set to an undefined value. + stream._storedError = undefined; + stream._writer = undefined; + // Initialize to undefined first because the constructor of the controller checks this + // variable to validate the caller. + stream._writableStreamController = undefined; + // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data + // producer without waiting for the queued writes to finish. + stream._writeRequests = new SimpleQueue(); + // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents + // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here. + stream._inFlightWriteRequest = undefined; + // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer + // has been detached. + stream._closeRequest = undefined; + // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it + // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here. + stream._inFlightCloseRequest = undefined; + // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached. + stream._pendingAbortRequest = undefined; + // The backpressure signal set by the controller. + stream._backpressure = false; +} +function IsWritableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) { + return false; + } + return x instanceof WritableStream; +} +function IsWritableStreamLocked(stream) { + if (stream._writer === undefined) { + return false; + } + return true; +} +function WritableStreamAbort(stream, reason) { + var _a; + if (stream._state === 'closed' || stream._state === 'errored') { + return promiseResolvedWith(undefined); + } + stream._writableStreamController._abortReason = reason; + (_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort(reason); + // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring', + // but it doesn't know that signaling abort runs author code that might have changed the state. + // Widen the type again by casting to WritableStreamState. + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseResolvedWith(undefined); + } + if (stream._pendingAbortRequest !== undefined) { + return stream._pendingAbortRequest._promise; + } + let wasAlreadyErroring = false; + if (state === 'erroring') { + wasAlreadyErroring = true; + // reason will not be used, so don't keep a reference to it. + reason = undefined; + } + const promise = newPromise((resolve, reject) => { + stream._pendingAbortRequest = { + _promise: undefined, + _resolve: resolve, + _reject: reject, + _reason: reason, + _wasAlreadyErroring: wasAlreadyErroring + }; + }); + stream._pendingAbortRequest._promise = promise; + if (!wasAlreadyErroring) { + WritableStreamStartErroring(stream, reason); + } + return promise; +} +function WritableStreamClose(stream) { + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseRejectedWith(new TypeError(`The stream (in ${state} state) is not in the writable state and cannot be closed`)); + } + const promise = newPromise((resolve, reject) => { + const closeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._closeRequest = closeRequest; + }); + const writer = stream._writer; + if (writer !== undefined && stream._backpressure && state === 'writable') { + defaultWriterReadyPromiseResolve(writer); + } + WritableStreamDefaultControllerClose(stream._writableStreamController); + return promise; +} +// WritableStream API exposed for controllers. +function WritableStreamAddWriteRequest(stream) { + const promise = newPromise((resolve, reject) => { + const writeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._writeRequests.push(writeRequest); + }); + return promise; +} +function WritableStreamDealWithRejection(stream, error) { + const state = stream._state; + if (state === 'writable') { + WritableStreamStartErroring(stream, error); + return; + } + WritableStreamFinishErroring(stream); +} +function WritableStreamStartErroring(stream, reason) { + const controller = stream._writableStreamController; + stream._state = 'erroring'; + stream._storedError = reason; + const writer = stream._writer; + if (writer !== undefined) { + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason); + } + if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) { + WritableStreamFinishErroring(stream); + } +} +function WritableStreamFinishErroring(stream) { + stream._state = 'errored'; + stream._writableStreamController[ErrorSteps](); + const storedError = stream._storedError; + stream._writeRequests.forEach(writeRequest => { + writeRequest._reject(storedError); + }); + stream._writeRequests = new SimpleQueue(); + if (stream._pendingAbortRequest === undefined) { + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const abortRequest = stream._pendingAbortRequest; + stream._pendingAbortRequest = undefined; + if (abortRequest._wasAlreadyErroring) { + abortRequest._reject(storedError); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const promise = stream._writableStreamController[AbortSteps](abortRequest._reason); + uponPromise(promise, () => { + abortRequest._resolve(); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }, (reason) => { + abortRequest._reject(reason); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }); +} +function WritableStreamFinishInFlightWrite(stream) { + stream._inFlightWriteRequest._resolve(undefined); + stream._inFlightWriteRequest = undefined; +} +function WritableStreamFinishInFlightWriteWithError(stream, error) { + stream._inFlightWriteRequest._reject(error); + stream._inFlightWriteRequest = undefined; + WritableStreamDealWithRejection(stream, error); +} +function WritableStreamFinishInFlightClose(stream) { + stream._inFlightCloseRequest._resolve(undefined); + stream._inFlightCloseRequest = undefined; + const state = stream._state; + if (state === 'erroring') { + // The error was too late to do anything, so it is ignored. + stream._storedError = undefined; + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._resolve(); + stream._pendingAbortRequest = undefined; + } + } + stream._state = 'closed'; + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseResolve(writer); + } +} +function WritableStreamFinishInFlightCloseWithError(stream, error) { + stream._inFlightCloseRequest._reject(error); + stream._inFlightCloseRequest = undefined; + // Never execute sink abort() after sink close(). + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._reject(error); + stream._pendingAbortRequest = undefined; + } + WritableStreamDealWithRejection(stream, error); +} +// TODO(ricea): Fix alphabetical order. +function WritableStreamCloseQueuedOrInFlight(stream) { + if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; +} +function WritableStreamHasOperationMarkedInFlight(stream) { + if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; +} +function WritableStreamMarkCloseRequestInFlight(stream) { + stream._inFlightCloseRequest = stream._closeRequest; + stream._closeRequest = undefined; +} +function WritableStreamMarkFirstWriteRequestInFlight(stream) { + stream._inFlightWriteRequest = stream._writeRequests.shift(); +} +function WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) { + if (stream._closeRequest !== undefined) { + stream._closeRequest._reject(stream._storedError); + stream._closeRequest = undefined; + } + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseReject(writer, stream._storedError); + } +} +function WritableStreamUpdateBackpressure(stream, backpressure) { + const writer = stream._writer; + if (writer !== undefined && backpressure !== stream._backpressure) { + if (backpressure) { + defaultWriterReadyPromiseReset(writer); + } + else { + defaultWriterReadyPromiseResolve(writer); + } + } + stream._backpressure = backpressure; +} +/** + * A default writer vended by a {@link WritableStream}. + * + * @public + */ +class WritableStreamDefaultWriter { + constructor(stream) { + assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter'); + assertWritableStream(stream, 'First parameter'); + if (IsWritableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive writing by another writer'); + } + this._ownerWritableStream = stream; + stream._writer = this; + const state = stream._state; + if (state === 'writable') { + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) { + defaultWriterReadyPromiseInitialize(this); + } + else { + defaultWriterReadyPromiseInitializeAsResolved(this); + } + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'erroring') { + defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError); + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'closed') { + defaultWriterReadyPromiseInitializeAsResolved(this); + defaultWriterClosedPromiseInitializeAsResolved(this); + } + else { + const storedError = stream._storedError; + defaultWriterReadyPromiseInitializeAsRejected(this, storedError); + defaultWriterClosedPromiseInitializeAsRejected(this, storedError); + } + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the writer’s lock is released before the stream finishes closing. + */ + get closed() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full. + * A producer can use this information to determine the right amount of data to write. + * + * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort + * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when + * the writer’s lock is released. + */ + get desiredSize() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('desiredSize'); + } + if (this._ownerWritableStream === undefined) { + throw defaultWriterLockException('desiredSize'); + } + return WritableStreamDefaultWriterGetDesiredSize(this); + } + /** + * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions + * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips + * back to zero or below, the getter will return a new promise that stays pending until the next transition. + * + * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become + * rejected. + */ + get ready() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('ready')); + } + return this._readyPromise; + } + /** + * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}. + */ + abort(reason = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('abort')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('abort')); + } + return WritableStreamDefaultWriterAbort(this, reason); + } + /** + * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}. + */ + close() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('close')); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return promiseRejectedWith(defaultWriterLockException('close')); + } + if (WritableStreamCloseQueuedOrInFlight(stream)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamDefaultWriterClose(this); + } + /** + * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active. + * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from + * now on; otherwise, the writer will appear closed. + * + * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the + * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled). + * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents + * other producers from writing in an interleaved manner. + */ + releaseLock() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('releaseLock'); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return; + } + WritableStreamDefaultWriterRelease(this); + } + write(chunk = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('write')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + return WritableStreamDefaultWriterWrite(this, chunk); + } +} +Object.defineProperties(WritableStreamDefaultWriter.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + releaseLock: { enumerable: true }, + write: { enumerable: true }, + closed: { enumerable: true }, + desiredSize: { enumerable: true }, + ready: { enumerable: true } +}); +setFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort'); +setFunctionName(WritableStreamDefaultWriter.prototype.close, 'close'); +setFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock'); +setFunctionName(WritableStreamDefaultWriter.prototype.write, 'write'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultWriter', + configurable: true + }); +} +// Abstract operations for the WritableStreamDefaultWriter. +function IsWritableStreamDefaultWriter(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultWriter; +} +// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check. +function WritableStreamDefaultWriterAbort(writer, reason) { + const stream = writer._ownerWritableStream; + return WritableStreamAbort(stream, reason); +} +function WritableStreamDefaultWriterClose(writer) { + const stream = writer._ownerWritableStream; + return WritableStreamClose(stream); +} +function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseResolvedWith(undefined); + } + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + return WritableStreamDefaultWriterClose(writer); +} +function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) { + if (writer._closedPromiseState === 'pending') { + defaultWriterClosedPromiseReject(writer, error); + } + else { + defaultWriterClosedPromiseResetToRejected(writer, error); + } +} +function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) { + if (writer._readyPromiseState === 'pending') { + defaultWriterReadyPromiseReject(writer, error); + } + else { + defaultWriterReadyPromiseResetToRejected(writer, error); + } +} +function WritableStreamDefaultWriterGetDesiredSize(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (state === 'errored' || state === 'erroring') { + return null; + } + if (state === 'closed') { + return 0; + } + return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController); +} +function WritableStreamDefaultWriterRelease(writer) { + const stream = writer._ownerWritableStream; + const releasedError = new TypeError(`Writer was released and can no longer be used to monitor the stream's closedness`); + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError); + // The state transitions to "errored" before the sink abort() method runs, but the writer.closed promise is not + // rejected until afterwards. This means that simply testing state will not work. + WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError); + stream._writer = undefined; + writer._ownerWritableStream = undefined; +} +function WritableStreamDefaultWriterWrite(writer, chunk) { + const stream = writer._ownerWritableStream; + const controller = stream._writableStreamController; + const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk); + if (stream !== writer._ownerWritableStream) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + const state = stream._state; + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to')); + } + if (state === 'erroring') { + return promiseRejectedWith(stream._storedError); + } + const promise = WritableStreamAddWriteRequest(stream); + WritableStreamDefaultControllerWrite(controller, chunk, chunkSize); + return promise; +} +const closeSentinel = {}; +/** + * Allows control of a {@link WritableStream | writable stream}'s state and internal queue. + * + * @public + */ +class WritableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted. + * + * @deprecated + * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177. + * Use {@link WritableStreamDefaultController.signal}'s `reason` instead. + */ + get abortReason() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('abortReason'); + } + return this._abortReason; + } + /** + * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted. + */ + get signal() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('signal'); + } + if (this._abortController === undefined) { + // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`. + // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill, + // so instead we only implement support for `signal` if we find a global `AbortController` constructor. + throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported'); + } + return this._abortController.signal; + } + /** + * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`. + * + * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying + * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the + * normal lifecycle of interactions with the underlying sink. + */ + error(e = undefined) { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('error'); + } + const state = this._controlledWritableStream._state; + if (state !== 'writable') { + // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so + // just treat it as a no-op. + return; + } + WritableStreamDefaultControllerError(this, e); + } + /** @internal */ + [AbortSteps](reason) { + const result = this._abortAlgorithm(reason); + WritableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [ErrorSteps]() { + ResetQueue(this); + } +} +Object.defineProperties(WritableStreamDefaultController.prototype, { + abortReason: { enumerable: true }, + signal: { enumerable: true }, + error: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultController', + configurable: true + }); +} +// Abstract operations implementing interface required by the WritableStream. +function IsWritableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultController; +} +function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledWritableStream = stream; + stream._writableStreamController = controller; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._abortReason = undefined; + controller._abortController = createAbortController(); + controller._started = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._writeAlgorithm = writeAlgorithm; + controller._closeAlgorithm = closeAlgorithm; + controller._abortAlgorithm = abortAlgorithm; + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + const startResult = startAlgorithm(); + const startPromise = promiseResolvedWith(startResult); + uponPromise(startPromise, () => { + controller._started = true; + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, r => { + controller._started = true; + WritableStreamDealWithRejection(stream, r); + return null; + }); +} +function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) { + const controller = Object.create(WritableStreamDefaultController.prototype); + let startAlgorithm; + let writeAlgorithm; + let closeAlgorithm; + let abortAlgorithm; + if (underlyingSink.start !== undefined) { + startAlgorithm = () => underlyingSink.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSink.write !== undefined) { + writeAlgorithm = chunk => underlyingSink.write(chunk, controller); + } + else { + writeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.close !== undefined) { + closeAlgorithm = () => underlyingSink.close(); + } + else { + closeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.abort !== undefined) { + abortAlgorithm = reason => underlyingSink.abort(reason); + } + else { + abortAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); +} +// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls. +function WritableStreamDefaultControllerClearAlgorithms(controller) { + controller._writeAlgorithm = undefined; + controller._closeAlgorithm = undefined; + controller._abortAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; +} +function WritableStreamDefaultControllerClose(controller) { + EnqueueValueWithSize(controller, closeSentinel, 0); + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); +} +function WritableStreamDefaultControllerGetChunkSize(controller, chunk) { + try { + return controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE); + return 1; + } +} +function WritableStreamDefaultControllerGetDesiredSize(controller) { + return controller._strategyHWM - controller._queueTotalSize; +} +function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) { + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE); + return; + } + const stream = controller._controlledWritableStream; + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); +} +// Abstract operations for the WritableStreamDefaultController. +function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) { + const stream = controller._controlledWritableStream; + if (!controller._started) { + return; + } + if (stream._inFlightWriteRequest !== undefined) { + return; + } + const state = stream._state; + if (state === 'erroring') { + WritableStreamFinishErroring(stream); + return; + } + if (controller._queue.length === 0) { + return; + } + const value = PeekQueueValue(controller); + if (value === closeSentinel) { + WritableStreamDefaultControllerProcessClose(controller); + } + else { + WritableStreamDefaultControllerProcessWrite(controller, value); + } +} +function WritableStreamDefaultControllerErrorIfNeeded(controller, error) { + if (controller._controlledWritableStream._state === 'writable') { + WritableStreamDefaultControllerError(controller, error); + } +} +function WritableStreamDefaultControllerProcessClose(controller) { + const stream = controller._controlledWritableStream; + WritableStreamMarkCloseRequestInFlight(stream); + DequeueValue(controller); + const sinkClosePromise = controller._closeAlgorithm(); + WritableStreamDefaultControllerClearAlgorithms(controller); + uponPromise(sinkClosePromise, () => { + WritableStreamFinishInFlightClose(stream); + return null; + }, reason => { + WritableStreamFinishInFlightCloseWithError(stream, reason); + return null; + }); +} +function WritableStreamDefaultControllerProcessWrite(controller, chunk) { + const stream = controller._controlledWritableStream; + WritableStreamMarkFirstWriteRequestInFlight(stream); + const sinkWritePromise = controller._writeAlgorithm(chunk); + uponPromise(sinkWritePromise, () => { + WritableStreamFinishInFlightWrite(stream); + const state = stream._state; + DequeueValue(controller); + if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, reason => { + if (stream._state === 'writable') { + WritableStreamDefaultControllerClearAlgorithms(controller); + } + WritableStreamFinishInFlightWriteWithError(stream, reason); + return null; + }); +} +function WritableStreamDefaultControllerGetBackpressure(controller) { + const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller); + return desiredSize <= 0; +} +// A client of WritableStreamDefaultController may use these functions directly to bypass state check. +function WritableStreamDefaultControllerError(controller, error) { + const stream = controller._controlledWritableStream; + WritableStreamDefaultControllerClearAlgorithms(controller); + WritableStreamStartErroring(stream, error); +} +// Helper functions for the WritableStream. +function streamBrandCheckException$2(name) { + return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`); +} +// Helper functions for the WritableStreamDefaultController. +function defaultControllerBrandCheckException$2(name) { + return new TypeError(`WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`); +} +// Helper functions for the WritableStreamDefaultWriter. +function defaultWriterBrandCheckException(name) { + return new TypeError(`WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`); +} +function defaultWriterLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released writer'); +} +function defaultWriterClosedPromiseInitialize(writer) { + writer._closedPromise = newPromise((resolve, reject) => { + writer._closedPromise_resolve = resolve; + writer._closedPromise_reject = reject; + writer._closedPromiseState = 'pending'; + }); +} +function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseReject(writer, reason); +} +function defaultWriterClosedPromiseInitializeAsResolved(writer) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseResolve(writer); +} +function defaultWriterClosedPromiseReject(writer, reason) { + if (writer._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._closedPromise); + writer._closedPromise_reject(reason); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'rejected'; +} +function defaultWriterClosedPromiseResetToRejected(writer, reason) { + defaultWriterClosedPromiseInitializeAsRejected(writer, reason); +} +function defaultWriterClosedPromiseResolve(writer) { + if (writer._closedPromise_resolve === undefined) { + return; + } + writer._closedPromise_resolve(undefined); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'resolved'; +} +function defaultWriterReadyPromiseInitialize(writer) { + writer._readyPromise = newPromise((resolve, reject) => { + writer._readyPromise_resolve = resolve; + writer._readyPromise_reject = reject; + }); + writer._readyPromiseState = 'pending'; +} +function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseReject(writer, reason); +} +function defaultWriterReadyPromiseInitializeAsResolved(writer) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseResolve(writer); +} +function defaultWriterReadyPromiseReject(writer, reason) { + if (writer._readyPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._readyPromise); + writer._readyPromise_reject(reason); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'rejected'; +} +function defaultWriterReadyPromiseReset(writer) { + defaultWriterReadyPromiseInitialize(writer); +} +function defaultWriterReadyPromiseResetToRejected(writer, reason) { + defaultWriterReadyPromiseInitializeAsRejected(writer, reason); +} +function defaultWriterReadyPromiseResolve(writer) { + if (writer._readyPromise_resolve === undefined) { + return; + } + writer._readyPromise_resolve(undefined); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'fulfilled'; +} + +/// +function getGlobals() { + if (typeof globalThis !== 'undefined') { + return globalThis; + } + else if (typeof self !== 'undefined') { + return self; + } + else if (typeof global !== 'undefined') { + return global; + } + return undefined; +} +const globals = getGlobals(); + +/// +function isDOMExceptionConstructor(ctor) { + if (!(typeof ctor === 'function' || typeof ctor === 'object')) { + return false; + } + if (ctor.name !== 'DOMException') { + return false; + } + try { + new ctor(); + return true; + } + catch (_a) { + return false; + } +} +/** + * Support: + * - Web browsers + * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87) + */ +function getFromGlobal() { + const ctor = globals === null || globals === void 0 ? void 0 : globals.DOMException; + return isDOMExceptionConstructor(ctor) ? ctor : undefined; +} +/** + * Support: + * - All platforms + */ +function createPolyfill() { + // eslint-disable-next-line @typescript-eslint/no-shadow + const ctor = function DOMException(message, name) { + this.message = message || ''; + this.name = name || 'Error'; + if (Error.captureStackTrace) { + Error.captureStackTrace(this, this.constructor); + } + }; + setFunctionName(ctor, 'DOMException'); + ctor.prototype = Object.create(Error.prototype); + Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true }); + return ctor; +} +// eslint-disable-next-line @typescript-eslint/no-redeclare +const DOMException = getFromGlobal() || createPolyfill(); + +function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) { + const reader = AcquireReadableStreamDefaultReader(source); + const writer = AcquireWritableStreamDefaultWriter(dest); + source._disturbed = true; + let shuttingDown = false; + // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown. + let currentWrite = promiseResolvedWith(undefined); + return newPromise((resolve, reject) => { + let abortAlgorithm; + if (signal !== undefined) { + abortAlgorithm = () => { + const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError'); + const actions = []; + if (!preventAbort) { + actions.push(() => { + if (dest._state === 'writable') { + return WritableStreamAbort(dest, error); + } + return promiseResolvedWith(undefined); + }); + } + if (!preventCancel) { + actions.push(() => { + if (source._state === 'readable') { + return ReadableStreamCancel(source, error); + } + return promiseResolvedWith(undefined); + }); + } + shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error); + }; + if (signal.aborted) { + abortAlgorithm(); + return; + } + signal.addEventListener('abort', abortAlgorithm); + } + // Using reader and writer, read all chunks from this and write them to dest + // - Backpressure must be enforced + // - Shutdown must stop all activity + function pipeLoop() { + return newPromise((resolveLoop, rejectLoop) => { + function next(done) { + if (done) { + resolveLoop(); + } + else { + // Use `PerformPromiseThen` instead of `uponPromise` to avoid + // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers + PerformPromiseThen(pipeStep(), next, rejectLoop); + } + } + next(false); + }); + } + function pipeStep() { + if (shuttingDown) { + return promiseResolvedWith(true); + } + return PerformPromiseThen(writer._readyPromise, () => { + return newPromise((resolveRead, rejectRead) => { + ReadableStreamDefaultReaderRead(reader, { + _chunkSteps: chunk => { + currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop); + resolveRead(false); + }, + _closeSteps: () => resolveRead(true), + _errorSteps: rejectRead + }); + }); + }); + } + // Errors must be propagated forward + isOrBecomesErrored(source, reader._closedPromise, storedError => { + if (!preventAbort) { + shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Errors must be propagated backward + isOrBecomesErrored(dest, writer._closedPromise, storedError => { + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Closing must be propagated forward + isOrBecomesClosed(source, reader._closedPromise, () => { + if (!preventClose) { + shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer)); + } + else { + shutdown(); + } + return null; + }); + // Closing must be propagated backward + if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') { + const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it'); + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed); + } + else { + shutdown(true, destClosed); + } + } + setPromiseIsHandledToTrue(pipeLoop()); + function waitForWritesToFinish() { + // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait + // for that too. + const oldCurrentWrite = currentWrite; + return PerformPromiseThen(currentWrite, () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined); + } + function isOrBecomesErrored(stream, promise, action) { + if (stream._state === 'errored') { + action(stream._storedError); + } + else { + uponRejection(promise, action); + } + } + function isOrBecomesClosed(stream, promise, action) { + if (stream._state === 'closed') { + action(); + } + else { + uponFulfillment(promise, action); + } + } + function shutdownWithAction(action, originalIsError, originalError) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), doTheRest); + } + else { + doTheRest(); + } + function doTheRest() { + uponPromise(action(), () => finalize(originalIsError, originalError), newError => finalize(true, newError)); + return null; + } + } + function shutdown(isError, error) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error)); + } + else { + finalize(isError, error); + } + } + function finalize(isError, error) { + WritableStreamDefaultWriterRelease(writer); + ReadableStreamReaderGenericRelease(reader); + if (signal !== undefined) { + signal.removeEventListener('abort', abortAlgorithm); + } + if (isError) { + reject(error); + } + else { + resolve(undefined); + } + return null; + } + }); +} + +/** + * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue. + * + * @public + */ +class ReadableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('desiredSize'); + } + return ReadableStreamDefaultControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('close'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits close'); + } + ReadableStreamDefaultControllerClose(this); + } + enqueue(chunk = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('enqueue'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits enqueue'); + } + return ReadableStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('error'); + } + ReadableStreamDefaultControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableStream; + if (this._queue.length > 0) { + const chunk = DequeueValue(this); + if (this._closeRequested && this._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(this); + ReadableStreamClose(stream); + } + else { + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + readRequest._chunkSteps(chunk); + } + else { + ReadableStreamAddReadRequest(stream, readRequest); + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + } + /** @internal */ + [ReleaseSteps]() { + // Do nothing. + } +} +Object.defineProperties(ReadableStreamDefaultController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(ReadableStreamDefaultController.prototype.close, 'close'); +setFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue'); +setFunctionName(ReadableStreamDefaultController.prototype.error, 'error'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultController', + configurable: true + }); +} +// Abstract operations for the ReadableStreamDefaultController. +function IsReadableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) { + return false; + } + return x instanceof ReadableStreamDefaultController; +} +function ReadableStreamDefaultControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableStreamDefaultControllerError(controller, e); + return null; + }); +} +function ReadableStreamDefaultControllerShouldCallPull(controller) { + const stream = controller._controlledReadableStream; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return false; + } + if (!controller._started) { + return false; + } + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; +} +function ReadableStreamDefaultControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; +} +// A client of ReadableStreamDefaultController may use these functions directly to bypass state check. +function ReadableStreamDefaultControllerClose(controller) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + controller._closeRequested = true; + if (controller._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } +} +function ReadableStreamDefaultControllerEnqueue(controller, chunk) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + ReadableStreamFulfillReadRequest(stream, chunk, false); + } + else { + let chunkSize; + try { + chunkSize = controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + ReadableStreamDefaultControllerError(controller, chunkSizeE); + throw chunkSizeE; + } + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + ReadableStreamDefaultControllerError(controller, enqueueE); + throw enqueueE; + } + } + ReadableStreamDefaultControllerCallPullIfNeeded(controller); +} +function ReadableStreamDefaultControllerError(controller, e) { + const stream = controller._controlledReadableStream; + if (stream._state !== 'readable') { + return; + } + ResetQueue(controller); + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); +} +function ReadableStreamDefaultControllerGetDesiredSize(controller) { + const state = controller._controlledReadableStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; +} +// This is used in the implementation of TransformStream. +function ReadableStreamDefaultControllerHasBackpressure(controller) { + if (ReadableStreamDefaultControllerShouldCallPull(controller)) { + return false; + } + return true; +} +function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) { + const state = controller._controlledReadableStream._state; + if (!controller._closeRequested && state === 'readable') { + return true; + } + return false; +} +function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledReadableStream = stream; + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._started = false; + controller._closeRequested = false; + controller._pullAgain = false; + controller._pulling = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableStreamDefaultControllerError(controller, r); + return null; + }); +} +function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) { + const controller = Object.create(ReadableStreamDefaultController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingSource.start !== undefined) { + startAlgorithm = () => underlyingSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSource.pull !== undefined) { + pullAlgorithm = () => underlyingSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); +} +// Helper functions for the ReadableStreamDefaultController. +function defaultControllerBrandCheckException$1(name) { + return new TypeError(`ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`); +} + +function ReadableStreamTee(stream, cloneForBranch2) { + if (IsReadableByteStreamController(stream._readableStreamController)) { + return ReadableByteStreamTee(stream); + } + return ReadableStreamDefaultTee(stream); +} +function ReadableStreamDefaultTee(stream, cloneForBranch2) { + const reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgain = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function pullAlgorithm() { + if (reading) { + readAgain = true; + return promiseResolvedWith(undefined); + } + reading = true; + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgain = false; + const chunk1 = chunk; + const chunk2 = chunk; + // There is no way to access the cloning code right now in the reference implementation. + // If we add one then we'll need an implementation for serializable objects. + // if (!canceled2 && cloneForBranch2) { + // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2)); + // } + if (!canceled1) { + ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgain) { + pullAlgorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableStreamDefaultControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableStreamDefaultControllerClose(branch2._readableStreamController); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + // do nothing + } + branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm); + branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm); + uponRejection(reader._closedPromise, (r) => { + ReadableStreamDefaultControllerError(branch1._readableStreamController, r); + ReadableStreamDefaultControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + return [branch1, branch2]; +} +function ReadableByteStreamTee(stream) { + let reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgainForBranch1 = false; + let readAgainForBranch2 = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function forwardReaderError(thisReader) { + uponRejection(thisReader._closedPromise, r => { + if (thisReader !== reader) { + return null; + } + ReadableByteStreamControllerError(branch1._readableStreamController, r); + ReadableByteStreamControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + } + function pullWithDefaultReader() { + if (IsReadableStreamBYOBReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamDefaultReader(stream); + forwardReaderError(reader); + } + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const chunk1 = chunk; + let chunk2 = chunk; + if (!canceled1 && !canceled2) { + try { + chunk2 = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(branch1._readableStreamController, cloneE); + ReadableByteStreamControllerError(branch2._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + } + if (!canceled1) { + ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableByteStreamControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableByteStreamControllerClose(branch2._readableStreamController); + } + if (branch1._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch1._readableStreamController, 0); + } + if (branch2._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch2._readableStreamController, 0); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + } + function pullWithBYOBReader(view, forBranch2) { + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamBYOBReader(stream); + forwardReaderError(reader); + } + const byobBranch = forBranch2 ? branch2 : branch1; + const otherBranch = forBranch2 ? branch1 : branch2; + const readIntoRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!otherCanceled) { + let clonedChunk; + try { + clonedChunk = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE); + ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk); + } + else if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: chunk => { + reading = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!byobCanceled) { + ReadableByteStreamControllerClose(byobBranch._readableStreamController); + } + if (!otherCanceled) { + ReadableByteStreamControllerClose(otherBranch._readableStreamController); + } + if (chunk !== undefined) { + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0); + } + } + if (!byobCanceled || !otherCanceled) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest); + } + function pull1Algorithm() { + if (reading) { + readAgainForBranch1 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, false); + } + return promiseResolvedWith(undefined); + } + function pull2Algorithm() { + if (reading) { + readAgainForBranch2 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, true); + } + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + return; + } + branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm); + branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm); + forwardReaderError(reader); + return [branch1, branch2]; +} + +function isReadableStreamLike(stream) { + return typeIsObject(stream) && typeof stream.getReader !== 'undefined'; +} + +function ReadableStreamFrom(source) { + if (isReadableStreamLike(source)) { + return ReadableStreamFromDefaultReader(source.getReader()); + } + return ReadableStreamFromIterable(source); +} +function ReadableStreamFromIterable(asyncIterable) { + let stream; + const iteratorRecord = GetIterator(asyncIterable, 'async'); + const startAlgorithm = noop; + function pullAlgorithm() { + let nextResult; + try { + nextResult = IteratorNext(iteratorRecord); + } + catch (e) { + return promiseRejectedWith(e); + } + const nextPromise = promiseResolvedWith(nextResult); + return transformPromiseWith(nextPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object'); + } + const done = IteratorComplete(iterResult); + if (done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = IteratorValue(iterResult); + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + const iterator = iteratorRecord.iterator; + let returnMethod; + try { + returnMethod = GetMethod(iterator, 'return'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (returnMethod === undefined) { + return promiseResolvedWith(undefined); + } + let returnResult; + try { + returnResult = reflectCall(returnMethod, iterator, [reason]); + } + catch (e) { + return promiseRejectedWith(e); + } + const returnPromise = promiseResolvedWith(returnResult); + return transformPromiseWith(returnPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object'); + } + return undefined; + }); + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; +} +function ReadableStreamFromDefaultReader(reader) { + let stream; + const startAlgorithm = noop; + function pullAlgorithm() { + let readPromise; + try { + readPromise = reader.read(); + } + catch (e) { + return promiseRejectedWith(e); + } + return transformPromiseWith(readPromise, readResult => { + if (!typeIsObject(readResult)) { + throw new TypeError('The promise returned by the reader.read() method must fulfill with an object'); + } + if (readResult.done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = readResult.value; + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + try { + return promiseResolvedWith(reader.cancel(reason)); + } + catch (e) { + return promiseRejectedWith(e); + } + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; +} + +function convertUnderlyingDefaultOrByteSource(source, context) { + assertDictionary(source, context); + const original = source; + const autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize; + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const pull = original === null || original === void 0 ? void 0 : original.pull; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + return { + autoAllocateChunkSize: autoAllocateChunkSize === undefined ? + undefined : + convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, `${context} has member 'autoAllocateChunkSize' that`), + cancel: cancel === undefined ? + undefined : + convertUnderlyingSourceCancelCallback(cancel, original, `${context} has member 'cancel' that`), + pull: pull === undefined ? + undefined : + convertUnderlyingSourcePullCallback(pull, original, `${context} has member 'pull' that`), + start: start === undefined ? + undefined : + convertUnderlyingSourceStartCallback(start, original, `${context} has member 'start' that`), + type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`) + }; +} +function convertUnderlyingSourceCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); +} +function convertUnderlyingSourcePullCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); +} +function convertUnderlyingSourceStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); +} +function convertReadableStreamType(type, context) { + type = `${type}`; + if (type !== 'bytes') { + throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`); + } + return type; +} + +function convertIteratorOptions(options, context) { + assertDictionary(options, context); + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + return { preventCancel: Boolean(preventCancel) }; +} + +function convertPipeOptions(options, context) { + assertDictionary(options, context); + const preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort; + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + const preventClose = options === null || options === void 0 ? void 0 : options.preventClose; + const signal = options === null || options === void 0 ? void 0 : options.signal; + if (signal !== undefined) { + assertAbortSignal(signal, `${context} has member 'signal' that`); + } + return { + preventAbort: Boolean(preventAbort), + preventCancel: Boolean(preventCancel), + preventClose: Boolean(preventClose), + signal + }; +} +function assertAbortSignal(signal, context) { + if (!isAbortSignal(signal)) { + throw new TypeError(`${context} is not an AbortSignal.`); + } +} + +function convertReadableWritablePair(pair, context) { + assertDictionary(pair, context); + const readable = pair === null || pair === void 0 ? void 0 : pair.readable; + assertRequiredField(readable, 'readable', 'ReadableWritablePair'); + assertReadableStream(readable, `${context} has member 'readable' that`); + const writable = pair === null || pair === void 0 ? void 0 : pair.writable; + assertRequiredField(writable, 'writable', 'ReadableWritablePair'); + assertWritableStream(writable, `${context} has member 'writable' that`); + return { readable, writable }; +} + +/** + * A readable stream represents a source of data, from which you can read. + * + * @public + */ +class ReadableStream { + constructor(rawUnderlyingSource = {}, rawStrategy = {}) { + if (rawUnderlyingSource === undefined) { + rawUnderlyingSource = null; + } + else { + assertObject(rawUnderlyingSource, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter'); + InitializeReadableStream(this); + if (underlyingSource.type === 'bytes') { + if (strategy.size !== undefined) { + throw new RangeError('The strategy for a byte stream cannot have a size function'); + } + const highWaterMark = ExtractHighWaterMark(strategy, 0); + SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark); + } + else { + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm); + } + } + /** + * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}. + */ + get locked() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('locked'); + } + return IsReadableStreamLocked(this); + } + /** + * Cancels the stream, signaling a loss of interest in the stream by a consumer. + * + * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()} + * method, which might or might not use it. + */ + cancel(reason = undefined) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('cancel')); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader')); + } + return ReadableStreamCancel(this, reason); + } + getReader(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('getReader'); + } + const options = convertReaderOptions(rawOptions, 'First parameter'); + if (options.mode === undefined) { + return AcquireReadableStreamDefaultReader(this); + } + return AcquireReadableStreamBYOBReader(this); + } + pipeThrough(rawTransform, rawOptions = {}) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('pipeThrough'); + } + assertRequiredArgument(rawTransform, 1, 'pipeThrough'); + const transform = convertReadableWritablePair(rawTransform, 'First parameter'); + const options = convertPipeOptions(rawOptions, 'Second parameter'); + if (IsReadableStreamLocked(this)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream'); + } + if (IsWritableStreamLocked(transform.writable)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream'); + } + const promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + setPromiseIsHandledToTrue(promise); + return transform.readable; + } + pipeTo(destination, rawOptions = {}) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('pipeTo')); + } + if (destination === undefined) { + return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`); + } + if (!IsWritableStream(destination)) { + return promiseRejectedWith(new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)); + } + let options; + try { + options = convertPipeOptions(rawOptions, 'Second parameter'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')); + } + if (IsWritableStreamLocked(destination)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')); + } + return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + } + /** + * Tees this readable stream, returning a two-element array containing the two resulting branches as + * new {@link ReadableStream} instances. + * + * Teeing a stream will lock it, preventing any other consumer from acquiring a reader. + * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be + * propagated to the stream's underlying source. + * + * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable, + * this could allow interference between the two branches. + */ + tee() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('tee'); + } + const branches = ReadableStreamTee(this); + return CreateArrayFromList(branches); + } + values(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('values'); + } + const options = convertIteratorOptions(rawOptions, 'First parameter'); + return AcquireReadableStreamAsyncIterator(this, options.preventCancel); + } + [SymbolAsyncIterator](options) { + // Stub implementation, overridden below + return this.values(options); + } + /** + * Creates a new ReadableStream wrapping the provided iterable or async iterable. + * + * This can be used to adapt various kinds of objects into a readable stream, + * such as an array, an async generator, or a Node.js readable stream. + */ + static from(asyncIterable) { + return ReadableStreamFrom(asyncIterable); + } +} +Object.defineProperties(ReadableStream, { + from: { enumerable: true } +}); +Object.defineProperties(ReadableStream.prototype, { + cancel: { enumerable: true }, + getReader: { enumerable: true }, + pipeThrough: { enumerable: true }, + pipeTo: { enumerable: true }, + tee: { enumerable: true }, + values: { enumerable: true }, + locked: { enumerable: true } +}); +setFunctionName(ReadableStream.from, 'from'); +setFunctionName(ReadableStream.prototype.cancel, 'cancel'); +setFunctionName(ReadableStream.prototype.getReader, 'getReader'); +setFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough'); +setFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo'); +setFunctionName(ReadableStream.prototype.tee, 'tee'); +setFunctionName(ReadableStream.prototype.values, 'values'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, { + value: 'ReadableStream', + configurable: true + }); +} +Object.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, { + value: ReadableStream.prototype.values, + writable: true, + configurable: true +}); +// Abstract operations for the ReadableStream. +// Throws if and only if startAlgorithm throws. +function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableStreamDefaultController.prototype); + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + return stream; +} +// Throws if and only if startAlgorithm throws. +function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableByteStreamController.prototype); + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined); + return stream; +} +function InitializeReadableStream(stream) { + stream._state = 'readable'; + stream._reader = undefined; + stream._storedError = undefined; + stream._disturbed = false; +} +function IsReadableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) { + return false; + } + return x instanceof ReadableStream; +} +function IsReadableStreamLocked(stream) { + if (stream._reader === undefined) { + return false; + } + return true; +} +// ReadableStream API exposed for controllers. +function ReadableStreamCancel(stream, reason) { + stream._disturbed = true; + if (stream._state === 'closed') { + return promiseResolvedWith(undefined); + } + if (stream._state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + ReadableStreamClose(stream); + const reader = stream._reader; + if (reader !== undefined && IsReadableStreamBYOBReader(reader)) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._closeSteps(undefined); + }); + } + const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason); + return transformPromiseWith(sourceCancelPromise, noop); +} +function ReadableStreamClose(stream) { + stream._state = 'closed'; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseResolve(reader); + if (IsReadableStreamDefaultReader(reader)) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._closeSteps(); + }); + } +} +function ReadableStreamError(stream, e) { + stream._state = 'errored'; + stream._storedError = e; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseReject(reader, e); + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + else { + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } +} +// Helper functions for the ReadableStream. +function streamBrandCheckException$1(name) { + return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`); +} + +function convertQueuingStrategyInit(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit'); + return { + highWaterMark: convertUnrestrictedDouble(highWaterMark) + }; +} + +// The size function must not have a prototype property nor be a constructor +const byteLengthSizeFunction = (chunk) => { + return chunk.byteLength; +}; +setFunctionName(byteLengthSizeFunction, 'size'); +/** + * A queuing strategy that counts the number of bytes in each chunk. + * + * @public + */ +class ByteLengthQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('highWaterMark'); + } + return this._byteLengthQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by returning the value of its `byteLength` property. + */ + get size() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('size'); + } + return byteLengthSizeFunction; + } +} +Object.defineProperties(ByteLengthQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'ByteLengthQueuingStrategy', + configurable: true + }); +} +// Helper functions for the ByteLengthQueuingStrategy. +function byteLengthBrandCheckException(name) { + return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`); +} +function IsByteLengthQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof ByteLengthQueuingStrategy; +} + +// The size function must not have a prototype property nor be a constructor +const countSizeFunction = () => { + return 1; +}; +setFunctionName(countSizeFunction, 'size'); +/** + * A queuing strategy that counts the number of chunks. + * + * @public + */ +class CountQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'CountQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._countQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('highWaterMark'); + } + return this._countQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by always returning 1. + * This ensures that the total queue size is a count of the number of chunks in the queue. + */ + get size() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('size'); + } + return countSizeFunction; + } +} +Object.defineProperties(CountQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'CountQueuingStrategy', + configurable: true + }); +} +// Helper functions for the CountQueuingStrategy. +function countBrandCheckException(name) { + return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`); +} +function IsCountQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof CountQueuingStrategy; +} + +function convertTransformer(original, context) { + assertDictionary(original, context); + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const flush = original === null || original === void 0 ? void 0 : original.flush; + const readableType = original === null || original === void 0 ? void 0 : original.readableType; + const start = original === null || original === void 0 ? void 0 : original.start; + const transform = original === null || original === void 0 ? void 0 : original.transform; + const writableType = original === null || original === void 0 ? void 0 : original.writableType; + return { + cancel: cancel === undefined ? + undefined : + convertTransformerCancelCallback(cancel, original, `${context} has member 'cancel' that`), + flush: flush === undefined ? + undefined : + convertTransformerFlushCallback(flush, original, `${context} has member 'flush' that`), + readableType, + start: start === undefined ? + undefined : + convertTransformerStartCallback(start, original, `${context} has member 'start' that`), + transform: transform === undefined ? + undefined : + convertTransformerTransformCallback(transform, original, `${context} has member 'transform' that`), + writableType + }; +} +function convertTransformerFlushCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); +} +function convertTransformerStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); +} +function convertTransformerTransformCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); +} +function convertTransformerCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); +} + +// Class TransformStream +/** + * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream}, + * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side. + * In a manner specific to the transform stream in question, writes to the writable side result in new data being + * made available for reading from the readable side. + * + * @public + */ +class TransformStream { + constructor(rawTransformer = {}, rawWritableStrategy = {}, rawReadableStrategy = {}) { + if (rawTransformer === undefined) { + rawTransformer = null; + } + const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter'); + const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter'); + const transformer = convertTransformer(rawTransformer, 'First parameter'); + if (transformer.readableType !== undefined) { + throw new RangeError('Invalid readableType specified'); + } + if (transformer.writableType !== undefined) { + throw new RangeError('Invalid writableType specified'); + } + const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0); + const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy); + const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1); + const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy); + let startPromise_resolve; + const startPromise = newPromise(resolve => { + startPromise_resolve = resolve; + }); + InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + SetUpTransformStreamDefaultControllerFromTransformer(this, transformer); + if (transformer.start !== undefined) { + startPromise_resolve(transformer.start(this._transformStreamController)); + } + else { + startPromise_resolve(undefined); + } + } + /** + * The readable side of the transform stream. + */ + get readable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('readable'); + } + return this._readable; + } + /** + * The writable side of the transform stream. + */ + get writable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('writable'); + } + return this._writable; + } +} +Object.defineProperties(TransformStream.prototype, { + readable: { enumerable: true }, + writable: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, { + value: 'TransformStream', + configurable: true + }); +} +function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) { + function startAlgorithm() { + return startPromise; + } + function writeAlgorithm(chunk) { + return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk); + } + function abortAlgorithm(reason) { + return TransformStreamDefaultSinkAbortAlgorithm(stream, reason); + } + function closeAlgorithm() { + return TransformStreamDefaultSinkCloseAlgorithm(stream); + } + stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm); + function pullAlgorithm() { + return TransformStreamDefaultSourcePullAlgorithm(stream); + } + function cancelAlgorithm(reason) { + return TransformStreamDefaultSourceCancelAlgorithm(stream, reason); + } + stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure. + stream._backpressure = undefined; + stream._backpressureChangePromise = undefined; + stream._backpressureChangePromise_resolve = undefined; + TransformStreamSetBackpressure(stream, true); + stream._transformStreamController = undefined; +} +function IsTransformStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) { + return false; + } + return x instanceof TransformStream; +} +// This is a no-op if both sides are already errored. +function TransformStreamError(stream, e) { + ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e); + TransformStreamErrorWritableAndUnblockWrite(stream, e); +} +function TransformStreamErrorWritableAndUnblockWrite(stream, e) { + TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController); + WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e); + TransformStreamUnblockWrite(stream); +} +function TransformStreamUnblockWrite(stream) { + if (stream._backpressure) { + // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure() + // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time + // _backpressure is set. + TransformStreamSetBackpressure(stream, false); + } +} +function TransformStreamSetBackpressure(stream, backpressure) { + // Passes also when called during construction. + if (stream._backpressureChangePromise !== undefined) { + stream._backpressureChangePromise_resolve(); + } + stream._backpressureChangePromise = newPromise(resolve => { + stream._backpressureChangePromise_resolve = resolve; + }); + stream._backpressure = backpressure; +} +// Class TransformStreamDefaultController +/** + * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}. + * + * @public + */ +class TransformStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full. + */ + get desiredSize() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('desiredSize'); + } + const readableController = this._controlledTransformStream._readable._readableStreamController; + return ReadableStreamDefaultControllerGetDesiredSize(readableController); + } + enqueue(chunk = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('enqueue'); + } + TransformStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors both the readable side and the writable side of the controlled transform stream, making all future + * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded. + */ + error(reason = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('error'); + } + TransformStreamDefaultControllerError(this, reason); + } + /** + * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the + * transformer only needs to consume a portion of the chunks written to the writable side. + */ + terminate() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('terminate'); + } + TransformStreamDefaultControllerTerminate(this); + } +} +Object.defineProperties(TransformStreamDefaultController.prototype, { + enqueue: { enumerable: true }, + error: { enumerable: true }, + terminate: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue'); +setFunctionName(TransformStreamDefaultController.prototype.error, 'error'); +setFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'TransformStreamDefaultController', + configurable: true + }); +} +// Transform Stream Default Controller Abstract Operations +function IsTransformStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) { + return false; + } + return x instanceof TransformStreamDefaultController; +} +function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm) { + controller._controlledTransformStream = stream; + stream._transformStreamController = controller; + controller._transformAlgorithm = transformAlgorithm; + controller._flushAlgorithm = flushAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._finishPromise = undefined; + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) { + const controller = Object.create(TransformStreamDefaultController.prototype); + let transformAlgorithm; + let flushAlgorithm; + let cancelAlgorithm; + if (transformer.transform !== undefined) { + transformAlgorithm = chunk => transformer.transform(chunk, controller); + } + else { + transformAlgorithm = chunk => { + try { + TransformStreamDefaultControllerEnqueue(controller, chunk); + return promiseResolvedWith(undefined); + } + catch (transformResultE) { + return promiseRejectedWith(transformResultE); + } + }; + } + if (transformer.flush !== undefined) { + flushAlgorithm = () => transformer.flush(controller); + } + else { + flushAlgorithm = () => promiseResolvedWith(undefined); + } + if (transformer.cancel !== undefined) { + cancelAlgorithm = reason => transformer.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm); +} +function TransformStreamDefaultControllerClearAlgorithms(controller) { + controller._transformAlgorithm = undefined; + controller._flushAlgorithm = undefined; + controller._cancelAlgorithm = undefined; +} +function TransformStreamDefaultControllerEnqueue(controller, chunk) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) { + throw new TypeError('Readable side is not in a state that permits enqueue'); + } + // We throttle transform invocations based on the backpressure of the ReadableStream, but we still + // accept TransformStreamDefaultControllerEnqueue() calls. + try { + ReadableStreamDefaultControllerEnqueue(readableController, chunk); + } + catch (e) { + // This happens when readableStrategy.size() throws. + TransformStreamErrorWritableAndUnblockWrite(stream, e); + throw stream._readable._storedError; + } + const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController); + if (backpressure !== stream._backpressure) { + TransformStreamSetBackpressure(stream, true); + } +} +function TransformStreamDefaultControllerError(controller, e) { + TransformStreamError(controller._controlledTransformStream, e); +} +function TransformStreamDefaultControllerPerformTransform(controller, chunk) { + const transformPromise = controller._transformAlgorithm(chunk); + return transformPromiseWith(transformPromise, undefined, r => { + TransformStreamError(controller._controlledTransformStream, r); + throw r; + }); +} +function TransformStreamDefaultControllerTerminate(controller) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + ReadableStreamDefaultControllerClose(readableController); + const error = new TypeError('TransformStream terminated'); + TransformStreamErrorWritableAndUnblockWrite(stream, error); +} +// TransformStreamDefaultSink Algorithms +function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) { + const controller = stream._transformStreamController; + if (stream._backpressure) { + const backpressureChangePromise = stream._backpressureChangePromise; + return transformPromiseWith(backpressureChangePromise, () => { + const writable = stream._writable; + const state = writable._state; + if (state === 'erroring') { + throw writable._storedError; + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + }); + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); +} +function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally, + // we don't run the _cancelAlgorithm again. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerError(readable._readableStreamController, reason); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +function TransformStreamDefaultSinkCloseAlgorithm(stream) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally, + // we don't also run the _cancelAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const flushPromise = controller._flushAlgorithm(); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(flushPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerClose(readable._readableStreamController); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +// TransformStreamDefaultSource Algorithms +function TransformStreamDefaultSourcePullAlgorithm(stream) { + // Invariant. Enforced by the promises returned by start() and pull(). + TransformStreamSetBackpressure(stream, false); + // Prevent the next pull() call until there is backpressure. + return stream._backpressureChangePromise; +} +function TransformStreamDefaultSourceCancelAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._writable cannot change after construction, so caching it across a call to user code is safe. + const writable = stream._writable; + // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or + // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the + // _flushAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (writable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, writable._storedError); + } + else { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +// Helper functions for the TransformStreamDefaultController. +function defaultControllerBrandCheckException(name) { + return new TypeError(`TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`); +} +function defaultControllerFinishPromiseResolve(controller) { + if (controller._finishPromise_resolve === undefined) { + return; + } + controller._finishPromise_resolve(); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +function defaultControllerFinishPromiseReject(controller, reason) { + if (controller._finishPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(controller._finishPromise); + controller._finishPromise_reject(reason); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +// Helper functions for the TransformStream. +function streamBrandCheckException(name) { + return new TypeError(`TransformStream.prototype.${name} can only be used on a TransformStream`); +} + +const exports = { + ReadableStream, + ReadableStreamDefaultController, + ReadableByteStreamController, + ReadableStreamBYOBRequest, + ReadableStreamDefaultReader, + ReadableStreamBYOBReader, + WritableStream, + WritableStreamDefaultController, + WritableStreamDefaultWriter, + ByteLengthQueuingStrategy, + CountQueuingStrategy, + TransformStream, + TransformStreamDefaultController +}; +// Add classes to global scope +if (typeof globals !== 'undefined') { + for (const prop in exports) { + if (Object.prototype.hasOwnProperty.call(exports, prop)) { + Object.defineProperty(globals, prop, { + value: exports[prop], + writable: true, + configurable: true + }); + } + } +} + +export { ByteLengthQueuingStrategy, CountQueuingStrategy, ReadableByteStreamController, ReadableStream, ReadableStreamBYOBReader, ReadableStreamBYOBRequest, ReadableStreamDefaultController, ReadableStreamDefaultReader, TransformStream, TransformStreamDefaultController, WritableStream, WritableStreamDefaultController, WritableStreamDefaultWriter }; +//# sourceMappingURL=polyfill.es6.mjs.map diff --git a/node_modules/web-streams-polyfill/dist/polyfill.es6.mjs.map b/node_modules/web-streams-polyfill/dist/polyfill.es6.mjs.map new file mode 100644 index 00000000..d37f8bc2 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/polyfill.es6.mjs.map @@ -0,0 +1 @@ +{"version":3,"file":"polyfill.es6.mjs","sources":["../src/utils.ts","../src/lib/helpers/miscellaneous.ts","../src/lib/helpers/webidl.ts","../src/lib/simple-queue.ts","../src/lib/abstract-ops/internal-methods.ts","../src/lib/readable-stream/generic-reader.ts","../src/stub/number-isfinite.ts","../src/stub/math-trunc.ts","../src/lib/validators/basic.ts","../src/lib/validators/readable-stream.ts","../src/lib/readable-stream/default-reader.ts","../node_modules/tslib/tslib.es6.js","../src/lib/abstract-ops/ecmascript.ts","../src/target/es5/stub/async-iterator-prototype.ts","../src/lib/readable-stream/async-iterator.ts","../src/stub/number-isnan.ts","../src/lib/abstract-ops/miscellaneous.ts","../src/lib/abstract-ops/queue-with-sizes.ts","../src/lib/helpers/array-buffer-view.ts","../src/lib/readable-stream/byte-stream-controller.ts","../src/lib/validators/reader-options.ts","../src/lib/readable-stream/byob-reader.ts","../src/lib/abstract-ops/queuing-strategy.ts","../src/lib/validators/queuing-strategy.ts","../src/lib/validators/underlying-sink.ts","../src/lib/validators/writable-stream.ts","../src/lib/abort-signal.ts","../src/lib/writable-stream.ts","../src/globals.ts","../src/stub/dom-exception.ts","../src/lib/readable-stream/pipe.ts","../src/lib/readable-stream/default-controller.ts","../src/lib/readable-stream/tee.ts","../src/lib/readable-stream/readable-stream-like.ts","../src/lib/readable-stream/from.ts","../src/lib/validators/underlying-source.ts","../src/lib/validators/iterator-options.ts","../src/lib/validators/pipe-options.ts","../src/lib/validators/readable-writable-pair.ts","../src/lib/readable-stream.ts","../src/lib/validators/queuing-strategy-init.ts","../src/lib/byte-length-queuing-strategy.ts","../src/lib/count-queuing-strategy.ts","../src/lib/validators/transformer.ts","../src/lib/transform-stream.ts","../src/polyfill.ts"],"sourcesContent":["export function noop(): undefined {\n return undefined;\n}\n","import { noop } from '../../utils';\nimport { AssertionError } from '../../stub/assert';\n\nexport function typeIsObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport const rethrowAssertionErrorRejection: (e: any) => void =\n DEBUG ? e => {\n // Used throughout the reference implementation, as `.catch(rethrowAssertionErrorRejection)`, to ensure any errors\n // get shown. There are places in the spec where we do promise transformations and purposefully ignore or don't\n // expect any errors, but assertion errors are always problematic.\n if (e && e instanceof AssertionError) {\n setTimeout(() => {\n throw e;\n }, 0);\n }\n } : noop;\n\nexport function setFunctionName(fn: Function, name: string): void {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n } catch {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n}\n","import { rethrowAssertionErrorRejection } from './miscellaneous';\nimport assert from '../../stub/assert';\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\n\n// https://webidl.spec.whatwg.org/#a-new-promise\nexport function newPromise(executor: (\n resolve: (value: T | PromiseLike) => void,\n reject: (reason?: any) => void\n) => void): Promise {\n return new originalPromise(executor);\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-resolved-with\nexport function promiseResolvedWith(value: T | PromiseLike): Promise {\n return newPromise(resolve => resolve(value));\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-rejected-with\nexport function promiseRejectedWith(reason: any): Promise {\n return originalPromiseReject(reason);\n}\n\nexport function PerformPromiseThen(\n promise: Promise,\n onFulfilled?: (value: T) => TResult1 | PromiseLike,\n onRejected?: (reason: any) => TResult2 | PromiseLike): Promise {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected) as Promise;\n}\n\n// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n// from that handler. To prevent this, return null instead of void from all handlers.\n// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\nexport function uponPromise(\n promise: Promise,\n onFulfilled?: (value: T) => null | PromiseLike,\n onRejected?: (reason: any) => null | PromiseLike): void {\n PerformPromiseThen(\n PerformPromiseThen(promise, onFulfilled, onRejected),\n undefined,\n rethrowAssertionErrorRejection\n );\n}\n\nexport function uponFulfillment(promise: Promise, onFulfilled: (value: T) => null | PromiseLike): void {\n uponPromise(promise, onFulfilled);\n}\n\nexport function uponRejection(promise: Promise, onRejected: (reason: any) => null | PromiseLike): void {\n uponPromise(promise, undefined, onRejected);\n}\n\nexport function transformPromiseWith(\n promise: Promise,\n fulfillmentHandler?: (value: T) => TResult1 | PromiseLike,\n rejectionHandler?: (reason: any) => TResult2 | PromiseLike): Promise {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\n\nexport function setPromiseIsHandledToTrue(promise: Promise): void {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\nlet _queueMicrotask: (callback: () => void) => void = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n } else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n};\n\nexport { _queueMicrotask as queueMicrotask };\n\nexport function reflectCall(F: (this: T, ...fnArgs: A) => R, V: T, args: A): R {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n}\n\nexport function promiseCall(F: (this: T, ...fnArgs: A) => R | PromiseLike,\n V: T,\n args: A): Promise {\n assert(typeof F === 'function');\n assert(V !== undefined);\n assert(Array.isArray(args));\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n } catch (value) {\n return promiseRejectedWith(value);\n }\n}\n","import assert from '../stub/assert';\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n\ninterface Node {\n _elements: T[];\n _next: Node | undefined;\n}\n\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nexport class SimpleQueue {\n private _front: Node;\n private _back: Node;\n private _cursor = 0;\n private _size = 0;\n\n constructor() {\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n\n get length(): number {\n return this._size;\n }\n\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element: T): void {\n const oldBack = this._back;\n let newBack = oldBack;\n assert(oldBack._next === undefined);\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n assert(elements.length === QUEUE_MAX_ARRAY_SIZE);\n assert(oldFront._next !== undefined);\n newFront = oldFront._next!;\n newCursor = 0;\n }\n\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined!;\n\n return element;\n }\n\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback: (element: T) => void): void {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n assert(node._next !== undefined);\n assert(i === QUEUE_MAX_ARRAY_SIZE);\n node = node._next!;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n}\n","export const AbortSteps = Symbol('[[AbortSteps]]');\nexport const ErrorSteps = Symbol('[[ErrorSteps]]');\nexport const CancelSteps = Symbol('[[CancelSteps]]');\nexport const PullSteps = Symbol('[[PullSteps]]');\nexport const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n","import assert from '../../stub/assert';\nimport { ReadableStream, ReadableStreamCancel, type ReadableStreamReader } from '../readable-stream';\nimport { newPromise, setPromiseIsHandledToTrue } from '../helpers/webidl';\nimport { ReleaseSteps } from '../abstract-ops/internal-methods';\n\nexport function ReadableStreamReaderGenericInitialize(reader: ReadableStreamReader, stream: ReadableStream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n } else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n } else {\n assert(stream._state === 'errored');\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n}\n\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\n\nexport function ReadableStreamReaderGenericCancel(reader: ReadableStreamReader, reason: any): Promise {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n return ReadableStreamCancel(stream, reason);\n}\n\nexport function ReadableStreamReaderGenericRelease(reader: ReadableStreamReader) {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n assert(stream._reader === reader);\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n } else {\n defaultReaderClosedPromiseResetToRejected(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n\n stream._readableStreamController[ReleaseSteps]();\n\n stream._reader = undefined;\n reader._ownerReadableStream = undefined!;\n}\n\n// Helper functions for the readers.\n\nexport function readerLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nexport function defaultReaderClosedPromiseInitialize(reader: ReadableStreamReader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n}\n\nexport function defaultReaderClosedPromiseInitializeAsRejected(reader: ReadableStreamReader, reason: any) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseInitializeAsResolved(reader: ReadableStreamReader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n}\n\nexport function defaultReaderClosedPromiseReject(reader: ReadableStreamReader, reason: any) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n\nexport function defaultReaderClosedPromiseResetToRejected(reader: ReadableStreamReader, reason: any) {\n assert(reader._closedPromise_resolve === undefined);\n assert(reader._closedPromise_reject === undefined);\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseResolve(reader: ReadableStreamReader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite: typeof Number.isFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n};\n\nexport default NumberIsFinite;\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc: typeof Math.trunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\nexport default MathTrunc;\n","import NumberIsFinite from '../../stub/number-isfinite';\nimport MathTrunc from '../../stub/math-trunc';\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nexport function isDictionary(x: any): x is object | null {\n return typeof x === 'object' || typeof x === 'function';\n}\n\nexport function assertDictionary(obj: unknown,\n context: string): asserts obj is object | null | undefined {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport type AnyFunction = (...args: any[]) => any;\n\n// https://heycam.github.io/webidl/#idl-callback-functions\nexport function assertFunction(x: unknown, context: string): asserts x is AnyFunction {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-object\nexport function isObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport function assertObject(x: unknown,\n context: string): asserts x is object {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport function assertRequiredArgument(x: T | undefined,\n position: number,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n}\n\nexport function assertRequiredField(x: T | undefined,\n field: string,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nexport function convertUnrestrictedDouble(value: unknown): number {\n return Number(value);\n}\n\nfunction censorNegativeZero(x: number): number {\n return x === 0 ? 0 : x;\n}\n\nfunction integerPart(x: number): number {\n return censorNegativeZero(MathTrunc(x));\n}\n\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nexport function convertUnsignedLongLongWithEnforceRange(value: unknown, context: string): number {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n\n let x = Number(value);\n x = censorNegativeZero(x);\n\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n\n x = integerPart(x);\n\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n\n return x;\n}\n","import { IsReadableStream, ReadableStream } from '../readable-stream';\n\nexport function assertReadableStream(x: unknown, context: string): asserts x is ReadableStream {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, ReadableStream } from '../readable-stream';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { PullSteps } from '../abstract-ops/internal-methods';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\n\n/**\n * A result returned by {@link ReadableStreamDefaultReader.read}.\n *\n * @public\n */\nexport type ReadableStreamDefaultReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value?: undefined;\n}\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamDefaultReader(stream: ReadableStream): ReadableStreamDefaultReader {\n return new ReadableStreamDefaultReader(stream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadRequest(stream: ReadableStream,\n readRequest: ReadRequest): void {\n assert(IsReadableStreamDefaultReader(stream._reader));\n assert(stream._state === 'readable');\n\n (stream._reader! as ReadableStreamDefaultReader)._readRequests.push(readRequest);\n}\n\nexport function ReadableStreamFulfillReadRequest(stream: ReadableStream, chunk: R | undefined, done: boolean) {\n const reader = stream._reader as ReadableStreamDefaultReader;\n\n assert(reader._readRequests.length > 0);\n\n const readRequest = reader._readRequests.shift()!;\n if (done) {\n readRequest._closeSteps();\n } else {\n readRequest._chunkSteps(chunk!);\n }\n}\n\nexport function ReadableStreamGetNumReadRequests(stream: ReadableStream): number {\n return (stream._reader as ReadableStreamDefaultReader)._readRequests.length;\n}\n\nexport function ReadableStreamHasDefaultReader(stream: ReadableStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadRequest {\n _chunkSteps(chunk: R): void;\n\n _closeSteps(): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamDefaultReader {\n /** @internal */\n _ownerReadableStream!: ReadableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(): Promise> {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamDefaultReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamDefaultReader(x: any): x is ReadableStreamDefaultReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultReader;\n}\n\nexport function ReadableStreamDefaultReaderRead(reader: ReadableStreamDefaultReader,\n readRequest: ReadRequest): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n } else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n } else {\n assert(stream._state === 'readable');\n stream._readableStreamController[PullSteps](readRequest as ReadRequest);\n }\n}\n\nexport function ReadableStreamDefaultReaderRelease(reader: ReadableStreamDefaultReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n}\n\nexport function ReadableStreamDefaultReaderErrorReadRequests(reader: ReadableStreamDefaultReader, e: any) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nfunction defaultReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n","/******************************************************************************\r\nCopyright (c) Microsoft Corporation.\r\n\r\nPermission to use, copy, modify, and/or distribute this software for any\r\npurpose with or without fee is hereby granted.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\r\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY\r\nAND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\r\n***************************************************************************** */\r\n/* global Reflect, Promise, SuppressedError, Symbol */\r\n\r\nvar extendStatics = function(d, b) {\r\n extendStatics = Object.setPrototypeOf ||\r\n ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\r\n return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n if (typeof b !== \"function\" && b !== null)\r\n throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\r\n extendStatics(d, b);\r\n function __() { this.constructor = d; }\r\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\nexport var __assign = function() {\r\n __assign = Object.assign || function __assign(t) {\r\n for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n s = arguments[i];\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n }\r\n return t;\r\n }\r\n return __assign.apply(this, arguments);\r\n}\r\n\r\nexport function __rest(s, e) {\r\n var t = {};\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\r\n t[p] = s[p];\r\n if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\r\n for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {\r\n if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))\r\n t[p[i]] = s[p[i]];\r\n }\r\n return t;\r\n}\r\n\r\nexport function __decorate(decorators, target, key, desc) {\r\n var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\r\n if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\r\n else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\r\n return c > 3 && r && Object.defineProperty(target, key, r), r;\r\n}\r\n\r\nexport function __param(paramIndex, decorator) {\r\n return function (target, key) { decorator(target, key, paramIndex); }\r\n}\r\n\r\nexport function __esDecorate(ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {\r\n function accept(f) { if (f !== void 0 && typeof f !== \"function\") throw new TypeError(\"Function expected\"); return f; }\r\n var kind = contextIn.kind, key = kind === \"getter\" ? \"get\" : kind === \"setter\" ? \"set\" : \"value\";\r\n var target = !descriptorIn && ctor ? contextIn[\"static\"] ? ctor : ctor.prototype : null;\r\n var descriptor = descriptorIn || (target ? Object.getOwnPropertyDescriptor(target, contextIn.name) : {});\r\n var _, done = false;\r\n for (var i = decorators.length - 1; i >= 0; i--) {\r\n var context = {};\r\n for (var p in contextIn) context[p] = p === \"access\" ? {} : contextIn[p];\r\n for (var p in contextIn.access) context.access[p] = contextIn.access[p];\r\n context.addInitializer = function (f) { if (done) throw new TypeError(\"Cannot add initializers after decoration has completed\"); extraInitializers.push(accept(f || null)); };\r\n var result = (0, decorators[i])(kind === \"accessor\" ? { get: descriptor.get, set: descriptor.set } : descriptor[key], context);\r\n if (kind === \"accessor\") {\r\n if (result === void 0) continue;\r\n if (result === null || typeof result !== \"object\") throw new TypeError(\"Object expected\");\r\n if (_ = accept(result.get)) descriptor.get = _;\r\n if (_ = accept(result.set)) descriptor.set = _;\r\n if (_ = accept(result.init)) initializers.unshift(_);\r\n }\r\n else if (_ = accept(result)) {\r\n if (kind === \"field\") initializers.unshift(_);\r\n else descriptor[key] = _;\r\n }\r\n }\r\n if (target) Object.defineProperty(target, contextIn.name, descriptor);\r\n done = true;\r\n};\r\n\r\nexport function __runInitializers(thisArg, initializers, value) {\r\n var useValue = arguments.length > 2;\r\n for (var i = 0; i < initializers.length; i++) {\r\n value = useValue ? initializers[i].call(thisArg, value) : initializers[i].call(thisArg);\r\n }\r\n return useValue ? value : void 0;\r\n};\r\n\r\nexport function __propKey(x) {\r\n return typeof x === \"symbol\" ? x : \"\".concat(x);\r\n};\r\n\r\nexport function __setFunctionName(f, name, prefix) {\r\n if (typeof name === \"symbol\") name = name.description ? \"[\".concat(name.description, \"]\") : \"\";\r\n return Object.defineProperty(f, \"name\", { configurable: true, value: prefix ? \"\".concat(prefix, \" \", name) : name });\r\n};\r\n\r\nexport function __metadata(metadataKey, metadataValue) {\r\n if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(metadataKey, metadataValue);\r\n}\r\n\r\nexport function __awaiter(thisArg, _arguments, P, generator) {\r\n function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }\r\n return new (P || (P = Promise))(function (resolve, reject) {\r\n function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\r\n function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\r\n function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }\r\n step((generator = generator.apply(thisArg, _arguments || [])).next());\r\n });\r\n}\r\n\r\nexport function __generator(thisArg, body) {\r\n var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n function verb(n) { return function (v) { return step([n, v]); }; }\r\n function step(op) {\r\n if (f) throw new TypeError(\"Generator is already executing.\");\r\n while (g && (g = 0, op[0] && (_ = 0)), _) try {\r\n if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\r\n if (y = 0, t) op = [op[0] & 2, t.value];\r\n switch (op[0]) {\r\n case 0: case 1: t = op; break;\r\n case 4: _.label++; return { value: op[1], done: false };\r\n case 5: _.label++; y = op[1]; op = [0]; continue;\r\n case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n default:\r\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n if (t[2]) _.ops.pop();\r\n _.trys.pop(); continue;\r\n }\r\n op = body.call(thisArg, _);\r\n } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n }\r\n}\r\n\r\nexport var __createBinding = Object.create ? (function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n var desc = Object.getOwnPropertyDescriptor(m, k);\r\n if (!desc || (\"get\" in desc ? !m.__esModule : desc.writable || desc.configurable)) {\r\n desc = { enumerable: true, get: function() { return m[k]; } };\r\n }\r\n Object.defineProperty(o, k2, desc);\r\n}) : (function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n o[k2] = m[k];\r\n});\r\n\r\nexport function __exportStar(m, o) {\r\n for (var p in m) if (p !== \"default\" && !Object.prototype.hasOwnProperty.call(o, p)) __createBinding(o, m, p);\r\n}\r\n\r\nexport function __values(o) {\r\n var s = typeof Symbol === \"function\" && Symbol.iterator, m = s && o[s], i = 0;\r\n if (m) return m.call(o);\r\n if (o && typeof o.length === \"number\") return {\r\n next: function () {\r\n if (o && i >= o.length) o = void 0;\r\n return { value: o && o[i++], done: !o };\r\n }\r\n };\r\n throw new TypeError(s ? \"Object is not iterable.\" : \"Symbol.iterator is not defined.\");\r\n}\r\n\r\nexport function __read(o, n) {\r\n var m = typeof Symbol === \"function\" && o[Symbol.iterator];\r\n if (!m) return o;\r\n var i = m.call(o), r, ar = [], e;\r\n try {\r\n while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\r\n }\r\n catch (error) { e = { error: error }; }\r\n finally {\r\n try {\r\n if (r && !r.done && (m = i[\"return\"])) m.call(i);\r\n }\r\n finally { if (e) throw e.error; }\r\n }\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spread() {\r\n for (var ar = [], i = 0; i < arguments.length; i++)\r\n ar = ar.concat(__read(arguments[i]));\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spreadArrays() {\r\n for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;\r\n for (var r = Array(s), k = 0, i = 0; i < il; i++)\r\n for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)\r\n r[k] = a[j];\r\n return r;\r\n}\r\n\r\nexport function __spreadArray(to, from, pack) {\r\n if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {\r\n if (ar || !(i in from)) {\r\n if (!ar) ar = Array.prototype.slice.call(from, 0, i);\r\n ar[i] = from[i];\r\n }\r\n }\r\n return to.concat(ar || Array.prototype.slice.call(from));\r\n}\r\n\r\nexport function __await(v) {\r\n return this instanceof __await ? (this.v = v, this) : new __await(v);\r\n}\r\n\r\nexport function __asyncGenerator(thisArg, _arguments, generator) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var g = generator.apply(thisArg, _arguments || []), i, q = [];\r\n return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\r\n function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\r\n function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\r\n function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n function fulfill(value) { resume(\"next\", value); }\r\n function reject(value) { resume(\"throw\", value); }\r\n function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n var i, p;\r\n return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var m = o[Symbol.asyncIterator], i;\r\n return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n return cooked;\r\n};\r\n\r\nvar __setModuleDefault = Object.create ? (function(o, v) {\r\n Object.defineProperty(o, \"default\", { enumerable: true, value: v });\r\n}) : function(o, v) {\r\n o[\"default\"] = v;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n if (mod && mod.__esModule) return mod;\r\n var result = {};\r\n if (mod != null) for (var k in mod) if (k !== \"default\" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);\r\n __setModuleDefault(result, mod);\r\n return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n\r\nexport function __classPrivateFieldGet(receiver, state, kind, f) {\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a getter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot read private member from an object whose class did not declare it\");\r\n return kind === \"m\" ? f : kind === \"a\" ? f.call(receiver) : f ? f.value : state.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, state, value, kind, f) {\r\n if (kind === \"m\") throw new TypeError(\"Private method is not writable\");\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a setter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot write private member to an object whose class did not declare it\");\r\n return (kind === \"a\" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;\r\n}\r\n\r\nexport function __classPrivateFieldIn(state, receiver) {\r\n if (receiver === null || (typeof receiver !== \"object\" && typeof receiver !== \"function\")) throw new TypeError(\"Cannot use 'in' operator on non-object\");\r\n return typeof state === \"function\" ? receiver === state : state.has(receiver);\r\n}\r\n\r\nexport function __addDisposableResource(env, value, async) {\r\n if (value !== null && value !== void 0) {\r\n if (typeof value !== \"object\" && typeof value !== \"function\") throw new TypeError(\"Object expected.\");\r\n var dispose;\r\n if (async) {\r\n if (!Symbol.asyncDispose) throw new TypeError(\"Symbol.asyncDispose is not defined.\");\r\n dispose = value[Symbol.asyncDispose];\r\n }\r\n if (dispose === void 0) {\r\n if (!Symbol.dispose) throw new TypeError(\"Symbol.dispose is not defined.\");\r\n dispose = value[Symbol.dispose];\r\n }\r\n if (typeof dispose !== \"function\") throw new TypeError(\"Object not disposable.\");\r\n env.stack.push({ value: value, dispose: dispose, async: async });\r\n }\r\n else if (async) {\r\n env.stack.push({ async: true });\r\n }\r\n return value;\r\n}\r\n\r\nvar _SuppressedError = typeof SuppressedError === \"function\" ? SuppressedError : function (error, suppressed, message) {\r\n var e = new Error(message);\r\n return e.name = \"SuppressedError\", e.error = error, e.suppressed = suppressed, e;\r\n};\r\n\r\nexport function __disposeResources(env) {\r\n function fail(e) {\r\n env.error = env.hasError ? new _SuppressedError(e, env.error, \"An error was suppressed during disposal.\") : e;\r\n env.hasError = true;\r\n }\r\n function next() {\r\n while (env.stack.length) {\r\n var rec = env.stack.pop();\r\n try {\r\n var result = rec.dispose && rec.dispose.call(rec.value);\r\n if (rec.async) return Promise.resolve(result).then(next, function(e) { fail(e); return next(); });\r\n }\r\n catch (e) {\r\n fail(e);\r\n }\r\n }\r\n if (env.hasError) throw env.error;\r\n }\r\n return next();\r\n}\r\n\r\nexport default {\r\n __extends: __extends,\r\n __assign: __assign,\r\n __rest: __rest,\r\n __decorate: __decorate,\r\n __param: __param,\r\n __metadata: __metadata,\r\n __awaiter: __awaiter,\r\n __generator: __generator,\r\n __createBinding: __createBinding,\r\n __exportStar: __exportStar,\r\n __values: __values,\r\n __read: __read,\r\n __spread: __spread,\r\n __spreadArrays: __spreadArrays,\r\n __spreadArray: __spreadArray,\r\n __await: __await,\r\n __asyncGenerator: __asyncGenerator,\r\n __asyncDelegator: __asyncDelegator,\r\n __asyncValues: __asyncValues,\r\n __makeTemplateObject: __makeTemplateObject,\r\n __importStar: __importStar,\r\n __importDefault: __importDefault,\r\n __classPrivateFieldGet: __classPrivateFieldGet,\r\n __classPrivateFieldSet: __classPrivateFieldSet,\r\n __classPrivateFieldIn: __classPrivateFieldIn,\r\n __addDisposableResource: __addDisposableResource,\r\n __disposeResources: __disposeResources,\r\n};\r\n","import { reflectCall } from 'lib/helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport assert from '../../stub/assert';\n\ndeclare global {\n interface ArrayBuffer {\n readonly detached: boolean;\n\n transfer(): ArrayBuffer;\n }\n\n function structuredClone(value: T, options: { transfer: ArrayBuffer[] }): T;\n}\n\nexport function CreateArrayFromList(elements: T): T {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice() as T;\n}\n\nexport function CopyDataBlockBytes(dest: ArrayBuffer,\n destOffset: number,\n src: ArrayBuffer,\n srcOffset: number,\n n: number) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n\nexport let TransferArrayBuffer = (O: ArrayBuffer): ArrayBuffer => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n } else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n } else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n};\n\nexport function CanTransferArrayBuffer(O: ArrayBuffer): boolean {\n return !IsDetachedBuffer(O);\n}\n\nexport let IsDetachedBuffer = (O: ArrayBuffer): boolean => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n } else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n};\n\nexport function ArrayBufferSlice(buffer: ArrayBuffer, begin: number, end: number): ArrayBuffer {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n}\n\nexport type MethodName = {\n [P in keyof T]: T[P] extends Function | undefined ? P : never;\n}[keyof T];\n\nexport function GetMethod>(receiver: T, prop: K): T[K] | undefined {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n}\n\nexport interface SyncIteratorRecord {\n iterator: Iterator,\n nextMethod: Iterator['next'],\n done: boolean;\n}\n\nexport interface AsyncIteratorRecord {\n iterator: AsyncIterator,\n nextMethod: AsyncIterator['next'],\n done: boolean;\n}\n\nexport type SyncOrAsyncIteratorRecord = SyncIteratorRecord | AsyncIteratorRecord;\n\nexport function CreateAsyncFromSyncIterator(syncIteratorRecord: SyncIteratorRecord): AsyncIteratorRecord {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n}\n\n// Aligns with core-js/modules/es.symbol.async-iterator.js\nexport const SymbolAsyncIterator: (typeof Symbol)['asyncIterator'] =\n Symbol.asyncIterator ??\n Symbol.for?.('Symbol.asyncIterator') ??\n '@@asyncIterator';\n\nexport type SyncOrAsyncIterable = Iterable | AsyncIterable;\nexport type SyncOrAsyncIteratorMethod = () => (Iterator | AsyncIterator);\n\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint: 'async',\n method?: SyncOrAsyncIteratorMethod\n): AsyncIteratorRecord;\nfunction GetIterator(\n obj: Iterable,\n hint: 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncIteratorRecord;\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint = 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncOrAsyncIteratorRecord {\n assert(hint === 'sync' || hint === 'async');\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj as AsyncIterable, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj as Iterable, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj as Iterable, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n } else {\n method = GetMethod(obj as Iterable, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false } as SyncOrAsyncIteratorRecord;\n}\n\nexport { GetIterator };\n\nexport function IteratorNext(iteratorRecord: AsyncIteratorRecord): Promise> {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n}\n\nexport function IteratorComplete(\n iterResult: IteratorResult\n): iterResult is IteratorReturnResult {\n assert(typeIsObject(iterResult));\n return Boolean(iterResult.done);\n}\n\nexport function IteratorValue(iterResult: IteratorYieldResult): T {\n assert(typeIsObject(iterResult));\n return iterResult.value;\n}\n","/// \n\nimport { SymbolAsyncIterator } from '../../../lib/abstract-ops/ecmascript';\n\n// We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it.\nexport const AsyncIteratorPrototype: AsyncIterable = {\n // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( )\n // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator\n [SymbolAsyncIterator](this: AsyncIterator) {\n return this;\n }\n};\nObject.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false });\n","/// \n\nimport { ReadableStream } from '../readable-stream';\nimport {\n AcquireReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadableStreamDefaultReadResult,\n type ReadRequest\n} from './default-reader';\nimport { ReadableStreamReaderGenericCancel, ReadableStreamReaderGenericRelease } from './generic-reader';\nimport assert from '../../stub/assert';\nimport { AsyncIteratorPrototype } from '@@target/stub/async-iterator-prototype';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n queueMicrotask,\n transformPromiseWith\n} from '../helpers/webidl';\n\n/**\n * An async iterator returned by {@link ReadableStream.values}.\n *\n * @public\n */\nexport interface ReadableStreamAsyncIterator extends AsyncIterableIterator {\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nexport class ReadableStreamAsyncIteratorImpl {\n private readonly _reader: ReadableStreamDefaultReader;\n private readonly _preventCancel: boolean;\n private _ongoingPromise: Promise> | undefined = undefined;\n private _isFinished = false;\n\n constructor(reader: ReadableStreamDefaultReader, preventCancel: boolean) {\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n\n next(): Promise> {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n\n return(value: any): Promise> {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n\n private _nextSteps(): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n\n private _returnSteps(value: any): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n assert(reader._readRequests.length === 0);\n\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n}\n\ninterface ReadableStreamAsyncIteratorInstance extends ReadableStreamAsyncIterator {\n /** @interal */\n _asyncIteratorImpl: ReadableStreamAsyncIteratorImpl;\n\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nconst ReadableStreamAsyncIteratorPrototype: ReadableStreamAsyncIteratorInstance = {\n next(this: ReadableStreamAsyncIteratorInstance): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n\n return(this: ReadableStreamAsyncIteratorInstance, value: any): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n} as any;\nObject.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamAsyncIterator(stream: ReadableStream,\n preventCancel: boolean): ReadableStreamAsyncIterator {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator: ReadableStreamAsyncIteratorInstance = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n}\n\nfunction IsReadableStreamAsyncIterator(x: any): x is ReadableStreamAsyncIterator {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n\n try {\n // noinspection SuspiciousTypeOfGuard\n return (x as ReadableStreamAsyncIteratorInstance)._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n } catch {\n return false;\n }\n}\n\n// Helper functions for the ReadableStream.\n\nfunction streamAsyncIteratorBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN: typeof Number.isNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n};\n\nexport default NumberIsNaN;\n","import NumberIsNaN from '../../stub/number-isnan';\nimport { ArrayBufferSlice } from './ecmascript';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function IsNonNegativeNumber(v: number): boolean {\n if (typeof v !== 'number') {\n return false;\n }\n\n if (NumberIsNaN(v)) {\n return false;\n }\n\n if (v < 0) {\n return false;\n }\n\n return true;\n}\n\nexport function CloneAsUint8Array(O: NonShared): NonShared {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer) as NonShared;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsNonNegativeNumber } from './miscellaneous';\n\nexport interface QueueContainer {\n _queue: SimpleQueue;\n _queueTotalSize: number;\n}\n\nexport interface QueuePair {\n value: T;\n size: number;\n}\n\nexport function DequeueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.shift()!;\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n\n return pair.value;\n}\n\nexport function EnqueueValueWithSize(container: QueueContainer>, value: T, size: number) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n}\n\nexport function PeekQueueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.peek();\n return pair.value;\n}\n\nexport function ResetQueue(container: QueueContainer) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n}\n","export type TypedArray =\n | Int8Array\n | Uint8Array\n | Uint8ClampedArray\n | Int16Array\n | Uint16Array\n | Int32Array\n | Uint32Array\n | Float32Array\n | Float64Array;\n\nexport type NonShared = T & {\n buffer: ArrayBuffer;\n}\n\nexport interface ArrayBufferViewConstructor {\n new(buffer: ArrayBuffer, byteOffset: number, length?: number): T;\n\n readonly prototype: T;\n}\n\nexport interface TypedArrayConstructor extends ArrayBufferViewConstructor {\n readonly BYTES_PER_ELEMENT: number;\n}\n\nexport type DataViewConstructor = ArrayBufferViewConstructor;\n\nfunction isDataViewConstructor(ctor: Function): ctor is DataViewConstructor {\n return ctor === DataView;\n}\n\nexport function isDataView(view: ArrayBufferView): view is DataView {\n return isDataViewConstructor(view.constructor);\n}\n\nexport function arrayBufferViewElementSize(ctor: ArrayBufferViewConstructor): number {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return (ctor as unknown as TypedArrayConstructor).BYTES_PER_ELEMENT;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n IsReadableStreamDefaultReader,\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n ReadableStreamHasDefaultReader,\n type ReadRequest\n} from './default-reader';\nimport {\n ReadableStreamAddReadIntoRequest,\n ReadableStreamFulfillReadIntoRequest,\n ReadableStreamGetNumReadIntoRequests,\n ReadableStreamHasBYOBReader,\n type ReadIntoRequest\n} from './byob-reader';\nimport NumberIsInteger from '../../stub/number-isinteger';\nimport {\n IsReadableStreamLocked,\n type ReadableByteStream,\n ReadableStreamClose,\n ReadableStreamError\n} from '../readable-stream';\nimport type { ValidatedUnderlyingByteSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport {\n ArrayBufferSlice,\n CanTransferArrayBuffer,\n CopyDataBlockBytes,\n IsDetachedBuffer,\n TransferArrayBuffer\n} from '../abstract-ops/ecmascript';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\nimport { assertRequiredArgument, convertUnsignedLongLongWithEnforceRange } from '../validators/basic';\nimport {\n type ArrayBufferViewConstructor,\n arrayBufferViewElementSize,\n type NonShared,\n type TypedArrayConstructor\n} from '../helpers/array-buffer-view';\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nexport class ReadableStreamBYOBRequest {\n /** @internal */\n _associatedReadableByteStreamController!: ReadableByteStreamController;\n /** @internal */\n _view!: NonShared | null;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view(): ArrayBufferView | null {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n\n return this._view;\n }\n\n /**\n * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into\n * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer.\n *\n * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer\n * modifiable.\n */\n respond(bytesWritten: number): void;\n respond(bytesWritten: number | undefined): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(this._view!.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n\n assert(this._view!.byteLength > 0);\n assert(this._view!.buffer.byteLength > 0);\n\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n\n /**\n * Indicates to the associated readable byte stream that instead of writing into\n * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`,\n * which will be given to the consumer of the readable byte stream.\n *\n * After this method is called, `view` will be transferred and no longer modifiable.\n */\n respondWithNewView(view: ArrayBufferView): void;\n respondWithNewView(view: NonShared): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n}\n\ninterface ByteQueueElement {\n buffer: ArrayBuffer;\n byteOffset: number;\n byteLength: number;\n}\n\ntype PullIntoDescriptor = NonShared> =\n DefaultPullIntoDescriptor\n | BYOBPullIntoDescriptor;\n\ninterface DefaultPullIntoDescriptor {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: TypedArrayConstructor;\n readerType: 'default' | 'none';\n}\n\ninterface BYOBPullIntoDescriptor = NonShared> {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: ArrayBufferViewConstructor;\n readerType: 'byob' | 'none';\n}\n\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableByteStreamController {\n /** @internal */\n _controlledReadableByteStream!: ReadableByteStream;\n /** @internal */\n _queue!: SimpleQueue;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n /** @internal */\n _autoAllocateChunkSize: number | undefined;\n /** @internal */\n _byobRequest: ReadableStreamBYOBRequest | null;\n /** @internal */\n _pendingPullIntos!: SimpleQueue;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest(): ReadableStreamBYOBRequest | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n\n ReadableByteStreamControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk chunk in the controlled readable stream.\n * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown.\n */\n enqueue(chunk: ArrayBufferView): void;\n enqueue(chunk: NonShared): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n\n ReadableByteStreamControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n\n ResetQueue(this);\n\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest>): void {\n const stream = this._controlledReadableByteStream;\n assert(ReadableStreamHasDefaultReader(stream));\n\n if (this._queueTotalSize > 0) {\n assert(ReadableStreamGetNumReadRequests(stream) === 0);\n\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer: ArrayBuffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n } catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n\n const pullIntoDescriptor: DefaultPullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n}\n\nObject.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableByteStreamController.prototype.close, 'close');\nsetFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableByteStreamController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableByteStreamController.\n\nexport function IsReadableByteStreamController(x: any): x is ReadableByteStreamController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n\n return x instanceof ReadableByteStreamController;\n}\n\nfunction IsReadableStreamBYOBRequest(x: any): x is ReadableStreamBYOBRequest {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBRequest;\n}\n\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller: ReadableByteStreamController): void {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller: ReadableByteStreamController) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n}\n\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor>(\n stream: ReadableByteStream,\n pullIntoDescriptor: PullIntoDescriptor\n) {\n assert(stream._state !== 'errored');\n assert(pullIntoDescriptor.readerType !== 'none');\n\n let done = false;\n if (stream._state === 'closed') {\n assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);\n done = true;\n }\n\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView as unknown as NonShared, done);\n } else {\n assert(pullIntoDescriptor.readerType === 'byob');\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n}\n\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor>(\n pullIntoDescriptor: PullIntoDescriptor\n): T {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n\n assert(bytesFilled <= pullIntoDescriptor.byteLength);\n assert(bytesFilled % elementSize === 0);\n\n return new pullIntoDescriptor.viewConstructor(\n pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize) as T;\n}\n\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n}\n\nfunction ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n } catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n}\n\nfunction ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.readerType === 'none');\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n firstDescriptor.buffer,\n firstDescriptor.byteOffset,\n firstDescriptor.bytesFilled\n );\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n}\n\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller: ReadableByteStreamController,\n pullIntoDescriptor: PullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize,\n pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n\n const queue = controller._queue;\n\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n } else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n\n if (!ready) {\n assert(controller._queueTotalSize === 0);\n assert(pullIntoDescriptor.bytesFilled > 0);\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n }\n\n return ready;\n}\n\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller: ReadableByteStreamController,\n size: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);\n assert(controller._byobRequest === null);\n pullIntoDescriptor.bytesFilled += size;\n}\n\nfunction ReadableByteStreamControllerHandleQueueDrain(controller: ReadableByteStreamController) {\n assert(controller._controlledReadableByteStream._state === 'readable');\n\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n } else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n}\n\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller: ReadableByteStreamController) {\n if (controller._byobRequest === null) {\n return;\n }\n\n controller._byobRequest._associatedReadableByteStreamController = undefined!;\n controller._byobRequest._view = null!;\n controller._byobRequest = null;\n}\n\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller: ReadableByteStreamController) {\n assert(!controller._closeRequested);\n\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n assert(pullIntoDescriptor.readerType !== 'none');\n\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n ReadableByteStreamControllerCommitPullIntoDescriptor(\n controller._controlledReadableByteStream,\n pullIntoDescriptor\n );\n }\n }\n}\n\nfunction ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller: ReadableByteStreamController) {\n const reader = controller._controlledReadableByteStream._reader;\n assert(IsReadableStreamDefaultReader(reader));\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n}\n\nexport function ReadableByteStreamControllerPullInto>(\n controller: ReadableByteStreamController,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = controller._controlledReadableByteStream;\n\n const ctor = view.constructor as ArrayBufferViewConstructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n\n const { byteOffset, byteLength } = view;\n\n const minimumFill = min * elementSize;\n assert(minimumFill >= elementSize && minimumFill <= byteLength);\n assert(minimumFill % elementSize === 0);\n\n let buffer: ArrayBuffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n } catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n\n const pullIntoDescriptor: BYOBPullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInClosedState(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.bytesFilled % firstDescriptor.elementSize === 0);\n\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n}\n\nfunction ReadableByteStreamControllerRespondInReadableState(controller: ReadableByteStreamController,\n bytesWritten: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n pullIntoDescriptor.buffer,\n end - remainderSize,\n remainderSize\n );\n }\n\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInternal(controller: ReadableByteStreamController, bytesWritten: number) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n assert(CanTransferArrayBuffer(firstDescriptor.buffer));\n\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n assert(bytesWritten === 0);\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n } else {\n assert(state === 'readable');\n assert(bytesWritten > 0);\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerShiftPendingPullInto(\n controller: ReadableByteStreamController\n): PullIntoDescriptor {\n assert(controller._byobRequest === null);\n const descriptor = controller._pendingPullIntos.shift()!;\n return descriptor;\n}\n\nfunction ReadableByteStreamControllerShouldCallPull(controller: ReadableByteStreamController): boolean {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return false;\n }\n\n if (controller._closeRequested) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableByteStreamControllerClearAlgorithms(controller: ReadableByteStreamController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\n\nexport function ReadableByteStreamControllerClose(controller: ReadableByteStreamController) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n\n return;\n }\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n throw e;\n }\n }\n\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n}\n\nexport function ReadableByteStreamControllerEnqueue(\n controller: ReadableByteStreamController,\n chunk: NonShared\n) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError(\n 'The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk'\n );\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n assert(controller._pendingPullIntos.length === 0);\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n } else {\n assert(controller._queue.length === 0);\n if (controller._pendingPullIntos.length > 0) {\n assert(controller._pendingPullIntos.peek().readerType === 'default');\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView as NonShared, false);\n }\n } else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n } else {\n assert(!IsReadableStreamLocked(stream));\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableByteStreamControllerError(controller: ReadableByteStreamController, e: any) {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableByteStreamControllerFillReadRequestFromQueue(\n controller: ReadableByteStreamController,\n readRequest: ReadRequest>\n) {\n assert(controller._queueTotalSize > 0);\n\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view as NonShared);\n}\n\nexport function ReadableByteStreamControllerGetBYOBRequest(\n controller: ReadableByteStreamController\n): ReadableStreamBYOBRequest | null {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer,\n firstDescriptor.byteOffset + firstDescriptor.bytesFilled,\n firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n\n const byobRequest: ReadableStreamBYOBRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view as NonShared);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n}\n\nfunction ReadableByteStreamControllerGetDesiredSize(controller: ReadableByteStreamController): number | null {\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nexport function ReadableByteStreamControllerRespond(controller: ReadableByteStreamController, bytesWritten: number) {\n assert(controller._pendingPullIntos.length > 0);\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n}\n\nexport function ReadableByteStreamControllerRespondWithNewView(controller: ReadableByteStreamController,\n view: NonShared) {\n assert(controller._pendingPullIntos.length > 0);\n assert(!IsDetachedBuffer(view.buffer));\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (view.byteLength === 0) {\n throw new TypeError(\n 'The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'\n );\n }\n }\n\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n}\n\nexport function SetUpReadableByteStreamController(stream: ReadableByteStream,\n controller: ReadableByteStreamController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n autoAllocateChunkSize: number | undefined) {\n assert(stream._readableStreamController === undefined);\n if (autoAllocateChunkSize !== undefined) {\n assert(NumberIsInteger(autoAllocateChunkSize));\n assert(autoAllocateChunkSize > 0);\n }\n\n controller._controlledReadableByteStream = stream;\n\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._byobRequest = null;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._closeRequested = false;\n controller._started = false;\n\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n\n controller._pendingPullIntos = new SimpleQueue();\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableByteStreamControllerFromUnderlyingSource(\n stream: ReadableByteStream,\n underlyingByteSource: ValidatedUnderlyingByteSource,\n highWaterMark: number\n) {\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n\n SetUpReadableByteStreamController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize\n );\n}\n\nfunction SetUpReadableStreamBYOBRequest(request: ReadableStreamBYOBRequest,\n controller: ReadableByteStreamController,\n view: NonShared) {\n assert(IsReadableByteStreamController(controller));\n assert(typeof view === 'object');\n assert(ArrayBuffer.isView(view));\n assert(!IsDetachedBuffer(view.buffer));\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n}\n\n// Helper functions for the ReadableStreamBYOBRequest.\n\nfunction byobRequestBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n}\n\n// Helper functions for the ReadableByteStreamController.\n\nfunction byteStreamControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n}\n","import { assertDictionary, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from '../readable-stream/reader-options';\n\nexport function convertReaderOptions(options: ReadableStreamGetReaderOptions | null | undefined,\n context: string): ReadableStreamGetReaderOptions {\n assertDictionary(options, context);\n const mode = options?.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n}\n\nfunction convertReadableStreamReaderMode(mode: string, context: string): 'byob' {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n}\n\nexport function convertByobReadOptions(\n options: ReadableStreamBYOBReaderReadOptions | null | undefined,\n context: string\n): ValidatedReadableStreamBYOBReaderReadOptions {\n assertDictionary(options, context);\n const min = options?.min ?? 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(\n min,\n `${context} has member 'min' that`\n )\n };\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, type ReadableByteStream, type ReadableStream } from '../readable-stream';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamController,\n ReadableByteStreamControllerPullInto\n} from './byte-stream-controller';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\nimport { IsDetachedBuffer } from '../abstract-ops/ecmascript';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from './reader-options';\nimport { convertByobReadOptions } from '../validators/reader-options';\nimport { isDataView, type NonShared, type TypedArray } from '../helpers/array-buffer-view';\n\n/**\n * A result returned by {@link ReadableStreamBYOBReader.read}.\n *\n * @public\n */\nexport type ReadableStreamBYOBReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value: T | undefined;\n};\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamBYOBReader(stream: ReadableByteStream): ReadableStreamBYOBReader {\n return new ReadableStreamBYOBReader(stream as ReadableStream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadIntoRequest>(\n stream: ReadableByteStream,\n readIntoRequest: ReadIntoRequest\n): void {\n assert(IsReadableStreamBYOBReader(stream._reader));\n assert(stream._state === 'readable' || stream._state === 'closed');\n\n (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);\n}\n\nexport function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,\n chunk: ArrayBufferView,\n done: boolean) {\n const reader = stream._reader as ReadableStreamBYOBReader;\n\n assert(reader._readIntoRequests.length > 0);\n\n const readIntoRequest = reader._readIntoRequests.shift()!;\n if (done) {\n readIntoRequest._closeSteps(chunk);\n } else {\n readIntoRequest._chunkSteps(chunk);\n }\n}\n\nexport function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {\n return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;\n}\n\nexport function ReadableStreamHasBYOBReader(stream: ReadableByteStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadIntoRequest> {\n _chunkSteps(chunk: T): void;\n\n _closeSteps(chunk: T | undefined): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamBYOBReader {\n /** @internal */\n _ownerReadableStream!: ReadableByteStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readIntoRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readIntoRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Attempts to reads bytes into view, and returns a promise resolved with the result.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(\n view: T,\n options?: ReadableStreamBYOBReaderReadOptions\n ): Promise>;\n read>(\n view: T,\n rawOptions: ReadableStreamBYOBReaderReadOptions | null | undefined = {}\n ): Promise> {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n\n let options: ValidatedReadableStreamBYOBReaderReadOptions;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > (view as unknown as TypedArray).length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n } else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamBYOBReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest: ReadIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamBYOBReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBReader;\n}\n\nexport function ReadableStreamBYOBReaderRead>(\n reader: ReadableStreamBYOBReader,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n } else {\n ReadableByteStreamControllerPullInto(\n stream._readableStreamController as ReadableByteStreamController,\n view,\n min,\n readIntoRequest\n );\n }\n}\n\nexport function ReadableStreamBYOBReaderRelease(reader: ReadableStreamBYOBReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n}\n\nexport function ReadableStreamBYOBReaderErrorReadIntoRequests(reader: ReadableStreamBYOBReader, e: any) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamBYOBReader.\n\nfunction byobReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport NumberIsNaN from '../../stub/number-isnan';\n\nexport function ExtractHighWaterMark(strategy: QueuingStrategy, defaultHWM: number): number {\n const { highWaterMark } = strategy;\n\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n\n return highWaterMark;\n}\n\nexport function ExtractSizeAlgorithm(strategy: QueuingStrategy): QueuingStrategySizeCallback {\n const { size } = strategy;\n\n if (!size) {\n return () => 1;\n }\n\n return size;\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport { assertDictionary, assertFunction, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategy(init: QueuingStrategy | null | undefined,\n context: string): QueuingStrategy {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n const size = init?.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n}\n\nfunction convertQueuingStrategySize(fn: QueuingStrategySizeCallback,\n context: string): QueuingStrategySizeCallback {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from '../writable-stream/underlying-sink';\nimport { WritableStreamDefaultController } from '../writable-stream';\n\nexport function convertUnderlyingSink(original: UnderlyingSink | null,\n context: string): ValidatedUnderlyingSink {\n assertDictionary(original, context);\n const abort = original?.abort;\n const close = original?.close;\n const start = original?.start;\n const type = original?.type;\n const write = original?.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original!, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original!, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original!, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original!, `${context} has member 'write' that`),\n type\n };\n}\n\nfunction convertUnderlyingSinkAbortCallback(\n fn: UnderlyingSinkAbortCallback,\n original: UnderlyingSink,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSinkCloseCallback(\n fn: UnderlyingSinkCloseCallback,\n original: UnderlyingSink,\n context: string\n): () => Promise {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n}\n\nfunction convertUnderlyingSinkStartCallback(\n fn: UnderlyingSinkStartCallback,\n original: UnderlyingSink,\n context: string\n): UnderlyingSinkStartCallback {\n assertFunction(fn, context);\n return (controller: WritableStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSinkWriteCallback(\n fn: UnderlyingSinkWriteCallback,\n original: UnderlyingSink,\n context: string\n): (chunk: W, controller: WritableStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: W, controller: WritableStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n","import { IsWritableStream, WritableStream } from '../writable-stream';\n\nexport function assertWritableStream(x: unknown, context: string): asserts x is WritableStream {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n}\n","/**\n * A signal object that allows you to communicate with a request and abort it if required\n * via its associated `AbortController` object.\n *\n * @remarks\n * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @public\n */\nexport interface AbortSignal {\n /**\n * Whether the request is aborted.\n */\n readonly aborted: boolean;\n\n /**\n * If aborted, returns the reason for aborting.\n */\n readonly reason?: any;\n\n /**\n * Add an event listener to be triggered when this signal becomes aborted.\n */\n addEventListener(type: 'abort', listener: () => void): void;\n\n /**\n * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}.\n */\n removeEventListener(type: 'abort', listener: () => void): void;\n}\n\nexport function isAbortSignal(value: unknown): value is AbortSignal {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof (value as AbortSignal).aborted === 'boolean';\n } catch {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n}\n\n/**\n * A controller object that allows you to abort an `AbortSignal` when desired.\n *\n * @remarks\n * This interface is compatible with the `AbortController` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @internal\n */\nexport interface AbortController {\n readonly signal: AbortSignal;\n\n abort(reason?: any): void;\n}\n\ninterface AbortControllerConstructor {\n new(): AbortController;\n}\n\nconst supportsAbortController = typeof (AbortController as any) === 'function';\n\n/**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\nexport function createAbortController(): AbortController | undefined {\n if (supportsAbortController) {\n return new (AbortController as AbortControllerConstructor)();\n }\n return undefined;\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponPromise\n} from './helpers/webidl';\nimport {\n DequeueValue,\n EnqueueValueWithSize,\n PeekQueueValue,\n type QueuePair,\n ResetQueue\n} from './abstract-ops/queue-with-sizes';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { SimpleQueue } from './simple-queue';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { AbortSteps, ErrorSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from './writable-stream/underlying-sink';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertUnderlyingSink } from './validators/underlying-sink';\nimport { assertWritableStream } from './validators/writable-stream';\nimport { type AbortController, type AbortSignal, createAbortController } from './abort-signal';\n\ntype WritableStreamState = 'writable' | 'closed' | 'erroring' | 'errored';\n\ninterface WriteOrCloseRequest {\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n}\n\ntype WriteRequest = WriteOrCloseRequest;\ntype CloseRequest = WriteOrCloseRequest;\n\ninterface PendingAbortRequest {\n _promise: Promise;\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n _reason: any;\n _wasAlreadyErroring: boolean;\n}\n\n/**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\nclass WritableStream {\n /** @internal */\n _state!: WritableStreamState;\n /** @internal */\n _storedError: any;\n /** @internal */\n _writer: WritableStreamDefaultWriter | undefined;\n /** @internal */\n _writableStreamController!: WritableStreamDefaultController;\n /** @internal */\n _writeRequests!: SimpleQueue;\n /** @internal */\n _inFlightWriteRequest: WriteRequest | undefined;\n /** @internal */\n _closeRequest: CloseRequest | undefined;\n /** @internal */\n _inFlightCloseRequest: CloseRequest | undefined;\n /** @internal */\n _pendingAbortRequest: PendingAbortRequest | undefined;\n /** @internal */\n _backpressure!: boolean;\n\n constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSink: UnderlyingSink | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n } else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n\n InitializeWritableStream(this);\n\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked(): boolean {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsWritableStreamLocked(this);\n }\n\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('abort'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n\n return WritableStreamAbort(this, reason);\n }\n\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('close'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamClose(this);\n }\n\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter(): WritableStreamDefaultWriter {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('getWriter');\n }\n\n return AcquireWritableStreamDefaultWriter(this);\n }\n}\n\nObject.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(WritableStream.prototype.abort, 'abort');\nsetFunctionName(WritableStream.prototype.close, 'close');\nsetFunctionName(WritableStream.prototype.getWriter, 'getWriter');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n}\n\nexport {\n AcquireWritableStreamDefaultWriter,\n CreateWritableStream,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamDefaultControllerErrorIfNeeded,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite,\n WritableStreamCloseQueuedOrInFlight\n};\n\nexport type {\n UnderlyingSink,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkAbortCallback\n};\n\n// Abstract operations for the WritableStream.\n\nfunction AcquireWritableStreamDefaultWriter(stream: WritableStream): WritableStreamDefaultWriter {\n return new WritableStreamDefaultWriter(stream);\n}\n\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: WritableStream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n\n const controller: WritableStreamDefaultController = Object.create(WritableStreamDefaultController.prototype);\n\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm,\n abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n}\n\nfunction InitializeWritableStream(stream: WritableStream) {\n stream._state = 'writable';\n\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n\n stream._writer = undefined;\n\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined!;\n\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n}\n\nfunction IsWritableStream(x: unknown): x is WritableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n\n return x instanceof WritableStream;\n}\n\nfunction IsWritableStreamLocked(stream: WritableStream): boolean {\n assert(IsWritableStream(stream));\n\n if (stream._writer === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamAbort(stream: WritableStream, reason: any): Promise {\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n stream._writableStreamController._abortController?.abort(reason);\n\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state as WritableStreamState;\n\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined!,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest!._promise = promise;\n\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n\n return promise;\n}\n\nfunction WritableStreamClose(stream: WritableStream): Promise {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(\n `The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n\n assert(state === 'writable' || state === 'erroring');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const promise = newPromise((resolve, reject) => {\n const closeRequest: CloseRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._closeRequest = closeRequest;\n });\n\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n\n return promise;\n}\n\n// WritableStream API exposed for controllers.\n\nfunction WritableStreamAddWriteRequest(stream: WritableStream): Promise {\n assert(IsWritableStreamLocked(stream));\n assert(stream._state === 'writable');\n\n const promise = newPromise((resolve, reject) => {\n const writeRequest: WriteRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._writeRequests.push(writeRequest);\n });\n\n return promise;\n}\n\nfunction WritableStreamDealWithRejection(stream: WritableStream, error: any) {\n const state = stream._state;\n\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n\n assert(state === 'erroring');\n WritableStreamFinishErroring(stream);\n}\n\nfunction WritableStreamStartErroring(stream: WritableStream, reason: any) {\n assert(stream._storedError === undefined);\n assert(stream._state === 'writable');\n\n const controller = stream._writableStreamController;\n assert(controller !== undefined);\n\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n}\n\nfunction WritableStreamFinishErroring(stream: WritableStream) {\n assert(stream._state === 'erroring');\n assert(!WritableStreamHasOperationMarkedInFlight(stream));\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(\n promise,\n () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n },\n (reason: any) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n}\n\nfunction WritableStreamFinishInFlightWrite(stream: WritableStream) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n}\n\nfunction WritableStreamFinishInFlightWriteWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._reject(error);\n stream._inFlightWriteRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n WritableStreamDealWithRejection(stream, error);\n}\n\nfunction WritableStreamFinishInFlightClose(stream: WritableStream) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n\n const state = stream._state;\n\n assert(state === 'writable' || state === 'erroring');\n\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n\n stream._state = 'closed';\n\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n\n assert(stream._pendingAbortRequest === undefined);\n assert(stream._storedError === undefined);\n}\n\nfunction WritableStreamFinishInFlightCloseWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._reject(error);\n stream._inFlightCloseRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n}\n\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream: WritableStream): boolean {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamHasOperationMarkedInFlight(stream: WritableStream): boolean {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamMarkCloseRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightCloseRequest === undefined);\n assert(stream._closeRequest !== undefined);\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n}\n\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightWriteRequest === undefined);\n assert(stream._writeRequests.length !== 0);\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\n\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream: WritableStream) {\n assert(stream._state === 'errored');\n if (stream._closeRequest !== undefined) {\n assert(stream._inFlightCloseRequest === undefined);\n\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n}\n\nfunction WritableStreamUpdateBackpressure(stream: WritableStream, backpressure: boolean) {\n assert(stream._state === 'writable');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n } else {\n assert(!backpressure);\n\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n\n stream._backpressure = backpressure;\n}\n\n/**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\nexport class WritableStreamDefaultWriter {\n /** @internal */\n _ownerWritableStream: WritableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _closedPromiseState!: 'pending' | 'resolved' | 'rejected';\n /** @internal */\n _readyPromise!: Promise;\n /** @internal */\n _readyPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _readyPromise_reject?: (reason: any) => void;\n /** @internal */\n _readyPromiseState!: 'pending' | 'fulfilled' | 'rejected';\n\n constructor(stream: WritableStream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n\n this._ownerWritableStream = stream;\n stream._writer = this;\n\n const state = stream._state;\n\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n } else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n } else {\n assert(state === 'errored');\n\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize(): number | null {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n\n return this._readyPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamDefaultWriterClose(this);\n }\n\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock(): void {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return;\n }\n\n assert(stream._writer !== undefined);\n\n WritableStreamDefaultWriterRelease(this);\n }\n\n /**\n * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully,\n * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return\n * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes\n * errored before the writing process is initiated.\n *\n * Note that what \"success\" means is up to the underlying sink; it might indicate simply that the chunk has been\n * accepted, and not necessarily that it is safely saved to its ultimate destination.\n */\n write(chunk: W): Promise;\n write(chunk: W = undefined!): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n});\nsetFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\nsetFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\nsetFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\nsetFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n}\n\n// Abstract operations for the WritableStreamDefaultWriter.\n\nfunction IsWritableStreamDefaultWriter(x: any): x is WritableStreamDefaultWriter {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultWriter;\n}\n\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultWriterAbort(writer: WritableStreamDefaultWriter, reason: any) {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamAbort(stream, reason);\n}\n\nfunction WritableStreamDefaultWriterClose(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamClose(stream);\n}\n\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n return WritableStreamDefaultWriterClose(writer);\n}\n\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n } else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n } else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterGetDesiredSize(writer: WritableStreamDefaultWriter): number | null {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n\n if (state === 'closed') {\n return 0;\n }\n\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\n\nfunction WritableStreamDefaultWriterRelease(writer: WritableStreamDefaultWriter) {\n const stream = writer._ownerWritableStream;\n assert(stream !== undefined);\n assert(stream._writer === writer);\n\n const releasedError = new TypeError(\n `Writer was released and can no longer be used to monitor the stream's closedness`);\n\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n\n stream._writer = undefined;\n writer._ownerWritableStream = undefined!;\n}\n\nfunction WritableStreamDefaultWriterWrite(writer: WritableStreamDefaultWriter, chunk: W): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const controller = stream._writableStreamController;\n\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable');\n\n const promise = WritableStreamAddWriteRequest(stream);\n\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n\n return promise;\n}\n\nconst closeSentinel: unique symbol = {} as any;\n\ntype QueueRecord = W | typeof closeSentinel;\n\n/**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\nexport class WritableStreamDefaultController {\n /** @internal */\n _controlledWritableStream!: WritableStream;\n /** @internal */\n _queue!: SimpleQueue>>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _abortReason: any;\n /** @internal */\n _abortController: AbortController | undefined;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _writeAlgorithm!: (chunk: W) => Promise;\n /** @internal */\n _closeAlgorithm!: () => Promise;\n /** @internal */\n _abortAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason(): any {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('abortReason');\n }\n return this._abortReason;\n }\n\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal(): AbortSignal {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e: any = undefined): void {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n\n WritableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [AbortSteps](reason: any): Promise {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations implementing interface required by the WritableStream.\n\nfunction IsWritableStreamDefaultController(x: any): x is WritableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultController;\n}\n\nfunction SetUpWritableStreamDefaultController(stream: WritableStream,\n controller: WritableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(IsWritableStream(stream));\n assert(stream._writableStreamController === undefined);\n\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(\n startPromise,\n () => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n r => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n }\n );\n}\n\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream: WritableStream,\n underlyingSink: ValidatedUnderlyingSink,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let writeAlgorithm: (chunk: W) => Promise;\n let closeAlgorithm: () => Promise;\n let abortAlgorithm: (reason: any) => Promise;\n\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write!(chunk, controller);\n } else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close!();\n } else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort!(reason);\n } else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpWritableStreamDefaultController(\n stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\nfunction WritableStreamDefaultControllerClearAlgorithms(controller: WritableStreamDefaultController) {\n controller._writeAlgorithm = undefined!;\n controller._closeAlgorithm = undefined!;\n controller._abortAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\nfunction WritableStreamDefaultControllerClose(controller: WritableStreamDefaultController) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\nfunction WritableStreamDefaultControllerGetChunkSize(controller: WritableStreamDefaultController,\n chunk: W): number {\n try {\n return controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n}\n\nfunction WritableStreamDefaultControllerGetDesiredSize(controller: WritableStreamDefaultController): number {\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nfunction WritableStreamDefaultControllerWrite(controller: WritableStreamDefaultController,\n chunk: W,\n chunkSize: number) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\n// Abstract operations for the WritableStreamDefaultController.\n\nfunction WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n if (!controller._started) {\n return;\n }\n\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n\n const state = stream._state;\n assert(state !== 'closed' && state !== 'errored');\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n\n if (controller._queue.length === 0) {\n return;\n }\n\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n } else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n}\n\nfunction WritableStreamDefaultControllerErrorIfNeeded(controller: WritableStreamDefaultController, error: any) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n}\n\nfunction WritableStreamDefaultControllerProcessClose(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkCloseRequestInFlight(stream);\n\n DequeueValue(controller);\n assert(controller._queue.length === 0);\n\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(\n sinkClosePromise,\n () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n },\n reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerProcessWrite(controller: WritableStreamDefaultController, chunk: W) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(\n sinkWritePromise,\n () => {\n WritableStreamFinishInFlightWrite(stream);\n\n const state = stream._state;\n assert(state === 'writable' || state === 'erroring');\n\n DequeueValue(controller);\n\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerGetBackpressure(controller: WritableStreamDefaultController): boolean {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n}\n\n// A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultControllerError(controller: WritableStreamDefaultController, error: any) {\n const stream = controller._controlledWritableStream;\n\n assert(stream._state === 'writable');\n\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n}\n\n// Helper functions for the WritableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n}\n\n// Helper functions for the WritableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n}\n\n\n// Helper functions for the WritableStreamDefaultWriter.\n\nfunction defaultWriterBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n}\n\nfunction defaultWriterLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n}\n\nfunction defaultWriterClosedPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n}\n\nfunction defaultWriterClosedPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n}\n\nfunction defaultWriterClosedPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n}\n\nfunction defaultWriterClosedPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._closedPromise_resolve === undefined);\n assert(writer._closedPromise_reject === undefined);\n assert(writer._closedPromiseState !== 'pending');\n\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n}\n\nfunction defaultWriterReadyPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n}\n\nfunction defaultWriterReadyPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n}\n\nfunction defaultWriterReadyPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n}\n\nfunction defaultWriterReadyPromiseReset(writer: WritableStreamDefaultWriter) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitialize(writer);\n}\n\nfunction defaultWriterReadyPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n}\n","/// \n\nfunction getGlobals(): typeof globalThis | undefined {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n } else if (typeof self !== 'undefined') {\n return self;\n } else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n}\n\nexport const globals = getGlobals();\n","/// \nimport { globals } from '../globals';\nimport { setFunctionName } from '../lib/helpers/miscellaneous';\n\ninterface DOMException extends Error {\n name: string;\n message: string;\n}\n\ntype DOMExceptionConstructor = new (message?: string, name?: string) => DOMException;\n\nfunction isDOMExceptionConstructor(ctor: unknown): ctor is DOMExceptionConstructor {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if ((ctor as DOMExceptionConstructor).name !== 'DOMException') {\n return false;\n }\n try {\n new (ctor as DOMExceptionConstructor)();\n return true;\n } catch {\n return false;\n }\n}\n\n/**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\nfunction getFromGlobal(): DOMExceptionConstructor | undefined {\n const ctor = globals?.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n}\n\n/**\n * Support:\n * - All platforms\n */\nfunction createPolyfill(): DOMExceptionConstructor {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(this: DOMException, message?: string, name?: string) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n } as any;\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-redeclare\nconst DOMException: DOMExceptionConstructor = getFromGlobal() || createPolyfill();\n\nexport { DOMException };\n","import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';\nimport { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireWritableStreamDefaultWriter,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamCloseQueuedOrInFlight,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite\n} from '../writable-stream';\nimport assert from '../../stub/assert';\nimport {\n newPromise,\n PerformPromiseThen,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponFulfillment,\n uponPromise,\n uponRejection\n} from '../helpers/webidl';\nimport { noop } from '../../utils';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\nimport { DOMException } from '../../stub/dom-exception';\n\nexport function ReadableStreamPipeTo(source: ReadableStream,\n dest: WritableStream,\n preventClose: boolean,\n preventAbort: boolean,\n preventCancel: boolean,\n signal: AbortSignal | undefined): Promise {\n assert(IsReadableStream(source));\n assert(IsWritableStream(dest));\n assert(typeof preventClose === 'boolean');\n assert(typeof preventAbort === 'boolean');\n assert(typeof preventCancel === 'boolean');\n assert(signal === undefined || isAbortSignal(signal));\n assert(!IsReadableStreamLocked(source));\n assert(!IsWritableStreamLocked(dest));\n\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n\n source._disturbed = true;\n\n let shuttingDown = false;\n\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n\n return newPromise((resolve, reject) => {\n let abortAlgorithm: () => void;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions: Array<() => Promise> = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n\n signal.addEventListener('abort', abortAlgorithm);\n }\n\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done: boolean) {\n if (done) {\n resolveLoop();\n } else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n\n next(false);\n });\n }\n\n function pipeStep(): Promise {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(\n reader,\n {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n }\n );\n });\n });\n }\n\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n } else {\n shutdown();\n }\n return null;\n });\n\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n } else {\n shutdown(true, destClosed);\n }\n }\n\n setPromiseIsHandledToTrue(pipeLoop());\n\n function waitForWritesToFinish(): Promise {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(\n currentWrite,\n () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined\n );\n }\n\n function isOrBecomesErrored(stream: ReadableStream | WritableStream,\n promise: Promise,\n action: (reason: any) => null) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n } else {\n uponRejection(promise, action);\n }\n }\n\n function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise, action: () => null) {\n if (stream._state === 'closed') {\n action();\n } else {\n uponFulfillment(promise, action);\n }\n }\n\n function shutdownWithAction(action: () => Promise, originalIsError?: boolean, originalError?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n } else {\n doTheRest();\n }\n\n function doTheRest(): null {\n uponPromise(\n action(),\n () => finalize(originalIsError, originalError),\n newError => finalize(true, newError)\n );\n return null;\n }\n }\n\n function shutdown(isError?: boolean, error?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n } else {\n finalize(isError, error);\n }\n }\n\n function finalize(isError?: boolean, error?: any): null {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n } else {\n resolve(undefined);\n }\n\n return null;\n }\n });\n}\n","import type { QueuingStrategySizeCallback } from '../queuing-strategy';\nimport assert from '../../stub/assert';\nimport { DequeueValue, EnqueueValueWithSize, type QueuePair, ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n type ReadRequest\n} from './default-reader';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsReadableStreamLocked, ReadableStream, ReadableStreamClose, ReadableStreamError } from '../readable-stream';\nimport type { ValidatedUnderlyingSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\n\n/**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableStreamDefaultController {\n /** @internal */\n _controlledReadableStream!: ReadableStream;\n /** @internal */\n _queue!: SimpleQueue>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('close');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n\n ReadableStreamDefaultControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the controlled readable stream.\n */\n enqueue(chunk: R): void;\n enqueue(chunk: R = undefined!): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n ReadableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest): void {\n const stream = this._controlledReadableStream;\n\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n } else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n\n readRequest._chunkSteps(chunk);\n } else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n // Do nothing.\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\nsetFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableStreamDefaultController.\n\nfunction IsReadableStreamDefaultController(x: any): x is ReadableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultController;\n}\n\nfunction ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController): void {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController): boolean {\n const stream = controller._controlledReadableStream;\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\n// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n\nexport function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n controller._closeRequested = true;\n\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n}\n\nexport function ReadableStreamDefaultControllerEnqueue(\n controller: ReadableStreamDefaultController,\n chunk: R\n): void {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n } else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController, e: any) {\n const stream = controller._controlledReadableStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ResetQueue(controller);\n\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableStreamDefaultControllerGetDesiredSize(\n controller: ReadableStreamDefaultController\n): number | null {\n const state = controller._controlledReadableStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\n// This is used in the implementation of TransformStream.\nexport function ReadableStreamDefaultControllerHasBackpressure(\n controller: ReadableStreamDefaultController\n): boolean {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n\n return true;\n}\n\nexport function ReadableStreamDefaultControllerCanCloseOrEnqueue(\n controller: ReadableStreamDefaultController\n): boolean {\n const state = controller._controlledReadableStream._state;\n\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n\n return false;\n}\n\nexport function SetUpReadableStreamDefaultController(stream: ReadableStream,\n controller: ReadableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(stream._readableStreamController === undefined);\n\n controller._controlledReadableStream = stream;\n\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n stream: ReadableStream,\n underlyingSource: ValidatedUnderlyingSource,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback\n) {\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// Helper functions for the ReadableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n}\n","import {\n CreateReadableByteStream,\n CreateReadableStream,\n type DefaultReadableStream,\n IsReadableStream,\n type ReadableByteStream,\n ReadableStream,\n ReadableStreamCancel,\n type ReadableStreamReader\n} from '../readable-stream';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadRequest\n} from './default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReaderRead,\n type ReadIntoRequest\n} from './byob-reader';\nimport assert from '../../stub/assert';\nimport { newPromise, promiseResolvedWith, queueMicrotask, uponRejection } from '../helpers/webidl';\nimport {\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError\n} from './default-controller';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamControllerClose,\n ReadableByteStreamControllerEnqueue,\n ReadableByteStreamControllerError,\n ReadableByteStreamControllerGetBYOBRequest,\n ReadableByteStreamControllerRespond,\n ReadableByteStreamControllerRespondWithNewView\n} from './byte-stream-controller';\nimport { CreateArrayFromList } from '../abstract-ops/ecmascript';\nimport { CloneAsUint8Array } from '../abstract-ops/miscellaneous';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function ReadableStreamTee(stream: ReadableStream,\n cloneForBranch2: boolean): [ReadableStream, ReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream as unknown as ReadableByteStream) as\n unknown as [ReadableStream, ReadableStream];\n }\n return ReadableStreamDefaultTee(stream, cloneForBranch2);\n}\n\nexport function ReadableStreamDefaultTee(\n stream: ReadableStream,\n cloneForBranch2: boolean\n): [DefaultReadableStream, DefaultReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n\n const reader = AcquireReadableStreamDefaultReader(stream);\n\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: DefaultReadableStream;\n let branch2: DefaultReadableStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function pullAlgorithm(): Promise {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm() {\n // do nothing\n }\n\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n\n uponRejection(reader._closedPromise, (r: any) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n\n return [branch1, branch2];\n}\n\nexport function ReadableByteStreamTee(stream: ReadableByteStream): [ReadableByteStream, ReadableByteStream] {\n assert(IsReadableStream(stream));\n assert(IsReadableByteStreamController(stream._readableStreamController));\n\n let reader: ReadableStreamReader> = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: ReadableByteStream;\n let branch2: ReadableByteStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function forwardReaderError(thisReader: ReadableStreamReader>) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n assert(reader._readIntoRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n\n const readRequest: ReadRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n\n function pullWithBYOBReader(view: NonShared, forBranch2: boolean) {\n if (IsReadableStreamDefaultReader>(reader)) {\n assert(reader._readRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n\n const readIntoRequest: ReadIntoRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n } else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n\n if (chunk !== undefined) {\n assert(chunk.byteLength === 0);\n\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n\n function pull1Algorithm(): Promise {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, false);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function pull2Algorithm(): Promise {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, true);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm(): void {\n return;\n }\n\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n\n forwardReaderError(reader);\n\n return [branch1, branch2];\n}\n","import { typeIsObject } from '../helpers/miscellaneous';\nimport type { ReadableStreamDefaultReadResult } from './default-reader';\n\n/**\n * A common interface for a `ReadadableStream` implementation.\n *\n * @public\n */\nexport interface ReadableStreamLike {\n readonly locked: boolean;\n\n getReader(): ReadableStreamDefaultReaderLike;\n}\n\n/**\n * A common interface for a `ReadableStreamDefaultReader` implementation.\n *\n * @public\n */\nexport interface ReadableStreamDefaultReaderLike {\n readonly closed: Promise;\n\n cancel(reason?: any): Promise;\n\n read(): Promise>;\n\n releaseLock(): void;\n}\n\nexport function isReadableStreamLike(stream: unknown): stream is ReadableStreamLike {\n return typeIsObject(stream) && typeof (stream as ReadableStreamLike).getReader !== 'undefined';\n}\n","import { CreateReadableStream, type DefaultReadableStream } from '../readable-stream';\nimport {\n isReadableStreamLike,\n type ReadableStreamDefaultReaderLike,\n type ReadableStreamLike\n} from './readable-stream-like';\nimport { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue } from './default-controller';\nimport { GetIterator, GetMethod, IteratorComplete, IteratorNext, IteratorValue } from '../abstract-ops/ecmascript';\nimport { promiseRejectedWith, promiseResolvedWith, reflectCall, transformPromiseWith } from '../helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport { noop } from '../../utils';\n\nexport function ReadableStreamFrom(\n source: Iterable | AsyncIterable | ReadableStreamLike\n): DefaultReadableStream {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n}\n\nexport function ReadableStreamFromIterable(asyncIterable: Iterable | AsyncIterable): DefaultReadableStream {\n let stream: DefaultReadableStream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n const iterator = iteratorRecord.iterator;\n let returnMethod: (typeof iterator)['return'] | undefined;\n try {\n returnMethod = GetMethod(iterator, 'return');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult: IteratorResult | Promise>;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n\nexport function ReadableStreamFromDefaultReader(\n reader: ReadableStreamDefaultReaderLike\n): DefaultReadableStream {\n let stream: DefaultReadableStream;\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let readPromise;\n try {\n readPromise = reader.read();\n } catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n } catch (e) {\n return promiseRejectedWith(e);\n }\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n","import { assertDictionary, assertFunction, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamController,\n UnderlyingByteSource,\n UnderlyingDefaultOrByteSource,\n UnderlyingDefaultOrByteSourcePullCallback,\n UnderlyingDefaultOrByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n ValidatedUnderlyingDefaultOrByteSource\n} from '../readable-stream/underlying-source';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\n\nexport function convertUnderlyingDefaultOrByteSource(\n source: UnderlyingSource | UnderlyingByteSource | null,\n context: string\n): ValidatedUnderlyingDefaultOrByteSource {\n assertDictionary(source, context);\n const original = source as (UnderlyingDefaultOrByteSource | null);\n const autoAllocateChunkSize = original?.autoAllocateChunkSize;\n const cancel = original?.cancel;\n const pull = original?.pull;\n const start = original?.start;\n const type = original?.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(\n autoAllocateChunkSize,\n `${context} has member 'autoAllocateChunkSize' that`\n ),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original!, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original!, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n}\n\nfunction convertUnderlyingSourceCancelCallback(\n fn: UnderlyingSourceCancelCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSourcePullCallback(\n fn: UnderlyingDefaultOrByteSourcePullCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (controller: ReadableStreamController) => Promise {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSourceStartCallback(\n fn: UnderlyingDefaultOrByteSourceStartCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): UnderlyingDefaultOrByteSourceStartCallback {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertReadableStreamType(type: string, context: string): 'bytes' {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n}\n","import { assertDictionary } from './basic';\nimport type {\n ReadableStreamIteratorOptions,\n ValidatedReadableStreamIteratorOptions\n} from '../readable-stream/iterator-options';\n\nexport function convertIteratorOptions(options: ReadableStreamIteratorOptions | null | undefined,\n context: string): ValidatedReadableStreamIteratorOptions {\n assertDictionary(options, context);\n const preventCancel = options?.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n}\n","import { assertDictionary } from './basic';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from '../readable-stream/pipe-options';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\n\nexport function convertPipeOptions(options: StreamPipeOptions | null | undefined,\n context: string): ValidatedStreamPipeOptions {\n assertDictionary(options, context);\n const preventAbort = options?.preventAbort;\n const preventCancel = options?.preventCancel;\n const preventClose = options?.preventClose;\n const signal = options?.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n}\n\nfunction assertAbortSignal(signal: unknown, context: string): asserts signal is AbortSignal {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n}\n","import { assertDictionary, assertRequiredField } from './basic';\nimport { ReadableStream } from '../readable-stream';\nimport { WritableStream } from '../writable-stream';\nimport { assertReadableStream } from './readable-stream';\nimport { assertWritableStream } from './writable-stream';\n\nexport function convertReadableWritablePair(\n pair: { readable: RS; writable: WS } | null | undefined,\n context: string\n): { readable: RS; writable: WS } {\n assertDictionary(pair, context);\n\n const readable = pair?.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n\n const writable = pair?.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n\n return { readable, writable };\n}\n","import assert from '../stub/assert';\nimport {\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith\n} from './helpers/webidl';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { AcquireReadableStreamAsyncIterator, type ReadableStreamAsyncIterator } from './readable-stream/async-iterator';\nimport { defaultReaderClosedPromiseReject, defaultReaderClosedPromiseResolve } from './readable-stream/generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderErrorReadRequests,\n type ReadableStreamDefaultReadResult\n} from './readable-stream/default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBReaderErrorReadIntoRequests,\n type ReadableStreamBYOBReadResult\n} from './readable-stream/byob-reader';\nimport { ReadableStreamPipeTo } from './readable-stream/pipe';\nimport { ReadableStreamTee } from './readable-stream/tee';\nimport { ReadableStreamFrom } from './readable-stream/from';\nimport { IsWritableStream, IsWritableStreamLocked, WritableStream } from './writable-stream';\nimport { SimpleQueue } from './simple-queue';\nimport {\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n SetUpReadableByteStreamController,\n SetUpReadableByteStreamControllerFromUnderlyingSource\n} from './readable-stream/byte-stream-controller';\nimport {\n ReadableStreamDefaultController,\n SetUpReadableStreamDefaultController,\n SetUpReadableStreamDefaultControllerFromUnderlyingSource\n} from './readable-stream/default-controller';\nimport type {\n UnderlyingByteSource,\n UnderlyingByteSourcePullCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceStartCallback\n} from './readable-stream/underlying-source';\nimport { noop } from '../utils';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { CreateArrayFromList, SymbolAsyncIterator } from './abstract-ops/ecmascript';\nimport { CancelSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertUnderlyingDefaultOrByteSource } from './validators/underlying-source';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions\n} from './readable-stream/reader-options';\nimport { convertReaderOptions } from './validators/reader-options';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from './readable-stream/pipe-options';\nimport type { ReadableStreamIteratorOptions } from './readable-stream/iterator-options';\nimport { convertIteratorOptions } from './validators/iterator-options';\nimport { convertPipeOptions } from './validators/pipe-options';\nimport type { ReadableWritablePair } from './readable-stream/readable-writable-pair';\nimport { convertReadableWritablePair } from './validators/readable-writable-pair';\nimport type { ReadableStreamDefaultReaderLike, ReadableStreamLike } from './readable-stream/readable-stream-like';\nimport type { NonShared } from './helpers/array-buffer-view';\n\nexport type DefaultReadableStream = ReadableStream & {\n _readableStreamController: ReadableStreamDefaultController\n};\n\nexport type ReadableByteStream = ReadableStream> & {\n _readableStreamController: ReadableByteStreamController\n};\n\ntype ReadableStreamState = 'readable' | 'closed' | 'errored';\n\n/**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\nexport class ReadableStream implements AsyncIterable {\n /** @internal */\n _state!: ReadableStreamState;\n /** @internal */\n _reader: ReadableStreamReader | undefined;\n /** @internal */\n _storedError: any;\n /** @internal */\n _disturbed!: boolean;\n /** @internal */\n _readableStreamController!: ReadableStreamDefaultController | ReadableByteStreamController;\n\n constructor(underlyingSource: UnderlyingByteSource, strategy?: { highWaterMark?: number; size?: undefined });\n constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSource: UnderlyingSource | UnderlyingByteSource | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n } else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n\n InitializeReadableStream(this);\n\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(\n this as unknown as ReadableByteStream,\n underlyingSource,\n highWaterMark\n );\n } else {\n assert(underlyingSource.type === undefined);\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n this,\n underlyingSource,\n highWaterMark,\n sizeAlgorithm\n );\n }\n }\n\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked(): boolean {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsReadableStreamLocked(this);\n }\n\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('cancel'));\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n\n return ReadableStreamCancel(this, reason);\n }\n\n /**\n * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader.\n *\n * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams,\n * i.e. streams which were constructed specifically with the ability to handle \"bring your own buffer\" reading.\n * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its\n * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise\n * control over allocation.\n */\n getReader({ mode }: { mode: 'byob' }): ReadableStreamBYOBReader;\n /**\n * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader.\n * While the stream is locked, no other reader can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to consume a stream\n * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours\n * or cancel the stream, which would interfere with your abstraction.\n */\n getReader(): ReadableStreamDefaultReader;\n getReader(\n rawOptions: ReadableStreamGetReaderOptions | null | undefined = undefined\n ): ReadableStreamDefaultReader | ReadableStreamBYOBReader {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('getReader');\n }\n\n const options = convertReaderOptions(rawOptions, 'First parameter');\n\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n\n assert(options.mode === 'byob');\n return AcquireReadableStreamBYOBReader(this as unknown as ReadableByteStream);\n }\n\n /**\n * Provides a convenient, chainable way of piping this readable stream through a transform stream\n * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream\n * into the writable side of the supplied pair, and returns the readable side for further use.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeThrough(\n transform: { readable: RS; writable: WritableStream },\n options?: StreamPipeOptions\n ): RS;\n pipeThrough(\n rawTransform: { readable: RS; writable: WritableStream } | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}\n ): RS {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n\n const promise = ReadableStreamPipeTo(\n this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n\n setPromiseIsHandledToTrue(promise);\n\n return transform.readable;\n }\n\n /**\n * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under\n * various error conditions can be customized with a number of passed options. It returns a promise that fulfills\n * when the piping process completes successfully, or rejects if any errors were encountered.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise;\n pipeTo(destination: WritableStream | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('pipeTo'));\n }\n\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(\n new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)\n );\n }\n\n let options: ValidatedStreamPipeOptions;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')\n );\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')\n );\n }\n\n return ReadableStreamPipeTo(\n this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n }\n\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee(): [ReadableStream, ReadableStream] {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('tee');\n }\n\n const branches = ReadableStreamTee(this, false);\n return CreateArrayFromList(branches);\n }\n\n /**\n * Asynchronously iterates over the chunks in the stream's internal queue.\n *\n * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader.\n * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method\n * is called, e.g. by breaking out of the loop.\n *\n * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also\n * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing\n * `true` for the `preventCancel` option.\n */\n values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n values(rawOptions: ReadableStreamIteratorOptions | null | undefined = undefined): ReadableStreamAsyncIterator {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('values');\n }\n\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n\n /**\n * {@inheritDoc ReadableStream.values}\n */\n [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n\n [SymbolAsyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator {\n // Stub implementation, overridden below\n return this.values(options);\n }\n\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream {\n return ReadableStreamFrom(asyncIterable);\n }\n}\n\nObject.defineProperties(ReadableStream, {\n from: { enumerable: true }\n});\nObject.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(ReadableStream.from, 'from');\nsetFunctionName(ReadableStream.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStream.prototype.getReader, 'getReader');\nsetFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\nsetFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\nsetFunctionName(ReadableStream.prototype.tee, 'tee');\nsetFunctionName(ReadableStream.prototype.values, 'values');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n}\nObject.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n});\n\nexport type {\n ReadableStreamAsyncIterator,\n ReadableStreamDefaultReadResult,\n ReadableStreamBYOBReadResult,\n ReadableStreamBYOBReaderReadOptions,\n UnderlyingByteSource,\n UnderlyingSource,\n UnderlyingSourceStartCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceCancelCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingByteSourcePullCallback,\n StreamPipeOptions,\n ReadableWritablePair,\n ReadableStreamIteratorOptions,\n ReadableStreamLike,\n ReadableStreamDefaultReaderLike\n};\n\n// Abstract operations for the ReadableStream.\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1\n): DefaultReadableStream {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: DefaultReadableStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n\n return stream;\n}\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableByteStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise\n): ReadableByteStream {\n const stream: ReadableByteStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n\n return stream;\n}\n\nfunction InitializeReadableStream(stream: ReadableStream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n}\n\nexport function IsReadableStream(x: unknown): x is ReadableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStream;\n}\n\nexport function IsReadableStreamDisturbed(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n return stream._disturbed;\n}\n\nexport function IsReadableStreamLocked(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n if (stream._reader === undefined) {\n return false;\n }\n\n return true;\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamCancel(stream: ReadableStream, reason: any): Promise {\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n ReadableStreamClose(stream);\n\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n}\n\nexport function ReadableStreamClose(stream: ReadableStream): void {\n assert(stream._state === 'readable');\n\n stream._state = 'closed';\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseResolve(reader);\n\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n}\n\nexport function ReadableStreamError(stream: ReadableStream, e: any): void {\n assert(IsReadableStream(stream));\n assert(stream._state === 'readable');\n\n stream._state = 'errored';\n stream._storedError = e;\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseReject(reader, e);\n\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n } else {\n assert(IsReadableStreamBYOBReader(reader));\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n}\n\n// Readers\n\nexport type ReadableStreamReader = ReadableStreamDefaultReader | ReadableStreamBYOBReader;\n\nexport {\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader\n};\n\n// Controllers\n\nexport {\n ReadableStreamDefaultController,\n ReadableStreamBYOBRequest,\n ReadableByteStreamController\n};\n\n// Helper functions for the ReadableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n}\n","import type { QueuingStrategyInit } from '../queuing-strategy';\nimport { assertDictionary, assertRequiredField, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategyInit(init: QueuingStrategyInit | null | undefined,\n context: string): QueuingStrategyInit {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst byteLengthSizeFunction = (chunk: ArrayBufferView): number => {\n return chunk.byteLength;\n};\nsetFunctionName(byteLengthSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\nexport default class ByteLengthQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _byteLengthQueuingStrategyHighWaterMark: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size(): (chunk: ArrayBufferView) => number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n}\n\nObject.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the ByteLengthQueuingStrategy.\n\nfunction byteLengthBrandCheckException(name: string): TypeError {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n}\n\nexport function IsByteLengthQueuingStrategy(x: any): x is ByteLengthQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof ByteLengthQueuingStrategy;\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst countSizeFunction = (): 1 => {\n return 1;\n};\nsetFunctionName(countSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\nexport default class CountQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _countQueuingStrategyHighWaterMark!: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size(): (chunk: any) => 1 {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n}\n\nObject.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the CountQueuingStrategy.\n\nfunction countBrandCheckException(name: string): TypeError {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n}\n\nexport function IsCountQueuingStrategy(x: any): x is CountQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof CountQueuingStrategy;\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from '../transform-stream/transformer';\nimport { TransformStreamDefaultController } from '../transform-stream';\n\nexport function convertTransformer(original: Transformer | null,\n context: string): ValidatedTransformer {\n assertDictionary(original, context);\n const cancel = original?.cancel;\n const flush = original?.flush;\n const readableType = original?.readableType;\n const start = original?.start;\n const transform = original?.transform;\n const writableType = original?.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original!, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original!, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original!, `${context} has member 'transform' that`),\n writableType\n };\n}\n\nfunction convertTransformerFlushCallback(\n fn: TransformerFlushCallback,\n original: Transformer,\n context: string\n): (controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertTransformerStartCallback(\n fn: TransformerStartCallback,\n original: Transformer,\n context: string\n): TransformerStartCallback {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertTransformerTransformCallback(\n fn: TransformerTransformCallback,\n original: Transformer,\n context: string\n): (chunk: I, controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: I, controller: TransformStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n\nfunction convertTransformerCancelCallback(\n fn: TransformerCancelCallback,\n original: Transformer,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith,\n uponPromise\n} from './helpers/webidl';\nimport { CreateReadableStream, type DefaultReadableStream, ReadableStream } from './readable-stream';\nimport {\n ReadableStreamDefaultControllerCanCloseOrEnqueue,\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError,\n ReadableStreamDefaultControllerGetDesiredSize,\n ReadableStreamDefaultControllerHasBackpressure\n} from './readable-stream/default-controller';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { CreateWritableStream, WritableStream, WritableStreamDefaultControllerErrorIfNeeded } from './writable-stream';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from './transform-stream/transformer';\nimport { convertTransformer } from './validators/transformer';\n\n// Class TransformStream\n\n/**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\nexport class TransformStream {\n /** @internal */\n _writable!: WritableStream;\n /** @internal */\n _readable!: DefaultReadableStream;\n /** @internal */\n _backpressure!: boolean;\n /** @internal */\n _backpressureChangePromise!: Promise;\n /** @internal */\n _backpressureChangePromise_resolve!: () => void;\n /** @internal */\n _transformStreamController!: TransformStreamDefaultController;\n\n constructor(\n transformer?: Transformer,\n writableStrategy?: QueuingStrategy,\n readableStrategy?: QueuingStrategy\n );\n constructor(rawTransformer: Transformer | null | undefined = {},\n rawWritableStrategy: QueuingStrategy | null | undefined = {},\n rawReadableStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(\n this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm\n );\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n } else {\n startPromise_resolve(undefined);\n }\n }\n\n /**\n * The readable side of the transform stream.\n */\n get readable(): ReadableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n\n return this._readable;\n }\n\n /**\n * The writable side of the transform stream.\n */\n get writable(): WritableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n\n return this._writable;\n }\n}\n\nObject.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n}\n\nexport type {\n Transformer,\n TransformerCancelCallback,\n TransformerStartCallback,\n TransformerFlushCallback,\n TransformerTransformCallback\n};\n\n// Transform Stream Abstract Operations\n\nexport function CreateTransformStream(startAlgorithm: () => void | PromiseLike,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n writableHighWaterMark = 1,\n writableSizeAlgorithm: QueuingStrategySizeCallback = () => 1,\n readableHighWaterMark = 0,\n readableSizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(writableHighWaterMark));\n assert(IsNonNegativeNumber(readableHighWaterMark));\n\n const stream: TransformStream = Object.create(TransformStream.prototype);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n\n const startResult = startAlgorithm();\n startPromise_resolve(startResult);\n return stream;\n}\n\nfunction InitializeTransformStream(stream: TransformStream,\n startPromise: Promise,\n writableHighWaterMark: number,\n writableSizeAlgorithm: QueuingStrategySizeCallback,\n readableHighWaterMark: number,\n readableSizeAlgorithm: QueuingStrategySizeCallback) {\n function startAlgorithm(): Promise {\n return startPromise;\n }\n\n function writeAlgorithm(chunk: I): Promise {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n\n function abortAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n\n function closeAlgorithm(): Promise {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm,\n writableHighWaterMark, writableSizeAlgorithm);\n\n function pullAlgorithm(): Promise {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n\n function cancelAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined!;\n stream._backpressureChangePromise = undefined!;\n stream._backpressureChangePromise_resolve = undefined!;\n TransformStreamSetBackpressure(stream, true);\n\n stream._transformStreamController = undefined!;\n}\n\nfunction IsTransformStream(x: unknown): x is TransformStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n\n return x instanceof TransformStream;\n}\n\n// This is a no-op if both sides are already errored.\nfunction TransformStreamError(stream: TransformStream, e: any) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n}\n\nfunction TransformStreamErrorWritableAndUnblockWrite(stream: TransformStream, e: any) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n}\n\nfunction TransformStreamUnblockWrite(stream: TransformStream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. 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It can be negative, if the queue is over-full.\n */\n get desiredSize(): number | null {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n const readableController = this._controlledTransformStream._readable._readableStreamController;\n return ReadableStreamDefaultControllerGetDesiredSize(readableController);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the readable side of the controlled transform stream.\n */\n enqueue(chunk: O): void;\n enqueue(chunk: O = undefined!): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n TransformStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors both the readable side and the writable side of the controlled transform stream, making all future\n * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.\n */\n error(reason: any = undefined): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n TransformStreamDefaultControllerError(this, reason);\n }\n\n /**\n * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate(): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n\n TransformStreamDefaultControllerTerminate(this);\n }\n}\n\nObject.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(TransformStreamDefaultController.prototype.error, 'error');\nsetFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n}\n\n// Transform Stream Default Controller Abstract Operations\n\nfunction IsTransformStreamDefaultController(x: any): x is TransformStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n\n return x instanceof TransformStreamDefaultController;\n}\n\nfunction SetUpTransformStreamDefaultController(stream: TransformStream,\n controller: TransformStreamDefaultController,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise) {\n assert(IsTransformStream(stream));\n assert(stream._transformStreamController === undefined);\n\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nfunction SetUpTransformStreamDefaultControllerFromTransformer(stream: TransformStream,\n transformer: ValidatedTransformer) {\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n let transformAlgorithm: (chunk: I) => Promise;\n let flushAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform!(chunk, controller);\n } else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk as unknown as O);\n return promiseResolvedWith(undefined);\n } catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush!(controller);\n } else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n}\n\nfunction TransformStreamDefaultControllerClearAlgorithms(controller: TransformStreamDefaultController) {\n controller._transformAlgorithm = undefined!;\n controller._flushAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\nfunction TransformStreamDefaultControllerEnqueue(controller: TransformStreamDefaultController, chunk: O) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n\n // We throttle transform invocations based on the backpressure of the ReadableStream, but we still\n // accept TransformStreamDefaultControllerEnqueue() calls.\n\n try {\n ReadableStreamDefaultControllerEnqueue(readableController, chunk);\n } catch (e) {\n // This happens when readableStrategy.size() throws.\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n\n throw stream._readable._storedError;\n }\n\n const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);\n if (backpressure !== stream._backpressure) {\n assert(backpressure);\n TransformStreamSetBackpressure(stream, true);\n }\n}\n\nfunction TransformStreamDefaultControllerError(controller: TransformStreamDefaultController, e: any) {\n TransformStreamError(controller._controlledTransformStream, e);\n}\n\nfunction TransformStreamDefaultControllerPerformTransform(controller: TransformStreamDefaultController,\n chunk: I) {\n const transformPromise = controller._transformAlgorithm(chunk);\n return transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n}\n\nfunction TransformStreamDefaultControllerTerminate(controller: TransformStreamDefaultController) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n\n ReadableStreamDefaultControllerClose(readableController);\n\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n}\n\n// TransformStreamDefaultSink Algorithms\n\nfunction TransformStreamDefaultSinkWriteAlgorithm(stream: TransformStream, chunk: I): Promise {\n assert(stream._writable._state === 'writable');\n\n const controller = stream._transformStreamController;\n\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n assert(backpressureChangePromise !== undefined);\n return transformPromiseWith(backpressureChangePromise, () => {\n const writable = stream._writable;\n const state = writable._state;\n if (state === 'erroring') {\n throw writable._storedError;\n }\n assert(state === 'writable');\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n });\n }\n\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n}\n\nfunction TransformStreamDefaultSinkAbortAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally,\n // we don't run the _cancelAlgorithm again.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerError(readable._readableStreamController, reason);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\nfunction TransformStreamDefaultSinkCloseAlgorithm(stream: TransformStream): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// TransformStreamDefaultSource Algorithms\n\nfunction TransformStreamDefaultSourcePullAlgorithm(stream: TransformStream): Promise {\n // Invariant. Enforced by the promises returned by start() and pull().\n assert(stream._backpressure);\n\n assert(stream._backpressureChangePromise !== undefined);\n\n TransformStreamSetBackpressure(stream, false);\n\n // Prevent the next pull() call until there is backpressure.\n return stream._backpressureChangePromise;\n}\n\nfunction TransformStreamDefaultSourceCancelAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._writable cannot change after construction, so caching it across a call to user code is safe.\n const writable = stream._writable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or\n // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the\n // _flushAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (writable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, writable._storedError);\n } else {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// Helper functions for the TransformStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n}\n\nexport function defaultControllerFinishPromiseResolve(controller: TransformStreamDefaultController) {\n if (controller._finishPromise_resolve === undefined) {\n return;\n }\n\n controller._finishPromise_resolve();\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nexport function defaultControllerFinishPromiseReject(controller: TransformStreamDefaultController, reason: any) {\n if (controller._finishPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(controller._finishPromise!);\n controller._finishPromise_reject(reason);\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\n// Helper functions for the TransformStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStream.prototype.${name} can only be used on a TransformStream`);\n}\n","import {\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n ReadableByteStreamController,\n ReadableStream,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultController,\n ReadableStreamDefaultReader,\n TransformStream,\n TransformStreamDefaultController,\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter\n} from './ponyfill';\nimport { globals } from './globals';\n\n// Export\nexport * from './ponyfill';\n\nconst exports = {\n ReadableStream,\n ReadableStreamDefaultController,\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader,\n\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter,\n\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n\n TransformStream,\n TransformStreamDefaultController\n};\n\n// Add classes to global scope\nif (typeof 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\ No newline at end of file diff --git a/node_modules/web-streams-polyfill/dist/polyfill.js b/node_modules/web-streams-polyfill/dist/polyfill.js new file mode 100644 index 00000000..a4ebd706 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/polyfill.js @@ -0,0 +1,5011 @@ +/** + * @license + * web-streams-polyfill v3.3.3 + * Copyright 2024 Mattias Buelens, Diwank Singh Tomer and other contributors. + * This code is released under the MIT license. + * SPDX-License-Identifier: MIT + */ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : + typeof define === 'function' && define.amd ? define(['exports'], factory) : + (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.WebStreamsPolyfill = {})); +})(this, (function (exports) { 'use strict'; + + /// + var SymbolPolyfill = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? + Symbol : + function (description) { return "Symbol(".concat(description, ")"); }; + + /****************************************************************************** + Copyright (c) Microsoft Corporation. + + Permission to use, copy, modify, and/or distribute this software for any + purpose with or without fee is hereby granted. + + THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH + REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, + INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR + OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + PERFORMANCE OF THIS SOFTWARE. + ***************************************************************************** */ + /* global Reflect, Promise, SuppressedError, Symbol */ + + + function __generator(thisArg, body) { + var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g; + return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g; + function verb(n) { return function (v) { return step([n, v]); }; } + function step(op) { + if (f) throw new TypeError("Generator is already executing."); + while (g && (g = 0, op[0] && (_ = 0)), _) try { + if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t; + if (y = 0, t) op = [op[0] & 2, t.value]; + switch (op[0]) { + case 0: case 1: t = op; break; + case 4: _.label++; return { value: op[1], done: false }; + case 5: _.label++; y = op[1]; op = [0]; continue; + case 7: op = _.ops.pop(); _.trys.pop(); continue; + default: + if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; } + if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; } + if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; } + if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; } + if (t[2]) _.ops.pop(); + _.trys.pop(); continue; + } + op = body.call(thisArg, _); + } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; } + if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true }; + } + } + + function __values(o) { + var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0; + if (m) return m.call(o); + if (o && typeof o.length === "number") return { + next: function () { + if (o && i >= o.length) o = void 0; + return { value: o && o[i++], done: !o }; + } + }; + throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined."); + } + + function __await(v) { + return this instanceof __await ? (this.v = v, this) : new __await(v); + } + + function __asyncGenerator(thisArg, _arguments, generator) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var g = generator.apply(thisArg, _arguments || []), i, q = []; + return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i; + function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; } + function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } } + function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); } + function fulfill(value) { resume("next", value); } + function reject(value) { resume("throw", value); } + function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); } + } + + function __asyncDelegator(o) { + var i, p; + return i = {}, verb("next"), verb("throw", function (e) { throw e; }), verb("return"), i[Symbol.iterator] = function () { return this; }, i; + function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; } + } + + function __asyncValues(o) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var m = o[Symbol.asyncIterator], i; + return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i); + function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; } + function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); } + } + + typeof SuppressedError === "function" ? SuppressedError : function (error, suppressed, message) { + var e = new Error(message); + return e.name = "SuppressedError", e.error = error, e.suppressed = suppressed, e; + }; + + function noop() { + return undefined; + } + + function typeIsObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; + } + var rethrowAssertionErrorRejection = noop; + function setFunctionName(fn, name) { + try { + Object.defineProperty(fn, 'name', { + value: name, + configurable: true + }); + } + catch (_a) { + // This property is non-configurable in older browsers, so ignore if this throws. + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility + } + } + + var originalPromise = Promise; + var originalPromiseThen = Promise.prototype.then; + var originalPromiseReject = Promise.reject.bind(originalPromise); + // https://webidl.spec.whatwg.org/#a-new-promise + function newPromise(executor) { + return new originalPromise(executor); + } + // https://webidl.spec.whatwg.org/#a-promise-resolved-with + function promiseResolvedWith(value) { + return newPromise(function (resolve) { return resolve(value); }); + } + // https://webidl.spec.whatwg.org/#a-promise-rejected-with + function promiseRejectedWith(reason) { + return originalPromiseReject(reason); + } + function PerformPromiseThen(promise, onFulfilled, onRejected) { + // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an + // approximation. + return originalPromiseThen.call(promise, onFulfilled, onRejected); + } + // Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned + // from that handler. To prevent this, return null instead of void from all handlers. + // http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it + function uponPromise(promise, onFulfilled, onRejected) { + PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection); + } + function uponFulfillment(promise, onFulfilled) { + uponPromise(promise, onFulfilled); + } + function uponRejection(promise, onRejected) { + uponPromise(promise, undefined, onRejected); + } + function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) { + return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler); + } + function setPromiseIsHandledToTrue(promise) { + PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection); + } + var _queueMicrotask = function (callback) { + if (typeof queueMicrotask === 'function') { + _queueMicrotask = queueMicrotask; + } + else { + var resolvedPromise_1 = promiseResolvedWith(undefined); + _queueMicrotask = function (cb) { return PerformPromiseThen(resolvedPromise_1, cb); }; + } + return _queueMicrotask(callback); + }; + function reflectCall(F, V, args) { + if (typeof F !== 'function') { + throw new TypeError('Argument is not a function'); + } + return Function.prototype.apply.call(F, V, args); + } + function promiseCall(F, V, args) { + try { + return promiseResolvedWith(reflectCall(F, V, args)); + } + catch (value) { + return promiseRejectedWith(value); + } + } + + // Original from Chromium + // https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js + var QUEUE_MAX_ARRAY_SIZE = 16384; + /** + * Simple queue structure. + * + * Avoids scalability issues with using a packed array directly by using + * multiple arrays in a linked list and keeping the array size bounded. + */ + var SimpleQueue = /** @class */ (function () { + function SimpleQueue() { + this._cursor = 0; + this._size = 0; + // _front and _back are always defined. + this._front = { + _elements: [], + _next: undefined + }; + this._back = this._front; + // The cursor is used to avoid calling Array.shift(). + // It contains the index of the front element of the array inside the + // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE). + this._cursor = 0; + // When there is only one node, size === elements.length - cursor. + this._size = 0; + } + Object.defineProperty(SimpleQueue.prototype, "length", { + get: function () { + return this._size; + }, + enumerable: false, + configurable: true + }); + // For exception safety, this method is structured in order: + // 1. Read state + // 2. Calculate required state mutations + // 3. Perform state mutations + SimpleQueue.prototype.push = function (element) { + var oldBack = this._back; + var newBack = oldBack; + if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) { + newBack = { + _elements: [], + _next: undefined + }; + } + // push() is the mutation most likely to throw an exception, so it + // goes first. + oldBack._elements.push(element); + if (newBack !== oldBack) { + this._back = newBack; + oldBack._next = newBack; + } + ++this._size; + }; + // Like push(), shift() follows the read -> calculate -> mutate pattern for + // exception safety. + SimpleQueue.prototype.shift = function () { // must not be called on an empty queue + var oldFront = this._front; + var newFront = oldFront; + var oldCursor = this._cursor; + var newCursor = oldCursor + 1; + var elements = oldFront._elements; + var element = elements[oldCursor]; + if (newCursor === QUEUE_MAX_ARRAY_SIZE) { + newFront = oldFront._next; + newCursor = 0; + } + // No mutations before this point. + --this._size; + this._cursor = newCursor; + if (oldFront !== newFront) { + this._front = newFront; + } + // Permit shifted element to be garbage collected. + elements[oldCursor] = undefined; + return element; + }; + // The tricky thing about forEach() is that it can be called + // re-entrantly. The queue may be mutated inside the callback. It is easy to + // see that push() within the callback has no negative effects since the end + // of the queue is checked for on every iteration. If shift() is called + // repeatedly within the callback then the next iteration may return an + // element that has been removed. In this case the callback will be called + // with undefined values until we either "catch up" with elements that still + // exist or reach the back of the queue. + SimpleQueue.prototype.forEach = function (callback) { + var i = this._cursor; + var node = this._front; + var elements = node._elements; + while (i !== elements.length || node._next !== undefined) { + if (i === elements.length) { + node = node._next; + elements = node._elements; + i = 0; + if (elements.length === 0) { + break; + } + } + callback(elements[i]); + ++i; + } + }; + // Return the element that would be returned if shift() was called now, + // without modifying the queue. + SimpleQueue.prototype.peek = function () { // must not be called on an empty queue + var front = this._front; + var cursor = this._cursor; + return front._elements[cursor]; + }; + return SimpleQueue; + }()); + + var AbortSteps = SymbolPolyfill('[[AbortSteps]]'); + var ErrorSteps = SymbolPolyfill('[[ErrorSteps]]'); + var CancelSteps = SymbolPolyfill('[[CancelSteps]]'); + var PullSteps = SymbolPolyfill('[[PullSteps]]'); + var ReleaseSteps = SymbolPolyfill('[[ReleaseSteps]]'); + + function ReadableStreamReaderGenericInitialize(reader, stream) { + reader._ownerReadableStream = stream; + stream._reader = reader; + if (stream._state === 'readable') { + defaultReaderClosedPromiseInitialize(reader); + } + else if (stream._state === 'closed') { + defaultReaderClosedPromiseInitializeAsResolved(reader); + } + else { + defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError); + } + } + // A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state + // check. + function ReadableStreamReaderGenericCancel(reader, reason) { + var stream = reader._ownerReadableStream; + return ReadableStreamCancel(stream, reason); + } + function ReadableStreamReaderGenericRelease(reader) { + var stream = reader._ownerReadableStream; + if (stream._state === 'readable') { + defaultReaderClosedPromiseReject(reader, new TypeError("Reader was released and can no longer be used to monitor the stream's closedness")); + } + else { + defaultReaderClosedPromiseResetToRejected(reader, new TypeError("Reader was released and can no longer be used to monitor the stream's closedness")); + } + stream._readableStreamController[ReleaseSteps](); + stream._reader = undefined; + reader._ownerReadableStream = undefined; + } + // Helper functions for the readers. + function readerLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released reader'); + } + // Helper functions for the ReadableStreamDefaultReader. + function defaultReaderClosedPromiseInitialize(reader) { + reader._closedPromise = newPromise(function (resolve, reject) { + reader._closedPromise_resolve = resolve; + reader._closedPromise_reject = reject; + }); + } + function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseReject(reader, reason); + } + function defaultReaderClosedPromiseInitializeAsResolved(reader) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseResolve(reader); + } + function defaultReaderClosedPromiseReject(reader, reason) { + if (reader._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(reader._closedPromise); + reader._closedPromise_reject(reason); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; + } + function defaultReaderClosedPromiseResetToRejected(reader, reason) { + defaultReaderClosedPromiseInitializeAsRejected(reader, reason); + } + function defaultReaderClosedPromiseResolve(reader) { + if (reader._closedPromise_resolve === undefined) { + return; + } + reader._closedPromise_resolve(undefined); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; + } + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill + var NumberIsFinite = Number.isFinite || function (x) { + return typeof x === 'number' && isFinite(x); + }; + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill + var MathTrunc = Math.trunc || function (v) { + return v < 0 ? Math.ceil(v) : Math.floor(v); + }; + + // https://heycam.github.io/webidl/#idl-dictionaries + function isDictionary(x) { + return typeof x === 'object' || typeof x === 'function'; + } + function assertDictionary(obj, context) { + if (obj !== undefined && !isDictionary(obj)) { + throw new TypeError("".concat(context, " is not an object.")); + } + } + // https://heycam.github.io/webidl/#idl-callback-functions + function assertFunction(x, context) { + if (typeof x !== 'function') { + throw new TypeError("".concat(context, " is not a function.")); + } + } + // https://heycam.github.io/webidl/#idl-object + function isObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; + } + function assertObject(x, context) { + if (!isObject(x)) { + throw new TypeError("".concat(context, " is not an object.")); + } + } + function assertRequiredArgument(x, position, context) { + if (x === undefined) { + throw new TypeError("Parameter ".concat(position, " is required in '").concat(context, "'.")); + } + } + function assertRequiredField(x, field, context) { + if (x === undefined) { + throw new TypeError("".concat(field, " is required in '").concat(context, "'.")); + } + } + // https://heycam.github.io/webidl/#idl-unrestricted-double + function convertUnrestrictedDouble(value) { + return Number(value); + } + function censorNegativeZero(x) { + return x === 0 ? 0 : x; + } + function integerPart(x) { + return censorNegativeZero(MathTrunc(x)); + } + // https://heycam.github.io/webidl/#idl-unsigned-long-long + function convertUnsignedLongLongWithEnforceRange(value, context) { + var lowerBound = 0; + var upperBound = Number.MAX_SAFE_INTEGER; + var x = Number(value); + x = censorNegativeZero(x); + if (!NumberIsFinite(x)) { + throw new TypeError("".concat(context, " is not a finite number")); + } + x = integerPart(x); + if (x < lowerBound || x > upperBound) { + throw new TypeError("".concat(context, " is outside the accepted range of ").concat(lowerBound, " to ").concat(upperBound, ", inclusive")); + } + if (!NumberIsFinite(x) || x === 0) { + return 0; + } + // TODO Use BigInt if supported? + // let xBigInt = BigInt(integerPart(x)); + // xBigInt = BigInt.asUintN(64, xBigInt); + // return Number(xBigInt); + return x; + } + + function assertReadableStream(x, context) { + if (!IsReadableStream(x)) { + throw new TypeError("".concat(context, " is not a ReadableStream.")); + } + } + + // Abstract operations for the ReadableStream. + function AcquireReadableStreamDefaultReader(stream) { + return new ReadableStreamDefaultReader(stream); + } + // ReadableStream API exposed for controllers. + function ReadableStreamAddReadRequest(stream, readRequest) { + stream._reader._readRequests.push(readRequest); + } + function ReadableStreamFulfillReadRequest(stream, chunk, done) { + var reader = stream._reader; + var readRequest = reader._readRequests.shift(); + if (done) { + readRequest._closeSteps(); + } + else { + readRequest._chunkSteps(chunk); + } + } + function ReadableStreamGetNumReadRequests(stream) { + return stream._reader._readRequests.length; + } + function ReadableStreamHasDefaultReader(stream) { + var reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamDefaultReader(reader)) { + return false; + } + return true; + } + /** + * A default reader vended by a {@link ReadableStream}. + * + * @public + */ + var ReadableStreamDefaultReader = /** @class */ (function () { + function ReadableStreamDefaultReader(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readRequests = new SimpleQueue(); + } + Object.defineProperty(ReadableStreamDefaultReader.prototype, "closed", { + /** + * Returns a promise that will be fulfilled when the stream becomes closed, + * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing. + */ + get: function () { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('closed')); + } + return this._closedPromise; + }, + enumerable: false, + configurable: true + }); + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + ReadableStreamDefaultReader.prototype.cancel = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + }; + /** + * Returns a promise that allows access to the next chunk from the stream's internal queue, if available. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + ReadableStreamDefaultReader.prototype.read = function () { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('read')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + var resolvePromise; + var rejectPromise; + var promise = newPromise(function (resolve, reject) { + resolvePromise = resolve; + rejectPromise = reject; + }); + var readRequest = { + _chunkSteps: function (chunk) { return resolvePromise({ value: chunk, done: false }); }, + _closeSteps: function () { return resolvePromise({ value: undefined, done: true }); }, + _errorSteps: function (e) { return rejectPromise(e); } + }; + ReadableStreamDefaultReaderRead(this, readRequest); + return promise; + }; + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + ReadableStreamDefaultReader.prototype.releaseLock = function () { + if (!IsReadableStreamDefaultReader(this)) { + throw defaultReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamDefaultReaderRelease(this); + }; + return ReadableStreamDefaultReader; + }()); + Object.defineProperties(ReadableStreamDefaultReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } + }); + setFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel'); + setFunctionName(ReadableStreamDefaultReader.prototype.read, 'read'); + setFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultReader.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamDefaultReader', + configurable: true + }); + } + // Abstract operations for the readers. + function IsReadableStreamDefaultReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) { + return false; + } + return x instanceof ReadableStreamDefaultReader; + } + function ReadableStreamDefaultReaderRead(reader, readRequest) { + var stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'closed') { + readRequest._closeSteps(); + } + else if (stream._state === 'errored') { + readRequest._errorSteps(stream._storedError); + } + else { + stream._readableStreamController[PullSteps](readRequest); + } + } + function ReadableStreamDefaultReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + var e = new TypeError('Reader was released'); + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + function ReadableStreamDefaultReaderErrorReadRequests(reader, e) { + var readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(function (readRequest) { + readRequest._errorSteps(e); + }); + } + // Helper functions for the ReadableStreamDefaultReader. + function defaultReaderBrandCheckException(name) { + return new TypeError("ReadableStreamDefaultReader.prototype.".concat(name, " can only be used on a ReadableStreamDefaultReader")); + } + + var _a$1, _b, _c; + function CreateArrayFromList(elements) { + // We use arrays to represent lists, so this is basically a no-op. + // Do a slice though just in case we happen to depend on the unique-ness. + return elements.slice(); + } + function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) { + new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset); + } + var TransferArrayBuffer = function (O) { + if (typeof O.transfer === 'function') { + TransferArrayBuffer = function (buffer) { return buffer.transfer(); }; + } + else if (typeof structuredClone === 'function') { + TransferArrayBuffer = function (buffer) { return structuredClone(buffer, { transfer: [buffer] }); }; + } + else { + // Not implemented correctly + TransferArrayBuffer = function (buffer) { return buffer; }; + } + return TransferArrayBuffer(O); + }; + var IsDetachedBuffer = function (O) { + if (typeof O.detached === 'boolean') { + IsDetachedBuffer = function (buffer) { return buffer.detached; }; + } + else { + // Not implemented correctly + IsDetachedBuffer = function (buffer) { return buffer.byteLength === 0; }; + } + return IsDetachedBuffer(O); + }; + function ArrayBufferSlice(buffer, begin, end) { + // ArrayBuffer.prototype.slice is not available on IE10 + // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice + if (buffer.slice) { + return buffer.slice(begin, end); + } + var length = end - begin; + var slice = new ArrayBuffer(length); + CopyDataBlockBytes(slice, 0, buffer, begin, length); + return slice; + } + function GetMethod(receiver, prop) { + var func = receiver[prop]; + if (func === undefined || func === null) { + return undefined; + } + if (typeof func !== 'function') { + throw new TypeError("".concat(String(prop), " is not a function")); + } + return func; + } + function CreateAsyncFromSyncIterator(syncIteratorRecord) { + // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%, + // we use yield* inside an async generator function to achieve the same result. + var _a; + // Wrap the sync iterator inside a sync iterable, so we can use it with yield*. + var syncIterable = (_a = {}, + _a[SymbolPolyfill.iterator] = function () { return syncIteratorRecord.iterator; }, + _a); + // Create an async generator function and immediately invoke it. + var asyncIterator = (function () { + return __asyncGenerator(this, arguments, function () { + return __generator(this, function (_a) { + switch (_a.label) { + case 0: return [5 /*yield**/, __values(__asyncDelegator(__asyncValues(syncIterable)))]; + case 1: return [4 /*yield*/, __await.apply(void 0, [_a.sent()])]; + case 2: return [4 /*yield*/, __await.apply(void 0, [_a.sent()])]; + case 3: return [2 /*return*/, _a.sent()]; + } + }); + }); + }()); + // Return as an async iterator record. + var nextMethod = asyncIterator.next; + return { iterator: asyncIterator, nextMethod: nextMethod, done: false }; + } + // Aligns with core-js/modules/es.symbol.async-iterator.js + var SymbolAsyncIterator = (_c = (_a$1 = SymbolPolyfill.asyncIterator) !== null && _a$1 !== void 0 ? _a$1 : (_b = SymbolPolyfill.for) === null || _b === void 0 ? void 0 : _b.call(SymbolPolyfill, 'Symbol.asyncIterator')) !== null && _c !== void 0 ? _c : '@@asyncIterator'; + function GetIterator(obj, hint, method) { + if (hint === void 0) { hint = 'sync'; } + if (method === undefined) { + if (hint === 'async') { + method = GetMethod(obj, SymbolAsyncIterator); + if (method === undefined) { + var syncMethod = GetMethod(obj, SymbolPolyfill.iterator); + var syncIteratorRecord = GetIterator(obj, 'sync', syncMethod); + return CreateAsyncFromSyncIterator(syncIteratorRecord); + } + } + else { + method = GetMethod(obj, SymbolPolyfill.iterator); + } + } + if (method === undefined) { + throw new TypeError('The object is not iterable'); + } + var iterator = reflectCall(method, obj, []); + if (!typeIsObject(iterator)) { + throw new TypeError('The iterator method must return an object'); + } + var nextMethod = iterator.next; + return { iterator: iterator, nextMethod: nextMethod, done: false }; + } + function IteratorNext(iteratorRecord) { + var result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []); + if (!typeIsObject(result)) { + throw new TypeError('The iterator.next() method must return an object'); + } + return result; + } + function IteratorComplete(iterResult) { + return Boolean(iterResult.done); + } + function IteratorValue(iterResult) { + return iterResult.value; + } + + /// + var _a; + // We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it. + var AsyncIteratorPrototype = (_a = {}, + // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( ) + // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator + _a[SymbolAsyncIterator] = function () { + return this; + }, + _a); + Object.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false }); + + /// + var ReadableStreamAsyncIteratorImpl = /** @class */ (function () { + function ReadableStreamAsyncIteratorImpl(reader, preventCancel) { + this._ongoingPromise = undefined; + this._isFinished = false; + this._reader = reader; + this._preventCancel = preventCancel; + } + ReadableStreamAsyncIteratorImpl.prototype.next = function () { + var _this = this; + var nextSteps = function () { return _this._nextSteps(); }; + this._ongoingPromise = this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) : + nextSteps(); + return this._ongoingPromise; + }; + ReadableStreamAsyncIteratorImpl.prototype.return = function (value) { + var _this = this; + var returnSteps = function () { return _this._returnSteps(value); }; + return this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) : + returnSteps(); + }; + ReadableStreamAsyncIteratorImpl.prototype._nextSteps = function () { + var _this = this; + if (this._isFinished) { + return Promise.resolve({ value: undefined, done: true }); + } + var reader = this._reader; + var resolvePromise; + var rejectPromise; + var promise = newPromise(function (resolve, reject) { + resolvePromise = resolve; + rejectPromise = reject; + }); + var readRequest = { + _chunkSteps: function (chunk) { + _this._ongoingPromise = undefined; + // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test. + // FIXME Is this a bug in the specification, or in the test? + _queueMicrotask(function () { return resolvePromise({ value: chunk, done: false }); }); + }, + _closeSteps: function () { + _this._ongoingPromise = undefined; + _this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + resolvePromise({ value: undefined, done: true }); + }, + _errorSteps: function (reason) { + _this._ongoingPromise = undefined; + _this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + rejectPromise(reason); + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promise; + }; + ReadableStreamAsyncIteratorImpl.prototype._returnSteps = function (value) { + if (this._isFinished) { + return Promise.resolve({ value: value, done: true }); + } + this._isFinished = true; + var reader = this._reader; + if (!this._preventCancel) { + var result = ReadableStreamReaderGenericCancel(reader, value); + ReadableStreamReaderGenericRelease(reader); + return transformPromiseWith(result, function () { return ({ value: value, done: true }); }); + } + ReadableStreamReaderGenericRelease(reader); + return promiseResolvedWith({ value: value, done: true }); + }; + return ReadableStreamAsyncIteratorImpl; + }()); + var ReadableStreamAsyncIteratorPrototype = { + next: function () { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next')); + } + return this._asyncIteratorImpl.next(); + }, + return: function (value) { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return')); + } + return this._asyncIteratorImpl.return(value); + } + }; + Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype); + // Abstract operations for the ReadableStream. + function AcquireReadableStreamAsyncIterator(stream, preventCancel) { + var reader = AcquireReadableStreamDefaultReader(stream); + var impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel); + var iterator = Object.create(ReadableStreamAsyncIteratorPrototype); + iterator._asyncIteratorImpl = impl; + return iterator; + } + function IsReadableStreamAsyncIterator(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) { + return false; + } + try { + // noinspection SuspiciousTypeOfGuard + return x._asyncIteratorImpl instanceof + ReadableStreamAsyncIteratorImpl; + } + catch (_a) { + return false; + } + } + // Helper functions for the ReadableStream. + function streamAsyncIteratorBrandCheckException(name) { + return new TypeError("ReadableStreamAsyncIterator.".concat(name, " can only be used on a ReadableSteamAsyncIterator")); + } + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill + var NumberIsNaN = Number.isNaN || function (x) { + // eslint-disable-next-line no-self-compare + return x !== x; + }; + + function IsNonNegativeNumber(v) { + if (typeof v !== 'number') { + return false; + } + if (NumberIsNaN(v)) { + return false; + } + if (v < 0) { + return false; + } + return true; + } + function CloneAsUint8Array(O) { + var buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength); + return new Uint8Array(buffer); + } + + function DequeueValue(container) { + var pair = container._queue.shift(); + container._queueTotalSize -= pair.size; + if (container._queueTotalSize < 0) { + container._queueTotalSize = 0; + } + return pair.value; + } + function EnqueueValueWithSize(container, value, size) { + if (!IsNonNegativeNumber(size) || size === Infinity) { + throw new RangeError('Size must be a finite, non-NaN, non-negative number.'); + } + container._queue.push({ value: value, size: size }); + container._queueTotalSize += size; + } + function PeekQueueValue(container) { + var pair = container._queue.peek(); + return pair.value; + } + function ResetQueue(container) { + container._queue = new SimpleQueue(); + container._queueTotalSize = 0; + } + + function isDataViewConstructor(ctor) { + return ctor === DataView; + } + function isDataView(view) { + return isDataViewConstructor(view.constructor); + } + function arrayBufferViewElementSize(ctor) { + if (isDataViewConstructor(ctor)) { + return 1; + } + return ctor.BYTES_PER_ELEMENT; + } + + /** + * A pull-into request in a {@link ReadableByteStreamController}. + * + * @public + */ + var ReadableStreamBYOBRequest = /** @class */ (function () { + function ReadableStreamBYOBRequest() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(ReadableStreamBYOBRequest.prototype, "view", { + /** + * Returns the view for writing in to, or `null` if the BYOB request has already been responded to. + */ + get: function () { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('view'); + } + return this._view; + }, + enumerable: false, + configurable: true + }); + ReadableStreamBYOBRequest.prototype.respond = function (bytesWritten) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respond'); + } + assertRequiredArgument(bytesWritten, 1, 'respond'); + bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter'); + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(this._view.buffer)) { + throw new TypeError("The BYOB request's buffer has been detached and so cannot be used as a response"); + } + ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten); + }; + ReadableStreamBYOBRequest.prototype.respondWithNewView = function (view) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respondWithNewView'); + } + assertRequiredArgument(view, 1, 'respondWithNewView'); + if (!ArrayBuffer.isView(view)) { + throw new TypeError('You can only respond with array buffer views'); + } + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(view.buffer)) { + throw new TypeError('The given view\'s buffer has been detached and so cannot be used as a response'); + } + ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view); + }; + return ReadableStreamBYOBRequest; + }()); + Object.defineProperties(ReadableStreamBYOBRequest.prototype, { + respond: { enumerable: true }, + respondWithNewView: { enumerable: true }, + view: { enumerable: true } + }); + setFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond'); + setFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBRequest.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamBYOBRequest', + configurable: true + }); + } + /** + * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue. + * + * @public + */ + var ReadableByteStreamController = /** @class */ (function () { + function ReadableByteStreamController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(ReadableByteStreamController.prototype, "byobRequest", { + /** + * Returns the current BYOB pull request, or `null` if there isn't one. + */ + get: function () { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('byobRequest'); + } + return ReadableByteStreamControllerGetBYOBRequest(this); + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(ReadableByteStreamController.prototype, "desiredSize", { + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure. + */ + get: function () { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('desiredSize'); + } + return ReadableByteStreamControllerGetDesiredSize(this); + }, + enumerable: false, + configurable: true + }); + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + ReadableByteStreamController.prototype.close = function () { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('close'); + } + if (this._closeRequested) { + throw new TypeError('The stream has already been closed; do not close it again!'); + } + var state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError("The stream (in ".concat(state, " state) is not in the readable state and cannot be closed")); + } + ReadableByteStreamControllerClose(this); + }; + ReadableByteStreamController.prototype.enqueue = function (chunk) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('enqueue'); + } + assertRequiredArgument(chunk, 1, 'enqueue'); + if (!ArrayBuffer.isView(chunk)) { + throw new TypeError('chunk must be an array buffer view'); + } + if (chunk.byteLength === 0) { + throw new TypeError('chunk must have non-zero byteLength'); + } + if (chunk.buffer.byteLength === 0) { + throw new TypeError("chunk's buffer must have non-zero byteLength"); + } + if (this._closeRequested) { + throw new TypeError('stream is closed or draining'); + } + var state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError("The stream (in ".concat(state, " state) is not in the readable state and cannot be enqueued to")); + } + ReadableByteStreamControllerEnqueue(this, chunk); + }; + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + ReadableByteStreamController.prototype.error = function (e) { + if (e === void 0) { e = undefined; } + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('error'); + } + ReadableByteStreamControllerError(this, e); + }; + /** @internal */ + ReadableByteStreamController.prototype[CancelSteps] = function (reason) { + ReadableByteStreamControllerClearPendingPullIntos(this); + ResetQueue(this); + var result = this._cancelAlgorithm(reason); + ReadableByteStreamControllerClearAlgorithms(this); + return result; + }; + /** @internal */ + ReadableByteStreamController.prototype[PullSteps] = function (readRequest) { + var stream = this._controlledReadableByteStream; + if (this._queueTotalSize > 0) { + ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest); + return; + } + var autoAllocateChunkSize = this._autoAllocateChunkSize; + if (autoAllocateChunkSize !== undefined) { + var buffer = void 0; + try { + buffer = new ArrayBuffer(autoAllocateChunkSize); + } + catch (bufferE) { + readRequest._errorSteps(bufferE); + return; + } + var pullIntoDescriptor = { + buffer: buffer, + bufferByteLength: autoAllocateChunkSize, + byteOffset: 0, + byteLength: autoAllocateChunkSize, + bytesFilled: 0, + minimumFill: 1, + elementSize: 1, + viewConstructor: Uint8Array, + readerType: 'default' + }; + this._pendingPullIntos.push(pullIntoDescriptor); + } + ReadableStreamAddReadRequest(stream, readRequest); + ReadableByteStreamControllerCallPullIfNeeded(this); + }; + /** @internal */ + ReadableByteStreamController.prototype[ReleaseSteps] = function () { + if (this._pendingPullIntos.length > 0) { + var firstPullInto = this._pendingPullIntos.peek(); + firstPullInto.readerType = 'none'; + this._pendingPullIntos = new SimpleQueue(); + this._pendingPullIntos.push(firstPullInto); + } + }; + return ReadableByteStreamController; + }()); + Object.defineProperties(ReadableByteStreamController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + byobRequest: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(ReadableByteStreamController.prototype.close, 'close'); + setFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue'); + setFunctionName(ReadableByteStreamController.prototype.error, 'error'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableByteStreamController.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableByteStreamController', + configurable: true + }); + } + // Abstract operations for the ReadableByteStreamController. + function IsReadableByteStreamController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) { + return false; + } + return x instanceof ReadableByteStreamController; + } + function IsReadableStreamBYOBRequest(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) { + return false; + } + return x instanceof ReadableStreamBYOBRequest; + } + function ReadableByteStreamControllerCallPullIfNeeded(controller) { + var shouldPull = ReadableByteStreamControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + // TODO: Test controller argument + var pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, function () { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + return null; + }, function (e) { + ReadableByteStreamControllerError(controller, e); + return null; + }); + } + function ReadableByteStreamControllerClearPendingPullIntos(controller) { + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + controller._pendingPullIntos = new SimpleQueue(); + } + function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) { + var done = false; + if (stream._state === 'closed') { + done = true; + } + var filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'default') { + ReadableStreamFulfillReadRequest(stream, filledView, done); + } + else { + ReadableStreamFulfillReadIntoRequest(stream, filledView, done); + } + } + function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) { + var bytesFilled = pullIntoDescriptor.bytesFilled; + var elementSize = pullIntoDescriptor.elementSize; + return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize); + } + function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) { + controller._queue.push({ buffer: buffer, byteOffset: byteOffset, byteLength: byteLength }); + controller._queueTotalSize += byteLength; + } + function ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, buffer, byteOffset, byteLength) { + var clonedChunk; + try { + clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength); + } + catch (cloneE) { + ReadableByteStreamControllerError(controller, cloneE); + throw cloneE; + } + ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength); + } + function ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstDescriptor) { + if (firstDescriptor.bytesFilled > 0) { + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, firstDescriptor.buffer, firstDescriptor.byteOffset, firstDescriptor.bytesFilled); + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) { + var maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled); + var maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy; + var totalBytesToCopyRemaining = maxBytesToCopy; + var ready = false; + var remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize; + var maxAlignedBytes = maxBytesFilled - remainderBytes; + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) { + totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled; + ready = true; + } + var queue = controller._queue; + while (totalBytesToCopyRemaining > 0) { + var headOfQueue = queue.peek(); + var bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength); + var destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy); + if (headOfQueue.byteLength === bytesToCopy) { + queue.shift(); + } + else { + headOfQueue.byteOffset += bytesToCopy; + headOfQueue.byteLength -= bytesToCopy; + } + controller._queueTotalSize -= bytesToCopy; + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor); + totalBytesToCopyRemaining -= bytesToCopy; + } + return ready; + } + function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) { + pullIntoDescriptor.bytesFilled += size; + } + function ReadableByteStreamControllerHandleQueueDrain(controller) { + if (controller._queueTotalSize === 0 && controller._closeRequested) { + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(controller._controlledReadableByteStream); + } + else { + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + } + function ReadableByteStreamControllerInvalidateBYOBRequest(controller) { + if (controller._byobRequest === null) { + return; + } + controller._byobRequest._associatedReadableByteStreamController = undefined; + controller._byobRequest._view = null; + controller._byobRequest = null; + } + function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) { + while (controller._pendingPullIntos.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + var pullIntoDescriptor = controller._pendingPullIntos.peek(); + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + } + } + } + function ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller) { + var reader = controller._controlledReadableByteStream._reader; + while (reader._readRequests.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + var readRequest = reader._readRequests.shift(); + ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest); + } + } + function ReadableByteStreamControllerPullInto(controller, view, min, readIntoRequest) { + var stream = controller._controlledReadableByteStream; + var ctor = view.constructor; + var elementSize = arrayBufferViewElementSize(ctor); + var byteOffset = view.byteOffset, byteLength = view.byteLength; + var minimumFill = min * elementSize; + var buffer; + try { + buffer = TransferArrayBuffer(view.buffer); + } + catch (e) { + readIntoRequest._errorSteps(e); + return; + } + var pullIntoDescriptor = { + buffer: buffer, + bufferByteLength: buffer.byteLength, + byteOffset: byteOffset, + byteLength: byteLength, + bytesFilled: 0, + minimumFill: minimumFill, + elementSize: elementSize, + viewConstructor: ctor, + readerType: 'byob' + }; + if (controller._pendingPullIntos.length > 0) { + controller._pendingPullIntos.push(pullIntoDescriptor); + // No ReadableByteStreamControllerCallPullIfNeeded() call since: + // - No change happens on desiredSize + // - The source has already been notified of that there's at least 1 pending read(view) + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + return; + } + if (stream._state === 'closed') { + var emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0); + readIntoRequest._closeSteps(emptyView); + return; + } + if (controller._queueTotalSize > 0) { + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + var filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + ReadableByteStreamControllerHandleQueueDrain(controller); + readIntoRequest._chunkSteps(filledView); + return; + } + if (controller._closeRequested) { + var e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + readIntoRequest._errorSteps(e); + return; + } + } + controller._pendingPullIntos.push(pullIntoDescriptor); + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) { + if (firstDescriptor.readerType === 'none') { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + var stream = controller._controlledReadableByteStream; + if (ReadableStreamHasBYOBReader(stream)) { + while (ReadableStreamGetNumReadIntoRequests(stream) > 0) { + var pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor); + } + } + } + function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) { + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + return; + } + if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) { + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + return; + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + var remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize; + if (remainderSize > 0) { + var end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, pullIntoDescriptor.buffer, end - remainderSize, remainderSize); + } + pullIntoDescriptor.bytesFilled -= remainderSize; + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) { + var firstDescriptor = controller._pendingPullIntos.peek(); + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + var state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor); + } + else { + ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerShiftPendingPullInto(controller) { + var descriptor = controller._pendingPullIntos.shift(); + return descriptor; + } + function ReadableByteStreamControllerShouldCallPull(controller) { + var stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return false; + } + if (controller._closeRequested) { + return false; + } + if (!controller._started) { + return false; + } + if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) { + return true; + } + var desiredSize = ReadableByteStreamControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; + } + function ReadableByteStreamControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + } + // A client of ReadableByteStreamController may use these functions directly to bypass state check. + function ReadableByteStreamControllerClose(controller) { + var stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + if (controller._queueTotalSize > 0) { + controller._closeRequested = true; + return; + } + if (controller._pendingPullIntos.length > 0) { + var firstPendingPullInto = controller._pendingPullIntos.peek(); + if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) { + var e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + throw e; + } + } + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } + function ReadableByteStreamControllerEnqueue(controller, chunk) { + var stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + var buffer = chunk.buffer, byteOffset = chunk.byteOffset, byteLength = chunk.byteLength; + if (IsDetachedBuffer(buffer)) { + throw new TypeError('chunk\'s buffer is detached and so cannot be enqueued'); + } + var transferredBuffer = TransferArrayBuffer(buffer); + if (controller._pendingPullIntos.length > 0) { + var firstPendingPullInto = controller._pendingPullIntos.peek(); + if (IsDetachedBuffer(firstPendingPullInto.buffer)) { + throw new TypeError('The BYOB request\'s buffer has been detached and so cannot be filled with an enqueued chunk'); + } + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer); + if (firstPendingPullInto.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto); + } + } + if (ReadableStreamHasDefaultReader(stream)) { + ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller); + if (ReadableStreamGetNumReadRequests(stream) === 0) { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + else { + if (controller._pendingPullIntos.length > 0) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + var transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength); + ReadableStreamFulfillReadRequest(stream, transferredView, false); + } + } + else if (ReadableStreamHasBYOBReader(stream)) { + // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully. + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + else { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerError(controller, e) { + var stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return; + } + ReadableByteStreamControllerClearPendingPullIntos(controller); + ResetQueue(controller); + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); + } + function ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest) { + var entry = controller._queue.shift(); + controller._queueTotalSize -= entry.byteLength; + ReadableByteStreamControllerHandleQueueDrain(controller); + var view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength); + readRequest._chunkSteps(view); + } + function ReadableByteStreamControllerGetBYOBRequest(controller) { + if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) { + var firstDescriptor = controller._pendingPullIntos.peek(); + var view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled); + var byobRequest = Object.create(ReadableStreamBYOBRequest.prototype); + SetUpReadableStreamBYOBRequest(byobRequest, controller, view); + controller._byobRequest = byobRequest; + } + return controller._byobRequest; + } + function ReadableByteStreamControllerGetDesiredSize(controller) { + var state = controller._controlledReadableByteStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; + } + function ReadableByteStreamControllerRespond(controller, bytesWritten) { + var firstDescriptor = controller._pendingPullIntos.peek(); + var state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (bytesWritten !== 0) { + throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream'); + } + } + else { + if (bytesWritten === 0) { + throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream'); + } + if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) { + throw new RangeError('bytesWritten out of range'); + } + } + firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer); + ReadableByteStreamControllerRespondInternal(controller, bytesWritten); + } + function ReadableByteStreamControllerRespondWithNewView(controller, view) { + var firstDescriptor = controller._pendingPullIntos.peek(); + var state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (view.byteLength !== 0) { + throw new TypeError('The view\'s length must be 0 when calling respondWithNewView() on a closed stream'); + } + } + else { + if (view.byteLength === 0) { + throw new TypeError('The view\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'); + } + } + if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) { + throw new RangeError('The region specified by view does not match byobRequest'); + } + if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) { + throw new RangeError('The buffer of view has different capacity than byobRequest'); + } + if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) { + throw new RangeError('The region specified by view is larger than byobRequest'); + } + var viewByteLength = view.byteLength; + firstDescriptor.buffer = TransferArrayBuffer(view.buffer); + ReadableByteStreamControllerRespondInternal(controller, viewByteLength); + } + function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) { + controller._controlledReadableByteStream = stream; + controller._pullAgain = false; + controller._pulling = false; + controller._byobRequest = null; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._closeRequested = false; + controller._started = false; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._autoAllocateChunkSize = autoAllocateChunkSize; + controller._pendingPullIntos = new SimpleQueue(); + stream._readableStreamController = controller; + var startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), function () { + controller._started = true; + ReadableByteStreamControllerCallPullIfNeeded(controller); + return null; + }, function (r) { + ReadableByteStreamControllerError(controller, r); + return null; + }); + } + function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) { + var controller = Object.create(ReadableByteStreamController.prototype); + var startAlgorithm; + var pullAlgorithm; + var cancelAlgorithm; + if (underlyingByteSource.start !== undefined) { + startAlgorithm = function () { return underlyingByteSource.start(controller); }; + } + else { + startAlgorithm = function () { return undefined; }; + } + if (underlyingByteSource.pull !== undefined) { + pullAlgorithm = function () { return underlyingByteSource.pull(controller); }; + } + else { + pullAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingByteSource.cancel !== undefined) { + cancelAlgorithm = function (reason) { return underlyingByteSource.cancel(reason); }; + } + else { + cancelAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + var autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize; + if (autoAllocateChunkSize === 0) { + throw new TypeError('autoAllocateChunkSize must be greater than 0'); + } + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize); + } + function SetUpReadableStreamBYOBRequest(request, controller, view) { + request._associatedReadableByteStreamController = controller; + request._view = view; + } + // Helper functions for the ReadableStreamBYOBRequest. + function byobRequestBrandCheckException(name) { + return new TypeError("ReadableStreamBYOBRequest.prototype.".concat(name, " can only be used on a ReadableStreamBYOBRequest")); + } + // Helper functions for the ReadableByteStreamController. + function byteStreamControllerBrandCheckException(name) { + return new TypeError("ReadableByteStreamController.prototype.".concat(name, " can only be used on a ReadableByteStreamController")); + } + + function convertReaderOptions(options, context) { + assertDictionary(options, context); + var mode = options === null || options === void 0 ? void 0 : options.mode; + return { + mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, "".concat(context, " has member 'mode' that")) + }; + } + function convertReadableStreamReaderMode(mode, context) { + mode = "".concat(mode); + if (mode !== 'byob') { + throw new TypeError("".concat(context, " '").concat(mode, "' is not a valid enumeration value for ReadableStreamReaderMode")); + } + return mode; + } + function convertByobReadOptions(options, context) { + var _a; + assertDictionary(options, context); + var min = (_a = options === null || options === void 0 ? void 0 : options.min) !== null && _a !== void 0 ? _a : 1; + return { + min: convertUnsignedLongLongWithEnforceRange(min, "".concat(context, " has member 'min' that")) + }; + } + + // Abstract operations for the ReadableStream. + function AcquireReadableStreamBYOBReader(stream) { + return new ReadableStreamBYOBReader(stream); + } + // ReadableStream API exposed for controllers. + function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) { + stream._reader._readIntoRequests.push(readIntoRequest); + } + function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) { + var reader = stream._reader; + var readIntoRequest = reader._readIntoRequests.shift(); + if (done) { + readIntoRequest._closeSteps(chunk); + } + else { + readIntoRequest._chunkSteps(chunk); + } + } + function ReadableStreamGetNumReadIntoRequests(stream) { + return stream._reader._readIntoRequests.length; + } + function ReadableStreamHasBYOBReader(stream) { + var reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamBYOBReader(reader)) { + return false; + } + return true; + } + /** + * A BYOB reader vended by a {@link ReadableStream}. + * + * @public + */ + var ReadableStreamBYOBReader = /** @class */ (function () { + function ReadableStreamBYOBReader(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + if (!IsReadableByteStreamController(stream._readableStreamController)) { + throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' + + 'source'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readIntoRequests = new SimpleQueue(); + } + Object.defineProperty(ReadableStreamBYOBReader.prototype, "closed", { + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the reader's lock is released before the stream finishes closing. + */ + get: function () { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('closed')); + } + return this._closedPromise; + }, + enumerable: false, + configurable: true + }); + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + ReadableStreamBYOBReader.prototype.cancel = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + }; + ReadableStreamBYOBReader.prototype.read = function (view, rawOptions) { + if (rawOptions === void 0) { rawOptions = {}; } + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('read')); + } + if (!ArrayBuffer.isView(view)) { + return promiseRejectedWith(new TypeError('view must be an array buffer view')); + } + if (view.byteLength === 0) { + return promiseRejectedWith(new TypeError('view must have non-zero byteLength')); + } + if (view.buffer.byteLength === 0) { + return promiseRejectedWith(new TypeError("view's buffer must have non-zero byteLength")); + } + if (IsDetachedBuffer(view.buffer)) { + return promiseRejectedWith(new TypeError('view\'s buffer has been detached')); + } + var options; + try { + options = convertByobReadOptions(rawOptions, 'options'); + } + catch (e) { + return promiseRejectedWith(e); + } + var min = options.min; + if (min === 0) { + return promiseRejectedWith(new TypeError('options.min must be greater than 0')); + } + if (!isDataView(view)) { + if (min > view.length) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s length')); + } + } + else if (min > view.byteLength) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s byteLength')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + var resolvePromise; + var rejectPromise; + var promise = newPromise(function (resolve, reject) { + resolvePromise = resolve; + rejectPromise = reject; + }); + var readIntoRequest = { + _chunkSteps: function (chunk) { return resolvePromise({ value: chunk, done: false }); }, + _closeSteps: function (chunk) { return resolvePromise({ value: chunk, done: true }); }, + _errorSteps: function (e) { return rejectPromise(e); } + }; + ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest); + return promise; + }; + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + ReadableStreamBYOBReader.prototype.releaseLock = function () { + if (!IsReadableStreamBYOBReader(this)) { + throw byobReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamBYOBReaderRelease(this); + }; + return ReadableStreamBYOBReader; + }()); + Object.defineProperties(ReadableStreamBYOBReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } + }); + setFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel'); + setFunctionName(ReadableStreamBYOBReader.prototype.read, 'read'); + setFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBReader.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamBYOBReader', + configurable: true + }); + } + // Abstract operations for the readers. + function IsReadableStreamBYOBReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) { + return false; + } + return x instanceof ReadableStreamBYOBReader; + } + function ReadableStreamBYOBReaderRead(reader, view, min, readIntoRequest) { + var stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'errored') { + readIntoRequest._errorSteps(stream._storedError); + } + else { + ReadableByteStreamControllerPullInto(stream._readableStreamController, view, min, readIntoRequest); + } + } + function ReadableStreamBYOBReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + var e = new TypeError('Reader was released'); + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } + function ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e) { + var readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(function (readIntoRequest) { + readIntoRequest._errorSteps(e); + }); + } + // Helper functions for the ReadableStreamBYOBReader. + function byobReaderBrandCheckException(name) { + return new TypeError("ReadableStreamBYOBReader.prototype.".concat(name, " can only be used on a ReadableStreamBYOBReader")); + } + + function ExtractHighWaterMark(strategy, defaultHWM) { + var highWaterMark = strategy.highWaterMark; + if (highWaterMark === undefined) { + return defaultHWM; + } + if (NumberIsNaN(highWaterMark) || highWaterMark < 0) { + throw new RangeError('Invalid highWaterMark'); + } + return highWaterMark; + } + function ExtractSizeAlgorithm(strategy) { + var size = strategy.size; + if (!size) { + return function () { return 1; }; + } + return size; + } + + function convertQueuingStrategy(init, context) { + assertDictionary(init, context); + var highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + var size = init === null || init === void 0 ? void 0 : init.size; + return { + highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark), + size: size === undefined ? undefined : convertQueuingStrategySize(size, "".concat(context, " has member 'size' that")) + }; + } + function convertQueuingStrategySize(fn, context) { + assertFunction(fn, context); + return function (chunk) { return convertUnrestrictedDouble(fn(chunk)); }; + } + + function convertUnderlyingSink(original, context) { + assertDictionary(original, context); + var abort = original === null || original === void 0 ? void 0 : original.abort; + var close = original === null || original === void 0 ? void 0 : original.close; + var start = original === null || original === void 0 ? void 0 : original.start; + var type = original === null || original === void 0 ? void 0 : original.type; + var write = original === null || original === void 0 ? void 0 : original.write; + return { + abort: abort === undefined ? + undefined : + convertUnderlyingSinkAbortCallback(abort, original, "".concat(context, " has member 'abort' that")), + close: close === undefined ? + undefined : + convertUnderlyingSinkCloseCallback(close, original, "".concat(context, " has member 'close' that")), + start: start === undefined ? + undefined : + convertUnderlyingSinkStartCallback(start, original, "".concat(context, " has member 'start' that")), + write: write === undefined ? + undefined : + convertUnderlyingSinkWriteCallback(write, original, "".concat(context, " has member 'write' that")), + type: type + }; + } + function convertUnderlyingSinkAbortCallback(fn, original, context) { + assertFunction(fn, context); + return function (reason) { return promiseCall(fn, original, [reason]); }; + } + function convertUnderlyingSinkCloseCallback(fn, original, context) { + assertFunction(fn, context); + return function () { return promiseCall(fn, original, []); }; + } + function convertUnderlyingSinkStartCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return reflectCall(fn, original, [controller]); }; + } + function convertUnderlyingSinkWriteCallback(fn, original, context) { + assertFunction(fn, context); + return function (chunk, controller) { return promiseCall(fn, original, [chunk, controller]); }; + } + + function assertWritableStream(x, context) { + if (!IsWritableStream(x)) { + throw new TypeError("".concat(context, " is not a WritableStream.")); + } + } + + function isAbortSignal(value) { + if (typeof value !== 'object' || value === null) { + return false; + } + try { + return typeof value.aborted === 'boolean'; + } + catch (_a) { + // AbortSignal.prototype.aborted throws if its brand check fails + return false; + } + } + var supportsAbortController = typeof AbortController === 'function'; + /** + * Construct a new AbortController, if supported by the platform. + * + * @internal + */ + function createAbortController() { + if (supportsAbortController) { + return new AbortController(); + } + return undefined; + } + + /** + * A writable stream represents a destination for data, into which you can write. + * + * @public + */ + var WritableStream = /** @class */ (function () { + function WritableStream(rawUnderlyingSink, rawStrategy) { + if (rawUnderlyingSink === void 0) { rawUnderlyingSink = {}; } + if (rawStrategy === void 0) { rawStrategy = {}; } + if (rawUnderlyingSink === undefined) { + rawUnderlyingSink = null; + } + else { + assertObject(rawUnderlyingSink, 'First parameter'); + } + var strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + var underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter'); + InitializeWritableStream(this); + var type = underlyingSink.type; + if (type !== undefined) { + throw new RangeError('Invalid type is specified'); + } + var sizeAlgorithm = ExtractSizeAlgorithm(strategy); + var highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm); + } + Object.defineProperty(WritableStream.prototype, "locked", { + /** + * Returns whether or not the writable stream is locked to a writer. + */ + get: function () { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('locked'); + } + return IsWritableStreamLocked(this); + }, + enumerable: false, + configurable: true + }); + /** + * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be + * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort + * mechanism of the underlying sink. + * + * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled + * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel + * the stream) if the stream is currently locked. + */ + WritableStream.prototype.abort = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('abort')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer')); + } + return WritableStreamAbort(this, reason); + }; + /** + * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its + * close behavior. During this time any further attempts to write will fail (without erroring the stream). + * + * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream + * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with + * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked. + */ + WritableStream.prototype.close = function () { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('close')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer')); + } + if (WritableStreamCloseQueuedOrInFlight(this)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamClose(this); + }; + /** + * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream + * is locked, no other writer can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to write to a stream + * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at + * the same time, which would cause the resulting written data to be unpredictable and probably useless. + */ + WritableStream.prototype.getWriter = function () { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('getWriter'); + } + return AcquireWritableStreamDefaultWriter(this); + }; + return WritableStream; + }()); + Object.defineProperties(WritableStream.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + getWriter: { enumerable: true }, + locked: { enumerable: true } + }); + setFunctionName(WritableStream.prototype.abort, 'abort'); + setFunctionName(WritableStream.prototype.close, 'close'); + setFunctionName(WritableStream.prototype.getWriter, 'getWriter'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(WritableStream.prototype, SymbolPolyfill.toStringTag, { + value: 'WritableStream', + configurable: true + }); + } + // Abstract operations for the WritableStream. + function AcquireWritableStreamDefaultWriter(stream) { + return new WritableStreamDefaultWriter(stream); + } + // Throws if and only if startAlgorithm throws. + function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + if (highWaterMark === void 0) { highWaterMark = 1; } + if (sizeAlgorithm === void 0) { sizeAlgorithm = function () { return 1; }; } + var stream = Object.create(WritableStream.prototype); + InitializeWritableStream(stream); + var controller = Object.create(WritableStreamDefaultController.prototype); + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + return stream; + } + function InitializeWritableStream(stream) { + stream._state = 'writable'; + // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is + // 'erroring' or 'errored'. May be set to an undefined value. + stream._storedError = undefined; + stream._writer = undefined; + // Initialize to undefined first because the constructor of the controller checks this + // variable to validate the caller. + stream._writableStreamController = undefined; + // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data + // producer without waiting for the queued writes to finish. + stream._writeRequests = new SimpleQueue(); + // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents + // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here. + stream._inFlightWriteRequest = undefined; + // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer + // has been detached. + stream._closeRequest = undefined; + // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it + // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here. + stream._inFlightCloseRequest = undefined; + // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached. + stream._pendingAbortRequest = undefined; + // The backpressure signal set by the controller. + stream._backpressure = false; + } + function IsWritableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) { + return false; + } + return x instanceof WritableStream; + } + function IsWritableStreamLocked(stream) { + if (stream._writer === undefined) { + return false; + } + return true; + } + function WritableStreamAbort(stream, reason) { + var _a; + if (stream._state === 'closed' || stream._state === 'errored') { + return promiseResolvedWith(undefined); + } + stream._writableStreamController._abortReason = reason; + (_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort(reason); + // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring', + // but it doesn't know that signaling abort runs author code that might have changed the state. + // Widen the type again by casting to WritableStreamState. + var state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseResolvedWith(undefined); + } + if (stream._pendingAbortRequest !== undefined) { + return stream._pendingAbortRequest._promise; + } + var wasAlreadyErroring = false; + if (state === 'erroring') { + wasAlreadyErroring = true; + // reason will not be used, so don't keep a reference to it. + reason = undefined; + } + var promise = newPromise(function (resolve, reject) { + stream._pendingAbortRequest = { + _promise: undefined, + _resolve: resolve, + _reject: reject, + _reason: reason, + _wasAlreadyErroring: wasAlreadyErroring + }; + }); + stream._pendingAbortRequest._promise = promise; + if (!wasAlreadyErroring) { + WritableStreamStartErroring(stream, reason); + } + return promise; + } + function WritableStreamClose(stream) { + var state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseRejectedWith(new TypeError("The stream (in ".concat(state, " state) is not in the writable state and cannot be closed"))); + } + var promise = newPromise(function (resolve, reject) { + var closeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._closeRequest = closeRequest; + }); + var writer = stream._writer; + if (writer !== undefined && stream._backpressure && state === 'writable') { + defaultWriterReadyPromiseResolve(writer); + } + WritableStreamDefaultControllerClose(stream._writableStreamController); + return promise; + } + // WritableStream API exposed for controllers. + function WritableStreamAddWriteRequest(stream) { + var promise = newPromise(function (resolve, reject) { + var writeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._writeRequests.push(writeRequest); + }); + return promise; + } + function WritableStreamDealWithRejection(stream, error) { + var state = stream._state; + if (state === 'writable') { + WritableStreamStartErroring(stream, error); + return; + } + WritableStreamFinishErroring(stream); + } + function WritableStreamStartErroring(stream, reason) { + var controller = stream._writableStreamController; + stream._state = 'erroring'; + stream._storedError = reason; + var writer = stream._writer; + if (writer !== undefined) { + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason); + } + if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) { + WritableStreamFinishErroring(stream); + } + } + function WritableStreamFinishErroring(stream) { + stream._state = 'errored'; + stream._writableStreamController[ErrorSteps](); + var storedError = stream._storedError; + stream._writeRequests.forEach(function (writeRequest) { + writeRequest._reject(storedError); + }); + stream._writeRequests = new SimpleQueue(); + if (stream._pendingAbortRequest === undefined) { + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + var abortRequest = stream._pendingAbortRequest; + stream._pendingAbortRequest = undefined; + if (abortRequest._wasAlreadyErroring) { + abortRequest._reject(storedError); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + var promise = stream._writableStreamController[AbortSteps](abortRequest._reason); + uponPromise(promise, function () { + abortRequest._resolve(); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }, function (reason) { + abortRequest._reject(reason); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }); + } + function WritableStreamFinishInFlightWrite(stream) { + stream._inFlightWriteRequest._resolve(undefined); + stream._inFlightWriteRequest = undefined; + } + function WritableStreamFinishInFlightWriteWithError(stream, error) { + stream._inFlightWriteRequest._reject(error); + stream._inFlightWriteRequest = undefined; + WritableStreamDealWithRejection(stream, error); + } + function WritableStreamFinishInFlightClose(stream) { + stream._inFlightCloseRequest._resolve(undefined); + stream._inFlightCloseRequest = undefined; + var state = stream._state; + if (state === 'erroring') { + // The error was too late to do anything, so it is ignored. + stream._storedError = undefined; + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._resolve(); + stream._pendingAbortRequest = undefined; + } + } + stream._state = 'closed'; + var writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseResolve(writer); + } + } + function WritableStreamFinishInFlightCloseWithError(stream, error) { + stream._inFlightCloseRequest._reject(error); + stream._inFlightCloseRequest = undefined; + // Never execute sink abort() after sink close(). + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._reject(error); + stream._pendingAbortRequest = undefined; + } + WritableStreamDealWithRejection(stream, error); + } + // TODO(ricea): Fix alphabetical order. + function WritableStreamCloseQueuedOrInFlight(stream) { + if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; + } + function WritableStreamHasOperationMarkedInFlight(stream) { + if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; + } + function WritableStreamMarkCloseRequestInFlight(stream) { + stream._inFlightCloseRequest = stream._closeRequest; + stream._closeRequest = undefined; + } + function WritableStreamMarkFirstWriteRequestInFlight(stream) { + stream._inFlightWriteRequest = stream._writeRequests.shift(); + } + function WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) { + if (stream._closeRequest !== undefined) { + stream._closeRequest._reject(stream._storedError); + stream._closeRequest = undefined; + } + var writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseReject(writer, stream._storedError); + } + } + function WritableStreamUpdateBackpressure(stream, backpressure) { + var writer = stream._writer; + if (writer !== undefined && backpressure !== stream._backpressure) { + if (backpressure) { + defaultWriterReadyPromiseReset(writer); + } + else { + defaultWriterReadyPromiseResolve(writer); + } + } + stream._backpressure = backpressure; + } + /** + * A default writer vended by a {@link WritableStream}. + * + * @public + */ + var WritableStreamDefaultWriter = /** @class */ (function () { + function WritableStreamDefaultWriter(stream) { + assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter'); + assertWritableStream(stream, 'First parameter'); + if (IsWritableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive writing by another writer'); + } + this._ownerWritableStream = stream; + stream._writer = this; + var state = stream._state; + if (state === 'writable') { + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) { + defaultWriterReadyPromiseInitialize(this); + } + else { + defaultWriterReadyPromiseInitializeAsResolved(this); + } + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'erroring') { + defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError); + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'closed') { + defaultWriterReadyPromiseInitializeAsResolved(this); + defaultWriterClosedPromiseInitializeAsResolved(this); + } + else { + var storedError = stream._storedError; + defaultWriterReadyPromiseInitializeAsRejected(this, storedError); + defaultWriterClosedPromiseInitializeAsRejected(this, storedError); + } + } + Object.defineProperty(WritableStreamDefaultWriter.prototype, "closed", { + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the writer’s lock is released before the stream finishes closing. + */ + get: function () { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('closed')); + } + return this._closedPromise; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(WritableStreamDefaultWriter.prototype, "desiredSize", { + /** + * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full. + * A producer can use this information to determine the right amount of data to write. + * + * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort + * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when + * the writer’s lock is released. + */ + get: function () { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('desiredSize'); + } + if (this._ownerWritableStream === undefined) { + throw defaultWriterLockException('desiredSize'); + } + return WritableStreamDefaultWriterGetDesiredSize(this); + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(WritableStreamDefaultWriter.prototype, "ready", { + /** + * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions + * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips + * back to zero or below, the getter will return a new promise that stays pending until the next transition. + * + * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become + * rejected. + */ + get: function () { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('ready')); + } + return this._readyPromise; + }, + enumerable: false, + configurable: true + }); + /** + * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}. + */ + WritableStreamDefaultWriter.prototype.abort = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('abort')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('abort')); + } + return WritableStreamDefaultWriterAbort(this, reason); + }; + /** + * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}. + */ + WritableStreamDefaultWriter.prototype.close = function () { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('close')); + } + var stream = this._ownerWritableStream; + if (stream === undefined) { + return promiseRejectedWith(defaultWriterLockException('close')); + } + if (WritableStreamCloseQueuedOrInFlight(stream)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamDefaultWriterClose(this); + }; + /** + * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active. + * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from + * now on; otherwise, the writer will appear closed. + * + * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the + * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled). + * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents + * other producers from writing in an interleaved manner. + */ + WritableStreamDefaultWriter.prototype.releaseLock = function () { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('releaseLock'); + } + var stream = this._ownerWritableStream; + if (stream === undefined) { + return; + } + WritableStreamDefaultWriterRelease(this); + }; + WritableStreamDefaultWriter.prototype.write = function (chunk) { + if (chunk === void 0) { chunk = undefined; } + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('write')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + return WritableStreamDefaultWriterWrite(this, chunk); + }; + return WritableStreamDefaultWriter; + }()); + Object.defineProperties(WritableStreamDefaultWriter.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + releaseLock: { enumerable: true }, + write: { enumerable: true }, + closed: { enumerable: true }, + desiredSize: { enumerable: true }, + ready: { enumerable: true } + }); + setFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort'); + setFunctionName(WritableStreamDefaultWriter.prototype.close, 'close'); + setFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock'); + setFunctionName(WritableStreamDefaultWriter.prototype.write, 'write'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultWriter.prototype, SymbolPolyfill.toStringTag, { + value: 'WritableStreamDefaultWriter', + configurable: true + }); + } + // Abstract operations for the WritableStreamDefaultWriter. + function IsWritableStreamDefaultWriter(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultWriter; + } + // A client of WritableStreamDefaultWriter may use these functions directly to bypass state check. + function WritableStreamDefaultWriterAbort(writer, reason) { + var stream = writer._ownerWritableStream; + return WritableStreamAbort(stream, reason); + } + function WritableStreamDefaultWriterClose(writer) { + var stream = writer._ownerWritableStream; + return WritableStreamClose(stream); + } + function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) { + var stream = writer._ownerWritableStream; + var state = stream._state; + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseResolvedWith(undefined); + } + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + return WritableStreamDefaultWriterClose(writer); + } + function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) { + if (writer._closedPromiseState === 'pending') { + defaultWriterClosedPromiseReject(writer, error); + } + else { + defaultWriterClosedPromiseResetToRejected(writer, error); + } + } + function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) { + if (writer._readyPromiseState === 'pending') { + defaultWriterReadyPromiseReject(writer, error); + } + else { + defaultWriterReadyPromiseResetToRejected(writer, error); + } + } + function WritableStreamDefaultWriterGetDesiredSize(writer) { + var stream = writer._ownerWritableStream; + var state = stream._state; + if (state === 'errored' || state === 'erroring') { + return null; + } + if (state === 'closed') { + return 0; + } + return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController); + } + function WritableStreamDefaultWriterRelease(writer) { + var stream = writer._ownerWritableStream; + var releasedError = new TypeError("Writer was released and can no longer be used to monitor the stream's closedness"); + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError); + // The state transitions to "errored" before the sink abort() method runs, but the writer.closed promise is not + // rejected until afterwards. This means that simply testing state will not work. + WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError); + stream._writer = undefined; + writer._ownerWritableStream = undefined; + } + function WritableStreamDefaultWriterWrite(writer, chunk) { + var stream = writer._ownerWritableStream; + var controller = stream._writableStreamController; + var chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk); + if (stream !== writer._ownerWritableStream) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + var state = stream._state; + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to')); + } + if (state === 'erroring') { + return promiseRejectedWith(stream._storedError); + } + var promise = WritableStreamAddWriteRequest(stream); + WritableStreamDefaultControllerWrite(controller, chunk, chunkSize); + return promise; + } + var closeSentinel = {}; + /** + * Allows control of a {@link WritableStream | writable stream}'s state and internal queue. + * + * @public + */ + var WritableStreamDefaultController = /** @class */ (function () { + function WritableStreamDefaultController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(WritableStreamDefaultController.prototype, "abortReason", { + /** + * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted. + * + * @deprecated + * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177. + * Use {@link WritableStreamDefaultController.signal}'s `reason` instead. + */ + get: function () { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('abortReason'); + } + return this._abortReason; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(WritableStreamDefaultController.prototype, "signal", { + /** + * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted. + */ + get: function () { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('signal'); + } + if (this._abortController === undefined) { + // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`. + // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill, + // so instead we only implement support for `signal` if we find a global `AbortController` constructor. + throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported'); + } + return this._abortController.signal; + }, + enumerable: false, + configurable: true + }); + /** + * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`. + * + * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying + * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the + * normal lifecycle of interactions with the underlying sink. + */ + WritableStreamDefaultController.prototype.error = function (e) { + if (e === void 0) { e = undefined; } + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('error'); + } + var state = this._controlledWritableStream._state; + if (state !== 'writable') { + // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so + // just treat it as a no-op. + return; + } + WritableStreamDefaultControllerError(this, e); + }; + /** @internal */ + WritableStreamDefaultController.prototype[AbortSteps] = function (reason) { + var result = this._abortAlgorithm(reason); + WritableStreamDefaultControllerClearAlgorithms(this); + return result; + }; + /** @internal */ + WritableStreamDefaultController.prototype[ErrorSteps] = function () { + ResetQueue(this); + }; + return WritableStreamDefaultController; + }()); + Object.defineProperties(WritableStreamDefaultController.prototype, { + abortReason: { enumerable: true }, + signal: { enumerable: true }, + error: { enumerable: true } + }); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultController.prototype, SymbolPolyfill.toStringTag, { + value: 'WritableStreamDefaultController', + configurable: true + }); + } + // Abstract operations implementing interface required by the WritableStream. + function IsWritableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultController; + } + function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledWritableStream = stream; + stream._writableStreamController = controller; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._abortReason = undefined; + controller._abortController = createAbortController(); + controller._started = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._writeAlgorithm = writeAlgorithm; + controller._closeAlgorithm = closeAlgorithm; + controller._abortAlgorithm = abortAlgorithm; + var backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + var startResult = startAlgorithm(); + var startPromise = promiseResolvedWith(startResult); + uponPromise(startPromise, function () { + controller._started = true; + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, function (r) { + controller._started = true; + WritableStreamDealWithRejection(stream, r); + return null; + }); + } + function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) { + var controller = Object.create(WritableStreamDefaultController.prototype); + var startAlgorithm; + var writeAlgorithm; + var closeAlgorithm; + var abortAlgorithm; + if (underlyingSink.start !== undefined) { + startAlgorithm = function () { return underlyingSink.start(controller); }; + } + else { + startAlgorithm = function () { return undefined; }; + } + if (underlyingSink.write !== undefined) { + writeAlgorithm = function (chunk) { return underlyingSink.write(chunk, controller); }; + } + else { + writeAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingSink.close !== undefined) { + closeAlgorithm = function () { return underlyingSink.close(); }; + } + else { + closeAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingSink.abort !== undefined) { + abortAlgorithm = function (reason) { return underlyingSink.abort(reason); }; + } + else { + abortAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + } + // ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls. + function WritableStreamDefaultControllerClearAlgorithms(controller) { + controller._writeAlgorithm = undefined; + controller._closeAlgorithm = undefined; + controller._abortAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; + } + function WritableStreamDefaultControllerClose(controller) { + EnqueueValueWithSize(controller, closeSentinel, 0); + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + } + function WritableStreamDefaultControllerGetChunkSize(controller, chunk) { + try { + return controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE); + return 1; + } + } + function WritableStreamDefaultControllerGetDesiredSize(controller) { + return controller._strategyHWM - controller._queueTotalSize; + } + function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) { + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE); + return; + } + var stream = controller._controlledWritableStream; + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') { + var backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + } + // Abstract operations for the WritableStreamDefaultController. + function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) { + var stream = controller._controlledWritableStream; + if (!controller._started) { + return; + } + if (stream._inFlightWriteRequest !== undefined) { + return; + } + var state = stream._state; + if (state === 'erroring') { + WritableStreamFinishErroring(stream); + return; + } + if (controller._queue.length === 0) { + return; + } + var value = PeekQueueValue(controller); + if (value === closeSentinel) { + WritableStreamDefaultControllerProcessClose(controller); + } + else { + WritableStreamDefaultControllerProcessWrite(controller, value); + } + } + function WritableStreamDefaultControllerErrorIfNeeded(controller, error) { + if (controller._controlledWritableStream._state === 'writable') { + WritableStreamDefaultControllerError(controller, error); + } + } + function WritableStreamDefaultControllerProcessClose(controller) { + var stream = controller._controlledWritableStream; + WritableStreamMarkCloseRequestInFlight(stream); + DequeueValue(controller); + var sinkClosePromise = controller._closeAlgorithm(); + WritableStreamDefaultControllerClearAlgorithms(controller); + uponPromise(sinkClosePromise, function () { + WritableStreamFinishInFlightClose(stream); + return null; + }, function (reason) { + WritableStreamFinishInFlightCloseWithError(stream, reason); + return null; + }); + } + function WritableStreamDefaultControllerProcessWrite(controller, chunk) { + var stream = controller._controlledWritableStream; + WritableStreamMarkFirstWriteRequestInFlight(stream); + var sinkWritePromise = controller._writeAlgorithm(chunk); + uponPromise(sinkWritePromise, function () { + WritableStreamFinishInFlightWrite(stream); + var state = stream._state; + DequeueValue(controller); + if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') { + var backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, function (reason) { + if (stream._state === 'writable') { + WritableStreamDefaultControllerClearAlgorithms(controller); + } + WritableStreamFinishInFlightWriteWithError(stream, reason); + return null; + }); + } + function WritableStreamDefaultControllerGetBackpressure(controller) { + var desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller); + return desiredSize <= 0; + } + // A client of WritableStreamDefaultController may use these functions directly to bypass state check. + function WritableStreamDefaultControllerError(controller, error) { + var stream = controller._controlledWritableStream; + WritableStreamDefaultControllerClearAlgorithms(controller); + WritableStreamStartErroring(stream, error); + } + // Helper functions for the WritableStream. + function streamBrandCheckException$2(name) { + return new TypeError("WritableStream.prototype.".concat(name, " can only be used on a WritableStream")); + } + // Helper functions for the WritableStreamDefaultController. + function defaultControllerBrandCheckException$2(name) { + return new TypeError("WritableStreamDefaultController.prototype.".concat(name, " can only be used on a WritableStreamDefaultController")); + } + // Helper functions for the WritableStreamDefaultWriter. + function defaultWriterBrandCheckException(name) { + return new TypeError("WritableStreamDefaultWriter.prototype.".concat(name, " can only be used on a WritableStreamDefaultWriter")); + } + function defaultWriterLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released writer'); + } + function defaultWriterClosedPromiseInitialize(writer) { + writer._closedPromise = newPromise(function (resolve, reject) { + writer._closedPromise_resolve = resolve; + writer._closedPromise_reject = reject; + writer._closedPromiseState = 'pending'; + }); + } + function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseReject(writer, reason); + } + function defaultWriterClosedPromiseInitializeAsResolved(writer) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseResolve(writer); + } + function defaultWriterClosedPromiseReject(writer, reason) { + if (writer._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._closedPromise); + writer._closedPromise_reject(reason); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'rejected'; + } + function defaultWriterClosedPromiseResetToRejected(writer, reason) { + defaultWriterClosedPromiseInitializeAsRejected(writer, reason); + } + function defaultWriterClosedPromiseResolve(writer) { + if (writer._closedPromise_resolve === undefined) { + return; + } + writer._closedPromise_resolve(undefined); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'resolved'; + } + function defaultWriterReadyPromiseInitialize(writer) { + writer._readyPromise = newPromise(function (resolve, reject) { + writer._readyPromise_resolve = resolve; + writer._readyPromise_reject = reject; + }); + writer._readyPromiseState = 'pending'; + } + function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseReject(writer, reason); + } + function defaultWriterReadyPromiseInitializeAsResolved(writer) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseResolve(writer); + } + function defaultWriterReadyPromiseReject(writer, reason) { + if (writer._readyPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._readyPromise); + writer._readyPromise_reject(reason); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'rejected'; + } + function defaultWriterReadyPromiseReset(writer) { + defaultWriterReadyPromiseInitialize(writer); + } + function defaultWriterReadyPromiseResetToRejected(writer, reason) { + defaultWriterReadyPromiseInitializeAsRejected(writer, reason); + } + function defaultWriterReadyPromiseResolve(writer) { + if (writer._readyPromise_resolve === undefined) { + return; + } + writer._readyPromise_resolve(undefined); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'fulfilled'; + } + + /// + function getGlobals() { + if (typeof globalThis !== 'undefined') { + return globalThis; + } + else if (typeof self !== 'undefined') { + return self; + } + else if (typeof global !== 'undefined') { + return global; + } + return undefined; + } + var globals = getGlobals(); + + /// + function isDOMExceptionConstructor(ctor) { + if (!(typeof ctor === 'function' || typeof ctor === 'object')) { + return false; + } + if (ctor.name !== 'DOMException') { + return false; + } + try { + new ctor(); + return true; + } + catch (_a) { + return false; + } + } + /** + * Support: + * - Web browsers + * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87) + */ + function getFromGlobal() { + var ctor = globals === null || globals === void 0 ? void 0 : globals.DOMException; + return isDOMExceptionConstructor(ctor) ? ctor : undefined; + } + /** + * Support: + * - All platforms + */ + function createPolyfill() { + // eslint-disable-next-line @typescript-eslint/no-shadow + var ctor = function DOMException(message, name) { + this.message = message || ''; + this.name = name || 'Error'; + if (Error.captureStackTrace) { + Error.captureStackTrace(this, this.constructor); + } + }; + setFunctionName(ctor, 'DOMException'); + ctor.prototype = Object.create(Error.prototype); + Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true }); + return ctor; + } + // eslint-disable-next-line @typescript-eslint/no-redeclare + var DOMException = getFromGlobal() || createPolyfill(); + + function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) { + var reader = AcquireReadableStreamDefaultReader(source); + var writer = AcquireWritableStreamDefaultWriter(dest); + source._disturbed = true; + var shuttingDown = false; + // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown. + var currentWrite = promiseResolvedWith(undefined); + return newPromise(function (resolve, reject) { + var abortAlgorithm; + if (signal !== undefined) { + abortAlgorithm = function () { + var error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError'); + var actions = []; + if (!preventAbort) { + actions.push(function () { + if (dest._state === 'writable') { + return WritableStreamAbort(dest, error); + } + return promiseResolvedWith(undefined); + }); + } + if (!preventCancel) { + actions.push(function () { + if (source._state === 'readable') { + return ReadableStreamCancel(source, error); + } + return promiseResolvedWith(undefined); + }); + } + shutdownWithAction(function () { return Promise.all(actions.map(function (action) { return action(); })); }, true, error); + }; + if (signal.aborted) { + abortAlgorithm(); + return; + } + signal.addEventListener('abort', abortAlgorithm); + } + // Using reader and writer, read all chunks from this and write them to dest + // - Backpressure must be enforced + // - Shutdown must stop all activity + function pipeLoop() { + return newPromise(function (resolveLoop, rejectLoop) { + function next(done) { + if (done) { + resolveLoop(); + } + else { + // Use `PerformPromiseThen` instead of `uponPromise` to avoid + // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers + PerformPromiseThen(pipeStep(), next, rejectLoop); + } + } + next(false); + }); + } + function pipeStep() { + if (shuttingDown) { + return promiseResolvedWith(true); + } + return PerformPromiseThen(writer._readyPromise, function () { + return newPromise(function (resolveRead, rejectRead) { + ReadableStreamDefaultReaderRead(reader, { + _chunkSteps: function (chunk) { + currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop); + resolveRead(false); + }, + _closeSteps: function () { return resolveRead(true); }, + _errorSteps: rejectRead + }); + }); + }); + } + // Errors must be propagated forward + isOrBecomesErrored(source, reader._closedPromise, function (storedError) { + if (!preventAbort) { + shutdownWithAction(function () { return WritableStreamAbort(dest, storedError); }, true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Errors must be propagated backward + isOrBecomesErrored(dest, writer._closedPromise, function (storedError) { + if (!preventCancel) { + shutdownWithAction(function () { return ReadableStreamCancel(source, storedError); }, true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Closing must be propagated forward + isOrBecomesClosed(source, reader._closedPromise, function () { + if (!preventClose) { + shutdownWithAction(function () { return WritableStreamDefaultWriterCloseWithErrorPropagation(writer); }); + } + else { + shutdown(); + } + return null; + }); + // Closing must be propagated backward + if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') { + var destClosed_1 = new TypeError('the destination writable stream closed before all data could be piped to it'); + if (!preventCancel) { + shutdownWithAction(function () { return ReadableStreamCancel(source, destClosed_1); }, true, destClosed_1); + } + else { + shutdown(true, destClosed_1); + } + } + setPromiseIsHandledToTrue(pipeLoop()); + function waitForWritesToFinish() { + // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait + // for that too. + var oldCurrentWrite = currentWrite; + return PerformPromiseThen(currentWrite, function () { return oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined; }); + } + function isOrBecomesErrored(stream, promise, action) { + if (stream._state === 'errored') { + action(stream._storedError); + } + else { + uponRejection(promise, action); + } + } + function isOrBecomesClosed(stream, promise, action) { + if (stream._state === 'closed') { + action(); + } + else { + uponFulfillment(promise, action); + } + } + function shutdownWithAction(action, originalIsError, originalError) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), doTheRest); + } + else { + doTheRest(); + } + function doTheRest() { + uponPromise(action(), function () { return finalize(originalIsError, originalError); }, function (newError) { return finalize(true, newError); }); + return null; + } + } + function shutdown(isError, error) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), function () { return finalize(isError, error); }); + } + else { + finalize(isError, error); + } + } + function finalize(isError, error) { + WritableStreamDefaultWriterRelease(writer); + ReadableStreamReaderGenericRelease(reader); + if (signal !== undefined) { + signal.removeEventListener('abort', abortAlgorithm); + } + if (isError) { + reject(error); + } + else { + resolve(undefined); + } + return null; + } + }); + } + + /** + * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue. + * + * @public + */ + var ReadableStreamDefaultController = /** @class */ (function () { + function ReadableStreamDefaultController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(ReadableStreamDefaultController.prototype, "desiredSize", { + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying source ought to use this information to determine when and how to apply backpressure. + */ + get: function () { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('desiredSize'); + } + return ReadableStreamDefaultControllerGetDesiredSize(this); + }, + enumerable: false, + configurable: true + }); + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + ReadableStreamDefaultController.prototype.close = function () { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('close'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits close'); + } + ReadableStreamDefaultControllerClose(this); + }; + ReadableStreamDefaultController.prototype.enqueue = function (chunk) { + if (chunk === void 0) { chunk = undefined; } + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('enqueue'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits enqueue'); + } + return ReadableStreamDefaultControllerEnqueue(this, chunk); + }; + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + ReadableStreamDefaultController.prototype.error = function (e) { + if (e === void 0) { e = undefined; } + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('error'); + } + ReadableStreamDefaultControllerError(this, e); + }; + /** @internal */ + ReadableStreamDefaultController.prototype[CancelSteps] = function (reason) { + ResetQueue(this); + var result = this._cancelAlgorithm(reason); + ReadableStreamDefaultControllerClearAlgorithms(this); + return result; + }; + /** @internal */ + ReadableStreamDefaultController.prototype[PullSteps] = function (readRequest) { + var stream = this._controlledReadableStream; + if (this._queue.length > 0) { + var chunk = DequeueValue(this); + if (this._closeRequested && this._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(this); + ReadableStreamClose(stream); + } + else { + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + readRequest._chunkSteps(chunk); + } + else { + ReadableStreamAddReadRequest(stream, readRequest); + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + }; + /** @internal */ + ReadableStreamDefaultController.prototype[ReleaseSteps] = function () { + // Do nothing. + }; + return ReadableStreamDefaultController; + }()); + Object.defineProperties(ReadableStreamDefaultController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(ReadableStreamDefaultController.prototype.close, 'close'); + setFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue'); + setFunctionName(ReadableStreamDefaultController.prototype.error, 'error'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultController.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamDefaultController', + configurable: true + }); + } + // Abstract operations for the ReadableStreamDefaultController. + function IsReadableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) { + return false; + } + return x instanceof ReadableStreamDefaultController; + } + function ReadableStreamDefaultControllerCallPullIfNeeded(controller) { + var shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + var pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, function () { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + return null; + }, function (e) { + ReadableStreamDefaultControllerError(controller, e); + return null; + }); + } + function ReadableStreamDefaultControllerShouldCallPull(controller) { + var stream = controller._controlledReadableStream; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return false; + } + if (!controller._started) { + return false; + } + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + var desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; + } + function ReadableStreamDefaultControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; + } + // A client of ReadableStreamDefaultController may use these functions directly to bypass state check. + function ReadableStreamDefaultControllerClose(controller) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + var stream = controller._controlledReadableStream; + controller._closeRequested = true; + if (controller._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } + } + function ReadableStreamDefaultControllerEnqueue(controller, chunk) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + var stream = controller._controlledReadableStream; + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + ReadableStreamFulfillReadRequest(stream, chunk, false); + } + else { + var chunkSize = void 0; + try { + chunkSize = controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + ReadableStreamDefaultControllerError(controller, chunkSizeE); + throw chunkSizeE; + } + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + ReadableStreamDefaultControllerError(controller, enqueueE); + throw enqueueE; + } + } + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + function ReadableStreamDefaultControllerError(controller, e) { + var stream = controller._controlledReadableStream; + if (stream._state !== 'readable') { + return; + } + ResetQueue(controller); + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); + } + function ReadableStreamDefaultControllerGetDesiredSize(controller) { + var state = controller._controlledReadableStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; + } + // This is used in the implementation of TransformStream. + function ReadableStreamDefaultControllerHasBackpressure(controller) { + if (ReadableStreamDefaultControllerShouldCallPull(controller)) { + return false; + } + return true; + } + function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) { + var state = controller._controlledReadableStream._state; + if (!controller._closeRequested && state === 'readable') { + return true; + } + return false; + } + function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledReadableStream = stream; + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._started = false; + controller._closeRequested = false; + controller._pullAgain = false; + controller._pulling = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + stream._readableStreamController = controller; + var startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), function () { + controller._started = true; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + return null; + }, function (r) { + ReadableStreamDefaultControllerError(controller, r); + return null; + }); + } + function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) { + var controller = Object.create(ReadableStreamDefaultController.prototype); + var startAlgorithm; + var pullAlgorithm; + var cancelAlgorithm; + if (underlyingSource.start !== undefined) { + startAlgorithm = function () { return underlyingSource.start(controller); }; + } + else { + startAlgorithm = function () { return undefined; }; + } + if (underlyingSource.pull !== undefined) { + pullAlgorithm = function () { return underlyingSource.pull(controller); }; + } + else { + pullAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingSource.cancel !== undefined) { + cancelAlgorithm = function (reason) { return underlyingSource.cancel(reason); }; + } + else { + cancelAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + } + // Helper functions for the ReadableStreamDefaultController. + function defaultControllerBrandCheckException$1(name) { + return new TypeError("ReadableStreamDefaultController.prototype.".concat(name, " can only be used on a ReadableStreamDefaultController")); + } + + function ReadableStreamTee(stream, cloneForBranch2) { + if (IsReadableByteStreamController(stream._readableStreamController)) { + return ReadableByteStreamTee(stream); + } + return ReadableStreamDefaultTee(stream); + } + function ReadableStreamDefaultTee(stream, cloneForBranch2) { + var reader = AcquireReadableStreamDefaultReader(stream); + var reading = false; + var readAgain = false; + var canceled1 = false; + var canceled2 = false; + var reason1; + var reason2; + var branch1; + var branch2; + var resolveCancelPromise; + var cancelPromise = newPromise(function (resolve) { + resolveCancelPromise = resolve; + }); + function pullAlgorithm() { + if (reading) { + readAgain = true; + return promiseResolvedWith(undefined); + } + reading = true; + var readRequest = { + _chunkSteps: function (chunk) { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(function () { + readAgain = false; + var chunk1 = chunk; + var chunk2 = chunk; + // There is no way to access the cloning code right now in the reference implementation. + // If we add one then we'll need an implementation for serializable objects. + // if (!canceled2 && cloneForBranch2) { + // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2)); + // } + if (!canceled1) { + ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgain) { + pullAlgorithm(); + } + }); + }, + _closeSteps: function () { + reading = false; + if (!canceled1) { + ReadableStreamDefaultControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableStreamDefaultControllerClose(branch2._readableStreamController); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: function () { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + // do nothing + } + branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm); + branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm); + uponRejection(reader._closedPromise, function (r) { + ReadableStreamDefaultControllerError(branch1._readableStreamController, r); + ReadableStreamDefaultControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + return [branch1, branch2]; + } + function ReadableByteStreamTee(stream) { + var reader = AcquireReadableStreamDefaultReader(stream); + var reading = false; + var readAgainForBranch1 = false; + var readAgainForBranch2 = false; + var canceled1 = false; + var canceled2 = false; + var reason1; + var reason2; + var branch1; + var branch2; + var resolveCancelPromise; + var cancelPromise = newPromise(function (resolve) { + resolveCancelPromise = resolve; + }); + function forwardReaderError(thisReader) { + uponRejection(thisReader._closedPromise, function (r) { + if (thisReader !== reader) { + return null; + } + ReadableByteStreamControllerError(branch1._readableStreamController, r); + ReadableByteStreamControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + } + function pullWithDefaultReader() { + if (IsReadableStreamBYOBReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamDefaultReader(stream); + forwardReaderError(reader); + } + var readRequest = { + _chunkSteps: function (chunk) { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(function () { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + var chunk1 = chunk; + var chunk2 = chunk; + if (!canceled1 && !canceled2) { + try { + chunk2 = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(branch1._readableStreamController, cloneE); + ReadableByteStreamControllerError(branch2._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + } + if (!canceled1) { + ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: function () { + reading = false; + if (!canceled1) { + ReadableByteStreamControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableByteStreamControllerClose(branch2._readableStreamController); + } + if (branch1._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch1._readableStreamController, 0); + } + if (branch2._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch2._readableStreamController, 0); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: function () { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + } + function pullWithBYOBReader(view, forBranch2) { + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamBYOBReader(stream); + forwardReaderError(reader); + } + var byobBranch = forBranch2 ? branch2 : branch1; + var otherBranch = forBranch2 ? branch1 : branch2; + var readIntoRequest = { + _chunkSteps: function (chunk) { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(function () { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + var byobCanceled = forBranch2 ? canceled2 : canceled1; + var otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!otherCanceled) { + var clonedChunk = void 0; + try { + clonedChunk = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE); + ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk); + } + else if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: function (chunk) { + reading = false; + var byobCanceled = forBranch2 ? canceled2 : canceled1; + var otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!byobCanceled) { + ReadableByteStreamControllerClose(byobBranch._readableStreamController); + } + if (!otherCanceled) { + ReadableByteStreamControllerClose(otherBranch._readableStreamController); + } + if (chunk !== undefined) { + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0); + } + } + if (!byobCanceled || !otherCanceled) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: function () { + reading = false; + } + }; + ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest); + } + function pull1Algorithm() { + if (reading) { + readAgainForBranch1 = true; + return promiseResolvedWith(undefined); + } + reading = true; + var byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, false); + } + return promiseResolvedWith(undefined); + } + function pull2Algorithm() { + if (reading) { + readAgainForBranch2 = true; + return promiseResolvedWith(undefined); + } + reading = true; + var byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, true); + } + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + return; + } + branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm); + branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm); + forwardReaderError(reader); + return [branch1, branch2]; + } + + function isReadableStreamLike(stream) { + return typeIsObject(stream) && typeof stream.getReader !== 'undefined'; + } + + function ReadableStreamFrom(source) { + if (isReadableStreamLike(source)) { + return ReadableStreamFromDefaultReader(source.getReader()); + } + return ReadableStreamFromIterable(source); + } + function ReadableStreamFromIterable(asyncIterable) { + var stream; + var iteratorRecord = GetIterator(asyncIterable, 'async'); + var startAlgorithm = noop; + function pullAlgorithm() { + var nextResult; + try { + nextResult = IteratorNext(iteratorRecord); + } + catch (e) { + return promiseRejectedWith(e); + } + var nextPromise = promiseResolvedWith(nextResult); + return transformPromiseWith(nextPromise, function (iterResult) { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object'); + } + var done = IteratorComplete(iterResult); + if (done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + var value = IteratorValue(iterResult); + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + var iterator = iteratorRecord.iterator; + var returnMethod; + try { + returnMethod = GetMethod(iterator, 'return'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (returnMethod === undefined) { + return promiseResolvedWith(undefined); + } + var returnResult; + try { + returnResult = reflectCall(returnMethod, iterator, [reason]); + } + catch (e) { + return promiseRejectedWith(e); + } + var returnPromise = promiseResolvedWith(returnResult); + return transformPromiseWith(returnPromise, function (iterResult) { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object'); + } + return undefined; + }); + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; + } + function ReadableStreamFromDefaultReader(reader) { + var stream; + var startAlgorithm = noop; + function pullAlgorithm() { + var readPromise; + try { + readPromise = reader.read(); + } + catch (e) { + return promiseRejectedWith(e); + } + return transformPromiseWith(readPromise, function (readResult) { + if (!typeIsObject(readResult)) { + throw new TypeError('The promise returned by the reader.read() method must fulfill with an object'); + } + if (readResult.done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + var value = readResult.value; + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + try { + return promiseResolvedWith(reader.cancel(reason)); + } + catch (e) { + return promiseRejectedWith(e); + } + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; + } + + function convertUnderlyingDefaultOrByteSource(source, context) { + assertDictionary(source, context); + var original = source; + var autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize; + var cancel = original === null || original === void 0 ? void 0 : original.cancel; + var pull = original === null || original === void 0 ? void 0 : original.pull; + var start = original === null || original === void 0 ? void 0 : original.start; + var type = original === null || original === void 0 ? void 0 : original.type; + return { + autoAllocateChunkSize: autoAllocateChunkSize === undefined ? + undefined : + convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, "".concat(context, " has member 'autoAllocateChunkSize' that")), + cancel: cancel === undefined ? + undefined : + convertUnderlyingSourceCancelCallback(cancel, original, "".concat(context, " has member 'cancel' that")), + pull: pull === undefined ? + undefined : + convertUnderlyingSourcePullCallback(pull, original, "".concat(context, " has member 'pull' that")), + start: start === undefined ? + undefined : + convertUnderlyingSourceStartCallback(start, original, "".concat(context, " has member 'start' that")), + type: type === undefined ? undefined : convertReadableStreamType(type, "".concat(context, " has member 'type' that")) + }; + } + function convertUnderlyingSourceCancelCallback(fn, original, context) { + assertFunction(fn, context); + return function (reason) { return promiseCall(fn, original, [reason]); }; + } + function convertUnderlyingSourcePullCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return promiseCall(fn, original, [controller]); }; + } + function convertUnderlyingSourceStartCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return reflectCall(fn, original, [controller]); }; + } + function convertReadableStreamType(type, context) { + type = "".concat(type); + if (type !== 'bytes') { + throw new TypeError("".concat(context, " '").concat(type, "' is not a valid enumeration value for ReadableStreamType")); + } + return type; + } + + function convertIteratorOptions(options, context) { + assertDictionary(options, context); + var preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + return { preventCancel: Boolean(preventCancel) }; + } + + function convertPipeOptions(options, context) { + assertDictionary(options, context); + var preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort; + var preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + var preventClose = options === null || options === void 0 ? void 0 : options.preventClose; + var signal = options === null || options === void 0 ? void 0 : options.signal; + if (signal !== undefined) { + assertAbortSignal(signal, "".concat(context, " has member 'signal' that")); + } + return { + preventAbort: Boolean(preventAbort), + preventCancel: Boolean(preventCancel), + preventClose: Boolean(preventClose), + signal: signal + }; + } + function assertAbortSignal(signal, context) { + if (!isAbortSignal(signal)) { + throw new TypeError("".concat(context, " is not an AbortSignal.")); + } + } + + function convertReadableWritablePair(pair, context) { + assertDictionary(pair, context); + var readable = pair === null || pair === void 0 ? void 0 : pair.readable; + assertRequiredField(readable, 'readable', 'ReadableWritablePair'); + assertReadableStream(readable, "".concat(context, " has member 'readable' that")); + var writable = pair === null || pair === void 0 ? void 0 : pair.writable; + assertRequiredField(writable, 'writable', 'ReadableWritablePair'); + assertWritableStream(writable, "".concat(context, " has member 'writable' that")); + return { readable: readable, writable: writable }; + } + + /** + * A readable stream represents a source of data, from which you can read. + * + * @public + */ + var ReadableStream = /** @class */ (function () { + function ReadableStream(rawUnderlyingSource, rawStrategy) { + if (rawUnderlyingSource === void 0) { rawUnderlyingSource = {}; } + if (rawStrategy === void 0) { rawStrategy = {}; } + if (rawUnderlyingSource === undefined) { + rawUnderlyingSource = null; + } + else { + assertObject(rawUnderlyingSource, 'First parameter'); + } + var strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + var underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter'); + InitializeReadableStream(this); + if (underlyingSource.type === 'bytes') { + if (strategy.size !== undefined) { + throw new RangeError('The strategy for a byte stream cannot have a size function'); + } + var highWaterMark = ExtractHighWaterMark(strategy, 0); + SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark); + } + else { + var sizeAlgorithm = ExtractSizeAlgorithm(strategy); + var highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm); + } + } + Object.defineProperty(ReadableStream.prototype, "locked", { + /** + * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}. + */ + get: function () { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('locked'); + } + return IsReadableStreamLocked(this); + }, + enumerable: false, + configurable: true + }); + /** + * Cancels the stream, signaling a loss of interest in the stream by a consumer. + * + * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()} + * method, which might or might not use it. + */ + ReadableStream.prototype.cancel = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('cancel')); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader')); + } + return ReadableStreamCancel(this, reason); + }; + ReadableStream.prototype.getReader = function (rawOptions) { + if (rawOptions === void 0) { rawOptions = undefined; } + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('getReader'); + } + var options = convertReaderOptions(rawOptions, 'First parameter'); + if (options.mode === undefined) { + return AcquireReadableStreamDefaultReader(this); + } + return AcquireReadableStreamBYOBReader(this); + }; + ReadableStream.prototype.pipeThrough = function (rawTransform, rawOptions) { + if (rawOptions === void 0) { rawOptions = {}; } + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('pipeThrough'); + } + assertRequiredArgument(rawTransform, 1, 'pipeThrough'); + var transform = convertReadableWritablePair(rawTransform, 'First parameter'); + var options = convertPipeOptions(rawOptions, 'Second parameter'); + if (IsReadableStreamLocked(this)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream'); + } + if (IsWritableStreamLocked(transform.writable)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream'); + } + var promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + setPromiseIsHandledToTrue(promise); + return transform.readable; + }; + ReadableStream.prototype.pipeTo = function (destination, rawOptions) { + if (rawOptions === void 0) { rawOptions = {}; } + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('pipeTo')); + } + if (destination === undefined) { + return promiseRejectedWith("Parameter 1 is required in 'pipeTo'."); + } + if (!IsWritableStream(destination)) { + return promiseRejectedWith(new TypeError("ReadableStream.prototype.pipeTo's first argument must be a WritableStream")); + } + var options; + try { + options = convertPipeOptions(rawOptions, 'Second parameter'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')); + } + if (IsWritableStreamLocked(destination)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')); + } + return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + }; + /** + * Tees this readable stream, returning a two-element array containing the two resulting branches as + * new {@link ReadableStream} instances. + * + * Teeing a stream will lock it, preventing any other consumer from acquiring a reader. + * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be + * propagated to the stream's underlying source. + * + * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable, + * this could allow interference between the two branches. + */ + ReadableStream.prototype.tee = function () { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('tee'); + } + var branches = ReadableStreamTee(this); + return CreateArrayFromList(branches); + }; + ReadableStream.prototype.values = function (rawOptions) { + if (rawOptions === void 0) { rawOptions = undefined; } + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('values'); + } + var options = convertIteratorOptions(rawOptions, 'First parameter'); + return AcquireReadableStreamAsyncIterator(this, options.preventCancel); + }; + ReadableStream.prototype[SymbolAsyncIterator] = function (options) { + // Stub implementation, overridden below + return this.values(options); + }; + /** + * Creates a new ReadableStream wrapping the provided iterable or async iterable. + * + * This can be used to adapt various kinds of objects into a readable stream, + * such as an array, an async generator, or a Node.js readable stream. + */ + ReadableStream.from = function (asyncIterable) { + return ReadableStreamFrom(asyncIterable); + }; + return ReadableStream; + }()); + Object.defineProperties(ReadableStream, { + from: { enumerable: true } + }); + Object.defineProperties(ReadableStream.prototype, { + cancel: { enumerable: true }, + getReader: { enumerable: true }, + pipeThrough: { enumerable: true }, + pipeTo: { enumerable: true }, + tee: { enumerable: true }, + values: { enumerable: true }, + locked: { enumerable: true } + }); + setFunctionName(ReadableStream.from, 'from'); + setFunctionName(ReadableStream.prototype.cancel, 'cancel'); + setFunctionName(ReadableStream.prototype.getReader, 'getReader'); + setFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough'); + setFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo'); + setFunctionName(ReadableStream.prototype.tee, 'tee'); + setFunctionName(ReadableStream.prototype.values, 'values'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStream.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStream', + configurable: true + }); + } + Object.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, { + value: ReadableStream.prototype.values, + writable: true, + configurable: true + }); + // Abstract operations for the ReadableStream. + // Throws if and only if startAlgorithm throws. + function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + if (highWaterMark === void 0) { highWaterMark = 1; } + if (sizeAlgorithm === void 0) { sizeAlgorithm = function () { return 1; }; } + var stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + var controller = Object.create(ReadableStreamDefaultController.prototype); + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + return stream; + } + // Throws if and only if startAlgorithm throws. + function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) { + var stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + var controller = Object.create(ReadableByteStreamController.prototype); + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined); + return stream; + } + function InitializeReadableStream(stream) { + stream._state = 'readable'; + stream._reader = undefined; + stream._storedError = undefined; + stream._disturbed = false; + } + function IsReadableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) { + return false; + } + return x instanceof ReadableStream; + } + function IsReadableStreamLocked(stream) { + if (stream._reader === undefined) { + return false; + } + return true; + } + // ReadableStream API exposed for controllers. + function ReadableStreamCancel(stream, reason) { + stream._disturbed = true; + if (stream._state === 'closed') { + return promiseResolvedWith(undefined); + } + if (stream._state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + ReadableStreamClose(stream); + var reader = stream._reader; + if (reader !== undefined && IsReadableStreamBYOBReader(reader)) { + var readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(function (readIntoRequest) { + readIntoRequest._closeSteps(undefined); + }); + } + var sourceCancelPromise = stream._readableStreamController[CancelSteps](reason); + return transformPromiseWith(sourceCancelPromise, noop); + } + function ReadableStreamClose(stream) { + stream._state = 'closed'; + var reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseResolve(reader); + if (IsReadableStreamDefaultReader(reader)) { + var readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(function (readRequest) { + readRequest._closeSteps(); + }); + } + } + function ReadableStreamError(stream, e) { + stream._state = 'errored'; + stream._storedError = e; + var reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseReject(reader, e); + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + else { + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } + } + // Helper functions for the ReadableStream. + function streamBrandCheckException$1(name) { + return new TypeError("ReadableStream.prototype.".concat(name, " can only be used on a ReadableStream")); + } + + function convertQueuingStrategyInit(init, context) { + assertDictionary(init, context); + var highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit'); + return { + highWaterMark: convertUnrestrictedDouble(highWaterMark) + }; + } + + // The size function must not have a prototype property nor be a constructor + var byteLengthSizeFunction = function (chunk) { + return chunk.byteLength; + }; + setFunctionName(byteLengthSizeFunction, 'size'); + /** + * A queuing strategy that counts the number of bytes in each chunk. + * + * @public + */ + var ByteLengthQueuingStrategy = /** @class */ (function () { + function ByteLengthQueuingStrategy(options) { + assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark; + } + Object.defineProperty(ByteLengthQueuingStrategy.prototype, "highWaterMark", { + /** + * Returns the high water mark provided to the constructor. + */ + get: function () { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('highWaterMark'); + } + return this._byteLengthQueuingStrategyHighWaterMark; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(ByteLengthQueuingStrategy.prototype, "size", { + /** + * Measures the size of `chunk` by returning the value of its `byteLength` property. + */ + get: function () { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('size'); + } + return byteLengthSizeFunction; + }, + enumerable: false, + configurable: true + }); + return ByteLengthQueuingStrategy; + }()); + Object.defineProperties(ByteLengthQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } + }); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ByteLengthQueuingStrategy.prototype, SymbolPolyfill.toStringTag, { + value: 'ByteLengthQueuingStrategy', + configurable: true + }); + } + // Helper functions for the ByteLengthQueuingStrategy. + function byteLengthBrandCheckException(name) { + return new TypeError("ByteLengthQueuingStrategy.prototype.".concat(name, " can only be used on a ByteLengthQueuingStrategy")); + } + function IsByteLengthQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof ByteLengthQueuingStrategy; + } + + // The size function must not have a prototype property nor be a constructor + var countSizeFunction = function () { + return 1; + }; + setFunctionName(countSizeFunction, 'size'); + /** + * A queuing strategy that counts the number of chunks. + * + * @public + */ + var CountQueuingStrategy = /** @class */ (function () { + function CountQueuingStrategy(options) { + assertRequiredArgument(options, 1, 'CountQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._countQueuingStrategyHighWaterMark = options.highWaterMark; + } + Object.defineProperty(CountQueuingStrategy.prototype, "highWaterMark", { + /** + * Returns the high water mark provided to the constructor. + */ + get: function () { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('highWaterMark'); + } + return this._countQueuingStrategyHighWaterMark; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(CountQueuingStrategy.prototype, "size", { + /** + * Measures the size of `chunk` by always returning 1. + * This ensures that the total queue size is a count of the number of chunks in the queue. + */ + get: function () { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('size'); + } + return countSizeFunction; + }, + enumerable: false, + configurable: true + }); + return CountQueuingStrategy; + }()); + Object.defineProperties(CountQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } + }); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(CountQueuingStrategy.prototype, SymbolPolyfill.toStringTag, { + value: 'CountQueuingStrategy', + configurable: true + }); + } + // Helper functions for the CountQueuingStrategy. + function countBrandCheckException(name) { + return new TypeError("CountQueuingStrategy.prototype.".concat(name, " can only be used on a CountQueuingStrategy")); + } + function IsCountQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof CountQueuingStrategy; + } + + function convertTransformer(original, context) { + assertDictionary(original, context); + var cancel = original === null || original === void 0 ? void 0 : original.cancel; + var flush = original === null || original === void 0 ? void 0 : original.flush; + var readableType = original === null || original === void 0 ? void 0 : original.readableType; + var start = original === null || original === void 0 ? void 0 : original.start; + var transform = original === null || original === void 0 ? void 0 : original.transform; + var writableType = original === null || original === void 0 ? void 0 : original.writableType; + return { + cancel: cancel === undefined ? + undefined : + convertTransformerCancelCallback(cancel, original, "".concat(context, " has member 'cancel' that")), + flush: flush === undefined ? + undefined : + convertTransformerFlushCallback(flush, original, "".concat(context, " has member 'flush' that")), + readableType: readableType, + start: start === undefined ? + undefined : + convertTransformerStartCallback(start, original, "".concat(context, " has member 'start' that")), + transform: transform === undefined ? + undefined : + convertTransformerTransformCallback(transform, original, "".concat(context, " has member 'transform' that")), + writableType: writableType + }; + } + function convertTransformerFlushCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return promiseCall(fn, original, [controller]); }; + } + function convertTransformerStartCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return reflectCall(fn, original, [controller]); }; + } + function convertTransformerTransformCallback(fn, original, context) { + assertFunction(fn, context); + return function (chunk, controller) { return promiseCall(fn, original, [chunk, controller]); }; + } + function convertTransformerCancelCallback(fn, original, context) { + assertFunction(fn, context); + return function (reason) { return promiseCall(fn, original, [reason]); }; + } + + // Class TransformStream + /** + * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream}, + * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side. + * In a manner specific to the transform stream in question, writes to the writable side result in new data being + * made available for reading from the readable side. + * + * @public + */ + var TransformStream = /** @class */ (function () { + function TransformStream(rawTransformer, rawWritableStrategy, rawReadableStrategy) { + if (rawTransformer === void 0) { rawTransformer = {}; } + if (rawWritableStrategy === void 0) { rawWritableStrategy = {}; } + if (rawReadableStrategy === void 0) { rawReadableStrategy = {}; } + if (rawTransformer === undefined) { + rawTransformer = null; + } + var writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter'); + var readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter'); + var transformer = convertTransformer(rawTransformer, 'First parameter'); + if (transformer.readableType !== undefined) { + throw new RangeError('Invalid readableType specified'); + } + if (transformer.writableType !== undefined) { + throw new RangeError('Invalid writableType specified'); + } + var readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0); + var readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy); + var writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1); + var writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy); + var startPromise_resolve; + var startPromise = newPromise(function (resolve) { + startPromise_resolve = resolve; + }); + InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + SetUpTransformStreamDefaultControllerFromTransformer(this, transformer); + if (transformer.start !== undefined) { + startPromise_resolve(transformer.start(this._transformStreamController)); + } + else { + startPromise_resolve(undefined); + } + } + Object.defineProperty(TransformStream.prototype, "readable", { + /** + * The readable side of the transform stream. + */ + get: function () { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('readable'); + } + return this._readable; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(TransformStream.prototype, "writable", { + /** + * The writable side of the transform stream. + */ + get: function () { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('writable'); + } + return this._writable; + }, + enumerable: false, + configurable: true + }); + return TransformStream; + }()); + Object.defineProperties(TransformStream.prototype, { + readable: { enumerable: true }, + writable: { enumerable: true } + }); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(TransformStream.prototype, SymbolPolyfill.toStringTag, { + value: 'TransformStream', + configurable: true + }); + } + function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) { + function startAlgorithm() { + return startPromise; + } + function writeAlgorithm(chunk) { + return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk); + } + function abortAlgorithm(reason) { + return TransformStreamDefaultSinkAbortAlgorithm(stream, reason); + } + function closeAlgorithm() { + return TransformStreamDefaultSinkCloseAlgorithm(stream); + } + stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm); + function pullAlgorithm() { + return TransformStreamDefaultSourcePullAlgorithm(stream); + } + function cancelAlgorithm(reason) { + return TransformStreamDefaultSourceCancelAlgorithm(stream, reason); + } + stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure. + stream._backpressure = undefined; + stream._backpressureChangePromise = undefined; + stream._backpressureChangePromise_resolve = undefined; + TransformStreamSetBackpressure(stream, true); + stream._transformStreamController = undefined; + } + function IsTransformStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) { + return false; + } + return x instanceof TransformStream; + } + // This is a no-op if both sides are already errored. + function TransformStreamError(stream, e) { + ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e); + TransformStreamErrorWritableAndUnblockWrite(stream, e); + } + function TransformStreamErrorWritableAndUnblockWrite(stream, e) { + TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController); + WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e); + TransformStreamUnblockWrite(stream); + } + function TransformStreamUnblockWrite(stream) { + if (stream._backpressure) { + // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure() + // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time + // _backpressure is set. + TransformStreamSetBackpressure(stream, false); + } + } + function TransformStreamSetBackpressure(stream, backpressure) { + // Passes also when called during construction. + if (stream._backpressureChangePromise !== undefined) { + stream._backpressureChangePromise_resolve(); + } + stream._backpressureChangePromise = newPromise(function (resolve) { + stream._backpressureChangePromise_resolve = resolve; + }); + stream._backpressure = backpressure; + } + // Class TransformStreamDefaultController + /** + * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}. + * + * @public + */ + var TransformStreamDefaultController = /** @class */ (function () { + function TransformStreamDefaultController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(TransformStreamDefaultController.prototype, "desiredSize", { + /** + * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full. + */ + get: function () { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('desiredSize'); + } + var readableController = this._controlledTransformStream._readable._readableStreamController; + return ReadableStreamDefaultControllerGetDesiredSize(readableController); + }, + enumerable: false, + configurable: true + }); + TransformStreamDefaultController.prototype.enqueue = function (chunk) { + if (chunk === void 0) { chunk = undefined; } + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('enqueue'); + } + TransformStreamDefaultControllerEnqueue(this, chunk); + }; + /** + * Errors both the readable side and the writable side of the controlled transform stream, making all future + * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded. + */ + TransformStreamDefaultController.prototype.error = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('error'); + } + TransformStreamDefaultControllerError(this, reason); + }; + /** + * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the + * transformer only needs to consume a portion of the chunks written to the writable side. + */ + TransformStreamDefaultController.prototype.terminate = function () { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('terminate'); + } + TransformStreamDefaultControllerTerminate(this); + }; + return TransformStreamDefaultController; + }()); + Object.defineProperties(TransformStreamDefaultController.prototype, { + enqueue: { enumerable: true }, + error: { enumerable: true }, + terminate: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue'); + setFunctionName(TransformStreamDefaultController.prototype.error, 'error'); + setFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(TransformStreamDefaultController.prototype, SymbolPolyfill.toStringTag, { + value: 'TransformStreamDefaultController', + configurable: true + }); + } + // Transform Stream Default Controller Abstract Operations + function IsTransformStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) { + return false; + } + return x instanceof TransformStreamDefaultController; + } + function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm) { + controller._controlledTransformStream = stream; + stream._transformStreamController = controller; + controller._transformAlgorithm = transformAlgorithm; + controller._flushAlgorithm = flushAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._finishPromise = undefined; + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) { + var controller = Object.create(TransformStreamDefaultController.prototype); + var transformAlgorithm; + var flushAlgorithm; + var cancelAlgorithm; + if (transformer.transform !== undefined) { + transformAlgorithm = function (chunk) { return transformer.transform(chunk, controller); }; + } + else { + transformAlgorithm = function (chunk) { + try { + TransformStreamDefaultControllerEnqueue(controller, chunk); + return promiseResolvedWith(undefined); + } + catch (transformResultE) { + return promiseRejectedWith(transformResultE); + } + }; + } + if (transformer.flush !== undefined) { + flushAlgorithm = function () { return transformer.flush(controller); }; + } + else { + flushAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (transformer.cancel !== undefined) { + cancelAlgorithm = function (reason) { return transformer.cancel(reason); }; + } + else { + cancelAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm); + } + function TransformStreamDefaultControllerClearAlgorithms(controller) { + controller._transformAlgorithm = undefined; + controller._flushAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + } + function TransformStreamDefaultControllerEnqueue(controller, chunk) { + var stream = controller._controlledTransformStream; + var readableController = stream._readable._readableStreamController; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) { + throw new TypeError('Readable side is not in a state that permits enqueue'); + } + // We throttle transform invocations based on the backpressure of the ReadableStream, but we still + // accept TransformStreamDefaultControllerEnqueue() calls. + try { + ReadableStreamDefaultControllerEnqueue(readableController, chunk); + } + catch (e) { + // This happens when readableStrategy.size() throws. + TransformStreamErrorWritableAndUnblockWrite(stream, e); + throw stream._readable._storedError; + } + var backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController); + if (backpressure !== stream._backpressure) { + TransformStreamSetBackpressure(stream, true); + } + } + function TransformStreamDefaultControllerError(controller, e) { + TransformStreamError(controller._controlledTransformStream, e); + } + function TransformStreamDefaultControllerPerformTransform(controller, chunk) { + var transformPromise = controller._transformAlgorithm(chunk); + return transformPromiseWith(transformPromise, undefined, function (r) { + TransformStreamError(controller._controlledTransformStream, r); + throw r; + }); + } + function TransformStreamDefaultControllerTerminate(controller) { + var stream = controller._controlledTransformStream; + var readableController = stream._readable._readableStreamController; + ReadableStreamDefaultControllerClose(readableController); + var error = new TypeError('TransformStream terminated'); + TransformStreamErrorWritableAndUnblockWrite(stream, error); + } + // TransformStreamDefaultSink Algorithms + function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) { + var controller = stream._transformStreamController; + if (stream._backpressure) { + var backpressureChangePromise = stream._backpressureChangePromise; + return transformPromiseWith(backpressureChangePromise, function () { + var writable = stream._writable; + var state = writable._state; + if (state === 'erroring') { + throw writable._storedError; + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + }); + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + } + function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) { + var controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + var readable = stream._readable; + // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally, + // we don't run the _cancelAlgorithm again. + controller._finishPromise = newPromise(function (resolve, reject) { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + var cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, function () { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerError(readable._readableStreamController, reason); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, function (r) { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + function TransformStreamDefaultSinkCloseAlgorithm(stream) { + var controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + var readable = stream._readable; + // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally, + // we don't also run the _cancelAlgorithm. + controller._finishPromise = newPromise(function (resolve, reject) { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + var flushPromise = controller._flushAlgorithm(); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(flushPromise, function () { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerClose(readable._readableStreamController); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, function (r) { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + // TransformStreamDefaultSource Algorithms + function TransformStreamDefaultSourcePullAlgorithm(stream) { + // Invariant. Enforced by the promises returned by start() and pull(). + TransformStreamSetBackpressure(stream, false); + // Prevent the next pull() call until there is backpressure. + return stream._backpressureChangePromise; + } + function TransformStreamDefaultSourceCancelAlgorithm(stream, reason) { + var controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._writable cannot change after construction, so caching it across a call to user code is safe. + var writable = stream._writable; + // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or + // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the + // _flushAlgorithm. + controller._finishPromise = newPromise(function (resolve, reject) { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + var cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, function () { + if (writable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, writable._storedError); + } + else { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, function (r) { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + // Helper functions for the TransformStreamDefaultController. + function defaultControllerBrandCheckException(name) { + return new TypeError("TransformStreamDefaultController.prototype.".concat(name, " can only be used on a TransformStreamDefaultController")); + } + function defaultControllerFinishPromiseResolve(controller) { + if (controller._finishPromise_resolve === undefined) { + return; + } + controller._finishPromise_resolve(); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + function defaultControllerFinishPromiseReject(controller, reason) { + if (controller._finishPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(controller._finishPromise); + controller._finishPromise_reject(reason); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + // Helper functions for the TransformStream. + function streamBrandCheckException(name) { + return new TypeError("TransformStream.prototype.".concat(name, " can only be used on a TransformStream")); + } + + var exports$1 = { + ReadableStream: ReadableStream, + ReadableStreamDefaultController: ReadableStreamDefaultController, + ReadableByteStreamController: ReadableByteStreamController, + ReadableStreamBYOBRequest: ReadableStreamBYOBRequest, + ReadableStreamDefaultReader: ReadableStreamDefaultReader, + ReadableStreamBYOBReader: ReadableStreamBYOBReader, + WritableStream: WritableStream, + WritableStreamDefaultController: WritableStreamDefaultController, + WritableStreamDefaultWriter: WritableStreamDefaultWriter, + ByteLengthQueuingStrategy: ByteLengthQueuingStrategy, + CountQueuingStrategy: CountQueuingStrategy, + TransformStream: TransformStream, + TransformStreamDefaultController: TransformStreamDefaultController + }; + // Add classes to global scope + if (typeof globals !== 'undefined') { + for (var prop in exports$1) { + if (Object.prototype.hasOwnProperty.call(exports$1, prop)) { + Object.defineProperty(globals, prop, { + value: exports$1[prop], + writable: true, + configurable: true + }); + } + } + } + + exports.ByteLengthQueuingStrategy = ByteLengthQueuingStrategy; + exports.CountQueuingStrategy = CountQueuingStrategy; + exports.ReadableByteStreamController = ReadableByteStreamController; + exports.ReadableStream = ReadableStream; + exports.ReadableStreamBYOBReader = ReadableStreamBYOBReader; + exports.ReadableStreamBYOBRequest = ReadableStreamBYOBRequest; + exports.ReadableStreamDefaultController = ReadableStreamDefaultController; + exports.ReadableStreamDefaultReader = ReadableStreamDefaultReader; + exports.TransformStream = TransformStream; + exports.TransformStreamDefaultController = TransformStreamDefaultController; + exports.WritableStream = WritableStream; + exports.WritableStreamDefaultController = WritableStreamDefaultController; + exports.WritableStreamDefaultWriter = WritableStreamDefaultWriter; + +})); +//# sourceMappingURL=polyfill.js.map diff --git a/node_modules/web-streams-polyfill/dist/polyfill.js.map b/node_modules/web-streams-polyfill/dist/polyfill.js.map new file mode 100644 index 00000000..d4aaa737 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/polyfill.js.map @@ -0,0 +1 @@ +{"version":3,"file":"polyfill.js","sources":["../src/stub/symbol.ts","../node_modules/tslib/tslib.es6.js","../src/utils.ts","../src/lib/helpers/miscellaneous.ts","../src/lib/helpers/webidl.ts","../src/lib/simple-queue.ts","../src/lib/abstract-ops/internal-methods.ts","../src/lib/readable-stream/generic-reader.ts","../src/stub/number-isfinite.ts","../src/stub/math-trunc.ts","../src/lib/validators/basic.ts","../src/lib/validators/readable-stream.ts","../src/lib/readable-stream/default-reader.ts","../src/lib/abstract-ops/ecmascript.ts","../src/target/es5/stub/async-iterator-prototype.ts","../src/lib/readable-stream/async-iterator.ts","../src/stub/number-isnan.ts","../src/lib/abstract-ops/miscellaneous.ts","../src/lib/abstract-ops/queue-with-sizes.ts","../src/lib/helpers/array-buffer-view.ts","../src/lib/readable-stream/byte-stream-controller.ts","../src/lib/validators/reader-options.ts","../src/lib/readable-stream/byob-reader.ts","../src/lib/abstract-ops/queuing-strategy.ts","../src/lib/validators/queuing-strategy.ts","../src/lib/validators/underlying-sink.ts","../src/lib/validators/writable-stream.ts","../src/lib/abort-signal.ts","../src/lib/writable-stream.ts","../src/globals.ts","../src/stub/dom-exception.ts","../src/lib/readable-stream/pipe.ts","../src/lib/readable-stream/default-controller.ts","../src/lib/readable-stream/tee.ts","../src/lib/readable-stream/readable-stream-like.ts","../src/lib/readable-stream/from.ts","../src/lib/validators/underlying-source.ts","../src/lib/validators/iterator-options.ts","../src/lib/validators/pipe-options.ts","../src/lib/validators/readable-writable-pair.ts","../src/lib/readable-stream.ts","../src/lib/validators/queuing-strategy-init.ts","../src/lib/byte-length-queuing-strategy.ts","../src/lib/count-queuing-strategy.ts","../src/lib/validators/transformer.ts","../src/lib/transform-stream.ts","../src/polyfill.ts"],"sourcesContent":["/// \n\nconst SymbolPolyfill: (description?: string) => symbol =\n typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ?\n Symbol :\n description => `Symbol(${description})` as any as symbol;\n\nexport default SymbolPolyfill;\n","/******************************************************************************\r\nCopyright (c) Microsoft Corporation.\r\n\r\nPermission to use, copy, modify, and/or distribute this software for any\r\npurpose with or without fee is hereby granted.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\r\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY\r\nAND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\r\n***************************************************************************** */\r\n/* global Reflect, Promise, SuppressedError, Symbol */\r\n\r\nvar extendStatics = function(d, b) {\r\n extendStatics = Object.setPrototypeOf ||\r\n ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\r\n return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n if (typeof b !== \"function\" && b !== null)\r\n throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\r\n extendStatics(d, b);\r\n function __() { this.constructor = d; }\r\n d.prototype = b === null ? 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(this.v = v, this) : new __await(v);\r\n}\r\n\r\nexport function __asyncGenerator(thisArg, _arguments, generator) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var g = generator.apply(thisArg, _arguments || []), i, q = [];\r\n return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\r\n function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\r\n function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\r\n function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n function fulfill(value) { resume(\"next\", value); }\r\n function reject(value) { resume(\"throw\", value); }\r\n function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n var i, p;\r\n return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var m = o[Symbol.asyncIterator], i;\r\n return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n return cooked;\r\n};\r\n\r\nvar __setModuleDefault = Object.create ? (function(o, v) {\r\n Object.defineProperty(o, \"default\", { enumerable: true, value: v });\r\n}) : function(o, v) {\r\n o[\"default\"] = v;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n if (mod && mod.__esModule) return mod;\r\n var result = {};\r\n if (mod != null) for (var k in mod) if (k !== \"default\" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);\r\n __setModuleDefault(result, mod);\r\n return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n\r\nexport function __classPrivateFieldGet(receiver, state, kind, f) {\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a getter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot read private member from an object whose class did not declare it\");\r\n return kind === \"m\" ? f : kind === \"a\" ? f.call(receiver) : f ? f.value : state.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, state, value, kind, f) {\r\n if (kind === \"m\") throw new TypeError(\"Private method is not writable\");\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a setter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot write private member to an object whose class did not declare it\");\r\n return (kind === \"a\" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;\r\n}\r\n\r\nexport function __classPrivateFieldIn(state, receiver) {\r\n if (receiver === null || (typeof receiver !== \"object\" && typeof receiver !== \"function\")) throw new TypeError(\"Cannot use 'in' operator on non-object\");\r\n return typeof state === \"function\" ? receiver === state : state.has(receiver);\r\n}\r\n\r\nexport function __addDisposableResource(env, value, async) {\r\n if (value !== null && value !== void 0) {\r\n if (typeof value !== \"object\" && typeof value !== \"function\") throw new TypeError(\"Object expected.\");\r\n var dispose;\r\n if (async) {\r\n if (!Symbol.asyncDispose) throw new TypeError(\"Symbol.asyncDispose is not defined.\");\r\n dispose = value[Symbol.asyncDispose];\r\n }\r\n if (dispose === void 0) {\r\n if (!Symbol.dispose) throw new TypeError(\"Symbol.dispose is not defined.\");\r\n dispose = value[Symbol.dispose];\r\n }\r\n if (typeof dispose !== \"function\") throw new TypeError(\"Object not disposable.\");\r\n env.stack.push({ value: value, dispose: dispose, async: async });\r\n }\r\n else if (async) {\r\n env.stack.push({ async: true });\r\n }\r\n return value;\r\n}\r\n\r\nvar _SuppressedError = typeof SuppressedError === \"function\" ? SuppressedError : function (error, suppressed, message) {\r\n var e = new Error(message);\r\n return e.name = \"SuppressedError\", e.error = error, e.suppressed = suppressed, e;\r\n};\r\n\r\nexport function __disposeResources(env) {\r\n function fail(e) {\r\n env.error = env.hasError ? new _SuppressedError(e, env.error, \"An error was suppressed during disposal.\") : e;\r\n env.hasError = true;\r\n }\r\n function next() {\r\n while (env.stack.length) {\r\n var rec = env.stack.pop();\r\n try {\r\n var result = rec.dispose && rec.dispose.call(rec.value);\r\n if (rec.async) return Promise.resolve(result).then(next, function(e) { fail(e); return next(); });\r\n }\r\n catch (e) {\r\n fail(e);\r\n }\r\n }\r\n if (env.hasError) throw env.error;\r\n }\r\n return next();\r\n}\r\n\r\nexport default {\r\n __extends: __extends,\r\n __assign: __assign,\r\n __rest: __rest,\r\n __decorate: __decorate,\r\n __param: __param,\r\n __metadata: __metadata,\r\n __awaiter: __awaiter,\r\n __generator: __generator,\r\n __createBinding: __createBinding,\r\n __exportStar: __exportStar,\r\n __values: __values,\r\n __read: __read,\r\n __spread: __spread,\r\n __spreadArrays: __spreadArrays,\r\n __spreadArray: __spreadArray,\r\n __await: __await,\r\n __asyncGenerator: __asyncGenerator,\r\n __asyncDelegator: __asyncDelegator,\r\n __asyncValues: __asyncValues,\r\n __makeTemplateObject: __makeTemplateObject,\r\n __importStar: __importStar,\r\n __importDefault: __importDefault,\r\n __classPrivateFieldGet: __classPrivateFieldGet,\r\n __classPrivateFieldSet: __classPrivateFieldSet,\r\n __classPrivateFieldIn: __classPrivateFieldIn,\r\n __addDisposableResource: __addDisposableResource,\r\n __disposeResources: __disposeResources,\r\n};\r\n","export function noop(): undefined {\n return undefined;\n}\n","import { noop } from '../../utils';\nimport { AssertionError } from '../../stub/assert';\n\nexport function typeIsObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport const rethrowAssertionErrorRejection: (e: any) => void =\n DEBUG ? e => {\n // Used throughout the reference implementation, as `.catch(rethrowAssertionErrorRejection)`, to ensure any errors\n // get shown. There are places in the spec where we do promise transformations and purposefully ignore or don't\n // expect any errors, but assertion errors are always problematic.\n if (e && e instanceof AssertionError) {\n setTimeout(() => {\n throw e;\n }, 0);\n }\n } : noop;\n\nexport function setFunctionName(fn: Function, name: string): void {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n } catch {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n}\n","import { rethrowAssertionErrorRejection } from './miscellaneous';\nimport assert from '../../stub/assert';\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\n\n// https://webidl.spec.whatwg.org/#a-new-promise\nexport function newPromise(executor: (\n resolve: (value: T | PromiseLike) => void,\n reject: (reason?: any) => void\n) => void): Promise {\n return new originalPromise(executor);\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-resolved-with\nexport function promiseResolvedWith(value: T | PromiseLike): Promise {\n return newPromise(resolve => resolve(value));\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-rejected-with\nexport function promiseRejectedWith(reason: any): Promise {\n return originalPromiseReject(reason);\n}\n\nexport function PerformPromiseThen(\n promise: Promise,\n onFulfilled?: (value: T) => TResult1 | PromiseLike,\n onRejected?: (reason: any) => TResult2 | PromiseLike): Promise {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected) as Promise;\n}\n\n// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n// from that handler. To prevent this, return null instead of void from all handlers.\n// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\nexport function uponPromise(\n promise: Promise,\n onFulfilled?: (value: T) => null | PromiseLike,\n onRejected?: (reason: any) => null | PromiseLike): void {\n PerformPromiseThen(\n PerformPromiseThen(promise, onFulfilled, onRejected),\n undefined,\n rethrowAssertionErrorRejection\n );\n}\n\nexport function uponFulfillment(promise: Promise, onFulfilled: (value: T) => null | PromiseLike): void {\n uponPromise(promise, onFulfilled);\n}\n\nexport function uponRejection(promise: Promise, onRejected: (reason: any) => null | PromiseLike): void {\n uponPromise(promise, undefined, onRejected);\n}\n\nexport function transformPromiseWith(\n promise: Promise,\n fulfillmentHandler?: (value: T) => TResult1 | PromiseLike,\n rejectionHandler?: (reason: any) => TResult2 | PromiseLike): Promise {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\n\nexport function setPromiseIsHandledToTrue(promise: Promise): void {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\nlet _queueMicrotask: (callback: () => void) => void = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n } else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n};\n\nexport { _queueMicrotask as queueMicrotask };\n\nexport function reflectCall(F: (this: T, ...fnArgs: A) => R, V: T, args: A): R {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n}\n\nexport function promiseCall(F: (this: T, ...fnArgs: A) => R | PromiseLike,\n V: T,\n args: A): Promise {\n assert(typeof F === 'function');\n assert(V !== undefined);\n assert(Array.isArray(args));\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n } catch (value) {\n return promiseRejectedWith(value);\n }\n}\n","import assert from '../stub/assert';\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n\ninterface Node {\n _elements: T[];\n _next: Node | undefined;\n}\n\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nexport class SimpleQueue {\n private _front: Node;\n private _back: Node;\n private _cursor = 0;\n private _size = 0;\n\n constructor() {\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n\n get length(): number {\n return this._size;\n }\n\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element: T): void {\n const oldBack = this._back;\n let newBack = oldBack;\n assert(oldBack._next === undefined);\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n assert(elements.length === QUEUE_MAX_ARRAY_SIZE);\n assert(oldFront._next !== undefined);\n newFront = oldFront._next!;\n newCursor = 0;\n }\n\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined!;\n\n return element;\n }\n\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback: (element: T) => void): void {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n assert(node._next !== undefined);\n assert(i === QUEUE_MAX_ARRAY_SIZE);\n node = node._next!;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n}\n","export const AbortSteps = Symbol('[[AbortSteps]]');\nexport const ErrorSteps = Symbol('[[ErrorSteps]]');\nexport const CancelSteps = Symbol('[[CancelSteps]]');\nexport const PullSteps = Symbol('[[PullSteps]]');\nexport const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n","import assert from '../../stub/assert';\nimport { ReadableStream, ReadableStreamCancel, type ReadableStreamReader } from '../readable-stream';\nimport { newPromise, setPromiseIsHandledToTrue } from '../helpers/webidl';\nimport { ReleaseSteps } from '../abstract-ops/internal-methods';\n\nexport function ReadableStreamReaderGenericInitialize(reader: ReadableStreamReader, stream: ReadableStream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n } else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n } else {\n assert(stream._state === 'errored');\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n}\n\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\n\nexport function ReadableStreamReaderGenericCancel(reader: ReadableStreamReader, reason: any): Promise {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n return ReadableStreamCancel(stream, reason);\n}\n\nexport function ReadableStreamReaderGenericRelease(reader: ReadableStreamReader) {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n assert(stream._reader === reader);\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n } else {\n defaultReaderClosedPromiseResetToRejected(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n\n stream._readableStreamController[ReleaseSteps]();\n\n stream._reader = undefined;\n reader._ownerReadableStream = undefined!;\n}\n\n// Helper functions for the readers.\n\nexport function readerLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nexport function defaultReaderClosedPromiseInitialize(reader: ReadableStreamReader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n}\n\nexport function defaultReaderClosedPromiseInitializeAsRejected(reader: ReadableStreamReader, reason: any) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseInitializeAsResolved(reader: ReadableStreamReader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n}\n\nexport function defaultReaderClosedPromiseReject(reader: ReadableStreamReader, reason: any) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n\nexport function defaultReaderClosedPromiseResetToRejected(reader: ReadableStreamReader, reason: any) {\n assert(reader._closedPromise_resolve === undefined);\n assert(reader._closedPromise_reject === undefined);\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseResolve(reader: ReadableStreamReader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite: typeof Number.isFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n};\n\nexport default NumberIsFinite;\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc: typeof Math.trunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\nexport default MathTrunc;\n","import NumberIsFinite from '../../stub/number-isfinite';\nimport MathTrunc from '../../stub/math-trunc';\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nexport function isDictionary(x: any): x is object | null {\n return typeof x === 'object' || typeof x === 'function';\n}\n\nexport function assertDictionary(obj: unknown,\n context: string): asserts obj is object | null | undefined {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport type AnyFunction = (...args: any[]) => any;\n\n// https://heycam.github.io/webidl/#idl-callback-functions\nexport function assertFunction(x: unknown, context: string): asserts x is AnyFunction {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-object\nexport function isObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport function assertObject(x: unknown,\n context: string): asserts x is object {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport function assertRequiredArgument(x: T | undefined,\n position: number,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n}\n\nexport function assertRequiredField(x: T | undefined,\n field: string,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nexport function convertUnrestrictedDouble(value: unknown): number {\n return Number(value);\n}\n\nfunction censorNegativeZero(x: number): number {\n return x === 0 ? 0 : x;\n}\n\nfunction integerPart(x: number): number {\n return censorNegativeZero(MathTrunc(x));\n}\n\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nexport function convertUnsignedLongLongWithEnforceRange(value: unknown, context: string): number {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n\n let x = Number(value);\n x = censorNegativeZero(x);\n\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n\n x = integerPart(x);\n\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n\n return x;\n}\n","import { IsReadableStream, ReadableStream } from '../readable-stream';\n\nexport function assertReadableStream(x: unknown, context: string): asserts x is ReadableStream {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, ReadableStream } from '../readable-stream';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { PullSteps } from '../abstract-ops/internal-methods';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\n\n/**\n * A result returned by {@link ReadableStreamDefaultReader.read}.\n *\n * @public\n */\nexport type ReadableStreamDefaultReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value?: undefined;\n}\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamDefaultReader(stream: ReadableStream): ReadableStreamDefaultReader {\n return new ReadableStreamDefaultReader(stream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadRequest(stream: ReadableStream,\n readRequest: ReadRequest): void {\n assert(IsReadableStreamDefaultReader(stream._reader));\n assert(stream._state === 'readable');\n\n (stream._reader! as ReadableStreamDefaultReader)._readRequests.push(readRequest);\n}\n\nexport function ReadableStreamFulfillReadRequest(stream: ReadableStream, chunk: R | undefined, done: boolean) {\n const reader = stream._reader as ReadableStreamDefaultReader;\n\n assert(reader._readRequests.length > 0);\n\n const readRequest = reader._readRequests.shift()!;\n if (done) {\n readRequest._closeSteps();\n } else {\n readRequest._chunkSteps(chunk!);\n }\n}\n\nexport function ReadableStreamGetNumReadRequests(stream: ReadableStream): number {\n return (stream._reader as ReadableStreamDefaultReader)._readRequests.length;\n}\n\nexport function ReadableStreamHasDefaultReader(stream: ReadableStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadRequest {\n _chunkSteps(chunk: R): void;\n\n _closeSteps(): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamDefaultReader {\n /** @internal */\n _ownerReadableStream!: ReadableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(): Promise> {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamDefaultReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamDefaultReader(x: any): x is ReadableStreamDefaultReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultReader;\n}\n\nexport function ReadableStreamDefaultReaderRead(reader: ReadableStreamDefaultReader,\n readRequest: ReadRequest): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n } else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n } else {\n assert(stream._state === 'readable');\n stream._readableStreamController[PullSteps](readRequest as ReadRequest);\n }\n}\n\nexport function ReadableStreamDefaultReaderRelease(reader: ReadableStreamDefaultReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n}\n\nexport function ReadableStreamDefaultReaderErrorReadRequests(reader: ReadableStreamDefaultReader, e: any) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nfunction defaultReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n","import { reflectCall } from 'lib/helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport assert from '../../stub/assert';\n\ndeclare global {\n interface ArrayBuffer {\n readonly detached: boolean;\n\n transfer(): ArrayBuffer;\n }\n\n function structuredClone(value: T, options: { transfer: ArrayBuffer[] }): T;\n}\n\nexport function CreateArrayFromList(elements: T): T {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice() as T;\n}\n\nexport function CopyDataBlockBytes(dest: ArrayBuffer,\n destOffset: number,\n src: ArrayBuffer,\n srcOffset: number,\n n: number) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n\nexport let TransferArrayBuffer = (O: ArrayBuffer): ArrayBuffer => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n } else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n } else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n};\n\nexport function CanTransferArrayBuffer(O: ArrayBuffer): boolean {\n return !IsDetachedBuffer(O);\n}\n\nexport let IsDetachedBuffer = (O: ArrayBuffer): boolean => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n } else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n};\n\nexport function ArrayBufferSlice(buffer: ArrayBuffer, begin: number, end: number): ArrayBuffer {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n}\n\nexport type MethodName = {\n [P in keyof T]: T[P] extends Function | undefined ? P : never;\n}[keyof T];\n\nexport function GetMethod>(receiver: T, prop: K): T[K] | undefined {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n}\n\nexport interface SyncIteratorRecord {\n iterator: Iterator,\n nextMethod: Iterator['next'],\n done: boolean;\n}\n\nexport interface AsyncIteratorRecord {\n iterator: AsyncIterator,\n nextMethod: AsyncIterator['next'],\n done: boolean;\n}\n\nexport type SyncOrAsyncIteratorRecord = SyncIteratorRecord | AsyncIteratorRecord;\n\nexport function CreateAsyncFromSyncIterator(syncIteratorRecord: SyncIteratorRecord): AsyncIteratorRecord {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n}\n\n// Aligns with core-js/modules/es.symbol.async-iterator.js\nexport const SymbolAsyncIterator: (typeof Symbol)['asyncIterator'] =\n Symbol.asyncIterator ??\n Symbol.for?.('Symbol.asyncIterator') ??\n '@@asyncIterator';\n\nexport type SyncOrAsyncIterable = Iterable | AsyncIterable;\nexport type SyncOrAsyncIteratorMethod = () => (Iterator | AsyncIterator);\n\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint: 'async',\n method?: SyncOrAsyncIteratorMethod\n): AsyncIteratorRecord;\nfunction GetIterator(\n obj: Iterable,\n hint: 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncIteratorRecord;\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint = 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncOrAsyncIteratorRecord {\n assert(hint === 'sync' || hint === 'async');\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj as AsyncIterable, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj as Iterable, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj as Iterable, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n } else {\n method = GetMethod(obj as Iterable, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false } as SyncOrAsyncIteratorRecord;\n}\n\nexport { GetIterator };\n\nexport function IteratorNext(iteratorRecord: AsyncIteratorRecord): Promise> {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n}\n\nexport function IteratorComplete(\n iterResult: IteratorResult\n): iterResult is IteratorReturnResult {\n assert(typeIsObject(iterResult));\n return Boolean(iterResult.done);\n}\n\nexport function IteratorValue(iterResult: IteratorYieldResult): T {\n assert(typeIsObject(iterResult));\n return iterResult.value;\n}\n","/// \n\nimport { SymbolAsyncIterator } from '../../../lib/abstract-ops/ecmascript';\n\n// We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it.\nexport const AsyncIteratorPrototype: AsyncIterable = {\n // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( )\n // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator\n [SymbolAsyncIterator](this: AsyncIterator) {\n return this;\n }\n};\nObject.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false });\n","/// \n\nimport { ReadableStream } from '../readable-stream';\nimport {\n AcquireReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadableStreamDefaultReadResult,\n type ReadRequest\n} from './default-reader';\nimport { ReadableStreamReaderGenericCancel, ReadableStreamReaderGenericRelease } from './generic-reader';\nimport assert from '../../stub/assert';\nimport { AsyncIteratorPrototype } from '@@target/stub/async-iterator-prototype';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n queueMicrotask,\n transformPromiseWith\n} from '../helpers/webidl';\n\n/**\n * An async iterator returned by {@link ReadableStream.values}.\n *\n * @public\n */\nexport interface ReadableStreamAsyncIterator extends AsyncIterableIterator {\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nexport class ReadableStreamAsyncIteratorImpl {\n private readonly _reader: ReadableStreamDefaultReader;\n private readonly _preventCancel: boolean;\n private _ongoingPromise: Promise> | undefined = undefined;\n private _isFinished = false;\n\n constructor(reader: ReadableStreamDefaultReader, preventCancel: boolean) {\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n\n next(): Promise> {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n\n return(value: any): Promise> {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n\n private _nextSteps(): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n\n private _returnSteps(value: any): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n assert(reader._readRequests.length === 0);\n\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n}\n\ninterface ReadableStreamAsyncIteratorInstance extends ReadableStreamAsyncIterator {\n /** @interal */\n _asyncIteratorImpl: ReadableStreamAsyncIteratorImpl;\n\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nconst ReadableStreamAsyncIteratorPrototype: ReadableStreamAsyncIteratorInstance = {\n next(this: ReadableStreamAsyncIteratorInstance): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n\n return(this: ReadableStreamAsyncIteratorInstance, value: any): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n} as any;\nObject.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamAsyncIterator(stream: ReadableStream,\n preventCancel: boolean): ReadableStreamAsyncIterator {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator: ReadableStreamAsyncIteratorInstance = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n}\n\nfunction IsReadableStreamAsyncIterator(x: any): x is ReadableStreamAsyncIterator {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n\n try {\n // noinspection SuspiciousTypeOfGuard\n return (x as ReadableStreamAsyncIteratorInstance)._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n } catch {\n return false;\n }\n}\n\n// Helper functions for the ReadableStream.\n\nfunction streamAsyncIteratorBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN: typeof Number.isNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n};\n\nexport default NumberIsNaN;\n","import NumberIsNaN from '../../stub/number-isnan';\nimport { ArrayBufferSlice } from './ecmascript';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function IsNonNegativeNumber(v: number): boolean {\n if (typeof v !== 'number') {\n return false;\n }\n\n if (NumberIsNaN(v)) {\n return false;\n }\n\n if (v < 0) {\n return false;\n }\n\n return true;\n}\n\nexport function CloneAsUint8Array(O: NonShared): NonShared {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer) as NonShared;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsNonNegativeNumber } from './miscellaneous';\n\nexport interface QueueContainer {\n _queue: SimpleQueue;\n _queueTotalSize: number;\n}\n\nexport interface QueuePair {\n value: T;\n size: number;\n}\n\nexport function DequeueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.shift()!;\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n\n return pair.value;\n}\n\nexport function EnqueueValueWithSize(container: QueueContainer>, value: T, size: number) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n}\n\nexport function PeekQueueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.peek();\n return pair.value;\n}\n\nexport function ResetQueue(container: QueueContainer) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n}\n","export type TypedArray =\n | Int8Array\n | Uint8Array\n | Uint8ClampedArray\n | Int16Array\n | Uint16Array\n | Int32Array\n | Uint32Array\n | Float32Array\n | Float64Array;\n\nexport type NonShared = T & {\n buffer: ArrayBuffer;\n}\n\nexport interface ArrayBufferViewConstructor {\n new(buffer: ArrayBuffer, byteOffset: number, length?: number): T;\n\n readonly prototype: T;\n}\n\nexport interface TypedArrayConstructor extends ArrayBufferViewConstructor {\n readonly BYTES_PER_ELEMENT: number;\n}\n\nexport type DataViewConstructor = ArrayBufferViewConstructor;\n\nfunction isDataViewConstructor(ctor: Function): ctor is DataViewConstructor {\n return ctor === DataView;\n}\n\nexport function isDataView(view: ArrayBufferView): view is DataView {\n return isDataViewConstructor(view.constructor);\n}\n\nexport function arrayBufferViewElementSize(ctor: ArrayBufferViewConstructor): number {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return (ctor as unknown as TypedArrayConstructor).BYTES_PER_ELEMENT;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n IsReadableStreamDefaultReader,\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n ReadableStreamHasDefaultReader,\n type ReadRequest\n} from './default-reader';\nimport {\n ReadableStreamAddReadIntoRequest,\n ReadableStreamFulfillReadIntoRequest,\n ReadableStreamGetNumReadIntoRequests,\n ReadableStreamHasBYOBReader,\n type ReadIntoRequest\n} from './byob-reader';\nimport NumberIsInteger from '../../stub/number-isinteger';\nimport {\n IsReadableStreamLocked,\n type ReadableByteStream,\n ReadableStreamClose,\n ReadableStreamError\n} from '../readable-stream';\nimport type { ValidatedUnderlyingByteSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport {\n ArrayBufferSlice,\n CanTransferArrayBuffer,\n CopyDataBlockBytes,\n IsDetachedBuffer,\n TransferArrayBuffer\n} from '../abstract-ops/ecmascript';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\nimport { assertRequiredArgument, convertUnsignedLongLongWithEnforceRange } from '../validators/basic';\nimport {\n type ArrayBufferViewConstructor,\n arrayBufferViewElementSize,\n type NonShared,\n type TypedArrayConstructor\n} from '../helpers/array-buffer-view';\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nexport class ReadableStreamBYOBRequest {\n /** @internal */\n _associatedReadableByteStreamController!: ReadableByteStreamController;\n /** @internal */\n _view!: NonShared | null;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view(): ArrayBufferView | null {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n\n return this._view;\n }\n\n /**\n * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into\n * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer.\n *\n * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer\n * modifiable.\n */\n respond(bytesWritten: number): void;\n respond(bytesWritten: number | undefined): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(this._view!.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n\n assert(this._view!.byteLength > 0);\n assert(this._view!.buffer.byteLength > 0);\n\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n\n /**\n * Indicates to the associated readable byte stream that instead of writing into\n * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`,\n * which will be given to the consumer of the readable byte stream.\n *\n * After this method is called, `view` will be transferred and no longer modifiable.\n */\n respondWithNewView(view: ArrayBufferView): void;\n respondWithNewView(view: NonShared): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n}\n\ninterface ByteQueueElement {\n buffer: ArrayBuffer;\n byteOffset: number;\n byteLength: number;\n}\n\ntype PullIntoDescriptor = NonShared> =\n DefaultPullIntoDescriptor\n | BYOBPullIntoDescriptor;\n\ninterface DefaultPullIntoDescriptor {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: TypedArrayConstructor;\n readerType: 'default' | 'none';\n}\n\ninterface BYOBPullIntoDescriptor = NonShared> {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: ArrayBufferViewConstructor;\n readerType: 'byob' | 'none';\n}\n\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableByteStreamController {\n /** @internal */\n _controlledReadableByteStream!: ReadableByteStream;\n /** @internal */\n _queue!: SimpleQueue;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n /** @internal */\n _autoAllocateChunkSize: number | undefined;\n /** @internal */\n _byobRequest: ReadableStreamBYOBRequest | null;\n /** @internal */\n _pendingPullIntos!: SimpleQueue;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest(): ReadableStreamBYOBRequest | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n\n ReadableByteStreamControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk chunk in the controlled readable stream.\n * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown.\n */\n enqueue(chunk: ArrayBufferView): void;\n enqueue(chunk: NonShared): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n\n ReadableByteStreamControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n\n ResetQueue(this);\n\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest>): void {\n const stream = this._controlledReadableByteStream;\n assert(ReadableStreamHasDefaultReader(stream));\n\n if (this._queueTotalSize > 0) {\n assert(ReadableStreamGetNumReadRequests(stream) === 0);\n\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer: ArrayBuffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n } catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n\n const pullIntoDescriptor: DefaultPullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n}\n\nObject.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableByteStreamController.prototype.close, 'close');\nsetFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableByteStreamController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableByteStreamController.\n\nexport function IsReadableByteStreamController(x: any): x is ReadableByteStreamController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n\n return x instanceof ReadableByteStreamController;\n}\n\nfunction IsReadableStreamBYOBRequest(x: any): x is ReadableStreamBYOBRequest {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBRequest;\n}\n\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller: ReadableByteStreamController): void {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller: ReadableByteStreamController) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n}\n\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor>(\n stream: ReadableByteStream,\n pullIntoDescriptor: PullIntoDescriptor\n) {\n assert(stream._state !== 'errored');\n assert(pullIntoDescriptor.readerType !== 'none');\n\n let done = false;\n if (stream._state === 'closed') {\n assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);\n done = true;\n }\n\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView as unknown as NonShared, done);\n } else {\n assert(pullIntoDescriptor.readerType === 'byob');\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n}\n\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor>(\n pullIntoDescriptor: PullIntoDescriptor\n): T {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n\n assert(bytesFilled <= pullIntoDescriptor.byteLength);\n assert(bytesFilled % elementSize === 0);\n\n return new pullIntoDescriptor.viewConstructor(\n pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize) as T;\n}\n\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n}\n\nfunction ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n } catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n}\n\nfunction ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.readerType === 'none');\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n firstDescriptor.buffer,\n firstDescriptor.byteOffset,\n firstDescriptor.bytesFilled\n );\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n}\n\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller: ReadableByteStreamController,\n pullIntoDescriptor: PullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize,\n pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n\n const queue = controller._queue;\n\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n } else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n\n if (!ready) {\n assert(controller._queueTotalSize === 0);\n assert(pullIntoDescriptor.bytesFilled > 0);\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n }\n\n return ready;\n}\n\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller: ReadableByteStreamController,\n size: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);\n assert(controller._byobRequest === null);\n pullIntoDescriptor.bytesFilled += size;\n}\n\nfunction ReadableByteStreamControllerHandleQueueDrain(controller: ReadableByteStreamController) {\n assert(controller._controlledReadableByteStream._state === 'readable');\n\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n } else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n}\n\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller: ReadableByteStreamController) {\n if (controller._byobRequest === null) {\n return;\n }\n\n controller._byobRequest._associatedReadableByteStreamController = undefined!;\n controller._byobRequest._view = null!;\n controller._byobRequest = null;\n}\n\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller: ReadableByteStreamController) {\n assert(!controller._closeRequested);\n\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n assert(pullIntoDescriptor.readerType !== 'none');\n\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n ReadableByteStreamControllerCommitPullIntoDescriptor(\n controller._controlledReadableByteStream,\n pullIntoDescriptor\n );\n }\n }\n}\n\nfunction ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller: ReadableByteStreamController) {\n const reader = controller._controlledReadableByteStream._reader;\n assert(IsReadableStreamDefaultReader(reader));\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n}\n\nexport function ReadableByteStreamControllerPullInto>(\n controller: ReadableByteStreamController,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = controller._controlledReadableByteStream;\n\n const ctor = view.constructor as ArrayBufferViewConstructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n\n const { byteOffset, byteLength } = view;\n\n const minimumFill = min * elementSize;\n assert(minimumFill >= elementSize && minimumFill <= byteLength);\n assert(minimumFill % elementSize === 0);\n\n let buffer: ArrayBuffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n } catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n\n const pullIntoDescriptor: BYOBPullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInClosedState(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.bytesFilled % firstDescriptor.elementSize === 0);\n\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n}\n\nfunction ReadableByteStreamControllerRespondInReadableState(controller: ReadableByteStreamController,\n bytesWritten: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n pullIntoDescriptor.buffer,\n end - remainderSize,\n remainderSize\n );\n }\n\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInternal(controller: ReadableByteStreamController, bytesWritten: number) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n assert(CanTransferArrayBuffer(firstDescriptor.buffer));\n\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n assert(bytesWritten === 0);\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n } else {\n assert(state === 'readable');\n assert(bytesWritten > 0);\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerShiftPendingPullInto(\n controller: ReadableByteStreamController\n): PullIntoDescriptor {\n assert(controller._byobRequest === null);\n const descriptor = controller._pendingPullIntos.shift()!;\n return descriptor;\n}\n\nfunction ReadableByteStreamControllerShouldCallPull(controller: ReadableByteStreamController): boolean {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return false;\n }\n\n if (controller._closeRequested) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableByteStreamControllerClearAlgorithms(controller: ReadableByteStreamController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\n\nexport function ReadableByteStreamControllerClose(controller: ReadableByteStreamController) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n\n return;\n }\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n throw e;\n }\n }\n\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n}\n\nexport function ReadableByteStreamControllerEnqueue(\n controller: ReadableByteStreamController,\n chunk: NonShared\n) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError(\n 'The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk'\n );\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n assert(controller._pendingPullIntos.length === 0);\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n } else {\n assert(controller._queue.length === 0);\n if (controller._pendingPullIntos.length > 0) {\n assert(controller._pendingPullIntos.peek().readerType === 'default');\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView as NonShared, false);\n }\n } else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n } else {\n assert(!IsReadableStreamLocked(stream));\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableByteStreamControllerError(controller: ReadableByteStreamController, e: any) {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableByteStreamControllerFillReadRequestFromQueue(\n controller: ReadableByteStreamController,\n readRequest: ReadRequest>\n) {\n assert(controller._queueTotalSize > 0);\n\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view as NonShared);\n}\n\nexport function ReadableByteStreamControllerGetBYOBRequest(\n controller: ReadableByteStreamController\n): ReadableStreamBYOBRequest | null {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer,\n firstDescriptor.byteOffset + firstDescriptor.bytesFilled,\n firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n\n const byobRequest: ReadableStreamBYOBRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view as NonShared);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n}\n\nfunction ReadableByteStreamControllerGetDesiredSize(controller: ReadableByteStreamController): number | null {\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nexport function ReadableByteStreamControllerRespond(controller: ReadableByteStreamController, bytesWritten: number) {\n assert(controller._pendingPullIntos.length > 0);\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n}\n\nexport function ReadableByteStreamControllerRespondWithNewView(controller: ReadableByteStreamController,\n view: NonShared) {\n assert(controller._pendingPullIntos.length > 0);\n assert(!IsDetachedBuffer(view.buffer));\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (view.byteLength === 0) {\n throw new TypeError(\n 'The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'\n );\n }\n }\n\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n}\n\nexport function SetUpReadableByteStreamController(stream: ReadableByteStream,\n controller: ReadableByteStreamController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n autoAllocateChunkSize: number | undefined) {\n assert(stream._readableStreamController === undefined);\n if (autoAllocateChunkSize !== undefined) {\n assert(NumberIsInteger(autoAllocateChunkSize));\n assert(autoAllocateChunkSize > 0);\n }\n\n controller._controlledReadableByteStream = stream;\n\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._byobRequest = null;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._closeRequested = false;\n controller._started = false;\n\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n\n controller._pendingPullIntos = new SimpleQueue();\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableByteStreamControllerFromUnderlyingSource(\n stream: ReadableByteStream,\n underlyingByteSource: ValidatedUnderlyingByteSource,\n highWaterMark: number\n) {\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n\n SetUpReadableByteStreamController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize\n );\n}\n\nfunction SetUpReadableStreamBYOBRequest(request: ReadableStreamBYOBRequest,\n controller: ReadableByteStreamController,\n view: NonShared) {\n assert(IsReadableByteStreamController(controller));\n assert(typeof view === 'object');\n assert(ArrayBuffer.isView(view));\n assert(!IsDetachedBuffer(view.buffer));\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n}\n\n// Helper functions for the ReadableStreamBYOBRequest.\n\nfunction byobRequestBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n}\n\n// Helper functions for the ReadableByteStreamController.\n\nfunction byteStreamControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n}\n","import { assertDictionary, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from '../readable-stream/reader-options';\n\nexport function convertReaderOptions(options: ReadableStreamGetReaderOptions | null | undefined,\n context: string): ReadableStreamGetReaderOptions {\n assertDictionary(options, context);\n const mode = options?.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n}\n\nfunction convertReadableStreamReaderMode(mode: string, context: string): 'byob' {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n}\n\nexport function convertByobReadOptions(\n options: ReadableStreamBYOBReaderReadOptions | null | undefined,\n context: string\n): ValidatedReadableStreamBYOBReaderReadOptions {\n assertDictionary(options, context);\n const min = options?.min ?? 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(\n min,\n `${context} has member 'min' that`\n )\n };\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, type ReadableByteStream, type ReadableStream } from '../readable-stream';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamController,\n ReadableByteStreamControllerPullInto\n} from './byte-stream-controller';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\nimport { IsDetachedBuffer } from '../abstract-ops/ecmascript';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from './reader-options';\nimport { convertByobReadOptions } from '../validators/reader-options';\nimport { isDataView, type NonShared, type TypedArray } from '../helpers/array-buffer-view';\n\n/**\n * A result returned by {@link ReadableStreamBYOBReader.read}.\n *\n * @public\n */\nexport type ReadableStreamBYOBReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value: T | undefined;\n};\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamBYOBReader(stream: ReadableByteStream): ReadableStreamBYOBReader {\n return new ReadableStreamBYOBReader(stream as ReadableStream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadIntoRequest>(\n stream: ReadableByteStream,\n readIntoRequest: ReadIntoRequest\n): void {\n assert(IsReadableStreamBYOBReader(stream._reader));\n assert(stream._state === 'readable' || stream._state === 'closed');\n\n (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);\n}\n\nexport function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,\n chunk: ArrayBufferView,\n done: boolean) {\n const reader = stream._reader as ReadableStreamBYOBReader;\n\n assert(reader._readIntoRequests.length > 0);\n\n const readIntoRequest = reader._readIntoRequests.shift()!;\n if (done) {\n readIntoRequest._closeSteps(chunk);\n } else {\n readIntoRequest._chunkSteps(chunk);\n }\n}\n\nexport function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {\n return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;\n}\n\nexport function ReadableStreamHasBYOBReader(stream: ReadableByteStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadIntoRequest> {\n _chunkSteps(chunk: T): void;\n\n _closeSteps(chunk: T | undefined): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamBYOBReader {\n /** @internal */\n _ownerReadableStream!: ReadableByteStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readIntoRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readIntoRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Attempts to reads bytes into view, and returns a promise resolved with the result.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(\n view: T,\n options?: ReadableStreamBYOBReaderReadOptions\n ): Promise>;\n read>(\n view: T,\n rawOptions: ReadableStreamBYOBReaderReadOptions | null | undefined = {}\n ): Promise> {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n\n let options: ValidatedReadableStreamBYOBReaderReadOptions;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > (view as unknown as TypedArray).length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n } else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamBYOBReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest: ReadIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamBYOBReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBReader;\n}\n\nexport function ReadableStreamBYOBReaderRead>(\n reader: ReadableStreamBYOBReader,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n } else {\n ReadableByteStreamControllerPullInto(\n stream._readableStreamController as ReadableByteStreamController,\n view,\n min,\n readIntoRequest\n );\n }\n}\n\nexport function ReadableStreamBYOBReaderRelease(reader: ReadableStreamBYOBReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n}\n\nexport function ReadableStreamBYOBReaderErrorReadIntoRequests(reader: ReadableStreamBYOBReader, e: any) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamBYOBReader.\n\nfunction byobReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport NumberIsNaN from '../../stub/number-isnan';\n\nexport function ExtractHighWaterMark(strategy: QueuingStrategy, defaultHWM: number): number {\n const { highWaterMark } = strategy;\n\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n\n return highWaterMark;\n}\n\nexport function ExtractSizeAlgorithm(strategy: QueuingStrategy): QueuingStrategySizeCallback {\n const { size } = strategy;\n\n if (!size) {\n return () => 1;\n }\n\n return size;\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport { assertDictionary, assertFunction, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategy(init: QueuingStrategy | null | undefined,\n context: string): QueuingStrategy {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n const size = init?.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n}\n\nfunction convertQueuingStrategySize(fn: QueuingStrategySizeCallback,\n context: string): QueuingStrategySizeCallback {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from '../writable-stream/underlying-sink';\nimport { WritableStreamDefaultController } from '../writable-stream';\n\nexport function convertUnderlyingSink(original: UnderlyingSink | null,\n context: string): ValidatedUnderlyingSink {\n assertDictionary(original, context);\n const abort = original?.abort;\n const close = original?.close;\n const start = original?.start;\n const type = original?.type;\n const write = original?.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original!, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original!, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original!, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original!, `${context} has member 'write' that`),\n type\n };\n}\n\nfunction convertUnderlyingSinkAbortCallback(\n fn: UnderlyingSinkAbortCallback,\n original: UnderlyingSink,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSinkCloseCallback(\n fn: UnderlyingSinkCloseCallback,\n original: UnderlyingSink,\n context: string\n): () => Promise {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n}\n\nfunction convertUnderlyingSinkStartCallback(\n fn: UnderlyingSinkStartCallback,\n original: UnderlyingSink,\n context: string\n): UnderlyingSinkStartCallback {\n assertFunction(fn, context);\n return (controller: WritableStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSinkWriteCallback(\n fn: UnderlyingSinkWriteCallback,\n original: UnderlyingSink,\n context: string\n): (chunk: W, controller: WritableStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: W, controller: WritableStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n","import { IsWritableStream, WritableStream } from '../writable-stream';\n\nexport function assertWritableStream(x: unknown, context: string): asserts x is WritableStream {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n}\n","/**\n * A signal object that allows you to communicate with a request and abort it if required\n * via its associated `AbortController` object.\n *\n * @remarks\n * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @public\n */\nexport interface AbortSignal {\n /**\n * Whether the request is aborted.\n */\n readonly aborted: boolean;\n\n /**\n * If aborted, returns the reason for aborting.\n */\n readonly reason?: any;\n\n /**\n * Add an event listener to be triggered when this signal becomes aborted.\n */\n addEventListener(type: 'abort', listener: () => void): void;\n\n /**\n * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}.\n */\n removeEventListener(type: 'abort', listener: () => void): void;\n}\n\nexport function isAbortSignal(value: unknown): value is AbortSignal {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof (value as AbortSignal).aborted === 'boolean';\n } catch {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n}\n\n/**\n * A controller object that allows you to abort an `AbortSignal` when desired.\n *\n * @remarks\n * This interface is compatible with the `AbortController` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @internal\n */\nexport interface AbortController {\n readonly signal: AbortSignal;\n\n abort(reason?: any): void;\n}\n\ninterface AbortControllerConstructor {\n new(): AbortController;\n}\n\nconst supportsAbortController = typeof (AbortController as any) === 'function';\n\n/**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\nexport function createAbortController(): AbortController | undefined {\n if (supportsAbortController) {\n return new (AbortController as AbortControllerConstructor)();\n }\n return undefined;\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponPromise\n} from './helpers/webidl';\nimport {\n DequeueValue,\n EnqueueValueWithSize,\n PeekQueueValue,\n type QueuePair,\n ResetQueue\n} from './abstract-ops/queue-with-sizes';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { SimpleQueue } from './simple-queue';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { AbortSteps, ErrorSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from './writable-stream/underlying-sink';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertUnderlyingSink } from './validators/underlying-sink';\nimport { assertWritableStream } from './validators/writable-stream';\nimport { type AbortController, type AbortSignal, createAbortController } from './abort-signal';\n\ntype WritableStreamState = 'writable' | 'closed' | 'erroring' | 'errored';\n\ninterface WriteOrCloseRequest {\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n}\n\ntype WriteRequest = WriteOrCloseRequest;\ntype CloseRequest = WriteOrCloseRequest;\n\ninterface PendingAbortRequest {\n _promise: Promise;\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n _reason: any;\n _wasAlreadyErroring: boolean;\n}\n\n/**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\nclass WritableStream {\n /** @internal */\n _state!: WritableStreamState;\n /** @internal */\n _storedError: any;\n /** @internal */\n _writer: WritableStreamDefaultWriter | undefined;\n /** @internal */\n _writableStreamController!: WritableStreamDefaultController;\n /** @internal */\n _writeRequests!: SimpleQueue;\n /** @internal */\n _inFlightWriteRequest: WriteRequest | undefined;\n /** @internal */\n _closeRequest: CloseRequest | undefined;\n /** @internal */\n _inFlightCloseRequest: CloseRequest | undefined;\n /** @internal */\n _pendingAbortRequest: PendingAbortRequest | undefined;\n /** @internal */\n _backpressure!: boolean;\n\n constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSink: UnderlyingSink | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n } else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n\n InitializeWritableStream(this);\n\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked(): boolean {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsWritableStreamLocked(this);\n }\n\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('abort'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n\n return WritableStreamAbort(this, reason);\n }\n\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('close'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamClose(this);\n }\n\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter(): WritableStreamDefaultWriter {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('getWriter');\n }\n\n return AcquireWritableStreamDefaultWriter(this);\n }\n}\n\nObject.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(WritableStream.prototype.abort, 'abort');\nsetFunctionName(WritableStream.prototype.close, 'close');\nsetFunctionName(WritableStream.prototype.getWriter, 'getWriter');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n}\n\nexport {\n AcquireWritableStreamDefaultWriter,\n CreateWritableStream,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamDefaultControllerErrorIfNeeded,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite,\n WritableStreamCloseQueuedOrInFlight\n};\n\nexport type {\n UnderlyingSink,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkAbortCallback\n};\n\n// Abstract operations for the WritableStream.\n\nfunction AcquireWritableStreamDefaultWriter(stream: WritableStream): WritableStreamDefaultWriter {\n return new WritableStreamDefaultWriter(stream);\n}\n\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: WritableStream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n\n const controller: WritableStreamDefaultController = Object.create(WritableStreamDefaultController.prototype);\n\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm,\n abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n}\n\nfunction InitializeWritableStream(stream: WritableStream) {\n stream._state = 'writable';\n\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n\n stream._writer = undefined;\n\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined!;\n\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n}\n\nfunction IsWritableStream(x: unknown): x is WritableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n\n return x instanceof WritableStream;\n}\n\nfunction IsWritableStreamLocked(stream: WritableStream): boolean {\n assert(IsWritableStream(stream));\n\n if (stream._writer === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamAbort(stream: WritableStream, reason: any): Promise {\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n stream._writableStreamController._abortController?.abort(reason);\n\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state as WritableStreamState;\n\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined!,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest!._promise = promise;\n\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n\n return promise;\n}\n\nfunction WritableStreamClose(stream: WritableStream): Promise {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(\n `The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n\n assert(state === 'writable' || state === 'erroring');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const promise = newPromise((resolve, reject) => {\n const closeRequest: CloseRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._closeRequest = closeRequest;\n });\n\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n\n return promise;\n}\n\n// WritableStream API exposed for controllers.\n\nfunction WritableStreamAddWriteRequest(stream: WritableStream): Promise {\n assert(IsWritableStreamLocked(stream));\n assert(stream._state === 'writable');\n\n const promise = newPromise((resolve, reject) => {\n const writeRequest: WriteRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._writeRequests.push(writeRequest);\n });\n\n return promise;\n}\n\nfunction WritableStreamDealWithRejection(stream: WritableStream, error: any) {\n const state = stream._state;\n\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n\n assert(state === 'erroring');\n WritableStreamFinishErroring(stream);\n}\n\nfunction WritableStreamStartErroring(stream: WritableStream, reason: any) {\n assert(stream._storedError === undefined);\n assert(stream._state === 'writable');\n\n const controller = stream._writableStreamController;\n assert(controller !== undefined);\n\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n}\n\nfunction WritableStreamFinishErroring(stream: WritableStream) {\n assert(stream._state === 'erroring');\n assert(!WritableStreamHasOperationMarkedInFlight(stream));\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(\n promise,\n () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n },\n (reason: any) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n}\n\nfunction WritableStreamFinishInFlightWrite(stream: WritableStream) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n}\n\nfunction WritableStreamFinishInFlightWriteWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._reject(error);\n stream._inFlightWriteRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n WritableStreamDealWithRejection(stream, error);\n}\n\nfunction WritableStreamFinishInFlightClose(stream: WritableStream) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n\n const state = stream._state;\n\n assert(state === 'writable' || state === 'erroring');\n\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n\n stream._state = 'closed';\n\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n\n assert(stream._pendingAbortRequest === undefined);\n assert(stream._storedError === undefined);\n}\n\nfunction WritableStreamFinishInFlightCloseWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._reject(error);\n stream._inFlightCloseRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n}\n\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream: WritableStream): boolean {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamHasOperationMarkedInFlight(stream: WritableStream): boolean {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamMarkCloseRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightCloseRequest === undefined);\n assert(stream._closeRequest !== undefined);\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n}\n\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightWriteRequest === undefined);\n assert(stream._writeRequests.length !== 0);\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\n\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream: WritableStream) {\n assert(stream._state === 'errored');\n if (stream._closeRequest !== undefined) {\n assert(stream._inFlightCloseRequest === undefined);\n\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n}\n\nfunction WritableStreamUpdateBackpressure(stream: WritableStream, backpressure: boolean) {\n assert(stream._state === 'writable');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n } else {\n assert(!backpressure);\n\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n\n stream._backpressure = backpressure;\n}\n\n/**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\nexport class WritableStreamDefaultWriter {\n /** @internal */\n _ownerWritableStream: WritableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _closedPromiseState!: 'pending' | 'resolved' | 'rejected';\n /** @internal */\n _readyPromise!: Promise;\n /** @internal */\n _readyPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _readyPromise_reject?: (reason: any) => void;\n /** @internal */\n _readyPromiseState!: 'pending' | 'fulfilled' | 'rejected';\n\n constructor(stream: WritableStream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n\n this._ownerWritableStream = stream;\n stream._writer = this;\n\n const state = stream._state;\n\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n } else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n } else {\n assert(state === 'errored');\n\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize(): number | null {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n\n return this._readyPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamDefaultWriterClose(this);\n }\n\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock(): void {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return;\n }\n\n assert(stream._writer !== undefined);\n\n WritableStreamDefaultWriterRelease(this);\n }\n\n /**\n * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully,\n * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return\n * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes\n * errored before the writing process is initiated.\n *\n * Note that what \"success\" means is up to the underlying sink; it might indicate simply that the chunk has been\n * accepted, and not necessarily that it is safely saved to its ultimate destination.\n */\n write(chunk: W): Promise;\n write(chunk: W = undefined!): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n});\nsetFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\nsetFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\nsetFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\nsetFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n}\n\n// Abstract operations for the WritableStreamDefaultWriter.\n\nfunction IsWritableStreamDefaultWriter(x: any): x is WritableStreamDefaultWriter {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultWriter;\n}\n\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultWriterAbort(writer: WritableStreamDefaultWriter, reason: any) {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamAbort(stream, reason);\n}\n\nfunction WritableStreamDefaultWriterClose(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamClose(stream);\n}\n\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n return WritableStreamDefaultWriterClose(writer);\n}\n\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n } else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n } else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterGetDesiredSize(writer: WritableStreamDefaultWriter): number | null {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n\n if (state === 'closed') {\n return 0;\n }\n\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\n\nfunction WritableStreamDefaultWriterRelease(writer: WritableStreamDefaultWriter) {\n const stream = writer._ownerWritableStream;\n assert(stream !== undefined);\n assert(stream._writer === writer);\n\n const releasedError = new TypeError(\n `Writer was released and can no longer be used to monitor the stream's closedness`);\n\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n\n stream._writer = undefined;\n writer._ownerWritableStream = undefined!;\n}\n\nfunction WritableStreamDefaultWriterWrite(writer: WritableStreamDefaultWriter, chunk: W): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const controller = stream._writableStreamController;\n\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable');\n\n const promise = WritableStreamAddWriteRequest(stream);\n\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n\n return promise;\n}\n\nconst closeSentinel: unique symbol = {} as any;\n\ntype QueueRecord = W | typeof closeSentinel;\n\n/**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\nexport class WritableStreamDefaultController {\n /** @internal */\n _controlledWritableStream!: WritableStream;\n /** @internal */\n _queue!: SimpleQueue>>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _abortReason: any;\n /** @internal */\n _abortController: AbortController | undefined;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _writeAlgorithm!: (chunk: W) => Promise;\n /** @internal */\n _closeAlgorithm!: () => Promise;\n /** @internal */\n _abortAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason(): any {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('abortReason');\n }\n return this._abortReason;\n }\n\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal(): AbortSignal {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e: any = undefined): void {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n\n WritableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [AbortSteps](reason: any): Promise {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations implementing interface required by the WritableStream.\n\nfunction IsWritableStreamDefaultController(x: any): x is WritableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultController;\n}\n\nfunction SetUpWritableStreamDefaultController(stream: WritableStream,\n controller: WritableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(IsWritableStream(stream));\n assert(stream._writableStreamController === undefined);\n\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(\n startPromise,\n () => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n r => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n }\n );\n}\n\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream: WritableStream,\n underlyingSink: ValidatedUnderlyingSink,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let writeAlgorithm: (chunk: W) => Promise;\n let closeAlgorithm: () => Promise;\n let abortAlgorithm: (reason: any) => Promise;\n\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write!(chunk, controller);\n } else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close!();\n } else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort!(reason);\n } else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpWritableStreamDefaultController(\n stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\nfunction WritableStreamDefaultControllerClearAlgorithms(controller: WritableStreamDefaultController) {\n controller._writeAlgorithm = undefined!;\n controller._closeAlgorithm = undefined!;\n controller._abortAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\nfunction WritableStreamDefaultControllerClose(controller: WritableStreamDefaultController) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\nfunction WritableStreamDefaultControllerGetChunkSize(controller: WritableStreamDefaultController,\n chunk: W): number {\n try {\n return controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n}\n\nfunction WritableStreamDefaultControllerGetDesiredSize(controller: WritableStreamDefaultController): number {\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nfunction WritableStreamDefaultControllerWrite(controller: WritableStreamDefaultController,\n chunk: W,\n chunkSize: number) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\n// Abstract operations for the WritableStreamDefaultController.\n\nfunction WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n if (!controller._started) {\n return;\n }\n\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n\n const state = stream._state;\n assert(state !== 'closed' && state !== 'errored');\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n\n if (controller._queue.length === 0) {\n return;\n }\n\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n } else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n}\n\nfunction WritableStreamDefaultControllerErrorIfNeeded(controller: WritableStreamDefaultController, error: any) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n}\n\nfunction WritableStreamDefaultControllerProcessClose(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkCloseRequestInFlight(stream);\n\n DequeueValue(controller);\n assert(controller._queue.length === 0);\n\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(\n sinkClosePromise,\n () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n },\n reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerProcessWrite(controller: WritableStreamDefaultController, chunk: W) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(\n sinkWritePromise,\n () => {\n WritableStreamFinishInFlightWrite(stream);\n\n const state = stream._state;\n assert(state === 'writable' || state === 'erroring');\n\n DequeueValue(controller);\n\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerGetBackpressure(controller: WritableStreamDefaultController): boolean {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n}\n\n// A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultControllerError(controller: WritableStreamDefaultController, error: any) {\n const stream = controller._controlledWritableStream;\n\n assert(stream._state === 'writable');\n\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n}\n\n// Helper functions for the WritableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n}\n\n// Helper functions for the WritableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n}\n\n\n// Helper functions for the WritableStreamDefaultWriter.\n\nfunction defaultWriterBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n}\n\nfunction defaultWriterLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n}\n\nfunction defaultWriterClosedPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n}\n\nfunction defaultWriterClosedPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n}\n\nfunction defaultWriterClosedPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n}\n\nfunction defaultWriterClosedPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._closedPromise_resolve === undefined);\n assert(writer._closedPromise_reject === undefined);\n assert(writer._closedPromiseState !== 'pending');\n\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n}\n\nfunction defaultWriterReadyPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n}\n\nfunction defaultWriterReadyPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n}\n\nfunction defaultWriterReadyPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n}\n\nfunction defaultWriterReadyPromiseReset(writer: WritableStreamDefaultWriter) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitialize(writer);\n}\n\nfunction defaultWriterReadyPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n}\n","/// \n\nfunction getGlobals(): typeof globalThis | undefined {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n } else if (typeof self !== 'undefined') {\n return self;\n } else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n}\n\nexport const globals = getGlobals();\n","/// \nimport { globals } from '../globals';\nimport { setFunctionName } from '../lib/helpers/miscellaneous';\n\ninterface DOMException extends Error {\n name: string;\n message: string;\n}\n\ntype DOMExceptionConstructor = new (message?: string, name?: string) => DOMException;\n\nfunction isDOMExceptionConstructor(ctor: unknown): ctor is DOMExceptionConstructor {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if ((ctor as DOMExceptionConstructor).name !== 'DOMException') {\n return false;\n }\n try {\n new (ctor as DOMExceptionConstructor)();\n return true;\n } catch {\n return false;\n }\n}\n\n/**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\nfunction getFromGlobal(): DOMExceptionConstructor | undefined {\n const ctor = globals?.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n}\n\n/**\n * Support:\n * - All platforms\n */\nfunction createPolyfill(): DOMExceptionConstructor {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(this: DOMException, message?: string, name?: string) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n } as any;\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-redeclare\nconst DOMException: DOMExceptionConstructor = getFromGlobal() || createPolyfill();\n\nexport { DOMException };\n","import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';\nimport { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireWritableStreamDefaultWriter,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamCloseQueuedOrInFlight,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite\n} from '../writable-stream';\nimport assert from '../../stub/assert';\nimport {\n newPromise,\n PerformPromiseThen,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponFulfillment,\n uponPromise,\n uponRejection\n} from '../helpers/webidl';\nimport { noop } from '../../utils';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\nimport { DOMException } from '../../stub/dom-exception';\n\nexport function ReadableStreamPipeTo(source: ReadableStream,\n dest: WritableStream,\n preventClose: boolean,\n preventAbort: boolean,\n preventCancel: boolean,\n signal: AbortSignal | undefined): Promise {\n assert(IsReadableStream(source));\n assert(IsWritableStream(dest));\n assert(typeof preventClose === 'boolean');\n assert(typeof preventAbort === 'boolean');\n assert(typeof preventCancel === 'boolean');\n assert(signal === undefined || isAbortSignal(signal));\n assert(!IsReadableStreamLocked(source));\n assert(!IsWritableStreamLocked(dest));\n\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n\n source._disturbed = true;\n\n let shuttingDown = false;\n\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n\n return newPromise((resolve, reject) => {\n let abortAlgorithm: () => void;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions: Array<() => Promise> = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n\n signal.addEventListener('abort', abortAlgorithm);\n }\n\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done: boolean) {\n if (done) {\n resolveLoop();\n } else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n\n next(false);\n });\n }\n\n function pipeStep(): Promise {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(\n reader,\n {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n }\n );\n });\n });\n }\n\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n } else {\n shutdown();\n }\n return null;\n });\n\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n } else {\n shutdown(true, destClosed);\n }\n }\n\n setPromiseIsHandledToTrue(pipeLoop());\n\n function waitForWritesToFinish(): Promise {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(\n currentWrite,\n () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined\n );\n }\n\n function isOrBecomesErrored(stream: ReadableStream | WritableStream,\n promise: Promise,\n action: (reason: any) => null) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n } else {\n uponRejection(promise, action);\n }\n }\n\n function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise, action: () => null) {\n if (stream._state === 'closed') {\n action();\n } else {\n uponFulfillment(promise, action);\n }\n }\n\n function shutdownWithAction(action: () => Promise, originalIsError?: boolean, originalError?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n } else {\n doTheRest();\n }\n\n function doTheRest(): null {\n uponPromise(\n action(),\n () => finalize(originalIsError, originalError),\n newError => finalize(true, newError)\n );\n return null;\n }\n }\n\n function shutdown(isError?: boolean, error?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n } else {\n finalize(isError, error);\n }\n }\n\n function finalize(isError?: boolean, error?: any): null {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n } else {\n resolve(undefined);\n }\n\n return null;\n }\n });\n}\n","import type { QueuingStrategySizeCallback } from '../queuing-strategy';\nimport assert from '../../stub/assert';\nimport { DequeueValue, EnqueueValueWithSize, type QueuePair, ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n type ReadRequest\n} from './default-reader';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsReadableStreamLocked, ReadableStream, ReadableStreamClose, ReadableStreamError } from '../readable-stream';\nimport type { ValidatedUnderlyingSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\n\n/**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableStreamDefaultController {\n /** @internal */\n _controlledReadableStream!: ReadableStream;\n /** @internal */\n _queue!: SimpleQueue>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('close');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n\n ReadableStreamDefaultControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the controlled readable stream.\n */\n enqueue(chunk: R): void;\n enqueue(chunk: R = undefined!): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n ReadableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest): void {\n const stream = this._controlledReadableStream;\n\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n } else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n\n readRequest._chunkSteps(chunk);\n } else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n // Do nothing.\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\nsetFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableStreamDefaultController.\n\nfunction IsReadableStreamDefaultController(x: any): x is ReadableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultController;\n}\n\nfunction ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController): void {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController): boolean {\n const stream = controller._controlledReadableStream;\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\n// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n\nexport function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n controller._closeRequested = true;\n\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n}\n\nexport function ReadableStreamDefaultControllerEnqueue(\n controller: ReadableStreamDefaultController,\n chunk: R\n): void {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n } else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController, e: any) {\n const stream = controller._controlledReadableStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ResetQueue(controller);\n\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableStreamDefaultControllerGetDesiredSize(\n controller: ReadableStreamDefaultController\n): number | null {\n const state = controller._controlledReadableStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\n// This is used in the implementation of TransformStream.\nexport function ReadableStreamDefaultControllerHasBackpressure(\n controller: ReadableStreamDefaultController\n): boolean {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n\n return true;\n}\n\nexport function ReadableStreamDefaultControllerCanCloseOrEnqueue(\n controller: ReadableStreamDefaultController\n): boolean {\n const state = controller._controlledReadableStream._state;\n\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n\n return false;\n}\n\nexport function SetUpReadableStreamDefaultController(stream: ReadableStream,\n controller: ReadableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(stream._readableStreamController === undefined);\n\n controller._controlledReadableStream = stream;\n\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n stream: ReadableStream,\n underlyingSource: ValidatedUnderlyingSource,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback\n) {\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// Helper functions for the ReadableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n}\n","import {\n CreateReadableByteStream,\n CreateReadableStream,\n type DefaultReadableStream,\n IsReadableStream,\n type ReadableByteStream,\n ReadableStream,\n ReadableStreamCancel,\n type ReadableStreamReader\n} from '../readable-stream';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadRequest\n} from './default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReaderRead,\n type ReadIntoRequest\n} from './byob-reader';\nimport assert from '../../stub/assert';\nimport { newPromise, promiseResolvedWith, queueMicrotask, uponRejection } from '../helpers/webidl';\nimport {\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError\n} from './default-controller';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamControllerClose,\n ReadableByteStreamControllerEnqueue,\n ReadableByteStreamControllerError,\n ReadableByteStreamControllerGetBYOBRequest,\n ReadableByteStreamControllerRespond,\n ReadableByteStreamControllerRespondWithNewView\n} from './byte-stream-controller';\nimport { CreateArrayFromList } from '../abstract-ops/ecmascript';\nimport { CloneAsUint8Array } from '../abstract-ops/miscellaneous';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function ReadableStreamTee(stream: ReadableStream,\n cloneForBranch2: boolean): [ReadableStream, ReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream as unknown as ReadableByteStream) as\n unknown as [ReadableStream, ReadableStream];\n }\n return ReadableStreamDefaultTee(stream, cloneForBranch2);\n}\n\nexport function ReadableStreamDefaultTee(\n stream: ReadableStream,\n cloneForBranch2: boolean\n): [DefaultReadableStream, DefaultReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n\n const reader = AcquireReadableStreamDefaultReader(stream);\n\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: DefaultReadableStream;\n let branch2: DefaultReadableStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function pullAlgorithm(): Promise {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm() {\n // do nothing\n }\n\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n\n uponRejection(reader._closedPromise, (r: any) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n\n return [branch1, branch2];\n}\n\nexport function ReadableByteStreamTee(stream: ReadableByteStream): [ReadableByteStream, ReadableByteStream] {\n assert(IsReadableStream(stream));\n assert(IsReadableByteStreamController(stream._readableStreamController));\n\n let reader: ReadableStreamReader> = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: ReadableByteStream;\n let branch2: ReadableByteStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function forwardReaderError(thisReader: ReadableStreamReader>) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n assert(reader._readIntoRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n\n const readRequest: ReadRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n\n function pullWithBYOBReader(view: NonShared, forBranch2: boolean) {\n if (IsReadableStreamDefaultReader>(reader)) {\n assert(reader._readRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n\n const readIntoRequest: ReadIntoRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n } else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n\n if (chunk !== undefined) {\n assert(chunk.byteLength === 0);\n\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n\n function pull1Algorithm(): Promise {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, false);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function pull2Algorithm(): Promise {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, true);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm(): void {\n return;\n }\n\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n\n forwardReaderError(reader);\n\n return [branch1, branch2];\n}\n","import { typeIsObject } from '../helpers/miscellaneous';\nimport type { ReadableStreamDefaultReadResult } from './default-reader';\n\n/**\n * A common interface for a `ReadadableStream` implementation.\n *\n * @public\n */\nexport interface ReadableStreamLike {\n readonly locked: boolean;\n\n getReader(): ReadableStreamDefaultReaderLike;\n}\n\n/**\n * A common interface for a `ReadableStreamDefaultReader` implementation.\n *\n * @public\n */\nexport interface ReadableStreamDefaultReaderLike {\n readonly closed: Promise;\n\n cancel(reason?: any): Promise;\n\n read(): Promise>;\n\n releaseLock(): void;\n}\n\nexport function isReadableStreamLike(stream: unknown): stream is ReadableStreamLike {\n return typeIsObject(stream) && typeof (stream as ReadableStreamLike).getReader !== 'undefined';\n}\n","import { CreateReadableStream, type DefaultReadableStream } from '../readable-stream';\nimport {\n isReadableStreamLike,\n type ReadableStreamDefaultReaderLike,\n type ReadableStreamLike\n} from './readable-stream-like';\nimport { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue } from './default-controller';\nimport { GetIterator, GetMethod, IteratorComplete, IteratorNext, IteratorValue } from '../abstract-ops/ecmascript';\nimport { promiseRejectedWith, promiseResolvedWith, reflectCall, transformPromiseWith } from '../helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport { noop } from '../../utils';\n\nexport function ReadableStreamFrom(\n source: Iterable | AsyncIterable | ReadableStreamLike\n): DefaultReadableStream {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n}\n\nexport function ReadableStreamFromIterable(asyncIterable: Iterable | AsyncIterable): DefaultReadableStream {\n let stream: DefaultReadableStream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n const iterator = iteratorRecord.iterator;\n let returnMethod: (typeof iterator)['return'] | undefined;\n try {\n returnMethod = GetMethod(iterator, 'return');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult: IteratorResult | Promise>;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n\nexport function ReadableStreamFromDefaultReader(\n reader: ReadableStreamDefaultReaderLike\n): DefaultReadableStream {\n let stream: DefaultReadableStream;\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let readPromise;\n try {\n readPromise = reader.read();\n } catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n } catch (e) {\n return promiseRejectedWith(e);\n }\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n","import { assertDictionary, assertFunction, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamController,\n UnderlyingByteSource,\n UnderlyingDefaultOrByteSource,\n UnderlyingDefaultOrByteSourcePullCallback,\n UnderlyingDefaultOrByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n ValidatedUnderlyingDefaultOrByteSource\n} from '../readable-stream/underlying-source';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\n\nexport function convertUnderlyingDefaultOrByteSource(\n source: UnderlyingSource | UnderlyingByteSource | null,\n context: string\n): ValidatedUnderlyingDefaultOrByteSource {\n assertDictionary(source, context);\n const original = source as (UnderlyingDefaultOrByteSource | null);\n const autoAllocateChunkSize = original?.autoAllocateChunkSize;\n const cancel = original?.cancel;\n const pull = original?.pull;\n const start = original?.start;\n const type = original?.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(\n autoAllocateChunkSize,\n `${context} has member 'autoAllocateChunkSize' that`\n ),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original!, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original!, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n}\n\nfunction convertUnderlyingSourceCancelCallback(\n fn: UnderlyingSourceCancelCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSourcePullCallback(\n fn: UnderlyingDefaultOrByteSourcePullCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (controller: ReadableStreamController) => Promise {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSourceStartCallback(\n fn: UnderlyingDefaultOrByteSourceStartCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): UnderlyingDefaultOrByteSourceStartCallback {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertReadableStreamType(type: string, context: string): 'bytes' {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n}\n","import { assertDictionary } from './basic';\nimport type {\n ReadableStreamIteratorOptions,\n ValidatedReadableStreamIteratorOptions\n} from '../readable-stream/iterator-options';\n\nexport function convertIteratorOptions(options: ReadableStreamIteratorOptions | null | undefined,\n context: string): ValidatedReadableStreamIteratorOptions {\n assertDictionary(options, context);\n const preventCancel = options?.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n}\n","import { assertDictionary } from './basic';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from '../readable-stream/pipe-options';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\n\nexport function convertPipeOptions(options: StreamPipeOptions | null | undefined,\n context: string): ValidatedStreamPipeOptions {\n assertDictionary(options, context);\n const preventAbort = options?.preventAbort;\n const preventCancel = options?.preventCancel;\n const preventClose = options?.preventClose;\n const signal = options?.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n}\n\nfunction assertAbortSignal(signal: unknown, context: string): asserts signal is AbortSignal {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n}\n","import { assertDictionary, assertRequiredField } from './basic';\nimport { ReadableStream } from '../readable-stream';\nimport { WritableStream } from '../writable-stream';\nimport { assertReadableStream } from './readable-stream';\nimport { assertWritableStream } from './writable-stream';\n\nexport function convertReadableWritablePair(\n pair: { readable: RS; writable: WS } | null | undefined,\n context: string\n): { readable: RS; writable: WS } {\n assertDictionary(pair, context);\n\n const readable = pair?.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n\n const writable = pair?.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n\n return { readable, writable };\n}\n","import assert from '../stub/assert';\nimport {\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith\n} from './helpers/webidl';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { AcquireReadableStreamAsyncIterator, type ReadableStreamAsyncIterator } from './readable-stream/async-iterator';\nimport { defaultReaderClosedPromiseReject, defaultReaderClosedPromiseResolve } from './readable-stream/generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderErrorReadRequests,\n type ReadableStreamDefaultReadResult\n} from './readable-stream/default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBReaderErrorReadIntoRequests,\n type ReadableStreamBYOBReadResult\n} from './readable-stream/byob-reader';\nimport { ReadableStreamPipeTo } from './readable-stream/pipe';\nimport { ReadableStreamTee } from './readable-stream/tee';\nimport { ReadableStreamFrom } from './readable-stream/from';\nimport { IsWritableStream, IsWritableStreamLocked, WritableStream } from './writable-stream';\nimport { SimpleQueue } from './simple-queue';\nimport {\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n SetUpReadableByteStreamController,\n SetUpReadableByteStreamControllerFromUnderlyingSource\n} from './readable-stream/byte-stream-controller';\nimport {\n ReadableStreamDefaultController,\n SetUpReadableStreamDefaultController,\n SetUpReadableStreamDefaultControllerFromUnderlyingSource\n} from './readable-stream/default-controller';\nimport type {\n UnderlyingByteSource,\n UnderlyingByteSourcePullCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceStartCallback\n} from './readable-stream/underlying-source';\nimport { noop } from '../utils';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { CreateArrayFromList, SymbolAsyncIterator } from './abstract-ops/ecmascript';\nimport { CancelSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertUnderlyingDefaultOrByteSource } from './validators/underlying-source';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions\n} from './readable-stream/reader-options';\nimport { convertReaderOptions } from './validators/reader-options';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from './readable-stream/pipe-options';\nimport type { ReadableStreamIteratorOptions } from './readable-stream/iterator-options';\nimport { convertIteratorOptions } from './validators/iterator-options';\nimport { convertPipeOptions } from './validators/pipe-options';\nimport type { ReadableWritablePair } from './readable-stream/readable-writable-pair';\nimport { convertReadableWritablePair } from './validators/readable-writable-pair';\nimport type { ReadableStreamDefaultReaderLike, ReadableStreamLike } from './readable-stream/readable-stream-like';\nimport type { NonShared } from './helpers/array-buffer-view';\n\nexport type DefaultReadableStream = ReadableStream & {\n _readableStreamController: ReadableStreamDefaultController\n};\n\nexport type ReadableByteStream = ReadableStream> & {\n _readableStreamController: ReadableByteStreamController\n};\n\ntype ReadableStreamState = 'readable' | 'closed' | 'errored';\n\n/**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\nexport class ReadableStream implements AsyncIterable {\n /** @internal */\n _state!: ReadableStreamState;\n /** @internal */\n _reader: ReadableStreamReader | undefined;\n /** @internal */\n _storedError: any;\n /** @internal */\n _disturbed!: boolean;\n /** @internal */\n _readableStreamController!: ReadableStreamDefaultController | ReadableByteStreamController;\n\n constructor(underlyingSource: UnderlyingByteSource, strategy?: { highWaterMark?: number; size?: undefined });\n constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSource: UnderlyingSource | UnderlyingByteSource | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n } else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n\n InitializeReadableStream(this);\n\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(\n this as unknown as ReadableByteStream,\n underlyingSource,\n highWaterMark\n );\n } else {\n assert(underlyingSource.type === undefined);\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n this,\n underlyingSource,\n highWaterMark,\n sizeAlgorithm\n );\n }\n }\n\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked(): boolean {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsReadableStreamLocked(this);\n }\n\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('cancel'));\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n\n return ReadableStreamCancel(this, reason);\n }\n\n /**\n * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader.\n *\n * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams,\n * i.e. streams which were constructed specifically with the ability to handle \"bring your own buffer\" reading.\n * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its\n * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise\n * control over allocation.\n */\n getReader({ mode }: { mode: 'byob' }): ReadableStreamBYOBReader;\n /**\n * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader.\n * While the stream is locked, no other reader can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to consume a stream\n * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours\n * or cancel the stream, which would interfere with your abstraction.\n */\n getReader(): ReadableStreamDefaultReader;\n getReader(\n rawOptions: ReadableStreamGetReaderOptions | null | undefined = undefined\n ): ReadableStreamDefaultReader | ReadableStreamBYOBReader {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('getReader');\n }\n\n const options = convertReaderOptions(rawOptions, 'First parameter');\n\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n\n assert(options.mode === 'byob');\n return AcquireReadableStreamBYOBReader(this as unknown as ReadableByteStream);\n }\n\n /**\n * Provides a convenient, chainable way of piping this readable stream through a transform stream\n * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream\n * into the writable side of the supplied pair, and returns the readable side for further use.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeThrough(\n transform: { readable: RS; writable: WritableStream },\n options?: StreamPipeOptions\n ): RS;\n pipeThrough(\n rawTransform: { readable: RS; writable: WritableStream } | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}\n ): RS {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n\n const promise = ReadableStreamPipeTo(\n this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n\n setPromiseIsHandledToTrue(promise);\n\n return transform.readable;\n }\n\n /**\n * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under\n * various error conditions can be customized with a number of passed options. It returns a promise that fulfills\n * when the piping process completes successfully, or rejects if any errors were encountered.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise;\n pipeTo(destination: WritableStream | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('pipeTo'));\n }\n\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(\n new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)\n );\n }\n\n let options: ValidatedStreamPipeOptions;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')\n );\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')\n );\n }\n\n return ReadableStreamPipeTo(\n this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n }\n\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee(): [ReadableStream, ReadableStream] {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('tee');\n }\n\n const branches = ReadableStreamTee(this, false);\n return CreateArrayFromList(branches);\n }\n\n /**\n * Asynchronously iterates over the chunks in the stream's internal queue.\n *\n * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader.\n * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method\n * is called, e.g. by breaking out of the loop.\n *\n * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also\n * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing\n * `true` for the `preventCancel` option.\n */\n values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n values(rawOptions: ReadableStreamIteratorOptions | null | undefined = undefined): ReadableStreamAsyncIterator {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('values');\n }\n\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n\n /**\n * {@inheritDoc ReadableStream.values}\n */\n [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n\n [SymbolAsyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator {\n // Stub implementation, overridden below\n return this.values(options);\n }\n\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream {\n return ReadableStreamFrom(asyncIterable);\n }\n}\n\nObject.defineProperties(ReadableStream, {\n from: { enumerable: true }\n});\nObject.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(ReadableStream.from, 'from');\nsetFunctionName(ReadableStream.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStream.prototype.getReader, 'getReader');\nsetFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\nsetFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\nsetFunctionName(ReadableStream.prototype.tee, 'tee');\nsetFunctionName(ReadableStream.prototype.values, 'values');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n}\nObject.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n});\n\nexport type {\n ReadableStreamAsyncIterator,\n ReadableStreamDefaultReadResult,\n ReadableStreamBYOBReadResult,\n ReadableStreamBYOBReaderReadOptions,\n UnderlyingByteSource,\n UnderlyingSource,\n UnderlyingSourceStartCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceCancelCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingByteSourcePullCallback,\n StreamPipeOptions,\n ReadableWritablePair,\n ReadableStreamIteratorOptions,\n ReadableStreamLike,\n ReadableStreamDefaultReaderLike\n};\n\n// Abstract operations for the ReadableStream.\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1\n): DefaultReadableStream {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: DefaultReadableStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n\n return stream;\n}\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableByteStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise\n): ReadableByteStream {\n const stream: ReadableByteStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n\n return stream;\n}\n\nfunction InitializeReadableStream(stream: ReadableStream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n}\n\nexport function IsReadableStream(x: unknown): x is ReadableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStream;\n}\n\nexport function IsReadableStreamDisturbed(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n return stream._disturbed;\n}\n\nexport function IsReadableStreamLocked(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n if (stream._reader === undefined) {\n return false;\n }\n\n return true;\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamCancel(stream: ReadableStream, reason: any): Promise {\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n ReadableStreamClose(stream);\n\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n}\n\nexport function ReadableStreamClose(stream: ReadableStream): void {\n assert(stream._state === 'readable');\n\n stream._state = 'closed';\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseResolve(reader);\n\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n}\n\nexport function ReadableStreamError(stream: ReadableStream, e: any): void {\n assert(IsReadableStream(stream));\n assert(stream._state === 'readable');\n\n stream._state = 'errored';\n stream._storedError = e;\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseReject(reader, e);\n\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n } else {\n assert(IsReadableStreamBYOBReader(reader));\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n}\n\n// Readers\n\nexport type ReadableStreamReader = ReadableStreamDefaultReader | ReadableStreamBYOBReader;\n\nexport {\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader\n};\n\n// Controllers\n\nexport {\n ReadableStreamDefaultController,\n ReadableStreamBYOBRequest,\n ReadableByteStreamController\n};\n\n// Helper functions for the ReadableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n}\n","import type { QueuingStrategyInit } from '../queuing-strategy';\nimport { assertDictionary, assertRequiredField, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategyInit(init: QueuingStrategyInit | null | undefined,\n context: string): QueuingStrategyInit {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst byteLengthSizeFunction = (chunk: ArrayBufferView): number => {\n return chunk.byteLength;\n};\nsetFunctionName(byteLengthSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\nexport default class ByteLengthQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _byteLengthQueuingStrategyHighWaterMark: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size(): (chunk: ArrayBufferView) => number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n}\n\nObject.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the ByteLengthQueuingStrategy.\n\nfunction byteLengthBrandCheckException(name: string): TypeError {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n}\n\nexport function IsByteLengthQueuingStrategy(x: any): x is ByteLengthQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof ByteLengthQueuingStrategy;\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst countSizeFunction = (): 1 => {\n return 1;\n};\nsetFunctionName(countSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\nexport default class CountQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _countQueuingStrategyHighWaterMark!: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size(): (chunk: any) => 1 {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n}\n\nObject.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the CountQueuingStrategy.\n\nfunction countBrandCheckException(name: string): TypeError {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n}\n\nexport function IsCountQueuingStrategy(x: any): x is CountQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof CountQueuingStrategy;\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from '../transform-stream/transformer';\nimport { TransformStreamDefaultController } from '../transform-stream';\n\nexport function convertTransformer(original: Transformer | null,\n context: string): ValidatedTransformer {\n assertDictionary(original, context);\n const cancel = original?.cancel;\n const flush = original?.flush;\n const readableType = original?.readableType;\n const start = original?.start;\n const transform = original?.transform;\n const writableType = original?.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original!, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original!, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original!, `${context} has member 'transform' that`),\n writableType\n };\n}\n\nfunction convertTransformerFlushCallback(\n fn: TransformerFlushCallback,\n original: Transformer,\n context: string\n): (controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertTransformerStartCallback(\n fn: TransformerStartCallback,\n original: Transformer,\n context: string\n): TransformerStartCallback {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertTransformerTransformCallback(\n fn: TransformerTransformCallback,\n original: Transformer,\n context: string\n): (chunk: I, controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: I, controller: TransformStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n\nfunction convertTransformerCancelCallback(\n fn: TransformerCancelCallback,\n original: Transformer,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith,\n uponPromise\n} from './helpers/webidl';\nimport { CreateReadableStream, type DefaultReadableStream, ReadableStream } from './readable-stream';\nimport {\n ReadableStreamDefaultControllerCanCloseOrEnqueue,\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError,\n ReadableStreamDefaultControllerGetDesiredSize,\n ReadableStreamDefaultControllerHasBackpressure\n} from './readable-stream/default-controller';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { CreateWritableStream, WritableStream, WritableStreamDefaultControllerErrorIfNeeded } from './writable-stream';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from './transform-stream/transformer';\nimport { convertTransformer } from './validators/transformer';\n\n// Class TransformStream\n\n/**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\nexport class TransformStream {\n /** @internal */\n _writable!: WritableStream;\n /** @internal */\n _readable!: DefaultReadableStream;\n /** @internal */\n _backpressure!: boolean;\n /** @internal */\n _backpressureChangePromise!: Promise;\n /** @internal */\n _backpressureChangePromise_resolve!: () => void;\n /** @internal */\n _transformStreamController!: TransformStreamDefaultController;\n\n constructor(\n transformer?: Transformer,\n writableStrategy?: QueuingStrategy,\n readableStrategy?: QueuingStrategy\n );\n constructor(rawTransformer: Transformer | null | undefined = {},\n rawWritableStrategy: QueuingStrategy | null | undefined = {},\n rawReadableStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(\n this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm\n );\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n } else {\n startPromise_resolve(undefined);\n }\n }\n\n /**\n * The readable side of the transform stream.\n */\n get readable(): ReadableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n\n return this._readable;\n }\n\n /**\n * The writable side of the transform stream.\n */\n get writable(): WritableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n\n return this._writable;\n }\n}\n\nObject.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n}\n\nexport type {\n Transformer,\n TransformerCancelCallback,\n TransformerStartCallback,\n TransformerFlushCallback,\n TransformerTransformCallback\n};\n\n// Transform Stream Abstract Operations\n\nexport function CreateTransformStream(startAlgorithm: () => void | PromiseLike,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n writableHighWaterMark = 1,\n writableSizeAlgorithm: QueuingStrategySizeCallback = () => 1,\n readableHighWaterMark = 0,\n readableSizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(writableHighWaterMark));\n assert(IsNonNegativeNumber(readableHighWaterMark));\n\n const stream: TransformStream = Object.create(TransformStream.prototype);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n\n const startResult = startAlgorithm();\n startPromise_resolve(startResult);\n return stream;\n}\n\nfunction InitializeTransformStream(stream: TransformStream,\n startPromise: Promise,\n writableHighWaterMark: number,\n writableSizeAlgorithm: QueuingStrategySizeCallback,\n readableHighWaterMark: number,\n readableSizeAlgorithm: QueuingStrategySizeCallback) {\n function startAlgorithm(): Promise {\n return startPromise;\n }\n\n function writeAlgorithm(chunk: I): Promise {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n\n function abortAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n\n function closeAlgorithm(): Promise {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm,\n writableHighWaterMark, writableSizeAlgorithm);\n\n function pullAlgorithm(): Promise {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n\n function cancelAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined!;\n stream._backpressureChangePromise = undefined!;\n stream._backpressureChangePromise_resolve = undefined!;\n TransformStreamSetBackpressure(stream, true);\n\n stream._transformStreamController = undefined!;\n}\n\nfunction IsTransformStream(x: unknown): x is TransformStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n\n return x instanceof TransformStream;\n}\n\n// This is a no-op if both sides are already errored.\nfunction TransformStreamError(stream: TransformStream, e: any) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n}\n\nfunction TransformStreamErrorWritableAndUnblockWrite(stream: TransformStream, e: any) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n}\n\nfunction TransformStreamUnblockWrite(stream: TransformStream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure()\n // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time\n // _backpressure is set.\n TransformStreamSetBackpressure(stream, false);\n }\n}\n\nfunction TransformStreamSetBackpressure(stream: TransformStream, backpressure: boolean) {\n // Passes also when called during construction.\n assert(stream._backpressure !== backpressure);\n\n if (stream._backpressureChangePromise !== undefined) {\n stream._backpressureChangePromise_resolve();\n }\n\n stream._backpressureChangePromise = newPromise(resolve => {\n stream._backpressureChangePromise_resolve = resolve;\n });\n\n stream._backpressure = backpressure;\n}\n\n// Class TransformStreamDefaultController\n\n/**\n * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}.\n *\n * @public\n */\nexport class TransformStreamDefaultController {\n /** @internal */\n _controlledTransformStream: TransformStream;\n /** @internal */\n _finishPromise: Promise | undefined;\n /** @internal */\n _finishPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _finishPromise_reject?: (reason: any) => void;\n /** @internal */\n _transformAlgorithm: (chunk: any) => Promise;\n /** @internal */\n _flushAlgorithm: () => Promise;\n /** @internal */\n _cancelAlgorithm: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full.\n */\n get desiredSize(): number | null {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n const readableController = this._controlledTransformStream._readable._readableStreamController;\n return ReadableStreamDefaultControllerGetDesiredSize(readableController);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the readable side of the controlled transform stream.\n */\n enqueue(chunk: O): void;\n enqueue(chunk: O = undefined!): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n TransformStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors both the readable side and the writable side of the controlled transform stream, making all future\n * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.\n */\n error(reason: any = undefined): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n TransformStreamDefaultControllerError(this, reason);\n }\n\n /**\n * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate(): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n\n TransformStreamDefaultControllerTerminate(this);\n }\n}\n\nObject.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(TransformStreamDefaultController.prototype.error, 'error');\nsetFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n}\n\n// Transform Stream Default Controller Abstract Operations\n\nfunction IsTransformStreamDefaultController(x: any): x is TransformStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n\n return x instanceof TransformStreamDefaultController;\n}\n\nfunction SetUpTransformStreamDefaultController(stream: TransformStream,\n controller: TransformStreamDefaultController,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise) {\n assert(IsTransformStream(stream));\n assert(stream._transformStreamController === undefined);\n\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nfunction SetUpTransformStreamDefaultControllerFromTransformer(stream: TransformStream,\n transformer: ValidatedTransformer) {\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n let transformAlgorithm: (chunk: I) => Promise;\n let flushAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform!(chunk, controller);\n } else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk as unknown as O);\n return promiseResolvedWith(undefined);\n } catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush!(controller);\n } else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n}\n\nfunction TransformStreamDefaultControllerClearAlgorithms(controller: TransformStreamDefaultController) {\n controller._transformAlgorithm = undefined!;\n controller._flushAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\nfunction TransformStreamDefaultControllerEnqueue(controller: TransformStreamDefaultController, chunk: O) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n\n // We throttle transform invocations based on the backpressure of the ReadableStream, but we still\n // accept TransformStreamDefaultControllerEnqueue() calls.\n\n try {\n ReadableStreamDefaultControllerEnqueue(readableController, chunk);\n } catch (e) {\n // This happens when readableStrategy.size() throws.\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n\n throw stream._readable._storedError;\n }\n\n const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);\n if (backpressure !== stream._backpressure) {\n assert(backpressure);\n TransformStreamSetBackpressure(stream, true);\n }\n}\n\nfunction TransformStreamDefaultControllerError(controller: TransformStreamDefaultController, e: any) {\n TransformStreamError(controller._controlledTransformStream, e);\n}\n\nfunction TransformStreamDefaultControllerPerformTransform(controller: TransformStreamDefaultController,\n chunk: I) {\n const transformPromise = controller._transformAlgorithm(chunk);\n return transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n}\n\nfunction TransformStreamDefaultControllerTerminate(controller: TransformStreamDefaultController) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n\n ReadableStreamDefaultControllerClose(readableController);\n\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n}\n\n// TransformStreamDefaultSink Algorithms\n\nfunction TransformStreamDefaultSinkWriteAlgorithm(stream: TransformStream, chunk: I): Promise {\n assert(stream._writable._state === 'writable');\n\n const controller = stream._transformStreamController;\n\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n assert(backpressureChangePromise !== undefined);\n return transformPromiseWith(backpressureChangePromise, () => {\n const writable = stream._writable;\n const state = writable._state;\n if (state === 'erroring') {\n throw writable._storedError;\n }\n assert(state === 'writable');\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n });\n }\n\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n}\n\nfunction TransformStreamDefaultSinkAbortAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally,\n // we don't run the _cancelAlgorithm again.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerError(readable._readableStreamController, reason);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\nfunction TransformStreamDefaultSinkCloseAlgorithm(stream: TransformStream): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// TransformStreamDefaultSource Algorithms\n\nfunction TransformStreamDefaultSourcePullAlgorithm(stream: TransformStream): Promise {\n // Invariant. Enforced by the promises returned by start() and pull().\n assert(stream._backpressure);\n\n assert(stream._backpressureChangePromise !== undefined);\n\n TransformStreamSetBackpressure(stream, false);\n\n // Prevent the next pull() call until there is backpressure.\n return stream._backpressureChangePromise;\n}\n\nfunction TransformStreamDefaultSourceCancelAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._writable cannot change after construction, so caching it across a call to user code is safe.\n const writable = stream._writable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or\n // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the\n // _flushAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (writable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, writable._storedError);\n } else {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// Helper functions for the TransformStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n}\n\nexport function defaultControllerFinishPromiseResolve(controller: TransformStreamDefaultController) {\n if (controller._finishPromise_resolve === undefined) {\n return;\n }\n\n controller._finishPromise_resolve();\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nexport function defaultControllerFinishPromiseReject(controller: TransformStreamDefaultController, reason: any) {\n if (controller._finishPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(controller._finishPromise!);\n controller._finishPromise_reject(reason);\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\n// Helper functions for the TransformStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStream.prototype.${name} can only be used on a TransformStream`);\n}\n","import {\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n ReadableByteStreamController,\n ReadableStream,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultController,\n ReadableStreamDefaultReader,\n TransformStream,\n TransformStreamDefaultController,\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter\n} from './ponyfill';\nimport { globals } from './globals';\n\n// Export\nexport * from './ponyfill';\n\nconst exports = {\n ReadableStream,\n ReadableStreamDefaultController,\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader,\n\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter,\n\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n\n TransformStream,\n TransformStreamDefaultController\n};\n\n// Add classes to global scope\nif (typeof 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r=e._controlledReadableByteStream._state;return"errored"===r?null:"closed"===r?0:e._strategyHWM-e._queueTotalSize}function nr(e,r){var t=e._pendingPullIntos.peek();if("closed"===e._controlledReadableByteStream._state){if(0!==r)throw new TypeError("bytesWritten must be 0 when calling respond() on a closed stream")}else{if(0===r)throw new TypeError("bytesWritten must be greater than 0 when calling respond() on a readable stream");if(t.bytesFilled+r>t.byteLength)throw new RangeError("bytesWritten out of range")}t.buffer=be(t.buffer),Ge(e,r)}function or(e,r){var t=e._pendingPullIntos.peek();if("closed"===e._controlledReadableByteStream._state){if(0!==r.byteLength)throw new TypeError("The view's length must be 0 when calling respondWithNewView() on a closed stream")}else if(0===r.byteLength)throw new TypeError("The view's length must be greater than 0 when calling respondWithNewView() on a readable stream");if(t.byteOffset+t.bytesFilled!==r.byteOffset)throw new RangeError("The region 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0:e.abort,n=null==e?void 0:e.close,o=null==e?void 0:e.start,a=null==e?void 0:e.type,i=null==e?void 0:e.write;return{abort:void 0===t?void 0:wr(t,e,"".concat(r," has member 'abort' that")),close:void 0===n?void 0:Rr(n,e,"".concat(r," has member 'close' that")),start:void 0===o?void 0:Tr(o,e,"".concat(r," has member 'start' that")),write:void 0===i?void 0:Pr(i,e,"".concat(r," has member 'write' that")),type:a}}(e,"First parameter");if(Wr(this),void 0!==n.type)throw new RangeError("Invalid type is specified");var o=vr(t);!function(e,r,t,n){var o,a,i,u,l=Object.create(Xr.prototype);o=void 0!==r.start?function(){return r.start(l)}:function(){};a=void 0!==r.write?function(e){return r.write(e,l)}:function(){return m(void 0)};i=void 0!==r.close?function(){return r.close()}:function(){return m(void 0)};u=void 0!==r.abort?function(e){return r.abort(e)}:function(){return m(void 0)};Kr(e,l,o,a,i,u,t,n)}(this,n,yr(t,1),o)}return Object.defineProperty(WritableStream.prototype,"locked",{get:function(){if(!jr(this))throw ot("locked");return Br(this)},enumerable:!1,configurable:!0}),WritableStream.prototype.abort=function(e){return void 0===e&&(e=void 0),jr(this)?Br(this)?_(new TypeError("Cannot abort a stream that already has a writer")):kr(this,e):_(ot("abort"))},WritableStream.prototype.close=function(){return jr(this)?Br(this)?_(new TypeError("Cannot close a stream that already has a writer")):Lr(this)?_(new TypeError("Cannot close an already-closing stream")):Ar(this):_(ot("close"))},WritableStream.prototype.getWriter=function(){if(!jr(this))throw ot("getWriter");return Or(this)},WritableStream}();function Or(e){return new xr(e)}function Wr(e){e._state="writable",e._storedError=void 0,e._writer=void 0,e._writableStreamController=void 0,e._writeRequests=new q,e._inFlightWriteRequest=void 0,e._closeRequest=void 0,e._inFlightCloseRequest=void 0,e._pendingAbortRequest=void 0,e._backpressure=!1}function jr(e){return!!s(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_writableStreamController")&&e instanceof Er)}function Br(e){return void 0!==e._writer}function kr(e,r){var t;if("closed"===e._state||"errored"===e._state)return m(void 0);e._writableStreamController._abortReason=r,null===(t=e._writableStreamController._abortController)||void 0===t||t.abort(r);var n=e._state;if("closed"===n||"errored"===n)return m(void 0);if(void 0!==e._pendingAbortRequest)return e._pendingAbortRequest._promise;var o=!1;"erroring"===n&&(o=!0,r=void 0);var a=h((function(t,n){e._pendingAbortRequest={_promise:void 0,_resolve:t,_reject:n,_reason:r,_wasAlreadyErroring:o}}));return e._pendingAbortRequest._promise=a,o||Ir(e,r),a}function Ar(e){var r=e._state;if("closed"===r||"errored"===r)return _(new TypeError("The stream (in ".concat(r," state) is not in the writable state and cannot be closed")));var t,n=h((function(r,t){var n={_resolve:r,_reject:t};e._closeRequest=n})),o=e._writer;return void 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0!==e._closeRequest&&(e._closeRequest._reject(e._storedError),e._closeRequest=void 0);var r=e._writer;void 0!==r&&ct(r,e._storedError)}function Mr(e,r){var t=e._writer;void 0!==t&&r!==e._backpressure&&(r?function(e){dt(e)}(t):mt(t)),e._backpressure=r}Object.defineProperties(Er.prototype,{abort:{enumerable:!0},close:{enumerable:!0},getWriter:{enumerable:!0},locked:{enumerable:!0}}),f(Er.prototype.abort,"abort"),f(Er.prototype.close,"close"),f(Er.prototype.getWriter,"getWriter"),"symbol"==typeof r.toStringTag&&Object.defineProperty(Er.prototype,r.toStringTag,{value:"WritableStream",configurable:!0});var xr=function(){function WritableStreamDefaultWriter(e){if(V(e,1,"WritableStreamDefaultWriter"),Cr(e,"First parameter"),Br(e))throw new TypeError("This stream has already been locked for exclusive writing by another writer");this._ownerWritableStream=e,e._writer=this;var r,t=e._state;if("writable"===t)!Lr(e)&&e._backpressure?dt(this):pt(this),lt(this);else if("erroring"===t)bt(this,e._storedError),lt(this);else if("closed"===t)pt(this),lt(r=this),ft(r);else{var n=e._storedError;bt(this,n),st(this,n)}}return Object.defineProperty(WritableStreamDefaultWriter.prototype,"closed",{get:function(){return Yr(this)?this._closedPromise:_(it("closed"))},enumerable:!1,configurable:!0}),Object.defineProperty(WritableStreamDefaultWriter.prototype,"desiredSize",{get:function(){if(!Yr(this))throw it("desiredSize");if(void 0===this._ownerWritableStream)throw ut("desiredSize");return function(e){var r=e._ownerWritableStream,t=r._state;if("errored"===t||"erroring"===t)return null;if("closed"===t)return 0;return $r(r._writableStreamController)}(this)},enumerable:!1,configurable:!0}),Object.defineProperty(WritableStreamDefaultWriter.prototype,"ready",{get:function(){return Yr(this)?this._readyPromise:_(it("ready"))},enumerable:!1,configurable:!0}),WritableStreamDefaultWriter.prototype.abort=function(e){return void 0===e&&(e=void 0),Yr(this)?void 0===this._ownerWritableStream?_(ut("abort")):function(e,r){return kr(e._ownerWritableStream,r)}(this,e):_(it("abort"))},WritableStreamDefaultWriter.prototype.close=function(){if(!Yr(this))return _(it("close"));var e=this._ownerWritableStream;return void 0===e?_(ut("close")):Lr(e)?_(new TypeError("Cannot close an already-closing stream")):Qr(this)},WritableStreamDefaultWriter.prototype.releaseLock=function(){if(!Yr(this))throw it("releaseLock");void 0!==this._ownerWritableStream&&Vr(this)},WritableStreamDefaultWriter.prototype.write=function(e){return void 0===e&&(e=void 0),Yr(this)?void 0===this._ownerWritableStream?_(ut("write to")):Ur(this,e):_(it("write"))},WritableStreamDefaultWriter}();function Yr(e){return!!s(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_ownerWritableStream")&&e instanceof xr)}function Qr(e){return Ar(e._ownerWritableStream)}function Nr(e,r){"pending"===e._closedPromiseState?ct(e,r):function(e,r){st(e,r)}(e,r)}function 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n=e._controlledWritableStream;if(!Lr(n)&&"writable"===n._state){Mr(n,tt(e))}et(e)}(n,r,o),i}Object.defineProperties(xr.prototype,{abort:{enumerable:!0},close:{enumerable:!0},releaseLock:{enumerable:!0},write:{enumerable:!0},closed:{enumerable:!0},desiredSize:{enumerable:!0},ready:{enumerable:!0}}),f(xr.prototype.abort,"abort"),f(xr.prototype.close,"close"),f(xr.prototype.releaseLock,"releaseLock"),f(xr.prototype.write,"write"),"symbol"==typeof r.toStringTag&&Object.defineProperty(xr.prototype,r.toStringTag,{value:"WritableStreamDefaultWriter",configurable:!0});var Gr={},Xr=function(){function WritableStreamDefaultController(){throw new TypeError("Illegal constructor")}return Object.defineProperty(WritableStreamDefaultController.prototype,"abortReason",{get:function(){if(!Jr(this))throw at("abortReason");return this._abortReason},enumerable:!1,configurable:!0}),Object.defineProperty(WritableStreamDefaultController.prototype,"signal",{get:function(){if(!Jr(this))throw at("signal");if(void 0===this._abortController)throw new TypeError("WritableStreamDefaultController.prototype.signal is not supported");return this._abortController.signal},enumerable:!1,configurable:!0}),WritableStreamDefaultController.prototype.error=function(e){if(void 0===e&&(e=void 0),!Jr(this))throw at("error");"writable"===this._controlledWritableStream._state&&nt(this,e)},WritableStreamDefaultController.prototype[E]=function(e){var r=this._abortAlgorithm(e);return Zr(this),r},WritableStreamDefaultController.prototype[O]=function(){Oe(this)},WritableStreamDefaultController}();function Jr(e){return!!s(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_controlledWritableStream")&&e instanceof Xr)}function Kr(e,r,t,n,o,a,i,u){r._controlledWritableStream=e,e._writableStreamController=r,r._queue=void 0,r._queueTotalSize=void 0,Oe(r),r._abortReason=void 0,r._abortController=function(){if(qr)return new AbortController}(),r._started=!1,r._strategySizeAlgorithm=u,r._strategyHWM=i,r._writeAlgorithm=n,r._closeAlgorithm=o,r._abortAlgorithm=a;var l=tt(r);Mr(e,l),v(m(t()),(function(){return r._started=!0,et(r),null}),(function(t){return r._started=!0,zr(e,t),null}))}function Zr(e){e._writeAlgorithm=void 0,e._closeAlgorithm=void 0,e._abortAlgorithm=void 0,e._strategySizeAlgorithm=void 0}function $r(e){return e._strategyHWM-e._queueTotalSize}function et(e){var r=e._controlledWritableStream;if(e._started&&void 0===r._inFlightWriteRequest)if("erroring"!==r._state){if(0!==e._queue.length){var t=e._queue.peek().value;t===Gr?function(e){var r=e._controlledWritableStream;(function(e){e._inFlightCloseRequest=e._closeRequest,e._closeRequest=void 0})(r),qe(e);var t=e._closeAlgorithm();Zr(e),v(t,(function(){return function(e){e._inFlightCloseRequest._resolve(void 0),e._inFlightCloseRequest=void 0,"erroring"===e._state&&(e._storedError=void 0,void 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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\r\n***************************************************************************** */\r\n/* global Reflect, Promise, SuppressedError, Symbol */\r\n\r\nvar extendStatics = function(d, b) {\r\n extendStatics = Object.setPrototypeOf ||\r\n ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\r\n return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n if (typeof b !== \"function\" && b !== null)\r\n throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\r\n extendStatics(d, b);\r\n function __() { this.constructor = d; }\r\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\nexport var __assign = function() {\r\n __assign = Object.assign || function __assign(t) {\r\n for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n s = arguments[i];\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n }\r\n return t;\r\n }\r\n return __assign.apply(this, arguments);\r\n}\r\n\r\nexport function __rest(s, e) {\r\n var t = {};\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\r\n t[p] = s[p];\r\n if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\r\n for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {\r\n if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))\r\n t[p[i]] = s[p[i]];\r\n }\r\n return t;\r\n}\r\n\r\nexport function __decorate(decorators, target, key, desc) {\r\n var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\r\n if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\r\n else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\r\n return c > 3 && r && Object.defineProperty(target, key, r), r;\r\n}\r\n\r\nexport function __param(paramIndex, decorator) {\r\n return function (target, key) { decorator(target, key, paramIndex); }\r\n}\r\n\r\nexport function __esDecorate(ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {\r\n function accept(f) { if (f !== void 0 && typeof f !== \"function\") throw new TypeError(\"Function expected\"); return f; }\r\n var kind = contextIn.kind, key = kind === \"getter\" ? \"get\" : kind === \"setter\" ? \"set\" : \"value\";\r\n var target = !descriptorIn && ctor ? contextIn[\"static\"] ? ctor : ctor.prototype : null;\r\n var descriptor = descriptorIn || (target ? Object.getOwnPropertyDescriptor(target, contextIn.name) : {});\r\n var _, done = false;\r\n for (var i = decorators.length - 1; i >= 0; i--) {\r\n var context = {};\r\n for (var p in contextIn) context[p] = p === \"access\" ? {} : contextIn[p];\r\n for (var p in contextIn.access) context.access[p] = contextIn.access[p];\r\n context.addInitializer = function (f) { if (done) throw new TypeError(\"Cannot add initializers after decoration has completed\"); extraInitializers.push(accept(f || null)); };\r\n var result = (0, decorators[i])(kind === \"accessor\" ? { get: descriptor.get, set: descriptor.set } : descriptor[key], context);\r\n if (kind === \"accessor\") {\r\n if (result === void 0) continue;\r\n if (result === null || typeof result !== \"object\") throw new TypeError(\"Object expected\");\r\n if (_ = accept(result.get)) descriptor.get = _;\r\n if (_ = accept(result.set)) descriptor.set = _;\r\n if (_ = accept(result.init)) initializers.unshift(_);\r\n }\r\n else if (_ = accept(result)) {\r\n if (kind === \"field\") initializers.unshift(_);\r\n else descriptor[key] = _;\r\n }\r\n }\r\n if (target) Object.defineProperty(target, contextIn.name, descriptor);\r\n done = true;\r\n};\r\n\r\nexport function __runInitializers(thisArg, initializers, value) {\r\n var useValue = arguments.length > 2;\r\n for (var i = 0; i < initializers.length; i++) {\r\n value = useValue ? initializers[i].call(thisArg, value) : initializers[i].call(thisArg);\r\n }\r\n return useValue ? value : void 0;\r\n};\r\n\r\nexport function __propKey(x) {\r\n return typeof x === \"symbol\" ? x : \"\".concat(x);\r\n};\r\n\r\nexport function __setFunctionName(f, name, prefix) {\r\n if (typeof name === \"symbol\") name = name.description ? \"[\".concat(name.description, \"]\") : \"\";\r\n return Object.defineProperty(f, \"name\", { configurable: true, value: prefix ? \"\".concat(prefix, \" \", name) : name });\r\n};\r\n\r\nexport function __metadata(metadataKey, metadataValue) {\r\n if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(metadataKey, metadataValue);\r\n}\r\n\r\nexport function __awaiter(thisArg, _arguments, P, generator) {\r\n function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }\r\n return new (P || (P = Promise))(function (resolve, reject) {\r\n function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\r\n function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\r\n function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }\r\n step((generator = generator.apply(thisArg, _arguments || [])).next());\r\n });\r\n}\r\n\r\nexport function __generator(thisArg, body) {\r\n var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n function verb(n) { return function (v) { return step([n, v]); }; }\r\n function step(op) {\r\n if (f) throw new TypeError(\"Generator is already executing.\");\r\n while (g && (g = 0, op[0] && (_ = 0)), _) try {\r\n if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\r\n if (y = 0, t) op = [op[0] & 2, t.value];\r\n switch (op[0]) {\r\n case 0: case 1: t = op; break;\r\n case 4: _.label++; return { value: op[1], done: false };\r\n case 5: _.label++; y = op[1]; op = [0]; continue;\r\n case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n default:\r\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n if (t[2]) _.ops.pop();\r\n _.trys.pop(); continue;\r\n }\r\n op = body.call(thisArg, _);\r\n } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n }\r\n}\r\n\r\nexport var __createBinding = Object.create ? (function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n var desc = Object.getOwnPropertyDescriptor(m, k);\r\n if (!desc || (\"get\" in desc ? !m.__esModule : desc.writable || desc.configurable)) {\r\n desc = { enumerable: true, get: function() { return m[k]; } };\r\n }\r\n Object.defineProperty(o, k2, desc);\r\n}) : (function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n o[k2] = m[k];\r\n});\r\n\r\nexport function __exportStar(m, o) {\r\n for (var p in m) if (p !== \"default\" && !Object.prototype.hasOwnProperty.call(o, p)) __createBinding(o, m, p);\r\n}\r\n\r\nexport function __values(o) {\r\n var s = typeof Symbol === \"function\" && Symbol.iterator, m = s && o[s], i = 0;\r\n if (m) return m.call(o);\r\n if (o && typeof o.length === \"number\") return {\r\n next: function () {\r\n if (o && i >= o.length) o = void 0;\r\n return { value: o && o[i++], done: !o };\r\n }\r\n };\r\n throw new TypeError(s ? \"Object is not iterable.\" : \"Symbol.iterator is not defined.\");\r\n}\r\n\r\nexport function __read(o, n) {\r\n var m = typeof Symbol === \"function\" && o[Symbol.iterator];\r\n if (!m) return o;\r\n var i = m.call(o), r, ar = [], e;\r\n try {\r\n while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\r\n }\r\n catch (error) { e = { error: error }; }\r\n finally {\r\n try {\r\n if (r && !r.done && (m = i[\"return\"])) m.call(i);\r\n }\r\n finally { if (e) throw e.error; }\r\n }\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spread() {\r\n for (var ar = [], i = 0; i < arguments.length; i++)\r\n ar = ar.concat(__read(arguments[i]));\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spreadArrays() {\r\n for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;\r\n for (var r = Array(s), k = 0, i = 0; i < il; i++)\r\n for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)\r\n r[k] = a[j];\r\n return r;\r\n}\r\n\r\nexport function __spreadArray(to, from, pack) {\r\n if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {\r\n if (ar || !(i in from)) {\r\n if (!ar) ar = Array.prototype.slice.call(from, 0, i);\r\n ar[i] = from[i];\r\n }\r\n }\r\n return to.concat(ar || Array.prototype.slice.call(from));\r\n}\r\n\r\nexport function __await(v) {\r\n return this instanceof __await ? (this.v = v, this) : new __await(v);\r\n}\r\n\r\nexport function __asyncGenerator(thisArg, _arguments, generator) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var g = generator.apply(thisArg, _arguments || []), i, q = [];\r\n return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\r\n function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\r\n function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\r\n function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n function fulfill(value) { resume(\"next\", value); }\r\n function reject(value) { resume(\"throw\", value); }\r\n function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n var i, p;\r\n return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var m = o[Symbol.asyncIterator], i;\r\n return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n return cooked;\r\n};\r\n\r\nvar __setModuleDefault = Object.create ? (function(o, v) {\r\n Object.defineProperty(o, \"default\", { enumerable: true, value: v });\r\n}) : function(o, v) {\r\n o[\"default\"] = v;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n if (mod && mod.__esModule) return mod;\r\n var result = {};\r\n if (mod != null) for (var k in mod) if (k !== \"default\" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);\r\n __setModuleDefault(result, mod);\r\n return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n\r\nexport function __classPrivateFieldGet(receiver, state, kind, f) {\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a getter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot read private member from an object whose class did not declare it\");\r\n return kind === \"m\" ? f : kind === \"a\" ? f.call(receiver) : f ? f.value : state.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, state, value, kind, f) {\r\n if (kind === \"m\") throw new TypeError(\"Private method is not writable\");\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a setter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot write private member to an object whose class did not declare it\");\r\n return (kind === \"a\" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;\r\n}\r\n\r\nexport function __classPrivateFieldIn(state, receiver) {\r\n if (receiver === null || (typeof receiver !== \"object\" && typeof receiver !== \"function\")) throw new TypeError(\"Cannot use 'in' operator on non-object\");\r\n return typeof state === \"function\" ? receiver === state : state.has(receiver);\r\n}\r\n\r\nexport function __addDisposableResource(env, value, async) {\r\n if (value !== null && value !== void 0) {\r\n if (typeof value !== \"object\" && typeof value !== \"function\") throw new TypeError(\"Object expected.\");\r\n var dispose;\r\n if (async) {\r\n if (!Symbol.asyncDispose) throw new TypeError(\"Symbol.asyncDispose is not defined.\");\r\n dispose = value[Symbol.asyncDispose];\r\n }\r\n if (dispose === void 0) {\r\n if (!Symbol.dispose) throw new TypeError(\"Symbol.dispose is not defined.\");\r\n dispose = value[Symbol.dispose];\r\n }\r\n if (typeof dispose !== \"function\") throw new TypeError(\"Object not disposable.\");\r\n env.stack.push({ value: value, dispose: dispose, async: async });\r\n }\r\n else if (async) {\r\n env.stack.push({ async: true });\r\n }\r\n return value;\r\n}\r\n\r\nvar _SuppressedError = typeof SuppressedError === \"function\" ? SuppressedError : function (error, suppressed, message) {\r\n var e = new Error(message);\r\n return e.name = \"SuppressedError\", e.error = error, e.suppressed = suppressed, e;\r\n};\r\n\r\nexport function __disposeResources(env) {\r\n function fail(e) {\r\n env.error = env.hasError ? new _SuppressedError(e, env.error, \"An error was suppressed during disposal.\") : e;\r\n env.hasError = true;\r\n }\r\n function next() {\r\n while (env.stack.length) {\r\n var rec = env.stack.pop();\r\n try {\r\n var result = rec.dispose && rec.dispose.call(rec.value);\r\n if (rec.async) return Promise.resolve(result).then(next, function(e) { fail(e); return next(); });\r\n }\r\n catch (e) {\r\n fail(e);\r\n }\r\n }\r\n if (env.hasError) throw env.error;\r\n }\r\n return next();\r\n}\r\n\r\nexport default {\r\n __extends: __extends,\r\n __assign: __assign,\r\n __rest: __rest,\r\n __decorate: __decorate,\r\n __param: __param,\r\n __metadata: __metadata,\r\n __awaiter: __awaiter,\r\n __generator: __generator,\r\n __createBinding: __createBinding,\r\n __exportStar: __exportStar,\r\n __values: __values,\r\n __read: __read,\r\n __spread: __spread,\r\n __spreadArrays: __spreadArrays,\r\n __spreadArray: __spreadArray,\r\n __await: __await,\r\n __asyncGenerator: __asyncGenerator,\r\n __asyncDelegator: __asyncDelegator,\r\n __asyncValues: __asyncValues,\r\n __makeTemplateObject: __makeTemplateObject,\r\n __importStar: __importStar,\r\n __importDefault: __importDefault,\r\n __classPrivateFieldGet: __classPrivateFieldGet,\r\n __classPrivateFieldSet: __classPrivateFieldSet,\r\n __classPrivateFieldIn: __classPrivateFieldIn,\r\n __addDisposableResource: __addDisposableResource,\r\n __disposeResources: __disposeResources,\r\n};\r\n","export function noop(): undefined {\n return undefined;\n}\n","import { noop } from '../../utils';\nimport { AssertionError } from '../../stub/assert';\n\nexport function typeIsObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport const rethrowAssertionErrorRejection: (e: any) => void =\n DEBUG ? e => {\n // Used throughout the reference implementation, as `.catch(rethrowAssertionErrorRejection)`, to ensure any errors\n // get shown. There are places in the spec where we do promise transformations and purposefully ignore or don't\n // expect any errors, but assertion errors are always problematic.\n if (e && e instanceof AssertionError) {\n setTimeout(() => {\n throw e;\n }, 0);\n }\n } : noop;\n\nexport function setFunctionName(fn: Function, name: string): void {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n } catch {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n}\n","import { rethrowAssertionErrorRejection } from './miscellaneous';\nimport assert from '../../stub/assert';\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\n\n// https://webidl.spec.whatwg.org/#a-new-promise\nexport function newPromise(executor: (\n resolve: (value: T | PromiseLike) => void,\n reject: (reason?: any) => void\n) => void): Promise {\n return new originalPromise(executor);\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-resolved-with\nexport function promiseResolvedWith(value: T | PromiseLike): Promise {\n return newPromise(resolve => resolve(value));\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-rejected-with\nexport function promiseRejectedWith(reason: any): Promise {\n return originalPromiseReject(reason);\n}\n\nexport function PerformPromiseThen(\n promise: Promise,\n onFulfilled?: (value: T) => TResult1 | PromiseLike,\n onRejected?: (reason: any) => TResult2 | PromiseLike): Promise {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected) as Promise;\n}\n\n// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n// from that handler. To prevent this, return null instead of void from all handlers.\n// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\nexport function uponPromise(\n promise: Promise,\n onFulfilled?: (value: T) => null | PromiseLike,\n onRejected?: (reason: any) => null | PromiseLike): void {\n PerformPromiseThen(\n PerformPromiseThen(promise, onFulfilled, onRejected),\n undefined,\n rethrowAssertionErrorRejection\n );\n}\n\nexport function uponFulfillment(promise: Promise, onFulfilled: (value: T) => null | PromiseLike): void {\n uponPromise(promise, onFulfilled);\n}\n\nexport function uponRejection(promise: Promise, onRejected: (reason: any) => null | PromiseLike): void {\n uponPromise(promise, undefined, onRejected);\n}\n\nexport function transformPromiseWith(\n promise: Promise,\n fulfillmentHandler?: (value: T) => TResult1 | PromiseLike,\n rejectionHandler?: (reason: any) => TResult2 | PromiseLike): Promise {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\n\nexport function setPromiseIsHandledToTrue(promise: Promise): void {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\nlet _queueMicrotask: (callback: () => void) => void = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n } else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n};\n\nexport { _queueMicrotask as queueMicrotask };\n\nexport function reflectCall(F: (this: T, ...fnArgs: A) => R, V: T, args: A): R {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n}\n\nexport function promiseCall(F: (this: T, ...fnArgs: A) => R | PromiseLike,\n V: T,\n args: A): Promise {\n assert(typeof F === 'function');\n assert(V !== undefined);\n assert(Array.isArray(args));\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n } catch (value) {\n return promiseRejectedWith(value);\n }\n}\n","import assert from '../stub/assert';\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n\ninterface Node {\n _elements: T[];\n _next: Node | undefined;\n}\n\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nexport class SimpleQueue {\n private _front: Node;\n private _back: Node;\n private _cursor = 0;\n private _size = 0;\n\n constructor() {\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n\n get length(): number {\n return this._size;\n }\n\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element: T): void {\n const oldBack = this._back;\n let newBack = oldBack;\n assert(oldBack._next === undefined);\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n assert(elements.length === QUEUE_MAX_ARRAY_SIZE);\n assert(oldFront._next !== undefined);\n newFront = oldFront._next!;\n newCursor = 0;\n }\n\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined!;\n\n return element;\n }\n\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback: (element: T) => void): void {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n assert(node._next !== undefined);\n assert(i === QUEUE_MAX_ARRAY_SIZE);\n node = node._next!;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n}\n","export const AbortSteps = Symbol('[[AbortSteps]]');\nexport const ErrorSteps = Symbol('[[ErrorSteps]]');\nexport const CancelSteps = Symbol('[[CancelSteps]]');\nexport const PullSteps = Symbol('[[PullSteps]]');\nexport const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n","import assert from '../../stub/assert';\nimport { ReadableStream, ReadableStreamCancel, type ReadableStreamReader } from '../readable-stream';\nimport { newPromise, setPromiseIsHandledToTrue } from '../helpers/webidl';\nimport { ReleaseSteps } from '../abstract-ops/internal-methods';\n\nexport function ReadableStreamReaderGenericInitialize(reader: ReadableStreamReader, stream: ReadableStream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n } else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n } else {\n assert(stream._state === 'errored');\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n}\n\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\n\nexport function ReadableStreamReaderGenericCancel(reader: ReadableStreamReader, reason: any): Promise {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n return ReadableStreamCancel(stream, reason);\n}\n\nexport function ReadableStreamReaderGenericRelease(reader: ReadableStreamReader) {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n assert(stream._reader === reader);\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n } else {\n defaultReaderClosedPromiseResetToRejected(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n\n stream._readableStreamController[ReleaseSteps]();\n\n stream._reader = undefined;\n reader._ownerReadableStream = undefined!;\n}\n\n// Helper functions for the readers.\n\nexport function readerLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nexport function defaultReaderClosedPromiseInitialize(reader: ReadableStreamReader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n}\n\nexport function defaultReaderClosedPromiseInitializeAsRejected(reader: ReadableStreamReader, reason: any) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseInitializeAsResolved(reader: ReadableStreamReader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n}\n\nexport function defaultReaderClosedPromiseReject(reader: ReadableStreamReader, reason: any) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n\nexport function defaultReaderClosedPromiseResetToRejected(reader: ReadableStreamReader, reason: any) {\n assert(reader._closedPromise_resolve === undefined);\n assert(reader._closedPromise_reject === undefined);\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseResolve(reader: ReadableStreamReader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite: typeof Number.isFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n};\n\nexport default NumberIsFinite;\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc: typeof Math.trunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\nexport default MathTrunc;\n","import NumberIsFinite from '../../stub/number-isfinite';\nimport MathTrunc from '../../stub/math-trunc';\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nexport function isDictionary(x: any): x is object | null {\n return typeof x === 'object' || typeof x === 'function';\n}\n\nexport function assertDictionary(obj: unknown,\n context: string): asserts obj is object | null | undefined {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport type AnyFunction = (...args: any[]) => any;\n\n// https://heycam.github.io/webidl/#idl-callback-functions\nexport function assertFunction(x: unknown, context: string): asserts x is AnyFunction {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-object\nexport function isObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport function assertObject(x: unknown,\n context: string): asserts x is object {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport function assertRequiredArgument(x: T | undefined,\n position: number,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n}\n\nexport function assertRequiredField(x: T | undefined,\n field: string,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nexport function convertUnrestrictedDouble(value: unknown): number {\n return Number(value);\n}\n\nfunction censorNegativeZero(x: number): number {\n return x === 0 ? 0 : x;\n}\n\nfunction integerPart(x: number): number {\n return censorNegativeZero(MathTrunc(x));\n}\n\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nexport function convertUnsignedLongLongWithEnforceRange(value: unknown, context: string): number {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n\n let x = Number(value);\n x = censorNegativeZero(x);\n\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n\n x = integerPart(x);\n\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n\n return x;\n}\n","import { IsReadableStream, ReadableStream } from '../readable-stream';\n\nexport function assertReadableStream(x: unknown, context: string): asserts x is ReadableStream {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, ReadableStream } from '../readable-stream';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { PullSteps } from '../abstract-ops/internal-methods';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\n\n/**\n * A result returned by {@link ReadableStreamDefaultReader.read}.\n *\n * @public\n */\nexport type ReadableStreamDefaultReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value?: undefined;\n}\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamDefaultReader(stream: ReadableStream): ReadableStreamDefaultReader {\n return new ReadableStreamDefaultReader(stream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadRequest(stream: ReadableStream,\n readRequest: ReadRequest): void {\n assert(IsReadableStreamDefaultReader(stream._reader));\n assert(stream._state === 'readable');\n\n (stream._reader! as ReadableStreamDefaultReader)._readRequests.push(readRequest);\n}\n\nexport function ReadableStreamFulfillReadRequest(stream: ReadableStream, chunk: R | undefined, done: boolean) {\n const reader = stream._reader as ReadableStreamDefaultReader;\n\n assert(reader._readRequests.length > 0);\n\n const readRequest = reader._readRequests.shift()!;\n if (done) {\n readRequest._closeSteps();\n } else {\n readRequest._chunkSteps(chunk!);\n }\n}\n\nexport function ReadableStreamGetNumReadRequests(stream: ReadableStream): number {\n return (stream._reader as ReadableStreamDefaultReader)._readRequests.length;\n}\n\nexport function ReadableStreamHasDefaultReader(stream: ReadableStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadRequest {\n _chunkSteps(chunk: R): void;\n\n _closeSteps(): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamDefaultReader {\n /** @internal */\n _ownerReadableStream!: ReadableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(): Promise> {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamDefaultReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamDefaultReader(x: any): x is ReadableStreamDefaultReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultReader;\n}\n\nexport function ReadableStreamDefaultReaderRead(reader: ReadableStreamDefaultReader,\n readRequest: ReadRequest): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n } else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n } else {\n assert(stream._state === 'readable');\n stream._readableStreamController[PullSteps](readRequest as ReadRequest);\n }\n}\n\nexport function ReadableStreamDefaultReaderRelease(reader: ReadableStreamDefaultReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n}\n\nexport function ReadableStreamDefaultReaderErrorReadRequests(reader: ReadableStreamDefaultReader, e: any) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nfunction defaultReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n","import { reflectCall } from 'lib/helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport assert from '../../stub/assert';\n\ndeclare global {\n interface ArrayBuffer {\n readonly detached: boolean;\n\n transfer(): ArrayBuffer;\n }\n\n function structuredClone(value: T, options: { transfer: ArrayBuffer[] }): T;\n}\n\nexport function CreateArrayFromList(elements: T): T {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice() as T;\n}\n\nexport function CopyDataBlockBytes(dest: ArrayBuffer,\n destOffset: number,\n src: ArrayBuffer,\n srcOffset: number,\n n: number) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n\nexport let TransferArrayBuffer = (O: ArrayBuffer): ArrayBuffer => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n } else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n } else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n};\n\nexport function CanTransferArrayBuffer(O: ArrayBuffer): boolean {\n return !IsDetachedBuffer(O);\n}\n\nexport let IsDetachedBuffer = (O: ArrayBuffer): boolean => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n } else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n};\n\nexport function ArrayBufferSlice(buffer: ArrayBuffer, begin: number, end: number): ArrayBuffer {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n}\n\nexport type MethodName = {\n [P in keyof T]: T[P] extends Function | undefined ? P : never;\n}[keyof T];\n\nexport function GetMethod>(receiver: T, prop: K): T[K] | undefined {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n}\n\nexport interface SyncIteratorRecord {\n iterator: Iterator,\n nextMethod: Iterator['next'],\n done: boolean;\n}\n\nexport interface AsyncIteratorRecord {\n iterator: AsyncIterator,\n nextMethod: AsyncIterator['next'],\n done: boolean;\n}\n\nexport type SyncOrAsyncIteratorRecord = SyncIteratorRecord | AsyncIteratorRecord;\n\nexport function CreateAsyncFromSyncIterator(syncIteratorRecord: SyncIteratorRecord): AsyncIteratorRecord {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n}\n\n// Aligns with core-js/modules/es.symbol.async-iterator.js\nexport const SymbolAsyncIterator: (typeof Symbol)['asyncIterator'] =\n Symbol.asyncIterator ??\n Symbol.for?.('Symbol.asyncIterator') ??\n '@@asyncIterator';\n\nexport type SyncOrAsyncIterable = Iterable | AsyncIterable;\nexport type SyncOrAsyncIteratorMethod = () => (Iterator | AsyncIterator);\n\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint: 'async',\n method?: SyncOrAsyncIteratorMethod\n): AsyncIteratorRecord;\nfunction GetIterator(\n obj: Iterable,\n hint: 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncIteratorRecord;\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint = 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncOrAsyncIteratorRecord {\n assert(hint === 'sync' || hint === 'async');\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj as AsyncIterable, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj as Iterable, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj as Iterable, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n } else {\n method = GetMethod(obj as Iterable, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false } as SyncOrAsyncIteratorRecord;\n}\n\nexport { GetIterator };\n\nexport function IteratorNext(iteratorRecord: AsyncIteratorRecord): Promise> {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n}\n\nexport function IteratorComplete(\n iterResult: IteratorResult\n): iterResult is IteratorReturnResult {\n assert(typeIsObject(iterResult));\n return Boolean(iterResult.done);\n}\n\nexport function IteratorValue(iterResult: IteratorYieldResult): T {\n assert(typeIsObject(iterResult));\n return iterResult.value;\n}\n","/// \n\nimport { SymbolAsyncIterator } from '../../../lib/abstract-ops/ecmascript';\n\n// We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it.\nexport const AsyncIteratorPrototype: AsyncIterable = {\n // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( )\n // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator\n [SymbolAsyncIterator](this: AsyncIterator) {\n return this;\n }\n};\nObject.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false });\n","/// \n\nimport { ReadableStream } from '../readable-stream';\nimport {\n AcquireReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadableStreamDefaultReadResult,\n type ReadRequest\n} from './default-reader';\nimport { ReadableStreamReaderGenericCancel, ReadableStreamReaderGenericRelease } from './generic-reader';\nimport assert from '../../stub/assert';\nimport { AsyncIteratorPrototype } from '@@target/stub/async-iterator-prototype';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n queueMicrotask,\n transformPromiseWith\n} from '../helpers/webidl';\n\n/**\n * An async iterator returned by {@link ReadableStream.values}.\n *\n * @public\n */\nexport interface ReadableStreamAsyncIterator extends AsyncIterableIterator {\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nexport class ReadableStreamAsyncIteratorImpl {\n private readonly _reader: ReadableStreamDefaultReader;\n private readonly _preventCancel: boolean;\n private _ongoingPromise: Promise> | undefined = undefined;\n private _isFinished = false;\n\n constructor(reader: ReadableStreamDefaultReader, preventCancel: boolean) {\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n\n next(): Promise> {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n\n return(value: any): Promise> {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n\n private _nextSteps(): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n\n private _returnSteps(value: any): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n assert(reader._readRequests.length === 0);\n\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n}\n\ninterface ReadableStreamAsyncIteratorInstance extends ReadableStreamAsyncIterator {\n /** @interal */\n _asyncIteratorImpl: ReadableStreamAsyncIteratorImpl;\n\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nconst ReadableStreamAsyncIteratorPrototype: ReadableStreamAsyncIteratorInstance = {\n next(this: ReadableStreamAsyncIteratorInstance): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n\n return(this: ReadableStreamAsyncIteratorInstance, value: any): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n} as any;\nObject.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamAsyncIterator(stream: ReadableStream,\n preventCancel: boolean): ReadableStreamAsyncIterator {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator: ReadableStreamAsyncIteratorInstance = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n}\n\nfunction IsReadableStreamAsyncIterator(x: any): x is ReadableStreamAsyncIterator {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n\n try {\n // noinspection SuspiciousTypeOfGuard\n return (x as ReadableStreamAsyncIteratorInstance)._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n } catch {\n return false;\n }\n}\n\n// Helper functions for the ReadableStream.\n\nfunction streamAsyncIteratorBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN: typeof Number.isNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n};\n\nexport default NumberIsNaN;\n","import NumberIsNaN from '../../stub/number-isnan';\nimport { ArrayBufferSlice } from './ecmascript';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function IsNonNegativeNumber(v: number): boolean {\n if (typeof v !== 'number') {\n return false;\n }\n\n if (NumberIsNaN(v)) {\n return false;\n }\n\n if (v < 0) {\n return false;\n }\n\n return true;\n}\n\nexport function CloneAsUint8Array(O: NonShared): NonShared {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer) as NonShared;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsNonNegativeNumber } from './miscellaneous';\n\nexport interface QueueContainer {\n _queue: SimpleQueue;\n _queueTotalSize: number;\n}\n\nexport interface QueuePair {\n value: T;\n size: number;\n}\n\nexport function DequeueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.shift()!;\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n\n return pair.value;\n}\n\nexport function EnqueueValueWithSize(container: QueueContainer>, value: T, size: number) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n}\n\nexport function PeekQueueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.peek();\n return pair.value;\n}\n\nexport function ResetQueue(container: QueueContainer) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n}\n","export type TypedArray =\n | Int8Array\n | Uint8Array\n | Uint8ClampedArray\n | Int16Array\n | Uint16Array\n | Int32Array\n | Uint32Array\n | Float32Array\n | Float64Array;\n\nexport type NonShared = T & {\n buffer: ArrayBuffer;\n}\n\nexport interface ArrayBufferViewConstructor {\n new(buffer: ArrayBuffer, byteOffset: number, length?: number): T;\n\n readonly prototype: T;\n}\n\nexport interface TypedArrayConstructor extends ArrayBufferViewConstructor {\n readonly BYTES_PER_ELEMENT: number;\n}\n\nexport type DataViewConstructor = ArrayBufferViewConstructor;\n\nfunction isDataViewConstructor(ctor: Function): ctor is DataViewConstructor {\n return ctor === DataView;\n}\n\nexport function isDataView(view: ArrayBufferView): view is DataView {\n return isDataViewConstructor(view.constructor);\n}\n\nexport function arrayBufferViewElementSize(ctor: ArrayBufferViewConstructor): number {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return (ctor as unknown as TypedArrayConstructor).BYTES_PER_ELEMENT;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n IsReadableStreamDefaultReader,\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n ReadableStreamHasDefaultReader,\n type ReadRequest\n} from './default-reader';\nimport {\n ReadableStreamAddReadIntoRequest,\n ReadableStreamFulfillReadIntoRequest,\n ReadableStreamGetNumReadIntoRequests,\n ReadableStreamHasBYOBReader,\n type ReadIntoRequest\n} from './byob-reader';\nimport NumberIsInteger from '../../stub/number-isinteger';\nimport {\n IsReadableStreamLocked,\n type ReadableByteStream,\n ReadableStreamClose,\n ReadableStreamError\n} from '../readable-stream';\nimport type { ValidatedUnderlyingByteSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport {\n ArrayBufferSlice,\n CanTransferArrayBuffer,\n CopyDataBlockBytes,\n IsDetachedBuffer,\n TransferArrayBuffer\n} from '../abstract-ops/ecmascript';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\nimport { assertRequiredArgument, convertUnsignedLongLongWithEnforceRange } from '../validators/basic';\nimport {\n type ArrayBufferViewConstructor,\n arrayBufferViewElementSize,\n type NonShared,\n type TypedArrayConstructor\n} from '../helpers/array-buffer-view';\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nexport class ReadableStreamBYOBRequest {\n /** @internal */\n _associatedReadableByteStreamController!: ReadableByteStreamController;\n /** @internal */\n _view!: NonShared | null;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view(): ArrayBufferView | null {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n\n return this._view;\n }\n\n /**\n * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into\n * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer.\n *\n * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer\n * modifiable.\n */\n respond(bytesWritten: number): void;\n respond(bytesWritten: number | undefined): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(this._view!.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n\n assert(this._view!.byteLength > 0);\n assert(this._view!.buffer.byteLength > 0);\n\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n\n /**\n * Indicates to the associated readable byte stream that instead of writing into\n * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`,\n * which will be given to the consumer of the readable byte stream.\n *\n * After this method is called, `view` will be transferred and no longer modifiable.\n */\n respondWithNewView(view: ArrayBufferView): void;\n respondWithNewView(view: NonShared): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n}\n\ninterface ByteQueueElement {\n buffer: ArrayBuffer;\n byteOffset: number;\n byteLength: number;\n}\n\ntype PullIntoDescriptor = NonShared> =\n DefaultPullIntoDescriptor\n | BYOBPullIntoDescriptor;\n\ninterface DefaultPullIntoDescriptor {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: TypedArrayConstructor;\n readerType: 'default' | 'none';\n}\n\ninterface BYOBPullIntoDescriptor = NonShared> {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: ArrayBufferViewConstructor;\n readerType: 'byob' | 'none';\n}\n\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableByteStreamController {\n /** @internal */\n _controlledReadableByteStream!: ReadableByteStream;\n /** @internal */\n _queue!: SimpleQueue;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n /** @internal */\n _autoAllocateChunkSize: number | undefined;\n /** @internal */\n _byobRequest: ReadableStreamBYOBRequest | null;\n /** @internal */\n _pendingPullIntos!: SimpleQueue;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest(): ReadableStreamBYOBRequest | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n\n ReadableByteStreamControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk chunk in the controlled readable stream.\n * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown.\n */\n enqueue(chunk: ArrayBufferView): void;\n enqueue(chunk: NonShared): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n\n ReadableByteStreamControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n\n ResetQueue(this);\n\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest>): void {\n const stream = this._controlledReadableByteStream;\n assert(ReadableStreamHasDefaultReader(stream));\n\n if (this._queueTotalSize > 0) {\n assert(ReadableStreamGetNumReadRequests(stream) === 0);\n\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer: ArrayBuffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n } catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n\n const pullIntoDescriptor: DefaultPullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n}\n\nObject.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableByteStreamController.prototype.close, 'close');\nsetFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableByteStreamController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableByteStreamController.\n\nexport function IsReadableByteStreamController(x: any): x is ReadableByteStreamController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n\n return x instanceof ReadableByteStreamController;\n}\n\nfunction IsReadableStreamBYOBRequest(x: any): x is ReadableStreamBYOBRequest {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBRequest;\n}\n\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller: ReadableByteStreamController): void {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller: ReadableByteStreamController) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n}\n\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor>(\n stream: ReadableByteStream,\n pullIntoDescriptor: PullIntoDescriptor\n) {\n assert(stream._state !== 'errored');\n assert(pullIntoDescriptor.readerType !== 'none');\n\n let done = false;\n if (stream._state === 'closed') {\n assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);\n done = true;\n }\n\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView as unknown as NonShared, done);\n } else {\n assert(pullIntoDescriptor.readerType === 'byob');\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n}\n\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor>(\n pullIntoDescriptor: PullIntoDescriptor\n): T {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n\n assert(bytesFilled <= pullIntoDescriptor.byteLength);\n assert(bytesFilled % elementSize === 0);\n\n return new pullIntoDescriptor.viewConstructor(\n pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize) as T;\n}\n\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n}\n\nfunction ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n } catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n}\n\nfunction ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.readerType === 'none');\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n firstDescriptor.buffer,\n firstDescriptor.byteOffset,\n firstDescriptor.bytesFilled\n );\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n}\n\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller: ReadableByteStreamController,\n pullIntoDescriptor: PullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize,\n pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n\n const queue = controller._queue;\n\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n } else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n\n if (!ready) {\n assert(controller._queueTotalSize === 0);\n assert(pullIntoDescriptor.bytesFilled > 0);\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n }\n\n return ready;\n}\n\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller: ReadableByteStreamController,\n size: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);\n assert(controller._byobRequest === null);\n pullIntoDescriptor.bytesFilled += size;\n}\n\nfunction ReadableByteStreamControllerHandleQueueDrain(controller: ReadableByteStreamController) {\n assert(controller._controlledReadableByteStream._state === 'readable');\n\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n } else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n}\n\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller: ReadableByteStreamController) {\n if (controller._byobRequest === null) {\n return;\n }\n\n controller._byobRequest._associatedReadableByteStreamController = undefined!;\n controller._byobRequest._view = null!;\n controller._byobRequest = null;\n}\n\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller: ReadableByteStreamController) {\n assert(!controller._closeRequested);\n\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n assert(pullIntoDescriptor.readerType !== 'none');\n\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n ReadableByteStreamControllerCommitPullIntoDescriptor(\n controller._controlledReadableByteStream,\n pullIntoDescriptor\n );\n }\n }\n}\n\nfunction ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller: ReadableByteStreamController) {\n const reader = controller._controlledReadableByteStream._reader;\n assert(IsReadableStreamDefaultReader(reader));\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n}\n\nexport function ReadableByteStreamControllerPullInto>(\n controller: ReadableByteStreamController,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = controller._controlledReadableByteStream;\n\n const ctor = view.constructor as ArrayBufferViewConstructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n\n const { byteOffset, byteLength } = view;\n\n const minimumFill = min * elementSize;\n assert(minimumFill >= elementSize && minimumFill <= byteLength);\n assert(minimumFill % elementSize === 0);\n\n let buffer: ArrayBuffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n } catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n\n const pullIntoDescriptor: BYOBPullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInClosedState(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.bytesFilled % firstDescriptor.elementSize === 0);\n\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n}\n\nfunction ReadableByteStreamControllerRespondInReadableState(controller: ReadableByteStreamController,\n bytesWritten: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n pullIntoDescriptor.buffer,\n end - remainderSize,\n remainderSize\n );\n }\n\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInternal(controller: ReadableByteStreamController, bytesWritten: number) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n assert(CanTransferArrayBuffer(firstDescriptor.buffer));\n\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n assert(bytesWritten === 0);\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n } else {\n assert(state === 'readable');\n assert(bytesWritten > 0);\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerShiftPendingPullInto(\n controller: ReadableByteStreamController\n): PullIntoDescriptor {\n assert(controller._byobRequest === null);\n const descriptor = controller._pendingPullIntos.shift()!;\n return descriptor;\n}\n\nfunction ReadableByteStreamControllerShouldCallPull(controller: ReadableByteStreamController): boolean {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return false;\n }\n\n if (controller._closeRequested) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableByteStreamControllerClearAlgorithms(controller: ReadableByteStreamController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\n\nexport function ReadableByteStreamControllerClose(controller: ReadableByteStreamController) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n\n return;\n }\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n throw e;\n }\n }\n\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n}\n\nexport function ReadableByteStreamControllerEnqueue(\n controller: ReadableByteStreamController,\n chunk: NonShared\n) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError(\n 'The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk'\n );\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n assert(controller._pendingPullIntos.length === 0);\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n } else {\n assert(controller._queue.length === 0);\n if (controller._pendingPullIntos.length > 0) {\n assert(controller._pendingPullIntos.peek().readerType === 'default');\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView as NonShared, false);\n }\n } else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n } else {\n assert(!IsReadableStreamLocked(stream));\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableByteStreamControllerError(controller: ReadableByteStreamController, e: any) {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableByteStreamControllerFillReadRequestFromQueue(\n controller: ReadableByteStreamController,\n readRequest: ReadRequest>\n) {\n assert(controller._queueTotalSize > 0);\n\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view as NonShared);\n}\n\nexport function ReadableByteStreamControllerGetBYOBRequest(\n controller: ReadableByteStreamController\n): ReadableStreamBYOBRequest | null {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer,\n firstDescriptor.byteOffset + firstDescriptor.bytesFilled,\n firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n\n const byobRequest: ReadableStreamBYOBRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view as NonShared);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n}\n\nfunction ReadableByteStreamControllerGetDesiredSize(controller: ReadableByteStreamController): number | null {\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nexport function ReadableByteStreamControllerRespond(controller: ReadableByteStreamController, bytesWritten: number) {\n assert(controller._pendingPullIntos.length > 0);\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n}\n\nexport function ReadableByteStreamControllerRespondWithNewView(controller: ReadableByteStreamController,\n view: NonShared) {\n assert(controller._pendingPullIntos.length > 0);\n assert(!IsDetachedBuffer(view.buffer));\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (view.byteLength === 0) {\n throw new TypeError(\n 'The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'\n );\n }\n }\n\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n}\n\nexport function SetUpReadableByteStreamController(stream: ReadableByteStream,\n controller: ReadableByteStreamController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n autoAllocateChunkSize: number | undefined) {\n assert(stream._readableStreamController === undefined);\n if (autoAllocateChunkSize !== undefined) {\n assert(NumberIsInteger(autoAllocateChunkSize));\n assert(autoAllocateChunkSize > 0);\n }\n\n controller._controlledReadableByteStream = stream;\n\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._byobRequest = null;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._closeRequested = false;\n controller._started = false;\n\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n\n controller._pendingPullIntos = new SimpleQueue();\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableByteStreamControllerFromUnderlyingSource(\n stream: ReadableByteStream,\n underlyingByteSource: ValidatedUnderlyingByteSource,\n highWaterMark: number\n) {\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n\n SetUpReadableByteStreamController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize\n );\n}\n\nfunction SetUpReadableStreamBYOBRequest(request: ReadableStreamBYOBRequest,\n controller: ReadableByteStreamController,\n view: NonShared) {\n assert(IsReadableByteStreamController(controller));\n assert(typeof view === 'object');\n assert(ArrayBuffer.isView(view));\n assert(!IsDetachedBuffer(view.buffer));\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n}\n\n// Helper functions for the ReadableStreamBYOBRequest.\n\nfunction byobRequestBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n}\n\n// Helper functions for the ReadableByteStreamController.\n\nfunction byteStreamControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, type ReadableByteStream, type ReadableStream } from '../readable-stream';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamController,\n ReadableByteStreamControllerPullInto\n} from './byte-stream-controller';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\nimport { IsDetachedBuffer } from '../abstract-ops/ecmascript';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from './reader-options';\nimport { convertByobReadOptions } from '../validators/reader-options';\nimport { isDataView, type NonShared, type TypedArray } from '../helpers/array-buffer-view';\n\n/**\n * A result returned by {@link ReadableStreamBYOBReader.read}.\n *\n * @public\n */\nexport type ReadableStreamBYOBReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value: T | undefined;\n};\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamBYOBReader(stream: ReadableByteStream): ReadableStreamBYOBReader {\n return new ReadableStreamBYOBReader(stream as ReadableStream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadIntoRequest>(\n stream: ReadableByteStream,\n readIntoRequest: ReadIntoRequest\n): void {\n assert(IsReadableStreamBYOBReader(stream._reader));\n assert(stream._state === 'readable' || stream._state === 'closed');\n\n (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);\n}\n\nexport function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,\n chunk: ArrayBufferView,\n done: boolean) {\n const reader = stream._reader as ReadableStreamBYOBReader;\n\n assert(reader._readIntoRequests.length > 0);\n\n const readIntoRequest = reader._readIntoRequests.shift()!;\n if (done) {\n readIntoRequest._closeSteps(chunk);\n } else {\n readIntoRequest._chunkSteps(chunk);\n }\n}\n\nexport function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {\n return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;\n}\n\nexport function ReadableStreamHasBYOBReader(stream: ReadableByteStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadIntoRequest> {\n _chunkSteps(chunk: T): void;\n\n _closeSteps(chunk: T | undefined): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamBYOBReader {\n /** @internal */\n _ownerReadableStream!: ReadableByteStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readIntoRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readIntoRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Attempts to reads bytes into view, and returns a promise resolved with the result.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(\n view: T,\n options?: ReadableStreamBYOBReaderReadOptions\n ): Promise>;\n read>(\n view: T,\n rawOptions: ReadableStreamBYOBReaderReadOptions | null | undefined = {}\n ): Promise> {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n\n let options: ValidatedReadableStreamBYOBReaderReadOptions;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > (view as unknown as TypedArray).length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n } else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamBYOBReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest: ReadIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamBYOBReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBReader;\n}\n\nexport function ReadableStreamBYOBReaderRead>(\n reader: ReadableStreamBYOBReader,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n } else {\n ReadableByteStreamControllerPullInto(\n stream._readableStreamController as ReadableByteStreamController,\n view,\n min,\n readIntoRequest\n );\n }\n}\n\nexport function ReadableStreamBYOBReaderRelease(reader: ReadableStreamBYOBReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n}\n\nexport function ReadableStreamBYOBReaderErrorReadIntoRequests(reader: ReadableStreamBYOBReader, e: any) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamBYOBReader.\n\nfunction byobReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n}\n","import { assertDictionary, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from '../readable-stream/reader-options';\n\nexport function convertReaderOptions(options: ReadableStreamGetReaderOptions | null | undefined,\n context: string): ReadableStreamGetReaderOptions {\n assertDictionary(options, context);\n const mode = options?.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n}\n\nfunction convertReadableStreamReaderMode(mode: string, context: string): 'byob' {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n}\n\nexport function convertByobReadOptions(\n options: ReadableStreamBYOBReaderReadOptions | null | undefined,\n context: string\n): ValidatedReadableStreamBYOBReaderReadOptions {\n assertDictionary(options, context);\n const min = options?.min ?? 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(\n min,\n `${context} has member 'min' that`\n )\n };\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport NumberIsNaN from '../../stub/number-isnan';\n\nexport function ExtractHighWaterMark(strategy: QueuingStrategy, defaultHWM: number): number {\n const { highWaterMark } = strategy;\n\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n\n return highWaterMark;\n}\n\nexport function ExtractSizeAlgorithm(strategy: QueuingStrategy): QueuingStrategySizeCallback {\n const { size } = strategy;\n\n if (!size) {\n return () => 1;\n }\n\n return size;\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport { assertDictionary, assertFunction, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategy(init: QueuingStrategy | null | undefined,\n context: string): QueuingStrategy {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n const size = init?.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n}\n\nfunction convertQueuingStrategySize(fn: QueuingStrategySizeCallback,\n context: string): QueuingStrategySizeCallback {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from '../writable-stream/underlying-sink';\nimport { WritableStreamDefaultController } from '../writable-stream';\n\nexport function convertUnderlyingSink(original: UnderlyingSink | null,\n context: string): ValidatedUnderlyingSink {\n assertDictionary(original, context);\n const abort = original?.abort;\n const close = original?.close;\n const start = original?.start;\n const type = original?.type;\n const write = original?.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original!, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original!, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original!, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original!, `${context} has member 'write' that`),\n type\n };\n}\n\nfunction convertUnderlyingSinkAbortCallback(\n fn: UnderlyingSinkAbortCallback,\n original: UnderlyingSink,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSinkCloseCallback(\n fn: UnderlyingSinkCloseCallback,\n original: UnderlyingSink,\n context: string\n): () => Promise {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n}\n\nfunction convertUnderlyingSinkStartCallback(\n fn: UnderlyingSinkStartCallback,\n original: UnderlyingSink,\n context: string\n): UnderlyingSinkStartCallback {\n assertFunction(fn, context);\n return (controller: WritableStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSinkWriteCallback(\n fn: UnderlyingSinkWriteCallback,\n original: UnderlyingSink,\n context: string\n): (chunk: W, controller: WritableStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: W, controller: WritableStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n","import { IsWritableStream, WritableStream } from '../writable-stream';\n\nexport function assertWritableStream(x: unknown, context: string): asserts x is WritableStream {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n}\n","/**\n * A signal object that allows you to communicate with a request and abort it if required\n * via its associated `AbortController` object.\n *\n * @remarks\n * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @public\n */\nexport interface AbortSignal {\n /**\n * Whether the request is aborted.\n */\n readonly aborted: boolean;\n\n /**\n * If aborted, returns the reason for aborting.\n */\n readonly reason?: any;\n\n /**\n * Add an event listener to be triggered when this signal becomes aborted.\n */\n addEventListener(type: 'abort', listener: () => void): void;\n\n /**\n * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}.\n */\n removeEventListener(type: 'abort', listener: () => void): void;\n}\n\nexport function isAbortSignal(value: unknown): value is AbortSignal {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof (value as AbortSignal).aborted === 'boolean';\n } catch {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n}\n\n/**\n * A controller object that allows you to abort an `AbortSignal` when desired.\n *\n * @remarks\n * This interface is compatible with the `AbortController` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @internal\n */\nexport interface AbortController {\n readonly signal: AbortSignal;\n\n abort(reason?: any): void;\n}\n\ninterface AbortControllerConstructor {\n new(): AbortController;\n}\n\nconst supportsAbortController = typeof (AbortController as any) === 'function';\n\n/**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\nexport function createAbortController(): AbortController | undefined {\n if (supportsAbortController) {\n return new (AbortController as AbortControllerConstructor)();\n }\n return undefined;\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponPromise\n} from './helpers/webidl';\nimport {\n DequeueValue,\n EnqueueValueWithSize,\n PeekQueueValue,\n type QueuePair,\n ResetQueue\n} from './abstract-ops/queue-with-sizes';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { SimpleQueue } from './simple-queue';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { AbortSteps, ErrorSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from './writable-stream/underlying-sink';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertUnderlyingSink } from './validators/underlying-sink';\nimport { assertWritableStream } from './validators/writable-stream';\nimport { type AbortController, type AbortSignal, createAbortController } from './abort-signal';\n\ntype WritableStreamState = 'writable' | 'closed' | 'erroring' | 'errored';\n\ninterface WriteOrCloseRequest {\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n}\n\ntype WriteRequest = WriteOrCloseRequest;\ntype CloseRequest = WriteOrCloseRequest;\n\ninterface PendingAbortRequest {\n _promise: Promise;\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n _reason: any;\n _wasAlreadyErroring: boolean;\n}\n\n/**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\nclass WritableStream {\n /** @internal */\n _state!: WritableStreamState;\n /** @internal */\n _storedError: any;\n /** @internal */\n _writer: WritableStreamDefaultWriter | undefined;\n /** @internal */\n _writableStreamController!: WritableStreamDefaultController;\n /** @internal */\n _writeRequests!: SimpleQueue;\n /** @internal */\n _inFlightWriteRequest: WriteRequest | undefined;\n /** @internal */\n _closeRequest: CloseRequest | undefined;\n /** @internal */\n _inFlightCloseRequest: CloseRequest | undefined;\n /** @internal */\n _pendingAbortRequest: PendingAbortRequest | undefined;\n /** @internal */\n _backpressure!: boolean;\n\n constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSink: UnderlyingSink | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n } else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n\n InitializeWritableStream(this);\n\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked(): boolean {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsWritableStreamLocked(this);\n }\n\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('abort'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n\n return WritableStreamAbort(this, reason);\n }\n\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('close'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamClose(this);\n }\n\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter(): WritableStreamDefaultWriter {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('getWriter');\n }\n\n return AcquireWritableStreamDefaultWriter(this);\n }\n}\n\nObject.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(WritableStream.prototype.abort, 'abort');\nsetFunctionName(WritableStream.prototype.close, 'close');\nsetFunctionName(WritableStream.prototype.getWriter, 'getWriter');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n}\n\nexport {\n AcquireWritableStreamDefaultWriter,\n CreateWritableStream,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamDefaultControllerErrorIfNeeded,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite,\n WritableStreamCloseQueuedOrInFlight\n};\n\nexport type {\n UnderlyingSink,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkAbortCallback\n};\n\n// Abstract operations for the WritableStream.\n\nfunction AcquireWritableStreamDefaultWriter(stream: WritableStream): WritableStreamDefaultWriter {\n return new WritableStreamDefaultWriter(stream);\n}\n\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: WritableStream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n\n const controller: WritableStreamDefaultController = Object.create(WritableStreamDefaultController.prototype);\n\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm,\n abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n}\n\nfunction InitializeWritableStream(stream: WritableStream) {\n stream._state = 'writable';\n\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n\n stream._writer = undefined;\n\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined!;\n\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n}\n\nfunction IsWritableStream(x: unknown): x is WritableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n\n return x instanceof WritableStream;\n}\n\nfunction IsWritableStreamLocked(stream: WritableStream): boolean {\n assert(IsWritableStream(stream));\n\n if (stream._writer === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamAbort(stream: WritableStream, reason: any): Promise {\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n stream._writableStreamController._abortController?.abort(reason);\n\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state as WritableStreamState;\n\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined!,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest!._promise = promise;\n\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n\n return promise;\n}\n\nfunction WritableStreamClose(stream: WritableStream): Promise {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(\n `The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n\n assert(state === 'writable' || state === 'erroring');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const promise = newPromise((resolve, reject) => {\n const closeRequest: CloseRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._closeRequest = closeRequest;\n });\n\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n\n return promise;\n}\n\n// WritableStream API exposed for controllers.\n\nfunction WritableStreamAddWriteRequest(stream: WritableStream): Promise {\n assert(IsWritableStreamLocked(stream));\n assert(stream._state === 'writable');\n\n const promise = newPromise((resolve, reject) => {\n const writeRequest: WriteRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._writeRequests.push(writeRequest);\n });\n\n return promise;\n}\n\nfunction WritableStreamDealWithRejection(stream: WritableStream, error: any) {\n const state = stream._state;\n\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n\n assert(state === 'erroring');\n WritableStreamFinishErroring(stream);\n}\n\nfunction WritableStreamStartErroring(stream: WritableStream, reason: any) {\n assert(stream._storedError === undefined);\n assert(stream._state === 'writable');\n\n const controller = stream._writableStreamController;\n assert(controller !== undefined);\n\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n}\n\nfunction WritableStreamFinishErroring(stream: WritableStream) {\n assert(stream._state === 'erroring');\n assert(!WritableStreamHasOperationMarkedInFlight(stream));\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(\n promise,\n () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n },\n (reason: any) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n}\n\nfunction WritableStreamFinishInFlightWrite(stream: WritableStream) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n}\n\nfunction WritableStreamFinishInFlightWriteWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._reject(error);\n stream._inFlightWriteRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n WritableStreamDealWithRejection(stream, error);\n}\n\nfunction WritableStreamFinishInFlightClose(stream: WritableStream) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n\n const state = stream._state;\n\n assert(state === 'writable' || state === 'erroring');\n\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n\n stream._state = 'closed';\n\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n\n assert(stream._pendingAbortRequest === undefined);\n assert(stream._storedError === undefined);\n}\n\nfunction WritableStreamFinishInFlightCloseWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._reject(error);\n stream._inFlightCloseRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n}\n\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream: WritableStream): boolean {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamHasOperationMarkedInFlight(stream: WritableStream): boolean {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamMarkCloseRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightCloseRequest === undefined);\n assert(stream._closeRequest !== undefined);\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n}\n\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightWriteRequest === undefined);\n assert(stream._writeRequests.length !== 0);\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\n\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream: WritableStream) {\n assert(stream._state === 'errored');\n if (stream._closeRequest !== undefined) {\n assert(stream._inFlightCloseRequest === undefined);\n\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n}\n\nfunction WritableStreamUpdateBackpressure(stream: WritableStream, backpressure: boolean) {\n assert(stream._state === 'writable');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n } else {\n assert(!backpressure);\n\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n\n stream._backpressure = backpressure;\n}\n\n/**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\nexport class WritableStreamDefaultWriter {\n /** @internal */\n _ownerWritableStream: WritableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _closedPromiseState!: 'pending' | 'resolved' | 'rejected';\n /** @internal */\n _readyPromise!: Promise;\n /** @internal */\n _readyPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _readyPromise_reject?: (reason: any) => void;\n /** @internal */\n _readyPromiseState!: 'pending' | 'fulfilled' | 'rejected';\n\n constructor(stream: WritableStream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n\n this._ownerWritableStream = stream;\n stream._writer = this;\n\n const state = stream._state;\n\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n } else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n } else {\n assert(state === 'errored');\n\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize(): number | null {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n\n return this._readyPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamDefaultWriterClose(this);\n }\n\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock(): void {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return;\n }\n\n assert(stream._writer !== undefined);\n\n WritableStreamDefaultWriterRelease(this);\n }\n\n /**\n * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully,\n * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return\n * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes\n * errored before the writing process is initiated.\n *\n * Note that what \"success\" means is up to the underlying sink; it might indicate simply that the chunk has been\n * accepted, and not necessarily that it is safely saved to its ultimate destination.\n */\n write(chunk: W): Promise;\n write(chunk: W = undefined!): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n});\nsetFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\nsetFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\nsetFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\nsetFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n}\n\n// Abstract operations for the WritableStreamDefaultWriter.\n\nfunction IsWritableStreamDefaultWriter(x: any): x is WritableStreamDefaultWriter {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultWriter;\n}\n\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultWriterAbort(writer: WritableStreamDefaultWriter, reason: any) {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamAbort(stream, reason);\n}\n\nfunction WritableStreamDefaultWriterClose(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamClose(stream);\n}\n\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n return WritableStreamDefaultWriterClose(writer);\n}\n\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n } else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n } else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterGetDesiredSize(writer: WritableStreamDefaultWriter): number | null {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n\n if (state === 'closed') {\n return 0;\n }\n\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\n\nfunction WritableStreamDefaultWriterRelease(writer: WritableStreamDefaultWriter) {\n const stream = writer._ownerWritableStream;\n assert(stream !== undefined);\n assert(stream._writer === writer);\n\n const releasedError = new TypeError(\n `Writer was released and can no longer be used to monitor the stream's closedness`);\n\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n\n stream._writer = undefined;\n writer._ownerWritableStream = undefined!;\n}\n\nfunction WritableStreamDefaultWriterWrite(writer: WritableStreamDefaultWriter, chunk: W): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const controller = stream._writableStreamController;\n\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable');\n\n const promise = WritableStreamAddWriteRequest(stream);\n\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n\n return promise;\n}\n\nconst closeSentinel: unique symbol = {} as any;\n\ntype QueueRecord = W | typeof closeSentinel;\n\n/**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\nexport class WritableStreamDefaultController {\n /** @internal */\n _controlledWritableStream!: WritableStream;\n /** @internal */\n _queue!: SimpleQueue>>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _abortReason: any;\n /** @internal */\n _abortController: AbortController | undefined;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _writeAlgorithm!: (chunk: W) => Promise;\n /** @internal */\n _closeAlgorithm!: () => Promise;\n /** @internal */\n _abortAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason(): any {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('abortReason');\n }\n return this._abortReason;\n }\n\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal(): AbortSignal {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e: any = undefined): void {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n\n WritableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [AbortSteps](reason: any): Promise {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations implementing interface required by the WritableStream.\n\nfunction IsWritableStreamDefaultController(x: any): x is WritableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultController;\n}\n\nfunction SetUpWritableStreamDefaultController(stream: WritableStream,\n controller: WritableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(IsWritableStream(stream));\n assert(stream._writableStreamController === undefined);\n\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(\n startPromise,\n () => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n r => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n }\n );\n}\n\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream: WritableStream,\n underlyingSink: ValidatedUnderlyingSink,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let writeAlgorithm: (chunk: W) => Promise;\n let closeAlgorithm: () => Promise;\n let abortAlgorithm: (reason: any) => Promise;\n\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write!(chunk, controller);\n } else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close!();\n } else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort!(reason);\n } else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpWritableStreamDefaultController(\n stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\nfunction WritableStreamDefaultControllerClearAlgorithms(controller: WritableStreamDefaultController) {\n controller._writeAlgorithm = undefined!;\n controller._closeAlgorithm = undefined!;\n controller._abortAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\nfunction WritableStreamDefaultControllerClose(controller: WritableStreamDefaultController) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\nfunction WritableStreamDefaultControllerGetChunkSize(controller: WritableStreamDefaultController,\n chunk: W): number {\n try {\n return controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n}\n\nfunction WritableStreamDefaultControllerGetDesiredSize(controller: WritableStreamDefaultController): number {\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nfunction WritableStreamDefaultControllerWrite(controller: WritableStreamDefaultController,\n chunk: W,\n chunkSize: number) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\n// Abstract operations for the WritableStreamDefaultController.\n\nfunction WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n if (!controller._started) {\n return;\n }\n\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n\n const state = stream._state;\n assert(state !== 'closed' && state !== 'errored');\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n\n if (controller._queue.length === 0) {\n return;\n }\n\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n } else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n}\n\nfunction WritableStreamDefaultControllerErrorIfNeeded(controller: WritableStreamDefaultController, error: any) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n}\n\nfunction WritableStreamDefaultControllerProcessClose(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkCloseRequestInFlight(stream);\n\n DequeueValue(controller);\n assert(controller._queue.length === 0);\n\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(\n sinkClosePromise,\n () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n },\n reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerProcessWrite(controller: WritableStreamDefaultController, chunk: W) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(\n sinkWritePromise,\n () => {\n WritableStreamFinishInFlightWrite(stream);\n\n const state = stream._state;\n assert(state === 'writable' || state === 'erroring');\n\n DequeueValue(controller);\n\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerGetBackpressure(controller: WritableStreamDefaultController): boolean {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n}\n\n// A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultControllerError(controller: WritableStreamDefaultController, error: any) {\n const stream = controller._controlledWritableStream;\n\n assert(stream._state === 'writable');\n\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n}\n\n// Helper functions for the WritableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n}\n\n// Helper functions for the WritableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n}\n\n\n// Helper functions for the WritableStreamDefaultWriter.\n\nfunction defaultWriterBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n}\n\nfunction defaultWriterLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n}\n\nfunction defaultWriterClosedPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n}\n\nfunction defaultWriterClosedPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n}\n\nfunction defaultWriterClosedPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n}\n\nfunction defaultWriterClosedPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._closedPromise_resolve === undefined);\n assert(writer._closedPromise_reject === undefined);\n assert(writer._closedPromiseState !== 'pending');\n\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n}\n\nfunction defaultWriterReadyPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n}\n\nfunction defaultWriterReadyPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n}\n\nfunction defaultWriterReadyPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n}\n\nfunction defaultWriterReadyPromiseReset(writer: WritableStreamDefaultWriter) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitialize(writer);\n}\n\nfunction defaultWriterReadyPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n}\n","/// \n\nfunction getGlobals(): typeof globalThis | undefined {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n } else if (typeof self !== 'undefined') {\n return self;\n } else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n}\n\nexport const globals = getGlobals();\n","/// \nimport { globals } from '../globals';\nimport { setFunctionName } from '../lib/helpers/miscellaneous';\n\ninterface DOMException extends Error {\n name: string;\n message: string;\n}\n\ntype DOMExceptionConstructor = new (message?: string, name?: string) => DOMException;\n\nfunction isDOMExceptionConstructor(ctor: unknown): ctor is DOMExceptionConstructor {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if ((ctor as DOMExceptionConstructor).name !== 'DOMException') {\n return false;\n }\n try {\n new (ctor as DOMExceptionConstructor)();\n return true;\n } catch {\n return false;\n }\n}\n\n/**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\nfunction getFromGlobal(): DOMExceptionConstructor | undefined {\n const ctor = globals?.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n}\n\n/**\n * Support:\n * - All platforms\n */\nfunction createPolyfill(): DOMExceptionConstructor {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(this: DOMException, message?: string, name?: string) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n } as any;\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-redeclare\nconst DOMException: DOMExceptionConstructor = getFromGlobal() || createPolyfill();\n\nexport { DOMException };\n","import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';\nimport { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireWritableStreamDefaultWriter,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamCloseQueuedOrInFlight,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite\n} from '../writable-stream';\nimport assert from '../../stub/assert';\nimport {\n newPromise,\n PerformPromiseThen,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponFulfillment,\n uponPromise,\n uponRejection\n} from '../helpers/webidl';\nimport { noop } from '../../utils';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\nimport { DOMException } from '../../stub/dom-exception';\n\nexport function ReadableStreamPipeTo(source: ReadableStream,\n dest: WritableStream,\n preventClose: boolean,\n preventAbort: boolean,\n preventCancel: boolean,\n signal: AbortSignal | undefined): Promise {\n assert(IsReadableStream(source));\n assert(IsWritableStream(dest));\n assert(typeof preventClose === 'boolean');\n assert(typeof preventAbort === 'boolean');\n assert(typeof preventCancel === 'boolean');\n assert(signal === undefined || isAbortSignal(signal));\n assert(!IsReadableStreamLocked(source));\n assert(!IsWritableStreamLocked(dest));\n\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n\n source._disturbed = true;\n\n let shuttingDown = false;\n\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n\n return newPromise((resolve, reject) => {\n let abortAlgorithm: () => void;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions: Array<() => Promise> = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n\n signal.addEventListener('abort', abortAlgorithm);\n }\n\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done: boolean) {\n if (done) {\n resolveLoop();\n } else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n\n next(false);\n });\n }\n\n function pipeStep(): Promise {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(\n reader,\n {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n }\n );\n });\n });\n }\n\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n } else {\n shutdown();\n }\n return null;\n });\n\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n } else {\n shutdown(true, destClosed);\n }\n }\n\n setPromiseIsHandledToTrue(pipeLoop());\n\n function waitForWritesToFinish(): Promise {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(\n currentWrite,\n () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined\n );\n }\n\n function isOrBecomesErrored(stream: ReadableStream | WritableStream,\n promise: Promise,\n action: (reason: any) => null) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n } else {\n uponRejection(promise, action);\n }\n }\n\n function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise, action: () => null) {\n if (stream._state === 'closed') {\n action();\n } else {\n uponFulfillment(promise, action);\n }\n }\n\n function shutdownWithAction(action: () => Promise, originalIsError?: boolean, originalError?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n } else {\n doTheRest();\n }\n\n function doTheRest(): null {\n uponPromise(\n action(),\n () => finalize(originalIsError, originalError),\n newError => finalize(true, newError)\n );\n return null;\n }\n }\n\n function shutdown(isError?: boolean, error?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n } else {\n finalize(isError, error);\n }\n }\n\n function finalize(isError?: boolean, error?: any): null {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n } else {\n resolve(undefined);\n }\n\n return null;\n }\n });\n}\n","import type { QueuingStrategySizeCallback } from '../queuing-strategy';\nimport assert from '../../stub/assert';\nimport { DequeueValue, EnqueueValueWithSize, type QueuePair, ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n type ReadRequest\n} from './default-reader';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsReadableStreamLocked, ReadableStream, ReadableStreamClose, ReadableStreamError } from '../readable-stream';\nimport type { ValidatedUnderlyingSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\n\n/**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableStreamDefaultController {\n /** @internal */\n _controlledReadableStream!: ReadableStream;\n /** @internal */\n _queue!: SimpleQueue>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('close');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n\n ReadableStreamDefaultControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the controlled readable stream.\n */\n enqueue(chunk: R): void;\n enqueue(chunk: R = undefined!): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n ReadableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest): void {\n const stream = this._controlledReadableStream;\n\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n } else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n\n readRequest._chunkSteps(chunk);\n } else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n // Do nothing.\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\nsetFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableStreamDefaultController.\n\nfunction IsReadableStreamDefaultController(x: any): x is ReadableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultController;\n}\n\nfunction ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController): void {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController): boolean {\n const stream = controller._controlledReadableStream;\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\n// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n\nexport function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n controller._closeRequested = true;\n\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n}\n\nexport function ReadableStreamDefaultControllerEnqueue(\n controller: ReadableStreamDefaultController,\n chunk: R\n): void {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n } else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController, e: any) {\n const stream = controller._controlledReadableStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ResetQueue(controller);\n\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableStreamDefaultControllerGetDesiredSize(\n controller: ReadableStreamDefaultController\n): number | null {\n const state = controller._controlledReadableStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\n// This is used in the implementation of TransformStream.\nexport function ReadableStreamDefaultControllerHasBackpressure(\n controller: ReadableStreamDefaultController\n): boolean {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n\n return true;\n}\n\nexport function ReadableStreamDefaultControllerCanCloseOrEnqueue(\n controller: ReadableStreamDefaultController\n): boolean {\n const state = controller._controlledReadableStream._state;\n\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n\n return false;\n}\n\nexport function SetUpReadableStreamDefaultController(stream: ReadableStream,\n controller: ReadableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(stream._readableStreamController === undefined);\n\n controller._controlledReadableStream = stream;\n\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n stream: ReadableStream,\n underlyingSource: ValidatedUnderlyingSource,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback\n) {\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// Helper functions for the ReadableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n}\n","import {\n CreateReadableByteStream,\n CreateReadableStream,\n type DefaultReadableStream,\n IsReadableStream,\n type ReadableByteStream,\n ReadableStream,\n ReadableStreamCancel,\n type ReadableStreamReader\n} from '../readable-stream';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadRequest\n} from './default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReaderRead,\n type ReadIntoRequest\n} from './byob-reader';\nimport assert from '../../stub/assert';\nimport { newPromise, promiseResolvedWith, queueMicrotask, uponRejection } from '../helpers/webidl';\nimport {\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError\n} from './default-controller';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamControllerClose,\n ReadableByteStreamControllerEnqueue,\n ReadableByteStreamControllerError,\n ReadableByteStreamControllerGetBYOBRequest,\n ReadableByteStreamControllerRespond,\n ReadableByteStreamControllerRespondWithNewView\n} from './byte-stream-controller';\nimport { CreateArrayFromList } from '../abstract-ops/ecmascript';\nimport { CloneAsUint8Array } from '../abstract-ops/miscellaneous';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function ReadableStreamTee(stream: ReadableStream,\n cloneForBranch2: boolean): [ReadableStream, ReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream as unknown as ReadableByteStream) as\n unknown as [ReadableStream, ReadableStream];\n }\n return ReadableStreamDefaultTee(stream, cloneForBranch2);\n}\n\nexport function ReadableStreamDefaultTee(\n stream: ReadableStream,\n cloneForBranch2: boolean\n): [DefaultReadableStream, DefaultReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n\n const reader = AcquireReadableStreamDefaultReader(stream);\n\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: DefaultReadableStream;\n let branch2: DefaultReadableStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function pullAlgorithm(): Promise {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm() {\n // do nothing\n }\n\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n\n uponRejection(reader._closedPromise, (r: any) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n\n return [branch1, branch2];\n}\n\nexport function ReadableByteStreamTee(stream: ReadableByteStream): [ReadableByteStream, ReadableByteStream] {\n assert(IsReadableStream(stream));\n assert(IsReadableByteStreamController(stream._readableStreamController));\n\n let reader: ReadableStreamReader> = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: ReadableByteStream;\n let branch2: ReadableByteStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function forwardReaderError(thisReader: ReadableStreamReader>) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n assert(reader._readIntoRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n\n const readRequest: ReadRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n\n function pullWithBYOBReader(view: NonShared, forBranch2: boolean) {\n if (IsReadableStreamDefaultReader>(reader)) {\n assert(reader._readRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n\n const readIntoRequest: ReadIntoRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n } else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n\n if (chunk !== undefined) {\n assert(chunk.byteLength === 0);\n\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n\n function pull1Algorithm(): Promise {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, false);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function pull2Algorithm(): Promise {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, true);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm(): void {\n return;\n }\n\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n\n forwardReaderError(reader);\n\n return [branch1, branch2];\n}\n","import { CreateReadableStream, type DefaultReadableStream } from '../readable-stream';\nimport {\n isReadableStreamLike,\n type ReadableStreamDefaultReaderLike,\n type ReadableStreamLike\n} from './readable-stream-like';\nimport { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue } from './default-controller';\nimport { GetIterator, GetMethod, IteratorComplete, IteratorNext, IteratorValue } from '../abstract-ops/ecmascript';\nimport { promiseRejectedWith, promiseResolvedWith, reflectCall, transformPromiseWith } from '../helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport { noop } from '../../utils';\n\nexport function ReadableStreamFrom(\n source: Iterable | AsyncIterable | ReadableStreamLike\n): DefaultReadableStream {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n}\n\nexport function ReadableStreamFromIterable(asyncIterable: Iterable | AsyncIterable): DefaultReadableStream {\n let stream: DefaultReadableStream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n const iterator = iteratorRecord.iterator;\n let returnMethod: (typeof iterator)['return'] | undefined;\n try {\n returnMethod = GetMethod(iterator, 'return');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult: IteratorResult | Promise>;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n\nexport function ReadableStreamFromDefaultReader(\n reader: ReadableStreamDefaultReaderLike\n): DefaultReadableStream {\n let stream: DefaultReadableStream;\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let readPromise;\n try {\n readPromise = reader.read();\n } catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n } catch (e) {\n return promiseRejectedWith(e);\n }\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n","import { typeIsObject } from '../helpers/miscellaneous';\nimport type { ReadableStreamDefaultReadResult } from './default-reader';\n\n/**\n * A common interface for a `ReadadableStream` implementation.\n *\n * @public\n */\nexport interface ReadableStreamLike {\n readonly locked: boolean;\n\n getReader(): ReadableStreamDefaultReaderLike;\n}\n\n/**\n * A common interface for a `ReadableStreamDefaultReader` implementation.\n *\n * @public\n */\nexport interface ReadableStreamDefaultReaderLike {\n readonly closed: Promise;\n\n cancel(reason?: any): Promise;\n\n read(): Promise>;\n\n releaseLock(): void;\n}\n\nexport function isReadableStreamLike(stream: unknown): stream is ReadableStreamLike {\n return typeIsObject(stream) && typeof (stream as ReadableStreamLike).getReader !== 'undefined';\n}\n","import { assertDictionary, assertFunction, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamController,\n UnderlyingByteSource,\n UnderlyingDefaultOrByteSource,\n UnderlyingDefaultOrByteSourcePullCallback,\n UnderlyingDefaultOrByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n ValidatedUnderlyingDefaultOrByteSource\n} from '../readable-stream/underlying-source';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\n\nexport function convertUnderlyingDefaultOrByteSource(\n source: UnderlyingSource | UnderlyingByteSource | null,\n context: string\n): ValidatedUnderlyingDefaultOrByteSource {\n assertDictionary(source, context);\n const original = source as (UnderlyingDefaultOrByteSource | null);\n const autoAllocateChunkSize = original?.autoAllocateChunkSize;\n const cancel = original?.cancel;\n const pull = original?.pull;\n const start = original?.start;\n const type = original?.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(\n autoAllocateChunkSize,\n `${context} has member 'autoAllocateChunkSize' that`\n ),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original!, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original!, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n}\n\nfunction convertUnderlyingSourceCancelCallback(\n fn: UnderlyingSourceCancelCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSourcePullCallback(\n fn: UnderlyingDefaultOrByteSourcePullCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (controller: ReadableStreamController) => Promise {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSourceStartCallback(\n fn: UnderlyingDefaultOrByteSourceStartCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): UnderlyingDefaultOrByteSourceStartCallback {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertReadableStreamType(type: string, context: string): 'bytes' {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n}\n","import { assertDictionary } from './basic';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from '../readable-stream/pipe-options';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\n\nexport function convertPipeOptions(options: StreamPipeOptions | null | undefined,\n context: string): ValidatedStreamPipeOptions {\n assertDictionary(options, context);\n const preventAbort = options?.preventAbort;\n const preventCancel = options?.preventCancel;\n const preventClose = options?.preventClose;\n const signal = options?.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n}\n\nfunction assertAbortSignal(signal: unknown, context: string): asserts signal is AbortSignal {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n}\n","import assert from '../stub/assert';\nimport {\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith\n} from './helpers/webidl';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { AcquireReadableStreamAsyncIterator, type ReadableStreamAsyncIterator } from './readable-stream/async-iterator';\nimport { defaultReaderClosedPromiseReject, defaultReaderClosedPromiseResolve } from './readable-stream/generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderErrorReadRequests,\n type ReadableStreamDefaultReadResult\n} from './readable-stream/default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBReaderErrorReadIntoRequests,\n type ReadableStreamBYOBReadResult\n} from './readable-stream/byob-reader';\nimport { ReadableStreamPipeTo } from './readable-stream/pipe';\nimport { ReadableStreamTee } from './readable-stream/tee';\nimport { ReadableStreamFrom } from './readable-stream/from';\nimport { IsWritableStream, IsWritableStreamLocked, WritableStream } from './writable-stream';\nimport { SimpleQueue } from './simple-queue';\nimport {\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n SetUpReadableByteStreamController,\n SetUpReadableByteStreamControllerFromUnderlyingSource\n} from './readable-stream/byte-stream-controller';\nimport {\n ReadableStreamDefaultController,\n SetUpReadableStreamDefaultController,\n SetUpReadableStreamDefaultControllerFromUnderlyingSource\n} from './readable-stream/default-controller';\nimport type {\n UnderlyingByteSource,\n UnderlyingByteSourcePullCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceStartCallback\n} from './readable-stream/underlying-source';\nimport { noop } from '../utils';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { CreateArrayFromList, SymbolAsyncIterator } from './abstract-ops/ecmascript';\nimport { CancelSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertUnderlyingDefaultOrByteSource } from './validators/underlying-source';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions\n} from './readable-stream/reader-options';\nimport { convertReaderOptions } from './validators/reader-options';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from './readable-stream/pipe-options';\nimport type { ReadableStreamIteratorOptions } from './readable-stream/iterator-options';\nimport { convertIteratorOptions } from './validators/iterator-options';\nimport { convertPipeOptions } from './validators/pipe-options';\nimport type { ReadableWritablePair } from './readable-stream/readable-writable-pair';\nimport { convertReadableWritablePair } from './validators/readable-writable-pair';\nimport type { ReadableStreamDefaultReaderLike, ReadableStreamLike } from './readable-stream/readable-stream-like';\nimport type { NonShared } from './helpers/array-buffer-view';\n\nexport type DefaultReadableStream = ReadableStream & {\n _readableStreamController: ReadableStreamDefaultController\n};\n\nexport type ReadableByteStream = ReadableStream> & {\n _readableStreamController: ReadableByteStreamController\n};\n\ntype ReadableStreamState = 'readable' | 'closed' | 'errored';\n\n/**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\nexport class ReadableStream implements AsyncIterable {\n /** @internal */\n _state!: ReadableStreamState;\n /** @internal */\n _reader: ReadableStreamReader | undefined;\n /** @internal */\n _storedError: any;\n /** @internal */\n _disturbed!: boolean;\n /** @internal */\n _readableStreamController!: ReadableStreamDefaultController | ReadableByteStreamController;\n\n constructor(underlyingSource: UnderlyingByteSource, strategy?: { highWaterMark?: number; size?: undefined });\n constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSource: UnderlyingSource | UnderlyingByteSource | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n } else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n\n InitializeReadableStream(this);\n\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(\n this as unknown as ReadableByteStream,\n underlyingSource,\n highWaterMark\n );\n } else {\n assert(underlyingSource.type === undefined);\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n this,\n underlyingSource,\n highWaterMark,\n sizeAlgorithm\n );\n }\n }\n\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked(): boolean {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsReadableStreamLocked(this);\n }\n\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('cancel'));\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n\n return ReadableStreamCancel(this, reason);\n }\n\n /**\n * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader.\n *\n * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams,\n * i.e. streams which were constructed specifically with the ability to handle \"bring your own buffer\" reading.\n * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its\n * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise\n * control over allocation.\n */\n getReader({ mode }: { mode: 'byob' }): ReadableStreamBYOBReader;\n /**\n * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader.\n * While the stream is locked, no other reader can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to consume a stream\n * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours\n * or cancel the stream, which would interfere with your abstraction.\n */\n getReader(): ReadableStreamDefaultReader;\n getReader(\n rawOptions: ReadableStreamGetReaderOptions | null | undefined = undefined\n ): ReadableStreamDefaultReader | ReadableStreamBYOBReader {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('getReader');\n }\n\n const options = convertReaderOptions(rawOptions, 'First parameter');\n\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n\n assert(options.mode === 'byob');\n return AcquireReadableStreamBYOBReader(this as unknown as ReadableByteStream);\n }\n\n /**\n * Provides a convenient, chainable way of piping this readable stream through a transform stream\n * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream\n * into the writable side of the supplied pair, and returns the readable side for further use.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeThrough(\n transform: { readable: RS; writable: WritableStream },\n options?: StreamPipeOptions\n ): RS;\n pipeThrough(\n rawTransform: { readable: RS; writable: WritableStream } | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}\n ): RS {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n\n const promise = ReadableStreamPipeTo(\n this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n\n setPromiseIsHandledToTrue(promise);\n\n return transform.readable;\n }\n\n /**\n * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under\n * various error conditions can be customized with a number of passed options. It returns a promise that fulfills\n * when the piping process completes successfully, or rejects if any errors were encountered.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise;\n pipeTo(destination: WritableStream | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('pipeTo'));\n }\n\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(\n new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)\n );\n }\n\n let options: ValidatedStreamPipeOptions;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')\n );\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')\n );\n }\n\n return ReadableStreamPipeTo(\n this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n }\n\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee(): [ReadableStream, ReadableStream] {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('tee');\n }\n\n const branches = ReadableStreamTee(this, false);\n return CreateArrayFromList(branches);\n }\n\n /**\n * Asynchronously iterates over the chunks in the stream's internal queue.\n *\n * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader.\n * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method\n * is called, e.g. by breaking out of the loop.\n *\n * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also\n * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing\n * `true` for the `preventCancel` option.\n */\n values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n values(rawOptions: ReadableStreamIteratorOptions | null | undefined = undefined): ReadableStreamAsyncIterator {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('values');\n }\n\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n\n /**\n * {@inheritDoc ReadableStream.values}\n */\n [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n\n [SymbolAsyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator {\n // Stub implementation, overridden below\n return this.values(options);\n }\n\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream {\n return ReadableStreamFrom(asyncIterable);\n }\n}\n\nObject.defineProperties(ReadableStream, {\n from: { enumerable: true }\n});\nObject.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(ReadableStream.from, 'from');\nsetFunctionName(ReadableStream.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStream.prototype.getReader, 'getReader');\nsetFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\nsetFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\nsetFunctionName(ReadableStream.prototype.tee, 'tee');\nsetFunctionName(ReadableStream.prototype.values, 'values');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n}\nObject.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n});\n\nexport type {\n ReadableStreamAsyncIterator,\n ReadableStreamDefaultReadResult,\n ReadableStreamBYOBReadResult,\n ReadableStreamBYOBReaderReadOptions,\n UnderlyingByteSource,\n UnderlyingSource,\n UnderlyingSourceStartCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceCancelCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingByteSourcePullCallback,\n StreamPipeOptions,\n ReadableWritablePair,\n ReadableStreamIteratorOptions,\n ReadableStreamLike,\n ReadableStreamDefaultReaderLike\n};\n\n// Abstract operations for the ReadableStream.\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1\n): DefaultReadableStream {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: DefaultReadableStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n\n return stream;\n}\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableByteStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise\n): ReadableByteStream {\n const stream: ReadableByteStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n\n return stream;\n}\n\nfunction InitializeReadableStream(stream: ReadableStream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n}\n\nexport function IsReadableStream(x: unknown): x is ReadableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStream;\n}\n\nexport function IsReadableStreamDisturbed(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n return stream._disturbed;\n}\n\nexport function IsReadableStreamLocked(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n if (stream._reader === undefined) {\n return false;\n }\n\n return true;\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamCancel(stream: ReadableStream, reason: any): Promise {\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n ReadableStreamClose(stream);\n\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n}\n\nexport function ReadableStreamClose(stream: ReadableStream): void {\n assert(stream._state === 'readable');\n\n stream._state = 'closed';\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseResolve(reader);\n\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n}\n\nexport function ReadableStreamError(stream: ReadableStream, e: any): void {\n assert(IsReadableStream(stream));\n assert(stream._state === 'readable');\n\n stream._state = 'errored';\n stream._storedError = e;\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseReject(reader, e);\n\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n } else {\n assert(IsReadableStreamBYOBReader(reader));\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n}\n\n// Readers\n\nexport type ReadableStreamReader = ReadableStreamDefaultReader | ReadableStreamBYOBReader;\n\nexport {\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader\n};\n\n// Controllers\n\nexport {\n ReadableStreamDefaultController,\n ReadableStreamBYOBRequest,\n ReadableByteStreamController\n};\n\n// Helper functions for the ReadableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n}\n","import { assertDictionary, assertRequiredField } from './basic';\nimport { ReadableStream } from '../readable-stream';\nimport { WritableStream } from '../writable-stream';\nimport { assertReadableStream } from './readable-stream';\nimport { assertWritableStream } from './writable-stream';\n\nexport function convertReadableWritablePair(\n pair: { readable: RS; writable: WS } | null | undefined,\n context: string\n): { readable: RS; writable: WS } {\n assertDictionary(pair, context);\n\n const readable = pair?.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n\n const writable = pair?.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n\n return { readable, writable };\n}\n","import { assertDictionary } from './basic';\nimport type {\n ReadableStreamIteratorOptions,\n ValidatedReadableStreamIteratorOptions\n} from '../readable-stream/iterator-options';\n\nexport function convertIteratorOptions(options: ReadableStreamIteratorOptions | null | undefined,\n context: string): ValidatedReadableStreamIteratorOptions {\n assertDictionary(options, context);\n const preventCancel = options?.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n}\n","import type { QueuingStrategyInit } from '../queuing-strategy';\nimport { assertDictionary, assertRequiredField, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategyInit(init: QueuingStrategyInit | null | undefined,\n context: string): QueuingStrategyInit {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst byteLengthSizeFunction = (chunk: ArrayBufferView): number => {\n return chunk.byteLength;\n};\nsetFunctionName(byteLengthSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\nexport default class ByteLengthQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _byteLengthQueuingStrategyHighWaterMark: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size(): (chunk: ArrayBufferView) => number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n}\n\nObject.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the ByteLengthQueuingStrategy.\n\nfunction byteLengthBrandCheckException(name: string): TypeError {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n}\n\nexport function IsByteLengthQueuingStrategy(x: any): x is ByteLengthQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof ByteLengthQueuingStrategy;\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst countSizeFunction = (): 1 => {\n return 1;\n};\nsetFunctionName(countSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\nexport default class CountQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _countQueuingStrategyHighWaterMark!: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size(): (chunk: any) => 1 {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n}\n\nObject.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the CountQueuingStrategy.\n\nfunction countBrandCheckException(name: string): TypeError {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n}\n\nexport function IsCountQueuingStrategy(x: any): x is CountQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof CountQueuingStrategy;\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from '../transform-stream/transformer';\nimport { TransformStreamDefaultController } from '../transform-stream';\n\nexport function convertTransformer(original: Transformer | null,\n context: string): ValidatedTransformer {\n assertDictionary(original, context);\n const cancel = original?.cancel;\n const flush = original?.flush;\n const readableType = original?.readableType;\n const start = original?.start;\n const transform = original?.transform;\n const writableType = original?.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original!, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original!, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original!, `${context} has member 'transform' that`),\n writableType\n };\n}\n\nfunction convertTransformerFlushCallback(\n fn: TransformerFlushCallback,\n original: Transformer,\n context: string\n): (controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertTransformerStartCallback(\n fn: TransformerStartCallback,\n original: Transformer,\n context: string\n): TransformerStartCallback {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertTransformerTransformCallback(\n fn: TransformerTransformCallback,\n original: Transformer,\n context: string\n): (chunk: I, controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: I, controller: TransformStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n\nfunction convertTransformerCancelCallback(\n fn: TransformerCancelCallback,\n original: Transformer,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith,\n uponPromise\n} from './helpers/webidl';\nimport { CreateReadableStream, type DefaultReadableStream, ReadableStream } from './readable-stream';\nimport {\n ReadableStreamDefaultControllerCanCloseOrEnqueue,\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError,\n ReadableStreamDefaultControllerGetDesiredSize,\n ReadableStreamDefaultControllerHasBackpressure\n} from './readable-stream/default-controller';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { CreateWritableStream, WritableStream, WritableStreamDefaultControllerErrorIfNeeded } from './writable-stream';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from './transform-stream/transformer';\nimport { convertTransformer } from './validators/transformer';\n\n// Class TransformStream\n\n/**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\nexport class TransformStream {\n /** @internal */\n _writable!: WritableStream;\n /** @internal */\n _readable!: DefaultReadableStream;\n /** @internal */\n _backpressure!: boolean;\n /** @internal */\n _backpressureChangePromise!: Promise;\n /** @internal */\n _backpressureChangePromise_resolve!: () => void;\n /** @internal */\n _transformStreamController!: TransformStreamDefaultController;\n\n constructor(\n transformer?: Transformer,\n writableStrategy?: QueuingStrategy,\n readableStrategy?: QueuingStrategy\n );\n constructor(rawTransformer: Transformer | null | undefined = {},\n rawWritableStrategy: QueuingStrategy | null | undefined = {},\n rawReadableStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(\n this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm\n );\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n } else {\n startPromise_resolve(undefined);\n }\n }\n\n /**\n * The readable side of the transform stream.\n */\n get readable(): ReadableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n\n return this._readable;\n }\n\n /**\n * The writable side of the transform stream.\n */\n get writable(): WritableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n\n return this._writable;\n }\n}\n\nObject.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n}\n\nexport type {\n Transformer,\n TransformerCancelCallback,\n TransformerStartCallback,\n TransformerFlushCallback,\n TransformerTransformCallback\n};\n\n// Transform Stream Abstract Operations\n\nexport function CreateTransformStream(startAlgorithm: () => void | PromiseLike,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n writableHighWaterMark = 1,\n writableSizeAlgorithm: QueuingStrategySizeCallback = () => 1,\n readableHighWaterMark = 0,\n readableSizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(writableHighWaterMark));\n assert(IsNonNegativeNumber(readableHighWaterMark));\n\n const stream: TransformStream = Object.create(TransformStream.prototype);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n\n const startResult = startAlgorithm();\n startPromise_resolve(startResult);\n return stream;\n}\n\nfunction InitializeTransformStream(stream: TransformStream,\n startPromise: Promise,\n writableHighWaterMark: number,\n writableSizeAlgorithm: QueuingStrategySizeCallback,\n readableHighWaterMark: number,\n readableSizeAlgorithm: QueuingStrategySizeCallback) {\n function startAlgorithm(): Promise {\n return startPromise;\n }\n\n function writeAlgorithm(chunk: I): Promise {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n\n function abortAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n\n function closeAlgorithm(): Promise {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm,\n writableHighWaterMark, writableSizeAlgorithm);\n\n function pullAlgorithm(): Promise {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n\n function cancelAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined!;\n stream._backpressureChangePromise = undefined!;\n stream._backpressureChangePromise_resolve = undefined!;\n TransformStreamSetBackpressure(stream, true);\n\n stream._transformStreamController = undefined!;\n}\n\nfunction IsTransformStream(x: unknown): x is TransformStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n\n return x instanceof TransformStream;\n}\n\n// This is a no-op if both sides are already errored.\nfunction TransformStreamError(stream: TransformStream, e: any) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n}\n\nfunction TransformStreamErrorWritableAndUnblockWrite(stream: TransformStream, e: any) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n}\n\nfunction TransformStreamUnblockWrite(stream: TransformStream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure()\n // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time\n // _backpressure is set.\n TransformStreamSetBackpressure(stream, false);\n }\n}\n\nfunction TransformStreamSetBackpressure(stream: TransformStream, backpressure: boolean) {\n // Passes also when called during construction.\n assert(stream._backpressure !== backpressure);\n\n if (stream._backpressureChangePromise !== undefined) {\n stream._backpressureChangePromise_resolve();\n }\n\n stream._backpressureChangePromise = newPromise(resolve => {\n stream._backpressureChangePromise_resolve = resolve;\n });\n\n stream._backpressure = backpressure;\n}\n\n// Class TransformStreamDefaultController\n\n/**\n * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}.\n *\n * @public\n */\nexport class TransformStreamDefaultController {\n /** @internal */\n _controlledTransformStream: TransformStream;\n /** @internal */\n _finishPromise: Promise | undefined;\n /** @internal */\n _finishPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _finishPromise_reject?: (reason: any) => void;\n /** @internal */\n _transformAlgorithm: (chunk: any) => Promise;\n /** @internal */\n _flushAlgorithm: () => Promise;\n /** @internal */\n _cancelAlgorithm: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full.\n */\n get desiredSize(): number | null {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n const readableController = this._controlledTransformStream._readable._readableStreamController;\n return ReadableStreamDefaultControllerGetDesiredSize(readableController);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the readable side of the controlled transform stream.\n */\n enqueue(chunk: O): void;\n enqueue(chunk: O = undefined!): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n TransformStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors both the readable side and the writable side of the controlled transform stream, making all future\n * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.\n */\n error(reason: any = undefined): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n TransformStreamDefaultControllerError(this, reason);\n }\n\n /**\n * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate(): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n\n TransformStreamDefaultControllerTerminate(this);\n }\n}\n\nObject.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(TransformStreamDefaultController.prototype.error, 'error');\nsetFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n}\n\n// Transform Stream Default Controller Abstract Operations\n\nfunction IsTransformStreamDefaultController(x: any): x is TransformStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n\n return x instanceof TransformStreamDefaultController;\n}\n\nfunction SetUpTransformStreamDefaultController(stream: TransformStream,\n controller: TransformStreamDefaultController,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise) {\n assert(IsTransformStream(stream));\n assert(stream._transformStreamController === undefined);\n\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nfunction SetUpTransformStreamDefaultControllerFromTransformer(stream: TransformStream,\n transformer: ValidatedTransformer) {\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n let transformAlgorithm: (chunk: I) => Promise;\n let flushAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform!(chunk, controller);\n } else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk as unknown as O);\n return promiseResolvedWith(undefined);\n } catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush!(controller);\n } else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n}\n\nfunction TransformStreamDefaultControllerClearAlgorithms(controller: TransformStreamDefaultController) {\n controller._transformAlgorithm = undefined!;\n controller._flushAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\nfunction TransformStreamDefaultControllerEnqueue(controller: TransformStreamDefaultController, chunk: O) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n\n // We throttle transform invocations based on the backpressure of the ReadableStream, but we still\n // accept TransformStreamDefaultControllerEnqueue() calls.\n\n try {\n ReadableStreamDefaultControllerEnqueue(readableController, chunk);\n } catch (e) {\n // This happens when readableStrategy.size() throws.\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n\n throw stream._readable._storedError;\n }\n\n const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);\n if (backpressure !== stream._backpressure) {\n assert(backpressure);\n TransformStreamSetBackpressure(stream, true);\n }\n}\n\nfunction TransformStreamDefaultControllerError(controller: TransformStreamDefaultController, e: any) {\n TransformStreamError(controller._controlledTransformStream, e);\n}\n\nfunction TransformStreamDefaultControllerPerformTransform(controller: TransformStreamDefaultController,\n chunk: I) {\n const transformPromise = controller._transformAlgorithm(chunk);\n return transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n}\n\nfunction TransformStreamDefaultControllerTerminate(controller: TransformStreamDefaultController) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n\n ReadableStreamDefaultControllerClose(readableController);\n\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n}\n\n// TransformStreamDefaultSink Algorithms\n\nfunction TransformStreamDefaultSinkWriteAlgorithm(stream: TransformStream, chunk: I): Promise {\n assert(stream._writable._state === 'writable');\n\n const controller = stream._transformStreamController;\n\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n assert(backpressureChangePromise !== undefined);\n return transformPromiseWith(backpressureChangePromise, () => {\n const writable = stream._writable;\n const state = writable._state;\n if (state === 'erroring') {\n throw writable._storedError;\n }\n assert(state === 'writable');\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n });\n }\n\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n}\n\nfunction TransformStreamDefaultSinkAbortAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally,\n // we don't run the _cancelAlgorithm again.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerError(readable._readableStreamController, reason);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\nfunction TransformStreamDefaultSinkCloseAlgorithm(stream: TransformStream): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// TransformStreamDefaultSource Algorithms\n\nfunction TransformStreamDefaultSourcePullAlgorithm(stream: TransformStream): Promise {\n // Invariant. Enforced by the promises returned by start() and pull().\n assert(stream._backpressure);\n\n assert(stream._backpressureChangePromise !== undefined);\n\n TransformStreamSetBackpressure(stream, false);\n\n // Prevent the next pull() call until there is backpressure.\n return stream._backpressureChangePromise;\n}\n\nfunction TransformStreamDefaultSourceCancelAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._writable cannot change after construction, so caching it across a call to user code is safe.\n const writable = stream._writable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or\n // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the\n // _flushAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (writable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, writable._storedError);\n } else {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// Helper functions for the TransformStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n}\n\nexport function defaultControllerFinishPromiseResolve(controller: TransformStreamDefaultController) {\n if (controller._finishPromise_resolve === undefined) {\n return;\n }\n\n controller._finishPromise_resolve();\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nexport function defaultControllerFinishPromiseReject(controller: TransformStreamDefaultController, reason: any) {\n if (controller._finishPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(controller._finishPromise!);\n controller._finishPromise_reject(reason);\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\n// Helper functions for the TransformStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStream.prototype.${name} can only be used on a TransformStream`);\n}\n","import {\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n ReadableByteStreamController,\n ReadableStream,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultController,\n ReadableStreamDefaultReader,\n TransformStream,\n TransformStreamDefaultController,\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter\n} from './ponyfill';\nimport { globals } from './globals';\n\n// Export\nexport * from './ponyfill';\n\nconst exports = {\n ReadableStream,\n ReadableStreamDefaultController,\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader,\n\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter,\n\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n\n TransformStream,\n TransformStreamDefaultController\n};\n\n// Add classes to global scope\nif (typeof 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\ No newline at end of file diff --git a/node_modules/web-streams-polyfill/dist/polyfill.mjs b/node_modules/web-streams-polyfill/dist/polyfill.mjs new file mode 100644 index 00000000..f1dab863 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/polyfill.mjs @@ -0,0 +1,4991 @@ +/** + * @license + * web-streams-polyfill v3.3.3 + * Copyright 2024 Mattias Buelens, Diwank Singh Tomer and other contributors. + * This code is released under the MIT license. + * SPDX-License-Identifier: MIT + */ +/// +var SymbolPolyfill = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? + Symbol : + function (description) { return "Symbol(".concat(description, ")"); }; + +/****************************************************************************** +Copyright (c) Microsoft Corporation. + +Permission to use, copy, modify, and/or distribute this software for any +purpose with or without fee is hereby granted. + +THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH +REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY +AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, +INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM +LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR +OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR +PERFORMANCE OF THIS SOFTWARE. +***************************************************************************** */ +/* global Reflect, Promise, SuppressedError, Symbol */ + + +function __generator(thisArg, body) { + var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g; + return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g; + function verb(n) { return function (v) { return step([n, v]); }; } + function step(op) { + if (f) throw new TypeError("Generator is already executing."); + while (g && (g = 0, op[0] && (_ = 0)), _) try { + if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t; + if (y = 0, t) op = [op[0] & 2, t.value]; + switch (op[0]) { + case 0: case 1: t = op; break; + case 4: _.label++; return { value: op[1], done: false }; + case 5: _.label++; y = op[1]; op = [0]; continue; + case 7: op = _.ops.pop(); _.trys.pop(); continue; + default: + if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; } + if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; } + if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; } + if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; } + if (t[2]) _.ops.pop(); + _.trys.pop(); continue; + } + op = body.call(thisArg, _); + } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; } + if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true }; + } +} + +function __values(o) { + var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0; + if (m) return m.call(o); + if (o && typeof o.length === "number") return { + next: function () { + if (o && i >= o.length) o = void 0; + return { value: o && o[i++], done: !o }; + } + }; + throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined."); +} + +function __await(v) { + return this instanceof __await ? (this.v = v, this) : new __await(v); +} + +function __asyncGenerator(thisArg, _arguments, generator) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var g = generator.apply(thisArg, _arguments || []), i, q = []; + return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i; + function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; } + function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } } + function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); } + function fulfill(value) { resume("next", value); } + function reject(value) { resume("throw", value); } + function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); } +} + +function __asyncDelegator(o) { + var i, p; + return i = {}, verb("next"), verb("throw", function (e) { throw e; }), verb("return"), i[Symbol.iterator] = function () { return this; }, i; + function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; } +} + +function __asyncValues(o) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var m = o[Symbol.asyncIterator], i; + return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i); + function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; } + function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); } +} + +typeof SuppressedError === "function" ? SuppressedError : function (error, suppressed, message) { + var e = new Error(message); + return e.name = "SuppressedError", e.error = error, e.suppressed = suppressed, e; +}; + +function noop() { + return undefined; +} + +function typeIsObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; +} +var rethrowAssertionErrorRejection = noop; +function setFunctionName(fn, name) { + try { + Object.defineProperty(fn, 'name', { + value: name, + configurable: true + }); + } + catch (_a) { + // This property is non-configurable in older browsers, so ignore if this throws. + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility + } +} + +var originalPromise = Promise; +var originalPromiseThen = Promise.prototype.then; +var originalPromiseReject = Promise.reject.bind(originalPromise); +// https://webidl.spec.whatwg.org/#a-new-promise +function newPromise(executor) { + return new originalPromise(executor); +} +// https://webidl.spec.whatwg.org/#a-promise-resolved-with +function promiseResolvedWith(value) { + return newPromise(function (resolve) { return resolve(value); }); +} +// https://webidl.spec.whatwg.org/#a-promise-rejected-with +function promiseRejectedWith(reason) { + return originalPromiseReject(reason); +} +function PerformPromiseThen(promise, onFulfilled, onRejected) { + // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an + // approximation. + return originalPromiseThen.call(promise, onFulfilled, onRejected); +} +// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned +// from that handler. To prevent this, return null instead of void from all handlers. +// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it +function uponPromise(promise, onFulfilled, onRejected) { + PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection); +} +function uponFulfillment(promise, onFulfilled) { + uponPromise(promise, onFulfilled); +} +function uponRejection(promise, onRejected) { + uponPromise(promise, undefined, onRejected); +} +function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) { + return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler); +} +function setPromiseIsHandledToTrue(promise) { + PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection); +} +var _queueMicrotask = function (callback) { + if (typeof queueMicrotask === 'function') { + _queueMicrotask = queueMicrotask; + } + else { + var resolvedPromise_1 = promiseResolvedWith(undefined); + _queueMicrotask = function (cb) { return PerformPromiseThen(resolvedPromise_1, cb); }; + } + return _queueMicrotask(callback); +}; +function reflectCall(F, V, args) { + if (typeof F !== 'function') { + throw new TypeError('Argument is not a function'); + } + return Function.prototype.apply.call(F, V, args); +} +function promiseCall(F, V, args) { + try { + return promiseResolvedWith(reflectCall(F, V, args)); + } + catch (value) { + return promiseRejectedWith(value); + } +} + +// Original from Chromium +// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js +var QUEUE_MAX_ARRAY_SIZE = 16384; +/** + * Simple queue structure. + * + * Avoids scalability issues with using a packed array directly by using + * multiple arrays in a linked list and keeping the array size bounded. + */ +var SimpleQueue = /** @class */ (function () { + function SimpleQueue() { + this._cursor = 0; + this._size = 0; + // _front and _back are always defined. + this._front = { + _elements: [], + _next: undefined + }; + this._back = this._front; + // The cursor is used to avoid calling Array.shift(). + // It contains the index of the front element of the array inside the + // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE). + this._cursor = 0; + // When there is only one node, size === elements.length - cursor. + this._size = 0; + } + Object.defineProperty(SimpleQueue.prototype, "length", { + get: function () { + return this._size; + }, + enumerable: false, + configurable: true + }); + // For exception safety, this method is structured in order: + // 1. Read state + // 2. Calculate required state mutations + // 3. Perform state mutations + SimpleQueue.prototype.push = function (element) { + var oldBack = this._back; + var newBack = oldBack; + if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) { + newBack = { + _elements: [], + _next: undefined + }; + } + // push() is the mutation most likely to throw an exception, so it + // goes first. + oldBack._elements.push(element); + if (newBack !== oldBack) { + this._back = newBack; + oldBack._next = newBack; + } + ++this._size; + }; + // Like push(), shift() follows the read -> calculate -> mutate pattern for + // exception safety. + SimpleQueue.prototype.shift = function () { // must not be called on an empty queue + var oldFront = this._front; + var newFront = oldFront; + var oldCursor = this._cursor; + var newCursor = oldCursor + 1; + var elements = oldFront._elements; + var element = elements[oldCursor]; + if (newCursor === QUEUE_MAX_ARRAY_SIZE) { + newFront = oldFront._next; + newCursor = 0; + } + // No mutations before this point. + --this._size; + this._cursor = newCursor; + if (oldFront !== newFront) { + this._front = newFront; + } + // Permit shifted element to be garbage collected. + elements[oldCursor] = undefined; + return element; + }; + // The tricky thing about forEach() is that it can be called + // re-entrantly. The queue may be mutated inside the callback. It is easy to + // see that push() within the callback has no negative effects since the end + // of the queue is checked for on every iteration. If shift() is called + // repeatedly within the callback then the next iteration may return an + // element that has been removed. In this case the callback will be called + // with undefined values until we either "catch up" with elements that still + // exist or reach the back of the queue. + SimpleQueue.prototype.forEach = function (callback) { + var i = this._cursor; + var node = this._front; + var elements = node._elements; + while (i !== elements.length || node._next !== undefined) { + if (i === elements.length) { + node = node._next; + elements = node._elements; + i = 0; + if (elements.length === 0) { + break; + } + } + callback(elements[i]); + ++i; + } + }; + // Return the element that would be returned if shift() was called now, + // without modifying the queue. + SimpleQueue.prototype.peek = function () { // must not be called on an empty queue + var front = this._front; + var cursor = this._cursor; + return front._elements[cursor]; + }; + return SimpleQueue; +}()); + +var AbortSteps = SymbolPolyfill('[[AbortSteps]]'); +var ErrorSteps = SymbolPolyfill('[[ErrorSteps]]'); +var CancelSteps = SymbolPolyfill('[[CancelSteps]]'); +var PullSteps = SymbolPolyfill('[[PullSteps]]'); +var ReleaseSteps = SymbolPolyfill('[[ReleaseSteps]]'); + +function ReadableStreamReaderGenericInitialize(reader, stream) { + reader._ownerReadableStream = stream; + stream._reader = reader; + if (stream._state === 'readable') { + defaultReaderClosedPromiseInitialize(reader); + } + else if (stream._state === 'closed') { + defaultReaderClosedPromiseInitializeAsResolved(reader); + } + else { + defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError); + } +} +// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state +// check. +function ReadableStreamReaderGenericCancel(reader, reason) { + var stream = reader._ownerReadableStream; + return ReadableStreamCancel(stream, reason); +} +function ReadableStreamReaderGenericRelease(reader) { + var stream = reader._ownerReadableStream; + if (stream._state === 'readable') { + defaultReaderClosedPromiseReject(reader, new TypeError("Reader was released and can no longer be used to monitor the stream's closedness")); + } + else { + defaultReaderClosedPromiseResetToRejected(reader, new TypeError("Reader was released and can no longer be used to monitor the stream's closedness")); + } + stream._readableStreamController[ReleaseSteps](); + stream._reader = undefined; + reader._ownerReadableStream = undefined; +} +// Helper functions for the readers. +function readerLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released reader'); +} +// Helper functions for the ReadableStreamDefaultReader. +function defaultReaderClosedPromiseInitialize(reader) { + reader._closedPromise = newPromise(function (resolve, reject) { + reader._closedPromise_resolve = resolve; + reader._closedPromise_reject = reject; + }); +} +function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseReject(reader, reason); +} +function defaultReaderClosedPromiseInitializeAsResolved(reader) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseResolve(reader); +} +function defaultReaderClosedPromiseReject(reader, reason) { + if (reader._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(reader._closedPromise); + reader._closedPromise_reject(reason); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; +} +function defaultReaderClosedPromiseResetToRejected(reader, reason) { + defaultReaderClosedPromiseInitializeAsRejected(reader, reason); +} +function defaultReaderClosedPromiseResolve(reader) { + if (reader._closedPromise_resolve === undefined) { + return; + } + reader._closedPromise_resolve(undefined); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; +} + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill +var NumberIsFinite = Number.isFinite || function (x) { + return typeof x === 'number' && isFinite(x); +}; + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill +var MathTrunc = Math.trunc || function (v) { + return v < 0 ? Math.ceil(v) : Math.floor(v); +}; + +// https://heycam.github.io/webidl/#idl-dictionaries +function isDictionary(x) { + return typeof x === 'object' || typeof x === 'function'; +} +function assertDictionary(obj, context) { + if (obj !== undefined && !isDictionary(obj)) { + throw new TypeError("".concat(context, " is not an object.")); + } +} +// https://heycam.github.io/webidl/#idl-callback-functions +function assertFunction(x, context) { + if (typeof x !== 'function') { + throw new TypeError("".concat(context, " is not a function.")); + } +} +// https://heycam.github.io/webidl/#idl-object +function isObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; +} +function assertObject(x, context) { + if (!isObject(x)) { + throw new TypeError("".concat(context, " is not an object.")); + } +} +function assertRequiredArgument(x, position, context) { + if (x === undefined) { + throw new TypeError("Parameter ".concat(position, " is required in '").concat(context, "'.")); + } +} +function assertRequiredField(x, field, context) { + if (x === undefined) { + throw new TypeError("".concat(field, " is required in '").concat(context, "'.")); + } +} +// https://heycam.github.io/webidl/#idl-unrestricted-double +function convertUnrestrictedDouble(value) { + return Number(value); +} +function censorNegativeZero(x) { + return x === 0 ? 0 : x; +} +function integerPart(x) { + return censorNegativeZero(MathTrunc(x)); +} +// https://heycam.github.io/webidl/#idl-unsigned-long-long +function convertUnsignedLongLongWithEnforceRange(value, context) { + var lowerBound = 0; + var upperBound = Number.MAX_SAFE_INTEGER; + var x = Number(value); + x = censorNegativeZero(x); + if (!NumberIsFinite(x)) { + throw new TypeError("".concat(context, " is not a finite number")); + } + x = integerPart(x); + if (x < lowerBound || x > upperBound) { + throw new TypeError("".concat(context, " is outside the accepted range of ").concat(lowerBound, " to ").concat(upperBound, ", inclusive")); + } + if (!NumberIsFinite(x) || x === 0) { + return 0; + } + // TODO Use BigInt if supported? + // let xBigInt = BigInt(integerPart(x)); + // xBigInt = BigInt.asUintN(64, xBigInt); + // return Number(xBigInt); + return x; +} + +function assertReadableStream(x, context) { + if (!IsReadableStream(x)) { + throw new TypeError("".concat(context, " is not a ReadableStream.")); + } +} + +// Abstract operations for the ReadableStream. +function AcquireReadableStreamDefaultReader(stream) { + return new ReadableStreamDefaultReader(stream); +} +// ReadableStream API exposed for controllers. +function ReadableStreamAddReadRequest(stream, readRequest) { + stream._reader._readRequests.push(readRequest); +} +function ReadableStreamFulfillReadRequest(stream, chunk, done) { + var reader = stream._reader; + var readRequest = reader._readRequests.shift(); + if (done) { + readRequest._closeSteps(); + } + else { + readRequest._chunkSteps(chunk); + } +} +function ReadableStreamGetNumReadRequests(stream) { + return stream._reader._readRequests.length; +} +function ReadableStreamHasDefaultReader(stream) { + var reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamDefaultReader(reader)) { + return false; + } + return true; +} +/** + * A default reader vended by a {@link ReadableStream}. + * + * @public + */ +var ReadableStreamDefaultReader = /** @class */ (function () { + function ReadableStreamDefaultReader(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readRequests = new SimpleQueue(); + } + Object.defineProperty(ReadableStreamDefaultReader.prototype, "closed", { + /** + * Returns a promise that will be fulfilled when the stream becomes closed, + * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing. + */ + get: function () { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('closed')); + } + return this._closedPromise; + }, + enumerable: false, + configurable: true + }); + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + ReadableStreamDefaultReader.prototype.cancel = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + }; + /** + * Returns a promise that allows access to the next chunk from the stream's internal queue, if available. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + ReadableStreamDefaultReader.prototype.read = function () { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('read')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + var resolvePromise; + var rejectPromise; + var promise = newPromise(function (resolve, reject) { + resolvePromise = resolve; + rejectPromise = reject; + }); + var readRequest = { + _chunkSteps: function (chunk) { return resolvePromise({ value: chunk, done: false }); }, + _closeSteps: function () { return resolvePromise({ value: undefined, done: true }); }, + _errorSteps: function (e) { return rejectPromise(e); } + }; + ReadableStreamDefaultReaderRead(this, readRequest); + return promise; + }; + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + ReadableStreamDefaultReader.prototype.releaseLock = function () { + if (!IsReadableStreamDefaultReader(this)) { + throw defaultReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamDefaultReaderRelease(this); + }; + return ReadableStreamDefaultReader; +}()); +Object.defineProperties(ReadableStreamDefaultReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } +}); +setFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel'); +setFunctionName(ReadableStreamDefaultReader.prototype.read, 'read'); +setFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultReader.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamDefaultReader', + configurable: true + }); +} +// Abstract operations for the readers. +function IsReadableStreamDefaultReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) { + return false; + } + return x instanceof ReadableStreamDefaultReader; +} +function ReadableStreamDefaultReaderRead(reader, readRequest) { + var stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'closed') { + readRequest._closeSteps(); + } + else if (stream._state === 'errored') { + readRequest._errorSteps(stream._storedError); + } + else { + stream._readableStreamController[PullSteps](readRequest); + } +} +function ReadableStreamDefaultReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + var e = new TypeError('Reader was released'); + ReadableStreamDefaultReaderErrorReadRequests(reader, e); +} +function ReadableStreamDefaultReaderErrorReadRequests(reader, e) { + var readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(function (readRequest) { + readRequest._errorSteps(e); + }); +} +// Helper functions for the ReadableStreamDefaultReader. +function defaultReaderBrandCheckException(name) { + return new TypeError("ReadableStreamDefaultReader.prototype.".concat(name, " can only be used on a ReadableStreamDefaultReader")); +} + +var _a$1, _b, _c; +function CreateArrayFromList(elements) { + // We use arrays to represent lists, so this is basically a no-op. + // Do a slice though just in case we happen to depend on the unique-ness. + return elements.slice(); +} +function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) { + new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset); +} +var TransferArrayBuffer = function (O) { + if (typeof O.transfer === 'function') { + TransferArrayBuffer = function (buffer) { return buffer.transfer(); }; + } + else if (typeof structuredClone === 'function') { + TransferArrayBuffer = function (buffer) { return structuredClone(buffer, { transfer: [buffer] }); }; + } + else { + // Not implemented correctly + TransferArrayBuffer = function (buffer) { return buffer; }; + } + return TransferArrayBuffer(O); +}; +var IsDetachedBuffer = function (O) { + if (typeof O.detached === 'boolean') { + IsDetachedBuffer = function (buffer) { return buffer.detached; }; + } + else { + // Not implemented correctly + IsDetachedBuffer = function (buffer) { return buffer.byteLength === 0; }; + } + return IsDetachedBuffer(O); +}; +function ArrayBufferSlice(buffer, begin, end) { + // ArrayBuffer.prototype.slice is not available on IE10 + // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice + if (buffer.slice) { + return buffer.slice(begin, end); + } + var length = end - begin; + var slice = new ArrayBuffer(length); + CopyDataBlockBytes(slice, 0, buffer, begin, length); + return slice; +} +function GetMethod(receiver, prop) { + var func = receiver[prop]; + if (func === undefined || func === null) { + return undefined; + } + if (typeof func !== 'function') { + throw new TypeError("".concat(String(prop), " is not a function")); + } + return func; +} +function CreateAsyncFromSyncIterator(syncIteratorRecord) { + // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%, + // we use yield* inside an async generator function to achieve the same result. + var _a; + // Wrap the sync iterator inside a sync iterable, so we can use it with yield*. + var syncIterable = (_a = {}, + _a[SymbolPolyfill.iterator] = function () { return syncIteratorRecord.iterator; }, + _a); + // Create an async generator function and immediately invoke it. + var asyncIterator = (function () { + return __asyncGenerator(this, arguments, function () { + return __generator(this, function (_a) { + switch (_a.label) { + case 0: return [5 /*yield**/, __values(__asyncDelegator(__asyncValues(syncIterable)))]; + case 1: return [4 /*yield*/, __await.apply(void 0, [_a.sent()])]; + case 2: return [4 /*yield*/, __await.apply(void 0, [_a.sent()])]; + case 3: return [2 /*return*/, _a.sent()]; + } + }); + }); + }()); + // Return as an async iterator record. + var nextMethod = asyncIterator.next; + return { iterator: asyncIterator, nextMethod: nextMethod, done: false }; +} +// Aligns with core-js/modules/es.symbol.async-iterator.js +var SymbolAsyncIterator = (_c = (_a$1 = SymbolPolyfill.asyncIterator) !== null && _a$1 !== void 0 ? _a$1 : (_b = SymbolPolyfill.for) === null || _b === void 0 ? void 0 : _b.call(SymbolPolyfill, 'Symbol.asyncIterator')) !== null && _c !== void 0 ? _c : '@@asyncIterator'; +function GetIterator(obj, hint, method) { + if (hint === void 0) { hint = 'sync'; } + if (method === undefined) { + if (hint === 'async') { + method = GetMethod(obj, SymbolAsyncIterator); + if (method === undefined) { + var syncMethod = GetMethod(obj, SymbolPolyfill.iterator); + var syncIteratorRecord = GetIterator(obj, 'sync', syncMethod); + return CreateAsyncFromSyncIterator(syncIteratorRecord); + } + } + else { + method = GetMethod(obj, SymbolPolyfill.iterator); + } + } + if (method === undefined) { + throw new TypeError('The object is not iterable'); + } + var iterator = reflectCall(method, obj, []); + if (!typeIsObject(iterator)) { + throw new TypeError('The iterator method must return an object'); + } + var nextMethod = iterator.next; + return { iterator: iterator, nextMethod: nextMethod, done: false }; +} +function IteratorNext(iteratorRecord) { + var result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []); + if (!typeIsObject(result)) { + throw new TypeError('The iterator.next() method must return an object'); + } + return result; +} +function IteratorComplete(iterResult) { + return Boolean(iterResult.done); +} +function IteratorValue(iterResult) { + return iterResult.value; +} + +/// +var _a; +// We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it. +var AsyncIteratorPrototype = (_a = {}, + // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( ) + // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator + _a[SymbolAsyncIterator] = function () { + return this; + }, + _a); +Object.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false }); + +/// +var ReadableStreamAsyncIteratorImpl = /** @class */ (function () { + function ReadableStreamAsyncIteratorImpl(reader, preventCancel) { + this._ongoingPromise = undefined; + this._isFinished = false; + this._reader = reader; + this._preventCancel = preventCancel; + } + ReadableStreamAsyncIteratorImpl.prototype.next = function () { + var _this = this; + var nextSteps = function () { return _this._nextSteps(); }; + this._ongoingPromise = this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) : + nextSteps(); + return this._ongoingPromise; + }; + ReadableStreamAsyncIteratorImpl.prototype.return = function (value) { + var _this = this; + var returnSteps = function () { return _this._returnSteps(value); }; + return this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) : + returnSteps(); + }; + ReadableStreamAsyncIteratorImpl.prototype._nextSteps = function () { + var _this = this; + if (this._isFinished) { + return Promise.resolve({ value: undefined, done: true }); + } + var reader = this._reader; + var resolvePromise; + var rejectPromise; + var promise = newPromise(function (resolve, reject) { + resolvePromise = resolve; + rejectPromise = reject; + }); + var readRequest = { + _chunkSteps: function (chunk) { + _this._ongoingPromise = undefined; + // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test. + // FIXME Is this a bug in the specification, or in the test? + _queueMicrotask(function () { return resolvePromise({ value: chunk, done: false }); }); + }, + _closeSteps: function () { + _this._ongoingPromise = undefined; + _this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + resolvePromise({ value: undefined, done: true }); + }, + _errorSteps: function (reason) { + _this._ongoingPromise = undefined; + _this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + rejectPromise(reason); + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promise; + }; + ReadableStreamAsyncIteratorImpl.prototype._returnSteps = function (value) { + if (this._isFinished) { + return Promise.resolve({ value: value, done: true }); + } + this._isFinished = true; + var reader = this._reader; + if (!this._preventCancel) { + var result = ReadableStreamReaderGenericCancel(reader, value); + ReadableStreamReaderGenericRelease(reader); + return transformPromiseWith(result, function () { return ({ value: value, done: true }); }); + } + ReadableStreamReaderGenericRelease(reader); + return promiseResolvedWith({ value: value, done: true }); + }; + return ReadableStreamAsyncIteratorImpl; +}()); +var ReadableStreamAsyncIteratorPrototype = { + next: function () { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next')); + } + return this._asyncIteratorImpl.next(); + }, + return: function (value) { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return')); + } + return this._asyncIteratorImpl.return(value); + } +}; +Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype); +// Abstract operations for the ReadableStream. +function AcquireReadableStreamAsyncIterator(stream, preventCancel) { + var reader = AcquireReadableStreamDefaultReader(stream); + var impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel); + var iterator = Object.create(ReadableStreamAsyncIteratorPrototype); + iterator._asyncIteratorImpl = impl; + return iterator; +} +function IsReadableStreamAsyncIterator(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) { + return false; + } + try { + // noinspection SuspiciousTypeOfGuard + return x._asyncIteratorImpl instanceof + ReadableStreamAsyncIteratorImpl; + } + catch (_a) { + return false; + } +} +// Helper functions for the ReadableStream. +function streamAsyncIteratorBrandCheckException(name) { + return new TypeError("ReadableStreamAsyncIterator.".concat(name, " can only be used on a ReadableSteamAsyncIterator")); +} + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill +var NumberIsNaN = Number.isNaN || function (x) { + // eslint-disable-next-line no-self-compare + return x !== x; +}; + +function IsNonNegativeNumber(v) { + if (typeof v !== 'number') { + return false; + } + if (NumberIsNaN(v)) { + return false; + } + if (v < 0) { + return false; + } + return true; +} +function CloneAsUint8Array(O) { + var buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength); + return new Uint8Array(buffer); +} + +function DequeueValue(container) { + var pair = container._queue.shift(); + container._queueTotalSize -= pair.size; + if (container._queueTotalSize < 0) { + container._queueTotalSize = 0; + } + return pair.value; +} +function EnqueueValueWithSize(container, value, size) { + if (!IsNonNegativeNumber(size) || size === Infinity) { + throw new RangeError('Size must be a finite, non-NaN, non-negative number.'); + } + container._queue.push({ value: value, size: size }); + container._queueTotalSize += size; +} +function PeekQueueValue(container) { + var pair = container._queue.peek(); + return pair.value; +} +function ResetQueue(container) { + container._queue = new SimpleQueue(); + container._queueTotalSize = 0; +} + +function isDataViewConstructor(ctor) { + return ctor === DataView; +} +function isDataView(view) { + return isDataViewConstructor(view.constructor); +} +function arrayBufferViewElementSize(ctor) { + if (isDataViewConstructor(ctor)) { + return 1; + } + return ctor.BYTES_PER_ELEMENT; +} + +/** + * A pull-into request in a {@link ReadableByteStreamController}. + * + * @public + */ +var ReadableStreamBYOBRequest = /** @class */ (function () { + function ReadableStreamBYOBRequest() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(ReadableStreamBYOBRequest.prototype, "view", { + /** + * Returns the view for writing in to, or `null` if the BYOB request has already been responded to. + */ + get: function () { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('view'); + } + return this._view; + }, + enumerable: false, + configurable: true + }); + ReadableStreamBYOBRequest.prototype.respond = function (bytesWritten) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respond'); + } + assertRequiredArgument(bytesWritten, 1, 'respond'); + bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter'); + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(this._view.buffer)) { + throw new TypeError("The BYOB request's buffer has been detached and so cannot be used as a response"); + } + ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten); + }; + ReadableStreamBYOBRequest.prototype.respondWithNewView = function (view) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respondWithNewView'); + } + assertRequiredArgument(view, 1, 'respondWithNewView'); + if (!ArrayBuffer.isView(view)) { + throw new TypeError('You can only respond with array buffer views'); + } + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(view.buffer)) { + throw new TypeError('The given view\'s buffer has been detached and so cannot be used as a response'); + } + ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view); + }; + return ReadableStreamBYOBRequest; +}()); +Object.defineProperties(ReadableStreamBYOBRequest.prototype, { + respond: { enumerable: true }, + respondWithNewView: { enumerable: true }, + view: { enumerable: true } +}); +setFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond'); +setFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBRequest.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamBYOBRequest', + configurable: true + }); +} +/** + * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue. + * + * @public + */ +var ReadableByteStreamController = /** @class */ (function () { + function ReadableByteStreamController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(ReadableByteStreamController.prototype, "byobRequest", { + /** + * Returns the current BYOB pull request, or `null` if there isn't one. + */ + get: function () { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('byobRequest'); + } + return ReadableByteStreamControllerGetBYOBRequest(this); + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(ReadableByteStreamController.prototype, "desiredSize", { + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure. + */ + get: function () { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('desiredSize'); + } + return ReadableByteStreamControllerGetDesiredSize(this); + }, + enumerable: false, + configurable: true + }); + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + ReadableByteStreamController.prototype.close = function () { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('close'); + } + if (this._closeRequested) { + throw new TypeError('The stream has already been closed; do not close it again!'); + } + var state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError("The stream (in ".concat(state, " state) is not in the readable state and cannot be closed")); + } + ReadableByteStreamControllerClose(this); + }; + ReadableByteStreamController.prototype.enqueue = function (chunk) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('enqueue'); + } + assertRequiredArgument(chunk, 1, 'enqueue'); + if (!ArrayBuffer.isView(chunk)) { + throw new TypeError('chunk must be an array buffer view'); + } + if (chunk.byteLength === 0) { + throw new TypeError('chunk must have non-zero byteLength'); + } + if (chunk.buffer.byteLength === 0) { + throw new TypeError("chunk's buffer must have non-zero byteLength"); + } + if (this._closeRequested) { + throw new TypeError('stream is closed or draining'); + } + var state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError("The stream (in ".concat(state, " state) is not in the readable state and cannot be enqueued to")); + } + ReadableByteStreamControllerEnqueue(this, chunk); + }; + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + ReadableByteStreamController.prototype.error = function (e) { + if (e === void 0) { e = undefined; } + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('error'); + } + ReadableByteStreamControllerError(this, e); + }; + /** @internal */ + ReadableByteStreamController.prototype[CancelSteps] = function (reason) { + ReadableByteStreamControllerClearPendingPullIntos(this); + ResetQueue(this); + var result = this._cancelAlgorithm(reason); + ReadableByteStreamControllerClearAlgorithms(this); + return result; + }; + /** @internal */ + ReadableByteStreamController.prototype[PullSteps] = function (readRequest) { + var stream = this._controlledReadableByteStream; + if (this._queueTotalSize > 0) { + ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest); + return; + } + var autoAllocateChunkSize = this._autoAllocateChunkSize; + if (autoAllocateChunkSize !== undefined) { + var buffer = void 0; + try { + buffer = new ArrayBuffer(autoAllocateChunkSize); + } + catch (bufferE) { + readRequest._errorSteps(bufferE); + return; + } + var pullIntoDescriptor = { + buffer: buffer, + bufferByteLength: autoAllocateChunkSize, + byteOffset: 0, + byteLength: autoAllocateChunkSize, + bytesFilled: 0, + minimumFill: 1, + elementSize: 1, + viewConstructor: Uint8Array, + readerType: 'default' + }; + this._pendingPullIntos.push(pullIntoDescriptor); + } + ReadableStreamAddReadRequest(stream, readRequest); + ReadableByteStreamControllerCallPullIfNeeded(this); + }; + /** @internal */ + ReadableByteStreamController.prototype[ReleaseSteps] = function () { + if (this._pendingPullIntos.length > 0) { + var firstPullInto = this._pendingPullIntos.peek(); + firstPullInto.readerType = 'none'; + this._pendingPullIntos = new SimpleQueue(); + this._pendingPullIntos.push(firstPullInto); + } + }; + return ReadableByteStreamController; +}()); +Object.defineProperties(ReadableByteStreamController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + byobRequest: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(ReadableByteStreamController.prototype.close, 'close'); +setFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue'); +setFunctionName(ReadableByteStreamController.prototype.error, 'error'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableByteStreamController.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableByteStreamController', + configurable: true + }); +} +// Abstract operations for the ReadableByteStreamController. +function IsReadableByteStreamController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) { + return false; + } + return x instanceof ReadableByteStreamController; +} +function IsReadableStreamBYOBRequest(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) { + return false; + } + return x instanceof ReadableStreamBYOBRequest; +} +function ReadableByteStreamControllerCallPullIfNeeded(controller) { + var shouldPull = ReadableByteStreamControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + // TODO: Test controller argument + var pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, function () { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + return null; + }, function (e) { + ReadableByteStreamControllerError(controller, e); + return null; + }); +} +function ReadableByteStreamControllerClearPendingPullIntos(controller) { + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + controller._pendingPullIntos = new SimpleQueue(); +} +function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) { + var done = false; + if (stream._state === 'closed') { + done = true; + } + var filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'default') { + ReadableStreamFulfillReadRequest(stream, filledView, done); + } + else { + ReadableStreamFulfillReadIntoRequest(stream, filledView, done); + } +} +function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) { + var bytesFilled = pullIntoDescriptor.bytesFilled; + var elementSize = pullIntoDescriptor.elementSize; + return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize); +} +function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) { + controller._queue.push({ buffer: buffer, byteOffset: byteOffset, byteLength: byteLength }); + controller._queueTotalSize += byteLength; +} +function ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, buffer, byteOffset, byteLength) { + var clonedChunk; + try { + clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength); + } + catch (cloneE) { + ReadableByteStreamControllerError(controller, cloneE); + throw cloneE; + } + ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength); +} +function ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstDescriptor) { + if (firstDescriptor.bytesFilled > 0) { + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, firstDescriptor.buffer, firstDescriptor.byteOffset, firstDescriptor.bytesFilled); + } + ReadableByteStreamControllerShiftPendingPullInto(controller); +} +function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) { + var maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled); + var maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy; + var totalBytesToCopyRemaining = maxBytesToCopy; + var ready = false; + var remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize; + var maxAlignedBytes = maxBytesFilled - remainderBytes; + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) { + totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled; + ready = true; + } + var queue = controller._queue; + while (totalBytesToCopyRemaining > 0) { + var headOfQueue = queue.peek(); + var bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength); + var destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy); + if (headOfQueue.byteLength === bytesToCopy) { + queue.shift(); + } + else { + headOfQueue.byteOffset += bytesToCopy; + headOfQueue.byteLength -= bytesToCopy; + } + controller._queueTotalSize -= bytesToCopy; + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor); + totalBytesToCopyRemaining -= bytesToCopy; + } + return ready; +} +function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) { + pullIntoDescriptor.bytesFilled += size; +} +function ReadableByteStreamControllerHandleQueueDrain(controller) { + if (controller._queueTotalSize === 0 && controller._closeRequested) { + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(controller._controlledReadableByteStream); + } + else { + ReadableByteStreamControllerCallPullIfNeeded(controller); + } +} +function ReadableByteStreamControllerInvalidateBYOBRequest(controller) { + if (controller._byobRequest === null) { + return; + } + controller._byobRequest._associatedReadableByteStreamController = undefined; + controller._byobRequest._view = null; + controller._byobRequest = null; +} +function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) { + while (controller._pendingPullIntos.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + var pullIntoDescriptor = controller._pendingPullIntos.peek(); + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + } + } +} +function ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller) { + var reader = controller._controlledReadableByteStream._reader; + while (reader._readRequests.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + var readRequest = reader._readRequests.shift(); + ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest); + } +} +function ReadableByteStreamControllerPullInto(controller, view, min, readIntoRequest) { + var stream = controller._controlledReadableByteStream; + var ctor = view.constructor; + var elementSize = arrayBufferViewElementSize(ctor); + var byteOffset = view.byteOffset, byteLength = view.byteLength; + var minimumFill = min * elementSize; + var buffer; + try { + buffer = TransferArrayBuffer(view.buffer); + } + catch (e) { + readIntoRequest._errorSteps(e); + return; + } + var pullIntoDescriptor = { + buffer: buffer, + bufferByteLength: buffer.byteLength, + byteOffset: byteOffset, + byteLength: byteLength, + bytesFilled: 0, + minimumFill: minimumFill, + elementSize: elementSize, + viewConstructor: ctor, + readerType: 'byob' + }; + if (controller._pendingPullIntos.length > 0) { + controller._pendingPullIntos.push(pullIntoDescriptor); + // No ReadableByteStreamControllerCallPullIfNeeded() call since: + // - No change happens on desiredSize + // - The source has already been notified of that there's at least 1 pending read(view) + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + return; + } + if (stream._state === 'closed') { + var emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0); + readIntoRequest._closeSteps(emptyView); + return; + } + if (controller._queueTotalSize > 0) { + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + var filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + ReadableByteStreamControllerHandleQueueDrain(controller); + readIntoRequest._chunkSteps(filledView); + return; + } + if (controller._closeRequested) { + var e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + readIntoRequest._errorSteps(e); + return; + } + } + controller._pendingPullIntos.push(pullIntoDescriptor); + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) { + if (firstDescriptor.readerType === 'none') { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + var stream = controller._controlledReadableByteStream; + if (ReadableStreamHasBYOBReader(stream)) { + while (ReadableStreamGetNumReadIntoRequests(stream) > 0) { + var pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor); + } + } +} +function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) { + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + return; + } + if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) { + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + return; + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + var remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize; + if (remainderSize > 0) { + var end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, pullIntoDescriptor.buffer, end - remainderSize, remainderSize); + } + pullIntoDescriptor.bytesFilled -= remainderSize; + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); +} +function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) { + var firstDescriptor = controller._pendingPullIntos.peek(); + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + var state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor); + } + else { + ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerShiftPendingPullInto(controller) { + var descriptor = controller._pendingPullIntos.shift(); + return descriptor; +} +function ReadableByteStreamControllerShouldCallPull(controller) { + var stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return false; + } + if (controller._closeRequested) { + return false; + } + if (!controller._started) { + return false; + } + if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) { + return true; + } + var desiredSize = ReadableByteStreamControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; +} +function ReadableByteStreamControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; +} +// A client of ReadableByteStreamController may use these functions directly to bypass state check. +function ReadableByteStreamControllerClose(controller) { + var stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + if (controller._queueTotalSize > 0) { + controller._closeRequested = true; + return; + } + if (controller._pendingPullIntos.length > 0) { + var firstPendingPullInto = controller._pendingPullIntos.peek(); + if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) { + var e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + throw e; + } + } + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(stream); +} +function ReadableByteStreamControllerEnqueue(controller, chunk) { + var stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + var buffer = chunk.buffer, byteOffset = chunk.byteOffset, byteLength = chunk.byteLength; + if (IsDetachedBuffer(buffer)) { + throw new TypeError('chunk\'s buffer is detached and so cannot be enqueued'); + } + var transferredBuffer = TransferArrayBuffer(buffer); + if (controller._pendingPullIntos.length > 0) { + var firstPendingPullInto = controller._pendingPullIntos.peek(); + if (IsDetachedBuffer(firstPendingPullInto.buffer)) { + throw new TypeError('The BYOB request\'s buffer has been detached and so cannot be filled with an enqueued chunk'); + } + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer); + if (firstPendingPullInto.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto); + } + } + if (ReadableStreamHasDefaultReader(stream)) { + ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller); + if (ReadableStreamGetNumReadRequests(stream) === 0) { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + else { + if (controller._pendingPullIntos.length > 0) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + var transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength); + ReadableStreamFulfillReadRequest(stream, transferredView, false); + } + } + else if (ReadableStreamHasBYOBReader(stream)) { + // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully. + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + else { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerError(controller, e) { + var stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return; + } + ReadableByteStreamControllerClearPendingPullIntos(controller); + ResetQueue(controller); + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); +} +function ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest) { + var entry = controller._queue.shift(); + controller._queueTotalSize -= entry.byteLength; + ReadableByteStreamControllerHandleQueueDrain(controller); + var view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength); + readRequest._chunkSteps(view); +} +function ReadableByteStreamControllerGetBYOBRequest(controller) { + if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) { + var firstDescriptor = controller._pendingPullIntos.peek(); + var view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled); + var byobRequest = Object.create(ReadableStreamBYOBRequest.prototype); + SetUpReadableStreamBYOBRequest(byobRequest, controller, view); + controller._byobRequest = byobRequest; + } + return controller._byobRequest; +} +function ReadableByteStreamControllerGetDesiredSize(controller) { + var state = controller._controlledReadableByteStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; +} +function ReadableByteStreamControllerRespond(controller, bytesWritten) { + var firstDescriptor = controller._pendingPullIntos.peek(); + var state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (bytesWritten !== 0) { + throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream'); + } + } + else { + if (bytesWritten === 0) { + throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream'); + } + if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) { + throw new RangeError('bytesWritten out of range'); + } + } + firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer); + ReadableByteStreamControllerRespondInternal(controller, bytesWritten); +} +function ReadableByteStreamControllerRespondWithNewView(controller, view) { + var firstDescriptor = controller._pendingPullIntos.peek(); + var state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (view.byteLength !== 0) { + throw new TypeError('The view\'s length must be 0 when calling respondWithNewView() on a closed stream'); + } + } + else { + if (view.byteLength === 0) { + throw new TypeError('The view\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'); + } + } + if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) { + throw new RangeError('The region specified by view does not match byobRequest'); + } + if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) { + throw new RangeError('The buffer of view has different capacity than byobRequest'); + } + if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) { + throw new RangeError('The region specified by view is larger than byobRequest'); + } + var viewByteLength = view.byteLength; + firstDescriptor.buffer = TransferArrayBuffer(view.buffer); + ReadableByteStreamControllerRespondInternal(controller, viewByteLength); +} +function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) { + controller._controlledReadableByteStream = stream; + controller._pullAgain = false; + controller._pulling = false; + controller._byobRequest = null; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._closeRequested = false; + controller._started = false; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._autoAllocateChunkSize = autoAllocateChunkSize; + controller._pendingPullIntos = new SimpleQueue(); + stream._readableStreamController = controller; + var startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), function () { + controller._started = true; + ReadableByteStreamControllerCallPullIfNeeded(controller); + return null; + }, function (r) { + ReadableByteStreamControllerError(controller, r); + return null; + }); +} +function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) { + var controller = Object.create(ReadableByteStreamController.prototype); + var startAlgorithm; + var pullAlgorithm; + var cancelAlgorithm; + if (underlyingByteSource.start !== undefined) { + startAlgorithm = function () { return underlyingByteSource.start(controller); }; + } + else { + startAlgorithm = function () { return undefined; }; + } + if (underlyingByteSource.pull !== undefined) { + pullAlgorithm = function () { return underlyingByteSource.pull(controller); }; + } + else { + pullAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingByteSource.cancel !== undefined) { + cancelAlgorithm = function (reason) { return underlyingByteSource.cancel(reason); }; + } + else { + cancelAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + var autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize; + if (autoAllocateChunkSize === 0) { + throw new TypeError('autoAllocateChunkSize must be greater than 0'); + } + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize); +} +function SetUpReadableStreamBYOBRequest(request, controller, view) { + request._associatedReadableByteStreamController = controller; + request._view = view; +} +// Helper functions for the ReadableStreamBYOBRequest. +function byobRequestBrandCheckException(name) { + return new TypeError("ReadableStreamBYOBRequest.prototype.".concat(name, " can only be used on a ReadableStreamBYOBRequest")); +} +// Helper functions for the ReadableByteStreamController. +function byteStreamControllerBrandCheckException(name) { + return new TypeError("ReadableByteStreamController.prototype.".concat(name, " can only be used on a ReadableByteStreamController")); +} + +function convertReaderOptions(options, context) { + assertDictionary(options, context); + var mode = options === null || options === void 0 ? void 0 : options.mode; + return { + mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, "".concat(context, " has member 'mode' that")) + }; +} +function convertReadableStreamReaderMode(mode, context) { + mode = "".concat(mode); + if (mode !== 'byob') { + throw new TypeError("".concat(context, " '").concat(mode, "' is not a valid enumeration value for ReadableStreamReaderMode")); + } + return mode; +} +function convertByobReadOptions(options, context) { + var _a; + assertDictionary(options, context); + var min = (_a = options === null || options === void 0 ? void 0 : options.min) !== null && _a !== void 0 ? _a : 1; + return { + min: convertUnsignedLongLongWithEnforceRange(min, "".concat(context, " has member 'min' that")) + }; +} + +// Abstract operations for the ReadableStream. +function AcquireReadableStreamBYOBReader(stream) { + return new ReadableStreamBYOBReader(stream); +} +// ReadableStream API exposed for controllers. +function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) { + stream._reader._readIntoRequests.push(readIntoRequest); +} +function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) { + var reader = stream._reader; + var readIntoRequest = reader._readIntoRequests.shift(); + if (done) { + readIntoRequest._closeSteps(chunk); + } + else { + readIntoRequest._chunkSteps(chunk); + } +} +function ReadableStreamGetNumReadIntoRequests(stream) { + return stream._reader._readIntoRequests.length; +} +function ReadableStreamHasBYOBReader(stream) { + var reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamBYOBReader(reader)) { + return false; + } + return true; +} +/** + * A BYOB reader vended by a {@link ReadableStream}. + * + * @public + */ +var ReadableStreamBYOBReader = /** @class */ (function () { + function ReadableStreamBYOBReader(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + if (!IsReadableByteStreamController(stream._readableStreamController)) { + throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' + + 'source'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readIntoRequests = new SimpleQueue(); + } + Object.defineProperty(ReadableStreamBYOBReader.prototype, "closed", { + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the reader's lock is released before the stream finishes closing. + */ + get: function () { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('closed')); + } + return this._closedPromise; + }, + enumerable: false, + configurable: true + }); + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + ReadableStreamBYOBReader.prototype.cancel = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + }; + ReadableStreamBYOBReader.prototype.read = function (view, rawOptions) { + if (rawOptions === void 0) { rawOptions = {}; } + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('read')); + } + if (!ArrayBuffer.isView(view)) { + return promiseRejectedWith(new TypeError('view must be an array buffer view')); + } + if (view.byteLength === 0) { + return promiseRejectedWith(new TypeError('view must have non-zero byteLength')); + } + if (view.buffer.byteLength === 0) { + return promiseRejectedWith(new TypeError("view's buffer must have non-zero byteLength")); + } + if (IsDetachedBuffer(view.buffer)) { + return promiseRejectedWith(new TypeError('view\'s buffer has been detached')); + } + var options; + try { + options = convertByobReadOptions(rawOptions, 'options'); + } + catch (e) { + return promiseRejectedWith(e); + } + var min = options.min; + if (min === 0) { + return promiseRejectedWith(new TypeError('options.min must be greater than 0')); + } + if (!isDataView(view)) { + if (min > view.length) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s length')); + } + } + else if (min > view.byteLength) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s byteLength')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + var resolvePromise; + var rejectPromise; + var promise = newPromise(function (resolve, reject) { + resolvePromise = resolve; + rejectPromise = reject; + }); + var readIntoRequest = { + _chunkSteps: function (chunk) { return resolvePromise({ value: chunk, done: false }); }, + _closeSteps: function (chunk) { return resolvePromise({ value: chunk, done: true }); }, + _errorSteps: function (e) { return rejectPromise(e); } + }; + ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest); + return promise; + }; + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + ReadableStreamBYOBReader.prototype.releaseLock = function () { + if (!IsReadableStreamBYOBReader(this)) { + throw byobReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamBYOBReaderRelease(this); + }; + return ReadableStreamBYOBReader; +}()); +Object.defineProperties(ReadableStreamBYOBReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } +}); +setFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel'); +setFunctionName(ReadableStreamBYOBReader.prototype.read, 'read'); +setFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBReader.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamBYOBReader', + configurable: true + }); +} +// Abstract operations for the readers. +function IsReadableStreamBYOBReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) { + return false; + } + return x instanceof ReadableStreamBYOBReader; +} +function ReadableStreamBYOBReaderRead(reader, view, min, readIntoRequest) { + var stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'errored') { + readIntoRequest._errorSteps(stream._storedError); + } + else { + ReadableByteStreamControllerPullInto(stream._readableStreamController, view, min, readIntoRequest); + } +} +function ReadableStreamBYOBReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + var e = new TypeError('Reader was released'); + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); +} +function ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e) { + var readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(function (readIntoRequest) { + readIntoRequest._errorSteps(e); + }); +} +// Helper functions for the ReadableStreamBYOBReader. +function byobReaderBrandCheckException(name) { + return new TypeError("ReadableStreamBYOBReader.prototype.".concat(name, " can only be used on a ReadableStreamBYOBReader")); +} + +function ExtractHighWaterMark(strategy, defaultHWM) { + var highWaterMark = strategy.highWaterMark; + if (highWaterMark === undefined) { + return defaultHWM; + } + if (NumberIsNaN(highWaterMark) || highWaterMark < 0) { + throw new RangeError('Invalid highWaterMark'); + } + return highWaterMark; +} +function ExtractSizeAlgorithm(strategy) { + var size = strategy.size; + if (!size) { + return function () { return 1; }; + } + return size; +} + +function convertQueuingStrategy(init, context) { + assertDictionary(init, context); + var highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + var size = init === null || init === void 0 ? void 0 : init.size; + return { + highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark), + size: size === undefined ? undefined : convertQueuingStrategySize(size, "".concat(context, " has member 'size' that")) + }; +} +function convertQueuingStrategySize(fn, context) { + assertFunction(fn, context); + return function (chunk) { return convertUnrestrictedDouble(fn(chunk)); }; +} + +function convertUnderlyingSink(original, context) { + assertDictionary(original, context); + var abort = original === null || original === void 0 ? void 0 : original.abort; + var close = original === null || original === void 0 ? void 0 : original.close; + var start = original === null || original === void 0 ? void 0 : original.start; + var type = original === null || original === void 0 ? void 0 : original.type; + var write = original === null || original === void 0 ? void 0 : original.write; + return { + abort: abort === undefined ? + undefined : + convertUnderlyingSinkAbortCallback(abort, original, "".concat(context, " has member 'abort' that")), + close: close === undefined ? + undefined : + convertUnderlyingSinkCloseCallback(close, original, "".concat(context, " has member 'close' that")), + start: start === undefined ? + undefined : + convertUnderlyingSinkStartCallback(start, original, "".concat(context, " has member 'start' that")), + write: write === undefined ? + undefined : + convertUnderlyingSinkWriteCallback(write, original, "".concat(context, " has member 'write' that")), + type: type + }; +} +function convertUnderlyingSinkAbortCallback(fn, original, context) { + assertFunction(fn, context); + return function (reason) { return promiseCall(fn, original, [reason]); }; +} +function convertUnderlyingSinkCloseCallback(fn, original, context) { + assertFunction(fn, context); + return function () { return promiseCall(fn, original, []); }; +} +function convertUnderlyingSinkStartCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return reflectCall(fn, original, [controller]); }; +} +function convertUnderlyingSinkWriteCallback(fn, original, context) { + assertFunction(fn, context); + return function (chunk, controller) { return promiseCall(fn, original, [chunk, controller]); }; +} + +function assertWritableStream(x, context) { + if (!IsWritableStream(x)) { + throw new TypeError("".concat(context, " is not a WritableStream.")); + } +} + +function isAbortSignal(value) { + if (typeof value !== 'object' || value === null) { + return false; + } + try { + return typeof value.aborted === 'boolean'; + } + catch (_a) { + // AbortSignal.prototype.aborted throws if its brand check fails + return false; + } +} +var supportsAbortController = typeof AbortController === 'function'; +/** + * Construct a new AbortController, if supported by the platform. + * + * @internal + */ +function createAbortController() { + if (supportsAbortController) { + return new AbortController(); + } + return undefined; +} + +/** + * A writable stream represents a destination for data, into which you can write. + * + * @public + */ +var WritableStream = /** @class */ (function () { + function WritableStream(rawUnderlyingSink, rawStrategy) { + if (rawUnderlyingSink === void 0) { rawUnderlyingSink = {}; } + if (rawStrategy === void 0) { rawStrategy = {}; } + if (rawUnderlyingSink === undefined) { + rawUnderlyingSink = null; + } + else { + assertObject(rawUnderlyingSink, 'First parameter'); + } + var strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + var underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter'); + InitializeWritableStream(this); + var type = underlyingSink.type; + if (type !== undefined) { + throw new RangeError('Invalid type is specified'); + } + var sizeAlgorithm = ExtractSizeAlgorithm(strategy); + var highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm); + } + Object.defineProperty(WritableStream.prototype, "locked", { + /** + * Returns whether or not the writable stream is locked to a writer. + */ + get: function () { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('locked'); + } + return IsWritableStreamLocked(this); + }, + enumerable: false, + configurable: true + }); + /** + * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be + * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort + * mechanism of the underlying sink. + * + * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled + * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel + * the stream) if the stream is currently locked. + */ + WritableStream.prototype.abort = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('abort')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer')); + } + return WritableStreamAbort(this, reason); + }; + /** + * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its + * close behavior. During this time any further attempts to write will fail (without erroring the stream). + * + * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream + * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with + * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked. + */ + WritableStream.prototype.close = function () { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('close')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer')); + } + if (WritableStreamCloseQueuedOrInFlight(this)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamClose(this); + }; + /** + * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream + * is locked, no other writer can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to write to a stream + * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at + * the same time, which would cause the resulting written data to be unpredictable and probably useless. + */ + WritableStream.prototype.getWriter = function () { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('getWriter'); + } + return AcquireWritableStreamDefaultWriter(this); + }; + return WritableStream; +}()); +Object.defineProperties(WritableStream.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + getWriter: { enumerable: true }, + locked: { enumerable: true } +}); +setFunctionName(WritableStream.prototype.abort, 'abort'); +setFunctionName(WritableStream.prototype.close, 'close'); +setFunctionName(WritableStream.prototype.getWriter, 'getWriter'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(WritableStream.prototype, SymbolPolyfill.toStringTag, { + value: 'WritableStream', + configurable: true + }); +} +// Abstract operations for the WritableStream. +function AcquireWritableStreamDefaultWriter(stream) { + return new WritableStreamDefaultWriter(stream); +} +// Throws if and only if startAlgorithm throws. +function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + if (highWaterMark === void 0) { highWaterMark = 1; } + if (sizeAlgorithm === void 0) { sizeAlgorithm = function () { return 1; }; } + var stream = Object.create(WritableStream.prototype); + InitializeWritableStream(stream); + var controller = Object.create(WritableStreamDefaultController.prototype); + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + return stream; +} +function InitializeWritableStream(stream) { + stream._state = 'writable'; + // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is + // 'erroring' or 'errored'. May be set to an undefined value. + stream._storedError = undefined; + stream._writer = undefined; + // Initialize to undefined first because the constructor of the controller checks this + // variable to validate the caller. + stream._writableStreamController = undefined; + // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data + // producer without waiting for the queued writes to finish. + stream._writeRequests = new SimpleQueue(); + // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents + // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here. + stream._inFlightWriteRequest = undefined; + // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer + // has been detached. + stream._closeRequest = undefined; + // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it + // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here. + stream._inFlightCloseRequest = undefined; + // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached. + stream._pendingAbortRequest = undefined; + // The backpressure signal set by the controller. + stream._backpressure = false; +} +function IsWritableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) { + return false; + } + return x instanceof WritableStream; +} +function IsWritableStreamLocked(stream) { + if (stream._writer === undefined) { + return false; + } + return true; +} +function WritableStreamAbort(stream, reason) { + var _a; + if (stream._state === 'closed' || stream._state === 'errored') { + return promiseResolvedWith(undefined); + } + stream._writableStreamController._abortReason = reason; + (_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort(reason); + // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring', + // but it doesn't know that signaling abort runs author code that might have changed the state. + // Widen the type again by casting to WritableStreamState. + var state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseResolvedWith(undefined); + } + if (stream._pendingAbortRequest !== undefined) { + return stream._pendingAbortRequest._promise; + } + var wasAlreadyErroring = false; + if (state === 'erroring') { + wasAlreadyErroring = true; + // reason will not be used, so don't keep a reference to it. + reason = undefined; + } + var promise = newPromise(function (resolve, reject) { + stream._pendingAbortRequest = { + _promise: undefined, + _resolve: resolve, + _reject: reject, + _reason: reason, + _wasAlreadyErroring: wasAlreadyErroring + }; + }); + stream._pendingAbortRequest._promise = promise; + if (!wasAlreadyErroring) { + WritableStreamStartErroring(stream, reason); + } + return promise; +} +function WritableStreamClose(stream) { + var state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseRejectedWith(new TypeError("The stream (in ".concat(state, " state) is not in the writable state and cannot be closed"))); + } + var promise = newPromise(function (resolve, reject) { + var closeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._closeRequest = closeRequest; + }); + var writer = stream._writer; + if (writer !== undefined && stream._backpressure && state === 'writable') { + defaultWriterReadyPromiseResolve(writer); + } + WritableStreamDefaultControllerClose(stream._writableStreamController); + return promise; +} +// WritableStream API exposed for controllers. +function WritableStreamAddWriteRequest(stream) { + var promise = newPromise(function (resolve, reject) { + var writeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._writeRequests.push(writeRequest); + }); + return promise; +} +function WritableStreamDealWithRejection(stream, error) { + var state = stream._state; + if (state === 'writable') { + WritableStreamStartErroring(stream, error); + return; + } + WritableStreamFinishErroring(stream); +} +function WritableStreamStartErroring(stream, reason) { + var controller = stream._writableStreamController; + stream._state = 'erroring'; + stream._storedError = reason; + var writer = stream._writer; + if (writer !== undefined) { + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason); + } + if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) { + WritableStreamFinishErroring(stream); + } +} +function WritableStreamFinishErroring(stream) { + stream._state = 'errored'; + stream._writableStreamController[ErrorSteps](); + var storedError = stream._storedError; + stream._writeRequests.forEach(function (writeRequest) { + writeRequest._reject(storedError); + }); + stream._writeRequests = new SimpleQueue(); + if (stream._pendingAbortRequest === undefined) { + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + var abortRequest = stream._pendingAbortRequest; + stream._pendingAbortRequest = undefined; + if (abortRequest._wasAlreadyErroring) { + abortRequest._reject(storedError); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + var promise = stream._writableStreamController[AbortSteps](abortRequest._reason); + uponPromise(promise, function () { + abortRequest._resolve(); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }, function (reason) { + abortRequest._reject(reason); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }); +} +function WritableStreamFinishInFlightWrite(stream) { + stream._inFlightWriteRequest._resolve(undefined); + stream._inFlightWriteRequest = undefined; +} +function WritableStreamFinishInFlightWriteWithError(stream, error) { + stream._inFlightWriteRequest._reject(error); + stream._inFlightWriteRequest = undefined; + WritableStreamDealWithRejection(stream, error); +} +function WritableStreamFinishInFlightClose(stream) { + stream._inFlightCloseRequest._resolve(undefined); + stream._inFlightCloseRequest = undefined; + var state = stream._state; + if (state === 'erroring') { + // The error was too late to do anything, so it is ignored. + stream._storedError = undefined; + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._resolve(); + stream._pendingAbortRequest = undefined; + } + } + stream._state = 'closed'; + var writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseResolve(writer); + } +} +function WritableStreamFinishInFlightCloseWithError(stream, error) { + stream._inFlightCloseRequest._reject(error); + stream._inFlightCloseRequest = undefined; + // Never execute sink abort() after sink close(). + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._reject(error); + stream._pendingAbortRequest = undefined; + } + WritableStreamDealWithRejection(stream, error); +} +// TODO(ricea): Fix alphabetical order. +function WritableStreamCloseQueuedOrInFlight(stream) { + if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; +} +function WritableStreamHasOperationMarkedInFlight(stream) { + if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; +} +function WritableStreamMarkCloseRequestInFlight(stream) { + stream._inFlightCloseRequest = stream._closeRequest; + stream._closeRequest = undefined; +} +function WritableStreamMarkFirstWriteRequestInFlight(stream) { + stream._inFlightWriteRequest = stream._writeRequests.shift(); +} +function WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) { + if (stream._closeRequest !== undefined) { + stream._closeRequest._reject(stream._storedError); + stream._closeRequest = undefined; + } + var writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseReject(writer, stream._storedError); + } +} +function WritableStreamUpdateBackpressure(stream, backpressure) { + var writer = stream._writer; + if (writer !== undefined && backpressure !== stream._backpressure) { + if (backpressure) { + defaultWriterReadyPromiseReset(writer); + } + else { + defaultWriterReadyPromiseResolve(writer); + } + } + stream._backpressure = backpressure; +} +/** + * A default writer vended by a {@link WritableStream}. + * + * @public + */ +var WritableStreamDefaultWriter = /** @class */ (function () { + function WritableStreamDefaultWriter(stream) { + assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter'); + assertWritableStream(stream, 'First parameter'); + if (IsWritableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive writing by another writer'); + } + this._ownerWritableStream = stream; + stream._writer = this; + var state = stream._state; + if (state === 'writable') { + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) { + defaultWriterReadyPromiseInitialize(this); + } + else { + defaultWriterReadyPromiseInitializeAsResolved(this); + } + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'erroring') { + defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError); + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'closed') { + defaultWriterReadyPromiseInitializeAsResolved(this); + defaultWriterClosedPromiseInitializeAsResolved(this); + } + else { + var storedError = stream._storedError; + defaultWriterReadyPromiseInitializeAsRejected(this, storedError); + defaultWriterClosedPromiseInitializeAsRejected(this, storedError); + } + } + Object.defineProperty(WritableStreamDefaultWriter.prototype, "closed", { + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the writer’s lock is released before the stream finishes closing. + */ + get: function () { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('closed')); + } + return this._closedPromise; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(WritableStreamDefaultWriter.prototype, "desiredSize", { + /** + * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full. + * A producer can use this information to determine the right amount of data to write. + * + * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort + * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when + * the writer’s lock is released. + */ + get: function () { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('desiredSize'); + } + if (this._ownerWritableStream === undefined) { + throw defaultWriterLockException('desiredSize'); + } + return WritableStreamDefaultWriterGetDesiredSize(this); + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(WritableStreamDefaultWriter.prototype, "ready", { + /** + * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions + * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips + * back to zero or below, the getter will return a new promise that stays pending until the next transition. + * + * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become + * rejected. + */ + get: function () { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('ready')); + } + return this._readyPromise; + }, + enumerable: false, + configurable: true + }); + /** + * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}. + */ + WritableStreamDefaultWriter.prototype.abort = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('abort')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('abort')); + } + return WritableStreamDefaultWriterAbort(this, reason); + }; + /** + * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}. + */ + WritableStreamDefaultWriter.prototype.close = function () { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('close')); + } + var stream = this._ownerWritableStream; + if (stream === undefined) { + return promiseRejectedWith(defaultWriterLockException('close')); + } + if (WritableStreamCloseQueuedOrInFlight(stream)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamDefaultWriterClose(this); + }; + /** + * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active. + * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from + * now on; otherwise, the writer will appear closed. + * + * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the + * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled). + * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents + * other producers from writing in an interleaved manner. + */ + WritableStreamDefaultWriter.prototype.releaseLock = function () { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('releaseLock'); + } + var stream = this._ownerWritableStream; + if (stream === undefined) { + return; + } + WritableStreamDefaultWriterRelease(this); + }; + WritableStreamDefaultWriter.prototype.write = function (chunk) { + if (chunk === void 0) { chunk = undefined; } + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('write')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + return WritableStreamDefaultWriterWrite(this, chunk); + }; + return WritableStreamDefaultWriter; +}()); +Object.defineProperties(WritableStreamDefaultWriter.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + releaseLock: { enumerable: true }, + write: { enumerable: true }, + closed: { enumerable: true }, + desiredSize: { enumerable: true }, + ready: { enumerable: true } +}); +setFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort'); +setFunctionName(WritableStreamDefaultWriter.prototype.close, 'close'); +setFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock'); +setFunctionName(WritableStreamDefaultWriter.prototype.write, 'write'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultWriter.prototype, SymbolPolyfill.toStringTag, { + value: 'WritableStreamDefaultWriter', + configurable: true + }); +} +// Abstract operations for the WritableStreamDefaultWriter. +function IsWritableStreamDefaultWriter(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultWriter; +} +// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check. +function WritableStreamDefaultWriterAbort(writer, reason) { + var stream = writer._ownerWritableStream; + return WritableStreamAbort(stream, reason); +} +function WritableStreamDefaultWriterClose(writer) { + var stream = writer._ownerWritableStream; + return WritableStreamClose(stream); +} +function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) { + var stream = writer._ownerWritableStream; + var state = stream._state; + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseResolvedWith(undefined); + } + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + return WritableStreamDefaultWriterClose(writer); +} +function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) { + if (writer._closedPromiseState === 'pending') { + defaultWriterClosedPromiseReject(writer, error); + } + else { + defaultWriterClosedPromiseResetToRejected(writer, error); + } +} +function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) { + if (writer._readyPromiseState === 'pending') { + defaultWriterReadyPromiseReject(writer, error); + } + else { + defaultWriterReadyPromiseResetToRejected(writer, error); + } +} +function WritableStreamDefaultWriterGetDesiredSize(writer) { + var stream = writer._ownerWritableStream; + var state = stream._state; + if (state === 'errored' || state === 'erroring') { + return null; + } + if (state === 'closed') { + return 0; + } + return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController); +} +function WritableStreamDefaultWriterRelease(writer) { + var stream = writer._ownerWritableStream; + var releasedError = new TypeError("Writer was released and can no longer be used to monitor the stream's closedness"); + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError); + // The state transitions to "errored" before the sink abort() method runs, but the writer.closed promise is not + // rejected until afterwards. This means that simply testing state will not work. + WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError); + stream._writer = undefined; + writer._ownerWritableStream = undefined; +} +function WritableStreamDefaultWriterWrite(writer, chunk) { + var stream = writer._ownerWritableStream; + var controller = stream._writableStreamController; + var chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk); + if (stream !== writer._ownerWritableStream) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + var state = stream._state; + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to')); + } + if (state === 'erroring') { + return promiseRejectedWith(stream._storedError); + } + var promise = WritableStreamAddWriteRequest(stream); + WritableStreamDefaultControllerWrite(controller, chunk, chunkSize); + return promise; +} +var closeSentinel = {}; +/** + * Allows control of a {@link WritableStream | writable stream}'s state and internal queue. + * + * @public + */ +var WritableStreamDefaultController = /** @class */ (function () { + function WritableStreamDefaultController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(WritableStreamDefaultController.prototype, "abortReason", { + /** + * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted. + * + * @deprecated + * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177. + * Use {@link WritableStreamDefaultController.signal}'s `reason` instead. + */ + get: function () { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('abortReason'); + } + return this._abortReason; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(WritableStreamDefaultController.prototype, "signal", { + /** + * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted. + */ + get: function () { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('signal'); + } + if (this._abortController === undefined) { + // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`. + // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill, + // so instead we only implement support for `signal` if we find a global `AbortController` constructor. + throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported'); + } + return this._abortController.signal; + }, + enumerable: false, + configurable: true + }); + /** + * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`. + * + * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying + * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the + * normal lifecycle of interactions with the underlying sink. + */ + WritableStreamDefaultController.prototype.error = function (e) { + if (e === void 0) { e = undefined; } + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('error'); + } + var state = this._controlledWritableStream._state; + if (state !== 'writable') { + // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so + // just treat it as a no-op. + return; + } + WritableStreamDefaultControllerError(this, e); + }; + /** @internal */ + WritableStreamDefaultController.prototype[AbortSteps] = function (reason) { + var result = this._abortAlgorithm(reason); + WritableStreamDefaultControllerClearAlgorithms(this); + return result; + }; + /** @internal */ + WritableStreamDefaultController.prototype[ErrorSteps] = function () { + ResetQueue(this); + }; + return WritableStreamDefaultController; +}()); +Object.defineProperties(WritableStreamDefaultController.prototype, { + abortReason: { enumerable: true }, + signal: { enumerable: true }, + error: { enumerable: true } +}); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultController.prototype, SymbolPolyfill.toStringTag, { + value: 'WritableStreamDefaultController', + configurable: true + }); +} +// Abstract operations implementing interface required by the WritableStream. +function IsWritableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultController; +} +function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledWritableStream = stream; + stream._writableStreamController = controller; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._abortReason = undefined; + controller._abortController = createAbortController(); + controller._started = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._writeAlgorithm = writeAlgorithm; + controller._closeAlgorithm = closeAlgorithm; + controller._abortAlgorithm = abortAlgorithm; + var backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + var startResult = startAlgorithm(); + var startPromise = promiseResolvedWith(startResult); + uponPromise(startPromise, function () { + controller._started = true; + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, function (r) { + controller._started = true; + WritableStreamDealWithRejection(stream, r); + return null; + }); +} +function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) { + var controller = Object.create(WritableStreamDefaultController.prototype); + var startAlgorithm; + var writeAlgorithm; + var closeAlgorithm; + var abortAlgorithm; + if (underlyingSink.start !== undefined) { + startAlgorithm = function () { return underlyingSink.start(controller); }; + } + else { + startAlgorithm = function () { return undefined; }; + } + if (underlyingSink.write !== undefined) { + writeAlgorithm = function (chunk) { return underlyingSink.write(chunk, controller); }; + } + else { + writeAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingSink.close !== undefined) { + closeAlgorithm = function () { return underlyingSink.close(); }; + } + else { + closeAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingSink.abort !== undefined) { + abortAlgorithm = function (reason) { return underlyingSink.abort(reason); }; + } + else { + abortAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); +} +// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls. +function WritableStreamDefaultControllerClearAlgorithms(controller) { + controller._writeAlgorithm = undefined; + controller._closeAlgorithm = undefined; + controller._abortAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; +} +function WritableStreamDefaultControllerClose(controller) { + EnqueueValueWithSize(controller, closeSentinel, 0); + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); +} +function WritableStreamDefaultControllerGetChunkSize(controller, chunk) { + try { + return controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE); + return 1; + } +} +function WritableStreamDefaultControllerGetDesiredSize(controller) { + return controller._strategyHWM - controller._queueTotalSize; +} +function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) { + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE); + return; + } + var stream = controller._controlledWritableStream; + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') { + var backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); +} +// Abstract operations for the WritableStreamDefaultController. +function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) { + var stream = controller._controlledWritableStream; + if (!controller._started) { + return; + } + if (stream._inFlightWriteRequest !== undefined) { + return; + } + var state = stream._state; + if (state === 'erroring') { + WritableStreamFinishErroring(stream); + return; + } + if (controller._queue.length === 0) { + return; + } + var value = PeekQueueValue(controller); + if (value === closeSentinel) { + WritableStreamDefaultControllerProcessClose(controller); + } + else { + WritableStreamDefaultControllerProcessWrite(controller, value); + } +} +function WritableStreamDefaultControllerErrorIfNeeded(controller, error) { + if (controller._controlledWritableStream._state === 'writable') { + WritableStreamDefaultControllerError(controller, error); + } +} +function WritableStreamDefaultControllerProcessClose(controller) { + var stream = controller._controlledWritableStream; + WritableStreamMarkCloseRequestInFlight(stream); + DequeueValue(controller); + var sinkClosePromise = controller._closeAlgorithm(); + WritableStreamDefaultControllerClearAlgorithms(controller); + uponPromise(sinkClosePromise, function () { + WritableStreamFinishInFlightClose(stream); + return null; + }, function (reason) { + WritableStreamFinishInFlightCloseWithError(stream, reason); + return null; + }); +} +function WritableStreamDefaultControllerProcessWrite(controller, chunk) { + var stream = controller._controlledWritableStream; + WritableStreamMarkFirstWriteRequestInFlight(stream); + var sinkWritePromise = controller._writeAlgorithm(chunk); + uponPromise(sinkWritePromise, function () { + WritableStreamFinishInFlightWrite(stream); + var state = stream._state; + DequeueValue(controller); + if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') { + var backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, function (reason) { + if (stream._state === 'writable') { + WritableStreamDefaultControllerClearAlgorithms(controller); + } + WritableStreamFinishInFlightWriteWithError(stream, reason); + return null; + }); +} +function WritableStreamDefaultControllerGetBackpressure(controller) { + var desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller); + return desiredSize <= 0; +} +// A client of WritableStreamDefaultController may use these functions directly to bypass state check. +function WritableStreamDefaultControllerError(controller, error) { + var stream = controller._controlledWritableStream; + WritableStreamDefaultControllerClearAlgorithms(controller); + WritableStreamStartErroring(stream, error); +} +// Helper functions for the WritableStream. +function streamBrandCheckException$2(name) { + return new TypeError("WritableStream.prototype.".concat(name, " can only be used on a WritableStream")); +} +// Helper functions for the WritableStreamDefaultController. +function defaultControllerBrandCheckException$2(name) { + return new TypeError("WritableStreamDefaultController.prototype.".concat(name, " can only be used on a WritableStreamDefaultController")); +} +// Helper functions for the WritableStreamDefaultWriter. +function defaultWriterBrandCheckException(name) { + return new TypeError("WritableStreamDefaultWriter.prototype.".concat(name, " can only be used on a WritableStreamDefaultWriter")); +} +function defaultWriterLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released writer'); +} +function defaultWriterClosedPromiseInitialize(writer) { + writer._closedPromise = newPromise(function (resolve, reject) { + writer._closedPromise_resolve = resolve; + writer._closedPromise_reject = reject; + writer._closedPromiseState = 'pending'; + }); +} +function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseReject(writer, reason); +} +function defaultWriterClosedPromiseInitializeAsResolved(writer) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseResolve(writer); +} +function defaultWriterClosedPromiseReject(writer, reason) { + if (writer._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._closedPromise); + writer._closedPromise_reject(reason); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'rejected'; +} +function defaultWriterClosedPromiseResetToRejected(writer, reason) { + defaultWriterClosedPromiseInitializeAsRejected(writer, reason); +} +function defaultWriterClosedPromiseResolve(writer) { + if (writer._closedPromise_resolve === undefined) { + return; + } + writer._closedPromise_resolve(undefined); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'resolved'; +} +function defaultWriterReadyPromiseInitialize(writer) { + writer._readyPromise = newPromise(function (resolve, reject) { + writer._readyPromise_resolve = resolve; + writer._readyPromise_reject = reject; + }); + writer._readyPromiseState = 'pending'; +} +function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseReject(writer, reason); +} +function defaultWriterReadyPromiseInitializeAsResolved(writer) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseResolve(writer); +} +function defaultWriterReadyPromiseReject(writer, reason) { + if (writer._readyPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._readyPromise); + writer._readyPromise_reject(reason); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'rejected'; +} +function defaultWriterReadyPromiseReset(writer) { + defaultWriterReadyPromiseInitialize(writer); +} +function defaultWriterReadyPromiseResetToRejected(writer, reason) { + defaultWriterReadyPromiseInitializeAsRejected(writer, reason); +} +function defaultWriterReadyPromiseResolve(writer) { + if (writer._readyPromise_resolve === undefined) { + return; + } + writer._readyPromise_resolve(undefined); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'fulfilled'; +} + +/// +function getGlobals() { + if (typeof globalThis !== 'undefined') { + return globalThis; + } + else if (typeof self !== 'undefined') { + return self; + } + else if (typeof global !== 'undefined') { + return global; + } + return undefined; +} +var globals = getGlobals(); + +/// +function isDOMExceptionConstructor(ctor) { + if (!(typeof ctor === 'function' || typeof ctor === 'object')) { + return false; + } + if (ctor.name !== 'DOMException') { + return false; + } + try { + new ctor(); + return true; + } + catch (_a) { + return false; + } +} +/** + * Support: + * - Web browsers + * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87) + */ +function getFromGlobal() { + var ctor = globals === null || globals === void 0 ? void 0 : globals.DOMException; + return isDOMExceptionConstructor(ctor) ? ctor : undefined; +} +/** + * Support: + * - All platforms + */ +function createPolyfill() { + // eslint-disable-next-line @typescript-eslint/no-shadow + var ctor = function DOMException(message, name) { + this.message = message || ''; + this.name = name || 'Error'; + if (Error.captureStackTrace) { + Error.captureStackTrace(this, this.constructor); + } + }; + setFunctionName(ctor, 'DOMException'); + ctor.prototype = Object.create(Error.prototype); + Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true }); + return ctor; +} +// eslint-disable-next-line @typescript-eslint/no-redeclare +var DOMException = getFromGlobal() || createPolyfill(); + +function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) { + var reader = AcquireReadableStreamDefaultReader(source); + var writer = AcquireWritableStreamDefaultWriter(dest); + source._disturbed = true; + var shuttingDown = false; + // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown. + var currentWrite = promiseResolvedWith(undefined); + return newPromise(function (resolve, reject) { + var abortAlgorithm; + if (signal !== undefined) { + abortAlgorithm = function () { + var error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError'); + var actions = []; + if (!preventAbort) { + actions.push(function () { + if (dest._state === 'writable') { + return WritableStreamAbort(dest, error); + } + return promiseResolvedWith(undefined); + }); + } + if (!preventCancel) { + actions.push(function () { + if (source._state === 'readable') { + return ReadableStreamCancel(source, error); + } + return promiseResolvedWith(undefined); + }); + } + shutdownWithAction(function () { return Promise.all(actions.map(function (action) { return action(); })); }, true, error); + }; + if (signal.aborted) { + abortAlgorithm(); + return; + } + signal.addEventListener('abort', abortAlgorithm); + } + // Using reader and writer, read all chunks from this and write them to dest + // - Backpressure must be enforced + // - Shutdown must stop all activity + function pipeLoop() { + return newPromise(function (resolveLoop, rejectLoop) { + function next(done) { + if (done) { + resolveLoop(); + } + else { + // Use `PerformPromiseThen` instead of `uponPromise` to avoid + // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers + PerformPromiseThen(pipeStep(), next, rejectLoop); + } + } + next(false); + }); + } + function pipeStep() { + if (shuttingDown) { + return promiseResolvedWith(true); + } + return PerformPromiseThen(writer._readyPromise, function () { + return newPromise(function (resolveRead, rejectRead) { + ReadableStreamDefaultReaderRead(reader, { + _chunkSteps: function (chunk) { + currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop); + resolveRead(false); + }, + _closeSteps: function () { return resolveRead(true); }, + _errorSteps: rejectRead + }); + }); + }); + } + // Errors must be propagated forward + isOrBecomesErrored(source, reader._closedPromise, function (storedError) { + if (!preventAbort) { + shutdownWithAction(function () { return WritableStreamAbort(dest, storedError); }, true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Errors must be propagated backward + isOrBecomesErrored(dest, writer._closedPromise, function (storedError) { + if (!preventCancel) { + shutdownWithAction(function () { return ReadableStreamCancel(source, storedError); }, true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Closing must be propagated forward + isOrBecomesClosed(source, reader._closedPromise, function () { + if (!preventClose) { + shutdownWithAction(function () { return WritableStreamDefaultWriterCloseWithErrorPropagation(writer); }); + } + else { + shutdown(); + } + return null; + }); + // Closing must be propagated backward + if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') { + var destClosed_1 = new TypeError('the destination writable stream closed before all data could be piped to it'); + if (!preventCancel) { + shutdownWithAction(function () { return ReadableStreamCancel(source, destClosed_1); }, true, destClosed_1); + } + else { + shutdown(true, destClosed_1); + } + } + setPromiseIsHandledToTrue(pipeLoop()); + function waitForWritesToFinish() { + // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait + // for that too. + var oldCurrentWrite = currentWrite; + return PerformPromiseThen(currentWrite, function () { return oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined; }); + } + function isOrBecomesErrored(stream, promise, action) { + if (stream._state === 'errored') { + action(stream._storedError); + } + else { + uponRejection(promise, action); + } + } + function isOrBecomesClosed(stream, promise, action) { + if (stream._state === 'closed') { + action(); + } + else { + uponFulfillment(promise, action); + } + } + function shutdownWithAction(action, originalIsError, originalError) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), doTheRest); + } + else { + doTheRest(); + } + function doTheRest() { + uponPromise(action(), function () { return finalize(originalIsError, originalError); }, function (newError) { return finalize(true, newError); }); + return null; + } + } + function shutdown(isError, error) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), function () { return finalize(isError, error); }); + } + else { + finalize(isError, error); + } + } + function finalize(isError, error) { + WritableStreamDefaultWriterRelease(writer); + ReadableStreamReaderGenericRelease(reader); + if (signal !== undefined) { + signal.removeEventListener('abort', abortAlgorithm); + } + if (isError) { + reject(error); + } + else { + resolve(undefined); + } + return null; + } + }); +} + +/** + * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue. + * + * @public + */ +var ReadableStreamDefaultController = /** @class */ (function () { + function ReadableStreamDefaultController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(ReadableStreamDefaultController.prototype, "desiredSize", { + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying source ought to use this information to determine when and how to apply backpressure. + */ + get: function () { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('desiredSize'); + } + return ReadableStreamDefaultControllerGetDesiredSize(this); + }, + enumerable: false, + configurable: true + }); + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + ReadableStreamDefaultController.prototype.close = function () { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('close'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits close'); + } + ReadableStreamDefaultControllerClose(this); + }; + ReadableStreamDefaultController.prototype.enqueue = function (chunk) { + if (chunk === void 0) { chunk = undefined; } + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('enqueue'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits enqueue'); + } + return ReadableStreamDefaultControllerEnqueue(this, chunk); + }; + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + ReadableStreamDefaultController.prototype.error = function (e) { + if (e === void 0) { e = undefined; } + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('error'); + } + ReadableStreamDefaultControllerError(this, e); + }; + /** @internal */ + ReadableStreamDefaultController.prototype[CancelSteps] = function (reason) { + ResetQueue(this); + var result = this._cancelAlgorithm(reason); + ReadableStreamDefaultControllerClearAlgorithms(this); + return result; + }; + /** @internal */ + ReadableStreamDefaultController.prototype[PullSteps] = function (readRequest) { + var stream = this._controlledReadableStream; + if (this._queue.length > 0) { + var chunk = DequeueValue(this); + if (this._closeRequested && this._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(this); + ReadableStreamClose(stream); + } + else { + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + readRequest._chunkSteps(chunk); + } + else { + ReadableStreamAddReadRequest(stream, readRequest); + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + }; + /** @internal */ + ReadableStreamDefaultController.prototype[ReleaseSteps] = function () { + // Do nothing. + }; + return ReadableStreamDefaultController; +}()); +Object.defineProperties(ReadableStreamDefaultController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(ReadableStreamDefaultController.prototype.close, 'close'); +setFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue'); +setFunctionName(ReadableStreamDefaultController.prototype.error, 'error'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultController.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamDefaultController', + configurable: true + }); +} +// Abstract operations for the ReadableStreamDefaultController. +function IsReadableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) { + return false; + } + return x instanceof ReadableStreamDefaultController; +} +function ReadableStreamDefaultControllerCallPullIfNeeded(controller) { + var shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + var pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, function () { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + return null; + }, function (e) { + ReadableStreamDefaultControllerError(controller, e); + return null; + }); +} +function ReadableStreamDefaultControllerShouldCallPull(controller) { + var stream = controller._controlledReadableStream; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return false; + } + if (!controller._started) { + return false; + } + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + var desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; +} +function ReadableStreamDefaultControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; +} +// A client of ReadableStreamDefaultController may use these functions directly to bypass state check. +function ReadableStreamDefaultControllerClose(controller) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + var stream = controller._controlledReadableStream; + controller._closeRequested = true; + if (controller._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } +} +function ReadableStreamDefaultControllerEnqueue(controller, chunk) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + var stream = controller._controlledReadableStream; + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + ReadableStreamFulfillReadRequest(stream, chunk, false); + } + else { + var chunkSize = void 0; + try { + chunkSize = controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + ReadableStreamDefaultControllerError(controller, chunkSizeE); + throw chunkSizeE; + } + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + ReadableStreamDefaultControllerError(controller, enqueueE); + throw enqueueE; + } + } + ReadableStreamDefaultControllerCallPullIfNeeded(controller); +} +function ReadableStreamDefaultControllerError(controller, e) { + var stream = controller._controlledReadableStream; + if (stream._state !== 'readable') { + return; + } + ResetQueue(controller); + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); +} +function ReadableStreamDefaultControllerGetDesiredSize(controller) { + var state = controller._controlledReadableStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; +} +// This is used in the implementation of TransformStream. +function ReadableStreamDefaultControllerHasBackpressure(controller) { + if (ReadableStreamDefaultControllerShouldCallPull(controller)) { + return false; + } + return true; +} +function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) { + var state = controller._controlledReadableStream._state; + if (!controller._closeRequested && state === 'readable') { + return true; + } + return false; +} +function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledReadableStream = stream; + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._started = false; + controller._closeRequested = false; + controller._pullAgain = false; + controller._pulling = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + stream._readableStreamController = controller; + var startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), function () { + controller._started = true; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + return null; + }, function (r) { + ReadableStreamDefaultControllerError(controller, r); + return null; + }); +} +function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) { + var controller = Object.create(ReadableStreamDefaultController.prototype); + var startAlgorithm; + var pullAlgorithm; + var cancelAlgorithm; + if (underlyingSource.start !== undefined) { + startAlgorithm = function () { return underlyingSource.start(controller); }; + } + else { + startAlgorithm = function () { return undefined; }; + } + if (underlyingSource.pull !== undefined) { + pullAlgorithm = function () { return underlyingSource.pull(controller); }; + } + else { + pullAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingSource.cancel !== undefined) { + cancelAlgorithm = function (reason) { return underlyingSource.cancel(reason); }; + } + else { + cancelAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); +} +// Helper functions for the ReadableStreamDefaultController. +function defaultControllerBrandCheckException$1(name) { + return new TypeError("ReadableStreamDefaultController.prototype.".concat(name, " can only be used on a ReadableStreamDefaultController")); +} + +function ReadableStreamTee(stream, cloneForBranch2) { + if (IsReadableByteStreamController(stream._readableStreamController)) { + return ReadableByteStreamTee(stream); + } + return ReadableStreamDefaultTee(stream); +} +function ReadableStreamDefaultTee(stream, cloneForBranch2) { + var reader = AcquireReadableStreamDefaultReader(stream); + var reading = false; + var readAgain = false; + var canceled1 = false; + var canceled2 = false; + var reason1; + var reason2; + var branch1; + var branch2; + var resolveCancelPromise; + var cancelPromise = newPromise(function (resolve) { + resolveCancelPromise = resolve; + }); + function pullAlgorithm() { + if (reading) { + readAgain = true; + return promiseResolvedWith(undefined); + } + reading = true; + var readRequest = { + _chunkSteps: function (chunk) { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(function () { + readAgain = false; + var chunk1 = chunk; + var chunk2 = chunk; + // There is no way to access the cloning code right now in the reference implementation. + // If we add one then we'll need an implementation for serializable objects. + // if (!canceled2 && cloneForBranch2) { + // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2)); + // } + if (!canceled1) { + ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgain) { + pullAlgorithm(); + } + }); + }, + _closeSteps: function () { + reading = false; + if (!canceled1) { + ReadableStreamDefaultControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableStreamDefaultControllerClose(branch2._readableStreamController); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: function () { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + // do nothing + } + branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm); + branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm); + uponRejection(reader._closedPromise, function (r) { + ReadableStreamDefaultControllerError(branch1._readableStreamController, r); + ReadableStreamDefaultControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + return [branch1, branch2]; +} +function ReadableByteStreamTee(stream) { + var reader = AcquireReadableStreamDefaultReader(stream); + var reading = false; + var readAgainForBranch1 = false; + var readAgainForBranch2 = false; + var canceled1 = false; + var canceled2 = false; + var reason1; + var reason2; + var branch1; + var branch2; + var resolveCancelPromise; + var cancelPromise = newPromise(function (resolve) { + resolveCancelPromise = resolve; + }); + function forwardReaderError(thisReader) { + uponRejection(thisReader._closedPromise, function (r) { + if (thisReader !== reader) { + return null; + } + ReadableByteStreamControllerError(branch1._readableStreamController, r); + ReadableByteStreamControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + } + function pullWithDefaultReader() { + if (IsReadableStreamBYOBReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamDefaultReader(stream); + forwardReaderError(reader); + } + var readRequest = { + _chunkSteps: function (chunk) { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(function () { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + var chunk1 = chunk; + var chunk2 = chunk; + if (!canceled1 && !canceled2) { + try { + chunk2 = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(branch1._readableStreamController, cloneE); + ReadableByteStreamControllerError(branch2._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + } + if (!canceled1) { + ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: function () { + reading = false; + if (!canceled1) { + ReadableByteStreamControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableByteStreamControllerClose(branch2._readableStreamController); + } + if (branch1._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch1._readableStreamController, 0); + } + if (branch2._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch2._readableStreamController, 0); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: function () { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + } + function pullWithBYOBReader(view, forBranch2) { + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamBYOBReader(stream); + forwardReaderError(reader); + } + var byobBranch = forBranch2 ? branch2 : branch1; + var otherBranch = forBranch2 ? branch1 : branch2; + var readIntoRequest = { + _chunkSteps: function (chunk) { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(function () { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + var byobCanceled = forBranch2 ? canceled2 : canceled1; + var otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!otherCanceled) { + var clonedChunk = void 0; + try { + clonedChunk = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE); + ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk); + } + else if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: function (chunk) { + reading = false; + var byobCanceled = forBranch2 ? canceled2 : canceled1; + var otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!byobCanceled) { + ReadableByteStreamControllerClose(byobBranch._readableStreamController); + } + if (!otherCanceled) { + ReadableByteStreamControllerClose(otherBranch._readableStreamController); + } + if (chunk !== undefined) { + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0); + } + } + if (!byobCanceled || !otherCanceled) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: function () { + reading = false; + } + }; + ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest); + } + function pull1Algorithm() { + if (reading) { + readAgainForBranch1 = true; + return promiseResolvedWith(undefined); + } + reading = true; + var byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, false); + } + return promiseResolvedWith(undefined); + } + function pull2Algorithm() { + if (reading) { + readAgainForBranch2 = true; + return promiseResolvedWith(undefined); + } + reading = true; + var byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, true); + } + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + return; + } + branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm); + branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm); + forwardReaderError(reader); + return [branch1, branch2]; +} + +function isReadableStreamLike(stream) { + return typeIsObject(stream) && typeof stream.getReader !== 'undefined'; +} + +function ReadableStreamFrom(source) { + if (isReadableStreamLike(source)) { + return ReadableStreamFromDefaultReader(source.getReader()); + } + return ReadableStreamFromIterable(source); +} +function ReadableStreamFromIterable(asyncIterable) { + var stream; + var iteratorRecord = GetIterator(asyncIterable, 'async'); + var startAlgorithm = noop; + function pullAlgorithm() { + var nextResult; + try { + nextResult = IteratorNext(iteratorRecord); + } + catch (e) { + return promiseRejectedWith(e); + } + var nextPromise = promiseResolvedWith(nextResult); + return transformPromiseWith(nextPromise, function (iterResult) { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object'); + } + var done = IteratorComplete(iterResult); + if (done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + var value = IteratorValue(iterResult); + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + var iterator = iteratorRecord.iterator; + var returnMethod; + try { + returnMethod = GetMethod(iterator, 'return'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (returnMethod === undefined) { + return promiseResolvedWith(undefined); + } + var returnResult; + try { + returnResult = reflectCall(returnMethod, iterator, [reason]); + } + catch (e) { + return promiseRejectedWith(e); + } + var returnPromise = promiseResolvedWith(returnResult); + return transformPromiseWith(returnPromise, function (iterResult) { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object'); + } + return undefined; + }); + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; +} +function ReadableStreamFromDefaultReader(reader) { + var stream; + var startAlgorithm = noop; + function pullAlgorithm() { + var readPromise; + try { + readPromise = reader.read(); + } + catch (e) { + return promiseRejectedWith(e); + } + return transformPromiseWith(readPromise, function (readResult) { + if (!typeIsObject(readResult)) { + throw new TypeError('The promise returned by the reader.read() method must fulfill with an object'); + } + if (readResult.done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + var value = readResult.value; + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + try { + return promiseResolvedWith(reader.cancel(reason)); + } + catch (e) { + return promiseRejectedWith(e); + } + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; +} + +function convertUnderlyingDefaultOrByteSource(source, context) { + assertDictionary(source, context); + var original = source; + var autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize; + var cancel = original === null || original === void 0 ? void 0 : original.cancel; + var pull = original === null || original === void 0 ? void 0 : original.pull; + var start = original === null || original === void 0 ? void 0 : original.start; + var type = original === null || original === void 0 ? void 0 : original.type; + return { + autoAllocateChunkSize: autoAllocateChunkSize === undefined ? + undefined : + convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, "".concat(context, " has member 'autoAllocateChunkSize' that")), + cancel: cancel === undefined ? + undefined : + convertUnderlyingSourceCancelCallback(cancel, original, "".concat(context, " has member 'cancel' that")), + pull: pull === undefined ? + undefined : + convertUnderlyingSourcePullCallback(pull, original, "".concat(context, " has member 'pull' that")), + start: start === undefined ? + undefined : + convertUnderlyingSourceStartCallback(start, original, "".concat(context, " has member 'start' that")), + type: type === undefined ? undefined : convertReadableStreamType(type, "".concat(context, " has member 'type' that")) + }; +} +function convertUnderlyingSourceCancelCallback(fn, original, context) { + assertFunction(fn, context); + return function (reason) { return promiseCall(fn, original, [reason]); }; +} +function convertUnderlyingSourcePullCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return promiseCall(fn, original, [controller]); }; +} +function convertUnderlyingSourceStartCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return reflectCall(fn, original, [controller]); }; +} +function convertReadableStreamType(type, context) { + type = "".concat(type); + if (type !== 'bytes') { + throw new TypeError("".concat(context, " '").concat(type, "' is not a valid enumeration value for ReadableStreamType")); + } + return type; +} + +function convertIteratorOptions(options, context) { + assertDictionary(options, context); + var preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + return { preventCancel: Boolean(preventCancel) }; +} + +function convertPipeOptions(options, context) { + assertDictionary(options, context); + var preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort; + var preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + var preventClose = options === null || options === void 0 ? void 0 : options.preventClose; + var signal = options === null || options === void 0 ? void 0 : options.signal; + if (signal !== undefined) { + assertAbortSignal(signal, "".concat(context, " has member 'signal' that")); + } + return { + preventAbort: Boolean(preventAbort), + preventCancel: Boolean(preventCancel), + preventClose: Boolean(preventClose), + signal: signal + }; +} +function assertAbortSignal(signal, context) { + if (!isAbortSignal(signal)) { + throw new TypeError("".concat(context, " is not an AbortSignal.")); + } +} + +function convertReadableWritablePair(pair, context) { + assertDictionary(pair, context); + var readable = pair === null || pair === void 0 ? void 0 : pair.readable; + assertRequiredField(readable, 'readable', 'ReadableWritablePair'); + assertReadableStream(readable, "".concat(context, " has member 'readable' that")); + var writable = pair === null || pair === void 0 ? void 0 : pair.writable; + assertRequiredField(writable, 'writable', 'ReadableWritablePair'); + assertWritableStream(writable, "".concat(context, " has member 'writable' that")); + return { readable: readable, writable: writable }; +} + +/** + * A readable stream represents a source of data, from which you can read. + * + * @public + */ +var ReadableStream = /** @class */ (function () { + function ReadableStream(rawUnderlyingSource, rawStrategy) { + if (rawUnderlyingSource === void 0) { rawUnderlyingSource = {}; } + if (rawStrategy === void 0) { rawStrategy = {}; } + if (rawUnderlyingSource === undefined) { + rawUnderlyingSource = null; + } + else { + assertObject(rawUnderlyingSource, 'First parameter'); + } + var strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + var underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter'); + InitializeReadableStream(this); + if (underlyingSource.type === 'bytes') { + if (strategy.size !== undefined) { + throw new RangeError('The strategy for a byte stream cannot have a size function'); + } + var highWaterMark = ExtractHighWaterMark(strategy, 0); + SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark); + } + else { + var sizeAlgorithm = ExtractSizeAlgorithm(strategy); + var highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm); + } + } + Object.defineProperty(ReadableStream.prototype, "locked", { + /** + * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}. + */ + get: function () { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('locked'); + } + return IsReadableStreamLocked(this); + }, + enumerable: false, + configurable: true + }); + /** + * Cancels the stream, signaling a loss of interest in the stream by a consumer. + * + * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()} + * method, which might or might not use it. + */ + ReadableStream.prototype.cancel = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('cancel')); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader')); + } + return ReadableStreamCancel(this, reason); + }; + ReadableStream.prototype.getReader = function (rawOptions) { + if (rawOptions === void 0) { rawOptions = undefined; } + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('getReader'); + } + var options = convertReaderOptions(rawOptions, 'First parameter'); + if (options.mode === undefined) { + return AcquireReadableStreamDefaultReader(this); + } + return AcquireReadableStreamBYOBReader(this); + }; + ReadableStream.prototype.pipeThrough = function (rawTransform, rawOptions) { + if (rawOptions === void 0) { rawOptions = {}; } + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('pipeThrough'); + } + assertRequiredArgument(rawTransform, 1, 'pipeThrough'); + var transform = convertReadableWritablePair(rawTransform, 'First parameter'); + var options = convertPipeOptions(rawOptions, 'Second parameter'); + if (IsReadableStreamLocked(this)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream'); + } + if (IsWritableStreamLocked(transform.writable)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream'); + } + var promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + setPromiseIsHandledToTrue(promise); + return transform.readable; + }; + ReadableStream.prototype.pipeTo = function (destination, rawOptions) { + if (rawOptions === void 0) { rawOptions = {}; } + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('pipeTo')); + } + if (destination === undefined) { + return promiseRejectedWith("Parameter 1 is required in 'pipeTo'."); + } + if (!IsWritableStream(destination)) { + return promiseRejectedWith(new TypeError("ReadableStream.prototype.pipeTo's first argument must be a WritableStream")); + } + var options; + try { + options = convertPipeOptions(rawOptions, 'Second parameter'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')); + } + if (IsWritableStreamLocked(destination)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')); + } + return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + }; + /** + * Tees this readable stream, returning a two-element array containing the two resulting branches as + * new {@link ReadableStream} instances. + * + * Teeing a stream will lock it, preventing any other consumer from acquiring a reader. + * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be + * propagated to the stream's underlying source. + * + * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable, + * this could allow interference between the two branches. + */ + ReadableStream.prototype.tee = function () { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('tee'); + } + var branches = ReadableStreamTee(this); + return CreateArrayFromList(branches); + }; + ReadableStream.prototype.values = function (rawOptions) { + if (rawOptions === void 0) { rawOptions = undefined; } + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('values'); + } + var options = convertIteratorOptions(rawOptions, 'First parameter'); + return AcquireReadableStreamAsyncIterator(this, options.preventCancel); + }; + ReadableStream.prototype[SymbolAsyncIterator] = function (options) { + // Stub implementation, overridden below + return this.values(options); + }; + /** + * Creates a new ReadableStream wrapping the provided iterable or async iterable. + * + * This can be used to adapt various kinds of objects into a readable stream, + * such as an array, an async generator, or a Node.js readable stream. + */ + ReadableStream.from = function (asyncIterable) { + return ReadableStreamFrom(asyncIterable); + }; + return ReadableStream; +}()); +Object.defineProperties(ReadableStream, { + from: { enumerable: true } +}); +Object.defineProperties(ReadableStream.prototype, { + cancel: { enumerable: true }, + getReader: { enumerable: true }, + pipeThrough: { enumerable: true }, + pipeTo: { enumerable: true }, + tee: { enumerable: true }, + values: { enumerable: true }, + locked: { enumerable: true } +}); +setFunctionName(ReadableStream.from, 'from'); +setFunctionName(ReadableStream.prototype.cancel, 'cancel'); +setFunctionName(ReadableStream.prototype.getReader, 'getReader'); +setFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough'); +setFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo'); +setFunctionName(ReadableStream.prototype.tee, 'tee'); +setFunctionName(ReadableStream.prototype.values, 'values'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStream.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStream', + configurable: true + }); +} +Object.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, { + value: ReadableStream.prototype.values, + writable: true, + configurable: true +}); +// Abstract operations for the ReadableStream. +// Throws if and only if startAlgorithm throws. +function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + if (highWaterMark === void 0) { highWaterMark = 1; } + if (sizeAlgorithm === void 0) { sizeAlgorithm = function () { return 1; }; } + var stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + var controller = Object.create(ReadableStreamDefaultController.prototype); + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + return stream; +} +// Throws if and only if startAlgorithm throws. +function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) { + var stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + var controller = Object.create(ReadableByteStreamController.prototype); + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined); + return stream; +} +function InitializeReadableStream(stream) { + stream._state = 'readable'; + stream._reader = undefined; + stream._storedError = undefined; + stream._disturbed = false; +} +function IsReadableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) { + return false; + } + return x instanceof ReadableStream; +} +function IsReadableStreamLocked(stream) { + if (stream._reader === undefined) { + return false; + } + return true; +} +// ReadableStream API exposed for controllers. +function ReadableStreamCancel(stream, reason) { + stream._disturbed = true; + if (stream._state === 'closed') { + return promiseResolvedWith(undefined); + } + if (stream._state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + ReadableStreamClose(stream); + var reader = stream._reader; + if (reader !== undefined && IsReadableStreamBYOBReader(reader)) { + var readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(function (readIntoRequest) { + readIntoRequest._closeSteps(undefined); + }); + } + var sourceCancelPromise = stream._readableStreamController[CancelSteps](reason); + return transformPromiseWith(sourceCancelPromise, noop); +} +function ReadableStreamClose(stream) { + stream._state = 'closed'; + var reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseResolve(reader); + if (IsReadableStreamDefaultReader(reader)) { + var readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(function (readRequest) { + readRequest._closeSteps(); + }); + } +} +function ReadableStreamError(stream, e) { + stream._state = 'errored'; + stream._storedError = e; + var reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseReject(reader, e); + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + else { + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } +} +// Helper functions for the ReadableStream. +function streamBrandCheckException$1(name) { + return new TypeError("ReadableStream.prototype.".concat(name, " can only be used on a ReadableStream")); +} + +function convertQueuingStrategyInit(init, context) { + assertDictionary(init, context); + var highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit'); + return { + highWaterMark: convertUnrestrictedDouble(highWaterMark) + }; +} + +// The size function must not have a prototype property nor be a constructor +var byteLengthSizeFunction = function (chunk) { + return chunk.byteLength; +}; +setFunctionName(byteLengthSizeFunction, 'size'); +/** + * A queuing strategy that counts the number of bytes in each chunk. + * + * @public + */ +var ByteLengthQueuingStrategy = /** @class */ (function () { + function ByteLengthQueuingStrategy(options) { + assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark; + } + Object.defineProperty(ByteLengthQueuingStrategy.prototype, "highWaterMark", { + /** + * Returns the high water mark provided to the constructor. + */ + get: function () { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('highWaterMark'); + } + return this._byteLengthQueuingStrategyHighWaterMark; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(ByteLengthQueuingStrategy.prototype, "size", { + /** + * Measures the size of `chunk` by returning the value of its `byteLength` property. + */ + get: function () { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('size'); + } + return byteLengthSizeFunction; + }, + enumerable: false, + configurable: true + }); + return ByteLengthQueuingStrategy; +}()); +Object.defineProperties(ByteLengthQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } +}); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ByteLengthQueuingStrategy.prototype, SymbolPolyfill.toStringTag, { + value: 'ByteLengthQueuingStrategy', + configurable: true + }); +} +// Helper functions for the ByteLengthQueuingStrategy. +function byteLengthBrandCheckException(name) { + return new TypeError("ByteLengthQueuingStrategy.prototype.".concat(name, " can only be used on a ByteLengthQueuingStrategy")); +} +function IsByteLengthQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof ByteLengthQueuingStrategy; +} + +// The size function must not have a prototype property nor be a constructor +var countSizeFunction = function () { + return 1; +}; +setFunctionName(countSizeFunction, 'size'); +/** + * A queuing strategy that counts the number of chunks. + * + * @public + */ +var CountQueuingStrategy = /** @class */ (function () { + function CountQueuingStrategy(options) { + assertRequiredArgument(options, 1, 'CountQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._countQueuingStrategyHighWaterMark = options.highWaterMark; + } + Object.defineProperty(CountQueuingStrategy.prototype, "highWaterMark", { + /** + * Returns the high water mark provided to the constructor. + */ + get: function () { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('highWaterMark'); + } + return this._countQueuingStrategyHighWaterMark; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(CountQueuingStrategy.prototype, "size", { + /** + * Measures the size of `chunk` by always returning 1. + * This ensures that the total queue size is a count of the number of chunks in the queue. + */ + get: function () { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('size'); + } + return countSizeFunction; + }, + enumerable: false, + configurable: true + }); + return CountQueuingStrategy; +}()); +Object.defineProperties(CountQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } +}); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(CountQueuingStrategy.prototype, SymbolPolyfill.toStringTag, { + value: 'CountQueuingStrategy', + configurable: true + }); +} +// Helper functions for the CountQueuingStrategy. +function countBrandCheckException(name) { + return new TypeError("CountQueuingStrategy.prototype.".concat(name, " can only be used on a CountQueuingStrategy")); +} +function IsCountQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof CountQueuingStrategy; +} + +function convertTransformer(original, context) { + assertDictionary(original, context); + var cancel = original === null || original === void 0 ? void 0 : original.cancel; + var flush = original === null || original === void 0 ? void 0 : original.flush; + var readableType = original === null || original === void 0 ? void 0 : original.readableType; + var start = original === null || original === void 0 ? void 0 : original.start; + var transform = original === null || original === void 0 ? void 0 : original.transform; + var writableType = original === null || original === void 0 ? void 0 : original.writableType; + return { + cancel: cancel === undefined ? + undefined : + convertTransformerCancelCallback(cancel, original, "".concat(context, " has member 'cancel' that")), + flush: flush === undefined ? + undefined : + convertTransformerFlushCallback(flush, original, "".concat(context, " has member 'flush' that")), + readableType: readableType, + start: start === undefined ? + undefined : + convertTransformerStartCallback(start, original, "".concat(context, " has member 'start' that")), + transform: transform === undefined ? + undefined : + convertTransformerTransformCallback(transform, original, "".concat(context, " has member 'transform' that")), + writableType: writableType + }; +} +function convertTransformerFlushCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return promiseCall(fn, original, [controller]); }; +} +function convertTransformerStartCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return reflectCall(fn, original, [controller]); }; +} +function convertTransformerTransformCallback(fn, original, context) { + assertFunction(fn, context); + return function (chunk, controller) { return promiseCall(fn, original, [chunk, controller]); }; +} +function convertTransformerCancelCallback(fn, original, context) { + assertFunction(fn, context); + return function (reason) { return promiseCall(fn, original, [reason]); }; +} + +// Class TransformStream +/** + * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream}, + * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side. + * In a manner specific to the transform stream in question, writes to the writable side result in new data being + * made available for reading from the readable side. + * + * @public + */ +var TransformStream = /** @class */ (function () { + function TransformStream(rawTransformer, rawWritableStrategy, rawReadableStrategy) { + if (rawTransformer === void 0) { rawTransformer = {}; } + if (rawWritableStrategy === void 0) { rawWritableStrategy = {}; } + if (rawReadableStrategy === void 0) { rawReadableStrategy = {}; } + if (rawTransformer === undefined) { + rawTransformer = null; + } + var writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter'); + var readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter'); + var transformer = convertTransformer(rawTransformer, 'First parameter'); + if (transformer.readableType !== undefined) { + throw new RangeError('Invalid readableType specified'); + } + if (transformer.writableType !== undefined) { + throw new RangeError('Invalid writableType specified'); + } + var readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0); + var readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy); + var writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1); + var writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy); + var startPromise_resolve; + var startPromise = newPromise(function (resolve) { + startPromise_resolve = resolve; + }); + InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + SetUpTransformStreamDefaultControllerFromTransformer(this, transformer); + if (transformer.start !== undefined) { + startPromise_resolve(transformer.start(this._transformStreamController)); + } + else { + startPromise_resolve(undefined); + } + } + Object.defineProperty(TransformStream.prototype, "readable", { + /** + * The readable side of the transform stream. + */ + get: function () { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('readable'); + } + return this._readable; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(TransformStream.prototype, "writable", { + /** + * The writable side of the transform stream. + */ + get: function () { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('writable'); + } + return this._writable; + }, + enumerable: false, + configurable: true + }); + return TransformStream; +}()); +Object.defineProperties(TransformStream.prototype, { + readable: { enumerable: true }, + writable: { enumerable: true } +}); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(TransformStream.prototype, SymbolPolyfill.toStringTag, { + value: 'TransformStream', + configurable: true + }); +} +function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) { + function startAlgorithm() { + return startPromise; + } + function writeAlgorithm(chunk) { + return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk); + } + function abortAlgorithm(reason) { + return TransformStreamDefaultSinkAbortAlgorithm(stream, reason); + } + function closeAlgorithm() { + return TransformStreamDefaultSinkCloseAlgorithm(stream); + } + stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm); + function pullAlgorithm() { + return TransformStreamDefaultSourcePullAlgorithm(stream); + } + function cancelAlgorithm(reason) { + return TransformStreamDefaultSourceCancelAlgorithm(stream, reason); + } + stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure. + stream._backpressure = undefined; + stream._backpressureChangePromise = undefined; + stream._backpressureChangePromise_resolve = undefined; + TransformStreamSetBackpressure(stream, true); + stream._transformStreamController = undefined; +} +function IsTransformStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) { + return false; + } + return x instanceof TransformStream; +} +// This is a no-op if both sides are already errored. +function TransformStreamError(stream, e) { + ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e); + TransformStreamErrorWritableAndUnblockWrite(stream, e); +} +function TransformStreamErrorWritableAndUnblockWrite(stream, e) { + TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController); + WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e); + TransformStreamUnblockWrite(stream); +} +function TransformStreamUnblockWrite(stream) { + if (stream._backpressure) { + // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure() + // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time + // _backpressure is set. + TransformStreamSetBackpressure(stream, false); + } +} +function TransformStreamSetBackpressure(stream, backpressure) { + // Passes also when called during construction. + if (stream._backpressureChangePromise !== undefined) { + stream._backpressureChangePromise_resolve(); + } + stream._backpressureChangePromise = newPromise(function (resolve) { + stream._backpressureChangePromise_resolve = resolve; + }); + stream._backpressure = backpressure; +} +// Class TransformStreamDefaultController +/** + * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}. + * + * @public + */ +var TransformStreamDefaultController = /** @class */ (function () { + function TransformStreamDefaultController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(TransformStreamDefaultController.prototype, "desiredSize", { + /** + * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full. + */ + get: function () { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('desiredSize'); + } + var readableController = this._controlledTransformStream._readable._readableStreamController; + return ReadableStreamDefaultControllerGetDesiredSize(readableController); + }, + enumerable: false, + configurable: true + }); + TransformStreamDefaultController.prototype.enqueue = function (chunk) { + if (chunk === void 0) { chunk = undefined; } + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('enqueue'); + } + TransformStreamDefaultControllerEnqueue(this, chunk); + }; + /** + * Errors both the readable side and the writable side of the controlled transform stream, making all future + * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded. + */ + TransformStreamDefaultController.prototype.error = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('error'); + } + TransformStreamDefaultControllerError(this, reason); + }; + /** + * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the + * transformer only needs to consume a portion of the chunks written to the writable side. + */ + TransformStreamDefaultController.prototype.terminate = function () { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('terminate'); + } + TransformStreamDefaultControllerTerminate(this); + }; + return TransformStreamDefaultController; +}()); +Object.defineProperties(TransformStreamDefaultController.prototype, { + enqueue: { enumerable: true }, + error: { enumerable: true }, + terminate: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue'); +setFunctionName(TransformStreamDefaultController.prototype.error, 'error'); +setFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(TransformStreamDefaultController.prototype, SymbolPolyfill.toStringTag, { + value: 'TransformStreamDefaultController', + configurable: true + }); +} +// Transform Stream Default Controller Abstract Operations +function IsTransformStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) { + return false; + } + return x instanceof TransformStreamDefaultController; +} +function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm) { + controller._controlledTransformStream = stream; + stream._transformStreamController = controller; + controller._transformAlgorithm = transformAlgorithm; + controller._flushAlgorithm = flushAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._finishPromise = undefined; + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) { + var controller = Object.create(TransformStreamDefaultController.prototype); + var transformAlgorithm; + var flushAlgorithm; + var cancelAlgorithm; + if (transformer.transform !== undefined) { + transformAlgorithm = function (chunk) { return transformer.transform(chunk, controller); }; + } + else { + transformAlgorithm = function (chunk) { + try { + TransformStreamDefaultControllerEnqueue(controller, chunk); + return promiseResolvedWith(undefined); + } + catch (transformResultE) { + return promiseRejectedWith(transformResultE); + } + }; + } + if (transformer.flush !== undefined) { + flushAlgorithm = function () { return transformer.flush(controller); }; + } + else { + flushAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (transformer.cancel !== undefined) { + cancelAlgorithm = function (reason) { return transformer.cancel(reason); }; + } + else { + cancelAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm); +} +function TransformStreamDefaultControllerClearAlgorithms(controller) { + controller._transformAlgorithm = undefined; + controller._flushAlgorithm = undefined; + controller._cancelAlgorithm = undefined; +} +function TransformStreamDefaultControllerEnqueue(controller, chunk) { + var stream = controller._controlledTransformStream; + var readableController = stream._readable._readableStreamController; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) { + throw new TypeError('Readable side is not in a state that permits enqueue'); + } + // We throttle transform invocations based on the backpressure of the ReadableStream, but we still + // accept TransformStreamDefaultControllerEnqueue() calls. + try { + ReadableStreamDefaultControllerEnqueue(readableController, chunk); + } + catch (e) { + // This happens when readableStrategy.size() throws. + TransformStreamErrorWritableAndUnblockWrite(stream, e); + throw stream._readable._storedError; + } + var backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController); + if (backpressure !== stream._backpressure) { + TransformStreamSetBackpressure(stream, true); + } +} +function TransformStreamDefaultControllerError(controller, e) { + TransformStreamError(controller._controlledTransformStream, e); +} +function TransformStreamDefaultControllerPerformTransform(controller, chunk) { + var transformPromise = controller._transformAlgorithm(chunk); + return transformPromiseWith(transformPromise, undefined, function (r) { + TransformStreamError(controller._controlledTransformStream, r); + throw r; + }); +} +function TransformStreamDefaultControllerTerminate(controller) { + var stream = controller._controlledTransformStream; + var readableController = stream._readable._readableStreamController; + ReadableStreamDefaultControllerClose(readableController); + var error = new TypeError('TransformStream terminated'); + TransformStreamErrorWritableAndUnblockWrite(stream, error); +} +// TransformStreamDefaultSink Algorithms +function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) { + var controller = stream._transformStreamController; + if (stream._backpressure) { + var backpressureChangePromise = stream._backpressureChangePromise; + return transformPromiseWith(backpressureChangePromise, function () { + var writable = stream._writable; + var state = writable._state; + if (state === 'erroring') { + throw writable._storedError; + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + }); + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); +} +function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) { + var controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + var readable = stream._readable; + // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally, + // we don't run the _cancelAlgorithm again. + controller._finishPromise = newPromise(function (resolve, reject) { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + var cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, function () { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerError(readable._readableStreamController, reason); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, function (r) { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +function TransformStreamDefaultSinkCloseAlgorithm(stream) { + var controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + var readable = stream._readable; + // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally, + // we don't also run the _cancelAlgorithm. + controller._finishPromise = newPromise(function (resolve, reject) { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + var flushPromise = controller._flushAlgorithm(); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(flushPromise, function () { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerClose(readable._readableStreamController); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, function (r) { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +// TransformStreamDefaultSource Algorithms +function TransformStreamDefaultSourcePullAlgorithm(stream) { + // Invariant. Enforced by the promises returned by start() and pull(). + TransformStreamSetBackpressure(stream, false); + // Prevent the next pull() call until there is backpressure. + return stream._backpressureChangePromise; +} +function TransformStreamDefaultSourceCancelAlgorithm(stream, reason) { + var controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._writable cannot change after construction, so caching it across a call to user code is safe. + var writable = stream._writable; + // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or + // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the + // _flushAlgorithm. + controller._finishPromise = newPromise(function (resolve, reject) { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + var cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, function () { + if (writable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, writable._storedError); + } + else { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, function (r) { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +// Helper functions for the TransformStreamDefaultController. +function defaultControllerBrandCheckException(name) { + return new TypeError("TransformStreamDefaultController.prototype.".concat(name, " can only be used on a TransformStreamDefaultController")); +} +function defaultControllerFinishPromiseResolve(controller) { + if (controller._finishPromise_resolve === undefined) { + return; + } + controller._finishPromise_resolve(); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +function defaultControllerFinishPromiseReject(controller, reason) { + if (controller._finishPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(controller._finishPromise); + controller._finishPromise_reject(reason); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +// Helper functions for the TransformStream. +function streamBrandCheckException(name) { + return new TypeError("TransformStream.prototype.".concat(name, " can only be used on a TransformStream")); +} + +var exports = { + ReadableStream: ReadableStream, + ReadableStreamDefaultController: ReadableStreamDefaultController, + ReadableByteStreamController: ReadableByteStreamController, + ReadableStreamBYOBRequest: ReadableStreamBYOBRequest, + ReadableStreamDefaultReader: ReadableStreamDefaultReader, + ReadableStreamBYOBReader: ReadableStreamBYOBReader, + WritableStream: WritableStream, + WritableStreamDefaultController: WritableStreamDefaultController, + WritableStreamDefaultWriter: WritableStreamDefaultWriter, + ByteLengthQueuingStrategy: ByteLengthQueuingStrategy, + CountQueuingStrategy: CountQueuingStrategy, + TransformStream: TransformStream, + TransformStreamDefaultController: TransformStreamDefaultController +}; +// Add classes to global scope +if (typeof globals !== 'undefined') { + for (var prop in exports) { + if (Object.prototype.hasOwnProperty.call(exports, prop)) { + Object.defineProperty(globals, prop, { + value: exports[prop], + writable: true, + configurable: true + }); + } + } +} + +export { ByteLengthQueuingStrategy, CountQueuingStrategy, ReadableByteStreamController, ReadableStream, ReadableStreamBYOBReader, ReadableStreamBYOBRequest, ReadableStreamDefaultController, ReadableStreamDefaultReader, TransformStream, TransformStreamDefaultController, WritableStream, WritableStreamDefaultController, WritableStreamDefaultWriter }; +//# sourceMappingURL=polyfill.mjs.map diff --git a/node_modules/web-streams-polyfill/dist/polyfill.mjs.map b/node_modules/web-streams-polyfill/dist/polyfill.mjs.map new file mode 100644 index 00000000..a8b2b082 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/polyfill.mjs.map @@ -0,0 +1 @@ +{"version":3,"file":"polyfill.mjs","sources":["../src/stub/symbol.ts","../node_modules/tslib/tslib.es6.js","../src/utils.ts","../src/lib/helpers/miscellaneous.ts","../src/lib/helpers/webidl.ts","../src/lib/simple-queue.ts","../src/lib/abstract-ops/internal-methods.ts","../src/lib/readable-stream/generic-reader.ts","../src/stub/number-isfinite.ts","../src/stub/math-trunc.ts","../src/lib/validators/basic.ts","../src/lib/validators/readable-stream.ts","../src/lib/readable-stream/default-reader.ts","../src/lib/abstract-ops/ecmascript.ts","../src/target/es5/stub/async-iterator-prototype.ts","../src/lib/readable-stream/async-iterator.ts","../src/stub/number-isnan.ts","../src/lib/abstract-ops/miscellaneous.ts","../src/lib/abstract-ops/queue-with-sizes.ts","../src/lib/helpers/array-buffer-view.ts","../src/lib/readable-stream/byte-stream-controller.ts","../src/lib/validators/reader-options.ts","../src/lib/readable-stream/byob-reader.ts","../src/lib/abstract-ops/queuing-strategy.ts","../src/lib/validators/queuing-strategy.ts","../src/lib/validators/underlying-sink.ts","../src/lib/validators/writable-stream.ts","../src/lib/abort-signal.ts","../src/lib/writable-stream.ts","../src/globals.ts","../src/stub/dom-exception.ts","../src/lib/readable-stream/pipe.ts","../src/lib/readable-stream/default-controller.ts","../src/lib/readable-stream/tee.ts","../src/lib/readable-stream/readable-stream-like.ts","../src/lib/readable-stream/from.ts","../src/lib/validators/underlying-source.ts","../src/lib/validators/iterator-options.ts","../src/lib/validators/pipe-options.ts","../src/lib/validators/readable-writable-pair.ts","../src/lib/readable-stream.ts","../src/lib/validators/queuing-strategy-init.ts","../src/lib/byte-length-queuing-strategy.ts","../src/lib/count-queuing-strategy.ts","../src/lib/validators/transformer.ts","../src/lib/transform-stream.ts","../src/polyfill.ts"],"sourcesContent":["/// \n\nconst SymbolPolyfill: (description?: string) => symbol =\n typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ?\n Symbol :\n description => `Symbol(${description})` as any as symbol;\n\nexport default SymbolPolyfill;\n","/******************************************************************************\r\nCopyright (c) Microsoft Corporation.\r\n\r\nPermission to use, copy, modify, and/or distribute this software for any\r\npurpose with or without fee is hereby granted.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\r\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY\r\nAND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\r\n***************************************************************************** */\r\n/* global Reflect, Promise, SuppressedError, Symbol */\r\n\r\nvar extendStatics = function(d, b) {\r\n extendStatics = Object.setPrototypeOf ||\r\n ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\r\n return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n if (typeof b !== \"function\" && b !== null)\r\n throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\r\n extendStatics(d, b);\r\n function __() { this.constructor = d; }\r\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\nexport var __assign = function() {\r\n __assign = Object.assign || function __assign(t) {\r\n for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n s = arguments[i];\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n }\r\n return t;\r\n }\r\n return __assign.apply(this, arguments);\r\n}\r\n\r\nexport function __rest(s, e) {\r\n var t = {};\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\r\n t[p] = s[p];\r\n if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\r\n for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {\r\n if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))\r\n t[p[i]] = s[p[i]];\r\n }\r\n return t;\r\n}\r\n\r\nexport function __decorate(decorators, target, key, desc) {\r\n var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\r\n if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\r\n else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\r\n return c > 3 && r && Object.defineProperty(target, key, r), r;\r\n}\r\n\r\nexport function __param(paramIndex, decorator) {\r\n return function (target, key) { decorator(target, key, paramIndex); }\r\n}\r\n\r\nexport function __esDecorate(ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {\r\n function accept(f) { if (f !== void 0 && typeof f !== \"function\") throw new TypeError(\"Function expected\"); return f; }\r\n var kind = contextIn.kind, key = kind === \"getter\" ? \"get\" : kind === \"setter\" ? \"set\" : \"value\";\r\n var target = !descriptorIn && ctor ? contextIn[\"static\"] ? ctor : ctor.prototype : null;\r\n var descriptor = descriptorIn || (target ? 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(function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n var desc = Object.getOwnPropertyDescriptor(m, k);\r\n if (!desc || (\"get\" in desc ? !m.__esModule : desc.writable || desc.configurable)) {\r\n desc = { enumerable: true, get: function() { return m[k]; } };\r\n }\r\n Object.defineProperty(o, k2, desc);\r\n}) : (function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n o[k2] = m[k];\r\n});\r\n\r\nexport function __exportStar(m, o) {\r\n for (var p in m) if (p !== \"default\" && !Object.prototype.hasOwnProperty.call(o, p)) __createBinding(o, m, p);\r\n}\r\n\r\nexport function __values(o) {\r\n var s = typeof Symbol === \"function\" && Symbol.iterator, m = s && o[s], i = 0;\r\n if (m) return m.call(o);\r\n if (o && typeof o.length === \"number\") return {\r\n next: function () {\r\n if (o && i >= o.length) o = void 0;\r\n return { value: o && o[i++], done: !o };\r\n }\r\n };\r\n throw new TypeError(s ? \"Object is not iterable.\" : \"Symbol.iterator is not defined.\");\r\n}\r\n\r\nexport function __read(o, n) {\r\n var m = typeof Symbol === \"function\" && o[Symbol.iterator];\r\n if (!m) return o;\r\n var i = m.call(o), r, ar = [], e;\r\n try {\r\n while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\r\n }\r\n catch (error) { e = { error: error }; }\r\n finally {\r\n try {\r\n if (r && !r.done && (m = i[\"return\"])) m.call(i);\r\n }\r\n finally { if (e) throw e.error; }\r\n }\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spread() {\r\n for (var ar = [], i = 0; i < arguments.length; i++)\r\n ar = ar.concat(__read(arguments[i]));\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spreadArrays() {\r\n for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;\r\n for (var r = Array(s), k = 0, i = 0; i < il; i++)\r\n for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)\r\n r[k] = a[j];\r\n return r;\r\n}\r\n\r\nexport function __spreadArray(to, from, pack) {\r\n if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {\r\n if (ar || !(i in from)) {\r\n if (!ar) ar = Array.prototype.slice.call(from, 0, i);\r\n ar[i] = from[i];\r\n }\r\n }\r\n return to.concat(ar || Array.prototype.slice.call(from));\r\n}\r\n\r\nexport function __await(v) {\r\n return this instanceof __await ? (this.v = v, this) : new __await(v);\r\n}\r\n\r\nexport function __asyncGenerator(thisArg, _arguments, generator) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var g = generator.apply(thisArg, _arguments || []), i, q = [];\r\n return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\r\n function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\r\n function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\r\n function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n function fulfill(value) { resume(\"next\", value); }\r\n function reject(value) { resume(\"throw\", value); }\r\n function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n var i, p;\r\n return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var m = o[Symbol.asyncIterator], i;\r\n return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n return cooked;\r\n};\r\n\r\nvar __setModuleDefault = Object.create ? (function(o, v) {\r\n Object.defineProperty(o, \"default\", { enumerable: true, value: v });\r\n}) : function(o, v) {\r\n o[\"default\"] = v;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n if (mod && mod.__esModule) return mod;\r\n var result = {};\r\n if (mod != null) for (var k in mod) if (k !== \"default\" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);\r\n __setModuleDefault(result, mod);\r\n return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n\r\nexport function __classPrivateFieldGet(receiver, state, kind, f) {\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a getter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot read private member from an object whose class did not declare it\");\r\n return kind === \"m\" ? f : kind === \"a\" ? f.call(receiver) : f ? f.value : state.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, state, value, kind, f) {\r\n if (kind === \"m\") throw new TypeError(\"Private method is not writable\");\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a setter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot write private member to an object whose class did not declare it\");\r\n return (kind === \"a\" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;\r\n}\r\n\r\nexport function __classPrivateFieldIn(state, receiver) {\r\n if (receiver === null || (typeof receiver !== \"object\" && typeof receiver !== \"function\")) throw new TypeError(\"Cannot use 'in' operator on non-object\");\r\n return typeof state === \"function\" ? receiver === state : state.has(receiver);\r\n}\r\n\r\nexport function __addDisposableResource(env, value, async) {\r\n if (value !== null && value !== void 0) {\r\n if (typeof value !== \"object\" && typeof value !== \"function\") throw new TypeError(\"Object expected.\");\r\n var dispose;\r\n if (async) {\r\n if (!Symbol.asyncDispose) throw new TypeError(\"Symbol.asyncDispose is not defined.\");\r\n dispose = value[Symbol.asyncDispose];\r\n }\r\n if (dispose === void 0) {\r\n if (!Symbol.dispose) throw new TypeError(\"Symbol.dispose is not defined.\");\r\n dispose = value[Symbol.dispose];\r\n }\r\n if (typeof dispose !== \"function\") throw new TypeError(\"Object not disposable.\");\r\n env.stack.push({ value: value, dispose: dispose, async: async });\r\n }\r\n else if (async) {\r\n env.stack.push({ async: true });\r\n }\r\n return value;\r\n}\r\n\r\nvar _SuppressedError = typeof SuppressedError === \"function\" ? SuppressedError : function (error, suppressed, message) {\r\n var e = new Error(message);\r\n return e.name = \"SuppressedError\", e.error = error, e.suppressed = suppressed, e;\r\n};\r\n\r\nexport function __disposeResources(env) {\r\n function fail(e) {\r\n env.error = env.hasError ? new _SuppressedError(e, env.error, \"An error was suppressed during disposal.\") : e;\r\n env.hasError = true;\r\n }\r\n function next() {\r\n while (env.stack.length) {\r\n var rec = env.stack.pop();\r\n try {\r\n var result = rec.dispose && rec.dispose.call(rec.value);\r\n if (rec.async) return Promise.resolve(result).then(next, function(e) { fail(e); return next(); });\r\n }\r\n catch (e) {\r\n fail(e);\r\n }\r\n }\r\n if (env.hasError) throw env.error;\r\n }\r\n return next();\r\n}\r\n\r\nexport default {\r\n __extends: __extends,\r\n __assign: __assign,\r\n __rest: __rest,\r\n __decorate: __decorate,\r\n __param: __param,\r\n __metadata: __metadata,\r\n __awaiter: __awaiter,\r\n __generator: __generator,\r\n __createBinding: __createBinding,\r\n __exportStar: __exportStar,\r\n __values: __values,\r\n __read: __read,\r\n __spread: __spread,\r\n __spreadArrays: __spreadArrays,\r\n __spreadArray: __spreadArray,\r\n __await: __await,\r\n __asyncGenerator: __asyncGenerator,\r\n __asyncDelegator: __asyncDelegator,\r\n __asyncValues: __asyncValues,\r\n __makeTemplateObject: __makeTemplateObject,\r\n __importStar: __importStar,\r\n __importDefault: __importDefault,\r\n __classPrivateFieldGet: __classPrivateFieldGet,\r\n __classPrivateFieldSet: __classPrivateFieldSet,\r\n __classPrivateFieldIn: __classPrivateFieldIn,\r\n __addDisposableResource: __addDisposableResource,\r\n __disposeResources: __disposeResources,\r\n};\r\n","export function noop(): undefined {\n return undefined;\n}\n","import { noop } from '../../utils';\nimport { AssertionError } from '../../stub/assert';\n\nexport function typeIsObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport const rethrowAssertionErrorRejection: (e: any) => void =\n DEBUG ? e => {\n // Used throughout the reference implementation, as `.catch(rethrowAssertionErrorRejection)`, to ensure any errors\n // get shown. There are places in the spec where we do promise transformations and purposefully ignore or don't\n // expect any errors, but assertion errors are always problematic.\n if (e && e instanceof AssertionError) {\n setTimeout(() => {\n throw e;\n }, 0);\n }\n } : noop;\n\nexport function setFunctionName(fn: Function, name: string): void {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n } catch {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n}\n","import { rethrowAssertionErrorRejection } from './miscellaneous';\nimport assert from '../../stub/assert';\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\n\n// https://webidl.spec.whatwg.org/#a-new-promise\nexport function newPromise(executor: (\n resolve: (value: T | PromiseLike) => void,\n reject: (reason?: any) => void\n) => void): Promise {\n return new originalPromise(executor);\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-resolved-with\nexport function promiseResolvedWith(value: T | PromiseLike): Promise {\n return newPromise(resolve => resolve(value));\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-rejected-with\nexport function promiseRejectedWith(reason: any): Promise {\n return originalPromiseReject(reason);\n}\n\nexport function PerformPromiseThen(\n promise: Promise,\n onFulfilled?: (value: T) => TResult1 | PromiseLike,\n onRejected?: (reason: any) => TResult2 | PromiseLike): Promise {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected) as Promise;\n}\n\n// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n// from that handler. To prevent this, return null instead of void from all handlers.\n// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\nexport function uponPromise(\n promise: Promise,\n onFulfilled?: (value: T) => null | PromiseLike,\n onRejected?: (reason: any) => null | PromiseLike): void {\n PerformPromiseThen(\n PerformPromiseThen(promise, onFulfilled, onRejected),\n undefined,\n rethrowAssertionErrorRejection\n );\n}\n\nexport function uponFulfillment(promise: Promise, onFulfilled: (value: T) => null | PromiseLike): void {\n uponPromise(promise, onFulfilled);\n}\n\nexport function uponRejection(promise: Promise, onRejected: (reason: any) => null | PromiseLike): void {\n uponPromise(promise, undefined, onRejected);\n}\n\nexport function transformPromiseWith(\n promise: Promise,\n fulfillmentHandler?: (value: T) => TResult1 | PromiseLike,\n rejectionHandler?: (reason: any) => TResult2 | PromiseLike): Promise {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\n\nexport function setPromiseIsHandledToTrue(promise: Promise): void {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\nlet _queueMicrotask: (callback: () => void) => void = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n } else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n};\n\nexport { _queueMicrotask as queueMicrotask };\n\nexport function reflectCall(F: (this: T, ...fnArgs: A) => R, V: T, args: A): R {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n}\n\nexport function promiseCall(F: (this: T, ...fnArgs: A) => R | PromiseLike,\n V: T,\n args: A): Promise {\n assert(typeof F === 'function');\n assert(V !== undefined);\n assert(Array.isArray(args));\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n } catch (value) {\n return promiseRejectedWith(value);\n }\n}\n","import assert from '../stub/assert';\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n\ninterface Node {\n _elements: T[];\n _next: Node | undefined;\n}\n\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nexport class SimpleQueue {\n private _front: Node;\n private _back: Node;\n private _cursor = 0;\n private _size = 0;\n\n constructor() {\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n\n get length(): number {\n return this._size;\n }\n\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element: T): void {\n const oldBack = this._back;\n let newBack = oldBack;\n assert(oldBack._next === undefined);\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n assert(elements.length === QUEUE_MAX_ARRAY_SIZE);\n assert(oldFront._next !== undefined);\n newFront = oldFront._next!;\n newCursor = 0;\n }\n\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined!;\n\n return element;\n }\n\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback: (element: T) => void): void {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n assert(node._next !== undefined);\n assert(i === QUEUE_MAX_ARRAY_SIZE);\n node = node._next!;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n}\n","export const AbortSteps = Symbol('[[AbortSteps]]');\nexport const ErrorSteps = Symbol('[[ErrorSteps]]');\nexport const CancelSteps = Symbol('[[CancelSteps]]');\nexport const PullSteps = Symbol('[[PullSteps]]');\nexport const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n","import assert from '../../stub/assert';\nimport { ReadableStream, ReadableStreamCancel, type ReadableStreamReader } from '../readable-stream';\nimport { newPromise, setPromiseIsHandledToTrue } from '../helpers/webidl';\nimport { ReleaseSteps } from '../abstract-ops/internal-methods';\n\nexport function ReadableStreamReaderGenericInitialize(reader: ReadableStreamReader, stream: ReadableStream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n } else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n } else {\n assert(stream._state === 'errored');\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n}\n\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\n\nexport function ReadableStreamReaderGenericCancel(reader: ReadableStreamReader, reason: any): Promise {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n return ReadableStreamCancel(stream, reason);\n}\n\nexport function ReadableStreamReaderGenericRelease(reader: ReadableStreamReader) {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n assert(stream._reader === reader);\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n } else {\n defaultReaderClosedPromiseResetToRejected(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n\n stream._readableStreamController[ReleaseSteps]();\n\n stream._reader = undefined;\n reader._ownerReadableStream = undefined!;\n}\n\n// Helper functions for the readers.\n\nexport function readerLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nexport function defaultReaderClosedPromiseInitialize(reader: ReadableStreamReader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n}\n\nexport function defaultReaderClosedPromiseInitializeAsRejected(reader: ReadableStreamReader, reason: any) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseInitializeAsResolved(reader: ReadableStreamReader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n}\n\nexport function defaultReaderClosedPromiseReject(reader: ReadableStreamReader, reason: any) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n\nexport function defaultReaderClosedPromiseResetToRejected(reader: ReadableStreamReader, reason: any) {\n assert(reader._closedPromise_resolve === undefined);\n assert(reader._closedPromise_reject === undefined);\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseResolve(reader: ReadableStreamReader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite: typeof Number.isFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n};\n\nexport default NumberIsFinite;\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc: typeof Math.trunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\nexport default MathTrunc;\n","import NumberIsFinite from '../../stub/number-isfinite';\nimport MathTrunc from '../../stub/math-trunc';\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nexport function isDictionary(x: any): x is object | null {\n return typeof x === 'object' || typeof x === 'function';\n}\n\nexport function assertDictionary(obj: unknown,\n context: string): asserts obj is object | null | undefined {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport type AnyFunction = (...args: any[]) => any;\n\n// https://heycam.github.io/webidl/#idl-callback-functions\nexport function assertFunction(x: unknown, context: string): asserts x is AnyFunction {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-object\nexport function isObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport function assertObject(x: unknown,\n context: string): asserts x is object {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport function assertRequiredArgument(x: T | undefined,\n position: number,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n}\n\nexport function assertRequiredField(x: T | undefined,\n field: string,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nexport function convertUnrestrictedDouble(value: unknown): number {\n return Number(value);\n}\n\nfunction censorNegativeZero(x: number): number {\n return x === 0 ? 0 : x;\n}\n\nfunction integerPart(x: number): number {\n return censorNegativeZero(MathTrunc(x));\n}\n\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nexport function convertUnsignedLongLongWithEnforceRange(value: unknown, context: string): number {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n\n let x = Number(value);\n x = censorNegativeZero(x);\n\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n\n x = integerPart(x);\n\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n\n return x;\n}\n","import { IsReadableStream, ReadableStream } from '../readable-stream';\n\nexport function assertReadableStream(x: unknown, context: string): asserts x is ReadableStream {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, ReadableStream } from '../readable-stream';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { PullSteps } from '../abstract-ops/internal-methods';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\n\n/**\n * A result returned by {@link ReadableStreamDefaultReader.read}.\n *\n * @public\n */\nexport type ReadableStreamDefaultReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value?: undefined;\n}\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamDefaultReader(stream: ReadableStream): ReadableStreamDefaultReader {\n return new ReadableStreamDefaultReader(stream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadRequest(stream: ReadableStream,\n readRequest: ReadRequest): void {\n assert(IsReadableStreamDefaultReader(stream._reader));\n assert(stream._state === 'readable');\n\n (stream._reader! as ReadableStreamDefaultReader)._readRequests.push(readRequest);\n}\n\nexport function ReadableStreamFulfillReadRequest(stream: ReadableStream, chunk: R | undefined, done: boolean) {\n const reader = stream._reader as ReadableStreamDefaultReader;\n\n assert(reader._readRequests.length > 0);\n\n const readRequest = reader._readRequests.shift()!;\n if (done) {\n readRequest._closeSteps();\n } else {\n readRequest._chunkSteps(chunk!);\n }\n}\n\nexport function ReadableStreamGetNumReadRequests(stream: ReadableStream): number {\n return (stream._reader as ReadableStreamDefaultReader)._readRequests.length;\n}\n\nexport function ReadableStreamHasDefaultReader(stream: ReadableStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadRequest {\n _chunkSteps(chunk: R): void;\n\n _closeSteps(): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamDefaultReader {\n /** @internal */\n _ownerReadableStream!: ReadableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(): Promise> {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamDefaultReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamDefaultReader(x: any): x is ReadableStreamDefaultReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultReader;\n}\n\nexport function ReadableStreamDefaultReaderRead(reader: ReadableStreamDefaultReader,\n readRequest: ReadRequest): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n } else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n } else {\n assert(stream._state === 'readable');\n stream._readableStreamController[PullSteps](readRequest as ReadRequest);\n }\n}\n\nexport function ReadableStreamDefaultReaderRelease(reader: ReadableStreamDefaultReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n}\n\nexport function ReadableStreamDefaultReaderErrorReadRequests(reader: ReadableStreamDefaultReader, e: any) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nfunction defaultReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n","import { reflectCall } from 'lib/helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport assert from '../../stub/assert';\n\ndeclare global {\n interface ArrayBuffer {\n readonly detached: boolean;\n\n transfer(): ArrayBuffer;\n }\n\n function structuredClone(value: T, options: { transfer: ArrayBuffer[] }): T;\n}\n\nexport function CreateArrayFromList(elements: T): T {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice() as T;\n}\n\nexport function CopyDataBlockBytes(dest: ArrayBuffer,\n destOffset: number,\n src: ArrayBuffer,\n srcOffset: number,\n n: number) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n\nexport let TransferArrayBuffer = (O: ArrayBuffer): ArrayBuffer => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n } else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n } else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n};\n\nexport function CanTransferArrayBuffer(O: ArrayBuffer): boolean {\n return !IsDetachedBuffer(O);\n}\n\nexport let IsDetachedBuffer = (O: ArrayBuffer): boolean => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n } else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n};\n\nexport function ArrayBufferSlice(buffer: ArrayBuffer, begin: number, end: number): ArrayBuffer {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n}\n\nexport type MethodName = {\n [P in keyof T]: T[P] extends Function | undefined ? P : never;\n}[keyof T];\n\nexport function GetMethod>(receiver: T, prop: K): T[K] | undefined {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n}\n\nexport interface SyncIteratorRecord {\n iterator: Iterator,\n nextMethod: Iterator['next'],\n done: boolean;\n}\n\nexport interface AsyncIteratorRecord {\n iterator: AsyncIterator,\n nextMethod: AsyncIterator['next'],\n done: boolean;\n}\n\nexport type SyncOrAsyncIteratorRecord = SyncIteratorRecord | AsyncIteratorRecord;\n\nexport function CreateAsyncFromSyncIterator(syncIteratorRecord: SyncIteratorRecord): AsyncIteratorRecord {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n}\n\n// Aligns with core-js/modules/es.symbol.async-iterator.js\nexport const SymbolAsyncIterator: (typeof Symbol)['asyncIterator'] =\n Symbol.asyncIterator ??\n Symbol.for?.('Symbol.asyncIterator') ??\n '@@asyncIterator';\n\nexport type SyncOrAsyncIterable = Iterable | AsyncIterable;\nexport type SyncOrAsyncIteratorMethod = () => (Iterator | AsyncIterator);\n\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint: 'async',\n method?: SyncOrAsyncIteratorMethod\n): AsyncIteratorRecord;\nfunction GetIterator(\n obj: Iterable,\n hint: 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncIteratorRecord;\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint = 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncOrAsyncIteratorRecord {\n assert(hint === 'sync' || hint === 'async');\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj as AsyncIterable, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj as Iterable, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj as Iterable, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n } else {\n method = GetMethod(obj as Iterable, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false } as SyncOrAsyncIteratorRecord;\n}\n\nexport { GetIterator };\n\nexport function IteratorNext(iteratorRecord: AsyncIteratorRecord): Promise> {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n}\n\nexport function IteratorComplete(\n iterResult: IteratorResult\n): iterResult is IteratorReturnResult {\n assert(typeIsObject(iterResult));\n return Boolean(iterResult.done);\n}\n\nexport function IteratorValue(iterResult: IteratorYieldResult): T {\n assert(typeIsObject(iterResult));\n return iterResult.value;\n}\n","/// \n\nimport { SymbolAsyncIterator } from '../../../lib/abstract-ops/ecmascript';\n\n// We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it.\nexport const AsyncIteratorPrototype: AsyncIterable = {\n // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( )\n // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator\n [SymbolAsyncIterator](this: AsyncIterator) {\n return this;\n }\n};\nObject.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false });\n","/// \n\nimport { ReadableStream } from '../readable-stream';\nimport {\n AcquireReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadableStreamDefaultReadResult,\n type ReadRequest\n} from './default-reader';\nimport { ReadableStreamReaderGenericCancel, ReadableStreamReaderGenericRelease } from './generic-reader';\nimport assert from '../../stub/assert';\nimport { AsyncIteratorPrototype } from '@@target/stub/async-iterator-prototype';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n queueMicrotask,\n transformPromiseWith\n} from '../helpers/webidl';\n\n/**\n * An async iterator returned by {@link ReadableStream.values}.\n *\n * @public\n */\nexport interface ReadableStreamAsyncIterator extends AsyncIterableIterator {\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nexport class ReadableStreamAsyncIteratorImpl {\n private readonly _reader: ReadableStreamDefaultReader;\n private readonly _preventCancel: boolean;\n private _ongoingPromise: Promise> | undefined = undefined;\n private _isFinished = false;\n\n constructor(reader: ReadableStreamDefaultReader, preventCancel: boolean) {\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n\n next(): Promise> {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n\n return(value: any): Promise> {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n\n private _nextSteps(): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n\n private _returnSteps(value: any): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n assert(reader._readRequests.length === 0);\n\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n}\n\ninterface ReadableStreamAsyncIteratorInstance extends ReadableStreamAsyncIterator {\n /** @interal */\n _asyncIteratorImpl: ReadableStreamAsyncIteratorImpl;\n\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nconst ReadableStreamAsyncIteratorPrototype: ReadableStreamAsyncIteratorInstance = {\n next(this: ReadableStreamAsyncIteratorInstance): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n\n return(this: ReadableStreamAsyncIteratorInstance, value: any): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n} as any;\nObject.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamAsyncIterator(stream: ReadableStream,\n preventCancel: boolean): ReadableStreamAsyncIterator {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator: ReadableStreamAsyncIteratorInstance = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n}\n\nfunction IsReadableStreamAsyncIterator(x: any): x is ReadableStreamAsyncIterator {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n\n try {\n // noinspection SuspiciousTypeOfGuard\n return (x as ReadableStreamAsyncIteratorInstance)._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n } catch {\n return false;\n }\n}\n\n// Helper functions for the ReadableStream.\n\nfunction streamAsyncIteratorBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN: typeof Number.isNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n};\n\nexport default NumberIsNaN;\n","import NumberIsNaN from '../../stub/number-isnan';\nimport { ArrayBufferSlice } from './ecmascript';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function IsNonNegativeNumber(v: number): boolean {\n if (typeof v !== 'number') {\n return false;\n }\n\n if (NumberIsNaN(v)) {\n return false;\n }\n\n if (v < 0) {\n return false;\n }\n\n return true;\n}\n\nexport function CloneAsUint8Array(O: NonShared): NonShared {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer) as NonShared;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsNonNegativeNumber } from './miscellaneous';\n\nexport interface QueueContainer {\n _queue: SimpleQueue;\n _queueTotalSize: number;\n}\n\nexport interface QueuePair {\n value: T;\n size: number;\n}\n\nexport function DequeueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.shift()!;\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n\n return pair.value;\n}\n\nexport function EnqueueValueWithSize(container: QueueContainer>, value: T, size: number) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n}\n\nexport function PeekQueueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.peek();\n return pair.value;\n}\n\nexport function ResetQueue(container: QueueContainer) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n}\n","export type TypedArray =\n | Int8Array\n | Uint8Array\n | Uint8ClampedArray\n | Int16Array\n | Uint16Array\n | Int32Array\n | Uint32Array\n | Float32Array\n | Float64Array;\n\nexport type NonShared = T & {\n buffer: ArrayBuffer;\n}\n\nexport interface ArrayBufferViewConstructor {\n new(buffer: ArrayBuffer, byteOffset: number, length?: number): T;\n\n readonly prototype: T;\n}\n\nexport interface TypedArrayConstructor extends ArrayBufferViewConstructor {\n readonly BYTES_PER_ELEMENT: number;\n}\n\nexport type DataViewConstructor = ArrayBufferViewConstructor;\n\nfunction isDataViewConstructor(ctor: Function): ctor is DataViewConstructor {\n return ctor === DataView;\n}\n\nexport function isDataView(view: ArrayBufferView): view is DataView {\n return isDataViewConstructor(view.constructor);\n}\n\nexport function arrayBufferViewElementSize(ctor: ArrayBufferViewConstructor): number {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return (ctor as unknown as TypedArrayConstructor).BYTES_PER_ELEMENT;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n IsReadableStreamDefaultReader,\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n ReadableStreamHasDefaultReader,\n type ReadRequest\n} from './default-reader';\nimport {\n ReadableStreamAddReadIntoRequest,\n ReadableStreamFulfillReadIntoRequest,\n ReadableStreamGetNumReadIntoRequests,\n ReadableStreamHasBYOBReader,\n type ReadIntoRequest\n} from './byob-reader';\nimport NumberIsInteger from '../../stub/number-isinteger';\nimport {\n IsReadableStreamLocked,\n type ReadableByteStream,\n ReadableStreamClose,\n ReadableStreamError\n} from '../readable-stream';\nimport type { ValidatedUnderlyingByteSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport {\n ArrayBufferSlice,\n CanTransferArrayBuffer,\n CopyDataBlockBytes,\n IsDetachedBuffer,\n TransferArrayBuffer\n} from '../abstract-ops/ecmascript';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\nimport { assertRequiredArgument, convertUnsignedLongLongWithEnforceRange } from '../validators/basic';\nimport {\n type ArrayBufferViewConstructor,\n arrayBufferViewElementSize,\n type NonShared,\n type TypedArrayConstructor\n} from '../helpers/array-buffer-view';\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nexport class ReadableStreamBYOBRequest {\n /** @internal */\n _associatedReadableByteStreamController!: ReadableByteStreamController;\n /** @internal */\n _view!: NonShared | null;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view(): ArrayBufferView | null {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n\n return this._view;\n }\n\n /**\n * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into\n * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer.\n *\n * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer\n * modifiable.\n */\n respond(bytesWritten: number): void;\n respond(bytesWritten: number | undefined): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(this._view!.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n\n assert(this._view!.byteLength > 0);\n assert(this._view!.buffer.byteLength > 0);\n\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n\n /**\n * Indicates to the associated readable byte stream that instead of writing into\n * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`,\n * which will be given to the consumer of the readable byte stream.\n *\n * After this method is called, `view` will be transferred and no longer modifiable.\n */\n respondWithNewView(view: ArrayBufferView): void;\n respondWithNewView(view: NonShared): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n}\n\ninterface ByteQueueElement {\n buffer: ArrayBuffer;\n byteOffset: number;\n byteLength: number;\n}\n\ntype PullIntoDescriptor = NonShared> =\n DefaultPullIntoDescriptor\n | BYOBPullIntoDescriptor;\n\ninterface DefaultPullIntoDescriptor {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: TypedArrayConstructor;\n readerType: 'default' | 'none';\n}\n\ninterface BYOBPullIntoDescriptor = NonShared> {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: ArrayBufferViewConstructor;\n readerType: 'byob' | 'none';\n}\n\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableByteStreamController {\n /** @internal */\n _controlledReadableByteStream!: ReadableByteStream;\n /** @internal */\n _queue!: SimpleQueue;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n /** @internal */\n _autoAllocateChunkSize: number | undefined;\n /** @internal */\n _byobRequest: ReadableStreamBYOBRequest | null;\n /** @internal */\n _pendingPullIntos!: SimpleQueue;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest(): ReadableStreamBYOBRequest | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n\n ReadableByteStreamControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk chunk in the controlled readable stream.\n * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown.\n */\n enqueue(chunk: ArrayBufferView): void;\n enqueue(chunk: NonShared): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n\n ReadableByteStreamControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n\n ResetQueue(this);\n\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest>): void {\n const stream = this._controlledReadableByteStream;\n assert(ReadableStreamHasDefaultReader(stream));\n\n if (this._queueTotalSize > 0) {\n assert(ReadableStreamGetNumReadRequests(stream) === 0);\n\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer: ArrayBuffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n } catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n\n const pullIntoDescriptor: DefaultPullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n}\n\nObject.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableByteStreamController.prototype.close, 'close');\nsetFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableByteStreamController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableByteStreamController.\n\nexport function IsReadableByteStreamController(x: any): x is ReadableByteStreamController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n\n return x instanceof ReadableByteStreamController;\n}\n\nfunction IsReadableStreamBYOBRequest(x: any): x is ReadableStreamBYOBRequest {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBRequest;\n}\n\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller: ReadableByteStreamController): void {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller: ReadableByteStreamController) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n}\n\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor>(\n stream: ReadableByteStream,\n pullIntoDescriptor: PullIntoDescriptor\n) {\n assert(stream._state !== 'errored');\n assert(pullIntoDescriptor.readerType !== 'none');\n\n let done = false;\n if (stream._state === 'closed') {\n assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);\n done = true;\n }\n\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView as unknown as NonShared, done);\n } else {\n assert(pullIntoDescriptor.readerType === 'byob');\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n}\n\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor>(\n pullIntoDescriptor: PullIntoDescriptor\n): T {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n\n assert(bytesFilled <= pullIntoDescriptor.byteLength);\n assert(bytesFilled % elementSize === 0);\n\n return new pullIntoDescriptor.viewConstructor(\n pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize) as T;\n}\n\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n}\n\nfunction ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n } catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n}\n\nfunction ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.readerType === 'none');\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n firstDescriptor.buffer,\n firstDescriptor.byteOffset,\n firstDescriptor.bytesFilled\n );\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n}\n\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller: ReadableByteStreamController,\n pullIntoDescriptor: PullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize,\n pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n\n const queue = controller._queue;\n\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n } else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n\n if (!ready) {\n assert(controller._queueTotalSize === 0);\n assert(pullIntoDescriptor.bytesFilled > 0);\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n }\n\n return ready;\n}\n\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller: ReadableByteStreamController,\n size: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);\n assert(controller._byobRequest === null);\n pullIntoDescriptor.bytesFilled += size;\n}\n\nfunction ReadableByteStreamControllerHandleQueueDrain(controller: ReadableByteStreamController) {\n assert(controller._controlledReadableByteStream._state === 'readable');\n\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n } else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n}\n\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller: ReadableByteStreamController) {\n if (controller._byobRequest === null) {\n return;\n }\n\n controller._byobRequest._associatedReadableByteStreamController = undefined!;\n controller._byobRequest._view = null!;\n controller._byobRequest = null;\n}\n\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller: ReadableByteStreamController) {\n assert(!controller._closeRequested);\n\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n assert(pullIntoDescriptor.readerType !== 'none');\n\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n ReadableByteStreamControllerCommitPullIntoDescriptor(\n controller._controlledReadableByteStream,\n pullIntoDescriptor\n );\n }\n }\n}\n\nfunction ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller: ReadableByteStreamController) {\n const reader = controller._controlledReadableByteStream._reader;\n assert(IsReadableStreamDefaultReader(reader));\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n}\n\nexport function ReadableByteStreamControllerPullInto>(\n controller: ReadableByteStreamController,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = controller._controlledReadableByteStream;\n\n const ctor = view.constructor as ArrayBufferViewConstructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n\n const { byteOffset, byteLength } = view;\n\n const minimumFill = min * elementSize;\n assert(minimumFill >= elementSize && minimumFill <= byteLength);\n assert(minimumFill % elementSize === 0);\n\n let buffer: ArrayBuffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n } catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n\n const pullIntoDescriptor: BYOBPullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInClosedState(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.bytesFilled % firstDescriptor.elementSize === 0);\n\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n}\n\nfunction ReadableByteStreamControllerRespondInReadableState(controller: ReadableByteStreamController,\n bytesWritten: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n pullIntoDescriptor.buffer,\n end - remainderSize,\n remainderSize\n );\n }\n\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInternal(controller: ReadableByteStreamController, bytesWritten: number) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n assert(CanTransferArrayBuffer(firstDescriptor.buffer));\n\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n assert(bytesWritten === 0);\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n } else {\n assert(state === 'readable');\n assert(bytesWritten > 0);\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerShiftPendingPullInto(\n controller: ReadableByteStreamController\n): PullIntoDescriptor {\n assert(controller._byobRequest === null);\n const descriptor = controller._pendingPullIntos.shift()!;\n return descriptor;\n}\n\nfunction ReadableByteStreamControllerShouldCallPull(controller: ReadableByteStreamController): boolean {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return false;\n }\n\n if (controller._closeRequested) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableByteStreamControllerClearAlgorithms(controller: ReadableByteStreamController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\n\nexport function ReadableByteStreamControllerClose(controller: ReadableByteStreamController) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n\n return;\n }\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n throw e;\n }\n }\n\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n}\n\nexport function ReadableByteStreamControllerEnqueue(\n controller: ReadableByteStreamController,\n chunk: NonShared\n) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError(\n 'The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk'\n );\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n assert(controller._pendingPullIntos.length === 0);\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n } else {\n assert(controller._queue.length === 0);\n if (controller._pendingPullIntos.length > 0) {\n assert(controller._pendingPullIntos.peek().readerType === 'default');\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView as NonShared, false);\n }\n } else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n } else {\n assert(!IsReadableStreamLocked(stream));\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableByteStreamControllerError(controller: ReadableByteStreamController, e: any) {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableByteStreamControllerFillReadRequestFromQueue(\n controller: ReadableByteStreamController,\n readRequest: ReadRequest>\n) {\n assert(controller._queueTotalSize > 0);\n\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view as NonShared);\n}\n\nexport function ReadableByteStreamControllerGetBYOBRequest(\n controller: ReadableByteStreamController\n): ReadableStreamBYOBRequest | null {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer,\n firstDescriptor.byteOffset + firstDescriptor.bytesFilled,\n firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n\n const byobRequest: ReadableStreamBYOBRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view as NonShared);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n}\n\nfunction ReadableByteStreamControllerGetDesiredSize(controller: ReadableByteStreamController): number | null {\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nexport function ReadableByteStreamControllerRespond(controller: ReadableByteStreamController, bytesWritten: number) {\n assert(controller._pendingPullIntos.length > 0);\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n}\n\nexport function ReadableByteStreamControllerRespondWithNewView(controller: ReadableByteStreamController,\n view: NonShared) {\n assert(controller._pendingPullIntos.length > 0);\n assert(!IsDetachedBuffer(view.buffer));\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (view.byteLength === 0) {\n throw new TypeError(\n 'The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'\n );\n }\n }\n\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n}\n\nexport function SetUpReadableByteStreamController(stream: ReadableByteStream,\n controller: ReadableByteStreamController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n autoAllocateChunkSize: number | undefined) {\n assert(stream._readableStreamController === undefined);\n if (autoAllocateChunkSize !== undefined) {\n assert(NumberIsInteger(autoAllocateChunkSize));\n assert(autoAllocateChunkSize > 0);\n }\n\n controller._controlledReadableByteStream = stream;\n\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._byobRequest = null;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._closeRequested = false;\n controller._started = false;\n\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n\n controller._pendingPullIntos = new SimpleQueue();\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableByteStreamControllerFromUnderlyingSource(\n stream: ReadableByteStream,\n underlyingByteSource: ValidatedUnderlyingByteSource,\n highWaterMark: number\n) {\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n\n SetUpReadableByteStreamController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize\n );\n}\n\nfunction SetUpReadableStreamBYOBRequest(request: ReadableStreamBYOBRequest,\n controller: ReadableByteStreamController,\n view: NonShared) {\n assert(IsReadableByteStreamController(controller));\n assert(typeof view === 'object');\n assert(ArrayBuffer.isView(view));\n assert(!IsDetachedBuffer(view.buffer));\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n}\n\n// Helper functions for the ReadableStreamBYOBRequest.\n\nfunction byobRequestBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n}\n\n// Helper functions for the ReadableByteStreamController.\n\nfunction byteStreamControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n}\n","import { assertDictionary, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from '../readable-stream/reader-options';\n\nexport function convertReaderOptions(options: ReadableStreamGetReaderOptions | null | undefined,\n context: string): ReadableStreamGetReaderOptions {\n assertDictionary(options, context);\n const mode = options?.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n}\n\nfunction convertReadableStreamReaderMode(mode: string, context: string): 'byob' {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n}\n\nexport function convertByobReadOptions(\n options: ReadableStreamBYOBReaderReadOptions | null | undefined,\n context: string\n): ValidatedReadableStreamBYOBReaderReadOptions {\n assertDictionary(options, context);\n const min = options?.min ?? 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(\n min,\n `${context} has member 'min' that`\n )\n };\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, type ReadableByteStream, type ReadableStream } from '../readable-stream';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamController,\n ReadableByteStreamControllerPullInto\n} from './byte-stream-controller';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\nimport { IsDetachedBuffer } from '../abstract-ops/ecmascript';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from './reader-options';\nimport { convertByobReadOptions } from '../validators/reader-options';\nimport { isDataView, type NonShared, type TypedArray } from '../helpers/array-buffer-view';\n\n/**\n * A result returned by {@link ReadableStreamBYOBReader.read}.\n *\n * @public\n */\nexport type ReadableStreamBYOBReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value: T | undefined;\n};\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamBYOBReader(stream: ReadableByteStream): ReadableStreamBYOBReader {\n return new ReadableStreamBYOBReader(stream as ReadableStream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadIntoRequest>(\n stream: ReadableByteStream,\n readIntoRequest: ReadIntoRequest\n): void {\n assert(IsReadableStreamBYOBReader(stream._reader));\n assert(stream._state === 'readable' || stream._state === 'closed');\n\n (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);\n}\n\nexport function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,\n chunk: ArrayBufferView,\n done: boolean) {\n const reader = stream._reader as ReadableStreamBYOBReader;\n\n assert(reader._readIntoRequests.length > 0);\n\n const readIntoRequest = reader._readIntoRequests.shift()!;\n if (done) {\n readIntoRequest._closeSteps(chunk);\n } else {\n readIntoRequest._chunkSteps(chunk);\n }\n}\n\nexport function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {\n return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;\n}\n\nexport function ReadableStreamHasBYOBReader(stream: ReadableByteStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadIntoRequest> {\n _chunkSteps(chunk: T): void;\n\n _closeSteps(chunk: T | undefined): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamBYOBReader {\n /** @internal */\n _ownerReadableStream!: ReadableByteStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readIntoRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readIntoRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Attempts to reads bytes into view, and returns a promise resolved with the result.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(\n view: T,\n options?: ReadableStreamBYOBReaderReadOptions\n ): Promise>;\n read>(\n view: T,\n rawOptions: ReadableStreamBYOBReaderReadOptions | null | undefined = {}\n ): Promise> {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n\n let options: ValidatedReadableStreamBYOBReaderReadOptions;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > (view as unknown as TypedArray).length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n } else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamBYOBReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest: ReadIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamBYOBReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBReader;\n}\n\nexport function ReadableStreamBYOBReaderRead>(\n reader: ReadableStreamBYOBReader,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n } else {\n ReadableByteStreamControllerPullInto(\n stream._readableStreamController as ReadableByteStreamController,\n view,\n min,\n readIntoRequest\n );\n }\n}\n\nexport function ReadableStreamBYOBReaderRelease(reader: ReadableStreamBYOBReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n}\n\nexport function ReadableStreamBYOBReaderErrorReadIntoRequests(reader: ReadableStreamBYOBReader, e: any) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamBYOBReader.\n\nfunction byobReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport NumberIsNaN from '../../stub/number-isnan';\n\nexport function ExtractHighWaterMark(strategy: QueuingStrategy, defaultHWM: number): number {\n const { highWaterMark } = strategy;\n\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n\n return highWaterMark;\n}\n\nexport function ExtractSizeAlgorithm(strategy: QueuingStrategy): QueuingStrategySizeCallback {\n const { size } = strategy;\n\n if (!size) {\n return () => 1;\n }\n\n return size;\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport { assertDictionary, assertFunction, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategy(init: QueuingStrategy | null | undefined,\n context: string): QueuingStrategy {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n const size = init?.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n}\n\nfunction convertQueuingStrategySize(fn: QueuingStrategySizeCallback,\n context: string): QueuingStrategySizeCallback {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from '../writable-stream/underlying-sink';\nimport { WritableStreamDefaultController } from '../writable-stream';\n\nexport function convertUnderlyingSink(original: UnderlyingSink | null,\n context: string): ValidatedUnderlyingSink {\n assertDictionary(original, context);\n const abort = original?.abort;\n const close = original?.close;\n const start = original?.start;\n const type = original?.type;\n const write = original?.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original!, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original!, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original!, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original!, `${context} has member 'write' that`),\n type\n };\n}\n\nfunction convertUnderlyingSinkAbortCallback(\n fn: UnderlyingSinkAbortCallback,\n original: UnderlyingSink,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSinkCloseCallback(\n fn: UnderlyingSinkCloseCallback,\n original: UnderlyingSink,\n context: string\n): () => Promise {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n}\n\nfunction convertUnderlyingSinkStartCallback(\n fn: UnderlyingSinkStartCallback,\n original: UnderlyingSink,\n context: string\n): UnderlyingSinkStartCallback {\n assertFunction(fn, context);\n return (controller: WritableStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSinkWriteCallback(\n fn: UnderlyingSinkWriteCallback,\n original: UnderlyingSink,\n context: string\n): (chunk: W, controller: WritableStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: W, controller: WritableStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n","import { IsWritableStream, WritableStream } from '../writable-stream';\n\nexport function assertWritableStream(x: unknown, context: string): asserts x is WritableStream {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n}\n","/**\n * A signal object that allows you to communicate with a request and abort it if required\n * via its associated `AbortController` object.\n *\n * @remarks\n * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @public\n */\nexport interface AbortSignal {\n /**\n * Whether the request is aborted.\n */\n readonly aborted: boolean;\n\n /**\n * If aborted, returns the reason for aborting.\n */\n readonly reason?: any;\n\n /**\n * Add an event listener to be triggered when this signal becomes aborted.\n */\n addEventListener(type: 'abort', listener: () => void): void;\n\n /**\n * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}.\n */\n removeEventListener(type: 'abort', listener: () => void): void;\n}\n\nexport function isAbortSignal(value: unknown): value is AbortSignal {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof (value as AbortSignal).aborted === 'boolean';\n } catch {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n}\n\n/**\n * A controller object that allows you to abort an `AbortSignal` when desired.\n *\n * @remarks\n * This interface is compatible with the `AbortController` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @internal\n */\nexport interface AbortController {\n readonly signal: AbortSignal;\n\n abort(reason?: any): void;\n}\n\ninterface AbortControllerConstructor {\n new(): AbortController;\n}\n\nconst supportsAbortController = typeof (AbortController as any) === 'function';\n\n/**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\nexport function createAbortController(): AbortController | undefined {\n if (supportsAbortController) {\n return new (AbortController as AbortControllerConstructor)();\n }\n return undefined;\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponPromise\n} from './helpers/webidl';\nimport {\n DequeueValue,\n EnqueueValueWithSize,\n PeekQueueValue,\n type QueuePair,\n ResetQueue\n} from './abstract-ops/queue-with-sizes';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { SimpleQueue } from './simple-queue';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { AbortSteps, ErrorSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from './writable-stream/underlying-sink';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertUnderlyingSink } from './validators/underlying-sink';\nimport { assertWritableStream } from './validators/writable-stream';\nimport { type AbortController, type AbortSignal, createAbortController } from './abort-signal';\n\ntype WritableStreamState = 'writable' | 'closed' | 'erroring' | 'errored';\n\ninterface WriteOrCloseRequest {\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n}\n\ntype WriteRequest = WriteOrCloseRequest;\ntype CloseRequest = WriteOrCloseRequest;\n\ninterface PendingAbortRequest {\n _promise: Promise;\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n _reason: any;\n _wasAlreadyErroring: boolean;\n}\n\n/**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\nclass WritableStream {\n /** @internal */\n _state!: WritableStreamState;\n /** @internal */\n _storedError: any;\n /** @internal */\n _writer: WritableStreamDefaultWriter | undefined;\n /** @internal */\n _writableStreamController!: WritableStreamDefaultController;\n /** @internal */\n _writeRequests!: SimpleQueue;\n /** @internal */\n _inFlightWriteRequest: WriteRequest | undefined;\n /** @internal */\n _closeRequest: CloseRequest | undefined;\n /** @internal */\n _inFlightCloseRequest: CloseRequest | undefined;\n /** @internal */\n _pendingAbortRequest: PendingAbortRequest | undefined;\n /** @internal */\n _backpressure!: boolean;\n\n constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSink: UnderlyingSink | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n } else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n\n InitializeWritableStream(this);\n\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked(): boolean {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsWritableStreamLocked(this);\n }\n\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('abort'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n\n return WritableStreamAbort(this, reason);\n }\n\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('close'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamClose(this);\n }\n\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter(): WritableStreamDefaultWriter {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('getWriter');\n }\n\n return AcquireWritableStreamDefaultWriter(this);\n }\n}\n\nObject.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(WritableStream.prototype.abort, 'abort');\nsetFunctionName(WritableStream.prototype.close, 'close');\nsetFunctionName(WritableStream.prototype.getWriter, 'getWriter');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n}\n\nexport {\n AcquireWritableStreamDefaultWriter,\n CreateWritableStream,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamDefaultControllerErrorIfNeeded,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite,\n WritableStreamCloseQueuedOrInFlight\n};\n\nexport type {\n UnderlyingSink,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkAbortCallback\n};\n\n// Abstract operations for the WritableStream.\n\nfunction AcquireWritableStreamDefaultWriter(stream: WritableStream): WritableStreamDefaultWriter {\n return new WritableStreamDefaultWriter(stream);\n}\n\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: WritableStream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n\n const controller: WritableStreamDefaultController = Object.create(WritableStreamDefaultController.prototype);\n\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm,\n abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n}\n\nfunction InitializeWritableStream(stream: WritableStream) {\n stream._state = 'writable';\n\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n\n stream._writer = undefined;\n\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined!;\n\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n}\n\nfunction IsWritableStream(x: unknown): x is WritableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n\n return x instanceof WritableStream;\n}\n\nfunction IsWritableStreamLocked(stream: WritableStream): boolean {\n assert(IsWritableStream(stream));\n\n if (stream._writer === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamAbort(stream: WritableStream, reason: any): Promise {\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n stream._writableStreamController._abortController?.abort(reason);\n\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state as WritableStreamState;\n\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined!,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest!._promise = promise;\n\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n\n return promise;\n}\n\nfunction WritableStreamClose(stream: WritableStream): Promise {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(\n `The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n\n assert(state === 'writable' || state === 'erroring');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const promise = newPromise((resolve, reject) => {\n const closeRequest: CloseRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._closeRequest = closeRequest;\n });\n\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n\n return promise;\n}\n\n// WritableStream API exposed for controllers.\n\nfunction WritableStreamAddWriteRequest(stream: WritableStream): Promise {\n assert(IsWritableStreamLocked(stream));\n assert(stream._state === 'writable');\n\n const promise = newPromise((resolve, reject) => {\n const writeRequest: WriteRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._writeRequests.push(writeRequest);\n });\n\n return promise;\n}\n\nfunction WritableStreamDealWithRejection(stream: WritableStream, error: any) {\n const state = stream._state;\n\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n\n assert(state === 'erroring');\n WritableStreamFinishErroring(stream);\n}\n\nfunction WritableStreamStartErroring(stream: WritableStream, reason: any) {\n assert(stream._storedError === undefined);\n assert(stream._state === 'writable');\n\n const controller = stream._writableStreamController;\n assert(controller !== undefined);\n\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n}\n\nfunction WritableStreamFinishErroring(stream: WritableStream) {\n assert(stream._state === 'erroring');\n assert(!WritableStreamHasOperationMarkedInFlight(stream));\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(\n promise,\n () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n },\n (reason: any) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n}\n\nfunction WritableStreamFinishInFlightWrite(stream: WritableStream) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n}\n\nfunction WritableStreamFinishInFlightWriteWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._reject(error);\n stream._inFlightWriteRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n WritableStreamDealWithRejection(stream, error);\n}\n\nfunction WritableStreamFinishInFlightClose(stream: WritableStream) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n\n const state = stream._state;\n\n assert(state === 'writable' || state === 'erroring');\n\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n\n stream._state = 'closed';\n\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n\n assert(stream._pendingAbortRequest === undefined);\n assert(stream._storedError === undefined);\n}\n\nfunction WritableStreamFinishInFlightCloseWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._reject(error);\n stream._inFlightCloseRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n}\n\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream: WritableStream): boolean {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamHasOperationMarkedInFlight(stream: WritableStream): boolean {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamMarkCloseRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightCloseRequest === undefined);\n assert(stream._closeRequest !== undefined);\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n}\n\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightWriteRequest === undefined);\n assert(stream._writeRequests.length !== 0);\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\n\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream: WritableStream) {\n assert(stream._state === 'errored');\n if (stream._closeRequest !== undefined) {\n assert(stream._inFlightCloseRequest === undefined);\n\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n}\n\nfunction WritableStreamUpdateBackpressure(stream: WritableStream, backpressure: boolean) {\n assert(stream._state === 'writable');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n } else {\n assert(!backpressure);\n\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n\n stream._backpressure = backpressure;\n}\n\n/**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\nexport class WritableStreamDefaultWriter {\n /** @internal */\n _ownerWritableStream: WritableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _closedPromiseState!: 'pending' | 'resolved' | 'rejected';\n /** @internal */\n _readyPromise!: Promise;\n /** @internal */\n _readyPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _readyPromise_reject?: (reason: any) => void;\n /** @internal */\n _readyPromiseState!: 'pending' | 'fulfilled' | 'rejected';\n\n constructor(stream: WritableStream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n\n this._ownerWritableStream = stream;\n stream._writer = this;\n\n const state = stream._state;\n\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n } else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n } else {\n assert(state === 'errored');\n\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize(): number | null {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n\n return this._readyPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamDefaultWriterClose(this);\n }\n\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock(): void {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return;\n }\n\n assert(stream._writer !== undefined);\n\n WritableStreamDefaultWriterRelease(this);\n }\n\n /**\n * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully,\n * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return\n * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes\n * errored before the writing process is initiated.\n *\n * Note that what \"success\" means is up to the underlying sink; it might indicate simply that the chunk has been\n * accepted, and not necessarily that it is safely saved to its ultimate destination.\n */\n write(chunk: W): Promise;\n write(chunk: W = undefined!): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n});\nsetFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\nsetFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\nsetFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\nsetFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n}\n\n// Abstract operations for the WritableStreamDefaultWriter.\n\nfunction IsWritableStreamDefaultWriter(x: any): x is WritableStreamDefaultWriter {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultWriter;\n}\n\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultWriterAbort(writer: WritableStreamDefaultWriter, reason: any) {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamAbort(stream, reason);\n}\n\nfunction WritableStreamDefaultWriterClose(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamClose(stream);\n}\n\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n return WritableStreamDefaultWriterClose(writer);\n}\n\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n } else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n } else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterGetDesiredSize(writer: WritableStreamDefaultWriter): number | null {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n\n if (state === 'closed') {\n return 0;\n }\n\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\n\nfunction WritableStreamDefaultWriterRelease(writer: WritableStreamDefaultWriter) {\n const stream = writer._ownerWritableStream;\n assert(stream !== undefined);\n assert(stream._writer === writer);\n\n const releasedError = new TypeError(\n `Writer was released and can no longer be used to monitor the stream's closedness`);\n\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n\n stream._writer = undefined;\n writer._ownerWritableStream = undefined!;\n}\n\nfunction WritableStreamDefaultWriterWrite(writer: WritableStreamDefaultWriter, chunk: W): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const controller = stream._writableStreamController;\n\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable');\n\n const promise = WritableStreamAddWriteRequest(stream);\n\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n\n return promise;\n}\n\nconst closeSentinel: unique symbol = {} as any;\n\ntype QueueRecord = W | typeof closeSentinel;\n\n/**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\nexport class WritableStreamDefaultController {\n /** @internal */\n _controlledWritableStream!: WritableStream;\n /** @internal */\n _queue!: SimpleQueue>>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _abortReason: any;\n /** @internal */\n _abortController: AbortController | undefined;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _writeAlgorithm!: (chunk: W) => Promise;\n /** @internal */\n _closeAlgorithm!: () => Promise;\n /** @internal */\n _abortAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason(): any {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('abortReason');\n }\n return this._abortReason;\n }\n\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal(): AbortSignal {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e: any = undefined): void {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n\n WritableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [AbortSteps](reason: any): Promise {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations implementing interface required by the WritableStream.\n\nfunction IsWritableStreamDefaultController(x: any): x is WritableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultController;\n}\n\nfunction SetUpWritableStreamDefaultController(stream: WritableStream,\n controller: WritableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(IsWritableStream(stream));\n assert(stream._writableStreamController === undefined);\n\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(\n startPromise,\n () => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n r => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n }\n );\n}\n\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream: WritableStream,\n underlyingSink: ValidatedUnderlyingSink,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let writeAlgorithm: (chunk: W) => Promise;\n let closeAlgorithm: () => Promise;\n let abortAlgorithm: (reason: any) => Promise;\n\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write!(chunk, controller);\n } else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close!();\n } else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort!(reason);\n } else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpWritableStreamDefaultController(\n stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\nfunction WritableStreamDefaultControllerClearAlgorithms(controller: WritableStreamDefaultController) {\n controller._writeAlgorithm = undefined!;\n controller._closeAlgorithm = undefined!;\n controller._abortAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\nfunction WritableStreamDefaultControllerClose(controller: WritableStreamDefaultController) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\nfunction WritableStreamDefaultControllerGetChunkSize(controller: WritableStreamDefaultController,\n chunk: W): number {\n try {\n return controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n}\n\nfunction WritableStreamDefaultControllerGetDesiredSize(controller: WritableStreamDefaultController): number {\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nfunction WritableStreamDefaultControllerWrite(controller: WritableStreamDefaultController,\n chunk: W,\n chunkSize: number) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\n// Abstract operations for the WritableStreamDefaultController.\n\nfunction WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n if (!controller._started) {\n return;\n }\n\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n\n const state = stream._state;\n assert(state !== 'closed' && state !== 'errored');\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n\n if (controller._queue.length === 0) {\n return;\n }\n\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n } else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n}\n\nfunction WritableStreamDefaultControllerErrorIfNeeded(controller: WritableStreamDefaultController, error: any) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n}\n\nfunction WritableStreamDefaultControllerProcessClose(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkCloseRequestInFlight(stream);\n\n DequeueValue(controller);\n assert(controller._queue.length === 0);\n\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(\n sinkClosePromise,\n () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n },\n reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerProcessWrite(controller: WritableStreamDefaultController, chunk: W) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(\n sinkWritePromise,\n () => {\n WritableStreamFinishInFlightWrite(stream);\n\n const state = stream._state;\n assert(state === 'writable' || state === 'erroring');\n\n DequeueValue(controller);\n\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerGetBackpressure(controller: WritableStreamDefaultController): boolean {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n}\n\n// A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultControllerError(controller: WritableStreamDefaultController, error: any) {\n const stream = controller._controlledWritableStream;\n\n assert(stream._state === 'writable');\n\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n}\n\n// Helper functions for the WritableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n}\n\n// Helper functions for the WritableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n}\n\n\n// Helper functions for the WritableStreamDefaultWriter.\n\nfunction defaultWriterBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n}\n\nfunction defaultWriterLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n}\n\nfunction defaultWriterClosedPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n}\n\nfunction defaultWriterClosedPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n}\n\nfunction defaultWriterClosedPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n}\n\nfunction defaultWriterClosedPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._closedPromise_resolve === undefined);\n assert(writer._closedPromise_reject === undefined);\n assert(writer._closedPromiseState !== 'pending');\n\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n}\n\nfunction defaultWriterReadyPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n}\n\nfunction defaultWriterReadyPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n}\n\nfunction defaultWriterReadyPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n}\n\nfunction defaultWriterReadyPromiseReset(writer: WritableStreamDefaultWriter) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitialize(writer);\n}\n\nfunction defaultWriterReadyPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n}\n","/// \n\nfunction getGlobals(): typeof globalThis | undefined {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n } else if (typeof self !== 'undefined') {\n return self;\n } else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n}\n\nexport const globals = getGlobals();\n","/// \nimport { globals } from '../globals';\nimport { setFunctionName } from '../lib/helpers/miscellaneous';\n\ninterface DOMException extends Error {\n name: string;\n message: string;\n}\n\ntype DOMExceptionConstructor = new (message?: string, name?: string) => DOMException;\n\nfunction isDOMExceptionConstructor(ctor: unknown): ctor is DOMExceptionConstructor {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if ((ctor as DOMExceptionConstructor).name !== 'DOMException') {\n return false;\n }\n try {\n new (ctor as DOMExceptionConstructor)();\n return true;\n } catch {\n return false;\n }\n}\n\n/**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\nfunction getFromGlobal(): DOMExceptionConstructor | undefined {\n const ctor = globals?.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n}\n\n/**\n * Support:\n * - All platforms\n */\nfunction createPolyfill(): DOMExceptionConstructor {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(this: DOMException, message?: string, name?: string) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n } as any;\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-redeclare\nconst DOMException: DOMExceptionConstructor = getFromGlobal() || createPolyfill();\n\nexport { DOMException };\n","import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';\nimport { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireWritableStreamDefaultWriter,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamCloseQueuedOrInFlight,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite\n} from '../writable-stream';\nimport assert from '../../stub/assert';\nimport {\n newPromise,\n PerformPromiseThen,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponFulfillment,\n uponPromise,\n uponRejection\n} from '../helpers/webidl';\nimport { noop } from '../../utils';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\nimport { DOMException } from '../../stub/dom-exception';\n\nexport function ReadableStreamPipeTo(source: ReadableStream,\n dest: WritableStream,\n preventClose: boolean,\n preventAbort: boolean,\n preventCancel: boolean,\n signal: AbortSignal | undefined): Promise {\n assert(IsReadableStream(source));\n assert(IsWritableStream(dest));\n assert(typeof preventClose === 'boolean');\n assert(typeof preventAbort === 'boolean');\n assert(typeof preventCancel === 'boolean');\n assert(signal === undefined || isAbortSignal(signal));\n assert(!IsReadableStreamLocked(source));\n assert(!IsWritableStreamLocked(dest));\n\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n\n source._disturbed = true;\n\n let shuttingDown = false;\n\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n\n return newPromise((resolve, reject) => {\n let abortAlgorithm: () => void;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions: Array<() => Promise> = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n\n signal.addEventListener('abort', abortAlgorithm);\n }\n\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done: boolean) {\n if (done) {\n resolveLoop();\n } else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n\n next(false);\n });\n }\n\n function pipeStep(): Promise {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(\n reader,\n {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n }\n );\n });\n });\n }\n\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n } else {\n shutdown();\n }\n return null;\n });\n\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n } else {\n shutdown(true, destClosed);\n }\n }\n\n setPromiseIsHandledToTrue(pipeLoop());\n\n function waitForWritesToFinish(): Promise {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(\n currentWrite,\n () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined\n );\n }\n\n function isOrBecomesErrored(stream: ReadableStream | WritableStream,\n promise: Promise,\n action: (reason: any) => null) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n } else {\n uponRejection(promise, action);\n }\n }\n\n function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise, action: () => null) {\n if (stream._state === 'closed') {\n action();\n } else {\n uponFulfillment(promise, action);\n }\n }\n\n function shutdownWithAction(action: () => Promise, originalIsError?: boolean, originalError?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n } else {\n doTheRest();\n }\n\n function doTheRest(): null {\n uponPromise(\n action(),\n () => finalize(originalIsError, originalError),\n newError => finalize(true, newError)\n );\n return null;\n }\n }\n\n function shutdown(isError?: boolean, error?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n } else {\n finalize(isError, error);\n }\n }\n\n function finalize(isError?: boolean, error?: any): null {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n } else {\n resolve(undefined);\n }\n\n return null;\n }\n });\n}\n","import type { QueuingStrategySizeCallback } from '../queuing-strategy';\nimport assert from '../../stub/assert';\nimport { DequeueValue, EnqueueValueWithSize, type QueuePair, ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n type ReadRequest\n} from './default-reader';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsReadableStreamLocked, ReadableStream, ReadableStreamClose, ReadableStreamError } from '../readable-stream';\nimport type { ValidatedUnderlyingSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\n\n/**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableStreamDefaultController {\n /** @internal */\n _controlledReadableStream!: ReadableStream;\n /** @internal */\n _queue!: SimpleQueue>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('close');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n\n ReadableStreamDefaultControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the controlled readable stream.\n */\n enqueue(chunk: R): void;\n enqueue(chunk: R = undefined!): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n ReadableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest): void {\n const stream = this._controlledReadableStream;\n\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n } else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n\n readRequest._chunkSteps(chunk);\n } else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n // Do nothing.\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\nsetFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableStreamDefaultController.\n\nfunction IsReadableStreamDefaultController(x: any): x is ReadableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultController;\n}\n\nfunction ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController): void {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController): boolean {\n const stream = controller._controlledReadableStream;\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\n// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n\nexport function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n controller._closeRequested = true;\n\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n}\n\nexport function ReadableStreamDefaultControllerEnqueue(\n controller: ReadableStreamDefaultController,\n chunk: R\n): void {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n } else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController, e: any) {\n const stream = controller._controlledReadableStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ResetQueue(controller);\n\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableStreamDefaultControllerGetDesiredSize(\n controller: ReadableStreamDefaultController\n): number | null {\n const state = controller._controlledReadableStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\n// This is used in the implementation of TransformStream.\nexport function ReadableStreamDefaultControllerHasBackpressure(\n controller: ReadableStreamDefaultController\n): boolean {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n\n return true;\n}\n\nexport function ReadableStreamDefaultControllerCanCloseOrEnqueue(\n controller: ReadableStreamDefaultController\n): boolean {\n const state = controller._controlledReadableStream._state;\n\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n\n return false;\n}\n\nexport function SetUpReadableStreamDefaultController(stream: ReadableStream,\n controller: ReadableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(stream._readableStreamController === undefined);\n\n controller._controlledReadableStream = stream;\n\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n stream: ReadableStream,\n underlyingSource: ValidatedUnderlyingSource,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback\n) {\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// Helper functions for the ReadableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n}\n","import {\n CreateReadableByteStream,\n CreateReadableStream,\n type DefaultReadableStream,\n IsReadableStream,\n type ReadableByteStream,\n ReadableStream,\n ReadableStreamCancel,\n type ReadableStreamReader\n} from '../readable-stream';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadRequest\n} from './default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReaderRead,\n type ReadIntoRequest\n} from './byob-reader';\nimport assert from '../../stub/assert';\nimport { newPromise, promiseResolvedWith, queueMicrotask, uponRejection } from '../helpers/webidl';\nimport {\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError\n} from './default-controller';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamControllerClose,\n ReadableByteStreamControllerEnqueue,\n ReadableByteStreamControllerError,\n ReadableByteStreamControllerGetBYOBRequest,\n ReadableByteStreamControllerRespond,\n ReadableByteStreamControllerRespondWithNewView\n} from './byte-stream-controller';\nimport { CreateArrayFromList } from '../abstract-ops/ecmascript';\nimport { CloneAsUint8Array } from '../abstract-ops/miscellaneous';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function ReadableStreamTee(stream: ReadableStream,\n cloneForBranch2: boolean): [ReadableStream, ReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream as unknown as ReadableByteStream) as\n unknown as [ReadableStream, ReadableStream];\n }\n return ReadableStreamDefaultTee(stream, cloneForBranch2);\n}\n\nexport function ReadableStreamDefaultTee(\n stream: ReadableStream,\n cloneForBranch2: boolean\n): [DefaultReadableStream, DefaultReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n\n const reader = AcquireReadableStreamDefaultReader(stream);\n\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: DefaultReadableStream;\n let branch2: DefaultReadableStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function pullAlgorithm(): Promise {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm() {\n // do nothing\n }\n\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n\n uponRejection(reader._closedPromise, (r: any) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n\n return [branch1, branch2];\n}\n\nexport function ReadableByteStreamTee(stream: ReadableByteStream): [ReadableByteStream, ReadableByteStream] {\n assert(IsReadableStream(stream));\n assert(IsReadableByteStreamController(stream._readableStreamController));\n\n let reader: ReadableStreamReader> = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: ReadableByteStream;\n let branch2: ReadableByteStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function forwardReaderError(thisReader: ReadableStreamReader>) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n assert(reader._readIntoRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n\n const readRequest: ReadRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n\n function pullWithBYOBReader(view: NonShared, forBranch2: boolean) {\n if (IsReadableStreamDefaultReader>(reader)) {\n assert(reader._readRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n\n const readIntoRequest: ReadIntoRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n } else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n\n if (chunk !== undefined) {\n assert(chunk.byteLength === 0);\n\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n\n function pull1Algorithm(): Promise {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, false);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function pull2Algorithm(): Promise {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, true);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm(): void {\n return;\n }\n\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n\n forwardReaderError(reader);\n\n return [branch1, branch2];\n}\n","import { typeIsObject } from '../helpers/miscellaneous';\nimport type { ReadableStreamDefaultReadResult } from './default-reader';\n\n/**\n * A common interface for a `ReadadableStream` implementation.\n *\n * @public\n */\nexport interface ReadableStreamLike {\n readonly locked: boolean;\n\n getReader(): ReadableStreamDefaultReaderLike;\n}\n\n/**\n * A common interface for a `ReadableStreamDefaultReader` implementation.\n *\n * @public\n */\nexport interface ReadableStreamDefaultReaderLike {\n readonly closed: Promise;\n\n cancel(reason?: any): Promise;\n\n read(): Promise>;\n\n releaseLock(): void;\n}\n\nexport function isReadableStreamLike(stream: unknown): stream is ReadableStreamLike {\n return typeIsObject(stream) && typeof (stream as ReadableStreamLike).getReader !== 'undefined';\n}\n","import { CreateReadableStream, type DefaultReadableStream } from '../readable-stream';\nimport {\n isReadableStreamLike,\n type ReadableStreamDefaultReaderLike,\n type ReadableStreamLike\n} from './readable-stream-like';\nimport { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue } from './default-controller';\nimport { GetIterator, GetMethod, IteratorComplete, IteratorNext, IteratorValue } from '../abstract-ops/ecmascript';\nimport { promiseRejectedWith, promiseResolvedWith, reflectCall, transformPromiseWith } from '../helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport { noop } from '../../utils';\n\nexport function ReadableStreamFrom(\n source: Iterable | AsyncIterable | ReadableStreamLike\n): DefaultReadableStream {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n}\n\nexport function ReadableStreamFromIterable(asyncIterable: Iterable | AsyncIterable): DefaultReadableStream {\n let stream: DefaultReadableStream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n const iterator = iteratorRecord.iterator;\n let returnMethod: (typeof iterator)['return'] | undefined;\n try {\n returnMethod = GetMethod(iterator, 'return');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult: IteratorResult | Promise>;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n\nexport function ReadableStreamFromDefaultReader(\n reader: ReadableStreamDefaultReaderLike\n): DefaultReadableStream {\n let stream: DefaultReadableStream;\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let readPromise;\n try {\n readPromise = reader.read();\n } catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n } catch (e) {\n return promiseRejectedWith(e);\n }\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n","import { assertDictionary, assertFunction, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamController,\n UnderlyingByteSource,\n UnderlyingDefaultOrByteSource,\n UnderlyingDefaultOrByteSourcePullCallback,\n UnderlyingDefaultOrByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n ValidatedUnderlyingDefaultOrByteSource\n} from '../readable-stream/underlying-source';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\n\nexport function convertUnderlyingDefaultOrByteSource(\n source: UnderlyingSource | UnderlyingByteSource | null,\n context: string\n): ValidatedUnderlyingDefaultOrByteSource {\n assertDictionary(source, context);\n const original = source as (UnderlyingDefaultOrByteSource | null);\n const autoAllocateChunkSize = original?.autoAllocateChunkSize;\n const cancel = original?.cancel;\n const pull = original?.pull;\n const start = original?.start;\n const type = original?.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(\n autoAllocateChunkSize,\n `${context} has member 'autoAllocateChunkSize' that`\n ),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original!, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original!, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n}\n\nfunction convertUnderlyingSourceCancelCallback(\n fn: UnderlyingSourceCancelCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSourcePullCallback(\n fn: UnderlyingDefaultOrByteSourcePullCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (controller: ReadableStreamController) => Promise {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSourceStartCallback(\n fn: UnderlyingDefaultOrByteSourceStartCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): UnderlyingDefaultOrByteSourceStartCallback {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertReadableStreamType(type: string, context: string): 'bytes' {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n}\n","import { assertDictionary } from './basic';\nimport type {\n ReadableStreamIteratorOptions,\n ValidatedReadableStreamIteratorOptions\n} from '../readable-stream/iterator-options';\n\nexport function convertIteratorOptions(options: ReadableStreamIteratorOptions | null | undefined,\n context: string): ValidatedReadableStreamIteratorOptions {\n assertDictionary(options, context);\n const preventCancel = options?.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n}\n","import { assertDictionary } from './basic';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from '../readable-stream/pipe-options';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\n\nexport function convertPipeOptions(options: StreamPipeOptions | null | undefined,\n context: string): ValidatedStreamPipeOptions {\n assertDictionary(options, context);\n const preventAbort = options?.preventAbort;\n const preventCancel = options?.preventCancel;\n const preventClose = options?.preventClose;\n const signal = options?.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n}\n\nfunction assertAbortSignal(signal: unknown, context: string): asserts signal is AbortSignal {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n}\n","import { assertDictionary, assertRequiredField } from './basic';\nimport { ReadableStream } from '../readable-stream';\nimport { WritableStream } from '../writable-stream';\nimport { assertReadableStream } from './readable-stream';\nimport { assertWritableStream } from './writable-stream';\n\nexport function convertReadableWritablePair(\n pair: { readable: RS; writable: WS } | null | undefined,\n context: string\n): { readable: RS; writable: WS } {\n assertDictionary(pair, context);\n\n const readable = pair?.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n\n const writable = pair?.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n\n return { readable, writable };\n}\n","import assert from '../stub/assert';\nimport {\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith\n} from './helpers/webidl';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { AcquireReadableStreamAsyncIterator, type ReadableStreamAsyncIterator } from './readable-stream/async-iterator';\nimport { defaultReaderClosedPromiseReject, defaultReaderClosedPromiseResolve } from './readable-stream/generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderErrorReadRequests,\n type ReadableStreamDefaultReadResult\n} from './readable-stream/default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBReaderErrorReadIntoRequests,\n type ReadableStreamBYOBReadResult\n} from './readable-stream/byob-reader';\nimport { ReadableStreamPipeTo } from './readable-stream/pipe';\nimport { ReadableStreamTee } from './readable-stream/tee';\nimport { ReadableStreamFrom } from './readable-stream/from';\nimport { IsWritableStream, IsWritableStreamLocked, WritableStream } from './writable-stream';\nimport { SimpleQueue } from './simple-queue';\nimport {\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n SetUpReadableByteStreamController,\n SetUpReadableByteStreamControllerFromUnderlyingSource\n} from './readable-stream/byte-stream-controller';\nimport {\n ReadableStreamDefaultController,\n SetUpReadableStreamDefaultController,\n SetUpReadableStreamDefaultControllerFromUnderlyingSource\n} from './readable-stream/default-controller';\nimport type {\n UnderlyingByteSource,\n UnderlyingByteSourcePullCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceStartCallback\n} from './readable-stream/underlying-source';\nimport { noop } from '../utils';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { CreateArrayFromList, SymbolAsyncIterator } from './abstract-ops/ecmascript';\nimport { CancelSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertUnderlyingDefaultOrByteSource } from './validators/underlying-source';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions\n} from './readable-stream/reader-options';\nimport { convertReaderOptions } from './validators/reader-options';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from './readable-stream/pipe-options';\nimport type { ReadableStreamIteratorOptions } from './readable-stream/iterator-options';\nimport { convertIteratorOptions } from './validators/iterator-options';\nimport { convertPipeOptions } from './validators/pipe-options';\nimport type { ReadableWritablePair } from './readable-stream/readable-writable-pair';\nimport { convertReadableWritablePair } from './validators/readable-writable-pair';\nimport type { ReadableStreamDefaultReaderLike, ReadableStreamLike } from './readable-stream/readable-stream-like';\nimport type { NonShared } from './helpers/array-buffer-view';\n\nexport type DefaultReadableStream = ReadableStream & {\n _readableStreamController: ReadableStreamDefaultController\n};\n\nexport type ReadableByteStream = ReadableStream> & {\n _readableStreamController: ReadableByteStreamController\n};\n\ntype ReadableStreamState = 'readable' | 'closed' | 'errored';\n\n/**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\nexport class ReadableStream implements AsyncIterable {\n /** @internal */\n _state!: ReadableStreamState;\n /** @internal */\n _reader: ReadableStreamReader | undefined;\n /** @internal */\n _storedError: any;\n /** @internal */\n _disturbed!: boolean;\n /** @internal */\n _readableStreamController!: ReadableStreamDefaultController | ReadableByteStreamController;\n\n constructor(underlyingSource: UnderlyingByteSource, strategy?: { highWaterMark?: number; size?: undefined });\n constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSource: UnderlyingSource | UnderlyingByteSource | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n } else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n\n InitializeReadableStream(this);\n\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(\n this as unknown as ReadableByteStream,\n underlyingSource,\n highWaterMark\n );\n } else {\n assert(underlyingSource.type === undefined);\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n this,\n underlyingSource,\n highWaterMark,\n sizeAlgorithm\n );\n }\n }\n\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked(): boolean {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsReadableStreamLocked(this);\n }\n\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('cancel'));\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n\n return ReadableStreamCancel(this, reason);\n }\n\n /**\n * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader.\n *\n * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams,\n * i.e. streams which were constructed specifically with the ability to handle \"bring your own buffer\" reading.\n * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its\n * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise\n * control over allocation.\n */\n getReader({ mode }: { mode: 'byob' }): ReadableStreamBYOBReader;\n /**\n * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader.\n * While the stream is locked, no other reader can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to consume a stream\n * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours\n * or cancel the stream, which would interfere with your abstraction.\n */\n getReader(): ReadableStreamDefaultReader;\n getReader(\n rawOptions: ReadableStreamGetReaderOptions | null | undefined = undefined\n ): ReadableStreamDefaultReader | ReadableStreamBYOBReader {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('getReader');\n }\n\n const options = convertReaderOptions(rawOptions, 'First parameter');\n\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n\n assert(options.mode === 'byob');\n return AcquireReadableStreamBYOBReader(this as unknown as ReadableByteStream);\n }\n\n /**\n * Provides a convenient, chainable way of piping this readable stream through a transform stream\n * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream\n * into the writable side of the supplied pair, and returns the readable side for further use.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeThrough(\n transform: { readable: RS; writable: WritableStream },\n options?: StreamPipeOptions\n ): RS;\n pipeThrough(\n rawTransform: { readable: RS; writable: WritableStream } | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}\n ): RS {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n\n const promise = ReadableStreamPipeTo(\n this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n\n setPromiseIsHandledToTrue(promise);\n\n return transform.readable;\n }\n\n /**\n * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under\n * various error conditions can be customized with a number of passed options. It returns a promise that fulfills\n * when the piping process completes successfully, or rejects if any errors were encountered.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise;\n pipeTo(destination: WritableStream | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('pipeTo'));\n }\n\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(\n new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)\n );\n }\n\n let options: ValidatedStreamPipeOptions;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')\n );\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')\n );\n }\n\n return ReadableStreamPipeTo(\n this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n }\n\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee(): [ReadableStream, ReadableStream] {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('tee');\n }\n\n const branches = ReadableStreamTee(this, false);\n return CreateArrayFromList(branches);\n }\n\n /**\n * Asynchronously iterates over the chunks in the stream's internal queue.\n *\n * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader.\n * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method\n * is called, e.g. by breaking out of the loop.\n *\n * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also\n * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing\n * `true` for the `preventCancel` option.\n */\n values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n values(rawOptions: ReadableStreamIteratorOptions | null | undefined = undefined): ReadableStreamAsyncIterator {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('values');\n }\n\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n\n /**\n * {@inheritDoc ReadableStream.values}\n */\n [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n\n [SymbolAsyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator {\n // Stub implementation, overridden below\n return this.values(options);\n }\n\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream {\n return ReadableStreamFrom(asyncIterable);\n }\n}\n\nObject.defineProperties(ReadableStream, {\n from: { enumerable: true }\n});\nObject.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(ReadableStream.from, 'from');\nsetFunctionName(ReadableStream.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStream.prototype.getReader, 'getReader');\nsetFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\nsetFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\nsetFunctionName(ReadableStream.prototype.tee, 'tee');\nsetFunctionName(ReadableStream.prototype.values, 'values');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n}\nObject.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n});\n\nexport type {\n ReadableStreamAsyncIterator,\n ReadableStreamDefaultReadResult,\n ReadableStreamBYOBReadResult,\n ReadableStreamBYOBReaderReadOptions,\n UnderlyingByteSource,\n UnderlyingSource,\n UnderlyingSourceStartCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceCancelCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingByteSourcePullCallback,\n StreamPipeOptions,\n ReadableWritablePair,\n ReadableStreamIteratorOptions,\n ReadableStreamLike,\n ReadableStreamDefaultReaderLike\n};\n\n// Abstract operations for the ReadableStream.\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1\n): DefaultReadableStream {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: DefaultReadableStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n\n return stream;\n}\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableByteStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise\n): ReadableByteStream {\n const stream: ReadableByteStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n\n return stream;\n}\n\nfunction InitializeReadableStream(stream: ReadableStream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n}\n\nexport function IsReadableStream(x: unknown): x is ReadableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStream;\n}\n\nexport function IsReadableStreamDisturbed(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n return stream._disturbed;\n}\n\nexport function IsReadableStreamLocked(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n if (stream._reader === undefined) {\n return false;\n }\n\n return true;\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamCancel(stream: ReadableStream, reason: any): Promise {\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n ReadableStreamClose(stream);\n\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n}\n\nexport function ReadableStreamClose(stream: ReadableStream): void {\n assert(stream._state === 'readable');\n\n stream._state = 'closed';\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseResolve(reader);\n\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n}\n\nexport function ReadableStreamError(stream: ReadableStream, e: any): void {\n assert(IsReadableStream(stream));\n assert(stream._state === 'readable');\n\n stream._state = 'errored';\n stream._storedError = e;\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseReject(reader, e);\n\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n } else {\n assert(IsReadableStreamBYOBReader(reader));\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n}\n\n// Readers\n\nexport type ReadableStreamReader = ReadableStreamDefaultReader | ReadableStreamBYOBReader;\n\nexport {\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader\n};\n\n// Controllers\n\nexport {\n ReadableStreamDefaultController,\n ReadableStreamBYOBRequest,\n ReadableByteStreamController\n};\n\n// Helper functions for the ReadableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n}\n","import type { QueuingStrategyInit } from '../queuing-strategy';\nimport { assertDictionary, assertRequiredField, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategyInit(init: QueuingStrategyInit | null | undefined,\n context: string): QueuingStrategyInit {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst byteLengthSizeFunction = (chunk: ArrayBufferView): number => {\n return chunk.byteLength;\n};\nsetFunctionName(byteLengthSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\nexport default class ByteLengthQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _byteLengthQueuingStrategyHighWaterMark: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size(): (chunk: ArrayBufferView) => number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n}\n\nObject.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the ByteLengthQueuingStrategy.\n\nfunction byteLengthBrandCheckException(name: string): TypeError {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n}\n\nexport function IsByteLengthQueuingStrategy(x: any): x is ByteLengthQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof ByteLengthQueuingStrategy;\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst countSizeFunction = (): 1 => {\n return 1;\n};\nsetFunctionName(countSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\nexport default class CountQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _countQueuingStrategyHighWaterMark!: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size(): (chunk: any) => 1 {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n}\n\nObject.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the CountQueuingStrategy.\n\nfunction countBrandCheckException(name: string): TypeError {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n}\n\nexport function IsCountQueuingStrategy(x: any): x is CountQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof CountQueuingStrategy;\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from '../transform-stream/transformer';\nimport { TransformStreamDefaultController } from '../transform-stream';\n\nexport function convertTransformer(original: Transformer | null,\n context: string): ValidatedTransformer {\n assertDictionary(original, context);\n const cancel = original?.cancel;\n const flush = original?.flush;\n const readableType = original?.readableType;\n const start = original?.start;\n const transform = original?.transform;\n const writableType = original?.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original!, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original!, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original!, `${context} has member 'transform' that`),\n writableType\n };\n}\n\nfunction convertTransformerFlushCallback(\n fn: TransformerFlushCallback,\n original: Transformer,\n context: string\n): (controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertTransformerStartCallback(\n fn: TransformerStartCallback,\n original: Transformer,\n context: string\n): TransformerStartCallback {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertTransformerTransformCallback(\n fn: TransformerTransformCallback,\n original: Transformer,\n context: string\n): (chunk: I, controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: I, controller: TransformStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n\nfunction convertTransformerCancelCallback(\n fn: TransformerCancelCallback,\n original: Transformer,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith,\n uponPromise\n} from './helpers/webidl';\nimport { CreateReadableStream, type DefaultReadableStream, ReadableStream } from './readable-stream';\nimport {\n ReadableStreamDefaultControllerCanCloseOrEnqueue,\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError,\n ReadableStreamDefaultControllerGetDesiredSize,\n ReadableStreamDefaultControllerHasBackpressure\n} from './readable-stream/default-controller';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { CreateWritableStream, WritableStream, WritableStreamDefaultControllerErrorIfNeeded } from './writable-stream';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from './transform-stream/transformer';\nimport { convertTransformer } from './validators/transformer';\n\n// Class TransformStream\n\n/**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\nexport class TransformStream {\n /** @internal */\n _writable!: WritableStream;\n /** @internal */\n _readable!: DefaultReadableStream;\n /** @internal */\n _backpressure!: boolean;\n /** @internal */\n _backpressureChangePromise!: Promise;\n /** @internal */\n _backpressureChangePromise_resolve!: () => void;\n /** @internal */\n _transformStreamController!: TransformStreamDefaultController;\n\n constructor(\n transformer?: Transformer,\n writableStrategy?: QueuingStrategy,\n readableStrategy?: QueuingStrategy\n );\n constructor(rawTransformer: Transformer | null | undefined = {},\n rawWritableStrategy: QueuingStrategy | null | undefined = {},\n rawReadableStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(\n this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm\n );\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n } else {\n startPromise_resolve(undefined);\n }\n }\n\n /**\n * The readable side of the transform stream.\n */\n get readable(): ReadableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n\n return this._readable;\n }\n\n /**\n * The writable side of the transform stream.\n */\n get writable(): WritableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n\n return this._writable;\n }\n}\n\nObject.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n}\n\nexport type {\n Transformer,\n TransformerCancelCallback,\n TransformerStartCallback,\n TransformerFlushCallback,\n TransformerTransformCallback\n};\n\n// Transform Stream Abstract Operations\n\nexport function CreateTransformStream(startAlgorithm: () => void | PromiseLike,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n writableHighWaterMark = 1,\n writableSizeAlgorithm: QueuingStrategySizeCallback = () => 1,\n readableHighWaterMark = 0,\n readableSizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(writableHighWaterMark));\n assert(IsNonNegativeNumber(readableHighWaterMark));\n\n const stream: TransformStream = Object.create(TransformStream.prototype);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n\n const startResult = startAlgorithm();\n startPromise_resolve(startResult);\n return stream;\n}\n\nfunction InitializeTransformStream(stream: TransformStream,\n startPromise: Promise,\n writableHighWaterMark: number,\n writableSizeAlgorithm: QueuingStrategySizeCallback,\n readableHighWaterMark: number,\n readableSizeAlgorithm: QueuingStrategySizeCallback) {\n function startAlgorithm(): Promise {\n return startPromise;\n }\n\n function writeAlgorithm(chunk: I): Promise {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n\n function abortAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n\n function closeAlgorithm(): Promise {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm,\n writableHighWaterMark, writableSizeAlgorithm);\n\n function pullAlgorithm(): Promise {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n\n function cancelAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined!;\n stream._backpressureChangePromise = undefined!;\n stream._backpressureChangePromise_resolve = undefined!;\n TransformStreamSetBackpressure(stream, true);\n\n stream._transformStreamController = undefined!;\n}\n\nfunction IsTransformStream(x: unknown): x is TransformStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n\n return x instanceof TransformStream;\n}\n\n// This is a no-op if both sides are already errored.\nfunction TransformStreamError(stream: TransformStream, e: any) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n}\n\nfunction TransformStreamErrorWritableAndUnblockWrite(stream: TransformStream, e: any) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n}\n\nfunction TransformStreamUnblockWrite(stream: TransformStream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure()\n // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time\n // _backpressure is set.\n TransformStreamSetBackpressure(stream, false);\n }\n}\n\nfunction TransformStreamSetBackpressure(stream: TransformStream, backpressure: boolean) {\n // Passes also when called during construction.\n assert(stream._backpressure !== backpressure);\n\n if (stream._backpressureChangePromise !== undefined) {\n stream._backpressureChangePromise_resolve();\n }\n\n stream._backpressureChangePromise = newPromise(resolve => {\n stream._backpressureChangePromise_resolve = resolve;\n });\n\n stream._backpressure = backpressure;\n}\n\n// Class TransformStreamDefaultController\n\n/**\n * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}.\n *\n * @public\n */\nexport class TransformStreamDefaultController {\n /** @internal */\n _controlledTransformStream: TransformStream;\n /** @internal */\n _finishPromise: Promise | undefined;\n /** @internal */\n _finishPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _finishPromise_reject?: (reason: any) => void;\n /** @internal */\n _transformAlgorithm: (chunk: any) => Promise;\n /** @internal */\n _flushAlgorithm: () => Promise;\n /** @internal */\n _cancelAlgorithm: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full.\n */\n get desiredSize(): number | null {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n const readableController = this._controlledTransformStream._readable._readableStreamController;\n return ReadableStreamDefaultControllerGetDesiredSize(readableController);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the readable side of the controlled transform stream.\n */\n enqueue(chunk: O): void;\n enqueue(chunk: O = undefined!): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n TransformStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors both the readable side and the writable side of the controlled transform stream, making all future\n * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.\n */\n error(reason: any = undefined): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n TransformStreamDefaultControllerError(this, reason);\n }\n\n /**\n * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate(): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n\n TransformStreamDefaultControllerTerminate(this);\n }\n}\n\nObject.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(TransformStreamDefaultController.prototype.error, 'error');\nsetFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n}\n\n// Transform Stream Default Controller Abstract Operations\n\nfunction IsTransformStreamDefaultController(x: any): x is TransformStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n\n return x instanceof TransformStreamDefaultController;\n}\n\nfunction SetUpTransformStreamDefaultController(stream: TransformStream,\n controller: TransformStreamDefaultController,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise) {\n assert(IsTransformStream(stream));\n assert(stream._transformStreamController === undefined);\n\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nfunction SetUpTransformStreamDefaultControllerFromTransformer(stream: TransformStream,\n transformer: ValidatedTransformer) {\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n let transformAlgorithm: (chunk: I) => Promise;\n let flushAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform!(chunk, controller);\n } else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk as unknown as O);\n return promiseResolvedWith(undefined);\n } catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush!(controller);\n } else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n}\n\nfunction TransformStreamDefaultControllerClearAlgorithms(controller: TransformStreamDefaultController) {\n controller._transformAlgorithm = undefined!;\n controller._flushAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\nfunction TransformStreamDefaultControllerEnqueue(controller: TransformStreamDefaultController, chunk: O) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n\n // We throttle transform invocations based on the backpressure of the ReadableStream, but we still\n // accept TransformStreamDefaultControllerEnqueue() calls.\n\n try {\n ReadableStreamDefaultControllerEnqueue(readableController, chunk);\n } catch (e) {\n // This happens when readableStrategy.size() throws.\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n\n throw stream._readable._storedError;\n }\n\n const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);\n if (backpressure !== stream._backpressure) {\n assert(backpressure);\n TransformStreamSetBackpressure(stream, true);\n }\n}\n\nfunction TransformStreamDefaultControllerError(controller: TransformStreamDefaultController, e: any) {\n TransformStreamError(controller._controlledTransformStream, e);\n}\n\nfunction TransformStreamDefaultControllerPerformTransform(controller: TransformStreamDefaultController,\n chunk: I) {\n const transformPromise = controller._transformAlgorithm(chunk);\n return transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n}\n\nfunction TransformStreamDefaultControllerTerminate(controller: TransformStreamDefaultController) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n\n ReadableStreamDefaultControllerClose(readableController);\n\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n}\n\n// TransformStreamDefaultSink Algorithms\n\nfunction TransformStreamDefaultSinkWriteAlgorithm(stream: TransformStream, chunk: I): Promise {\n assert(stream._writable._state === 'writable');\n\n const controller = stream._transformStreamController;\n\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n assert(backpressureChangePromise !== undefined);\n return transformPromiseWith(backpressureChangePromise, () => {\n const writable = stream._writable;\n const state = writable._state;\n if (state === 'erroring') {\n throw writable._storedError;\n }\n assert(state === 'writable');\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n });\n }\n\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n}\n\nfunction TransformStreamDefaultSinkAbortAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally,\n // we don't run the _cancelAlgorithm again.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerError(readable._readableStreamController, reason);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\nfunction TransformStreamDefaultSinkCloseAlgorithm(stream: TransformStream): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// TransformStreamDefaultSource Algorithms\n\nfunction TransformStreamDefaultSourcePullAlgorithm(stream: TransformStream): Promise {\n // Invariant. Enforced by the promises returned by start() and pull().\n assert(stream._backpressure);\n\n assert(stream._backpressureChangePromise !== undefined);\n\n TransformStreamSetBackpressure(stream, false);\n\n // Prevent the next pull() call until there is backpressure.\n return stream._backpressureChangePromise;\n}\n\nfunction TransformStreamDefaultSourceCancelAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._writable cannot change after construction, so caching it across a call to user code is safe.\n const writable = stream._writable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or\n // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the\n // _flushAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (writable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, writable._storedError);\n } else {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// Helper functions for the TransformStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n}\n\nexport function defaultControllerFinishPromiseResolve(controller: TransformStreamDefaultController) {\n if (controller._finishPromise_resolve === undefined) {\n return;\n }\n\n controller._finishPromise_resolve();\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nexport function defaultControllerFinishPromiseReject(controller: TransformStreamDefaultController, reason: any) {\n if (controller._finishPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(controller._finishPromise!);\n controller._finishPromise_reject(reason);\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\n// Helper functions for the TransformStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStream.prototype.${name} can only be used on a TransformStream`);\n}\n","import {\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n ReadableByteStreamController,\n ReadableStream,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultController,\n ReadableStreamDefaultReader,\n TransformStream,\n TransformStreamDefaultController,\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter\n} from './ponyfill';\nimport { globals } from './globals';\n\n// Export\nexport * from './ponyfill';\n\nconst exports = {\n ReadableStream,\n ReadableStreamDefaultController,\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader,\n\n WritableStream,\n WritableStreamDefaultController,\n WritableStreamDefaultWriter,\n\n ByteLengthQueuingStrategy,\n CountQueuingStrategy,\n\n TransformStream,\n TransformStreamDefaultController\n};\n\n// Add classes to global scope\nif (typeof 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\ No newline at end of file diff --git a/node_modules/web-streams-polyfill/dist/ponyfill.es2018.js b/node_modules/web-streams-polyfill/dist/ponyfill.es2018.js new file mode 100644 index 00000000..75ddde26 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/ponyfill.es2018.js @@ -0,0 +1,4737 @@ +/** + * @license + * web-streams-polyfill v3.3.3 + * Copyright 2024 Mattias Buelens, Diwank Singh Tomer and other contributors. + * This code is released under the MIT license. + * SPDX-License-Identifier: MIT + */ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : + typeof define === 'function' && define.amd ? define(['exports'], factory) : + (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.WebStreamsPolyfill = {})); +})(this, (function (exports) { 'use strict'; + + function noop() { + return undefined; + } + + function typeIsObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; + } + const rethrowAssertionErrorRejection = noop; + function setFunctionName(fn, name) { + try { + Object.defineProperty(fn, 'name', { + value: name, + configurable: true + }); + } + catch (_a) { + // This property is non-configurable in older browsers, so ignore if this throws. + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility + } + } + + const originalPromise = Promise; + const originalPromiseThen = Promise.prototype.then; + const originalPromiseReject = Promise.reject.bind(originalPromise); + // https://webidl.spec.whatwg.org/#a-new-promise + function newPromise(executor) { + return new originalPromise(executor); + } + // https://webidl.spec.whatwg.org/#a-promise-resolved-with + function promiseResolvedWith(value) { + return newPromise(resolve => resolve(value)); + } + // https://webidl.spec.whatwg.org/#a-promise-rejected-with + function promiseRejectedWith(reason) { + return originalPromiseReject(reason); + } + function PerformPromiseThen(promise, onFulfilled, onRejected) { + // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an + // approximation. + return originalPromiseThen.call(promise, onFulfilled, onRejected); + } + // Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned + // from that handler. To prevent this, return null instead of void from all handlers. + // http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it + function uponPromise(promise, onFulfilled, onRejected) { + PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection); + } + function uponFulfillment(promise, onFulfilled) { + uponPromise(promise, onFulfilled); + } + function uponRejection(promise, onRejected) { + uponPromise(promise, undefined, onRejected); + } + function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) { + return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler); + } + function setPromiseIsHandledToTrue(promise) { + PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection); + } + let _queueMicrotask = callback => { + if (typeof queueMicrotask === 'function') { + _queueMicrotask = queueMicrotask; + } + else { + const resolvedPromise = promiseResolvedWith(undefined); + _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb); + } + return _queueMicrotask(callback); + }; + function reflectCall(F, V, args) { + if (typeof F !== 'function') { + throw new TypeError('Argument is not a function'); + } + return Function.prototype.apply.call(F, V, args); + } + function promiseCall(F, V, args) { + try { + return promiseResolvedWith(reflectCall(F, V, args)); + } + catch (value) { + return promiseRejectedWith(value); + } + } + + // Original from Chromium + // https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js + const QUEUE_MAX_ARRAY_SIZE = 16384; + /** + * Simple queue structure. + * + * Avoids scalability issues with using a packed array directly by using + * multiple arrays in a linked list and keeping the array size bounded. + */ + class SimpleQueue { + constructor() { + this._cursor = 0; + this._size = 0; + // _front and _back are always defined. + this._front = { + _elements: [], + _next: undefined + }; + this._back = this._front; + // The cursor is used to avoid calling Array.shift(). + // It contains the index of the front element of the array inside the + // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE). + this._cursor = 0; + // When there is only one node, size === elements.length - cursor. + this._size = 0; + } + get length() { + return this._size; + } + // For exception safety, this method is structured in order: + // 1. Read state + // 2. Calculate required state mutations + // 3. Perform state mutations + push(element) { + const oldBack = this._back; + let newBack = oldBack; + if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) { + newBack = { + _elements: [], + _next: undefined + }; + } + // push() is the mutation most likely to throw an exception, so it + // goes first. + oldBack._elements.push(element); + if (newBack !== oldBack) { + this._back = newBack; + oldBack._next = newBack; + } + ++this._size; + } + // Like push(), shift() follows the read -> calculate -> mutate pattern for + // exception safety. + shift() { // must not be called on an empty queue + const oldFront = this._front; + let newFront = oldFront; + const oldCursor = this._cursor; + let newCursor = oldCursor + 1; + const elements = oldFront._elements; + const element = elements[oldCursor]; + if (newCursor === QUEUE_MAX_ARRAY_SIZE) { + newFront = oldFront._next; + newCursor = 0; + } + // No mutations before this point. + --this._size; + this._cursor = newCursor; + if (oldFront !== newFront) { + this._front = newFront; + } + // Permit shifted element to be garbage collected. + elements[oldCursor] = undefined; + return element; + } + // The tricky thing about forEach() is that it can be called + // re-entrantly. The queue may be mutated inside the callback. It is easy to + // see that push() within the callback has no negative effects since the end + // of the queue is checked for on every iteration. If shift() is called + // repeatedly within the callback then the next iteration may return an + // element that has been removed. In this case the callback will be called + // with undefined values until we either "catch up" with elements that still + // exist or reach the back of the queue. + forEach(callback) { + let i = this._cursor; + let node = this._front; + let elements = node._elements; + while (i !== elements.length || node._next !== undefined) { + if (i === elements.length) { + node = node._next; + elements = node._elements; + i = 0; + if (elements.length === 0) { + break; + } + } + callback(elements[i]); + ++i; + } + } + // Return the element that would be returned if shift() was called now, + // without modifying the queue. + peek() { // must not be called on an empty queue + const front = this._front; + const cursor = this._cursor; + return front._elements[cursor]; + } + } + + const AbortSteps = Symbol('[[AbortSteps]]'); + const ErrorSteps = Symbol('[[ErrorSteps]]'); + const CancelSteps = Symbol('[[CancelSteps]]'); + const PullSteps = Symbol('[[PullSteps]]'); + const ReleaseSteps = Symbol('[[ReleaseSteps]]'); + + function ReadableStreamReaderGenericInitialize(reader, stream) { + reader._ownerReadableStream = stream; + stream._reader = reader; + if (stream._state === 'readable') { + defaultReaderClosedPromiseInitialize(reader); + } + else if (stream._state === 'closed') { + defaultReaderClosedPromiseInitializeAsResolved(reader); + } + else { + defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError); + } + } + // A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state + // check. + function ReadableStreamReaderGenericCancel(reader, reason) { + const stream = reader._ownerReadableStream; + return ReadableStreamCancel(stream, reason); + } + function ReadableStreamReaderGenericRelease(reader) { + const stream = reader._ownerReadableStream; + if (stream._state === 'readable') { + defaultReaderClosedPromiseReject(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + else { + defaultReaderClosedPromiseResetToRejected(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + stream._readableStreamController[ReleaseSteps](); + stream._reader = undefined; + reader._ownerReadableStream = undefined; + } + // Helper functions for the readers. + function readerLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released reader'); + } + // Helper functions for the ReadableStreamDefaultReader. + function defaultReaderClosedPromiseInitialize(reader) { + reader._closedPromise = newPromise((resolve, reject) => { + reader._closedPromise_resolve = resolve; + reader._closedPromise_reject = reject; + }); + } + function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseReject(reader, reason); + } + function defaultReaderClosedPromiseInitializeAsResolved(reader) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseResolve(reader); + } + function defaultReaderClosedPromiseReject(reader, reason) { + if (reader._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(reader._closedPromise); + reader._closedPromise_reject(reason); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; + } + function defaultReaderClosedPromiseResetToRejected(reader, reason) { + defaultReaderClosedPromiseInitializeAsRejected(reader, reason); + } + function defaultReaderClosedPromiseResolve(reader) { + if (reader._closedPromise_resolve === undefined) { + return; + } + reader._closedPromise_resolve(undefined); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; + } + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill + const NumberIsFinite = Number.isFinite || function (x) { + return typeof x === 'number' && isFinite(x); + }; + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill + const MathTrunc = Math.trunc || function (v) { + return v < 0 ? Math.ceil(v) : Math.floor(v); + }; + + // https://heycam.github.io/webidl/#idl-dictionaries + function isDictionary(x) { + return typeof x === 'object' || typeof x === 'function'; + } + function assertDictionary(obj, context) { + if (obj !== undefined && !isDictionary(obj)) { + throw new TypeError(`${context} is not an object.`); + } + } + // https://heycam.github.io/webidl/#idl-callback-functions + function assertFunction(x, context) { + if (typeof x !== 'function') { + throw new TypeError(`${context} is not a function.`); + } + } + // https://heycam.github.io/webidl/#idl-object + function isObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; + } + function assertObject(x, context) { + if (!isObject(x)) { + throw new TypeError(`${context} is not an object.`); + } + } + function assertRequiredArgument(x, position, context) { + if (x === undefined) { + throw new TypeError(`Parameter ${position} is required in '${context}'.`); + } + } + function assertRequiredField(x, field, context) { + if (x === undefined) { + throw new TypeError(`${field} is required in '${context}'.`); + } + } + // https://heycam.github.io/webidl/#idl-unrestricted-double + function convertUnrestrictedDouble(value) { + return Number(value); + } + function censorNegativeZero(x) { + return x === 0 ? 0 : x; + } + function integerPart(x) { + return censorNegativeZero(MathTrunc(x)); + } + // https://heycam.github.io/webidl/#idl-unsigned-long-long + function convertUnsignedLongLongWithEnforceRange(value, context) { + const lowerBound = 0; + const upperBound = Number.MAX_SAFE_INTEGER; + let x = Number(value); + x = censorNegativeZero(x); + if (!NumberIsFinite(x)) { + throw new TypeError(`${context} is not a finite number`); + } + x = integerPart(x); + if (x < lowerBound || x > upperBound) { + throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`); + } + if (!NumberIsFinite(x) || x === 0) { + return 0; + } + // TODO Use BigInt if supported? + // let xBigInt = BigInt(integerPart(x)); + // xBigInt = BigInt.asUintN(64, xBigInt); + // return Number(xBigInt); + return x; + } + + function assertReadableStream(x, context) { + if (!IsReadableStream(x)) { + throw new TypeError(`${context} is not a ReadableStream.`); + } + } + + // Abstract operations for the ReadableStream. + function AcquireReadableStreamDefaultReader(stream) { + return new ReadableStreamDefaultReader(stream); + } + // ReadableStream API exposed for controllers. + function ReadableStreamAddReadRequest(stream, readRequest) { + stream._reader._readRequests.push(readRequest); + } + function ReadableStreamFulfillReadRequest(stream, chunk, done) { + const reader = stream._reader; + const readRequest = reader._readRequests.shift(); + if (done) { + readRequest._closeSteps(); + } + else { + readRequest._chunkSteps(chunk); + } + } + function ReadableStreamGetNumReadRequests(stream) { + return stream._reader._readRequests.length; + } + function ReadableStreamHasDefaultReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamDefaultReader(reader)) { + return false; + } + return true; + } + /** + * A default reader vended by a {@link ReadableStream}. + * + * @public + */ + class ReadableStreamDefaultReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, + * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + /** + * Returns a promise that allows access to the next chunk from the stream's internal queue, if available. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + read() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('read')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: () => resolvePromise({ value: undefined, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamDefaultReaderRead(this, readRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamDefaultReader(this)) { + throw defaultReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamDefaultReaderRelease(this); + } + } + Object.defineProperties(ReadableStreamDefaultReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } + }); + setFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel'); + setFunctionName(ReadableStreamDefaultReader.prototype.read, 'read'); + setFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultReader', + configurable: true + }); + } + // Abstract operations for the readers. + function IsReadableStreamDefaultReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) { + return false; + } + return x instanceof ReadableStreamDefaultReader; + } + function ReadableStreamDefaultReaderRead(reader, readRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'closed') { + readRequest._closeSteps(); + } + else if (stream._state === 'errored') { + readRequest._errorSteps(stream._storedError); + } + else { + stream._readableStreamController[PullSteps](readRequest); + } + } + function ReadableStreamDefaultReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + function ReadableStreamDefaultReaderErrorReadRequests(reader, e) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._errorSteps(e); + }); + } + // Helper functions for the ReadableStreamDefaultReader. + function defaultReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`); + } + + /// + /* eslint-disable @typescript-eslint/no-empty-function */ + const AsyncIteratorPrototype = Object.getPrototypeOf(Object.getPrototypeOf(async function* () { }).prototype); + + /// + class ReadableStreamAsyncIteratorImpl { + constructor(reader, preventCancel) { + this._ongoingPromise = undefined; + this._isFinished = false; + this._reader = reader; + this._preventCancel = preventCancel; + } + next() { + const nextSteps = () => this._nextSteps(); + this._ongoingPromise = this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) : + nextSteps(); + return this._ongoingPromise; + } + return(value) { + const returnSteps = () => this._returnSteps(value); + return this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) : + returnSteps(); + } + _nextSteps() { + if (this._isFinished) { + return Promise.resolve({ value: undefined, done: true }); + } + const reader = this._reader; + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => { + this._ongoingPromise = undefined; + // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test. + // FIXME Is this a bug in the specification, or in the test? + _queueMicrotask(() => resolvePromise({ value: chunk, done: false })); + }, + _closeSteps: () => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + resolvePromise({ value: undefined, done: true }); + }, + _errorSteps: reason => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + rejectPromise(reason); + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promise; + } + _returnSteps(value) { + if (this._isFinished) { + return Promise.resolve({ value, done: true }); + } + this._isFinished = true; + const reader = this._reader; + if (!this._preventCancel) { + const result = ReadableStreamReaderGenericCancel(reader, value); + ReadableStreamReaderGenericRelease(reader); + return transformPromiseWith(result, () => ({ value, done: true })); + } + ReadableStreamReaderGenericRelease(reader); + return promiseResolvedWith({ value, done: true }); + } + } + const ReadableStreamAsyncIteratorPrototype = { + next() { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next')); + } + return this._asyncIteratorImpl.next(); + }, + return(value) { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return')); + } + return this._asyncIteratorImpl.return(value); + } + }; + Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype); + // Abstract operations for the ReadableStream. + function AcquireReadableStreamAsyncIterator(stream, preventCancel) { + const reader = AcquireReadableStreamDefaultReader(stream); + const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel); + const iterator = Object.create(ReadableStreamAsyncIteratorPrototype); + iterator._asyncIteratorImpl = impl; + return iterator; + } + function IsReadableStreamAsyncIterator(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) { + return false; + } + try { + // noinspection SuspiciousTypeOfGuard + return x._asyncIteratorImpl instanceof + ReadableStreamAsyncIteratorImpl; + } + catch (_a) { + return false; + } + } + // Helper functions for the ReadableStream. + function streamAsyncIteratorBrandCheckException(name) { + return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`); + } + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill + const NumberIsNaN = Number.isNaN || function (x) { + // eslint-disable-next-line no-self-compare + return x !== x; + }; + + var _a, _b, _c; + function CreateArrayFromList(elements) { + // We use arrays to represent lists, so this is basically a no-op. + // Do a slice though just in case we happen to depend on the unique-ness. + return elements.slice(); + } + function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) { + new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset); + } + let TransferArrayBuffer = (O) => { + if (typeof O.transfer === 'function') { + TransferArrayBuffer = buffer => buffer.transfer(); + } + else if (typeof structuredClone === 'function') { + TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] }); + } + else { + // Not implemented correctly + TransferArrayBuffer = buffer => buffer; + } + return TransferArrayBuffer(O); + }; + let IsDetachedBuffer = (O) => { + if (typeof O.detached === 'boolean') { + IsDetachedBuffer = buffer => buffer.detached; + } + else { + // Not implemented correctly + IsDetachedBuffer = buffer => buffer.byteLength === 0; + } + return IsDetachedBuffer(O); + }; + function ArrayBufferSlice(buffer, begin, end) { + // ArrayBuffer.prototype.slice is not available on IE10 + // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice + if (buffer.slice) { + return buffer.slice(begin, end); + } + const length = end - begin; + const slice = new ArrayBuffer(length); + CopyDataBlockBytes(slice, 0, buffer, begin, length); + return slice; + } + function GetMethod(receiver, prop) { + const func = receiver[prop]; + if (func === undefined || func === null) { + return undefined; + } + if (typeof func !== 'function') { + throw new TypeError(`${String(prop)} is not a function`); + } + return func; + } + function CreateAsyncFromSyncIterator(syncIteratorRecord) { + // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%, + // we use yield* inside an async generator function to achieve the same result. + // Wrap the sync iterator inside a sync iterable, so we can use it with yield*. + const syncIterable = { + [Symbol.iterator]: () => syncIteratorRecord.iterator + }; + // Create an async generator function and immediately invoke it. + const asyncIterator = (async function* () { + return yield* syncIterable; + }()); + // Return as an async iterator record. + const nextMethod = asyncIterator.next; + return { iterator: asyncIterator, nextMethod, done: false }; + } + // Aligns with core-js/modules/es.symbol.async-iterator.js + const SymbolAsyncIterator = (_c = (_a = Symbol.asyncIterator) !== null && _a !== void 0 ? _a : (_b = Symbol.for) === null || _b === void 0 ? void 0 : _b.call(Symbol, 'Symbol.asyncIterator')) !== null && _c !== void 0 ? _c : '@@asyncIterator'; + function GetIterator(obj, hint = 'sync', method) { + if (method === undefined) { + if (hint === 'async') { + method = GetMethod(obj, SymbolAsyncIterator); + if (method === undefined) { + const syncMethod = GetMethod(obj, Symbol.iterator); + const syncIteratorRecord = GetIterator(obj, 'sync', syncMethod); + return CreateAsyncFromSyncIterator(syncIteratorRecord); + } + } + else { + method = GetMethod(obj, Symbol.iterator); + } + } + if (method === undefined) { + throw new TypeError('The object is not iterable'); + } + const iterator = reflectCall(method, obj, []); + if (!typeIsObject(iterator)) { + throw new TypeError('The iterator method must return an object'); + } + const nextMethod = iterator.next; + return { iterator, nextMethod, done: false }; + } + function IteratorNext(iteratorRecord) { + const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []); + if (!typeIsObject(result)) { + throw new TypeError('The iterator.next() method must return an object'); + } + return result; + } + function IteratorComplete(iterResult) { + return Boolean(iterResult.done); + } + function IteratorValue(iterResult) { + return iterResult.value; + } + + function IsNonNegativeNumber(v) { + if (typeof v !== 'number') { + return false; + } + if (NumberIsNaN(v)) { + return false; + } + if (v < 0) { + return false; + } + return true; + } + function CloneAsUint8Array(O) { + const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength); + return new Uint8Array(buffer); + } + + function DequeueValue(container) { + const pair = container._queue.shift(); + container._queueTotalSize -= pair.size; + if (container._queueTotalSize < 0) { + container._queueTotalSize = 0; + } + return pair.value; + } + function EnqueueValueWithSize(container, value, size) { + if (!IsNonNegativeNumber(size) || size === Infinity) { + throw new RangeError('Size must be a finite, non-NaN, non-negative number.'); + } + container._queue.push({ value, size }); + container._queueTotalSize += size; + } + function PeekQueueValue(container) { + const pair = container._queue.peek(); + return pair.value; + } + function ResetQueue(container) { + container._queue = new SimpleQueue(); + container._queueTotalSize = 0; + } + + function isDataViewConstructor(ctor) { + return ctor === DataView; + } + function isDataView(view) { + return isDataViewConstructor(view.constructor); + } + function arrayBufferViewElementSize(ctor) { + if (isDataViewConstructor(ctor)) { + return 1; + } + return ctor.BYTES_PER_ELEMENT; + } + + /** + * A pull-into request in a {@link ReadableByteStreamController}. + * + * @public + */ + class ReadableStreamBYOBRequest { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the view for writing in to, or `null` if the BYOB request has already been responded to. + */ + get view() { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('view'); + } + return this._view; + } + respond(bytesWritten) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respond'); + } + assertRequiredArgument(bytesWritten, 1, 'respond'); + bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter'); + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(this._view.buffer)) { + throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`); + } + ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten); + } + respondWithNewView(view) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respondWithNewView'); + } + assertRequiredArgument(view, 1, 'respondWithNewView'); + if (!ArrayBuffer.isView(view)) { + throw new TypeError('You can only respond with array buffer views'); + } + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(view.buffer)) { + throw new TypeError('The given view\'s buffer has been detached and so cannot be used as a response'); + } + ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view); + } + } + Object.defineProperties(ReadableStreamBYOBRequest.prototype, { + respond: { enumerable: true }, + respondWithNewView: { enumerable: true }, + view: { enumerable: true } + }); + setFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond'); + setFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBRequest', + configurable: true + }); + } + /** + * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue. + * + * @public + */ + class ReadableByteStreamController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the current BYOB pull request, or `null` if there isn't one. + */ + get byobRequest() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('byobRequest'); + } + return ReadableByteStreamControllerGetBYOBRequest(this); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('desiredSize'); + } + return ReadableByteStreamControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('close'); + } + if (this._closeRequested) { + throw new TypeError('The stream has already been closed; do not close it again!'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`); + } + ReadableByteStreamControllerClose(this); + } + enqueue(chunk) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('enqueue'); + } + assertRequiredArgument(chunk, 1, 'enqueue'); + if (!ArrayBuffer.isView(chunk)) { + throw new TypeError('chunk must be an array buffer view'); + } + if (chunk.byteLength === 0) { + throw new TypeError('chunk must have non-zero byteLength'); + } + if (chunk.buffer.byteLength === 0) { + throw new TypeError(`chunk's buffer must have non-zero byteLength`); + } + if (this._closeRequested) { + throw new TypeError('stream is closed or draining'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`); + } + ReadableByteStreamControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('error'); + } + ReadableByteStreamControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ReadableByteStreamControllerClearPendingPullIntos(this); + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableByteStreamControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableByteStream; + if (this._queueTotalSize > 0) { + ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest); + return; + } + const autoAllocateChunkSize = this._autoAllocateChunkSize; + if (autoAllocateChunkSize !== undefined) { + let buffer; + try { + buffer = new ArrayBuffer(autoAllocateChunkSize); + } + catch (bufferE) { + readRequest._errorSteps(bufferE); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: autoAllocateChunkSize, + byteOffset: 0, + byteLength: autoAllocateChunkSize, + bytesFilled: 0, + minimumFill: 1, + elementSize: 1, + viewConstructor: Uint8Array, + readerType: 'default' + }; + this._pendingPullIntos.push(pullIntoDescriptor); + } + ReadableStreamAddReadRequest(stream, readRequest); + ReadableByteStreamControllerCallPullIfNeeded(this); + } + /** @internal */ + [ReleaseSteps]() { + if (this._pendingPullIntos.length > 0) { + const firstPullInto = this._pendingPullIntos.peek(); + firstPullInto.readerType = 'none'; + this._pendingPullIntos = new SimpleQueue(); + this._pendingPullIntos.push(firstPullInto); + } + } + } + Object.defineProperties(ReadableByteStreamController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + byobRequest: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(ReadableByteStreamController.prototype.close, 'close'); + setFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue'); + setFunctionName(ReadableByteStreamController.prototype.error, 'error'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, { + value: 'ReadableByteStreamController', + configurable: true + }); + } + // Abstract operations for the ReadableByteStreamController. + function IsReadableByteStreamController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) { + return false; + } + return x instanceof ReadableByteStreamController; + } + function IsReadableStreamBYOBRequest(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) { + return false; + } + return x instanceof ReadableStreamBYOBRequest; + } + function ReadableByteStreamControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableByteStreamControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + // TODO: Test controller argument + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableByteStreamControllerError(controller, e); + return null; + }); + } + function ReadableByteStreamControllerClearPendingPullIntos(controller) { + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + controller._pendingPullIntos = new SimpleQueue(); + } + function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) { + let done = false; + if (stream._state === 'closed') { + done = true; + } + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'default') { + ReadableStreamFulfillReadRequest(stream, filledView, done); + } + else { + ReadableStreamFulfillReadIntoRequest(stream, filledView, done); + } + } + function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) { + const bytesFilled = pullIntoDescriptor.bytesFilled; + const elementSize = pullIntoDescriptor.elementSize; + return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize); + } + function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) { + controller._queue.push({ buffer, byteOffset, byteLength }); + controller._queueTotalSize += byteLength; + } + function ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, buffer, byteOffset, byteLength) { + let clonedChunk; + try { + clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength); + } + catch (cloneE) { + ReadableByteStreamControllerError(controller, cloneE); + throw cloneE; + } + ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength); + } + function ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstDescriptor) { + if (firstDescriptor.bytesFilled > 0) { + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, firstDescriptor.buffer, firstDescriptor.byteOffset, firstDescriptor.bytesFilled); + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) { + const maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled); + const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy; + let totalBytesToCopyRemaining = maxBytesToCopy; + let ready = false; + const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize; + const maxAlignedBytes = maxBytesFilled - remainderBytes; + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) { + totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled; + ready = true; + } + const queue = controller._queue; + while (totalBytesToCopyRemaining > 0) { + const headOfQueue = queue.peek(); + const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength); + const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy); + if (headOfQueue.byteLength === bytesToCopy) { + queue.shift(); + } + else { + headOfQueue.byteOffset += bytesToCopy; + headOfQueue.byteLength -= bytesToCopy; + } + controller._queueTotalSize -= bytesToCopy; + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor); + totalBytesToCopyRemaining -= bytesToCopy; + } + return ready; + } + function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) { + pullIntoDescriptor.bytesFilled += size; + } + function ReadableByteStreamControllerHandleQueueDrain(controller) { + if (controller._queueTotalSize === 0 && controller._closeRequested) { + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(controller._controlledReadableByteStream); + } + else { + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + } + function ReadableByteStreamControllerInvalidateBYOBRequest(controller) { + if (controller._byobRequest === null) { + return; + } + controller._byobRequest._associatedReadableByteStreamController = undefined; + controller._byobRequest._view = null; + controller._byobRequest = null; + } + function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) { + while (controller._pendingPullIntos.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const pullIntoDescriptor = controller._pendingPullIntos.peek(); + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + } + } + } + function ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller) { + const reader = controller._controlledReadableByteStream._reader; + while (reader._readRequests.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const readRequest = reader._readRequests.shift(); + ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest); + } + } + function ReadableByteStreamControllerPullInto(controller, view, min, readIntoRequest) { + const stream = controller._controlledReadableByteStream; + const ctor = view.constructor; + const elementSize = arrayBufferViewElementSize(ctor); + const { byteOffset, byteLength } = view; + const minimumFill = min * elementSize; + let buffer; + try { + buffer = TransferArrayBuffer(view.buffer); + } + catch (e) { + readIntoRequest._errorSteps(e); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: buffer.byteLength, + byteOffset, + byteLength, + bytesFilled: 0, + minimumFill, + elementSize, + viewConstructor: ctor, + readerType: 'byob' + }; + if (controller._pendingPullIntos.length > 0) { + controller._pendingPullIntos.push(pullIntoDescriptor); + // No ReadableByteStreamControllerCallPullIfNeeded() call since: + // - No change happens on desiredSize + // - The source has already been notified of that there's at least 1 pending read(view) + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + return; + } + if (stream._state === 'closed') { + const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0); + readIntoRequest._closeSteps(emptyView); + return; + } + if (controller._queueTotalSize > 0) { + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + ReadableByteStreamControllerHandleQueueDrain(controller); + readIntoRequest._chunkSteps(filledView); + return; + } + if (controller._closeRequested) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + readIntoRequest._errorSteps(e); + return; + } + } + controller._pendingPullIntos.push(pullIntoDescriptor); + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) { + if (firstDescriptor.readerType === 'none') { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const stream = controller._controlledReadableByteStream; + if (ReadableStreamHasBYOBReader(stream)) { + while (ReadableStreamGetNumReadIntoRequests(stream) > 0) { + const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor); + } + } + } + function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) { + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + return; + } + if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) { + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + return; + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize; + if (remainderSize > 0) { + const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, pullIntoDescriptor.buffer, end - remainderSize, remainderSize); + } + pullIntoDescriptor.bytesFilled -= remainderSize; + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor); + } + else { + ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerShiftPendingPullInto(controller) { + const descriptor = controller._pendingPullIntos.shift(); + return descriptor; + } + function ReadableByteStreamControllerShouldCallPull(controller) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return false; + } + if (controller._closeRequested) { + return false; + } + if (!controller._started) { + return false; + } + if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; + } + function ReadableByteStreamControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + } + // A client of ReadableByteStreamController may use these functions directly to bypass state check. + function ReadableByteStreamControllerClose(controller) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + if (controller._queueTotalSize > 0) { + controller._closeRequested = true; + return; + } + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + throw e; + } + } + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } + function ReadableByteStreamControllerEnqueue(controller, chunk) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + const { buffer, byteOffset, byteLength } = chunk; + if (IsDetachedBuffer(buffer)) { + throw new TypeError('chunk\'s buffer is detached and so cannot be enqueued'); + } + const transferredBuffer = TransferArrayBuffer(buffer); + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (IsDetachedBuffer(firstPendingPullInto.buffer)) { + throw new TypeError('The BYOB request\'s buffer has been detached and so cannot be filled with an enqueued chunk'); + } + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer); + if (firstPendingPullInto.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto); + } + } + if (ReadableStreamHasDefaultReader(stream)) { + ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller); + if (ReadableStreamGetNumReadRequests(stream) === 0) { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + else { + if (controller._pendingPullIntos.length > 0) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength); + ReadableStreamFulfillReadRequest(stream, transferredView, false); + } + } + else if (ReadableStreamHasBYOBReader(stream)) { + // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully. + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + else { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerError(controller, e) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return; + } + ReadableByteStreamControllerClearPendingPullIntos(controller); + ResetQueue(controller); + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); + } + function ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest) { + const entry = controller._queue.shift(); + controller._queueTotalSize -= entry.byteLength; + ReadableByteStreamControllerHandleQueueDrain(controller); + const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength); + readRequest._chunkSteps(view); + } + function ReadableByteStreamControllerGetBYOBRequest(controller) { + if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled); + const byobRequest = Object.create(ReadableStreamBYOBRequest.prototype); + SetUpReadableStreamBYOBRequest(byobRequest, controller, view); + controller._byobRequest = byobRequest; + } + return controller._byobRequest; + } + function ReadableByteStreamControllerGetDesiredSize(controller) { + const state = controller._controlledReadableByteStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; + } + function ReadableByteStreamControllerRespond(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (bytesWritten !== 0) { + throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream'); + } + } + else { + if (bytesWritten === 0) { + throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream'); + } + if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) { + throw new RangeError('bytesWritten out of range'); + } + } + firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer); + ReadableByteStreamControllerRespondInternal(controller, bytesWritten); + } + function ReadableByteStreamControllerRespondWithNewView(controller, view) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (view.byteLength !== 0) { + throw new TypeError('The view\'s length must be 0 when calling respondWithNewView() on a closed stream'); + } + } + else { + if (view.byteLength === 0) { + throw new TypeError('The view\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'); + } + } + if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) { + throw new RangeError('The region specified by view does not match byobRequest'); + } + if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) { + throw new RangeError('The buffer of view has different capacity than byobRequest'); + } + if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) { + throw new RangeError('The region specified by view is larger than byobRequest'); + } + const viewByteLength = view.byteLength; + firstDescriptor.buffer = TransferArrayBuffer(view.buffer); + ReadableByteStreamControllerRespondInternal(controller, viewByteLength); + } + function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) { + controller._controlledReadableByteStream = stream; + controller._pullAgain = false; + controller._pulling = false; + controller._byobRequest = null; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._closeRequested = false; + controller._started = false; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._autoAllocateChunkSize = autoAllocateChunkSize; + controller._pendingPullIntos = new SimpleQueue(); + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableByteStreamControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableByteStreamControllerError(controller, r); + return null; + }); + } + function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) { + const controller = Object.create(ReadableByteStreamController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingByteSource.start !== undefined) { + startAlgorithm = () => underlyingByteSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingByteSource.pull !== undefined) { + pullAlgorithm = () => underlyingByteSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingByteSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingByteSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize; + if (autoAllocateChunkSize === 0) { + throw new TypeError('autoAllocateChunkSize must be greater than 0'); + } + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize); + } + function SetUpReadableStreamBYOBRequest(request, controller, view) { + request._associatedReadableByteStreamController = controller; + request._view = view; + } + // Helper functions for the ReadableStreamBYOBRequest. + function byobRequestBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`); + } + // Helper functions for the ReadableByteStreamController. + function byteStreamControllerBrandCheckException(name) { + return new TypeError(`ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`); + } + + function convertReaderOptions(options, context) { + assertDictionary(options, context); + const mode = options === null || options === void 0 ? void 0 : options.mode; + return { + mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`) + }; + } + function convertReadableStreamReaderMode(mode, context) { + mode = `${mode}`; + if (mode !== 'byob') { + throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`); + } + return mode; + } + function convertByobReadOptions(options, context) { + var _a; + assertDictionary(options, context); + const min = (_a = options === null || options === void 0 ? void 0 : options.min) !== null && _a !== void 0 ? _a : 1; + return { + min: convertUnsignedLongLongWithEnforceRange(min, `${context} has member 'min' that`) + }; + } + + // Abstract operations for the ReadableStream. + function AcquireReadableStreamBYOBReader(stream) { + return new ReadableStreamBYOBReader(stream); + } + // ReadableStream API exposed for controllers. + function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) { + stream._reader._readIntoRequests.push(readIntoRequest); + } + function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) { + const reader = stream._reader; + const readIntoRequest = reader._readIntoRequests.shift(); + if (done) { + readIntoRequest._closeSteps(chunk); + } + else { + readIntoRequest._chunkSteps(chunk); + } + } + function ReadableStreamGetNumReadIntoRequests(stream) { + return stream._reader._readIntoRequests.length; + } + function ReadableStreamHasBYOBReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamBYOBReader(reader)) { + return false; + } + return true; + } + /** + * A BYOB reader vended by a {@link ReadableStream}. + * + * @public + */ + class ReadableStreamBYOBReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + if (!IsReadableByteStreamController(stream._readableStreamController)) { + throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' + + 'source'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readIntoRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + read(view, rawOptions = {}) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('read')); + } + if (!ArrayBuffer.isView(view)) { + return promiseRejectedWith(new TypeError('view must be an array buffer view')); + } + if (view.byteLength === 0) { + return promiseRejectedWith(new TypeError('view must have non-zero byteLength')); + } + if (view.buffer.byteLength === 0) { + return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`)); + } + if (IsDetachedBuffer(view.buffer)) { + return promiseRejectedWith(new TypeError('view\'s buffer has been detached')); + } + let options; + try { + options = convertByobReadOptions(rawOptions, 'options'); + } + catch (e) { + return promiseRejectedWith(e); + } + const min = options.min; + if (min === 0) { + return promiseRejectedWith(new TypeError('options.min must be greater than 0')); + } + if (!isDataView(view)) { + if (min > view.length) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s length')); + } + } + else if (min > view.byteLength) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s byteLength')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readIntoRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: chunk => resolvePromise({ value: chunk, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamBYOBReader(this)) { + throw byobReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamBYOBReaderRelease(this); + } + } + Object.defineProperties(ReadableStreamBYOBReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } + }); + setFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel'); + setFunctionName(ReadableStreamBYOBReader.prototype.read, 'read'); + setFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBReader', + configurable: true + }); + } + // Abstract operations for the readers. + function IsReadableStreamBYOBReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) { + return false; + } + return x instanceof ReadableStreamBYOBReader; + } + function ReadableStreamBYOBReaderRead(reader, view, min, readIntoRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'errored') { + readIntoRequest._errorSteps(stream._storedError); + } + else { + ReadableByteStreamControllerPullInto(stream._readableStreamController, view, min, readIntoRequest); + } + } + function ReadableStreamBYOBReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } + function ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._errorSteps(e); + }); + } + // Helper functions for the ReadableStreamBYOBReader. + function byobReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`); + } + + function ExtractHighWaterMark(strategy, defaultHWM) { + const { highWaterMark } = strategy; + if (highWaterMark === undefined) { + return defaultHWM; + } + if (NumberIsNaN(highWaterMark) || highWaterMark < 0) { + throw new RangeError('Invalid highWaterMark'); + } + return highWaterMark; + } + function ExtractSizeAlgorithm(strategy) { + const { size } = strategy; + if (!size) { + return () => 1; + } + return size; + } + + function convertQueuingStrategy(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + const size = init === null || init === void 0 ? void 0 : init.size; + return { + highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark), + size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`) + }; + } + function convertQueuingStrategySize(fn, context) { + assertFunction(fn, context); + return chunk => convertUnrestrictedDouble(fn(chunk)); + } + + function convertUnderlyingSink(original, context) { + assertDictionary(original, context); + const abort = original === null || original === void 0 ? void 0 : original.abort; + const close = original === null || original === void 0 ? void 0 : original.close; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + const write = original === null || original === void 0 ? void 0 : original.write; + return { + abort: abort === undefined ? + undefined : + convertUnderlyingSinkAbortCallback(abort, original, `${context} has member 'abort' that`), + close: close === undefined ? + undefined : + convertUnderlyingSinkCloseCallback(close, original, `${context} has member 'close' that`), + start: start === undefined ? + undefined : + convertUnderlyingSinkStartCallback(start, original, `${context} has member 'start' that`), + write: write === undefined ? + undefined : + convertUnderlyingSinkWriteCallback(write, original, `${context} has member 'write' that`), + type + }; + } + function convertUnderlyingSinkAbortCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); + } + function convertUnderlyingSinkCloseCallback(fn, original, context) { + assertFunction(fn, context); + return () => promiseCall(fn, original, []); + } + function convertUnderlyingSinkStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); + } + function convertUnderlyingSinkWriteCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); + } + + function assertWritableStream(x, context) { + if (!IsWritableStream(x)) { + throw new TypeError(`${context} is not a WritableStream.`); + } + } + + function isAbortSignal(value) { + if (typeof value !== 'object' || value === null) { + return false; + } + try { + return typeof value.aborted === 'boolean'; + } + catch (_a) { + // AbortSignal.prototype.aborted throws if its brand check fails + return false; + } + } + const supportsAbortController = typeof AbortController === 'function'; + /** + * Construct a new AbortController, if supported by the platform. + * + * @internal + */ + function createAbortController() { + if (supportsAbortController) { + return new AbortController(); + } + return undefined; + } + + /** + * A writable stream represents a destination for data, into which you can write. + * + * @public + */ + class WritableStream { + constructor(rawUnderlyingSink = {}, rawStrategy = {}) { + if (rawUnderlyingSink === undefined) { + rawUnderlyingSink = null; + } + else { + assertObject(rawUnderlyingSink, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter'); + InitializeWritableStream(this); + const type = underlyingSink.type; + if (type !== undefined) { + throw new RangeError('Invalid type is specified'); + } + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm); + } + /** + * Returns whether or not the writable stream is locked to a writer. + */ + get locked() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('locked'); + } + return IsWritableStreamLocked(this); + } + /** + * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be + * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort + * mechanism of the underlying sink. + * + * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled + * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel + * the stream) if the stream is currently locked. + */ + abort(reason = undefined) { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('abort')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer')); + } + return WritableStreamAbort(this, reason); + } + /** + * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its + * close behavior. During this time any further attempts to write will fail (without erroring the stream). + * + * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream + * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with + * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked. + */ + close() { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('close')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer')); + } + if (WritableStreamCloseQueuedOrInFlight(this)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamClose(this); + } + /** + * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream + * is locked, no other writer can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to write to a stream + * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at + * the same time, which would cause the resulting written data to be unpredictable and probably useless. + */ + getWriter() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('getWriter'); + } + return AcquireWritableStreamDefaultWriter(this); + } + } + Object.defineProperties(WritableStream.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + getWriter: { enumerable: true }, + locked: { enumerable: true } + }); + setFunctionName(WritableStream.prototype.abort, 'abort'); + setFunctionName(WritableStream.prototype.close, 'close'); + setFunctionName(WritableStream.prototype.getWriter, 'getWriter'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, { + value: 'WritableStream', + configurable: true + }); + } + // Abstract operations for the WritableStream. + function AcquireWritableStreamDefaultWriter(stream) { + return new WritableStreamDefaultWriter(stream); + } + // Throws if and only if startAlgorithm throws. + function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(WritableStream.prototype); + InitializeWritableStream(stream); + const controller = Object.create(WritableStreamDefaultController.prototype); + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + return stream; + } + function InitializeWritableStream(stream) { + stream._state = 'writable'; + // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is + // 'erroring' or 'errored'. May be set to an undefined value. + stream._storedError = undefined; + stream._writer = undefined; + // Initialize to undefined first because the constructor of the controller checks this + // variable to validate the caller. + stream._writableStreamController = undefined; + // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data + // producer without waiting for the queued writes to finish. + stream._writeRequests = new SimpleQueue(); + // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents + // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here. + stream._inFlightWriteRequest = undefined; + // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer + // has been detached. + stream._closeRequest = undefined; + // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it + // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here. + stream._inFlightCloseRequest = undefined; + // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached. + stream._pendingAbortRequest = undefined; + // The backpressure signal set by the controller. + stream._backpressure = false; + } + function IsWritableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) { + return false; + } + return x instanceof WritableStream; + } + function IsWritableStreamLocked(stream) { + if (stream._writer === undefined) { + return false; + } + return true; + } + function WritableStreamAbort(stream, reason) { + var _a; + if (stream._state === 'closed' || stream._state === 'errored') { + return promiseResolvedWith(undefined); + } + stream._writableStreamController._abortReason = reason; + (_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort(reason); + // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring', + // but it doesn't know that signaling abort runs author code that might have changed the state. + // Widen the type again by casting to WritableStreamState. + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseResolvedWith(undefined); + } + if (stream._pendingAbortRequest !== undefined) { + return stream._pendingAbortRequest._promise; + } + let wasAlreadyErroring = false; + if (state === 'erroring') { + wasAlreadyErroring = true; + // reason will not be used, so don't keep a reference to it. + reason = undefined; + } + const promise = newPromise((resolve, reject) => { + stream._pendingAbortRequest = { + _promise: undefined, + _resolve: resolve, + _reject: reject, + _reason: reason, + _wasAlreadyErroring: wasAlreadyErroring + }; + }); + stream._pendingAbortRequest._promise = promise; + if (!wasAlreadyErroring) { + WritableStreamStartErroring(stream, reason); + } + return promise; + } + function WritableStreamClose(stream) { + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseRejectedWith(new TypeError(`The stream (in ${state} state) is not in the writable state and cannot be closed`)); + } + const promise = newPromise((resolve, reject) => { + const closeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._closeRequest = closeRequest; + }); + const writer = stream._writer; + if (writer !== undefined && stream._backpressure && state === 'writable') { + defaultWriterReadyPromiseResolve(writer); + } + WritableStreamDefaultControllerClose(stream._writableStreamController); + return promise; + } + // WritableStream API exposed for controllers. + function WritableStreamAddWriteRequest(stream) { + const promise = newPromise((resolve, reject) => { + const writeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._writeRequests.push(writeRequest); + }); + return promise; + } + function WritableStreamDealWithRejection(stream, error) { + const state = stream._state; + if (state === 'writable') { + WritableStreamStartErroring(stream, error); + return; + } + WritableStreamFinishErroring(stream); + } + function WritableStreamStartErroring(stream, reason) { + const controller = stream._writableStreamController; + stream._state = 'erroring'; + stream._storedError = reason; + const writer = stream._writer; + if (writer !== undefined) { + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason); + } + if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) { + WritableStreamFinishErroring(stream); + } + } + function WritableStreamFinishErroring(stream) { + stream._state = 'errored'; + stream._writableStreamController[ErrorSteps](); + const storedError = stream._storedError; + stream._writeRequests.forEach(writeRequest => { + writeRequest._reject(storedError); + }); + stream._writeRequests = new SimpleQueue(); + if (stream._pendingAbortRequest === undefined) { + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const abortRequest = stream._pendingAbortRequest; + stream._pendingAbortRequest = undefined; + if (abortRequest._wasAlreadyErroring) { + abortRequest._reject(storedError); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const promise = stream._writableStreamController[AbortSteps](abortRequest._reason); + uponPromise(promise, () => { + abortRequest._resolve(); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }, (reason) => { + abortRequest._reject(reason); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }); + } + function WritableStreamFinishInFlightWrite(stream) { + stream._inFlightWriteRequest._resolve(undefined); + stream._inFlightWriteRequest = undefined; + } + function WritableStreamFinishInFlightWriteWithError(stream, error) { + stream._inFlightWriteRequest._reject(error); + stream._inFlightWriteRequest = undefined; + WritableStreamDealWithRejection(stream, error); + } + function WritableStreamFinishInFlightClose(stream) { + stream._inFlightCloseRequest._resolve(undefined); + stream._inFlightCloseRequest = undefined; + const state = stream._state; + if (state === 'erroring') { + // The error was too late to do anything, so it is ignored. + stream._storedError = undefined; + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._resolve(); + stream._pendingAbortRequest = undefined; + } + } + stream._state = 'closed'; + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseResolve(writer); + } + } + function WritableStreamFinishInFlightCloseWithError(stream, error) { + stream._inFlightCloseRequest._reject(error); + stream._inFlightCloseRequest = undefined; + // Never execute sink abort() after sink close(). + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._reject(error); + stream._pendingAbortRequest = undefined; + } + WritableStreamDealWithRejection(stream, error); + } + // TODO(ricea): Fix alphabetical order. + function WritableStreamCloseQueuedOrInFlight(stream) { + if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; + } + function WritableStreamHasOperationMarkedInFlight(stream) { + if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; + } + function WritableStreamMarkCloseRequestInFlight(stream) { + stream._inFlightCloseRequest = stream._closeRequest; + stream._closeRequest = undefined; + } + function WritableStreamMarkFirstWriteRequestInFlight(stream) { + stream._inFlightWriteRequest = stream._writeRequests.shift(); + } + function WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) { + if (stream._closeRequest !== undefined) { + stream._closeRequest._reject(stream._storedError); + stream._closeRequest = undefined; + } + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseReject(writer, stream._storedError); + } + } + function WritableStreamUpdateBackpressure(stream, backpressure) { + const writer = stream._writer; + if (writer !== undefined && backpressure !== stream._backpressure) { + if (backpressure) { + defaultWriterReadyPromiseReset(writer); + } + else { + defaultWriterReadyPromiseResolve(writer); + } + } + stream._backpressure = backpressure; + } + /** + * A default writer vended by a {@link WritableStream}. + * + * @public + */ + class WritableStreamDefaultWriter { + constructor(stream) { + assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter'); + assertWritableStream(stream, 'First parameter'); + if (IsWritableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive writing by another writer'); + } + this._ownerWritableStream = stream; + stream._writer = this; + const state = stream._state; + if (state === 'writable') { + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) { + defaultWriterReadyPromiseInitialize(this); + } + else { + defaultWriterReadyPromiseInitializeAsResolved(this); + } + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'erroring') { + defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError); + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'closed') { + defaultWriterReadyPromiseInitializeAsResolved(this); + defaultWriterClosedPromiseInitializeAsResolved(this); + } + else { + const storedError = stream._storedError; + defaultWriterReadyPromiseInitializeAsRejected(this, storedError); + defaultWriterClosedPromiseInitializeAsRejected(this, storedError); + } + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the writer’s lock is released before the stream finishes closing. + */ + get closed() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full. + * A producer can use this information to determine the right amount of data to write. + * + * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort + * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when + * the writer’s lock is released. + */ + get desiredSize() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('desiredSize'); + } + if (this._ownerWritableStream === undefined) { + throw defaultWriterLockException('desiredSize'); + } + return WritableStreamDefaultWriterGetDesiredSize(this); + } + /** + * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions + * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips + * back to zero or below, the getter will return a new promise that stays pending until the next transition. + * + * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become + * rejected. + */ + get ready() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('ready')); + } + return this._readyPromise; + } + /** + * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}. + */ + abort(reason = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('abort')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('abort')); + } + return WritableStreamDefaultWriterAbort(this, reason); + } + /** + * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}. + */ + close() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('close')); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return promiseRejectedWith(defaultWriterLockException('close')); + } + if (WritableStreamCloseQueuedOrInFlight(stream)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamDefaultWriterClose(this); + } + /** + * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active. + * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from + * now on; otherwise, the writer will appear closed. + * + * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the + * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled). + * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents + * other producers from writing in an interleaved manner. + */ + releaseLock() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('releaseLock'); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return; + } + WritableStreamDefaultWriterRelease(this); + } + write(chunk = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('write')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + return WritableStreamDefaultWriterWrite(this, chunk); + } + } + Object.defineProperties(WritableStreamDefaultWriter.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + releaseLock: { enumerable: true }, + write: { enumerable: true }, + closed: { enumerable: true }, + desiredSize: { enumerable: true }, + ready: { enumerable: true } + }); + setFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort'); + setFunctionName(WritableStreamDefaultWriter.prototype.close, 'close'); + setFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock'); + setFunctionName(WritableStreamDefaultWriter.prototype.write, 'write'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultWriter', + configurable: true + }); + } + // Abstract operations for the WritableStreamDefaultWriter. + function IsWritableStreamDefaultWriter(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultWriter; + } + // A client of WritableStreamDefaultWriter may use these functions directly to bypass state check. + function WritableStreamDefaultWriterAbort(writer, reason) { + const stream = writer._ownerWritableStream; + return WritableStreamAbort(stream, reason); + } + function WritableStreamDefaultWriterClose(writer) { + const stream = writer._ownerWritableStream; + return WritableStreamClose(stream); + } + function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseResolvedWith(undefined); + } + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + return WritableStreamDefaultWriterClose(writer); + } + function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) { + if (writer._closedPromiseState === 'pending') { + defaultWriterClosedPromiseReject(writer, error); + } + else { + defaultWriterClosedPromiseResetToRejected(writer, error); + } + } + function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) { + if (writer._readyPromiseState === 'pending') { + defaultWriterReadyPromiseReject(writer, error); + } + else { + defaultWriterReadyPromiseResetToRejected(writer, error); + } + } + function WritableStreamDefaultWriterGetDesiredSize(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (state === 'errored' || state === 'erroring') { + return null; + } + if (state === 'closed') { + return 0; + } + return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController); + } + function WritableStreamDefaultWriterRelease(writer) { + const stream = writer._ownerWritableStream; + const releasedError = new TypeError(`Writer was released and can no longer be used to monitor the stream's closedness`); + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError); + // The state transitions to "errored" before the sink abort() method runs, but the writer.closed promise is not + // rejected until afterwards. This means that simply testing state will not work. + WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError); + stream._writer = undefined; + writer._ownerWritableStream = undefined; + } + function WritableStreamDefaultWriterWrite(writer, chunk) { + const stream = writer._ownerWritableStream; + const controller = stream._writableStreamController; + const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk); + if (stream !== writer._ownerWritableStream) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + const state = stream._state; + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to')); + } + if (state === 'erroring') { + return promiseRejectedWith(stream._storedError); + } + const promise = WritableStreamAddWriteRequest(stream); + WritableStreamDefaultControllerWrite(controller, chunk, chunkSize); + return promise; + } + const closeSentinel = {}; + /** + * Allows control of a {@link WritableStream | writable stream}'s state and internal queue. + * + * @public + */ + class WritableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted. + * + * @deprecated + * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177. + * Use {@link WritableStreamDefaultController.signal}'s `reason` instead. + */ + get abortReason() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('abortReason'); + } + return this._abortReason; + } + /** + * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted. + */ + get signal() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('signal'); + } + if (this._abortController === undefined) { + // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`. + // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill, + // so instead we only implement support for `signal` if we find a global `AbortController` constructor. + throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported'); + } + return this._abortController.signal; + } + /** + * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`. + * + * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying + * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the + * normal lifecycle of interactions with the underlying sink. + */ + error(e = undefined) { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('error'); + } + const state = this._controlledWritableStream._state; + if (state !== 'writable') { + // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so + // just treat it as a no-op. + return; + } + WritableStreamDefaultControllerError(this, e); + } + /** @internal */ + [AbortSteps](reason) { + const result = this._abortAlgorithm(reason); + WritableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [ErrorSteps]() { + ResetQueue(this); + } + } + Object.defineProperties(WritableStreamDefaultController.prototype, { + abortReason: { enumerable: true }, + signal: { enumerable: true }, + error: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultController', + configurable: true + }); + } + // Abstract operations implementing interface required by the WritableStream. + function IsWritableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultController; + } + function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledWritableStream = stream; + stream._writableStreamController = controller; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._abortReason = undefined; + controller._abortController = createAbortController(); + controller._started = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._writeAlgorithm = writeAlgorithm; + controller._closeAlgorithm = closeAlgorithm; + controller._abortAlgorithm = abortAlgorithm; + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + const startResult = startAlgorithm(); + const startPromise = promiseResolvedWith(startResult); + uponPromise(startPromise, () => { + controller._started = true; + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, r => { + controller._started = true; + WritableStreamDealWithRejection(stream, r); + return null; + }); + } + function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) { + const controller = Object.create(WritableStreamDefaultController.prototype); + let startAlgorithm; + let writeAlgorithm; + let closeAlgorithm; + let abortAlgorithm; + if (underlyingSink.start !== undefined) { + startAlgorithm = () => underlyingSink.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSink.write !== undefined) { + writeAlgorithm = chunk => underlyingSink.write(chunk, controller); + } + else { + writeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.close !== undefined) { + closeAlgorithm = () => underlyingSink.close(); + } + else { + closeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.abort !== undefined) { + abortAlgorithm = reason => underlyingSink.abort(reason); + } + else { + abortAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + } + // ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls. + function WritableStreamDefaultControllerClearAlgorithms(controller) { + controller._writeAlgorithm = undefined; + controller._closeAlgorithm = undefined; + controller._abortAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; + } + function WritableStreamDefaultControllerClose(controller) { + EnqueueValueWithSize(controller, closeSentinel, 0); + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + } + function WritableStreamDefaultControllerGetChunkSize(controller, chunk) { + try { + return controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE); + return 1; + } + } + function WritableStreamDefaultControllerGetDesiredSize(controller) { + return controller._strategyHWM - controller._queueTotalSize; + } + function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) { + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE); + return; + } + const stream = controller._controlledWritableStream; + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + } + // Abstract operations for the WritableStreamDefaultController. + function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) { + const stream = controller._controlledWritableStream; + if (!controller._started) { + return; + } + if (stream._inFlightWriteRequest !== undefined) { + return; + } + const state = stream._state; + if (state === 'erroring') { + WritableStreamFinishErroring(stream); + return; + } + if (controller._queue.length === 0) { + return; + } + const value = PeekQueueValue(controller); + if (value === closeSentinel) { + WritableStreamDefaultControllerProcessClose(controller); + } + else { + WritableStreamDefaultControllerProcessWrite(controller, value); + } + } + function WritableStreamDefaultControllerErrorIfNeeded(controller, error) { + if (controller._controlledWritableStream._state === 'writable') { + WritableStreamDefaultControllerError(controller, error); + } + } + function WritableStreamDefaultControllerProcessClose(controller) { + const stream = controller._controlledWritableStream; + WritableStreamMarkCloseRequestInFlight(stream); + DequeueValue(controller); + const sinkClosePromise = controller._closeAlgorithm(); + WritableStreamDefaultControllerClearAlgorithms(controller); + uponPromise(sinkClosePromise, () => { + WritableStreamFinishInFlightClose(stream); + return null; + }, reason => { + WritableStreamFinishInFlightCloseWithError(stream, reason); + return null; + }); + } + function WritableStreamDefaultControllerProcessWrite(controller, chunk) { + const stream = controller._controlledWritableStream; + WritableStreamMarkFirstWriteRequestInFlight(stream); + const sinkWritePromise = controller._writeAlgorithm(chunk); + uponPromise(sinkWritePromise, () => { + WritableStreamFinishInFlightWrite(stream); + const state = stream._state; + DequeueValue(controller); + if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, reason => { + if (stream._state === 'writable') { + WritableStreamDefaultControllerClearAlgorithms(controller); + } + WritableStreamFinishInFlightWriteWithError(stream, reason); + return null; + }); + } + function WritableStreamDefaultControllerGetBackpressure(controller) { + const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller); + return desiredSize <= 0; + } + // A client of WritableStreamDefaultController may use these functions directly to bypass state check. + function WritableStreamDefaultControllerError(controller, error) { + const stream = controller._controlledWritableStream; + WritableStreamDefaultControllerClearAlgorithms(controller); + WritableStreamStartErroring(stream, error); + } + // Helper functions for the WritableStream. + function streamBrandCheckException$2(name) { + return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`); + } + // Helper functions for the WritableStreamDefaultController. + function defaultControllerBrandCheckException$2(name) { + return new TypeError(`WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`); + } + // Helper functions for the WritableStreamDefaultWriter. + function defaultWriterBrandCheckException(name) { + return new TypeError(`WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`); + } + function defaultWriterLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released writer'); + } + function defaultWriterClosedPromiseInitialize(writer) { + writer._closedPromise = newPromise((resolve, reject) => { + writer._closedPromise_resolve = resolve; + writer._closedPromise_reject = reject; + writer._closedPromiseState = 'pending'; + }); + } + function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseReject(writer, reason); + } + function defaultWriterClosedPromiseInitializeAsResolved(writer) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseResolve(writer); + } + function defaultWriterClosedPromiseReject(writer, reason) { + if (writer._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._closedPromise); + writer._closedPromise_reject(reason); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'rejected'; + } + function defaultWriterClosedPromiseResetToRejected(writer, reason) { + defaultWriterClosedPromiseInitializeAsRejected(writer, reason); + } + function defaultWriterClosedPromiseResolve(writer) { + if (writer._closedPromise_resolve === undefined) { + return; + } + writer._closedPromise_resolve(undefined); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'resolved'; + } + function defaultWriterReadyPromiseInitialize(writer) { + writer._readyPromise = newPromise((resolve, reject) => { + writer._readyPromise_resolve = resolve; + writer._readyPromise_reject = reject; + }); + writer._readyPromiseState = 'pending'; + } + function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseReject(writer, reason); + } + function defaultWriterReadyPromiseInitializeAsResolved(writer) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseResolve(writer); + } + function defaultWriterReadyPromiseReject(writer, reason) { + if (writer._readyPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._readyPromise); + writer._readyPromise_reject(reason); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'rejected'; + } + function defaultWriterReadyPromiseReset(writer) { + defaultWriterReadyPromiseInitialize(writer); + } + function defaultWriterReadyPromiseResetToRejected(writer, reason) { + defaultWriterReadyPromiseInitializeAsRejected(writer, reason); + } + function defaultWriterReadyPromiseResolve(writer) { + if (writer._readyPromise_resolve === undefined) { + return; + } + writer._readyPromise_resolve(undefined); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'fulfilled'; + } + + /// + function getGlobals() { + if (typeof globalThis !== 'undefined') { + return globalThis; + } + else if (typeof self !== 'undefined') { + return self; + } + else if (typeof global !== 'undefined') { + return global; + } + return undefined; + } + const globals = getGlobals(); + + /// + function isDOMExceptionConstructor(ctor) { + if (!(typeof ctor === 'function' || typeof ctor === 'object')) { + return false; + } + if (ctor.name !== 'DOMException') { + return false; + } + try { + new ctor(); + return true; + } + catch (_a) { + return false; + } + } + /** + * Support: + * - Web browsers + * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87) + */ + function getFromGlobal() { + const ctor = globals === null || globals === void 0 ? void 0 : globals.DOMException; + return isDOMExceptionConstructor(ctor) ? ctor : undefined; + } + /** + * Support: + * - All platforms + */ + function createPolyfill() { + // eslint-disable-next-line @typescript-eslint/no-shadow + const ctor = function DOMException(message, name) { + this.message = message || ''; + this.name = name || 'Error'; + if (Error.captureStackTrace) { + Error.captureStackTrace(this, this.constructor); + } + }; + setFunctionName(ctor, 'DOMException'); + ctor.prototype = Object.create(Error.prototype); + Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true }); + return ctor; + } + // eslint-disable-next-line @typescript-eslint/no-redeclare + const DOMException = getFromGlobal() || createPolyfill(); + + function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) { + const reader = AcquireReadableStreamDefaultReader(source); + const writer = AcquireWritableStreamDefaultWriter(dest); + source._disturbed = true; + let shuttingDown = false; + // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown. + let currentWrite = promiseResolvedWith(undefined); + return newPromise((resolve, reject) => { + let abortAlgorithm; + if (signal !== undefined) { + abortAlgorithm = () => { + const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError'); + const actions = []; + if (!preventAbort) { + actions.push(() => { + if (dest._state === 'writable') { + return WritableStreamAbort(dest, error); + } + return promiseResolvedWith(undefined); + }); + } + if (!preventCancel) { + actions.push(() => { + if (source._state === 'readable') { + return ReadableStreamCancel(source, error); + } + return promiseResolvedWith(undefined); + }); + } + shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error); + }; + if (signal.aborted) { + abortAlgorithm(); + return; + } + signal.addEventListener('abort', abortAlgorithm); + } + // Using reader and writer, read all chunks from this and write them to dest + // - Backpressure must be enforced + // - Shutdown must stop all activity + function pipeLoop() { + return newPromise((resolveLoop, rejectLoop) => { + function next(done) { + if (done) { + resolveLoop(); + } + else { + // Use `PerformPromiseThen` instead of `uponPromise` to avoid + // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers + PerformPromiseThen(pipeStep(), next, rejectLoop); + } + } + next(false); + }); + } + function pipeStep() { + if (shuttingDown) { + return promiseResolvedWith(true); + } + return PerformPromiseThen(writer._readyPromise, () => { + return newPromise((resolveRead, rejectRead) => { + ReadableStreamDefaultReaderRead(reader, { + _chunkSteps: chunk => { + currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop); + resolveRead(false); + }, + _closeSteps: () => resolveRead(true), + _errorSteps: rejectRead + }); + }); + }); + } + // Errors must be propagated forward + isOrBecomesErrored(source, reader._closedPromise, storedError => { + if (!preventAbort) { + shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Errors must be propagated backward + isOrBecomesErrored(dest, writer._closedPromise, storedError => { + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Closing must be propagated forward + isOrBecomesClosed(source, reader._closedPromise, () => { + if (!preventClose) { + shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer)); + } + else { + shutdown(); + } + return null; + }); + // Closing must be propagated backward + if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') { + const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it'); + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed); + } + else { + shutdown(true, destClosed); + } + } + setPromiseIsHandledToTrue(pipeLoop()); + function waitForWritesToFinish() { + // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait + // for that too. + const oldCurrentWrite = currentWrite; + return PerformPromiseThen(currentWrite, () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined); + } + function isOrBecomesErrored(stream, promise, action) { + if (stream._state === 'errored') { + action(stream._storedError); + } + else { + uponRejection(promise, action); + } + } + function isOrBecomesClosed(stream, promise, action) { + if (stream._state === 'closed') { + action(); + } + else { + uponFulfillment(promise, action); + } + } + function shutdownWithAction(action, originalIsError, originalError) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), doTheRest); + } + else { + doTheRest(); + } + function doTheRest() { + uponPromise(action(), () => finalize(originalIsError, originalError), newError => finalize(true, newError)); + return null; + } + } + function shutdown(isError, error) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error)); + } + else { + finalize(isError, error); + } + } + function finalize(isError, error) { + WritableStreamDefaultWriterRelease(writer); + ReadableStreamReaderGenericRelease(reader); + if (signal !== undefined) { + signal.removeEventListener('abort', abortAlgorithm); + } + if (isError) { + reject(error); + } + else { + resolve(undefined); + } + return null; + } + }); + } + + /** + * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue. + * + * @public + */ + class ReadableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('desiredSize'); + } + return ReadableStreamDefaultControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('close'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits close'); + } + ReadableStreamDefaultControllerClose(this); + } + enqueue(chunk = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('enqueue'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits enqueue'); + } + return ReadableStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('error'); + } + ReadableStreamDefaultControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableStream; + if (this._queue.length > 0) { + const chunk = DequeueValue(this); + if (this._closeRequested && this._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(this); + ReadableStreamClose(stream); + } + else { + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + readRequest._chunkSteps(chunk); + } + else { + ReadableStreamAddReadRequest(stream, readRequest); + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + } + /** @internal */ + [ReleaseSteps]() { + // Do nothing. + } + } + Object.defineProperties(ReadableStreamDefaultController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(ReadableStreamDefaultController.prototype.close, 'close'); + setFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue'); + setFunctionName(ReadableStreamDefaultController.prototype.error, 'error'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultController', + configurable: true + }); + } + // Abstract operations for the ReadableStreamDefaultController. + function IsReadableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) { + return false; + } + return x instanceof ReadableStreamDefaultController; + } + function ReadableStreamDefaultControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableStreamDefaultControllerError(controller, e); + return null; + }); + } + function ReadableStreamDefaultControllerShouldCallPull(controller) { + const stream = controller._controlledReadableStream; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return false; + } + if (!controller._started) { + return false; + } + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; + } + function ReadableStreamDefaultControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; + } + // A client of ReadableStreamDefaultController may use these functions directly to bypass state check. + function ReadableStreamDefaultControllerClose(controller) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + controller._closeRequested = true; + if (controller._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } + } + function ReadableStreamDefaultControllerEnqueue(controller, chunk) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + ReadableStreamFulfillReadRequest(stream, chunk, false); + } + else { + let chunkSize; + try { + chunkSize = controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + ReadableStreamDefaultControllerError(controller, chunkSizeE); + throw chunkSizeE; + } + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + ReadableStreamDefaultControllerError(controller, enqueueE); + throw enqueueE; + } + } + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + function ReadableStreamDefaultControllerError(controller, e) { + const stream = controller._controlledReadableStream; + if (stream._state !== 'readable') { + return; + } + ResetQueue(controller); + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); + } + function ReadableStreamDefaultControllerGetDesiredSize(controller) { + const state = controller._controlledReadableStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; + } + // This is used in the implementation of TransformStream. + function ReadableStreamDefaultControllerHasBackpressure(controller) { + if (ReadableStreamDefaultControllerShouldCallPull(controller)) { + return false; + } + return true; + } + function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) { + const state = controller._controlledReadableStream._state; + if (!controller._closeRequested && state === 'readable') { + return true; + } + return false; + } + function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledReadableStream = stream; + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._started = false; + controller._closeRequested = false; + controller._pullAgain = false; + controller._pulling = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableStreamDefaultControllerError(controller, r); + return null; + }); + } + function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) { + const controller = Object.create(ReadableStreamDefaultController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingSource.start !== undefined) { + startAlgorithm = () => underlyingSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSource.pull !== undefined) { + pullAlgorithm = () => underlyingSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + } + // Helper functions for the ReadableStreamDefaultController. + function defaultControllerBrandCheckException$1(name) { + return new TypeError(`ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`); + } + + function ReadableStreamTee(stream, cloneForBranch2) { + if (IsReadableByteStreamController(stream._readableStreamController)) { + return ReadableByteStreamTee(stream); + } + return ReadableStreamDefaultTee(stream); + } + function ReadableStreamDefaultTee(stream, cloneForBranch2) { + const reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgain = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function pullAlgorithm() { + if (reading) { + readAgain = true; + return promiseResolvedWith(undefined); + } + reading = true; + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgain = false; + const chunk1 = chunk; + const chunk2 = chunk; + // There is no way to access the cloning code right now in the reference implementation. + // If we add one then we'll need an implementation for serializable objects. + // if (!canceled2 && cloneForBranch2) { + // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2)); + // } + if (!canceled1) { + ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgain) { + pullAlgorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableStreamDefaultControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableStreamDefaultControllerClose(branch2._readableStreamController); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + // do nothing + } + branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm); + branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm); + uponRejection(reader._closedPromise, (r) => { + ReadableStreamDefaultControllerError(branch1._readableStreamController, r); + ReadableStreamDefaultControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + return [branch1, branch2]; + } + function ReadableByteStreamTee(stream) { + let reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgainForBranch1 = false; + let readAgainForBranch2 = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function forwardReaderError(thisReader) { + uponRejection(thisReader._closedPromise, r => { + if (thisReader !== reader) { + return null; + } + ReadableByteStreamControllerError(branch1._readableStreamController, r); + ReadableByteStreamControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + } + function pullWithDefaultReader() { + if (IsReadableStreamBYOBReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamDefaultReader(stream); + forwardReaderError(reader); + } + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const chunk1 = chunk; + let chunk2 = chunk; + if (!canceled1 && !canceled2) { + try { + chunk2 = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(branch1._readableStreamController, cloneE); + ReadableByteStreamControllerError(branch2._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + } + if (!canceled1) { + ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableByteStreamControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableByteStreamControllerClose(branch2._readableStreamController); + } + if (branch1._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch1._readableStreamController, 0); + } + if (branch2._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch2._readableStreamController, 0); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + } + function pullWithBYOBReader(view, forBranch2) { + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamBYOBReader(stream); + forwardReaderError(reader); + } + const byobBranch = forBranch2 ? branch2 : branch1; + const otherBranch = forBranch2 ? branch1 : branch2; + const readIntoRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!otherCanceled) { + let clonedChunk; + try { + clonedChunk = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE); + ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk); + } + else if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: chunk => { + reading = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!byobCanceled) { + ReadableByteStreamControllerClose(byobBranch._readableStreamController); + } + if (!otherCanceled) { + ReadableByteStreamControllerClose(otherBranch._readableStreamController); + } + if (chunk !== undefined) { + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0); + } + } + if (!byobCanceled || !otherCanceled) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest); + } + function pull1Algorithm() { + if (reading) { + readAgainForBranch1 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, false); + } + return promiseResolvedWith(undefined); + } + function pull2Algorithm() { + if (reading) { + readAgainForBranch2 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, true); + } + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + return; + } + branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm); + branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm); + forwardReaderError(reader); + return [branch1, branch2]; + } + + function isReadableStreamLike(stream) { + return typeIsObject(stream) && typeof stream.getReader !== 'undefined'; + } + + function ReadableStreamFrom(source) { + if (isReadableStreamLike(source)) { + return ReadableStreamFromDefaultReader(source.getReader()); + } + return ReadableStreamFromIterable(source); + } + function ReadableStreamFromIterable(asyncIterable) { + let stream; + const iteratorRecord = GetIterator(asyncIterable, 'async'); + const startAlgorithm = noop; + function pullAlgorithm() { + let nextResult; + try { + nextResult = IteratorNext(iteratorRecord); + } + catch (e) { + return promiseRejectedWith(e); + } + const nextPromise = promiseResolvedWith(nextResult); + return transformPromiseWith(nextPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object'); + } + const done = IteratorComplete(iterResult); + if (done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = IteratorValue(iterResult); + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + const iterator = iteratorRecord.iterator; + let returnMethod; + try { + returnMethod = GetMethod(iterator, 'return'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (returnMethod === undefined) { + return promiseResolvedWith(undefined); + } + let returnResult; + try { + returnResult = reflectCall(returnMethod, iterator, [reason]); + } + catch (e) { + return promiseRejectedWith(e); + } + const returnPromise = promiseResolvedWith(returnResult); + return transformPromiseWith(returnPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object'); + } + return undefined; + }); + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; + } + function ReadableStreamFromDefaultReader(reader) { + let stream; + const startAlgorithm = noop; + function pullAlgorithm() { + let readPromise; + try { + readPromise = reader.read(); + } + catch (e) { + return promiseRejectedWith(e); + } + return transformPromiseWith(readPromise, readResult => { + if (!typeIsObject(readResult)) { + throw new TypeError('The promise returned by the reader.read() method must fulfill with an object'); + } + if (readResult.done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = readResult.value; + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + try { + return promiseResolvedWith(reader.cancel(reason)); + } + catch (e) { + return promiseRejectedWith(e); + } + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; + } + + function convertUnderlyingDefaultOrByteSource(source, context) { + assertDictionary(source, context); + const original = source; + const autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize; + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const pull = original === null || original === void 0 ? void 0 : original.pull; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + return { + autoAllocateChunkSize: autoAllocateChunkSize === undefined ? + undefined : + convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, `${context} has member 'autoAllocateChunkSize' that`), + cancel: cancel === undefined ? + undefined : + convertUnderlyingSourceCancelCallback(cancel, original, `${context} has member 'cancel' that`), + pull: pull === undefined ? + undefined : + convertUnderlyingSourcePullCallback(pull, original, `${context} has member 'pull' that`), + start: start === undefined ? + undefined : + convertUnderlyingSourceStartCallback(start, original, `${context} has member 'start' that`), + type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`) + }; + } + function convertUnderlyingSourceCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); + } + function convertUnderlyingSourcePullCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); + } + function convertUnderlyingSourceStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); + } + function convertReadableStreamType(type, context) { + type = `${type}`; + if (type !== 'bytes') { + throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`); + } + return type; + } + + function convertIteratorOptions(options, context) { + assertDictionary(options, context); + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + return { preventCancel: Boolean(preventCancel) }; + } + + function convertPipeOptions(options, context) { + assertDictionary(options, context); + const preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort; + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + const preventClose = options === null || options === void 0 ? void 0 : options.preventClose; + const signal = options === null || options === void 0 ? void 0 : options.signal; + if (signal !== undefined) { + assertAbortSignal(signal, `${context} has member 'signal' that`); + } + return { + preventAbort: Boolean(preventAbort), + preventCancel: Boolean(preventCancel), + preventClose: Boolean(preventClose), + signal + }; + } + function assertAbortSignal(signal, context) { + if (!isAbortSignal(signal)) { + throw new TypeError(`${context} is not an AbortSignal.`); + } + } + + function convertReadableWritablePair(pair, context) { + assertDictionary(pair, context); + const readable = pair === null || pair === void 0 ? void 0 : pair.readable; + assertRequiredField(readable, 'readable', 'ReadableWritablePair'); + assertReadableStream(readable, `${context} has member 'readable' that`); + const writable = pair === null || pair === void 0 ? void 0 : pair.writable; + assertRequiredField(writable, 'writable', 'ReadableWritablePair'); + assertWritableStream(writable, `${context} has member 'writable' that`); + return { readable, writable }; + } + + /** + * A readable stream represents a source of data, from which you can read. + * + * @public + */ + class ReadableStream { + constructor(rawUnderlyingSource = {}, rawStrategy = {}) { + if (rawUnderlyingSource === undefined) { + rawUnderlyingSource = null; + } + else { + assertObject(rawUnderlyingSource, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter'); + InitializeReadableStream(this); + if (underlyingSource.type === 'bytes') { + if (strategy.size !== undefined) { + throw new RangeError('The strategy for a byte stream cannot have a size function'); + } + const highWaterMark = ExtractHighWaterMark(strategy, 0); + SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark); + } + else { + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm); + } + } + /** + * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}. + */ + get locked() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('locked'); + } + return IsReadableStreamLocked(this); + } + /** + * Cancels the stream, signaling a loss of interest in the stream by a consumer. + * + * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()} + * method, which might or might not use it. + */ + cancel(reason = undefined) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('cancel')); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader')); + } + return ReadableStreamCancel(this, reason); + } + getReader(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('getReader'); + } + const options = convertReaderOptions(rawOptions, 'First parameter'); + if (options.mode === undefined) { + return AcquireReadableStreamDefaultReader(this); + } + return AcquireReadableStreamBYOBReader(this); + } + pipeThrough(rawTransform, rawOptions = {}) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('pipeThrough'); + } + assertRequiredArgument(rawTransform, 1, 'pipeThrough'); + const transform = convertReadableWritablePair(rawTransform, 'First parameter'); + const options = convertPipeOptions(rawOptions, 'Second parameter'); + if (IsReadableStreamLocked(this)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream'); + } + if (IsWritableStreamLocked(transform.writable)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream'); + } + const promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + setPromiseIsHandledToTrue(promise); + return transform.readable; + } + pipeTo(destination, rawOptions = {}) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('pipeTo')); + } + if (destination === undefined) { + return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`); + } + if (!IsWritableStream(destination)) { + return promiseRejectedWith(new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)); + } + let options; + try { + options = convertPipeOptions(rawOptions, 'Second parameter'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')); + } + if (IsWritableStreamLocked(destination)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')); + } + return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + } + /** + * Tees this readable stream, returning a two-element array containing the two resulting branches as + * new {@link ReadableStream} instances. + * + * Teeing a stream will lock it, preventing any other consumer from acquiring a reader. + * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be + * propagated to the stream's underlying source. + * + * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable, + * this could allow interference between the two branches. + */ + tee() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('tee'); + } + const branches = ReadableStreamTee(this); + return CreateArrayFromList(branches); + } + values(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('values'); + } + const options = convertIteratorOptions(rawOptions, 'First parameter'); + return AcquireReadableStreamAsyncIterator(this, options.preventCancel); + } + [SymbolAsyncIterator](options) { + // Stub implementation, overridden below + return this.values(options); + } + /** + * Creates a new ReadableStream wrapping the provided iterable or async iterable. + * + * This can be used to adapt various kinds of objects into a readable stream, + * such as an array, an async generator, or a Node.js readable stream. + */ + static from(asyncIterable) { + return ReadableStreamFrom(asyncIterable); + } + } + Object.defineProperties(ReadableStream, { + from: { enumerable: true } + }); + Object.defineProperties(ReadableStream.prototype, { + cancel: { enumerable: true }, + getReader: { enumerable: true }, + pipeThrough: { enumerable: true }, + pipeTo: { enumerable: true }, + tee: { enumerable: true }, + values: { enumerable: true }, + locked: { enumerable: true } + }); + setFunctionName(ReadableStream.from, 'from'); + setFunctionName(ReadableStream.prototype.cancel, 'cancel'); + setFunctionName(ReadableStream.prototype.getReader, 'getReader'); + setFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough'); + setFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo'); + setFunctionName(ReadableStream.prototype.tee, 'tee'); + setFunctionName(ReadableStream.prototype.values, 'values'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, { + value: 'ReadableStream', + configurable: true + }); + } + Object.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, { + value: ReadableStream.prototype.values, + writable: true, + configurable: true + }); + // Abstract operations for the ReadableStream. + // Throws if and only if startAlgorithm throws. + function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableStreamDefaultController.prototype); + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + return stream; + } + // Throws if and only if startAlgorithm throws. + function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableByteStreamController.prototype); + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined); + return stream; + } + function InitializeReadableStream(stream) { + stream._state = 'readable'; + stream._reader = undefined; + stream._storedError = undefined; + stream._disturbed = false; + } + function IsReadableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) { + return false; + } + return x instanceof ReadableStream; + } + function IsReadableStreamLocked(stream) { + if (stream._reader === undefined) { + return false; + } + return true; + } + // ReadableStream API exposed for controllers. + function ReadableStreamCancel(stream, reason) { + stream._disturbed = true; + if (stream._state === 'closed') { + return promiseResolvedWith(undefined); + } + if (stream._state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + ReadableStreamClose(stream); + const reader = stream._reader; + if (reader !== undefined && IsReadableStreamBYOBReader(reader)) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._closeSteps(undefined); + }); + } + const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason); + return transformPromiseWith(sourceCancelPromise, noop); + } + function ReadableStreamClose(stream) { + stream._state = 'closed'; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseResolve(reader); + if (IsReadableStreamDefaultReader(reader)) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._closeSteps(); + }); + } + } + function ReadableStreamError(stream, e) { + stream._state = 'errored'; + stream._storedError = e; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseReject(reader, e); + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + else { + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } + } + // Helper functions for the ReadableStream. + function streamBrandCheckException$1(name) { + return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`); + } + + function convertQueuingStrategyInit(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit'); + return { + highWaterMark: convertUnrestrictedDouble(highWaterMark) + }; + } + + // The size function must not have a prototype property nor be a constructor + const byteLengthSizeFunction = (chunk) => { + return chunk.byteLength; + }; + setFunctionName(byteLengthSizeFunction, 'size'); + /** + * A queuing strategy that counts the number of bytes in each chunk. + * + * @public + */ + class ByteLengthQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('highWaterMark'); + } + return this._byteLengthQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by returning the value of its `byteLength` property. + */ + get size() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('size'); + } + return byteLengthSizeFunction; + } + } + Object.defineProperties(ByteLengthQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'ByteLengthQueuingStrategy', + configurable: true + }); + } + // Helper functions for the ByteLengthQueuingStrategy. + function byteLengthBrandCheckException(name) { + return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`); + } + function IsByteLengthQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof ByteLengthQueuingStrategy; + } + + // The size function must not have a prototype property nor be a constructor + const countSizeFunction = () => { + return 1; + }; + setFunctionName(countSizeFunction, 'size'); + /** + * A queuing strategy that counts the number of chunks. + * + * @public + */ + class CountQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'CountQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._countQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('highWaterMark'); + } + return this._countQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by always returning 1. + * This ensures that the total queue size is a count of the number of chunks in the queue. + */ + get size() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('size'); + } + return countSizeFunction; + } + } + Object.defineProperties(CountQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'CountQueuingStrategy', + configurable: true + }); + } + // Helper functions for the CountQueuingStrategy. + function countBrandCheckException(name) { + return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`); + } + function IsCountQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof CountQueuingStrategy; + } + + function convertTransformer(original, context) { + assertDictionary(original, context); + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const flush = original === null || original === void 0 ? void 0 : original.flush; + const readableType = original === null || original === void 0 ? void 0 : original.readableType; + const start = original === null || original === void 0 ? void 0 : original.start; + const transform = original === null || original === void 0 ? void 0 : original.transform; + const writableType = original === null || original === void 0 ? void 0 : original.writableType; + return { + cancel: cancel === undefined ? + undefined : + convertTransformerCancelCallback(cancel, original, `${context} has member 'cancel' that`), + flush: flush === undefined ? + undefined : + convertTransformerFlushCallback(flush, original, `${context} has member 'flush' that`), + readableType, + start: start === undefined ? + undefined : + convertTransformerStartCallback(start, original, `${context} has member 'start' that`), + transform: transform === undefined ? + undefined : + convertTransformerTransformCallback(transform, original, `${context} has member 'transform' that`), + writableType + }; + } + function convertTransformerFlushCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); + } + function convertTransformerStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); + } + function convertTransformerTransformCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); + } + function convertTransformerCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); + } + + // Class TransformStream + /** + * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream}, + * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side. + * In a manner specific to the transform stream in question, writes to the writable side result in new data being + * made available for reading from the readable side. + * + * @public + */ + class TransformStream { + constructor(rawTransformer = {}, rawWritableStrategy = {}, rawReadableStrategy = {}) { + if (rawTransformer === undefined) { + rawTransformer = null; + } + const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter'); + const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter'); + const transformer = convertTransformer(rawTransformer, 'First parameter'); + if (transformer.readableType !== undefined) { + throw new RangeError('Invalid readableType specified'); + } + if (transformer.writableType !== undefined) { + throw new RangeError('Invalid writableType specified'); + } + const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0); + const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy); + const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1); + const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy); + let startPromise_resolve; + const startPromise = newPromise(resolve => { + startPromise_resolve = resolve; + }); + InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + SetUpTransformStreamDefaultControllerFromTransformer(this, transformer); + if (transformer.start !== undefined) { + startPromise_resolve(transformer.start(this._transformStreamController)); + } + else { + startPromise_resolve(undefined); + } + } + /** + * The readable side of the transform stream. + */ + get readable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('readable'); + } + return this._readable; + } + /** + * The writable side of the transform stream. + */ + get writable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('writable'); + } + return this._writable; + } + } + Object.defineProperties(TransformStream.prototype, { + readable: { enumerable: true }, + writable: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, { + value: 'TransformStream', + configurable: true + }); + } + function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) { + function startAlgorithm() { + return startPromise; + } + function writeAlgorithm(chunk) { + return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk); + } + function abortAlgorithm(reason) { + return TransformStreamDefaultSinkAbortAlgorithm(stream, reason); + } + function closeAlgorithm() { + return TransformStreamDefaultSinkCloseAlgorithm(stream); + } + stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm); + function pullAlgorithm() { + return TransformStreamDefaultSourcePullAlgorithm(stream); + } + function cancelAlgorithm(reason) { + return TransformStreamDefaultSourceCancelAlgorithm(stream, reason); + } + stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure. + stream._backpressure = undefined; + stream._backpressureChangePromise = undefined; + stream._backpressureChangePromise_resolve = undefined; + TransformStreamSetBackpressure(stream, true); + stream._transformStreamController = undefined; + } + function IsTransformStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) { + return false; + } + return x instanceof TransformStream; + } + // This is a no-op if both sides are already errored. + function TransformStreamError(stream, e) { + ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e); + TransformStreamErrorWritableAndUnblockWrite(stream, e); + } + function TransformStreamErrorWritableAndUnblockWrite(stream, e) { + TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController); + WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e); + TransformStreamUnblockWrite(stream); + } + function TransformStreamUnblockWrite(stream) { + if (stream._backpressure) { + // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure() + // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time + // _backpressure is set. + TransformStreamSetBackpressure(stream, false); + } + } + function TransformStreamSetBackpressure(stream, backpressure) { + // Passes also when called during construction. + if (stream._backpressureChangePromise !== undefined) { + stream._backpressureChangePromise_resolve(); + } + stream._backpressureChangePromise = newPromise(resolve => { + stream._backpressureChangePromise_resolve = resolve; + }); + stream._backpressure = backpressure; + } + // Class TransformStreamDefaultController + /** + * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}. + * + * @public + */ + class TransformStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full. + */ + get desiredSize() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('desiredSize'); + } + const readableController = this._controlledTransformStream._readable._readableStreamController; + return ReadableStreamDefaultControllerGetDesiredSize(readableController); + } + enqueue(chunk = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('enqueue'); + } + TransformStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors both the readable side and the writable side of the controlled transform stream, making all future + * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded. + */ + error(reason = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('error'); + } + TransformStreamDefaultControllerError(this, reason); + } + /** + * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the + * transformer only needs to consume a portion of the chunks written to the writable side. + */ + terminate() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('terminate'); + } + TransformStreamDefaultControllerTerminate(this); + } + } + Object.defineProperties(TransformStreamDefaultController.prototype, { + enqueue: { enumerable: true }, + error: { enumerable: true }, + terminate: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue'); + setFunctionName(TransformStreamDefaultController.prototype.error, 'error'); + setFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'TransformStreamDefaultController', + configurable: true + }); + } + // Transform Stream Default Controller Abstract Operations + function IsTransformStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) { + return false; + } + return x instanceof TransformStreamDefaultController; + } + function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm) { + controller._controlledTransformStream = stream; + stream._transformStreamController = controller; + controller._transformAlgorithm = transformAlgorithm; + controller._flushAlgorithm = flushAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._finishPromise = undefined; + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) { + const controller = Object.create(TransformStreamDefaultController.prototype); + let transformAlgorithm; + let flushAlgorithm; + let cancelAlgorithm; + if (transformer.transform !== undefined) { + transformAlgorithm = chunk => transformer.transform(chunk, controller); + } + else { + transformAlgorithm = chunk => { + try { + TransformStreamDefaultControllerEnqueue(controller, chunk); + return promiseResolvedWith(undefined); + } + catch (transformResultE) { + return promiseRejectedWith(transformResultE); + } + }; + } + if (transformer.flush !== undefined) { + flushAlgorithm = () => transformer.flush(controller); + } + else { + flushAlgorithm = () => promiseResolvedWith(undefined); + } + if (transformer.cancel !== undefined) { + cancelAlgorithm = reason => transformer.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm); + } + function TransformStreamDefaultControllerClearAlgorithms(controller) { + controller._transformAlgorithm = undefined; + controller._flushAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + } + function TransformStreamDefaultControllerEnqueue(controller, chunk) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) { + throw new TypeError('Readable side is not in a state that permits enqueue'); + } + // We throttle transform invocations based on the backpressure of the ReadableStream, but we still + // accept TransformStreamDefaultControllerEnqueue() calls. + try { + ReadableStreamDefaultControllerEnqueue(readableController, chunk); + } + catch (e) { + // This happens when readableStrategy.size() throws. + TransformStreamErrorWritableAndUnblockWrite(stream, e); + throw stream._readable._storedError; + } + const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController); + if (backpressure !== stream._backpressure) { + TransformStreamSetBackpressure(stream, true); + } + } + function TransformStreamDefaultControllerError(controller, e) { + TransformStreamError(controller._controlledTransformStream, e); + } + function TransformStreamDefaultControllerPerformTransform(controller, chunk) { + const transformPromise = controller._transformAlgorithm(chunk); + return transformPromiseWith(transformPromise, undefined, r => { + TransformStreamError(controller._controlledTransformStream, r); + throw r; + }); + } + function TransformStreamDefaultControllerTerminate(controller) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + ReadableStreamDefaultControllerClose(readableController); + const error = new TypeError('TransformStream terminated'); + TransformStreamErrorWritableAndUnblockWrite(stream, error); + } + // TransformStreamDefaultSink Algorithms + function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) { + const controller = stream._transformStreamController; + if (stream._backpressure) { + const backpressureChangePromise = stream._backpressureChangePromise; + return transformPromiseWith(backpressureChangePromise, () => { + const writable = stream._writable; + const state = writable._state; + if (state === 'erroring') { + throw writable._storedError; + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + }); + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + } + function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally, + // we don't run the _cancelAlgorithm again. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerError(readable._readableStreamController, reason); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + function TransformStreamDefaultSinkCloseAlgorithm(stream) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally, + // we don't also run the _cancelAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const flushPromise = controller._flushAlgorithm(); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(flushPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerClose(readable._readableStreamController); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + // TransformStreamDefaultSource Algorithms + function TransformStreamDefaultSourcePullAlgorithm(stream) { + // Invariant. Enforced by the promises returned by start() and pull(). + TransformStreamSetBackpressure(stream, false); + // Prevent the next pull() call until there is backpressure. + return stream._backpressureChangePromise; + } + function TransformStreamDefaultSourceCancelAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._writable cannot change after construction, so caching it across a call to user code is safe. + const writable = stream._writable; + // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or + // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the + // _flushAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (writable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, writable._storedError); + } + else { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + // Helper functions for the TransformStreamDefaultController. + function defaultControllerBrandCheckException(name) { + return new TypeError(`TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`); + } + function defaultControllerFinishPromiseResolve(controller) { + if (controller._finishPromise_resolve === undefined) { + return; + } + controller._finishPromise_resolve(); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + function defaultControllerFinishPromiseReject(controller, reason) { + if (controller._finishPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(controller._finishPromise); + controller._finishPromise_reject(reason); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + // Helper functions for the TransformStream. + function streamBrandCheckException(name) { + return new TypeError(`TransformStream.prototype.${name} can only be used on a TransformStream`); + } + + exports.ByteLengthQueuingStrategy = ByteLengthQueuingStrategy; + exports.CountQueuingStrategy = CountQueuingStrategy; + exports.ReadableByteStreamController = ReadableByteStreamController; + exports.ReadableStream = ReadableStream; + exports.ReadableStreamBYOBReader = ReadableStreamBYOBReader; + exports.ReadableStreamBYOBRequest = ReadableStreamBYOBRequest; + exports.ReadableStreamDefaultController = ReadableStreamDefaultController; + exports.ReadableStreamDefaultReader = ReadableStreamDefaultReader; + exports.TransformStream = TransformStream; + exports.TransformStreamDefaultController = TransformStreamDefaultController; + exports.WritableStream = WritableStream; + exports.WritableStreamDefaultController = WritableStreamDefaultController; + exports.WritableStreamDefaultWriter = WritableStreamDefaultWriter; + +})); +//# sourceMappingURL=ponyfill.es2018.js.map diff --git a/node_modules/web-streams-polyfill/dist/ponyfill.es2018.js.map b/node_modules/web-streams-polyfill/dist/ponyfill.es2018.js.map new file mode 100644 index 00000000..6d107ac8 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/ponyfill.es2018.js.map @@ -0,0 +1 @@ +{"version":3,"file":"ponyfill.es2018.js","sources":["../src/utils.ts","../src/lib/helpers/miscellaneous.ts","../src/lib/helpers/webidl.ts","../src/lib/simple-queue.ts","../src/lib/abstract-ops/internal-methods.ts","../src/lib/readable-stream/generic-reader.ts","../src/stub/number-isfinite.ts","../src/stub/math-trunc.ts","../src/lib/validators/basic.ts","../src/lib/validators/readable-stream.ts","../src/lib/readable-stream/default-reader.ts","../src/target/es2018/stub/async-iterator-prototype.ts","../src/lib/readable-stream/async-iterator.ts","../src/stub/number-isnan.ts","../src/lib/abstract-ops/ecmascript.ts","../src/lib/abstract-ops/miscellaneous.ts","../src/lib/abstract-ops/queue-with-sizes.ts","../src/lib/helpers/array-buffer-view.ts","../src/lib/readable-stream/byte-stream-controller.ts","../src/lib/validators/reader-options.ts","../src/lib/readable-stream/byob-reader.ts","../src/lib/abstract-ops/queuing-strategy.ts","../src/lib/validators/queuing-strategy.ts","../src/lib/validators/underlying-sink.ts","../src/lib/validators/writable-stream.ts","../src/lib/abort-signal.ts","../src/lib/writable-stream.ts","../src/globals.ts","../src/stub/dom-exception.ts","../src/lib/readable-stream/pipe.ts","../src/lib/readable-stream/default-controller.ts","../src/lib/readable-stream/tee.ts","../src/lib/readable-stream/readable-stream-like.ts","../src/lib/readable-stream/from.ts","../src/lib/validators/underlying-source.ts","../src/lib/validators/iterator-options.ts","../src/lib/validators/pipe-options.ts","../src/lib/validators/readable-writable-pair.ts","../src/lib/readable-stream.ts","../src/lib/validators/queuing-strategy-init.ts","../src/lib/byte-length-queuing-strategy.ts","../src/lib/count-queuing-strategy.ts","../src/lib/validators/transformer.ts","../src/lib/transform-stream.ts"],"sourcesContent":["export function noop(): undefined {\n return undefined;\n}\n","import { noop } from '../../utils';\nimport { AssertionError } from '../../stub/assert';\n\nexport function typeIsObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport const rethrowAssertionErrorRejection: (e: any) => void =\n DEBUG ? e => {\n // Used throughout the reference implementation, as `.catch(rethrowAssertionErrorRejection)`, to ensure any errors\n // get shown. There are places in the spec where we do promise transformations and purposefully ignore or don't\n // expect any errors, but assertion errors are always problematic.\n if (e && e instanceof AssertionError) {\n setTimeout(() => {\n throw e;\n }, 0);\n }\n } : noop;\n\nexport function setFunctionName(fn: Function, name: string): void {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n } catch {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n}\n","import { rethrowAssertionErrorRejection } from './miscellaneous';\nimport assert from '../../stub/assert';\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\n\n// https://webidl.spec.whatwg.org/#a-new-promise\nexport function newPromise(executor: (\n resolve: (value: T | PromiseLike) => void,\n reject: (reason?: any) => void\n) => void): Promise {\n return new originalPromise(executor);\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-resolved-with\nexport function promiseResolvedWith(value: T | PromiseLike): Promise {\n return newPromise(resolve => resolve(value));\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-rejected-with\nexport function promiseRejectedWith(reason: any): Promise {\n return originalPromiseReject(reason);\n}\n\nexport function PerformPromiseThen(\n promise: Promise,\n onFulfilled?: (value: T) => TResult1 | PromiseLike,\n onRejected?: (reason: any) => TResult2 | PromiseLike): Promise {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected) as Promise;\n}\n\n// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n// from that handler. To prevent this, return null instead of void from all handlers.\n// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\nexport function uponPromise(\n promise: Promise,\n onFulfilled?: (value: T) => null | PromiseLike,\n onRejected?: (reason: any) => null | PromiseLike): void {\n PerformPromiseThen(\n PerformPromiseThen(promise, onFulfilled, onRejected),\n undefined,\n rethrowAssertionErrorRejection\n );\n}\n\nexport function uponFulfillment(promise: Promise, onFulfilled: (value: T) => null | PromiseLike): void {\n uponPromise(promise, onFulfilled);\n}\n\nexport function uponRejection(promise: Promise, onRejected: (reason: any) => null | PromiseLike): void {\n uponPromise(promise, undefined, onRejected);\n}\n\nexport function transformPromiseWith(\n promise: Promise,\n fulfillmentHandler?: (value: T) => TResult1 | PromiseLike,\n rejectionHandler?: (reason: any) => TResult2 | PromiseLike): Promise {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\n\nexport function setPromiseIsHandledToTrue(promise: Promise): void {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\nlet _queueMicrotask: (callback: () => void) => void = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n } else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n};\n\nexport { _queueMicrotask as queueMicrotask };\n\nexport function reflectCall(F: (this: T, ...fnArgs: A) => R, V: T, args: A): R {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n}\n\nexport function promiseCall(F: (this: T, ...fnArgs: A) => R | PromiseLike,\n V: T,\n args: A): Promise {\n assert(typeof F === 'function');\n assert(V !== undefined);\n assert(Array.isArray(args));\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n } catch (value) {\n return promiseRejectedWith(value);\n }\n}\n","import assert from '../stub/assert';\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n\ninterface Node {\n _elements: T[];\n _next: Node | undefined;\n}\n\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nexport class SimpleQueue {\n private _front: Node;\n private _back: Node;\n private _cursor = 0;\n private _size = 0;\n\n constructor() {\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n\n get length(): number {\n return this._size;\n }\n\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element: T): void {\n const oldBack = this._back;\n let newBack = oldBack;\n assert(oldBack._next === undefined);\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n assert(elements.length === QUEUE_MAX_ARRAY_SIZE);\n assert(oldFront._next !== undefined);\n newFront = oldFront._next!;\n newCursor = 0;\n }\n\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined!;\n\n return element;\n }\n\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback: (element: T) => void): void {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n assert(node._next !== undefined);\n assert(i === QUEUE_MAX_ARRAY_SIZE);\n node = node._next!;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n}\n","export const AbortSteps = Symbol('[[AbortSteps]]');\nexport const ErrorSteps = Symbol('[[ErrorSteps]]');\nexport const CancelSteps = Symbol('[[CancelSteps]]');\nexport const PullSteps = Symbol('[[PullSteps]]');\nexport const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n","import assert from '../../stub/assert';\nimport { ReadableStream, ReadableStreamCancel, type ReadableStreamReader } from '../readable-stream';\nimport { newPromise, setPromiseIsHandledToTrue } from '../helpers/webidl';\nimport { ReleaseSteps } from '../abstract-ops/internal-methods';\n\nexport function ReadableStreamReaderGenericInitialize(reader: ReadableStreamReader, stream: ReadableStream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n } else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n } else {\n assert(stream._state === 'errored');\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n}\n\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\n\nexport function ReadableStreamReaderGenericCancel(reader: ReadableStreamReader, reason: any): Promise {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n return ReadableStreamCancel(stream, reason);\n}\n\nexport function ReadableStreamReaderGenericRelease(reader: ReadableStreamReader) {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n assert(stream._reader === reader);\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n } else {\n defaultReaderClosedPromiseResetToRejected(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n\n stream._readableStreamController[ReleaseSteps]();\n\n stream._reader = undefined;\n reader._ownerReadableStream = undefined!;\n}\n\n// Helper functions for the readers.\n\nexport function readerLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nexport function defaultReaderClosedPromiseInitialize(reader: ReadableStreamReader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n}\n\nexport function defaultReaderClosedPromiseInitializeAsRejected(reader: ReadableStreamReader, reason: any) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseInitializeAsResolved(reader: ReadableStreamReader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n}\n\nexport function defaultReaderClosedPromiseReject(reader: ReadableStreamReader, reason: any) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n\nexport function defaultReaderClosedPromiseResetToRejected(reader: ReadableStreamReader, reason: any) {\n assert(reader._closedPromise_resolve === undefined);\n assert(reader._closedPromise_reject === undefined);\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseResolve(reader: ReadableStreamReader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite: typeof Number.isFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n};\n\nexport default NumberIsFinite;\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc: typeof Math.trunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\nexport default MathTrunc;\n","import NumberIsFinite from '../../stub/number-isfinite';\nimport MathTrunc from '../../stub/math-trunc';\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nexport function isDictionary(x: any): x is object | null {\n return typeof x === 'object' || typeof x === 'function';\n}\n\nexport function assertDictionary(obj: unknown,\n context: string): asserts obj is object | null | undefined {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport type AnyFunction = (...args: any[]) => any;\n\n// https://heycam.github.io/webidl/#idl-callback-functions\nexport function assertFunction(x: unknown, context: string): asserts x is AnyFunction {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-object\nexport function isObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport function assertObject(x: unknown,\n context: string): asserts x is object {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport function assertRequiredArgument(x: T | undefined,\n position: number,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n}\n\nexport function assertRequiredField(x: T | undefined,\n field: string,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nexport function convertUnrestrictedDouble(value: unknown): number {\n return Number(value);\n}\n\nfunction censorNegativeZero(x: number): number {\n return x === 0 ? 0 : x;\n}\n\nfunction integerPart(x: number): number {\n return censorNegativeZero(MathTrunc(x));\n}\n\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nexport function convertUnsignedLongLongWithEnforceRange(value: unknown, context: string): number {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n\n let x = Number(value);\n x = censorNegativeZero(x);\n\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n\n x = integerPart(x);\n\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n\n return x;\n}\n","import { IsReadableStream, ReadableStream } from '../readable-stream';\n\nexport function assertReadableStream(x: unknown, context: string): asserts x is ReadableStream {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, ReadableStream } from '../readable-stream';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { PullSteps } from '../abstract-ops/internal-methods';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\n\n/**\n * A result returned by {@link ReadableStreamDefaultReader.read}.\n *\n * @public\n */\nexport type ReadableStreamDefaultReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value?: undefined;\n}\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamDefaultReader(stream: ReadableStream): ReadableStreamDefaultReader {\n return new ReadableStreamDefaultReader(stream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadRequest(stream: ReadableStream,\n readRequest: ReadRequest): void {\n assert(IsReadableStreamDefaultReader(stream._reader));\n assert(stream._state === 'readable');\n\n (stream._reader! as ReadableStreamDefaultReader)._readRequests.push(readRequest);\n}\n\nexport function ReadableStreamFulfillReadRequest(stream: ReadableStream, chunk: R | undefined, done: boolean) {\n const reader = stream._reader as ReadableStreamDefaultReader;\n\n assert(reader._readRequests.length > 0);\n\n const readRequest = reader._readRequests.shift()!;\n if (done) {\n readRequest._closeSteps();\n } else {\n readRequest._chunkSteps(chunk!);\n }\n}\n\nexport function ReadableStreamGetNumReadRequests(stream: ReadableStream): number {\n return (stream._reader as ReadableStreamDefaultReader)._readRequests.length;\n}\n\nexport function ReadableStreamHasDefaultReader(stream: ReadableStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadRequest {\n _chunkSteps(chunk: R): void;\n\n _closeSteps(): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamDefaultReader {\n /** @internal */\n _ownerReadableStream!: ReadableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(): Promise> {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamDefaultReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamDefaultReader(x: any): x is ReadableStreamDefaultReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultReader;\n}\n\nexport function ReadableStreamDefaultReaderRead(reader: ReadableStreamDefaultReader,\n readRequest: ReadRequest): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n } else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n } else {\n assert(stream._state === 'readable');\n stream._readableStreamController[PullSteps](readRequest as ReadRequest);\n }\n}\n\nexport function ReadableStreamDefaultReaderRelease(reader: ReadableStreamDefaultReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n}\n\nexport function ReadableStreamDefaultReaderErrorReadRequests(reader: ReadableStreamDefaultReader, e: any) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nfunction defaultReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n","/// \n\n/* eslint-disable @typescript-eslint/no-empty-function */\nexport const AsyncIteratorPrototype: AsyncIterable =\n Object.getPrototypeOf(Object.getPrototypeOf(async function* (): AsyncIterableIterator {}).prototype);\n","/// \n\nimport { ReadableStream } from '../readable-stream';\nimport {\n AcquireReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadableStreamDefaultReadResult,\n type ReadRequest\n} from './default-reader';\nimport { ReadableStreamReaderGenericCancel, ReadableStreamReaderGenericRelease } from './generic-reader';\nimport assert from '../../stub/assert';\nimport { AsyncIteratorPrototype } from '@@target/stub/async-iterator-prototype';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n queueMicrotask,\n transformPromiseWith\n} from '../helpers/webidl';\n\n/**\n * An async iterator returned by {@link ReadableStream.values}.\n *\n * @public\n */\nexport interface ReadableStreamAsyncIterator extends AsyncIterableIterator {\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nexport class ReadableStreamAsyncIteratorImpl {\n private readonly _reader: ReadableStreamDefaultReader;\n private readonly _preventCancel: boolean;\n private _ongoingPromise: Promise> | undefined = undefined;\n private _isFinished = false;\n\n constructor(reader: ReadableStreamDefaultReader, preventCancel: boolean) {\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n\n next(): Promise> {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n\n return(value: any): Promise> {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n\n private _nextSteps(): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n\n private _returnSteps(value: any): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n assert(reader._readRequests.length === 0);\n\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n}\n\ninterface ReadableStreamAsyncIteratorInstance extends ReadableStreamAsyncIterator {\n /** @interal */\n _asyncIteratorImpl: ReadableStreamAsyncIteratorImpl;\n\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nconst ReadableStreamAsyncIteratorPrototype: ReadableStreamAsyncIteratorInstance = {\n next(this: ReadableStreamAsyncIteratorInstance): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n\n return(this: ReadableStreamAsyncIteratorInstance, value: any): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n} as any;\nObject.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamAsyncIterator(stream: ReadableStream,\n preventCancel: boolean): ReadableStreamAsyncIterator {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator: ReadableStreamAsyncIteratorInstance = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n}\n\nfunction IsReadableStreamAsyncIterator(x: any): x is ReadableStreamAsyncIterator {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n\n try {\n // noinspection SuspiciousTypeOfGuard\n return (x as ReadableStreamAsyncIteratorInstance)._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n } catch {\n return false;\n }\n}\n\n// Helper functions for the ReadableStream.\n\nfunction streamAsyncIteratorBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN: typeof Number.isNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n};\n\nexport default NumberIsNaN;\n","import { reflectCall } from 'lib/helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport assert from '../../stub/assert';\n\ndeclare global {\n interface ArrayBuffer {\n readonly detached: boolean;\n\n transfer(): ArrayBuffer;\n }\n\n function structuredClone(value: T, options: { transfer: ArrayBuffer[] }): T;\n}\n\nexport function CreateArrayFromList(elements: T): T {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice() as T;\n}\n\nexport function CopyDataBlockBytes(dest: ArrayBuffer,\n destOffset: number,\n src: ArrayBuffer,\n srcOffset: number,\n n: number) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n\nexport let TransferArrayBuffer = (O: ArrayBuffer): ArrayBuffer => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n } else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n } else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n};\n\nexport function CanTransferArrayBuffer(O: ArrayBuffer): boolean {\n return !IsDetachedBuffer(O);\n}\n\nexport let IsDetachedBuffer = (O: ArrayBuffer): boolean => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n } else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n};\n\nexport function ArrayBufferSlice(buffer: ArrayBuffer, begin: number, end: number): ArrayBuffer {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n}\n\nexport type MethodName = {\n [P in keyof T]: T[P] extends Function | undefined ? P : never;\n}[keyof T];\n\nexport function GetMethod>(receiver: T, prop: K): T[K] | undefined {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n}\n\nexport interface SyncIteratorRecord {\n iterator: Iterator,\n nextMethod: Iterator['next'],\n done: boolean;\n}\n\nexport interface AsyncIteratorRecord {\n iterator: AsyncIterator,\n nextMethod: AsyncIterator['next'],\n done: boolean;\n}\n\nexport type SyncOrAsyncIteratorRecord = SyncIteratorRecord | AsyncIteratorRecord;\n\nexport function CreateAsyncFromSyncIterator(syncIteratorRecord: SyncIteratorRecord): AsyncIteratorRecord {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n}\n\n// Aligns with core-js/modules/es.symbol.async-iterator.js\nexport const SymbolAsyncIterator: (typeof Symbol)['asyncIterator'] =\n Symbol.asyncIterator ??\n Symbol.for?.('Symbol.asyncIterator') ??\n '@@asyncIterator';\n\nexport type SyncOrAsyncIterable = Iterable | AsyncIterable;\nexport type SyncOrAsyncIteratorMethod = () => (Iterator | AsyncIterator);\n\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint: 'async',\n method?: SyncOrAsyncIteratorMethod\n): AsyncIteratorRecord;\nfunction GetIterator(\n obj: Iterable,\n hint: 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncIteratorRecord;\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint = 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncOrAsyncIteratorRecord {\n assert(hint === 'sync' || hint === 'async');\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj as AsyncIterable, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj as Iterable, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj as Iterable, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n } else {\n method = GetMethod(obj as Iterable, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false } as SyncOrAsyncIteratorRecord;\n}\n\nexport { GetIterator };\n\nexport function IteratorNext(iteratorRecord: AsyncIteratorRecord): Promise> {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n}\n\nexport function IteratorComplete(\n iterResult: IteratorResult\n): iterResult is IteratorReturnResult {\n assert(typeIsObject(iterResult));\n return Boolean(iterResult.done);\n}\n\nexport function IteratorValue(iterResult: IteratorYieldResult): T {\n assert(typeIsObject(iterResult));\n return iterResult.value;\n}\n","import NumberIsNaN from '../../stub/number-isnan';\nimport { ArrayBufferSlice } from './ecmascript';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function IsNonNegativeNumber(v: number): boolean {\n if (typeof v !== 'number') {\n return false;\n }\n\n if (NumberIsNaN(v)) {\n return false;\n }\n\n if (v < 0) {\n return false;\n }\n\n return true;\n}\n\nexport function CloneAsUint8Array(O: NonShared): NonShared {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer) as NonShared;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsNonNegativeNumber } from './miscellaneous';\n\nexport interface QueueContainer {\n _queue: SimpleQueue;\n _queueTotalSize: number;\n}\n\nexport interface QueuePair {\n value: T;\n size: number;\n}\n\nexport function DequeueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.shift()!;\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n\n return pair.value;\n}\n\nexport function EnqueueValueWithSize(container: QueueContainer>, value: T, size: number) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n}\n\nexport function PeekQueueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.peek();\n return pair.value;\n}\n\nexport function ResetQueue(container: QueueContainer) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n}\n","export type TypedArray =\n | Int8Array\n | Uint8Array\n | Uint8ClampedArray\n | Int16Array\n | Uint16Array\n | Int32Array\n | Uint32Array\n | Float32Array\n | Float64Array;\n\nexport type NonShared = T & {\n buffer: ArrayBuffer;\n}\n\nexport interface ArrayBufferViewConstructor {\n new(buffer: ArrayBuffer, byteOffset: number, length?: number): T;\n\n readonly prototype: T;\n}\n\nexport interface TypedArrayConstructor extends ArrayBufferViewConstructor {\n readonly BYTES_PER_ELEMENT: number;\n}\n\nexport type DataViewConstructor = ArrayBufferViewConstructor;\n\nfunction isDataViewConstructor(ctor: Function): ctor is DataViewConstructor {\n return ctor === DataView;\n}\n\nexport function isDataView(view: ArrayBufferView): view is DataView {\n return isDataViewConstructor(view.constructor);\n}\n\nexport function arrayBufferViewElementSize(ctor: ArrayBufferViewConstructor): number {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return (ctor as unknown as TypedArrayConstructor).BYTES_PER_ELEMENT;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n IsReadableStreamDefaultReader,\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n ReadableStreamHasDefaultReader,\n type ReadRequest\n} from './default-reader';\nimport {\n ReadableStreamAddReadIntoRequest,\n ReadableStreamFulfillReadIntoRequest,\n ReadableStreamGetNumReadIntoRequests,\n ReadableStreamHasBYOBReader,\n type ReadIntoRequest\n} from './byob-reader';\nimport NumberIsInteger from '../../stub/number-isinteger';\nimport {\n IsReadableStreamLocked,\n type ReadableByteStream,\n ReadableStreamClose,\n ReadableStreamError\n} from '../readable-stream';\nimport type { ValidatedUnderlyingByteSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport {\n ArrayBufferSlice,\n CanTransferArrayBuffer,\n CopyDataBlockBytes,\n IsDetachedBuffer,\n TransferArrayBuffer\n} from '../abstract-ops/ecmascript';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\nimport { assertRequiredArgument, convertUnsignedLongLongWithEnforceRange } from '../validators/basic';\nimport {\n type ArrayBufferViewConstructor,\n arrayBufferViewElementSize,\n type NonShared,\n type TypedArrayConstructor\n} from '../helpers/array-buffer-view';\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nexport class ReadableStreamBYOBRequest {\n /** @internal */\n _associatedReadableByteStreamController!: ReadableByteStreamController;\n /** @internal */\n _view!: NonShared | null;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view(): ArrayBufferView | null {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n\n return this._view;\n }\n\n /**\n * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into\n * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer.\n *\n * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer\n * modifiable.\n */\n respond(bytesWritten: number): void;\n respond(bytesWritten: number | undefined): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(this._view!.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n\n assert(this._view!.byteLength > 0);\n assert(this._view!.buffer.byteLength > 0);\n\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n\n /**\n * Indicates to the associated readable byte stream that instead of writing into\n * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`,\n * which will be given to the consumer of the readable byte stream.\n *\n * After this method is called, `view` will be transferred and no longer modifiable.\n */\n respondWithNewView(view: ArrayBufferView): void;\n respondWithNewView(view: NonShared): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n}\n\ninterface ByteQueueElement {\n buffer: ArrayBuffer;\n byteOffset: number;\n byteLength: number;\n}\n\ntype PullIntoDescriptor = NonShared> =\n DefaultPullIntoDescriptor\n | BYOBPullIntoDescriptor;\n\ninterface DefaultPullIntoDescriptor {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: TypedArrayConstructor;\n readerType: 'default' | 'none';\n}\n\ninterface BYOBPullIntoDescriptor = NonShared> {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: ArrayBufferViewConstructor;\n readerType: 'byob' | 'none';\n}\n\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableByteStreamController {\n /** @internal */\n _controlledReadableByteStream!: ReadableByteStream;\n /** @internal */\n _queue!: SimpleQueue;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n /** @internal */\n _autoAllocateChunkSize: number | undefined;\n /** @internal */\n _byobRequest: ReadableStreamBYOBRequest | null;\n /** @internal */\n _pendingPullIntos!: SimpleQueue;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest(): ReadableStreamBYOBRequest | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n\n ReadableByteStreamControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk chunk in the controlled readable stream.\n * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown.\n */\n enqueue(chunk: ArrayBufferView): void;\n enqueue(chunk: NonShared): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n\n ReadableByteStreamControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n\n ResetQueue(this);\n\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest>): void {\n const stream = this._controlledReadableByteStream;\n assert(ReadableStreamHasDefaultReader(stream));\n\n if (this._queueTotalSize > 0) {\n assert(ReadableStreamGetNumReadRequests(stream) === 0);\n\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer: ArrayBuffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n } catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n\n const pullIntoDescriptor: DefaultPullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n}\n\nObject.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableByteStreamController.prototype.close, 'close');\nsetFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableByteStreamController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableByteStreamController.\n\nexport function IsReadableByteStreamController(x: any): x is ReadableByteStreamController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n\n return x instanceof ReadableByteStreamController;\n}\n\nfunction IsReadableStreamBYOBRequest(x: any): x is ReadableStreamBYOBRequest {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBRequest;\n}\n\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller: ReadableByteStreamController): void {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller: ReadableByteStreamController) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n}\n\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor>(\n stream: ReadableByteStream,\n pullIntoDescriptor: PullIntoDescriptor\n) {\n assert(stream._state !== 'errored');\n assert(pullIntoDescriptor.readerType !== 'none');\n\n let done = false;\n if (stream._state === 'closed') {\n assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);\n done = true;\n }\n\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView as unknown as NonShared, done);\n } else {\n assert(pullIntoDescriptor.readerType === 'byob');\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n}\n\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor>(\n pullIntoDescriptor: PullIntoDescriptor\n): T {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n\n assert(bytesFilled <= pullIntoDescriptor.byteLength);\n assert(bytesFilled % elementSize === 0);\n\n return new pullIntoDescriptor.viewConstructor(\n pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize) as T;\n}\n\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n}\n\nfunction ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n } catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n}\n\nfunction ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.readerType === 'none');\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n firstDescriptor.buffer,\n firstDescriptor.byteOffset,\n firstDescriptor.bytesFilled\n );\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n}\n\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller: ReadableByteStreamController,\n pullIntoDescriptor: PullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize,\n pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n\n const queue = controller._queue;\n\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n } else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n\n if (!ready) {\n assert(controller._queueTotalSize === 0);\n assert(pullIntoDescriptor.bytesFilled > 0);\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n }\n\n return ready;\n}\n\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller: ReadableByteStreamController,\n size: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);\n assert(controller._byobRequest === null);\n pullIntoDescriptor.bytesFilled += size;\n}\n\nfunction ReadableByteStreamControllerHandleQueueDrain(controller: ReadableByteStreamController) {\n assert(controller._controlledReadableByteStream._state === 'readable');\n\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n } else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n}\n\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller: ReadableByteStreamController) {\n if (controller._byobRequest === null) {\n return;\n }\n\n controller._byobRequest._associatedReadableByteStreamController = undefined!;\n controller._byobRequest._view = null!;\n controller._byobRequest = null;\n}\n\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller: ReadableByteStreamController) {\n assert(!controller._closeRequested);\n\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n assert(pullIntoDescriptor.readerType !== 'none');\n\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n ReadableByteStreamControllerCommitPullIntoDescriptor(\n controller._controlledReadableByteStream,\n pullIntoDescriptor\n );\n }\n }\n}\n\nfunction ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller: ReadableByteStreamController) {\n const reader = controller._controlledReadableByteStream._reader;\n assert(IsReadableStreamDefaultReader(reader));\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n}\n\nexport function ReadableByteStreamControllerPullInto>(\n controller: ReadableByteStreamController,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = controller._controlledReadableByteStream;\n\n const ctor = view.constructor as ArrayBufferViewConstructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n\n const { byteOffset, byteLength } = view;\n\n const minimumFill = min * elementSize;\n assert(minimumFill >= elementSize && minimumFill <= byteLength);\n assert(minimumFill % elementSize === 0);\n\n let buffer: ArrayBuffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n } catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n\n const pullIntoDescriptor: BYOBPullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInClosedState(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.bytesFilled % firstDescriptor.elementSize === 0);\n\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n}\n\nfunction ReadableByteStreamControllerRespondInReadableState(controller: ReadableByteStreamController,\n bytesWritten: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n pullIntoDescriptor.buffer,\n end - remainderSize,\n remainderSize\n );\n }\n\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInternal(controller: ReadableByteStreamController, bytesWritten: number) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n assert(CanTransferArrayBuffer(firstDescriptor.buffer));\n\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n assert(bytesWritten === 0);\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n } else {\n assert(state === 'readable');\n assert(bytesWritten > 0);\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerShiftPendingPullInto(\n controller: ReadableByteStreamController\n): PullIntoDescriptor {\n assert(controller._byobRequest === null);\n const descriptor = controller._pendingPullIntos.shift()!;\n return descriptor;\n}\n\nfunction ReadableByteStreamControllerShouldCallPull(controller: ReadableByteStreamController): boolean {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return false;\n }\n\n if (controller._closeRequested) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableByteStreamControllerClearAlgorithms(controller: ReadableByteStreamController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\n\nexport function ReadableByteStreamControllerClose(controller: ReadableByteStreamController) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n\n return;\n }\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n throw e;\n }\n }\n\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n}\n\nexport function ReadableByteStreamControllerEnqueue(\n controller: ReadableByteStreamController,\n chunk: NonShared\n) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError(\n 'The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk'\n );\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n assert(controller._pendingPullIntos.length === 0);\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n } else {\n assert(controller._queue.length === 0);\n if (controller._pendingPullIntos.length > 0) {\n assert(controller._pendingPullIntos.peek().readerType === 'default');\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView as NonShared, false);\n }\n } else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n } else {\n assert(!IsReadableStreamLocked(stream));\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableByteStreamControllerError(controller: ReadableByteStreamController, e: any) {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableByteStreamControllerFillReadRequestFromQueue(\n controller: ReadableByteStreamController,\n readRequest: ReadRequest>\n) {\n assert(controller._queueTotalSize > 0);\n\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view as NonShared);\n}\n\nexport function ReadableByteStreamControllerGetBYOBRequest(\n controller: ReadableByteStreamController\n): ReadableStreamBYOBRequest | null {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer,\n firstDescriptor.byteOffset + firstDescriptor.bytesFilled,\n firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n\n const byobRequest: ReadableStreamBYOBRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view as NonShared);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n}\n\nfunction ReadableByteStreamControllerGetDesiredSize(controller: ReadableByteStreamController): number | null {\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nexport function ReadableByteStreamControllerRespond(controller: ReadableByteStreamController, bytesWritten: number) {\n assert(controller._pendingPullIntos.length > 0);\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n}\n\nexport function ReadableByteStreamControllerRespondWithNewView(controller: ReadableByteStreamController,\n view: NonShared) {\n assert(controller._pendingPullIntos.length > 0);\n assert(!IsDetachedBuffer(view.buffer));\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (view.byteLength === 0) {\n throw new TypeError(\n 'The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'\n );\n }\n }\n\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n}\n\nexport function SetUpReadableByteStreamController(stream: ReadableByteStream,\n controller: ReadableByteStreamController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n autoAllocateChunkSize: number | undefined) {\n assert(stream._readableStreamController === undefined);\n if (autoAllocateChunkSize !== undefined) {\n assert(NumberIsInteger(autoAllocateChunkSize));\n assert(autoAllocateChunkSize > 0);\n }\n\n controller._controlledReadableByteStream = stream;\n\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._byobRequest = null;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._closeRequested = false;\n controller._started = false;\n\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n\n controller._pendingPullIntos = new SimpleQueue();\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableByteStreamControllerFromUnderlyingSource(\n stream: ReadableByteStream,\n underlyingByteSource: ValidatedUnderlyingByteSource,\n highWaterMark: number\n) {\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n\n SetUpReadableByteStreamController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize\n );\n}\n\nfunction SetUpReadableStreamBYOBRequest(request: ReadableStreamBYOBRequest,\n controller: ReadableByteStreamController,\n view: NonShared) {\n assert(IsReadableByteStreamController(controller));\n assert(typeof view === 'object');\n assert(ArrayBuffer.isView(view));\n assert(!IsDetachedBuffer(view.buffer));\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n}\n\n// Helper functions for the ReadableStreamBYOBRequest.\n\nfunction byobRequestBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n}\n\n// Helper functions for the ReadableByteStreamController.\n\nfunction byteStreamControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n}\n","import { assertDictionary, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from '../readable-stream/reader-options';\n\nexport function convertReaderOptions(options: ReadableStreamGetReaderOptions | null | undefined,\n context: string): ReadableStreamGetReaderOptions {\n assertDictionary(options, context);\n const mode = options?.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n}\n\nfunction convertReadableStreamReaderMode(mode: string, context: string): 'byob' {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n}\n\nexport function convertByobReadOptions(\n options: ReadableStreamBYOBReaderReadOptions | null | undefined,\n context: string\n): ValidatedReadableStreamBYOBReaderReadOptions {\n assertDictionary(options, context);\n const min = options?.min ?? 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(\n min,\n `${context} has member 'min' that`\n )\n };\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, type ReadableByteStream, type ReadableStream } from '../readable-stream';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamController,\n ReadableByteStreamControllerPullInto\n} from './byte-stream-controller';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\nimport { IsDetachedBuffer } from '../abstract-ops/ecmascript';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from './reader-options';\nimport { convertByobReadOptions } from '../validators/reader-options';\nimport { isDataView, type NonShared, type TypedArray } from '../helpers/array-buffer-view';\n\n/**\n * A result returned by {@link ReadableStreamBYOBReader.read}.\n *\n * @public\n */\nexport type ReadableStreamBYOBReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value: T | undefined;\n};\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamBYOBReader(stream: ReadableByteStream): ReadableStreamBYOBReader {\n return new ReadableStreamBYOBReader(stream as ReadableStream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadIntoRequest>(\n stream: ReadableByteStream,\n readIntoRequest: ReadIntoRequest\n): void {\n assert(IsReadableStreamBYOBReader(stream._reader));\n assert(stream._state === 'readable' || stream._state === 'closed');\n\n (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);\n}\n\nexport function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,\n chunk: ArrayBufferView,\n done: boolean) {\n const reader = stream._reader as ReadableStreamBYOBReader;\n\n assert(reader._readIntoRequests.length > 0);\n\n const readIntoRequest = reader._readIntoRequests.shift()!;\n if (done) {\n readIntoRequest._closeSteps(chunk);\n } else {\n readIntoRequest._chunkSteps(chunk);\n }\n}\n\nexport function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {\n return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;\n}\n\nexport function ReadableStreamHasBYOBReader(stream: ReadableByteStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadIntoRequest> {\n _chunkSteps(chunk: T): void;\n\n _closeSteps(chunk: T | undefined): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamBYOBReader {\n /** @internal */\n _ownerReadableStream!: ReadableByteStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readIntoRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readIntoRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Attempts to reads bytes into view, and returns a promise resolved with the result.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(\n view: T,\n options?: ReadableStreamBYOBReaderReadOptions\n ): Promise>;\n read>(\n view: T,\n rawOptions: ReadableStreamBYOBReaderReadOptions | null | undefined = {}\n ): Promise> {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n\n let options: ValidatedReadableStreamBYOBReaderReadOptions;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > (view as unknown as TypedArray).length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n } else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamBYOBReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest: ReadIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamBYOBReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBReader;\n}\n\nexport function ReadableStreamBYOBReaderRead>(\n reader: ReadableStreamBYOBReader,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n } else {\n ReadableByteStreamControllerPullInto(\n stream._readableStreamController as ReadableByteStreamController,\n view,\n min,\n readIntoRequest\n );\n }\n}\n\nexport function ReadableStreamBYOBReaderRelease(reader: ReadableStreamBYOBReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n}\n\nexport function ReadableStreamBYOBReaderErrorReadIntoRequests(reader: ReadableStreamBYOBReader, e: any) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamBYOBReader.\n\nfunction byobReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport NumberIsNaN from '../../stub/number-isnan';\n\nexport function ExtractHighWaterMark(strategy: QueuingStrategy, defaultHWM: number): number {\n const { highWaterMark } = strategy;\n\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n\n return highWaterMark;\n}\n\nexport function ExtractSizeAlgorithm(strategy: QueuingStrategy): QueuingStrategySizeCallback {\n const { size } = strategy;\n\n if (!size) {\n return () => 1;\n }\n\n return size;\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport { assertDictionary, assertFunction, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategy(init: QueuingStrategy | null | undefined,\n context: string): QueuingStrategy {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n const size = init?.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n}\n\nfunction convertQueuingStrategySize(fn: QueuingStrategySizeCallback,\n context: string): QueuingStrategySizeCallback {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from '../writable-stream/underlying-sink';\nimport { WritableStreamDefaultController } from '../writable-stream';\n\nexport function convertUnderlyingSink(original: UnderlyingSink | null,\n context: string): ValidatedUnderlyingSink {\n assertDictionary(original, context);\n const abort = original?.abort;\n const close = original?.close;\n const start = original?.start;\n const type = original?.type;\n const write = original?.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original!, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original!, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original!, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original!, `${context} has member 'write' that`),\n type\n };\n}\n\nfunction convertUnderlyingSinkAbortCallback(\n fn: UnderlyingSinkAbortCallback,\n original: UnderlyingSink,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSinkCloseCallback(\n fn: UnderlyingSinkCloseCallback,\n original: UnderlyingSink,\n context: string\n): () => Promise {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n}\n\nfunction convertUnderlyingSinkStartCallback(\n fn: UnderlyingSinkStartCallback,\n original: UnderlyingSink,\n context: string\n): UnderlyingSinkStartCallback {\n assertFunction(fn, context);\n return (controller: WritableStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSinkWriteCallback(\n fn: UnderlyingSinkWriteCallback,\n original: UnderlyingSink,\n context: string\n): (chunk: W, controller: WritableStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: W, controller: WritableStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n","import { IsWritableStream, WritableStream } from '../writable-stream';\n\nexport function assertWritableStream(x: unknown, context: string): asserts x is WritableStream {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n}\n","/**\n * A signal object that allows you to communicate with a request and abort it if required\n * via its associated `AbortController` object.\n *\n * @remarks\n * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @public\n */\nexport interface AbortSignal {\n /**\n * Whether the request is aborted.\n */\n readonly aborted: boolean;\n\n /**\n * If aborted, returns the reason for aborting.\n */\n readonly reason?: any;\n\n /**\n * Add an event listener to be triggered when this signal becomes aborted.\n */\n addEventListener(type: 'abort', listener: () => void): void;\n\n /**\n * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}.\n */\n removeEventListener(type: 'abort', listener: () => void): void;\n}\n\nexport function isAbortSignal(value: unknown): value is AbortSignal {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof (value as AbortSignal).aborted === 'boolean';\n } catch {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n}\n\n/**\n * A controller object that allows you to abort an `AbortSignal` when desired.\n *\n * @remarks\n * This interface is compatible with the `AbortController` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @internal\n */\nexport interface AbortController {\n readonly signal: AbortSignal;\n\n abort(reason?: any): void;\n}\n\ninterface AbortControllerConstructor {\n new(): AbortController;\n}\n\nconst supportsAbortController = typeof (AbortController as any) === 'function';\n\n/**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\nexport function createAbortController(): AbortController | undefined {\n if (supportsAbortController) {\n return new (AbortController as AbortControllerConstructor)();\n }\n return undefined;\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponPromise\n} from './helpers/webidl';\nimport {\n DequeueValue,\n EnqueueValueWithSize,\n PeekQueueValue,\n type QueuePair,\n ResetQueue\n} from './abstract-ops/queue-with-sizes';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { SimpleQueue } from './simple-queue';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { AbortSteps, ErrorSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from './writable-stream/underlying-sink';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertUnderlyingSink } from './validators/underlying-sink';\nimport { assertWritableStream } from './validators/writable-stream';\nimport { type AbortController, type AbortSignal, createAbortController } from './abort-signal';\n\ntype WritableStreamState = 'writable' | 'closed' | 'erroring' | 'errored';\n\ninterface WriteOrCloseRequest {\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n}\n\ntype WriteRequest = WriteOrCloseRequest;\ntype CloseRequest = WriteOrCloseRequest;\n\ninterface PendingAbortRequest {\n _promise: Promise;\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n _reason: any;\n _wasAlreadyErroring: boolean;\n}\n\n/**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\nclass WritableStream {\n /** @internal */\n _state!: WritableStreamState;\n /** @internal */\n _storedError: any;\n /** @internal */\n _writer: WritableStreamDefaultWriter | undefined;\n /** @internal */\n _writableStreamController!: WritableStreamDefaultController;\n /** @internal */\n _writeRequests!: SimpleQueue;\n /** @internal */\n _inFlightWriteRequest: WriteRequest | undefined;\n /** @internal */\n _closeRequest: CloseRequest | undefined;\n /** @internal */\n _inFlightCloseRequest: CloseRequest | undefined;\n /** @internal */\n _pendingAbortRequest: PendingAbortRequest | undefined;\n /** @internal */\n _backpressure!: boolean;\n\n constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSink: UnderlyingSink | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n } else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n\n InitializeWritableStream(this);\n\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked(): boolean {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsWritableStreamLocked(this);\n }\n\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('abort'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n\n return WritableStreamAbort(this, reason);\n }\n\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('close'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamClose(this);\n }\n\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter(): WritableStreamDefaultWriter {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('getWriter');\n }\n\n return AcquireWritableStreamDefaultWriter(this);\n }\n}\n\nObject.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(WritableStream.prototype.abort, 'abort');\nsetFunctionName(WritableStream.prototype.close, 'close');\nsetFunctionName(WritableStream.prototype.getWriter, 'getWriter');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n}\n\nexport {\n AcquireWritableStreamDefaultWriter,\n CreateWritableStream,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamDefaultControllerErrorIfNeeded,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite,\n WritableStreamCloseQueuedOrInFlight\n};\n\nexport type {\n UnderlyingSink,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkAbortCallback\n};\n\n// Abstract operations for the WritableStream.\n\nfunction AcquireWritableStreamDefaultWriter(stream: WritableStream): WritableStreamDefaultWriter {\n return new WritableStreamDefaultWriter(stream);\n}\n\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: WritableStream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n\n const controller: WritableStreamDefaultController = Object.create(WritableStreamDefaultController.prototype);\n\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm,\n abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n}\n\nfunction InitializeWritableStream(stream: WritableStream) {\n stream._state = 'writable';\n\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n\n stream._writer = undefined;\n\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined!;\n\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n}\n\nfunction IsWritableStream(x: unknown): x is WritableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n\n return x instanceof WritableStream;\n}\n\nfunction IsWritableStreamLocked(stream: WritableStream): boolean {\n assert(IsWritableStream(stream));\n\n if (stream._writer === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamAbort(stream: WritableStream, reason: any): Promise {\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n stream._writableStreamController._abortController?.abort(reason);\n\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state as WritableStreamState;\n\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined!,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest!._promise = promise;\n\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n\n return promise;\n}\n\nfunction WritableStreamClose(stream: WritableStream): Promise {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(\n `The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n\n assert(state === 'writable' || state === 'erroring');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const promise = newPromise((resolve, reject) => {\n const closeRequest: CloseRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._closeRequest = closeRequest;\n });\n\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n\n return promise;\n}\n\n// WritableStream API exposed for controllers.\n\nfunction WritableStreamAddWriteRequest(stream: WritableStream): Promise {\n assert(IsWritableStreamLocked(stream));\n assert(stream._state === 'writable');\n\n const promise = newPromise((resolve, reject) => {\n const writeRequest: WriteRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._writeRequests.push(writeRequest);\n });\n\n return promise;\n}\n\nfunction WritableStreamDealWithRejection(stream: WritableStream, error: any) {\n const state = stream._state;\n\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n\n assert(state === 'erroring');\n WritableStreamFinishErroring(stream);\n}\n\nfunction WritableStreamStartErroring(stream: WritableStream, reason: any) {\n assert(stream._storedError === undefined);\n assert(stream._state === 'writable');\n\n const controller = stream._writableStreamController;\n assert(controller !== undefined);\n\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n}\n\nfunction WritableStreamFinishErroring(stream: WritableStream) {\n assert(stream._state === 'erroring');\n assert(!WritableStreamHasOperationMarkedInFlight(stream));\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(\n promise,\n () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n },\n (reason: any) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n}\n\nfunction WritableStreamFinishInFlightWrite(stream: WritableStream) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n}\n\nfunction WritableStreamFinishInFlightWriteWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._reject(error);\n stream._inFlightWriteRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n WritableStreamDealWithRejection(stream, error);\n}\n\nfunction WritableStreamFinishInFlightClose(stream: WritableStream) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n\n const state = stream._state;\n\n assert(state === 'writable' || state === 'erroring');\n\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n\n stream._state = 'closed';\n\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n\n assert(stream._pendingAbortRequest === undefined);\n assert(stream._storedError === undefined);\n}\n\nfunction WritableStreamFinishInFlightCloseWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._reject(error);\n stream._inFlightCloseRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n}\n\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream: WritableStream): boolean {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamHasOperationMarkedInFlight(stream: WritableStream): boolean {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamMarkCloseRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightCloseRequest === undefined);\n assert(stream._closeRequest !== undefined);\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n}\n\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightWriteRequest === undefined);\n assert(stream._writeRequests.length !== 0);\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\n\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream: WritableStream) {\n assert(stream._state === 'errored');\n if (stream._closeRequest !== undefined) {\n assert(stream._inFlightCloseRequest === undefined);\n\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n}\n\nfunction WritableStreamUpdateBackpressure(stream: WritableStream, backpressure: boolean) {\n assert(stream._state === 'writable');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n } else {\n assert(!backpressure);\n\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n\n stream._backpressure = backpressure;\n}\n\n/**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\nexport class WritableStreamDefaultWriter {\n /** @internal */\n _ownerWritableStream: WritableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _closedPromiseState!: 'pending' | 'resolved' | 'rejected';\n /** @internal */\n _readyPromise!: Promise;\n /** @internal */\n _readyPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _readyPromise_reject?: (reason: any) => void;\n /** @internal */\n _readyPromiseState!: 'pending' | 'fulfilled' | 'rejected';\n\n constructor(stream: WritableStream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n\n this._ownerWritableStream = stream;\n stream._writer = this;\n\n const state = stream._state;\n\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n } else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n } else {\n assert(state === 'errored');\n\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize(): number | null {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n\n return this._readyPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamDefaultWriterClose(this);\n }\n\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock(): void {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return;\n }\n\n assert(stream._writer !== undefined);\n\n WritableStreamDefaultWriterRelease(this);\n }\n\n /**\n * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully,\n * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return\n * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes\n * errored before the writing process is initiated.\n *\n * Note that what \"success\" means is up to the underlying sink; it might indicate simply that the chunk has been\n * accepted, and not necessarily that it is safely saved to its ultimate destination.\n */\n write(chunk: W): Promise;\n write(chunk: W = undefined!): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n});\nsetFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\nsetFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\nsetFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\nsetFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n}\n\n// Abstract operations for the WritableStreamDefaultWriter.\n\nfunction IsWritableStreamDefaultWriter(x: any): x is WritableStreamDefaultWriter {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultWriter;\n}\n\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultWriterAbort(writer: WritableStreamDefaultWriter, reason: any) {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamAbort(stream, reason);\n}\n\nfunction WritableStreamDefaultWriterClose(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamClose(stream);\n}\n\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n return WritableStreamDefaultWriterClose(writer);\n}\n\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n } else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n } else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterGetDesiredSize(writer: WritableStreamDefaultWriter): number | null {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n\n if (state === 'closed') {\n return 0;\n }\n\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\n\nfunction WritableStreamDefaultWriterRelease(writer: WritableStreamDefaultWriter) {\n const stream = writer._ownerWritableStream;\n assert(stream !== undefined);\n assert(stream._writer === writer);\n\n const releasedError = new TypeError(\n `Writer was released and can no longer be used to monitor the stream's closedness`);\n\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n\n stream._writer = undefined;\n writer._ownerWritableStream = undefined!;\n}\n\nfunction WritableStreamDefaultWriterWrite(writer: WritableStreamDefaultWriter, chunk: W): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const controller = stream._writableStreamController;\n\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable');\n\n const promise = WritableStreamAddWriteRequest(stream);\n\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n\n return promise;\n}\n\nconst closeSentinel: unique symbol = {} as any;\n\ntype QueueRecord = W | typeof closeSentinel;\n\n/**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\nexport class WritableStreamDefaultController {\n /** @internal */\n _controlledWritableStream!: WritableStream;\n /** @internal */\n _queue!: SimpleQueue>>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _abortReason: any;\n /** @internal */\n _abortController: AbortController | undefined;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _writeAlgorithm!: (chunk: W) => Promise;\n /** @internal */\n _closeAlgorithm!: () => Promise;\n /** @internal */\n _abortAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason(): any {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('abortReason');\n }\n return this._abortReason;\n }\n\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal(): AbortSignal {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e: any = undefined): void {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n\n WritableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [AbortSteps](reason: any): Promise {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations implementing interface required by the WritableStream.\n\nfunction IsWritableStreamDefaultController(x: any): x is WritableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultController;\n}\n\nfunction SetUpWritableStreamDefaultController(stream: WritableStream,\n controller: WritableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(IsWritableStream(stream));\n assert(stream._writableStreamController === undefined);\n\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(\n startPromise,\n () => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n r => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n }\n );\n}\n\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream: WritableStream,\n underlyingSink: ValidatedUnderlyingSink,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let writeAlgorithm: (chunk: W) => Promise;\n let closeAlgorithm: () => Promise;\n let abortAlgorithm: (reason: any) => Promise;\n\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write!(chunk, controller);\n } else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close!();\n } else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort!(reason);\n } else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpWritableStreamDefaultController(\n stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\nfunction WritableStreamDefaultControllerClearAlgorithms(controller: WritableStreamDefaultController) {\n controller._writeAlgorithm = undefined!;\n controller._closeAlgorithm = undefined!;\n controller._abortAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\nfunction WritableStreamDefaultControllerClose(controller: WritableStreamDefaultController) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\nfunction WritableStreamDefaultControllerGetChunkSize(controller: WritableStreamDefaultController,\n chunk: W): number {\n try {\n return controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n}\n\nfunction WritableStreamDefaultControllerGetDesiredSize(controller: WritableStreamDefaultController): number {\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nfunction WritableStreamDefaultControllerWrite(controller: WritableStreamDefaultController,\n chunk: W,\n chunkSize: number) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\n// Abstract operations for the WritableStreamDefaultController.\n\nfunction WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n if (!controller._started) {\n return;\n }\n\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n\n const state = stream._state;\n assert(state !== 'closed' && state !== 'errored');\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n\n if (controller._queue.length === 0) {\n return;\n }\n\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n } else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n}\n\nfunction WritableStreamDefaultControllerErrorIfNeeded(controller: WritableStreamDefaultController, error: any) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n}\n\nfunction WritableStreamDefaultControllerProcessClose(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkCloseRequestInFlight(stream);\n\n DequeueValue(controller);\n assert(controller._queue.length === 0);\n\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(\n sinkClosePromise,\n () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n },\n reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerProcessWrite(controller: WritableStreamDefaultController, chunk: W) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(\n sinkWritePromise,\n () => {\n WritableStreamFinishInFlightWrite(stream);\n\n const state = stream._state;\n assert(state === 'writable' || state === 'erroring');\n\n DequeueValue(controller);\n\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerGetBackpressure(controller: WritableStreamDefaultController): boolean {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n}\n\n// A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultControllerError(controller: WritableStreamDefaultController, error: any) {\n const stream = controller._controlledWritableStream;\n\n assert(stream._state === 'writable');\n\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n}\n\n// Helper functions for the WritableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n}\n\n// Helper functions for the WritableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n}\n\n\n// Helper functions for the WritableStreamDefaultWriter.\n\nfunction defaultWriterBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n}\n\nfunction defaultWriterLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n}\n\nfunction defaultWriterClosedPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n}\n\nfunction defaultWriterClosedPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n}\n\nfunction defaultWriterClosedPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n}\n\nfunction defaultWriterClosedPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._closedPromise_resolve === undefined);\n assert(writer._closedPromise_reject === undefined);\n assert(writer._closedPromiseState !== 'pending');\n\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n}\n\nfunction defaultWriterReadyPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n}\n\nfunction defaultWriterReadyPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n}\n\nfunction defaultWriterReadyPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n}\n\nfunction defaultWriterReadyPromiseReset(writer: WritableStreamDefaultWriter) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitialize(writer);\n}\n\nfunction defaultWriterReadyPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n}\n","/// \n\nfunction getGlobals(): typeof globalThis | undefined {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n } else if (typeof self !== 'undefined') {\n return self;\n } else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n}\n\nexport const globals = getGlobals();\n","/// \nimport { globals } from '../globals';\nimport { setFunctionName } from '../lib/helpers/miscellaneous';\n\ninterface DOMException extends Error {\n name: string;\n message: string;\n}\n\ntype DOMExceptionConstructor = new (message?: string, name?: string) => DOMException;\n\nfunction isDOMExceptionConstructor(ctor: unknown): ctor is DOMExceptionConstructor {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if ((ctor as DOMExceptionConstructor).name !== 'DOMException') {\n return false;\n }\n try {\n new (ctor as DOMExceptionConstructor)();\n return true;\n } catch {\n return false;\n }\n}\n\n/**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\nfunction getFromGlobal(): DOMExceptionConstructor | undefined {\n const ctor = globals?.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n}\n\n/**\n * Support:\n * - All platforms\n */\nfunction createPolyfill(): DOMExceptionConstructor {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(this: DOMException, message?: string, name?: string) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n } as any;\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-redeclare\nconst DOMException: DOMExceptionConstructor = getFromGlobal() || createPolyfill();\n\nexport { DOMException };\n","import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';\nimport { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireWritableStreamDefaultWriter,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamCloseQueuedOrInFlight,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite\n} from '../writable-stream';\nimport assert from '../../stub/assert';\nimport {\n newPromise,\n PerformPromiseThen,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponFulfillment,\n uponPromise,\n uponRejection\n} from '../helpers/webidl';\nimport { noop } from '../../utils';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\nimport { DOMException } from '../../stub/dom-exception';\n\nexport function ReadableStreamPipeTo(source: ReadableStream,\n dest: WritableStream,\n preventClose: boolean,\n preventAbort: boolean,\n preventCancel: boolean,\n signal: AbortSignal | undefined): Promise {\n assert(IsReadableStream(source));\n assert(IsWritableStream(dest));\n assert(typeof preventClose === 'boolean');\n assert(typeof preventAbort === 'boolean');\n assert(typeof preventCancel === 'boolean');\n assert(signal === undefined || isAbortSignal(signal));\n assert(!IsReadableStreamLocked(source));\n assert(!IsWritableStreamLocked(dest));\n\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n\n source._disturbed = true;\n\n let shuttingDown = false;\n\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n\n return newPromise((resolve, reject) => {\n let abortAlgorithm: () => void;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions: Array<() => Promise> = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n\n signal.addEventListener('abort', abortAlgorithm);\n }\n\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done: boolean) {\n if (done) {\n resolveLoop();\n } else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n\n next(false);\n });\n }\n\n function pipeStep(): Promise {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(\n reader,\n {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n }\n );\n });\n });\n }\n\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n } else {\n shutdown();\n }\n return null;\n });\n\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n } else {\n shutdown(true, destClosed);\n }\n }\n\n setPromiseIsHandledToTrue(pipeLoop());\n\n function waitForWritesToFinish(): Promise {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(\n currentWrite,\n () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined\n );\n }\n\n function isOrBecomesErrored(stream: ReadableStream | WritableStream,\n promise: Promise,\n action: (reason: any) => null) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n } else {\n uponRejection(promise, action);\n }\n }\n\n function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise, action: () => null) {\n if (stream._state === 'closed') {\n action();\n } else {\n uponFulfillment(promise, action);\n }\n }\n\n function shutdownWithAction(action: () => Promise, originalIsError?: boolean, originalError?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n } else {\n doTheRest();\n }\n\n function doTheRest(): null {\n uponPromise(\n action(),\n () => finalize(originalIsError, originalError),\n newError => finalize(true, newError)\n );\n return null;\n }\n }\n\n function shutdown(isError?: boolean, error?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n } else {\n finalize(isError, error);\n }\n }\n\n function finalize(isError?: boolean, error?: any): null {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n } else {\n resolve(undefined);\n }\n\n return null;\n }\n });\n}\n","import type { QueuingStrategySizeCallback } from '../queuing-strategy';\nimport assert from '../../stub/assert';\nimport { DequeueValue, EnqueueValueWithSize, type QueuePair, ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n type ReadRequest\n} from './default-reader';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsReadableStreamLocked, ReadableStream, ReadableStreamClose, ReadableStreamError } from '../readable-stream';\nimport type { ValidatedUnderlyingSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\n\n/**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableStreamDefaultController {\n /** @internal */\n _controlledReadableStream!: ReadableStream;\n /** @internal */\n _queue!: SimpleQueue>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('close');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n\n ReadableStreamDefaultControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the controlled readable stream.\n */\n enqueue(chunk: R): void;\n enqueue(chunk: R = undefined!): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n ReadableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest): void {\n const stream = this._controlledReadableStream;\n\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n } else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n\n readRequest._chunkSteps(chunk);\n } else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n // Do nothing.\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\nsetFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableStreamDefaultController.\n\nfunction IsReadableStreamDefaultController(x: any): x is ReadableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultController;\n}\n\nfunction ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController): void {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController): boolean {\n const stream = controller._controlledReadableStream;\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\n// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n\nexport function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n controller._closeRequested = true;\n\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n}\n\nexport function ReadableStreamDefaultControllerEnqueue(\n controller: ReadableStreamDefaultController,\n chunk: R\n): void {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n } else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController, e: any) {\n const stream = controller._controlledReadableStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ResetQueue(controller);\n\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableStreamDefaultControllerGetDesiredSize(\n controller: ReadableStreamDefaultController\n): number | null {\n const state = controller._controlledReadableStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\n// This is used in the implementation of TransformStream.\nexport function ReadableStreamDefaultControllerHasBackpressure(\n controller: ReadableStreamDefaultController\n): boolean {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n\n return true;\n}\n\nexport function ReadableStreamDefaultControllerCanCloseOrEnqueue(\n controller: ReadableStreamDefaultController\n): boolean {\n const state = controller._controlledReadableStream._state;\n\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n\n return false;\n}\n\nexport function SetUpReadableStreamDefaultController(stream: ReadableStream,\n controller: ReadableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(stream._readableStreamController === undefined);\n\n controller._controlledReadableStream = stream;\n\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n stream: ReadableStream,\n underlyingSource: ValidatedUnderlyingSource,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback\n) {\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// Helper functions for the ReadableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n}\n","import {\n CreateReadableByteStream,\n CreateReadableStream,\n type DefaultReadableStream,\n IsReadableStream,\n type ReadableByteStream,\n ReadableStream,\n ReadableStreamCancel,\n type ReadableStreamReader\n} from '../readable-stream';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadRequest\n} from './default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReaderRead,\n type ReadIntoRequest\n} from './byob-reader';\nimport assert from '../../stub/assert';\nimport { newPromise, promiseResolvedWith, queueMicrotask, uponRejection } from '../helpers/webidl';\nimport {\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError\n} from './default-controller';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamControllerClose,\n ReadableByteStreamControllerEnqueue,\n ReadableByteStreamControllerError,\n ReadableByteStreamControllerGetBYOBRequest,\n ReadableByteStreamControllerRespond,\n ReadableByteStreamControllerRespondWithNewView\n} from './byte-stream-controller';\nimport { CreateArrayFromList } from '../abstract-ops/ecmascript';\nimport { CloneAsUint8Array } from '../abstract-ops/miscellaneous';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function ReadableStreamTee(stream: ReadableStream,\n cloneForBranch2: boolean): [ReadableStream, ReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream as unknown as ReadableByteStream) as\n unknown as [ReadableStream, ReadableStream];\n }\n return ReadableStreamDefaultTee(stream, cloneForBranch2);\n}\n\nexport function ReadableStreamDefaultTee(\n stream: ReadableStream,\n cloneForBranch2: boolean\n): [DefaultReadableStream, DefaultReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n\n const reader = AcquireReadableStreamDefaultReader(stream);\n\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: DefaultReadableStream;\n let branch2: DefaultReadableStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function pullAlgorithm(): Promise {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm() {\n // do nothing\n }\n\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n\n uponRejection(reader._closedPromise, (r: any) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n\n return [branch1, branch2];\n}\n\nexport function ReadableByteStreamTee(stream: ReadableByteStream): [ReadableByteStream, ReadableByteStream] {\n assert(IsReadableStream(stream));\n assert(IsReadableByteStreamController(stream._readableStreamController));\n\n let reader: ReadableStreamReader> = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: ReadableByteStream;\n let branch2: ReadableByteStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function forwardReaderError(thisReader: ReadableStreamReader>) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n assert(reader._readIntoRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n\n const readRequest: ReadRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n\n function pullWithBYOBReader(view: NonShared, forBranch2: boolean) {\n if (IsReadableStreamDefaultReader>(reader)) {\n assert(reader._readRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n\n const readIntoRequest: ReadIntoRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n } else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n\n if (chunk !== undefined) {\n assert(chunk.byteLength === 0);\n\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n\n function pull1Algorithm(): Promise {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, false);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function pull2Algorithm(): Promise {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, true);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm(): void {\n return;\n }\n\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n\n forwardReaderError(reader);\n\n return [branch1, branch2];\n}\n","import { typeIsObject } from '../helpers/miscellaneous';\nimport type { ReadableStreamDefaultReadResult } from './default-reader';\n\n/**\n * A common interface for a `ReadadableStream` implementation.\n *\n * @public\n */\nexport interface ReadableStreamLike {\n readonly locked: boolean;\n\n getReader(): ReadableStreamDefaultReaderLike;\n}\n\n/**\n * A common interface for a `ReadableStreamDefaultReader` implementation.\n *\n * @public\n */\nexport interface ReadableStreamDefaultReaderLike {\n readonly closed: Promise;\n\n cancel(reason?: any): Promise;\n\n read(): Promise>;\n\n releaseLock(): void;\n}\n\nexport function isReadableStreamLike(stream: unknown): stream is ReadableStreamLike {\n return typeIsObject(stream) && typeof (stream as ReadableStreamLike).getReader !== 'undefined';\n}\n","import { CreateReadableStream, type DefaultReadableStream } from '../readable-stream';\nimport {\n isReadableStreamLike,\n type ReadableStreamDefaultReaderLike,\n type ReadableStreamLike\n} from './readable-stream-like';\nimport { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue } from './default-controller';\nimport { GetIterator, GetMethod, IteratorComplete, IteratorNext, IteratorValue } from '../abstract-ops/ecmascript';\nimport { promiseRejectedWith, promiseResolvedWith, reflectCall, transformPromiseWith } from '../helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport { noop } from '../../utils';\n\nexport function ReadableStreamFrom(\n source: Iterable | AsyncIterable | ReadableStreamLike\n): DefaultReadableStream {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n}\n\nexport function ReadableStreamFromIterable(asyncIterable: Iterable | AsyncIterable): DefaultReadableStream {\n let stream: DefaultReadableStream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n const iterator = iteratorRecord.iterator;\n let returnMethod: (typeof iterator)['return'] | undefined;\n try {\n returnMethod = GetMethod(iterator, 'return');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult: IteratorResult | Promise>;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n\nexport function ReadableStreamFromDefaultReader(\n reader: ReadableStreamDefaultReaderLike\n): DefaultReadableStream {\n let stream: DefaultReadableStream;\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let readPromise;\n try {\n readPromise = reader.read();\n } catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n } catch (e) {\n return promiseRejectedWith(e);\n }\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n","import { assertDictionary, assertFunction, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamController,\n UnderlyingByteSource,\n UnderlyingDefaultOrByteSource,\n UnderlyingDefaultOrByteSourcePullCallback,\n UnderlyingDefaultOrByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n ValidatedUnderlyingDefaultOrByteSource\n} from '../readable-stream/underlying-source';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\n\nexport function convertUnderlyingDefaultOrByteSource(\n source: UnderlyingSource | UnderlyingByteSource | null,\n context: string\n): ValidatedUnderlyingDefaultOrByteSource {\n assertDictionary(source, context);\n const original = source as (UnderlyingDefaultOrByteSource | null);\n const autoAllocateChunkSize = original?.autoAllocateChunkSize;\n const cancel = original?.cancel;\n const pull = original?.pull;\n const start = original?.start;\n const type = original?.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(\n autoAllocateChunkSize,\n `${context} has member 'autoAllocateChunkSize' that`\n ),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original!, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original!, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n}\n\nfunction convertUnderlyingSourceCancelCallback(\n fn: UnderlyingSourceCancelCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSourcePullCallback(\n fn: UnderlyingDefaultOrByteSourcePullCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (controller: ReadableStreamController) => Promise {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSourceStartCallback(\n fn: UnderlyingDefaultOrByteSourceStartCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): UnderlyingDefaultOrByteSourceStartCallback {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertReadableStreamType(type: string, context: string): 'bytes' {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n}\n","import { assertDictionary } from './basic';\nimport type {\n ReadableStreamIteratorOptions,\n ValidatedReadableStreamIteratorOptions\n} from '../readable-stream/iterator-options';\n\nexport function convertIteratorOptions(options: ReadableStreamIteratorOptions | null | undefined,\n context: string): ValidatedReadableStreamIteratorOptions {\n assertDictionary(options, context);\n const preventCancel = options?.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n}\n","import { assertDictionary } from './basic';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from '../readable-stream/pipe-options';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\n\nexport function convertPipeOptions(options: StreamPipeOptions | null | undefined,\n context: string): ValidatedStreamPipeOptions {\n assertDictionary(options, context);\n const preventAbort = options?.preventAbort;\n const preventCancel = options?.preventCancel;\n const preventClose = options?.preventClose;\n const signal = options?.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n}\n\nfunction assertAbortSignal(signal: unknown, context: string): asserts signal is AbortSignal {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n}\n","import { assertDictionary, assertRequiredField } from './basic';\nimport { ReadableStream } from '../readable-stream';\nimport { WritableStream } from '../writable-stream';\nimport { assertReadableStream } from './readable-stream';\nimport { assertWritableStream } from './writable-stream';\n\nexport function convertReadableWritablePair(\n pair: { readable: RS; writable: WS } | null | undefined,\n context: string\n): { readable: RS; writable: WS } {\n assertDictionary(pair, context);\n\n const readable = pair?.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n\n const writable = pair?.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n\n return { readable, writable };\n}\n","import assert from '../stub/assert';\nimport {\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith\n} from './helpers/webidl';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { AcquireReadableStreamAsyncIterator, type ReadableStreamAsyncIterator } from './readable-stream/async-iterator';\nimport { defaultReaderClosedPromiseReject, defaultReaderClosedPromiseResolve } from './readable-stream/generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderErrorReadRequests,\n type ReadableStreamDefaultReadResult\n} from './readable-stream/default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBReaderErrorReadIntoRequests,\n type ReadableStreamBYOBReadResult\n} from './readable-stream/byob-reader';\nimport { ReadableStreamPipeTo } from './readable-stream/pipe';\nimport { ReadableStreamTee } from './readable-stream/tee';\nimport { ReadableStreamFrom } from './readable-stream/from';\nimport { IsWritableStream, IsWritableStreamLocked, WritableStream } from './writable-stream';\nimport { SimpleQueue } from './simple-queue';\nimport {\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n SetUpReadableByteStreamController,\n SetUpReadableByteStreamControllerFromUnderlyingSource\n} from './readable-stream/byte-stream-controller';\nimport {\n ReadableStreamDefaultController,\n SetUpReadableStreamDefaultController,\n SetUpReadableStreamDefaultControllerFromUnderlyingSource\n} from './readable-stream/default-controller';\nimport type {\n UnderlyingByteSource,\n UnderlyingByteSourcePullCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceStartCallback\n} from './readable-stream/underlying-source';\nimport { noop } from '../utils';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { CreateArrayFromList, SymbolAsyncIterator } from './abstract-ops/ecmascript';\nimport { CancelSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertUnderlyingDefaultOrByteSource } from './validators/underlying-source';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions\n} from './readable-stream/reader-options';\nimport { convertReaderOptions } from './validators/reader-options';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from './readable-stream/pipe-options';\nimport type { ReadableStreamIteratorOptions } from './readable-stream/iterator-options';\nimport { convertIteratorOptions } from './validators/iterator-options';\nimport { convertPipeOptions } from './validators/pipe-options';\nimport type { ReadableWritablePair } from './readable-stream/readable-writable-pair';\nimport { convertReadableWritablePair } from './validators/readable-writable-pair';\nimport type { ReadableStreamDefaultReaderLike, ReadableStreamLike } from './readable-stream/readable-stream-like';\nimport type { NonShared } from './helpers/array-buffer-view';\n\nexport type DefaultReadableStream = ReadableStream & {\n _readableStreamController: ReadableStreamDefaultController\n};\n\nexport type ReadableByteStream = ReadableStream> & {\n _readableStreamController: ReadableByteStreamController\n};\n\ntype ReadableStreamState = 'readable' | 'closed' | 'errored';\n\n/**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\nexport class ReadableStream implements AsyncIterable {\n /** @internal */\n _state!: ReadableStreamState;\n /** @internal */\n _reader: ReadableStreamReader | undefined;\n /** @internal */\n _storedError: any;\n /** @internal */\n _disturbed!: boolean;\n /** @internal */\n _readableStreamController!: ReadableStreamDefaultController | ReadableByteStreamController;\n\n constructor(underlyingSource: UnderlyingByteSource, strategy?: { highWaterMark?: number; size?: undefined });\n constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSource: UnderlyingSource | UnderlyingByteSource | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n } else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n\n InitializeReadableStream(this);\n\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(\n this as unknown as ReadableByteStream,\n underlyingSource,\n highWaterMark\n );\n } else {\n assert(underlyingSource.type === undefined);\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n this,\n underlyingSource,\n highWaterMark,\n sizeAlgorithm\n );\n }\n }\n\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked(): boolean {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsReadableStreamLocked(this);\n }\n\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('cancel'));\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n\n return ReadableStreamCancel(this, reason);\n }\n\n /**\n * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader.\n *\n * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams,\n * i.e. streams which were constructed specifically with the ability to handle \"bring your own buffer\" reading.\n * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its\n * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise\n * control over allocation.\n */\n getReader({ mode }: { mode: 'byob' }): ReadableStreamBYOBReader;\n /**\n * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader.\n * While the stream is locked, no other reader can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to consume a stream\n * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours\n * or cancel the stream, which would interfere with your abstraction.\n */\n getReader(): ReadableStreamDefaultReader;\n getReader(\n rawOptions: ReadableStreamGetReaderOptions | null | undefined = undefined\n ): ReadableStreamDefaultReader | ReadableStreamBYOBReader {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('getReader');\n }\n\n const options = convertReaderOptions(rawOptions, 'First parameter');\n\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n\n assert(options.mode === 'byob');\n return AcquireReadableStreamBYOBReader(this as unknown as ReadableByteStream);\n }\n\n /**\n * Provides a convenient, chainable way of piping this readable stream through a transform stream\n * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream\n * into the writable side of the supplied pair, and returns the readable side for further use.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeThrough(\n transform: { readable: RS; writable: WritableStream },\n options?: StreamPipeOptions\n ): RS;\n pipeThrough(\n rawTransform: { readable: RS; writable: WritableStream } | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}\n ): RS {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n\n const promise = ReadableStreamPipeTo(\n this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n\n setPromiseIsHandledToTrue(promise);\n\n return transform.readable;\n }\n\n /**\n * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under\n * various error conditions can be customized with a number of passed options. It returns a promise that fulfills\n * when the piping process completes successfully, or rejects if any errors were encountered.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise;\n pipeTo(destination: WritableStream | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('pipeTo'));\n }\n\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(\n new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)\n );\n }\n\n let options: ValidatedStreamPipeOptions;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')\n );\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')\n );\n }\n\n return ReadableStreamPipeTo(\n this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n }\n\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee(): [ReadableStream, ReadableStream] {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('tee');\n }\n\n const branches = ReadableStreamTee(this, false);\n return CreateArrayFromList(branches);\n }\n\n /**\n * Asynchronously iterates over the chunks in the stream's internal queue.\n *\n * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader.\n * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method\n * is called, e.g. by breaking out of the loop.\n *\n * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also\n * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing\n * `true` for the `preventCancel` option.\n */\n values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n values(rawOptions: ReadableStreamIteratorOptions | null | undefined = undefined): ReadableStreamAsyncIterator {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('values');\n }\n\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n\n /**\n * {@inheritDoc ReadableStream.values}\n */\n [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n\n [SymbolAsyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator {\n // Stub implementation, overridden below\n return this.values(options);\n }\n\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream {\n return ReadableStreamFrom(asyncIterable);\n }\n}\n\nObject.defineProperties(ReadableStream, {\n from: { enumerable: true }\n});\nObject.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(ReadableStream.from, 'from');\nsetFunctionName(ReadableStream.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStream.prototype.getReader, 'getReader');\nsetFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\nsetFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\nsetFunctionName(ReadableStream.prototype.tee, 'tee');\nsetFunctionName(ReadableStream.prototype.values, 'values');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n}\nObject.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n});\n\nexport type {\n ReadableStreamAsyncIterator,\n ReadableStreamDefaultReadResult,\n ReadableStreamBYOBReadResult,\n ReadableStreamBYOBReaderReadOptions,\n UnderlyingByteSource,\n UnderlyingSource,\n UnderlyingSourceStartCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceCancelCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingByteSourcePullCallback,\n StreamPipeOptions,\n ReadableWritablePair,\n ReadableStreamIteratorOptions,\n ReadableStreamLike,\n ReadableStreamDefaultReaderLike\n};\n\n// Abstract operations for the ReadableStream.\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1\n): DefaultReadableStream {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: DefaultReadableStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n\n return stream;\n}\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableByteStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise\n): ReadableByteStream {\n const stream: ReadableByteStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n\n return stream;\n}\n\nfunction InitializeReadableStream(stream: ReadableStream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n}\n\nexport function IsReadableStream(x: unknown): x is ReadableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStream;\n}\n\nexport function IsReadableStreamDisturbed(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n return stream._disturbed;\n}\n\nexport function IsReadableStreamLocked(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n if (stream._reader === undefined) {\n return false;\n }\n\n return true;\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamCancel(stream: ReadableStream, reason: any): Promise {\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n ReadableStreamClose(stream);\n\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n}\n\nexport function ReadableStreamClose(stream: ReadableStream): void {\n assert(stream._state === 'readable');\n\n stream._state = 'closed';\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseResolve(reader);\n\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n}\n\nexport function ReadableStreamError(stream: ReadableStream, e: any): void {\n assert(IsReadableStream(stream));\n assert(stream._state === 'readable');\n\n stream._state = 'errored';\n stream._storedError = e;\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseReject(reader, e);\n\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n } else {\n assert(IsReadableStreamBYOBReader(reader));\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n}\n\n// Readers\n\nexport type ReadableStreamReader = ReadableStreamDefaultReader | ReadableStreamBYOBReader;\n\nexport {\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader\n};\n\n// Controllers\n\nexport {\n ReadableStreamDefaultController,\n ReadableStreamBYOBRequest,\n ReadableByteStreamController\n};\n\n// Helper functions for the ReadableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n}\n","import type { QueuingStrategyInit } from '../queuing-strategy';\nimport { assertDictionary, assertRequiredField, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategyInit(init: QueuingStrategyInit | null | undefined,\n context: string): QueuingStrategyInit {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst byteLengthSizeFunction = (chunk: ArrayBufferView): number => {\n return chunk.byteLength;\n};\nsetFunctionName(byteLengthSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\nexport default class ByteLengthQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _byteLengthQueuingStrategyHighWaterMark: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size(): (chunk: ArrayBufferView) => number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n}\n\nObject.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the ByteLengthQueuingStrategy.\n\nfunction byteLengthBrandCheckException(name: string): TypeError {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n}\n\nexport function IsByteLengthQueuingStrategy(x: any): x is ByteLengthQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof ByteLengthQueuingStrategy;\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst countSizeFunction = (): 1 => {\n return 1;\n};\nsetFunctionName(countSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\nexport default class CountQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _countQueuingStrategyHighWaterMark!: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size(): (chunk: any) => 1 {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n}\n\nObject.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the CountQueuingStrategy.\n\nfunction countBrandCheckException(name: string): TypeError {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n}\n\nexport function IsCountQueuingStrategy(x: any): x is CountQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof CountQueuingStrategy;\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from '../transform-stream/transformer';\nimport { TransformStreamDefaultController } from '../transform-stream';\n\nexport function convertTransformer(original: Transformer | null,\n context: string): ValidatedTransformer {\n assertDictionary(original, context);\n const cancel = original?.cancel;\n const flush = original?.flush;\n const readableType = original?.readableType;\n const start = original?.start;\n const transform = original?.transform;\n const writableType = original?.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original!, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original!, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original!, `${context} has member 'transform' that`),\n writableType\n };\n}\n\nfunction convertTransformerFlushCallback(\n fn: TransformerFlushCallback,\n original: Transformer,\n context: string\n): (controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertTransformerStartCallback(\n fn: TransformerStartCallback,\n original: Transformer,\n context: string\n): TransformerStartCallback {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertTransformerTransformCallback(\n fn: TransformerTransformCallback,\n original: Transformer,\n context: string\n): (chunk: I, controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: I, controller: TransformStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n\nfunction convertTransformerCancelCallback(\n fn: TransformerCancelCallback,\n original: Transformer,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith,\n uponPromise\n} from './helpers/webidl';\nimport { CreateReadableStream, type DefaultReadableStream, ReadableStream } from './readable-stream';\nimport {\n ReadableStreamDefaultControllerCanCloseOrEnqueue,\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError,\n ReadableStreamDefaultControllerGetDesiredSize,\n ReadableStreamDefaultControllerHasBackpressure\n} from './readable-stream/default-controller';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { CreateWritableStream, WritableStream, WritableStreamDefaultControllerErrorIfNeeded } from './writable-stream';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from './transform-stream/transformer';\nimport { convertTransformer } from './validators/transformer';\n\n// Class TransformStream\n\n/**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\nexport class TransformStream {\n /** @internal */\n _writable!: WritableStream;\n /** @internal */\n _readable!: DefaultReadableStream;\n /** @internal */\n _backpressure!: boolean;\n /** @internal */\n _backpressureChangePromise!: Promise;\n /** @internal */\n _backpressureChangePromise_resolve!: () => void;\n /** @internal */\n _transformStreamController!: TransformStreamDefaultController;\n\n constructor(\n transformer?: Transformer,\n writableStrategy?: QueuingStrategy,\n readableStrategy?: QueuingStrategy\n );\n constructor(rawTransformer: Transformer | null | undefined = {},\n rawWritableStrategy: QueuingStrategy | null | undefined = {},\n rawReadableStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(\n this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm\n );\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n } else {\n startPromise_resolve(undefined);\n }\n }\n\n /**\n * The readable side of the transform stream.\n */\n get readable(): ReadableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n\n return this._readable;\n }\n\n /**\n * The writable side of the transform stream.\n */\n get writable(): WritableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n\n return this._writable;\n }\n}\n\nObject.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n}\n\nexport type {\n Transformer,\n TransformerCancelCallback,\n TransformerStartCallback,\n TransformerFlushCallback,\n TransformerTransformCallback\n};\n\n// Transform Stream Abstract Operations\n\nexport function CreateTransformStream(startAlgorithm: () => void | PromiseLike,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n writableHighWaterMark = 1,\n writableSizeAlgorithm: QueuingStrategySizeCallback = () => 1,\n readableHighWaterMark = 0,\n readableSizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(writableHighWaterMark));\n assert(IsNonNegativeNumber(readableHighWaterMark));\n\n const stream: TransformStream = Object.create(TransformStream.prototype);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n\n const startResult = startAlgorithm();\n startPromise_resolve(startResult);\n return stream;\n}\n\nfunction InitializeTransformStream(stream: TransformStream,\n startPromise: Promise,\n writableHighWaterMark: number,\n writableSizeAlgorithm: QueuingStrategySizeCallback,\n readableHighWaterMark: number,\n readableSizeAlgorithm: QueuingStrategySizeCallback) {\n function startAlgorithm(): Promise {\n return startPromise;\n }\n\n function writeAlgorithm(chunk: I): Promise {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n\n function abortAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n\n function closeAlgorithm(): Promise {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm,\n writableHighWaterMark, writableSizeAlgorithm);\n\n function pullAlgorithm(): Promise {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n\n function cancelAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined!;\n stream._backpressureChangePromise = undefined!;\n stream._backpressureChangePromise_resolve = undefined!;\n TransformStreamSetBackpressure(stream, true);\n\n stream._transformStreamController = undefined!;\n}\n\nfunction IsTransformStream(x: unknown): x is TransformStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n\n return x instanceof TransformStream;\n}\n\n// This is a no-op if both sides are already errored.\nfunction TransformStreamError(stream: TransformStream, e: any) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n}\n\nfunction TransformStreamErrorWritableAndUnblockWrite(stream: TransformStream, e: any) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n}\n\nfunction TransformStreamUnblockWrite(stream: TransformStream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. 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This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate(): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n\n TransformStreamDefaultControllerTerminate(this);\n }\n}\n\nObject.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(TransformStreamDefaultController.prototype.error, 'error');\nsetFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n}\n\n// Transform Stream Default Controller Abstract Operations\n\nfunction IsTransformStreamDefaultController(x: any): x is TransformStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n\n return x instanceof TransformStreamDefaultController;\n}\n\nfunction SetUpTransformStreamDefaultController(stream: TransformStream,\n controller: TransformStreamDefaultController,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise) {\n assert(IsTransformStream(stream));\n assert(stream._transformStreamController === undefined);\n\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nfunction SetUpTransformStreamDefaultControllerFromTransformer(stream: TransformStream,\n transformer: ValidatedTransformer) {\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n let transformAlgorithm: (chunk: I) => Promise;\n let flushAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform!(chunk, controller);\n } else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk as unknown as O);\n return promiseResolvedWith(undefined);\n } catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush!(controller);\n } else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n}\n\nfunction TransformStreamDefaultControllerClearAlgorithms(controller: TransformStreamDefaultController) {\n controller._transformAlgorithm = undefined!;\n controller._flushAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\nfunction TransformStreamDefaultControllerEnqueue(controller: TransformStreamDefaultController, chunk: O) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n\n // We throttle 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transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n}\n\nfunction TransformStreamDefaultControllerTerminate(controller: TransformStreamDefaultController) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n\n ReadableStreamDefaultControllerClose(readableController);\n\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n}\n\n// TransformStreamDefaultSink Algorithms\n\nfunction TransformStreamDefaultSinkWriteAlgorithm(stream: TransformStream, chunk: I): Promise {\n assert(stream._writable._state === 'writable');\n\n const controller = stream._transformStreamController;\n\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n assert(backpressureChangePromise !== undefined);\n return 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stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n 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\ No newline at end of file diff --git a/node_modules/web-streams-polyfill/dist/ponyfill.es2018.mjs b/node_modules/web-streams-polyfill/dist/ponyfill.es2018.mjs new file mode 100644 index 00000000..431260f8 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/ponyfill.es2018.mjs @@ -0,0 +1,4717 @@ +/** + * @license + * web-streams-polyfill v3.3.3 + * Copyright 2024 Mattias Buelens, Diwank Singh Tomer and other contributors. + * This code is released under the MIT license. + * SPDX-License-Identifier: MIT + */ +function noop() { + return undefined; +} + +function typeIsObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; +} +const rethrowAssertionErrorRejection = noop; +function setFunctionName(fn, name) { + try { + Object.defineProperty(fn, 'name', { + value: name, + configurable: true + }); + } + catch (_a) { + // This property is non-configurable in older browsers, so ignore if this throws. + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility + } +} + +const originalPromise = Promise; +const originalPromiseThen = Promise.prototype.then; +const originalPromiseReject = Promise.reject.bind(originalPromise); +// https://webidl.spec.whatwg.org/#a-new-promise +function newPromise(executor) { + return new originalPromise(executor); +} +// https://webidl.spec.whatwg.org/#a-promise-resolved-with +function promiseResolvedWith(value) { + return newPromise(resolve => resolve(value)); +} +// https://webidl.spec.whatwg.org/#a-promise-rejected-with +function promiseRejectedWith(reason) { + return originalPromiseReject(reason); +} +function PerformPromiseThen(promise, onFulfilled, onRejected) { + // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an + // approximation. + return originalPromiseThen.call(promise, onFulfilled, onRejected); +} +// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned +// from that handler. To prevent this, return null instead of void from all handlers. +// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it +function uponPromise(promise, onFulfilled, onRejected) { + PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection); +} +function uponFulfillment(promise, onFulfilled) { + uponPromise(promise, onFulfilled); +} +function uponRejection(promise, onRejected) { + uponPromise(promise, undefined, onRejected); +} +function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) { + return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler); +} +function setPromiseIsHandledToTrue(promise) { + PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection); +} +let _queueMicrotask = callback => { + if (typeof queueMicrotask === 'function') { + _queueMicrotask = queueMicrotask; + } + else { + const resolvedPromise = promiseResolvedWith(undefined); + _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb); + } + return _queueMicrotask(callback); +}; +function reflectCall(F, V, args) { + if (typeof F !== 'function') { + throw new TypeError('Argument is not a function'); + } + return Function.prototype.apply.call(F, V, args); +} +function promiseCall(F, V, args) { + try { + return promiseResolvedWith(reflectCall(F, V, args)); + } + catch (value) { + return promiseRejectedWith(value); + } +} + +// Original from Chromium +// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js +const QUEUE_MAX_ARRAY_SIZE = 16384; +/** + * Simple queue structure. + * + * Avoids scalability issues with using a packed array directly by using + * multiple arrays in a linked list and keeping the array size bounded. + */ +class SimpleQueue { + constructor() { + this._cursor = 0; + this._size = 0; + // _front and _back are always defined. + this._front = { + _elements: [], + _next: undefined + }; + this._back = this._front; + // The cursor is used to avoid calling Array.shift(). + // It contains the index of the front element of the array inside the + // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE). + this._cursor = 0; + // When there is only one node, size === elements.length - cursor. + this._size = 0; + } + get length() { + return this._size; + } + // For exception safety, this method is structured in order: + // 1. Read state + // 2. Calculate required state mutations + // 3. Perform state mutations + push(element) { + const oldBack = this._back; + let newBack = oldBack; + if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) { + newBack = { + _elements: [], + _next: undefined + }; + } + // push() is the mutation most likely to throw an exception, so it + // goes first. + oldBack._elements.push(element); + if (newBack !== oldBack) { + this._back = newBack; + oldBack._next = newBack; + } + ++this._size; + } + // Like push(), shift() follows the read -> calculate -> mutate pattern for + // exception safety. + shift() { // must not be called on an empty queue + const oldFront = this._front; + let newFront = oldFront; + const oldCursor = this._cursor; + let newCursor = oldCursor + 1; + const elements = oldFront._elements; + const element = elements[oldCursor]; + if (newCursor === QUEUE_MAX_ARRAY_SIZE) { + newFront = oldFront._next; + newCursor = 0; + } + // No mutations before this point. + --this._size; + this._cursor = newCursor; + if (oldFront !== newFront) { + this._front = newFront; + } + // Permit shifted element to be garbage collected. + elements[oldCursor] = undefined; + return element; + } + // The tricky thing about forEach() is that it can be called + // re-entrantly. The queue may be mutated inside the callback. It is easy to + // see that push() within the callback has no negative effects since the end + // of the queue is checked for on every iteration. If shift() is called + // repeatedly within the callback then the next iteration may return an + // element that has been removed. In this case the callback will be called + // with undefined values until we either "catch up" with elements that still + // exist or reach the back of the queue. + forEach(callback) { + let i = this._cursor; + let node = this._front; + let elements = node._elements; + while (i !== elements.length || node._next !== undefined) { + if (i === elements.length) { + node = node._next; + elements = node._elements; + i = 0; + if (elements.length === 0) { + break; + } + } + callback(elements[i]); + ++i; + } + } + // Return the element that would be returned if shift() was called now, + // without modifying the queue. + peek() { // must not be called on an empty queue + const front = this._front; + const cursor = this._cursor; + return front._elements[cursor]; + } +} + +const AbortSteps = Symbol('[[AbortSteps]]'); +const ErrorSteps = Symbol('[[ErrorSteps]]'); +const CancelSteps = Symbol('[[CancelSteps]]'); +const PullSteps = Symbol('[[PullSteps]]'); +const ReleaseSteps = Symbol('[[ReleaseSteps]]'); + +function ReadableStreamReaderGenericInitialize(reader, stream) { + reader._ownerReadableStream = stream; + stream._reader = reader; + if (stream._state === 'readable') { + defaultReaderClosedPromiseInitialize(reader); + } + else if (stream._state === 'closed') { + defaultReaderClosedPromiseInitializeAsResolved(reader); + } + else { + defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError); + } +} +// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state +// check. +function ReadableStreamReaderGenericCancel(reader, reason) { + const stream = reader._ownerReadableStream; + return ReadableStreamCancel(stream, reason); +} +function ReadableStreamReaderGenericRelease(reader) { + const stream = reader._ownerReadableStream; + if (stream._state === 'readable') { + defaultReaderClosedPromiseReject(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + else { + defaultReaderClosedPromiseResetToRejected(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + stream._readableStreamController[ReleaseSteps](); + stream._reader = undefined; + reader._ownerReadableStream = undefined; +} +// Helper functions for the readers. +function readerLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released reader'); +} +// Helper functions for the ReadableStreamDefaultReader. +function defaultReaderClosedPromiseInitialize(reader) { + reader._closedPromise = newPromise((resolve, reject) => { + reader._closedPromise_resolve = resolve; + reader._closedPromise_reject = reject; + }); +} +function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseReject(reader, reason); +} +function defaultReaderClosedPromiseInitializeAsResolved(reader) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseResolve(reader); +} +function defaultReaderClosedPromiseReject(reader, reason) { + if (reader._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(reader._closedPromise); + reader._closedPromise_reject(reason); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; +} +function defaultReaderClosedPromiseResetToRejected(reader, reason) { + defaultReaderClosedPromiseInitializeAsRejected(reader, reason); +} +function defaultReaderClosedPromiseResolve(reader) { + if (reader._closedPromise_resolve === undefined) { + return; + } + reader._closedPromise_resolve(undefined); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; +} + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill +const NumberIsFinite = Number.isFinite || function (x) { + return typeof x === 'number' && isFinite(x); +}; + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill +const MathTrunc = Math.trunc || function (v) { + return v < 0 ? Math.ceil(v) : Math.floor(v); +}; + +// https://heycam.github.io/webidl/#idl-dictionaries +function isDictionary(x) { + return typeof x === 'object' || typeof x === 'function'; +} +function assertDictionary(obj, context) { + if (obj !== undefined && !isDictionary(obj)) { + throw new TypeError(`${context} is not an object.`); + } +} +// https://heycam.github.io/webidl/#idl-callback-functions +function assertFunction(x, context) { + if (typeof x !== 'function') { + throw new TypeError(`${context} is not a function.`); + } +} +// https://heycam.github.io/webidl/#idl-object +function isObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; +} +function assertObject(x, context) { + if (!isObject(x)) { + throw new TypeError(`${context} is not an object.`); + } +} +function assertRequiredArgument(x, position, context) { + if (x === undefined) { + throw new TypeError(`Parameter ${position} is required in '${context}'.`); + } +} +function assertRequiredField(x, field, context) { + if (x === undefined) { + throw new TypeError(`${field} is required in '${context}'.`); + } +} +// https://heycam.github.io/webidl/#idl-unrestricted-double +function convertUnrestrictedDouble(value) { + return Number(value); +} +function censorNegativeZero(x) { + return x === 0 ? 0 : x; +} +function integerPart(x) { + return censorNegativeZero(MathTrunc(x)); +} +// https://heycam.github.io/webidl/#idl-unsigned-long-long +function convertUnsignedLongLongWithEnforceRange(value, context) { + const lowerBound = 0; + const upperBound = Number.MAX_SAFE_INTEGER; + let x = Number(value); + x = censorNegativeZero(x); + if (!NumberIsFinite(x)) { + throw new TypeError(`${context} is not a finite number`); + } + x = integerPart(x); + if (x < lowerBound || x > upperBound) { + throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`); + } + if (!NumberIsFinite(x) || x === 0) { + return 0; + } + // TODO Use BigInt if supported? + // let xBigInt = BigInt(integerPart(x)); + // xBigInt = BigInt.asUintN(64, xBigInt); + // return Number(xBigInt); + return x; +} + +function assertReadableStream(x, context) { + if (!IsReadableStream(x)) { + throw new TypeError(`${context} is not a ReadableStream.`); + } +} + +// Abstract operations for the ReadableStream. +function AcquireReadableStreamDefaultReader(stream) { + return new ReadableStreamDefaultReader(stream); +} +// ReadableStream API exposed for controllers. +function ReadableStreamAddReadRequest(stream, readRequest) { + stream._reader._readRequests.push(readRequest); +} +function ReadableStreamFulfillReadRequest(stream, chunk, done) { + const reader = stream._reader; + const readRequest = reader._readRequests.shift(); + if (done) { + readRequest._closeSteps(); + } + else { + readRequest._chunkSteps(chunk); + } +} +function ReadableStreamGetNumReadRequests(stream) { + return stream._reader._readRequests.length; +} +function ReadableStreamHasDefaultReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamDefaultReader(reader)) { + return false; + } + return true; +} +/** + * A default reader vended by a {@link ReadableStream}. + * + * @public + */ +class ReadableStreamDefaultReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, + * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + /** + * Returns a promise that allows access to the next chunk from the stream's internal queue, if available. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + read() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('read')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: () => resolvePromise({ value: undefined, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamDefaultReaderRead(this, readRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamDefaultReader(this)) { + throw defaultReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamDefaultReaderRelease(this); + } +} +Object.defineProperties(ReadableStreamDefaultReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } +}); +setFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel'); +setFunctionName(ReadableStreamDefaultReader.prototype.read, 'read'); +setFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultReader', + configurable: true + }); +} +// Abstract operations for the readers. +function IsReadableStreamDefaultReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) { + return false; + } + return x instanceof ReadableStreamDefaultReader; +} +function ReadableStreamDefaultReaderRead(reader, readRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'closed') { + readRequest._closeSteps(); + } + else if (stream._state === 'errored') { + readRequest._errorSteps(stream._storedError); + } + else { + stream._readableStreamController[PullSteps](readRequest); + } +} +function ReadableStreamDefaultReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamDefaultReaderErrorReadRequests(reader, e); +} +function ReadableStreamDefaultReaderErrorReadRequests(reader, e) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._errorSteps(e); + }); +} +// Helper functions for the ReadableStreamDefaultReader. +function defaultReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`); +} + +/// +/* eslint-disable @typescript-eslint/no-empty-function */ +const AsyncIteratorPrototype = Object.getPrototypeOf(Object.getPrototypeOf(async function* () { }).prototype); + +/// +class ReadableStreamAsyncIteratorImpl { + constructor(reader, preventCancel) { + this._ongoingPromise = undefined; + this._isFinished = false; + this._reader = reader; + this._preventCancel = preventCancel; + } + next() { + const nextSteps = () => this._nextSteps(); + this._ongoingPromise = this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) : + nextSteps(); + return this._ongoingPromise; + } + return(value) { + const returnSteps = () => this._returnSteps(value); + return this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) : + returnSteps(); + } + _nextSteps() { + if (this._isFinished) { + return Promise.resolve({ value: undefined, done: true }); + } + const reader = this._reader; + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => { + this._ongoingPromise = undefined; + // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test. + // FIXME Is this a bug in the specification, or in the test? + _queueMicrotask(() => resolvePromise({ value: chunk, done: false })); + }, + _closeSteps: () => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + resolvePromise({ value: undefined, done: true }); + }, + _errorSteps: reason => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + rejectPromise(reason); + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promise; + } + _returnSteps(value) { + if (this._isFinished) { + return Promise.resolve({ value, done: true }); + } + this._isFinished = true; + const reader = this._reader; + if (!this._preventCancel) { + const result = ReadableStreamReaderGenericCancel(reader, value); + ReadableStreamReaderGenericRelease(reader); + return transformPromiseWith(result, () => ({ value, done: true })); + } + ReadableStreamReaderGenericRelease(reader); + return promiseResolvedWith({ value, done: true }); + } +} +const ReadableStreamAsyncIteratorPrototype = { + next() { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next')); + } + return this._asyncIteratorImpl.next(); + }, + return(value) { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return')); + } + return this._asyncIteratorImpl.return(value); + } +}; +Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype); +// Abstract operations for the ReadableStream. +function AcquireReadableStreamAsyncIterator(stream, preventCancel) { + const reader = AcquireReadableStreamDefaultReader(stream); + const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel); + const iterator = Object.create(ReadableStreamAsyncIteratorPrototype); + iterator._asyncIteratorImpl = impl; + return iterator; +} +function IsReadableStreamAsyncIterator(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) { + return false; + } + try { + // noinspection SuspiciousTypeOfGuard + return x._asyncIteratorImpl instanceof + ReadableStreamAsyncIteratorImpl; + } + catch (_a) { + return false; + } +} +// Helper functions for the ReadableStream. +function streamAsyncIteratorBrandCheckException(name) { + return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`); +} + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill +const NumberIsNaN = Number.isNaN || function (x) { + // eslint-disable-next-line no-self-compare + return x !== x; +}; + +var _a, _b, _c; +function CreateArrayFromList(elements) { + // We use arrays to represent lists, so this is basically a no-op. + // Do a slice though just in case we happen to depend on the unique-ness. + return elements.slice(); +} +function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) { + new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset); +} +let TransferArrayBuffer = (O) => { + if (typeof O.transfer === 'function') { + TransferArrayBuffer = buffer => buffer.transfer(); + } + else if (typeof structuredClone === 'function') { + TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] }); + } + else { + // Not implemented correctly + TransferArrayBuffer = buffer => buffer; + } + return TransferArrayBuffer(O); +}; +let IsDetachedBuffer = (O) => { + if (typeof O.detached === 'boolean') { + IsDetachedBuffer = buffer => buffer.detached; + } + else { + // Not implemented correctly + IsDetachedBuffer = buffer => buffer.byteLength === 0; + } + return IsDetachedBuffer(O); +}; +function ArrayBufferSlice(buffer, begin, end) { + // ArrayBuffer.prototype.slice is not available on IE10 + // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice + if (buffer.slice) { + return buffer.slice(begin, end); + } + const length = end - begin; + const slice = new ArrayBuffer(length); + CopyDataBlockBytes(slice, 0, buffer, begin, length); + return slice; +} +function GetMethod(receiver, prop) { + const func = receiver[prop]; + if (func === undefined || func === null) { + return undefined; + } + if (typeof func !== 'function') { + throw new TypeError(`${String(prop)} is not a function`); + } + return func; +} +function CreateAsyncFromSyncIterator(syncIteratorRecord) { + // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%, + // we use yield* inside an async generator function to achieve the same result. + // Wrap the sync iterator inside a sync iterable, so we can use it with yield*. + const syncIterable = { + [Symbol.iterator]: () => syncIteratorRecord.iterator + }; + // Create an async generator function and immediately invoke it. + const asyncIterator = (async function* () { + return yield* syncIterable; + }()); + // Return as an async iterator record. + const nextMethod = asyncIterator.next; + return { iterator: asyncIterator, nextMethod, done: false }; +} +// Aligns with core-js/modules/es.symbol.async-iterator.js +const SymbolAsyncIterator = (_c = (_a = Symbol.asyncIterator) !== null && _a !== void 0 ? _a : (_b = Symbol.for) === null || _b === void 0 ? void 0 : _b.call(Symbol, 'Symbol.asyncIterator')) !== null && _c !== void 0 ? _c : '@@asyncIterator'; +function GetIterator(obj, hint = 'sync', method) { + if (method === undefined) { + if (hint === 'async') { + method = GetMethod(obj, SymbolAsyncIterator); + if (method === undefined) { + const syncMethod = GetMethod(obj, Symbol.iterator); + const syncIteratorRecord = GetIterator(obj, 'sync', syncMethod); + return CreateAsyncFromSyncIterator(syncIteratorRecord); + } + } + else { + method = GetMethod(obj, Symbol.iterator); + } + } + if (method === undefined) { + throw new TypeError('The object is not iterable'); + } + const iterator = reflectCall(method, obj, []); + if (!typeIsObject(iterator)) { + throw new TypeError('The iterator method must return an object'); + } + const nextMethod = iterator.next; + return { iterator, nextMethod, done: false }; +} +function IteratorNext(iteratorRecord) { + const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []); + if (!typeIsObject(result)) { + throw new TypeError('The iterator.next() method must return an object'); + } + return result; +} +function IteratorComplete(iterResult) { + return Boolean(iterResult.done); +} +function IteratorValue(iterResult) { + return iterResult.value; +} + +function IsNonNegativeNumber(v) { + if (typeof v !== 'number') { + return false; + } + if (NumberIsNaN(v)) { + return false; + } + if (v < 0) { + return false; + } + return true; +} +function CloneAsUint8Array(O) { + const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength); + return new Uint8Array(buffer); +} + +function DequeueValue(container) { + const pair = container._queue.shift(); + container._queueTotalSize -= pair.size; + if (container._queueTotalSize < 0) { + container._queueTotalSize = 0; + } + return pair.value; +} +function EnqueueValueWithSize(container, value, size) { + if (!IsNonNegativeNumber(size) || size === Infinity) { + throw new RangeError('Size must be a finite, non-NaN, non-negative number.'); + } + container._queue.push({ value, size }); + container._queueTotalSize += size; +} +function PeekQueueValue(container) { + const pair = container._queue.peek(); + return pair.value; +} +function ResetQueue(container) { + container._queue = new SimpleQueue(); + container._queueTotalSize = 0; +} + +function isDataViewConstructor(ctor) { + return ctor === DataView; +} +function isDataView(view) { + return isDataViewConstructor(view.constructor); +} +function arrayBufferViewElementSize(ctor) { + if (isDataViewConstructor(ctor)) { + return 1; + } + return ctor.BYTES_PER_ELEMENT; +} + +/** + * A pull-into request in a {@link ReadableByteStreamController}. + * + * @public + */ +class ReadableStreamBYOBRequest { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the view for writing in to, or `null` if the BYOB request has already been responded to. + */ + get view() { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('view'); + } + return this._view; + } + respond(bytesWritten) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respond'); + } + assertRequiredArgument(bytesWritten, 1, 'respond'); + bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter'); + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(this._view.buffer)) { + throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`); + } + ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten); + } + respondWithNewView(view) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respondWithNewView'); + } + assertRequiredArgument(view, 1, 'respondWithNewView'); + if (!ArrayBuffer.isView(view)) { + throw new TypeError('You can only respond with array buffer views'); + } + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(view.buffer)) { + throw new TypeError('The given view\'s buffer has been detached and so cannot be used as a response'); + } + ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view); + } +} +Object.defineProperties(ReadableStreamBYOBRequest.prototype, { + respond: { enumerable: true }, + respondWithNewView: { enumerable: true }, + view: { enumerable: true } +}); +setFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond'); +setFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBRequest', + configurable: true + }); +} +/** + * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue. + * + * @public + */ +class ReadableByteStreamController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the current BYOB pull request, or `null` if there isn't one. + */ + get byobRequest() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('byobRequest'); + } + return ReadableByteStreamControllerGetBYOBRequest(this); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('desiredSize'); + } + return ReadableByteStreamControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('close'); + } + if (this._closeRequested) { + throw new TypeError('The stream has already been closed; do not close it again!'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`); + } + ReadableByteStreamControllerClose(this); + } + enqueue(chunk) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('enqueue'); + } + assertRequiredArgument(chunk, 1, 'enqueue'); + if (!ArrayBuffer.isView(chunk)) { + throw new TypeError('chunk must be an array buffer view'); + } + if (chunk.byteLength === 0) { + throw new TypeError('chunk must have non-zero byteLength'); + } + if (chunk.buffer.byteLength === 0) { + throw new TypeError(`chunk's buffer must have non-zero byteLength`); + } + if (this._closeRequested) { + throw new TypeError('stream is closed or draining'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`); + } + ReadableByteStreamControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('error'); + } + ReadableByteStreamControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ReadableByteStreamControllerClearPendingPullIntos(this); + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableByteStreamControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableByteStream; + if (this._queueTotalSize > 0) { + ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest); + return; + } + const autoAllocateChunkSize = this._autoAllocateChunkSize; + if (autoAllocateChunkSize !== undefined) { + let buffer; + try { + buffer = new ArrayBuffer(autoAllocateChunkSize); + } + catch (bufferE) { + readRequest._errorSteps(bufferE); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: autoAllocateChunkSize, + byteOffset: 0, + byteLength: autoAllocateChunkSize, + bytesFilled: 0, + minimumFill: 1, + elementSize: 1, + viewConstructor: Uint8Array, + readerType: 'default' + }; + this._pendingPullIntos.push(pullIntoDescriptor); + } + ReadableStreamAddReadRequest(stream, readRequest); + ReadableByteStreamControllerCallPullIfNeeded(this); + } + /** @internal */ + [ReleaseSteps]() { + if (this._pendingPullIntos.length > 0) { + const firstPullInto = this._pendingPullIntos.peek(); + firstPullInto.readerType = 'none'; + this._pendingPullIntos = new SimpleQueue(); + this._pendingPullIntos.push(firstPullInto); + } + } +} +Object.defineProperties(ReadableByteStreamController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + byobRequest: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(ReadableByteStreamController.prototype.close, 'close'); +setFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue'); +setFunctionName(ReadableByteStreamController.prototype.error, 'error'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, { + value: 'ReadableByteStreamController', + configurable: true + }); +} +// Abstract operations for the ReadableByteStreamController. +function IsReadableByteStreamController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) { + return false; + } + return x instanceof ReadableByteStreamController; +} +function IsReadableStreamBYOBRequest(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) { + return false; + } + return x instanceof ReadableStreamBYOBRequest; +} +function ReadableByteStreamControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableByteStreamControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + // TODO: Test controller argument + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableByteStreamControllerError(controller, e); + return null; + }); +} +function ReadableByteStreamControllerClearPendingPullIntos(controller) { + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + controller._pendingPullIntos = new SimpleQueue(); +} +function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) { + let done = false; + if (stream._state === 'closed') { + done = true; + } + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'default') { + ReadableStreamFulfillReadRequest(stream, filledView, done); + } + else { + ReadableStreamFulfillReadIntoRequest(stream, filledView, done); + } +} +function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) { + const bytesFilled = pullIntoDescriptor.bytesFilled; + const elementSize = pullIntoDescriptor.elementSize; + return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize); +} +function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) { + controller._queue.push({ buffer, byteOffset, byteLength }); + controller._queueTotalSize += byteLength; +} +function ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, buffer, byteOffset, byteLength) { + let clonedChunk; + try { + clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength); + } + catch (cloneE) { + ReadableByteStreamControllerError(controller, cloneE); + throw cloneE; + } + ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength); +} +function ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstDescriptor) { + if (firstDescriptor.bytesFilled > 0) { + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, firstDescriptor.buffer, firstDescriptor.byteOffset, firstDescriptor.bytesFilled); + } + ReadableByteStreamControllerShiftPendingPullInto(controller); +} +function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) { + const maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled); + const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy; + let totalBytesToCopyRemaining = maxBytesToCopy; + let ready = false; + const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize; + const maxAlignedBytes = maxBytesFilled - remainderBytes; + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) { + totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled; + ready = true; + } + const queue = controller._queue; + while (totalBytesToCopyRemaining > 0) { + const headOfQueue = queue.peek(); + const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength); + const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy); + if (headOfQueue.byteLength === bytesToCopy) { + queue.shift(); + } + else { + headOfQueue.byteOffset += bytesToCopy; + headOfQueue.byteLength -= bytesToCopy; + } + controller._queueTotalSize -= bytesToCopy; + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor); + totalBytesToCopyRemaining -= bytesToCopy; + } + return ready; +} +function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) { + pullIntoDescriptor.bytesFilled += size; +} +function ReadableByteStreamControllerHandleQueueDrain(controller) { + if (controller._queueTotalSize === 0 && controller._closeRequested) { + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(controller._controlledReadableByteStream); + } + else { + ReadableByteStreamControllerCallPullIfNeeded(controller); + } +} +function ReadableByteStreamControllerInvalidateBYOBRequest(controller) { + if (controller._byobRequest === null) { + return; + } + controller._byobRequest._associatedReadableByteStreamController = undefined; + controller._byobRequest._view = null; + controller._byobRequest = null; +} +function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) { + while (controller._pendingPullIntos.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const pullIntoDescriptor = controller._pendingPullIntos.peek(); + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + } + } +} +function ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller) { + const reader = controller._controlledReadableByteStream._reader; + while (reader._readRequests.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const readRequest = reader._readRequests.shift(); + ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest); + } +} +function ReadableByteStreamControllerPullInto(controller, view, min, readIntoRequest) { + const stream = controller._controlledReadableByteStream; + const ctor = view.constructor; + const elementSize = arrayBufferViewElementSize(ctor); + const { byteOffset, byteLength } = view; + const minimumFill = min * elementSize; + let buffer; + try { + buffer = TransferArrayBuffer(view.buffer); + } + catch (e) { + readIntoRequest._errorSteps(e); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: buffer.byteLength, + byteOffset, + byteLength, + bytesFilled: 0, + minimumFill, + elementSize, + viewConstructor: ctor, + readerType: 'byob' + }; + if (controller._pendingPullIntos.length > 0) { + controller._pendingPullIntos.push(pullIntoDescriptor); + // No ReadableByteStreamControllerCallPullIfNeeded() call since: + // - No change happens on desiredSize + // - The source has already been notified of that there's at least 1 pending read(view) + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + return; + } + if (stream._state === 'closed') { + const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0); + readIntoRequest._closeSteps(emptyView); + return; + } + if (controller._queueTotalSize > 0) { + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + ReadableByteStreamControllerHandleQueueDrain(controller); + readIntoRequest._chunkSteps(filledView); + return; + } + if (controller._closeRequested) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + readIntoRequest._errorSteps(e); + return; + } + } + controller._pendingPullIntos.push(pullIntoDescriptor); + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) { + if (firstDescriptor.readerType === 'none') { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const stream = controller._controlledReadableByteStream; + if (ReadableStreamHasBYOBReader(stream)) { + while (ReadableStreamGetNumReadIntoRequests(stream) > 0) { + const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor); + } + } +} +function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) { + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + return; + } + if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) { + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + return; + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize; + if (remainderSize > 0) { + const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, pullIntoDescriptor.buffer, end - remainderSize, remainderSize); + } + pullIntoDescriptor.bytesFilled -= remainderSize; + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); +} +function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor); + } + else { + ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerShiftPendingPullInto(controller) { + const descriptor = controller._pendingPullIntos.shift(); + return descriptor; +} +function ReadableByteStreamControllerShouldCallPull(controller) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return false; + } + if (controller._closeRequested) { + return false; + } + if (!controller._started) { + return false; + } + if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; +} +function ReadableByteStreamControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; +} +// A client of ReadableByteStreamController may use these functions directly to bypass state check. +function ReadableByteStreamControllerClose(controller) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + if (controller._queueTotalSize > 0) { + controller._closeRequested = true; + return; + } + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + throw e; + } + } + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(stream); +} +function ReadableByteStreamControllerEnqueue(controller, chunk) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + const { buffer, byteOffset, byteLength } = chunk; + if (IsDetachedBuffer(buffer)) { + throw new TypeError('chunk\'s buffer is detached and so cannot be enqueued'); + } + const transferredBuffer = TransferArrayBuffer(buffer); + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (IsDetachedBuffer(firstPendingPullInto.buffer)) { + throw new TypeError('The BYOB request\'s buffer has been detached and so cannot be filled with an enqueued chunk'); + } + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer); + if (firstPendingPullInto.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto); + } + } + if (ReadableStreamHasDefaultReader(stream)) { + ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller); + if (ReadableStreamGetNumReadRequests(stream) === 0) { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + else { + if (controller._pendingPullIntos.length > 0) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength); + ReadableStreamFulfillReadRequest(stream, transferredView, false); + } + } + else if (ReadableStreamHasBYOBReader(stream)) { + // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully. + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + else { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerError(controller, e) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return; + } + ReadableByteStreamControllerClearPendingPullIntos(controller); + ResetQueue(controller); + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); +} +function ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest) { + const entry = controller._queue.shift(); + controller._queueTotalSize -= entry.byteLength; + ReadableByteStreamControllerHandleQueueDrain(controller); + const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength); + readRequest._chunkSteps(view); +} +function ReadableByteStreamControllerGetBYOBRequest(controller) { + if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled); + const byobRequest = Object.create(ReadableStreamBYOBRequest.prototype); + SetUpReadableStreamBYOBRequest(byobRequest, controller, view); + controller._byobRequest = byobRequest; + } + return controller._byobRequest; +} +function ReadableByteStreamControllerGetDesiredSize(controller) { + const state = controller._controlledReadableByteStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; +} +function ReadableByteStreamControllerRespond(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (bytesWritten !== 0) { + throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream'); + } + } + else { + if (bytesWritten === 0) { + throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream'); + } + if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) { + throw new RangeError('bytesWritten out of range'); + } + } + firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer); + ReadableByteStreamControllerRespondInternal(controller, bytesWritten); +} +function ReadableByteStreamControllerRespondWithNewView(controller, view) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (view.byteLength !== 0) { + throw new TypeError('The view\'s length must be 0 when calling respondWithNewView() on a closed stream'); + } + } + else { + if (view.byteLength === 0) { + throw new TypeError('The view\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'); + } + } + if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) { + throw new RangeError('The region specified by view does not match byobRequest'); + } + if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) { + throw new RangeError('The buffer of view has different capacity than byobRequest'); + } + if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) { + throw new RangeError('The region specified by view is larger than byobRequest'); + } + const viewByteLength = view.byteLength; + firstDescriptor.buffer = TransferArrayBuffer(view.buffer); + ReadableByteStreamControllerRespondInternal(controller, viewByteLength); +} +function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) { + controller._controlledReadableByteStream = stream; + controller._pullAgain = false; + controller._pulling = false; + controller._byobRequest = null; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._closeRequested = false; + controller._started = false; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._autoAllocateChunkSize = autoAllocateChunkSize; + controller._pendingPullIntos = new SimpleQueue(); + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableByteStreamControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableByteStreamControllerError(controller, r); + return null; + }); +} +function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) { + const controller = Object.create(ReadableByteStreamController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingByteSource.start !== undefined) { + startAlgorithm = () => underlyingByteSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingByteSource.pull !== undefined) { + pullAlgorithm = () => underlyingByteSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingByteSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingByteSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize; + if (autoAllocateChunkSize === 0) { + throw new TypeError('autoAllocateChunkSize must be greater than 0'); + } + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize); +} +function SetUpReadableStreamBYOBRequest(request, controller, view) { + request._associatedReadableByteStreamController = controller; + request._view = view; +} +// Helper functions for the ReadableStreamBYOBRequest. +function byobRequestBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`); +} +// Helper functions for the ReadableByteStreamController. +function byteStreamControllerBrandCheckException(name) { + return new TypeError(`ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`); +} + +function convertReaderOptions(options, context) { + assertDictionary(options, context); + const mode = options === null || options === void 0 ? void 0 : options.mode; + return { + mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`) + }; +} +function convertReadableStreamReaderMode(mode, context) { + mode = `${mode}`; + if (mode !== 'byob') { + throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`); + } + return mode; +} +function convertByobReadOptions(options, context) { + var _a; + assertDictionary(options, context); + const min = (_a = options === null || options === void 0 ? void 0 : options.min) !== null && _a !== void 0 ? _a : 1; + return { + min: convertUnsignedLongLongWithEnforceRange(min, `${context} has member 'min' that`) + }; +} + +// Abstract operations for the ReadableStream. +function AcquireReadableStreamBYOBReader(stream) { + return new ReadableStreamBYOBReader(stream); +} +// ReadableStream API exposed for controllers. +function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) { + stream._reader._readIntoRequests.push(readIntoRequest); +} +function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) { + const reader = stream._reader; + const readIntoRequest = reader._readIntoRequests.shift(); + if (done) { + readIntoRequest._closeSteps(chunk); + } + else { + readIntoRequest._chunkSteps(chunk); + } +} +function ReadableStreamGetNumReadIntoRequests(stream) { + return stream._reader._readIntoRequests.length; +} +function ReadableStreamHasBYOBReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamBYOBReader(reader)) { + return false; + } + return true; +} +/** + * A BYOB reader vended by a {@link ReadableStream}. + * + * @public + */ +class ReadableStreamBYOBReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + if (!IsReadableByteStreamController(stream._readableStreamController)) { + throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' + + 'source'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readIntoRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + read(view, rawOptions = {}) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('read')); + } + if (!ArrayBuffer.isView(view)) { + return promiseRejectedWith(new TypeError('view must be an array buffer view')); + } + if (view.byteLength === 0) { + return promiseRejectedWith(new TypeError('view must have non-zero byteLength')); + } + if (view.buffer.byteLength === 0) { + return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`)); + } + if (IsDetachedBuffer(view.buffer)) { + return promiseRejectedWith(new TypeError('view\'s buffer has been detached')); + } + let options; + try { + options = convertByobReadOptions(rawOptions, 'options'); + } + catch (e) { + return promiseRejectedWith(e); + } + const min = options.min; + if (min === 0) { + return promiseRejectedWith(new TypeError('options.min must be greater than 0')); + } + if (!isDataView(view)) { + if (min > view.length) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s length')); + } + } + else if (min > view.byteLength) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s byteLength')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readIntoRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: chunk => resolvePromise({ value: chunk, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamBYOBReader(this)) { + throw byobReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamBYOBReaderRelease(this); + } +} +Object.defineProperties(ReadableStreamBYOBReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } +}); +setFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel'); +setFunctionName(ReadableStreamBYOBReader.prototype.read, 'read'); +setFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBReader', + configurable: true + }); +} +// Abstract operations for the readers. +function IsReadableStreamBYOBReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) { + return false; + } + return x instanceof ReadableStreamBYOBReader; +} +function ReadableStreamBYOBReaderRead(reader, view, min, readIntoRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'errored') { + readIntoRequest._errorSteps(stream._storedError); + } + else { + ReadableByteStreamControllerPullInto(stream._readableStreamController, view, min, readIntoRequest); + } +} +function ReadableStreamBYOBReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); +} +function ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._errorSteps(e); + }); +} +// Helper functions for the ReadableStreamBYOBReader. +function byobReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`); +} + +function ExtractHighWaterMark(strategy, defaultHWM) { + const { highWaterMark } = strategy; + if (highWaterMark === undefined) { + return defaultHWM; + } + if (NumberIsNaN(highWaterMark) || highWaterMark < 0) { + throw new RangeError('Invalid highWaterMark'); + } + return highWaterMark; +} +function ExtractSizeAlgorithm(strategy) { + const { size } = strategy; + if (!size) { + return () => 1; + } + return size; +} + +function convertQueuingStrategy(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + const size = init === null || init === void 0 ? void 0 : init.size; + return { + highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark), + size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`) + }; +} +function convertQueuingStrategySize(fn, context) { + assertFunction(fn, context); + return chunk => convertUnrestrictedDouble(fn(chunk)); +} + +function convertUnderlyingSink(original, context) { + assertDictionary(original, context); + const abort = original === null || original === void 0 ? void 0 : original.abort; + const close = original === null || original === void 0 ? void 0 : original.close; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + const write = original === null || original === void 0 ? void 0 : original.write; + return { + abort: abort === undefined ? + undefined : + convertUnderlyingSinkAbortCallback(abort, original, `${context} has member 'abort' that`), + close: close === undefined ? + undefined : + convertUnderlyingSinkCloseCallback(close, original, `${context} has member 'close' that`), + start: start === undefined ? + undefined : + convertUnderlyingSinkStartCallback(start, original, `${context} has member 'start' that`), + write: write === undefined ? + undefined : + convertUnderlyingSinkWriteCallback(write, original, `${context} has member 'write' that`), + type + }; +} +function convertUnderlyingSinkAbortCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); +} +function convertUnderlyingSinkCloseCallback(fn, original, context) { + assertFunction(fn, context); + return () => promiseCall(fn, original, []); +} +function convertUnderlyingSinkStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); +} +function convertUnderlyingSinkWriteCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); +} + +function assertWritableStream(x, context) { + if (!IsWritableStream(x)) { + throw new TypeError(`${context} is not a WritableStream.`); + } +} + +function isAbortSignal(value) { + if (typeof value !== 'object' || value === null) { + return false; + } + try { + return typeof value.aborted === 'boolean'; + } + catch (_a) { + // AbortSignal.prototype.aborted throws if its brand check fails + return false; + } +} +const supportsAbortController = typeof AbortController === 'function'; +/** + * Construct a new AbortController, if supported by the platform. + * + * @internal + */ +function createAbortController() { + if (supportsAbortController) { + return new AbortController(); + } + return undefined; +} + +/** + * A writable stream represents a destination for data, into which you can write. + * + * @public + */ +class WritableStream { + constructor(rawUnderlyingSink = {}, rawStrategy = {}) { + if (rawUnderlyingSink === undefined) { + rawUnderlyingSink = null; + } + else { + assertObject(rawUnderlyingSink, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter'); + InitializeWritableStream(this); + const type = underlyingSink.type; + if (type !== undefined) { + throw new RangeError('Invalid type is specified'); + } + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm); + } + /** + * Returns whether or not the writable stream is locked to a writer. + */ + get locked() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('locked'); + } + return IsWritableStreamLocked(this); + } + /** + * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be + * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort + * mechanism of the underlying sink. + * + * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled + * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel + * the stream) if the stream is currently locked. + */ + abort(reason = undefined) { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('abort')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer')); + } + return WritableStreamAbort(this, reason); + } + /** + * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its + * close behavior. During this time any further attempts to write will fail (without erroring the stream). + * + * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream + * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with + * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked. + */ + close() { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('close')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer')); + } + if (WritableStreamCloseQueuedOrInFlight(this)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamClose(this); + } + /** + * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream + * is locked, no other writer can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to write to a stream + * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at + * the same time, which would cause the resulting written data to be unpredictable and probably useless. + */ + getWriter() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('getWriter'); + } + return AcquireWritableStreamDefaultWriter(this); + } +} +Object.defineProperties(WritableStream.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + getWriter: { enumerable: true }, + locked: { enumerable: true } +}); +setFunctionName(WritableStream.prototype.abort, 'abort'); +setFunctionName(WritableStream.prototype.close, 'close'); +setFunctionName(WritableStream.prototype.getWriter, 'getWriter'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, { + value: 'WritableStream', + configurable: true + }); +} +// Abstract operations for the WritableStream. +function AcquireWritableStreamDefaultWriter(stream) { + return new WritableStreamDefaultWriter(stream); +} +// Throws if and only if startAlgorithm throws. +function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(WritableStream.prototype); + InitializeWritableStream(stream); + const controller = Object.create(WritableStreamDefaultController.prototype); + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + return stream; +} +function InitializeWritableStream(stream) { + stream._state = 'writable'; + // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is + // 'erroring' or 'errored'. May be set to an undefined value. + stream._storedError = undefined; + stream._writer = undefined; + // Initialize to undefined first because the constructor of the controller checks this + // variable to validate the caller. + stream._writableStreamController = undefined; + // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data + // producer without waiting for the queued writes to finish. + stream._writeRequests = new SimpleQueue(); + // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents + // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here. + stream._inFlightWriteRequest = undefined; + // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer + // has been detached. + stream._closeRequest = undefined; + // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it + // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here. + stream._inFlightCloseRequest = undefined; + // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached. + stream._pendingAbortRequest = undefined; + // The backpressure signal set by the controller. + stream._backpressure = false; +} +function IsWritableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) { + return false; + } + return x instanceof WritableStream; +} +function IsWritableStreamLocked(stream) { + if (stream._writer === undefined) { + return false; + } + return true; +} +function WritableStreamAbort(stream, reason) { + var _a; + if (stream._state === 'closed' || stream._state === 'errored') { + return promiseResolvedWith(undefined); + } + stream._writableStreamController._abortReason = reason; + (_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort(reason); + // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring', + // but it doesn't know that signaling abort runs author code that might have changed the state. + // Widen the type again by casting to WritableStreamState. + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseResolvedWith(undefined); + } + if (stream._pendingAbortRequest !== undefined) { + return stream._pendingAbortRequest._promise; + } + let wasAlreadyErroring = false; + if (state === 'erroring') { + wasAlreadyErroring = true; + // reason will not be used, so don't keep a reference to it. + reason = undefined; + } + const promise = newPromise((resolve, reject) => { + stream._pendingAbortRequest = { + _promise: undefined, + _resolve: resolve, + _reject: reject, + _reason: reason, + _wasAlreadyErroring: wasAlreadyErroring + }; + }); + stream._pendingAbortRequest._promise = promise; + if (!wasAlreadyErroring) { + WritableStreamStartErroring(stream, reason); + } + return promise; +} +function WritableStreamClose(stream) { + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseRejectedWith(new TypeError(`The stream (in ${state} state) is not in the writable state and cannot be closed`)); + } + const promise = newPromise((resolve, reject) => { + const closeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._closeRequest = closeRequest; + }); + const writer = stream._writer; + if (writer !== undefined && stream._backpressure && state === 'writable') { + defaultWriterReadyPromiseResolve(writer); + } + WritableStreamDefaultControllerClose(stream._writableStreamController); + return promise; +} +// WritableStream API exposed for controllers. +function WritableStreamAddWriteRequest(stream) { + const promise = newPromise((resolve, reject) => { + const writeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._writeRequests.push(writeRequest); + }); + return promise; +} +function WritableStreamDealWithRejection(stream, error) { + const state = stream._state; + if (state === 'writable') { + WritableStreamStartErroring(stream, error); + return; + } + WritableStreamFinishErroring(stream); +} +function WritableStreamStartErroring(stream, reason) { + const controller = stream._writableStreamController; + stream._state = 'erroring'; + stream._storedError = reason; + const writer = stream._writer; + if (writer !== undefined) { + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason); + } + if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) { + WritableStreamFinishErroring(stream); + } +} +function WritableStreamFinishErroring(stream) { + stream._state = 'errored'; + stream._writableStreamController[ErrorSteps](); + const storedError = stream._storedError; + stream._writeRequests.forEach(writeRequest => { + writeRequest._reject(storedError); + }); + stream._writeRequests = new SimpleQueue(); + if (stream._pendingAbortRequest === undefined) { + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const abortRequest = stream._pendingAbortRequest; + stream._pendingAbortRequest = undefined; + if (abortRequest._wasAlreadyErroring) { + abortRequest._reject(storedError); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const promise = stream._writableStreamController[AbortSteps](abortRequest._reason); + uponPromise(promise, () => { + abortRequest._resolve(); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }, (reason) => { + abortRequest._reject(reason); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }); +} +function WritableStreamFinishInFlightWrite(stream) { + stream._inFlightWriteRequest._resolve(undefined); + stream._inFlightWriteRequest = undefined; +} +function WritableStreamFinishInFlightWriteWithError(stream, error) { + stream._inFlightWriteRequest._reject(error); + stream._inFlightWriteRequest = undefined; + WritableStreamDealWithRejection(stream, error); +} +function WritableStreamFinishInFlightClose(stream) { + stream._inFlightCloseRequest._resolve(undefined); + stream._inFlightCloseRequest = undefined; + const state = stream._state; + if (state === 'erroring') { + // The error was too late to do anything, so it is ignored. + stream._storedError = undefined; + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._resolve(); + stream._pendingAbortRequest = undefined; + } + } + stream._state = 'closed'; + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseResolve(writer); + } +} +function WritableStreamFinishInFlightCloseWithError(stream, error) { + stream._inFlightCloseRequest._reject(error); + stream._inFlightCloseRequest = undefined; + // Never execute sink abort() after sink close(). + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._reject(error); + stream._pendingAbortRequest = undefined; + } + WritableStreamDealWithRejection(stream, error); +} +// TODO(ricea): Fix alphabetical order. +function WritableStreamCloseQueuedOrInFlight(stream) { + if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; +} +function WritableStreamHasOperationMarkedInFlight(stream) { + if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; +} +function WritableStreamMarkCloseRequestInFlight(stream) { + stream._inFlightCloseRequest = stream._closeRequest; + stream._closeRequest = undefined; +} +function WritableStreamMarkFirstWriteRequestInFlight(stream) { + stream._inFlightWriteRequest = stream._writeRequests.shift(); +} +function WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) { + if (stream._closeRequest !== undefined) { + stream._closeRequest._reject(stream._storedError); + stream._closeRequest = undefined; + } + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseReject(writer, stream._storedError); + } +} +function WritableStreamUpdateBackpressure(stream, backpressure) { + const writer = stream._writer; + if (writer !== undefined && backpressure !== stream._backpressure) { + if (backpressure) { + defaultWriterReadyPromiseReset(writer); + } + else { + defaultWriterReadyPromiseResolve(writer); + } + } + stream._backpressure = backpressure; +} +/** + * A default writer vended by a {@link WritableStream}. + * + * @public + */ +class WritableStreamDefaultWriter { + constructor(stream) { + assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter'); + assertWritableStream(stream, 'First parameter'); + if (IsWritableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive writing by another writer'); + } + this._ownerWritableStream = stream; + stream._writer = this; + const state = stream._state; + if (state === 'writable') { + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) { + defaultWriterReadyPromiseInitialize(this); + } + else { + defaultWriterReadyPromiseInitializeAsResolved(this); + } + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'erroring') { + defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError); + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'closed') { + defaultWriterReadyPromiseInitializeAsResolved(this); + defaultWriterClosedPromiseInitializeAsResolved(this); + } + else { + const storedError = stream._storedError; + defaultWriterReadyPromiseInitializeAsRejected(this, storedError); + defaultWriterClosedPromiseInitializeAsRejected(this, storedError); + } + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the writer’s lock is released before the stream finishes closing. + */ + get closed() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full. + * A producer can use this information to determine the right amount of data to write. + * + * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort + * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when + * the writer’s lock is released. + */ + get desiredSize() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('desiredSize'); + } + if (this._ownerWritableStream === undefined) { + throw defaultWriterLockException('desiredSize'); + } + return WritableStreamDefaultWriterGetDesiredSize(this); + } + /** + * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions + * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips + * back to zero or below, the getter will return a new promise that stays pending until the next transition. + * + * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become + * rejected. + */ + get ready() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('ready')); + } + return this._readyPromise; + } + /** + * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}. + */ + abort(reason = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('abort')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('abort')); + } + return WritableStreamDefaultWriterAbort(this, reason); + } + /** + * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}. + */ + close() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('close')); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return promiseRejectedWith(defaultWriterLockException('close')); + } + if (WritableStreamCloseQueuedOrInFlight(stream)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamDefaultWriterClose(this); + } + /** + * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active. + * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from + * now on; otherwise, the writer will appear closed. + * + * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the + * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled). + * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents + * other producers from writing in an interleaved manner. + */ + releaseLock() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('releaseLock'); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return; + } + WritableStreamDefaultWriterRelease(this); + } + write(chunk = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('write')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + return WritableStreamDefaultWriterWrite(this, chunk); + } +} +Object.defineProperties(WritableStreamDefaultWriter.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + releaseLock: { enumerable: true }, + write: { enumerable: true }, + closed: { enumerable: true }, + desiredSize: { enumerable: true }, + ready: { enumerable: true } +}); +setFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort'); +setFunctionName(WritableStreamDefaultWriter.prototype.close, 'close'); +setFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock'); +setFunctionName(WritableStreamDefaultWriter.prototype.write, 'write'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultWriter', + configurable: true + }); +} +// Abstract operations for the WritableStreamDefaultWriter. +function IsWritableStreamDefaultWriter(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultWriter; +} +// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check. +function WritableStreamDefaultWriterAbort(writer, reason) { + const stream = writer._ownerWritableStream; + return WritableStreamAbort(stream, reason); +} +function WritableStreamDefaultWriterClose(writer) { + const stream = writer._ownerWritableStream; + return WritableStreamClose(stream); +} +function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseResolvedWith(undefined); + } + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + return WritableStreamDefaultWriterClose(writer); +} +function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) { + if (writer._closedPromiseState === 'pending') { + defaultWriterClosedPromiseReject(writer, error); + } + else { + defaultWriterClosedPromiseResetToRejected(writer, error); + } +} +function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) { + if (writer._readyPromiseState === 'pending') { + defaultWriterReadyPromiseReject(writer, error); + } + else { + defaultWriterReadyPromiseResetToRejected(writer, error); + } +} +function WritableStreamDefaultWriterGetDesiredSize(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (state === 'errored' || state === 'erroring') { + return null; + } + if (state === 'closed') { + return 0; + } + return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController); +} +function WritableStreamDefaultWriterRelease(writer) { + const stream = writer._ownerWritableStream; + const releasedError = new TypeError(`Writer was released and can no longer be used to monitor the stream's closedness`); + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError); + // The state transitions to "errored" before the sink abort() method runs, but the writer.closed promise is not + // rejected until afterwards. This means that simply testing state will not work. + WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError); + stream._writer = undefined; + writer._ownerWritableStream = undefined; +} +function WritableStreamDefaultWriterWrite(writer, chunk) { + const stream = writer._ownerWritableStream; + const controller = stream._writableStreamController; + const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk); + if (stream !== writer._ownerWritableStream) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + const state = stream._state; + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to')); + } + if (state === 'erroring') { + return promiseRejectedWith(stream._storedError); + } + const promise = WritableStreamAddWriteRequest(stream); + WritableStreamDefaultControllerWrite(controller, chunk, chunkSize); + return promise; +} +const closeSentinel = {}; +/** + * Allows control of a {@link WritableStream | writable stream}'s state and internal queue. + * + * @public + */ +class WritableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted. + * + * @deprecated + * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177. + * Use {@link WritableStreamDefaultController.signal}'s `reason` instead. + */ + get abortReason() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('abortReason'); + } + return this._abortReason; + } + /** + * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted. + */ + get signal() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('signal'); + } + if (this._abortController === undefined) { + // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`. + // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill, + // so instead we only implement support for `signal` if we find a global `AbortController` constructor. + throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported'); + } + return this._abortController.signal; + } + /** + * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`. + * + * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying + * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the + * normal lifecycle of interactions with the underlying sink. + */ + error(e = undefined) { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('error'); + } + const state = this._controlledWritableStream._state; + if (state !== 'writable') { + // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so + // just treat it as a no-op. + return; + } + WritableStreamDefaultControllerError(this, e); + } + /** @internal */ + [AbortSteps](reason) { + const result = this._abortAlgorithm(reason); + WritableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [ErrorSteps]() { + ResetQueue(this); + } +} +Object.defineProperties(WritableStreamDefaultController.prototype, { + abortReason: { enumerable: true }, + signal: { enumerable: true }, + error: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultController', + configurable: true + }); +} +// Abstract operations implementing interface required by the WritableStream. +function IsWritableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultController; +} +function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledWritableStream = stream; + stream._writableStreamController = controller; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._abortReason = undefined; + controller._abortController = createAbortController(); + controller._started = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._writeAlgorithm = writeAlgorithm; + controller._closeAlgorithm = closeAlgorithm; + controller._abortAlgorithm = abortAlgorithm; + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + const startResult = startAlgorithm(); + const startPromise = promiseResolvedWith(startResult); + uponPromise(startPromise, () => { + controller._started = true; + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, r => { + controller._started = true; + WritableStreamDealWithRejection(stream, r); + return null; + }); +} +function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) { + const controller = Object.create(WritableStreamDefaultController.prototype); + let startAlgorithm; + let writeAlgorithm; + let closeAlgorithm; + let abortAlgorithm; + if (underlyingSink.start !== undefined) { + startAlgorithm = () => underlyingSink.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSink.write !== undefined) { + writeAlgorithm = chunk => underlyingSink.write(chunk, controller); + } + else { + writeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.close !== undefined) { + closeAlgorithm = () => underlyingSink.close(); + } + else { + closeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.abort !== undefined) { + abortAlgorithm = reason => underlyingSink.abort(reason); + } + else { + abortAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); +} +// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls. +function WritableStreamDefaultControllerClearAlgorithms(controller) { + controller._writeAlgorithm = undefined; + controller._closeAlgorithm = undefined; + controller._abortAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; +} +function WritableStreamDefaultControllerClose(controller) { + EnqueueValueWithSize(controller, closeSentinel, 0); + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); +} +function WritableStreamDefaultControllerGetChunkSize(controller, chunk) { + try { + return controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE); + return 1; + } +} +function WritableStreamDefaultControllerGetDesiredSize(controller) { + return controller._strategyHWM - controller._queueTotalSize; +} +function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) { + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE); + return; + } + const stream = controller._controlledWritableStream; + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); +} +// Abstract operations for the WritableStreamDefaultController. +function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) { + const stream = controller._controlledWritableStream; + if (!controller._started) { + return; + } + if (stream._inFlightWriteRequest !== undefined) { + return; + } + const state = stream._state; + if (state === 'erroring') { + WritableStreamFinishErroring(stream); + return; + } + if (controller._queue.length === 0) { + return; + } + const value = PeekQueueValue(controller); + if (value === closeSentinel) { + WritableStreamDefaultControllerProcessClose(controller); + } + else { + WritableStreamDefaultControllerProcessWrite(controller, value); + } +} +function WritableStreamDefaultControllerErrorIfNeeded(controller, error) { + if (controller._controlledWritableStream._state === 'writable') { + WritableStreamDefaultControllerError(controller, error); + } +} +function WritableStreamDefaultControllerProcessClose(controller) { + const stream = controller._controlledWritableStream; + WritableStreamMarkCloseRequestInFlight(stream); + DequeueValue(controller); + const sinkClosePromise = controller._closeAlgorithm(); + WritableStreamDefaultControllerClearAlgorithms(controller); + uponPromise(sinkClosePromise, () => { + WritableStreamFinishInFlightClose(stream); + return null; + }, reason => { + WritableStreamFinishInFlightCloseWithError(stream, reason); + return null; + }); +} +function WritableStreamDefaultControllerProcessWrite(controller, chunk) { + const stream = controller._controlledWritableStream; + WritableStreamMarkFirstWriteRequestInFlight(stream); + const sinkWritePromise = controller._writeAlgorithm(chunk); + uponPromise(sinkWritePromise, () => { + WritableStreamFinishInFlightWrite(stream); + const state = stream._state; + DequeueValue(controller); + if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, reason => { + if (stream._state === 'writable') { + WritableStreamDefaultControllerClearAlgorithms(controller); + } + WritableStreamFinishInFlightWriteWithError(stream, reason); + return null; + }); +} +function WritableStreamDefaultControllerGetBackpressure(controller) { + const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller); + return desiredSize <= 0; +} +// A client of WritableStreamDefaultController may use these functions directly to bypass state check. +function WritableStreamDefaultControllerError(controller, error) { + const stream = controller._controlledWritableStream; + WritableStreamDefaultControllerClearAlgorithms(controller); + WritableStreamStartErroring(stream, error); +} +// Helper functions for the WritableStream. +function streamBrandCheckException$2(name) { + return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`); +} +// Helper functions for the WritableStreamDefaultController. +function defaultControllerBrandCheckException$2(name) { + return new TypeError(`WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`); +} +// Helper functions for the WritableStreamDefaultWriter. +function defaultWriterBrandCheckException(name) { + return new TypeError(`WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`); +} +function defaultWriterLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released writer'); +} +function defaultWriterClosedPromiseInitialize(writer) { + writer._closedPromise = newPromise((resolve, reject) => { + writer._closedPromise_resolve = resolve; + writer._closedPromise_reject = reject; + writer._closedPromiseState = 'pending'; + }); +} +function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseReject(writer, reason); +} +function defaultWriterClosedPromiseInitializeAsResolved(writer) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseResolve(writer); +} +function defaultWriterClosedPromiseReject(writer, reason) { + if (writer._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._closedPromise); + writer._closedPromise_reject(reason); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'rejected'; +} +function defaultWriterClosedPromiseResetToRejected(writer, reason) { + defaultWriterClosedPromiseInitializeAsRejected(writer, reason); +} +function defaultWriterClosedPromiseResolve(writer) { + if (writer._closedPromise_resolve === undefined) { + return; + } + writer._closedPromise_resolve(undefined); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'resolved'; +} +function defaultWriterReadyPromiseInitialize(writer) { + writer._readyPromise = newPromise((resolve, reject) => { + writer._readyPromise_resolve = resolve; + writer._readyPromise_reject = reject; + }); + writer._readyPromiseState = 'pending'; +} +function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseReject(writer, reason); +} +function defaultWriterReadyPromiseInitializeAsResolved(writer) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseResolve(writer); +} +function defaultWriterReadyPromiseReject(writer, reason) { + if (writer._readyPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._readyPromise); + writer._readyPromise_reject(reason); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'rejected'; +} +function defaultWriterReadyPromiseReset(writer) { + defaultWriterReadyPromiseInitialize(writer); +} +function defaultWriterReadyPromiseResetToRejected(writer, reason) { + defaultWriterReadyPromiseInitializeAsRejected(writer, reason); +} +function defaultWriterReadyPromiseResolve(writer) { + if (writer._readyPromise_resolve === undefined) { + return; + } + writer._readyPromise_resolve(undefined); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'fulfilled'; +} + +/// +function getGlobals() { + if (typeof globalThis !== 'undefined') { + return globalThis; + } + else if (typeof self !== 'undefined') { + return self; + } + else if (typeof global !== 'undefined') { + return global; + } + return undefined; +} +const globals = getGlobals(); + +/// +function isDOMExceptionConstructor(ctor) { + if (!(typeof ctor === 'function' || typeof ctor === 'object')) { + return false; + } + if (ctor.name !== 'DOMException') { + return false; + } + try { + new ctor(); + return true; + } + catch (_a) { + return false; + } +} +/** + * Support: + * - Web browsers + * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87) + */ +function getFromGlobal() { + const ctor = globals === null || globals === void 0 ? void 0 : globals.DOMException; + return isDOMExceptionConstructor(ctor) ? ctor : undefined; +} +/** + * Support: + * - All platforms + */ +function createPolyfill() { + // eslint-disable-next-line @typescript-eslint/no-shadow + const ctor = function DOMException(message, name) { + this.message = message || ''; + this.name = name || 'Error'; + if (Error.captureStackTrace) { + Error.captureStackTrace(this, this.constructor); + } + }; + setFunctionName(ctor, 'DOMException'); + ctor.prototype = Object.create(Error.prototype); + Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true }); + return ctor; +} +// eslint-disable-next-line @typescript-eslint/no-redeclare +const DOMException = getFromGlobal() || createPolyfill(); + +function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) { + const reader = AcquireReadableStreamDefaultReader(source); + const writer = AcquireWritableStreamDefaultWriter(dest); + source._disturbed = true; + let shuttingDown = false; + // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown. + let currentWrite = promiseResolvedWith(undefined); + return newPromise((resolve, reject) => { + let abortAlgorithm; + if (signal !== undefined) { + abortAlgorithm = () => { + const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError'); + const actions = []; + if (!preventAbort) { + actions.push(() => { + if (dest._state === 'writable') { + return WritableStreamAbort(dest, error); + } + return promiseResolvedWith(undefined); + }); + } + if (!preventCancel) { + actions.push(() => { + if (source._state === 'readable') { + return ReadableStreamCancel(source, error); + } + return promiseResolvedWith(undefined); + }); + } + shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error); + }; + if (signal.aborted) { + abortAlgorithm(); + return; + } + signal.addEventListener('abort', abortAlgorithm); + } + // Using reader and writer, read all chunks from this and write them to dest + // - Backpressure must be enforced + // - Shutdown must stop all activity + function pipeLoop() { + return newPromise((resolveLoop, rejectLoop) => { + function next(done) { + if (done) { + resolveLoop(); + } + else { + // Use `PerformPromiseThen` instead of `uponPromise` to avoid + // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers + PerformPromiseThen(pipeStep(), next, rejectLoop); + } + } + next(false); + }); + } + function pipeStep() { + if (shuttingDown) { + return promiseResolvedWith(true); + } + return PerformPromiseThen(writer._readyPromise, () => { + return newPromise((resolveRead, rejectRead) => { + ReadableStreamDefaultReaderRead(reader, { + _chunkSteps: chunk => { + currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop); + resolveRead(false); + }, + _closeSteps: () => resolveRead(true), + _errorSteps: rejectRead + }); + }); + }); + } + // Errors must be propagated forward + isOrBecomesErrored(source, reader._closedPromise, storedError => { + if (!preventAbort) { + shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Errors must be propagated backward + isOrBecomesErrored(dest, writer._closedPromise, storedError => { + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Closing must be propagated forward + isOrBecomesClosed(source, reader._closedPromise, () => { + if (!preventClose) { + shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer)); + } + else { + shutdown(); + } + return null; + }); + // Closing must be propagated backward + if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') { + const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it'); + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed); + } + else { + shutdown(true, destClosed); + } + } + setPromiseIsHandledToTrue(pipeLoop()); + function waitForWritesToFinish() { + // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait + // for that too. + const oldCurrentWrite = currentWrite; + return PerformPromiseThen(currentWrite, () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined); + } + function isOrBecomesErrored(stream, promise, action) { + if (stream._state === 'errored') { + action(stream._storedError); + } + else { + uponRejection(promise, action); + } + } + function isOrBecomesClosed(stream, promise, action) { + if (stream._state === 'closed') { + action(); + } + else { + uponFulfillment(promise, action); + } + } + function shutdownWithAction(action, originalIsError, originalError) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), doTheRest); + } + else { + doTheRest(); + } + function doTheRest() { + uponPromise(action(), () => finalize(originalIsError, originalError), newError => finalize(true, newError)); + return null; + } + } + function shutdown(isError, error) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error)); + } + else { + finalize(isError, error); + } + } + function finalize(isError, error) { + WritableStreamDefaultWriterRelease(writer); + ReadableStreamReaderGenericRelease(reader); + if (signal !== undefined) { + signal.removeEventListener('abort', abortAlgorithm); + } + if (isError) { + reject(error); + } + else { + resolve(undefined); + } + return null; + } + }); +} + +/** + * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue. + * + * @public + */ +class ReadableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('desiredSize'); + } + return ReadableStreamDefaultControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('close'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits close'); + } + ReadableStreamDefaultControllerClose(this); + } + enqueue(chunk = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('enqueue'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits enqueue'); + } + return ReadableStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('error'); + } + ReadableStreamDefaultControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableStream; + if (this._queue.length > 0) { + const chunk = DequeueValue(this); + if (this._closeRequested && this._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(this); + ReadableStreamClose(stream); + } + else { + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + readRequest._chunkSteps(chunk); + } + else { + ReadableStreamAddReadRequest(stream, readRequest); + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + } + /** @internal */ + [ReleaseSteps]() { + // Do nothing. + } +} +Object.defineProperties(ReadableStreamDefaultController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(ReadableStreamDefaultController.prototype.close, 'close'); +setFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue'); +setFunctionName(ReadableStreamDefaultController.prototype.error, 'error'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultController', + configurable: true + }); +} +// Abstract operations for the ReadableStreamDefaultController. +function IsReadableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) { + return false; + } + return x instanceof ReadableStreamDefaultController; +} +function ReadableStreamDefaultControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableStreamDefaultControllerError(controller, e); + return null; + }); +} +function ReadableStreamDefaultControllerShouldCallPull(controller) { + const stream = controller._controlledReadableStream; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return false; + } + if (!controller._started) { + return false; + } + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; +} +function ReadableStreamDefaultControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; +} +// A client of ReadableStreamDefaultController may use these functions directly to bypass state check. +function ReadableStreamDefaultControllerClose(controller) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + controller._closeRequested = true; + if (controller._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } +} +function ReadableStreamDefaultControllerEnqueue(controller, chunk) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + ReadableStreamFulfillReadRequest(stream, chunk, false); + } + else { + let chunkSize; + try { + chunkSize = controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + ReadableStreamDefaultControllerError(controller, chunkSizeE); + throw chunkSizeE; + } + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + ReadableStreamDefaultControllerError(controller, enqueueE); + throw enqueueE; + } + } + ReadableStreamDefaultControllerCallPullIfNeeded(controller); +} +function ReadableStreamDefaultControllerError(controller, e) { + const stream = controller._controlledReadableStream; + if (stream._state !== 'readable') { + return; + } + ResetQueue(controller); + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); +} +function ReadableStreamDefaultControllerGetDesiredSize(controller) { + const state = controller._controlledReadableStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; +} +// This is used in the implementation of TransformStream. +function ReadableStreamDefaultControllerHasBackpressure(controller) { + if (ReadableStreamDefaultControllerShouldCallPull(controller)) { + return false; + } + return true; +} +function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) { + const state = controller._controlledReadableStream._state; + if (!controller._closeRequested && state === 'readable') { + return true; + } + return false; +} +function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledReadableStream = stream; + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._started = false; + controller._closeRequested = false; + controller._pullAgain = false; + controller._pulling = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableStreamDefaultControllerError(controller, r); + return null; + }); +} +function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) { + const controller = Object.create(ReadableStreamDefaultController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingSource.start !== undefined) { + startAlgorithm = () => underlyingSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSource.pull !== undefined) { + pullAlgorithm = () => underlyingSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); +} +// Helper functions for the ReadableStreamDefaultController. +function defaultControllerBrandCheckException$1(name) { + return new TypeError(`ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`); +} + +function ReadableStreamTee(stream, cloneForBranch2) { + if (IsReadableByteStreamController(stream._readableStreamController)) { + return ReadableByteStreamTee(stream); + } + return ReadableStreamDefaultTee(stream); +} +function ReadableStreamDefaultTee(stream, cloneForBranch2) { + const reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgain = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function pullAlgorithm() { + if (reading) { + readAgain = true; + return promiseResolvedWith(undefined); + } + reading = true; + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgain = false; + const chunk1 = chunk; + const chunk2 = chunk; + // There is no way to access the cloning code right now in the reference implementation. + // If we add one then we'll need an implementation for serializable objects. + // if (!canceled2 && cloneForBranch2) { + // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2)); + // } + if (!canceled1) { + ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgain) { + pullAlgorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableStreamDefaultControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableStreamDefaultControllerClose(branch2._readableStreamController); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + // do nothing + } + branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm); + branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm); + uponRejection(reader._closedPromise, (r) => { + ReadableStreamDefaultControllerError(branch1._readableStreamController, r); + ReadableStreamDefaultControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + return [branch1, branch2]; +} +function ReadableByteStreamTee(stream) { + let reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgainForBranch1 = false; + let readAgainForBranch2 = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function forwardReaderError(thisReader) { + uponRejection(thisReader._closedPromise, r => { + if (thisReader !== reader) { + return null; + } + ReadableByteStreamControllerError(branch1._readableStreamController, r); + ReadableByteStreamControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + } + function pullWithDefaultReader() { + if (IsReadableStreamBYOBReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamDefaultReader(stream); + forwardReaderError(reader); + } + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const chunk1 = chunk; + let chunk2 = chunk; + if (!canceled1 && !canceled2) { + try { + chunk2 = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(branch1._readableStreamController, cloneE); + ReadableByteStreamControllerError(branch2._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + } + if (!canceled1) { + ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableByteStreamControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableByteStreamControllerClose(branch2._readableStreamController); + } + if (branch1._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch1._readableStreamController, 0); + } + if (branch2._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch2._readableStreamController, 0); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + } + function pullWithBYOBReader(view, forBranch2) { + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamBYOBReader(stream); + forwardReaderError(reader); + } + const byobBranch = forBranch2 ? branch2 : branch1; + const otherBranch = forBranch2 ? branch1 : branch2; + const readIntoRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!otherCanceled) { + let clonedChunk; + try { + clonedChunk = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE); + ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk); + } + else if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: chunk => { + reading = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!byobCanceled) { + ReadableByteStreamControllerClose(byobBranch._readableStreamController); + } + if (!otherCanceled) { + ReadableByteStreamControllerClose(otherBranch._readableStreamController); + } + if (chunk !== undefined) { + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0); + } + } + if (!byobCanceled || !otherCanceled) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest); + } + function pull1Algorithm() { + if (reading) { + readAgainForBranch1 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, false); + } + return promiseResolvedWith(undefined); + } + function pull2Algorithm() { + if (reading) { + readAgainForBranch2 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, true); + } + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + return; + } + branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm); + branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm); + forwardReaderError(reader); + return [branch1, branch2]; +} + +function isReadableStreamLike(stream) { + return typeIsObject(stream) && typeof stream.getReader !== 'undefined'; +} + +function ReadableStreamFrom(source) { + if (isReadableStreamLike(source)) { + return ReadableStreamFromDefaultReader(source.getReader()); + } + return ReadableStreamFromIterable(source); +} +function ReadableStreamFromIterable(asyncIterable) { + let stream; + const iteratorRecord = GetIterator(asyncIterable, 'async'); + const startAlgorithm = noop; + function pullAlgorithm() { + let nextResult; + try { + nextResult = IteratorNext(iteratorRecord); + } + catch (e) { + return promiseRejectedWith(e); + } + const nextPromise = promiseResolvedWith(nextResult); + return transformPromiseWith(nextPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object'); + } + const done = IteratorComplete(iterResult); + if (done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = IteratorValue(iterResult); + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + const iterator = iteratorRecord.iterator; + let returnMethod; + try { + returnMethod = GetMethod(iterator, 'return'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (returnMethod === undefined) { + return promiseResolvedWith(undefined); + } + let returnResult; + try { + returnResult = reflectCall(returnMethod, iterator, [reason]); + } + catch (e) { + return promiseRejectedWith(e); + } + const returnPromise = promiseResolvedWith(returnResult); + return transformPromiseWith(returnPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object'); + } + return undefined; + }); + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; +} +function ReadableStreamFromDefaultReader(reader) { + let stream; + const startAlgorithm = noop; + function pullAlgorithm() { + let readPromise; + try { + readPromise = reader.read(); + } + catch (e) { + return promiseRejectedWith(e); + } + return transformPromiseWith(readPromise, readResult => { + if (!typeIsObject(readResult)) { + throw new TypeError('The promise returned by the reader.read() method must fulfill with an object'); + } + if (readResult.done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = readResult.value; + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + try { + return promiseResolvedWith(reader.cancel(reason)); + } + catch (e) { + return promiseRejectedWith(e); + } + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; +} + +function convertUnderlyingDefaultOrByteSource(source, context) { + assertDictionary(source, context); + const original = source; + const autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize; + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const pull = original === null || original === void 0 ? void 0 : original.pull; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + return { + autoAllocateChunkSize: autoAllocateChunkSize === undefined ? + undefined : + convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, `${context} has member 'autoAllocateChunkSize' that`), + cancel: cancel === undefined ? + undefined : + convertUnderlyingSourceCancelCallback(cancel, original, `${context} has member 'cancel' that`), + pull: pull === undefined ? + undefined : + convertUnderlyingSourcePullCallback(pull, original, `${context} has member 'pull' that`), + start: start === undefined ? + undefined : + convertUnderlyingSourceStartCallback(start, original, `${context} has member 'start' that`), + type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`) + }; +} +function convertUnderlyingSourceCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); +} +function convertUnderlyingSourcePullCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); +} +function convertUnderlyingSourceStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); +} +function convertReadableStreamType(type, context) { + type = `${type}`; + if (type !== 'bytes') { + throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`); + } + return type; +} + +function convertIteratorOptions(options, context) { + assertDictionary(options, context); + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + return { preventCancel: Boolean(preventCancel) }; +} + +function convertPipeOptions(options, context) { + assertDictionary(options, context); + const preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort; + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + const preventClose = options === null || options === void 0 ? void 0 : options.preventClose; + const signal = options === null || options === void 0 ? void 0 : options.signal; + if (signal !== undefined) { + assertAbortSignal(signal, `${context} has member 'signal' that`); + } + return { + preventAbort: Boolean(preventAbort), + preventCancel: Boolean(preventCancel), + preventClose: Boolean(preventClose), + signal + }; +} +function assertAbortSignal(signal, context) { + if (!isAbortSignal(signal)) { + throw new TypeError(`${context} is not an AbortSignal.`); + } +} + +function convertReadableWritablePair(pair, context) { + assertDictionary(pair, context); + const readable = pair === null || pair === void 0 ? void 0 : pair.readable; + assertRequiredField(readable, 'readable', 'ReadableWritablePair'); + assertReadableStream(readable, `${context} has member 'readable' that`); + const writable = pair === null || pair === void 0 ? void 0 : pair.writable; + assertRequiredField(writable, 'writable', 'ReadableWritablePair'); + assertWritableStream(writable, `${context} has member 'writable' that`); + return { readable, writable }; +} + +/** + * A readable stream represents a source of data, from which you can read. + * + * @public + */ +class ReadableStream { + constructor(rawUnderlyingSource = {}, rawStrategy = {}) { + if (rawUnderlyingSource === undefined) { + rawUnderlyingSource = null; + } + else { + assertObject(rawUnderlyingSource, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter'); + InitializeReadableStream(this); + if (underlyingSource.type === 'bytes') { + if (strategy.size !== undefined) { + throw new RangeError('The strategy for a byte stream cannot have a size function'); + } + const highWaterMark = ExtractHighWaterMark(strategy, 0); + SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark); + } + else { + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm); + } + } + /** + * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}. + */ + get locked() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('locked'); + } + return IsReadableStreamLocked(this); + } + /** + * Cancels the stream, signaling a loss of interest in the stream by a consumer. + * + * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()} + * method, which might or might not use it. + */ + cancel(reason = undefined) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('cancel')); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader')); + } + return ReadableStreamCancel(this, reason); + } + getReader(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('getReader'); + } + const options = convertReaderOptions(rawOptions, 'First parameter'); + if (options.mode === undefined) { + return AcquireReadableStreamDefaultReader(this); + } + return AcquireReadableStreamBYOBReader(this); + } + pipeThrough(rawTransform, rawOptions = {}) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('pipeThrough'); + } + assertRequiredArgument(rawTransform, 1, 'pipeThrough'); + const transform = convertReadableWritablePair(rawTransform, 'First parameter'); + const options = convertPipeOptions(rawOptions, 'Second parameter'); + if (IsReadableStreamLocked(this)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream'); + } + if (IsWritableStreamLocked(transform.writable)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream'); + } + const promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + setPromiseIsHandledToTrue(promise); + return transform.readable; + } + pipeTo(destination, rawOptions = {}) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('pipeTo')); + } + if (destination === undefined) { + return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`); + } + if (!IsWritableStream(destination)) { + return promiseRejectedWith(new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)); + } + let options; + try { + options = convertPipeOptions(rawOptions, 'Second parameter'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')); + } + if (IsWritableStreamLocked(destination)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')); + } + return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + } + /** + * Tees this readable stream, returning a two-element array containing the two resulting branches as + * new {@link ReadableStream} instances. + * + * Teeing a stream will lock it, preventing any other consumer from acquiring a reader. + * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be + * propagated to the stream's underlying source. + * + * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable, + * this could allow interference between the two branches. + */ + tee() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('tee'); + } + const branches = ReadableStreamTee(this); + return CreateArrayFromList(branches); + } + values(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('values'); + } + const options = convertIteratorOptions(rawOptions, 'First parameter'); + return AcquireReadableStreamAsyncIterator(this, options.preventCancel); + } + [SymbolAsyncIterator](options) { + // Stub implementation, overridden below + return this.values(options); + } + /** + * Creates a new ReadableStream wrapping the provided iterable or async iterable. + * + * This can be used to adapt various kinds of objects into a readable stream, + * such as an array, an async generator, or a Node.js readable stream. + */ + static from(asyncIterable) { + return ReadableStreamFrom(asyncIterable); + } +} +Object.defineProperties(ReadableStream, { + from: { enumerable: true } +}); +Object.defineProperties(ReadableStream.prototype, { + cancel: { enumerable: true }, + getReader: { enumerable: true }, + pipeThrough: { enumerable: true }, + pipeTo: { enumerable: true }, + tee: { enumerable: true }, + values: { enumerable: true }, + locked: { enumerable: true } +}); +setFunctionName(ReadableStream.from, 'from'); +setFunctionName(ReadableStream.prototype.cancel, 'cancel'); +setFunctionName(ReadableStream.prototype.getReader, 'getReader'); +setFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough'); +setFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo'); +setFunctionName(ReadableStream.prototype.tee, 'tee'); +setFunctionName(ReadableStream.prototype.values, 'values'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, { + value: 'ReadableStream', + configurable: true + }); +} +Object.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, { + value: ReadableStream.prototype.values, + writable: true, + configurable: true +}); +// Abstract operations for the ReadableStream. +// Throws if and only if startAlgorithm throws. +function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableStreamDefaultController.prototype); + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + return stream; +} +// Throws if and only if startAlgorithm throws. +function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableByteStreamController.prototype); + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined); + return stream; +} +function InitializeReadableStream(stream) { + stream._state = 'readable'; + stream._reader = undefined; + stream._storedError = undefined; + stream._disturbed = false; +} +function IsReadableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) { + return false; + } + return x instanceof ReadableStream; +} +function IsReadableStreamLocked(stream) { + if (stream._reader === undefined) { + return false; + } + return true; +} +// ReadableStream API exposed for controllers. +function ReadableStreamCancel(stream, reason) { + stream._disturbed = true; + if (stream._state === 'closed') { + return promiseResolvedWith(undefined); + } + if (stream._state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + ReadableStreamClose(stream); + const reader = stream._reader; + if (reader !== undefined && IsReadableStreamBYOBReader(reader)) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._closeSteps(undefined); + }); + } + const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason); + return transformPromiseWith(sourceCancelPromise, noop); +} +function ReadableStreamClose(stream) { + stream._state = 'closed'; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseResolve(reader); + if (IsReadableStreamDefaultReader(reader)) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._closeSteps(); + }); + } +} +function ReadableStreamError(stream, e) { + stream._state = 'errored'; + stream._storedError = e; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseReject(reader, e); + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + else { + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } +} +// Helper functions for the ReadableStream. +function streamBrandCheckException$1(name) { + return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`); +} + +function convertQueuingStrategyInit(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit'); + return { + highWaterMark: convertUnrestrictedDouble(highWaterMark) + }; +} + +// The size function must not have a prototype property nor be a constructor +const byteLengthSizeFunction = (chunk) => { + return chunk.byteLength; +}; +setFunctionName(byteLengthSizeFunction, 'size'); +/** + * A queuing strategy that counts the number of bytes in each chunk. + * + * @public + */ +class ByteLengthQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('highWaterMark'); + } + return this._byteLengthQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by returning the value of its `byteLength` property. + */ + get size() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('size'); + } + return byteLengthSizeFunction; + } +} +Object.defineProperties(ByteLengthQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'ByteLengthQueuingStrategy', + configurable: true + }); +} +// Helper functions for the ByteLengthQueuingStrategy. +function byteLengthBrandCheckException(name) { + return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`); +} +function IsByteLengthQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof ByteLengthQueuingStrategy; +} + +// The size function must not have a prototype property nor be a constructor +const countSizeFunction = () => { + return 1; +}; +setFunctionName(countSizeFunction, 'size'); +/** + * A queuing strategy that counts the number of chunks. + * + * @public + */ +class CountQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'CountQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._countQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('highWaterMark'); + } + return this._countQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by always returning 1. + * This ensures that the total queue size is a count of the number of chunks in the queue. + */ + get size() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('size'); + } + return countSizeFunction; + } +} +Object.defineProperties(CountQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'CountQueuingStrategy', + configurable: true + }); +} +// Helper functions for the CountQueuingStrategy. +function countBrandCheckException(name) { + return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`); +} +function IsCountQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof CountQueuingStrategy; +} + +function convertTransformer(original, context) { + assertDictionary(original, context); + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const flush = original === null || original === void 0 ? void 0 : original.flush; + const readableType = original === null || original === void 0 ? void 0 : original.readableType; + const start = original === null || original === void 0 ? void 0 : original.start; + const transform = original === null || original === void 0 ? void 0 : original.transform; + const writableType = original === null || original === void 0 ? void 0 : original.writableType; + return { + cancel: cancel === undefined ? + undefined : + convertTransformerCancelCallback(cancel, original, `${context} has member 'cancel' that`), + flush: flush === undefined ? + undefined : + convertTransformerFlushCallback(flush, original, `${context} has member 'flush' that`), + readableType, + start: start === undefined ? + undefined : + convertTransformerStartCallback(start, original, `${context} has member 'start' that`), + transform: transform === undefined ? + undefined : + convertTransformerTransformCallback(transform, original, `${context} has member 'transform' that`), + writableType + }; +} +function convertTransformerFlushCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); +} +function convertTransformerStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); +} +function convertTransformerTransformCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); +} +function convertTransformerCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); +} + +// Class TransformStream +/** + * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream}, + * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side. + * In a manner specific to the transform stream in question, writes to the writable side result in new data being + * made available for reading from the readable side. + * + * @public + */ +class TransformStream { + constructor(rawTransformer = {}, rawWritableStrategy = {}, rawReadableStrategy = {}) { + if (rawTransformer === undefined) { + rawTransformer = null; + } + const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter'); + const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter'); + const transformer = convertTransformer(rawTransformer, 'First parameter'); + if (transformer.readableType !== undefined) { + throw new RangeError('Invalid readableType specified'); + } + if (transformer.writableType !== undefined) { + throw new RangeError('Invalid writableType specified'); + } + const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0); + const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy); + const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1); + const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy); + let startPromise_resolve; + const startPromise = newPromise(resolve => { + startPromise_resolve = resolve; + }); + InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + SetUpTransformStreamDefaultControllerFromTransformer(this, transformer); + if (transformer.start !== undefined) { + startPromise_resolve(transformer.start(this._transformStreamController)); + } + else { + startPromise_resolve(undefined); + } + } + /** + * The readable side of the transform stream. + */ + get readable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('readable'); + } + return this._readable; + } + /** + * The writable side of the transform stream. + */ + get writable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('writable'); + } + return this._writable; + } +} +Object.defineProperties(TransformStream.prototype, { + readable: { enumerable: true }, + writable: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, { + value: 'TransformStream', + configurable: true + }); +} +function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) { + function startAlgorithm() { + return startPromise; + } + function writeAlgorithm(chunk) { + return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk); + } + function abortAlgorithm(reason) { + return TransformStreamDefaultSinkAbortAlgorithm(stream, reason); + } + function closeAlgorithm() { + return TransformStreamDefaultSinkCloseAlgorithm(stream); + } + stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm); + function pullAlgorithm() { + return TransformStreamDefaultSourcePullAlgorithm(stream); + } + function cancelAlgorithm(reason) { + return TransformStreamDefaultSourceCancelAlgorithm(stream, reason); + } + stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure. + stream._backpressure = undefined; + stream._backpressureChangePromise = undefined; + stream._backpressureChangePromise_resolve = undefined; + TransformStreamSetBackpressure(stream, true); + stream._transformStreamController = undefined; +} +function IsTransformStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) { + return false; + } + return x instanceof TransformStream; +} +// This is a no-op if both sides are already errored. +function TransformStreamError(stream, e) { + ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e); + TransformStreamErrorWritableAndUnblockWrite(stream, e); +} +function TransformStreamErrorWritableAndUnblockWrite(stream, e) { + TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController); + WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e); + TransformStreamUnblockWrite(stream); +} +function TransformStreamUnblockWrite(stream) { + if (stream._backpressure) { + // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure() + // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time + // _backpressure is set. + TransformStreamSetBackpressure(stream, false); + } +} +function TransformStreamSetBackpressure(stream, backpressure) { + // Passes also when called during construction. + if (stream._backpressureChangePromise !== undefined) { + stream._backpressureChangePromise_resolve(); + } + stream._backpressureChangePromise = newPromise(resolve => { + stream._backpressureChangePromise_resolve = resolve; + }); + stream._backpressure = backpressure; +} +// Class TransformStreamDefaultController +/** + * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}. + * + * @public + */ +class TransformStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full. + */ + get desiredSize() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('desiredSize'); + } + const readableController = this._controlledTransformStream._readable._readableStreamController; + return ReadableStreamDefaultControllerGetDesiredSize(readableController); + } + enqueue(chunk = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('enqueue'); + } + TransformStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors both the readable side and the writable side of the controlled transform stream, making all future + * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded. + */ + error(reason = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('error'); + } + TransformStreamDefaultControllerError(this, reason); + } + /** + * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the + * transformer only needs to consume a portion of the chunks written to the writable side. + */ + terminate() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('terminate'); + } + TransformStreamDefaultControllerTerminate(this); + } +} +Object.defineProperties(TransformStreamDefaultController.prototype, { + enqueue: { enumerable: true }, + error: { enumerable: true }, + terminate: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue'); +setFunctionName(TransformStreamDefaultController.prototype.error, 'error'); +setFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'TransformStreamDefaultController', + configurable: true + }); +} +// Transform Stream Default Controller Abstract Operations +function IsTransformStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) { + return false; + } + return x instanceof TransformStreamDefaultController; +} +function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm) { + controller._controlledTransformStream = stream; + stream._transformStreamController = controller; + controller._transformAlgorithm = transformAlgorithm; + controller._flushAlgorithm = flushAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._finishPromise = undefined; + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) { + const controller = Object.create(TransformStreamDefaultController.prototype); + let transformAlgorithm; + let flushAlgorithm; + let cancelAlgorithm; + if (transformer.transform !== undefined) { + transformAlgorithm = chunk => transformer.transform(chunk, controller); + } + else { + transformAlgorithm = chunk => { + try { + TransformStreamDefaultControllerEnqueue(controller, chunk); + return promiseResolvedWith(undefined); + } + catch (transformResultE) { + return promiseRejectedWith(transformResultE); + } + }; + } + if (transformer.flush !== undefined) { + flushAlgorithm = () => transformer.flush(controller); + } + else { + flushAlgorithm = () => promiseResolvedWith(undefined); + } + if (transformer.cancel !== undefined) { + cancelAlgorithm = reason => transformer.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm); +} +function TransformStreamDefaultControllerClearAlgorithms(controller) { + controller._transformAlgorithm = undefined; + controller._flushAlgorithm = undefined; + controller._cancelAlgorithm = undefined; +} +function TransformStreamDefaultControllerEnqueue(controller, chunk) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) { + throw new TypeError('Readable side is not in a state that permits enqueue'); + } + // We throttle transform invocations based on the backpressure of the ReadableStream, but we still + // accept TransformStreamDefaultControllerEnqueue() calls. + try { + ReadableStreamDefaultControllerEnqueue(readableController, chunk); + } + catch (e) { + // This happens when readableStrategy.size() throws. + TransformStreamErrorWritableAndUnblockWrite(stream, e); + throw stream._readable._storedError; + } + const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController); + if (backpressure !== stream._backpressure) { + TransformStreamSetBackpressure(stream, true); + } +} +function TransformStreamDefaultControllerError(controller, e) { + TransformStreamError(controller._controlledTransformStream, e); +} +function TransformStreamDefaultControllerPerformTransform(controller, chunk) { + const transformPromise = controller._transformAlgorithm(chunk); + return transformPromiseWith(transformPromise, undefined, r => { + TransformStreamError(controller._controlledTransformStream, r); + throw r; + }); +} +function TransformStreamDefaultControllerTerminate(controller) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + ReadableStreamDefaultControllerClose(readableController); + const error = new TypeError('TransformStream terminated'); + TransformStreamErrorWritableAndUnblockWrite(stream, error); +} +// TransformStreamDefaultSink Algorithms +function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) { + const controller = stream._transformStreamController; + if (stream._backpressure) { + const backpressureChangePromise = stream._backpressureChangePromise; + return transformPromiseWith(backpressureChangePromise, () => { + const writable = stream._writable; + const state = writable._state; + if (state === 'erroring') { + throw writable._storedError; + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + }); + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); +} +function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally, + // we don't run the _cancelAlgorithm again. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerError(readable._readableStreamController, reason); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +function TransformStreamDefaultSinkCloseAlgorithm(stream) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally, + // we don't also run the _cancelAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const flushPromise = controller._flushAlgorithm(); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(flushPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerClose(readable._readableStreamController); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +// TransformStreamDefaultSource Algorithms +function TransformStreamDefaultSourcePullAlgorithm(stream) { + // Invariant. Enforced by the promises returned by start() and pull(). + TransformStreamSetBackpressure(stream, false); + // Prevent the next pull() call until there is backpressure. + return stream._backpressureChangePromise; +} +function TransformStreamDefaultSourceCancelAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._writable cannot change after construction, so caching it across a call to user code is safe. + const writable = stream._writable; + // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or + // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the + // _flushAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (writable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, writable._storedError); + } + else { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +// Helper functions for the TransformStreamDefaultController. +function defaultControllerBrandCheckException(name) { + return new TypeError(`TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`); +} +function defaultControllerFinishPromiseResolve(controller) { + if (controller._finishPromise_resolve === undefined) { + return; + } + controller._finishPromise_resolve(); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +function defaultControllerFinishPromiseReject(controller, reason) { + if (controller._finishPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(controller._finishPromise); + controller._finishPromise_reject(reason); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +// Helper functions for the TransformStream. +function streamBrandCheckException(name) { + return new TypeError(`TransformStream.prototype.${name} can only be used on a TransformStream`); +} + +export { ByteLengthQueuingStrategy, CountQueuingStrategy, ReadableByteStreamController, ReadableStream, ReadableStreamBYOBReader, ReadableStreamBYOBRequest, ReadableStreamDefaultController, ReadableStreamDefaultReader, TransformStream, TransformStreamDefaultController, WritableStream, WritableStreamDefaultController, WritableStreamDefaultWriter }; +//# sourceMappingURL=ponyfill.es2018.mjs.map diff --git a/node_modules/web-streams-polyfill/dist/ponyfill.es2018.mjs.map b/node_modules/web-streams-polyfill/dist/ponyfill.es2018.mjs.map new file mode 100644 index 00000000..0a16b7c4 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/ponyfill.es2018.mjs.map @@ -0,0 +1 @@ +{"version":3,"file":"ponyfill.es2018.mjs","sources":["../src/utils.ts","../src/lib/helpers/miscellaneous.ts","../src/lib/helpers/webidl.ts","../src/lib/simple-queue.ts","../src/lib/abstract-ops/internal-methods.ts","../src/lib/readable-stream/generic-reader.ts","../src/stub/number-isfinite.ts","../src/stub/math-trunc.ts","../src/lib/validators/basic.ts","../src/lib/validators/readable-stream.ts","../src/lib/readable-stream/default-reader.ts","../src/target/es2018/stub/async-iterator-prototype.ts","../src/lib/readable-stream/async-iterator.ts","../src/stub/number-isnan.ts","../src/lib/abstract-ops/ecmascript.ts","../src/lib/abstract-ops/miscellaneous.ts","../src/lib/abstract-ops/queue-with-sizes.ts","../src/lib/helpers/array-buffer-view.ts","../src/lib/readable-stream/byte-stream-controller.ts","../src/lib/validators/reader-options.ts","../src/lib/readable-stream/byob-reader.ts","../src/lib/abstract-ops/queuing-strategy.ts","../src/lib/validators/queuing-strategy.ts","../src/lib/validators/underlying-sink.ts","../src/lib/validators/writable-stream.ts","../src/lib/abort-signal.ts","../src/lib/writable-stream.ts","../src/globals.ts","../src/stub/dom-exception.ts","../src/lib/readable-stream/pipe.ts","../src/lib/readable-stream/default-controller.ts","../src/lib/readable-stream/tee.ts","../src/lib/readable-stream/readable-stream-like.ts","../src/lib/readable-stream/from.ts","../src/lib/validators/underlying-source.ts","../src/lib/validators/iterator-options.ts","../src/lib/validators/pipe-options.ts","../src/lib/validators/readable-writable-pair.ts","../src/lib/readable-stream.ts","../src/lib/validators/queuing-strategy-init.ts","../src/lib/byte-length-queuing-strategy.ts","../src/lib/count-queuing-strategy.ts","../src/lib/validators/transformer.ts","../src/lib/transform-stream.ts"],"sourcesContent":["export function noop(): undefined {\n return undefined;\n}\n","import { noop } from '../../utils';\nimport { AssertionError } from '../../stub/assert';\n\nexport function typeIsObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport const rethrowAssertionErrorRejection: (e: any) => void =\n DEBUG ? e => {\n // Used throughout the reference implementation, as `.catch(rethrowAssertionErrorRejection)`, to ensure any errors\n // get shown. There are places in the spec where we do promise transformations and purposefully ignore or don't\n // expect any errors, but assertion errors are always problematic.\n if (e && e instanceof AssertionError) {\n setTimeout(() => {\n throw e;\n }, 0);\n }\n } : noop;\n\nexport function setFunctionName(fn: Function, name: string): void {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n } catch {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n}\n","import { rethrowAssertionErrorRejection } from './miscellaneous';\nimport assert from '../../stub/assert';\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\n\n// https://webidl.spec.whatwg.org/#a-new-promise\nexport function newPromise(executor: (\n resolve: (value: T | PromiseLike) => void,\n reject: (reason?: any) => void\n) => void): Promise {\n return new originalPromise(executor);\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-resolved-with\nexport function promiseResolvedWith(value: T | PromiseLike): Promise {\n return newPromise(resolve => resolve(value));\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-rejected-with\nexport function promiseRejectedWith(reason: any): Promise {\n return originalPromiseReject(reason);\n}\n\nexport function PerformPromiseThen(\n promise: Promise,\n onFulfilled?: (value: T) => TResult1 | PromiseLike,\n onRejected?: (reason: any) => TResult2 | PromiseLike): Promise {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected) as Promise;\n}\n\n// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n// from that handler. To prevent this, return null instead of void from all handlers.\n// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\nexport function uponPromise(\n promise: Promise,\n onFulfilled?: (value: T) => null | PromiseLike,\n onRejected?: (reason: any) => null | PromiseLike): void {\n PerformPromiseThen(\n PerformPromiseThen(promise, onFulfilled, onRejected),\n undefined,\n rethrowAssertionErrorRejection\n );\n}\n\nexport function uponFulfillment(promise: Promise, onFulfilled: (value: T) => null | PromiseLike): void {\n uponPromise(promise, onFulfilled);\n}\n\nexport function uponRejection(promise: Promise, onRejected: (reason: any) => null | PromiseLike): void {\n uponPromise(promise, undefined, onRejected);\n}\n\nexport function transformPromiseWith(\n promise: Promise,\n fulfillmentHandler?: (value: T) => TResult1 | PromiseLike,\n rejectionHandler?: (reason: any) => TResult2 | PromiseLike): Promise {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\n\nexport function setPromiseIsHandledToTrue(promise: Promise): void {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\nlet _queueMicrotask: (callback: () => void) => void = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n } else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n};\n\nexport { _queueMicrotask as queueMicrotask };\n\nexport function reflectCall(F: (this: T, ...fnArgs: A) => R, V: T, args: A): R {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n}\n\nexport function promiseCall(F: (this: T, ...fnArgs: A) => R | PromiseLike,\n V: T,\n args: A): Promise {\n assert(typeof F === 'function');\n assert(V !== undefined);\n assert(Array.isArray(args));\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n } catch (value) {\n return promiseRejectedWith(value);\n }\n}\n","import assert from '../stub/assert';\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n\ninterface Node {\n _elements: T[];\n _next: Node | undefined;\n}\n\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nexport class SimpleQueue {\n private _front: Node;\n private _back: Node;\n private _cursor = 0;\n private _size = 0;\n\n constructor() {\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n\n get length(): number {\n return this._size;\n }\n\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element: T): void {\n const oldBack = this._back;\n let newBack = oldBack;\n assert(oldBack._next === undefined);\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n assert(elements.length === QUEUE_MAX_ARRAY_SIZE);\n assert(oldFront._next !== undefined);\n newFront = oldFront._next!;\n newCursor = 0;\n }\n\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined!;\n\n return element;\n }\n\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback: (element: T) => void): void {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n assert(node._next !== undefined);\n assert(i === QUEUE_MAX_ARRAY_SIZE);\n node = node._next!;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n}\n","export const AbortSteps = Symbol('[[AbortSteps]]');\nexport const ErrorSteps = Symbol('[[ErrorSteps]]');\nexport const CancelSteps = Symbol('[[CancelSteps]]');\nexport const PullSteps = Symbol('[[PullSteps]]');\nexport const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n","import assert from '../../stub/assert';\nimport { ReadableStream, ReadableStreamCancel, type ReadableStreamReader } from '../readable-stream';\nimport { newPromise, setPromiseIsHandledToTrue } from '../helpers/webidl';\nimport { ReleaseSteps } from '../abstract-ops/internal-methods';\n\nexport function ReadableStreamReaderGenericInitialize(reader: ReadableStreamReader, stream: ReadableStream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n } else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n } else {\n assert(stream._state === 'errored');\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n}\n\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\n\nexport function ReadableStreamReaderGenericCancel(reader: ReadableStreamReader, reason: any): Promise {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n return ReadableStreamCancel(stream, reason);\n}\n\nexport function ReadableStreamReaderGenericRelease(reader: ReadableStreamReader) {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n assert(stream._reader === reader);\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n } else {\n defaultReaderClosedPromiseResetToRejected(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n\n stream._readableStreamController[ReleaseSteps]();\n\n stream._reader = undefined;\n reader._ownerReadableStream = undefined!;\n}\n\n// Helper functions for the readers.\n\nexport function readerLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nexport function defaultReaderClosedPromiseInitialize(reader: ReadableStreamReader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n}\n\nexport function defaultReaderClosedPromiseInitializeAsRejected(reader: ReadableStreamReader, reason: any) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseInitializeAsResolved(reader: ReadableStreamReader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n}\n\nexport function defaultReaderClosedPromiseReject(reader: ReadableStreamReader, reason: any) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n\nexport function defaultReaderClosedPromiseResetToRejected(reader: ReadableStreamReader, reason: any) {\n assert(reader._closedPromise_resolve === undefined);\n assert(reader._closedPromise_reject === undefined);\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseResolve(reader: ReadableStreamReader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite: typeof Number.isFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n};\n\nexport default NumberIsFinite;\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc: typeof Math.trunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\nexport default MathTrunc;\n","import NumberIsFinite from '../../stub/number-isfinite';\nimport MathTrunc from '../../stub/math-trunc';\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nexport function isDictionary(x: any): x is object | null {\n return typeof x === 'object' || typeof x === 'function';\n}\n\nexport function assertDictionary(obj: unknown,\n context: string): asserts obj is object | null | undefined {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport type AnyFunction = (...args: any[]) => any;\n\n// https://heycam.github.io/webidl/#idl-callback-functions\nexport function assertFunction(x: unknown, context: string): asserts x is AnyFunction {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-object\nexport function isObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport function assertObject(x: unknown,\n context: string): asserts x is object {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport function assertRequiredArgument(x: T | undefined,\n position: number,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n}\n\nexport function assertRequiredField(x: T | undefined,\n field: string,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nexport function convertUnrestrictedDouble(value: unknown): number {\n return Number(value);\n}\n\nfunction censorNegativeZero(x: number): number {\n return x === 0 ? 0 : x;\n}\n\nfunction integerPart(x: number): number {\n return censorNegativeZero(MathTrunc(x));\n}\n\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nexport function convertUnsignedLongLongWithEnforceRange(value: unknown, context: string): number {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n\n let x = Number(value);\n x = censorNegativeZero(x);\n\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n\n x = integerPart(x);\n\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n\n return x;\n}\n","import { IsReadableStream, ReadableStream } from '../readable-stream';\n\nexport function assertReadableStream(x: unknown, context: string): asserts x is ReadableStream {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, ReadableStream } from '../readable-stream';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { PullSteps } from '../abstract-ops/internal-methods';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\n\n/**\n * A result returned by {@link ReadableStreamDefaultReader.read}.\n *\n * @public\n */\nexport type ReadableStreamDefaultReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value?: undefined;\n}\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamDefaultReader(stream: ReadableStream): ReadableStreamDefaultReader {\n return new ReadableStreamDefaultReader(stream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadRequest(stream: ReadableStream,\n readRequest: ReadRequest): void {\n assert(IsReadableStreamDefaultReader(stream._reader));\n assert(stream._state === 'readable');\n\n (stream._reader! as ReadableStreamDefaultReader)._readRequests.push(readRequest);\n}\n\nexport function ReadableStreamFulfillReadRequest(stream: ReadableStream, chunk: R | undefined, done: boolean) {\n const reader = stream._reader as ReadableStreamDefaultReader;\n\n assert(reader._readRequests.length > 0);\n\n const readRequest = reader._readRequests.shift()!;\n if (done) {\n readRequest._closeSteps();\n } else {\n readRequest._chunkSteps(chunk!);\n }\n}\n\nexport function ReadableStreamGetNumReadRequests(stream: ReadableStream): number {\n return (stream._reader as ReadableStreamDefaultReader)._readRequests.length;\n}\n\nexport function ReadableStreamHasDefaultReader(stream: ReadableStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadRequest {\n _chunkSteps(chunk: R): void;\n\n _closeSteps(): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamDefaultReader {\n /** @internal */\n _ownerReadableStream!: ReadableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(): Promise> {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamDefaultReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamDefaultReader(x: any): x is ReadableStreamDefaultReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultReader;\n}\n\nexport function ReadableStreamDefaultReaderRead(reader: ReadableStreamDefaultReader,\n readRequest: ReadRequest): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n } else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n } else {\n assert(stream._state === 'readable');\n stream._readableStreamController[PullSteps](readRequest as ReadRequest);\n }\n}\n\nexport function ReadableStreamDefaultReaderRelease(reader: ReadableStreamDefaultReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n}\n\nexport function ReadableStreamDefaultReaderErrorReadRequests(reader: ReadableStreamDefaultReader, e: any) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nfunction defaultReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n","/// \n\n/* eslint-disable @typescript-eslint/no-empty-function */\nexport const AsyncIteratorPrototype: AsyncIterable =\n Object.getPrototypeOf(Object.getPrototypeOf(async function* (): AsyncIterableIterator {}).prototype);\n","/// \n\nimport { ReadableStream } from '../readable-stream';\nimport {\n AcquireReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadableStreamDefaultReadResult,\n type ReadRequest\n} from './default-reader';\nimport { ReadableStreamReaderGenericCancel, ReadableStreamReaderGenericRelease } from './generic-reader';\nimport assert from '../../stub/assert';\nimport { AsyncIteratorPrototype } from '@@target/stub/async-iterator-prototype';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n queueMicrotask,\n transformPromiseWith\n} from '../helpers/webidl';\n\n/**\n * An async iterator returned by {@link ReadableStream.values}.\n *\n * @public\n */\nexport interface ReadableStreamAsyncIterator extends AsyncIterableIterator {\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nexport class ReadableStreamAsyncIteratorImpl {\n private readonly _reader: ReadableStreamDefaultReader;\n private readonly _preventCancel: boolean;\n private _ongoingPromise: Promise> | undefined = undefined;\n private _isFinished = false;\n\n constructor(reader: ReadableStreamDefaultReader, preventCancel: boolean) {\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n\n next(): Promise> {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n\n return(value: any): Promise> {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n\n private _nextSteps(): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n\n private _returnSteps(value: any): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n assert(reader._readRequests.length === 0);\n\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n}\n\ninterface ReadableStreamAsyncIteratorInstance extends ReadableStreamAsyncIterator {\n /** @interal */\n _asyncIteratorImpl: ReadableStreamAsyncIteratorImpl;\n\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nconst ReadableStreamAsyncIteratorPrototype: ReadableStreamAsyncIteratorInstance = {\n next(this: ReadableStreamAsyncIteratorInstance): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n\n return(this: ReadableStreamAsyncIteratorInstance, value: any): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n} as any;\nObject.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamAsyncIterator(stream: ReadableStream,\n preventCancel: boolean): ReadableStreamAsyncIterator {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator: ReadableStreamAsyncIteratorInstance = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n}\n\nfunction IsReadableStreamAsyncIterator(x: any): x is ReadableStreamAsyncIterator {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n\n try {\n // noinspection SuspiciousTypeOfGuard\n return (x as ReadableStreamAsyncIteratorInstance)._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n } catch {\n return false;\n }\n}\n\n// Helper functions for the ReadableStream.\n\nfunction streamAsyncIteratorBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN: typeof Number.isNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n};\n\nexport default NumberIsNaN;\n","import { reflectCall } from 'lib/helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport assert from '../../stub/assert';\n\ndeclare global {\n interface ArrayBuffer {\n readonly detached: boolean;\n\n transfer(): ArrayBuffer;\n }\n\n function structuredClone(value: T, options: { transfer: ArrayBuffer[] }): T;\n}\n\nexport function CreateArrayFromList(elements: T): T {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice() as T;\n}\n\nexport function CopyDataBlockBytes(dest: ArrayBuffer,\n destOffset: number,\n src: ArrayBuffer,\n srcOffset: number,\n n: number) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n\nexport let TransferArrayBuffer = (O: ArrayBuffer): ArrayBuffer => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n } else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n } else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n};\n\nexport function CanTransferArrayBuffer(O: ArrayBuffer): boolean {\n return !IsDetachedBuffer(O);\n}\n\nexport let IsDetachedBuffer = (O: ArrayBuffer): boolean => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n } else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n};\n\nexport function ArrayBufferSlice(buffer: ArrayBuffer, begin: number, end: number): ArrayBuffer {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n}\n\nexport type MethodName = {\n [P in keyof T]: T[P] extends Function | undefined ? P : never;\n}[keyof T];\n\nexport function GetMethod>(receiver: T, prop: K): T[K] | undefined {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n}\n\nexport interface SyncIteratorRecord {\n iterator: Iterator,\n nextMethod: Iterator['next'],\n done: boolean;\n}\n\nexport interface AsyncIteratorRecord {\n iterator: AsyncIterator,\n nextMethod: AsyncIterator['next'],\n done: boolean;\n}\n\nexport type SyncOrAsyncIteratorRecord = SyncIteratorRecord | AsyncIteratorRecord;\n\nexport function CreateAsyncFromSyncIterator(syncIteratorRecord: SyncIteratorRecord): AsyncIteratorRecord {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n}\n\n// Aligns with core-js/modules/es.symbol.async-iterator.js\nexport const SymbolAsyncIterator: (typeof Symbol)['asyncIterator'] =\n Symbol.asyncIterator ??\n Symbol.for?.('Symbol.asyncIterator') ??\n '@@asyncIterator';\n\nexport type SyncOrAsyncIterable = Iterable | AsyncIterable;\nexport type SyncOrAsyncIteratorMethod = () => (Iterator | AsyncIterator);\n\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint: 'async',\n method?: SyncOrAsyncIteratorMethod\n): AsyncIteratorRecord;\nfunction GetIterator(\n obj: Iterable,\n hint: 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncIteratorRecord;\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint = 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncOrAsyncIteratorRecord {\n assert(hint === 'sync' || hint === 'async');\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj as AsyncIterable, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj as Iterable, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj as Iterable, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n } else {\n method = GetMethod(obj as Iterable, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false } as SyncOrAsyncIteratorRecord;\n}\n\nexport { GetIterator };\n\nexport function IteratorNext(iteratorRecord: AsyncIteratorRecord): Promise> {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n}\n\nexport function IteratorComplete(\n iterResult: IteratorResult\n): iterResult is IteratorReturnResult {\n assert(typeIsObject(iterResult));\n return Boolean(iterResult.done);\n}\n\nexport function IteratorValue(iterResult: IteratorYieldResult): T {\n assert(typeIsObject(iterResult));\n return iterResult.value;\n}\n","import NumberIsNaN from '../../stub/number-isnan';\nimport { ArrayBufferSlice } from './ecmascript';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function IsNonNegativeNumber(v: number): boolean {\n if (typeof v !== 'number') {\n return false;\n }\n\n if (NumberIsNaN(v)) {\n return false;\n }\n\n if (v < 0) {\n return false;\n }\n\n return true;\n}\n\nexport function CloneAsUint8Array(O: NonShared): NonShared {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer) as NonShared;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsNonNegativeNumber } from './miscellaneous';\n\nexport interface QueueContainer {\n _queue: SimpleQueue;\n _queueTotalSize: number;\n}\n\nexport interface QueuePair {\n value: T;\n size: number;\n}\n\nexport function DequeueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.shift()!;\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n\n return pair.value;\n}\n\nexport function EnqueueValueWithSize(container: QueueContainer>, value: T, size: number) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n}\n\nexport function PeekQueueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.peek();\n return pair.value;\n}\n\nexport function ResetQueue(container: QueueContainer) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n}\n","export type TypedArray =\n | Int8Array\n | Uint8Array\n | Uint8ClampedArray\n | Int16Array\n | Uint16Array\n | Int32Array\n | Uint32Array\n | Float32Array\n | Float64Array;\n\nexport type NonShared = T & {\n buffer: ArrayBuffer;\n}\n\nexport interface ArrayBufferViewConstructor {\n new(buffer: ArrayBuffer, byteOffset: number, length?: number): T;\n\n readonly prototype: T;\n}\n\nexport interface TypedArrayConstructor extends ArrayBufferViewConstructor {\n readonly BYTES_PER_ELEMENT: number;\n}\n\nexport type DataViewConstructor = ArrayBufferViewConstructor;\n\nfunction isDataViewConstructor(ctor: Function): ctor is DataViewConstructor {\n return ctor === DataView;\n}\n\nexport function isDataView(view: ArrayBufferView): view is DataView {\n return isDataViewConstructor(view.constructor);\n}\n\nexport function arrayBufferViewElementSize(ctor: ArrayBufferViewConstructor): number {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return (ctor as unknown as TypedArrayConstructor).BYTES_PER_ELEMENT;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n IsReadableStreamDefaultReader,\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n ReadableStreamHasDefaultReader,\n type ReadRequest\n} from './default-reader';\nimport {\n ReadableStreamAddReadIntoRequest,\n ReadableStreamFulfillReadIntoRequest,\n ReadableStreamGetNumReadIntoRequests,\n ReadableStreamHasBYOBReader,\n type ReadIntoRequest\n} from './byob-reader';\nimport NumberIsInteger from '../../stub/number-isinteger';\nimport {\n IsReadableStreamLocked,\n type ReadableByteStream,\n ReadableStreamClose,\n ReadableStreamError\n} from '../readable-stream';\nimport type { ValidatedUnderlyingByteSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport {\n ArrayBufferSlice,\n CanTransferArrayBuffer,\n CopyDataBlockBytes,\n IsDetachedBuffer,\n TransferArrayBuffer\n} from '../abstract-ops/ecmascript';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\nimport { assertRequiredArgument, convertUnsignedLongLongWithEnforceRange } from '../validators/basic';\nimport {\n type ArrayBufferViewConstructor,\n arrayBufferViewElementSize,\n type NonShared,\n type TypedArrayConstructor\n} from '../helpers/array-buffer-view';\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nexport class ReadableStreamBYOBRequest {\n /** @internal */\n _associatedReadableByteStreamController!: ReadableByteStreamController;\n /** @internal */\n _view!: NonShared | null;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view(): ArrayBufferView | null {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n\n return this._view;\n }\n\n /**\n * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into\n * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer.\n *\n * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer\n * modifiable.\n */\n respond(bytesWritten: number): void;\n respond(bytesWritten: number | undefined): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(this._view!.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n\n assert(this._view!.byteLength > 0);\n assert(this._view!.buffer.byteLength > 0);\n\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n\n /**\n * Indicates to the associated readable byte stream that instead of writing into\n * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`,\n * which will be given to the consumer of the readable byte stream.\n *\n * After this method is called, `view` will be transferred and no longer modifiable.\n */\n respondWithNewView(view: ArrayBufferView): void;\n respondWithNewView(view: NonShared): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n}\n\ninterface ByteQueueElement {\n buffer: ArrayBuffer;\n byteOffset: number;\n byteLength: number;\n}\n\ntype PullIntoDescriptor = NonShared> =\n DefaultPullIntoDescriptor\n | BYOBPullIntoDescriptor;\n\ninterface DefaultPullIntoDescriptor {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: TypedArrayConstructor;\n readerType: 'default' | 'none';\n}\n\ninterface BYOBPullIntoDescriptor = NonShared> {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: ArrayBufferViewConstructor;\n readerType: 'byob' | 'none';\n}\n\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableByteStreamController {\n /** @internal */\n _controlledReadableByteStream!: ReadableByteStream;\n /** @internal */\n _queue!: SimpleQueue;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n /** @internal */\n _autoAllocateChunkSize: number | undefined;\n /** @internal */\n _byobRequest: ReadableStreamBYOBRequest | null;\n /** @internal */\n _pendingPullIntos!: SimpleQueue;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest(): ReadableStreamBYOBRequest | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n\n ReadableByteStreamControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk chunk in the controlled readable stream.\n * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown.\n */\n enqueue(chunk: ArrayBufferView): void;\n enqueue(chunk: NonShared): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n\n ReadableByteStreamControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n\n ResetQueue(this);\n\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest>): void {\n const stream = this._controlledReadableByteStream;\n assert(ReadableStreamHasDefaultReader(stream));\n\n if (this._queueTotalSize > 0) {\n assert(ReadableStreamGetNumReadRequests(stream) === 0);\n\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer: ArrayBuffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n } catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n\n const pullIntoDescriptor: DefaultPullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n}\n\nObject.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableByteStreamController.prototype.close, 'close');\nsetFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableByteStreamController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableByteStreamController.\n\nexport function IsReadableByteStreamController(x: any): x is ReadableByteStreamController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n\n return x instanceof ReadableByteStreamController;\n}\n\nfunction IsReadableStreamBYOBRequest(x: any): x is ReadableStreamBYOBRequest {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBRequest;\n}\n\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller: ReadableByteStreamController): void {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller: ReadableByteStreamController) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n}\n\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor>(\n stream: ReadableByteStream,\n pullIntoDescriptor: PullIntoDescriptor\n) {\n assert(stream._state !== 'errored');\n assert(pullIntoDescriptor.readerType !== 'none');\n\n let done = false;\n if (stream._state === 'closed') {\n assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);\n done = true;\n }\n\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView as unknown as NonShared, done);\n } else {\n assert(pullIntoDescriptor.readerType === 'byob');\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n}\n\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor>(\n pullIntoDescriptor: PullIntoDescriptor\n): T {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n\n assert(bytesFilled <= pullIntoDescriptor.byteLength);\n assert(bytesFilled % elementSize === 0);\n\n return new pullIntoDescriptor.viewConstructor(\n pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize) as T;\n}\n\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n}\n\nfunction ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n } catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n}\n\nfunction ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.readerType === 'none');\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n firstDescriptor.buffer,\n firstDescriptor.byteOffset,\n firstDescriptor.bytesFilled\n );\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n}\n\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller: ReadableByteStreamController,\n pullIntoDescriptor: PullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize,\n pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n\n const queue = controller._queue;\n\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n } else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n\n if (!ready) {\n assert(controller._queueTotalSize === 0);\n assert(pullIntoDescriptor.bytesFilled > 0);\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n }\n\n return ready;\n}\n\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller: ReadableByteStreamController,\n size: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);\n assert(controller._byobRequest === null);\n pullIntoDescriptor.bytesFilled += size;\n}\n\nfunction ReadableByteStreamControllerHandleQueueDrain(controller: ReadableByteStreamController) {\n assert(controller._controlledReadableByteStream._state === 'readable');\n\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n } else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n}\n\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller: ReadableByteStreamController) {\n if (controller._byobRequest === null) {\n return;\n }\n\n controller._byobRequest._associatedReadableByteStreamController = undefined!;\n controller._byobRequest._view = null!;\n controller._byobRequest = null;\n}\n\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller: ReadableByteStreamController) {\n assert(!controller._closeRequested);\n\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n assert(pullIntoDescriptor.readerType !== 'none');\n\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n ReadableByteStreamControllerCommitPullIntoDescriptor(\n controller._controlledReadableByteStream,\n pullIntoDescriptor\n );\n }\n }\n}\n\nfunction ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller: ReadableByteStreamController) {\n const reader = controller._controlledReadableByteStream._reader;\n assert(IsReadableStreamDefaultReader(reader));\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n}\n\nexport function ReadableByteStreamControllerPullInto>(\n controller: ReadableByteStreamController,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = controller._controlledReadableByteStream;\n\n const ctor = view.constructor as ArrayBufferViewConstructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n\n const { byteOffset, byteLength } = view;\n\n const minimumFill = min * elementSize;\n assert(minimumFill >= elementSize && minimumFill <= byteLength);\n assert(minimumFill % elementSize === 0);\n\n let buffer: ArrayBuffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n } catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n\n const pullIntoDescriptor: BYOBPullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInClosedState(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.bytesFilled % firstDescriptor.elementSize === 0);\n\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n}\n\nfunction ReadableByteStreamControllerRespondInReadableState(controller: ReadableByteStreamController,\n bytesWritten: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n pullIntoDescriptor.buffer,\n end - remainderSize,\n remainderSize\n );\n }\n\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInternal(controller: ReadableByteStreamController, bytesWritten: number) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n assert(CanTransferArrayBuffer(firstDescriptor.buffer));\n\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n assert(bytesWritten === 0);\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n } else {\n assert(state === 'readable');\n assert(bytesWritten > 0);\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerShiftPendingPullInto(\n controller: ReadableByteStreamController\n): PullIntoDescriptor {\n assert(controller._byobRequest === null);\n const descriptor = controller._pendingPullIntos.shift()!;\n return descriptor;\n}\n\nfunction ReadableByteStreamControllerShouldCallPull(controller: ReadableByteStreamController): boolean {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return false;\n }\n\n if (controller._closeRequested) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableByteStreamControllerClearAlgorithms(controller: ReadableByteStreamController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\n\nexport function ReadableByteStreamControllerClose(controller: ReadableByteStreamController) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n\n return;\n }\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n throw e;\n }\n }\n\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n}\n\nexport function ReadableByteStreamControllerEnqueue(\n controller: ReadableByteStreamController,\n chunk: NonShared\n) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError(\n 'The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk'\n );\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n assert(controller._pendingPullIntos.length === 0);\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n } else {\n assert(controller._queue.length === 0);\n if (controller._pendingPullIntos.length > 0) {\n assert(controller._pendingPullIntos.peek().readerType === 'default');\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView as NonShared, false);\n }\n } else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n } else {\n assert(!IsReadableStreamLocked(stream));\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableByteStreamControllerError(controller: ReadableByteStreamController, e: any) {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableByteStreamControllerFillReadRequestFromQueue(\n controller: ReadableByteStreamController,\n readRequest: ReadRequest>\n) {\n assert(controller._queueTotalSize > 0);\n\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view as NonShared);\n}\n\nexport function ReadableByteStreamControllerGetBYOBRequest(\n controller: ReadableByteStreamController\n): ReadableStreamBYOBRequest | null {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer,\n firstDescriptor.byteOffset + firstDescriptor.bytesFilled,\n firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n\n const byobRequest: ReadableStreamBYOBRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view as NonShared);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n}\n\nfunction ReadableByteStreamControllerGetDesiredSize(controller: ReadableByteStreamController): number | null {\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nexport function ReadableByteStreamControllerRespond(controller: ReadableByteStreamController, bytesWritten: number) {\n assert(controller._pendingPullIntos.length > 0);\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n}\n\nexport function ReadableByteStreamControllerRespondWithNewView(controller: ReadableByteStreamController,\n view: NonShared) {\n assert(controller._pendingPullIntos.length > 0);\n assert(!IsDetachedBuffer(view.buffer));\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (view.byteLength === 0) {\n throw new TypeError(\n 'The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'\n );\n }\n }\n\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n}\n\nexport function SetUpReadableByteStreamController(stream: ReadableByteStream,\n controller: ReadableByteStreamController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n autoAllocateChunkSize: number | undefined) {\n assert(stream._readableStreamController === undefined);\n if (autoAllocateChunkSize !== undefined) {\n assert(NumberIsInteger(autoAllocateChunkSize));\n assert(autoAllocateChunkSize > 0);\n }\n\n controller._controlledReadableByteStream = stream;\n\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._byobRequest = null;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._closeRequested = false;\n controller._started = false;\n\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n\n controller._pendingPullIntos = new SimpleQueue();\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableByteStreamControllerFromUnderlyingSource(\n stream: ReadableByteStream,\n underlyingByteSource: ValidatedUnderlyingByteSource,\n highWaterMark: number\n) {\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n\n SetUpReadableByteStreamController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize\n );\n}\n\nfunction SetUpReadableStreamBYOBRequest(request: ReadableStreamBYOBRequest,\n controller: ReadableByteStreamController,\n view: NonShared) {\n assert(IsReadableByteStreamController(controller));\n assert(typeof view === 'object');\n assert(ArrayBuffer.isView(view));\n assert(!IsDetachedBuffer(view.buffer));\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n}\n\n// Helper functions for the ReadableStreamBYOBRequest.\n\nfunction byobRequestBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n}\n\n// Helper functions for the ReadableByteStreamController.\n\nfunction byteStreamControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n}\n","import { assertDictionary, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from '../readable-stream/reader-options';\n\nexport function convertReaderOptions(options: ReadableStreamGetReaderOptions | null | undefined,\n context: string): ReadableStreamGetReaderOptions {\n assertDictionary(options, context);\n const mode = options?.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n}\n\nfunction convertReadableStreamReaderMode(mode: string, context: string): 'byob' {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n}\n\nexport function convertByobReadOptions(\n options: ReadableStreamBYOBReaderReadOptions | null | undefined,\n context: string\n): ValidatedReadableStreamBYOBReaderReadOptions {\n assertDictionary(options, context);\n const min = options?.min ?? 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(\n min,\n `${context} has member 'min' that`\n )\n };\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, type ReadableByteStream, type ReadableStream } from '../readable-stream';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamController,\n ReadableByteStreamControllerPullInto\n} from './byte-stream-controller';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\nimport { IsDetachedBuffer } from '../abstract-ops/ecmascript';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from './reader-options';\nimport { convertByobReadOptions } from '../validators/reader-options';\nimport { isDataView, type NonShared, type TypedArray } from '../helpers/array-buffer-view';\n\n/**\n * A result returned by {@link ReadableStreamBYOBReader.read}.\n *\n * @public\n */\nexport type ReadableStreamBYOBReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value: T | undefined;\n};\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamBYOBReader(stream: ReadableByteStream): ReadableStreamBYOBReader {\n return new ReadableStreamBYOBReader(stream as ReadableStream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadIntoRequest>(\n stream: ReadableByteStream,\n readIntoRequest: ReadIntoRequest\n): void {\n assert(IsReadableStreamBYOBReader(stream._reader));\n assert(stream._state === 'readable' || stream._state === 'closed');\n\n (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);\n}\n\nexport function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,\n chunk: ArrayBufferView,\n done: boolean) {\n const reader = stream._reader as ReadableStreamBYOBReader;\n\n assert(reader._readIntoRequests.length > 0);\n\n const readIntoRequest = reader._readIntoRequests.shift()!;\n if (done) {\n readIntoRequest._closeSteps(chunk);\n } else {\n readIntoRequest._chunkSteps(chunk);\n }\n}\n\nexport function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {\n return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;\n}\n\nexport function ReadableStreamHasBYOBReader(stream: ReadableByteStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadIntoRequest> {\n _chunkSteps(chunk: T): void;\n\n _closeSteps(chunk: T | undefined): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamBYOBReader {\n /** @internal */\n _ownerReadableStream!: ReadableByteStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readIntoRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readIntoRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Attempts to reads bytes into view, and returns a promise resolved with the result.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(\n view: T,\n options?: ReadableStreamBYOBReaderReadOptions\n ): Promise>;\n read>(\n view: T,\n rawOptions: ReadableStreamBYOBReaderReadOptions | null | undefined = {}\n ): Promise> {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n\n let options: ValidatedReadableStreamBYOBReaderReadOptions;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > (view as unknown as TypedArray).length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n } else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamBYOBReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest: ReadIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamBYOBReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBReader;\n}\n\nexport function ReadableStreamBYOBReaderRead>(\n reader: ReadableStreamBYOBReader,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n } else {\n ReadableByteStreamControllerPullInto(\n stream._readableStreamController as ReadableByteStreamController,\n view,\n min,\n readIntoRequest\n );\n }\n}\n\nexport function ReadableStreamBYOBReaderRelease(reader: ReadableStreamBYOBReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n}\n\nexport function ReadableStreamBYOBReaderErrorReadIntoRequests(reader: ReadableStreamBYOBReader, e: any) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamBYOBReader.\n\nfunction byobReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport NumberIsNaN from '../../stub/number-isnan';\n\nexport function ExtractHighWaterMark(strategy: QueuingStrategy, defaultHWM: number): number {\n const { highWaterMark } = strategy;\n\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n\n return highWaterMark;\n}\n\nexport function ExtractSizeAlgorithm(strategy: QueuingStrategy): QueuingStrategySizeCallback {\n const { size } = strategy;\n\n if (!size) {\n return () => 1;\n }\n\n return size;\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport { assertDictionary, assertFunction, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategy(init: QueuingStrategy | null | undefined,\n context: string): QueuingStrategy {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n const size = init?.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n}\n\nfunction convertQueuingStrategySize(fn: QueuingStrategySizeCallback,\n context: string): QueuingStrategySizeCallback {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from '../writable-stream/underlying-sink';\nimport { WritableStreamDefaultController } from '../writable-stream';\n\nexport function convertUnderlyingSink(original: UnderlyingSink | null,\n context: string): ValidatedUnderlyingSink {\n assertDictionary(original, context);\n const abort = original?.abort;\n const close = original?.close;\n const start = original?.start;\n const type = original?.type;\n const write = original?.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original!, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original!, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original!, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original!, `${context} has member 'write' that`),\n type\n };\n}\n\nfunction convertUnderlyingSinkAbortCallback(\n fn: UnderlyingSinkAbortCallback,\n original: UnderlyingSink,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSinkCloseCallback(\n fn: UnderlyingSinkCloseCallback,\n original: UnderlyingSink,\n context: string\n): () => Promise {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n}\n\nfunction convertUnderlyingSinkStartCallback(\n fn: UnderlyingSinkStartCallback,\n original: UnderlyingSink,\n context: string\n): UnderlyingSinkStartCallback {\n assertFunction(fn, context);\n return (controller: WritableStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSinkWriteCallback(\n fn: UnderlyingSinkWriteCallback,\n original: UnderlyingSink,\n context: string\n): (chunk: W, controller: WritableStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: W, controller: WritableStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n","import { IsWritableStream, WritableStream } from '../writable-stream';\n\nexport function assertWritableStream(x: unknown, context: string): asserts x is WritableStream {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n}\n","/**\n * A signal object that allows you to communicate with a request and abort it if required\n * via its associated `AbortController` object.\n *\n * @remarks\n * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @public\n */\nexport interface AbortSignal {\n /**\n * Whether the request is aborted.\n */\n readonly aborted: boolean;\n\n /**\n * If aborted, returns the reason for aborting.\n */\n readonly reason?: any;\n\n /**\n * Add an event listener to be triggered when this signal becomes aborted.\n */\n addEventListener(type: 'abort', listener: () => void): void;\n\n /**\n * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}.\n */\n removeEventListener(type: 'abort', listener: () => void): void;\n}\n\nexport function isAbortSignal(value: unknown): value is AbortSignal {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof (value as AbortSignal).aborted === 'boolean';\n } catch {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n}\n\n/**\n * A controller object that allows you to abort an `AbortSignal` when desired.\n *\n * @remarks\n * This interface is compatible with the `AbortController` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @internal\n */\nexport interface AbortController {\n readonly signal: AbortSignal;\n\n abort(reason?: any): void;\n}\n\ninterface AbortControllerConstructor {\n new(): AbortController;\n}\n\nconst supportsAbortController = typeof (AbortController as any) === 'function';\n\n/**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\nexport function createAbortController(): AbortController | undefined {\n if (supportsAbortController) {\n return new (AbortController as AbortControllerConstructor)();\n }\n return undefined;\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponPromise\n} from './helpers/webidl';\nimport {\n DequeueValue,\n EnqueueValueWithSize,\n PeekQueueValue,\n type QueuePair,\n ResetQueue\n} from './abstract-ops/queue-with-sizes';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { SimpleQueue } from './simple-queue';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { AbortSteps, ErrorSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from './writable-stream/underlying-sink';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertUnderlyingSink } from './validators/underlying-sink';\nimport { assertWritableStream } from './validators/writable-stream';\nimport { type AbortController, type AbortSignal, createAbortController } from './abort-signal';\n\ntype WritableStreamState = 'writable' | 'closed' | 'erroring' | 'errored';\n\ninterface WriteOrCloseRequest {\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n}\n\ntype WriteRequest = WriteOrCloseRequest;\ntype CloseRequest = WriteOrCloseRequest;\n\ninterface PendingAbortRequest {\n _promise: Promise;\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n _reason: any;\n _wasAlreadyErroring: boolean;\n}\n\n/**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\nclass WritableStream {\n /** @internal */\n _state!: WritableStreamState;\n /** @internal */\n _storedError: any;\n /** @internal */\n _writer: WritableStreamDefaultWriter | undefined;\n /** @internal */\n _writableStreamController!: WritableStreamDefaultController;\n /** @internal */\n _writeRequests!: SimpleQueue;\n /** @internal */\n _inFlightWriteRequest: WriteRequest | undefined;\n /** @internal */\n _closeRequest: CloseRequest | undefined;\n /** @internal */\n _inFlightCloseRequest: CloseRequest | undefined;\n /** @internal */\n _pendingAbortRequest: PendingAbortRequest | undefined;\n /** @internal */\n _backpressure!: boolean;\n\n constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSink: UnderlyingSink | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n } else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n\n InitializeWritableStream(this);\n\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked(): boolean {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsWritableStreamLocked(this);\n }\n\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('abort'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n\n return WritableStreamAbort(this, reason);\n }\n\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('close'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamClose(this);\n }\n\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter(): WritableStreamDefaultWriter {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('getWriter');\n }\n\n return AcquireWritableStreamDefaultWriter(this);\n }\n}\n\nObject.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(WritableStream.prototype.abort, 'abort');\nsetFunctionName(WritableStream.prototype.close, 'close');\nsetFunctionName(WritableStream.prototype.getWriter, 'getWriter');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n}\n\nexport {\n AcquireWritableStreamDefaultWriter,\n CreateWritableStream,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamDefaultControllerErrorIfNeeded,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite,\n WritableStreamCloseQueuedOrInFlight\n};\n\nexport type {\n UnderlyingSink,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkAbortCallback\n};\n\n// Abstract operations for the WritableStream.\n\nfunction AcquireWritableStreamDefaultWriter(stream: WritableStream): WritableStreamDefaultWriter {\n return new WritableStreamDefaultWriter(stream);\n}\n\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: WritableStream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n\n const controller: WritableStreamDefaultController = Object.create(WritableStreamDefaultController.prototype);\n\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm,\n abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n}\n\nfunction InitializeWritableStream(stream: WritableStream) {\n stream._state = 'writable';\n\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n\n stream._writer = undefined;\n\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined!;\n\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n}\n\nfunction IsWritableStream(x: unknown): x is WritableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n\n return x instanceof WritableStream;\n}\n\nfunction IsWritableStreamLocked(stream: WritableStream): boolean {\n assert(IsWritableStream(stream));\n\n if (stream._writer === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamAbort(stream: WritableStream, reason: any): Promise {\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n stream._writableStreamController._abortController?.abort(reason);\n\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state as WritableStreamState;\n\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined!,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest!._promise = promise;\n\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n\n return promise;\n}\n\nfunction WritableStreamClose(stream: WritableStream): Promise {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(\n `The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n\n assert(state === 'writable' || state === 'erroring');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const promise = newPromise((resolve, reject) => {\n const closeRequest: CloseRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._closeRequest = closeRequest;\n });\n\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n\n return promise;\n}\n\n// WritableStream API exposed for controllers.\n\nfunction WritableStreamAddWriteRequest(stream: WritableStream): Promise {\n assert(IsWritableStreamLocked(stream));\n assert(stream._state === 'writable');\n\n const promise = newPromise((resolve, reject) => {\n const writeRequest: WriteRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._writeRequests.push(writeRequest);\n });\n\n return promise;\n}\n\nfunction WritableStreamDealWithRejection(stream: WritableStream, error: any) {\n const state = stream._state;\n\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n\n assert(state === 'erroring');\n WritableStreamFinishErroring(stream);\n}\n\nfunction WritableStreamStartErroring(stream: WritableStream, reason: any) {\n assert(stream._storedError === undefined);\n assert(stream._state === 'writable');\n\n const controller = stream._writableStreamController;\n assert(controller !== undefined);\n\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n}\n\nfunction WritableStreamFinishErroring(stream: WritableStream) {\n assert(stream._state === 'erroring');\n assert(!WritableStreamHasOperationMarkedInFlight(stream));\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(\n promise,\n () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n },\n (reason: any) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n}\n\nfunction WritableStreamFinishInFlightWrite(stream: WritableStream) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n}\n\nfunction WritableStreamFinishInFlightWriteWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._reject(error);\n stream._inFlightWriteRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n WritableStreamDealWithRejection(stream, error);\n}\n\nfunction WritableStreamFinishInFlightClose(stream: WritableStream) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n\n const state = stream._state;\n\n assert(state === 'writable' || state === 'erroring');\n\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n\n stream._state = 'closed';\n\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n\n assert(stream._pendingAbortRequest === undefined);\n assert(stream._storedError === undefined);\n}\n\nfunction WritableStreamFinishInFlightCloseWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._reject(error);\n stream._inFlightCloseRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n}\n\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream: WritableStream): boolean {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamHasOperationMarkedInFlight(stream: WritableStream): boolean {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamMarkCloseRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightCloseRequest === undefined);\n assert(stream._closeRequest !== undefined);\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n}\n\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightWriteRequest === undefined);\n assert(stream._writeRequests.length !== 0);\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\n\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream: WritableStream) {\n assert(stream._state === 'errored');\n if (stream._closeRequest !== undefined) {\n assert(stream._inFlightCloseRequest === undefined);\n\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n}\n\nfunction WritableStreamUpdateBackpressure(stream: WritableStream, backpressure: boolean) {\n assert(stream._state === 'writable');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n } else {\n assert(!backpressure);\n\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n\n stream._backpressure = backpressure;\n}\n\n/**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\nexport class WritableStreamDefaultWriter {\n /** @internal */\n _ownerWritableStream: WritableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _closedPromiseState!: 'pending' | 'resolved' | 'rejected';\n /** @internal */\n _readyPromise!: Promise;\n /** @internal */\n _readyPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _readyPromise_reject?: (reason: any) => void;\n /** @internal */\n _readyPromiseState!: 'pending' | 'fulfilled' | 'rejected';\n\n constructor(stream: WritableStream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n\n this._ownerWritableStream = stream;\n stream._writer = this;\n\n const state = stream._state;\n\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n } else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n } else {\n assert(state === 'errored');\n\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize(): number | null {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n\n return this._readyPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamDefaultWriterClose(this);\n }\n\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock(): void {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return;\n }\n\n assert(stream._writer !== undefined);\n\n WritableStreamDefaultWriterRelease(this);\n }\n\n /**\n * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully,\n * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return\n * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes\n * errored before the writing process is initiated.\n *\n * Note that what \"success\" means is up to the underlying sink; it might indicate simply that the chunk has been\n * accepted, and not necessarily that it is safely saved to its ultimate destination.\n */\n write(chunk: W): Promise;\n write(chunk: W = undefined!): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n});\nsetFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\nsetFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\nsetFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\nsetFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n}\n\n// Abstract operations for the WritableStreamDefaultWriter.\n\nfunction IsWritableStreamDefaultWriter(x: any): x is WritableStreamDefaultWriter {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultWriter;\n}\n\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultWriterAbort(writer: WritableStreamDefaultWriter, reason: any) {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamAbort(stream, reason);\n}\n\nfunction WritableStreamDefaultWriterClose(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamClose(stream);\n}\n\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n return WritableStreamDefaultWriterClose(writer);\n}\n\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n } else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n } else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterGetDesiredSize(writer: WritableStreamDefaultWriter): number | null {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n\n if (state === 'closed') {\n return 0;\n }\n\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\n\nfunction WritableStreamDefaultWriterRelease(writer: WritableStreamDefaultWriter) {\n const stream = writer._ownerWritableStream;\n assert(stream !== undefined);\n assert(stream._writer === writer);\n\n const releasedError = new TypeError(\n `Writer was released and can no longer be used to monitor the stream's closedness`);\n\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n\n stream._writer = undefined;\n writer._ownerWritableStream = undefined!;\n}\n\nfunction WritableStreamDefaultWriterWrite(writer: WritableStreamDefaultWriter, chunk: W): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const controller = stream._writableStreamController;\n\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable');\n\n const promise = WritableStreamAddWriteRequest(stream);\n\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n\n return promise;\n}\n\nconst closeSentinel: unique symbol = {} as any;\n\ntype QueueRecord = W | typeof closeSentinel;\n\n/**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\nexport class WritableStreamDefaultController {\n /** @internal */\n _controlledWritableStream!: WritableStream;\n /** @internal */\n _queue!: SimpleQueue>>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _abortReason: any;\n /** @internal */\n _abortController: AbortController | undefined;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _writeAlgorithm!: (chunk: W) => Promise;\n /** @internal */\n _closeAlgorithm!: () => Promise;\n /** @internal */\n _abortAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason(): any {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('abortReason');\n }\n return this._abortReason;\n }\n\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal(): AbortSignal {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e: any = undefined): void {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n\n WritableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [AbortSteps](reason: any): Promise {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations implementing interface required by the WritableStream.\n\nfunction IsWritableStreamDefaultController(x: any): x is WritableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultController;\n}\n\nfunction SetUpWritableStreamDefaultController(stream: WritableStream,\n controller: WritableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(IsWritableStream(stream));\n assert(stream._writableStreamController === undefined);\n\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(\n startPromise,\n () => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n r => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n }\n );\n}\n\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream: WritableStream,\n underlyingSink: ValidatedUnderlyingSink,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let writeAlgorithm: (chunk: W) => Promise;\n let closeAlgorithm: () => Promise;\n let abortAlgorithm: (reason: any) => Promise;\n\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write!(chunk, controller);\n } else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close!();\n } else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort!(reason);\n } else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpWritableStreamDefaultController(\n stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\nfunction WritableStreamDefaultControllerClearAlgorithms(controller: WritableStreamDefaultController) {\n controller._writeAlgorithm = undefined!;\n controller._closeAlgorithm = undefined!;\n controller._abortAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\nfunction WritableStreamDefaultControllerClose(controller: WritableStreamDefaultController) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\nfunction WritableStreamDefaultControllerGetChunkSize(controller: WritableStreamDefaultController,\n chunk: W): number {\n try {\n return controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n}\n\nfunction WritableStreamDefaultControllerGetDesiredSize(controller: WritableStreamDefaultController): number {\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nfunction WritableStreamDefaultControllerWrite(controller: WritableStreamDefaultController,\n chunk: W,\n chunkSize: number) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\n// Abstract operations for the WritableStreamDefaultController.\n\nfunction WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n if (!controller._started) {\n return;\n }\n\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n\n const state = stream._state;\n assert(state !== 'closed' && state !== 'errored');\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n\n if (controller._queue.length === 0) {\n return;\n }\n\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n } else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n}\n\nfunction WritableStreamDefaultControllerErrorIfNeeded(controller: WritableStreamDefaultController, error: any) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n}\n\nfunction WritableStreamDefaultControllerProcessClose(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkCloseRequestInFlight(stream);\n\n DequeueValue(controller);\n assert(controller._queue.length === 0);\n\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(\n sinkClosePromise,\n () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n },\n reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerProcessWrite(controller: WritableStreamDefaultController, chunk: W) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(\n sinkWritePromise,\n () => {\n WritableStreamFinishInFlightWrite(stream);\n\n const state = stream._state;\n assert(state === 'writable' || state === 'erroring');\n\n DequeueValue(controller);\n\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerGetBackpressure(controller: WritableStreamDefaultController): boolean {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n}\n\n// A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultControllerError(controller: WritableStreamDefaultController, error: any) {\n const stream = controller._controlledWritableStream;\n\n assert(stream._state === 'writable');\n\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n}\n\n// Helper functions for the WritableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n}\n\n// Helper functions for the WritableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n}\n\n\n// Helper functions for the WritableStreamDefaultWriter.\n\nfunction defaultWriterBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n}\n\nfunction defaultWriterLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n}\n\nfunction defaultWriterClosedPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n}\n\nfunction defaultWriterClosedPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n}\n\nfunction defaultWriterClosedPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n}\n\nfunction defaultWriterClosedPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._closedPromise_resolve === undefined);\n assert(writer._closedPromise_reject === undefined);\n assert(writer._closedPromiseState !== 'pending');\n\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n}\n\nfunction defaultWriterReadyPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n}\n\nfunction defaultWriterReadyPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n}\n\nfunction defaultWriterReadyPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n}\n\nfunction defaultWriterReadyPromiseReset(writer: WritableStreamDefaultWriter) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitialize(writer);\n}\n\nfunction defaultWriterReadyPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n}\n","/// \n\nfunction getGlobals(): typeof globalThis | undefined {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n } else if (typeof self !== 'undefined') {\n return self;\n } else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n}\n\nexport const globals = getGlobals();\n","/// \nimport { globals } from '../globals';\nimport { setFunctionName } from '../lib/helpers/miscellaneous';\n\ninterface DOMException extends Error {\n name: string;\n message: string;\n}\n\ntype DOMExceptionConstructor = new (message?: string, name?: string) => DOMException;\n\nfunction isDOMExceptionConstructor(ctor: unknown): ctor is DOMExceptionConstructor {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if ((ctor as DOMExceptionConstructor).name !== 'DOMException') {\n return false;\n }\n try {\n new (ctor as DOMExceptionConstructor)();\n return true;\n } catch {\n return false;\n }\n}\n\n/**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\nfunction getFromGlobal(): DOMExceptionConstructor | undefined {\n const ctor = globals?.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n}\n\n/**\n * Support:\n * - All platforms\n */\nfunction createPolyfill(): DOMExceptionConstructor {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(this: DOMException, message?: string, name?: string) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n } as any;\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-redeclare\nconst DOMException: DOMExceptionConstructor = getFromGlobal() || createPolyfill();\n\nexport { DOMException };\n","import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';\nimport { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireWritableStreamDefaultWriter,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamCloseQueuedOrInFlight,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite\n} from '../writable-stream';\nimport assert from '../../stub/assert';\nimport {\n newPromise,\n PerformPromiseThen,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponFulfillment,\n uponPromise,\n uponRejection\n} from '../helpers/webidl';\nimport { noop } from '../../utils';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\nimport { DOMException } from '../../stub/dom-exception';\n\nexport function ReadableStreamPipeTo(source: ReadableStream,\n dest: WritableStream,\n preventClose: boolean,\n preventAbort: boolean,\n preventCancel: boolean,\n signal: AbortSignal | undefined): Promise {\n assert(IsReadableStream(source));\n assert(IsWritableStream(dest));\n assert(typeof preventClose === 'boolean');\n assert(typeof preventAbort === 'boolean');\n assert(typeof preventCancel === 'boolean');\n assert(signal === undefined || isAbortSignal(signal));\n assert(!IsReadableStreamLocked(source));\n assert(!IsWritableStreamLocked(dest));\n\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n\n source._disturbed = true;\n\n let shuttingDown = false;\n\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n\n return newPromise((resolve, reject) => {\n let abortAlgorithm: () => void;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions: Array<() => Promise> = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n\n signal.addEventListener('abort', abortAlgorithm);\n }\n\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done: boolean) {\n if (done) {\n resolveLoop();\n } else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n\n next(false);\n });\n }\n\n function pipeStep(): Promise {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(\n reader,\n {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n }\n );\n });\n });\n }\n\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n } else {\n shutdown();\n }\n return null;\n });\n\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n } else {\n shutdown(true, destClosed);\n }\n }\n\n setPromiseIsHandledToTrue(pipeLoop());\n\n function waitForWritesToFinish(): Promise {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(\n currentWrite,\n () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined\n );\n }\n\n function isOrBecomesErrored(stream: ReadableStream | WritableStream,\n promise: Promise,\n action: (reason: any) => null) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n } else {\n uponRejection(promise, action);\n }\n }\n\n function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise, action: () => null) {\n if (stream._state === 'closed') {\n action();\n } else {\n uponFulfillment(promise, action);\n }\n }\n\n function shutdownWithAction(action: () => Promise, originalIsError?: boolean, originalError?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n } else {\n doTheRest();\n }\n\n function doTheRest(): null {\n uponPromise(\n action(),\n () => finalize(originalIsError, originalError),\n newError => finalize(true, newError)\n );\n return null;\n }\n }\n\n function shutdown(isError?: boolean, error?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n } else {\n finalize(isError, error);\n }\n }\n\n function finalize(isError?: boolean, error?: any): null {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n } else {\n resolve(undefined);\n }\n\n return null;\n }\n });\n}\n","import type { QueuingStrategySizeCallback } from '../queuing-strategy';\nimport assert from '../../stub/assert';\nimport { DequeueValue, EnqueueValueWithSize, type QueuePair, ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n type ReadRequest\n} from './default-reader';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsReadableStreamLocked, ReadableStream, ReadableStreamClose, ReadableStreamError } from '../readable-stream';\nimport type { ValidatedUnderlyingSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\n\n/**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableStreamDefaultController {\n /** @internal */\n _controlledReadableStream!: ReadableStream;\n /** @internal */\n _queue!: SimpleQueue>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('close');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n\n ReadableStreamDefaultControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the controlled readable stream.\n */\n enqueue(chunk: R): void;\n enqueue(chunk: R = undefined!): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n ReadableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest): void {\n const stream = this._controlledReadableStream;\n\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n } else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n\n readRequest._chunkSteps(chunk);\n } else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n // Do nothing.\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\nsetFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableStreamDefaultController.\n\nfunction IsReadableStreamDefaultController(x: any): x is ReadableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultController;\n}\n\nfunction ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController): void {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController): boolean {\n const stream = controller._controlledReadableStream;\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\n// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n\nexport function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n controller._closeRequested = true;\n\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n}\n\nexport function ReadableStreamDefaultControllerEnqueue(\n controller: ReadableStreamDefaultController,\n chunk: R\n): void {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n } else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController, e: any) {\n const stream = controller._controlledReadableStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ResetQueue(controller);\n\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableStreamDefaultControllerGetDesiredSize(\n controller: ReadableStreamDefaultController\n): number | null {\n const state = controller._controlledReadableStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\n// This is used in the implementation of TransformStream.\nexport function ReadableStreamDefaultControllerHasBackpressure(\n controller: ReadableStreamDefaultController\n): boolean {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n\n return true;\n}\n\nexport function ReadableStreamDefaultControllerCanCloseOrEnqueue(\n controller: ReadableStreamDefaultController\n): boolean {\n const state = controller._controlledReadableStream._state;\n\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n\n return false;\n}\n\nexport function SetUpReadableStreamDefaultController(stream: ReadableStream,\n controller: ReadableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(stream._readableStreamController === undefined);\n\n controller._controlledReadableStream = stream;\n\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n stream: ReadableStream,\n underlyingSource: ValidatedUnderlyingSource,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback\n) {\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// Helper functions for the ReadableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n}\n","import {\n CreateReadableByteStream,\n CreateReadableStream,\n type DefaultReadableStream,\n IsReadableStream,\n type ReadableByteStream,\n ReadableStream,\n ReadableStreamCancel,\n type ReadableStreamReader\n} from '../readable-stream';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadRequest\n} from './default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReaderRead,\n type ReadIntoRequest\n} from './byob-reader';\nimport assert from '../../stub/assert';\nimport { newPromise, promiseResolvedWith, queueMicrotask, uponRejection } from '../helpers/webidl';\nimport {\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError\n} from './default-controller';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamControllerClose,\n ReadableByteStreamControllerEnqueue,\n ReadableByteStreamControllerError,\n ReadableByteStreamControllerGetBYOBRequest,\n ReadableByteStreamControllerRespond,\n ReadableByteStreamControllerRespondWithNewView\n} from './byte-stream-controller';\nimport { CreateArrayFromList } from '../abstract-ops/ecmascript';\nimport { CloneAsUint8Array } from '../abstract-ops/miscellaneous';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function ReadableStreamTee(stream: ReadableStream,\n cloneForBranch2: boolean): [ReadableStream, ReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream as unknown as ReadableByteStream) as\n unknown as [ReadableStream, ReadableStream];\n }\n return ReadableStreamDefaultTee(stream, cloneForBranch2);\n}\n\nexport function ReadableStreamDefaultTee(\n stream: ReadableStream,\n cloneForBranch2: boolean\n): [DefaultReadableStream, DefaultReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n\n const reader = AcquireReadableStreamDefaultReader(stream);\n\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: DefaultReadableStream;\n let branch2: DefaultReadableStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function pullAlgorithm(): Promise {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm() {\n // do nothing\n }\n\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n\n uponRejection(reader._closedPromise, (r: any) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n\n return [branch1, branch2];\n}\n\nexport function ReadableByteStreamTee(stream: ReadableByteStream): [ReadableByteStream, ReadableByteStream] {\n assert(IsReadableStream(stream));\n assert(IsReadableByteStreamController(stream._readableStreamController));\n\n let reader: ReadableStreamReader> = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: ReadableByteStream;\n let branch2: ReadableByteStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function forwardReaderError(thisReader: ReadableStreamReader>) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n assert(reader._readIntoRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n\n const readRequest: ReadRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n\n function pullWithBYOBReader(view: NonShared, forBranch2: boolean) {\n if (IsReadableStreamDefaultReader>(reader)) {\n assert(reader._readRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n\n const readIntoRequest: ReadIntoRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n } else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n\n if (chunk !== undefined) {\n assert(chunk.byteLength === 0);\n\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n\n function pull1Algorithm(): Promise {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, false);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function pull2Algorithm(): Promise {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, true);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm(): void {\n return;\n }\n\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n\n forwardReaderError(reader);\n\n return [branch1, branch2];\n}\n","import { typeIsObject } from '../helpers/miscellaneous';\nimport type { ReadableStreamDefaultReadResult } from './default-reader';\n\n/**\n * A common interface for a `ReadadableStream` implementation.\n *\n * @public\n */\nexport interface ReadableStreamLike {\n readonly locked: boolean;\n\n getReader(): ReadableStreamDefaultReaderLike;\n}\n\n/**\n * A common interface for a `ReadableStreamDefaultReader` implementation.\n *\n * @public\n */\nexport interface ReadableStreamDefaultReaderLike {\n readonly closed: Promise;\n\n cancel(reason?: any): Promise;\n\n read(): Promise>;\n\n releaseLock(): void;\n}\n\nexport function isReadableStreamLike(stream: unknown): stream is ReadableStreamLike {\n return typeIsObject(stream) && typeof (stream as ReadableStreamLike).getReader !== 'undefined';\n}\n","import { CreateReadableStream, type DefaultReadableStream } from '../readable-stream';\nimport {\n isReadableStreamLike,\n type ReadableStreamDefaultReaderLike,\n type ReadableStreamLike\n} from './readable-stream-like';\nimport { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue } from './default-controller';\nimport { GetIterator, GetMethod, IteratorComplete, IteratorNext, IteratorValue } from '../abstract-ops/ecmascript';\nimport { promiseRejectedWith, promiseResolvedWith, reflectCall, transformPromiseWith } from '../helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport { noop } from '../../utils';\n\nexport function ReadableStreamFrom(\n source: Iterable | AsyncIterable | ReadableStreamLike\n): DefaultReadableStream {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n}\n\nexport function ReadableStreamFromIterable(asyncIterable: Iterable | AsyncIterable): DefaultReadableStream {\n let stream: DefaultReadableStream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n const iterator = iteratorRecord.iterator;\n let returnMethod: (typeof iterator)['return'] | undefined;\n try {\n returnMethod = GetMethod(iterator, 'return');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult: IteratorResult | Promise>;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n\nexport function ReadableStreamFromDefaultReader(\n reader: ReadableStreamDefaultReaderLike\n): DefaultReadableStream {\n let stream: DefaultReadableStream;\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let readPromise;\n try {\n readPromise = reader.read();\n } catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n } catch (e) {\n return promiseRejectedWith(e);\n }\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n","import { assertDictionary, assertFunction, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamController,\n UnderlyingByteSource,\n UnderlyingDefaultOrByteSource,\n UnderlyingDefaultOrByteSourcePullCallback,\n UnderlyingDefaultOrByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n ValidatedUnderlyingDefaultOrByteSource\n} from '../readable-stream/underlying-source';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\n\nexport function convertUnderlyingDefaultOrByteSource(\n source: UnderlyingSource | UnderlyingByteSource | null,\n context: string\n): ValidatedUnderlyingDefaultOrByteSource {\n assertDictionary(source, context);\n const original = source as (UnderlyingDefaultOrByteSource | null);\n const autoAllocateChunkSize = original?.autoAllocateChunkSize;\n const cancel = original?.cancel;\n const pull = original?.pull;\n const start = original?.start;\n const type = original?.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(\n autoAllocateChunkSize,\n `${context} has member 'autoAllocateChunkSize' that`\n ),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original!, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original!, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n}\n\nfunction convertUnderlyingSourceCancelCallback(\n fn: UnderlyingSourceCancelCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSourcePullCallback(\n fn: UnderlyingDefaultOrByteSourcePullCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (controller: ReadableStreamController) => Promise {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSourceStartCallback(\n fn: UnderlyingDefaultOrByteSourceStartCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): UnderlyingDefaultOrByteSourceStartCallback {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertReadableStreamType(type: string, context: string): 'bytes' {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n}\n","import { assertDictionary } from './basic';\nimport type {\n ReadableStreamIteratorOptions,\n ValidatedReadableStreamIteratorOptions\n} from '../readable-stream/iterator-options';\n\nexport function convertIteratorOptions(options: ReadableStreamIteratorOptions | null | undefined,\n context: string): ValidatedReadableStreamIteratorOptions {\n assertDictionary(options, context);\n const preventCancel = options?.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n}\n","import { assertDictionary } from './basic';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from '../readable-stream/pipe-options';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\n\nexport function convertPipeOptions(options: StreamPipeOptions | null | undefined,\n context: string): ValidatedStreamPipeOptions {\n assertDictionary(options, context);\n const preventAbort = options?.preventAbort;\n const preventCancel = options?.preventCancel;\n const preventClose = options?.preventClose;\n const signal = options?.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n}\n\nfunction assertAbortSignal(signal: unknown, context: string): asserts signal is AbortSignal {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n}\n","import { assertDictionary, assertRequiredField } from './basic';\nimport { ReadableStream } from '../readable-stream';\nimport { WritableStream } from '../writable-stream';\nimport { assertReadableStream } from './readable-stream';\nimport { assertWritableStream } from './writable-stream';\n\nexport function convertReadableWritablePair(\n pair: { readable: RS; writable: WS } | null | undefined,\n context: string\n): { readable: RS; writable: WS } {\n assertDictionary(pair, context);\n\n const readable = pair?.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n\n const writable = pair?.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n\n return { readable, writable };\n}\n","import assert from '../stub/assert';\nimport {\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith\n} from './helpers/webidl';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { AcquireReadableStreamAsyncIterator, type ReadableStreamAsyncIterator } from './readable-stream/async-iterator';\nimport { defaultReaderClosedPromiseReject, defaultReaderClosedPromiseResolve } from './readable-stream/generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderErrorReadRequests,\n type ReadableStreamDefaultReadResult\n} from './readable-stream/default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBReaderErrorReadIntoRequests,\n type ReadableStreamBYOBReadResult\n} from './readable-stream/byob-reader';\nimport { ReadableStreamPipeTo } from './readable-stream/pipe';\nimport { ReadableStreamTee } from './readable-stream/tee';\nimport { ReadableStreamFrom } from './readable-stream/from';\nimport { IsWritableStream, IsWritableStreamLocked, WritableStream } from './writable-stream';\nimport { SimpleQueue } from './simple-queue';\nimport {\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n SetUpReadableByteStreamController,\n SetUpReadableByteStreamControllerFromUnderlyingSource\n} from './readable-stream/byte-stream-controller';\nimport {\n ReadableStreamDefaultController,\n SetUpReadableStreamDefaultController,\n SetUpReadableStreamDefaultControllerFromUnderlyingSource\n} from './readable-stream/default-controller';\nimport type {\n UnderlyingByteSource,\n UnderlyingByteSourcePullCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceStartCallback\n} from './readable-stream/underlying-source';\nimport { noop } from '../utils';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { CreateArrayFromList, SymbolAsyncIterator } from './abstract-ops/ecmascript';\nimport { CancelSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertUnderlyingDefaultOrByteSource } from './validators/underlying-source';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions\n} from './readable-stream/reader-options';\nimport { convertReaderOptions } from './validators/reader-options';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from './readable-stream/pipe-options';\nimport type { ReadableStreamIteratorOptions } from './readable-stream/iterator-options';\nimport { convertIteratorOptions } from './validators/iterator-options';\nimport { convertPipeOptions } from './validators/pipe-options';\nimport type { ReadableWritablePair } from './readable-stream/readable-writable-pair';\nimport { convertReadableWritablePair } from './validators/readable-writable-pair';\nimport type { ReadableStreamDefaultReaderLike, ReadableStreamLike } from './readable-stream/readable-stream-like';\nimport type { NonShared } from './helpers/array-buffer-view';\n\nexport type DefaultReadableStream = ReadableStream & {\n _readableStreamController: ReadableStreamDefaultController\n};\n\nexport type ReadableByteStream = ReadableStream> & {\n _readableStreamController: ReadableByteStreamController\n};\n\ntype ReadableStreamState = 'readable' | 'closed' | 'errored';\n\n/**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\nexport class ReadableStream implements AsyncIterable {\n /** @internal */\n _state!: ReadableStreamState;\n /** @internal */\n _reader: ReadableStreamReader | undefined;\n /** @internal */\n _storedError: any;\n /** @internal */\n _disturbed!: boolean;\n /** @internal */\n _readableStreamController!: ReadableStreamDefaultController | ReadableByteStreamController;\n\n constructor(underlyingSource: UnderlyingByteSource, strategy?: { highWaterMark?: number; size?: undefined });\n constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSource: UnderlyingSource | UnderlyingByteSource | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n } else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n\n InitializeReadableStream(this);\n\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(\n this as unknown as ReadableByteStream,\n underlyingSource,\n highWaterMark\n );\n } else {\n assert(underlyingSource.type === undefined);\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n this,\n underlyingSource,\n highWaterMark,\n sizeAlgorithm\n );\n }\n }\n\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked(): boolean {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsReadableStreamLocked(this);\n }\n\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('cancel'));\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n\n return ReadableStreamCancel(this, reason);\n }\n\n /**\n * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader.\n *\n * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams,\n * i.e. streams which were constructed specifically with the ability to handle \"bring your own buffer\" reading.\n * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its\n * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise\n * control over allocation.\n */\n getReader({ mode }: { mode: 'byob' }): ReadableStreamBYOBReader;\n /**\n * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader.\n * While the stream is locked, no other reader can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to consume a stream\n * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours\n * or cancel the stream, which would interfere with your abstraction.\n */\n getReader(): ReadableStreamDefaultReader;\n getReader(\n rawOptions: ReadableStreamGetReaderOptions | null | undefined = undefined\n ): ReadableStreamDefaultReader | ReadableStreamBYOBReader {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('getReader');\n }\n\n const options = convertReaderOptions(rawOptions, 'First parameter');\n\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n\n assert(options.mode === 'byob');\n return AcquireReadableStreamBYOBReader(this as unknown as ReadableByteStream);\n }\n\n /**\n * Provides a convenient, chainable way of piping this readable stream through a transform stream\n * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream\n * into the writable side of the supplied pair, and returns the readable side for further use.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeThrough(\n transform: { readable: RS; writable: WritableStream },\n options?: StreamPipeOptions\n ): RS;\n pipeThrough(\n rawTransform: { readable: RS; writable: WritableStream } | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}\n ): RS {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n\n const promise = ReadableStreamPipeTo(\n this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n\n setPromiseIsHandledToTrue(promise);\n\n return transform.readable;\n }\n\n /**\n * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under\n * various error conditions can be customized with a number of passed options. It returns a promise that fulfills\n * when the piping process completes successfully, or rejects if any errors were encountered.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise;\n pipeTo(destination: WritableStream | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('pipeTo'));\n }\n\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(\n new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)\n );\n }\n\n let options: ValidatedStreamPipeOptions;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')\n );\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')\n );\n }\n\n return ReadableStreamPipeTo(\n this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n }\n\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee(): [ReadableStream, ReadableStream] {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('tee');\n }\n\n const branches = ReadableStreamTee(this, false);\n return CreateArrayFromList(branches);\n }\n\n /**\n * Asynchronously iterates over the chunks in the stream's internal queue.\n *\n * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader.\n * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method\n * is called, e.g. by breaking out of the loop.\n *\n * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also\n * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing\n * `true` for the `preventCancel` option.\n */\n values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n values(rawOptions: ReadableStreamIteratorOptions | null | undefined = undefined): ReadableStreamAsyncIterator {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('values');\n }\n\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n\n /**\n * {@inheritDoc ReadableStream.values}\n */\n [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n\n [SymbolAsyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator {\n // Stub implementation, overridden below\n return this.values(options);\n }\n\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream {\n return ReadableStreamFrom(asyncIterable);\n }\n}\n\nObject.defineProperties(ReadableStream, {\n from: { enumerable: true }\n});\nObject.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(ReadableStream.from, 'from');\nsetFunctionName(ReadableStream.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStream.prototype.getReader, 'getReader');\nsetFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\nsetFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\nsetFunctionName(ReadableStream.prototype.tee, 'tee');\nsetFunctionName(ReadableStream.prototype.values, 'values');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n}\nObject.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n});\n\nexport type {\n ReadableStreamAsyncIterator,\n ReadableStreamDefaultReadResult,\n ReadableStreamBYOBReadResult,\n ReadableStreamBYOBReaderReadOptions,\n UnderlyingByteSource,\n UnderlyingSource,\n UnderlyingSourceStartCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceCancelCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingByteSourcePullCallback,\n StreamPipeOptions,\n ReadableWritablePair,\n ReadableStreamIteratorOptions,\n ReadableStreamLike,\n ReadableStreamDefaultReaderLike\n};\n\n// Abstract operations for the ReadableStream.\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1\n): DefaultReadableStream {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: DefaultReadableStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n\n return stream;\n}\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableByteStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise\n): ReadableByteStream {\n const stream: ReadableByteStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n\n return stream;\n}\n\nfunction InitializeReadableStream(stream: ReadableStream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n}\n\nexport function IsReadableStream(x: unknown): x is ReadableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStream;\n}\n\nexport function IsReadableStreamDisturbed(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n return stream._disturbed;\n}\n\nexport function IsReadableStreamLocked(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n if (stream._reader === undefined) {\n return false;\n }\n\n return true;\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamCancel(stream: ReadableStream, reason: any): Promise {\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n ReadableStreamClose(stream);\n\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n}\n\nexport function ReadableStreamClose(stream: ReadableStream): void {\n assert(stream._state === 'readable');\n\n stream._state = 'closed';\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseResolve(reader);\n\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n}\n\nexport function ReadableStreamError(stream: ReadableStream, e: any): void {\n assert(IsReadableStream(stream));\n assert(stream._state === 'readable');\n\n stream._state = 'errored';\n stream._storedError = e;\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseReject(reader, e);\n\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n } else {\n assert(IsReadableStreamBYOBReader(reader));\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n}\n\n// Readers\n\nexport type ReadableStreamReader = ReadableStreamDefaultReader | ReadableStreamBYOBReader;\n\nexport {\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader\n};\n\n// Controllers\n\nexport {\n ReadableStreamDefaultController,\n ReadableStreamBYOBRequest,\n ReadableByteStreamController\n};\n\n// Helper functions for the ReadableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n}\n","import type { QueuingStrategyInit } from '../queuing-strategy';\nimport { assertDictionary, assertRequiredField, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategyInit(init: QueuingStrategyInit | null | undefined,\n context: string): QueuingStrategyInit {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst byteLengthSizeFunction = (chunk: ArrayBufferView): number => {\n return chunk.byteLength;\n};\nsetFunctionName(byteLengthSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\nexport default class ByteLengthQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _byteLengthQueuingStrategyHighWaterMark: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size(): (chunk: ArrayBufferView) => number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n}\n\nObject.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the ByteLengthQueuingStrategy.\n\nfunction byteLengthBrandCheckException(name: string): TypeError {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n}\n\nexport function IsByteLengthQueuingStrategy(x: any): x is ByteLengthQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof ByteLengthQueuingStrategy;\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst countSizeFunction = (): 1 => {\n return 1;\n};\nsetFunctionName(countSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\nexport default class CountQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _countQueuingStrategyHighWaterMark!: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size(): (chunk: any) => 1 {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n}\n\nObject.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the CountQueuingStrategy.\n\nfunction countBrandCheckException(name: string): TypeError {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n}\n\nexport function IsCountQueuingStrategy(x: any): x is CountQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof CountQueuingStrategy;\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from '../transform-stream/transformer';\nimport { TransformStreamDefaultController } from '../transform-stream';\n\nexport function convertTransformer(original: Transformer | null,\n context: string): ValidatedTransformer {\n assertDictionary(original, context);\n const cancel = original?.cancel;\n const flush = original?.flush;\n const readableType = original?.readableType;\n const start = original?.start;\n const transform = original?.transform;\n const writableType = original?.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original!, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original!, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original!, `${context} has member 'transform' that`),\n writableType\n };\n}\n\nfunction convertTransformerFlushCallback(\n fn: TransformerFlushCallback,\n original: Transformer,\n context: string\n): (controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertTransformerStartCallback(\n fn: TransformerStartCallback,\n original: Transformer,\n context: string\n): TransformerStartCallback {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertTransformerTransformCallback(\n fn: TransformerTransformCallback,\n original: Transformer,\n context: string\n): (chunk: I, controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: I, controller: TransformStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n\nfunction convertTransformerCancelCallback(\n fn: TransformerCancelCallback,\n original: Transformer,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith,\n uponPromise\n} from './helpers/webidl';\nimport { CreateReadableStream, type DefaultReadableStream, ReadableStream } from './readable-stream';\nimport {\n ReadableStreamDefaultControllerCanCloseOrEnqueue,\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError,\n ReadableStreamDefaultControllerGetDesiredSize,\n ReadableStreamDefaultControllerHasBackpressure\n} from './readable-stream/default-controller';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { CreateWritableStream, WritableStream, WritableStreamDefaultControllerErrorIfNeeded } from './writable-stream';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from './transform-stream/transformer';\nimport { convertTransformer } from './validators/transformer';\n\n// Class TransformStream\n\n/**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\nexport class TransformStream {\n /** @internal */\n _writable!: WritableStream;\n /** @internal */\n _readable!: DefaultReadableStream;\n /** @internal */\n _backpressure!: boolean;\n /** @internal */\n _backpressureChangePromise!: Promise;\n /** @internal */\n _backpressureChangePromise_resolve!: () => void;\n /** @internal */\n _transformStreamController!: TransformStreamDefaultController;\n\n constructor(\n transformer?: Transformer,\n writableStrategy?: QueuingStrategy,\n readableStrategy?: QueuingStrategy\n );\n constructor(rawTransformer: Transformer | null | undefined = {},\n rawWritableStrategy: QueuingStrategy | null | undefined = {},\n rawReadableStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(\n this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm\n );\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n } else {\n startPromise_resolve(undefined);\n }\n }\n\n /**\n * The readable side of the transform stream.\n */\n get readable(): ReadableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n\n return this._readable;\n }\n\n /**\n * The writable side of the transform stream.\n */\n get writable(): WritableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n\n return this._writable;\n }\n}\n\nObject.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n}\n\nexport type {\n Transformer,\n TransformerCancelCallback,\n TransformerStartCallback,\n TransformerFlushCallback,\n TransformerTransformCallback\n};\n\n// Transform Stream Abstract Operations\n\nexport function CreateTransformStream(startAlgorithm: () => void | PromiseLike,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n writableHighWaterMark = 1,\n writableSizeAlgorithm: QueuingStrategySizeCallback = () => 1,\n readableHighWaterMark = 0,\n readableSizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(writableHighWaterMark));\n assert(IsNonNegativeNumber(readableHighWaterMark));\n\n const stream: TransformStream = Object.create(TransformStream.prototype);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n\n const startResult = startAlgorithm();\n startPromise_resolve(startResult);\n return stream;\n}\n\nfunction InitializeTransformStream(stream: TransformStream,\n startPromise: Promise,\n writableHighWaterMark: number,\n writableSizeAlgorithm: QueuingStrategySizeCallback,\n readableHighWaterMark: number,\n readableSizeAlgorithm: QueuingStrategySizeCallback) {\n function startAlgorithm(): Promise {\n return startPromise;\n }\n\n function writeAlgorithm(chunk: I): Promise {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n\n function abortAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n\n function closeAlgorithm(): Promise {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm,\n writableHighWaterMark, writableSizeAlgorithm);\n\n function pullAlgorithm(): Promise {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n\n function cancelAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined!;\n stream._backpressureChangePromise = undefined!;\n stream._backpressureChangePromise_resolve = undefined!;\n TransformStreamSetBackpressure(stream, true);\n\n stream._transformStreamController = undefined!;\n}\n\nfunction IsTransformStream(x: unknown): x is TransformStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n\n return x instanceof TransformStream;\n}\n\n// This is a no-op if both sides are already errored.\nfunction TransformStreamError(stream: TransformStream, e: any) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n}\n\nfunction TransformStreamErrorWritableAndUnblockWrite(stream: TransformStream, e: any) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n}\n\nfunction TransformStreamUnblockWrite(stream: TransformStream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. 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This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate(): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n\n TransformStreamDefaultControllerTerminate(this);\n }\n}\n\nObject.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(TransformStreamDefaultController.prototype.error, 'error');\nsetFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n}\n\n// Transform Stream Default Controller Abstract Operations\n\nfunction IsTransformStreamDefaultController(x: any): x is TransformStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n\n return x instanceof TransformStreamDefaultController;\n}\n\nfunction SetUpTransformStreamDefaultController(stream: TransformStream,\n controller: TransformStreamDefaultController,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise) {\n assert(IsTransformStream(stream));\n assert(stream._transformStreamController === undefined);\n\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nfunction SetUpTransformStreamDefaultControllerFromTransformer(stream: TransformStream,\n transformer: ValidatedTransformer) {\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n let transformAlgorithm: (chunk: I) => Promise;\n let flushAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform!(chunk, controller);\n } else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk as unknown as O);\n return promiseResolvedWith(undefined);\n } catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush!(controller);\n } else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n}\n\nfunction TransformStreamDefaultControllerClearAlgorithms(controller: TransformStreamDefaultController) {\n controller._transformAlgorithm = undefined!;\n controller._flushAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\nfunction TransformStreamDefaultControllerEnqueue(controller: TransformStreamDefaultController, chunk: O) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n\n // We throttle 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transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n}\n\nfunction TransformStreamDefaultControllerTerminate(controller: TransformStreamDefaultController) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n\n ReadableStreamDefaultControllerClose(readableController);\n\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n}\n\n// TransformStreamDefaultSink Algorithms\n\nfunction TransformStreamDefaultSinkWriteAlgorithm(stream: TransformStream, chunk: I): Promise {\n assert(stream._writable._state === 'writable');\n\n const controller = stream._transformStreamController;\n\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n assert(backpressureChangePromise !== undefined);\n return 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stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// TransformStreamDefaultSource Algorithms\n\nfunction TransformStreamDefaultSourcePullAlgorithm(stream: TransformStream): Promise {\n // Invariant. 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TypeError(\n `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n}\n\nexport function defaultControllerFinishPromiseResolve(controller: TransformStreamDefaultController) {\n if (controller._finishPromise_resolve === undefined) {\n return;\n }\n\n controller._finishPromise_resolve();\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nexport function defaultControllerFinishPromiseReject(controller: TransformStreamDefaultController, reason: any) {\n if (controller._finishPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(controller._finishPromise!);\n controller._finishPromise_reject(reason);\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\n// Helper functions for the TransformStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(\n 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\ No newline at end of file diff --git a/node_modules/web-streams-polyfill/dist/ponyfill.es6.js b/node_modules/web-streams-polyfill/dist/ponyfill.es6.js new file mode 100644 index 00000000..4e4206d8 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/ponyfill.es6.js @@ -0,0 +1,4810 @@ +/** + * @license + * web-streams-polyfill v3.3.3 + * Copyright 2024 Mattias Buelens, Diwank Singh Tomer and other contributors. + * This code is released under the MIT license. + * SPDX-License-Identifier: MIT + */ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : + typeof define === 'function' && define.amd ? define(['exports'], factory) : + (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.WebStreamsPolyfill = {})); +})(this, (function (exports) { 'use strict'; + + function noop() { + return undefined; + } + + function typeIsObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; + } + const rethrowAssertionErrorRejection = noop; + function setFunctionName(fn, name) { + try { + Object.defineProperty(fn, 'name', { + value: name, + configurable: true + }); + } + catch (_a) { + // This property is non-configurable in older browsers, so ignore if this throws. + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility + } + } + + const originalPromise = Promise; + const originalPromiseThen = Promise.prototype.then; + const originalPromiseReject = Promise.reject.bind(originalPromise); + // https://webidl.spec.whatwg.org/#a-new-promise + function newPromise(executor) { + return new originalPromise(executor); + } + // https://webidl.spec.whatwg.org/#a-promise-resolved-with + function promiseResolvedWith(value) { + return newPromise(resolve => resolve(value)); + } + // https://webidl.spec.whatwg.org/#a-promise-rejected-with + function promiseRejectedWith(reason) { + return originalPromiseReject(reason); + } + function PerformPromiseThen(promise, onFulfilled, onRejected) { + // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an + // approximation. + return originalPromiseThen.call(promise, onFulfilled, onRejected); + } + // Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned + // from that handler. To prevent this, return null instead of void from all handlers. + // http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it + function uponPromise(promise, onFulfilled, onRejected) { + PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection); + } + function uponFulfillment(promise, onFulfilled) { + uponPromise(promise, onFulfilled); + } + function uponRejection(promise, onRejected) { + uponPromise(promise, undefined, onRejected); + } + function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) { + return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler); + } + function setPromiseIsHandledToTrue(promise) { + PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection); + } + let _queueMicrotask = callback => { + if (typeof queueMicrotask === 'function') { + _queueMicrotask = queueMicrotask; + } + else { + const resolvedPromise = promiseResolvedWith(undefined); + _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb); + } + return _queueMicrotask(callback); + }; + function reflectCall(F, V, args) { + if (typeof F !== 'function') { + throw new TypeError('Argument is not a function'); + } + return Function.prototype.apply.call(F, V, args); + } + function promiseCall(F, V, args) { + try { + return promiseResolvedWith(reflectCall(F, V, args)); + } + catch (value) { + return promiseRejectedWith(value); + } + } + + // Original from Chromium + // https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js + const QUEUE_MAX_ARRAY_SIZE = 16384; + /** + * Simple queue structure. + * + * Avoids scalability issues with using a packed array directly by using + * multiple arrays in a linked list and keeping the array size bounded. + */ + class SimpleQueue { + constructor() { + this._cursor = 0; + this._size = 0; + // _front and _back are always defined. + this._front = { + _elements: [], + _next: undefined + }; + this._back = this._front; + // The cursor is used to avoid calling Array.shift(). + // It contains the index of the front element of the array inside the + // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE). + this._cursor = 0; + // When there is only one node, size === elements.length - cursor. + this._size = 0; + } + get length() { + return this._size; + } + // For exception safety, this method is structured in order: + // 1. Read state + // 2. Calculate required state mutations + // 3. Perform state mutations + push(element) { + const oldBack = this._back; + let newBack = oldBack; + if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) { + newBack = { + _elements: [], + _next: undefined + }; + } + // push() is the mutation most likely to throw an exception, so it + // goes first. + oldBack._elements.push(element); + if (newBack !== oldBack) { + this._back = newBack; + oldBack._next = newBack; + } + ++this._size; + } + // Like push(), shift() follows the read -> calculate -> mutate pattern for + // exception safety. + shift() { // must not be called on an empty queue + const oldFront = this._front; + let newFront = oldFront; + const oldCursor = this._cursor; + let newCursor = oldCursor + 1; + const elements = oldFront._elements; + const element = elements[oldCursor]; + if (newCursor === QUEUE_MAX_ARRAY_SIZE) { + newFront = oldFront._next; + newCursor = 0; + } + // No mutations before this point. + --this._size; + this._cursor = newCursor; + if (oldFront !== newFront) { + this._front = newFront; + } + // Permit shifted element to be garbage collected. + elements[oldCursor] = undefined; + return element; + } + // The tricky thing about forEach() is that it can be called + // re-entrantly. The queue may be mutated inside the callback. It is easy to + // see that push() within the callback has no negative effects since the end + // of the queue is checked for on every iteration. If shift() is called + // repeatedly within the callback then the next iteration may return an + // element that has been removed. In this case the callback will be called + // with undefined values until we either "catch up" with elements that still + // exist or reach the back of the queue. + forEach(callback) { + let i = this._cursor; + let node = this._front; + let elements = node._elements; + while (i !== elements.length || node._next !== undefined) { + if (i === elements.length) { + node = node._next; + elements = node._elements; + i = 0; + if (elements.length === 0) { + break; + } + } + callback(elements[i]); + ++i; + } + } + // Return the element that would be returned if shift() was called now, + // without modifying the queue. + peek() { // must not be called on an empty queue + const front = this._front; + const cursor = this._cursor; + return front._elements[cursor]; + } + } + + const AbortSteps = Symbol('[[AbortSteps]]'); + const ErrorSteps = Symbol('[[ErrorSteps]]'); + const CancelSteps = Symbol('[[CancelSteps]]'); + const PullSteps = Symbol('[[PullSteps]]'); + const ReleaseSteps = Symbol('[[ReleaseSteps]]'); + + function ReadableStreamReaderGenericInitialize(reader, stream) { + reader._ownerReadableStream = stream; + stream._reader = reader; + if (stream._state === 'readable') { + defaultReaderClosedPromiseInitialize(reader); + } + else if (stream._state === 'closed') { + defaultReaderClosedPromiseInitializeAsResolved(reader); + } + else { + defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError); + } + } + // A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state + // check. + function ReadableStreamReaderGenericCancel(reader, reason) { + const stream = reader._ownerReadableStream; + return ReadableStreamCancel(stream, reason); + } + function ReadableStreamReaderGenericRelease(reader) { + const stream = reader._ownerReadableStream; + if (stream._state === 'readable') { + defaultReaderClosedPromiseReject(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + else { + defaultReaderClosedPromiseResetToRejected(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + stream._readableStreamController[ReleaseSteps](); + stream._reader = undefined; + reader._ownerReadableStream = undefined; + } + // Helper functions for the readers. + function readerLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released reader'); + } + // Helper functions for the ReadableStreamDefaultReader. + function defaultReaderClosedPromiseInitialize(reader) { + reader._closedPromise = newPromise((resolve, reject) => { + reader._closedPromise_resolve = resolve; + reader._closedPromise_reject = reject; + }); + } + function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseReject(reader, reason); + } + function defaultReaderClosedPromiseInitializeAsResolved(reader) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseResolve(reader); + } + function defaultReaderClosedPromiseReject(reader, reason) { + if (reader._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(reader._closedPromise); + reader._closedPromise_reject(reason); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; + } + function defaultReaderClosedPromiseResetToRejected(reader, reason) { + defaultReaderClosedPromiseInitializeAsRejected(reader, reason); + } + function defaultReaderClosedPromiseResolve(reader) { + if (reader._closedPromise_resolve === undefined) { + return; + } + reader._closedPromise_resolve(undefined); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; + } + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill + const NumberIsFinite = Number.isFinite || function (x) { + return typeof x === 'number' && isFinite(x); + }; + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill + const MathTrunc = Math.trunc || function (v) { + return v < 0 ? Math.ceil(v) : Math.floor(v); + }; + + // https://heycam.github.io/webidl/#idl-dictionaries + function isDictionary(x) { + return typeof x === 'object' || typeof x === 'function'; + } + function assertDictionary(obj, context) { + if (obj !== undefined && !isDictionary(obj)) { + throw new TypeError(`${context} is not an object.`); + } + } + // https://heycam.github.io/webidl/#idl-callback-functions + function assertFunction(x, context) { + if (typeof x !== 'function') { + throw new TypeError(`${context} is not a function.`); + } + } + // https://heycam.github.io/webidl/#idl-object + function isObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; + } + function assertObject(x, context) { + if (!isObject(x)) { + throw new TypeError(`${context} is not an object.`); + } + } + function assertRequiredArgument(x, position, context) { + if (x === undefined) { + throw new TypeError(`Parameter ${position} is required in '${context}'.`); + } + } + function assertRequiredField(x, field, context) { + if (x === undefined) { + throw new TypeError(`${field} is required in '${context}'.`); + } + } + // https://heycam.github.io/webidl/#idl-unrestricted-double + function convertUnrestrictedDouble(value) { + return Number(value); + } + function censorNegativeZero(x) { + return x === 0 ? 0 : x; + } + function integerPart(x) { + return censorNegativeZero(MathTrunc(x)); + } + // https://heycam.github.io/webidl/#idl-unsigned-long-long + function convertUnsignedLongLongWithEnforceRange(value, context) { + const lowerBound = 0; + const upperBound = Number.MAX_SAFE_INTEGER; + let x = Number(value); + x = censorNegativeZero(x); + if (!NumberIsFinite(x)) { + throw new TypeError(`${context} is not a finite number`); + } + x = integerPart(x); + if (x < lowerBound || x > upperBound) { + throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`); + } + if (!NumberIsFinite(x) || x === 0) { + return 0; + } + // TODO Use BigInt if supported? + // let xBigInt = BigInt(integerPart(x)); + // xBigInt = BigInt.asUintN(64, xBigInt); + // return Number(xBigInt); + return x; + } + + function assertReadableStream(x, context) { + if (!IsReadableStream(x)) { + throw new TypeError(`${context} is not a ReadableStream.`); + } + } + + // Abstract operations for the ReadableStream. + function AcquireReadableStreamDefaultReader(stream) { + return new ReadableStreamDefaultReader(stream); + } + // ReadableStream API exposed for controllers. + function ReadableStreamAddReadRequest(stream, readRequest) { + stream._reader._readRequests.push(readRequest); + } + function ReadableStreamFulfillReadRequest(stream, chunk, done) { + const reader = stream._reader; + const readRequest = reader._readRequests.shift(); + if (done) { + readRequest._closeSteps(); + } + else { + readRequest._chunkSteps(chunk); + } + } + function ReadableStreamGetNumReadRequests(stream) { + return stream._reader._readRequests.length; + } + function ReadableStreamHasDefaultReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamDefaultReader(reader)) { + return false; + } + return true; + } + /** + * A default reader vended by a {@link ReadableStream}. + * + * @public + */ + class ReadableStreamDefaultReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, + * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + /** + * Returns a promise that allows access to the next chunk from the stream's internal queue, if available. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + read() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('read')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: () => resolvePromise({ value: undefined, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamDefaultReaderRead(this, readRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamDefaultReader(this)) { + throw defaultReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamDefaultReaderRelease(this); + } + } + Object.defineProperties(ReadableStreamDefaultReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } + }); + setFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel'); + setFunctionName(ReadableStreamDefaultReader.prototype.read, 'read'); + setFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultReader', + configurable: true + }); + } + // Abstract operations for the readers. + function IsReadableStreamDefaultReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) { + return false; + } + return x instanceof ReadableStreamDefaultReader; + } + function ReadableStreamDefaultReaderRead(reader, readRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'closed') { + readRequest._closeSteps(); + } + else if (stream._state === 'errored') { + readRequest._errorSteps(stream._storedError); + } + else { + stream._readableStreamController[PullSteps](readRequest); + } + } + function ReadableStreamDefaultReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + function ReadableStreamDefaultReaderErrorReadRequests(reader, e) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._errorSteps(e); + }); + } + // Helper functions for the ReadableStreamDefaultReader. + function defaultReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`); + } + + /****************************************************************************** + Copyright (c) Microsoft Corporation. + + Permission to use, copy, modify, and/or distribute this software for any + purpose with or without fee is hereby granted. + + THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH + REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, + INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR + OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + PERFORMANCE OF THIS SOFTWARE. + ***************************************************************************** */ + /* global Reflect, Promise, SuppressedError, Symbol */ + + + function __values(o) { + var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0; + if (m) return m.call(o); + if (o && typeof o.length === "number") return { + next: function () { + if (o && i >= o.length) o = void 0; + return { value: o && o[i++], done: !o }; + } + }; + throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined."); + } + + function __await(v) { + return this instanceof __await ? (this.v = v, this) : new __await(v); + } + + function __asyncGenerator(thisArg, _arguments, generator) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var g = generator.apply(thisArg, _arguments || []), i, q = []; + return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i; + function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; } + function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } } + function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); } + function fulfill(value) { resume("next", value); } + function reject(value) { resume("throw", value); } + function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); } + } + + function __asyncDelegator(o) { + var i, p; + return i = {}, verb("next"), verb("throw", function (e) { throw e; }), verb("return"), i[Symbol.iterator] = function () { return this; }, i; + function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; } + } + + function __asyncValues(o) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var m = o[Symbol.asyncIterator], i; + return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i); + function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; } + function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); } + } + + typeof SuppressedError === "function" ? SuppressedError : function (error, suppressed, message) { + var e = new Error(message); + return e.name = "SuppressedError", e.error = error, e.suppressed = suppressed, e; + }; + + var _a, _b, _c; + function CreateArrayFromList(elements) { + // We use arrays to represent lists, so this is basically a no-op. + // Do a slice though just in case we happen to depend on the unique-ness. + return elements.slice(); + } + function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) { + new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset); + } + let TransferArrayBuffer = (O) => { + if (typeof O.transfer === 'function') { + TransferArrayBuffer = buffer => buffer.transfer(); + } + else if (typeof structuredClone === 'function') { + TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] }); + } + else { + // Not implemented correctly + TransferArrayBuffer = buffer => buffer; + } + return TransferArrayBuffer(O); + }; + let IsDetachedBuffer = (O) => { + if (typeof O.detached === 'boolean') { + IsDetachedBuffer = buffer => buffer.detached; + } + else { + // Not implemented correctly + IsDetachedBuffer = buffer => buffer.byteLength === 0; + } + return IsDetachedBuffer(O); + }; + function ArrayBufferSlice(buffer, begin, end) { + // ArrayBuffer.prototype.slice is not available on IE10 + // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice + if (buffer.slice) { + return buffer.slice(begin, end); + } + const length = end - begin; + const slice = new ArrayBuffer(length); + CopyDataBlockBytes(slice, 0, buffer, begin, length); + return slice; + } + function GetMethod(receiver, prop) { + const func = receiver[prop]; + if (func === undefined || func === null) { + return undefined; + } + if (typeof func !== 'function') { + throw new TypeError(`${String(prop)} is not a function`); + } + return func; + } + function CreateAsyncFromSyncIterator(syncIteratorRecord) { + // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%, + // we use yield* inside an async generator function to achieve the same result. + // Wrap the sync iterator inside a sync iterable, so we can use it with yield*. + const syncIterable = { + [Symbol.iterator]: () => syncIteratorRecord.iterator + }; + // Create an async generator function and immediately invoke it. + const asyncIterator = (function () { + return __asyncGenerator(this, arguments, function* () { + return yield __await(yield __await(yield* __asyncDelegator(__asyncValues(syncIterable)))); + }); + }()); + // Return as an async iterator record. + const nextMethod = asyncIterator.next; + return { iterator: asyncIterator, nextMethod, done: false }; + } + // Aligns with core-js/modules/es.symbol.async-iterator.js + const SymbolAsyncIterator = (_c = (_a = Symbol.asyncIterator) !== null && _a !== void 0 ? _a : (_b = Symbol.for) === null || _b === void 0 ? void 0 : _b.call(Symbol, 'Symbol.asyncIterator')) !== null && _c !== void 0 ? _c : '@@asyncIterator'; + function GetIterator(obj, hint = 'sync', method) { + if (method === undefined) { + if (hint === 'async') { + method = GetMethod(obj, SymbolAsyncIterator); + if (method === undefined) { + const syncMethod = GetMethod(obj, Symbol.iterator); + const syncIteratorRecord = GetIterator(obj, 'sync', syncMethod); + return CreateAsyncFromSyncIterator(syncIteratorRecord); + } + } + else { + method = GetMethod(obj, Symbol.iterator); + } + } + if (method === undefined) { + throw new TypeError('The object is not iterable'); + } + const iterator = reflectCall(method, obj, []); + if (!typeIsObject(iterator)) { + throw new TypeError('The iterator method must return an object'); + } + const nextMethod = iterator.next; + return { iterator, nextMethod, done: false }; + } + function IteratorNext(iteratorRecord) { + const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []); + if (!typeIsObject(result)) { + throw new TypeError('The iterator.next() method must return an object'); + } + return result; + } + function IteratorComplete(iterResult) { + return Boolean(iterResult.done); + } + function IteratorValue(iterResult) { + return iterResult.value; + } + + /// + // We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it. + const AsyncIteratorPrototype = { + // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( ) + // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator + [SymbolAsyncIterator]() { + return this; + } + }; + Object.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false }); + + /// + class ReadableStreamAsyncIteratorImpl { + constructor(reader, preventCancel) { + this._ongoingPromise = undefined; + this._isFinished = false; + this._reader = reader; + this._preventCancel = preventCancel; + } + next() { + const nextSteps = () => this._nextSteps(); + this._ongoingPromise = this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) : + nextSteps(); + return this._ongoingPromise; + } + return(value) { + const returnSteps = () => this._returnSteps(value); + return this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) : + returnSteps(); + } + _nextSteps() { + if (this._isFinished) { + return Promise.resolve({ value: undefined, done: true }); + } + const reader = this._reader; + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => { + this._ongoingPromise = undefined; + // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test. + // FIXME Is this a bug in the specification, or in the test? + _queueMicrotask(() => resolvePromise({ value: chunk, done: false })); + }, + _closeSteps: () => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + resolvePromise({ value: undefined, done: true }); + }, + _errorSteps: reason => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + rejectPromise(reason); + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promise; + } + _returnSteps(value) { + if (this._isFinished) { + return Promise.resolve({ value, done: true }); + } + this._isFinished = true; + const reader = this._reader; + if (!this._preventCancel) { + const result = ReadableStreamReaderGenericCancel(reader, value); + ReadableStreamReaderGenericRelease(reader); + return transformPromiseWith(result, () => ({ value, done: true })); + } + ReadableStreamReaderGenericRelease(reader); + return promiseResolvedWith({ value, done: true }); + } + } + const ReadableStreamAsyncIteratorPrototype = { + next() { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next')); + } + return this._asyncIteratorImpl.next(); + }, + return(value) { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return')); + } + return this._asyncIteratorImpl.return(value); + } + }; + Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype); + // Abstract operations for the ReadableStream. + function AcquireReadableStreamAsyncIterator(stream, preventCancel) { + const reader = AcquireReadableStreamDefaultReader(stream); + const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel); + const iterator = Object.create(ReadableStreamAsyncIteratorPrototype); + iterator._asyncIteratorImpl = impl; + return iterator; + } + function IsReadableStreamAsyncIterator(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) { + return false; + } + try { + // noinspection SuspiciousTypeOfGuard + return x._asyncIteratorImpl instanceof + ReadableStreamAsyncIteratorImpl; + } + catch (_a) { + return false; + } + } + // Helper functions for the ReadableStream. + function streamAsyncIteratorBrandCheckException(name) { + return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`); + } + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill + const NumberIsNaN = Number.isNaN || function (x) { + // eslint-disable-next-line no-self-compare + return x !== x; + }; + + function IsNonNegativeNumber(v) { + if (typeof v !== 'number') { + return false; + } + if (NumberIsNaN(v)) { + return false; + } + if (v < 0) { + return false; + } + return true; + } + function CloneAsUint8Array(O) { + const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength); + return new Uint8Array(buffer); + } + + function DequeueValue(container) { + const pair = container._queue.shift(); + container._queueTotalSize -= pair.size; + if (container._queueTotalSize < 0) { + container._queueTotalSize = 0; + } + return pair.value; + } + function EnqueueValueWithSize(container, value, size) { + if (!IsNonNegativeNumber(size) || size === Infinity) { + throw new RangeError('Size must be a finite, non-NaN, non-negative number.'); + } + container._queue.push({ value, size }); + container._queueTotalSize += size; + } + function PeekQueueValue(container) { + const pair = container._queue.peek(); + return pair.value; + } + function ResetQueue(container) { + container._queue = new SimpleQueue(); + container._queueTotalSize = 0; + } + + function isDataViewConstructor(ctor) { + return ctor === DataView; + } + function isDataView(view) { + return isDataViewConstructor(view.constructor); + } + function arrayBufferViewElementSize(ctor) { + if (isDataViewConstructor(ctor)) { + return 1; + } + return ctor.BYTES_PER_ELEMENT; + } + + /** + * A pull-into request in a {@link ReadableByteStreamController}. + * + * @public + */ + class ReadableStreamBYOBRequest { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the view for writing in to, or `null` if the BYOB request has already been responded to. + */ + get view() { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('view'); + } + return this._view; + } + respond(bytesWritten) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respond'); + } + assertRequiredArgument(bytesWritten, 1, 'respond'); + bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter'); + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(this._view.buffer)) { + throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`); + } + ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten); + } + respondWithNewView(view) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respondWithNewView'); + } + assertRequiredArgument(view, 1, 'respondWithNewView'); + if (!ArrayBuffer.isView(view)) { + throw new TypeError('You can only respond with array buffer views'); + } + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(view.buffer)) { + throw new TypeError('The given view\'s buffer has been detached and so cannot be used as a response'); + } + ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view); + } + } + Object.defineProperties(ReadableStreamBYOBRequest.prototype, { + respond: { enumerable: true }, + respondWithNewView: { enumerable: true }, + view: { enumerable: true } + }); + setFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond'); + setFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBRequest', + configurable: true + }); + } + /** + * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue. + * + * @public + */ + class ReadableByteStreamController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the current BYOB pull request, or `null` if there isn't one. + */ + get byobRequest() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('byobRequest'); + } + return ReadableByteStreamControllerGetBYOBRequest(this); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('desiredSize'); + } + return ReadableByteStreamControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('close'); + } + if (this._closeRequested) { + throw new TypeError('The stream has already been closed; do not close it again!'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`); + } + ReadableByteStreamControllerClose(this); + } + enqueue(chunk) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('enqueue'); + } + assertRequiredArgument(chunk, 1, 'enqueue'); + if (!ArrayBuffer.isView(chunk)) { + throw new TypeError('chunk must be an array buffer view'); + } + if (chunk.byteLength === 0) { + throw new TypeError('chunk must have non-zero byteLength'); + } + if (chunk.buffer.byteLength === 0) { + throw new TypeError(`chunk's buffer must have non-zero byteLength`); + } + if (this._closeRequested) { + throw new TypeError('stream is closed or draining'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`); + } + ReadableByteStreamControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('error'); + } + ReadableByteStreamControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ReadableByteStreamControllerClearPendingPullIntos(this); + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableByteStreamControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableByteStream; + if (this._queueTotalSize > 0) { + ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest); + return; + } + const autoAllocateChunkSize = this._autoAllocateChunkSize; + if (autoAllocateChunkSize !== undefined) { + let buffer; + try { + buffer = new ArrayBuffer(autoAllocateChunkSize); + } + catch (bufferE) { + readRequest._errorSteps(bufferE); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: autoAllocateChunkSize, + byteOffset: 0, + byteLength: autoAllocateChunkSize, + bytesFilled: 0, + minimumFill: 1, + elementSize: 1, + viewConstructor: Uint8Array, + readerType: 'default' + }; + this._pendingPullIntos.push(pullIntoDescriptor); + } + ReadableStreamAddReadRequest(stream, readRequest); + ReadableByteStreamControllerCallPullIfNeeded(this); + } + /** @internal */ + [ReleaseSteps]() { + if (this._pendingPullIntos.length > 0) { + const firstPullInto = this._pendingPullIntos.peek(); + firstPullInto.readerType = 'none'; + this._pendingPullIntos = new SimpleQueue(); + this._pendingPullIntos.push(firstPullInto); + } + } + } + Object.defineProperties(ReadableByteStreamController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + byobRequest: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(ReadableByteStreamController.prototype.close, 'close'); + setFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue'); + setFunctionName(ReadableByteStreamController.prototype.error, 'error'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, { + value: 'ReadableByteStreamController', + configurable: true + }); + } + // Abstract operations for the ReadableByteStreamController. + function IsReadableByteStreamController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) { + return false; + } + return x instanceof ReadableByteStreamController; + } + function IsReadableStreamBYOBRequest(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) { + return false; + } + return x instanceof ReadableStreamBYOBRequest; + } + function ReadableByteStreamControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableByteStreamControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + // TODO: Test controller argument + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableByteStreamControllerError(controller, e); + return null; + }); + } + function ReadableByteStreamControllerClearPendingPullIntos(controller) { + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + controller._pendingPullIntos = new SimpleQueue(); + } + function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) { + let done = false; + if (stream._state === 'closed') { + done = true; + } + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'default') { + ReadableStreamFulfillReadRequest(stream, filledView, done); + } + else { + ReadableStreamFulfillReadIntoRequest(stream, filledView, done); + } + } + function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) { + const bytesFilled = pullIntoDescriptor.bytesFilled; + const elementSize = pullIntoDescriptor.elementSize; + return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize); + } + function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) { + controller._queue.push({ buffer, byteOffset, byteLength }); + controller._queueTotalSize += byteLength; + } + function ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, buffer, byteOffset, byteLength) { + let clonedChunk; + try { + clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength); + } + catch (cloneE) { + ReadableByteStreamControllerError(controller, cloneE); + throw cloneE; + } + ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength); + } + function ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstDescriptor) { + if (firstDescriptor.bytesFilled > 0) { + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, firstDescriptor.buffer, firstDescriptor.byteOffset, firstDescriptor.bytesFilled); + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) { + const maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled); + const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy; + let totalBytesToCopyRemaining = maxBytesToCopy; + let ready = false; + const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize; + const maxAlignedBytes = maxBytesFilled - remainderBytes; + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) { + totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled; + ready = true; + } + const queue = controller._queue; + while (totalBytesToCopyRemaining > 0) { + const headOfQueue = queue.peek(); + const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength); + const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy); + if (headOfQueue.byteLength === bytesToCopy) { + queue.shift(); + } + else { + headOfQueue.byteOffset += bytesToCopy; + headOfQueue.byteLength -= bytesToCopy; + } + controller._queueTotalSize -= bytesToCopy; + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor); + totalBytesToCopyRemaining -= bytesToCopy; + } + return ready; + } + function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) { + pullIntoDescriptor.bytesFilled += size; + } + function ReadableByteStreamControllerHandleQueueDrain(controller) { + if (controller._queueTotalSize === 0 && controller._closeRequested) { + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(controller._controlledReadableByteStream); + } + else { + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + } + function ReadableByteStreamControllerInvalidateBYOBRequest(controller) { + if (controller._byobRequest === null) { + return; + } + controller._byobRequest._associatedReadableByteStreamController = undefined; + controller._byobRequest._view = null; + controller._byobRequest = null; + } + function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) { + while (controller._pendingPullIntos.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const pullIntoDescriptor = controller._pendingPullIntos.peek(); + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + } + } + } + function ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller) { + const reader = controller._controlledReadableByteStream._reader; + while (reader._readRequests.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const readRequest = reader._readRequests.shift(); + ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest); + } + } + function ReadableByteStreamControllerPullInto(controller, view, min, readIntoRequest) { + const stream = controller._controlledReadableByteStream; + const ctor = view.constructor; + const elementSize = arrayBufferViewElementSize(ctor); + const { byteOffset, byteLength } = view; + const minimumFill = min * elementSize; + let buffer; + try { + buffer = TransferArrayBuffer(view.buffer); + } + catch (e) { + readIntoRequest._errorSteps(e); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: buffer.byteLength, + byteOffset, + byteLength, + bytesFilled: 0, + minimumFill, + elementSize, + viewConstructor: ctor, + readerType: 'byob' + }; + if (controller._pendingPullIntos.length > 0) { + controller._pendingPullIntos.push(pullIntoDescriptor); + // No ReadableByteStreamControllerCallPullIfNeeded() call since: + // - No change happens on desiredSize + // - The source has already been notified of that there's at least 1 pending read(view) + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + return; + } + if (stream._state === 'closed') { + const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0); + readIntoRequest._closeSteps(emptyView); + return; + } + if (controller._queueTotalSize > 0) { + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + ReadableByteStreamControllerHandleQueueDrain(controller); + readIntoRequest._chunkSteps(filledView); + return; + } + if (controller._closeRequested) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + readIntoRequest._errorSteps(e); + return; + } + } + controller._pendingPullIntos.push(pullIntoDescriptor); + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) { + if (firstDescriptor.readerType === 'none') { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const stream = controller._controlledReadableByteStream; + if (ReadableStreamHasBYOBReader(stream)) { + while (ReadableStreamGetNumReadIntoRequests(stream) > 0) { + const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor); + } + } + } + function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) { + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + return; + } + if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) { + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + return; + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize; + if (remainderSize > 0) { + const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, pullIntoDescriptor.buffer, end - remainderSize, remainderSize); + } + pullIntoDescriptor.bytesFilled -= remainderSize; + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor); + } + else { + ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerShiftPendingPullInto(controller) { + const descriptor = controller._pendingPullIntos.shift(); + return descriptor; + } + function ReadableByteStreamControllerShouldCallPull(controller) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return false; + } + if (controller._closeRequested) { + return false; + } + if (!controller._started) { + return false; + } + if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; + } + function ReadableByteStreamControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + } + // A client of ReadableByteStreamController may use these functions directly to bypass state check. + function ReadableByteStreamControllerClose(controller) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + if (controller._queueTotalSize > 0) { + controller._closeRequested = true; + return; + } + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + throw e; + } + } + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } + function ReadableByteStreamControllerEnqueue(controller, chunk) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + const { buffer, byteOffset, byteLength } = chunk; + if (IsDetachedBuffer(buffer)) { + throw new TypeError('chunk\'s buffer is detached and so cannot be enqueued'); + } + const transferredBuffer = TransferArrayBuffer(buffer); + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (IsDetachedBuffer(firstPendingPullInto.buffer)) { + throw new TypeError('The BYOB request\'s buffer has been detached and so cannot be filled with an enqueued chunk'); + } + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer); + if (firstPendingPullInto.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto); + } + } + if (ReadableStreamHasDefaultReader(stream)) { + ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller); + if (ReadableStreamGetNumReadRequests(stream) === 0) { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + else { + if (controller._pendingPullIntos.length > 0) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength); + ReadableStreamFulfillReadRequest(stream, transferredView, false); + } + } + else if (ReadableStreamHasBYOBReader(stream)) { + // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully. + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + else { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerError(controller, e) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return; + } + ReadableByteStreamControllerClearPendingPullIntos(controller); + ResetQueue(controller); + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); + } + function ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest) { + const entry = controller._queue.shift(); + controller._queueTotalSize -= entry.byteLength; + ReadableByteStreamControllerHandleQueueDrain(controller); + const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength); + readRequest._chunkSteps(view); + } + function ReadableByteStreamControllerGetBYOBRequest(controller) { + if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled); + const byobRequest = Object.create(ReadableStreamBYOBRequest.prototype); + SetUpReadableStreamBYOBRequest(byobRequest, controller, view); + controller._byobRequest = byobRequest; + } + return controller._byobRequest; + } + function ReadableByteStreamControllerGetDesiredSize(controller) { + const state = controller._controlledReadableByteStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; + } + function ReadableByteStreamControllerRespond(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (bytesWritten !== 0) { + throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream'); + } + } + else { + if (bytesWritten === 0) { + throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream'); + } + if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) { + throw new RangeError('bytesWritten out of range'); + } + } + firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer); + ReadableByteStreamControllerRespondInternal(controller, bytesWritten); + } + function ReadableByteStreamControllerRespondWithNewView(controller, view) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (view.byteLength !== 0) { + throw new TypeError('The view\'s length must be 0 when calling respondWithNewView() on a closed stream'); + } + } + else { + if (view.byteLength === 0) { + throw new TypeError('The view\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'); + } + } + if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) { + throw new RangeError('The region specified by view does not match byobRequest'); + } + if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) { + throw new RangeError('The buffer of view has different capacity than byobRequest'); + } + if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) { + throw new RangeError('The region specified by view is larger than byobRequest'); + } + const viewByteLength = view.byteLength; + firstDescriptor.buffer = TransferArrayBuffer(view.buffer); + ReadableByteStreamControllerRespondInternal(controller, viewByteLength); + } + function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) { + controller._controlledReadableByteStream = stream; + controller._pullAgain = false; + controller._pulling = false; + controller._byobRequest = null; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._closeRequested = false; + controller._started = false; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._autoAllocateChunkSize = autoAllocateChunkSize; + controller._pendingPullIntos = new SimpleQueue(); + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableByteStreamControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableByteStreamControllerError(controller, r); + return null; + }); + } + function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) { + const controller = Object.create(ReadableByteStreamController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingByteSource.start !== undefined) { + startAlgorithm = () => underlyingByteSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingByteSource.pull !== undefined) { + pullAlgorithm = () => underlyingByteSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingByteSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingByteSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize; + if (autoAllocateChunkSize === 0) { + throw new TypeError('autoAllocateChunkSize must be greater than 0'); + } + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize); + } + function SetUpReadableStreamBYOBRequest(request, controller, view) { + request._associatedReadableByteStreamController = controller; + request._view = view; + } + // Helper functions for the ReadableStreamBYOBRequest. + function byobRequestBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`); + } + // Helper functions for the ReadableByteStreamController. + function byteStreamControllerBrandCheckException(name) { + return new TypeError(`ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`); + } + + function convertReaderOptions(options, context) { + assertDictionary(options, context); + const mode = options === null || options === void 0 ? void 0 : options.mode; + return { + mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`) + }; + } + function convertReadableStreamReaderMode(mode, context) { + mode = `${mode}`; + if (mode !== 'byob') { + throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`); + } + return mode; + } + function convertByobReadOptions(options, context) { + var _a; + assertDictionary(options, context); + const min = (_a = options === null || options === void 0 ? void 0 : options.min) !== null && _a !== void 0 ? _a : 1; + return { + min: convertUnsignedLongLongWithEnforceRange(min, `${context} has member 'min' that`) + }; + } + + // Abstract operations for the ReadableStream. + function AcquireReadableStreamBYOBReader(stream) { + return new ReadableStreamBYOBReader(stream); + } + // ReadableStream API exposed for controllers. + function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) { + stream._reader._readIntoRequests.push(readIntoRequest); + } + function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) { + const reader = stream._reader; + const readIntoRequest = reader._readIntoRequests.shift(); + if (done) { + readIntoRequest._closeSteps(chunk); + } + else { + readIntoRequest._chunkSteps(chunk); + } + } + function ReadableStreamGetNumReadIntoRequests(stream) { + return stream._reader._readIntoRequests.length; + } + function ReadableStreamHasBYOBReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamBYOBReader(reader)) { + return false; + } + return true; + } + /** + * A BYOB reader vended by a {@link ReadableStream}. + * + * @public + */ + class ReadableStreamBYOBReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + if (!IsReadableByteStreamController(stream._readableStreamController)) { + throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' + + 'source'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readIntoRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + read(view, rawOptions = {}) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('read')); + } + if (!ArrayBuffer.isView(view)) { + return promiseRejectedWith(new TypeError('view must be an array buffer view')); + } + if (view.byteLength === 0) { + return promiseRejectedWith(new TypeError('view must have non-zero byteLength')); + } + if (view.buffer.byteLength === 0) { + return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`)); + } + if (IsDetachedBuffer(view.buffer)) { + return promiseRejectedWith(new TypeError('view\'s buffer has been detached')); + } + let options; + try { + options = convertByobReadOptions(rawOptions, 'options'); + } + catch (e) { + return promiseRejectedWith(e); + } + const min = options.min; + if (min === 0) { + return promiseRejectedWith(new TypeError('options.min must be greater than 0')); + } + if (!isDataView(view)) { + if (min > view.length) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s length')); + } + } + else if (min > view.byteLength) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s byteLength')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readIntoRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: chunk => resolvePromise({ value: chunk, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamBYOBReader(this)) { + throw byobReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamBYOBReaderRelease(this); + } + } + Object.defineProperties(ReadableStreamBYOBReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } + }); + setFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel'); + setFunctionName(ReadableStreamBYOBReader.prototype.read, 'read'); + setFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBReader', + configurable: true + }); + } + // Abstract operations for the readers. + function IsReadableStreamBYOBReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) { + return false; + } + return x instanceof ReadableStreamBYOBReader; + } + function ReadableStreamBYOBReaderRead(reader, view, min, readIntoRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'errored') { + readIntoRequest._errorSteps(stream._storedError); + } + else { + ReadableByteStreamControllerPullInto(stream._readableStreamController, view, min, readIntoRequest); + } + } + function ReadableStreamBYOBReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } + function ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._errorSteps(e); + }); + } + // Helper functions for the ReadableStreamBYOBReader. + function byobReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`); + } + + function ExtractHighWaterMark(strategy, defaultHWM) { + const { highWaterMark } = strategy; + if (highWaterMark === undefined) { + return defaultHWM; + } + if (NumberIsNaN(highWaterMark) || highWaterMark < 0) { + throw new RangeError('Invalid highWaterMark'); + } + return highWaterMark; + } + function ExtractSizeAlgorithm(strategy) { + const { size } = strategy; + if (!size) { + return () => 1; + } + return size; + } + + function convertQueuingStrategy(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + const size = init === null || init === void 0 ? void 0 : init.size; + return { + highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark), + size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`) + }; + } + function convertQueuingStrategySize(fn, context) { + assertFunction(fn, context); + return chunk => convertUnrestrictedDouble(fn(chunk)); + } + + function convertUnderlyingSink(original, context) { + assertDictionary(original, context); + const abort = original === null || original === void 0 ? void 0 : original.abort; + const close = original === null || original === void 0 ? void 0 : original.close; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + const write = original === null || original === void 0 ? void 0 : original.write; + return { + abort: abort === undefined ? + undefined : + convertUnderlyingSinkAbortCallback(abort, original, `${context} has member 'abort' that`), + close: close === undefined ? + undefined : + convertUnderlyingSinkCloseCallback(close, original, `${context} has member 'close' that`), + start: start === undefined ? + undefined : + convertUnderlyingSinkStartCallback(start, original, `${context} has member 'start' that`), + write: write === undefined ? + undefined : + convertUnderlyingSinkWriteCallback(write, original, `${context} has member 'write' that`), + type + }; + } + function convertUnderlyingSinkAbortCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); + } + function convertUnderlyingSinkCloseCallback(fn, original, context) { + assertFunction(fn, context); + return () => promiseCall(fn, original, []); + } + function convertUnderlyingSinkStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); + } + function convertUnderlyingSinkWriteCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); + } + + function assertWritableStream(x, context) { + if (!IsWritableStream(x)) { + throw new TypeError(`${context} is not a WritableStream.`); + } + } + + function isAbortSignal(value) { + if (typeof value !== 'object' || value === null) { + return false; + } + try { + return typeof value.aborted === 'boolean'; + } + catch (_a) { + // AbortSignal.prototype.aborted throws if its brand check fails + return false; + } + } + const supportsAbortController = typeof AbortController === 'function'; + /** + * Construct a new AbortController, if supported by the platform. + * + * @internal + */ + function createAbortController() { + if (supportsAbortController) { + return new AbortController(); + } + return undefined; + } + + /** + * A writable stream represents a destination for data, into which you can write. + * + * @public + */ + class WritableStream { + constructor(rawUnderlyingSink = {}, rawStrategy = {}) { + if (rawUnderlyingSink === undefined) { + rawUnderlyingSink = null; + } + else { + assertObject(rawUnderlyingSink, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter'); + InitializeWritableStream(this); + const type = underlyingSink.type; + if (type !== undefined) { + throw new RangeError('Invalid type is specified'); + } + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm); + } + /** + * Returns whether or not the writable stream is locked to a writer. + */ + get locked() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('locked'); + } + return IsWritableStreamLocked(this); + } + /** + * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be + * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort + * mechanism of the underlying sink. + * + * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled + * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel + * the stream) if the stream is currently locked. + */ + abort(reason = undefined) { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('abort')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer')); + } + return WritableStreamAbort(this, reason); + } + /** + * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its + * close behavior. During this time any further attempts to write will fail (without erroring the stream). + * + * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream + * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with + * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked. + */ + close() { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('close')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer')); + } + if (WritableStreamCloseQueuedOrInFlight(this)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamClose(this); + } + /** + * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream + * is locked, no other writer can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to write to a stream + * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at + * the same time, which would cause the resulting written data to be unpredictable and probably useless. + */ + getWriter() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('getWriter'); + } + return AcquireWritableStreamDefaultWriter(this); + } + } + Object.defineProperties(WritableStream.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + getWriter: { enumerable: true }, + locked: { enumerable: true } + }); + setFunctionName(WritableStream.prototype.abort, 'abort'); + setFunctionName(WritableStream.prototype.close, 'close'); + setFunctionName(WritableStream.prototype.getWriter, 'getWriter'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, { + value: 'WritableStream', + configurable: true + }); + } + // Abstract operations for the WritableStream. + function AcquireWritableStreamDefaultWriter(stream) { + return new WritableStreamDefaultWriter(stream); + } + // Throws if and only if startAlgorithm throws. + function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(WritableStream.prototype); + InitializeWritableStream(stream); + const controller = Object.create(WritableStreamDefaultController.prototype); + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + return stream; + } + function InitializeWritableStream(stream) { + stream._state = 'writable'; + // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is + // 'erroring' or 'errored'. May be set to an undefined value. + stream._storedError = undefined; + stream._writer = undefined; + // Initialize to undefined first because the constructor of the controller checks this + // variable to validate the caller. + stream._writableStreamController = undefined; + // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data + // producer without waiting for the queued writes to finish. + stream._writeRequests = new SimpleQueue(); + // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents + // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here. + stream._inFlightWriteRequest = undefined; + // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer + // has been detached. + stream._closeRequest = undefined; + // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it + // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here. + stream._inFlightCloseRequest = undefined; + // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached. + stream._pendingAbortRequest = undefined; + // The backpressure signal set by the controller. + stream._backpressure = false; + } + function IsWritableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) { + return false; + } + return x instanceof WritableStream; + } + function IsWritableStreamLocked(stream) { + if (stream._writer === undefined) { + return false; + } + return true; + } + function WritableStreamAbort(stream, reason) { + var _a; + if (stream._state === 'closed' || stream._state === 'errored') { + return promiseResolvedWith(undefined); + } + stream._writableStreamController._abortReason = reason; + (_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort(reason); + // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring', + // but it doesn't know that signaling abort runs author code that might have changed the state. + // Widen the type again by casting to WritableStreamState. + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseResolvedWith(undefined); + } + if (stream._pendingAbortRequest !== undefined) { + return stream._pendingAbortRequest._promise; + } + let wasAlreadyErroring = false; + if (state === 'erroring') { + wasAlreadyErroring = true; + // reason will not be used, so don't keep a reference to it. + reason = undefined; + } + const promise = newPromise((resolve, reject) => { + stream._pendingAbortRequest = { + _promise: undefined, + _resolve: resolve, + _reject: reject, + _reason: reason, + _wasAlreadyErroring: wasAlreadyErroring + }; + }); + stream._pendingAbortRequest._promise = promise; + if (!wasAlreadyErroring) { + WritableStreamStartErroring(stream, reason); + } + return promise; + } + function WritableStreamClose(stream) { + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseRejectedWith(new TypeError(`The stream (in ${state} state) is not in the writable state and cannot be closed`)); + } + const promise = newPromise((resolve, reject) => { + const closeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._closeRequest = closeRequest; + }); + const writer = stream._writer; + if (writer !== undefined && stream._backpressure && state === 'writable') { + defaultWriterReadyPromiseResolve(writer); + } + WritableStreamDefaultControllerClose(stream._writableStreamController); + return promise; + } + // WritableStream API exposed for controllers. + function WritableStreamAddWriteRequest(stream) { + const promise = newPromise((resolve, reject) => { + const writeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._writeRequests.push(writeRequest); + }); + return promise; + } + function WritableStreamDealWithRejection(stream, error) { + const state = stream._state; + if (state === 'writable') { + WritableStreamStartErroring(stream, error); + return; + } + WritableStreamFinishErroring(stream); + } + function WritableStreamStartErroring(stream, reason) { + const controller = stream._writableStreamController; + stream._state = 'erroring'; + stream._storedError = reason; + const writer = stream._writer; + if (writer !== undefined) { + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason); + } + if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) { + WritableStreamFinishErroring(stream); + } + } + function WritableStreamFinishErroring(stream) { + stream._state = 'errored'; + stream._writableStreamController[ErrorSteps](); + const storedError = stream._storedError; + stream._writeRequests.forEach(writeRequest => { + writeRequest._reject(storedError); + }); + stream._writeRequests = new SimpleQueue(); + if (stream._pendingAbortRequest === undefined) { + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const abortRequest = stream._pendingAbortRequest; + stream._pendingAbortRequest = undefined; + if (abortRequest._wasAlreadyErroring) { + abortRequest._reject(storedError); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const promise = stream._writableStreamController[AbortSteps](abortRequest._reason); + uponPromise(promise, () => { + abortRequest._resolve(); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }, (reason) => { + abortRequest._reject(reason); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }); + } + function WritableStreamFinishInFlightWrite(stream) { + stream._inFlightWriteRequest._resolve(undefined); + stream._inFlightWriteRequest = undefined; + } + function WritableStreamFinishInFlightWriteWithError(stream, error) { + stream._inFlightWriteRequest._reject(error); + stream._inFlightWriteRequest = undefined; + WritableStreamDealWithRejection(stream, error); + } + function WritableStreamFinishInFlightClose(stream) { + stream._inFlightCloseRequest._resolve(undefined); + stream._inFlightCloseRequest = undefined; + const state = stream._state; + if (state === 'erroring') { + // The error was too late to do anything, so it is ignored. + stream._storedError = undefined; + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._resolve(); + stream._pendingAbortRequest = undefined; + } + } + stream._state = 'closed'; + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseResolve(writer); + } + } + function WritableStreamFinishInFlightCloseWithError(stream, error) { + stream._inFlightCloseRequest._reject(error); + stream._inFlightCloseRequest = undefined; + // Never execute sink abort() after sink close(). + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._reject(error); + stream._pendingAbortRequest = undefined; + } + WritableStreamDealWithRejection(stream, error); + } + // TODO(ricea): Fix alphabetical order. + function WritableStreamCloseQueuedOrInFlight(stream) { + if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; + } + function WritableStreamHasOperationMarkedInFlight(stream) { + if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; + } + function WritableStreamMarkCloseRequestInFlight(stream) { + stream._inFlightCloseRequest = stream._closeRequest; + stream._closeRequest = undefined; + } + function WritableStreamMarkFirstWriteRequestInFlight(stream) { + stream._inFlightWriteRequest = stream._writeRequests.shift(); + } + function WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) { + if (stream._closeRequest !== undefined) { + stream._closeRequest._reject(stream._storedError); + stream._closeRequest = undefined; + } + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseReject(writer, stream._storedError); + } + } + function WritableStreamUpdateBackpressure(stream, backpressure) { + const writer = stream._writer; + if (writer !== undefined && backpressure !== stream._backpressure) { + if (backpressure) { + defaultWriterReadyPromiseReset(writer); + } + else { + defaultWriterReadyPromiseResolve(writer); + } + } + stream._backpressure = backpressure; + } + /** + * A default writer vended by a {@link WritableStream}. + * + * @public + */ + class WritableStreamDefaultWriter { + constructor(stream) { + assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter'); + assertWritableStream(stream, 'First parameter'); + if (IsWritableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive writing by another writer'); + } + this._ownerWritableStream = stream; + stream._writer = this; + const state = stream._state; + if (state === 'writable') { + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) { + defaultWriterReadyPromiseInitialize(this); + } + else { + defaultWriterReadyPromiseInitializeAsResolved(this); + } + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'erroring') { + defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError); + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'closed') { + defaultWriterReadyPromiseInitializeAsResolved(this); + defaultWriterClosedPromiseInitializeAsResolved(this); + } + else { + const storedError = stream._storedError; + defaultWriterReadyPromiseInitializeAsRejected(this, storedError); + defaultWriterClosedPromiseInitializeAsRejected(this, storedError); + } + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the writer’s lock is released before the stream finishes closing. + */ + get closed() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full. + * A producer can use this information to determine the right amount of data to write. + * + * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort + * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when + * the writer’s lock is released. + */ + get desiredSize() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('desiredSize'); + } + if (this._ownerWritableStream === undefined) { + throw defaultWriterLockException('desiredSize'); + } + return WritableStreamDefaultWriterGetDesiredSize(this); + } + /** + * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions + * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips + * back to zero or below, the getter will return a new promise that stays pending until the next transition. + * + * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become + * rejected. + */ + get ready() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('ready')); + } + return this._readyPromise; + } + /** + * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}. + */ + abort(reason = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('abort')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('abort')); + } + return WritableStreamDefaultWriterAbort(this, reason); + } + /** + * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}. + */ + close() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('close')); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return promiseRejectedWith(defaultWriterLockException('close')); + } + if (WritableStreamCloseQueuedOrInFlight(stream)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamDefaultWriterClose(this); + } + /** + * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active. + * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from + * now on; otherwise, the writer will appear closed. + * + * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the + * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled). + * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents + * other producers from writing in an interleaved manner. + */ + releaseLock() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('releaseLock'); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return; + } + WritableStreamDefaultWriterRelease(this); + } + write(chunk = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('write')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + return WritableStreamDefaultWriterWrite(this, chunk); + } + } + Object.defineProperties(WritableStreamDefaultWriter.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + releaseLock: { enumerable: true }, + write: { enumerable: true }, + closed: { enumerable: true }, + desiredSize: { enumerable: true }, + ready: { enumerable: true } + }); + setFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort'); + setFunctionName(WritableStreamDefaultWriter.prototype.close, 'close'); + setFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock'); + setFunctionName(WritableStreamDefaultWriter.prototype.write, 'write'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultWriter', + configurable: true + }); + } + // Abstract operations for the WritableStreamDefaultWriter. + function IsWritableStreamDefaultWriter(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultWriter; + } + // A client of WritableStreamDefaultWriter may use these functions directly to bypass state check. + function WritableStreamDefaultWriterAbort(writer, reason) { + const stream = writer._ownerWritableStream; + return WritableStreamAbort(stream, reason); + } + function WritableStreamDefaultWriterClose(writer) { + const stream = writer._ownerWritableStream; + return WritableStreamClose(stream); + } + function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseResolvedWith(undefined); + } + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + return WritableStreamDefaultWriterClose(writer); + } + function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) { + if (writer._closedPromiseState === 'pending') { + defaultWriterClosedPromiseReject(writer, error); + } + else { + defaultWriterClosedPromiseResetToRejected(writer, error); + } + } + function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) { + if (writer._readyPromiseState === 'pending') { + defaultWriterReadyPromiseReject(writer, error); + } + else { + defaultWriterReadyPromiseResetToRejected(writer, error); + } + } + function WritableStreamDefaultWriterGetDesiredSize(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (state === 'errored' || state === 'erroring') { + return null; + } + if (state === 'closed') { + return 0; + } + return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController); + } + function WritableStreamDefaultWriterRelease(writer) { + const stream = writer._ownerWritableStream; + const releasedError = new TypeError(`Writer was released and can no longer be used to monitor the stream's closedness`); + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError); + // The state transitions to "errored" before the sink abort() method runs, but the writer.closed promise is not + // rejected until afterwards. This means that simply testing state will not work. + WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError); + stream._writer = undefined; + writer._ownerWritableStream = undefined; + } + function WritableStreamDefaultWriterWrite(writer, chunk) { + const stream = writer._ownerWritableStream; + const controller = stream._writableStreamController; + const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk); + if (stream !== writer._ownerWritableStream) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + const state = stream._state; + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to')); + } + if (state === 'erroring') { + return promiseRejectedWith(stream._storedError); + } + const promise = WritableStreamAddWriteRequest(stream); + WritableStreamDefaultControllerWrite(controller, chunk, chunkSize); + return promise; + } + const closeSentinel = {}; + /** + * Allows control of a {@link WritableStream | writable stream}'s state and internal queue. + * + * @public + */ + class WritableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted. + * + * @deprecated + * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177. + * Use {@link WritableStreamDefaultController.signal}'s `reason` instead. + */ + get abortReason() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('abortReason'); + } + return this._abortReason; + } + /** + * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted. + */ + get signal() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('signal'); + } + if (this._abortController === undefined) { + // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`. + // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill, + // so instead we only implement support for `signal` if we find a global `AbortController` constructor. + throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported'); + } + return this._abortController.signal; + } + /** + * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`. + * + * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying + * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the + * normal lifecycle of interactions with the underlying sink. + */ + error(e = undefined) { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('error'); + } + const state = this._controlledWritableStream._state; + if (state !== 'writable') { + // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so + // just treat it as a no-op. + return; + } + WritableStreamDefaultControllerError(this, e); + } + /** @internal */ + [AbortSteps](reason) { + const result = this._abortAlgorithm(reason); + WritableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [ErrorSteps]() { + ResetQueue(this); + } + } + Object.defineProperties(WritableStreamDefaultController.prototype, { + abortReason: { enumerable: true }, + signal: { enumerable: true }, + error: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultController', + configurable: true + }); + } + // Abstract operations implementing interface required by the WritableStream. + function IsWritableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultController; + } + function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledWritableStream = stream; + stream._writableStreamController = controller; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._abortReason = undefined; + controller._abortController = createAbortController(); + controller._started = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._writeAlgorithm = writeAlgorithm; + controller._closeAlgorithm = closeAlgorithm; + controller._abortAlgorithm = abortAlgorithm; + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + const startResult = startAlgorithm(); + const startPromise = promiseResolvedWith(startResult); + uponPromise(startPromise, () => { + controller._started = true; + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, r => { + controller._started = true; + WritableStreamDealWithRejection(stream, r); + return null; + }); + } + function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) { + const controller = Object.create(WritableStreamDefaultController.prototype); + let startAlgorithm; + let writeAlgorithm; + let closeAlgorithm; + let abortAlgorithm; + if (underlyingSink.start !== undefined) { + startAlgorithm = () => underlyingSink.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSink.write !== undefined) { + writeAlgorithm = chunk => underlyingSink.write(chunk, controller); + } + else { + writeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.close !== undefined) { + closeAlgorithm = () => underlyingSink.close(); + } + else { + closeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.abort !== undefined) { + abortAlgorithm = reason => underlyingSink.abort(reason); + } + else { + abortAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + } + // ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls. + function WritableStreamDefaultControllerClearAlgorithms(controller) { + controller._writeAlgorithm = undefined; + controller._closeAlgorithm = undefined; + controller._abortAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; + } + function WritableStreamDefaultControllerClose(controller) { + EnqueueValueWithSize(controller, closeSentinel, 0); + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + } + function WritableStreamDefaultControllerGetChunkSize(controller, chunk) { + try { + return controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE); + return 1; + } + } + function WritableStreamDefaultControllerGetDesiredSize(controller) { + return controller._strategyHWM - controller._queueTotalSize; + } + function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) { + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE); + return; + } + const stream = controller._controlledWritableStream; + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + } + // Abstract operations for the WritableStreamDefaultController. + function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) { + const stream = controller._controlledWritableStream; + if (!controller._started) { + return; + } + if (stream._inFlightWriteRequest !== undefined) { + return; + } + const state = stream._state; + if (state === 'erroring') { + WritableStreamFinishErroring(stream); + return; + } + if (controller._queue.length === 0) { + return; + } + const value = PeekQueueValue(controller); + if (value === closeSentinel) { + WritableStreamDefaultControllerProcessClose(controller); + } + else { + WritableStreamDefaultControllerProcessWrite(controller, value); + } + } + function WritableStreamDefaultControllerErrorIfNeeded(controller, error) { + if (controller._controlledWritableStream._state === 'writable') { + WritableStreamDefaultControllerError(controller, error); + } + } + function WritableStreamDefaultControllerProcessClose(controller) { + const stream = controller._controlledWritableStream; + WritableStreamMarkCloseRequestInFlight(stream); + DequeueValue(controller); + const sinkClosePromise = controller._closeAlgorithm(); + WritableStreamDefaultControllerClearAlgorithms(controller); + uponPromise(sinkClosePromise, () => { + WritableStreamFinishInFlightClose(stream); + return null; + }, reason => { + WritableStreamFinishInFlightCloseWithError(stream, reason); + return null; + }); + } + function WritableStreamDefaultControllerProcessWrite(controller, chunk) { + const stream = controller._controlledWritableStream; + WritableStreamMarkFirstWriteRequestInFlight(stream); + const sinkWritePromise = controller._writeAlgorithm(chunk); + uponPromise(sinkWritePromise, () => { + WritableStreamFinishInFlightWrite(stream); + const state = stream._state; + DequeueValue(controller); + if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, reason => { + if (stream._state === 'writable') { + WritableStreamDefaultControllerClearAlgorithms(controller); + } + WritableStreamFinishInFlightWriteWithError(stream, reason); + return null; + }); + } + function WritableStreamDefaultControllerGetBackpressure(controller) { + const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller); + return desiredSize <= 0; + } + // A client of WritableStreamDefaultController may use these functions directly to bypass state check. + function WritableStreamDefaultControllerError(controller, error) { + const stream = controller._controlledWritableStream; + WritableStreamDefaultControllerClearAlgorithms(controller); + WritableStreamStartErroring(stream, error); + } + // Helper functions for the WritableStream. + function streamBrandCheckException$2(name) { + return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`); + } + // Helper functions for the WritableStreamDefaultController. + function defaultControllerBrandCheckException$2(name) { + return new TypeError(`WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`); + } + // Helper functions for the WritableStreamDefaultWriter. + function defaultWriterBrandCheckException(name) { + return new TypeError(`WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`); + } + function defaultWriterLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released writer'); + } + function defaultWriterClosedPromiseInitialize(writer) { + writer._closedPromise = newPromise((resolve, reject) => { + writer._closedPromise_resolve = resolve; + writer._closedPromise_reject = reject; + writer._closedPromiseState = 'pending'; + }); + } + function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseReject(writer, reason); + } + function defaultWriterClosedPromiseInitializeAsResolved(writer) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseResolve(writer); + } + function defaultWriterClosedPromiseReject(writer, reason) { + if (writer._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._closedPromise); + writer._closedPromise_reject(reason); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'rejected'; + } + function defaultWriterClosedPromiseResetToRejected(writer, reason) { + defaultWriterClosedPromiseInitializeAsRejected(writer, reason); + } + function defaultWriterClosedPromiseResolve(writer) { + if (writer._closedPromise_resolve === undefined) { + return; + } + writer._closedPromise_resolve(undefined); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'resolved'; + } + function defaultWriterReadyPromiseInitialize(writer) { + writer._readyPromise = newPromise((resolve, reject) => { + writer._readyPromise_resolve = resolve; + writer._readyPromise_reject = reject; + }); + writer._readyPromiseState = 'pending'; + } + function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseReject(writer, reason); + } + function defaultWriterReadyPromiseInitializeAsResolved(writer) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseResolve(writer); + } + function defaultWriterReadyPromiseReject(writer, reason) { + if (writer._readyPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._readyPromise); + writer._readyPromise_reject(reason); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'rejected'; + } + function defaultWriterReadyPromiseReset(writer) { + defaultWriterReadyPromiseInitialize(writer); + } + function defaultWriterReadyPromiseResetToRejected(writer, reason) { + defaultWriterReadyPromiseInitializeAsRejected(writer, reason); + } + function defaultWriterReadyPromiseResolve(writer) { + if (writer._readyPromise_resolve === undefined) { + return; + } + writer._readyPromise_resolve(undefined); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'fulfilled'; + } + + /// + function getGlobals() { + if (typeof globalThis !== 'undefined') { + return globalThis; + } + else if (typeof self !== 'undefined') { + return self; + } + else if (typeof global !== 'undefined') { + return global; + } + return undefined; + } + const globals = getGlobals(); + + /// + function isDOMExceptionConstructor(ctor) { + if (!(typeof ctor === 'function' || typeof ctor === 'object')) { + return false; + } + if (ctor.name !== 'DOMException') { + return false; + } + try { + new ctor(); + return true; + } + catch (_a) { + return false; + } + } + /** + * Support: + * - Web browsers + * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87) + */ + function getFromGlobal() { + const ctor = globals === null || globals === void 0 ? void 0 : globals.DOMException; + return isDOMExceptionConstructor(ctor) ? ctor : undefined; + } + /** + * Support: + * - All platforms + */ + function createPolyfill() { + // eslint-disable-next-line @typescript-eslint/no-shadow + const ctor = function DOMException(message, name) { + this.message = message || ''; + this.name = name || 'Error'; + if (Error.captureStackTrace) { + Error.captureStackTrace(this, this.constructor); + } + }; + setFunctionName(ctor, 'DOMException'); + ctor.prototype = Object.create(Error.prototype); + Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true }); + return ctor; + } + // eslint-disable-next-line @typescript-eslint/no-redeclare + const DOMException = getFromGlobal() || createPolyfill(); + + function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) { + const reader = AcquireReadableStreamDefaultReader(source); + const writer = AcquireWritableStreamDefaultWriter(dest); + source._disturbed = true; + let shuttingDown = false; + // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown. + let currentWrite = promiseResolvedWith(undefined); + return newPromise((resolve, reject) => { + let abortAlgorithm; + if (signal !== undefined) { + abortAlgorithm = () => { + const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError'); + const actions = []; + if (!preventAbort) { + actions.push(() => { + if (dest._state === 'writable') { + return WritableStreamAbort(dest, error); + } + return promiseResolvedWith(undefined); + }); + } + if (!preventCancel) { + actions.push(() => { + if (source._state === 'readable') { + return ReadableStreamCancel(source, error); + } + return promiseResolvedWith(undefined); + }); + } + shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error); + }; + if (signal.aborted) { + abortAlgorithm(); + return; + } + signal.addEventListener('abort', abortAlgorithm); + } + // Using reader and writer, read all chunks from this and write them to dest + // - Backpressure must be enforced + // - Shutdown must stop all activity + function pipeLoop() { + return newPromise((resolveLoop, rejectLoop) => { + function next(done) { + if (done) { + resolveLoop(); + } + else { + // Use `PerformPromiseThen` instead of `uponPromise` to avoid + // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers + PerformPromiseThen(pipeStep(), next, rejectLoop); + } + } + next(false); + }); + } + function pipeStep() { + if (shuttingDown) { + return promiseResolvedWith(true); + } + return PerformPromiseThen(writer._readyPromise, () => { + return newPromise((resolveRead, rejectRead) => { + ReadableStreamDefaultReaderRead(reader, { + _chunkSteps: chunk => { + currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop); + resolveRead(false); + }, + _closeSteps: () => resolveRead(true), + _errorSteps: rejectRead + }); + }); + }); + } + // Errors must be propagated forward + isOrBecomesErrored(source, reader._closedPromise, storedError => { + if (!preventAbort) { + shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Errors must be propagated backward + isOrBecomesErrored(dest, writer._closedPromise, storedError => { + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Closing must be propagated forward + isOrBecomesClosed(source, reader._closedPromise, () => { + if (!preventClose) { + shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer)); + } + else { + shutdown(); + } + return null; + }); + // Closing must be propagated backward + if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') { + const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it'); + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed); + } + else { + shutdown(true, destClosed); + } + } + setPromiseIsHandledToTrue(pipeLoop()); + function waitForWritesToFinish() { + // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait + // for that too. + const oldCurrentWrite = currentWrite; + return PerformPromiseThen(currentWrite, () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined); + } + function isOrBecomesErrored(stream, promise, action) { + if (stream._state === 'errored') { + action(stream._storedError); + } + else { + uponRejection(promise, action); + } + } + function isOrBecomesClosed(stream, promise, action) { + if (stream._state === 'closed') { + action(); + } + else { + uponFulfillment(promise, action); + } + } + function shutdownWithAction(action, originalIsError, originalError) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), doTheRest); + } + else { + doTheRest(); + } + function doTheRest() { + uponPromise(action(), () => finalize(originalIsError, originalError), newError => finalize(true, newError)); + return null; + } + } + function shutdown(isError, error) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error)); + } + else { + finalize(isError, error); + } + } + function finalize(isError, error) { + WritableStreamDefaultWriterRelease(writer); + ReadableStreamReaderGenericRelease(reader); + if (signal !== undefined) { + signal.removeEventListener('abort', abortAlgorithm); + } + if (isError) { + reject(error); + } + else { + resolve(undefined); + } + return null; + } + }); + } + + /** + * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue. + * + * @public + */ + class ReadableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('desiredSize'); + } + return ReadableStreamDefaultControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('close'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits close'); + } + ReadableStreamDefaultControllerClose(this); + } + enqueue(chunk = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('enqueue'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits enqueue'); + } + return ReadableStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('error'); + } + ReadableStreamDefaultControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableStream; + if (this._queue.length > 0) { + const chunk = DequeueValue(this); + if (this._closeRequested && this._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(this); + ReadableStreamClose(stream); + } + else { + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + readRequest._chunkSteps(chunk); + } + else { + ReadableStreamAddReadRequest(stream, readRequest); + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + } + /** @internal */ + [ReleaseSteps]() { + // Do nothing. + } + } + Object.defineProperties(ReadableStreamDefaultController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(ReadableStreamDefaultController.prototype.close, 'close'); + setFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue'); + setFunctionName(ReadableStreamDefaultController.prototype.error, 'error'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultController', + configurable: true + }); + } + // Abstract operations for the ReadableStreamDefaultController. + function IsReadableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) { + return false; + } + return x instanceof ReadableStreamDefaultController; + } + function ReadableStreamDefaultControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableStreamDefaultControllerError(controller, e); + return null; + }); + } + function ReadableStreamDefaultControllerShouldCallPull(controller) { + const stream = controller._controlledReadableStream; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return false; + } + if (!controller._started) { + return false; + } + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; + } + function ReadableStreamDefaultControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; + } + // A client of ReadableStreamDefaultController may use these functions directly to bypass state check. + function ReadableStreamDefaultControllerClose(controller) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + controller._closeRequested = true; + if (controller._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } + } + function ReadableStreamDefaultControllerEnqueue(controller, chunk) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + ReadableStreamFulfillReadRequest(stream, chunk, false); + } + else { + let chunkSize; + try { + chunkSize = controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + ReadableStreamDefaultControllerError(controller, chunkSizeE); + throw chunkSizeE; + } + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + ReadableStreamDefaultControllerError(controller, enqueueE); + throw enqueueE; + } + } + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + function ReadableStreamDefaultControllerError(controller, e) { + const stream = controller._controlledReadableStream; + if (stream._state !== 'readable') { + return; + } + ResetQueue(controller); + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); + } + function ReadableStreamDefaultControllerGetDesiredSize(controller) { + const state = controller._controlledReadableStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; + } + // This is used in the implementation of TransformStream. + function ReadableStreamDefaultControllerHasBackpressure(controller) { + if (ReadableStreamDefaultControllerShouldCallPull(controller)) { + return false; + } + return true; + } + function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) { + const state = controller._controlledReadableStream._state; + if (!controller._closeRequested && state === 'readable') { + return true; + } + return false; + } + function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledReadableStream = stream; + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._started = false; + controller._closeRequested = false; + controller._pullAgain = false; + controller._pulling = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableStreamDefaultControllerError(controller, r); + return null; + }); + } + function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) { + const controller = Object.create(ReadableStreamDefaultController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingSource.start !== undefined) { + startAlgorithm = () => underlyingSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSource.pull !== undefined) { + pullAlgorithm = () => underlyingSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + } + // Helper functions for the ReadableStreamDefaultController. + function defaultControllerBrandCheckException$1(name) { + return new TypeError(`ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`); + } + + function ReadableStreamTee(stream, cloneForBranch2) { + if (IsReadableByteStreamController(stream._readableStreamController)) { + return ReadableByteStreamTee(stream); + } + return ReadableStreamDefaultTee(stream); + } + function ReadableStreamDefaultTee(stream, cloneForBranch2) { + const reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgain = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function pullAlgorithm() { + if (reading) { + readAgain = true; + return promiseResolvedWith(undefined); + } + reading = true; + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgain = false; + const chunk1 = chunk; + const chunk2 = chunk; + // There is no way to access the cloning code right now in the reference implementation. + // If we add one then we'll need an implementation for serializable objects. + // if (!canceled2 && cloneForBranch2) { + // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2)); + // } + if (!canceled1) { + ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgain) { + pullAlgorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableStreamDefaultControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableStreamDefaultControllerClose(branch2._readableStreamController); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + // do nothing + } + branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm); + branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm); + uponRejection(reader._closedPromise, (r) => { + ReadableStreamDefaultControllerError(branch1._readableStreamController, r); + ReadableStreamDefaultControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + return [branch1, branch2]; + } + function ReadableByteStreamTee(stream) { + let reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgainForBranch1 = false; + let readAgainForBranch2 = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function forwardReaderError(thisReader) { + uponRejection(thisReader._closedPromise, r => { + if (thisReader !== reader) { + return null; + } + ReadableByteStreamControllerError(branch1._readableStreamController, r); + ReadableByteStreamControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + } + function pullWithDefaultReader() { + if (IsReadableStreamBYOBReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamDefaultReader(stream); + forwardReaderError(reader); + } + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const chunk1 = chunk; + let chunk2 = chunk; + if (!canceled1 && !canceled2) { + try { + chunk2 = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(branch1._readableStreamController, cloneE); + ReadableByteStreamControllerError(branch2._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + } + if (!canceled1) { + ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableByteStreamControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableByteStreamControllerClose(branch2._readableStreamController); + } + if (branch1._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch1._readableStreamController, 0); + } + if (branch2._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch2._readableStreamController, 0); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + } + function pullWithBYOBReader(view, forBranch2) { + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamBYOBReader(stream); + forwardReaderError(reader); + } + const byobBranch = forBranch2 ? branch2 : branch1; + const otherBranch = forBranch2 ? branch1 : branch2; + const readIntoRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!otherCanceled) { + let clonedChunk; + try { + clonedChunk = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE); + ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk); + } + else if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: chunk => { + reading = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!byobCanceled) { + ReadableByteStreamControllerClose(byobBranch._readableStreamController); + } + if (!otherCanceled) { + ReadableByteStreamControllerClose(otherBranch._readableStreamController); + } + if (chunk !== undefined) { + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0); + } + } + if (!byobCanceled || !otherCanceled) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest); + } + function pull1Algorithm() { + if (reading) { + readAgainForBranch1 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, false); + } + return promiseResolvedWith(undefined); + } + function pull2Algorithm() { + if (reading) { + readAgainForBranch2 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, true); + } + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + return; + } + branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm); + branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm); + forwardReaderError(reader); + return [branch1, branch2]; + } + + function isReadableStreamLike(stream) { + return typeIsObject(stream) && typeof stream.getReader !== 'undefined'; + } + + function ReadableStreamFrom(source) { + if (isReadableStreamLike(source)) { + return ReadableStreamFromDefaultReader(source.getReader()); + } + return ReadableStreamFromIterable(source); + } + function ReadableStreamFromIterable(asyncIterable) { + let stream; + const iteratorRecord = GetIterator(asyncIterable, 'async'); + const startAlgorithm = noop; + function pullAlgorithm() { + let nextResult; + try { + nextResult = IteratorNext(iteratorRecord); + } + catch (e) { + return promiseRejectedWith(e); + } + const nextPromise = promiseResolvedWith(nextResult); + return transformPromiseWith(nextPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object'); + } + const done = IteratorComplete(iterResult); + if (done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = IteratorValue(iterResult); + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + const iterator = iteratorRecord.iterator; + let returnMethod; + try { + returnMethod = GetMethod(iterator, 'return'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (returnMethod === undefined) { + return promiseResolvedWith(undefined); + } + let returnResult; + try { + returnResult = reflectCall(returnMethod, iterator, [reason]); + } + catch (e) { + return promiseRejectedWith(e); + } + const returnPromise = promiseResolvedWith(returnResult); + return transformPromiseWith(returnPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object'); + } + return undefined; + }); + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; + } + function ReadableStreamFromDefaultReader(reader) { + let stream; + const startAlgorithm = noop; + function pullAlgorithm() { + let readPromise; + try { + readPromise = reader.read(); + } + catch (e) { + return promiseRejectedWith(e); + } + return transformPromiseWith(readPromise, readResult => { + if (!typeIsObject(readResult)) { + throw new TypeError('The promise returned by the reader.read() method must fulfill with an object'); + } + if (readResult.done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = readResult.value; + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + try { + return promiseResolvedWith(reader.cancel(reason)); + } + catch (e) { + return promiseRejectedWith(e); + } + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; + } + + function convertUnderlyingDefaultOrByteSource(source, context) { + assertDictionary(source, context); + const original = source; + const autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize; + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const pull = original === null || original === void 0 ? void 0 : original.pull; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + return { + autoAllocateChunkSize: autoAllocateChunkSize === undefined ? + undefined : + convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, `${context} has member 'autoAllocateChunkSize' that`), + cancel: cancel === undefined ? + undefined : + convertUnderlyingSourceCancelCallback(cancel, original, `${context} has member 'cancel' that`), + pull: pull === undefined ? + undefined : + convertUnderlyingSourcePullCallback(pull, original, `${context} has member 'pull' that`), + start: start === undefined ? + undefined : + convertUnderlyingSourceStartCallback(start, original, `${context} has member 'start' that`), + type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`) + }; + } + function convertUnderlyingSourceCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); + } + function convertUnderlyingSourcePullCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); + } + function convertUnderlyingSourceStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); + } + function convertReadableStreamType(type, context) { + type = `${type}`; + if (type !== 'bytes') { + throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`); + } + return type; + } + + function convertIteratorOptions(options, context) { + assertDictionary(options, context); + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + return { preventCancel: Boolean(preventCancel) }; + } + + function convertPipeOptions(options, context) { + assertDictionary(options, context); + const preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort; + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + const preventClose = options === null || options === void 0 ? void 0 : options.preventClose; + const signal = options === null || options === void 0 ? void 0 : options.signal; + if (signal !== undefined) { + assertAbortSignal(signal, `${context} has member 'signal' that`); + } + return { + preventAbort: Boolean(preventAbort), + preventCancel: Boolean(preventCancel), + preventClose: Boolean(preventClose), + signal + }; + } + function assertAbortSignal(signal, context) { + if (!isAbortSignal(signal)) { + throw new TypeError(`${context} is not an AbortSignal.`); + } + } + + function convertReadableWritablePair(pair, context) { + assertDictionary(pair, context); + const readable = pair === null || pair === void 0 ? void 0 : pair.readable; + assertRequiredField(readable, 'readable', 'ReadableWritablePair'); + assertReadableStream(readable, `${context} has member 'readable' that`); + const writable = pair === null || pair === void 0 ? void 0 : pair.writable; + assertRequiredField(writable, 'writable', 'ReadableWritablePair'); + assertWritableStream(writable, `${context} has member 'writable' that`); + return { readable, writable }; + } + + /** + * A readable stream represents a source of data, from which you can read. + * + * @public + */ + class ReadableStream { + constructor(rawUnderlyingSource = {}, rawStrategy = {}) { + if (rawUnderlyingSource === undefined) { + rawUnderlyingSource = null; + } + else { + assertObject(rawUnderlyingSource, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter'); + InitializeReadableStream(this); + if (underlyingSource.type === 'bytes') { + if (strategy.size !== undefined) { + throw new RangeError('The strategy for a byte stream cannot have a size function'); + } + const highWaterMark = ExtractHighWaterMark(strategy, 0); + SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark); + } + else { + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm); + } + } + /** + * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}. + */ + get locked() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('locked'); + } + return IsReadableStreamLocked(this); + } + /** + * Cancels the stream, signaling a loss of interest in the stream by a consumer. + * + * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()} + * method, which might or might not use it. + */ + cancel(reason = undefined) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('cancel')); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader')); + } + return ReadableStreamCancel(this, reason); + } + getReader(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('getReader'); + } + const options = convertReaderOptions(rawOptions, 'First parameter'); + if (options.mode === undefined) { + return AcquireReadableStreamDefaultReader(this); + } + return AcquireReadableStreamBYOBReader(this); + } + pipeThrough(rawTransform, rawOptions = {}) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('pipeThrough'); + } + assertRequiredArgument(rawTransform, 1, 'pipeThrough'); + const transform = convertReadableWritablePair(rawTransform, 'First parameter'); + const options = convertPipeOptions(rawOptions, 'Second parameter'); + if (IsReadableStreamLocked(this)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream'); + } + if (IsWritableStreamLocked(transform.writable)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream'); + } + const promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + setPromiseIsHandledToTrue(promise); + return transform.readable; + } + pipeTo(destination, rawOptions = {}) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('pipeTo')); + } + if (destination === undefined) { + return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`); + } + if (!IsWritableStream(destination)) { + return promiseRejectedWith(new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)); + } + let options; + try { + options = convertPipeOptions(rawOptions, 'Second parameter'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')); + } + if (IsWritableStreamLocked(destination)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')); + } + return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + } + /** + * Tees this readable stream, returning a two-element array containing the two resulting branches as + * new {@link ReadableStream} instances. + * + * Teeing a stream will lock it, preventing any other consumer from acquiring a reader. + * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be + * propagated to the stream's underlying source. + * + * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable, + * this could allow interference between the two branches. + */ + tee() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('tee'); + } + const branches = ReadableStreamTee(this); + return CreateArrayFromList(branches); + } + values(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('values'); + } + const options = convertIteratorOptions(rawOptions, 'First parameter'); + return AcquireReadableStreamAsyncIterator(this, options.preventCancel); + } + [SymbolAsyncIterator](options) { + // Stub implementation, overridden below + return this.values(options); + } + /** + * Creates a new ReadableStream wrapping the provided iterable or async iterable. + * + * This can be used to adapt various kinds of objects into a readable stream, + * such as an array, an async generator, or a Node.js readable stream. + */ + static from(asyncIterable) { + return ReadableStreamFrom(asyncIterable); + } + } + Object.defineProperties(ReadableStream, { + from: { enumerable: true } + }); + Object.defineProperties(ReadableStream.prototype, { + cancel: { enumerable: true }, + getReader: { enumerable: true }, + pipeThrough: { enumerable: true }, + pipeTo: { enumerable: true }, + tee: { enumerable: true }, + values: { enumerable: true }, + locked: { enumerable: true } + }); + setFunctionName(ReadableStream.from, 'from'); + setFunctionName(ReadableStream.prototype.cancel, 'cancel'); + setFunctionName(ReadableStream.prototype.getReader, 'getReader'); + setFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough'); + setFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo'); + setFunctionName(ReadableStream.prototype.tee, 'tee'); + setFunctionName(ReadableStream.prototype.values, 'values'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, { + value: 'ReadableStream', + configurable: true + }); + } + Object.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, { + value: ReadableStream.prototype.values, + writable: true, + configurable: true + }); + // Abstract operations for the ReadableStream. + // Throws if and only if startAlgorithm throws. + function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableStreamDefaultController.prototype); + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + return stream; + } + // Throws if and only if startAlgorithm throws. + function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableByteStreamController.prototype); + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined); + return stream; + } + function InitializeReadableStream(stream) { + stream._state = 'readable'; + stream._reader = undefined; + stream._storedError = undefined; + stream._disturbed = false; + } + function IsReadableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) { + return false; + } + return x instanceof ReadableStream; + } + function IsReadableStreamLocked(stream) { + if (stream._reader === undefined) { + return false; + } + return true; + } + // ReadableStream API exposed for controllers. + function ReadableStreamCancel(stream, reason) { + stream._disturbed = true; + if (stream._state === 'closed') { + return promiseResolvedWith(undefined); + } + if (stream._state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + ReadableStreamClose(stream); + const reader = stream._reader; + if (reader !== undefined && IsReadableStreamBYOBReader(reader)) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._closeSteps(undefined); + }); + } + const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason); + return transformPromiseWith(sourceCancelPromise, noop); + } + function ReadableStreamClose(stream) { + stream._state = 'closed'; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseResolve(reader); + if (IsReadableStreamDefaultReader(reader)) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._closeSteps(); + }); + } + } + function ReadableStreamError(stream, e) { + stream._state = 'errored'; + stream._storedError = e; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseReject(reader, e); + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + else { + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } + } + // Helper functions for the ReadableStream. + function streamBrandCheckException$1(name) { + return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`); + } + + function convertQueuingStrategyInit(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit'); + return { + highWaterMark: convertUnrestrictedDouble(highWaterMark) + }; + } + + // The size function must not have a prototype property nor be a constructor + const byteLengthSizeFunction = (chunk) => { + return chunk.byteLength; + }; + setFunctionName(byteLengthSizeFunction, 'size'); + /** + * A queuing strategy that counts the number of bytes in each chunk. + * + * @public + */ + class ByteLengthQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('highWaterMark'); + } + return this._byteLengthQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by returning the value of its `byteLength` property. + */ + get size() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('size'); + } + return byteLengthSizeFunction; + } + } + Object.defineProperties(ByteLengthQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'ByteLengthQueuingStrategy', + configurable: true + }); + } + // Helper functions for the ByteLengthQueuingStrategy. + function byteLengthBrandCheckException(name) { + return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`); + } + function IsByteLengthQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof ByteLengthQueuingStrategy; + } + + // The size function must not have a prototype property nor be a constructor + const countSizeFunction = () => { + return 1; + }; + setFunctionName(countSizeFunction, 'size'); + /** + * A queuing strategy that counts the number of chunks. + * + * @public + */ + class CountQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'CountQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._countQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('highWaterMark'); + } + return this._countQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by always returning 1. + * This ensures that the total queue size is a count of the number of chunks in the queue. + */ + get size() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('size'); + } + return countSizeFunction; + } + } + Object.defineProperties(CountQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'CountQueuingStrategy', + configurable: true + }); + } + // Helper functions for the CountQueuingStrategy. + function countBrandCheckException(name) { + return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`); + } + function IsCountQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof CountQueuingStrategy; + } + + function convertTransformer(original, context) { + assertDictionary(original, context); + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const flush = original === null || original === void 0 ? void 0 : original.flush; + const readableType = original === null || original === void 0 ? void 0 : original.readableType; + const start = original === null || original === void 0 ? void 0 : original.start; + const transform = original === null || original === void 0 ? void 0 : original.transform; + const writableType = original === null || original === void 0 ? void 0 : original.writableType; + return { + cancel: cancel === undefined ? + undefined : + convertTransformerCancelCallback(cancel, original, `${context} has member 'cancel' that`), + flush: flush === undefined ? + undefined : + convertTransformerFlushCallback(flush, original, `${context} has member 'flush' that`), + readableType, + start: start === undefined ? + undefined : + convertTransformerStartCallback(start, original, `${context} has member 'start' that`), + transform: transform === undefined ? + undefined : + convertTransformerTransformCallback(transform, original, `${context} has member 'transform' that`), + writableType + }; + } + function convertTransformerFlushCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); + } + function convertTransformerStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); + } + function convertTransformerTransformCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); + } + function convertTransformerCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); + } + + // Class TransformStream + /** + * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream}, + * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side. + * In a manner specific to the transform stream in question, writes to the writable side result in new data being + * made available for reading from the readable side. + * + * @public + */ + class TransformStream { + constructor(rawTransformer = {}, rawWritableStrategy = {}, rawReadableStrategy = {}) { + if (rawTransformer === undefined) { + rawTransformer = null; + } + const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter'); + const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter'); + const transformer = convertTransformer(rawTransformer, 'First parameter'); + if (transformer.readableType !== undefined) { + throw new RangeError('Invalid readableType specified'); + } + if (transformer.writableType !== undefined) { + throw new RangeError('Invalid writableType specified'); + } + const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0); + const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy); + const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1); + const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy); + let startPromise_resolve; + const startPromise = newPromise(resolve => { + startPromise_resolve = resolve; + }); + InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + SetUpTransformStreamDefaultControllerFromTransformer(this, transformer); + if (transformer.start !== undefined) { + startPromise_resolve(transformer.start(this._transformStreamController)); + } + else { + startPromise_resolve(undefined); + } + } + /** + * The readable side of the transform stream. + */ + get readable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('readable'); + } + return this._readable; + } + /** + * The writable side of the transform stream. + */ + get writable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('writable'); + } + return this._writable; + } + } + Object.defineProperties(TransformStream.prototype, { + readable: { enumerable: true }, + writable: { enumerable: true } + }); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, { + value: 'TransformStream', + configurable: true + }); + } + function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) { + function startAlgorithm() { + return startPromise; + } + function writeAlgorithm(chunk) { + return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk); + } + function abortAlgorithm(reason) { + return TransformStreamDefaultSinkAbortAlgorithm(stream, reason); + } + function closeAlgorithm() { + return TransformStreamDefaultSinkCloseAlgorithm(stream); + } + stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm); + function pullAlgorithm() { + return TransformStreamDefaultSourcePullAlgorithm(stream); + } + function cancelAlgorithm(reason) { + return TransformStreamDefaultSourceCancelAlgorithm(stream, reason); + } + stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure. + stream._backpressure = undefined; + stream._backpressureChangePromise = undefined; + stream._backpressureChangePromise_resolve = undefined; + TransformStreamSetBackpressure(stream, true); + stream._transformStreamController = undefined; + } + function IsTransformStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) { + return false; + } + return x instanceof TransformStream; + } + // This is a no-op if both sides are already errored. + function TransformStreamError(stream, e) { + ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e); + TransformStreamErrorWritableAndUnblockWrite(stream, e); + } + function TransformStreamErrorWritableAndUnblockWrite(stream, e) { + TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController); + WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e); + TransformStreamUnblockWrite(stream); + } + function TransformStreamUnblockWrite(stream) { + if (stream._backpressure) { + // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure() + // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time + // _backpressure is set. + TransformStreamSetBackpressure(stream, false); + } + } + function TransformStreamSetBackpressure(stream, backpressure) { + // Passes also when called during construction. + if (stream._backpressureChangePromise !== undefined) { + stream._backpressureChangePromise_resolve(); + } + stream._backpressureChangePromise = newPromise(resolve => { + stream._backpressureChangePromise_resolve = resolve; + }); + stream._backpressure = backpressure; + } + // Class TransformStreamDefaultController + /** + * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}. + * + * @public + */ + class TransformStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full. + */ + get desiredSize() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('desiredSize'); + } + const readableController = this._controlledTransformStream._readable._readableStreamController; + return ReadableStreamDefaultControllerGetDesiredSize(readableController); + } + enqueue(chunk = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('enqueue'); + } + TransformStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors both the readable side and the writable side of the controlled transform stream, making all future + * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded. + */ + error(reason = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('error'); + } + TransformStreamDefaultControllerError(this, reason); + } + /** + * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the + * transformer only needs to consume a portion of the chunks written to the writable side. + */ + terminate() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('terminate'); + } + TransformStreamDefaultControllerTerminate(this); + } + } + Object.defineProperties(TransformStreamDefaultController.prototype, { + enqueue: { enumerable: true }, + error: { enumerable: true }, + terminate: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue'); + setFunctionName(TransformStreamDefaultController.prototype.error, 'error'); + setFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate'); + if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'TransformStreamDefaultController', + configurable: true + }); + } + // Transform Stream Default Controller Abstract Operations + function IsTransformStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) { + return false; + } + return x instanceof TransformStreamDefaultController; + } + function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm) { + controller._controlledTransformStream = stream; + stream._transformStreamController = controller; + controller._transformAlgorithm = transformAlgorithm; + controller._flushAlgorithm = flushAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._finishPromise = undefined; + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) { + const controller = Object.create(TransformStreamDefaultController.prototype); + let transformAlgorithm; + let flushAlgorithm; + let cancelAlgorithm; + if (transformer.transform !== undefined) { + transformAlgorithm = chunk => transformer.transform(chunk, controller); + } + else { + transformAlgorithm = chunk => { + try { + TransformStreamDefaultControllerEnqueue(controller, chunk); + return promiseResolvedWith(undefined); + } + catch (transformResultE) { + return promiseRejectedWith(transformResultE); + } + }; + } + if (transformer.flush !== undefined) { + flushAlgorithm = () => transformer.flush(controller); + } + else { + flushAlgorithm = () => promiseResolvedWith(undefined); + } + if (transformer.cancel !== undefined) { + cancelAlgorithm = reason => transformer.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm); + } + function TransformStreamDefaultControllerClearAlgorithms(controller) { + controller._transformAlgorithm = undefined; + controller._flushAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + } + function TransformStreamDefaultControllerEnqueue(controller, chunk) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) { + throw new TypeError('Readable side is not in a state that permits enqueue'); + } + // We throttle transform invocations based on the backpressure of the ReadableStream, but we still + // accept TransformStreamDefaultControllerEnqueue() calls. + try { + ReadableStreamDefaultControllerEnqueue(readableController, chunk); + } + catch (e) { + // This happens when readableStrategy.size() throws. + TransformStreamErrorWritableAndUnblockWrite(stream, e); + throw stream._readable._storedError; + } + const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController); + if (backpressure !== stream._backpressure) { + TransformStreamSetBackpressure(stream, true); + } + } + function TransformStreamDefaultControllerError(controller, e) { + TransformStreamError(controller._controlledTransformStream, e); + } + function TransformStreamDefaultControllerPerformTransform(controller, chunk) { + const transformPromise = controller._transformAlgorithm(chunk); + return transformPromiseWith(transformPromise, undefined, r => { + TransformStreamError(controller._controlledTransformStream, r); + throw r; + }); + } + function TransformStreamDefaultControllerTerminate(controller) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + ReadableStreamDefaultControllerClose(readableController); + const error = new TypeError('TransformStream terminated'); + TransformStreamErrorWritableAndUnblockWrite(stream, error); + } + // TransformStreamDefaultSink Algorithms + function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) { + const controller = stream._transformStreamController; + if (stream._backpressure) { + const backpressureChangePromise = stream._backpressureChangePromise; + return transformPromiseWith(backpressureChangePromise, () => { + const writable = stream._writable; + const state = writable._state; + if (state === 'erroring') { + throw writable._storedError; + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + }); + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + } + function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally, + // we don't run the _cancelAlgorithm again. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerError(readable._readableStreamController, reason); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + function TransformStreamDefaultSinkCloseAlgorithm(stream) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally, + // we don't also run the _cancelAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const flushPromise = controller._flushAlgorithm(); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(flushPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerClose(readable._readableStreamController); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + // TransformStreamDefaultSource Algorithms + function TransformStreamDefaultSourcePullAlgorithm(stream) { + // Invariant. Enforced by the promises returned by start() and pull(). + TransformStreamSetBackpressure(stream, false); + // Prevent the next pull() call until there is backpressure. + return stream._backpressureChangePromise; + } + function TransformStreamDefaultSourceCancelAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._writable cannot change after construction, so caching it across a call to user code is safe. + const writable = stream._writable; + // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or + // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the + // _flushAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (writable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, writable._storedError); + } + else { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + // Helper functions for the TransformStreamDefaultController. + function defaultControllerBrandCheckException(name) { + return new TypeError(`TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`); + } + function defaultControllerFinishPromiseResolve(controller) { + if (controller._finishPromise_resolve === undefined) { + return; + } + controller._finishPromise_resolve(); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + function defaultControllerFinishPromiseReject(controller, reason) { + if (controller._finishPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(controller._finishPromise); + controller._finishPromise_reject(reason); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + // Helper functions for the TransformStream. + function streamBrandCheckException(name) { + return new TypeError(`TransformStream.prototype.${name} can only be used on a TransformStream`); + } + + exports.ByteLengthQueuingStrategy = ByteLengthQueuingStrategy; + exports.CountQueuingStrategy = CountQueuingStrategy; + exports.ReadableByteStreamController = ReadableByteStreamController; + exports.ReadableStream = ReadableStream; + exports.ReadableStreamBYOBReader = ReadableStreamBYOBReader; + exports.ReadableStreamBYOBRequest = ReadableStreamBYOBRequest; + exports.ReadableStreamDefaultController = ReadableStreamDefaultController; + exports.ReadableStreamDefaultReader = ReadableStreamDefaultReader; + exports.TransformStream = TransformStream; + exports.TransformStreamDefaultController = TransformStreamDefaultController; + exports.WritableStream = WritableStream; + exports.WritableStreamDefaultController = WritableStreamDefaultController; + exports.WritableStreamDefaultWriter = WritableStreamDefaultWriter; + +})); +//# sourceMappingURL=ponyfill.es6.js.map diff --git a/node_modules/web-streams-polyfill/dist/ponyfill.es6.js.map b/node_modules/web-streams-polyfill/dist/ponyfill.es6.js.map new file mode 100644 index 00000000..1f0b1873 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/ponyfill.es6.js.map @@ -0,0 +1 @@ +{"version":3,"file":"ponyfill.es6.js","sources":["../src/utils.ts","../src/lib/helpers/miscellaneous.ts","../src/lib/helpers/webidl.ts","../src/lib/simple-queue.ts","../src/lib/abstract-ops/internal-methods.ts","../src/lib/readable-stream/generic-reader.ts","../src/stub/number-isfinite.ts","../src/stub/math-trunc.ts","../src/lib/validators/basic.ts","../src/lib/validators/readable-stream.ts","../src/lib/readable-stream/default-reader.ts","../node_modules/tslib/tslib.es6.js","../src/lib/abstract-ops/ecmascript.ts","../src/target/es5/stub/async-iterator-prototype.ts","../src/lib/readable-stream/async-iterator.ts","../src/stub/number-isnan.ts","../src/lib/abstract-ops/miscellaneous.ts","../src/lib/abstract-ops/queue-with-sizes.ts","../src/lib/helpers/array-buffer-view.ts","../src/lib/readable-stream/byte-stream-controller.ts","../src/lib/validators/reader-options.ts","../src/lib/readable-stream/byob-reader.ts","../src/lib/abstract-ops/queuing-strategy.ts","../src/lib/validators/queuing-strategy.ts","../src/lib/validators/underlying-sink.ts","../src/lib/validators/writable-stream.ts","../src/lib/abort-signal.ts","../src/lib/writable-stream.ts","../src/globals.ts","../src/stub/dom-exception.ts","../src/lib/readable-stream/pipe.ts","../src/lib/readable-stream/default-controller.ts","../src/lib/readable-stream/tee.ts","../src/lib/readable-stream/readable-stream-like.ts","../src/lib/readable-stream/from.ts","../src/lib/validators/underlying-source.ts","../src/lib/validators/iterator-options.ts","../src/lib/validators/pipe-options.ts","../src/lib/validators/readable-writable-pair.ts","../src/lib/readable-stream.ts","../src/lib/validators/queuing-strategy-init.ts","../src/lib/byte-length-queuing-strategy.ts","../src/lib/count-queuing-strategy.ts","../src/lib/validators/transformer.ts","../src/lib/transform-stream.ts"],"sourcesContent":["export function noop(): undefined {\n return undefined;\n}\n","import { noop } from '../../utils';\nimport { AssertionError } from '../../stub/assert';\n\nexport function typeIsObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport const rethrowAssertionErrorRejection: (e: any) => void =\n DEBUG ? e => {\n // Used throughout the reference implementation, as `.catch(rethrowAssertionErrorRejection)`, to ensure any errors\n // get shown. There are places in the spec where we do promise transformations and purposefully ignore or don't\n // expect any errors, but assertion errors are always problematic.\n if (e && e instanceof AssertionError) {\n setTimeout(() => {\n throw e;\n }, 0);\n }\n } : noop;\n\nexport function setFunctionName(fn: Function, name: string): void {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n } catch {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n}\n","import { rethrowAssertionErrorRejection } from './miscellaneous';\nimport assert from '../../stub/assert';\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\n\n// https://webidl.spec.whatwg.org/#a-new-promise\nexport function newPromise(executor: (\n resolve: (value: T | PromiseLike) => void,\n reject: (reason?: any) => void\n) => void): Promise {\n return new originalPromise(executor);\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-resolved-with\nexport function promiseResolvedWith(value: T | PromiseLike): Promise {\n return newPromise(resolve => resolve(value));\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-rejected-with\nexport function promiseRejectedWith(reason: any): Promise {\n return originalPromiseReject(reason);\n}\n\nexport function PerformPromiseThen(\n promise: Promise,\n onFulfilled?: (value: T) => TResult1 | PromiseLike,\n onRejected?: (reason: any) => TResult2 | PromiseLike): Promise {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected) as Promise;\n}\n\n// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n// from that handler. To prevent this, return null instead of void from all handlers.\n// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\nexport function uponPromise(\n promise: Promise,\n onFulfilled?: (value: T) => null | PromiseLike,\n onRejected?: (reason: any) => null | PromiseLike): void {\n PerformPromiseThen(\n PerformPromiseThen(promise, onFulfilled, onRejected),\n undefined,\n rethrowAssertionErrorRejection\n );\n}\n\nexport function uponFulfillment(promise: Promise, onFulfilled: (value: T) => null | PromiseLike): void {\n uponPromise(promise, onFulfilled);\n}\n\nexport function uponRejection(promise: Promise, onRejected: (reason: any) => null | PromiseLike): void {\n uponPromise(promise, undefined, onRejected);\n}\n\nexport function transformPromiseWith(\n promise: Promise,\n fulfillmentHandler?: (value: T) => TResult1 | PromiseLike,\n rejectionHandler?: (reason: any) => TResult2 | PromiseLike): Promise {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\n\nexport function setPromiseIsHandledToTrue(promise: Promise): void {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\nlet _queueMicrotask: (callback: () => void) => void = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n } else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n};\n\nexport { _queueMicrotask as queueMicrotask };\n\nexport function reflectCall(F: (this: T, ...fnArgs: A) => R, V: T, args: A): R {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n}\n\nexport function promiseCall(F: (this: T, ...fnArgs: A) => R | PromiseLike,\n V: T,\n args: A): Promise {\n assert(typeof F === 'function');\n assert(V !== undefined);\n assert(Array.isArray(args));\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n } catch (value) {\n return promiseRejectedWith(value);\n }\n}\n","import assert from '../stub/assert';\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n\ninterface Node {\n _elements: T[];\n _next: Node | undefined;\n}\n\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nexport class SimpleQueue {\n private _front: Node;\n private _back: Node;\n private _cursor = 0;\n private _size = 0;\n\n constructor() {\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n\n get length(): number {\n return this._size;\n }\n\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element: T): void {\n const oldBack = this._back;\n let newBack = oldBack;\n assert(oldBack._next === undefined);\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n assert(elements.length === QUEUE_MAX_ARRAY_SIZE);\n assert(oldFront._next !== undefined);\n newFront = oldFront._next!;\n newCursor = 0;\n }\n\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined!;\n\n return element;\n }\n\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback: (element: T) => void): void {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n assert(node._next !== undefined);\n assert(i === QUEUE_MAX_ARRAY_SIZE);\n node = node._next!;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n}\n","export const AbortSteps = Symbol('[[AbortSteps]]');\nexport const ErrorSteps = Symbol('[[ErrorSteps]]');\nexport const CancelSteps = Symbol('[[CancelSteps]]');\nexport const PullSteps = Symbol('[[PullSteps]]');\nexport const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n","import assert from '../../stub/assert';\nimport { ReadableStream, ReadableStreamCancel, type ReadableStreamReader } from '../readable-stream';\nimport { newPromise, setPromiseIsHandledToTrue } from '../helpers/webidl';\nimport { ReleaseSteps } from '../abstract-ops/internal-methods';\n\nexport function ReadableStreamReaderGenericInitialize(reader: ReadableStreamReader, stream: ReadableStream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n } else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n } else {\n assert(stream._state === 'errored');\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n}\n\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\n\nexport function ReadableStreamReaderGenericCancel(reader: ReadableStreamReader, reason: any): Promise {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n return ReadableStreamCancel(stream, reason);\n}\n\nexport function ReadableStreamReaderGenericRelease(reader: ReadableStreamReader) {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n assert(stream._reader === reader);\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n } else {\n defaultReaderClosedPromiseResetToRejected(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n\n stream._readableStreamController[ReleaseSteps]();\n\n stream._reader = undefined;\n reader._ownerReadableStream = undefined!;\n}\n\n// Helper functions for the readers.\n\nexport function readerLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nexport function defaultReaderClosedPromiseInitialize(reader: ReadableStreamReader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n}\n\nexport function defaultReaderClosedPromiseInitializeAsRejected(reader: ReadableStreamReader, reason: any) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseInitializeAsResolved(reader: ReadableStreamReader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n}\n\nexport function defaultReaderClosedPromiseReject(reader: ReadableStreamReader, reason: any) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n\nexport function defaultReaderClosedPromiseResetToRejected(reader: ReadableStreamReader, reason: any) {\n assert(reader._closedPromise_resolve === undefined);\n assert(reader._closedPromise_reject === undefined);\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseResolve(reader: ReadableStreamReader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite: typeof Number.isFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n};\n\nexport default NumberIsFinite;\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc: typeof Math.trunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\nexport default MathTrunc;\n","import NumberIsFinite from '../../stub/number-isfinite';\nimport MathTrunc from '../../stub/math-trunc';\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nexport function isDictionary(x: any): x is object | null {\n return typeof x === 'object' || typeof x === 'function';\n}\n\nexport function assertDictionary(obj: unknown,\n context: string): asserts obj is object | null | undefined {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport type AnyFunction = (...args: any[]) => any;\n\n// https://heycam.github.io/webidl/#idl-callback-functions\nexport function assertFunction(x: unknown, context: string): asserts x is AnyFunction {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-object\nexport function isObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport function assertObject(x: unknown,\n context: string): asserts x is object {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport function assertRequiredArgument(x: T | undefined,\n position: number,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n}\n\nexport function assertRequiredField(x: T | undefined,\n field: string,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nexport function convertUnrestrictedDouble(value: unknown): number {\n return Number(value);\n}\n\nfunction censorNegativeZero(x: number): number {\n return x === 0 ? 0 : x;\n}\n\nfunction integerPart(x: number): number {\n return censorNegativeZero(MathTrunc(x));\n}\n\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nexport function convertUnsignedLongLongWithEnforceRange(value: unknown, context: string): number {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n\n let x = Number(value);\n x = censorNegativeZero(x);\n\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n\n x = integerPart(x);\n\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n\n return x;\n}\n","import { IsReadableStream, ReadableStream } from '../readable-stream';\n\nexport function assertReadableStream(x: unknown, context: string): asserts x is ReadableStream {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, ReadableStream } from '../readable-stream';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { PullSteps } from '../abstract-ops/internal-methods';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\n\n/**\n * A result returned by {@link ReadableStreamDefaultReader.read}.\n *\n * @public\n */\nexport type ReadableStreamDefaultReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value?: undefined;\n}\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamDefaultReader(stream: ReadableStream): ReadableStreamDefaultReader {\n return new ReadableStreamDefaultReader(stream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadRequest(stream: ReadableStream,\n readRequest: ReadRequest): void {\n assert(IsReadableStreamDefaultReader(stream._reader));\n assert(stream._state === 'readable');\n\n (stream._reader! as ReadableStreamDefaultReader)._readRequests.push(readRequest);\n}\n\nexport function ReadableStreamFulfillReadRequest(stream: ReadableStream, chunk: R | undefined, done: boolean) {\n const reader = stream._reader as ReadableStreamDefaultReader;\n\n assert(reader._readRequests.length > 0);\n\n const readRequest = reader._readRequests.shift()!;\n if (done) {\n readRequest._closeSteps();\n } else {\n readRequest._chunkSteps(chunk!);\n }\n}\n\nexport function ReadableStreamGetNumReadRequests(stream: ReadableStream): number {\n return (stream._reader as ReadableStreamDefaultReader)._readRequests.length;\n}\n\nexport function ReadableStreamHasDefaultReader(stream: ReadableStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadRequest {\n _chunkSteps(chunk: R): void;\n\n _closeSteps(): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamDefaultReader {\n /** @internal */\n _ownerReadableStream!: ReadableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(): Promise> {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamDefaultReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamDefaultReader(x: any): x is ReadableStreamDefaultReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultReader;\n}\n\nexport function ReadableStreamDefaultReaderRead(reader: ReadableStreamDefaultReader,\n readRequest: ReadRequest): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n } else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n } else {\n assert(stream._state === 'readable');\n stream._readableStreamController[PullSteps](readRequest as ReadRequest);\n }\n}\n\nexport function ReadableStreamDefaultReaderRelease(reader: ReadableStreamDefaultReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n}\n\nexport function ReadableStreamDefaultReaderErrorReadRequests(reader: ReadableStreamDefaultReader, e: any) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nfunction defaultReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n","/******************************************************************************\r\nCopyright (c) Microsoft Corporation.\r\n\r\nPermission to use, copy, modify, and/or distribute this software for any\r\npurpose with or without fee is hereby granted.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\r\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY\r\nAND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\r\n***************************************************************************** */\r\n/* global Reflect, Promise, SuppressedError, Symbol */\r\n\r\nvar extendStatics = function(d, b) {\r\n extendStatics = Object.setPrototypeOf ||\r\n ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\r\n return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n if (typeof b !== \"function\" && b !== null)\r\n throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\r\n extendStatics(d, b);\r\n function __() { this.constructor = d; }\r\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\nexport var __assign = function() {\r\n __assign = Object.assign || function __assign(t) {\r\n for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n s = arguments[i];\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n }\r\n return t;\r\n }\r\n return __assign.apply(this, arguments);\r\n}\r\n\r\nexport function __rest(s, e) {\r\n var t = {};\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\r\n t[p] = s[p];\r\n if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\r\n for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {\r\n if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))\r\n t[p[i]] = s[p[i]];\r\n }\r\n return t;\r\n}\r\n\r\nexport function __decorate(decorators, target, key, desc) {\r\n var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\r\n if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\r\n else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\r\n return c > 3 && r && Object.defineProperty(target, key, r), r;\r\n}\r\n\r\nexport function __param(paramIndex, decorator) {\r\n return function (target, key) { decorator(target, key, paramIndex); }\r\n}\r\n\r\nexport function __esDecorate(ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {\r\n function accept(f) { if (f !== void 0 && typeof f !== \"function\") throw new TypeError(\"Function expected\"); return f; }\r\n var kind = contextIn.kind, key = kind === \"getter\" ? \"get\" : kind === \"setter\" ? \"set\" : \"value\";\r\n var target = !descriptorIn && ctor ? contextIn[\"static\"] ? ctor : ctor.prototype : null;\r\n var descriptor = descriptorIn || (target ? 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(function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n var desc = Object.getOwnPropertyDescriptor(m, k);\r\n if (!desc || (\"get\" in desc ? !m.__esModule : desc.writable || desc.configurable)) {\r\n desc = { enumerable: true, get: function() { return m[k]; } };\r\n }\r\n Object.defineProperty(o, k2, desc);\r\n}) : (function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n o[k2] = m[k];\r\n});\r\n\r\nexport function __exportStar(m, o) {\r\n for (var p in m) if (p !== \"default\" && !Object.prototype.hasOwnProperty.call(o, p)) __createBinding(o, m, p);\r\n}\r\n\r\nexport function __values(o) {\r\n var s = typeof Symbol === \"function\" && Symbol.iterator, m = s && o[s], i = 0;\r\n if (m) return m.call(o);\r\n if (o && typeof o.length === \"number\") return {\r\n next: function () {\r\n if (o && i >= o.length) o = void 0;\r\n return { value: o && o[i++], done: !o };\r\n }\r\n };\r\n throw new TypeError(s ? \"Object is not iterable.\" : \"Symbol.iterator is not defined.\");\r\n}\r\n\r\nexport function __read(o, n) {\r\n var m = typeof Symbol === \"function\" && o[Symbol.iterator];\r\n if (!m) return o;\r\n var i = m.call(o), r, ar = [], e;\r\n try {\r\n while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\r\n }\r\n catch (error) { e = { error: error }; }\r\n finally {\r\n try {\r\n if (r && !r.done && (m = i[\"return\"])) m.call(i);\r\n }\r\n finally { if (e) throw e.error; }\r\n }\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spread() {\r\n for (var ar = [], i = 0; i < arguments.length; i++)\r\n ar = ar.concat(__read(arguments[i]));\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spreadArrays() {\r\n for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;\r\n for (var r = Array(s), k = 0, i = 0; i < il; i++)\r\n for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)\r\n r[k] = a[j];\r\n return r;\r\n}\r\n\r\nexport function __spreadArray(to, from, pack) {\r\n if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {\r\n if (ar || !(i in from)) {\r\n if (!ar) ar = Array.prototype.slice.call(from, 0, i);\r\n ar[i] = from[i];\r\n }\r\n }\r\n return to.concat(ar || Array.prototype.slice.call(from));\r\n}\r\n\r\nexport function __await(v) {\r\n return this instanceof __await ? (this.v = v, this) : new __await(v);\r\n}\r\n\r\nexport function __asyncGenerator(thisArg, _arguments, generator) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var g = generator.apply(thisArg, _arguments || []), i, q = [];\r\n return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\r\n function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\r\n function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\r\n function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n function fulfill(value) { resume(\"next\", value); }\r\n function reject(value) { resume(\"throw\", value); }\r\n function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n var i, p;\r\n return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var m = o[Symbol.asyncIterator], i;\r\n return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n return cooked;\r\n};\r\n\r\nvar __setModuleDefault = Object.create ? (function(o, v) {\r\n Object.defineProperty(o, \"default\", { enumerable: true, value: v });\r\n}) : function(o, v) {\r\n o[\"default\"] = v;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n if (mod && mod.__esModule) return mod;\r\n var result = {};\r\n if (mod != null) for (var k in mod) if (k !== \"default\" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);\r\n __setModuleDefault(result, mod);\r\n return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n\r\nexport function __classPrivateFieldGet(receiver, state, kind, f) {\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a getter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot read private member from an object whose class did not declare it\");\r\n return kind === \"m\" ? f : kind === \"a\" ? f.call(receiver) : f ? f.value : state.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, state, value, kind, f) {\r\n if (kind === \"m\") throw new TypeError(\"Private method is not writable\");\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a setter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot write private member to an object whose class did not declare it\");\r\n return (kind === \"a\" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;\r\n}\r\n\r\nexport function __classPrivateFieldIn(state, receiver) {\r\n if (receiver === null || (typeof receiver !== \"object\" && typeof receiver !== \"function\")) throw new TypeError(\"Cannot use 'in' operator on non-object\");\r\n return typeof state === \"function\" ? receiver === state : state.has(receiver);\r\n}\r\n\r\nexport function __addDisposableResource(env, value, async) {\r\n if (value !== null && value !== void 0) {\r\n if (typeof value !== \"object\" && typeof value !== \"function\") throw new TypeError(\"Object expected.\");\r\n var dispose;\r\n if (async) {\r\n if (!Symbol.asyncDispose) throw new TypeError(\"Symbol.asyncDispose is not defined.\");\r\n dispose = value[Symbol.asyncDispose];\r\n }\r\n if (dispose === void 0) {\r\n if (!Symbol.dispose) throw new TypeError(\"Symbol.dispose is not defined.\");\r\n dispose = value[Symbol.dispose];\r\n }\r\n if (typeof dispose !== \"function\") throw new TypeError(\"Object not disposable.\");\r\n env.stack.push({ value: value, dispose: dispose, async: async });\r\n }\r\n else if (async) {\r\n env.stack.push({ async: true });\r\n }\r\n return value;\r\n}\r\n\r\nvar _SuppressedError = typeof SuppressedError === \"function\" ? SuppressedError : function (error, suppressed, message) {\r\n var e = new Error(message);\r\n return e.name = \"SuppressedError\", e.error = error, e.suppressed = suppressed, e;\r\n};\r\n\r\nexport function __disposeResources(env) {\r\n function fail(e) {\r\n env.error = env.hasError ? new _SuppressedError(e, env.error, \"An error was suppressed during disposal.\") : e;\r\n env.hasError = true;\r\n }\r\n function next() {\r\n while (env.stack.length) {\r\n var rec = env.stack.pop();\r\n try {\r\n var result = rec.dispose && rec.dispose.call(rec.value);\r\n if (rec.async) return Promise.resolve(result).then(next, function(e) { fail(e); return next(); });\r\n }\r\n catch (e) {\r\n fail(e);\r\n }\r\n }\r\n if (env.hasError) throw env.error;\r\n }\r\n return next();\r\n}\r\n\r\nexport default {\r\n __extends: __extends,\r\n __assign: __assign,\r\n __rest: __rest,\r\n __decorate: __decorate,\r\n __param: __param,\r\n __metadata: __metadata,\r\n __awaiter: __awaiter,\r\n __generator: __generator,\r\n __createBinding: __createBinding,\r\n __exportStar: __exportStar,\r\n __values: __values,\r\n __read: __read,\r\n __spread: __spread,\r\n __spreadArrays: __spreadArrays,\r\n __spreadArray: __spreadArray,\r\n __await: __await,\r\n __asyncGenerator: __asyncGenerator,\r\n __asyncDelegator: __asyncDelegator,\r\n __asyncValues: __asyncValues,\r\n __makeTemplateObject: __makeTemplateObject,\r\n __importStar: __importStar,\r\n __importDefault: __importDefault,\r\n __classPrivateFieldGet: __classPrivateFieldGet,\r\n __classPrivateFieldSet: __classPrivateFieldSet,\r\n __classPrivateFieldIn: __classPrivateFieldIn,\r\n __addDisposableResource: __addDisposableResource,\r\n __disposeResources: __disposeResources,\r\n};\r\n","import { reflectCall } from 'lib/helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport assert from '../../stub/assert';\n\ndeclare global {\n interface ArrayBuffer {\n readonly detached: boolean;\n\n transfer(): ArrayBuffer;\n }\n\n function structuredClone(value: T, options: { transfer: ArrayBuffer[] }): T;\n}\n\nexport function CreateArrayFromList(elements: T): T {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice() as T;\n}\n\nexport function CopyDataBlockBytes(dest: ArrayBuffer,\n destOffset: number,\n src: ArrayBuffer,\n srcOffset: number,\n n: number) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n\nexport let TransferArrayBuffer = (O: ArrayBuffer): ArrayBuffer => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n } else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n } else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n};\n\nexport function CanTransferArrayBuffer(O: ArrayBuffer): boolean {\n return !IsDetachedBuffer(O);\n}\n\nexport let IsDetachedBuffer = (O: ArrayBuffer): boolean => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n } else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n};\n\nexport function ArrayBufferSlice(buffer: ArrayBuffer, begin: number, end: number): ArrayBuffer {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n}\n\nexport type MethodName = {\n [P in keyof T]: T[P] extends Function | undefined ? P : never;\n}[keyof T];\n\nexport function GetMethod>(receiver: T, prop: K): T[K] | undefined {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n}\n\nexport interface SyncIteratorRecord {\n iterator: Iterator,\n nextMethod: Iterator['next'],\n done: boolean;\n}\n\nexport interface AsyncIteratorRecord {\n iterator: AsyncIterator,\n nextMethod: AsyncIterator['next'],\n done: boolean;\n}\n\nexport type SyncOrAsyncIteratorRecord = SyncIteratorRecord | AsyncIteratorRecord;\n\nexport function CreateAsyncFromSyncIterator(syncIteratorRecord: SyncIteratorRecord): AsyncIteratorRecord {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n}\n\n// Aligns with core-js/modules/es.symbol.async-iterator.js\nexport const SymbolAsyncIterator: (typeof Symbol)['asyncIterator'] =\n Symbol.asyncIterator ??\n Symbol.for?.('Symbol.asyncIterator') ??\n '@@asyncIterator';\n\nexport type SyncOrAsyncIterable = Iterable | AsyncIterable;\nexport type SyncOrAsyncIteratorMethod = () => (Iterator | AsyncIterator);\n\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint: 'async',\n method?: SyncOrAsyncIteratorMethod\n): AsyncIteratorRecord;\nfunction GetIterator(\n obj: Iterable,\n hint: 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncIteratorRecord;\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint = 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncOrAsyncIteratorRecord {\n assert(hint === 'sync' || hint === 'async');\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj as AsyncIterable, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj as Iterable, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj as Iterable, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n } else {\n method = GetMethod(obj as Iterable, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false } as SyncOrAsyncIteratorRecord;\n}\n\nexport { GetIterator };\n\nexport function IteratorNext(iteratorRecord: AsyncIteratorRecord): Promise> {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n}\n\nexport function IteratorComplete(\n iterResult: IteratorResult\n): iterResult is IteratorReturnResult {\n assert(typeIsObject(iterResult));\n return Boolean(iterResult.done);\n}\n\nexport function IteratorValue(iterResult: IteratorYieldResult): T {\n assert(typeIsObject(iterResult));\n return iterResult.value;\n}\n","/// \n\nimport { SymbolAsyncIterator } from '../../../lib/abstract-ops/ecmascript';\n\n// We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it.\nexport const AsyncIteratorPrototype: AsyncIterable = {\n // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( )\n // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator\n [SymbolAsyncIterator](this: AsyncIterator) {\n return this;\n }\n};\nObject.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false });\n","/// \n\nimport { ReadableStream } from '../readable-stream';\nimport {\n AcquireReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadableStreamDefaultReadResult,\n type ReadRequest\n} from './default-reader';\nimport { ReadableStreamReaderGenericCancel, ReadableStreamReaderGenericRelease } from './generic-reader';\nimport assert from '../../stub/assert';\nimport { AsyncIteratorPrototype } from '@@target/stub/async-iterator-prototype';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n queueMicrotask,\n transformPromiseWith\n} from '../helpers/webidl';\n\n/**\n * An async iterator returned by {@link ReadableStream.values}.\n *\n * @public\n */\nexport interface ReadableStreamAsyncIterator extends AsyncIterableIterator {\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nexport class ReadableStreamAsyncIteratorImpl {\n private readonly _reader: ReadableStreamDefaultReader;\n private readonly _preventCancel: boolean;\n private _ongoingPromise: Promise> | undefined = undefined;\n private _isFinished = false;\n\n constructor(reader: ReadableStreamDefaultReader, preventCancel: boolean) {\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n\n next(): Promise> {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n\n return(value: any): Promise> {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n\n private _nextSteps(): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n\n private _returnSteps(value: any): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n assert(reader._readRequests.length === 0);\n\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n}\n\ninterface ReadableStreamAsyncIteratorInstance extends ReadableStreamAsyncIterator {\n /** @interal */\n _asyncIteratorImpl: ReadableStreamAsyncIteratorImpl;\n\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nconst ReadableStreamAsyncIteratorPrototype: ReadableStreamAsyncIteratorInstance = {\n next(this: ReadableStreamAsyncIteratorInstance): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n\n return(this: ReadableStreamAsyncIteratorInstance, value: any): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n} as any;\nObject.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamAsyncIterator(stream: ReadableStream,\n preventCancel: boolean): ReadableStreamAsyncIterator {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator: ReadableStreamAsyncIteratorInstance = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n}\n\nfunction IsReadableStreamAsyncIterator(x: any): x is ReadableStreamAsyncIterator {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n\n try {\n // noinspection SuspiciousTypeOfGuard\n return (x as ReadableStreamAsyncIteratorInstance)._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n } catch {\n return false;\n }\n}\n\n// Helper functions for the ReadableStream.\n\nfunction streamAsyncIteratorBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN: typeof Number.isNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n};\n\nexport default NumberIsNaN;\n","import NumberIsNaN from '../../stub/number-isnan';\nimport { ArrayBufferSlice } from './ecmascript';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function IsNonNegativeNumber(v: number): boolean {\n if (typeof v !== 'number') {\n return false;\n }\n\n if (NumberIsNaN(v)) {\n return false;\n }\n\n if (v < 0) {\n return false;\n }\n\n return true;\n}\n\nexport function CloneAsUint8Array(O: NonShared): NonShared {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer) as NonShared;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsNonNegativeNumber } from './miscellaneous';\n\nexport interface QueueContainer {\n _queue: SimpleQueue;\n _queueTotalSize: number;\n}\n\nexport interface QueuePair {\n value: T;\n size: number;\n}\n\nexport function DequeueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.shift()!;\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n\n return pair.value;\n}\n\nexport function EnqueueValueWithSize(container: QueueContainer>, value: T, size: number) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n}\n\nexport function PeekQueueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.peek();\n return pair.value;\n}\n\nexport function ResetQueue(container: QueueContainer) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n}\n","export type TypedArray =\n | Int8Array\n | Uint8Array\n | Uint8ClampedArray\n | Int16Array\n | Uint16Array\n | Int32Array\n | Uint32Array\n | Float32Array\n | Float64Array;\n\nexport type NonShared = T & {\n buffer: ArrayBuffer;\n}\n\nexport interface ArrayBufferViewConstructor {\n new(buffer: ArrayBuffer, byteOffset: number, length?: number): T;\n\n readonly prototype: T;\n}\n\nexport interface TypedArrayConstructor extends ArrayBufferViewConstructor {\n readonly BYTES_PER_ELEMENT: number;\n}\n\nexport type DataViewConstructor = ArrayBufferViewConstructor;\n\nfunction isDataViewConstructor(ctor: Function): ctor is DataViewConstructor {\n return ctor === DataView;\n}\n\nexport function isDataView(view: ArrayBufferView): view is DataView {\n return isDataViewConstructor(view.constructor);\n}\n\nexport function arrayBufferViewElementSize(ctor: ArrayBufferViewConstructor): number {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return (ctor as unknown as TypedArrayConstructor).BYTES_PER_ELEMENT;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n IsReadableStreamDefaultReader,\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n ReadableStreamHasDefaultReader,\n type ReadRequest\n} from './default-reader';\nimport {\n ReadableStreamAddReadIntoRequest,\n ReadableStreamFulfillReadIntoRequest,\n ReadableStreamGetNumReadIntoRequests,\n ReadableStreamHasBYOBReader,\n type ReadIntoRequest\n} from './byob-reader';\nimport NumberIsInteger from '../../stub/number-isinteger';\nimport {\n IsReadableStreamLocked,\n type ReadableByteStream,\n ReadableStreamClose,\n ReadableStreamError\n} from '../readable-stream';\nimport type { ValidatedUnderlyingByteSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport {\n ArrayBufferSlice,\n CanTransferArrayBuffer,\n CopyDataBlockBytes,\n IsDetachedBuffer,\n TransferArrayBuffer\n} from '../abstract-ops/ecmascript';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\nimport { assertRequiredArgument, convertUnsignedLongLongWithEnforceRange } from '../validators/basic';\nimport {\n type ArrayBufferViewConstructor,\n arrayBufferViewElementSize,\n type NonShared,\n type TypedArrayConstructor\n} from '../helpers/array-buffer-view';\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nexport class ReadableStreamBYOBRequest {\n /** @internal */\n _associatedReadableByteStreamController!: ReadableByteStreamController;\n /** @internal */\n _view!: NonShared | null;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view(): ArrayBufferView | null {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n\n return this._view;\n }\n\n /**\n * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into\n * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer.\n *\n * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer\n * modifiable.\n */\n respond(bytesWritten: number): void;\n respond(bytesWritten: number | undefined): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(this._view!.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n\n assert(this._view!.byteLength > 0);\n assert(this._view!.buffer.byteLength > 0);\n\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n\n /**\n * Indicates to the associated readable byte stream that instead of writing into\n * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`,\n * which will be given to the consumer of the readable byte stream.\n *\n * After this method is called, `view` will be transferred and no longer modifiable.\n */\n respondWithNewView(view: ArrayBufferView): void;\n respondWithNewView(view: NonShared): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n}\n\ninterface ByteQueueElement {\n buffer: ArrayBuffer;\n byteOffset: number;\n byteLength: number;\n}\n\ntype PullIntoDescriptor = NonShared> =\n DefaultPullIntoDescriptor\n | BYOBPullIntoDescriptor;\n\ninterface DefaultPullIntoDescriptor {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: TypedArrayConstructor;\n readerType: 'default' | 'none';\n}\n\ninterface BYOBPullIntoDescriptor = NonShared> {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: ArrayBufferViewConstructor;\n readerType: 'byob' | 'none';\n}\n\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableByteStreamController {\n /** @internal */\n _controlledReadableByteStream!: ReadableByteStream;\n /** @internal */\n _queue!: SimpleQueue;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n /** @internal */\n _autoAllocateChunkSize: number | undefined;\n /** @internal */\n _byobRequest: ReadableStreamBYOBRequest | null;\n /** @internal */\n _pendingPullIntos!: SimpleQueue;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest(): ReadableStreamBYOBRequest | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n\n ReadableByteStreamControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk chunk in the controlled readable stream.\n * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown.\n */\n enqueue(chunk: ArrayBufferView): void;\n enqueue(chunk: NonShared): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n\n ReadableByteStreamControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n\n ResetQueue(this);\n\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest>): void {\n const stream = this._controlledReadableByteStream;\n assert(ReadableStreamHasDefaultReader(stream));\n\n if (this._queueTotalSize > 0) {\n assert(ReadableStreamGetNumReadRequests(stream) === 0);\n\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer: ArrayBuffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n } catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n\n const pullIntoDescriptor: DefaultPullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n}\n\nObject.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableByteStreamController.prototype.close, 'close');\nsetFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableByteStreamController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableByteStreamController.\n\nexport function IsReadableByteStreamController(x: any): x is ReadableByteStreamController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n\n return x instanceof ReadableByteStreamController;\n}\n\nfunction IsReadableStreamBYOBRequest(x: any): x is ReadableStreamBYOBRequest {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBRequest;\n}\n\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller: ReadableByteStreamController): void {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller: ReadableByteStreamController) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n}\n\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor>(\n stream: ReadableByteStream,\n pullIntoDescriptor: PullIntoDescriptor\n) {\n assert(stream._state !== 'errored');\n assert(pullIntoDescriptor.readerType !== 'none');\n\n let done = false;\n if (stream._state === 'closed') {\n assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);\n done = true;\n }\n\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView as unknown as NonShared, done);\n } else {\n assert(pullIntoDescriptor.readerType === 'byob');\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n}\n\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor>(\n pullIntoDescriptor: PullIntoDescriptor\n): T {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n\n assert(bytesFilled <= pullIntoDescriptor.byteLength);\n assert(bytesFilled % elementSize === 0);\n\n return new pullIntoDescriptor.viewConstructor(\n pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize) as T;\n}\n\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n}\n\nfunction ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n } catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n}\n\nfunction ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.readerType === 'none');\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n firstDescriptor.buffer,\n firstDescriptor.byteOffset,\n firstDescriptor.bytesFilled\n );\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n}\n\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller: ReadableByteStreamController,\n pullIntoDescriptor: PullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize,\n pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n\n const queue = controller._queue;\n\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n } else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n\n if (!ready) {\n assert(controller._queueTotalSize === 0);\n assert(pullIntoDescriptor.bytesFilled > 0);\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n }\n\n return ready;\n}\n\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller: ReadableByteStreamController,\n size: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);\n assert(controller._byobRequest === null);\n pullIntoDescriptor.bytesFilled += size;\n}\n\nfunction ReadableByteStreamControllerHandleQueueDrain(controller: ReadableByteStreamController) {\n assert(controller._controlledReadableByteStream._state === 'readable');\n\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n } else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n}\n\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller: ReadableByteStreamController) {\n if (controller._byobRequest === null) {\n return;\n }\n\n controller._byobRequest._associatedReadableByteStreamController = undefined!;\n controller._byobRequest._view = null!;\n controller._byobRequest = null;\n}\n\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller: ReadableByteStreamController) {\n assert(!controller._closeRequested);\n\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n assert(pullIntoDescriptor.readerType !== 'none');\n\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n ReadableByteStreamControllerCommitPullIntoDescriptor(\n controller._controlledReadableByteStream,\n pullIntoDescriptor\n );\n }\n }\n}\n\nfunction ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller: ReadableByteStreamController) {\n const reader = controller._controlledReadableByteStream._reader;\n assert(IsReadableStreamDefaultReader(reader));\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n}\n\nexport function ReadableByteStreamControllerPullInto>(\n controller: ReadableByteStreamController,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = controller._controlledReadableByteStream;\n\n const ctor = view.constructor as ArrayBufferViewConstructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n\n const { byteOffset, byteLength } = view;\n\n const minimumFill = min * elementSize;\n assert(minimumFill >= elementSize && minimumFill <= byteLength);\n assert(minimumFill % elementSize === 0);\n\n let buffer: ArrayBuffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n } catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n\n const pullIntoDescriptor: BYOBPullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInClosedState(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.bytesFilled % firstDescriptor.elementSize === 0);\n\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n}\n\nfunction ReadableByteStreamControllerRespondInReadableState(controller: ReadableByteStreamController,\n bytesWritten: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n pullIntoDescriptor.buffer,\n end - remainderSize,\n remainderSize\n );\n }\n\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInternal(controller: ReadableByteStreamController, bytesWritten: number) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n assert(CanTransferArrayBuffer(firstDescriptor.buffer));\n\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n assert(bytesWritten === 0);\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n } else {\n assert(state === 'readable');\n assert(bytesWritten > 0);\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerShiftPendingPullInto(\n controller: ReadableByteStreamController\n): PullIntoDescriptor {\n assert(controller._byobRequest === null);\n const descriptor = controller._pendingPullIntos.shift()!;\n return descriptor;\n}\n\nfunction ReadableByteStreamControllerShouldCallPull(controller: ReadableByteStreamController): boolean {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return false;\n }\n\n if (controller._closeRequested) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableByteStreamControllerClearAlgorithms(controller: ReadableByteStreamController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\n\nexport function ReadableByteStreamControllerClose(controller: ReadableByteStreamController) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n\n return;\n }\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n throw e;\n }\n }\n\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n}\n\nexport function ReadableByteStreamControllerEnqueue(\n controller: ReadableByteStreamController,\n chunk: NonShared\n) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError(\n 'The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk'\n );\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n assert(controller._pendingPullIntos.length === 0);\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n } else {\n assert(controller._queue.length === 0);\n if (controller._pendingPullIntos.length > 0) {\n assert(controller._pendingPullIntos.peek().readerType === 'default');\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView as NonShared, false);\n }\n } else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n } else {\n assert(!IsReadableStreamLocked(stream));\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableByteStreamControllerError(controller: ReadableByteStreamController, e: any) {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableByteStreamControllerFillReadRequestFromQueue(\n controller: ReadableByteStreamController,\n readRequest: ReadRequest>\n) {\n assert(controller._queueTotalSize > 0);\n\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view as NonShared);\n}\n\nexport function ReadableByteStreamControllerGetBYOBRequest(\n controller: ReadableByteStreamController\n): ReadableStreamBYOBRequest | null {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer,\n firstDescriptor.byteOffset + firstDescriptor.bytesFilled,\n firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n\n const byobRequest: ReadableStreamBYOBRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view as NonShared);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n}\n\nfunction ReadableByteStreamControllerGetDesiredSize(controller: ReadableByteStreamController): number | null {\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nexport function ReadableByteStreamControllerRespond(controller: ReadableByteStreamController, bytesWritten: number) {\n assert(controller._pendingPullIntos.length > 0);\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n}\n\nexport function ReadableByteStreamControllerRespondWithNewView(controller: ReadableByteStreamController,\n view: NonShared) {\n assert(controller._pendingPullIntos.length > 0);\n assert(!IsDetachedBuffer(view.buffer));\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (view.byteLength === 0) {\n throw new TypeError(\n 'The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'\n );\n }\n }\n\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n}\n\nexport function SetUpReadableByteStreamController(stream: ReadableByteStream,\n controller: ReadableByteStreamController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n autoAllocateChunkSize: number | undefined) {\n assert(stream._readableStreamController === undefined);\n if (autoAllocateChunkSize !== undefined) {\n assert(NumberIsInteger(autoAllocateChunkSize));\n assert(autoAllocateChunkSize > 0);\n }\n\n controller._controlledReadableByteStream = stream;\n\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._byobRequest = null;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._closeRequested = false;\n controller._started = false;\n\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n\n controller._pendingPullIntos = new SimpleQueue();\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableByteStreamControllerFromUnderlyingSource(\n stream: ReadableByteStream,\n underlyingByteSource: ValidatedUnderlyingByteSource,\n highWaterMark: number\n) {\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n\n SetUpReadableByteStreamController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize\n );\n}\n\nfunction SetUpReadableStreamBYOBRequest(request: ReadableStreamBYOBRequest,\n controller: ReadableByteStreamController,\n view: NonShared) {\n assert(IsReadableByteStreamController(controller));\n assert(typeof view === 'object');\n assert(ArrayBuffer.isView(view));\n assert(!IsDetachedBuffer(view.buffer));\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n}\n\n// Helper functions for the ReadableStreamBYOBRequest.\n\nfunction byobRequestBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n}\n\n// Helper functions for the ReadableByteStreamController.\n\nfunction byteStreamControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n}\n","import { assertDictionary, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from '../readable-stream/reader-options';\n\nexport function convertReaderOptions(options: ReadableStreamGetReaderOptions | null | undefined,\n context: string): ReadableStreamGetReaderOptions {\n assertDictionary(options, context);\n const mode = options?.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n}\n\nfunction convertReadableStreamReaderMode(mode: string, context: string): 'byob' {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n}\n\nexport function convertByobReadOptions(\n options: ReadableStreamBYOBReaderReadOptions | null | undefined,\n context: string\n): ValidatedReadableStreamBYOBReaderReadOptions {\n assertDictionary(options, context);\n const min = options?.min ?? 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(\n min,\n `${context} has member 'min' that`\n )\n };\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, type ReadableByteStream, type ReadableStream } from '../readable-stream';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamController,\n ReadableByteStreamControllerPullInto\n} from './byte-stream-controller';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\nimport { IsDetachedBuffer } from '../abstract-ops/ecmascript';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from './reader-options';\nimport { convertByobReadOptions } from '../validators/reader-options';\nimport { isDataView, type NonShared, type TypedArray } from '../helpers/array-buffer-view';\n\n/**\n * A result returned by {@link ReadableStreamBYOBReader.read}.\n *\n * @public\n */\nexport type ReadableStreamBYOBReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value: T | undefined;\n};\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamBYOBReader(stream: ReadableByteStream): ReadableStreamBYOBReader {\n return new ReadableStreamBYOBReader(stream as ReadableStream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadIntoRequest>(\n stream: ReadableByteStream,\n readIntoRequest: ReadIntoRequest\n): void {\n assert(IsReadableStreamBYOBReader(stream._reader));\n assert(stream._state === 'readable' || stream._state === 'closed');\n\n (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);\n}\n\nexport function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,\n chunk: ArrayBufferView,\n done: boolean) {\n const reader = stream._reader as ReadableStreamBYOBReader;\n\n assert(reader._readIntoRequests.length > 0);\n\n const readIntoRequest = reader._readIntoRequests.shift()!;\n if (done) {\n readIntoRequest._closeSteps(chunk);\n } else {\n readIntoRequest._chunkSteps(chunk);\n }\n}\n\nexport function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {\n return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;\n}\n\nexport function ReadableStreamHasBYOBReader(stream: ReadableByteStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadIntoRequest> {\n _chunkSteps(chunk: T): void;\n\n _closeSteps(chunk: T | undefined): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamBYOBReader {\n /** @internal */\n _ownerReadableStream!: ReadableByteStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readIntoRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readIntoRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Attempts to reads bytes into view, and returns a promise resolved with the result.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(\n view: T,\n options?: ReadableStreamBYOBReaderReadOptions\n ): Promise>;\n read>(\n view: T,\n rawOptions: ReadableStreamBYOBReaderReadOptions | null | undefined = {}\n ): Promise> {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n\n let options: ValidatedReadableStreamBYOBReaderReadOptions;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > (view as unknown as TypedArray).length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n } else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamBYOBReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest: ReadIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamBYOBReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBReader;\n}\n\nexport function ReadableStreamBYOBReaderRead>(\n reader: ReadableStreamBYOBReader,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n } else {\n ReadableByteStreamControllerPullInto(\n stream._readableStreamController as ReadableByteStreamController,\n view,\n min,\n readIntoRequest\n );\n }\n}\n\nexport function ReadableStreamBYOBReaderRelease(reader: ReadableStreamBYOBReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n}\n\nexport function ReadableStreamBYOBReaderErrorReadIntoRequests(reader: ReadableStreamBYOBReader, e: any) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamBYOBReader.\n\nfunction byobReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport NumberIsNaN from '../../stub/number-isnan';\n\nexport function ExtractHighWaterMark(strategy: QueuingStrategy, defaultHWM: number): number {\n const { highWaterMark } = strategy;\n\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n\n return highWaterMark;\n}\n\nexport function ExtractSizeAlgorithm(strategy: QueuingStrategy): QueuingStrategySizeCallback {\n const { size } = strategy;\n\n if (!size) {\n return () => 1;\n }\n\n return size;\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport { assertDictionary, assertFunction, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategy(init: QueuingStrategy | null | undefined,\n context: string): QueuingStrategy {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n const size = init?.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n}\n\nfunction convertQueuingStrategySize(fn: QueuingStrategySizeCallback,\n context: string): QueuingStrategySizeCallback {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from '../writable-stream/underlying-sink';\nimport { WritableStreamDefaultController } from '../writable-stream';\n\nexport function convertUnderlyingSink(original: UnderlyingSink | null,\n context: string): ValidatedUnderlyingSink {\n assertDictionary(original, context);\n const abort = original?.abort;\n const close = original?.close;\n const start = original?.start;\n const type = original?.type;\n const write = original?.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original!, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original!, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original!, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original!, `${context} has member 'write' that`),\n type\n };\n}\n\nfunction convertUnderlyingSinkAbortCallback(\n fn: UnderlyingSinkAbortCallback,\n original: UnderlyingSink,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSinkCloseCallback(\n fn: UnderlyingSinkCloseCallback,\n original: UnderlyingSink,\n context: string\n): () => Promise {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n}\n\nfunction convertUnderlyingSinkStartCallback(\n fn: UnderlyingSinkStartCallback,\n original: UnderlyingSink,\n context: string\n): UnderlyingSinkStartCallback {\n assertFunction(fn, context);\n return (controller: WritableStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSinkWriteCallback(\n fn: UnderlyingSinkWriteCallback,\n original: UnderlyingSink,\n context: string\n): (chunk: W, controller: WritableStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: W, controller: WritableStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n","import { IsWritableStream, WritableStream } from '../writable-stream';\n\nexport function assertWritableStream(x: unknown, context: string): asserts x is WritableStream {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n}\n","/**\n * A signal object that allows you to communicate with a request and abort it if required\n * via its associated `AbortController` object.\n *\n * @remarks\n * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @public\n */\nexport interface AbortSignal {\n /**\n * Whether the request is aborted.\n */\n readonly aborted: boolean;\n\n /**\n * If aborted, returns the reason for aborting.\n */\n readonly reason?: any;\n\n /**\n * Add an event listener to be triggered when this signal becomes aborted.\n */\n addEventListener(type: 'abort', listener: () => void): void;\n\n /**\n * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}.\n */\n removeEventListener(type: 'abort', listener: () => void): void;\n}\n\nexport function isAbortSignal(value: unknown): value is AbortSignal {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof (value as AbortSignal).aborted === 'boolean';\n } catch {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n}\n\n/**\n * A controller object that allows you to abort an `AbortSignal` when desired.\n *\n * @remarks\n * This interface is compatible with the `AbortController` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @internal\n */\nexport interface AbortController {\n readonly signal: AbortSignal;\n\n abort(reason?: any): void;\n}\n\ninterface AbortControllerConstructor {\n new(): AbortController;\n}\n\nconst supportsAbortController = typeof (AbortController as any) === 'function';\n\n/**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\nexport function createAbortController(): AbortController | undefined {\n if (supportsAbortController) {\n return new (AbortController as AbortControllerConstructor)();\n }\n return undefined;\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponPromise\n} from './helpers/webidl';\nimport {\n DequeueValue,\n EnqueueValueWithSize,\n PeekQueueValue,\n type QueuePair,\n ResetQueue\n} from './abstract-ops/queue-with-sizes';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { SimpleQueue } from './simple-queue';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { AbortSteps, ErrorSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from './writable-stream/underlying-sink';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertUnderlyingSink } from './validators/underlying-sink';\nimport { assertWritableStream } from './validators/writable-stream';\nimport { type AbortController, type AbortSignal, createAbortController } from './abort-signal';\n\ntype WritableStreamState = 'writable' | 'closed' | 'erroring' | 'errored';\n\ninterface WriteOrCloseRequest {\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n}\n\ntype WriteRequest = WriteOrCloseRequest;\ntype CloseRequest = WriteOrCloseRequest;\n\ninterface PendingAbortRequest {\n _promise: Promise;\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n _reason: any;\n _wasAlreadyErroring: boolean;\n}\n\n/**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\nclass WritableStream {\n /** @internal */\n _state!: WritableStreamState;\n /** @internal */\n _storedError: any;\n /** @internal */\n _writer: WritableStreamDefaultWriter | undefined;\n /** @internal */\n _writableStreamController!: WritableStreamDefaultController;\n /** @internal */\n _writeRequests!: SimpleQueue;\n /** @internal */\n _inFlightWriteRequest: WriteRequest | undefined;\n /** @internal */\n _closeRequest: CloseRequest | undefined;\n /** @internal */\n _inFlightCloseRequest: CloseRequest | undefined;\n /** @internal */\n _pendingAbortRequest: PendingAbortRequest | undefined;\n /** @internal */\n _backpressure!: boolean;\n\n constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSink: UnderlyingSink | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n } else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n\n InitializeWritableStream(this);\n\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked(): boolean {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsWritableStreamLocked(this);\n }\n\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('abort'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n\n return WritableStreamAbort(this, reason);\n }\n\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('close'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamClose(this);\n }\n\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter(): WritableStreamDefaultWriter {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('getWriter');\n }\n\n return AcquireWritableStreamDefaultWriter(this);\n }\n}\n\nObject.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(WritableStream.prototype.abort, 'abort');\nsetFunctionName(WritableStream.prototype.close, 'close');\nsetFunctionName(WritableStream.prototype.getWriter, 'getWriter');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n}\n\nexport {\n AcquireWritableStreamDefaultWriter,\n CreateWritableStream,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamDefaultControllerErrorIfNeeded,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite,\n WritableStreamCloseQueuedOrInFlight\n};\n\nexport type {\n UnderlyingSink,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkAbortCallback\n};\n\n// Abstract operations for the WritableStream.\n\nfunction AcquireWritableStreamDefaultWriter(stream: WritableStream): WritableStreamDefaultWriter {\n return new WritableStreamDefaultWriter(stream);\n}\n\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: WritableStream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n\n const controller: WritableStreamDefaultController = Object.create(WritableStreamDefaultController.prototype);\n\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm,\n abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n}\n\nfunction InitializeWritableStream(stream: WritableStream) {\n stream._state = 'writable';\n\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n\n stream._writer = undefined;\n\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined!;\n\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n}\n\nfunction IsWritableStream(x: unknown): x is WritableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n\n return x instanceof WritableStream;\n}\n\nfunction IsWritableStreamLocked(stream: WritableStream): boolean {\n assert(IsWritableStream(stream));\n\n if (stream._writer === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamAbort(stream: WritableStream, reason: any): Promise {\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n stream._writableStreamController._abortController?.abort(reason);\n\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state as WritableStreamState;\n\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined!,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest!._promise = promise;\n\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n\n return promise;\n}\n\nfunction WritableStreamClose(stream: WritableStream): Promise {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(\n `The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n\n assert(state === 'writable' || state === 'erroring');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const promise = newPromise((resolve, reject) => {\n const closeRequest: CloseRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._closeRequest = closeRequest;\n });\n\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n\n return promise;\n}\n\n// WritableStream API exposed for controllers.\n\nfunction WritableStreamAddWriteRequest(stream: WritableStream): Promise {\n assert(IsWritableStreamLocked(stream));\n assert(stream._state === 'writable');\n\n const promise = newPromise((resolve, reject) => {\n const writeRequest: WriteRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._writeRequests.push(writeRequest);\n });\n\n return promise;\n}\n\nfunction WritableStreamDealWithRejection(stream: WritableStream, error: any) {\n const state = stream._state;\n\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n\n assert(state === 'erroring');\n WritableStreamFinishErroring(stream);\n}\n\nfunction WritableStreamStartErroring(stream: WritableStream, reason: any) {\n assert(stream._storedError === undefined);\n assert(stream._state === 'writable');\n\n const controller = stream._writableStreamController;\n assert(controller !== undefined);\n\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n}\n\nfunction WritableStreamFinishErroring(stream: WritableStream) {\n assert(stream._state === 'erroring');\n assert(!WritableStreamHasOperationMarkedInFlight(stream));\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(\n promise,\n () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n },\n (reason: any) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n}\n\nfunction WritableStreamFinishInFlightWrite(stream: WritableStream) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n}\n\nfunction WritableStreamFinishInFlightWriteWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._reject(error);\n stream._inFlightWriteRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n WritableStreamDealWithRejection(stream, error);\n}\n\nfunction WritableStreamFinishInFlightClose(stream: WritableStream) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n\n const state = stream._state;\n\n assert(state === 'writable' || state === 'erroring');\n\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n\n stream._state = 'closed';\n\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n\n assert(stream._pendingAbortRequest === undefined);\n assert(stream._storedError === undefined);\n}\n\nfunction WritableStreamFinishInFlightCloseWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._reject(error);\n stream._inFlightCloseRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n}\n\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream: WritableStream): boolean {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamHasOperationMarkedInFlight(stream: WritableStream): boolean {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamMarkCloseRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightCloseRequest === undefined);\n assert(stream._closeRequest !== undefined);\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n}\n\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightWriteRequest === undefined);\n assert(stream._writeRequests.length !== 0);\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\n\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream: WritableStream) {\n assert(stream._state === 'errored');\n if (stream._closeRequest !== undefined) {\n assert(stream._inFlightCloseRequest === undefined);\n\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n}\n\nfunction WritableStreamUpdateBackpressure(stream: WritableStream, backpressure: boolean) {\n assert(stream._state === 'writable');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n } else {\n assert(!backpressure);\n\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n\n stream._backpressure = backpressure;\n}\n\n/**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\nexport class WritableStreamDefaultWriter {\n /** @internal */\n _ownerWritableStream: WritableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _closedPromiseState!: 'pending' | 'resolved' | 'rejected';\n /** @internal */\n _readyPromise!: Promise;\n /** @internal */\n _readyPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _readyPromise_reject?: (reason: any) => void;\n /** @internal */\n _readyPromiseState!: 'pending' | 'fulfilled' | 'rejected';\n\n constructor(stream: WritableStream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n\n this._ownerWritableStream = stream;\n stream._writer = this;\n\n const state = stream._state;\n\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n } else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n } else {\n assert(state === 'errored');\n\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize(): number | null {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n\n return this._readyPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamDefaultWriterClose(this);\n }\n\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock(): void {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return;\n }\n\n assert(stream._writer !== undefined);\n\n WritableStreamDefaultWriterRelease(this);\n }\n\n /**\n * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully,\n * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return\n * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes\n * errored before the writing process is initiated.\n *\n * Note that what \"success\" means is up to the underlying sink; it might indicate simply that the chunk has been\n * accepted, and not necessarily that it is safely saved to its ultimate destination.\n */\n write(chunk: W): Promise;\n write(chunk: W = undefined!): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n});\nsetFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\nsetFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\nsetFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\nsetFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n}\n\n// Abstract operations for the WritableStreamDefaultWriter.\n\nfunction IsWritableStreamDefaultWriter(x: any): x is WritableStreamDefaultWriter {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultWriter;\n}\n\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultWriterAbort(writer: WritableStreamDefaultWriter, reason: any) {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamAbort(stream, reason);\n}\n\nfunction WritableStreamDefaultWriterClose(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamClose(stream);\n}\n\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n return WritableStreamDefaultWriterClose(writer);\n}\n\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n } else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n } else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterGetDesiredSize(writer: WritableStreamDefaultWriter): number | null {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n\n if (state === 'closed') {\n return 0;\n }\n\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\n\nfunction WritableStreamDefaultWriterRelease(writer: WritableStreamDefaultWriter) {\n const stream = writer._ownerWritableStream;\n assert(stream !== undefined);\n assert(stream._writer === writer);\n\n const releasedError = new TypeError(\n `Writer was released and can no longer be used to monitor the stream's closedness`);\n\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n\n stream._writer = undefined;\n writer._ownerWritableStream = undefined!;\n}\n\nfunction WritableStreamDefaultWriterWrite(writer: WritableStreamDefaultWriter, chunk: W): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const controller = stream._writableStreamController;\n\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable');\n\n const promise = WritableStreamAddWriteRequest(stream);\n\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n\n return promise;\n}\n\nconst closeSentinel: unique symbol = {} as any;\n\ntype QueueRecord = W | typeof closeSentinel;\n\n/**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\nexport class WritableStreamDefaultController {\n /** @internal */\n _controlledWritableStream!: WritableStream;\n /** @internal */\n _queue!: SimpleQueue>>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _abortReason: any;\n /** @internal */\n _abortController: AbortController | undefined;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _writeAlgorithm!: (chunk: W) => Promise;\n /** @internal */\n _closeAlgorithm!: () => Promise;\n /** @internal */\n _abortAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason(): any {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('abortReason');\n }\n return this._abortReason;\n }\n\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal(): AbortSignal {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e: any = undefined): void {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n\n WritableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [AbortSteps](reason: any): Promise {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations implementing interface required by the WritableStream.\n\nfunction IsWritableStreamDefaultController(x: any): x is WritableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultController;\n}\n\nfunction SetUpWritableStreamDefaultController(stream: WritableStream,\n controller: WritableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(IsWritableStream(stream));\n assert(stream._writableStreamController === undefined);\n\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(\n startPromise,\n () => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n r => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n }\n );\n}\n\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream: WritableStream,\n underlyingSink: ValidatedUnderlyingSink,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let writeAlgorithm: (chunk: W) => Promise;\n let closeAlgorithm: () => Promise;\n let abortAlgorithm: (reason: any) => Promise;\n\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write!(chunk, controller);\n } else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close!();\n } else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort!(reason);\n } else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpWritableStreamDefaultController(\n stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\nfunction WritableStreamDefaultControllerClearAlgorithms(controller: WritableStreamDefaultController) {\n controller._writeAlgorithm = undefined!;\n controller._closeAlgorithm = undefined!;\n controller._abortAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\nfunction WritableStreamDefaultControllerClose(controller: WritableStreamDefaultController) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\nfunction WritableStreamDefaultControllerGetChunkSize(controller: WritableStreamDefaultController,\n chunk: W): number {\n try {\n return controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n}\n\nfunction WritableStreamDefaultControllerGetDesiredSize(controller: WritableStreamDefaultController): number {\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nfunction WritableStreamDefaultControllerWrite(controller: WritableStreamDefaultController,\n chunk: W,\n chunkSize: number) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\n// Abstract operations for the WritableStreamDefaultController.\n\nfunction WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n if (!controller._started) {\n return;\n }\n\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n\n const state = stream._state;\n assert(state !== 'closed' && state !== 'errored');\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n\n if (controller._queue.length === 0) {\n return;\n }\n\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n } else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n}\n\nfunction WritableStreamDefaultControllerErrorIfNeeded(controller: WritableStreamDefaultController, error: any) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n}\n\nfunction WritableStreamDefaultControllerProcessClose(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkCloseRequestInFlight(stream);\n\n DequeueValue(controller);\n assert(controller._queue.length === 0);\n\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(\n sinkClosePromise,\n () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n },\n reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerProcessWrite(controller: WritableStreamDefaultController, chunk: W) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(\n sinkWritePromise,\n () => {\n WritableStreamFinishInFlightWrite(stream);\n\n const state = stream._state;\n assert(state === 'writable' || state === 'erroring');\n\n DequeueValue(controller);\n\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerGetBackpressure(controller: WritableStreamDefaultController): boolean {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n}\n\n// A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultControllerError(controller: WritableStreamDefaultController, error: any) {\n const stream = controller._controlledWritableStream;\n\n assert(stream._state === 'writable');\n\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n}\n\n// Helper functions for the WritableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n}\n\n// Helper functions for the WritableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n}\n\n\n// Helper functions for the WritableStreamDefaultWriter.\n\nfunction defaultWriterBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n}\n\nfunction defaultWriterLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n}\n\nfunction defaultWriterClosedPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n}\n\nfunction defaultWriterClosedPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n}\n\nfunction defaultWriterClosedPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n}\n\nfunction defaultWriterClosedPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._closedPromise_resolve === undefined);\n assert(writer._closedPromise_reject === undefined);\n assert(writer._closedPromiseState !== 'pending');\n\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n}\n\nfunction defaultWriterReadyPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n}\n\nfunction defaultWriterReadyPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n}\n\nfunction defaultWriterReadyPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n}\n\nfunction defaultWriterReadyPromiseReset(writer: WritableStreamDefaultWriter) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitialize(writer);\n}\n\nfunction defaultWriterReadyPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n}\n","/// \n\nfunction getGlobals(): typeof globalThis | undefined {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n } else if (typeof self !== 'undefined') {\n return self;\n } else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n}\n\nexport const globals = getGlobals();\n","/// \nimport { globals } from '../globals';\nimport { setFunctionName } from '../lib/helpers/miscellaneous';\n\ninterface DOMException extends Error {\n name: string;\n message: string;\n}\n\ntype DOMExceptionConstructor = new (message?: string, name?: string) => DOMException;\n\nfunction isDOMExceptionConstructor(ctor: unknown): ctor is DOMExceptionConstructor {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if ((ctor as DOMExceptionConstructor).name !== 'DOMException') {\n return false;\n }\n try {\n new (ctor as DOMExceptionConstructor)();\n return true;\n } catch {\n return false;\n }\n}\n\n/**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\nfunction getFromGlobal(): DOMExceptionConstructor | undefined {\n const ctor = globals?.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n}\n\n/**\n * Support:\n * - All platforms\n */\nfunction createPolyfill(): DOMExceptionConstructor {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(this: DOMException, message?: string, name?: string) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n } as any;\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-redeclare\nconst DOMException: DOMExceptionConstructor = getFromGlobal() || createPolyfill();\n\nexport { DOMException };\n","import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';\nimport { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireWritableStreamDefaultWriter,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamCloseQueuedOrInFlight,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite\n} from '../writable-stream';\nimport assert from '../../stub/assert';\nimport {\n newPromise,\n PerformPromiseThen,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponFulfillment,\n uponPromise,\n uponRejection\n} from '../helpers/webidl';\nimport { noop } from '../../utils';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\nimport { DOMException } from '../../stub/dom-exception';\n\nexport function ReadableStreamPipeTo(source: ReadableStream,\n dest: WritableStream,\n preventClose: boolean,\n preventAbort: boolean,\n preventCancel: boolean,\n signal: AbortSignal | undefined): Promise {\n assert(IsReadableStream(source));\n assert(IsWritableStream(dest));\n assert(typeof preventClose === 'boolean');\n assert(typeof preventAbort === 'boolean');\n assert(typeof preventCancel === 'boolean');\n assert(signal === undefined || isAbortSignal(signal));\n assert(!IsReadableStreamLocked(source));\n assert(!IsWritableStreamLocked(dest));\n\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n\n source._disturbed = true;\n\n let shuttingDown = false;\n\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n\n return newPromise((resolve, reject) => {\n let abortAlgorithm: () => void;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions: Array<() => Promise> = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n\n signal.addEventListener('abort', abortAlgorithm);\n }\n\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done: boolean) {\n if (done) {\n resolveLoop();\n } else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n\n next(false);\n });\n }\n\n function pipeStep(): Promise {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(\n reader,\n {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n }\n );\n });\n });\n }\n\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n } else {\n shutdown();\n }\n return null;\n });\n\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n } else {\n shutdown(true, destClosed);\n }\n }\n\n setPromiseIsHandledToTrue(pipeLoop());\n\n function waitForWritesToFinish(): Promise {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(\n currentWrite,\n () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined\n );\n }\n\n function isOrBecomesErrored(stream: ReadableStream | WritableStream,\n promise: Promise,\n action: (reason: any) => null) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n } else {\n uponRejection(promise, action);\n }\n }\n\n function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise, action: () => null) {\n if (stream._state === 'closed') {\n action();\n } else {\n uponFulfillment(promise, action);\n }\n }\n\n function shutdownWithAction(action: () => Promise, originalIsError?: boolean, originalError?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n } else {\n doTheRest();\n }\n\n function doTheRest(): null {\n uponPromise(\n action(),\n () => finalize(originalIsError, originalError),\n newError => finalize(true, newError)\n );\n return null;\n }\n }\n\n function shutdown(isError?: boolean, error?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n } else {\n finalize(isError, error);\n }\n }\n\n function finalize(isError?: boolean, error?: any): null {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n } else {\n resolve(undefined);\n }\n\n return null;\n }\n });\n}\n","import type { QueuingStrategySizeCallback } from '../queuing-strategy';\nimport assert from '../../stub/assert';\nimport { DequeueValue, EnqueueValueWithSize, type QueuePair, ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n type ReadRequest\n} from './default-reader';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsReadableStreamLocked, ReadableStream, ReadableStreamClose, ReadableStreamError } from '../readable-stream';\nimport type { ValidatedUnderlyingSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\n\n/**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableStreamDefaultController {\n /** @internal */\n _controlledReadableStream!: ReadableStream;\n /** @internal */\n _queue!: SimpleQueue>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('close');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n\n ReadableStreamDefaultControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the controlled readable stream.\n */\n enqueue(chunk: R): void;\n enqueue(chunk: R = undefined!): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n ReadableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest): void {\n const stream = this._controlledReadableStream;\n\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n } else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n\n readRequest._chunkSteps(chunk);\n } else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n // Do nothing.\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\nsetFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableStreamDefaultController.\n\nfunction IsReadableStreamDefaultController(x: any): x is ReadableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultController;\n}\n\nfunction ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController): void {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController): boolean {\n const stream = controller._controlledReadableStream;\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\n// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n\nexport function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n controller._closeRequested = true;\n\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n}\n\nexport function ReadableStreamDefaultControllerEnqueue(\n controller: ReadableStreamDefaultController,\n chunk: R\n): void {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n } else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController, e: any) {\n const stream = controller._controlledReadableStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ResetQueue(controller);\n\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableStreamDefaultControllerGetDesiredSize(\n controller: ReadableStreamDefaultController\n): number | null {\n const state = controller._controlledReadableStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\n// This is used in the implementation of TransformStream.\nexport function ReadableStreamDefaultControllerHasBackpressure(\n controller: ReadableStreamDefaultController\n): boolean {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n\n return true;\n}\n\nexport function ReadableStreamDefaultControllerCanCloseOrEnqueue(\n controller: ReadableStreamDefaultController\n): boolean {\n const state = controller._controlledReadableStream._state;\n\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n\n return false;\n}\n\nexport function SetUpReadableStreamDefaultController(stream: ReadableStream,\n controller: ReadableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(stream._readableStreamController === undefined);\n\n controller._controlledReadableStream = stream;\n\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n stream: ReadableStream,\n underlyingSource: ValidatedUnderlyingSource,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback\n) {\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// Helper functions for the ReadableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n}\n","import {\n CreateReadableByteStream,\n CreateReadableStream,\n type DefaultReadableStream,\n IsReadableStream,\n type ReadableByteStream,\n ReadableStream,\n ReadableStreamCancel,\n type ReadableStreamReader\n} from '../readable-stream';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadRequest\n} from './default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReaderRead,\n type ReadIntoRequest\n} from './byob-reader';\nimport assert from '../../stub/assert';\nimport { newPromise, promiseResolvedWith, queueMicrotask, uponRejection } from '../helpers/webidl';\nimport {\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError\n} from './default-controller';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamControllerClose,\n ReadableByteStreamControllerEnqueue,\n ReadableByteStreamControllerError,\n ReadableByteStreamControllerGetBYOBRequest,\n ReadableByteStreamControllerRespond,\n ReadableByteStreamControllerRespondWithNewView\n} from './byte-stream-controller';\nimport { CreateArrayFromList } from '../abstract-ops/ecmascript';\nimport { CloneAsUint8Array } from '../abstract-ops/miscellaneous';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function ReadableStreamTee(stream: ReadableStream,\n cloneForBranch2: boolean): [ReadableStream, ReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream as unknown as ReadableByteStream) as\n unknown as [ReadableStream, ReadableStream];\n }\n return ReadableStreamDefaultTee(stream, cloneForBranch2);\n}\n\nexport function ReadableStreamDefaultTee(\n stream: ReadableStream,\n cloneForBranch2: boolean\n): [DefaultReadableStream, DefaultReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n\n const reader = AcquireReadableStreamDefaultReader(stream);\n\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: DefaultReadableStream;\n let branch2: DefaultReadableStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function pullAlgorithm(): Promise {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm() {\n // do nothing\n }\n\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n\n uponRejection(reader._closedPromise, (r: any) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n\n return [branch1, branch2];\n}\n\nexport function ReadableByteStreamTee(stream: ReadableByteStream): [ReadableByteStream, ReadableByteStream] {\n assert(IsReadableStream(stream));\n assert(IsReadableByteStreamController(stream._readableStreamController));\n\n let reader: ReadableStreamReader> = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: ReadableByteStream;\n let branch2: ReadableByteStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function forwardReaderError(thisReader: ReadableStreamReader>) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n assert(reader._readIntoRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n\n const readRequest: ReadRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n\n function pullWithBYOBReader(view: NonShared, forBranch2: boolean) {\n if (IsReadableStreamDefaultReader>(reader)) {\n assert(reader._readRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n\n const readIntoRequest: ReadIntoRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n } else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n\n if (chunk !== undefined) {\n assert(chunk.byteLength === 0);\n\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n\n function pull1Algorithm(): Promise {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, false);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function pull2Algorithm(): Promise {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, true);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm(): void {\n return;\n }\n\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n\n forwardReaderError(reader);\n\n return [branch1, branch2];\n}\n","import { typeIsObject } from '../helpers/miscellaneous';\nimport type { ReadableStreamDefaultReadResult } from './default-reader';\n\n/**\n * A common interface for a `ReadadableStream` implementation.\n *\n * @public\n */\nexport interface ReadableStreamLike {\n readonly locked: boolean;\n\n getReader(): ReadableStreamDefaultReaderLike;\n}\n\n/**\n * A common interface for a `ReadableStreamDefaultReader` implementation.\n *\n * @public\n */\nexport interface ReadableStreamDefaultReaderLike {\n readonly closed: Promise;\n\n cancel(reason?: any): Promise;\n\n read(): Promise>;\n\n releaseLock(): void;\n}\n\nexport function isReadableStreamLike(stream: unknown): stream is ReadableStreamLike {\n return typeIsObject(stream) && typeof (stream as ReadableStreamLike).getReader !== 'undefined';\n}\n","import { CreateReadableStream, type DefaultReadableStream } from '../readable-stream';\nimport {\n isReadableStreamLike,\n type ReadableStreamDefaultReaderLike,\n type ReadableStreamLike\n} from './readable-stream-like';\nimport { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue } from './default-controller';\nimport { GetIterator, GetMethod, IteratorComplete, IteratorNext, IteratorValue } from '../abstract-ops/ecmascript';\nimport { promiseRejectedWith, promiseResolvedWith, reflectCall, transformPromiseWith } from '../helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport { noop } from '../../utils';\n\nexport function ReadableStreamFrom(\n source: Iterable | AsyncIterable | ReadableStreamLike\n): DefaultReadableStream {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n}\n\nexport function ReadableStreamFromIterable(asyncIterable: Iterable | AsyncIterable): DefaultReadableStream {\n let stream: DefaultReadableStream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n const iterator = iteratorRecord.iterator;\n let returnMethod: (typeof iterator)['return'] | undefined;\n try {\n returnMethod = GetMethod(iterator, 'return');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult: IteratorResult | Promise>;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n\nexport function ReadableStreamFromDefaultReader(\n reader: ReadableStreamDefaultReaderLike\n): DefaultReadableStream {\n let stream: DefaultReadableStream;\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let readPromise;\n try {\n readPromise = reader.read();\n } catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n } catch (e) {\n return promiseRejectedWith(e);\n }\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n","import { assertDictionary, assertFunction, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamController,\n UnderlyingByteSource,\n UnderlyingDefaultOrByteSource,\n UnderlyingDefaultOrByteSourcePullCallback,\n UnderlyingDefaultOrByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n ValidatedUnderlyingDefaultOrByteSource\n} from '../readable-stream/underlying-source';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\n\nexport function convertUnderlyingDefaultOrByteSource(\n source: UnderlyingSource | UnderlyingByteSource | null,\n context: string\n): ValidatedUnderlyingDefaultOrByteSource {\n assertDictionary(source, context);\n const original = source as (UnderlyingDefaultOrByteSource | null);\n const autoAllocateChunkSize = original?.autoAllocateChunkSize;\n const cancel = original?.cancel;\n const pull = original?.pull;\n const start = original?.start;\n const type = original?.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(\n autoAllocateChunkSize,\n `${context} has member 'autoAllocateChunkSize' that`\n ),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original!, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original!, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n}\n\nfunction convertUnderlyingSourceCancelCallback(\n fn: UnderlyingSourceCancelCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSourcePullCallback(\n fn: UnderlyingDefaultOrByteSourcePullCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (controller: ReadableStreamController) => Promise {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSourceStartCallback(\n fn: UnderlyingDefaultOrByteSourceStartCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): UnderlyingDefaultOrByteSourceStartCallback {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertReadableStreamType(type: string, context: string): 'bytes' {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n}\n","import { assertDictionary } from './basic';\nimport type {\n ReadableStreamIteratorOptions,\n ValidatedReadableStreamIteratorOptions\n} from '../readable-stream/iterator-options';\n\nexport function convertIteratorOptions(options: ReadableStreamIteratorOptions | null | undefined,\n context: string): ValidatedReadableStreamIteratorOptions {\n assertDictionary(options, context);\n const preventCancel = options?.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n}\n","import { assertDictionary } from './basic';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from '../readable-stream/pipe-options';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\n\nexport function convertPipeOptions(options: StreamPipeOptions | null | undefined,\n context: string): ValidatedStreamPipeOptions {\n assertDictionary(options, context);\n const preventAbort = options?.preventAbort;\n const preventCancel = options?.preventCancel;\n const preventClose = options?.preventClose;\n const signal = options?.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n}\n\nfunction assertAbortSignal(signal: unknown, context: string): asserts signal is AbortSignal {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n}\n","import { assertDictionary, assertRequiredField } from './basic';\nimport { ReadableStream } from '../readable-stream';\nimport { WritableStream } from '../writable-stream';\nimport { assertReadableStream } from './readable-stream';\nimport { assertWritableStream } from './writable-stream';\n\nexport function convertReadableWritablePair(\n pair: { readable: RS; writable: WS } | null | undefined,\n context: string\n): { readable: RS; writable: WS } {\n assertDictionary(pair, context);\n\n const readable = pair?.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n\n const writable = pair?.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n\n return { readable, writable };\n}\n","import assert from '../stub/assert';\nimport {\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith\n} from './helpers/webidl';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { AcquireReadableStreamAsyncIterator, type ReadableStreamAsyncIterator } from './readable-stream/async-iterator';\nimport { defaultReaderClosedPromiseReject, defaultReaderClosedPromiseResolve } from './readable-stream/generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderErrorReadRequests,\n type ReadableStreamDefaultReadResult\n} from './readable-stream/default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBReaderErrorReadIntoRequests,\n type ReadableStreamBYOBReadResult\n} from './readable-stream/byob-reader';\nimport { ReadableStreamPipeTo } from './readable-stream/pipe';\nimport { ReadableStreamTee } from './readable-stream/tee';\nimport { ReadableStreamFrom } from './readable-stream/from';\nimport { IsWritableStream, IsWritableStreamLocked, WritableStream } from './writable-stream';\nimport { SimpleQueue } from './simple-queue';\nimport {\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n SetUpReadableByteStreamController,\n SetUpReadableByteStreamControllerFromUnderlyingSource\n} from './readable-stream/byte-stream-controller';\nimport {\n ReadableStreamDefaultController,\n SetUpReadableStreamDefaultController,\n SetUpReadableStreamDefaultControllerFromUnderlyingSource\n} from './readable-stream/default-controller';\nimport type {\n UnderlyingByteSource,\n UnderlyingByteSourcePullCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceStartCallback\n} from './readable-stream/underlying-source';\nimport { noop } from '../utils';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { CreateArrayFromList, SymbolAsyncIterator } from './abstract-ops/ecmascript';\nimport { CancelSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertUnderlyingDefaultOrByteSource } from './validators/underlying-source';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions\n} from './readable-stream/reader-options';\nimport { convertReaderOptions } from './validators/reader-options';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from './readable-stream/pipe-options';\nimport type { ReadableStreamIteratorOptions } from './readable-stream/iterator-options';\nimport { convertIteratorOptions } from './validators/iterator-options';\nimport { convertPipeOptions } from './validators/pipe-options';\nimport type { ReadableWritablePair } from './readable-stream/readable-writable-pair';\nimport { convertReadableWritablePair } from './validators/readable-writable-pair';\nimport type { ReadableStreamDefaultReaderLike, ReadableStreamLike } from './readable-stream/readable-stream-like';\nimport type { NonShared } from './helpers/array-buffer-view';\n\nexport type DefaultReadableStream = ReadableStream & {\n _readableStreamController: ReadableStreamDefaultController\n};\n\nexport type ReadableByteStream = ReadableStream> & {\n _readableStreamController: ReadableByteStreamController\n};\n\ntype ReadableStreamState = 'readable' | 'closed' | 'errored';\n\n/**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\nexport class ReadableStream implements AsyncIterable {\n /** @internal */\n _state!: ReadableStreamState;\n /** @internal */\n _reader: ReadableStreamReader | undefined;\n /** @internal */\n _storedError: any;\n /** @internal */\n _disturbed!: boolean;\n /** @internal */\n _readableStreamController!: ReadableStreamDefaultController | ReadableByteStreamController;\n\n constructor(underlyingSource: UnderlyingByteSource, strategy?: { highWaterMark?: number; size?: undefined });\n constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSource: UnderlyingSource | UnderlyingByteSource | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n } else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n\n InitializeReadableStream(this);\n\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(\n this as unknown as ReadableByteStream,\n underlyingSource,\n highWaterMark\n );\n } else {\n assert(underlyingSource.type === undefined);\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n this,\n underlyingSource,\n highWaterMark,\n sizeAlgorithm\n );\n }\n }\n\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked(): boolean {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsReadableStreamLocked(this);\n }\n\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('cancel'));\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n\n return ReadableStreamCancel(this, reason);\n }\n\n /**\n * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader.\n *\n * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams,\n * i.e. streams which were constructed specifically with the ability to handle \"bring your own buffer\" reading.\n * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its\n * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise\n * control over allocation.\n */\n getReader({ mode }: { mode: 'byob' }): ReadableStreamBYOBReader;\n /**\n * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader.\n * While the stream is locked, no other reader can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to consume a stream\n * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours\n * or cancel the stream, which would interfere with your abstraction.\n */\n getReader(): ReadableStreamDefaultReader;\n getReader(\n rawOptions: ReadableStreamGetReaderOptions | null | undefined = undefined\n ): ReadableStreamDefaultReader | ReadableStreamBYOBReader {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('getReader');\n }\n\n const options = convertReaderOptions(rawOptions, 'First parameter');\n\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n\n assert(options.mode === 'byob');\n return AcquireReadableStreamBYOBReader(this as unknown as ReadableByteStream);\n }\n\n /**\n * Provides a convenient, chainable way of piping this readable stream through a transform stream\n * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream\n * into the writable side of the supplied pair, and returns the readable side for further use.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeThrough(\n transform: { readable: RS; writable: WritableStream },\n options?: StreamPipeOptions\n ): RS;\n pipeThrough(\n rawTransform: { readable: RS; writable: WritableStream } | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}\n ): RS {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n\n const promise = ReadableStreamPipeTo(\n this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n\n setPromiseIsHandledToTrue(promise);\n\n return transform.readable;\n }\n\n /**\n * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under\n * various error conditions can be customized with a number of passed options. It returns a promise that fulfills\n * when the piping process completes successfully, or rejects if any errors were encountered.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise;\n pipeTo(destination: WritableStream | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('pipeTo'));\n }\n\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(\n new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)\n );\n }\n\n let options: ValidatedStreamPipeOptions;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')\n );\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')\n );\n }\n\n return ReadableStreamPipeTo(\n this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n }\n\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee(): [ReadableStream, ReadableStream] {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('tee');\n }\n\n const branches = ReadableStreamTee(this, false);\n return CreateArrayFromList(branches);\n }\n\n /**\n * Asynchronously iterates over the chunks in the stream's internal queue.\n *\n * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader.\n * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method\n * is called, e.g. by breaking out of the loop.\n *\n * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also\n * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing\n * `true` for the `preventCancel` option.\n */\n values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n values(rawOptions: ReadableStreamIteratorOptions | null | undefined = undefined): ReadableStreamAsyncIterator {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('values');\n }\n\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n\n /**\n * {@inheritDoc ReadableStream.values}\n */\n [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n\n [SymbolAsyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator {\n // Stub implementation, overridden below\n return this.values(options);\n }\n\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream {\n return ReadableStreamFrom(asyncIterable);\n }\n}\n\nObject.defineProperties(ReadableStream, {\n from: { enumerable: true }\n});\nObject.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(ReadableStream.from, 'from');\nsetFunctionName(ReadableStream.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStream.prototype.getReader, 'getReader');\nsetFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\nsetFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\nsetFunctionName(ReadableStream.prototype.tee, 'tee');\nsetFunctionName(ReadableStream.prototype.values, 'values');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n}\nObject.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n});\n\nexport type {\n ReadableStreamAsyncIterator,\n ReadableStreamDefaultReadResult,\n ReadableStreamBYOBReadResult,\n ReadableStreamBYOBReaderReadOptions,\n UnderlyingByteSource,\n UnderlyingSource,\n UnderlyingSourceStartCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceCancelCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingByteSourcePullCallback,\n StreamPipeOptions,\n ReadableWritablePair,\n ReadableStreamIteratorOptions,\n ReadableStreamLike,\n ReadableStreamDefaultReaderLike\n};\n\n// Abstract operations for the ReadableStream.\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1\n): DefaultReadableStream {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: DefaultReadableStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n\n return stream;\n}\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableByteStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise\n): ReadableByteStream {\n const stream: ReadableByteStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n\n return stream;\n}\n\nfunction InitializeReadableStream(stream: ReadableStream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n}\n\nexport function IsReadableStream(x: unknown): x is ReadableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStream;\n}\n\nexport function IsReadableStreamDisturbed(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n return stream._disturbed;\n}\n\nexport function IsReadableStreamLocked(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n if (stream._reader === undefined) {\n return false;\n }\n\n return true;\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamCancel(stream: ReadableStream, reason: any): Promise {\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n ReadableStreamClose(stream);\n\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n}\n\nexport function ReadableStreamClose(stream: ReadableStream): void {\n assert(stream._state === 'readable');\n\n stream._state = 'closed';\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseResolve(reader);\n\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n}\n\nexport function ReadableStreamError(stream: ReadableStream, e: any): void {\n assert(IsReadableStream(stream));\n assert(stream._state === 'readable');\n\n stream._state = 'errored';\n stream._storedError = e;\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseReject(reader, e);\n\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n } else {\n assert(IsReadableStreamBYOBReader(reader));\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n}\n\n// Readers\n\nexport type ReadableStreamReader = ReadableStreamDefaultReader | ReadableStreamBYOBReader;\n\nexport {\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader\n};\n\n// Controllers\n\nexport {\n ReadableStreamDefaultController,\n ReadableStreamBYOBRequest,\n ReadableByteStreamController\n};\n\n// Helper functions for the ReadableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n}\n","import type { QueuingStrategyInit } from '../queuing-strategy';\nimport { assertDictionary, assertRequiredField, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategyInit(init: QueuingStrategyInit | null | undefined,\n context: string): QueuingStrategyInit {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst byteLengthSizeFunction = (chunk: ArrayBufferView): number => {\n return chunk.byteLength;\n};\nsetFunctionName(byteLengthSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\nexport default class ByteLengthQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _byteLengthQueuingStrategyHighWaterMark: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size(): (chunk: ArrayBufferView) => number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n}\n\nObject.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the ByteLengthQueuingStrategy.\n\nfunction byteLengthBrandCheckException(name: string): TypeError {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n}\n\nexport function IsByteLengthQueuingStrategy(x: any): x is ByteLengthQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof ByteLengthQueuingStrategy;\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst countSizeFunction = (): 1 => {\n return 1;\n};\nsetFunctionName(countSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\nexport default class CountQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _countQueuingStrategyHighWaterMark!: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size(): (chunk: any) => 1 {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n}\n\nObject.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the CountQueuingStrategy.\n\nfunction countBrandCheckException(name: string): TypeError {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n}\n\nexport function IsCountQueuingStrategy(x: any): x is CountQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof CountQueuingStrategy;\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from '../transform-stream/transformer';\nimport { TransformStreamDefaultController } from '../transform-stream';\n\nexport function convertTransformer(original: Transformer | null,\n context: string): ValidatedTransformer {\n assertDictionary(original, context);\n const cancel = original?.cancel;\n const flush = original?.flush;\n const readableType = original?.readableType;\n const start = original?.start;\n const transform = original?.transform;\n const writableType = original?.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original!, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original!, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original!, `${context} has member 'transform' that`),\n writableType\n };\n}\n\nfunction convertTransformerFlushCallback(\n fn: TransformerFlushCallback,\n original: Transformer,\n context: string\n): (controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertTransformerStartCallback(\n fn: TransformerStartCallback,\n original: Transformer,\n context: string\n): TransformerStartCallback {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertTransformerTransformCallback(\n fn: TransformerTransformCallback,\n original: Transformer,\n context: string\n): (chunk: I, controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: I, controller: TransformStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n\nfunction convertTransformerCancelCallback(\n fn: TransformerCancelCallback,\n original: Transformer,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith,\n uponPromise\n} from './helpers/webidl';\nimport { CreateReadableStream, type DefaultReadableStream, ReadableStream } from './readable-stream';\nimport {\n ReadableStreamDefaultControllerCanCloseOrEnqueue,\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError,\n ReadableStreamDefaultControllerGetDesiredSize,\n ReadableStreamDefaultControllerHasBackpressure\n} from './readable-stream/default-controller';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { CreateWritableStream, WritableStream, WritableStreamDefaultControllerErrorIfNeeded } from './writable-stream';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from './transform-stream/transformer';\nimport { convertTransformer } from './validators/transformer';\n\n// Class TransformStream\n\n/**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\nexport class TransformStream {\n /** @internal */\n _writable!: WritableStream;\n /** @internal */\n _readable!: DefaultReadableStream;\n /** @internal */\n _backpressure!: boolean;\n /** @internal */\n _backpressureChangePromise!: Promise;\n /** @internal */\n _backpressureChangePromise_resolve!: () => void;\n /** @internal */\n _transformStreamController!: TransformStreamDefaultController;\n\n constructor(\n transformer?: Transformer,\n writableStrategy?: QueuingStrategy,\n readableStrategy?: QueuingStrategy\n );\n constructor(rawTransformer: Transformer | null | undefined = {},\n rawWritableStrategy: QueuingStrategy | null | undefined = {},\n rawReadableStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(\n this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm\n );\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n } else {\n startPromise_resolve(undefined);\n }\n }\n\n /**\n * The readable side of the transform stream.\n */\n get readable(): ReadableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n\n return this._readable;\n }\n\n /**\n * The writable side of the transform stream.\n */\n get writable(): WritableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n\n return this._writable;\n }\n}\n\nObject.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n}\n\nexport type {\n Transformer,\n TransformerCancelCallback,\n TransformerStartCallback,\n TransformerFlushCallback,\n TransformerTransformCallback\n};\n\n// Transform Stream Abstract Operations\n\nexport function CreateTransformStream(startAlgorithm: () => void | PromiseLike,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n writableHighWaterMark = 1,\n writableSizeAlgorithm: QueuingStrategySizeCallback = () => 1,\n readableHighWaterMark = 0,\n readableSizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(writableHighWaterMark));\n assert(IsNonNegativeNumber(readableHighWaterMark));\n\n const stream: TransformStream = Object.create(TransformStream.prototype);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n\n const startResult = startAlgorithm();\n startPromise_resolve(startResult);\n return stream;\n}\n\nfunction InitializeTransformStream(stream: TransformStream,\n startPromise: Promise,\n writableHighWaterMark: number,\n writableSizeAlgorithm: QueuingStrategySizeCallback,\n readableHighWaterMark: number,\n readableSizeAlgorithm: QueuingStrategySizeCallback) {\n function startAlgorithm(): Promise {\n return startPromise;\n }\n\n function writeAlgorithm(chunk: I): Promise {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n\n function abortAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n\n function closeAlgorithm(): Promise {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm,\n writableHighWaterMark, writableSizeAlgorithm);\n\n function pullAlgorithm(): Promise {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n\n function cancelAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined!;\n stream._backpressureChangePromise = undefined!;\n stream._backpressureChangePromise_resolve = undefined!;\n TransformStreamSetBackpressure(stream, true);\n\n stream._transformStreamController = undefined!;\n}\n\nfunction IsTransformStream(x: unknown): x is TransformStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n\n return x instanceof TransformStream;\n}\n\n// This is a no-op if both sides are already errored.\nfunction TransformStreamError(stream: TransformStream, e: any) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n}\n\nfunction TransformStreamErrorWritableAndUnblockWrite(stream: TransformStream, e: any) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n}\n\nfunction TransformStreamUnblockWrite(stream: TransformStream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure()\n // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time\n // _backpressure is set.\n TransformStreamSetBackpressure(stream, false);\n }\n}\n\nfunction TransformStreamSetBackpressure(stream: TransformStream, backpressure: boolean) {\n // Passes also when called during construction.\n assert(stream._backpressure !== backpressure);\n\n if (stream._backpressureChangePromise !== undefined) {\n stream._backpressureChangePromise_resolve();\n }\n\n stream._backpressureChangePromise = newPromise(resolve => {\n stream._backpressureChangePromise_resolve = resolve;\n });\n\n stream._backpressure = backpressure;\n}\n\n// Class TransformStreamDefaultController\n\n/**\n * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}.\n *\n * @public\n */\nexport class TransformStreamDefaultController {\n /** @internal */\n _controlledTransformStream: TransformStream;\n /** @internal */\n _finishPromise: Promise | undefined;\n /** @internal */\n _finishPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _finishPromise_reject?: (reason: any) => void;\n /** @internal */\n _transformAlgorithm: (chunk: any) => Promise;\n /** @internal */\n _flushAlgorithm: () => Promise;\n /** @internal */\n _cancelAlgorithm: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full.\n */\n get desiredSize(): number | null {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n const readableController = this._controlledTransformStream._readable._readableStreamController;\n return ReadableStreamDefaultControllerGetDesiredSize(readableController);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the readable side of the controlled transform stream.\n */\n enqueue(chunk: O): void;\n enqueue(chunk: O = undefined!): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n TransformStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors both the readable side and the writable side of the controlled transform stream, making all future\n * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.\n */\n error(reason: any = undefined): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n TransformStreamDefaultControllerError(this, reason);\n }\n\n /**\n * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate(): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n\n TransformStreamDefaultControllerTerminate(this);\n }\n}\n\nObject.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(TransformStreamDefaultController.prototype.error, 'error');\nsetFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n}\n\n// Transform Stream Default Controller Abstract Operations\n\nfunction IsTransformStreamDefaultController(x: any): x is TransformStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n\n return x instanceof TransformStreamDefaultController;\n}\n\nfunction SetUpTransformStreamDefaultController(stream: TransformStream,\n controller: TransformStreamDefaultController,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise) {\n assert(IsTransformStream(stream));\n assert(stream._transformStreamController === undefined);\n\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nfunction SetUpTransformStreamDefaultControllerFromTransformer(stream: TransformStream,\n transformer: ValidatedTransformer) {\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n let transformAlgorithm: (chunk: I) => Promise;\n let flushAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform!(chunk, controller);\n } else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk as unknown as O);\n return promiseResolvedWith(undefined);\n } catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush!(controller);\n } else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n}\n\nfunction TransformStreamDefaultControllerClearAlgorithms(controller: TransformStreamDefaultController) {\n controller._transformAlgorithm = undefined!;\n controller._flushAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\nfunction TransformStreamDefaultControllerEnqueue(controller: TransformStreamDefaultController, chunk: O) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n\n // We throttle transform invocations based on the backpressure of the ReadableStream, but we still\n // accept TransformStreamDefaultControllerEnqueue() calls.\n\n try {\n ReadableStreamDefaultControllerEnqueue(readableController, chunk);\n } catch (e) {\n // This happens when readableStrategy.size() throws.\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n\n throw stream._readable._storedError;\n }\n\n const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);\n if (backpressure !== stream._backpressure) {\n assert(backpressure);\n TransformStreamSetBackpressure(stream, true);\n }\n}\n\nfunction TransformStreamDefaultControllerError(controller: TransformStreamDefaultController, e: any) {\n TransformStreamError(controller._controlledTransformStream, e);\n}\n\nfunction TransformStreamDefaultControllerPerformTransform(controller: TransformStreamDefaultController,\n chunk: I) {\n const transformPromise = controller._transformAlgorithm(chunk);\n return transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n}\n\nfunction TransformStreamDefaultControllerTerminate(controller: TransformStreamDefaultController) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n\n ReadableStreamDefaultControllerClose(readableController);\n\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n}\n\n// TransformStreamDefaultSink Algorithms\n\nfunction TransformStreamDefaultSinkWriteAlgorithm(stream: TransformStream, chunk: I): Promise {\n assert(stream._writable._state === 'writable');\n\n const controller = stream._transformStreamController;\n\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n assert(backpressureChangePromise !== undefined);\n return transformPromiseWith(backpressureChangePromise, () => {\n const writable = stream._writable;\n const state = writable._state;\n if (state === 'erroring') {\n throw writable._storedError;\n }\n assert(state === 'writable');\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n });\n }\n\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n}\n\nfunction TransformStreamDefaultSinkAbortAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally,\n // we don't run the _cancelAlgorithm again.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerError(readable._readableStreamController, reason);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\nfunction TransformStreamDefaultSinkCloseAlgorithm(stream: TransformStream): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// TransformStreamDefaultSource Algorithms\n\nfunction TransformStreamDefaultSourcePullAlgorithm(stream: TransformStream): Promise {\n // Invariant. Enforced by the promises returned by start() and pull().\n assert(stream._backpressure);\n\n assert(stream._backpressureChangePromise !== undefined);\n\n TransformStreamSetBackpressure(stream, false);\n\n // Prevent the next pull() call until there is backpressure.\n return stream._backpressureChangePromise;\n}\n\nfunction TransformStreamDefaultSourceCancelAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._writable cannot change after construction, so caching it across a call to user code is safe.\n const writable = stream._writable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or\n // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the\n // _flushAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (writable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, writable._storedError);\n } else {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// Helper functions for the TransformStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n}\n\nexport function defaultControllerFinishPromiseResolve(controller: TransformStreamDefaultController) {\n if (controller._finishPromise_resolve === undefined) {\n return;\n }\n\n controller._finishPromise_resolve();\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nexport function defaultControllerFinishPromiseReject(controller: TransformStreamDefaultController, reason: any) {\n if (controller._finishPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(controller._finishPromise!);\n controller._finishPromise_reject(reason);\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\n// Helper functions for the TransformStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStream.prototype.${name} can only be used on a 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\ No newline at end of file diff --git a/node_modules/web-streams-polyfill/dist/ponyfill.es6.mjs b/node_modules/web-streams-polyfill/dist/ponyfill.es6.mjs new file mode 100644 index 00000000..1d4d6899 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/ponyfill.es6.mjs @@ -0,0 +1,4790 @@ +/** + * @license + * web-streams-polyfill v3.3.3 + * Copyright 2024 Mattias Buelens, Diwank Singh Tomer and other contributors. + * This code is released under the MIT license. + * SPDX-License-Identifier: MIT + */ +function noop() { + return undefined; +} + +function typeIsObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; +} +const rethrowAssertionErrorRejection = noop; +function setFunctionName(fn, name) { + try { + Object.defineProperty(fn, 'name', { + value: name, + configurable: true + }); + } + catch (_a) { + // This property is non-configurable in older browsers, so ignore if this throws. + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility + } +} + +const originalPromise = Promise; +const originalPromiseThen = Promise.prototype.then; +const originalPromiseReject = Promise.reject.bind(originalPromise); +// https://webidl.spec.whatwg.org/#a-new-promise +function newPromise(executor) { + return new originalPromise(executor); +} +// https://webidl.spec.whatwg.org/#a-promise-resolved-with +function promiseResolvedWith(value) { + return newPromise(resolve => resolve(value)); +} +// https://webidl.spec.whatwg.org/#a-promise-rejected-with +function promiseRejectedWith(reason) { + return originalPromiseReject(reason); +} +function PerformPromiseThen(promise, onFulfilled, onRejected) { + // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an + // approximation. + return originalPromiseThen.call(promise, onFulfilled, onRejected); +} +// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned +// from that handler. To prevent this, return null instead of void from all handlers. +// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it +function uponPromise(promise, onFulfilled, onRejected) { + PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection); +} +function uponFulfillment(promise, onFulfilled) { + uponPromise(promise, onFulfilled); +} +function uponRejection(promise, onRejected) { + uponPromise(promise, undefined, onRejected); +} +function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) { + return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler); +} +function setPromiseIsHandledToTrue(promise) { + PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection); +} +let _queueMicrotask = callback => { + if (typeof queueMicrotask === 'function') { + _queueMicrotask = queueMicrotask; + } + else { + const resolvedPromise = promiseResolvedWith(undefined); + _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb); + } + return _queueMicrotask(callback); +}; +function reflectCall(F, V, args) { + if (typeof F !== 'function') { + throw new TypeError('Argument is not a function'); + } + return Function.prototype.apply.call(F, V, args); +} +function promiseCall(F, V, args) { + try { + return promiseResolvedWith(reflectCall(F, V, args)); + } + catch (value) { + return promiseRejectedWith(value); + } +} + +// Original from Chromium +// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js +const QUEUE_MAX_ARRAY_SIZE = 16384; +/** + * Simple queue structure. + * + * Avoids scalability issues with using a packed array directly by using + * multiple arrays in a linked list and keeping the array size bounded. + */ +class SimpleQueue { + constructor() { + this._cursor = 0; + this._size = 0; + // _front and _back are always defined. + this._front = { + _elements: [], + _next: undefined + }; + this._back = this._front; + // The cursor is used to avoid calling Array.shift(). + // It contains the index of the front element of the array inside the + // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE). + this._cursor = 0; + // When there is only one node, size === elements.length - cursor. + this._size = 0; + } + get length() { + return this._size; + } + // For exception safety, this method is structured in order: + // 1. Read state + // 2. Calculate required state mutations + // 3. Perform state mutations + push(element) { + const oldBack = this._back; + let newBack = oldBack; + if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) { + newBack = { + _elements: [], + _next: undefined + }; + } + // push() is the mutation most likely to throw an exception, so it + // goes first. + oldBack._elements.push(element); + if (newBack !== oldBack) { + this._back = newBack; + oldBack._next = newBack; + } + ++this._size; + } + // Like push(), shift() follows the read -> calculate -> mutate pattern for + // exception safety. + shift() { // must not be called on an empty queue + const oldFront = this._front; + let newFront = oldFront; + const oldCursor = this._cursor; + let newCursor = oldCursor + 1; + const elements = oldFront._elements; + const element = elements[oldCursor]; + if (newCursor === QUEUE_MAX_ARRAY_SIZE) { + newFront = oldFront._next; + newCursor = 0; + } + // No mutations before this point. + --this._size; + this._cursor = newCursor; + if (oldFront !== newFront) { + this._front = newFront; + } + // Permit shifted element to be garbage collected. + elements[oldCursor] = undefined; + return element; + } + // The tricky thing about forEach() is that it can be called + // re-entrantly. The queue may be mutated inside the callback. It is easy to + // see that push() within the callback has no negative effects since the end + // of the queue is checked for on every iteration. If shift() is called + // repeatedly within the callback then the next iteration may return an + // element that has been removed. In this case the callback will be called + // with undefined values until we either "catch up" with elements that still + // exist or reach the back of the queue. + forEach(callback) { + let i = this._cursor; + let node = this._front; + let elements = node._elements; + while (i !== elements.length || node._next !== undefined) { + if (i === elements.length) { + node = node._next; + elements = node._elements; + i = 0; + if (elements.length === 0) { + break; + } + } + callback(elements[i]); + ++i; + } + } + // Return the element that would be returned if shift() was called now, + // without modifying the queue. + peek() { // must not be called on an empty queue + const front = this._front; + const cursor = this._cursor; + return front._elements[cursor]; + } +} + +const AbortSteps = Symbol('[[AbortSteps]]'); +const ErrorSteps = Symbol('[[ErrorSteps]]'); +const CancelSteps = Symbol('[[CancelSteps]]'); +const PullSteps = Symbol('[[PullSteps]]'); +const ReleaseSteps = Symbol('[[ReleaseSteps]]'); + +function ReadableStreamReaderGenericInitialize(reader, stream) { + reader._ownerReadableStream = stream; + stream._reader = reader; + if (stream._state === 'readable') { + defaultReaderClosedPromiseInitialize(reader); + } + else if (stream._state === 'closed') { + defaultReaderClosedPromiseInitializeAsResolved(reader); + } + else { + defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError); + } +} +// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state +// check. +function ReadableStreamReaderGenericCancel(reader, reason) { + const stream = reader._ownerReadableStream; + return ReadableStreamCancel(stream, reason); +} +function ReadableStreamReaderGenericRelease(reader) { + const stream = reader._ownerReadableStream; + if (stream._state === 'readable') { + defaultReaderClosedPromiseReject(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + else { + defaultReaderClosedPromiseResetToRejected(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`)); + } + stream._readableStreamController[ReleaseSteps](); + stream._reader = undefined; + reader._ownerReadableStream = undefined; +} +// Helper functions for the readers. +function readerLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released reader'); +} +// Helper functions for the ReadableStreamDefaultReader. +function defaultReaderClosedPromiseInitialize(reader) { + reader._closedPromise = newPromise((resolve, reject) => { + reader._closedPromise_resolve = resolve; + reader._closedPromise_reject = reject; + }); +} +function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseReject(reader, reason); +} +function defaultReaderClosedPromiseInitializeAsResolved(reader) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseResolve(reader); +} +function defaultReaderClosedPromiseReject(reader, reason) { + if (reader._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(reader._closedPromise); + reader._closedPromise_reject(reason); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; +} +function defaultReaderClosedPromiseResetToRejected(reader, reason) { + defaultReaderClosedPromiseInitializeAsRejected(reader, reason); +} +function defaultReaderClosedPromiseResolve(reader) { + if (reader._closedPromise_resolve === undefined) { + return; + } + reader._closedPromise_resolve(undefined); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; +} + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill +const NumberIsFinite = Number.isFinite || function (x) { + return typeof x === 'number' && isFinite(x); +}; + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill +const MathTrunc = Math.trunc || function (v) { + return v < 0 ? Math.ceil(v) : Math.floor(v); +}; + +// https://heycam.github.io/webidl/#idl-dictionaries +function isDictionary(x) { + return typeof x === 'object' || typeof x === 'function'; +} +function assertDictionary(obj, context) { + if (obj !== undefined && !isDictionary(obj)) { + throw new TypeError(`${context} is not an object.`); + } +} +// https://heycam.github.io/webidl/#idl-callback-functions +function assertFunction(x, context) { + if (typeof x !== 'function') { + throw new TypeError(`${context} is not a function.`); + } +} +// https://heycam.github.io/webidl/#idl-object +function isObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; +} +function assertObject(x, context) { + if (!isObject(x)) { + throw new TypeError(`${context} is not an object.`); + } +} +function assertRequiredArgument(x, position, context) { + if (x === undefined) { + throw new TypeError(`Parameter ${position} is required in '${context}'.`); + } +} +function assertRequiredField(x, field, context) { + if (x === undefined) { + throw new TypeError(`${field} is required in '${context}'.`); + } +} +// https://heycam.github.io/webidl/#idl-unrestricted-double +function convertUnrestrictedDouble(value) { + return Number(value); +} +function censorNegativeZero(x) { + return x === 0 ? 0 : x; +} +function integerPart(x) { + return censorNegativeZero(MathTrunc(x)); +} +// https://heycam.github.io/webidl/#idl-unsigned-long-long +function convertUnsignedLongLongWithEnforceRange(value, context) { + const lowerBound = 0; + const upperBound = Number.MAX_SAFE_INTEGER; + let x = Number(value); + x = censorNegativeZero(x); + if (!NumberIsFinite(x)) { + throw new TypeError(`${context} is not a finite number`); + } + x = integerPart(x); + if (x < lowerBound || x > upperBound) { + throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`); + } + if (!NumberIsFinite(x) || x === 0) { + return 0; + } + // TODO Use BigInt if supported? + // let xBigInt = BigInt(integerPart(x)); + // xBigInt = BigInt.asUintN(64, xBigInt); + // return Number(xBigInt); + return x; +} + +function assertReadableStream(x, context) { + if (!IsReadableStream(x)) { + throw new TypeError(`${context} is not a ReadableStream.`); + } +} + +// Abstract operations for the ReadableStream. +function AcquireReadableStreamDefaultReader(stream) { + return new ReadableStreamDefaultReader(stream); +} +// ReadableStream API exposed for controllers. +function ReadableStreamAddReadRequest(stream, readRequest) { + stream._reader._readRequests.push(readRequest); +} +function ReadableStreamFulfillReadRequest(stream, chunk, done) { + const reader = stream._reader; + const readRequest = reader._readRequests.shift(); + if (done) { + readRequest._closeSteps(); + } + else { + readRequest._chunkSteps(chunk); + } +} +function ReadableStreamGetNumReadRequests(stream) { + return stream._reader._readRequests.length; +} +function ReadableStreamHasDefaultReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamDefaultReader(reader)) { + return false; + } + return true; +} +/** + * A default reader vended by a {@link ReadableStream}. + * + * @public + */ +class ReadableStreamDefaultReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, + * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + /** + * Returns a promise that allows access to the next chunk from the stream's internal queue, if available. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + read() { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('read')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: () => resolvePromise({ value: undefined, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamDefaultReaderRead(this, readRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamDefaultReader(this)) { + throw defaultReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamDefaultReaderRelease(this); + } +} +Object.defineProperties(ReadableStreamDefaultReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } +}); +setFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel'); +setFunctionName(ReadableStreamDefaultReader.prototype.read, 'read'); +setFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultReader', + configurable: true + }); +} +// Abstract operations for the readers. +function IsReadableStreamDefaultReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) { + return false; + } + return x instanceof ReadableStreamDefaultReader; +} +function ReadableStreamDefaultReaderRead(reader, readRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'closed') { + readRequest._closeSteps(); + } + else if (stream._state === 'errored') { + readRequest._errorSteps(stream._storedError); + } + else { + stream._readableStreamController[PullSteps](readRequest); + } +} +function ReadableStreamDefaultReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamDefaultReaderErrorReadRequests(reader, e); +} +function ReadableStreamDefaultReaderErrorReadRequests(reader, e) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._errorSteps(e); + }); +} +// Helper functions for the ReadableStreamDefaultReader. +function defaultReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`); +} + +/****************************************************************************** +Copyright (c) Microsoft Corporation. + +Permission to use, copy, modify, and/or distribute this software for any +purpose with or without fee is hereby granted. + +THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH +REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY +AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, +INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM +LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR +OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR +PERFORMANCE OF THIS SOFTWARE. +***************************************************************************** */ +/* global Reflect, Promise, SuppressedError, Symbol */ + + +function __values(o) { + var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0; + if (m) return m.call(o); + if (o && typeof o.length === "number") return { + next: function () { + if (o && i >= o.length) o = void 0; + return { value: o && o[i++], done: !o }; + } + }; + throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined."); +} + +function __await(v) { + return this instanceof __await ? (this.v = v, this) : new __await(v); +} + +function __asyncGenerator(thisArg, _arguments, generator) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var g = generator.apply(thisArg, _arguments || []), i, q = []; + return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i; + function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; } + function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } } + function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); } + function fulfill(value) { resume("next", value); } + function reject(value) { resume("throw", value); } + function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); } +} + +function __asyncDelegator(o) { + var i, p; + return i = {}, verb("next"), verb("throw", function (e) { throw e; }), verb("return"), i[Symbol.iterator] = function () { return this; }, i; + function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; } +} + +function __asyncValues(o) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var m = o[Symbol.asyncIterator], i; + return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i); + function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; } + function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); } +} + +typeof SuppressedError === "function" ? SuppressedError : function (error, suppressed, message) { + var e = new Error(message); + return e.name = "SuppressedError", e.error = error, e.suppressed = suppressed, e; +}; + +var _a, _b, _c; +function CreateArrayFromList(elements) { + // We use arrays to represent lists, so this is basically a no-op. + // Do a slice though just in case we happen to depend on the unique-ness. + return elements.slice(); +} +function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) { + new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset); +} +let TransferArrayBuffer = (O) => { + if (typeof O.transfer === 'function') { + TransferArrayBuffer = buffer => buffer.transfer(); + } + else if (typeof structuredClone === 'function') { + TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] }); + } + else { + // Not implemented correctly + TransferArrayBuffer = buffer => buffer; + } + return TransferArrayBuffer(O); +}; +let IsDetachedBuffer = (O) => { + if (typeof O.detached === 'boolean') { + IsDetachedBuffer = buffer => buffer.detached; + } + else { + // Not implemented correctly + IsDetachedBuffer = buffer => buffer.byteLength === 0; + } + return IsDetachedBuffer(O); +}; +function ArrayBufferSlice(buffer, begin, end) { + // ArrayBuffer.prototype.slice is not available on IE10 + // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice + if (buffer.slice) { + return buffer.slice(begin, end); + } + const length = end - begin; + const slice = new ArrayBuffer(length); + CopyDataBlockBytes(slice, 0, buffer, begin, length); + return slice; +} +function GetMethod(receiver, prop) { + const func = receiver[prop]; + if (func === undefined || func === null) { + return undefined; + } + if (typeof func !== 'function') { + throw new TypeError(`${String(prop)} is not a function`); + } + return func; +} +function CreateAsyncFromSyncIterator(syncIteratorRecord) { + // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%, + // we use yield* inside an async generator function to achieve the same result. + // Wrap the sync iterator inside a sync iterable, so we can use it with yield*. + const syncIterable = { + [Symbol.iterator]: () => syncIteratorRecord.iterator + }; + // Create an async generator function and immediately invoke it. + const asyncIterator = (function () { + return __asyncGenerator(this, arguments, function* () { + return yield __await(yield __await(yield* __asyncDelegator(__asyncValues(syncIterable)))); + }); + }()); + // Return as an async iterator record. + const nextMethod = asyncIterator.next; + return { iterator: asyncIterator, nextMethod, done: false }; +} +// Aligns with core-js/modules/es.symbol.async-iterator.js +const SymbolAsyncIterator = (_c = (_a = Symbol.asyncIterator) !== null && _a !== void 0 ? _a : (_b = Symbol.for) === null || _b === void 0 ? void 0 : _b.call(Symbol, 'Symbol.asyncIterator')) !== null && _c !== void 0 ? _c : '@@asyncIterator'; +function GetIterator(obj, hint = 'sync', method) { + if (method === undefined) { + if (hint === 'async') { + method = GetMethod(obj, SymbolAsyncIterator); + if (method === undefined) { + const syncMethod = GetMethod(obj, Symbol.iterator); + const syncIteratorRecord = GetIterator(obj, 'sync', syncMethod); + return CreateAsyncFromSyncIterator(syncIteratorRecord); + } + } + else { + method = GetMethod(obj, Symbol.iterator); + } + } + if (method === undefined) { + throw new TypeError('The object is not iterable'); + } + const iterator = reflectCall(method, obj, []); + if (!typeIsObject(iterator)) { + throw new TypeError('The iterator method must return an object'); + } + const nextMethod = iterator.next; + return { iterator, nextMethod, done: false }; +} +function IteratorNext(iteratorRecord) { + const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []); + if (!typeIsObject(result)) { + throw new TypeError('The iterator.next() method must return an object'); + } + return result; +} +function IteratorComplete(iterResult) { + return Boolean(iterResult.done); +} +function IteratorValue(iterResult) { + return iterResult.value; +} + +/// +// We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it. +const AsyncIteratorPrototype = { + // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( ) + // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator + [SymbolAsyncIterator]() { + return this; + } +}; +Object.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false }); + +/// +class ReadableStreamAsyncIteratorImpl { + constructor(reader, preventCancel) { + this._ongoingPromise = undefined; + this._isFinished = false; + this._reader = reader; + this._preventCancel = preventCancel; + } + next() { + const nextSteps = () => this._nextSteps(); + this._ongoingPromise = this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) : + nextSteps(); + return this._ongoingPromise; + } + return(value) { + const returnSteps = () => this._returnSteps(value); + return this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) : + returnSteps(); + } + _nextSteps() { + if (this._isFinished) { + return Promise.resolve({ value: undefined, done: true }); + } + const reader = this._reader; + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readRequest = { + _chunkSteps: chunk => { + this._ongoingPromise = undefined; + // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test. + // FIXME Is this a bug in the specification, or in the test? + _queueMicrotask(() => resolvePromise({ value: chunk, done: false })); + }, + _closeSteps: () => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + resolvePromise({ value: undefined, done: true }); + }, + _errorSteps: reason => { + this._ongoingPromise = undefined; + this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + rejectPromise(reason); + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promise; + } + _returnSteps(value) { + if (this._isFinished) { + return Promise.resolve({ value, done: true }); + } + this._isFinished = true; + const reader = this._reader; + if (!this._preventCancel) { + const result = ReadableStreamReaderGenericCancel(reader, value); + ReadableStreamReaderGenericRelease(reader); + return transformPromiseWith(result, () => ({ value, done: true })); + } + ReadableStreamReaderGenericRelease(reader); + return promiseResolvedWith({ value, done: true }); + } +} +const ReadableStreamAsyncIteratorPrototype = { + next() { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next')); + } + return this._asyncIteratorImpl.next(); + }, + return(value) { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return')); + } + return this._asyncIteratorImpl.return(value); + } +}; +Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype); +// Abstract operations for the ReadableStream. +function AcquireReadableStreamAsyncIterator(stream, preventCancel) { + const reader = AcquireReadableStreamDefaultReader(stream); + const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel); + const iterator = Object.create(ReadableStreamAsyncIteratorPrototype); + iterator._asyncIteratorImpl = impl; + return iterator; +} +function IsReadableStreamAsyncIterator(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) { + return false; + } + try { + // noinspection SuspiciousTypeOfGuard + return x._asyncIteratorImpl instanceof + ReadableStreamAsyncIteratorImpl; + } + catch (_a) { + return false; + } +} +// Helper functions for the ReadableStream. +function streamAsyncIteratorBrandCheckException(name) { + return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`); +} + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill +const NumberIsNaN = Number.isNaN || function (x) { + // eslint-disable-next-line no-self-compare + return x !== x; +}; + +function IsNonNegativeNumber(v) { + if (typeof v !== 'number') { + return false; + } + if (NumberIsNaN(v)) { + return false; + } + if (v < 0) { + return false; + } + return true; +} +function CloneAsUint8Array(O) { + const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength); + return new Uint8Array(buffer); +} + +function DequeueValue(container) { + const pair = container._queue.shift(); + container._queueTotalSize -= pair.size; + if (container._queueTotalSize < 0) { + container._queueTotalSize = 0; + } + return pair.value; +} +function EnqueueValueWithSize(container, value, size) { + if (!IsNonNegativeNumber(size) || size === Infinity) { + throw new RangeError('Size must be a finite, non-NaN, non-negative number.'); + } + container._queue.push({ value, size }); + container._queueTotalSize += size; +} +function PeekQueueValue(container) { + const pair = container._queue.peek(); + return pair.value; +} +function ResetQueue(container) { + container._queue = new SimpleQueue(); + container._queueTotalSize = 0; +} + +function isDataViewConstructor(ctor) { + return ctor === DataView; +} +function isDataView(view) { + return isDataViewConstructor(view.constructor); +} +function arrayBufferViewElementSize(ctor) { + if (isDataViewConstructor(ctor)) { + return 1; + } + return ctor.BYTES_PER_ELEMENT; +} + +/** + * A pull-into request in a {@link ReadableByteStreamController}. + * + * @public + */ +class ReadableStreamBYOBRequest { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the view for writing in to, or `null` if the BYOB request has already been responded to. + */ + get view() { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('view'); + } + return this._view; + } + respond(bytesWritten) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respond'); + } + assertRequiredArgument(bytesWritten, 1, 'respond'); + bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter'); + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(this._view.buffer)) { + throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`); + } + ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten); + } + respondWithNewView(view) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respondWithNewView'); + } + assertRequiredArgument(view, 1, 'respondWithNewView'); + if (!ArrayBuffer.isView(view)) { + throw new TypeError('You can only respond with array buffer views'); + } + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(view.buffer)) { + throw new TypeError('The given view\'s buffer has been detached and so cannot be used as a response'); + } + ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view); + } +} +Object.defineProperties(ReadableStreamBYOBRequest.prototype, { + respond: { enumerable: true }, + respondWithNewView: { enumerable: true }, + view: { enumerable: true } +}); +setFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond'); +setFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBRequest', + configurable: true + }); +} +/** + * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue. + * + * @public + */ +class ReadableByteStreamController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the current BYOB pull request, or `null` if there isn't one. + */ + get byobRequest() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('byobRequest'); + } + return ReadableByteStreamControllerGetBYOBRequest(this); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('desiredSize'); + } + return ReadableByteStreamControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('close'); + } + if (this._closeRequested) { + throw new TypeError('The stream has already been closed; do not close it again!'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`); + } + ReadableByteStreamControllerClose(this); + } + enqueue(chunk) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('enqueue'); + } + assertRequiredArgument(chunk, 1, 'enqueue'); + if (!ArrayBuffer.isView(chunk)) { + throw new TypeError('chunk must be an array buffer view'); + } + if (chunk.byteLength === 0) { + throw new TypeError('chunk must have non-zero byteLength'); + } + if (chunk.buffer.byteLength === 0) { + throw new TypeError(`chunk's buffer must have non-zero byteLength`); + } + if (this._closeRequested) { + throw new TypeError('stream is closed or draining'); + } + const state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`); + } + ReadableByteStreamControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('error'); + } + ReadableByteStreamControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ReadableByteStreamControllerClearPendingPullIntos(this); + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableByteStreamControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableByteStream; + if (this._queueTotalSize > 0) { + ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest); + return; + } + const autoAllocateChunkSize = this._autoAllocateChunkSize; + if (autoAllocateChunkSize !== undefined) { + let buffer; + try { + buffer = new ArrayBuffer(autoAllocateChunkSize); + } + catch (bufferE) { + readRequest._errorSteps(bufferE); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: autoAllocateChunkSize, + byteOffset: 0, + byteLength: autoAllocateChunkSize, + bytesFilled: 0, + minimumFill: 1, + elementSize: 1, + viewConstructor: Uint8Array, + readerType: 'default' + }; + this._pendingPullIntos.push(pullIntoDescriptor); + } + ReadableStreamAddReadRequest(stream, readRequest); + ReadableByteStreamControllerCallPullIfNeeded(this); + } + /** @internal */ + [ReleaseSteps]() { + if (this._pendingPullIntos.length > 0) { + const firstPullInto = this._pendingPullIntos.peek(); + firstPullInto.readerType = 'none'; + this._pendingPullIntos = new SimpleQueue(); + this._pendingPullIntos.push(firstPullInto); + } + } +} +Object.defineProperties(ReadableByteStreamController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + byobRequest: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(ReadableByteStreamController.prototype.close, 'close'); +setFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue'); +setFunctionName(ReadableByteStreamController.prototype.error, 'error'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, { + value: 'ReadableByteStreamController', + configurable: true + }); +} +// Abstract operations for the ReadableByteStreamController. +function IsReadableByteStreamController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) { + return false; + } + return x instanceof ReadableByteStreamController; +} +function IsReadableStreamBYOBRequest(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) { + return false; + } + return x instanceof ReadableStreamBYOBRequest; +} +function ReadableByteStreamControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableByteStreamControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + // TODO: Test controller argument + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableByteStreamControllerError(controller, e); + return null; + }); +} +function ReadableByteStreamControllerClearPendingPullIntos(controller) { + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + controller._pendingPullIntos = new SimpleQueue(); +} +function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) { + let done = false; + if (stream._state === 'closed') { + done = true; + } + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'default') { + ReadableStreamFulfillReadRequest(stream, filledView, done); + } + else { + ReadableStreamFulfillReadIntoRequest(stream, filledView, done); + } +} +function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) { + const bytesFilled = pullIntoDescriptor.bytesFilled; + const elementSize = pullIntoDescriptor.elementSize; + return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize); +} +function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) { + controller._queue.push({ buffer, byteOffset, byteLength }); + controller._queueTotalSize += byteLength; +} +function ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, buffer, byteOffset, byteLength) { + let clonedChunk; + try { + clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength); + } + catch (cloneE) { + ReadableByteStreamControllerError(controller, cloneE); + throw cloneE; + } + ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength); +} +function ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstDescriptor) { + if (firstDescriptor.bytesFilled > 0) { + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, firstDescriptor.buffer, firstDescriptor.byteOffset, firstDescriptor.bytesFilled); + } + ReadableByteStreamControllerShiftPendingPullInto(controller); +} +function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) { + const maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled); + const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy; + let totalBytesToCopyRemaining = maxBytesToCopy; + let ready = false; + const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize; + const maxAlignedBytes = maxBytesFilled - remainderBytes; + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) { + totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled; + ready = true; + } + const queue = controller._queue; + while (totalBytesToCopyRemaining > 0) { + const headOfQueue = queue.peek(); + const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength); + const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy); + if (headOfQueue.byteLength === bytesToCopy) { + queue.shift(); + } + else { + headOfQueue.byteOffset += bytesToCopy; + headOfQueue.byteLength -= bytesToCopy; + } + controller._queueTotalSize -= bytesToCopy; + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor); + totalBytesToCopyRemaining -= bytesToCopy; + } + return ready; +} +function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) { + pullIntoDescriptor.bytesFilled += size; +} +function ReadableByteStreamControllerHandleQueueDrain(controller) { + if (controller._queueTotalSize === 0 && controller._closeRequested) { + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(controller._controlledReadableByteStream); + } + else { + ReadableByteStreamControllerCallPullIfNeeded(controller); + } +} +function ReadableByteStreamControllerInvalidateBYOBRequest(controller) { + if (controller._byobRequest === null) { + return; + } + controller._byobRequest._associatedReadableByteStreamController = undefined; + controller._byobRequest._view = null; + controller._byobRequest = null; +} +function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) { + while (controller._pendingPullIntos.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const pullIntoDescriptor = controller._pendingPullIntos.peek(); + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + } + } +} +function ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller) { + const reader = controller._controlledReadableByteStream._reader; + while (reader._readRequests.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + const readRequest = reader._readRequests.shift(); + ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest); + } +} +function ReadableByteStreamControllerPullInto(controller, view, min, readIntoRequest) { + const stream = controller._controlledReadableByteStream; + const ctor = view.constructor; + const elementSize = arrayBufferViewElementSize(ctor); + const { byteOffset, byteLength } = view; + const minimumFill = min * elementSize; + let buffer; + try { + buffer = TransferArrayBuffer(view.buffer); + } + catch (e) { + readIntoRequest._errorSteps(e); + return; + } + const pullIntoDescriptor = { + buffer, + bufferByteLength: buffer.byteLength, + byteOffset, + byteLength, + bytesFilled: 0, + minimumFill, + elementSize, + viewConstructor: ctor, + readerType: 'byob' + }; + if (controller._pendingPullIntos.length > 0) { + controller._pendingPullIntos.push(pullIntoDescriptor); + // No ReadableByteStreamControllerCallPullIfNeeded() call since: + // - No change happens on desiredSize + // - The source has already been notified of that there's at least 1 pending read(view) + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + return; + } + if (stream._state === 'closed') { + const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0); + readIntoRequest._closeSteps(emptyView); + return; + } + if (controller._queueTotalSize > 0) { + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + ReadableByteStreamControllerHandleQueueDrain(controller); + readIntoRequest._chunkSteps(filledView); + return; + } + if (controller._closeRequested) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + readIntoRequest._errorSteps(e); + return; + } + } + controller._pendingPullIntos.push(pullIntoDescriptor); + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) { + if (firstDescriptor.readerType === 'none') { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const stream = controller._controlledReadableByteStream; + if (ReadableStreamHasBYOBReader(stream)) { + while (ReadableStreamGetNumReadIntoRequests(stream) > 0) { + const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor); + } + } +} +function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) { + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + return; + } + if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) { + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + return; + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize; + if (remainderSize > 0) { + const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, pullIntoDescriptor.buffer, end - remainderSize, remainderSize); + } + pullIntoDescriptor.bytesFilled -= remainderSize; + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); +} +function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor); + } + else { + ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerShiftPendingPullInto(controller) { + const descriptor = controller._pendingPullIntos.shift(); + return descriptor; +} +function ReadableByteStreamControllerShouldCallPull(controller) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return false; + } + if (controller._closeRequested) { + return false; + } + if (!controller._started) { + return false; + } + if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; +} +function ReadableByteStreamControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; +} +// A client of ReadableByteStreamController may use these functions directly to bypass state check. +function ReadableByteStreamControllerClose(controller) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + if (controller._queueTotalSize > 0) { + controller._closeRequested = true; + return; + } + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) { + const e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + throw e; + } + } + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(stream); +} +function ReadableByteStreamControllerEnqueue(controller, chunk) { + const stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + const { buffer, byteOffset, byteLength } = chunk; + if (IsDetachedBuffer(buffer)) { + throw new TypeError('chunk\'s buffer is detached and so cannot be enqueued'); + } + const transferredBuffer = TransferArrayBuffer(buffer); + if (controller._pendingPullIntos.length > 0) { + const firstPendingPullInto = controller._pendingPullIntos.peek(); + if (IsDetachedBuffer(firstPendingPullInto.buffer)) { + throw new TypeError('The BYOB request\'s buffer has been detached and so cannot be filled with an enqueued chunk'); + } + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer); + if (firstPendingPullInto.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto); + } + } + if (ReadableStreamHasDefaultReader(stream)) { + ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller); + if (ReadableStreamGetNumReadRequests(stream) === 0) { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + else { + if (controller._pendingPullIntos.length > 0) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength); + ReadableStreamFulfillReadRequest(stream, transferredView, false); + } + } + else if (ReadableStreamHasBYOBReader(stream)) { + // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully. + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + else { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerError(controller, e) { + const stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return; + } + ReadableByteStreamControllerClearPendingPullIntos(controller); + ResetQueue(controller); + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); +} +function ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest) { + const entry = controller._queue.shift(); + controller._queueTotalSize -= entry.byteLength; + ReadableByteStreamControllerHandleQueueDrain(controller); + const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength); + readRequest._chunkSteps(view); +} +function ReadableByteStreamControllerGetBYOBRequest(controller) { + if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled); + const byobRequest = Object.create(ReadableStreamBYOBRequest.prototype); + SetUpReadableStreamBYOBRequest(byobRequest, controller, view); + controller._byobRequest = byobRequest; + } + return controller._byobRequest; +} +function ReadableByteStreamControllerGetDesiredSize(controller) { + const state = controller._controlledReadableByteStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; +} +function ReadableByteStreamControllerRespond(controller, bytesWritten) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (bytesWritten !== 0) { + throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream'); + } + } + else { + if (bytesWritten === 0) { + throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream'); + } + if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) { + throw new RangeError('bytesWritten out of range'); + } + } + firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer); + ReadableByteStreamControllerRespondInternal(controller, bytesWritten); +} +function ReadableByteStreamControllerRespondWithNewView(controller, view) { + const firstDescriptor = controller._pendingPullIntos.peek(); + const state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (view.byteLength !== 0) { + throw new TypeError('The view\'s length must be 0 when calling respondWithNewView() on a closed stream'); + } + } + else { + if (view.byteLength === 0) { + throw new TypeError('The view\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'); + } + } + if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) { + throw new RangeError('The region specified by view does not match byobRequest'); + } + if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) { + throw new RangeError('The buffer of view has different capacity than byobRequest'); + } + if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) { + throw new RangeError('The region specified by view is larger than byobRequest'); + } + const viewByteLength = view.byteLength; + firstDescriptor.buffer = TransferArrayBuffer(view.buffer); + ReadableByteStreamControllerRespondInternal(controller, viewByteLength); +} +function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) { + controller._controlledReadableByteStream = stream; + controller._pullAgain = false; + controller._pulling = false; + controller._byobRequest = null; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._closeRequested = false; + controller._started = false; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._autoAllocateChunkSize = autoAllocateChunkSize; + controller._pendingPullIntos = new SimpleQueue(); + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableByteStreamControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableByteStreamControllerError(controller, r); + return null; + }); +} +function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) { + const controller = Object.create(ReadableByteStreamController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingByteSource.start !== undefined) { + startAlgorithm = () => underlyingByteSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingByteSource.pull !== undefined) { + pullAlgorithm = () => underlyingByteSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingByteSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingByteSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize; + if (autoAllocateChunkSize === 0) { + throw new TypeError('autoAllocateChunkSize must be greater than 0'); + } + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize); +} +function SetUpReadableStreamBYOBRequest(request, controller, view) { + request._associatedReadableByteStreamController = controller; + request._view = view; +} +// Helper functions for the ReadableStreamBYOBRequest. +function byobRequestBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`); +} +// Helper functions for the ReadableByteStreamController. +function byteStreamControllerBrandCheckException(name) { + return new TypeError(`ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`); +} + +function convertReaderOptions(options, context) { + assertDictionary(options, context); + const mode = options === null || options === void 0 ? void 0 : options.mode; + return { + mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`) + }; +} +function convertReadableStreamReaderMode(mode, context) { + mode = `${mode}`; + if (mode !== 'byob') { + throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`); + } + return mode; +} +function convertByobReadOptions(options, context) { + var _a; + assertDictionary(options, context); + const min = (_a = options === null || options === void 0 ? void 0 : options.min) !== null && _a !== void 0 ? _a : 1; + return { + min: convertUnsignedLongLongWithEnforceRange(min, `${context} has member 'min' that`) + }; +} + +// Abstract operations for the ReadableStream. +function AcquireReadableStreamBYOBReader(stream) { + return new ReadableStreamBYOBReader(stream); +} +// ReadableStream API exposed for controllers. +function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) { + stream._reader._readIntoRequests.push(readIntoRequest); +} +function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) { + const reader = stream._reader; + const readIntoRequest = reader._readIntoRequests.shift(); + if (done) { + readIntoRequest._closeSteps(chunk); + } + else { + readIntoRequest._chunkSteps(chunk); + } +} +function ReadableStreamGetNumReadIntoRequests(stream) { + return stream._reader._readIntoRequests.length; +} +function ReadableStreamHasBYOBReader(stream) { + const reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamBYOBReader(reader)) { + return false; + } + return true; +} +/** + * A BYOB reader vended by a {@link ReadableStream}. + * + * @public + */ +class ReadableStreamBYOBReader { + constructor(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + if (!IsReadableByteStreamController(stream._readableStreamController)) { + throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' + + 'source'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readIntoRequests = new SimpleQueue(); + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the reader's lock is released before the stream finishes closing. + */ + get closed() { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason = undefined) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + } + read(view, rawOptions = {}) { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('read')); + } + if (!ArrayBuffer.isView(view)) { + return promiseRejectedWith(new TypeError('view must be an array buffer view')); + } + if (view.byteLength === 0) { + return promiseRejectedWith(new TypeError('view must have non-zero byteLength')); + } + if (view.buffer.byteLength === 0) { + return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`)); + } + if (IsDetachedBuffer(view.buffer)) { + return promiseRejectedWith(new TypeError('view\'s buffer has been detached')); + } + let options; + try { + options = convertByobReadOptions(rawOptions, 'options'); + } + catch (e) { + return promiseRejectedWith(e); + } + const min = options.min; + if (min === 0) { + return promiseRejectedWith(new TypeError('options.min must be greater than 0')); + } + if (!isDataView(view)) { + if (min > view.length) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s length')); + } + } + else if (min > view.byteLength) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s byteLength')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + let resolvePromise; + let rejectPromise; + const promise = newPromise((resolve, reject) => { + resolvePromise = resolve; + rejectPromise = reject; + }); + const readIntoRequest = { + _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }), + _closeSteps: chunk => resolvePromise({ value: chunk, done: true }), + _errorSteps: e => rejectPromise(e) + }; + ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest); + return promise; + } + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock() { + if (!IsReadableStreamBYOBReader(this)) { + throw byobReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamBYOBReaderRelease(this); + } +} +Object.defineProperties(ReadableStreamBYOBReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } +}); +setFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel'); +setFunctionName(ReadableStreamBYOBReader.prototype.read, 'read'); +setFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, { + value: 'ReadableStreamBYOBReader', + configurable: true + }); +} +// Abstract operations for the readers. +function IsReadableStreamBYOBReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) { + return false; + } + return x instanceof ReadableStreamBYOBReader; +} +function ReadableStreamBYOBReaderRead(reader, view, min, readIntoRequest) { + const stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'errored') { + readIntoRequest._errorSteps(stream._storedError); + } + else { + ReadableByteStreamControllerPullInto(stream._readableStreamController, view, min, readIntoRequest); + } +} +function ReadableStreamBYOBReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + const e = new TypeError('Reader was released'); + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); +} +function ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._errorSteps(e); + }); +} +// Helper functions for the ReadableStreamBYOBReader. +function byobReaderBrandCheckException(name) { + return new TypeError(`ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`); +} + +function ExtractHighWaterMark(strategy, defaultHWM) { + const { highWaterMark } = strategy; + if (highWaterMark === undefined) { + return defaultHWM; + } + if (NumberIsNaN(highWaterMark) || highWaterMark < 0) { + throw new RangeError('Invalid highWaterMark'); + } + return highWaterMark; +} +function ExtractSizeAlgorithm(strategy) { + const { size } = strategy; + if (!size) { + return () => 1; + } + return size; +} + +function convertQueuingStrategy(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + const size = init === null || init === void 0 ? void 0 : init.size; + return { + highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark), + size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`) + }; +} +function convertQueuingStrategySize(fn, context) { + assertFunction(fn, context); + return chunk => convertUnrestrictedDouble(fn(chunk)); +} + +function convertUnderlyingSink(original, context) { + assertDictionary(original, context); + const abort = original === null || original === void 0 ? void 0 : original.abort; + const close = original === null || original === void 0 ? void 0 : original.close; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + const write = original === null || original === void 0 ? void 0 : original.write; + return { + abort: abort === undefined ? + undefined : + convertUnderlyingSinkAbortCallback(abort, original, `${context} has member 'abort' that`), + close: close === undefined ? + undefined : + convertUnderlyingSinkCloseCallback(close, original, `${context} has member 'close' that`), + start: start === undefined ? + undefined : + convertUnderlyingSinkStartCallback(start, original, `${context} has member 'start' that`), + write: write === undefined ? + undefined : + convertUnderlyingSinkWriteCallback(write, original, `${context} has member 'write' that`), + type + }; +} +function convertUnderlyingSinkAbortCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); +} +function convertUnderlyingSinkCloseCallback(fn, original, context) { + assertFunction(fn, context); + return () => promiseCall(fn, original, []); +} +function convertUnderlyingSinkStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); +} +function convertUnderlyingSinkWriteCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); +} + +function assertWritableStream(x, context) { + if (!IsWritableStream(x)) { + throw new TypeError(`${context} is not a WritableStream.`); + } +} + +function isAbortSignal(value) { + if (typeof value !== 'object' || value === null) { + return false; + } + try { + return typeof value.aborted === 'boolean'; + } + catch (_a) { + // AbortSignal.prototype.aborted throws if its brand check fails + return false; + } +} +const supportsAbortController = typeof AbortController === 'function'; +/** + * Construct a new AbortController, if supported by the platform. + * + * @internal + */ +function createAbortController() { + if (supportsAbortController) { + return new AbortController(); + } + return undefined; +} + +/** + * A writable stream represents a destination for data, into which you can write. + * + * @public + */ +class WritableStream { + constructor(rawUnderlyingSink = {}, rawStrategy = {}) { + if (rawUnderlyingSink === undefined) { + rawUnderlyingSink = null; + } + else { + assertObject(rawUnderlyingSink, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter'); + InitializeWritableStream(this); + const type = underlyingSink.type; + if (type !== undefined) { + throw new RangeError('Invalid type is specified'); + } + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm); + } + /** + * Returns whether or not the writable stream is locked to a writer. + */ + get locked() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('locked'); + } + return IsWritableStreamLocked(this); + } + /** + * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be + * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort + * mechanism of the underlying sink. + * + * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled + * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel + * the stream) if the stream is currently locked. + */ + abort(reason = undefined) { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('abort')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer')); + } + return WritableStreamAbort(this, reason); + } + /** + * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its + * close behavior. During this time any further attempts to write will fail (without erroring the stream). + * + * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream + * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with + * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked. + */ + close() { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('close')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer')); + } + if (WritableStreamCloseQueuedOrInFlight(this)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamClose(this); + } + /** + * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream + * is locked, no other writer can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to write to a stream + * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at + * the same time, which would cause the resulting written data to be unpredictable and probably useless. + */ + getWriter() { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('getWriter'); + } + return AcquireWritableStreamDefaultWriter(this); + } +} +Object.defineProperties(WritableStream.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + getWriter: { enumerable: true }, + locked: { enumerable: true } +}); +setFunctionName(WritableStream.prototype.abort, 'abort'); +setFunctionName(WritableStream.prototype.close, 'close'); +setFunctionName(WritableStream.prototype.getWriter, 'getWriter'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, { + value: 'WritableStream', + configurable: true + }); +} +// Abstract operations for the WritableStream. +function AcquireWritableStreamDefaultWriter(stream) { + return new WritableStreamDefaultWriter(stream); +} +// Throws if and only if startAlgorithm throws. +function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(WritableStream.prototype); + InitializeWritableStream(stream); + const controller = Object.create(WritableStreamDefaultController.prototype); + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + return stream; +} +function InitializeWritableStream(stream) { + stream._state = 'writable'; + // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is + // 'erroring' or 'errored'. May be set to an undefined value. + stream._storedError = undefined; + stream._writer = undefined; + // Initialize to undefined first because the constructor of the controller checks this + // variable to validate the caller. + stream._writableStreamController = undefined; + // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data + // producer without waiting for the queued writes to finish. + stream._writeRequests = new SimpleQueue(); + // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents + // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here. + stream._inFlightWriteRequest = undefined; + // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer + // has been detached. + stream._closeRequest = undefined; + // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it + // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here. + stream._inFlightCloseRequest = undefined; + // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached. + stream._pendingAbortRequest = undefined; + // The backpressure signal set by the controller. + stream._backpressure = false; +} +function IsWritableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) { + return false; + } + return x instanceof WritableStream; +} +function IsWritableStreamLocked(stream) { + if (stream._writer === undefined) { + return false; + } + return true; +} +function WritableStreamAbort(stream, reason) { + var _a; + if (stream._state === 'closed' || stream._state === 'errored') { + return promiseResolvedWith(undefined); + } + stream._writableStreamController._abortReason = reason; + (_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort(reason); + // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring', + // but it doesn't know that signaling abort runs author code that might have changed the state. + // Widen the type again by casting to WritableStreamState. + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseResolvedWith(undefined); + } + if (stream._pendingAbortRequest !== undefined) { + return stream._pendingAbortRequest._promise; + } + let wasAlreadyErroring = false; + if (state === 'erroring') { + wasAlreadyErroring = true; + // reason will not be used, so don't keep a reference to it. + reason = undefined; + } + const promise = newPromise((resolve, reject) => { + stream._pendingAbortRequest = { + _promise: undefined, + _resolve: resolve, + _reject: reject, + _reason: reason, + _wasAlreadyErroring: wasAlreadyErroring + }; + }); + stream._pendingAbortRequest._promise = promise; + if (!wasAlreadyErroring) { + WritableStreamStartErroring(stream, reason); + } + return promise; +} +function WritableStreamClose(stream) { + const state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseRejectedWith(new TypeError(`The stream (in ${state} state) is not in the writable state and cannot be closed`)); + } + const promise = newPromise((resolve, reject) => { + const closeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._closeRequest = closeRequest; + }); + const writer = stream._writer; + if (writer !== undefined && stream._backpressure && state === 'writable') { + defaultWriterReadyPromiseResolve(writer); + } + WritableStreamDefaultControllerClose(stream._writableStreamController); + return promise; +} +// WritableStream API exposed for controllers. +function WritableStreamAddWriteRequest(stream) { + const promise = newPromise((resolve, reject) => { + const writeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._writeRequests.push(writeRequest); + }); + return promise; +} +function WritableStreamDealWithRejection(stream, error) { + const state = stream._state; + if (state === 'writable') { + WritableStreamStartErroring(stream, error); + return; + } + WritableStreamFinishErroring(stream); +} +function WritableStreamStartErroring(stream, reason) { + const controller = stream._writableStreamController; + stream._state = 'erroring'; + stream._storedError = reason; + const writer = stream._writer; + if (writer !== undefined) { + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason); + } + if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) { + WritableStreamFinishErroring(stream); + } +} +function WritableStreamFinishErroring(stream) { + stream._state = 'errored'; + stream._writableStreamController[ErrorSteps](); + const storedError = stream._storedError; + stream._writeRequests.forEach(writeRequest => { + writeRequest._reject(storedError); + }); + stream._writeRequests = new SimpleQueue(); + if (stream._pendingAbortRequest === undefined) { + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const abortRequest = stream._pendingAbortRequest; + stream._pendingAbortRequest = undefined; + if (abortRequest._wasAlreadyErroring) { + abortRequest._reject(storedError); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + const promise = stream._writableStreamController[AbortSteps](abortRequest._reason); + uponPromise(promise, () => { + abortRequest._resolve(); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }, (reason) => { + abortRequest._reject(reason); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }); +} +function WritableStreamFinishInFlightWrite(stream) { + stream._inFlightWriteRequest._resolve(undefined); + stream._inFlightWriteRequest = undefined; +} +function WritableStreamFinishInFlightWriteWithError(stream, error) { + stream._inFlightWriteRequest._reject(error); + stream._inFlightWriteRequest = undefined; + WritableStreamDealWithRejection(stream, error); +} +function WritableStreamFinishInFlightClose(stream) { + stream._inFlightCloseRequest._resolve(undefined); + stream._inFlightCloseRequest = undefined; + const state = stream._state; + if (state === 'erroring') { + // The error was too late to do anything, so it is ignored. + stream._storedError = undefined; + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._resolve(); + stream._pendingAbortRequest = undefined; + } + } + stream._state = 'closed'; + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseResolve(writer); + } +} +function WritableStreamFinishInFlightCloseWithError(stream, error) { + stream._inFlightCloseRequest._reject(error); + stream._inFlightCloseRequest = undefined; + // Never execute sink abort() after sink close(). + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._reject(error); + stream._pendingAbortRequest = undefined; + } + WritableStreamDealWithRejection(stream, error); +} +// TODO(ricea): Fix alphabetical order. +function WritableStreamCloseQueuedOrInFlight(stream) { + if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; +} +function WritableStreamHasOperationMarkedInFlight(stream) { + if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; +} +function WritableStreamMarkCloseRequestInFlight(stream) { + stream._inFlightCloseRequest = stream._closeRequest; + stream._closeRequest = undefined; +} +function WritableStreamMarkFirstWriteRequestInFlight(stream) { + stream._inFlightWriteRequest = stream._writeRequests.shift(); +} +function WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) { + if (stream._closeRequest !== undefined) { + stream._closeRequest._reject(stream._storedError); + stream._closeRequest = undefined; + } + const writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseReject(writer, stream._storedError); + } +} +function WritableStreamUpdateBackpressure(stream, backpressure) { + const writer = stream._writer; + if (writer !== undefined && backpressure !== stream._backpressure) { + if (backpressure) { + defaultWriterReadyPromiseReset(writer); + } + else { + defaultWriterReadyPromiseResolve(writer); + } + } + stream._backpressure = backpressure; +} +/** + * A default writer vended by a {@link WritableStream}. + * + * @public + */ +class WritableStreamDefaultWriter { + constructor(stream) { + assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter'); + assertWritableStream(stream, 'First parameter'); + if (IsWritableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive writing by another writer'); + } + this._ownerWritableStream = stream; + stream._writer = this; + const state = stream._state; + if (state === 'writable') { + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) { + defaultWriterReadyPromiseInitialize(this); + } + else { + defaultWriterReadyPromiseInitializeAsResolved(this); + } + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'erroring') { + defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError); + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'closed') { + defaultWriterReadyPromiseInitializeAsResolved(this); + defaultWriterClosedPromiseInitializeAsResolved(this); + } + else { + const storedError = stream._storedError; + defaultWriterReadyPromiseInitializeAsRejected(this, storedError); + defaultWriterClosedPromiseInitializeAsRejected(this, storedError); + } + } + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the writer’s lock is released before the stream finishes closing. + */ + get closed() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('closed')); + } + return this._closedPromise; + } + /** + * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full. + * A producer can use this information to determine the right amount of data to write. + * + * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort + * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when + * the writer’s lock is released. + */ + get desiredSize() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('desiredSize'); + } + if (this._ownerWritableStream === undefined) { + throw defaultWriterLockException('desiredSize'); + } + return WritableStreamDefaultWriterGetDesiredSize(this); + } + /** + * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions + * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips + * back to zero or below, the getter will return a new promise that stays pending until the next transition. + * + * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become + * rejected. + */ + get ready() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('ready')); + } + return this._readyPromise; + } + /** + * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}. + */ + abort(reason = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('abort')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('abort')); + } + return WritableStreamDefaultWriterAbort(this, reason); + } + /** + * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}. + */ + close() { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('close')); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return promiseRejectedWith(defaultWriterLockException('close')); + } + if (WritableStreamCloseQueuedOrInFlight(stream)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamDefaultWriterClose(this); + } + /** + * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active. + * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from + * now on; otherwise, the writer will appear closed. + * + * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the + * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled). + * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents + * other producers from writing in an interleaved manner. + */ + releaseLock() { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('releaseLock'); + } + const stream = this._ownerWritableStream; + if (stream === undefined) { + return; + } + WritableStreamDefaultWriterRelease(this); + } + write(chunk = undefined) { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('write')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + return WritableStreamDefaultWriterWrite(this, chunk); + } +} +Object.defineProperties(WritableStreamDefaultWriter.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + releaseLock: { enumerable: true }, + write: { enumerable: true }, + closed: { enumerable: true }, + desiredSize: { enumerable: true }, + ready: { enumerable: true } +}); +setFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort'); +setFunctionName(WritableStreamDefaultWriter.prototype.close, 'close'); +setFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock'); +setFunctionName(WritableStreamDefaultWriter.prototype.write, 'write'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultWriter', + configurable: true + }); +} +// Abstract operations for the WritableStreamDefaultWriter. +function IsWritableStreamDefaultWriter(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultWriter; +} +// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check. +function WritableStreamDefaultWriterAbort(writer, reason) { + const stream = writer._ownerWritableStream; + return WritableStreamAbort(stream, reason); +} +function WritableStreamDefaultWriterClose(writer) { + const stream = writer._ownerWritableStream; + return WritableStreamClose(stream); +} +function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseResolvedWith(undefined); + } + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + return WritableStreamDefaultWriterClose(writer); +} +function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) { + if (writer._closedPromiseState === 'pending') { + defaultWriterClosedPromiseReject(writer, error); + } + else { + defaultWriterClosedPromiseResetToRejected(writer, error); + } +} +function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) { + if (writer._readyPromiseState === 'pending') { + defaultWriterReadyPromiseReject(writer, error); + } + else { + defaultWriterReadyPromiseResetToRejected(writer, error); + } +} +function WritableStreamDefaultWriterGetDesiredSize(writer) { + const stream = writer._ownerWritableStream; + const state = stream._state; + if (state === 'errored' || state === 'erroring') { + return null; + } + if (state === 'closed') { + return 0; + } + return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController); +} +function WritableStreamDefaultWriterRelease(writer) { + const stream = writer._ownerWritableStream; + const releasedError = new TypeError(`Writer was released and can no longer be used to monitor the stream's closedness`); + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError); + // The state transitions to "errored" before the sink abort() method runs, but the writer.closed promise is not + // rejected until afterwards. This means that simply testing state will not work. + WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError); + stream._writer = undefined; + writer._ownerWritableStream = undefined; +} +function WritableStreamDefaultWriterWrite(writer, chunk) { + const stream = writer._ownerWritableStream; + const controller = stream._writableStreamController; + const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk); + if (stream !== writer._ownerWritableStream) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + const state = stream._state; + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to')); + } + if (state === 'erroring') { + return promiseRejectedWith(stream._storedError); + } + const promise = WritableStreamAddWriteRequest(stream); + WritableStreamDefaultControllerWrite(controller, chunk, chunkSize); + return promise; +} +const closeSentinel = {}; +/** + * Allows control of a {@link WritableStream | writable stream}'s state and internal queue. + * + * @public + */ +class WritableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted. + * + * @deprecated + * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177. + * Use {@link WritableStreamDefaultController.signal}'s `reason` instead. + */ + get abortReason() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('abortReason'); + } + return this._abortReason; + } + /** + * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted. + */ + get signal() { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('signal'); + } + if (this._abortController === undefined) { + // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`. + // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill, + // so instead we only implement support for `signal` if we find a global `AbortController` constructor. + throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported'); + } + return this._abortController.signal; + } + /** + * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`. + * + * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying + * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the + * normal lifecycle of interactions with the underlying sink. + */ + error(e = undefined) { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('error'); + } + const state = this._controlledWritableStream._state; + if (state !== 'writable') { + // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so + // just treat it as a no-op. + return; + } + WritableStreamDefaultControllerError(this, e); + } + /** @internal */ + [AbortSteps](reason) { + const result = this._abortAlgorithm(reason); + WritableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [ErrorSteps]() { + ResetQueue(this); + } +} +Object.defineProperties(WritableStreamDefaultController.prototype, { + abortReason: { enumerable: true }, + signal: { enumerable: true }, + error: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'WritableStreamDefaultController', + configurable: true + }); +} +// Abstract operations implementing interface required by the WritableStream. +function IsWritableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultController; +} +function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledWritableStream = stream; + stream._writableStreamController = controller; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._abortReason = undefined; + controller._abortController = createAbortController(); + controller._started = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._writeAlgorithm = writeAlgorithm; + controller._closeAlgorithm = closeAlgorithm; + controller._abortAlgorithm = abortAlgorithm; + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + const startResult = startAlgorithm(); + const startPromise = promiseResolvedWith(startResult); + uponPromise(startPromise, () => { + controller._started = true; + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, r => { + controller._started = true; + WritableStreamDealWithRejection(stream, r); + return null; + }); +} +function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) { + const controller = Object.create(WritableStreamDefaultController.prototype); + let startAlgorithm; + let writeAlgorithm; + let closeAlgorithm; + let abortAlgorithm; + if (underlyingSink.start !== undefined) { + startAlgorithm = () => underlyingSink.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSink.write !== undefined) { + writeAlgorithm = chunk => underlyingSink.write(chunk, controller); + } + else { + writeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.close !== undefined) { + closeAlgorithm = () => underlyingSink.close(); + } + else { + closeAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSink.abort !== undefined) { + abortAlgorithm = reason => underlyingSink.abort(reason); + } + else { + abortAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); +} +// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls. +function WritableStreamDefaultControllerClearAlgorithms(controller) { + controller._writeAlgorithm = undefined; + controller._closeAlgorithm = undefined; + controller._abortAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; +} +function WritableStreamDefaultControllerClose(controller) { + EnqueueValueWithSize(controller, closeSentinel, 0); + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); +} +function WritableStreamDefaultControllerGetChunkSize(controller, chunk) { + try { + return controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE); + return 1; + } +} +function WritableStreamDefaultControllerGetDesiredSize(controller) { + return controller._strategyHWM - controller._queueTotalSize; +} +function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) { + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE); + return; + } + const stream = controller._controlledWritableStream; + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); +} +// Abstract operations for the WritableStreamDefaultController. +function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) { + const stream = controller._controlledWritableStream; + if (!controller._started) { + return; + } + if (stream._inFlightWriteRequest !== undefined) { + return; + } + const state = stream._state; + if (state === 'erroring') { + WritableStreamFinishErroring(stream); + return; + } + if (controller._queue.length === 0) { + return; + } + const value = PeekQueueValue(controller); + if (value === closeSentinel) { + WritableStreamDefaultControllerProcessClose(controller); + } + else { + WritableStreamDefaultControllerProcessWrite(controller, value); + } +} +function WritableStreamDefaultControllerErrorIfNeeded(controller, error) { + if (controller._controlledWritableStream._state === 'writable') { + WritableStreamDefaultControllerError(controller, error); + } +} +function WritableStreamDefaultControllerProcessClose(controller) { + const stream = controller._controlledWritableStream; + WritableStreamMarkCloseRequestInFlight(stream); + DequeueValue(controller); + const sinkClosePromise = controller._closeAlgorithm(); + WritableStreamDefaultControllerClearAlgorithms(controller); + uponPromise(sinkClosePromise, () => { + WritableStreamFinishInFlightClose(stream); + return null; + }, reason => { + WritableStreamFinishInFlightCloseWithError(stream, reason); + return null; + }); +} +function WritableStreamDefaultControllerProcessWrite(controller, chunk) { + const stream = controller._controlledWritableStream; + WritableStreamMarkFirstWriteRequestInFlight(stream); + const sinkWritePromise = controller._writeAlgorithm(chunk); + uponPromise(sinkWritePromise, () => { + WritableStreamFinishInFlightWrite(stream); + const state = stream._state; + DequeueValue(controller); + if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') { + const backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, reason => { + if (stream._state === 'writable') { + WritableStreamDefaultControllerClearAlgorithms(controller); + } + WritableStreamFinishInFlightWriteWithError(stream, reason); + return null; + }); +} +function WritableStreamDefaultControllerGetBackpressure(controller) { + const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller); + return desiredSize <= 0; +} +// A client of WritableStreamDefaultController may use these functions directly to bypass state check. +function WritableStreamDefaultControllerError(controller, error) { + const stream = controller._controlledWritableStream; + WritableStreamDefaultControllerClearAlgorithms(controller); + WritableStreamStartErroring(stream, error); +} +// Helper functions for the WritableStream. +function streamBrandCheckException$2(name) { + return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`); +} +// Helper functions for the WritableStreamDefaultController. +function defaultControllerBrandCheckException$2(name) { + return new TypeError(`WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`); +} +// Helper functions for the WritableStreamDefaultWriter. +function defaultWriterBrandCheckException(name) { + return new TypeError(`WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`); +} +function defaultWriterLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released writer'); +} +function defaultWriterClosedPromiseInitialize(writer) { + writer._closedPromise = newPromise((resolve, reject) => { + writer._closedPromise_resolve = resolve; + writer._closedPromise_reject = reject; + writer._closedPromiseState = 'pending'; + }); +} +function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseReject(writer, reason); +} +function defaultWriterClosedPromiseInitializeAsResolved(writer) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseResolve(writer); +} +function defaultWriterClosedPromiseReject(writer, reason) { + if (writer._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._closedPromise); + writer._closedPromise_reject(reason); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'rejected'; +} +function defaultWriterClosedPromiseResetToRejected(writer, reason) { + defaultWriterClosedPromiseInitializeAsRejected(writer, reason); +} +function defaultWriterClosedPromiseResolve(writer) { + if (writer._closedPromise_resolve === undefined) { + return; + } + writer._closedPromise_resolve(undefined); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'resolved'; +} +function defaultWriterReadyPromiseInitialize(writer) { + writer._readyPromise = newPromise((resolve, reject) => { + writer._readyPromise_resolve = resolve; + writer._readyPromise_reject = reject; + }); + writer._readyPromiseState = 'pending'; +} +function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseReject(writer, reason); +} +function defaultWriterReadyPromiseInitializeAsResolved(writer) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseResolve(writer); +} +function defaultWriterReadyPromiseReject(writer, reason) { + if (writer._readyPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._readyPromise); + writer._readyPromise_reject(reason); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'rejected'; +} +function defaultWriterReadyPromiseReset(writer) { + defaultWriterReadyPromiseInitialize(writer); +} +function defaultWriterReadyPromiseResetToRejected(writer, reason) { + defaultWriterReadyPromiseInitializeAsRejected(writer, reason); +} +function defaultWriterReadyPromiseResolve(writer) { + if (writer._readyPromise_resolve === undefined) { + return; + } + writer._readyPromise_resolve(undefined); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'fulfilled'; +} + +/// +function getGlobals() { + if (typeof globalThis !== 'undefined') { + return globalThis; + } + else if (typeof self !== 'undefined') { + return self; + } + else if (typeof global !== 'undefined') { + return global; + } + return undefined; +} +const globals = getGlobals(); + +/// +function isDOMExceptionConstructor(ctor) { + if (!(typeof ctor === 'function' || typeof ctor === 'object')) { + return false; + } + if (ctor.name !== 'DOMException') { + return false; + } + try { + new ctor(); + return true; + } + catch (_a) { + return false; + } +} +/** + * Support: + * - Web browsers + * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87) + */ +function getFromGlobal() { + const ctor = globals === null || globals === void 0 ? void 0 : globals.DOMException; + return isDOMExceptionConstructor(ctor) ? ctor : undefined; +} +/** + * Support: + * - All platforms + */ +function createPolyfill() { + // eslint-disable-next-line @typescript-eslint/no-shadow + const ctor = function DOMException(message, name) { + this.message = message || ''; + this.name = name || 'Error'; + if (Error.captureStackTrace) { + Error.captureStackTrace(this, this.constructor); + } + }; + setFunctionName(ctor, 'DOMException'); + ctor.prototype = Object.create(Error.prototype); + Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true }); + return ctor; +} +// eslint-disable-next-line @typescript-eslint/no-redeclare +const DOMException = getFromGlobal() || createPolyfill(); + +function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) { + const reader = AcquireReadableStreamDefaultReader(source); + const writer = AcquireWritableStreamDefaultWriter(dest); + source._disturbed = true; + let shuttingDown = false; + // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown. + let currentWrite = promiseResolvedWith(undefined); + return newPromise((resolve, reject) => { + let abortAlgorithm; + if (signal !== undefined) { + abortAlgorithm = () => { + const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError'); + const actions = []; + if (!preventAbort) { + actions.push(() => { + if (dest._state === 'writable') { + return WritableStreamAbort(dest, error); + } + return promiseResolvedWith(undefined); + }); + } + if (!preventCancel) { + actions.push(() => { + if (source._state === 'readable') { + return ReadableStreamCancel(source, error); + } + return promiseResolvedWith(undefined); + }); + } + shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error); + }; + if (signal.aborted) { + abortAlgorithm(); + return; + } + signal.addEventListener('abort', abortAlgorithm); + } + // Using reader and writer, read all chunks from this and write them to dest + // - Backpressure must be enforced + // - Shutdown must stop all activity + function pipeLoop() { + return newPromise((resolveLoop, rejectLoop) => { + function next(done) { + if (done) { + resolveLoop(); + } + else { + // Use `PerformPromiseThen` instead of `uponPromise` to avoid + // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers + PerformPromiseThen(pipeStep(), next, rejectLoop); + } + } + next(false); + }); + } + function pipeStep() { + if (shuttingDown) { + return promiseResolvedWith(true); + } + return PerformPromiseThen(writer._readyPromise, () => { + return newPromise((resolveRead, rejectRead) => { + ReadableStreamDefaultReaderRead(reader, { + _chunkSteps: chunk => { + currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop); + resolveRead(false); + }, + _closeSteps: () => resolveRead(true), + _errorSteps: rejectRead + }); + }); + }); + } + // Errors must be propagated forward + isOrBecomesErrored(source, reader._closedPromise, storedError => { + if (!preventAbort) { + shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Errors must be propagated backward + isOrBecomesErrored(dest, writer._closedPromise, storedError => { + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Closing must be propagated forward + isOrBecomesClosed(source, reader._closedPromise, () => { + if (!preventClose) { + shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer)); + } + else { + shutdown(); + } + return null; + }); + // Closing must be propagated backward + if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') { + const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it'); + if (!preventCancel) { + shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed); + } + else { + shutdown(true, destClosed); + } + } + setPromiseIsHandledToTrue(pipeLoop()); + function waitForWritesToFinish() { + // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait + // for that too. + const oldCurrentWrite = currentWrite; + return PerformPromiseThen(currentWrite, () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined); + } + function isOrBecomesErrored(stream, promise, action) { + if (stream._state === 'errored') { + action(stream._storedError); + } + else { + uponRejection(promise, action); + } + } + function isOrBecomesClosed(stream, promise, action) { + if (stream._state === 'closed') { + action(); + } + else { + uponFulfillment(promise, action); + } + } + function shutdownWithAction(action, originalIsError, originalError) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), doTheRest); + } + else { + doTheRest(); + } + function doTheRest() { + uponPromise(action(), () => finalize(originalIsError, originalError), newError => finalize(true, newError)); + return null; + } + } + function shutdown(isError, error) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error)); + } + else { + finalize(isError, error); + } + } + function finalize(isError, error) { + WritableStreamDefaultWriterRelease(writer); + ReadableStreamReaderGenericRelease(reader); + if (signal !== undefined) { + signal.removeEventListener('abort', abortAlgorithm); + } + if (isError) { + reject(error); + } + else { + resolve(undefined); + } + return null; + } + }); +} + +/** + * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue. + * + * @public + */ +class ReadableStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('desiredSize'); + } + return ReadableStreamDefaultControllerGetDesiredSize(this); + } + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close() { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('close'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits close'); + } + ReadableStreamDefaultControllerClose(this); + } + enqueue(chunk = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('enqueue'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits enqueue'); + } + return ReadableStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e = undefined) { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('error'); + } + ReadableStreamDefaultControllerError(this, e); + } + /** @internal */ + [CancelSteps](reason) { + ResetQueue(this); + const result = this._cancelAlgorithm(reason); + ReadableStreamDefaultControllerClearAlgorithms(this); + return result; + } + /** @internal */ + [PullSteps](readRequest) { + const stream = this._controlledReadableStream; + if (this._queue.length > 0) { + const chunk = DequeueValue(this); + if (this._closeRequested && this._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(this); + ReadableStreamClose(stream); + } + else { + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + readRequest._chunkSteps(chunk); + } + else { + ReadableStreamAddReadRequest(stream, readRequest); + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + } + /** @internal */ + [ReleaseSteps]() { + // Do nothing. + } +} +Object.defineProperties(ReadableStreamDefaultController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(ReadableStreamDefaultController.prototype.close, 'close'); +setFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue'); +setFunctionName(ReadableStreamDefaultController.prototype.error, 'error'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'ReadableStreamDefaultController', + configurable: true + }); +} +// Abstract operations for the ReadableStreamDefaultController. +function IsReadableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) { + return false; + } + return x instanceof ReadableStreamDefaultController; +} +function ReadableStreamDefaultControllerCallPullIfNeeded(controller) { + const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + const pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, () => { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + return null; + }, e => { + ReadableStreamDefaultControllerError(controller, e); + return null; + }); +} +function ReadableStreamDefaultControllerShouldCallPull(controller) { + const stream = controller._controlledReadableStream; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return false; + } + if (!controller._started) { + return false; + } + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; +} +function ReadableStreamDefaultControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; +} +// A client of ReadableStreamDefaultController may use these functions directly to bypass state check. +function ReadableStreamDefaultControllerClose(controller) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + controller._closeRequested = true; + if (controller._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } +} +function ReadableStreamDefaultControllerEnqueue(controller, chunk) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + const stream = controller._controlledReadableStream; + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + ReadableStreamFulfillReadRequest(stream, chunk, false); + } + else { + let chunkSize; + try { + chunkSize = controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + ReadableStreamDefaultControllerError(controller, chunkSizeE); + throw chunkSizeE; + } + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + ReadableStreamDefaultControllerError(controller, enqueueE); + throw enqueueE; + } + } + ReadableStreamDefaultControllerCallPullIfNeeded(controller); +} +function ReadableStreamDefaultControllerError(controller, e) { + const stream = controller._controlledReadableStream; + if (stream._state !== 'readable') { + return; + } + ResetQueue(controller); + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); +} +function ReadableStreamDefaultControllerGetDesiredSize(controller) { + const state = controller._controlledReadableStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; +} +// This is used in the implementation of TransformStream. +function ReadableStreamDefaultControllerHasBackpressure(controller) { + if (ReadableStreamDefaultControllerShouldCallPull(controller)) { + return false; + } + return true; +} +function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) { + const state = controller._controlledReadableStream._state; + if (!controller._closeRequested && state === 'readable') { + return true; + } + return false; +} +function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledReadableStream = stream; + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._started = false; + controller._closeRequested = false; + controller._pullAgain = false; + controller._pulling = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + stream._readableStreamController = controller; + const startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), () => { + controller._started = true; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + return null; + }, r => { + ReadableStreamDefaultControllerError(controller, r); + return null; + }); +} +function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) { + const controller = Object.create(ReadableStreamDefaultController.prototype); + let startAlgorithm; + let pullAlgorithm; + let cancelAlgorithm; + if (underlyingSource.start !== undefined) { + startAlgorithm = () => underlyingSource.start(controller); + } + else { + startAlgorithm = () => undefined; + } + if (underlyingSource.pull !== undefined) { + pullAlgorithm = () => underlyingSource.pull(controller); + } + else { + pullAlgorithm = () => promiseResolvedWith(undefined); + } + if (underlyingSource.cancel !== undefined) { + cancelAlgorithm = reason => underlyingSource.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); +} +// Helper functions for the ReadableStreamDefaultController. +function defaultControllerBrandCheckException$1(name) { + return new TypeError(`ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`); +} + +function ReadableStreamTee(stream, cloneForBranch2) { + if (IsReadableByteStreamController(stream._readableStreamController)) { + return ReadableByteStreamTee(stream); + } + return ReadableStreamDefaultTee(stream); +} +function ReadableStreamDefaultTee(stream, cloneForBranch2) { + const reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgain = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function pullAlgorithm() { + if (reading) { + readAgain = true; + return promiseResolvedWith(undefined); + } + reading = true; + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgain = false; + const chunk1 = chunk; + const chunk2 = chunk; + // There is no way to access the cloning code right now in the reference implementation. + // If we add one then we'll need an implementation for serializable objects. + // if (!canceled2 && cloneForBranch2) { + // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2)); + // } + if (!canceled1) { + ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgain) { + pullAlgorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableStreamDefaultControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableStreamDefaultControllerClose(branch2._readableStreamController); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + // do nothing + } + branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm); + branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm); + uponRejection(reader._closedPromise, (r) => { + ReadableStreamDefaultControllerError(branch1._readableStreamController, r); + ReadableStreamDefaultControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + return [branch1, branch2]; +} +function ReadableByteStreamTee(stream) { + let reader = AcquireReadableStreamDefaultReader(stream); + let reading = false; + let readAgainForBranch1 = false; + let readAgainForBranch2 = false; + let canceled1 = false; + let canceled2 = false; + let reason1; + let reason2; + let branch1; + let branch2; + let resolveCancelPromise; + const cancelPromise = newPromise(resolve => { + resolveCancelPromise = resolve; + }); + function forwardReaderError(thisReader) { + uponRejection(thisReader._closedPromise, r => { + if (thisReader !== reader) { + return null; + } + ReadableByteStreamControllerError(branch1._readableStreamController, r); + ReadableByteStreamControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + } + function pullWithDefaultReader() { + if (IsReadableStreamBYOBReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamDefaultReader(stream); + forwardReaderError(reader); + } + const readRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const chunk1 = chunk; + let chunk2 = chunk; + if (!canceled1 && !canceled2) { + try { + chunk2 = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(branch1._readableStreamController, cloneE); + ReadableByteStreamControllerError(branch2._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + } + if (!canceled1) { + ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: () => { + reading = false; + if (!canceled1) { + ReadableByteStreamControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableByteStreamControllerClose(branch2._readableStreamController); + } + if (branch1._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch1._readableStreamController, 0); + } + if (branch2._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch2._readableStreamController, 0); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + } + function pullWithBYOBReader(view, forBranch2) { + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamBYOBReader(stream); + forwardReaderError(reader); + } + const byobBranch = forBranch2 ? branch2 : branch1; + const otherBranch = forBranch2 ? branch1 : branch2; + const readIntoRequest = { + _chunkSteps: chunk => { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(() => { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!otherCanceled) { + let clonedChunk; + try { + clonedChunk = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE); + ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk); + } + else if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: chunk => { + reading = false; + const byobCanceled = forBranch2 ? canceled2 : canceled1; + const otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!byobCanceled) { + ReadableByteStreamControllerClose(byobBranch._readableStreamController); + } + if (!otherCanceled) { + ReadableByteStreamControllerClose(otherBranch._readableStreamController); + } + if (chunk !== undefined) { + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0); + } + } + if (!byobCanceled || !otherCanceled) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: () => { + reading = false; + } + }; + ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest); + } + function pull1Algorithm() { + if (reading) { + readAgainForBranch1 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, false); + } + return promiseResolvedWith(undefined); + } + function pull2Algorithm() { + if (reading) { + readAgainForBranch2 = true; + return promiseResolvedWith(undefined); + } + reading = true; + const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, true); + } + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + const compositeReason = CreateArrayFromList([reason1, reason2]); + const cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + return; + } + branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm); + branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm); + forwardReaderError(reader); + return [branch1, branch2]; +} + +function isReadableStreamLike(stream) { + return typeIsObject(stream) && typeof stream.getReader !== 'undefined'; +} + +function ReadableStreamFrom(source) { + if (isReadableStreamLike(source)) { + return ReadableStreamFromDefaultReader(source.getReader()); + } + return ReadableStreamFromIterable(source); +} +function ReadableStreamFromIterable(asyncIterable) { + let stream; + const iteratorRecord = GetIterator(asyncIterable, 'async'); + const startAlgorithm = noop; + function pullAlgorithm() { + let nextResult; + try { + nextResult = IteratorNext(iteratorRecord); + } + catch (e) { + return promiseRejectedWith(e); + } + const nextPromise = promiseResolvedWith(nextResult); + return transformPromiseWith(nextPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object'); + } + const done = IteratorComplete(iterResult); + if (done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = IteratorValue(iterResult); + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + const iterator = iteratorRecord.iterator; + let returnMethod; + try { + returnMethod = GetMethod(iterator, 'return'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (returnMethod === undefined) { + return promiseResolvedWith(undefined); + } + let returnResult; + try { + returnResult = reflectCall(returnMethod, iterator, [reason]); + } + catch (e) { + return promiseRejectedWith(e); + } + const returnPromise = promiseResolvedWith(returnResult); + return transformPromiseWith(returnPromise, iterResult => { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object'); + } + return undefined; + }); + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; +} +function ReadableStreamFromDefaultReader(reader) { + let stream; + const startAlgorithm = noop; + function pullAlgorithm() { + let readPromise; + try { + readPromise = reader.read(); + } + catch (e) { + return promiseRejectedWith(e); + } + return transformPromiseWith(readPromise, readResult => { + if (!typeIsObject(readResult)) { + throw new TypeError('The promise returned by the reader.read() method must fulfill with an object'); + } + if (readResult.done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + const value = readResult.value; + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + try { + return promiseResolvedWith(reader.cancel(reason)); + } + catch (e) { + return promiseRejectedWith(e); + } + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; +} + +function convertUnderlyingDefaultOrByteSource(source, context) { + assertDictionary(source, context); + const original = source; + const autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize; + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const pull = original === null || original === void 0 ? void 0 : original.pull; + const start = original === null || original === void 0 ? void 0 : original.start; + const type = original === null || original === void 0 ? void 0 : original.type; + return { + autoAllocateChunkSize: autoAllocateChunkSize === undefined ? + undefined : + convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, `${context} has member 'autoAllocateChunkSize' that`), + cancel: cancel === undefined ? + undefined : + convertUnderlyingSourceCancelCallback(cancel, original, `${context} has member 'cancel' that`), + pull: pull === undefined ? + undefined : + convertUnderlyingSourcePullCallback(pull, original, `${context} has member 'pull' that`), + start: start === undefined ? + undefined : + convertUnderlyingSourceStartCallback(start, original, `${context} has member 'start' that`), + type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`) + }; +} +function convertUnderlyingSourceCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); +} +function convertUnderlyingSourcePullCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); +} +function convertUnderlyingSourceStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); +} +function convertReadableStreamType(type, context) { + type = `${type}`; + if (type !== 'bytes') { + throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`); + } + return type; +} + +function convertIteratorOptions(options, context) { + assertDictionary(options, context); + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + return { preventCancel: Boolean(preventCancel) }; +} + +function convertPipeOptions(options, context) { + assertDictionary(options, context); + const preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort; + const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + const preventClose = options === null || options === void 0 ? void 0 : options.preventClose; + const signal = options === null || options === void 0 ? void 0 : options.signal; + if (signal !== undefined) { + assertAbortSignal(signal, `${context} has member 'signal' that`); + } + return { + preventAbort: Boolean(preventAbort), + preventCancel: Boolean(preventCancel), + preventClose: Boolean(preventClose), + signal + }; +} +function assertAbortSignal(signal, context) { + if (!isAbortSignal(signal)) { + throw new TypeError(`${context} is not an AbortSignal.`); + } +} + +function convertReadableWritablePair(pair, context) { + assertDictionary(pair, context); + const readable = pair === null || pair === void 0 ? void 0 : pair.readable; + assertRequiredField(readable, 'readable', 'ReadableWritablePair'); + assertReadableStream(readable, `${context} has member 'readable' that`); + const writable = pair === null || pair === void 0 ? void 0 : pair.writable; + assertRequiredField(writable, 'writable', 'ReadableWritablePair'); + assertWritableStream(writable, `${context} has member 'writable' that`); + return { readable, writable }; +} + +/** + * A readable stream represents a source of data, from which you can read. + * + * @public + */ +class ReadableStream { + constructor(rawUnderlyingSource = {}, rawStrategy = {}) { + if (rawUnderlyingSource === undefined) { + rawUnderlyingSource = null; + } + else { + assertObject(rawUnderlyingSource, 'First parameter'); + } + const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter'); + InitializeReadableStream(this); + if (underlyingSource.type === 'bytes') { + if (strategy.size !== undefined) { + throw new RangeError('The strategy for a byte stream cannot have a size function'); + } + const highWaterMark = ExtractHighWaterMark(strategy, 0); + SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark); + } + else { + const sizeAlgorithm = ExtractSizeAlgorithm(strategy); + const highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm); + } + } + /** + * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}. + */ + get locked() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('locked'); + } + return IsReadableStreamLocked(this); + } + /** + * Cancels the stream, signaling a loss of interest in the stream by a consumer. + * + * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()} + * method, which might or might not use it. + */ + cancel(reason = undefined) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('cancel')); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader')); + } + return ReadableStreamCancel(this, reason); + } + getReader(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('getReader'); + } + const options = convertReaderOptions(rawOptions, 'First parameter'); + if (options.mode === undefined) { + return AcquireReadableStreamDefaultReader(this); + } + return AcquireReadableStreamBYOBReader(this); + } + pipeThrough(rawTransform, rawOptions = {}) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('pipeThrough'); + } + assertRequiredArgument(rawTransform, 1, 'pipeThrough'); + const transform = convertReadableWritablePair(rawTransform, 'First parameter'); + const options = convertPipeOptions(rawOptions, 'Second parameter'); + if (IsReadableStreamLocked(this)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream'); + } + if (IsWritableStreamLocked(transform.writable)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream'); + } + const promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + setPromiseIsHandledToTrue(promise); + return transform.readable; + } + pipeTo(destination, rawOptions = {}) { + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('pipeTo')); + } + if (destination === undefined) { + return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`); + } + if (!IsWritableStream(destination)) { + return promiseRejectedWith(new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)); + } + let options; + try { + options = convertPipeOptions(rawOptions, 'Second parameter'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')); + } + if (IsWritableStreamLocked(destination)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')); + } + return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + } + /** + * Tees this readable stream, returning a two-element array containing the two resulting branches as + * new {@link ReadableStream} instances. + * + * Teeing a stream will lock it, preventing any other consumer from acquiring a reader. + * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be + * propagated to the stream's underlying source. + * + * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable, + * this could allow interference between the two branches. + */ + tee() { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('tee'); + } + const branches = ReadableStreamTee(this); + return CreateArrayFromList(branches); + } + values(rawOptions = undefined) { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('values'); + } + const options = convertIteratorOptions(rawOptions, 'First parameter'); + return AcquireReadableStreamAsyncIterator(this, options.preventCancel); + } + [SymbolAsyncIterator](options) { + // Stub implementation, overridden below + return this.values(options); + } + /** + * Creates a new ReadableStream wrapping the provided iterable or async iterable. + * + * This can be used to adapt various kinds of objects into a readable stream, + * such as an array, an async generator, or a Node.js readable stream. + */ + static from(asyncIterable) { + return ReadableStreamFrom(asyncIterable); + } +} +Object.defineProperties(ReadableStream, { + from: { enumerable: true } +}); +Object.defineProperties(ReadableStream.prototype, { + cancel: { enumerable: true }, + getReader: { enumerable: true }, + pipeThrough: { enumerable: true }, + pipeTo: { enumerable: true }, + tee: { enumerable: true }, + values: { enumerable: true }, + locked: { enumerable: true } +}); +setFunctionName(ReadableStream.from, 'from'); +setFunctionName(ReadableStream.prototype.cancel, 'cancel'); +setFunctionName(ReadableStream.prototype.getReader, 'getReader'); +setFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough'); +setFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo'); +setFunctionName(ReadableStream.prototype.tee, 'tee'); +setFunctionName(ReadableStream.prototype.values, 'values'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, { + value: 'ReadableStream', + configurable: true + }); +} +Object.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, { + value: ReadableStream.prototype.values, + writable: true, + configurable: true +}); +// Abstract operations for the ReadableStream. +// Throws if and only if startAlgorithm throws. +function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableStreamDefaultController.prototype); + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + return stream; +} +// Throws if and only if startAlgorithm throws. +function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) { + const stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + const controller = Object.create(ReadableByteStreamController.prototype); + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined); + return stream; +} +function InitializeReadableStream(stream) { + stream._state = 'readable'; + stream._reader = undefined; + stream._storedError = undefined; + stream._disturbed = false; +} +function IsReadableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) { + return false; + } + return x instanceof ReadableStream; +} +function IsReadableStreamLocked(stream) { + if (stream._reader === undefined) { + return false; + } + return true; +} +// ReadableStream API exposed for controllers. +function ReadableStreamCancel(stream, reason) { + stream._disturbed = true; + if (stream._state === 'closed') { + return promiseResolvedWith(undefined); + } + if (stream._state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + ReadableStreamClose(stream); + const reader = stream._reader; + if (reader !== undefined && IsReadableStreamBYOBReader(reader)) { + const readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(readIntoRequest => { + readIntoRequest._closeSteps(undefined); + }); + } + const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason); + return transformPromiseWith(sourceCancelPromise, noop); +} +function ReadableStreamClose(stream) { + stream._state = 'closed'; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseResolve(reader); + if (IsReadableStreamDefaultReader(reader)) { + const readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(readRequest => { + readRequest._closeSteps(); + }); + } +} +function ReadableStreamError(stream, e) { + stream._state = 'errored'; + stream._storedError = e; + const reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseReject(reader, e); + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + else { + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } +} +// Helper functions for the ReadableStream. +function streamBrandCheckException$1(name) { + return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`); +} + +function convertQueuingStrategyInit(init, context) { + assertDictionary(init, context); + const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit'); + return { + highWaterMark: convertUnrestrictedDouble(highWaterMark) + }; +} + +// The size function must not have a prototype property nor be a constructor +const byteLengthSizeFunction = (chunk) => { + return chunk.byteLength; +}; +setFunctionName(byteLengthSizeFunction, 'size'); +/** + * A queuing strategy that counts the number of bytes in each chunk. + * + * @public + */ +class ByteLengthQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('highWaterMark'); + } + return this._byteLengthQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by returning the value of its `byteLength` property. + */ + get size() { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('size'); + } + return byteLengthSizeFunction; + } +} +Object.defineProperties(ByteLengthQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'ByteLengthQueuingStrategy', + configurable: true + }); +} +// Helper functions for the ByteLengthQueuingStrategy. +function byteLengthBrandCheckException(name) { + return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`); +} +function IsByteLengthQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof ByteLengthQueuingStrategy; +} + +// The size function must not have a prototype property nor be a constructor +const countSizeFunction = () => { + return 1; +}; +setFunctionName(countSizeFunction, 'size'); +/** + * A queuing strategy that counts the number of chunks. + * + * @public + */ +class CountQueuingStrategy { + constructor(options) { + assertRequiredArgument(options, 1, 'CountQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._countQueuingStrategyHighWaterMark = options.highWaterMark; + } + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('highWaterMark'); + } + return this._countQueuingStrategyHighWaterMark; + } + /** + * Measures the size of `chunk` by always returning 1. + * This ensures that the total queue size is a count of the number of chunks in the queue. + */ + get size() { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('size'); + } + return countSizeFunction; + } +} +Object.defineProperties(CountQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, { + value: 'CountQueuingStrategy', + configurable: true + }); +} +// Helper functions for the CountQueuingStrategy. +function countBrandCheckException(name) { + return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`); +} +function IsCountQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof CountQueuingStrategy; +} + +function convertTransformer(original, context) { + assertDictionary(original, context); + const cancel = original === null || original === void 0 ? void 0 : original.cancel; + const flush = original === null || original === void 0 ? void 0 : original.flush; + const readableType = original === null || original === void 0 ? void 0 : original.readableType; + const start = original === null || original === void 0 ? void 0 : original.start; + const transform = original === null || original === void 0 ? void 0 : original.transform; + const writableType = original === null || original === void 0 ? void 0 : original.writableType; + return { + cancel: cancel === undefined ? + undefined : + convertTransformerCancelCallback(cancel, original, `${context} has member 'cancel' that`), + flush: flush === undefined ? + undefined : + convertTransformerFlushCallback(flush, original, `${context} has member 'flush' that`), + readableType, + start: start === undefined ? + undefined : + convertTransformerStartCallback(start, original, `${context} has member 'start' that`), + transform: transform === undefined ? + undefined : + convertTransformerTransformCallback(transform, original, `${context} has member 'transform' that`), + writableType + }; +} +function convertTransformerFlushCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => promiseCall(fn, original, [controller]); +} +function convertTransformerStartCallback(fn, original, context) { + assertFunction(fn, context); + return (controller) => reflectCall(fn, original, [controller]); +} +function convertTransformerTransformCallback(fn, original, context) { + assertFunction(fn, context); + return (chunk, controller) => promiseCall(fn, original, [chunk, controller]); +} +function convertTransformerCancelCallback(fn, original, context) { + assertFunction(fn, context); + return (reason) => promiseCall(fn, original, [reason]); +} + +// Class TransformStream +/** + * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream}, + * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side. + * In a manner specific to the transform stream in question, writes to the writable side result in new data being + * made available for reading from the readable side. + * + * @public + */ +class TransformStream { + constructor(rawTransformer = {}, rawWritableStrategy = {}, rawReadableStrategy = {}) { + if (rawTransformer === undefined) { + rawTransformer = null; + } + const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter'); + const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter'); + const transformer = convertTransformer(rawTransformer, 'First parameter'); + if (transformer.readableType !== undefined) { + throw new RangeError('Invalid readableType specified'); + } + if (transformer.writableType !== undefined) { + throw new RangeError('Invalid writableType specified'); + } + const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0); + const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy); + const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1); + const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy); + let startPromise_resolve; + const startPromise = newPromise(resolve => { + startPromise_resolve = resolve; + }); + InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + SetUpTransformStreamDefaultControllerFromTransformer(this, transformer); + if (transformer.start !== undefined) { + startPromise_resolve(transformer.start(this._transformStreamController)); + } + else { + startPromise_resolve(undefined); + } + } + /** + * The readable side of the transform stream. + */ + get readable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('readable'); + } + return this._readable; + } + /** + * The writable side of the transform stream. + */ + get writable() { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('writable'); + } + return this._writable; + } +} +Object.defineProperties(TransformStream.prototype, { + readable: { enumerable: true }, + writable: { enumerable: true } +}); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, { + value: 'TransformStream', + configurable: true + }); +} +function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) { + function startAlgorithm() { + return startPromise; + } + function writeAlgorithm(chunk) { + return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk); + } + function abortAlgorithm(reason) { + return TransformStreamDefaultSinkAbortAlgorithm(stream, reason); + } + function closeAlgorithm() { + return TransformStreamDefaultSinkCloseAlgorithm(stream); + } + stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm); + function pullAlgorithm() { + return TransformStreamDefaultSourcePullAlgorithm(stream); + } + function cancelAlgorithm(reason) { + return TransformStreamDefaultSourceCancelAlgorithm(stream, reason); + } + stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure. + stream._backpressure = undefined; + stream._backpressureChangePromise = undefined; + stream._backpressureChangePromise_resolve = undefined; + TransformStreamSetBackpressure(stream, true); + stream._transformStreamController = undefined; +} +function IsTransformStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) { + return false; + } + return x instanceof TransformStream; +} +// This is a no-op if both sides are already errored. +function TransformStreamError(stream, e) { + ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e); + TransformStreamErrorWritableAndUnblockWrite(stream, e); +} +function TransformStreamErrorWritableAndUnblockWrite(stream, e) { + TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController); + WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e); + TransformStreamUnblockWrite(stream); +} +function TransformStreamUnblockWrite(stream) { + if (stream._backpressure) { + // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure() + // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time + // _backpressure is set. + TransformStreamSetBackpressure(stream, false); + } +} +function TransformStreamSetBackpressure(stream, backpressure) { + // Passes also when called during construction. + if (stream._backpressureChangePromise !== undefined) { + stream._backpressureChangePromise_resolve(); + } + stream._backpressureChangePromise = newPromise(resolve => { + stream._backpressureChangePromise_resolve = resolve; + }); + stream._backpressure = backpressure; +} +// Class TransformStreamDefaultController +/** + * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}. + * + * @public + */ +class TransformStreamDefaultController { + constructor() { + throw new TypeError('Illegal constructor'); + } + /** + * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full. + */ + get desiredSize() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('desiredSize'); + } + const readableController = this._controlledTransformStream._readable._readableStreamController; + return ReadableStreamDefaultControllerGetDesiredSize(readableController); + } + enqueue(chunk = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('enqueue'); + } + TransformStreamDefaultControllerEnqueue(this, chunk); + } + /** + * Errors both the readable side and the writable side of the controlled transform stream, making all future + * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded. + */ + error(reason = undefined) { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('error'); + } + TransformStreamDefaultControllerError(this, reason); + } + /** + * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the + * transformer only needs to consume a portion of the chunks written to the writable side. + */ + terminate() { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('terminate'); + } + TransformStreamDefaultControllerTerminate(this); + } +} +Object.defineProperties(TransformStreamDefaultController.prototype, { + enqueue: { enumerable: true }, + error: { enumerable: true }, + terminate: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue'); +setFunctionName(TransformStreamDefaultController.prototype.error, 'error'); +setFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate'); +if (typeof Symbol.toStringTag === 'symbol') { + Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, { + value: 'TransformStreamDefaultController', + configurable: true + }); +} +// Transform Stream Default Controller Abstract Operations +function IsTransformStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) { + return false; + } + return x instanceof TransformStreamDefaultController; +} +function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm) { + controller._controlledTransformStream = stream; + stream._transformStreamController = controller; + controller._transformAlgorithm = transformAlgorithm; + controller._flushAlgorithm = flushAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._finishPromise = undefined; + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) { + const controller = Object.create(TransformStreamDefaultController.prototype); + let transformAlgorithm; + let flushAlgorithm; + let cancelAlgorithm; + if (transformer.transform !== undefined) { + transformAlgorithm = chunk => transformer.transform(chunk, controller); + } + else { + transformAlgorithm = chunk => { + try { + TransformStreamDefaultControllerEnqueue(controller, chunk); + return promiseResolvedWith(undefined); + } + catch (transformResultE) { + return promiseRejectedWith(transformResultE); + } + }; + } + if (transformer.flush !== undefined) { + flushAlgorithm = () => transformer.flush(controller); + } + else { + flushAlgorithm = () => promiseResolvedWith(undefined); + } + if (transformer.cancel !== undefined) { + cancelAlgorithm = reason => transformer.cancel(reason); + } + else { + cancelAlgorithm = () => promiseResolvedWith(undefined); + } + SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm); +} +function TransformStreamDefaultControllerClearAlgorithms(controller) { + controller._transformAlgorithm = undefined; + controller._flushAlgorithm = undefined; + controller._cancelAlgorithm = undefined; +} +function TransformStreamDefaultControllerEnqueue(controller, chunk) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) { + throw new TypeError('Readable side is not in a state that permits enqueue'); + } + // We throttle transform invocations based on the backpressure of the ReadableStream, but we still + // accept TransformStreamDefaultControllerEnqueue() calls. + try { + ReadableStreamDefaultControllerEnqueue(readableController, chunk); + } + catch (e) { + // This happens when readableStrategy.size() throws. + TransformStreamErrorWritableAndUnblockWrite(stream, e); + throw stream._readable._storedError; + } + const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController); + if (backpressure !== stream._backpressure) { + TransformStreamSetBackpressure(stream, true); + } +} +function TransformStreamDefaultControllerError(controller, e) { + TransformStreamError(controller._controlledTransformStream, e); +} +function TransformStreamDefaultControllerPerformTransform(controller, chunk) { + const transformPromise = controller._transformAlgorithm(chunk); + return transformPromiseWith(transformPromise, undefined, r => { + TransformStreamError(controller._controlledTransformStream, r); + throw r; + }); +} +function TransformStreamDefaultControllerTerminate(controller) { + const stream = controller._controlledTransformStream; + const readableController = stream._readable._readableStreamController; + ReadableStreamDefaultControllerClose(readableController); + const error = new TypeError('TransformStream terminated'); + TransformStreamErrorWritableAndUnblockWrite(stream, error); +} +// TransformStreamDefaultSink Algorithms +function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) { + const controller = stream._transformStreamController; + if (stream._backpressure) { + const backpressureChangePromise = stream._backpressureChangePromise; + return transformPromiseWith(backpressureChangePromise, () => { + const writable = stream._writable; + const state = writable._state; + if (state === 'erroring') { + throw writable._storedError; + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + }); + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); +} +function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally, + // we don't run the _cancelAlgorithm again. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerError(readable._readableStreamController, reason); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +function TransformStreamDefaultSinkCloseAlgorithm(stream) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + const readable = stream._readable; + // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally, + // we don't also run the _cancelAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const flushPromise = controller._flushAlgorithm(); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(flushPromise, () => { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerClose(readable._readableStreamController); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +// TransformStreamDefaultSource Algorithms +function TransformStreamDefaultSourcePullAlgorithm(stream) { + // Invariant. Enforced by the promises returned by start() and pull(). + TransformStreamSetBackpressure(stream, false); + // Prevent the next pull() call until there is backpressure. + return stream._backpressureChangePromise; +} +function TransformStreamDefaultSourceCancelAlgorithm(stream, reason) { + const controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._writable cannot change after construction, so caching it across a call to user code is safe. + const writable = stream._writable; + // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or + // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the + // _flushAlgorithm. + controller._finishPromise = newPromise((resolve, reject) => { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + const cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, () => { + if (writable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, writable._storedError); + } + else { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, r => { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +// Helper functions for the TransformStreamDefaultController. +function defaultControllerBrandCheckException(name) { + return new TypeError(`TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`); +} +function defaultControllerFinishPromiseResolve(controller) { + if (controller._finishPromise_resolve === undefined) { + return; + } + controller._finishPromise_resolve(); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +function defaultControllerFinishPromiseReject(controller, reason) { + if (controller._finishPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(controller._finishPromise); + controller._finishPromise_reject(reason); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +// Helper functions for the TransformStream. +function streamBrandCheckException(name) { + return new TypeError(`TransformStream.prototype.${name} can only be used on a TransformStream`); +} + +export { ByteLengthQueuingStrategy, CountQueuingStrategy, ReadableByteStreamController, ReadableStream, ReadableStreamBYOBReader, ReadableStreamBYOBRequest, ReadableStreamDefaultController, ReadableStreamDefaultReader, TransformStream, TransformStreamDefaultController, WritableStream, WritableStreamDefaultController, WritableStreamDefaultWriter }; +//# sourceMappingURL=ponyfill.es6.mjs.map diff --git a/node_modules/web-streams-polyfill/dist/ponyfill.es6.mjs.map b/node_modules/web-streams-polyfill/dist/ponyfill.es6.mjs.map new file mode 100644 index 00000000..929200b5 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/ponyfill.es6.mjs.map @@ -0,0 +1 @@ +{"version":3,"file":"ponyfill.es6.mjs","sources":["../src/utils.ts","../src/lib/helpers/miscellaneous.ts","../src/lib/helpers/webidl.ts","../src/lib/simple-queue.ts","../src/lib/abstract-ops/internal-methods.ts","../src/lib/readable-stream/generic-reader.ts","../src/stub/number-isfinite.ts","../src/stub/math-trunc.ts","../src/lib/validators/basic.ts","../src/lib/validators/readable-stream.ts","../src/lib/readable-stream/default-reader.ts","../node_modules/tslib/tslib.es6.js","../src/lib/abstract-ops/ecmascript.ts","../src/target/es5/stub/async-iterator-prototype.ts","../src/lib/readable-stream/async-iterator.ts","../src/stub/number-isnan.ts","../src/lib/abstract-ops/miscellaneous.ts","../src/lib/abstract-ops/queue-with-sizes.ts","../src/lib/helpers/array-buffer-view.ts","../src/lib/readable-stream/byte-stream-controller.ts","../src/lib/validators/reader-options.ts","../src/lib/readable-stream/byob-reader.ts","../src/lib/abstract-ops/queuing-strategy.ts","../src/lib/validators/queuing-strategy.ts","../src/lib/validators/underlying-sink.ts","../src/lib/validators/writable-stream.ts","../src/lib/abort-signal.ts","../src/lib/writable-stream.ts","../src/globals.ts","../src/stub/dom-exception.ts","../src/lib/readable-stream/pipe.ts","../src/lib/readable-stream/default-controller.ts","../src/lib/readable-stream/tee.ts","../src/lib/readable-stream/readable-stream-like.ts","../src/lib/readable-stream/from.ts","../src/lib/validators/underlying-source.ts","../src/lib/validators/iterator-options.ts","../src/lib/validators/pipe-options.ts","../src/lib/validators/readable-writable-pair.ts","../src/lib/readable-stream.ts","../src/lib/validators/queuing-strategy-init.ts","../src/lib/byte-length-queuing-strategy.ts","../src/lib/count-queuing-strategy.ts","../src/lib/validators/transformer.ts","../src/lib/transform-stream.ts"],"sourcesContent":["export function noop(): undefined {\n return undefined;\n}\n","import { noop } from '../../utils';\nimport { AssertionError } from '../../stub/assert';\n\nexport function typeIsObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport const rethrowAssertionErrorRejection: (e: any) => void =\n DEBUG ? e => {\n // Used throughout the reference implementation, as `.catch(rethrowAssertionErrorRejection)`, to ensure any errors\n // get shown. There are places in the spec where we do promise transformations and purposefully ignore or don't\n // expect any errors, but assertion errors are always problematic.\n if (e && e instanceof AssertionError) {\n setTimeout(() => {\n throw e;\n }, 0);\n }\n } : noop;\n\nexport function setFunctionName(fn: Function, name: string): void {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n } catch {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n}\n","import { rethrowAssertionErrorRejection } from './miscellaneous';\nimport assert from '../../stub/assert';\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\n\n// https://webidl.spec.whatwg.org/#a-new-promise\nexport function newPromise(executor: (\n resolve: (value: T | PromiseLike) => void,\n reject: (reason?: any) => void\n) => void): Promise {\n return new originalPromise(executor);\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-resolved-with\nexport function promiseResolvedWith(value: T | PromiseLike): Promise {\n return newPromise(resolve => resolve(value));\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-rejected-with\nexport function promiseRejectedWith(reason: any): Promise {\n return originalPromiseReject(reason);\n}\n\nexport function PerformPromiseThen(\n promise: Promise,\n onFulfilled?: (value: T) => TResult1 | PromiseLike,\n onRejected?: (reason: any) => TResult2 | PromiseLike): Promise {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected) as Promise;\n}\n\n// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n// from that handler. To prevent this, return null instead of void from all handlers.\n// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\nexport function uponPromise(\n promise: Promise,\n onFulfilled?: (value: T) => null | PromiseLike,\n onRejected?: (reason: any) => null | PromiseLike): void {\n PerformPromiseThen(\n PerformPromiseThen(promise, onFulfilled, onRejected),\n undefined,\n rethrowAssertionErrorRejection\n );\n}\n\nexport function uponFulfillment(promise: Promise, onFulfilled: (value: T) => null | PromiseLike): void {\n uponPromise(promise, onFulfilled);\n}\n\nexport function uponRejection(promise: Promise, onRejected: (reason: any) => null | PromiseLike): void {\n uponPromise(promise, undefined, onRejected);\n}\n\nexport function transformPromiseWith(\n promise: Promise,\n fulfillmentHandler?: (value: T) => TResult1 | PromiseLike,\n rejectionHandler?: (reason: any) => TResult2 | PromiseLike): Promise {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\n\nexport function setPromiseIsHandledToTrue(promise: Promise): void {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\nlet _queueMicrotask: (callback: () => void) => void = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n } else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n};\n\nexport { _queueMicrotask as queueMicrotask };\n\nexport function reflectCall(F: (this: T, ...fnArgs: A) => R, V: T, args: A): R {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n}\n\nexport function promiseCall(F: (this: T, ...fnArgs: A) => R | PromiseLike,\n V: T,\n args: A): Promise {\n assert(typeof F === 'function');\n assert(V !== undefined);\n assert(Array.isArray(args));\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n } catch (value) {\n return promiseRejectedWith(value);\n }\n}\n","import assert from '../stub/assert';\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n\ninterface Node {\n _elements: T[];\n _next: Node | undefined;\n}\n\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nexport class SimpleQueue {\n private _front: Node;\n private _back: Node;\n private _cursor = 0;\n private _size = 0;\n\n constructor() {\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n\n get length(): number {\n return this._size;\n }\n\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element: T): void {\n const oldBack = this._back;\n let newBack = oldBack;\n assert(oldBack._next === undefined);\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n assert(elements.length === QUEUE_MAX_ARRAY_SIZE);\n assert(oldFront._next !== undefined);\n newFront = oldFront._next!;\n newCursor = 0;\n }\n\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined!;\n\n return element;\n }\n\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback: (element: T) => void): void {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n assert(node._next !== undefined);\n assert(i === QUEUE_MAX_ARRAY_SIZE);\n node = node._next!;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n}\n","export const AbortSteps = Symbol('[[AbortSteps]]');\nexport const ErrorSteps = Symbol('[[ErrorSteps]]');\nexport const CancelSteps = Symbol('[[CancelSteps]]');\nexport const PullSteps = Symbol('[[PullSteps]]');\nexport const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n","import assert from '../../stub/assert';\nimport { ReadableStream, ReadableStreamCancel, type ReadableStreamReader } from '../readable-stream';\nimport { newPromise, setPromiseIsHandledToTrue } from '../helpers/webidl';\nimport { ReleaseSteps } from '../abstract-ops/internal-methods';\n\nexport function ReadableStreamReaderGenericInitialize(reader: ReadableStreamReader, stream: ReadableStream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n } else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n } else {\n assert(stream._state === 'errored');\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n}\n\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\n\nexport function ReadableStreamReaderGenericCancel(reader: ReadableStreamReader, reason: any): Promise {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n return ReadableStreamCancel(stream, reason);\n}\n\nexport function ReadableStreamReaderGenericRelease(reader: ReadableStreamReader) {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n assert(stream._reader === reader);\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n } else {\n defaultReaderClosedPromiseResetToRejected(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n\n stream._readableStreamController[ReleaseSteps]();\n\n stream._reader = undefined;\n reader._ownerReadableStream = undefined!;\n}\n\n// Helper functions for the readers.\n\nexport function readerLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nexport function defaultReaderClosedPromiseInitialize(reader: ReadableStreamReader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n}\n\nexport function defaultReaderClosedPromiseInitializeAsRejected(reader: ReadableStreamReader, reason: any) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseInitializeAsResolved(reader: ReadableStreamReader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n}\n\nexport function defaultReaderClosedPromiseReject(reader: ReadableStreamReader, reason: any) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n\nexport function defaultReaderClosedPromiseResetToRejected(reader: ReadableStreamReader, reason: any) {\n assert(reader._closedPromise_resolve === undefined);\n assert(reader._closedPromise_reject === undefined);\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseResolve(reader: ReadableStreamReader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite: typeof Number.isFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n};\n\nexport default NumberIsFinite;\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc: typeof Math.trunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\nexport default MathTrunc;\n","import NumberIsFinite from '../../stub/number-isfinite';\nimport MathTrunc from '../../stub/math-trunc';\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nexport function isDictionary(x: any): x is object | null {\n return typeof x === 'object' || typeof x === 'function';\n}\n\nexport function assertDictionary(obj: unknown,\n context: string): asserts obj is object | null | undefined {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport type AnyFunction = (...args: any[]) => any;\n\n// https://heycam.github.io/webidl/#idl-callback-functions\nexport function assertFunction(x: unknown, context: string): asserts x is AnyFunction {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-object\nexport function isObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport function assertObject(x: unknown,\n context: string): asserts x is object {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport function assertRequiredArgument(x: T | undefined,\n position: number,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n}\n\nexport function assertRequiredField(x: T | undefined,\n field: string,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nexport function convertUnrestrictedDouble(value: unknown): number {\n return Number(value);\n}\n\nfunction censorNegativeZero(x: number): number {\n return x === 0 ? 0 : x;\n}\n\nfunction integerPart(x: number): number {\n return censorNegativeZero(MathTrunc(x));\n}\n\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nexport function convertUnsignedLongLongWithEnforceRange(value: unknown, context: string): number {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n\n let x = Number(value);\n x = censorNegativeZero(x);\n\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n\n x = integerPart(x);\n\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n\n return x;\n}\n","import { IsReadableStream, ReadableStream } from '../readable-stream';\n\nexport function assertReadableStream(x: unknown, context: string): asserts x is ReadableStream {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, ReadableStream } from '../readable-stream';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { PullSteps } from '../abstract-ops/internal-methods';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\n\n/**\n * A result returned by {@link ReadableStreamDefaultReader.read}.\n *\n * @public\n */\nexport type ReadableStreamDefaultReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value?: undefined;\n}\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamDefaultReader(stream: ReadableStream): ReadableStreamDefaultReader {\n return new ReadableStreamDefaultReader(stream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadRequest(stream: ReadableStream,\n readRequest: ReadRequest): void {\n assert(IsReadableStreamDefaultReader(stream._reader));\n assert(stream._state === 'readable');\n\n (stream._reader! as ReadableStreamDefaultReader)._readRequests.push(readRequest);\n}\n\nexport function ReadableStreamFulfillReadRequest(stream: ReadableStream, chunk: R | undefined, done: boolean) {\n const reader = stream._reader as ReadableStreamDefaultReader;\n\n assert(reader._readRequests.length > 0);\n\n const readRequest = reader._readRequests.shift()!;\n if (done) {\n readRequest._closeSteps();\n } else {\n readRequest._chunkSteps(chunk!);\n }\n}\n\nexport function ReadableStreamGetNumReadRequests(stream: ReadableStream): number {\n return (stream._reader as ReadableStreamDefaultReader)._readRequests.length;\n}\n\nexport function ReadableStreamHasDefaultReader(stream: ReadableStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadRequest {\n _chunkSteps(chunk: R): void;\n\n _closeSteps(): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamDefaultReader {\n /** @internal */\n _ownerReadableStream!: ReadableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(): Promise> {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamDefaultReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamDefaultReader(x: any): x is ReadableStreamDefaultReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultReader;\n}\n\nexport function ReadableStreamDefaultReaderRead(reader: ReadableStreamDefaultReader,\n readRequest: ReadRequest): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n } else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n } else {\n assert(stream._state === 'readable');\n stream._readableStreamController[PullSteps](readRequest as ReadRequest);\n }\n}\n\nexport function ReadableStreamDefaultReaderRelease(reader: ReadableStreamDefaultReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n}\n\nexport function ReadableStreamDefaultReaderErrorReadRequests(reader: ReadableStreamDefaultReader, e: any) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nfunction defaultReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n","/******************************************************************************\r\nCopyright (c) Microsoft Corporation.\r\n\r\nPermission to use, copy, modify, and/or distribute this software for any\r\npurpose with or without fee is hereby granted.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\r\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY\r\nAND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\r\n***************************************************************************** */\r\n/* global Reflect, Promise, SuppressedError, Symbol */\r\n\r\nvar extendStatics = function(d, b) {\r\n extendStatics = Object.setPrototypeOf ||\r\n ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\r\n return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n if (typeof b !== \"function\" && b !== null)\r\n throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\r\n extendStatics(d, b);\r\n function __() { this.constructor = d; }\r\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\nexport var __assign = function() {\r\n __assign = Object.assign || function __assign(t) {\r\n for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n s = arguments[i];\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n }\r\n return t;\r\n }\r\n return __assign.apply(this, arguments);\r\n}\r\n\r\nexport function __rest(s, e) {\r\n var t = {};\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\r\n t[p] = s[p];\r\n if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\r\n for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {\r\n if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))\r\n t[p[i]] = s[p[i]];\r\n }\r\n return t;\r\n}\r\n\r\nexport function __decorate(decorators, target, key, desc) {\r\n var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\r\n if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\r\n else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\r\n return c > 3 && r && Object.defineProperty(target, key, r), r;\r\n}\r\n\r\nexport function __param(paramIndex, decorator) {\r\n return function (target, key) { decorator(target, key, paramIndex); }\r\n}\r\n\r\nexport function __esDecorate(ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {\r\n function accept(f) { if (f !== void 0 && typeof f !== \"function\") throw new TypeError(\"Function expected\"); return f; }\r\n var kind = contextIn.kind, key = kind === \"getter\" ? \"get\" : kind === \"setter\" ? \"set\" : \"value\";\r\n var target = !descriptorIn && ctor ? contextIn[\"static\"] ? ctor : ctor.prototype : null;\r\n var descriptor = descriptorIn || (target ? Object.getOwnPropertyDescriptor(target, contextIn.name) : {});\r\n var _, done = false;\r\n for (var i = decorators.length - 1; i >= 0; i--) {\r\n var context = {};\r\n for (var p in contextIn) context[p] = p === \"access\" ? {} : contextIn[p];\r\n for (var p in contextIn.access) context.access[p] = contextIn.access[p];\r\n context.addInitializer = function (f) { if (done) throw new TypeError(\"Cannot add initializers after decoration has completed\"); extraInitializers.push(accept(f || null)); };\r\n var result = (0, decorators[i])(kind === \"accessor\" ? { get: descriptor.get, set: descriptor.set } : descriptor[key], context);\r\n if (kind === \"accessor\") {\r\n if (result === void 0) continue;\r\n if (result === null || typeof result !== \"object\") throw new TypeError(\"Object expected\");\r\n if (_ = accept(result.get)) descriptor.get = _;\r\n if (_ = accept(result.set)) descriptor.set = _;\r\n if (_ = accept(result.init)) initializers.unshift(_);\r\n }\r\n else if (_ = accept(result)) {\r\n if (kind === \"field\") initializers.unshift(_);\r\n else descriptor[key] = _;\r\n }\r\n }\r\n if (target) Object.defineProperty(target, contextIn.name, descriptor);\r\n done = true;\r\n};\r\n\r\nexport function __runInitializers(thisArg, initializers, value) {\r\n var useValue = arguments.length > 2;\r\n for (var i = 0; i < initializers.length; i++) {\r\n value = useValue ? initializers[i].call(thisArg, value) : initializers[i].call(thisArg);\r\n }\r\n return useValue ? value : void 0;\r\n};\r\n\r\nexport function __propKey(x) {\r\n return typeof x === \"symbol\" ? x : \"\".concat(x);\r\n};\r\n\r\nexport function __setFunctionName(f, name, prefix) {\r\n if (typeof name === \"symbol\") name = name.description ? \"[\".concat(name.description, \"]\") : \"\";\r\n return Object.defineProperty(f, \"name\", { configurable: true, value: prefix ? \"\".concat(prefix, \" \", name) : name });\r\n};\r\n\r\nexport function __metadata(metadataKey, metadataValue) {\r\n if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(metadataKey, metadataValue);\r\n}\r\n\r\nexport function __awaiter(thisArg, _arguments, P, generator) {\r\n function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }\r\n return new (P || (P = Promise))(function (resolve, reject) {\r\n function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\r\n function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\r\n function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }\r\n step((generator = generator.apply(thisArg, _arguments || [])).next());\r\n });\r\n}\r\n\r\nexport function __generator(thisArg, body) {\r\n var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n function verb(n) { return function (v) { return step([n, v]); }; }\r\n function step(op) {\r\n if (f) throw new TypeError(\"Generator is already executing.\");\r\n while (g && (g = 0, op[0] && (_ = 0)), _) try {\r\n if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\r\n if (y = 0, t) op = [op[0] & 2, t.value];\r\n switch (op[0]) {\r\n case 0: case 1: t = op; break;\r\n case 4: _.label++; return { value: op[1], done: false };\r\n case 5: _.label++; y = op[1]; op = [0]; continue;\r\n case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n default:\r\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n if (t[2]) _.ops.pop();\r\n _.trys.pop(); continue;\r\n }\r\n op = body.call(thisArg, _);\r\n } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n }\r\n}\r\n\r\nexport var __createBinding = Object.create ? (function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n var desc = Object.getOwnPropertyDescriptor(m, k);\r\n if (!desc || (\"get\" in desc ? !m.__esModule : desc.writable || desc.configurable)) {\r\n desc = { enumerable: true, get: function() { return m[k]; } };\r\n }\r\n Object.defineProperty(o, k2, desc);\r\n}) : (function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n o[k2] = m[k];\r\n});\r\n\r\nexport function __exportStar(m, o) {\r\n for (var p in m) if (p !== \"default\" && !Object.prototype.hasOwnProperty.call(o, p)) __createBinding(o, m, p);\r\n}\r\n\r\nexport function __values(o) {\r\n var s = typeof Symbol === \"function\" && Symbol.iterator, m = s && o[s], i = 0;\r\n if (m) return m.call(o);\r\n if (o && typeof o.length === \"number\") return {\r\n next: function () {\r\n if (o && i >= o.length) o = void 0;\r\n return { value: o && o[i++], done: !o };\r\n }\r\n };\r\n throw new TypeError(s ? \"Object is not iterable.\" : \"Symbol.iterator is not defined.\");\r\n}\r\n\r\nexport function __read(o, n) {\r\n var m = typeof Symbol === \"function\" && o[Symbol.iterator];\r\n if (!m) return o;\r\n var i = m.call(o), r, ar = [], e;\r\n try {\r\n while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\r\n }\r\n catch (error) { e = { error: error }; }\r\n finally {\r\n try {\r\n if (r && !r.done && (m = i[\"return\"])) m.call(i);\r\n }\r\n finally { if (e) throw e.error; }\r\n }\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spread() {\r\n for (var ar = [], i = 0; i < arguments.length; i++)\r\n ar = ar.concat(__read(arguments[i]));\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spreadArrays() {\r\n for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;\r\n for (var r = Array(s), k = 0, i = 0; i < il; i++)\r\n for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)\r\n r[k] = a[j];\r\n return r;\r\n}\r\n\r\nexport function __spreadArray(to, from, pack) {\r\n if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {\r\n if (ar || !(i in from)) {\r\n if (!ar) ar = Array.prototype.slice.call(from, 0, i);\r\n ar[i] = from[i];\r\n }\r\n }\r\n return to.concat(ar || Array.prototype.slice.call(from));\r\n}\r\n\r\nexport function __await(v) {\r\n return this instanceof __await ? (this.v = v, this) : new __await(v);\r\n}\r\n\r\nexport function __asyncGenerator(thisArg, _arguments, generator) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var g = generator.apply(thisArg, _arguments || []), i, q = [];\r\n return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\r\n function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\r\n function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\r\n function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n function fulfill(value) { resume(\"next\", value); }\r\n function reject(value) { resume(\"throw\", value); }\r\n function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n var i, p;\r\n return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var m = o[Symbol.asyncIterator], i;\r\n return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n return cooked;\r\n};\r\n\r\nvar __setModuleDefault = Object.create ? (function(o, v) {\r\n Object.defineProperty(o, \"default\", { enumerable: true, value: v });\r\n}) : function(o, v) {\r\n o[\"default\"] = v;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n if (mod && mod.__esModule) return mod;\r\n var result = {};\r\n if (mod != null) for (var k in mod) if (k !== \"default\" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);\r\n __setModuleDefault(result, mod);\r\n return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n\r\nexport function __classPrivateFieldGet(receiver, state, kind, f) {\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a getter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot read private member from an object whose class did not declare it\");\r\n return kind === \"m\" ? f : kind === \"a\" ? f.call(receiver) : f ? f.value : state.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, state, value, kind, f) {\r\n if (kind === \"m\") throw new TypeError(\"Private method is not writable\");\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a setter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot write private member to an object whose class did not declare it\");\r\n return (kind === \"a\" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;\r\n}\r\n\r\nexport function __classPrivateFieldIn(state, receiver) {\r\n if (receiver === null || (typeof receiver !== \"object\" && typeof receiver !== \"function\")) throw new TypeError(\"Cannot use 'in' operator on non-object\");\r\n return typeof state === \"function\" ? receiver === state : state.has(receiver);\r\n}\r\n\r\nexport function __addDisposableResource(env, value, async) {\r\n if (value !== null && value !== void 0) {\r\n if (typeof value !== \"object\" && typeof value !== \"function\") throw new TypeError(\"Object expected.\");\r\n var dispose;\r\n if (async) {\r\n if (!Symbol.asyncDispose) throw new TypeError(\"Symbol.asyncDispose is not defined.\");\r\n dispose = value[Symbol.asyncDispose];\r\n }\r\n if (dispose === void 0) {\r\n if (!Symbol.dispose) throw new TypeError(\"Symbol.dispose is not defined.\");\r\n dispose = value[Symbol.dispose];\r\n }\r\n if (typeof dispose !== \"function\") throw new TypeError(\"Object not disposable.\");\r\n env.stack.push({ value: value, dispose: dispose, async: async });\r\n }\r\n else if (async) {\r\n env.stack.push({ async: true });\r\n }\r\n return value;\r\n}\r\n\r\nvar _SuppressedError = typeof SuppressedError === \"function\" ? SuppressedError : function (error, suppressed, message) {\r\n var e = new Error(message);\r\n return e.name = \"SuppressedError\", e.error = error, e.suppressed = suppressed, e;\r\n};\r\n\r\nexport function __disposeResources(env) {\r\n function fail(e) {\r\n env.error = env.hasError ? new _SuppressedError(e, env.error, \"An error was suppressed during disposal.\") : e;\r\n env.hasError = true;\r\n }\r\n function next() {\r\n while (env.stack.length) {\r\n var rec = env.stack.pop();\r\n try {\r\n var result = rec.dispose && rec.dispose.call(rec.value);\r\n if (rec.async) return Promise.resolve(result).then(next, function(e) { fail(e); return next(); });\r\n }\r\n catch (e) {\r\n fail(e);\r\n }\r\n }\r\n if (env.hasError) throw env.error;\r\n }\r\n return next();\r\n}\r\n\r\nexport default {\r\n __extends: __extends,\r\n __assign: __assign,\r\n __rest: __rest,\r\n __decorate: __decorate,\r\n __param: __param,\r\n __metadata: __metadata,\r\n __awaiter: __awaiter,\r\n __generator: __generator,\r\n __createBinding: __createBinding,\r\n __exportStar: __exportStar,\r\n __values: __values,\r\n __read: __read,\r\n __spread: __spread,\r\n __spreadArrays: __spreadArrays,\r\n __spreadArray: __spreadArray,\r\n __await: __await,\r\n __asyncGenerator: __asyncGenerator,\r\n __asyncDelegator: __asyncDelegator,\r\n __asyncValues: __asyncValues,\r\n __makeTemplateObject: __makeTemplateObject,\r\n __importStar: __importStar,\r\n __importDefault: __importDefault,\r\n __classPrivateFieldGet: __classPrivateFieldGet,\r\n __classPrivateFieldSet: __classPrivateFieldSet,\r\n __classPrivateFieldIn: __classPrivateFieldIn,\r\n __addDisposableResource: __addDisposableResource,\r\n __disposeResources: __disposeResources,\r\n};\r\n","import { reflectCall } from 'lib/helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport assert from '../../stub/assert';\n\ndeclare global {\n interface ArrayBuffer {\n readonly detached: boolean;\n\n transfer(): ArrayBuffer;\n }\n\n function structuredClone(value: T, options: { transfer: ArrayBuffer[] }): T;\n}\n\nexport function CreateArrayFromList(elements: T): T {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice() as T;\n}\n\nexport function CopyDataBlockBytes(dest: ArrayBuffer,\n destOffset: number,\n src: ArrayBuffer,\n srcOffset: number,\n n: number) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n\nexport let TransferArrayBuffer = (O: ArrayBuffer): ArrayBuffer => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n } else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n } else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n};\n\nexport function CanTransferArrayBuffer(O: ArrayBuffer): boolean {\n return !IsDetachedBuffer(O);\n}\n\nexport let IsDetachedBuffer = (O: ArrayBuffer): boolean => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n } else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n};\n\nexport function ArrayBufferSlice(buffer: ArrayBuffer, begin: number, end: number): ArrayBuffer {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n}\n\nexport type MethodName = {\n [P in keyof T]: T[P] extends Function | undefined ? P : never;\n}[keyof T];\n\nexport function GetMethod>(receiver: T, prop: K): T[K] | undefined {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n}\n\nexport interface SyncIteratorRecord {\n iterator: Iterator,\n nextMethod: Iterator['next'],\n done: boolean;\n}\n\nexport interface AsyncIteratorRecord {\n iterator: AsyncIterator,\n nextMethod: AsyncIterator['next'],\n done: boolean;\n}\n\nexport type SyncOrAsyncIteratorRecord = SyncIteratorRecord | AsyncIteratorRecord;\n\nexport function CreateAsyncFromSyncIterator(syncIteratorRecord: SyncIteratorRecord): AsyncIteratorRecord {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n}\n\n// Aligns with core-js/modules/es.symbol.async-iterator.js\nexport const SymbolAsyncIterator: (typeof Symbol)['asyncIterator'] =\n Symbol.asyncIterator ??\n Symbol.for?.('Symbol.asyncIterator') ??\n '@@asyncIterator';\n\nexport type SyncOrAsyncIterable = Iterable | AsyncIterable;\nexport type SyncOrAsyncIteratorMethod = () => (Iterator | AsyncIterator);\n\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint: 'async',\n method?: SyncOrAsyncIteratorMethod\n): AsyncIteratorRecord;\nfunction GetIterator(\n obj: Iterable,\n hint: 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncIteratorRecord;\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint = 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncOrAsyncIteratorRecord {\n assert(hint === 'sync' || hint === 'async');\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj as AsyncIterable, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj as Iterable, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj as Iterable, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n } else {\n method = GetMethod(obj as Iterable, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false } as SyncOrAsyncIteratorRecord;\n}\n\nexport { GetIterator };\n\nexport function IteratorNext(iteratorRecord: AsyncIteratorRecord): Promise> {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n}\n\nexport function IteratorComplete(\n iterResult: IteratorResult\n): iterResult is IteratorReturnResult {\n assert(typeIsObject(iterResult));\n return Boolean(iterResult.done);\n}\n\nexport function IteratorValue(iterResult: IteratorYieldResult): T {\n assert(typeIsObject(iterResult));\n return iterResult.value;\n}\n","/// \n\nimport { SymbolAsyncIterator } from '../../../lib/abstract-ops/ecmascript';\n\n// We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it.\nexport const AsyncIteratorPrototype: AsyncIterable = {\n // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( )\n // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator\n [SymbolAsyncIterator](this: AsyncIterator) {\n return this;\n }\n};\nObject.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false });\n","/// \n\nimport { ReadableStream } from '../readable-stream';\nimport {\n AcquireReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadableStreamDefaultReadResult,\n type ReadRequest\n} from './default-reader';\nimport { ReadableStreamReaderGenericCancel, ReadableStreamReaderGenericRelease } from './generic-reader';\nimport assert from '../../stub/assert';\nimport { AsyncIteratorPrototype } from '@@target/stub/async-iterator-prototype';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n queueMicrotask,\n transformPromiseWith\n} from '../helpers/webidl';\n\n/**\n * An async iterator returned by {@link ReadableStream.values}.\n *\n * @public\n */\nexport interface ReadableStreamAsyncIterator extends AsyncIterableIterator {\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nexport class ReadableStreamAsyncIteratorImpl {\n private readonly _reader: ReadableStreamDefaultReader;\n private readonly _preventCancel: boolean;\n private _ongoingPromise: Promise> | undefined = undefined;\n private _isFinished = false;\n\n constructor(reader: ReadableStreamDefaultReader, preventCancel: boolean) {\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n\n next(): Promise> {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n\n return(value: any): Promise> {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n\n private _nextSteps(): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n\n private _returnSteps(value: any): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n assert(reader._readRequests.length === 0);\n\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n}\n\ninterface ReadableStreamAsyncIteratorInstance extends ReadableStreamAsyncIterator {\n /** @interal */\n _asyncIteratorImpl: ReadableStreamAsyncIteratorImpl;\n\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nconst ReadableStreamAsyncIteratorPrototype: ReadableStreamAsyncIteratorInstance = {\n next(this: ReadableStreamAsyncIteratorInstance): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n\n return(this: ReadableStreamAsyncIteratorInstance, value: any): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n} as any;\nObject.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamAsyncIterator(stream: ReadableStream,\n preventCancel: boolean): ReadableStreamAsyncIterator {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator: ReadableStreamAsyncIteratorInstance = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n}\n\nfunction IsReadableStreamAsyncIterator(x: any): x is ReadableStreamAsyncIterator {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n\n try {\n // noinspection SuspiciousTypeOfGuard\n return (x as ReadableStreamAsyncIteratorInstance)._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n } catch {\n return false;\n }\n}\n\n// Helper functions for the ReadableStream.\n\nfunction streamAsyncIteratorBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN: typeof Number.isNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n};\n\nexport default NumberIsNaN;\n","import NumberIsNaN from '../../stub/number-isnan';\nimport { ArrayBufferSlice } from './ecmascript';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function IsNonNegativeNumber(v: number): boolean {\n if (typeof v !== 'number') {\n return false;\n }\n\n if (NumberIsNaN(v)) {\n return false;\n }\n\n if (v < 0) {\n return false;\n }\n\n return true;\n}\n\nexport function CloneAsUint8Array(O: NonShared): NonShared {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer) as NonShared;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsNonNegativeNumber } from './miscellaneous';\n\nexport interface QueueContainer {\n _queue: SimpleQueue;\n _queueTotalSize: number;\n}\n\nexport interface QueuePair {\n value: T;\n size: number;\n}\n\nexport function DequeueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.shift()!;\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n\n return pair.value;\n}\n\nexport function EnqueueValueWithSize(container: QueueContainer>, value: T, size: number) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n}\n\nexport function PeekQueueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.peek();\n return pair.value;\n}\n\nexport function ResetQueue(container: QueueContainer) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n}\n","export type TypedArray =\n | Int8Array\n | Uint8Array\n | Uint8ClampedArray\n | Int16Array\n | Uint16Array\n | Int32Array\n | Uint32Array\n | Float32Array\n | Float64Array;\n\nexport type NonShared = T & {\n buffer: ArrayBuffer;\n}\n\nexport interface ArrayBufferViewConstructor {\n new(buffer: ArrayBuffer, byteOffset: number, length?: number): T;\n\n readonly prototype: T;\n}\n\nexport interface TypedArrayConstructor extends ArrayBufferViewConstructor {\n readonly BYTES_PER_ELEMENT: number;\n}\n\nexport type DataViewConstructor = ArrayBufferViewConstructor;\n\nfunction isDataViewConstructor(ctor: Function): ctor is DataViewConstructor {\n return ctor === DataView;\n}\n\nexport function isDataView(view: ArrayBufferView): view is DataView {\n return isDataViewConstructor(view.constructor);\n}\n\nexport function arrayBufferViewElementSize(ctor: ArrayBufferViewConstructor): number {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return (ctor as unknown as TypedArrayConstructor).BYTES_PER_ELEMENT;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n IsReadableStreamDefaultReader,\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n ReadableStreamHasDefaultReader,\n type ReadRequest\n} from './default-reader';\nimport {\n ReadableStreamAddReadIntoRequest,\n ReadableStreamFulfillReadIntoRequest,\n ReadableStreamGetNumReadIntoRequests,\n ReadableStreamHasBYOBReader,\n type ReadIntoRequest\n} from './byob-reader';\nimport NumberIsInteger from '../../stub/number-isinteger';\nimport {\n IsReadableStreamLocked,\n type ReadableByteStream,\n ReadableStreamClose,\n ReadableStreamError\n} from '../readable-stream';\nimport type { ValidatedUnderlyingByteSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport {\n ArrayBufferSlice,\n CanTransferArrayBuffer,\n CopyDataBlockBytes,\n IsDetachedBuffer,\n TransferArrayBuffer\n} from '../abstract-ops/ecmascript';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\nimport { assertRequiredArgument, convertUnsignedLongLongWithEnforceRange } from '../validators/basic';\nimport {\n type ArrayBufferViewConstructor,\n arrayBufferViewElementSize,\n type NonShared,\n type TypedArrayConstructor\n} from '../helpers/array-buffer-view';\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nexport class ReadableStreamBYOBRequest {\n /** @internal */\n _associatedReadableByteStreamController!: ReadableByteStreamController;\n /** @internal */\n _view!: NonShared | null;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view(): ArrayBufferView | null {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n\n return this._view;\n }\n\n /**\n * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into\n * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer.\n *\n * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer\n * modifiable.\n */\n respond(bytesWritten: number): void;\n respond(bytesWritten: number | undefined): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(this._view!.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n\n assert(this._view!.byteLength > 0);\n assert(this._view!.buffer.byteLength > 0);\n\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n\n /**\n * Indicates to the associated readable byte stream that instead of writing into\n * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`,\n * which will be given to the consumer of the readable byte stream.\n *\n * After this method is called, `view` will be transferred and no longer modifiable.\n */\n respondWithNewView(view: ArrayBufferView): void;\n respondWithNewView(view: NonShared): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n}\n\ninterface ByteQueueElement {\n buffer: ArrayBuffer;\n byteOffset: number;\n byteLength: number;\n}\n\ntype PullIntoDescriptor = NonShared> =\n DefaultPullIntoDescriptor\n | BYOBPullIntoDescriptor;\n\ninterface DefaultPullIntoDescriptor {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: TypedArrayConstructor;\n readerType: 'default' | 'none';\n}\n\ninterface BYOBPullIntoDescriptor = NonShared> {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: ArrayBufferViewConstructor;\n readerType: 'byob' | 'none';\n}\n\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableByteStreamController {\n /** @internal */\n _controlledReadableByteStream!: ReadableByteStream;\n /** @internal */\n _queue!: SimpleQueue;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n /** @internal */\n _autoAllocateChunkSize: number | undefined;\n /** @internal */\n _byobRequest: ReadableStreamBYOBRequest | null;\n /** @internal */\n _pendingPullIntos!: SimpleQueue;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest(): ReadableStreamBYOBRequest | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n\n ReadableByteStreamControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk chunk in the controlled readable stream.\n * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown.\n */\n enqueue(chunk: ArrayBufferView): void;\n enqueue(chunk: NonShared): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n\n ReadableByteStreamControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n\n ResetQueue(this);\n\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest>): void {\n const stream = this._controlledReadableByteStream;\n assert(ReadableStreamHasDefaultReader(stream));\n\n if (this._queueTotalSize > 0) {\n assert(ReadableStreamGetNumReadRequests(stream) === 0);\n\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer: ArrayBuffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n } catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n\n const pullIntoDescriptor: DefaultPullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n}\n\nObject.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableByteStreamController.prototype.close, 'close');\nsetFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableByteStreamController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableByteStreamController.\n\nexport function IsReadableByteStreamController(x: any): x is ReadableByteStreamController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n\n return x instanceof ReadableByteStreamController;\n}\n\nfunction IsReadableStreamBYOBRequest(x: any): x is ReadableStreamBYOBRequest {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBRequest;\n}\n\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller: ReadableByteStreamController): void {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller: ReadableByteStreamController) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n}\n\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor>(\n stream: ReadableByteStream,\n pullIntoDescriptor: PullIntoDescriptor\n) {\n assert(stream._state !== 'errored');\n assert(pullIntoDescriptor.readerType !== 'none');\n\n let done = false;\n if (stream._state === 'closed') {\n assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);\n done = true;\n }\n\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView as unknown as NonShared, done);\n } else {\n assert(pullIntoDescriptor.readerType === 'byob');\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n}\n\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor>(\n pullIntoDescriptor: PullIntoDescriptor\n): T {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n\n assert(bytesFilled <= pullIntoDescriptor.byteLength);\n assert(bytesFilled % elementSize === 0);\n\n return new pullIntoDescriptor.viewConstructor(\n pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize) as T;\n}\n\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n}\n\nfunction ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n } catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n}\n\nfunction ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.readerType === 'none');\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n firstDescriptor.buffer,\n firstDescriptor.byteOffset,\n firstDescriptor.bytesFilled\n );\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n}\n\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller: ReadableByteStreamController,\n pullIntoDescriptor: PullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize,\n pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n\n const queue = controller._queue;\n\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n } else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n\n if (!ready) {\n assert(controller._queueTotalSize === 0);\n assert(pullIntoDescriptor.bytesFilled > 0);\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n }\n\n return ready;\n}\n\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller: ReadableByteStreamController,\n size: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);\n assert(controller._byobRequest === null);\n pullIntoDescriptor.bytesFilled += size;\n}\n\nfunction ReadableByteStreamControllerHandleQueueDrain(controller: ReadableByteStreamController) {\n assert(controller._controlledReadableByteStream._state === 'readable');\n\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n } else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n}\n\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller: ReadableByteStreamController) {\n if (controller._byobRequest === null) {\n return;\n }\n\n controller._byobRequest._associatedReadableByteStreamController = undefined!;\n controller._byobRequest._view = null!;\n controller._byobRequest = null;\n}\n\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller: ReadableByteStreamController) {\n assert(!controller._closeRequested);\n\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n assert(pullIntoDescriptor.readerType !== 'none');\n\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n ReadableByteStreamControllerCommitPullIntoDescriptor(\n controller._controlledReadableByteStream,\n pullIntoDescriptor\n );\n }\n }\n}\n\nfunction ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller: ReadableByteStreamController) {\n const reader = controller._controlledReadableByteStream._reader;\n assert(IsReadableStreamDefaultReader(reader));\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n}\n\nexport function ReadableByteStreamControllerPullInto>(\n controller: ReadableByteStreamController,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = controller._controlledReadableByteStream;\n\n const ctor = view.constructor as ArrayBufferViewConstructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n\n const { byteOffset, byteLength } = view;\n\n const minimumFill = min * elementSize;\n assert(minimumFill >= elementSize && minimumFill <= byteLength);\n assert(minimumFill % elementSize === 0);\n\n let buffer: ArrayBuffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n } catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n\n const pullIntoDescriptor: BYOBPullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInClosedState(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.bytesFilled % firstDescriptor.elementSize === 0);\n\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n}\n\nfunction ReadableByteStreamControllerRespondInReadableState(controller: ReadableByteStreamController,\n bytesWritten: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n pullIntoDescriptor.buffer,\n end - remainderSize,\n remainderSize\n );\n }\n\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInternal(controller: ReadableByteStreamController, bytesWritten: number) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n assert(CanTransferArrayBuffer(firstDescriptor.buffer));\n\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n assert(bytesWritten === 0);\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n } else {\n assert(state === 'readable');\n assert(bytesWritten > 0);\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerShiftPendingPullInto(\n controller: ReadableByteStreamController\n): PullIntoDescriptor {\n assert(controller._byobRequest === null);\n const descriptor = controller._pendingPullIntos.shift()!;\n return descriptor;\n}\n\nfunction ReadableByteStreamControllerShouldCallPull(controller: ReadableByteStreamController): boolean {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return false;\n }\n\n if (controller._closeRequested) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableByteStreamControllerClearAlgorithms(controller: ReadableByteStreamController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\n\nexport function ReadableByteStreamControllerClose(controller: ReadableByteStreamController) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n\n return;\n }\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n throw e;\n }\n }\n\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n}\n\nexport function ReadableByteStreamControllerEnqueue(\n controller: ReadableByteStreamController,\n chunk: NonShared\n) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError(\n 'The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk'\n );\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n assert(controller._pendingPullIntos.length === 0);\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n } else {\n assert(controller._queue.length === 0);\n if (controller._pendingPullIntos.length > 0) {\n assert(controller._pendingPullIntos.peek().readerType === 'default');\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView as NonShared, false);\n }\n } else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n } else {\n assert(!IsReadableStreamLocked(stream));\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableByteStreamControllerError(controller: ReadableByteStreamController, e: any) {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableByteStreamControllerFillReadRequestFromQueue(\n controller: ReadableByteStreamController,\n readRequest: ReadRequest>\n) {\n assert(controller._queueTotalSize > 0);\n\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view as NonShared);\n}\n\nexport function ReadableByteStreamControllerGetBYOBRequest(\n controller: ReadableByteStreamController\n): ReadableStreamBYOBRequest | null {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer,\n firstDescriptor.byteOffset + firstDescriptor.bytesFilled,\n firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n\n const byobRequest: ReadableStreamBYOBRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view as NonShared);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n}\n\nfunction ReadableByteStreamControllerGetDesiredSize(controller: ReadableByteStreamController): number | null {\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nexport function ReadableByteStreamControllerRespond(controller: ReadableByteStreamController, bytesWritten: number) {\n assert(controller._pendingPullIntos.length > 0);\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n}\n\nexport function ReadableByteStreamControllerRespondWithNewView(controller: ReadableByteStreamController,\n view: NonShared) {\n assert(controller._pendingPullIntos.length > 0);\n assert(!IsDetachedBuffer(view.buffer));\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (view.byteLength === 0) {\n throw new TypeError(\n 'The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'\n );\n }\n }\n\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n}\n\nexport function SetUpReadableByteStreamController(stream: ReadableByteStream,\n controller: ReadableByteStreamController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n autoAllocateChunkSize: number | undefined) {\n assert(stream._readableStreamController === undefined);\n if (autoAllocateChunkSize !== undefined) {\n assert(NumberIsInteger(autoAllocateChunkSize));\n assert(autoAllocateChunkSize > 0);\n }\n\n controller._controlledReadableByteStream = stream;\n\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._byobRequest = null;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._closeRequested = false;\n controller._started = false;\n\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n\n controller._pendingPullIntos = new SimpleQueue();\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableByteStreamControllerFromUnderlyingSource(\n stream: ReadableByteStream,\n underlyingByteSource: ValidatedUnderlyingByteSource,\n highWaterMark: number\n) {\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n\n SetUpReadableByteStreamController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize\n );\n}\n\nfunction SetUpReadableStreamBYOBRequest(request: ReadableStreamBYOBRequest,\n controller: ReadableByteStreamController,\n view: NonShared) {\n assert(IsReadableByteStreamController(controller));\n assert(typeof view === 'object');\n assert(ArrayBuffer.isView(view));\n assert(!IsDetachedBuffer(view.buffer));\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n}\n\n// Helper functions for the ReadableStreamBYOBRequest.\n\nfunction byobRequestBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n}\n\n// Helper functions for the ReadableByteStreamController.\n\nfunction byteStreamControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n}\n","import { assertDictionary, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from '../readable-stream/reader-options';\n\nexport function convertReaderOptions(options: ReadableStreamGetReaderOptions | null | undefined,\n context: string): ReadableStreamGetReaderOptions {\n assertDictionary(options, context);\n const mode = options?.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n}\n\nfunction convertReadableStreamReaderMode(mode: string, context: string): 'byob' {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n}\n\nexport function convertByobReadOptions(\n options: ReadableStreamBYOBReaderReadOptions | null | undefined,\n context: string\n): ValidatedReadableStreamBYOBReaderReadOptions {\n assertDictionary(options, context);\n const min = options?.min ?? 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(\n min,\n `${context} has member 'min' that`\n )\n };\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, type ReadableByteStream, type ReadableStream } from '../readable-stream';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamController,\n ReadableByteStreamControllerPullInto\n} from './byte-stream-controller';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\nimport { IsDetachedBuffer } from '../abstract-ops/ecmascript';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from './reader-options';\nimport { convertByobReadOptions } from '../validators/reader-options';\nimport { isDataView, type NonShared, type TypedArray } from '../helpers/array-buffer-view';\n\n/**\n * A result returned by {@link ReadableStreamBYOBReader.read}.\n *\n * @public\n */\nexport type ReadableStreamBYOBReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value: T | undefined;\n};\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamBYOBReader(stream: ReadableByteStream): ReadableStreamBYOBReader {\n return new ReadableStreamBYOBReader(stream as ReadableStream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadIntoRequest>(\n stream: ReadableByteStream,\n readIntoRequest: ReadIntoRequest\n): void {\n assert(IsReadableStreamBYOBReader(stream._reader));\n assert(stream._state === 'readable' || stream._state === 'closed');\n\n (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);\n}\n\nexport function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,\n chunk: ArrayBufferView,\n done: boolean) {\n const reader = stream._reader as ReadableStreamBYOBReader;\n\n assert(reader._readIntoRequests.length > 0);\n\n const readIntoRequest = reader._readIntoRequests.shift()!;\n if (done) {\n readIntoRequest._closeSteps(chunk);\n } else {\n readIntoRequest._chunkSteps(chunk);\n }\n}\n\nexport function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {\n return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;\n}\n\nexport function ReadableStreamHasBYOBReader(stream: ReadableByteStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadIntoRequest> {\n _chunkSteps(chunk: T): void;\n\n _closeSteps(chunk: T | undefined): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamBYOBReader {\n /** @internal */\n _ownerReadableStream!: ReadableByteStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readIntoRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readIntoRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Attempts to reads bytes into view, and returns a promise resolved with the result.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(\n view: T,\n options?: ReadableStreamBYOBReaderReadOptions\n ): Promise>;\n read>(\n view: T,\n rawOptions: ReadableStreamBYOBReaderReadOptions | null | undefined = {}\n ): Promise> {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n\n let options: ValidatedReadableStreamBYOBReaderReadOptions;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > (view as unknown as TypedArray).length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n } else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamBYOBReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest: ReadIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamBYOBReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBReader;\n}\n\nexport function ReadableStreamBYOBReaderRead>(\n reader: ReadableStreamBYOBReader,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n } else {\n ReadableByteStreamControllerPullInto(\n stream._readableStreamController as ReadableByteStreamController,\n view,\n min,\n readIntoRequest\n );\n }\n}\n\nexport function ReadableStreamBYOBReaderRelease(reader: ReadableStreamBYOBReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n}\n\nexport function ReadableStreamBYOBReaderErrorReadIntoRequests(reader: ReadableStreamBYOBReader, e: any) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamBYOBReader.\n\nfunction byobReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport NumberIsNaN from '../../stub/number-isnan';\n\nexport function ExtractHighWaterMark(strategy: QueuingStrategy, defaultHWM: number): number {\n const { highWaterMark } = strategy;\n\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n\n return highWaterMark;\n}\n\nexport function ExtractSizeAlgorithm(strategy: QueuingStrategy): QueuingStrategySizeCallback {\n const { size } = strategy;\n\n if (!size) {\n return () => 1;\n }\n\n return size;\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport { assertDictionary, assertFunction, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategy(init: QueuingStrategy | null | undefined,\n context: string): QueuingStrategy {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n const size = init?.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n}\n\nfunction convertQueuingStrategySize(fn: QueuingStrategySizeCallback,\n context: string): QueuingStrategySizeCallback {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from '../writable-stream/underlying-sink';\nimport { WritableStreamDefaultController } from '../writable-stream';\n\nexport function convertUnderlyingSink(original: UnderlyingSink | null,\n context: string): ValidatedUnderlyingSink {\n assertDictionary(original, context);\n const abort = original?.abort;\n const close = original?.close;\n const start = original?.start;\n const type = original?.type;\n const write = original?.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original!, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original!, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original!, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original!, `${context} has member 'write' that`),\n type\n };\n}\n\nfunction convertUnderlyingSinkAbortCallback(\n fn: UnderlyingSinkAbortCallback,\n original: UnderlyingSink,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSinkCloseCallback(\n fn: UnderlyingSinkCloseCallback,\n original: UnderlyingSink,\n context: string\n): () => Promise {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n}\n\nfunction convertUnderlyingSinkStartCallback(\n fn: UnderlyingSinkStartCallback,\n original: UnderlyingSink,\n context: string\n): UnderlyingSinkStartCallback {\n assertFunction(fn, context);\n return (controller: WritableStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSinkWriteCallback(\n fn: UnderlyingSinkWriteCallback,\n original: UnderlyingSink,\n context: string\n): (chunk: W, controller: WritableStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: W, controller: WritableStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n","import { IsWritableStream, WritableStream } from '../writable-stream';\n\nexport function assertWritableStream(x: unknown, context: string): asserts x is WritableStream {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n}\n","/**\n * A signal object that allows you to communicate with a request and abort it if required\n * via its associated `AbortController` object.\n *\n * @remarks\n * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @public\n */\nexport interface AbortSignal {\n /**\n * Whether the request is aborted.\n */\n readonly aborted: boolean;\n\n /**\n * If aborted, returns the reason for aborting.\n */\n readonly reason?: any;\n\n /**\n * Add an event listener to be triggered when this signal becomes aborted.\n */\n addEventListener(type: 'abort', listener: () => void): void;\n\n /**\n * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}.\n */\n removeEventListener(type: 'abort', listener: () => void): void;\n}\n\nexport function isAbortSignal(value: unknown): value is AbortSignal {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof (value as AbortSignal).aborted === 'boolean';\n } catch {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n}\n\n/**\n * A controller object that allows you to abort an `AbortSignal` when desired.\n *\n * @remarks\n * This interface is compatible with the `AbortController` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @internal\n */\nexport interface AbortController {\n readonly signal: AbortSignal;\n\n abort(reason?: any): void;\n}\n\ninterface AbortControllerConstructor {\n new(): AbortController;\n}\n\nconst supportsAbortController = typeof (AbortController as any) === 'function';\n\n/**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\nexport function createAbortController(): AbortController | undefined {\n if (supportsAbortController) {\n return new (AbortController as AbortControllerConstructor)();\n }\n return undefined;\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponPromise\n} from './helpers/webidl';\nimport {\n DequeueValue,\n EnqueueValueWithSize,\n PeekQueueValue,\n type QueuePair,\n ResetQueue\n} from './abstract-ops/queue-with-sizes';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { SimpleQueue } from './simple-queue';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { AbortSteps, ErrorSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from './writable-stream/underlying-sink';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertUnderlyingSink } from './validators/underlying-sink';\nimport { assertWritableStream } from './validators/writable-stream';\nimport { type AbortController, type AbortSignal, createAbortController } from './abort-signal';\n\ntype WritableStreamState = 'writable' | 'closed' | 'erroring' | 'errored';\n\ninterface WriteOrCloseRequest {\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n}\n\ntype WriteRequest = WriteOrCloseRequest;\ntype CloseRequest = WriteOrCloseRequest;\n\ninterface PendingAbortRequest {\n _promise: Promise;\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n _reason: any;\n _wasAlreadyErroring: boolean;\n}\n\n/**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\nclass WritableStream {\n /** @internal */\n _state!: WritableStreamState;\n /** @internal */\n _storedError: any;\n /** @internal */\n _writer: WritableStreamDefaultWriter | undefined;\n /** @internal */\n _writableStreamController!: WritableStreamDefaultController;\n /** @internal */\n _writeRequests!: SimpleQueue;\n /** @internal */\n _inFlightWriteRequest: WriteRequest | undefined;\n /** @internal */\n _closeRequest: CloseRequest | undefined;\n /** @internal */\n _inFlightCloseRequest: CloseRequest | undefined;\n /** @internal */\n _pendingAbortRequest: PendingAbortRequest | undefined;\n /** @internal */\n _backpressure!: boolean;\n\n constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSink: UnderlyingSink | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n } else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n\n InitializeWritableStream(this);\n\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked(): boolean {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsWritableStreamLocked(this);\n }\n\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('abort'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n\n return WritableStreamAbort(this, reason);\n }\n\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('close'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamClose(this);\n }\n\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter(): WritableStreamDefaultWriter {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('getWriter');\n }\n\n return AcquireWritableStreamDefaultWriter(this);\n }\n}\n\nObject.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(WritableStream.prototype.abort, 'abort');\nsetFunctionName(WritableStream.prototype.close, 'close');\nsetFunctionName(WritableStream.prototype.getWriter, 'getWriter');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n}\n\nexport {\n AcquireWritableStreamDefaultWriter,\n CreateWritableStream,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamDefaultControllerErrorIfNeeded,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite,\n WritableStreamCloseQueuedOrInFlight\n};\n\nexport type {\n UnderlyingSink,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkAbortCallback\n};\n\n// Abstract operations for the WritableStream.\n\nfunction AcquireWritableStreamDefaultWriter(stream: WritableStream): WritableStreamDefaultWriter {\n return new WritableStreamDefaultWriter(stream);\n}\n\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: WritableStream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n\n const controller: WritableStreamDefaultController = Object.create(WritableStreamDefaultController.prototype);\n\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm,\n abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n}\n\nfunction InitializeWritableStream(stream: WritableStream) {\n stream._state = 'writable';\n\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n\n stream._writer = undefined;\n\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined!;\n\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n}\n\nfunction IsWritableStream(x: unknown): x is WritableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n\n return x instanceof WritableStream;\n}\n\nfunction IsWritableStreamLocked(stream: WritableStream): boolean {\n assert(IsWritableStream(stream));\n\n if (stream._writer === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamAbort(stream: WritableStream, reason: any): Promise {\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n stream._writableStreamController._abortController?.abort(reason);\n\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state as WritableStreamState;\n\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined!,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest!._promise = promise;\n\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n\n return promise;\n}\n\nfunction WritableStreamClose(stream: WritableStream): Promise {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(\n `The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n\n assert(state === 'writable' || state === 'erroring');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const promise = newPromise((resolve, reject) => {\n const closeRequest: CloseRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._closeRequest = closeRequest;\n });\n\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n\n return promise;\n}\n\n// WritableStream API exposed for controllers.\n\nfunction WritableStreamAddWriteRequest(stream: WritableStream): Promise {\n assert(IsWritableStreamLocked(stream));\n assert(stream._state === 'writable');\n\n const promise = newPromise((resolve, reject) => {\n const writeRequest: WriteRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._writeRequests.push(writeRequest);\n });\n\n return promise;\n}\n\nfunction WritableStreamDealWithRejection(stream: WritableStream, error: any) {\n const state = stream._state;\n\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n\n assert(state === 'erroring');\n WritableStreamFinishErroring(stream);\n}\n\nfunction WritableStreamStartErroring(stream: WritableStream, reason: any) {\n assert(stream._storedError === undefined);\n assert(stream._state === 'writable');\n\n const controller = stream._writableStreamController;\n assert(controller !== undefined);\n\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n}\n\nfunction WritableStreamFinishErroring(stream: WritableStream) {\n assert(stream._state === 'erroring');\n assert(!WritableStreamHasOperationMarkedInFlight(stream));\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(\n promise,\n () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n },\n (reason: any) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n}\n\nfunction WritableStreamFinishInFlightWrite(stream: WritableStream) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n}\n\nfunction WritableStreamFinishInFlightWriteWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._reject(error);\n stream._inFlightWriteRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n WritableStreamDealWithRejection(stream, error);\n}\n\nfunction WritableStreamFinishInFlightClose(stream: WritableStream) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n\n const state = stream._state;\n\n assert(state === 'writable' || state === 'erroring');\n\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n\n stream._state = 'closed';\n\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n\n assert(stream._pendingAbortRequest === undefined);\n assert(stream._storedError === undefined);\n}\n\nfunction WritableStreamFinishInFlightCloseWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._reject(error);\n stream._inFlightCloseRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n}\n\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream: WritableStream): boolean {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamHasOperationMarkedInFlight(stream: WritableStream): boolean {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamMarkCloseRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightCloseRequest === undefined);\n assert(stream._closeRequest !== undefined);\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n}\n\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightWriteRequest === undefined);\n assert(stream._writeRequests.length !== 0);\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\n\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream: WritableStream) {\n assert(stream._state === 'errored');\n if (stream._closeRequest !== undefined) {\n assert(stream._inFlightCloseRequest === undefined);\n\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n}\n\nfunction WritableStreamUpdateBackpressure(stream: WritableStream, backpressure: boolean) {\n assert(stream._state === 'writable');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n } else {\n assert(!backpressure);\n\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n\n stream._backpressure = backpressure;\n}\n\n/**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\nexport class WritableStreamDefaultWriter {\n /** @internal */\n _ownerWritableStream: WritableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _closedPromiseState!: 'pending' | 'resolved' | 'rejected';\n /** @internal */\n _readyPromise!: Promise;\n /** @internal */\n _readyPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _readyPromise_reject?: (reason: any) => void;\n /** @internal */\n _readyPromiseState!: 'pending' | 'fulfilled' | 'rejected';\n\n constructor(stream: WritableStream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n\n this._ownerWritableStream = stream;\n stream._writer = this;\n\n const state = stream._state;\n\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n } else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n } else {\n assert(state === 'errored');\n\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize(): number | null {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n\n return this._readyPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamDefaultWriterClose(this);\n }\n\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock(): void {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return;\n }\n\n assert(stream._writer !== undefined);\n\n WritableStreamDefaultWriterRelease(this);\n }\n\n /**\n * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully,\n * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return\n * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes\n * errored before the writing process is initiated.\n *\n * Note that what \"success\" means is up to the underlying sink; it might indicate simply that the chunk has been\n * accepted, and not necessarily that it is safely saved to its ultimate destination.\n */\n write(chunk: W): Promise;\n write(chunk: W = undefined!): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n});\nsetFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\nsetFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\nsetFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\nsetFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n}\n\n// Abstract operations for the WritableStreamDefaultWriter.\n\nfunction IsWritableStreamDefaultWriter(x: any): x is WritableStreamDefaultWriter {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultWriter;\n}\n\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultWriterAbort(writer: WritableStreamDefaultWriter, reason: any) {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamAbort(stream, reason);\n}\n\nfunction WritableStreamDefaultWriterClose(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamClose(stream);\n}\n\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n return WritableStreamDefaultWriterClose(writer);\n}\n\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n } else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n } else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterGetDesiredSize(writer: WritableStreamDefaultWriter): number | null {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n\n if (state === 'closed') {\n return 0;\n }\n\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\n\nfunction WritableStreamDefaultWriterRelease(writer: WritableStreamDefaultWriter) {\n const stream = writer._ownerWritableStream;\n assert(stream !== undefined);\n assert(stream._writer === writer);\n\n const releasedError = new TypeError(\n `Writer was released and can no longer be used to monitor the stream's closedness`);\n\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n\n stream._writer = undefined;\n writer._ownerWritableStream = undefined!;\n}\n\nfunction WritableStreamDefaultWriterWrite(writer: WritableStreamDefaultWriter, chunk: W): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const controller = stream._writableStreamController;\n\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable');\n\n const promise = WritableStreamAddWriteRequest(stream);\n\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n\n return promise;\n}\n\nconst closeSentinel: unique symbol = {} as any;\n\ntype QueueRecord = W | typeof closeSentinel;\n\n/**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\nexport class WritableStreamDefaultController {\n /** @internal */\n _controlledWritableStream!: WritableStream;\n /** @internal */\n _queue!: SimpleQueue>>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _abortReason: any;\n /** @internal */\n _abortController: AbortController | undefined;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _writeAlgorithm!: (chunk: W) => Promise;\n /** @internal */\n _closeAlgorithm!: () => Promise;\n /** @internal */\n _abortAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason(): any {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('abortReason');\n }\n return this._abortReason;\n }\n\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal(): AbortSignal {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e: any = undefined): void {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n\n WritableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [AbortSteps](reason: any): Promise {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations implementing interface required by the WritableStream.\n\nfunction IsWritableStreamDefaultController(x: any): x is WritableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultController;\n}\n\nfunction SetUpWritableStreamDefaultController(stream: WritableStream,\n controller: WritableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(IsWritableStream(stream));\n assert(stream._writableStreamController === undefined);\n\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(\n startPromise,\n () => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n r => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n }\n );\n}\n\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream: WritableStream,\n underlyingSink: ValidatedUnderlyingSink,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let writeAlgorithm: (chunk: W) => Promise;\n let closeAlgorithm: () => Promise;\n let abortAlgorithm: (reason: any) => Promise;\n\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write!(chunk, controller);\n } else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close!();\n } else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort!(reason);\n } else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpWritableStreamDefaultController(\n stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\nfunction WritableStreamDefaultControllerClearAlgorithms(controller: WritableStreamDefaultController) {\n controller._writeAlgorithm = undefined!;\n controller._closeAlgorithm = undefined!;\n controller._abortAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\nfunction WritableStreamDefaultControllerClose(controller: WritableStreamDefaultController) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\nfunction WritableStreamDefaultControllerGetChunkSize(controller: WritableStreamDefaultController,\n chunk: W): number {\n try {\n return controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n}\n\nfunction WritableStreamDefaultControllerGetDesiredSize(controller: WritableStreamDefaultController): number {\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nfunction WritableStreamDefaultControllerWrite(controller: WritableStreamDefaultController,\n chunk: W,\n chunkSize: number) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\n// Abstract operations for the WritableStreamDefaultController.\n\nfunction WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n if (!controller._started) {\n return;\n }\n\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n\n const state = stream._state;\n assert(state !== 'closed' && state !== 'errored');\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n\n if (controller._queue.length === 0) {\n return;\n }\n\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n } else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n}\n\nfunction WritableStreamDefaultControllerErrorIfNeeded(controller: WritableStreamDefaultController, error: any) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n}\n\nfunction WritableStreamDefaultControllerProcessClose(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkCloseRequestInFlight(stream);\n\n DequeueValue(controller);\n assert(controller._queue.length === 0);\n\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(\n sinkClosePromise,\n () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n },\n reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerProcessWrite(controller: WritableStreamDefaultController, chunk: W) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(\n sinkWritePromise,\n () => {\n WritableStreamFinishInFlightWrite(stream);\n\n const state = stream._state;\n assert(state === 'writable' || state === 'erroring');\n\n DequeueValue(controller);\n\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerGetBackpressure(controller: WritableStreamDefaultController): boolean {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n}\n\n// A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultControllerError(controller: WritableStreamDefaultController, error: any) {\n const stream = controller._controlledWritableStream;\n\n assert(stream._state === 'writable');\n\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n}\n\n// Helper functions for the WritableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n}\n\n// Helper functions for the WritableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n}\n\n\n// Helper functions for the WritableStreamDefaultWriter.\n\nfunction defaultWriterBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n}\n\nfunction defaultWriterLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n}\n\nfunction defaultWriterClosedPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n}\n\nfunction defaultWriterClosedPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n}\n\nfunction defaultWriterClosedPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n}\n\nfunction defaultWriterClosedPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._closedPromise_resolve === undefined);\n assert(writer._closedPromise_reject === undefined);\n assert(writer._closedPromiseState !== 'pending');\n\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n}\n\nfunction defaultWriterReadyPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n}\n\nfunction defaultWriterReadyPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n}\n\nfunction defaultWriterReadyPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n}\n\nfunction defaultWriterReadyPromiseReset(writer: WritableStreamDefaultWriter) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitialize(writer);\n}\n\nfunction defaultWriterReadyPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n}\n","/// \n\nfunction getGlobals(): typeof globalThis | undefined {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n } else if (typeof self !== 'undefined') {\n return self;\n } else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n}\n\nexport const globals = getGlobals();\n","/// \nimport { globals } from '../globals';\nimport { setFunctionName } from '../lib/helpers/miscellaneous';\n\ninterface DOMException extends Error {\n name: string;\n message: string;\n}\n\ntype DOMExceptionConstructor = new (message?: string, name?: string) => DOMException;\n\nfunction isDOMExceptionConstructor(ctor: unknown): ctor is DOMExceptionConstructor {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if ((ctor as DOMExceptionConstructor).name !== 'DOMException') {\n return false;\n }\n try {\n new (ctor as DOMExceptionConstructor)();\n return true;\n } catch {\n return false;\n }\n}\n\n/**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\nfunction getFromGlobal(): DOMExceptionConstructor | undefined {\n const ctor = globals?.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n}\n\n/**\n * Support:\n * - All platforms\n */\nfunction createPolyfill(): DOMExceptionConstructor {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(this: DOMException, message?: string, name?: string) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n } as any;\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-redeclare\nconst DOMException: DOMExceptionConstructor = getFromGlobal() || createPolyfill();\n\nexport { DOMException };\n","import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';\nimport { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireWritableStreamDefaultWriter,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamCloseQueuedOrInFlight,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite\n} from '../writable-stream';\nimport assert from '../../stub/assert';\nimport {\n newPromise,\n PerformPromiseThen,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponFulfillment,\n uponPromise,\n uponRejection\n} from '../helpers/webidl';\nimport { noop } from '../../utils';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\nimport { DOMException } from '../../stub/dom-exception';\n\nexport function ReadableStreamPipeTo(source: ReadableStream,\n dest: WritableStream,\n preventClose: boolean,\n preventAbort: boolean,\n preventCancel: boolean,\n signal: AbortSignal | undefined): Promise {\n assert(IsReadableStream(source));\n assert(IsWritableStream(dest));\n assert(typeof preventClose === 'boolean');\n assert(typeof preventAbort === 'boolean');\n assert(typeof preventCancel === 'boolean');\n assert(signal === undefined || isAbortSignal(signal));\n assert(!IsReadableStreamLocked(source));\n assert(!IsWritableStreamLocked(dest));\n\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n\n source._disturbed = true;\n\n let shuttingDown = false;\n\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n\n return newPromise((resolve, reject) => {\n let abortAlgorithm: () => void;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions: Array<() => Promise> = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n\n signal.addEventListener('abort', abortAlgorithm);\n }\n\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done: boolean) {\n if (done) {\n resolveLoop();\n } else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n\n next(false);\n });\n }\n\n function pipeStep(): Promise {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(\n reader,\n {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n }\n );\n });\n });\n }\n\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n } else {\n shutdown();\n }\n return null;\n });\n\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n } else {\n shutdown(true, destClosed);\n }\n }\n\n setPromiseIsHandledToTrue(pipeLoop());\n\n function waitForWritesToFinish(): Promise {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(\n currentWrite,\n () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined\n );\n }\n\n function isOrBecomesErrored(stream: ReadableStream | WritableStream,\n promise: Promise,\n action: (reason: any) => null) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n } else {\n uponRejection(promise, action);\n }\n }\n\n function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise, action: () => null) {\n if (stream._state === 'closed') {\n action();\n } else {\n uponFulfillment(promise, action);\n }\n }\n\n function shutdownWithAction(action: () => Promise, originalIsError?: boolean, originalError?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n } else {\n doTheRest();\n }\n\n function doTheRest(): null {\n uponPromise(\n action(),\n () => finalize(originalIsError, originalError),\n newError => finalize(true, newError)\n );\n return null;\n }\n }\n\n function shutdown(isError?: boolean, error?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n } else {\n finalize(isError, error);\n }\n }\n\n function finalize(isError?: boolean, error?: any): null {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n } else {\n resolve(undefined);\n }\n\n return null;\n }\n });\n}\n","import type { QueuingStrategySizeCallback } from '../queuing-strategy';\nimport assert from '../../stub/assert';\nimport { DequeueValue, EnqueueValueWithSize, type QueuePair, ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n type ReadRequest\n} from './default-reader';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsReadableStreamLocked, ReadableStream, ReadableStreamClose, ReadableStreamError } from '../readable-stream';\nimport type { ValidatedUnderlyingSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\n\n/**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableStreamDefaultController {\n /** @internal */\n _controlledReadableStream!: ReadableStream;\n /** @internal */\n _queue!: SimpleQueue>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('close');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n\n ReadableStreamDefaultControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the controlled readable stream.\n */\n enqueue(chunk: R): void;\n enqueue(chunk: R = undefined!): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n ReadableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest): void {\n const stream = this._controlledReadableStream;\n\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n } else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n\n readRequest._chunkSteps(chunk);\n } else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n // Do nothing.\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\nsetFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableStreamDefaultController.\n\nfunction IsReadableStreamDefaultController(x: any): x is ReadableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultController;\n}\n\nfunction ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController): void {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController): boolean {\n const stream = controller._controlledReadableStream;\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\n// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n\nexport function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n controller._closeRequested = true;\n\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n}\n\nexport function ReadableStreamDefaultControllerEnqueue(\n controller: ReadableStreamDefaultController,\n chunk: R\n): void {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n } else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController, e: any) {\n const stream = controller._controlledReadableStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ResetQueue(controller);\n\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableStreamDefaultControllerGetDesiredSize(\n controller: ReadableStreamDefaultController\n): number | null {\n const state = controller._controlledReadableStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\n// This is used in the implementation of TransformStream.\nexport function ReadableStreamDefaultControllerHasBackpressure(\n controller: ReadableStreamDefaultController\n): boolean {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n\n return true;\n}\n\nexport function ReadableStreamDefaultControllerCanCloseOrEnqueue(\n controller: ReadableStreamDefaultController\n): boolean {\n const state = controller._controlledReadableStream._state;\n\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n\n return false;\n}\n\nexport function SetUpReadableStreamDefaultController(stream: ReadableStream,\n controller: ReadableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(stream._readableStreamController === undefined);\n\n controller._controlledReadableStream = stream;\n\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n stream: ReadableStream,\n underlyingSource: ValidatedUnderlyingSource,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback\n) {\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// Helper functions for the ReadableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n}\n","import {\n CreateReadableByteStream,\n CreateReadableStream,\n type DefaultReadableStream,\n IsReadableStream,\n type ReadableByteStream,\n ReadableStream,\n ReadableStreamCancel,\n type ReadableStreamReader\n} from '../readable-stream';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadRequest\n} from './default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReaderRead,\n type ReadIntoRequest\n} from './byob-reader';\nimport assert from '../../stub/assert';\nimport { newPromise, promiseResolvedWith, queueMicrotask, uponRejection } from '../helpers/webidl';\nimport {\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError\n} from './default-controller';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamControllerClose,\n ReadableByteStreamControllerEnqueue,\n ReadableByteStreamControllerError,\n ReadableByteStreamControllerGetBYOBRequest,\n ReadableByteStreamControllerRespond,\n ReadableByteStreamControllerRespondWithNewView\n} from './byte-stream-controller';\nimport { CreateArrayFromList } from '../abstract-ops/ecmascript';\nimport { CloneAsUint8Array } from '../abstract-ops/miscellaneous';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function ReadableStreamTee(stream: ReadableStream,\n cloneForBranch2: boolean): [ReadableStream, ReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream as unknown as ReadableByteStream) as\n unknown as [ReadableStream, ReadableStream];\n }\n return ReadableStreamDefaultTee(stream, cloneForBranch2);\n}\n\nexport function ReadableStreamDefaultTee(\n stream: ReadableStream,\n cloneForBranch2: boolean\n): [DefaultReadableStream, DefaultReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n\n const reader = AcquireReadableStreamDefaultReader(stream);\n\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: DefaultReadableStream;\n let branch2: DefaultReadableStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function pullAlgorithm(): Promise {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm() {\n // do nothing\n }\n\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n\n uponRejection(reader._closedPromise, (r: any) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n\n return [branch1, branch2];\n}\n\nexport function ReadableByteStreamTee(stream: ReadableByteStream): [ReadableByteStream, ReadableByteStream] {\n assert(IsReadableStream(stream));\n assert(IsReadableByteStreamController(stream._readableStreamController));\n\n let reader: ReadableStreamReader> = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: ReadableByteStream;\n let branch2: ReadableByteStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function forwardReaderError(thisReader: ReadableStreamReader>) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n assert(reader._readIntoRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n\n const readRequest: ReadRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n\n function pullWithBYOBReader(view: NonShared, forBranch2: boolean) {\n if (IsReadableStreamDefaultReader>(reader)) {\n assert(reader._readRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n\n const readIntoRequest: ReadIntoRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n } else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n\n if (chunk !== undefined) {\n assert(chunk.byteLength === 0);\n\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n\n function pull1Algorithm(): Promise {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, false);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function pull2Algorithm(): Promise {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, true);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm(): void {\n return;\n }\n\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n\n forwardReaderError(reader);\n\n return [branch1, branch2];\n}\n","import { typeIsObject } from '../helpers/miscellaneous';\nimport type { ReadableStreamDefaultReadResult } from './default-reader';\n\n/**\n * A common interface for a `ReadadableStream` implementation.\n *\n * @public\n */\nexport interface ReadableStreamLike {\n readonly locked: boolean;\n\n getReader(): ReadableStreamDefaultReaderLike;\n}\n\n/**\n * A common interface for a `ReadableStreamDefaultReader` implementation.\n *\n * @public\n */\nexport interface ReadableStreamDefaultReaderLike {\n readonly closed: Promise;\n\n cancel(reason?: any): Promise;\n\n read(): Promise>;\n\n releaseLock(): void;\n}\n\nexport function isReadableStreamLike(stream: unknown): stream is ReadableStreamLike {\n return typeIsObject(stream) && typeof (stream as ReadableStreamLike).getReader !== 'undefined';\n}\n","import { CreateReadableStream, type DefaultReadableStream } from '../readable-stream';\nimport {\n isReadableStreamLike,\n type ReadableStreamDefaultReaderLike,\n type ReadableStreamLike\n} from './readable-stream-like';\nimport { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue } from './default-controller';\nimport { GetIterator, GetMethod, IteratorComplete, IteratorNext, IteratorValue } from '../abstract-ops/ecmascript';\nimport { promiseRejectedWith, promiseResolvedWith, reflectCall, transformPromiseWith } from '../helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport { noop } from '../../utils';\n\nexport function ReadableStreamFrom(\n source: Iterable | AsyncIterable | ReadableStreamLike\n): DefaultReadableStream {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n}\n\nexport function ReadableStreamFromIterable(asyncIterable: Iterable | AsyncIterable): DefaultReadableStream {\n let stream: DefaultReadableStream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n const iterator = iteratorRecord.iterator;\n let returnMethod: (typeof iterator)['return'] | undefined;\n try {\n returnMethod = GetMethod(iterator, 'return');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult: IteratorResult | Promise>;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n\nexport function ReadableStreamFromDefaultReader(\n reader: ReadableStreamDefaultReaderLike\n): DefaultReadableStream {\n let stream: DefaultReadableStream;\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let readPromise;\n try {\n readPromise = reader.read();\n } catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n } catch (e) {\n return promiseRejectedWith(e);\n }\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n","import { assertDictionary, assertFunction, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamController,\n UnderlyingByteSource,\n UnderlyingDefaultOrByteSource,\n UnderlyingDefaultOrByteSourcePullCallback,\n UnderlyingDefaultOrByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n ValidatedUnderlyingDefaultOrByteSource\n} from '../readable-stream/underlying-source';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\n\nexport function convertUnderlyingDefaultOrByteSource(\n source: UnderlyingSource | UnderlyingByteSource | null,\n context: string\n): ValidatedUnderlyingDefaultOrByteSource {\n assertDictionary(source, context);\n const original = source as (UnderlyingDefaultOrByteSource | null);\n const autoAllocateChunkSize = original?.autoAllocateChunkSize;\n const cancel = original?.cancel;\n const pull = original?.pull;\n const start = original?.start;\n const type = original?.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(\n autoAllocateChunkSize,\n `${context} has member 'autoAllocateChunkSize' that`\n ),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original!, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original!, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n}\n\nfunction convertUnderlyingSourceCancelCallback(\n fn: UnderlyingSourceCancelCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSourcePullCallback(\n fn: UnderlyingDefaultOrByteSourcePullCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (controller: ReadableStreamController) => Promise {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSourceStartCallback(\n fn: UnderlyingDefaultOrByteSourceStartCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): UnderlyingDefaultOrByteSourceStartCallback {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertReadableStreamType(type: string, context: string): 'bytes' {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n}\n","import { assertDictionary } from './basic';\nimport type {\n ReadableStreamIteratorOptions,\n ValidatedReadableStreamIteratorOptions\n} from '../readable-stream/iterator-options';\n\nexport function convertIteratorOptions(options: ReadableStreamIteratorOptions | null | undefined,\n context: string): ValidatedReadableStreamIteratorOptions {\n assertDictionary(options, context);\n const preventCancel = options?.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n}\n","import { assertDictionary } from './basic';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from '../readable-stream/pipe-options';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\n\nexport function convertPipeOptions(options: StreamPipeOptions | null | undefined,\n context: string): ValidatedStreamPipeOptions {\n assertDictionary(options, context);\n const preventAbort = options?.preventAbort;\n const preventCancel = options?.preventCancel;\n const preventClose = options?.preventClose;\n const signal = options?.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n}\n\nfunction assertAbortSignal(signal: unknown, context: string): asserts signal is AbortSignal {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n}\n","import { assertDictionary, assertRequiredField } from './basic';\nimport { ReadableStream } from '../readable-stream';\nimport { WritableStream } from '../writable-stream';\nimport { assertReadableStream } from './readable-stream';\nimport { assertWritableStream } from './writable-stream';\n\nexport function convertReadableWritablePair(\n pair: { readable: RS; writable: WS } | null | undefined,\n context: string\n): { readable: RS; writable: WS } {\n assertDictionary(pair, context);\n\n const readable = pair?.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n\n const writable = pair?.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n\n return { readable, writable };\n}\n","import assert from '../stub/assert';\nimport {\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith\n} from './helpers/webidl';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { AcquireReadableStreamAsyncIterator, type ReadableStreamAsyncIterator } from './readable-stream/async-iterator';\nimport { defaultReaderClosedPromiseReject, defaultReaderClosedPromiseResolve } from './readable-stream/generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderErrorReadRequests,\n type ReadableStreamDefaultReadResult\n} from './readable-stream/default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBReaderErrorReadIntoRequests,\n type ReadableStreamBYOBReadResult\n} from './readable-stream/byob-reader';\nimport { ReadableStreamPipeTo } from './readable-stream/pipe';\nimport { ReadableStreamTee } from './readable-stream/tee';\nimport { ReadableStreamFrom } from './readable-stream/from';\nimport { IsWritableStream, IsWritableStreamLocked, WritableStream } from './writable-stream';\nimport { SimpleQueue } from './simple-queue';\nimport {\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n SetUpReadableByteStreamController,\n SetUpReadableByteStreamControllerFromUnderlyingSource\n} from './readable-stream/byte-stream-controller';\nimport {\n ReadableStreamDefaultController,\n SetUpReadableStreamDefaultController,\n SetUpReadableStreamDefaultControllerFromUnderlyingSource\n} from './readable-stream/default-controller';\nimport type {\n UnderlyingByteSource,\n UnderlyingByteSourcePullCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceStartCallback\n} from './readable-stream/underlying-source';\nimport { noop } from '../utils';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { CreateArrayFromList, SymbolAsyncIterator } from './abstract-ops/ecmascript';\nimport { CancelSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertUnderlyingDefaultOrByteSource } from './validators/underlying-source';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions\n} from './readable-stream/reader-options';\nimport { convertReaderOptions } from './validators/reader-options';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from './readable-stream/pipe-options';\nimport type { ReadableStreamIteratorOptions } from './readable-stream/iterator-options';\nimport { convertIteratorOptions } from './validators/iterator-options';\nimport { convertPipeOptions } from './validators/pipe-options';\nimport type { ReadableWritablePair } from './readable-stream/readable-writable-pair';\nimport { convertReadableWritablePair } from './validators/readable-writable-pair';\nimport type { ReadableStreamDefaultReaderLike, ReadableStreamLike } from './readable-stream/readable-stream-like';\nimport type { NonShared } from './helpers/array-buffer-view';\n\nexport type DefaultReadableStream = ReadableStream & {\n _readableStreamController: ReadableStreamDefaultController\n};\n\nexport type ReadableByteStream = ReadableStream> & {\n _readableStreamController: ReadableByteStreamController\n};\n\ntype ReadableStreamState = 'readable' | 'closed' | 'errored';\n\n/**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\nexport class ReadableStream implements AsyncIterable {\n /** @internal */\n _state!: ReadableStreamState;\n /** @internal */\n _reader: ReadableStreamReader | undefined;\n /** @internal */\n _storedError: any;\n /** @internal */\n _disturbed!: boolean;\n /** @internal */\n _readableStreamController!: ReadableStreamDefaultController | ReadableByteStreamController;\n\n constructor(underlyingSource: UnderlyingByteSource, strategy?: { highWaterMark?: number; size?: undefined });\n constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSource: UnderlyingSource | UnderlyingByteSource | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n } else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n\n InitializeReadableStream(this);\n\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(\n this as unknown as ReadableByteStream,\n underlyingSource,\n highWaterMark\n );\n } else {\n assert(underlyingSource.type === undefined);\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n this,\n underlyingSource,\n highWaterMark,\n sizeAlgorithm\n );\n }\n }\n\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked(): boolean {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsReadableStreamLocked(this);\n }\n\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('cancel'));\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n\n return ReadableStreamCancel(this, reason);\n }\n\n /**\n * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader.\n *\n * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams,\n * i.e. streams which were constructed specifically with the ability to handle \"bring your own buffer\" reading.\n * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its\n * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise\n * control over allocation.\n */\n getReader({ mode }: { mode: 'byob' }): ReadableStreamBYOBReader;\n /**\n * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader.\n * While the stream is locked, no other reader can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to consume a stream\n * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours\n * or cancel the stream, which would interfere with your abstraction.\n */\n getReader(): ReadableStreamDefaultReader;\n getReader(\n rawOptions: ReadableStreamGetReaderOptions | null | undefined = undefined\n ): ReadableStreamDefaultReader | ReadableStreamBYOBReader {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('getReader');\n }\n\n const options = convertReaderOptions(rawOptions, 'First parameter');\n\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n\n assert(options.mode === 'byob');\n return AcquireReadableStreamBYOBReader(this as unknown as ReadableByteStream);\n }\n\n /**\n * Provides a convenient, chainable way of piping this readable stream through a transform stream\n * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream\n * into the writable side of the supplied pair, and returns the readable side for further use.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeThrough(\n transform: { readable: RS; writable: WritableStream },\n options?: StreamPipeOptions\n ): RS;\n pipeThrough(\n rawTransform: { readable: RS; writable: WritableStream } | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}\n ): RS {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n\n const promise = ReadableStreamPipeTo(\n this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n\n setPromiseIsHandledToTrue(promise);\n\n return transform.readable;\n }\n\n /**\n * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under\n * various error conditions can be customized with a number of passed options. It returns a promise that fulfills\n * when the piping process completes successfully, or rejects if any errors were encountered.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise;\n pipeTo(destination: WritableStream | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('pipeTo'));\n }\n\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(\n new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)\n );\n }\n\n let options: ValidatedStreamPipeOptions;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')\n );\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')\n );\n }\n\n return ReadableStreamPipeTo(\n this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n }\n\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee(): [ReadableStream, ReadableStream] {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('tee');\n }\n\n const branches = ReadableStreamTee(this, false);\n return CreateArrayFromList(branches);\n }\n\n /**\n * Asynchronously iterates over the chunks in the stream's internal queue.\n *\n * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader.\n * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method\n * is called, e.g. by breaking out of the loop.\n *\n * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also\n * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing\n * `true` for the `preventCancel` option.\n */\n values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n values(rawOptions: ReadableStreamIteratorOptions | null | undefined = undefined): ReadableStreamAsyncIterator {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('values');\n }\n\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n\n /**\n * {@inheritDoc ReadableStream.values}\n */\n [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n\n [SymbolAsyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator {\n // Stub implementation, overridden below\n return this.values(options);\n }\n\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream {\n return ReadableStreamFrom(asyncIterable);\n }\n}\n\nObject.defineProperties(ReadableStream, {\n from: { enumerable: true }\n});\nObject.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(ReadableStream.from, 'from');\nsetFunctionName(ReadableStream.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStream.prototype.getReader, 'getReader');\nsetFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\nsetFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\nsetFunctionName(ReadableStream.prototype.tee, 'tee');\nsetFunctionName(ReadableStream.prototype.values, 'values');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n}\nObject.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n});\n\nexport type {\n ReadableStreamAsyncIterator,\n ReadableStreamDefaultReadResult,\n ReadableStreamBYOBReadResult,\n ReadableStreamBYOBReaderReadOptions,\n UnderlyingByteSource,\n UnderlyingSource,\n UnderlyingSourceStartCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceCancelCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingByteSourcePullCallback,\n StreamPipeOptions,\n ReadableWritablePair,\n ReadableStreamIteratorOptions,\n ReadableStreamLike,\n ReadableStreamDefaultReaderLike\n};\n\n// Abstract operations for the ReadableStream.\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1\n): DefaultReadableStream {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: DefaultReadableStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n\n return stream;\n}\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableByteStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise\n): ReadableByteStream {\n const stream: ReadableByteStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n\n return stream;\n}\n\nfunction InitializeReadableStream(stream: ReadableStream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n}\n\nexport function IsReadableStream(x: unknown): x is ReadableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStream;\n}\n\nexport function IsReadableStreamDisturbed(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n return stream._disturbed;\n}\n\nexport function IsReadableStreamLocked(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n if (stream._reader === undefined) {\n return false;\n }\n\n return true;\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamCancel(stream: ReadableStream, reason: any): Promise {\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n ReadableStreamClose(stream);\n\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n}\n\nexport function ReadableStreamClose(stream: ReadableStream): void {\n assert(stream._state === 'readable');\n\n stream._state = 'closed';\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseResolve(reader);\n\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n}\n\nexport function ReadableStreamError(stream: ReadableStream, e: any): void {\n assert(IsReadableStream(stream));\n assert(stream._state === 'readable');\n\n stream._state = 'errored';\n stream._storedError = e;\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseReject(reader, e);\n\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n } else {\n assert(IsReadableStreamBYOBReader(reader));\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n}\n\n// Readers\n\nexport type ReadableStreamReader = ReadableStreamDefaultReader | ReadableStreamBYOBReader;\n\nexport {\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader\n};\n\n// Controllers\n\nexport {\n ReadableStreamDefaultController,\n ReadableStreamBYOBRequest,\n ReadableByteStreamController\n};\n\n// Helper functions for the ReadableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n}\n","import type { QueuingStrategyInit } from '../queuing-strategy';\nimport { assertDictionary, assertRequiredField, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategyInit(init: QueuingStrategyInit | null | undefined,\n context: string): QueuingStrategyInit {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst byteLengthSizeFunction = (chunk: ArrayBufferView): number => {\n return chunk.byteLength;\n};\nsetFunctionName(byteLengthSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\nexport default class ByteLengthQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _byteLengthQueuingStrategyHighWaterMark: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size(): (chunk: ArrayBufferView) => number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n}\n\nObject.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the ByteLengthQueuingStrategy.\n\nfunction byteLengthBrandCheckException(name: string): TypeError {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n}\n\nexport function IsByteLengthQueuingStrategy(x: any): x is ByteLengthQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof ByteLengthQueuingStrategy;\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst countSizeFunction = (): 1 => {\n return 1;\n};\nsetFunctionName(countSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\nexport default class CountQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _countQueuingStrategyHighWaterMark!: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size(): (chunk: any) => 1 {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n}\n\nObject.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the CountQueuingStrategy.\n\nfunction countBrandCheckException(name: string): TypeError {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n}\n\nexport function IsCountQueuingStrategy(x: any): x is CountQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof CountQueuingStrategy;\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from '../transform-stream/transformer';\nimport { TransformStreamDefaultController } from '../transform-stream';\n\nexport function convertTransformer(original: Transformer | null,\n context: string): ValidatedTransformer {\n assertDictionary(original, context);\n const cancel = original?.cancel;\n const flush = original?.flush;\n const readableType = original?.readableType;\n const start = original?.start;\n const transform = original?.transform;\n const writableType = original?.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original!, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original!, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original!, `${context} has member 'transform' that`),\n writableType\n };\n}\n\nfunction convertTransformerFlushCallback(\n fn: TransformerFlushCallback,\n original: Transformer,\n context: string\n): (controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertTransformerStartCallback(\n fn: TransformerStartCallback,\n original: Transformer,\n context: string\n): TransformerStartCallback {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertTransformerTransformCallback(\n fn: TransformerTransformCallback,\n original: Transformer,\n context: string\n): (chunk: I, controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: I, controller: TransformStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n\nfunction convertTransformerCancelCallback(\n fn: TransformerCancelCallback,\n original: Transformer,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith,\n uponPromise\n} from './helpers/webidl';\nimport { CreateReadableStream, type DefaultReadableStream, ReadableStream } from './readable-stream';\nimport {\n ReadableStreamDefaultControllerCanCloseOrEnqueue,\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError,\n ReadableStreamDefaultControllerGetDesiredSize,\n ReadableStreamDefaultControllerHasBackpressure\n} from './readable-stream/default-controller';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { CreateWritableStream, WritableStream, WritableStreamDefaultControllerErrorIfNeeded } from './writable-stream';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from './transform-stream/transformer';\nimport { convertTransformer } from './validators/transformer';\n\n// Class TransformStream\n\n/**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\nexport class TransformStream {\n /** @internal */\n _writable!: WritableStream;\n /** @internal */\n _readable!: DefaultReadableStream;\n /** @internal */\n _backpressure!: boolean;\n /** @internal */\n _backpressureChangePromise!: Promise;\n /** @internal */\n _backpressureChangePromise_resolve!: () => void;\n /** @internal */\n _transformStreamController!: TransformStreamDefaultController;\n\n constructor(\n transformer?: Transformer,\n writableStrategy?: QueuingStrategy,\n readableStrategy?: QueuingStrategy\n );\n constructor(rawTransformer: Transformer | null | undefined = {},\n rawWritableStrategy: QueuingStrategy | null | undefined = {},\n rawReadableStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(\n this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm\n );\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n } else {\n startPromise_resolve(undefined);\n }\n }\n\n /**\n * The readable side of the transform stream.\n */\n get readable(): ReadableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n\n return this._readable;\n }\n\n /**\n * The writable side of the transform stream.\n */\n get writable(): WritableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n\n return this._writable;\n }\n}\n\nObject.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n}\n\nexport type {\n Transformer,\n TransformerCancelCallback,\n TransformerStartCallback,\n TransformerFlushCallback,\n TransformerTransformCallback\n};\n\n// Transform Stream Abstract Operations\n\nexport function CreateTransformStream(startAlgorithm: () => void | PromiseLike,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n writableHighWaterMark = 1,\n writableSizeAlgorithm: QueuingStrategySizeCallback = () => 1,\n readableHighWaterMark = 0,\n readableSizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(writableHighWaterMark));\n assert(IsNonNegativeNumber(readableHighWaterMark));\n\n const stream: TransformStream = Object.create(TransformStream.prototype);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n\n const startResult = startAlgorithm();\n startPromise_resolve(startResult);\n return stream;\n}\n\nfunction InitializeTransformStream(stream: TransformStream,\n startPromise: Promise,\n writableHighWaterMark: number,\n writableSizeAlgorithm: QueuingStrategySizeCallback,\n readableHighWaterMark: number,\n readableSizeAlgorithm: QueuingStrategySizeCallback) {\n function startAlgorithm(): Promise {\n return startPromise;\n }\n\n function writeAlgorithm(chunk: I): Promise {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n\n function abortAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n\n function closeAlgorithm(): Promise {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm,\n writableHighWaterMark, writableSizeAlgorithm);\n\n function pullAlgorithm(): Promise {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n\n function cancelAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined!;\n stream._backpressureChangePromise = undefined!;\n stream._backpressureChangePromise_resolve = undefined!;\n TransformStreamSetBackpressure(stream, true);\n\n stream._transformStreamController = undefined!;\n}\n\nfunction IsTransformStream(x: unknown): x is TransformStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n\n return x instanceof TransformStream;\n}\n\n// This is a no-op if both sides are already errored.\nfunction TransformStreamError(stream: TransformStream, e: any) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n}\n\nfunction TransformStreamErrorWritableAndUnblockWrite(stream: TransformStream, e: any) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n}\n\nfunction TransformStreamUnblockWrite(stream: TransformStream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. 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This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate(): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n\n TransformStreamDefaultControllerTerminate(this);\n }\n}\n\nObject.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(TransformStreamDefaultController.prototype.error, 'error');\nsetFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n}\n\n// Transform Stream Default Controller Abstract Operations\n\nfunction IsTransformStreamDefaultController(x: any): x is TransformStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n\n return x instanceof TransformStreamDefaultController;\n}\n\nfunction SetUpTransformStreamDefaultController(stream: TransformStream,\n controller: TransformStreamDefaultController,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise) {\n assert(IsTransformStream(stream));\n assert(stream._transformStreamController === undefined);\n\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nfunction SetUpTransformStreamDefaultControllerFromTransformer(stream: TransformStream,\n transformer: ValidatedTransformer) {\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n let transformAlgorithm: (chunk: I) => Promise;\n let flushAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform!(chunk, controller);\n } else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk as unknown as O);\n return promiseResolvedWith(undefined);\n } catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush!(controller);\n } else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n}\n\nfunction TransformStreamDefaultControllerClearAlgorithms(controller: TransformStreamDefaultController) {\n controller._transformAlgorithm = undefined!;\n controller._flushAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\nfunction TransformStreamDefaultControllerEnqueue(controller: TransformStreamDefaultController, chunk: O) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n\n // We throttle 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transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n}\n\nfunction TransformStreamDefaultControllerTerminate(controller: TransformStreamDefaultController) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n\n ReadableStreamDefaultControllerClose(readableController);\n\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n}\n\n// TransformStreamDefaultSink Algorithms\n\nfunction TransformStreamDefaultSinkWriteAlgorithm(stream: TransformStream, chunk: I): Promise {\n assert(stream._writable._state === 'writable');\n\n const controller = stream._transformStreamController;\n\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n assert(backpressureChangePromise !== undefined);\n return 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stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// TransformStreamDefaultSource Algorithms\n\nfunction TransformStreamDefaultSourcePullAlgorithm(stream: TransformStream): Promise {\n // Invariant. 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TypeError(\n `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n}\n\nexport function defaultControllerFinishPromiseResolve(controller: TransformStreamDefaultController) {\n if (controller._finishPromise_resolve === undefined) {\n return;\n }\n\n controller._finishPromise_resolve();\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nexport function defaultControllerFinishPromiseReject(controller: TransformStreamDefaultController, reason: any) {\n if (controller._finishPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(controller._finishPromise!);\n controller._finishPromise_reject(reason);\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\n// Helper functions for the TransformStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(\n 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\ No newline at end of file diff --git a/node_modules/web-streams-polyfill/dist/ponyfill.js b/node_modules/web-streams-polyfill/dist/ponyfill.js new file mode 100644 index 00000000..69fd00dd --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/ponyfill.js @@ -0,0 +1,4983 @@ +/** + * @license + * web-streams-polyfill v3.3.3 + * Copyright 2024 Mattias Buelens, Diwank Singh Tomer and other contributors. + * This code is released under the MIT license. + * SPDX-License-Identifier: MIT + */ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : + typeof define === 'function' && define.amd ? define(['exports'], factory) : + (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.WebStreamsPolyfill = {})); +})(this, (function (exports) { 'use strict'; + + /// + var SymbolPolyfill = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? + Symbol : + function (description) { return "Symbol(".concat(description, ")"); }; + + /****************************************************************************** + Copyright (c) Microsoft Corporation. + + Permission to use, copy, modify, and/or distribute this software for any + purpose with or without fee is hereby granted. + + THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH + REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, + INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR + OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + PERFORMANCE OF THIS SOFTWARE. + ***************************************************************************** */ + /* global Reflect, Promise, SuppressedError, Symbol */ + + + function __generator(thisArg, body) { + var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g; + return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g; + function verb(n) { return function (v) { return step([n, v]); }; } + function step(op) { + if (f) throw new TypeError("Generator is already executing."); + while (g && (g = 0, op[0] && (_ = 0)), _) try { + if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t; + if (y = 0, t) op = [op[0] & 2, t.value]; + switch (op[0]) { + case 0: case 1: t = op; break; + case 4: _.label++; return { value: op[1], done: false }; + case 5: _.label++; y = op[1]; op = [0]; continue; + case 7: op = _.ops.pop(); _.trys.pop(); continue; + default: + if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; } + if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; } + if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; } + if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; } + if (t[2]) _.ops.pop(); + _.trys.pop(); continue; + } + op = body.call(thisArg, _); + } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; } + if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true }; + } + } + + function __values(o) { + var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0; + if (m) return m.call(o); + if (o && typeof o.length === "number") return { + next: function () { + if (o && i >= o.length) o = void 0; + return { value: o && o[i++], done: !o }; + } + }; + throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined."); + } + + function __await(v) { + return this instanceof __await ? (this.v = v, this) : new __await(v); + } + + function __asyncGenerator(thisArg, _arguments, generator) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var g = generator.apply(thisArg, _arguments || []), i, q = []; + return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i; + function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; } + function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } } + function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); } + function fulfill(value) { resume("next", value); } + function reject(value) { resume("throw", value); } + function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); } + } + + function __asyncDelegator(o) { + var i, p; + return i = {}, verb("next"), verb("throw", function (e) { throw e; }), verb("return"), i[Symbol.iterator] = function () { return this; }, i; + function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; } + } + + function __asyncValues(o) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var m = o[Symbol.asyncIterator], i; + return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i); + function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; } + function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); } + } + + typeof SuppressedError === "function" ? SuppressedError : function (error, suppressed, message) { + var e = new Error(message); + return e.name = "SuppressedError", e.error = error, e.suppressed = suppressed, e; + }; + + function noop() { + return undefined; + } + + function typeIsObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; + } + var rethrowAssertionErrorRejection = noop; + function setFunctionName(fn, name) { + try { + Object.defineProperty(fn, 'name', { + value: name, + configurable: true + }); + } + catch (_a) { + // This property is non-configurable in older browsers, so ignore if this throws. + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility + } + } + + var originalPromise = Promise; + var originalPromiseThen = Promise.prototype.then; + var originalPromiseReject = Promise.reject.bind(originalPromise); + // https://webidl.spec.whatwg.org/#a-new-promise + function newPromise(executor) { + return new originalPromise(executor); + } + // https://webidl.spec.whatwg.org/#a-promise-resolved-with + function promiseResolvedWith(value) { + return newPromise(function (resolve) { return resolve(value); }); + } + // https://webidl.spec.whatwg.org/#a-promise-rejected-with + function promiseRejectedWith(reason) { + return originalPromiseReject(reason); + } + function PerformPromiseThen(promise, onFulfilled, onRejected) { + // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an + // approximation. + return originalPromiseThen.call(promise, onFulfilled, onRejected); + } + // Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned + // from that handler. To prevent this, return null instead of void from all handlers. + // http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it + function uponPromise(promise, onFulfilled, onRejected) { + PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection); + } + function uponFulfillment(promise, onFulfilled) { + uponPromise(promise, onFulfilled); + } + function uponRejection(promise, onRejected) { + uponPromise(promise, undefined, onRejected); + } + function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) { + return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler); + } + function setPromiseIsHandledToTrue(promise) { + PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection); + } + var _queueMicrotask = function (callback) { + if (typeof queueMicrotask === 'function') { + _queueMicrotask = queueMicrotask; + } + else { + var resolvedPromise_1 = promiseResolvedWith(undefined); + _queueMicrotask = function (cb) { return PerformPromiseThen(resolvedPromise_1, cb); }; + } + return _queueMicrotask(callback); + }; + function reflectCall(F, V, args) { + if (typeof F !== 'function') { + throw new TypeError('Argument is not a function'); + } + return Function.prototype.apply.call(F, V, args); + } + function promiseCall(F, V, args) { + try { + return promiseResolvedWith(reflectCall(F, V, args)); + } + catch (value) { + return promiseRejectedWith(value); + } + } + + // Original from Chromium + // https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js + var QUEUE_MAX_ARRAY_SIZE = 16384; + /** + * Simple queue structure. + * + * Avoids scalability issues with using a packed array directly by using + * multiple arrays in a linked list and keeping the array size bounded. + */ + var SimpleQueue = /** @class */ (function () { + function SimpleQueue() { + this._cursor = 0; + this._size = 0; + // _front and _back are always defined. + this._front = { + _elements: [], + _next: undefined + }; + this._back = this._front; + // The cursor is used to avoid calling Array.shift(). + // It contains the index of the front element of the array inside the + // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE). + this._cursor = 0; + // When there is only one node, size === elements.length - cursor. + this._size = 0; + } + Object.defineProperty(SimpleQueue.prototype, "length", { + get: function () { + return this._size; + }, + enumerable: false, + configurable: true + }); + // For exception safety, this method is structured in order: + // 1. Read state + // 2. Calculate required state mutations + // 3. Perform state mutations + SimpleQueue.prototype.push = function (element) { + var oldBack = this._back; + var newBack = oldBack; + if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) { + newBack = { + _elements: [], + _next: undefined + }; + } + // push() is the mutation most likely to throw an exception, so it + // goes first. + oldBack._elements.push(element); + if (newBack !== oldBack) { + this._back = newBack; + oldBack._next = newBack; + } + ++this._size; + }; + // Like push(), shift() follows the read -> calculate -> mutate pattern for + // exception safety. + SimpleQueue.prototype.shift = function () { // must not be called on an empty queue + var oldFront = this._front; + var newFront = oldFront; + var oldCursor = this._cursor; + var newCursor = oldCursor + 1; + var elements = oldFront._elements; + var element = elements[oldCursor]; + if (newCursor === QUEUE_MAX_ARRAY_SIZE) { + newFront = oldFront._next; + newCursor = 0; + } + // No mutations before this point. + --this._size; + this._cursor = newCursor; + if (oldFront !== newFront) { + this._front = newFront; + } + // Permit shifted element to be garbage collected. + elements[oldCursor] = undefined; + return element; + }; + // The tricky thing about forEach() is that it can be called + // re-entrantly. The queue may be mutated inside the callback. It is easy to + // see that push() within the callback has no negative effects since the end + // of the queue is checked for on every iteration. If shift() is called + // repeatedly within the callback then the next iteration may return an + // element that has been removed. In this case the callback will be called + // with undefined values until we either "catch up" with elements that still + // exist or reach the back of the queue. + SimpleQueue.prototype.forEach = function (callback) { + var i = this._cursor; + var node = this._front; + var elements = node._elements; + while (i !== elements.length || node._next !== undefined) { + if (i === elements.length) { + node = node._next; + elements = node._elements; + i = 0; + if (elements.length === 0) { + break; + } + } + callback(elements[i]); + ++i; + } + }; + // Return the element that would be returned if shift() was called now, + // without modifying the queue. + SimpleQueue.prototype.peek = function () { // must not be called on an empty queue + var front = this._front; + var cursor = this._cursor; + return front._elements[cursor]; + }; + return SimpleQueue; + }()); + + var AbortSteps = SymbolPolyfill('[[AbortSteps]]'); + var ErrorSteps = SymbolPolyfill('[[ErrorSteps]]'); + var CancelSteps = SymbolPolyfill('[[CancelSteps]]'); + var PullSteps = SymbolPolyfill('[[PullSteps]]'); + var ReleaseSteps = SymbolPolyfill('[[ReleaseSteps]]'); + + function ReadableStreamReaderGenericInitialize(reader, stream) { + reader._ownerReadableStream = stream; + stream._reader = reader; + if (stream._state === 'readable') { + defaultReaderClosedPromiseInitialize(reader); + } + else if (stream._state === 'closed') { + defaultReaderClosedPromiseInitializeAsResolved(reader); + } + else { + defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError); + } + } + // A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state + // check. + function ReadableStreamReaderGenericCancel(reader, reason) { + var stream = reader._ownerReadableStream; + return ReadableStreamCancel(stream, reason); + } + function ReadableStreamReaderGenericRelease(reader) { + var stream = reader._ownerReadableStream; + if (stream._state === 'readable') { + defaultReaderClosedPromiseReject(reader, new TypeError("Reader was released and can no longer be used to monitor the stream's closedness")); + } + else { + defaultReaderClosedPromiseResetToRejected(reader, new TypeError("Reader was released and can no longer be used to monitor the stream's closedness")); + } + stream._readableStreamController[ReleaseSteps](); + stream._reader = undefined; + reader._ownerReadableStream = undefined; + } + // Helper functions for the readers. + function readerLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released reader'); + } + // Helper functions for the ReadableStreamDefaultReader. + function defaultReaderClosedPromiseInitialize(reader) { + reader._closedPromise = newPromise(function (resolve, reject) { + reader._closedPromise_resolve = resolve; + reader._closedPromise_reject = reject; + }); + } + function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseReject(reader, reason); + } + function defaultReaderClosedPromiseInitializeAsResolved(reader) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseResolve(reader); + } + function defaultReaderClosedPromiseReject(reader, reason) { + if (reader._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(reader._closedPromise); + reader._closedPromise_reject(reason); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; + } + function defaultReaderClosedPromiseResetToRejected(reader, reason) { + defaultReaderClosedPromiseInitializeAsRejected(reader, reason); + } + function defaultReaderClosedPromiseResolve(reader) { + if (reader._closedPromise_resolve === undefined) { + return; + } + reader._closedPromise_resolve(undefined); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; + } + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill + var NumberIsFinite = Number.isFinite || function (x) { + return typeof x === 'number' && isFinite(x); + }; + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill + var MathTrunc = Math.trunc || function (v) { + return v < 0 ? Math.ceil(v) : Math.floor(v); + }; + + // https://heycam.github.io/webidl/#idl-dictionaries + function isDictionary(x) { + return typeof x === 'object' || typeof x === 'function'; + } + function assertDictionary(obj, context) { + if (obj !== undefined && !isDictionary(obj)) { + throw new TypeError("".concat(context, " is not an object.")); + } + } + // https://heycam.github.io/webidl/#idl-callback-functions + function assertFunction(x, context) { + if (typeof x !== 'function') { + throw new TypeError("".concat(context, " is not a function.")); + } + } + // https://heycam.github.io/webidl/#idl-object + function isObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; + } + function assertObject(x, context) { + if (!isObject(x)) { + throw new TypeError("".concat(context, " is not an object.")); + } + } + function assertRequiredArgument(x, position, context) { + if (x === undefined) { + throw new TypeError("Parameter ".concat(position, " is required in '").concat(context, "'.")); + } + } + function assertRequiredField(x, field, context) { + if (x === undefined) { + throw new TypeError("".concat(field, " is required in '").concat(context, "'.")); + } + } + // https://heycam.github.io/webidl/#idl-unrestricted-double + function convertUnrestrictedDouble(value) { + return Number(value); + } + function censorNegativeZero(x) { + return x === 0 ? 0 : x; + } + function integerPart(x) { + return censorNegativeZero(MathTrunc(x)); + } + // https://heycam.github.io/webidl/#idl-unsigned-long-long + function convertUnsignedLongLongWithEnforceRange(value, context) { + var lowerBound = 0; + var upperBound = Number.MAX_SAFE_INTEGER; + var x = Number(value); + x = censorNegativeZero(x); + if (!NumberIsFinite(x)) { + throw new TypeError("".concat(context, " is not a finite number")); + } + x = integerPart(x); + if (x < lowerBound || x > upperBound) { + throw new TypeError("".concat(context, " is outside the accepted range of ").concat(lowerBound, " to ").concat(upperBound, ", inclusive")); + } + if (!NumberIsFinite(x) || x === 0) { + return 0; + } + // TODO Use BigInt if supported? + // let xBigInt = BigInt(integerPart(x)); + // xBigInt = BigInt.asUintN(64, xBigInt); + // return Number(xBigInt); + return x; + } + + function assertReadableStream(x, context) { + if (!IsReadableStream(x)) { + throw new TypeError("".concat(context, " is not a ReadableStream.")); + } + } + + // Abstract operations for the ReadableStream. + function AcquireReadableStreamDefaultReader(stream) { + return new ReadableStreamDefaultReader(stream); + } + // ReadableStream API exposed for controllers. + function ReadableStreamAddReadRequest(stream, readRequest) { + stream._reader._readRequests.push(readRequest); + } + function ReadableStreamFulfillReadRequest(stream, chunk, done) { + var reader = stream._reader; + var readRequest = reader._readRequests.shift(); + if (done) { + readRequest._closeSteps(); + } + else { + readRequest._chunkSteps(chunk); + } + } + function ReadableStreamGetNumReadRequests(stream) { + return stream._reader._readRequests.length; + } + function ReadableStreamHasDefaultReader(stream) { + var reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamDefaultReader(reader)) { + return false; + } + return true; + } + /** + * A default reader vended by a {@link ReadableStream}. + * + * @public + */ + var ReadableStreamDefaultReader = /** @class */ (function () { + function ReadableStreamDefaultReader(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readRequests = new SimpleQueue(); + } + Object.defineProperty(ReadableStreamDefaultReader.prototype, "closed", { + /** + * Returns a promise that will be fulfilled when the stream becomes closed, + * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing. + */ + get: function () { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('closed')); + } + return this._closedPromise; + }, + enumerable: false, + configurable: true + }); + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + ReadableStreamDefaultReader.prototype.cancel = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + }; + /** + * Returns a promise that allows access to the next chunk from the stream's internal queue, if available. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + ReadableStreamDefaultReader.prototype.read = function () { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('read')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + var resolvePromise; + var rejectPromise; + var promise = newPromise(function (resolve, reject) { + resolvePromise = resolve; + rejectPromise = reject; + }); + var readRequest = { + _chunkSteps: function (chunk) { return resolvePromise({ value: chunk, done: false }); }, + _closeSteps: function () { return resolvePromise({ value: undefined, done: true }); }, + _errorSteps: function (e) { return rejectPromise(e); } + }; + ReadableStreamDefaultReaderRead(this, readRequest); + return promise; + }; + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + ReadableStreamDefaultReader.prototype.releaseLock = function () { + if (!IsReadableStreamDefaultReader(this)) { + throw defaultReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamDefaultReaderRelease(this); + }; + return ReadableStreamDefaultReader; + }()); + Object.defineProperties(ReadableStreamDefaultReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } + }); + setFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel'); + setFunctionName(ReadableStreamDefaultReader.prototype.read, 'read'); + setFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultReader.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamDefaultReader', + configurable: true + }); + } + // Abstract operations for the readers. + function IsReadableStreamDefaultReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) { + return false; + } + return x instanceof ReadableStreamDefaultReader; + } + function ReadableStreamDefaultReaderRead(reader, readRequest) { + var stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'closed') { + readRequest._closeSteps(); + } + else if (stream._state === 'errored') { + readRequest._errorSteps(stream._storedError); + } + else { + stream._readableStreamController[PullSteps](readRequest); + } + } + function ReadableStreamDefaultReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + var e = new TypeError('Reader was released'); + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + function ReadableStreamDefaultReaderErrorReadRequests(reader, e) { + var readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(function (readRequest) { + readRequest._errorSteps(e); + }); + } + // Helper functions for the ReadableStreamDefaultReader. + function defaultReaderBrandCheckException(name) { + return new TypeError("ReadableStreamDefaultReader.prototype.".concat(name, " can only be used on a ReadableStreamDefaultReader")); + } + + var _a$1, _b, _c; + function CreateArrayFromList(elements) { + // We use arrays to represent lists, so this is basically a no-op. + // Do a slice though just in case we happen to depend on the unique-ness. + return elements.slice(); + } + function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) { + new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset); + } + var TransferArrayBuffer = function (O) { + if (typeof O.transfer === 'function') { + TransferArrayBuffer = function (buffer) { return buffer.transfer(); }; + } + else if (typeof structuredClone === 'function') { + TransferArrayBuffer = function (buffer) { return structuredClone(buffer, { transfer: [buffer] }); }; + } + else { + // Not implemented correctly + TransferArrayBuffer = function (buffer) { return buffer; }; + } + return TransferArrayBuffer(O); + }; + var IsDetachedBuffer = function (O) { + if (typeof O.detached === 'boolean') { + IsDetachedBuffer = function (buffer) { return buffer.detached; }; + } + else { + // Not implemented correctly + IsDetachedBuffer = function (buffer) { return buffer.byteLength === 0; }; + } + return IsDetachedBuffer(O); + }; + function ArrayBufferSlice(buffer, begin, end) { + // ArrayBuffer.prototype.slice is not available on IE10 + // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice + if (buffer.slice) { + return buffer.slice(begin, end); + } + var length = end - begin; + var slice = new ArrayBuffer(length); + CopyDataBlockBytes(slice, 0, buffer, begin, length); + return slice; + } + function GetMethod(receiver, prop) { + var func = receiver[prop]; + if (func === undefined || func === null) { + return undefined; + } + if (typeof func !== 'function') { + throw new TypeError("".concat(String(prop), " is not a function")); + } + return func; + } + function CreateAsyncFromSyncIterator(syncIteratorRecord) { + // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%, + // we use yield* inside an async generator function to achieve the same result. + var _a; + // Wrap the sync iterator inside a sync iterable, so we can use it with yield*. + var syncIterable = (_a = {}, + _a[SymbolPolyfill.iterator] = function () { return syncIteratorRecord.iterator; }, + _a); + // Create an async generator function and immediately invoke it. + var asyncIterator = (function () { + return __asyncGenerator(this, arguments, function () { + return __generator(this, function (_a) { + switch (_a.label) { + case 0: return [5 /*yield**/, __values(__asyncDelegator(__asyncValues(syncIterable)))]; + case 1: return [4 /*yield*/, __await.apply(void 0, [_a.sent()])]; + case 2: return [4 /*yield*/, __await.apply(void 0, [_a.sent()])]; + case 3: return [2 /*return*/, _a.sent()]; + } + }); + }); + }()); + // Return as an async iterator record. + var nextMethod = asyncIterator.next; + return { iterator: asyncIterator, nextMethod: nextMethod, done: false }; + } + // Aligns with core-js/modules/es.symbol.async-iterator.js + var SymbolAsyncIterator = (_c = (_a$1 = SymbolPolyfill.asyncIterator) !== null && _a$1 !== void 0 ? _a$1 : (_b = SymbolPolyfill.for) === null || _b === void 0 ? void 0 : _b.call(SymbolPolyfill, 'Symbol.asyncIterator')) !== null && _c !== void 0 ? _c : '@@asyncIterator'; + function GetIterator(obj, hint, method) { + if (hint === void 0) { hint = 'sync'; } + if (method === undefined) { + if (hint === 'async') { + method = GetMethod(obj, SymbolAsyncIterator); + if (method === undefined) { + var syncMethod = GetMethod(obj, SymbolPolyfill.iterator); + var syncIteratorRecord = GetIterator(obj, 'sync', syncMethod); + return CreateAsyncFromSyncIterator(syncIteratorRecord); + } + } + else { + method = GetMethod(obj, SymbolPolyfill.iterator); + } + } + if (method === undefined) { + throw new TypeError('The object is not iterable'); + } + var iterator = reflectCall(method, obj, []); + if (!typeIsObject(iterator)) { + throw new TypeError('The iterator method must return an object'); + } + var nextMethod = iterator.next; + return { iterator: iterator, nextMethod: nextMethod, done: false }; + } + function IteratorNext(iteratorRecord) { + var result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []); + if (!typeIsObject(result)) { + throw new TypeError('The iterator.next() method must return an object'); + } + return result; + } + function IteratorComplete(iterResult) { + return Boolean(iterResult.done); + } + function IteratorValue(iterResult) { + return iterResult.value; + } + + /// + var _a; + // We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it. + var AsyncIteratorPrototype = (_a = {}, + // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( ) + // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator + _a[SymbolAsyncIterator] = function () { + return this; + }, + _a); + Object.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false }); + + /// + var ReadableStreamAsyncIteratorImpl = /** @class */ (function () { + function ReadableStreamAsyncIteratorImpl(reader, preventCancel) { + this._ongoingPromise = undefined; + this._isFinished = false; + this._reader = reader; + this._preventCancel = preventCancel; + } + ReadableStreamAsyncIteratorImpl.prototype.next = function () { + var _this = this; + var nextSteps = function () { return _this._nextSteps(); }; + this._ongoingPromise = this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) : + nextSteps(); + return this._ongoingPromise; + }; + ReadableStreamAsyncIteratorImpl.prototype.return = function (value) { + var _this = this; + var returnSteps = function () { return _this._returnSteps(value); }; + return this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) : + returnSteps(); + }; + ReadableStreamAsyncIteratorImpl.prototype._nextSteps = function () { + var _this = this; + if (this._isFinished) { + return Promise.resolve({ value: undefined, done: true }); + } + var reader = this._reader; + var resolvePromise; + var rejectPromise; + var promise = newPromise(function (resolve, reject) { + resolvePromise = resolve; + rejectPromise = reject; + }); + var readRequest = { + _chunkSteps: function (chunk) { + _this._ongoingPromise = undefined; + // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test. + // FIXME Is this a bug in the specification, or in the test? + _queueMicrotask(function () { return resolvePromise({ value: chunk, done: false }); }); + }, + _closeSteps: function () { + _this._ongoingPromise = undefined; + _this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + resolvePromise({ value: undefined, done: true }); + }, + _errorSteps: function (reason) { + _this._ongoingPromise = undefined; + _this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + rejectPromise(reason); + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promise; + }; + ReadableStreamAsyncIteratorImpl.prototype._returnSteps = function (value) { + if (this._isFinished) { + return Promise.resolve({ value: value, done: true }); + } + this._isFinished = true; + var reader = this._reader; + if (!this._preventCancel) { + var result = ReadableStreamReaderGenericCancel(reader, value); + ReadableStreamReaderGenericRelease(reader); + return transformPromiseWith(result, function () { return ({ value: value, done: true }); }); + } + ReadableStreamReaderGenericRelease(reader); + return promiseResolvedWith({ value: value, done: true }); + }; + return ReadableStreamAsyncIteratorImpl; + }()); + var ReadableStreamAsyncIteratorPrototype = { + next: function () { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next')); + } + return this._asyncIteratorImpl.next(); + }, + return: function (value) { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return')); + } + return this._asyncIteratorImpl.return(value); + } + }; + Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype); + // Abstract operations for the ReadableStream. + function AcquireReadableStreamAsyncIterator(stream, preventCancel) { + var reader = AcquireReadableStreamDefaultReader(stream); + var impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel); + var iterator = Object.create(ReadableStreamAsyncIteratorPrototype); + iterator._asyncIteratorImpl = impl; + return iterator; + } + function IsReadableStreamAsyncIterator(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) { + return false; + } + try { + // noinspection SuspiciousTypeOfGuard + return x._asyncIteratorImpl instanceof + ReadableStreamAsyncIteratorImpl; + } + catch (_a) { + return false; + } + } + // Helper functions for the ReadableStream. + function streamAsyncIteratorBrandCheckException(name) { + return new TypeError("ReadableStreamAsyncIterator.".concat(name, " can only be used on a ReadableSteamAsyncIterator")); + } + + /// + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill + var NumberIsNaN = Number.isNaN || function (x) { + // eslint-disable-next-line no-self-compare + return x !== x; + }; + + function IsNonNegativeNumber(v) { + if (typeof v !== 'number') { + return false; + } + if (NumberIsNaN(v)) { + return false; + } + if (v < 0) { + return false; + } + return true; + } + function CloneAsUint8Array(O) { + var buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength); + return new Uint8Array(buffer); + } + + function DequeueValue(container) { + var pair = container._queue.shift(); + container._queueTotalSize -= pair.size; + if (container._queueTotalSize < 0) { + container._queueTotalSize = 0; + } + return pair.value; + } + function EnqueueValueWithSize(container, value, size) { + if (!IsNonNegativeNumber(size) || size === Infinity) { + throw new RangeError('Size must be a finite, non-NaN, non-negative number.'); + } + container._queue.push({ value: value, size: size }); + container._queueTotalSize += size; + } + function PeekQueueValue(container) { + var pair = container._queue.peek(); + return pair.value; + } + function ResetQueue(container) { + container._queue = new SimpleQueue(); + container._queueTotalSize = 0; + } + + function isDataViewConstructor(ctor) { + return ctor === DataView; + } + function isDataView(view) { + return isDataViewConstructor(view.constructor); + } + function arrayBufferViewElementSize(ctor) { + if (isDataViewConstructor(ctor)) { + return 1; + } + return ctor.BYTES_PER_ELEMENT; + } + + /** + * A pull-into request in a {@link ReadableByteStreamController}. + * + * @public + */ + var ReadableStreamBYOBRequest = /** @class */ (function () { + function ReadableStreamBYOBRequest() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(ReadableStreamBYOBRequest.prototype, "view", { + /** + * Returns the view for writing in to, or `null` if the BYOB request has already been responded to. + */ + get: function () { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('view'); + } + return this._view; + }, + enumerable: false, + configurable: true + }); + ReadableStreamBYOBRequest.prototype.respond = function (bytesWritten) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respond'); + } + assertRequiredArgument(bytesWritten, 1, 'respond'); + bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter'); + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(this._view.buffer)) { + throw new TypeError("The BYOB request's buffer has been detached and so cannot be used as a response"); + } + ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten); + }; + ReadableStreamBYOBRequest.prototype.respondWithNewView = function (view) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respondWithNewView'); + } + assertRequiredArgument(view, 1, 'respondWithNewView'); + if (!ArrayBuffer.isView(view)) { + throw new TypeError('You can only respond with array buffer views'); + } + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(view.buffer)) { + throw new TypeError('The given view\'s buffer has been detached and so cannot be used as a response'); + } + ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view); + }; + return ReadableStreamBYOBRequest; + }()); + Object.defineProperties(ReadableStreamBYOBRequest.prototype, { + respond: { enumerable: true }, + respondWithNewView: { enumerable: true }, + view: { enumerable: true } + }); + setFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond'); + setFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBRequest.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamBYOBRequest', + configurable: true + }); + } + /** + * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue. + * + * @public + */ + var ReadableByteStreamController = /** @class */ (function () { + function ReadableByteStreamController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(ReadableByteStreamController.prototype, "byobRequest", { + /** + * Returns the current BYOB pull request, or `null` if there isn't one. + */ + get: function () { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('byobRequest'); + } + return ReadableByteStreamControllerGetBYOBRequest(this); + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(ReadableByteStreamController.prototype, "desiredSize", { + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure. + */ + get: function () { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('desiredSize'); + } + return ReadableByteStreamControllerGetDesiredSize(this); + }, + enumerable: false, + configurable: true + }); + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + ReadableByteStreamController.prototype.close = function () { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('close'); + } + if (this._closeRequested) { + throw new TypeError('The stream has already been closed; do not close it again!'); + } + var state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError("The stream (in ".concat(state, " state) is not in the readable state and cannot be closed")); + } + ReadableByteStreamControllerClose(this); + }; + ReadableByteStreamController.prototype.enqueue = function (chunk) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('enqueue'); + } + assertRequiredArgument(chunk, 1, 'enqueue'); + if (!ArrayBuffer.isView(chunk)) { + throw new TypeError('chunk must be an array buffer view'); + } + if (chunk.byteLength === 0) { + throw new TypeError('chunk must have non-zero byteLength'); + } + if (chunk.buffer.byteLength === 0) { + throw new TypeError("chunk's buffer must have non-zero byteLength"); + } + if (this._closeRequested) { + throw new TypeError('stream is closed or draining'); + } + var state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError("The stream (in ".concat(state, " state) is not in the readable state and cannot be enqueued to")); + } + ReadableByteStreamControllerEnqueue(this, chunk); + }; + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + ReadableByteStreamController.prototype.error = function (e) { + if (e === void 0) { e = undefined; } + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('error'); + } + ReadableByteStreamControllerError(this, e); + }; + /** @internal */ + ReadableByteStreamController.prototype[CancelSteps] = function (reason) { + ReadableByteStreamControllerClearPendingPullIntos(this); + ResetQueue(this); + var result = this._cancelAlgorithm(reason); + ReadableByteStreamControllerClearAlgorithms(this); + return result; + }; + /** @internal */ + ReadableByteStreamController.prototype[PullSteps] = function (readRequest) { + var stream = this._controlledReadableByteStream; + if (this._queueTotalSize > 0) { + ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest); + return; + } + var autoAllocateChunkSize = this._autoAllocateChunkSize; + if (autoAllocateChunkSize !== undefined) { + var buffer = void 0; + try { + buffer = new ArrayBuffer(autoAllocateChunkSize); + } + catch (bufferE) { + readRequest._errorSteps(bufferE); + return; + } + var pullIntoDescriptor = { + buffer: buffer, + bufferByteLength: autoAllocateChunkSize, + byteOffset: 0, + byteLength: autoAllocateChunkSize, + bytesFilled: 0, + minimumFill: 1, + elementSize: 1, + viewConstructor: Uint8Array, + readerType: 'default' + }; + this._pendingPullIntos.push(pullIntoDescriptor); + } + ReadableStreamAddReadRequest(stream, readRequest); + ReadableByteStreamControllerCallPullIfNeeded(this); + }; + /** @internal */ + ReadableByteStreamController.prototype[ReleaseSteps] = function () { + if (this._pendingPullIntos.length > 0) { + var firstPullInto = this._pendingPullIntos.peek(); + firstPullInto.readerType = 'none'; + this._pendingPullIntos = new SimpleQueue(); + this._pendingPullIntos.push(firstPullInto); + } + }; + return ReadableByteStreamController; + }()); + Object.defineProperties(ReadableByteStreamController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + byobRequest: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(ReadableByteStreamController.prototype.close, 'close'); + setFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue'); + setFunctionName(ReadableByteStreamController.prototype.error, 'error'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableByteStreamController.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableByteStreamController', + configurable: true + }); + } + // Abstract operations for the ReadableByteStreamController. + function IsReadableByteStreamController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) { + return false; + } + return x instanceof ReadableByteStreamController; + } + function IsReadableStreamBYOBRequest(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) { + return false; + } + return x instanceof ReadableStreamBYOBRequest; + } + function ReadableByteStreamControllerCallPullIfNeeded(controller) { + var shouldPull = ReadableByteStreamControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + // TODO: Test controller argument + var pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, function () { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + return null; + }, function (e) { + ReadableByteStreamControllerError(controller, e); + return null; + }); + } + function ReadableByteStreamControllerClearPendingPullIntos(controller) { + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + controller._pendingPullIntos = new SimpleQueue(); + } + function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) { + var done = false; + if (stream._state === 'closed') { + done = true; + } + var filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'default') { + ReadableStreamFulfillReadRequest(stream, filledView, done); + } + else { + ReadableStreamFulfillReadIntoRequest(stream, filledView, done); + } + } + function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) { + var bytesFilled = pullIntoDescriptor.bytesFilled; + var elementSize = pullIntoDescriptor.elementSize; + return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize); + } + function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) { + controller._queue.push({ buffer: buffer, byteOffset: byteOffset, byteLength: byteLength }); + controller._queueTotalSize += byteLength; + } + function ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, buffer, byteOffset, byteLength) { + var clonedChunk; + try { + clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength); + } + catch (cloneE) { + ReadableByteStreamControllerError(controller, cloneE); + throw cloneE; + } + ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength); + } + function ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstDescriptor) { + if (firstDescriptor.bytesFilled > 0) { + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, firstDescriptor.buffer, firstDescriptor.byteOffset, firstDescriptor.bytesFilled); + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) { + var maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled); + var maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy; + var totalBytesToCopyRemaining = maxBytesToCopy; + var ready = false; + var remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize; + var maxAlignedBytes = maxBytesFilled - remainderBytes; + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) { + totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled; + ready = true; + } + var queue = controller._queue; + while (totalBytesToCopyRemaining > 0) { + var headOfQueue = queue.peek(); + var bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength); + var destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy); + if (headOfQueue.byteLength === bytesToCopy) { + queue.shift(); + } + else { + headOfQueue.byteOffset += bytesToCopy; + headOfQueue.byteLength -= bytesToCopy; + } + controller._queueTotalSize -= bytesToCopy; + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor); + totalBytesToCopyRemaining -= bytesToCopy; + } + return ready; + } + function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) { + pullIntoDescriptor.bytesFilled += size; + } + function ReadableByteStreamControllerHandleQueueDrain(controller) { + if (controller._queueTotalSize === 0 && controller._closeRequested) { + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(controller._controlledReadableByteStream); + } + else { + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + } + function ReadableByteStreamControllerInvalidateBYOBRequest(controller) { + if (controller._byobRequest === null) { + return; + } + controller._byobRequest._associatedReadableByteStreamController = undefined; + controller._byobRequest._view = null; + controller._byobRequest = null; + } + function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) { + while (controller._pendingPullIntos.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + var pullIntoDescriptor = controller._pendingPullIntos.peek(); + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + } + } + } + function ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller) { + var reader = controller._controlledReadableByteStream._reader; + while (reader._readRequests.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + var readRequest = reader._readRequests.shift(); + ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest); + } + } + function ReadableByteStreamControllerPullInto(controller, view, min, readIntoRequest) { + var stream = controller._controlledReadableByteStream; + var ctor = view.constructor; + var elementSize = arrayBufferViewElementSize(ctor); + var byteOffset = view.byteOffset, byteLength = view.byteLength; + var minimumFill = min * elementSize; + var buffer; + try { + buffer = TransferArrayBuffer(view.buffer); + } + catch (e) { + readIntoRequest._errorSteps(e); + return; + } + var pullIntoDescriptor = { + buffer: buffer, + bufferByteLength: buffer.byteLength, + byteOffset: byteOffset, + byteLength: byteLength, + bytesFilled: 0, + minimumFill: minimumFill, + elementSize: elementSize, + viewConstructor: ctor, + readerType: 'byob' + }; + if (controller._pendingPullIntos.length > 0) { + controller._pendingPullIntos.push(pullIntoDescriptor); + // No ReadableByteStreamControllerCallPullIfNeeded() call since: + // - No change happens on desiredSize + // - The source has already been notified of that there's at least 1 pending read(view) + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + return; + } + if (stream._state === 'closed') { + var emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0); + readIntoRequest._closeSteps(emptyView); + return; + } + if (controller._queueTotalSize > 0) { + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + var filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + ReadableByteStreamControllerHandleQueueDrain(controller); + readIntoRequest._chunkSteps(filledView); + return; + } + if (controller._closeRequested) { + var e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + readIntoRequest._errorSteps(e); + return; + } + } + controller._pendingPullIntos.push(pullIntoDescriptor); + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) { + if (firstDescriptor.readerType === 'none') { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + var stream = controller._controlledReadableByteStream; + if (ReadableStreamHasBYOBReader(stream)) { + while (ReadableStreamGetNumReadIntoRequests(stream) > 0) { + var pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor); + } + } + } + function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) { + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + return; + } + if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) { + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + return; + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + var remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize; + if (remainderSize > 0) { + var end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, pullIntoDescriptor.buffer, end - remainderSize, remainderSize); + } + pullIntoDescriptor.bytesFilled -= remainderSize; + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) { + var firstDescriptor = controller._pendingPullIntos.peek(); + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + var state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor); + } + else { + ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerShiftPendingPullInto(controller) { + var descriptor = controller._pendingPullIntos.shift(); + return descriptor; + } + function ReadableByteStreamControllerShouldCallPull(controller) { + var stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return false; + } + if (controller._closeRequested) { + return false; + } + if (!controller._started) { + return false; + } + if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) { + return true; + } + var desiredSize = ReadableByteStreamControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; + } + function ReadableByteStreamControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + } + // A client of ReadableByteStreamController may use these functions directly to bypass state check. + function ReadableByteStreamControllerClose(controller) { + var stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + if (controller._queueTotalSize > 0) { + controller._closeRequested = true; + return; + } + if (controller._pendingPullIntos.length > 0) { + var firstPendingPullInto = controller._pendingPullIntos.peek(); + if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) { + var e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + throw e; + } + } + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } + function ReadableByteStreamControllerEnqueue(controller, chunk) { + var stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + var buffer = chunk.buffer, byteOffset = chunk.byteOffset, byteLength = chunk.byteLength; + if (IsDetachedBuffer(buffer)) { + throw new TypeError('chunk\'s buffer is detached and so cannot be enqueued'); + } + var transferredBuffer = TransferArrayBuffer(buffer); + if (controller._pendingPullIntos.length > 0) { + var firstPendingPullInto = controller._pendingPullIntos.peek(); + if (IsDetachedBuffer(firstPendingPullInto.buffer)) { + throw new TypeError('The BYOB request\'s buffer has been detached and so cannot be filled with an enqueued chunk'); + } + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer); + if (firstPendingPullInto.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto); + } + } + if (ReadableStreamHasDefaultReader(stream)) { + ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller); + if (ReadableStreamGetNumReadRequests(stream) === 0) { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + else { + if (controller._pendingPullIntos.length > 0) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + var transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength); + ReadableStreamFulfillReadRequest(stream, transferredView, false); + } + } + else if (ReadableStreamHasBYOBReader(stream)) { + // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully. + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + else { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + function ReadableByteStreamControllerError(controller, e) { + var stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return; + } + ReadableByteStreamControllerClearPendingPullIntos(controller); + ResetQueue(controller); + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); + } + function ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest) { + var entry = controller._queue.shift(); + controller._queueTotalSize -= entry.byteLength; + ReadableByteStreamControllerHandleQueueDrain(controller); + var view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength); + readRequest._chunkSteps(view); + } + function ReadableByteStreamControllerGetBYOBRequest(controller) { + if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) { + var firstDescriptor = controller._pendingPullIntos.peek(); + var view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled); + var byobRequest = Object.create(ReadableStreamBYOBRequest.prototype); + SetUpReadableStreamBYOBRequest(byobRequest, controller, view); + controller._byobRequest = byobRequest; + } + return controller._byobRequest; + } + function ReadableByteStreamControllerGetDesiredSize(controller) { + var state = controller._controlledReadableByteStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; + } + function ReadableByteStreamControllerRespond(controller, bytesWritten) { + var firstDescriptor = controller._pendingPullIntos.peek(); + var state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (bytesWritten !== 0) { + throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream'); + } + } + else { + if (bytesWritten === 0) { + throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream'); + } + if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) { + throw new RangeError('bytesWritten out of range'); + } + } + firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer); + ReadableByteStreamControllerRespondInternal(controller, bytesWritten); + } + function ReadableByteStreamControllerRespondWithNewView(controller, view) { + var firstDescriptor = controller._pendingPullIntos.peek(); + var state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (view.byteLength !== 0) { + throw new TypeError('The view\'s length must be 0 when calling respondWithNewView() on a closed stream'); + } + } + else { + if (view.byteLength === 0) { + throw new TypeError('The view\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'); + } + } + if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) { + throw new RangeError('The region specified by view does not match byobRequest'); + } + if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) { + throw new RangeError('The buffer of view has different capacity than byobRequest'); + } + if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) { + throw new RangeError('The region specified by view is larger than byobRequest'); + } + var viewByteLength = view.byteLength; + firstDescriptor.buffer = TransferArrayBuffer(view.buffer); + ReadableByteStreamControllerRespondInternal(controller, viewByteLength); + } + function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) { + controller._controlledReadableByteStream = stream; + controller._pullAgain = false; + controller._pulling = false; + controller._byobRequest = null; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._closeRequested = false; + controller._started = false; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._autoAllocateChunkSize = autoAllocateChunkSize; + controller._pendingPullIntos = new SimpleQueue(); + stream._readableStreamController = controller; + var startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), function () { + controller._started = true; + ReadableByteStreamControllerCallPullIfNeeded(controller); + return null; + }, function (r) { + ReadableByteStreamControllerError(controller, r); + return null; + }); + } + function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) { + var controller = Object.create(ReadableByteStreamController.prototype); + var startAlgorithm; + var pullAlgorithm; + var cancelAlgorithm; + if (underlyingByteSource.start !== undefined) { + startAlgorithm = function () { return underlyingByteSource.start(controller); }; + } + else { + startAlgorithm = function () { return undefined; }; + } + if (underlyingByteSource.pull !== undefined) { + pullAlgorithm = function () { return underlyingByteSource.pull(controller); }; + } + else { + pullAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingByteSource.cancel !== undefined) { + cancelAlgorithm = function (reason) { return underlyingByteSource.cancel(reason); }; + } + else { + cancelAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + var autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize; + if (autoAllocateChunkSize === 0) { + throw new TypeError('autoAllocateChunkSize must be greater than 0'); + } + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize); + } + function SetUpReadableStreamBYOBRequest(request, controller, view) { + request._associatedReadableByteStreamController = controller; + request._view = view; + } + // Helper functions for the ReadableStreamBYOBRequest. + function byobRequestBrandCheckException(name) { + return new TypeError("ReadableStreamBYOBRequest.prototype.".concat(name, " can only be used on a ReadableStreamBYOBRequest")); + } + // Helper functions for the ReadableByteStreamController. + function byteStreamControllerBrandCheckException(name) { + return new TypeError("ReadableByteStreamController.prototype.".concat(name, " can only be used on a ReadableByteStreamController")); + } + + function convertReaderOptions(options, context) { + assertDictionary(options, context); + var mode = options === null || options === void 0 ? void 0 : options.mode; + return { + mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, "".concat(context, " has member 'mode' that")) + }; + } + function convertReadableStreamReaderMode(mode, context) { + mode = "".concat(mode); + if (mode !== 'byob') { + throw new TypeError("".concat(context, " '").concat(mode, "' is not a valid enumeration value for ReadableStreamReaderMode")); + } + return mode; + } + function convertByobReadOptions(options, context) { + var _a; + assertDictionary(options, context); + var min = (_a = options === null || options === void 0 ? void 0 : options.min) !== null && _a !== void 0 ? _a : 1; + return { + min: convertUnsignedLongLongWithEnforceRange(min, "".concat(context, " has member 'min' that")) + }; + } + + // Abstract operations for the ReadableStream. + function AcquireReadableStreamBYOBReader(stream) { + return new ReadableStreamBYOBReader(stream); + } + // ReadableStream API exposed for controllers. + function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) { + stream._reader._readIntoRequests.push(readIntoRequest); + } + function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) { + var reader = stream._reader; + var readIntoRequest = reader._readIntoRequests.shift(); + if (done) { + readIntoRequest._closeSteps(chunk); + } + else { + readIntoRequest._chunkSteps(chunk); + } + } + function ReadableStreamGetNumReadIntoRequests(stream) { + return stream._reader._readIntoRequests.length; + } + function ReadableStreamHasBYOBReader(stream) { + var reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamBYOBReader(reader)) { + return false; + } + return true; + } + /** + * A BYOB reader vended by a {@link ReadableStream}. + * + * @public + */ + var ReadableStreamBYOBReader = /** @class */ (function () { + function ReadableStreamBYOBReader(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + if (!IsReadableByteStreamController(stream._readableStreamController)) { + throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' + + 'source'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readIntoRequests = new SimpleQueue(); + } + Object.defineProperty(ReadableStreamBYOBReader.prototype, "closed", { + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the reader's lock is released before the stream finishes closing. + */ + get: function () { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('closed')); + } + return this._closedPromise; + }, + enumerable: false, + configurable: true + }); + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + ReadableStreamBYOBReader.prototype.cancel = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + }; + ReadableStreamBYOBReader.prototype.read = function (view, rawOptions) { + if (rawOptions === void 0) { rawOptions = {}; } + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('read')); + } + if (!ArrayBuffer.isView(view)) { + return promiseRejectedWith(new TypeError('view must be an array buffer view')); + } + if (view.byteLength === 0) { + return promiseRejectedWith(new TypeError('view must have non-zero byteLength')); + } + if (view.buffer.byteLength === 0) { + return promiseRejectedWith(new TypeError("view's buffer must have non-zero byteLength")); + } + if (IsDetachedBuffer(view.buffer)) { + return promiseRejectedWith(new TypeError('view\'s buffer has been detached')); + } + var options; + try { + options = convertByobReadOptions(rawOptions, 'options'); + } + catch (e) { + return promiseRejectedWith(e); + } + var min = options.min; + if (min === 0) { + return promiseRejectedWith(new TypeError('options.min must be greater than 0')); + } + if (!isDataView(view)) { + if (min > view.length) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s length')); + } + } + else if (min > view.byteLength) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s byteLength')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + var resolvePromise; + var rejectPromise; + var promise = newPromise(function (resolve, reject) { + resolvePromise = resolve; + rejectPromise = reject; + }); + var readIntoRequest = { + _chunkSteps: function (chunk) { return resolvePromise({ value: chunk, done: false }); }, + _closeSteps: function (chunk) { return resolvePromise({ value: chunk, done: true }); }, + _errorSteps: function (e) { return rejectPromise(e); } + }; + ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest); + return promise; + }; + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + ReadableStreamBYOBReader.prototype.releaseLock = function () { + if (!IsReadableStreamBYOBReader(this)) { + throw byobReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamBYOBReaderRelease(this); + }; + return ReadableStreamBYOBReader; + }()); + Object.defineProperties(ReadableStreamBYOBReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } + }); + setFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel'); + setFunctionName(ReadableStreamBYOBReader.prototype.read, 'read'); + setFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBReader.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamBYOBReader', + configurable: true + }); + } + // Abstract operations for the readers. + function IsReadableStreamBYOBReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) { + return false; + } + return x instanceof ReadableStreamBYOBReader; + } + function ReadableStreamBYOBReaderRead(reader, view, min, readIntoRequest) { + var stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'errored') { + readIntoRequest._errorSteps(stream._storedError); + } + else { + ReadableByteStreamControllerPullInto(stream._readableStreamController, view, min, readIntoRequest); + } + } + function ReadableStreamBYOBReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + var e = new TypeError('Reader was released'); + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } + function ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e) { + var readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(function (readIntoRequest) { + readIntoRequest._errorSteps(e); + }); + } + // Helper functions for the ReadableStreamBYOBReader. + function byobReaderBrandCheckException(name) { + return new TypeError("ReadableStreamBYOBReader.prototype.".concat(name, " can only be used on a ReadableStreamBYOBReader")); + } + + function ExtractHighWaterMark(strategy, defaultHWM) { + var highWaterMark = strategy.highWaterMark; + if (highWaterMark === undefined) { + return defaultHWM; + } + if (NumberIsNaN(highWaterMark) || highWaterMark < 0) { + throw new RangeError('Invalid highWaterMark'); + } + return highWaterMark; + } + function ExtractSizeAlgorithm(strategy) { + var size = strategy.size; + if (!size) { + return function () { return 1; }; + } + return size; + } + + function convertQueuingStrategy(init, context) { + assertDictionary(init, context); + var highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + var size = init === null || init === void 0 ? void 0 : init.size; + return { + highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark), + size: size === undefined ? undefined : convertQueuingStrategySize(size, "".concat(context, " has member 'size' that")) + }; + } + function convertQueuingStrategySize(fn, context) { + assertFunction(fn, context); + return function (chunk) { return convertUnrestrictedDouble(fn(chunk)); }; + } + + function convertUnderlyingSink(original, context) { + assertDictionary(original, context); + var abort = original === null || original === void 0 ? void 0 : original.abort; + var close = original === null || original === void 0 ? void 0 : original.close; + var start = original === null || original === void 0 ? void 0 : original.start; + var type = original === null || original === void 0 ? void 0 : original.type; + var write = original === null || original === void 0 ? void 0 : original.write; + return { + abort: abort === undefined ? + undefined : + convertUnderlyingSinkAbortCallback(abort, original, "".concat(context, " has member 'abort' that")), + close: close === undefined ? + undefined : + convertUnderlyingSinkCloseCallback(close, original, "".concat(context, " has member 'close' that")), + start: start === undefined ? + undefined : + convertUnderlyingSinkStartCallback(start, original, "".concat(context, " has member 'start' that")), + write: write === undefined ? + undefined : + convertUnderlyingSinkWriteCallback(write, original, "".concat(context, " has member 'write' that")), + type: type + }; + } + function convertUnderlyingSinkAbortCallback(fn, original, context) { + assertFunction(fn, context); + return function (reason) { return promiseCall(fn, original, [reason]); }; + } + function convertUnderlyingSinkCloseCallback(fn, original, context) { + assertFunction(fn, context); + return function () { return promiseCall(fn, original, []); }; + } + function convertUnderlyingSinkStartCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return reflectCall(fn, original, [controller]); }; + } + function convertUnderlyingSinkWriteCallback(fn, original, context) { + assertFunction(fn, context); + return function (chunk, controller) { return promiseCall(fn, original, [chunk, controller]); }; + } + + function assertWritableStream(x, context) { + if (!IsWritableStream(x)) { + throw new TypeError("".concat(context, " is not a WritableStream.")); + } + } + + function isAbortSignal(value) { + if (typeof value !== 'object' || value === null) { + return false; + } + try { + return typeof value.aborted === 'boolean'; + } + catch (_a) { + // AbortSignal.prototype.aborted throws if its brand check fails + return false; + } + } + var supportsAbortController = typeof AbortController === 'function'; + /** + * Construct a new AbortController, if supported by the platform. + * + * @internal + */ + function createAbortController() { + if (supportsAbortController) { + return new AbortController(); + } + return undefined; + } + + /** + * A writable stream represents a destination for data, into which you can write. + * + * @public + */ + var WritableStream = /** @class */ (function () { + function WritableStream(rawUnderlyingSink, rawStrategy) { + if (rawUnderlyingSink === void 0) { rawUnderlyingSink = {}; } + if (rawStrategy === void 0) { rawStrategy = {}; } + if (rawUnderlyingSink === undefined) { + rawUnderlyingSink = null; + } + else { + assertObject(rawUnderlyingSink, 'First parameter'); + } + var strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + var underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter'); + InitializeWritableStream(this); + var type = underlyingSink.type; + if (type !== undefined) { + throw new RangeError('Invalid type is specified'); + } + var sizeAlgorithm = ExtractSizeAlgorithm(strategy); + var highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm); + } + Object.defineProperty(WritableStream.prototype, "locked", { + /** + * Returns whether or not the writable stream is locked to a writer. + */ + get: function () { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('locked'); + } + return IsWritableStreamLocked(this); + }, + enumerable: false, + configurable: true + }); + /** + * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be + * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort + * mechanism of the underlying sink. + * + * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled + * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel + * the stream) if the stream is currently locked. + */ + WritableStream.prototype.abort = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('abort')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer')); + } + return WritableStreamAbort(this, reason); + }; + /** + * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its + * close behavior. During this time any further attempts to write will fail (without erroring the stream). + * + * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream + * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with + * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked. + */ + WritableStream.prototype.close = function () { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('close')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer')); + } + if (WritableStreamCloseQueuedOrInFlight(this)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamClose(this); + }; + /** + * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream + * is locked, no other writer can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to write to a stream + * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at + * the same time, which would cause the resulting written data to be unpredictable and probably useless. + */ + WritableStream.prototype.getWriter = function () { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('getWriter'); + } + return AcquireWritableStreamDefaultWriter(this); + }; + return WritableStream; + }()); + Object.defineProperties(WritableStream.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + getWriter: { enumerable: true }, + locked: { enumerable: true } + }); + setFunctionName(WritableStream.prototype.abort, 'abort'); + setFunctionName(WritableStream.prototype.close, 'close'); + setFunctionName(WritableStream.prototype.getWriter, 'getWriter'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(WritableStream.prototype, SymbolPolyfill.toStringTag, { + value: 'WritableStream', + configurable: true + }); + } + // Abstract operations for the WritableStream. + function AcquireWritableStreamDefaultWriter(stream) { + return new WritableStreamDefaultWriter(stream); + } + // Throws if and only if startAlgorithm throws. + function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + if (highWaterMark === void 0) { highWaterMark = 1; } + if (sizeAlgorithm === void 0) { sizeAlgorithm = function () { return 1; }; } + var stream = Object.create(WritableStream.prototype); + InitializeWritableStream(stream); + var controller = Object.create(WritableStreamDefaultController.prototype); + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + return stream; + } + function InitializeWritableStream(stream) { + stream._state = 'writable'; + // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is + // 'erroring' or 'errored'. May be set to an undefined value. + stream._storedError = undefined; + stream._writer = undefined; + // Initialize to undefined first because the constructor of the controller checks this + // variable to validate the caller. + stream._writableStreamController = undefined; + // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data + // producer without waiting for the queued writes to finish. + stream._writeRequests = new SimpleQueue(); + // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents + // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here. + stream._inFlightWriteRequest = undefined; + // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer + // has been detached. + stream._closeRequest = undefined; + // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it + // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here. + stream._inFlightCloseRequest = undefined; + // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached. + stream._pendingAbortRequest = undefined; + // The backpressure signal set by the controller. + stream._backpressure = false; + } + function IsWritableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) { + return false; + } + return x instanceof WritableStream; + } + function IsWritableStreamLocked(stream) { + if (stream._writer === undefined) { + return false; + } + return true; + } + function WritableStreamAbort(stream, reason) { + var _a; + if (stream._state === 'closed' || stream._state === 'errored') { + return promiseResolvedWith(undefined); + } + stream._writableStreamController._abortReason = reason; + (_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort(reason); + // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring', + // but it doesn't know that signaling abort runs author code that might have changed the state. + // Widen the type again by casting to WritableStreamState. + var state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseResolvedWith(undefined); + } + if (stream._pendingAbortRequest !== undefined) { + return stream._pendingAbortRequest._promise; + } + var wasAlreadyErroring = false; + if (state === 'erroring') { + wasAlreadyErroring = true; + // reason will not be used, so don't keep a reference to it. + reason = undefined; + } + var promise = newPromise(function (resolve, reject) { + stream._pendingAbortRequest = { + _promise: undefined, + _resolve: resolve, + _reject: reject, + _reason: reason, + _wasAlreadyErroring: wasAlreadyErroring + }; + }); + stream._pendingAbortRequest._promise = promise; + if (!wasAlreadyErroring) { + WritableStreamStartErroring(stream, reason); + } + return promise; + } + function WritableStreamClose(stream) { + var state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseRejectedWith(new TypeError("The stream (in ".concat(state, " state) is not in the writable state and cannot be closed"))); + } + var promise = newPromise(function (resolve, reject) { + var closeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._closeRequest = closeRequest; + }); + var writer = stream._writer; + if (writer !== undefined && stream._backpressure && state === 'writable') { + defaultWriterReadyPromiseResolve(writer); + } + WritableStreamDefaultControllerClose(stream._writableStreamController); + return promise; + } + // WritableStream API exposed for controllers. + function WritableStreamAddWriteRequest(stream) { + var promise = newPromise(function (resolve, reject) { + var writeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._writeRequests.push(writeRequest); + }); + return promise; + } + function WritableStreamDealWithRejection(stream, error) { + var state = stream._state; + if (state === 'writable') { + WritableStreamStartErroring(stream, error); + return; + } + WritableStreamFinishErroring(stream); + } + function WritableStreamStartErroring(stream, reason) { + var controller = stream._writableStreamController; + stream._state = 'erroring'; + stream._storedError = reason; + var writer = stream._writer; + if (writer !== undefined) { + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason); + } + if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) { + WritableStreamFinishErroring(stream); + } + } + function WritableStreamFinishErroring(stream) { + stream._state = 'errored'; + stream._writableStreamController[ErrorSteps](); + var storedError = stream._storedError; + stream._writeRequests.forEach(function (writeRequest) { + writeRequest._reject(storedError); + }); + stream._writeRequests = new SimpleQueue(); + if (stream._pendingAbortRequest === undefined) { + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + var abortRequest = stream._pendingAbortRequest; + stream._pendingAbortRequest = undefined; + if (abortRequest._wasAlreadyErroring) { + abortRequest._reject(storedError); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + var promise = stream._writableStreamController[AbortSteps](abortRequest._reason); + uponPromise(promise, function () { + abortRequest._resolve(); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }, function (reason) { + abortRequest._reject(reason); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }); + } + function WritableStreamFinishInFlightWrite(stream) { + stream._inFlightWriteRequest._resolve(undefined); + stream._inFlightWriteRequest = undefined; + } + function WritableStreamFinishInFlightWriteWithError(stream, error) { + stream._inFlightWriteRequest._reject(error); + stream._inFlightWriteRequest = undefined; + WritableStreamDealWithRejection(stream, error); + } + function WritableStreamFinishInFlightClose(stream) { + stream._inFlightCloseRequest._resolve(undefined); + stream._inFlightCloseRequest = undefined; + var state = stream._state; + if (state === 'erroring') { + // The error was too late to do anything, so it is ignored. + stream._storedError = undefined; + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._resolve(); + stream._pendingAbortRequest = undefined; + } + } + stream._state = 'closed'; + var writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseResolve(writer); + } + } + function WritableStreamFinishInFlightCloseWithError(stream, error) { + stream._inFlightCloseRequest._reject(error); + stream._inFlightCloseRequest = undefined; + // Never execute sink abort() after sink close(). + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._reject(error); + stream._pendingAbortRequest = undefined; + } + WritableStreamDealWithRejection(stream, error); + } + // TODO(ricea): Fix alphabetical order. + function WritableStreamCloseQueuedOrInFlight(stream) { + if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; + } + function WritableStreamHasOperationMarkedInFlight(stream) { + if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; + } + function WritableStreamMarkCloseRequestInFlight(stream) { + stream._inFlightCloseRequest = stream._closeRequest; + stream._closeRequest = undefined; + } + function WritableStreamMarkFirstWriteRequestInFlight(stream) { + stream._inFlightWriteRequest = stream._writeRequests.shift(); + } + function WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) { + if (stream._closeRequest !== undefined) { + stream._closeRequest._reject(stream._storedError); + stream._closeRequest = undefined; + } + var writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseReject(writer, stream._storedError); + } + } + function WritableStreamUpdateBackpressure(stream, backpressure) { + var writer = stream._writer; + if (writer !== undefined && backpressure !== stream._backpressure) { + if (backpressure) { + defaultWriterReadyPromiseReset(writer); + } + else { + defaultWriterReadyPromiseResolve(writer); + } + } + stream._backpressure = backpressure; + } + /** + * A default writer vended by a {@link WritableStream}. + * + * @public + */ + var WritableStreamDefaultWriter = /** @class */ (function () { + function WritableStreamDefaultWriter(stream) { + assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter'); + assertWritableStream(stream, 'First parameter'); + if (IsWritableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive writing by another writer'); + } + this._ownerWritableStream = stream; + stream._writer = this; + var state = stream._state; + if (state === 'writable') { + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) { + defaultWriterReadyPromiseInitialize(this); + } + else { + defaultWriterReadyPromiseInitializeAsResolved(this); + } + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'erroring') { + defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError); + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'closed') { + defaultWriterReadyPromiseInitializeAsResolved(this); + defaultWriterClosedPromiseInitializeAsResolved(this); + } + else { + var storedError = stream._storedError; + defaultWriterReadyPromiseInitializeAsRejected(this, storedError); + defaultWriterClosedPromiseInitializeAsRejected(this, storedError); + } + } + Object.defineProperty(WritableStreamDefaultWriter.prototype, "closed", { + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the writer’s lock is released before the stream finishes closing. + */ + get: function () { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('closed')); + } + return this._closedPromise; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(WritableStreamDefaultWriter.prototype, "desiredSize", { + /** + * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full. + * A producer can use this information to determine the right amount of data to write. + * + * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort + * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when + * the writer’s lock is released. + */ + get: function () { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('desiredSize'); + } + if (this._ownerWritableStream === undefined) { + throw defaultWriterLockException('desiredSize'); + } + return WritableStreamDefaultWriterGetDesiredSize(this); + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(WritableStreamDefaultWriter.prototype, "ready", { + /** + * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions + * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips + * back to zero or below, the getter will return a new promise that stays pending until the next transition. + * + * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become + * rejected. + */ + get: function () { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('ready')); + } + return this._readyPromise; + }, + enumerable: false, + configurable: true + }); + /** + * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}. + */ + WritableStreamDefaultWriter.prototype.abort = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('abort')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('abort')); + } + return WritableStreamDefaultWriterAbort(this, reason); + }; + /** + * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}. + */ + WritableStreamDefaultWriter.prototype.close = function () { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('close')); + } + var stream = this._ownerWritableStream; + if (stream === undefined) { + return promiseRejectedWith(defaultWriterLockException('close')); + } + if (WritableStreamCloseQueuedOrInFlight(stream)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamDefaultWriterClose(this); + }; + /** + * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active. + * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from + * now on; otherwise, the writer will appear closed. + * + * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the + * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled). + * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents + * other producers from writing in an interleaved manner. + */ + WritableStreamDefaultWriter.prototype.releaseLock = function () { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('releaseLock'); + } + var stream = this._ownerWritableStream; + if (stream === undefined) { + return; + } + WritableStreamDefaultWriterRelease(this); + }; + WritableStreamDefaultWriter.prototype.write = function (chunk) { + if (chunk === void 0) { chunk = undefined; } + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('write')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + return WritableStreamDefaultWriterWrite(this, chunk); + }; + return WritableStreamDefaultWriter; + }()); + Object.defineProperties(WritableStreamDefaultWriter.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + releaseLock: { enumerable: true }, + write: { enumerable: true }, + closed: { enumerable: true }, + desiredSize: { enumerable: true }, + ready: { enumerable: true } + }); + setFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort'); + setFunctionName(WritableStreamDefaultWriter.prototype.close, 'close'); + setFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock'); + setFunctionName(WritableStreamDefaultWriter.prototype.write, 'write'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultWriter.prototype, SymbolPolyfill.toStringTag, { + value: 'WritableStreamDefaultWriter', + configurable: true + }); + } + // Abstract operations for the WritableStreamDefaultWriter. + function IsWritableStreamDefaultWriter(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultWriter; + } + // A client of WritableStreamDefaultWriter may use these functions directly to bypass state check. + function WritableStreamDefaultWriterAbort(writer, reason) { + var stream = writer._ownerWritableStream; + return WritableStreamAbort(stream, reason); + } + function WritableStreamDefaultWriterClose(writer) { + var stream = writer._ownerWritableStream; + return WritableStreamClose(stream); + } + function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) { + var stream = writer._ownerWritableStream; + var state = stream._state; + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseResolvedWith(undefined); + } + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + return WritableStreamDefaultWriterClose(writer); + } + function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) { + if (writer._closedPromiseState === 'pending') { + defaultWriterClosedPromiseReject(writer, error); + } + else { + defaultWriterClosedPromiseResetToRejected(writer, error); + } + } + function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) { + if (writer._readyPromiseState === 'pending') { + defaultWriterReadyPromiseReject(writer, error); + } + else { + defaultWriterReadyPromiseResetToRejected(writer, error); + } + } + function WritableStreamDefaultWriterGetDesiredSize(writer) { + var stream = writer._ownerWritableStream; + var state = stream._state; + if (state === 'errored' || state === 'erroring') { + return null; + } + if (state === 'closed') { + return 0; + } + return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController); + } + function WritableStreamDefaultWriterRelease(writer) { + var stream = writer._ownerWritableStream; + var releasedError = new TypeError("Writer was released and can no longer be used to monitor the stream's closedness"); + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError); + // The state transitions to "errored" before the sink abort() method runs, but the writer.closed promise is not + // rejected until afterwards. This means that simply testing state will not work. + WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError); + stream._writer = undefined; + writer._ownerWritableStream = undefined; + } + function WritableStreamDefaultWriterWrite(writer, chunk) { + var stream = writer._ownerWritableStream; + var controller = stream._writableStreamController; + var chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk); + if (stream !== writer._ownerWritableStream) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + var state = stream._state; + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to')); + } + if (state === 'erroring') { + return promiseRejectedWith(stream._storedError); + } + var promise = WritableStreamAddWriteRequest(stream); + WritableStreamDefaultControllerWrite(controller, chunk, chunkSize); + return promise; + } + var closeSentinel = {}; + /** + * Allows control of a {@link WritableStream | writable stream}'s state and internal queue. + * + * @public + */ + var WritableStreamDefaultController = /** @class */ (function () { + function WritableStreamDefaultController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(WritableStreamDefaultController.prototype, "abortReason", { + /** + * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted. + * + * @deprecated + * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177. + * Use {@link WritableStreamDefaultController.signal}'s `reason` instead. + */ + get: function () { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('abortReason'); + } + return this._abortReason; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(WritableStreamDefaultController.prototype, "signal", { + /** + * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted. + */ + get: function () { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('signal'); + } + if (this._abortController === undefined) { + // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`. + // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill, + // so instead we only implement support for `signal` if we find a global `AbortController` constructor. + throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported'); + } + return this._abortController.signal; + }, + enumerable: false, + configurable: true + }); + /** + * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`. + * + * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying + * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the + * normal lifecycle of interactions with the underlying sink. + */ + WritableStreamDefaultController.prototype.error = function (e) { + if (e === void 0) { e = undefined; } + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('error'); + } + var state = this._controlledWritableStream._state; + if (state !== 'writable') { + // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so + // just treat it as a no-op. + return; + } + WritableStreamDefaultControllerError(this, e); + }; + /** @internal */ + WritableStreamDefaultController.prototype[AbortSteps] = function (reason) { + var result = this._abortAlgorithm(reason); + WritableStreamDefaultControllerClearAlgorithms(this); + return result; + }; + /** @internal */ + WritableStreamDefaultController.prototype[ErrorSteps] = function () { + ResetQueue(this); + }; + return WritableStreamDefaultController; + }()); + Object.defineProperties(WritableStreamDefaultController.prototype, { + abortReason: { enumerable: true }, + signal: { enumerable: true }, + error: { enumerable: true } + }); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultController.prototype, SymbolPolyfill.toStringTag, { + value: 'WritableStreamDefaultController', + configurable: true + }); + } + // Abstract operations implementing interface required by the WritableStream. + function IsWritableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultController; + } + function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledWritableStream = stream; + stream._writableStreamController = controller; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._abortReason = undefined; + controller._abortController = createAbortController(); + controller._started = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._writeAlgorithm = writeAlgorithm; + controller._closeAlgorithm = closeAlgorithm; + controller._abortAlgorithm = abortAlgorithm; + var backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + var startResult = startAlgorithm(); + var startPromise = promiseResolvedWith(startResult); + uponPromise(startPromise, function () { + controller._started = true; + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, function (r) { + controller._started = true; + WritableStreamDealWithRejection(stream, r); + return null; + }); + } + function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) { + var controller = Object.create(WritableStreamDefaultController.prototype); + var startAlgorithm; + var writeAlgorithm; + var closeAlgorithm; + var abortAlgorithm; + if (underlyingSink.start !== undefined) { + startAlgorithm = function () { return underlyingSink.start(controller); }; + } + else { + startAlgorithm = function () { return undefined; }; + } + if (underlyingSink.write !== undefined) { + writeAlgorithm = function (chunk) { return underlyingSink.write(chunk, controller); }; + } + else { + writeAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingSink.close !== undefined) { + closeAlgorithm = function () { return underlyingSink.close(); }; + } + else { + closeAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingSink.abort !== undefined) { + abortAlgorithm = function (reason) { return underlyingSink.abort(reason); }; + } + else { + abortAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + } + // ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls. + function WritableStreamDefaultControllerClearAlgorithms(controller) { + controller._writeAlgorithm = undefined; + controller._closeAlgorithm = undefined; + controller._abortAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; + } + function WritableStreamDefaultControllerClose(controller) { + EnqueueValueWithSize(controller, closeSentinel, 0); + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + } + function WritableStreamDefaultControllerGetChunkSize(controller, chunk) { + try { + return controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE); + return 1; + } + } + function WritableStreamDefaultControllerGetDesiredSize(controller) { + return controller._strategyHWM - controller._queueTotalSize; + } + function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) { + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE); + return; + } + var stream = controller._controlledWritableStream; + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') { + var backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + } + // Abstract operations for the WritableStreamDefaultController. + function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) { + var stream = controller._controlledWritableStream; + if (!controller._started) { + return; + } + if (stream._inFlightWriteRequest !== undefined) { + return; + } + var state = stream._state; + if (state === 'erroring') { + WritableStreamFinishErroring(stream); + return; + } + if (controller._queue.length === 0) { + return; + } + var value = PeekQueueValue(controller); + if (value === closeSentinel) { + WritableStreamDefaultControllerProcessClose(controller); + } + else { + WritableStreamDefaultControllerProcessWrite(controller, value); + } + } + function WritableStreamDefaultControllerErrorIfNeeded(controller, error) { + if (controller._controlledWritableStream._state === 'writable') { + WritableStreamDefaultControllerError(controller, error); + } + } + function WritableStreamDefaultControllerProcessClose(controller) { + var stream = controller._controlledWritableStream; + WritableStreamMarkCloseRequestInFlight(stream); + DequeueValue(controller); + var sinkClosePromise = controller._closeAlgorithm(); + WritableStreamDefaultControllerClearAlgorithms(controller); + uponPromise(sinkClosePromise, function () { + WritableStreamFinishInFlightClose(stream); + return null; + }, function (reason) { + WritableStreamFinishInFlightCloseWithError(stream, reason); + return null; + }); + } + function WritableStreamDefaultControllerProcessWrite(controller, chunk) { + var stream = controller._controlledWritableStream; + WritableStreamMarkFirstWriteRequestInFlight(stream); + var sinkWritePromise = controller._writeAlgorithm(chunk); + uponPromise(sinkWritePromise, function () { + WritableStreamFinishInFlightWrite(stream); + var state = stream._state; + DequeueValue(controller); + if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') { + var backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, function (reason) { + if (stream._state === 'writable') { + WritableStreamDefaultControllerClearAlgorithms(controller); + } + WritableStreamFinishInFlightWriteWithError(stream, reason); + return null; + }); + } + function WritableStreamDefaultControllerGetBackpressure(controller) { + var desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller); + return desiredSize <= 0; + } + // A client of WritableStreamDefaultController may use these functions directly to bypass state check. + function WritableStreamDefaultControllerError(controller, error) { + var stream = controller._controlledWritableStream; + WritableStreamDefaultControllerClearAlgorithms(controller); + WritableStreamStartErroring(stream, error); + } + // Helper functions for the WritableStream. + function streamBrandCheckException$2(name) { + return new TypeError("WritableStream.prototype.".concat(name, " can only be used on a WritableStream")); + } + // Helper functions for the WritableStreamDefaultController. + function defaultControllerBrandCheckException$2(name) { + return new TypeError("WritableStreamDefaultController.prototype.".concat(name, " can only be used on a WritableStreamDefaultController")); + } + // Helper functions for the WritableStreamDefaultWriter. + function defaultWriterBrandCheckException(name) { + return new TypeError("WritableStreamDefaultWriter.prototype.".concat(name, " can only be used on a WritableStreamDefaultWriter")); + } + function defaultWriterLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released writer'); + } + function defaultWriterClosedPromiseInitialize(writer) { + writer._closedPromise = newPromise(function (resolve, reject) { + writer._closedPromise_resolve = resolve; + writer._closedPromise_reject = reject; + writer._closedPromiseState = 'pending'; + }); + } + function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseReject(writer, reason); + } + function defaultWriterClosedPromiseInitializeAsResolved(writer) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseResolve(writer); + } + function defaultWriterClosedPromiseReject(writer, reason) { + if (writer._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._closedPromise); + writer._closedPromise_reject(reason); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'rejected'; + } + function defaultWriterClosedPromiseResetToRejected(writer, reason) { + defaultWriterClosedPromiseInitializeAsRejected(writer, reason); + } + function defaultWriterClosedPromiseResolve(writer) { + if (writer._closedPromise_resolve === undefined) { + return; + } + writer._closedPromise_resolve(undefined); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'resolved'; + } + function defaultWriterReadyPromiseInitialize(writer) { + writer._readyPromise = newPromise(function (resolve, reject) { + writer._readyPromise_resolve = resolve; + writer._readyPromise_reject = reject; + }); + writer._readyPromiseState = 'pending'; + } + function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseReject(writer, reason); + } + function defaultWriterReadyPromiseInitializeAsResolved(writer) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseResolve(writer); + } + function defaultWriterReadyPromiseReject(writer, reason) { + if (writer._readyPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._readyPromise); + writer._readyPromise_reject(reason); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'rejected'; + } + function defaultWriterReadyPromiseReset(writer) { + defaultWriterReadyPromiseInitialize(writer); + } + function defaultWriterReadyPromiseResetToRejected(writer, reason) { + defaultWriterReadyPromiseInitializeAsRejected(writer, reason); + } + function defaultWriterReadyPromiseResolve(writer) { + if (writer._readyPromise_resolve === undefined) { + return; + } + writer._readyPromise_resolve(undefined); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'fulfilled'; + } + + /// + function getGlobals() { + if (typeof globalThis !== 'undefined') { + return globalThis; + } + else if (typeof self !== 'undefined') { + return self; + } + else if (typeof global !== 'undefined') { + return global; + } + return undefined; + } + var globals = getGlobals(); + + /// + function isDOMExceptionConstructor(ctor) { + if (!(typeof ctor === 'function' || typeof ctor === 'object')) { + return false; + } + if (ctor.name !== 'DOMException') { + return false; + } + try { + new ctor(); + return true; + } + catch (_a) { + return false; + } + } + /** + * Support: + * - Web browsers + * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87) + */ + function getFromGlobal() { + var ctor = globals === null || globals === void 0 ? void 0 : globals.DOMException; + return isDOMExceptionConstructor(ctor) ? ctor : undefined; + } + /** + * Support: + * - All platforms + */ + function createPolyfill() { + // eslint-disable-next-line @typescript-eslint/no-shadow + var ctor = function DOMException(message, name) { + this.message = message || ''; + this.name = name || 'Error'; + if (Error.captureStackTrace) { + Error.captureStackTrace(this, this.constructor); + } + }; + setFunctionName(ctor, 'DOMException'); + ctor.prototype = Object.create(Error.prototype); + Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true }); + return ctor; + } + // eslint-disable-next-line @typescript-eslint/no-redeclare + var DOMException = getFromGlobal() || createPolyfill(); + + function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) { + var reader = AcquireReadableStreamDefaultReader(source); + var writer = AcquireWritableStreamDefaultWriter(dest); + source._disturbed = true; + var shuttingDown = false; + // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown. + var currentWrite = promiseResolvedWith(undefined); + return newPromise(function (resolve, reject) { + var abortAlgorithm; + if (signal !== undefined) { + abortAlgorithm = function () { + var error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError'); + var actions = []; + if (!preventAbort) { + actions.push(function () { + if (dest._state === 'writable') { + return WritableStreamAbort(dest, error); + } + return promiseResolvedWith(undefined); + }); + } + if (!preventCancel) { + actions.push(function () { + if (source._state === 'readable') { + return ReadableStreamCancel(source, error); + } + return promiseResolvedWith(undefined); + }); + } + shutdownWithAction(function () { return Promise.all(actions.map(function (action) { return action(); })); }, true, error); + }; + if (signal.aborted) { + abortAlgorithm(); + return; + } + signal.addEventListener('abort', abortAlgorithm); + } + // Using reader and writer, read all chunks from this and write them to dest + // - Backpressure must be enforced + // - Shutdown must stop all activity + function pipeLoop() { + return newPromise(function (resolveLoop, rejectLoop) { + function next(done) { + if (done) { + resolveLoop(); + } + else { + // Use `PerformPromiseThen` instead of `uponPromise` to avoid + // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers + PerformPromiseThen(pipeStep(), next, rejectLoop); + } + } + next(false); + }); + } + function pipeStep() { + if (shuttingDown) { + return promiseResolvedWith(true); + } + return PerformPromiseThen(writer._readyPromise, function () { + return newPromise(function (resolveRead, rejectRead) { + ReadableStreamDefaultReaderRead(reader, { + _chunkSteps: function (chunk) { + currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop); + resolveRead(false); + }, + _closeSteps: function () { return resolveRead(true); }, + _errorSteps: rejectRead + }); + }); + }); + } + // Errors must be propagated forward + isOrBecomesErrored(source, reader._closedPromise, function (storedError) { + if (!preventAbort) { + shutdownWithAction(function () { return WritableStreamAbort(dest, storedError); }, true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Errors must be propagated backward + isOrBecomesErrored(dest, writer._closedPromise, function (storedError) { + if (!preventCancel) { + shutdownWithAction(function () { return ReadableStreamCancel(source, storedError); }, true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Closing must be propagated forward + isOrBecomesClosed(source, reader._closedPromise, function () { + if (!preventClose) { + shutdownWithAction(function () { return WritableStreamDefaultWriterCloseWithErrorPropagation(writer); }); + } + else { + shutdown(); + } + return null; + }); + // Closing must be propagated backward + if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') { + var destClosed_1 = new TypeError('the destination writable stream closed before all data could be piped to it'); + if (!preventCancel) { + shutdownWithAction(function () { return ReadableStreamCancel(source, destClosed_1); }, true, destClosed_1); + } + else { + shutdown(true, destClosed_1); + } + } + setPromiseIsHandledToTrue(pipeLoop()); + function waitForWritesToFinish() { + // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait + // for that too. + var oldCurrentWrite = currentWrite; + return PerformPromiseThen(currentWrite, function () { return oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined; }); + } + function isOrBecomesErrored(stream, promise, action) { + if (stream._state === 'errored') { + action(stream._storedError); + } + else { + uponRejection(promise, action); + } + } + function isOrBecomesClosed(stream, promise, action) { + if (stream._state === 'closed') { + action(); + } + else { + uponFulfillment(promise, action); + } + } + function shutdownWithAction(action, originalIsError, originalError) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), doTheRest); + } + else { + doTheRest(); + } + function doTheRest() { + uponPromise(action(), function () { return finalize(originalIsError, originalError); }, function (newError) { return finalize(true, newError); }); + return null; + } + } + function shutdown(isError, error) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), function () { return finalize(isError, error); }); + } + else { + finalize(isError, error); + } + } + function finalize(isError, error) { + WritableStreamDefaultWriterRelease(writer); + ReadableStreamReaderGenericRelease(reader); + if (signal !== undefined) { + signal.removeEventListener('abort', abortAlgorithm); + } + if (isError) { + reject(error); + } + else { + resolve(undefined); + } + return null; + } + }); + } + + /** + * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue. + * + * @public + */ + var ReadableStreamDefaultController = /** @class */ (function () { + function ReadableStreamDefaultController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(ReadableStreamDefaultController.prototype, "desiredSize", { + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying source ought to use this information to determine when and how to apply backpressure. + */ + get: function () { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('desiredSize'); + } + return ReadableStreamDefaultControllerGetDesiredSize(this); + }, + enumerable: false, + configurable: true + }); + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + ReadableStreamDefaultController.prototype.close = function () { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('close'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits close'); + } + ReadableStreamDefaultControllerClose(this); + }; + ReadableStreamDefaultController.prototype.enqueue = function (chunk) { + if (chunk === void 0) { chunk = undefined; } + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('enqueue'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits enqueue'); + } + return ReadableStreamDefaultControllerEnqueue(this, chunk); + }; + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + ReadableStreamDefaultController.prototype.error = function (e) { + if (e === void 0) { e = undefined; } + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('error'); + } + ReadableStreamDefaultControllerError(this, e); + }; + /** @internal */ + ReadableStreamDefaultController.prototype[CancelSteps] = function (reason) { + ResetQueue(this); + var result = this._cancelAlgorithm(reason); + ReadableStreamDefaultControllerClearAlgorithms(this); + return result; + }; + /** @internal */ + ReadableStreamDefaultController.prototype[PullSteps] = function (readRequest) { + var stream = this._controlledReadableStream; + if (this._queue.length > 0) { + var chunk = DequeueValue(this); + if (this._closeRequested && this._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(this); + ReadableStreamClose(stream); + } + else { + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + readRequest._chunkSteps(chunk); + } + else { + ReadableStreamAddReadRequest(stream, readRequest); + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + }; + /** @internal */ + ReadableStreamDefaultController.prototype[ReleaseSteps] = function () { + // Do nothing. + }; + return ReadableStreamDefaultController; + }()); + Object.defineProperties(ReadableStreamDefaultController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(ReadableStreamDefaultController.prototype.close, 'close'); + setFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue'); + setFunctionName(ReadableStreamDefaultController.prototype.error, 'error'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultController.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamDefaultController', + configurable: true + }); + } + // Abstract operations for the ReadableStreamDefaultController. + function IsReadableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) { + return false; + } + return x instanceof ReadableStreamDefaultController; + } + function ReadableStreamDefaultControllerCallPullIfNeeded(controller) { + var shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + var pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, function () { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + return null; + }, function (e) { + ReadableStreamDefaultControllerError(controller, e); + return null; + }); + } + function ReadableStreamDefaultControllerShouldCallPull(controller) { + var stream = controller._controlledReadableStream; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return false; + } + if (!controller._started) { + return false; + } + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + var desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; + } + function ReadableStreamDefaultControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; + } + // A client of ReadableStreamDefaultController may use these functions directly to bypass state check. + function ReadableStreamDefaultControllerClose(controller) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + var stream = controller._controlledReadableStream; + controller._closeRequested = true; + if (controller._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } + } + function ReadableStreamDefaultControllerEnqueue(controller, chunk) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + var stream = controller._controlledReadableStream; + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + ReadableStreamFulfillReadRequest(stream, chunk, false); + } + else { + var chunkSize = void 0; + try { + chunkSize = controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + ReadableStreamDefaultControllerError(controller, chunkSizeE); + throw chunkSizeE; + } + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + ReadableStreamDefaultControllerError(controller, enqueueE); + throw enqueueE; + } + } + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + function ReadableStreamDefaultControllerError(controller, e) { + var stream = controller._controlledReadableStream; + if (stream._state !== 'readable') { + return; + } + ResetQueue(controller); + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); + } + function ReadableStreamDefaultControllerGetDesiredSize(controller) { + var state = controller._controlledReadableStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; + } + // This is used in the implementation of TransformStream. + function ReadableStreamDefaultControllerHasBackpressure(controller) { + if (ReadableStreamDefaultControllerShouldCallPull(controller)) { + return false; + } + return true; + } + function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) { + var state = controller._controlledReadableStream._state; + if (!controller._closeRequested && state === 'readable') { + return true; + } + return false; + } + function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledReadableStream = stream; + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._started = false; + controller._closeRequested = false; + controller._pullAgain = false; + controller._pulling = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + stream._readableStreamController = controller; + var startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), function () { + controller._started = true; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + return null; + }, function (r) { + ReadableStreamDefaultControllerError(controller, r); + return null; + }); + } + function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) { + var controller = Object.create(ReadableStreamDefaultController.prototype); + var startAlgorithm; + var pullAlgorithm; + var cancelAlgorithm; + if (underlyingSource.start !== undefined) { + startAlgorithm = function () { return underlyingSource.start(controller); }; + } + else { + startAlgorithm = function () { return undefined; }; + } + if (underlyingSource.pull !== undefined) { + pullAlgorithm = function () { return underlyingSource.pull(controller); }; + } + else { + pullAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingSource.cancel !== undefined) { + cancelAlgorithm = function (reason) { return underlyingSource.cancel(reason); }; + } + else { + cancelAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + } + // Helper functions for the ReadableStreamDefaultController. + function defaultControllerBrandCheckException$1(name) { + return new TypeError("ReadableStreamDefaultController.prototype.".concat(name, " can only be used on a ReadableStreamDefaultController")); + } + + function ReadableStreamTee(stream, cloneForBranch2) { + if (IsReadableByteStreamController(stream._readableStreamController)) { + return ReadableByteStreamTee(stream); + } + return ReadableStreamDefaultTee(stream); + } + function ReadableStreamDefaultTee(stream, cloneForBranch2) { + var reader = AcquireReadableStreamDefaultReader(stream); + var reading = false; + var readAgain = false; + var canceled1 = false; + var canceled2 = false; + var reason1; + var reason2; + var branch1; + var branch2; + var resolveCancelPromise; + var cancelPromise = newPromise(function (resolve) { + resolveCancelPromise = resolve; + }); + function pullAlgorithm() { + if (reading) { + readAgain = true; + return promiseResolvedWith(undefined); + } + reading = true; + var readRequest = { + _chunkSteps: function (chunk) { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(function () { + readAgain = false; + var chunk1 = chunk; + var chunk2 = chunk; + // There is no way to access the cloning code right now in the reference implementation. + // If we add one then we'll need an implementation for serializable objects. + // if (!canceled2 && cloneForBranch2) { + // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2)); + // } + if (!canceled1) { + ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgain) { + pullAlgorithm(); + } + }); + }, + _closeSteps: function () { + reading = false; + if (!canceled1) { + ReadableStreamDefaultControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableStreamDefaultControllerClose(branch2._readableStreamController); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: function () { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + // do nothing + } + branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm); + branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm); + uponRejection(reader._closedPromise, function (r) { + ReadableStreamDefaultControllerError(branch1._readableStreamController, r); + ReadableStreamDefaultControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + return [branch1, branch2]; + } + function ReadableByteStreamTee(stream) { + var reader = AcquireReadableStreamDefaultReader(stream); + var reading = false; + var readAgainForBranch1 = false; + var readAgainForBranch2 = false; + var canceled1 = false; + var canceled2 = false; + var reason1; + var reason2; + var branch1; + var branch2; + var resolveCancelPromise; + var cancelPromise = newPromise(function (resolve) { + resolveCancelPromise = resolve; + }); + function forwardReaderError(thisReader) { + uponRejection(thisReader._closedPromise, function (r) { + if (thisReader !== reader) { + return null; + } + ReadableByteStreamControllerError(branch1._readableStreamController, r); + ReadableByteStreamControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + } + function pullWithDefaultReader() { + if (IsReadableStreamBYOBReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamDefaultReader(stream); + forwardReaderError(reader); + } + var readRequest = { + _chunkSteps: function (chunk) { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(function () { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + var chunk1 = chunk; + var chunk2 = chunk; + if (!canceled1 && !canceled2) { + try { + chunk2 = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(branch1._readableStreamController, cloneE); + ReadableByteStreamControllerError(branch2._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + } + if (!canceled1) { + ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: function () { + reading = false; + if (!canceled1) { + ReadableByteStreamControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableByteStreamControllerClose(branch2._readableStreamController); + } + if (branch1._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch1._readableStreamController, 0); + } + if (branch2._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch2._readableStreamController, 0); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: function () { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + } + function pullWithBYOBReader(view, forBranch2) { + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamBYOBReader(stream); + forwardReaderError(reader); + } + var byobBranch = forBranch2 ? branch2 : branch1; + var otherBranch = forBranch2 ? branch1 : branch2; + var readIntoRequest = { + _chunkSteps: function (chunk) { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(function () { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + var byobCanceled = forBranch2 ? canceled2 : canceled1; + var otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!otherCanceled) { + var clonedChunk = void 0; + try { + clonedChunk = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE); + ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk); + } + else if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: function (chunk) { + reading = false; + var byobCanceled = forBranch2 ? canceled2 : canceled1; + var otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!byobCanceled) { + ReadableByteStreamControllerClose(byobBranch._readableStreamController); + } + if (!otherCanceled) { + ReadableByteStreamControllerClose(otherBranch._readableStreamController); + } + if (chunk !== undefined) { + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0); + } + } + if (!byobCanceled || !otherCanceled) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: function () { + reading = false; + } + }; + ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest); + } + function pull1Algorithm() { + if (reading) { + readAgainForBranch1 = true; + return promiseResolvedWith(undefined); + } + reading = true; + var byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, false); + } + return promiseResolvedWith(undefined); + } + function pull2Algorithm() { + if (reading) { + readAgainForBranch2 = true; + return promiseResolvedWith(undefined); + } + reading = true; + var byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, true); + } + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + return; + } + branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm); + branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm); + forwardReaderError(reader); + return [branch1, branch2]; + } + + function isReadableStreamLike(stream) { + return typeIsObject(stream) && typeof stream.getReader !== 'undefined'; + } + + function ReadableStreamFrom(source) { + if (isReadableStreamLike(source)) { + return ReadableStreamFromDefaultReader(source.getReader()); + } + return ReadableStreamFromIterable(source); + } + function ReadableStreamFromIterable(asyncIterable) { + var stream; + var iteratorRecord = GetIterator(asyncIterable, 'async'); + var startAlgorithm = noop; + function pullAlgorithm() { + var nextResult; + try { + nextResult = IteratorNext(iteratorRecord); + } + catch (e) { + return promiseRejectedWith(e); + } + var nextPromise = promiseResolvedWith(nextResult); + return transformPromiseWith(nextPromise, function (iterResult) { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object'); + } + var done = IteratorComplete(iterResult); + if (done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + var value = IteratorValue(iterResult); + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + var iterator = iteratorRecord.iterator; + var returnMethod; + try { + returnMethod = GetMethod(iterator, 'return'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (returnMethod === undefined) { + return promiseResolvedWith(undefined); + } + var returnResult; + try { + returnResult = reflectCall(returnMethod, iterator, [reason]); + } + catch (e) { + return promiseRejectedWith(e); + } + var returnPromise = promiseResolvedWith(returnResult); + return transformPromiseWith(returnPromise, function (iterResult) { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object'); + } + return undefined; + }); + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; + } + function ReadableStreamFromDefaultReader(reader) { + var stream; + var startAlgorithm = noop; + function pullAlgorithm() { + var readPromise; + try { + readPromise = reader.read(); + } + catch (e) { + return promiseRejectedWith(e); + } + return transformPromiseWith(readPromise, function (readResult) { + if (!typeIsObject(readResult)) { + throw new TypeError('The promise returned by the reader.read() method must fulfill with an object'); + } + if (readResult.done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + var value = readResult.value; + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + try { + return promiseResolvedWith(reader.cancel(reason)); + } + catch (e) { + return promiseRejectedWith(e); + } + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; + } + + function convertUnderlyingDefaultOrByteSource(source, context) { + assertDictionary(source, context); + var original = source; + var autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize; + var cancel = original === null || original === void 0 ? void 0 : original.cancel; + var pull = original === null || original === void 0 ? void 0 : original.pull; + var start = original === null || original === void 0 ? void 0 : original.start; + var type = original === null || original === void 0 ? void 0 : original.type; + return { + autoAllocateChunkSize: autoAllocateChunkSize === undefined ? + undefined : + convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, "".concat(context, " has member 'autoAllocateChunkSize' that")), + cancel: cancel === undefined ? + undefined : + convertUnderlyingSourceCancelCallback(cancel, original, "".concat(context, " has member 'cancel' that")), + pull: pull === undefined ? + undefined : + convertUnderlyingSourcePullCallback(pull, original, "".concat(context, " has member 'pull' that")), + start: start === undefined ? + undefined : + convertUnderlyingSourceStartCallback(start, original, "".concat(context, " has member 'start' that")), + type: type === undefined ? undefined : convertReadableStreamType(type, "".concat(context, " has member 'type' that")) + }; + } + function convertUnderlyingSourceCancelCallback(fn, original, context) { + assertFunction(fn, context); + return function (reason) { return promiseCall(fn, original, [reason]); }; + } + function convertUnderlyingSourcePullCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return promiseCall(fn, original, [controller]); }; + } + function convertUnderlyingSourceStartCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return reflectCall(fn, original, [controller]); }; + } + function convertReadableStreamType(type, context) { + type = "".concat(type); + if (type !== 'bytes') { + throw new TypeError("".concat(context, " '").concat(type, "' is not a valid enumeration value for ReadableStreamType")); + } + return type; + } + + function convertIteratorOptions(options, context) { + assertDictionary(options, context); + var preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + return { preventCancel: Boolean(preventCancel) }; + } + + function convertPipeOptions(options, context) { + assertDictionary(options, context); + var preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort; + var preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + var preventClose = options === null || options === void 0 ? void 0 : options.preventClose; + var signal = options === null || options === void 0 ? void 0 : options.signal; + if (signal !== undefined) { + assertAbortSignal(signal, "".concat(context, " has member 'signal' that")); + } + return { + preventAbort: Boolean(preventAbort), + preventCancel: Boolean(preventCancel), + preventClose: Boolean(preventClose), + signal: signal + }; + } + function assertAbortSignal(signal, context) { + if (!isAbortSignal(signal)) { + throw new TypeError("".concat(context, " is not an AbortSignal.")); + } + } + + function convertReadableWritablePair(pair, context) { + assertDictionary(pair, context); + var readable = pair === null || pair === void 0 ? void 0 : pair.readable; + assertRequiredField(readable, 'readable', 'ReadableWritablePair'); + assertReadableStream(readable, "".concat(context, " has member 'readable' that")); + var writable = pair === null || pair === void 0 ? void 0 : pair.writable; + assertRequiredField(writable, 'writable', 'ReadableWritablePair'); + assertWritableStream(writable, "".concat(context, " has member 'writable' that")); + return { readable: readable, writable: writable }; + } + + /** + * A readable stream represents a source of data, from which you can read. + * + * @public + */ + var ReadableStream = /** @class */ (function () { + function ReadableStream(rawUnderlyingSource, rawStrategy) { + if (rawUnderlyingSource === void 0) { rawUnderlyingSource = {}; } + if (rawStrategy === void 0) { rawStrategy = {}; } + if (rawUnderlyingSource === undefined) { + rawUnderlyingSource = null; + } + else { + assertObject(rawUnderlyingSource, 'First parameter'); + } + var strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + var underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter'); + InitializeReadableStream(this); + if (underlyingSource.type === 'bytes') { + if (strategy.size !== undefined) { + throw new RangeError('The strategy for a byte stream cannot have a size function'); + } + var highWaterMark = ExtractHighWaterMark(strategy, 0); + SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark); + } + else { + var sizeAlgorithm = ExtractSizeAlgorithm(strategy); + var highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm); + } + } + Object.defineProperty(ReadableStream.prototype, "locked", { + /** + * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}. + */ + get: function () { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('locked'); + } + return IsReadableStreamLocked(this); + }, + enumerable: false, + configurable: true + }); + /** + * Cancels the stream, signaling a loss of interest in the stream by a consumer. + * + * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()} + * method, which might or might not use it. + */ + ReadableStream.prototype.cancel = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('cancel')); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader')); + } + return ReadableStreamCancel(this, reason); + }; + ReadableStream.prototype.getReader = function (rawOptions) { + if (rawOptions === void 0) { rawOptions = undefined; } + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('getReader'); + } + var options = convertReaderOptions(rawOptions, 'First parameter'); + if (options.mode === undefined) { + return AcquireReadableStreamDefaultReader(this); + } + return AcquireReadableStreamBYOBReader(this); + }; + ReadableStream.prototype.pipeThrough = function (rawTransform, rawOptions) { + if (rawOptions === void 0) { rawOptions = {}; } + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('pipeThrough'); + } + assertRequiredArgument(rawTransform, 1, 'pipeThrough'); + var transform = convertReadableWritablePair(rawTransform, 'First parameter'); + var options = convertPipeOptions(rawOptions, 'Second parameter'); + if (IsReadableStreamLocked(this)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream'); + } + if (IsWritableStreamLocked(transform.writable)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream'); + } + var promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + setPromiseIsHandledToTrue(promise); + return transform.readable; + }; + ReadableStream.prototype.pipeTo = function (destination, rawOptions) { + if (rawOptions === void 0) { rawOptions = {}; } + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('pipeTo')); + } + if (destination === undefined) { + return promiseRejectedWith("Parameter 1 is required in 'pipeTo'."); + } + if (!IsWritableStream(destination)) { + return promiseRejectedWith(new TypeError("ReadableStream.prototype.pipeTo's first argument must be a WritableStream")); + } + var options; + try { + options = convertPipeOptions(rawOptions, 'Second parameter'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')); + } + if (IsWritableStreamLocked(destination)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')); + } + return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + }; + /** + * Tees this readable stream, returning a two-element array containing the two resulting branches as + * new {@link ReadableStream} instances. + * + * Teeing a stream will lock it, preventing any other consumer from acquiring a reader. + * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be + * propagated to the stream's underlying source. + * + * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable, + * this could allow interference between the two branches. + */ + ReadableStream.prototype.tee = function () { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('tee'); + } + var branches = ReadableStreamTee(this); + return CreateArrayFromList(branches); + }; + ReadableStream.prototype.values = function (rawOptions) { + if (rawOptions === void 0) { rawOptions = undefined; } + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('values'); + } + var options = convertIteratorOptions(rawOptions, 'First parameter'); + return AcquireReadableStreamAsyncIterator(this, options.preventCancel); + }; + ReadableStream.prototype[SymbolAsyncIterator] = function (options) { + // Stub implementation, overridden below + return this.values(options); + }; + /** + * Creates a new ReadableStream wrapping the provided iterable or async iterable. + * + * This can be used to adapt various kinds of objects into a readable stream, + * such as an array, an async generator, or a Node.js readable stream. + */ + ReadableStream.from = function (asyncIterable) { + return ReadableStreamFrom(asyncIterable); + }; + return ReadableStream; + }()); + Object.defineProperties(ReadableStream, { + from: { enumerable: true } + }); + Object.defineProperties(ReadableStream.prototype, { + cancel: { enumerable: true }, + getReader: { enumerable: true }, + pipeThrough: { enumerable: true }, + pipeTo: { enumerable: true }, + tee: { enumerable: true }, + values: { enumerable: true }, + locked: { enumerable: true } + }); + setFunctionName(ReadableStream.from, 'from'); + setFunctionName(ReadableStream.prototype.cancel, 'cancel'); + setFunctionName(ReadableStream.prototype.getReader, 'getReader'); + setFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough'); + setFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo'); + setFunctionName(ReadableStream.prototype.tee, 'tee'); + setFunctionName(ReadableStream.prototype.values, 'values'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStream.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStream', + configurable: true + }); + } + Object.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, { + value: ReadableStream.prototype.values, + writable: true, + configurable: true + }); + // Abstract operations for the ReadableStream. + // Throws if and only if startAlgorithm throws. + function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + if (highWaterMark === void 0) { highWaterMark = 1; } + if (sizeAlgorithm === void 0) { sizeAlgorithm = function () { return 1; }; } + var stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + var controller = Object.create(ReadableStreamDefaultController.prototype); + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + return stream; + } + // Throws if and only if startAlgorithm throws. + function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) { + var stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + var controller = Object.create(ReadableByteStreamController.prototype); + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined); + return stream; + } + function InitializeReadableStream(stream) { + stream._state = 'readable'; + stream._reader = undefined; + stream._storedError = undefined; + stream._disturbed = false; + } + function IsReadableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) { + return false; + } + return x instanceof ReadableStream; + } + function IsReadableStreamLocked(stream) { + if (stream._reader === undefined) { + return false; + } + return true; + } + // ReadableStream API exposed for controllers. + function ReadableStreamCancel(stream, reason) { + stream._disturbed = true; + if (stream._state === 'closed') { + return promiseResolvedWith(undefined); + } + if (stream._state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + ReadableStreamClose(stream); + var reader = stream._reader; + if (reader !== undefined && IsReadableStreamBYOBReader(reader)) { + var readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(function (readIntoRequest) { + readIntoRequest._closeSteps(undefined); + }); + } + var sourceCancelPromise = stream._readableStreamController[CancelSteps](reason); + return transformPromiseWith(sourceCancelPromise, noop); + } + function ReadableStreamClose(stream) { + stream._state = 'closed'; + var reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseResolve(reader); + if (IsReadableStreamDefaultReader(reader)) { + var readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(function (readRequest) { + readRequest._closeSteps(); + }); + } + } + function ReadableStreamError(stream, e) { + stream._state = 'errored'; + stream._storedError = e; + var reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseReject(reader, e); + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + else { + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } + } + // Helper functions for the ReadableStream. + function streamBrandCheckException$1(name) { + return new TypeError("ReadableStream.prototype.".concat(name, " can only be used on a ReadableStream")); + } + + function convertQueuingStrategyInit(init, context) { + assertDictionary(init, context); + var highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit'); + return { + highWaterMark: convertUnrestrictedDouble(highWaterMark) + }; + } + + // The size function must not have a prototype property nor be a constructor + var byteLengthSizeFunction = function (chunk) { + return chunk.byteLength; + }; + setFunctionName(byteLengthSizeFunction, 'size'); + /** + * A queuing strategy that counts the number of bytes in each chunk. + * + * @public + */ + var ByteLengthQueuingStrategy = /** @class */ (function () { + function ByteLengthQueuingStrategy(options) { + assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark; + } + Object.defineProperty(ByteLengthQueuingStrategy.prototype, "highWaterMark", { + /** + * Returns the high water mark provided to the constructor. + */ + get: function () { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('highWaterMark'); + } + return this._byteLengthQueuingStrategyHighWaterMark; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(ByteLengthQueuingStrategy.prototype, "size", { + /** + * Measures the size of `chunk` by returning the value of its `byteLength` property. + */ + get: function () { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('size'); + } + return byteLengthSizeFunction; + }, + enumerable: false, + configurable: true + }); + return ByteLengthQueuingStrategy; + }()); + Object.defineProperties(ByteLengthQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } + }); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ByteLengthQueuingStrategy.prototype, SymbolPolyfill.toStringTag, { + value: 'ByteLengthQueuingStrategy', + configurable: true + }); + } + // Helper functions for the ByteLengthQueuingStrategy. + function byteLengthBrandCheckException(name) { + return new TypeError("ByteLengthQueuingStrategy.prototype.".concat(name, " can only be used on a ByteLengthQueuingStrategy")); + } + function IsByteLengthQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof ByteLengthQueuingStrategy; + } + + // The size function must not have a prototype property nor be a constructor + var countSizeFunction = function () { + return 1; + }; + setFunctionName(countSizeFunction, 'size'); + /** + * A queuing strategy that counts the number of chunks. + * + * @public + */ + var CountQueuingStrategy = /** @class */ (function () { + function CountQueuingStrategy(options) { + assertRequiredArgument(options, 1, 'CountQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._countQueuingStrategyHighWaterMark = options.highWaterMark; + } + Object.defineProperty(CountQueuingStrategy.prototype, "highWaterMark", { + /** + * Returns the high water mark provided to the constructor. + */ + get: function () { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('highWaterMark'); + } + return this._countQueuingStrategyHighWaterMark; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(CountQueuingStrategy.prototype, "size", { + /** + * Measures the size of `chunk` by always returning 1. + * This ensures that the total queue size is a count of the number of chunks in the queue. + */ + get: function () { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('size'); + } + return countSizeFunction; + }, + enumerable: false, + configurable: true + }); + return CountQueuingStrategy; + }()); + Object.defineProperties(CountQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } + }); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(CountQueuingStrategy.prototype, SymbolPolyfill.toStringTag, { + value: 'CountQueuingStrategy', + configurable: true + }); + } + // Helper functions for the CountQueuingStrategy. + function countBrandCheckException(name) { + return new TypeError("CountQueuingStrategy.prototype.".concat(name, " can only be used on a CountQueuingStrategy")); + } + function IsCountQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof CountQueuingStrategy; + } + + function convertTransformer(original, context) { + assertDictionary(original, context); + var cancel = original === null || original === void 0 ? void 0 : original.cancel; + var flush = original === null || original === void 0 ? void 0 : original.flush; + var readableType = original === null || original === void 0 ? void 0 : original.readableType; + var start = original === null || original === void 0 ? void 0 : original.start; + var transform = original === null || original === void 0 ? void 0 : original.transform; + var writableType = original === null || original === void 0 ? void 0 : original.writableType; + return { + cancel: cancel === undefined ? + undefined : + convertTransformerCancelCallback(cancel, original, "".concat(context, " has member 'cancel' that")), + flush: flush === undefined ? + undefined : + convertTransformerFlushCallback(flush, original, "".concat(context, " has member 'flush' that")), + readableType: readableType, + start: start === undefined ? + undefined : + convertTransformerStartCallback(start, original, "".concat(context, " has member 'start' that")), + transform: transform === undefined ? + undefined : + convertTransformerTransformCallback(transform, original, "".concat(context, " has member 'transform' that")), + writableType: writableType + }; + } + function convertTransformerFlushCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return promiseCall(fn, original, [controller]); }; + } + function convertTransformerStartCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return reflectCall(fn, original, [controller]); }; + } + function convertTransformerTransformCallback(fn, original, context) { + assertFunction(fn, context); + return function (chunk, controller) { return promiseCall(fn, original, [chunk, controller]); }; + } + function convertTransformerCancelCallback(fn, original, context) { + assertFunction(fn, context); + return function (reason) { return promiseCall(fn, original, [reason]); }; + } + + // Class TransformStream + /** + * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream}, + * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side. + * In a manner specific to the transform stream in question, writes to the writable side result in new data being + * made available for reading from the readable side. + * + * @public + */ + var TransformStream = /** @class */ (function () { + function TransformStream(rawTransformer, rawWritableStrategy, rawReadableStrategy) { + if (rawTransformer === void 0) { rawTransformer = {}; } + if (rawWritableStrategy === void 0) { rawWritableStrategy = {}; } + if (rawReadableStrategy === void 0) { rawReadableStrategy = {}; } + if (rawTransformer === undefined) { + rawTransformer = null; + } + var writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter'); + var readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter'); + var transformer = convertTransformer(rawTransformer, 'First parameter'); + if (transformer.readableType !== undefined) { + throw new RangeError('Invalid readableType specified'); + } + if (transformer.writableType !== undefined) { + throw new RangeError('Invalid writableType specified'); + } + var readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0); + var readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy); + var writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1); + var writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy); + var startPromise_resolve; + var startPromise = newPromise(function (resolve) { + startPromise_resolve = resolve; + }); + InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + SetUpTransformStreamDefaultControllerFromTransformer(this, transformer); + if (transformer.start !== undefined) { + startPromise_resolve(transformer.start(this._transformStreamController)); + } + else { + startPromise_resolve(undefined); + } + } + Object.defineProperty(TransformStream.prototype, "readable", { + /** + * The readable side of the transform stream. + */ + get: function () { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('readable'); + } + return this._readable; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(TransformStream.prototype, "writable", { + /** + * The writable side of the transform stream. + */ + get: function () { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('writable'); + } + return this._writable; + }, + enumerable: false, + configurable: true + }); + return TransformStream; + }()); + Object.defineProperties(TransformStream.prototype, { + readable: { enumerable: true }, + writable: { enumerable: true } + }); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(TransformStream.prototype, SymbolPolyfill.toStringTag, { + value: 'TransformStream', + configurable: true + }); + } + function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) { + function startAlgorithm() { + return startPromise; + } + function writeAlgorithm(chunk) { + return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk); + } + function abortAlgorithm(reason) { + return TransformStreamDefaultSinkAbortAlgorithm(stream, reason); + } + function closeAlgorithm() { + return TransformStreamDefaultSinkCloseAlgorithm(stream); + } + stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm); + function pullAlgorithm() { + return TransformStreamDefaultSourcePullAlgorithm(stream); + } + function cancelAlgorithm(reason) { + return TransformStreamDefaultSourceCancelAlgorithm(stream, reason); + } + stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure. + stream._backpressure = undefined; + stream._backpressureChangePromise = undefined; + stream._backpressureChangePromise_resolve = undefined; + TransformStreamSetBackpressure(stream, true); + stream._transformStreamController = undefined; + } + function IsTransformStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) { + return false; + } + return x instanceof TransformStream; + } + // This is a no-op if both sides are already errored. + function TransformStreamError(stream, e) { + ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e); + TransformStreamErrorWritableAndUnblockWrite(stream, e); + } + function TransformStreamErrorWritableAndUnblockWrite(stream, e) { + TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController); + WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e); + TransformStreamUnblockWrite(stream); + } + function TransformStreamUnblockWrite(stream) { + if (stream._backpressure) { + // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure() + // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time + // _backpressure is set. + TransformStreamSetBackpressure(stream, false); + } + } + function TransformStreamSetBackpressure(stream, backpressure) { + // Passes also when called during construction. + if (stream._backpressureChangePromise !== undefined) { + stream._backpressureChangePromise_resolve(); + } + stream._backpressureChangePromise = newPromise(function (resolve) { + stream._backpressureChangePromise_resolve = resolve; + }); + stream._backpressure = backpressure; + } + // Class TransformStreamDefaultController + /** + * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}. + * + * @public + */ + var TransformStreamDefaultController = /** @class */ (function () { + function TransformStreamDefaultController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(TransformStreamDefaultController.prototype, "desiredSize", { + /** + * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full. + */ + get: function () { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('desiredSize'); + } + var readableController = this._controlledTransformStream._readable._readableStreamController; + return ReadableStreamDefaultControllerGetDesiredSize(readableController); + }, + enumerable: false, + configurable: true + }); + TransformStreamDefaultController.prototype.enqueue = function (chunk) { + if (chunk === void 0) { chunk = undefined; } + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('enqueue'); + } + TransformStreamDefaultControllerEnqueue(this, chunk); + }; + /** + * Errors both the readable side and the writable side of the controlled transform stream, making all future + * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded. + */ + TransformStreamDefaultController.prototype.error = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('error'); + } + TransformStreamDefaultControllerError(this, reason); + }; + /** + * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the + * transformer only needs to consume a portion of the chunks written to the writable side. + */ + TransformStreamDefaultController.prototype.terminate = function () { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('terminate'); + } + TransformStreamDefaultControllerTerminate(this); + }; + return TransformStreamDefaultController; + }()); + Object.defineProperties(TransformStreamDefaultController.prototype, { + enqueue: { enumerable: true }, + error: { enumerable: true }, + terminate: { enumerable: true }, + desiredSize: { enumerable: true } + }); + setFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue'); + setFunctionName(TransformStreamDefaultController.prototype.error, 'error'); + setFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate'); + if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(TransformStreamDefaultController.prototype, SymbolPolyfill.toStringTag, { + value: 'TransformStreamDefaultController', + configurable: true + }); + } + // Transform Stream Default Controller Abstract Operations + function IsTransformStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) { + return false; + } + return x instanceof TransformStreamDefaultController; + } + function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm) { + controller._controlledTransformStream = stream; + stream._transformStreamController = controller; + controller._transformAlgorithm = transformAlgorithm; + controller._flushAlgorithm = flushAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._finishPromise = undefined; + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) { + var controller = Object.create(TransformStreamDefaultController.prototype); + var transformAlgorithm; + var flushAlgorithm; + var cancelAlgorithm; + if (transformer.transform !== undefined) { + transformAlgorithm = function (chunk) { return transformer.transform(chunk, controller); }; + } + else { + transformAlgorithm = function (chunk) { + try { + TransformStreamDefaultControllerEnqueue(controller, chunk); + return promiseResolvedWith(undefined); + } + catch (transformResultE) { + return promiseRejectedWith(transformResultE); + } + }; + } + if (transformer.flush !== undefined) { + flushAlgorithm = function () { return transformer.flush(controller); }; + } + else { + flushAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (transformer.cancel !== undefined) { + cancelAlgorithm = function (reason) { return transformer.cancel(reason); }; + } + else { + cancelAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm); + } + function TransformStreamDefaultControllerClearAlgorithms(controller) { + controller._transformAlgorithm = undefined; + controller._flushAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + } + function TransformStreamDefaultControllerEnqueue(controller, chunk) { + var stream = controller._controlledTransformStream; + var readableController = stream._readable._readableStreamController; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) { + throw new TypeError('Readable side is not in a state that permits enqueue'); + } + // We throttle transform invocations based on the backpressure of the ReadableStream, but we still + // accept TransformStreamDefaultControllerEnqueue() calls. + try { + ReadableStreamDefaultControllerEnqueue(readableController, chunk); + } + catch (e) { + // This happens when readableStrategy.size() throws. + TransformStreamErrorWritableAndUnblockWrite(stream, e); + throw stream._readable._storedError; + } + var backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController); + if (backpressure !== stream._backpressure) { + TransformStreamSetBackpressure(stream, true); + } + } + function TransformStreamDefaultControllerError(controller, e) { + TransformStreamError(controller._controlledTransformStream, e); + } + function TransformStreamDefaultControllerPerformTransform(controller, chunk) { + var transformPromise = controller._transformAlgorithm(chunk); + return transformPromiseWith(transformPromise, undefined, function (r) { + TransformStreamError(controller._controlledTransformStream, r); + throw r; + }); + } + function TransformStreamDefaultControllerTerminate(controller) { + var stream = controller._controlledTransformStream; + var readableController = stream._readable._readableStreamController; + ReadableStreamDefaultControllerClose(readableController); + var error = new TypeError('TransformStream terminated'); + TransformStreamErrorWritableAndUnblockWrite(stream, error); + } + // TransformStreamDefaultSink Algorithms + function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) { + var controller = stream._transformStreamController; + if (stream._backpressure) { + var backpressureChangePromise = stream._backpressureChangePromise; + return transformPromiseWith(backpressureChangePromise, function () { + var writable = stream._writable; + var state = writable._state; + if (state === 'erroring') { + throw writable._storedError; + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + }); + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + } + function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) { + var controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + var readable = stream._readable; + // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally, + // we don't run the _cancelAlgorithm again. + controller._finishPromise = newPromise(function (resolve, reject) { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + var cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, function () { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerError(readable._readableStreamController, reason); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, function (r) { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + function TransformStreamDefaultSinkCloseAlgorithm(stream) { + var controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + var readable = stream._readable; + // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally, + // we don't also run the _cancelAlgorithm. + controller._finishPromise = newPromise(function (resolve, reject) { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + var flushPromise = controller._flushAlgorithm(); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(flushPromise, function () { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerClose(readable._readableStreamController); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, function (r) { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + // TransformStreamDefaultSource Algorithms + function TransformStreamDefaultSourcePullAlgorithm(stream) { + // Invariant. Enforced by the promises returned by start() and pull(). + TransformStreamSetBackpressure(stream, false); + // Prevent the next pull() call until there is backpressure. + return stream._backpressureChangePromise; + } + function TransformStreamDefaultSourceCancelAlgorithm(stream, reason) { + var controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._writable cannot change after construction, so caching it across a call to user code is safe. + var writable = stream._writable; + // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or + // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the + // _flushAlgorithm. + controller._finishPromise = newPromise(function (resolve, reject) { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + var cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, function () { + if (writable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, writable._storedError); + } + else { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, function (r) { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; + } + // Helper functions for the TransformStreamDefaultController. + function defaultControllerBrandCheckException(name) { + return new TypeError("TransformStreamDefaultController.prototype.".concat(name, " can only be used on a TransformStreamDefaultController")); + } + function defaultControllerFinishPromiseResolve(controller) { + if (controller._finishPromise_resolve === undefined) { + return; + } + controller._finishPromise_resolve(); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + function defaultControllerFinishPromiseReject(controller, reason) { + if (controller._finishPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(controller._finishPromise); + controller._finishPromise_reject(reason); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; + } + // Helper functions for the TransformStream. + function streamBrandCheckException(name) { + return new TypeError("TransformStream.prototype.".concat(name, " can only be used on a TransformStream")); + } + + exports.ByteLengthQueuingStrategy = ByteLengthQueuingStrategy; + exports.CountQueuingStrategy = CountQueuingStrategy; + exports.ReadableByteStreamController = ReadableByteStreamController; + exports.ReadableStream = ReadableStream; + exports.ReadableStreamBYOBReader = ReadableStreamBYOBReader; + exports.ReadableStreamBYOBRequest = ReadableStreamBYOBRequest; + exports.ReadableStreamDefaultController = ReadableStreamDefaultController; + exports.ReadableStreamDefaultReader = ReadableStreamDefaultReader; + exports.TransformStream = TransformStream; + exports.TransformStreamDefaultController = TransformStreamDefaultController; + exports.WritableStream = WritableStream; + exports.WritableStreamDefaultController = WritableStreamDefaultController; + exports.WritableStreamDefaultWriter = WritableStreamDefaultWriter; + +})); +//# sourceMappingURL=ponyfill.js.map diff --git a/node_modules/web-streams-polyfill/dist/ponyfill.js.map b/node_modules/web-streams-polyfill/dist/ponyfill.js.map new file mode 100644 index 00000000..d151897b --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/ponyfill.js.map @@ -0,0 +1 @@ +{"version":3,"file":"ponyfill.js","sources":["../src/stub/symbol.ts","../node_modules/tslib/tslib.es6.js","../src/utils.ts","../src/lib/helpers/miscellaneous.ts","../src/lib/helpers/webidl.ts","../src/lib/simple-queue.ts","../src/lib/abstract-ops/internal-methods.ts","../src/lib/readable-stream/generic-reader.ts","../src/stub/number-isfinite.ts","../src/stub/math-trunc.ts","../src/lib/validators/basic.ts","../src/lib/validators/readable-stream.ts","../src/lib/readable-stream/default-reader.ts","../src/lib/abstract-ops/ecmascript.ts","../src/target/es5/stub/async-iterator-prototype.ts","../src/lib/readable-stream/async-iterator.ts","../src/stub/number-isnan.ts","../src/lib/abstract-ops/miscellaneous.ts","../src/lib/abstract-ops/queue-with-sizes.ts","../src/lib/helpers/array-buffer-view.ts","../src/lib/readable-stream/byte-stream-controller.ts","../src/lib/validators/reader-options.ts","../src/lib/readable-stream/byob-reader.ts","../src/lib/abstract-ops/queuing-strategy.ts","../src/lib/validators/queuing-strategy.ts","../src/lib/validators/underlying-sink.ts","../src/lib/validators/writable-stream.ts","../src/lib/abort-signal.ts","../src/lib/writable-stream.ts","../src/globals.ts","../src/stub/dom-exception.ts","../src/lib/readable-stream/pipe.ts","../src/lib/readable-stream/default-controller.ts","../src/lib/readable-stream/tee.ts","../src/lib/readable-stream/readable-stream-like.ts","../src/lib/readable-stream/from.ts","../src/lib/validators/underlying-source.ts","../src/lib/validators/iterator-options.ts","../src/lib/validators/pipe-options.ts","../src/lib/validators/readable-writable-pair.ts","../src/lib/readable-stream.ts","../src/lib/validators/queuing-strategy-init.ts","../src/lib/byte-length-queuing-strategy.ts","../src/lib/count-queuing-strategy.ts","../src/lib/validators/transformer.ts","../src/lib/transform-stream.ts"],"sourcesContent":["/// \n\nconst SymbolPolyfill: (description?: string) => symbol =\n typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ?\n Symbol :\n description => `Symbol(${description})` as any as symbol;\n\nexport default SymbolPolyfill;\n","/******************************************************************************\r\nCopyright (c) Microsoft Corporation.\r\n\r\nPermission to use, copy, modify, and/or distribute this software for any\r\npurpose with or without fee is hereby granted.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\r\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY\r\nAND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\r\n***************************************************************************** */\r\n/* global Reflect, Promise, SuppressedError, Symbol */\r\n\r\nvar extendStatics = function(d, b) {\r\n extendStatics = Object.setPrototypeOf ||\r\n ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\r\n return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n if (typeof b !== \"function\" && b !== null)\r\n throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\r\n extendStatics(d, b);\r\n function __() { this.constructor = d; }\r\n d.prototype = b === null ? 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Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n function fulfill(value) { resume(\"next\", value); }\r\n function reject(value) { resume(\"throw\", value); }\r\n function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n var i, p;\r\n return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var m = o[Symbol.asyncIterator], i;\r\n return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n return cooked;\r\n};\r\n\r\nvar __setModuleDefault = Object.create ? (function(o, v) {\r\n Object.defineProperty(o, \"default\", { enumerable: true, value: v });\r\n}) : function(o, v) {\r\n o[\"default\"] = v;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n if (mod && mod.__esModule) return mod;\r\n var result = {};\r\n if (mod != null) for (var k in mod) if (k !== \"default\" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);\r\n __setModuleDefault(result, mod);\r\n return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n\r\nexport function __classPrivateFieldGet(receiver, state, kind, f) {\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a getter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot read private member from an object whose class did not declare it\");\r\n return kind === \"m\" ? f : kind === \"a\" ? f.call(receiver) : f ? f.value : state.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, state, value, kind, f) {\r\n if (kind === \"m\") throw new TypeError(\"Private method is not writable\");\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a setter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot write private member to an object whose class did not declare it\");\r\n return (kind === \"a\" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;\r\n}\r\n\r\nexport function __classPrivateFieldIn(state, receiver) {\r\n if (receiver === null || (typeof receiver !== \"object\" && typeof receiver !== \"function\")) throw new TypeError(\"Cannot use 'in' operator on non-object\");\r\n return typeof state === \"function\" ? receiver === state : state.has(receiver);\r\n}\r\n\r\nexport function __addDisposableResource(env, value, async) {\r\n if (value !== null && value !== void 0) {\r\n if (typeof value !== \"object\" && typeof value !== \"function\") throw new TypeError(\"Object expected.\");\r\n var dispose;\r\n if (async) {\r\n if (!Symbol.asyncDispose) throw new TypeError(\"Symbol.asyncDispose is not defined.\");\r\n dispose = value[Symbol.asyncDispose];\r\n }\r\n if (dispose === void 0) {\r\n if (!Symbol.dispose) throw new TypeError(\"Symbol.dispose is not defined.\");\r\n dispose = value[Symbol.dispose];\r\n }\r\n if (typeof dispose !== \"function\") throw new TypeError(\"Object not disposable.\");\r\n env.stack.push({ value: value, dispose: dispose, async: async });\r\n }\r\n else if (async) {\r\n env.stack.push({ async: true });\r\n }\r\n return value;\r\n}\r\n\r\nvar _SuppressedError = typeof SuppressedError === \"function\" ? SuppressedError : function (error, suppressed, message) {\r\n var e = new Error(message);\r\n return e.name = \"SuppressedError\", e.error = error, e.suppressed = suppressed, e;\r\n};\r\n\r\nexport function __disposeResources(env) {\r\n function fail(e) {\r\n env.error = env.hasError ? new _SuppressedError(e, env.error, \"An error was suppressed during disposal.\") : e;\r\n env.hasError = true;\r\n }\r\n function next() {\r\n while (env.stack.length) {\r\n var rec = env.stack.pop();\r\n try {\r\n var result = rec.dispose && rec.dispose.call(rec.value);\r\n if (rec.async) return Promise.resolve(result).then(next, function(e) { fail(e); return next(); });\r\n }\r\n catch (e) {\r\n fail(e);\r\n }\r\n }\r\n if (env.hasError) throw env.error;\r\n }\r\n return next();\r\n}\r\n\r\nexport default {\r\n __extends: __extends,\r\n __assign: __assign,\r\n __rest: __rest,\r\n __decorate: __decorate,\r\n __param: __param,\r\n __metadata: __metadata,\r\n __awaiter: __awaiter,\r\n __generator: __generator,\r\n __createBinding: __createBinding,\r\n __exportStar: __exportStar,\r\n __values: __values,\r\n __read: __read,\r\n __spread: __spread,\r\n __spreadArrays: __spreadArrays,\r\n __spreadArray: __spreadArray,\r\n __await: __await,\r\n __asyncGenerator: __asyncGenerator,\r\n __asyncDelegator: __asyncDelegator,\r\n __asyncValues: __asyncValues,\r\n __makeTemplateObject: __makeTemplateObject,\r\n __importStar: __importStar,\r\n __importDefault: __importDefault,\r\n __classPrivateFieldGet: __classPrivateFieldGet,\r\n __classPrivateFieldSet: __classPrivateFieldSet,\r\n __classPrivateFieldIn: __classPrivateFieldIn,\r\n __addDisposableResource: __addDisposableResource,\r\n __disposeResources: __disposeResources,\r\n};\r\n","export function noop(): undefined {\n return undefined;\n}\n","import { noop } from '../../utils';\nimport { AssertionError } from '../../stub/assert';\n\nexport function typeIsObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport const rethrowAssertionErrorRejection: (e: any) => void =\n DEBUG ? e => {\n // Used throughout the reference implementation, as `.catch(rethrowAssertionErrorRejection)`, to ensure any errors\n // get shown. There are places in the spec where we do promise transformations and purposefully ignore or don't\n // expect any errors, but assertion errors are always problematic.\n if (e && e instanceof AssertionError) {\n setTimeout(() => {\n throw e;\n }, 0);\n }\n } : noop;\n\nexport function setFunctionName(fn: Function, name: string): void {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n } catch {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n}\n","import { rethrowAssertionErrorRejection } from './miscellaneous';\nimport assert from '../../stub/assert';\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\n\n// https://webidl.spec.whatwg.org/#a-new-promise\nexport function newPromise(executor: (\n resolve: (value: T | PromiseLike) => void,\n reject: (reason?: any) => void\n) => void): Promise {\n return new originalPromise(executor);\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-resolved-with\nexport function promiseResolvedWith(value: T | PromiseLike): Promise {\n return newPromise(resolve => resolve(value));\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-rejected-with\nexport function promiseRejectedWith(reason: any): Promise {\n return originalPromiseReject(reason);\n}\n\nexport function PerformPromiseThen(\n promise: Promise,\n onFulfilled?: (value: T) => TResult1 | PromiseLike,\n onRejected?: (reason: any) => TResult2 | PromiseLike): Promise {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected) as Promise;\n}\n\n// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n// from that handler. To prevent this, return null instead of void from all handlers.\n// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\nexport function uponPromise(\n promise: Promise,\n onFulfilled?: (value: T) => null | PromiseLike,\n onRejected?: (reason: any) => null | PromiseLike): void {\n PerformPromiseThen(\n PerformPromiseThen(promise, onFulfilled, onRejected),\n undefined,\n rethrowAssertionErrorRejection\n );\n}\n\nexport function uponFulfillment(promise: Promise, onFulfilled: (value: T) => null | PromiseLike): void {\n uponPromise(promise, onFulfilled);\n}\n\nexport function uponRejection(promise: Promise, onRejected: (reason: any) => null | PromiseLike): void {\n uponPromise(promise, undefined, onRejected);\n}\n\nexport function transformPromiseWith(\n promise: Promise,\n fulfillmentHandler?: (value: T) => TResult1 | PromiseLike,\n rejectionHandler?: (reason: any) => TResult2 | PromiseLike): Promise {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\n\nexport function setPromiseIsHandledToTrue(promise: Promise): void {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\nlet _queueMicrotask: (callback: () => void) => void = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n } else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n};\n\nexport { _queueMicrotask as queueMicrotask };\n\nexport function reflectCall(F: (this: T, ...fnArgs: A) => R, V: T, args: A): R {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n}\n\nexport function promiseCall(F: (this: T, ...fnArgs: A) => R | PromiseLike,\n V: T,\n args: A): Promise {\n assert(typeof F === 'function');\n assert(V !== undefined);\n assert(Array.isArray(args));\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n } catch (value) {\n return promiseRejectedWith(value);\n }\n}\n","import assert from '../stub/assert';\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n\ninterface Node {\n _elements: T[];\n _next: Node | undefined;\n}\n\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nexport class SimpleQueue {\n private _front: Node;\n private _back: Node;\n private _cursor = 0;\n private _size = 0;\n\n constructor() {\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n\n get length(): number {\n return this._size;\n }\n\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element: T): void {\n const oldBack = this._back;\n let newBack = oldBack;\n assert(oldBack._next === undefined);\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n assert(elements.length === QUEUE_MAX_ARRAY_SIZE);\n assert(oldFront._next !== undefined);\n newFront = oldFront._next!;\n newCursor = 0;\n }\n\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined!;\n\n return element;\n }\n\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback: (element: T) => void): void {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n assert(node._next !== undefined);\n assert(i === QUEUE_MAX_ARRAY_SIZE);\n node = node._next!;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n}\n","export const AbortSteps = Symbol('[[AbortSteps]]');\nexport const ErrorSteps = Symbol('[[ErrorSteps]]');\nexport const CancelSteps = Symbol('[[CancelSteps]]');\nexport const PullSteps = Symbol('[[PullSteps]]');\nexport const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n","import assert from '../../stub/assert';\nimport { ReadableStream, ReadableStreamCancel, type ReadableStreamReader } from '../readable-stream';\nimport { newPromise, setPromiseIsHandledToTrue } from '../helpers/webidl';\nimport { ReleaseSteps } from '../abstract-ops/internal-methods';\n\nexport function ReadableStreamReaderGenericInitialize(reader: ReadableStreamReader, stream: ReadableStream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n } else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n } else {\n assert(stream._state === 'errored');\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n}\n\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\n\nexport function ReadableStreamReaderGenericCancel(reader: ReadableStreamReader, reason: any): Promise {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n return ReadableStreamCancel(stream, reason);\n}\n\nexport function ReadableStreamReaderGenericRelease(reader: ReadableStreamReader) {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n assert(stream._reader === reader);\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n } else {\n defaultReaderClosedPromiseResetToRejected(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n\n stream._readableStreamController[ReleaseSteps]();\n\n stream._reader = undefined;\n reader._ownerReadableStream = undefined!;\n}\n\n// Helper functions for the readers.\n\nexport function readerLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nexport function defaultReaderClosedPromiseInitialize(reader: ReadableStreamReader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n}\n\nexport function defaultReaderClosedPromiseInitializeAsRejected(reader: ReadableStreamReader, reason: any) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseInitializeAsResolved(reader: ReadableStreamReader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n}\n\nexport function defaultReaderClosedPromiseReject(reader: ReadableStreamReader, reason: any) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n\nexport function defaultReaderClosedPromiseResetToRejected(reader: ReadableStreamReader, reason: any) {\n assert(reader._closedPromise_resolve === undefined);\n assert(reader._closedPromise_reject === undefined);\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseResolve(reader: ReadableStreamReader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite: typeof Number.isFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n};\n\nexport default NumberIsFinite;\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc: typeof Math.trunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\nexport default MathTrunc;\n","import NumberIsFinite from '../../stub/number-isfinite';\nimport MathTrunc from '../../stub/math-trunc';\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nexport function isDictionary(x: any): x is object | null {\n return typeof x === 'object' || typeof x === 'function';\n}\n\nexport function assertDictionary(obj: unknown,\n context: string): asserts obj is object | null | undefined {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport type AnyFunction = (...args: any[]) => any;\n\n// https://heycam.github.io/webidl/#idl-callback-functions\nexport function assertFunction(x: unknown, context: string): asserts x is AnyFunction {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-object\nexport function isObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport function assertObject(x: unknown,\n context: string): asserts x is object {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport function assertRequiredArgument(x: T | undefined,\n position: number,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n}\n\nexport function assertRequiredField(x: T | undefined,\n field: string,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nexport function convertUnrestrictedDouble(value: unknown): number {\n return Number(value);\n}\n\nfunction censorNegativeZero(x: number): number {\n return x === 0 ? 0 : x;\n}\n\nfunction integerPart(x: number): number {\n return censorNegativeZero(MathTrunc(x));\n}\n\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nexport function convertUnsignedLongLongWithEnforceRange(value: unknown, context: string): number {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n\n let x = Number(value);\n x = censorNegativeZero(x);\n\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n\n x = integerPart(x);\n\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n\n return x;\n}\n","import { IsReadableStream, ReadableStream } from '../readable-stream';\n\nexport function assertReadableStream(x: unknown, context: string): asserts x is ReadableStream {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, ReadableStream } from '../readable-stream';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { PullSteps } from '../abstract-ops/internal-methods';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\n\n/**\n * A result returned by {@link ReadableStreamDefaultReader.read}.\n *\n * @public\n */\nexport type ReadableStreamDefaultReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value?: undefined;\n}\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamDefaultReader(stream: ReadableStream): ReadableStreamDefaultReader {\n return new ReadableStreamDefaultReader(stream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadRequest(stream: ReadableStream,\n readRequest: ReadRequest): void {\n assert(IsReadableStreamDefaultReader(stream._reader));\n assert(stream._state === 'readable');\n\n (stream._reader! as ReadableStreamDefaultReader)._readRequests.push(readRequest);\n}\n\nexport function ReadableStreamFulfillReadRequest(stream: ReadableStream, chunk: R | undefined, done: boolean) {\n const reader = stream._reader as ReadableStreamDefaultReader;\n\n assert(reader._readRequests.length > 0);\n\n const readRequest = reader._readRequests.shift()!;\n if (done) {\n readRequest._closeSteps();\n } else {\n readRequest._chunkSteps(chunk!);\n }\n}\n\nexport function ReadableStreamGetNumReadRequests(stream: ReadableStream): number {\n return (stream._reader as ReadableStreamDefaultReader)._readRequests.length;\n}\n\nexport function ReadableStreamHasDefaultReader(stream: ReadableStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadRequest {\n _chunkSteps(chunk: R): void;\n\n _closeSteps(): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamDefaultReader {\n /** @internal */\n _ownerReadableStream!: ReadableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(): Promise> {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamDefaultReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamDefaultReader(x: any): x is ReadableStreamDefaultReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultReader;\n}\n\nexport function ReadableStreamDefaultReaderRead(reader: ReadableStreamDefaultReader,\n readRequest: ReadRequest): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n } else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n } else {\n assert(stream._state === 'readable');\n stream._readableStreamController[PullSteps](readRequest as ReadRequest);\n }\n}\n\nexport function ReadableStreamDefaultReaderRelease(reader: ReadableStreamDefaultReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n}\n\nexport function ReadableStreamDefaultReaderErrorReadRequests(reader: ReadableStreamDefaultReader, e: any) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nfunction defaultReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n","import { reflectCall } from 'lib/helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport assert from '../../stub/assert';\n\ndeclare global {\n interface ArrayBuffer {\n readonly detached: boolean;\n\n transfer(): ArrayBuffer;\n }\n\n function structuredClone(value: T, options: { transfer: ArrayBuffer[] }): T;\n}\n\nexport function CreateArrayFromList(elements: T): T {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice() as T;\n}\n\nexport function CopyDataBlockBytes(dest: ArrayBuffer,\n destOffset: number,\n src: ArrayBuffer,\n srcOffset: number,\n n: number) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n\nexport let TransferArrayBuffer = (O: ArrayBuffer): ArrayBuffer => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n } else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n } else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n};\n\nexport function CanTransferArrayBuffer(O: ArrayBuffer): boolean {\n return !IsDetachedBuffer(O);\n}\n\nexport let IsDetachedBuffer = (O: ArrayBuffer): boolean => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n } else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n};\n\nexport function ArrayBufferSlice(buffer: ArrayBuffer, begin: number, end: number): ArrayBuffer {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n}\n\nexport type MethodName = {\n [P in keyof T]: T[P] extends Function | undefined ? P : never;\n}[keyof T];\n\nexport function GetMethod>(receiver: T, prop: K): T[K] | undefined {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n}\n\nexport interface SyncIteratorRecord {\n iterator: Iterator,\n nextMethod: Iterator['next'],\n done: boolean;\n}\n\nexport interface AsyncIteratorRecord {\n iterator: AsyncIterator,\n nextMethod: AsyncIterator['next'],\n done: boolean;\n}\n\nexport type SyncOrAsyncIteratorRecord = SyncIteratorRecord | AsyncIteratorRecord;\n\nexport function CreateAsyncFromSyncIterator(syncIteratorRecord: SyncIteratorRecord): AsyncIteratorRecord {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n}\n\n// Aligns with core-js/modules/es.symbol.async-iterator.js\nexport const SymbolAsyncIterator: (typeof Symbol)['asyncIterator'] =\n Symbol.asyncIterator ??\n Symbol.for?.('Symbol.asyncIterator') ??\n '@@asyncIterator';\n\nexport type SyncOrAsyncIterable = Iterable | AsyncIterable;\nexport type SyncOrAsyncIteratorMethod = () => (Iterator | AsyncIterator);\n\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint: 'async',\n method?: SyncOrAsyncIteratorMethod\n): AsyncIteratorRecord;\nfunction GetIterator(\n obj: Iterable,\n hint: 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncIteratorRecord;\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint = 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncOrAsyncIteratorRecord {\n assert(hint === 'sync' || hint === 'async');\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj as AsyncIterable, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj as Iterable, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj as Iterable, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n } else {\n method = GetMethod(obj as Iterable, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false } as SyncOrAsyncIteratorRecord;\n}\n\nexport { GetIterator };\n\nexport function IteratorNext(iteratorRecord: AsyncIteratorRecord): Promise> {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n}\n\nexport function IteratorComplete(\n iterResult: IteratorResult\n): iterResult is IteratorReturnResult {\n assert(typeIsObject(iterResult));\n return Boolean(iterResult.done);\n}\n\nexport function IteratorValue(iterResult: IteratorYieldResult): T {\n assert(typeIsObject(iterResult));\n return iterResult.value;\n}\n","/// \n\nimport { SymbolAsyncIterator } from '../../../lib/abstract-ops/ecmascript';\n\n// We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it.\nexport const AsyncIteratorPrototype: AsyncIterable = {\n // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( )\n // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator\n [SymbolAsyncIterator](this: AsyncIterator) {\n return this;\n }\n};\nObject.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false });\n","/// \n\nimport { ReadableStream } from '../readable-stream';\nimport {\n AcquireReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadableStreamDefaultReadResult,\n type ReadRequest\n} from './default-reader';\nimport { ReadableStreamReaderGenericCancel, ReadableStreamReaderGenericRelease } from './generic-reader';\nimport assert from '../../stub/assert';\nimport { AsyncIteratorPrototype } from '@@target/stub/async-iterator-prototype';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n queueMicrotask,\n transformPromiseWith\n} from '../helpers/webidl';\n\n/**\n * An async iterator returned by {@link ReadableStream.values}.\n *\n * @public\n */\nexport interface ReadableStreamAsyncIterator extends AsyncIterableIterator {\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nexport class ReadableStreamAsyncIteratorImpl {\n private readonly _reader: ReadableStreamDefaultReader;\n private readonly _preventCancel: boolean;\n private _ongoingPromise: Promise> | undefined = undefined;\n private _isFinished = false;\n\n constructor(reader: ReadableStreamDefaultReader, preventCancel: boolean) {\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n\n next(): Promise> {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n\n return(value: any): Promise> {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n\n private _nextSteps(): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n\n private _returnSteps(value: any): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n assert(reader._readRequests.length === 0);\n\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n}\n\ninterface ReadableStreamAsyncIteratorInstance extends ReadableStreamAsyncIterator {\n /** @interal */\n _asyncIteratorImpl: ReadableStreamAsyncIteratorImpl;\n\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nconst ReadableStreamAsyncIteratorPrototype: ReadableStreamAsyncIteratorInstance = {\n next(this: ReadableStreamAsyncIteratorInstance): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n\n return(this: ReadableStreamAsyncIteratorInstance, value: any): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n} as any;\nObject.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamAsyncIterator(stream: ReadableStream,\n preventCancel: boolean): ReadableStreamAsyncIterator {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator: ReadableStreamAsyncIteratorInstance = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n}\n\nfunction IsReadableStreamAsyncIterator(x: any): x is ReadableStreamAsyncIterator {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n\n try {\n // noinspection SuspiciousTypeOfGuard\n return (x as ReadableStreamAsyncIteratorInstance)._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n } catch {\n return false;\n }\n}\n\n// Helper functions for the ReadableStream.\n\nfunction streamAsyncIteratorBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN: typeof Number.isNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n};\n\nexport default NumberIsNaN;\n","import NumberIsNaN from '../../stub/number-isnan';\nimport { ArrayBufferSlice } from './ecmascript';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function IsNonNegativeNumber(v: number): boolean {\n if (typeof v !== 'number') {\n return false;\n }\n\n if (NumberIsNaN(v)) {\n return false;\n }\n\n if (v < 0) {\n return false;\n }\n\n return true;\n}\n\nexport function CloneAsUint8Array(O: NonShared): NonShared {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer) as NonShared;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsNonNegativeNumber } from './miscellaneous';\n\nexport interface QueueContainer {\n _queue: SimpleQueue;\n _queueTotalSize: number;\n}\n\nexport interface QueuePair {\n value: T;\n size: number;\n}\n\nexport function DequeueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.shift()!;\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n\n return pair.value;\n}\n\nexport function EnqueueValueWithSize(container: QueueContainer>, value: T, size: number) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n}\n\nexport function PeekQueueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.peek();\n return pair.value;\n}\n\nexport function ResetQueue(container: QueueContainer) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n}\n","export type TypedArray =\n | Int8Array\n | Uint8Array\n | Uint8ClampedArray\n | Int16Array\n | Uint16Array\n | Int32Array\n | Uint32Array\n | Float32Array\n | Float64Array;\n\nexport type NonShared = T & {\n buffer: ArrayBuffer;\n}\n\nexport interface ArrayBufferViewConstructor {\n new(buffer: ArrayBuffer, byteOffset: number, length?: number): T;\n\n readonly prototype: T;\n}\n\nexport interface TypedArrayConstructor extends ArrayBufferViewConstructor {\n readonly BYTES_PER_ELEMENT: number;\n}\n\nexport type DataViewConstructor = ArrayBufferViewConstructor;\n\nfunction isDataViewConstructor(ctor: Function): ctor is DataViewConstructor {\n return ctor === DataView;\n}\n\nexport function isDataView(view: ArrayBufferView): view is DataView {\n return isDataViewConstructor(view.constructor);\n}\n\nexport function arrayBufferViewElementSize(ctor: ArrayBufferViewConstructor): number {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return (ctor as unknown as TypedArrayConstructor).BYTES_PER_ELEMENT;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n IsReadableStreamDefaultReader,\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n ReadableStreamHasDefaultReader,\n type ReadRequest\n} from './default-reader';\nimport {\n ReadableStreamAddReadIntoRequest,\n ReadableStreamFulfillReadIntoRequest,\n ReadableStreamGetNumReadIntoRequests,\n ReadableStreamHasBYOBReader,\n type ReadIntoRequest\n} from './byob-reader';\nimport NumberIsInteger from '../../stub/number-isinteger';\nimport {\n IsReadableStreamLocked,\n type ReadableByteStream,\n ReadableStreamClose,\n ReadableStreamError\n} from '../readable-stream';\nimport type { ValidatedUnderlyingByteSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport {\n ArrayBufferSlice,\n CanTransferArrayBuffer,\n CopyDataBlockBytes,\n IsDetachedBuffer,\n TransferArrayBuffer\n} from '../abstract-ops/ecmascript';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\nimport { assertRequiredArgument, convertUnsignedLongLongWithEnforceRange } from '../validators/basic';\nimport {\n type ArrayBufferViewConstructor,\n arrayBufferViewElementSize,\n type NonShared,\n type TypedArrayConstructor\n} from '../helpers/array-buffer-view';\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nexport class ReadableStreamBYOBRequest {\n /** @internal */\n _associatedReadableByteStreamController!: ReadableByteStreamController;\n /** @internal */\n _view!: NonShared | null;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view(): ArrayBufferView | null {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n\n return this._view;\n }\n\n /**\n * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into\n * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer.\n *\n * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer\n * modifiable.\n */\n respond(bytesWritten: number): void;\n respond(bytesWritten: number | undefined): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(this._view!.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n\n assert(this._view!.byteLength > 0);\n assert(this._view!.buffer.byteLength > 0);\n\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n\n /**\n * Indicates to the associated readable byte stream that instead of writing into\n * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`,\n * which will be given to the consumer of the readable byte stream.\n *\n * After this method is called, `view` will be transferred and no longer modifiable.\n */\n respondWithNewView(view: ArrayBufferView): void;\n respondWithNewView(view: NonShared): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n}\n\ninterface ByteQueueElement {\n buffer: ArrayBuffer;\n byteOffset: number;\n byteLength: number;\n}\n\ntype PullIntoDescriptor = NonShared> =\n DefaultPullIntoDescriptor\n | BYOBPullIntoDescriptor;\n\ninterface DefaultPullIntoDescriptor {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: TypedArrayConstructor;\n readerType: 'default' | 'none';\n}\n\ninterface BYOBPullIntoDescriptor = NonShared> {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: ArrayBufferViewConstructor;\n readerType: 'byob' | 'none';\n}\n\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableByteStreamController {\n /** @internal */\n _controlledReadableByteStream!: ReadableByteStream;\n /** @internal */\n _queue!: SimpleQueue;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n /** @internal */\n _autoAllocateChunkSize: number | undefined;\n /** @internal */\n _byobRequest: ReadableStreamBYOBRequest | null;\n /** @internal */\n _pendingPullIntos!: SimpleQueue;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest(): ReadableStreamBYOBRequest | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n\n ReadableByteStreamControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk chunk in the controlled readable stream.\n * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown.\n */\n enqueue(chunk: ArrayBufferView): void;\n enqueue(chunk: NonShared): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n\n ReadableByteStreamControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n\n ResetQueue(this);\n\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest>): void {\n const stream = this._controlledReadableByteStream;\n assert(ReadableStreamHasDefaultReader(stream));\n\n if (this._queueTotalSize > 0) {\n assert(ReadableStreamGetNumReadRequests(stream) === 0);\n\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer: ArrayBuffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n } catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n\n const pullIntoDescriptor: DefaultPullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n}\n\nObject.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableByteStreamController.prototype.close, 'close');\nsetFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableByteStreamController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableByteStreamController.\n\nexport function IsReadableByteStreamController(x: any): x is ReadableByteStreamController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n\n return x instanceof ReadableByteStreamController;\n}\n\nfunction IsReadableStreamBYOBRequest(x: any): x is ReadableStreamBYOBRequest {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBRequest;\n}\n\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller: ReadableByteStreamController): void {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller: ReadableByteStreamController) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n}\n\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor>(\n stream: ReadableByteStream,\n pullIntoDescriptor: PullIntoDescriptor\n) {\n assert(stream._state !== 'errored');\n assert(pullIntoDescriptor.readerType !== 'none');\n\n let done = false;\n if (stream._state === 'closed') {\n assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);\n done = true;\n }\n\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView as unknown as NonShared, done);\n } else {\n assert(pullIntoDescriptor.readerType === 'byob');\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n}\n\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor>(\n pullIntoDescriptor: PullIntoDescriptor\n): T {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n\n assert(bytesFilled <= pullIntoDescriptor.byteLength);\n assert(bytesFilled % elementSize === 0);\n\n return new pullIntoDescriptor.viewConstructor(\n pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize) as T;\n}\n\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n}\n\nfunction ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n } catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n}\n\nfunction ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.readerType === 'none');\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n firstDescriptor.buffer,\n firstDescriptor.byteOffset,\n firstDescriptor.bytesFilled\n );\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n}\n\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller: ReadableByteStreamController,\n pullIntoDescriptor: PullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize,\n pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n\n const queue = controller._queue;\n\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n } else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n\n if (!ready) {\n assert(controller._queueTotalSize === 0);\n assert(pullIntoDescriptor.bytesFilled > 0);\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n }\n\n return ready;\n}\n\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller: ReadableByteStreamController,\n size: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);\n assert(controller._byobRequest === null);\n pullIntoDescriptor.bytesFilled += size;\n}\n\nfunction ReadableByteStreamControllerHandleQueueDrain(controller: ReadableByteStreamController) {\n assert(controller._controlledReadableByteStream._state === 'readable');\n\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n } else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n}\n\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller: ReadableByteStreamController) {\n if (controller._byobRequest === null) {\n return;\n }\n\n controller._byobRequest._associatedReadableByteStreamController = undefined!;\n controller._byobRequest._view = null!;\n controller._byobRequest = null;\n}\n\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller: ReadableByteStreamController) {\n assert(!controller._closeRequested);\n\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n assert(pullIntoDescriptor.readerType !== 'none');\n\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n ReadableByteStreamControllerCommitPullIntoDescriptor(\n controller._controlledReadableByteStream,\n pullIntoDescriptor\n );\n }\n }\n}\n\nfunction ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller: ReadableByteStreamController) {\n const reader = controller._controlledReadableByteStream._reader;\n assert(IsReadableStreamDefaultReader(reader));\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n}\n\nexport function ReadableByteStreamControllerPullInto>(\n controller: ReadableByteStreamController,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = controller._controlledReadableByteStream;\n\n const ctor = view.constructor as ArrayBufferViewConstructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n\n const { byteOffset, byteLength } = view;\n\n const minimumFill = min * elementSize;\n assert(minimumFill >= elementSize && minimumFill <= byteLength);\n assert(minimumFill % elementSize === 0);\n\n let buffer: ArrayBuffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n } catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n\n const pullIntoDescriptor: BYOBPullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInClosedState(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.bytesFilled % firstDescriptor.elementSize === 0);\n\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n}\n\nfunction ReadableByteStreamControllerRespondInReadableState(controller: ReadableByteStreamController,\n bytesWritten: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n pullIntoDescriptor.buffer,\n end - remainderSize,\n remainderSize\n );\n }\n\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInternal(controller: ReadableByteStreamController, bytesWritten: number) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n assert(CanTransferArrayBuffer(firstDescriptor.buffer));\n\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n assert(bytesWritten === 0);\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n } else {\n assert(state === 'readable');\n assert(bytesWritten > 0);\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerShiftPendingPullInto(\n controller: ReadableByteStreamController\n): PullIntoDescriptor {\n assert(controller._byobRequest === null);\n const descriptor = controller._pendingPullIntos.shift()!;\n return descriptor;\n}\n\nfunction ReadableByteStreamControllerShouldCallPull(controller: ReadableByteStreamController): boolean {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return false;\n }\n\n if (controller._closeRequested) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableByteStreamControllerClearAlgorithms(controller: ReadableByteStreamController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\n\nexport function ReadableByteStreamControllerClose(controller: ReadableByteStreamController) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n\n return;\n }\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n throw e;\n }\n }\n\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n}\n\nexport function ReadableByteStreamControllerEnqueue(\n controller: ReadableByteStreamController,\n chunk: NonShared\n) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError(\n 'The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk'\n );\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n assert(controller._pendingPullIntos.length === 0);\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n } else {\n assert(controller._queue.length === 0);\n if (controller._pendingPullIntos.length > 0) {\n assert(controller._pendingPullIntos.peek().readerType === 'default');\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView as NonShared, false);\n }\n } else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n } else {\n assert(!IsReadableStreamLocked(stream));\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableByteStreamControllerError(controller: ReadableByteStreamController, e: any) {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableByteStreamControllerFillReadRequestFromQueue(\n controller: ReadableByteStreamController,\n readRequest: ReadRequest>\n) {\n assert(controller._queueTotalSize > 0);\n\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view as NonShared);\n}\n\nexport function ReadableByteStreamControllerGetBYOBRequest(\n controller: ReadableByteStreamController\n): ReadableStreamBYOBRequest | null {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer,\n firstDescriptor.byteOffset + firstDescriptor.bytesFilled,\n firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n\n const byobRequest: ReadableStreamBYOBRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view as NonShared);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n}\n\nfunction ReadableByteStreamControllerGetDesiredSize(controller: ReadableByteStreamController): number | null {\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nexport function ReadableByteStreamControllerRespond(controller: ReadableByteStreamController, bytesWritten: number) {\n assert(controller._pendingPullIntos.length > 0);\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n}\n\nexport function ReadableByteStreamControllerRespondWithNewView(controller: ReadableByteStreamController,\n view: NonShared) {\n assert(controller._pendingPullIntos.length > 0);\n assert(!IsDetachedBuffer(view.buffer));\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (view.byteLength === 0) {\n throw new TypeError(\n 'The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'\n );\n }\n }\n\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n}\n\nexport function SetUpReadableByteStreamController(stream: ReadableByteStream,\n controller: ReadableByteStreamController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n autoAllocateChunkSize: number | undefined) {\n assert(stream._readableStreamController === undefined);\n if (autoAllocateChunkSize !== undefined) {\n assert(NumberIsInteger(autoAllocateChunkSize));\n assert(autoAllocateChunkSize > 0);\n }\n\n controller._controlledReadableByteStream = stream;\n\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._byobRequest = null;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._closeRequested = false;\n controller._started = false;\n\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n\n controller._pendingPullIntos = new SimpleQueue();\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableByteStreamControllerFromUnderlyingSource(\n stream: ReadableByteStream,\n underlyingByteSource: ValidatedUnderlyingByteSource,\n highWaterMark: number\n) {\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n\n SetUpReadableByteStreamController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize\n );\n}\n\nfunction SetUpReadableStreamBYOBRequest(request: ReadableStreamBYOBRequest,\n controller: ReadableByteStreamController,\n view: NonShared) {\n assert(IsReadableByteStreamController(controller));\n assert(typeof view === 'object');\n assert(ArrayBuffer.isView(view));\n assert(!IsDetachedBuffer(view.buffer));\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n}\n\n// Helper functions for the ReadableStreamBYOBRequest.\n\nfunction byobRequestBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n}\n\n// Helper functions for the ReadableByteStreamController.\n\nfunction byteStreamControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n}\n","import { assertDictionary, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from '../readable-stream/reader-options';\n\nexport function convertReaderOptions(options: ReadableStreamGetReaderOptions | null | undefined,\n context: string): ReadableStreamGetReaderOptions {\n assertDictionary(options, context);\n const mode = options?.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n}\n\nfunction convertReadableStreamReaderMode(mode: string, context: string): 'byob' {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n}\n\nexport function convertByobReadOptions(\n options: ReadableStreamBYOBReaderReadOptions | null | undefined,\n context: string\n): ValidatedReadableStreamBYOBReaderReadOptions {\n assertDictionary(options, context);\n const min = options?.min ?? 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(\n min,\n `${context} has member 'min' that`\n )\n };\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, type ReadableByteStream, type ReadableStream } from '../readable-stream';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamController,\n ReadableByteStreamControllerPullInto\n} from './byte-stream-controller';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\nimport { IsDetachedBuffer } from '../abstract-ops/ecmascript';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from './reader-options';\nimport { convertByobReadOptions } from '../validators/reader-options';\nimport { isDataView, type NonShared, type TypedArray } from '../helpers/array-buffer-view';\n\n/**\n * A result returned by {@link ReadableStreamBYOBReader.read}.\n *\n * @public\n */\nexport type ReadableStreamBYOBReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value: T | undefined;\n};\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamBYOBReader(stream: ReadableByteStream): ReadableStreamBYOBReader {\n return new ReadableStreamBYOBReader(stream as ReadableStream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadIntoRequest>(\n stream: ReadableByteStream,\n readIntoRequest: ReadIntoRequest\n): void {\n assert(IsReadableStreamBYOBReader(stream._reader));\n assert(stream._state === 'readable' || stream._state === 'closed');\n\n (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);\n}\n\nexport function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,\n chunk: ArrayBufferView,\n done: boolean) {\n const reader = stream._reader as ReadableStreamBYOBReader;\n\n assert(reader._readIntoRequests.length > 0);\n\n const readIntoRequest = reader._readIntoRequests.shift()!;\n if (done) {\n readIntoRequest._closeSteps(chunk);\n } else {\n readIntoRequest._chunkSteps(chunk);\n }\n}\n\nexport function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {\n return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;\n}\n\nexport function ReadableStreamHasBYOBReader(stream: ReadableByteStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadIntoRequest> {\n _chunkSteps(chunk: T): void;\n\n _closeSteps(chunk: T | undefined): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamBYOBReader {\n /** @internal */\n _ownerReadableStream!: ReadableByteStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readIntoRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readIntoRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Attempts to reads bytes into view, and returns a promise resolved with the result.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(\n view: T,\n options?: ReadableStreamBYOBReaderReadOptions\n ): Promise>;\n read>(\n view: T,\n rawOptions: ReadableStreamBYOBReaderReadOptions | null | undefined = {}\n ): Promise> {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n\n let options: ValidatedReadableStreamBYOBReaderReadOptions;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > (view as unknown as TypedArray).length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n } else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamBYOBReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest: ReadIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamBYOBReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBReader;\n}\n\nexport function ReadableStreamBYOBReaderRead>(\n reader: ReadableStreamBYOBReader,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n } else {\n ReadableByteStreamControllerPullInto(\n stream._readableStreamController as ReadableByteStreamController,\n view,\n min,\n readIntoRequest\n );\n }\n}\n\nexport function ReadableStreamBYOBReaderRelease(reader: ReadableStreamBYOBReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n}\n\nexport function ReadableStreamBYOBReaderErrorReadIntoRequests(reader: ReadableStreamBYOBReader, e: any) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamBYOBReader.\n\nfunction byobReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport NumberIsNaN from '../../stub/number-isnan';\n\nexport function ExtractHighWaterMark(strategy: QueuingStrategy, defaultHWM: number): number {\n const { highWaterMark } = strategy;\n\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n\n return highWaterMark;\n}\n\nexport function ExtractSizeAlgorithm(strategy: QueuingStrategy): QueuingStrategySizeCallback {\n const { size } = strategy;\n\n if (!size) {\n return () => 1;\n }\n\n return size;\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport { assertDictionary, assertFunction, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategy(init: QueuingStrategy | null | undefined,\n context: string): QueuingStrategy {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n const size = init?.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n}\n\nfunction convertQueuingStrategySize(fn: QueuingStrategySizeCallback,\n context: string): QueuingStrategySizeCallback {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from '../writable-stream/underlying-sink';\nimport { WritableStreamDefaultController } from '../writable-stream';\n\nexport function convertUnderlyingSink(original: UnderlyingSink | null,\n context: string): ValidatedUnderlyingSink {\n assertDictionary(original, context);\n const abort = original?.abort;\n const close = original?.close;\n const start = original?.start;\n const type = original?.type;\n const write = original?.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original!, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original!, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original!, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original!, `${context} has member 'write' that`),\n type\n };\n}\n\nfunction convertUnderlyingSinkAbortCallback(\n fn: UnderlyingSinkAbortCallback,\n original: UnderlyingSink,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSinkCloseCallback(\n fn: UnderlyingSinkCloseCallback,\n original: UnderlyingSink,\n context: string\n): () => Promise {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n}\n\nfunction convertUnderlyingSinkStartCallback(\n fn: UnderlyingSinkStartCallback,\n original: UnderlyingSink,\n context: string\n): UnderlyingSinkStartCallback {\n assertFunction(fn, context);\n return (controller: WritableStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSinkWriteCallback(\n fn: UnderlyingSinkWriteCallback,\n original: UnderlyingSink,\n context: string\n): (chunk: W, controller: WritableStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: W, controller: WritableStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n","import { IsWritableStream, WritableStream } from '../writable-stream';\n\nexport function assertWritableStream(x: unknown, context: string): asserts x is WritableStream {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n}\n","/**\n * A signal object that allows you to communicate with a request and abort it if required\n * via its associated `AbortController` object.\n *\n * @remarks\n * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @public\n */\nexport interface AbortSignal {\n /**\n * Whether the request is aborted.\n */\n readonly aborted: boolean;\n\n /**\n * If aborted, returns the reason for aborting.\n */\n readonly reason?: any;\n\n /**\n * Add an event listener to be triggered when this signal becomes aborted.\n */\n addEventListener(type: 'abort', listener: () => void): void;\n\n /**\n * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}.\n */\n removeEventListener(type: 'abort', listener: () => void): void;\n}\n\nexport function isAbortSignal(value: unknown): value is AbortSignal {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof (value as AbortSignal).aborted === 'boolean';\n } catch {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n}\n\n/**\n * A controller object that allows you to abort an `AbortSignal` when desired.\n *\n * @remarks\n * This interface is compatible with the `AbortController` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @internal\n */\nexport interface AbortController {\n readonly signal: AbortSignal;\n\n abort(reason?: any): void;\n}\n\ninterface AbortControllerConstructor {\n new(): AbortController;\n}\n\nconst supportsAbortController = typeof (AbortController as any) === 'function';\n\n/**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\nexport function createAbortController(): AbortController | undefined {\n if (supportsAbortController) {\n return new (AbortController as AbortControllerConstructor)();\n }\n return undefined;\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponPromise\n} from './helpers/webidl';\nimport {\n DequeueValue,\n EnqueueValueWithSize,\n PeekQueueValue,\n type QueuePair,\n ResetQueue\n} from './abstract-ops/queue-with-sizes';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { SimpleQueue } from './simple-queue';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { AbortSteps, ErrorSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from './writable-stream/underlying-sink';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertUnderlyingSink } from './validators/underlying-sink';\nimport { assertWritableStream } from './validators/writable-stream';\nimport { type AbortController, type AbortSignal, createAbortController } from './abort-signal';\n\ntype WritableStreamState = 'writable' | 'closed' | 'erroring' | 'errored';\n\ninterface WriteOrCloseRequest {\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n}\n\ntype WriteRequest = WriteOrCloseRequest;\ntype CloseRequest = WriteOrCloseRequest;\n\ninterface PendingAbortRequest {\n _promise: Promise;\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n _reason: any;\n _wasAlreadyErroring: boolean;\n}\n\n/**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\nclass WritableStream {\n /** @internal */\n _state!: WritableStreamState;\n /** @internal */\n _storedError: any;\n /** @internal */\n _writer: WritableStreamDefaultWriter | undefined;\n /** @internal */\n _writableStreamController!: WritableStreamDefaultController;\n /** @internal */\n _writeRequests!: SimpleQueue;\n /** @internal */\n _inFlightWriteRequest: WriteRequest | undefined;\n /** @internal */\n _closeRequest: CloseRequest | undefined;\n /** @internal */\n _inFlightCloseRequest: CloseRequest | undefined;\n /** @internal */\n _pendingAbortRequest: PendingAbortRequest | undefined;\n /** @internal */\n _backpressure!: boolean;\n\n constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSink: UnderlyingSink | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n } else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n\n InitializeWritableStream(this);\n\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked(): boolean {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsWritableStreamLocked(this);\n }\n\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('abort'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n\n return WritableStreamAbort(this, reason);\n }\n\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('close'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamClose(this);\n }\n\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter(): WritableStreamDefaultWriter {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('getWriter');\n }\n\n return AcquireWritableStreamDefaultWriter(this);\n }\n}\n\nObject.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(WritableStream.prototype.abort, 'abort');\nsetFunctionName(WritableStream.prototype.close, 'close');\nsetFunctionName(WritableStream.prototype.getWriter, 'getWriter');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n}\n\nexport {\n AcquireWritableStreamDefaultWriter,\n CreateWritableStream,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamDefaultControllerErrorIfNeeded,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite,\n WritableStreamCloseQueuedOrInFlight\n};\n\nexport type {\n UnderlyingSink,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkAbortCallback\n};\n\n// Abstract operations for the WritableStream.\n\nfunction AcquireWritableStreamDefaultWriter(stream: WritableStream): WritableStreamDefaultWriter {\n return new WritableStreamDefaultWriter(stream);\n}\n\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: WritableStream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n\n const controller: WritableStreamDefaultController = Object.create(WritableStreamDefaultController.prototype);\n\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm,\n abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n}\n\nfunction InitializeWritableStream(stream: WritableStream) {\n stream._state = 'writable';\n\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n\n stream._writer = undefined;\n\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined!;\n\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n}\n\nfunction IsWritableStream(x: unknown): x is WritableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n\n return x instanceof WritableStream;\n}\n\nfunction IsWritableStreamLocked(stream: WritableStream): boolean {\n assert(IsWritableStream(stream));\n\n if (stream._writer === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamAbort(stream: WritableStream, reason: any): Promise {\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n stream._writableStreamController._abortController?.abort(reason);\n\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state as WritableStreamState;\n\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined!,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest!._promise = promise;\n\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n\n return promise;\n}\n\nfunction WritableStreamClose(stream: WritableStream): Promise {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(\n `The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n\n assert(state === 'writable' || state === 'erroring');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const promise = newPromise((resolve, reject) => {\n const closeRequest: CloseRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._closeRequest = closeRequest;\n });\n\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n\n return promise;\n}\n\n// WritableStream API exposed for controllers.\n\nfunction WritableStreamAddWriteRequest(stream: WritableStream): Promise {\n assert(IsWritableStreamLocked(stream));\n assert(stream._state === 'writable');\n\n const promise = newPromise((resolve, reject) => {\n const writeRequest: WriteRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._writeRequests.push(writeRequest);\n });\n\n return promise;\n}\n\nfunction WritableStreamDealWithRejection(stream: WritableStream, error: any) {\n const state = stream._state;\n\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n\n assert(state === 'erroring');\n WritableStreamFinishErroring(stream);\n}\n\nfunction WritableStreamStartErroring(stream: WritableStream, reason: any) {\n assert(stream._storedError === undefined);\n assert(stream._state === 'writable');\n\n const controller = stream._writableStreamController;\n assert(controller !== undefined);\n\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n}\n\nfunction WritableStreamFinishErroring(stream: WritableStream) {\n assert(stream._state === 'erroring');\n assert(!WritableStreamHasOperationMarkedInFlight(stream));\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(\n promise,\n () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n },\n (reason: any) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n}\n\nfunction WritableStreamFinishInFlightWrite(stream: WritableStream) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n}\n\nfunction WritableStreamFinishInFlightWriteWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._reject(error);\n stream._inFlightWriteRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n WritableStreamDealWithRejection(stream, error);\n}\n\nfunction WritableStreamFinishInFlightClose(stream: WritableStream) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n\n const state = stream._state;\n\n assert(state === 'writable' || state === 'erroring');\n\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n\n stream._state = 'closed';\n\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n\n assert(stream._pendingAbortRequest === undefined);\n assert(stream._storedError === undefined);\n}\n\nfunction WritableStreamFinishInFlightCloseWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._reject(error);\n stream._inFlightCloseRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n}\n\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream: WritableStream): boolean {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamHasOperationMarkedInFlight(stream: WritableStream): boolean {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamMarkCloseRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightCloseRequest === undefined);\n assert(stream._closeRequest !== undefined);\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n}\n\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightWriteRequest === undefined);\n assert(stream._writeRequests.length !== 0);\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\n\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream: WritableStream) {\n assert(stream._state === 'errored');\n if (stream._closeRequest !== undefined) {\n assert(stream._inFlightCloseRequest === undefined);\n\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n}\n\nfunction WritableStreamUpdateBackpressure(stream: WritableStream, backpressure: boolean) {\n assert(stream._state === 'writable');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n } else {\n assert(!backpressure);\n\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n\n stream._backpressure = backpressure;\n}\n\n/**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\nexport class WritableStreamDefaultWriter {\n /** @internal */\n _ownerWritableStream: WritableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _closedPromiseState!: 'pending' | 'resolved' | 'rejected';\n /** @internal */\n _readyPromise!: Promise;\n /** @internal */\n _readyPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _readyPromise_reject?: (reason: any) => void;\n /** @internal */\n _readyPromiseState!: 'pending' | 'fulfilled' | 'rejected';\n\n constructor(stream: WritableStream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n\n this._ownerWritableStream = stream;\n stream._writer = this;\n\n const state = stream._state;\n\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n } else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n } else {\n assert(state === 'errored');\n\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize(): number | null {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n\n return this._readyPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamDefaultWriterClose(this);\n }\n\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock(): void {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return;\n }\n\n assert(stream._writer !== undefined);\n\n WritableStreamDefaultWriterRelease(this);\n }\n\n /**\n * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully,\n * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return\n * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes\n * errored before the writing process is initiated.\n *\n * Note that what \"success\" means is up to the underlying sink; it might indicate simply that the chunk has been\n * accepted, and not necessarily that it is safely saved to its ultimate destination.\n */\n write(chunk: W): Promise;\n write(chunk: W = undefined!): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n});\nsetFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\nsetFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\nsetFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\nsetFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n}\n\n// Abstract operations for the WritableStreamDefaultWriter.\n\nfunction IsWritableStreamDefaultWriter(x: any): x is WritableStreamDefaultWriter {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultWriter;\n}\n\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultWriterAbort(writer: WritableStreamDefaultWriter, reason: any) {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamAbort(stream, reason);\n}\n\nfunction WritableStreamDefaultWriterClose(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamClose(stream);\n}\n\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n return WritableStreamDefaultWriterClose(writer);\n}\n\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n } else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n } else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterGetDesiredSize(writer: WritableStreamDefaultWriter): number | null {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n\n if (state === 'closed') {\n return 0;\n }\n\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\n\nfunction WritableStreamDefaultWriterRelease(writer: WritableStreamDefaultWriter) {\n const stream = writer._ownerWritableStream;\n assert(stream !== undefined);\n assert(stream._writer === writer);\n\n const releasedError = new TypeError(\n `Writer was released and can no longer be used to monitor the stream's closedness`);\n\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n\n stream._writer = undefined;\n writer._ownerWritableStream = undefined!;\n}\n\nfunction WritableStreamDefaultWriterWrite(writer: WritableStreamDefaultWriter, chunk: W): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const controller = stream._writableStreamController;\n\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable');\n\n const promise = WritableStreamAddWriteRequest(stream);\n\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n\n return promise;\n}\n\nconst closeSentinel: unique symbol = {} as any;\n\ntype QueueRecord = W | typeof closeSentinel;\n\n/**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\nexport class WritableStreamDefaultController {\n /** @internal */\n _controlledWritableStream!: WritableStream;\n /** @internal */\n _queue!: SimpleQueue>>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _abortReason: any;\n /** @internal */\n _abortController: AbortController | undefined;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _writeAlgorithm!: (chunk: W) => Promise;\n /** @internal */\n _closeAlgorithm!: () => Promise;\n /** @internal */\n _abortAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason(): any {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('abortReason');\n }\n return this._abortReason;\n }\n\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal(): AbortSignal {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e: any = undefined): void {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n\n WritableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [AbortSteps](reason: any): Promise {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations implementing interface required by the WritableStream.\n\nfunction IsWritableStreamDefaultController(x: any): x is WritableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultController;\n}\n\nfunction SetUpWritableStreamDefaultController(stream: WritableStream,\n controller: WritableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(IsWritableStream(stream));\n assert(stream._writableStreamController === undefined);\n\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(\n startPromise,\n () => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n r => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n }\n );\n}\n\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream: WritableStream,\n underlyingSink: ValidatedUnderlyingSink,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let writeAlgorithm: (chunk: W) => Promise;\n let closeAlgorithm: () => Promise;\n let abortAlgorithm: (reason: any) => Promise;\n\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write!(chunk, controller);\n } else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close!();\n } else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort!(reason);\n } else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpWritableStreamDefaultController(\n stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\nfunction WritableStreamDefaultControllerClearAlgorithms(controller: WritableStreamDefaultController) {\n controller._writeAlgorithm = undefined!;\n controller._closeAlgorithm = undefined!;\n controller._abortAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\nfunction WritableStreamDefaultControllerClose(controller: WritableStreamDefaultController) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\nfunction WritableStreamDefaultControllerGetChunkSize(controller: WritableStreamDefaultController,\n chunk: W): number {\n try {\n return controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n}\n\nfunction WritableStreamDefaultControllerGetDesiredSize(controller: WritableStreamDefaultController): number {\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nfunction WritableStreamDefaultControllerWrite(controller: WritableStreamDefaultController,\n chunk: W,\n chunkSize: number) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\n// Abstract operations for the WritableStreamDefaultController.\n\nfunction WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n if (!controller._started) {\n return;\n }\n\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n\n const state = stream._state;\n assert(state !== 'closed' && state !== 'errored');\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n\n if (controller._queue.length === 0) {\n return;\n }\n\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n } else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n}\n\nfunction WritableStreamDefaultControllerErrorIfNeeded(controller: WritableStreamDefaultController, error: any) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n}\n\nfunction WritableStreamDefaultControllerProcessClose(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkCloseRequestInFlight(stream);\n\n DequeueValue(controller);\n assert(controller._queue.length === 0);\n\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(\n sinkClosePromise,\n () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n },\n reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerProcessWrite(controller: WritableStreamDefaultController, chunk: W) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(\n sinkWritePromise,\n () => {\n WritableStreamFinishInFlightWrite(stream);\n\n const state = stream._state;\n assert(state === 'writable' || state === 'erroring');\n\n DequeueValue(controller);\n\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerGetBackpressure(controller: WritableStreamDefaultController): boolean {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n}\n\n// A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultControllerError(controller: WritableStreamDefaultController, error: any) {\n const stream = controller._controlledWritableStream;\n\n assert(stream._state === 'writable');\n\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n}\n\n// Helper functions for the WritableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n}\n\n// Helper functions for the WritableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n}\n\n\n// Helper functions for the WritableStreamDefaultWriter.\n\nfunction defaultWriterBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n}\n\nfunction defaultWriterLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n}\n\nfunction defaultWriterClosedPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n}\n\nfunction defaultWriterClosedPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n}\n\nfunction defaultWriterClosedPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n}\n\nfunction defaultWriterClosedPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._closedPromise_resolve === undefined);\n assert(writer._closedPromise_reject === undefined);\n assert(writer._closedPromiseState !== 'pending');\n\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n}\n\nfunction defaultWriterReadyPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n}\n\nfunction defaultWriterReadyPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n}\n\nfunction defaultWriterReadyPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n}\n\nfunction defaultWriterReadyPromiseReset(writer: WritableStreamDefaultWriter) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitialize(writer);\n}\n\nfunction defaultWriterReadyPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n}\n","/// \n\nfunction getGlobals(): typeof globalThis | undefined {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n } else if (typeof self !== 'undefined') {\n return self;\n } else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n}\n\nexport const globals = getGlobals();\n","/// \nimport { globals } from '../globals';\nimport { setFunctionName } from '../lib/helpers/miscellaneous';\n\ninterface DOMException extends Error {\n name: string;\n message: string;\n}\n\ntype DOMExceptionConstructor = new (message?: string, name?: string) => DOMException;\n\nfunction isDOMExceptionConstructor(ctor: unknown): ctor is DOMExceptionConstructor {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if ((ctor as DOMExceptionConstructor).name !== 'DOMException') {\n return false;\n }\n try {\n new (ctor as DOMExceptionConstructor)();\n return true;\n } catch {\n return false;\n }\n}\n\n/**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\nfunction getFromGlobal(): DOMExceptionConstructor | undefined {\n const ctor = globals?.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n}\n\n/**\n * Support:\n * - All platforms\n */\nfunction createPolyfill(): DOMExceptionConstructor {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(this: DOMException, message?: string, name?: string) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n } as any;\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-redeclare\nconst DOMException: DOMExceptionConstructor = getFromGlobal() || createPolyfill();\n\nexport { DOMException };\n","import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';\nimport { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireWritableStreamDefaultWriter,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamCloseQueuedOrInFlight,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite\n} from '../writable-stream';\nimport assert from '../../stub/assert';\nimport {\n newPromise,\n PerformPromiseThen,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponFulfillment,\n uponPromise,\n uponRejection\n} from '../helpers/webidl';\nimport { noop } from '../../utils';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\nimport { DOMException } from '../../stub/dom-exception';\n\nexport function ReadableStreamPipeTo(source: ReadableStream,\n dest: WritableStream,\n preventClose: boolean,\n preventAbort: boolean,\n preventCancel: boolean,\n signal: AbortSignal | undefined): Promise {\n assert(IsReadableStream(source));\n assert(IsWritableStream(dest));\n assert(typeof preventClose === 'boolean');\n assert(typeof preventAbort === 'boolean');\n assert(typeof preventCancel === 'boolean');\n assert(signal === undefined || isAbortSignal(signal));\n assert(!IsReadableStreamLocked(source));\n assert(!IsWritableStreamLocked(dest));\n\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n\n source._disturbed = true;\n\n let shuttingDown = false;\n\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n\n return newPromise((resolve, reject) => {\n let abortAlgorithm: () => void;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions: Array<() => Promise> = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n\n signal.addEventListener('abort', abortAlgorithm);\n }\n\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done: boolean) {\n if (done) {\n resolveLoop();\n } else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n\n next(false);\n });\n }\n\n function pipeStep(): Promise {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(\n reader,\n {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n }\n );\n });\n });\n }\n\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n } else {\n shutdown();\n }\n return null;\n });\n\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n } else {\n shutdown(true, destClosed);\n }\n }\n\n setPromiseIsHandledToTrue(pipeLoop());\n\n function waitForWritesToFinish(): Promise {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(\n currentWrite,\n () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined\n );\n }\n\n function isOrBecomesErrored(stream: ReadableStream | WritableStream,\n promise: Promise,\n action: (reason: any) => null) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n } else {\n uponRejection(promise, action);\n }\n }\n\n function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise, action: () => null) {\n if (stream._state === 'closed') {\n action();\n } else {\n uponFulfillment(promise, action);\n }\n }\n\n function shutdownWithAction(action: () => Promise, originalIsError?: boolean, originalError?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n } else {\n doTheRest();\n }\n\n function doTheRest(): null {\n uponPromise(\n action(),\n () => finalize(originalIsError, originalError),\n newError => finalize(true, newError)\n );\n return null;\n }\n }\n\n function shutdown(isError?: boolean, error?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n } else {\n finalize(isError, error);\n }\n }\n\n function finalize(isError?: boolean, error?: any): null {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n } else {\n resolve(undefined);\n }\n\n return null;\n }\n });\n}\n","import type { QueuingStrategySizeCallback } from '../queuing-strategy';\nimport assert from '../../stub/assert';\nimport { DequeueValue, EnqueueValueWithSize, type QueuePair, ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n type ReadRequest\n} from './default-reader';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsReadableStreamLocked, ReadableStream, ReadableStreamClose, ReadableStreamError } from '../readable-stream';\nimport type { ValidatedUnderlyingSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\n\n/**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableStreamDefaultController {\n /** @internal */\n _controlledReadableStream!: ReadableStream;\n /** @internal */\n _queue!: SimpleQueue>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('close');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n\n ReadableStreamDefaultControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the controlled readable stream.\n */\n enqueue(chunk: R): void;\n enqueue(chunk: R = undefined!): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n ReadableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest): void {\n const stream = this._controlledReadableStream;\n\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n } else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n\n readRequest._chunkSteps(chunk);\n } else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n // Do nothing.\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\nsetFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableStreamDefaultController.\n\nfunction IsReadableStreamDefaultController(x: any): x is ReadableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultController;\n}\n\nfunction ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController): void {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController): boolean {\n const stream = controller._controlledReadableStream;\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\n// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n\nexport function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n controller._closeRequested = true;\n\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n}\n\nexport function ReadableStreamDefaultControllerEnqueue(\n controller: ReadableStreamDefaultController,\n chunk: R\n): void {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n } else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController, e: any) {\n const stream = controller._controlledReadableStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ResetQueue(controller);\n\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableStreamDefaultControllerGetDesiredSize(\n controller: ReadableStreamDefaultController\n): number | null {\n const state = controller._controlledReadableStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\n// This is used in the implementation of TransformStream.\nexport function ReadableStreamDefaultControllerHasBackpressure(\n controller: ReadableStreamDefaultController\n): boolean {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n\n return true;\n}\n\nexport function ReadableStreamDefaultControllerCanCloseOrEnqueue(\n controller: ReadableStreamDefaultController\n): boolean {\n const state = controller._controlledReadableStream._state;\n\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n\n return false;\n}\n\nexport function SetUpReadableStreamDefaultController(stream: ReadableStream,\n controller: ReadableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(stream._readableStreamController === undefined);\n\n controller._controlledReadableStream = stream;\n\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n stream: ReadableStream,\n underlyingSource: ValidatedUnderlyingSource,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback\n) {\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// Helper functions for the ReadableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n}\n","import {\n CreateReadableByteStream,\n CreateReadableStream,\n type DefaultReadableStream,\n IsReadableStream,\n type ReadableByteStream,\n ReadableStream,\n ReadableStreamCancel,\n type ReadableStreamReader\n} from '../readable-stream';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadRequest\n} from './default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReaderRead,\n type ReadIntoRequest\n} from './byob-reader';\nimport assert from '../../stub/assert';\nimport { newPromise, promiseResolvedWith, queueMicrotask, uponRejection } from '../helpers/webidl';\nimport {\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError\n} from './default-controller';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamControllerClose,\n ReadableByteStreamControllerEnqueue,\n ReadableByteStreamControllerError,\n ReadableByteStreamControllerGetBYOBRequest,\n ReadableByteStreamControllerRespond,\n ReadableByteStreamControllerRespondWithNewView\n} from './byte-stream-controller';\nimport { CreateArrayFromList } from '../abstract-ops/ecmascript';\nimport { CloneAsUint8Array } from '../abstract-ops/miscellaneous';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function ReadableStreamTee(stream: ReadableStream,\n cloneForBranch2: boolean): [ReadableStream, ReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream as unknown as ReadableByteStream) as\n unknown as [ReadableStream, ReadableStream];\n }\n return ReadableStreamDefaultTee(stream, cloneForBranch2);\n}\n\nexport function ReadableStreamDefaultTee(\n stream: ReadableStream,\n cloneForBranch2: boolean\n): [DefaultReadableStream, DefaultReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n\n const reader = AcquireReadableStreamDefaultReader(stream);\n\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: DefaultReadableStream;\n let branch2: DefaultReadableStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function pullAlgorithm(): Promise {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm() {\n // do nothing\n }\n\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n\n uponRejection(reader._closedPromise, (r: any) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n\n return [branch1, branch2];\n}\n\nexport function ReadableByteStreamTee(stream: ReadableByteStream): [ReadableByteStream, ReadableByteStream] {\n assert(IsReadableStream(stream));\n assert(IsReadableByteStreamController(stream._readableStreamController));\n\n let reader: ReadableStreamReader> = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: ReadableByteStream;\n let branch2: ReadableByteStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function forwardReaderError(thisReader: ReadableStreamReader>) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n assert(reader._readIntoRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n\n const readRequest: ReadRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n\n function pullWithBYOBReader(view: NonShared, forBranch2: boolean) {\n if (IsReadableStreamDefaultReader>(reader)) {\n assert(reader._readRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n\n const readIntoRequest: ReadIntoRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n } else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n\n if (chunk !== undefined) {\n assert(chunk.byteLength === 0);\n\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n\n function pull1Algorithm(): Promise {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, false);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function pull2Algorithm(): Promise {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, true);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm(): void {\n return;\n }\n\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n\n forwardReaderError(reader);\n\n return [branch1, branch2];\n}\n","import { typeIsObject } from '../helpers/miscellaneous';\nimport type { ReadableStreamDefaultReadResult } from './default-reader';\n\n/**\n * A common interface for a `ReadadableStream` implementation.\n *\n * @public\n */\nexport interface ReadableStreamLike {\n readonly locked: boolean;\n\n getReader(): ReadableStreamDefaultReaderLike;\n}\n\n/**\n * A common interface for a `ReadableStreamDefaultReader` implementation.\n *\n * @public\n */\nexport interface ReadableStreamDefaultReaderLike {\n readonly closed: Promise;\n\n cancel(reason?: any): Promise;\n\n read(): Promise>;\n\n releaseLock(): void;\n}\n\nexport function isReadableStreamLike(stream: unknown): stream is ReadableStreamLike {\n return typeIsObject(stream) && typeof (stream as ReadableStreamLike).getReader !== 'undefined';\n}\n","import { CreateReadableStream, type DefaultReadableStream } from '../readable-stream';\nimport {\n isReadableStreamLike,\n type ReadableStreamDefaultReaderLike,\n type ReadableStreamLike\n} from './readable-stream-like';\nimport { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue } from './default-controller';\nimport { GetIterator, GetMethod, IteratorComplete, IteratorNext, IteratorValue } from '../abstract-ops/ecmascript';\nimport { promiseRejectedWith, promiseResolvedWith, reflectCall, transformPromiseWith } from '../helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport { noop } from '../../utils';\n\nexport function ReadableStreamFrom(\n source: Iterable | AsyncIterable | ReadableStreamLike\n): DefaultReadableStream {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n}\n\nexport function ReadableStreamFromIterable(asyncIterable: Iterable | AsyncIterable): DefaultReadableStream {\n let stream: DefaultReadableStream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n const iterator = iteratorRecord.iterator;\n let returnMethod: (typeof iterator)['return'] | undefined;\n try {\n returnMethod = GetMethod(iterator, 'return');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult: IteratorResult | Promise>;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n\nexport function ReadableStreamFromDefaultReader(\n reader: ReadableStreamDefaultReaderLike\n): DefaultReadableStream {\n let stream: DefaultReadableStream;\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let readPromise;\n try {\n readPromise = reader.read();\n } catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n } catch (e) {\n return promiseRejectedWith(e);\n }\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n","import { assertDictionary, assertFunction, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamController,\n UnderlyingByteSource,\n UnderlyingDefaultOrByteSource,\n UnderlyingDefaultOrByteSourcePullCallback,\n UnderlyingDefaultOrByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n ValidatedUnderlyingDefaultOrByteSource\n} from '../readable-stream/underlying-source';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\n\nexport function convertUnderlyingDefaultOrByteSource(\n source: UnderlyingSource | UnderlyingByteSource | null,\n context: string\n): ValidatedUnderlyingDefaultOrByteSource {\n assertDictionary(source, context);\n const original = source as (UnderlyingDefaultOrByteSource | null);\n const autoAllocateChunkSize = original?.autoAllocateChunkSize;\n const cancel = original?.cancel;\n const pull = original?.pull;\n const start = original?.start;\n const type = original?.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(\n autoAllocateChunkSize,\n `${context} has member 'autoAllocateChunkSize' that`\n ),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original!, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original!, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n}\n\nfunction convertUnderlyingSourceCancelCallback(\n fn: UnderlyingSourceCancelCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSourcePullCallback(\n fn: UnderlyingDefaultOrByteSourcePullCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (controller: ReadableStreamController) => Promise {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSourceStartCallback(\n fn: UnderlyingDefaultOrByteSourceStartCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): UnderlyingDefaultOrByteSourceStartCallback {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertReadableStreamType(type: string, context: string): 'bytes' {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n}\n","import { assertDictionary } from './basic';\nimport type {\n ReadableStreamIteratorOptions,\n ValidatedReadableStreamIteratorOptions\n} from '../readable-stream/iterator-options';\n\nexport function convertIteratorOptions(options: ReadableStreamIteratorOptions | null | undefined,\n context: string): ValidatedReadableStreamIteratorOptions {\n assertDictionary(options, context);\n const preventCancel = options?.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n}\n","import { assertDictionary } from './basic';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from '../readable-stream/pipe-options';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\n\nexport function convertPipeOptions(options: StreamPipeOptions | null | undefined,\n context: string): ValidatedStreamPipeOptions {\n assertDictionary(options, context);\n const preventAbort = options?.preventAbort;\n const preventCancel = options?.preventCancel;\n const preventClose = options?.preventClose;\n const signal = options?.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n}\n\nfunction assertAbortSignal(signal: unknown, context: string): asserts signal is AbortSignal {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n}\n","import { assertDictionary, assertRequiredField } from './basic';\nimport { ReadableStream } from '../readable-stream';\nimport { WritableStream } from '../writable-stream';\nimport { assertReadableStream } from './readable-stream';\nimport { assertWritableStream } from './writable-stream';\n\nexport function convertReadableWritablePair(\n pair: { readable: RS; writable: WS } | null | undefined,\n context: string\n): { readable: RS; writable: WS } {\n assertDictionary(pair, context);\n\n const readable = pair?.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n\n const writable = pair?.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n\n return { readable, writable };\n}\n","import assert from '../stub/assert';\nimport {\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith\n} from './helpers/webidl';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { AcquireReadableStreamAsyncIterator, type ReadableStreamAsyncIterator } from './readable-stream/async-iterator';\nimport { defaultReaderClosedPromiseReject, defaultReaderClosedPromiseResolve } from './readable-stream/generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderErrorReadRequests,\n type ReadableStreamDefaultReadResult\n} from './readable-stream/default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBReaderErrorReadIntoRequests,\n type ReadableStreamBYOBReadResult\n} from './readable-stream/byob-reader';\nimport { ReadableStreamPipeTo } from './readable-stream/pipe';\nimport { ReadableStreamTee } from './readable-stream/tee';\nimport { ReadableStreamFrom } from './readable-stream/from';\nimport { IsWritableStream, IsWritableStreamLocked, WritableStream } from './writable-stream';\nimport { SimpleQueue } from './simple-queue';\nimport {\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n SetUpReadableByteStreamController,\n SetUpReadableByteStreamControllerFromUnderlyingSource\n} from './readable-stream/byte-stream-controller';\nimport {\n ReadableStreamDefaultController,\n SetUpReadableStreamDefaultController,\n SetUpReadableStreamDefaultControllerFromUnderlyingSource\n} from './readable-stream/default-controller';\nimport type {\n UnderlyingByteSource,\n UnderlyingByteSourcePullCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceStartCallback\n} from './readable-stream/underlying-source';\nimport { noop } from '../utils';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { CreateArrayFromList, SymbolAsyncIterator } from './abstract-ops/ecmascript';\nimport { CancelSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertUnderlyingDefaultOrByteSource } from './validators/underlying-source';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions\n} from './readable-stream/reader-options';\nimport { convertReaderOptions } from './validators/reader-options';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from './readable-stream/pipe-options';\nimport type { ReadableStreamIteratorOptions } from './readable-stream/iterator-options';\nimport { convertIteratorOptions } from './validators/iterator-options';\nimport { convertPipeOptions } from './validators/pipe-options';\nimport type { ReadableWritablePair } from './readable-stream/readable-writable-pair';\nimport { convertReadableWritablePair } from './validators/readable-writable-pair';\nimport type { ReadableStreamDefaultReaderLike, ReadableStreamLike } from './readable-stream/readable-stream-like';\nimport type { NonShared } from './helpers/array-buffer-view';\n\nexport type DefaultReadableStream = ReadableStream & {\n _readableStreamController: ReadableStreamDefaultController\n};\n\nexport type ReadableByteStream = ReadableStream> & {\n _readableStreamController: ReadableByteStreamController\n};\n\ntype ReadableStreamState = 'readable' | 'closed' | 'errored';\n\n/**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\nexport class ReadableStream implements AsyncIterable {\n /** @internal */\n _state!: ReadableStreamState;\n /** @internal */\n _reader: ReadableStreamReader | undefined;\n /** @internal */\n _storedError: any;\n /** @internal */\n _disturbed!: boolean;\n /** @internal */\n _readableStreamController!: ReadableStreamDefaultController | ReadableByteStreamController;\n\n constructor(underlyingSource: UnderlyingByteSource, strategy?: { highWaterMark?: number; size?: undefined });\n constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSource: UnderlyingSource | UnderlyingByteSource | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n } else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n\n InitializeReadableStream(this);\n\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(\n this as unknown as ReadableByteStream,\n underlyingSource,\n highWaterMark\n );\n } else {\n assert(underlyingSource.type === undefined);\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n this,\n underlyingSource,\n highWaterMark,\n sizeAlgorithm\n );\n }\n }\n\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked(): boolean {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsReadableStreamLocked(this);\n }\n\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('cancel'));\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n\n return ReadableStreamCancel(this, reason);\n }\n\n /**\n * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader.\n *\n * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams,\n * i.e. streams which were constructed specifically with the ability to handle \"bring your own buffer\" reading.\n * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its\n * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise\n * control over allocation.\n */\n getReader({ mode }: { mode: 'byob' }): ReadableStreamBYOBReader;\n /**\n * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader.\n * While the stream is locked, no other reader can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to consume a stream\n * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours\n * or cancel the stream, which would interfere with your abstraction.\n */\n getReader(): ReadableStreamDefaultReader;\n getReader(\n rawOptions: ReadableStreamGetReaderOptions | null | undefined = undefined\n ): ReadableStreamDefaultReader | ReadableStreamBYOBReader {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('getReader');\n }\n\n const options = convertReaderOptions(rawOptions, 'First parameter');\n\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n\n assert(options.mode === 'byob');\n return AcquireReadableStreamBYOBReader(this as unknown as ReadableByteStream);\n }\n\n /**\n * Provides a convenient, chainable way of piping this readable stream through a transform stream\n * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream\n * into the writable side of the supplied pair, and returns the readable side for further use.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeThrough(\n transform: { readable: RS; writable: WritableStream },\n options?: StreamPipeOptions\n ): RS;\n pipeThrough(\n rawTransform: { readable: RS; writable: WritableStream } | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}\n ): RS {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n\n const promise = ReadableStreamPipeTo(\n this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n\n setPromiseIsHandledToTrue(promise);\n\n return transform.readable;\n }\n\n /**\n * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under\n * various error conditions can be customized with a number of passed options. It returns a promise that fulfills\n * when the piping process completes successfully, or rejects if any errors were encountered.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise;\n pipeTo(destination: WritableStream | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('pipeTo'));\n }\n\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(\n new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)\n );\n }\n\n let options: ValidatedStreamPipeOptions;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')\n );\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')\n );\n }\n\n return ReadableStreamPipeTo(\n this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n }\n\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee(): [ReadableStream, ReadableStream] {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('tee');\n }\n\n const branches = ReadableStreamTee(this, false);\n return CreateArrayFromList(branches);\n }\n\n /**\n * Asynchronously iterates over the chunks in the stream's internal queue.\n *\n * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader.\n * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method\n * is called, e.g. by breaking out of the loop.\n *\n * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also\n * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing\n * `true` for the `preventCancel` option.\n */\n values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n values(rawOptions: ReadableStreamIteratorOptions | null | undefined = undefined): ReadableStreamAsyncIterator {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('values');\n }\n\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n\n /**\n * {@inheritDoc ReadableStream.values}\n */\n [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n\n [SymbolAsyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator {\n // Stub implementation, overridden below\n return this.values(options);\n }\n\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream {\n return ReadableStreamFrom(asyncIterable);\n }\n}\n\nObject.defineProperties(ReadableStream, {\n from: { enumerable: true }\n});\nObject.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(ReadableStream.from, 'from');\nsetFunctionName(ReadableStream.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStream.prototype.getReader, 'getReader');\nsetFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\nsetFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\nsetFunctionName(ReadableStream.prototype.tee, 'tee');\nsetFunctionName(ReadableStream.prototype.values, 'values');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n}\nObject.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n});\n\nexport type {\n ReadableStreamAsyncIterator,\n ReadableStreamDefaultReadResult,\n ReadableStreamBYOBReadResult,\n ReadableStreamBYOBReaderReadOptions,\n UnderlyingByteSource,\n UnderlyingSource,\n UnderlyingSourceStartCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceCancelCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingByteSourcePullCallback,\n StreamPipeOptions,\n ReadableWritablePair,\n ReadableStreamIteratorOptions,\n ReadableStreamLike,\n ReadableStreamDefaultReaderLike\n};\n\n// Abstract operations for the ReadableStream.\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1\n): DefaultReadableStream {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: DefaultReadableStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n\n return stream;\n}\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableByteStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise\n): ReadableByteStream {\n const stream: ReadableByteStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n\n return stream;\n}\n\nfunction InitializeReadableStream(stream: ReadableStream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n}\n\nexport function IsReadableStream(x: unknown): x is ReadableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStream;\n}\n\nexport function IsReadableStreamDisturbed(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n return stream._disturbed;\n}\n\nexport function IsReadableStreamLocked(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n if (stream._reader === undefined) {\n return false;\n }\n\n return true;\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamCancel(stream: ReadableStream, reason: any): Promise {\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n ReadableStreamClose(stream);\n\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n}\n\nexport function ReadableStreamClose(stream: ReadableStream): void {\n assert(stream._state === 'readable');\n\n stream._state = 'closed';\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseResolve(reader);\n\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n}\n\nexport function ReadableStreamError(stream: ReadableStream, e: any): void {\n assert(IsReadableStream(stream));\n assert(stream._state === 'readable');\n\n stream._state = 'errored';\n stream._storedError = e;\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseReject(reader, e);\n\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n } else {\n assert(IsReadableStreamBYOBReader(reader));\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n}\n\n// Readers\n\nexport type ReadableStreamReader = ReadableStreamDefaultReader | ReadableStreamBYOBReader;\n\nexport {\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader\n};\n\n// Controllers\n\nexport {\n ReadableStreamDefaultController,\n ReadableStreamBYOBRequest,\n ReadableByteStreamController\n};\n\n// Helper functions for the ReadableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n}\n","import type { QueuingStrategyInit } from '../queuing-strategy';\nimport { assertDictionary, assertRequiredField, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategyInit(init: QueuingStrategyInit | null | undefined,\n context: string): QueuingStrategyInit {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst byteLengthSizeFunction = (chunk: ArrayBufferView): number => {\n return chunk.byteLength;\n};\nsetFunctionName(byteLengthSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\nexport default class ByteLengthQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _byteLengthQueuingStrategyHighWaterMark: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size(): (chunk: ArrayBufferView) => number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n}\n\nObject.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the ByteLengthQueuingStrategy.\n\nfunction byteLengthBrandCheckException(name: string): TypeError {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n}\n\nexport function IsByteLengthQueuingStrategy(x: any): x is ByteLengthQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof ByteLengthQueuingStrategy;\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst countSizeFunction = (): 1 => {\n return 1;\n};\nsetFunctionName(countSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\nexport default class CountQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _countQueuingStrategyHighWaterMark!: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size(): (chunk: any) => 1 {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n}\n\nObject.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the CountQueuingStrategy.\n\nfunction countBrandCheckException(name: string): TypeError {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n}\n\nexport function IsCountQueuingStrategy(x: any): x is CountQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof CountQueuingStrategy;\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from '../transform-stream/transformer';\nimport { TransformStreamDefaultController } from '../transform-stream';\n\nexport function convertTransformer(original: Transformer | null,\n context: string): ValidatedTransformer {\n assertDictionary(original, context);\n const cancel = original?.cancel;\n const flush = original?.flush;\n const readableType = original?.readableType;\n const start = original?.start;\n const transform = original?.transform;\n const writableType = original?.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original!, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original!, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original!, `${context} has member 'transform' that`),\n writableType\n };\n}\n\nfunction convertTransformerFlushCallback(\n fn: TransformerFlushCallback,\n original: Transformer,\n context: string\n): (controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertTransformerStartCallback(\n fn: TransformerStartCallback,\n original: Transformer,\n context: string\n): TransformerStartCallback {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertTransformerTransformCallback(\n fn: TransformerTransformCallback,\n original: Transformer,\n context: string\n): (chunk: I, controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: I, controller: TransformStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n\nfunction convertTransformerCancelCallback(\n fn: TransformerCancelCallback,\n original: Transformer,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith,\n uponPromise\n} from './helpers/webidl';\nimport { CreateReadableStream, type DefaultReadableStream, ReadableStream } from './readable-stream';\nimport {\n ReadableStreamDefaultControllerCanCloseOrEnqueue,\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError,\n ReadableStreamDefaultControllerGetDesiredSize,\n ReadableStreamDefaultControllerHasBackpressure\n} from './readable-stream/default-controller';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { CreateWritableStream, WritableStream, WritableStreamDefaultControllerErrorIfNeeded } from './writable-stream';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from './transform-stream/transformer';\nimport { convertTransformer } from './validators/transformer';\n\n// Class TransformStream\n\n/**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\nexport class TransformStream {\n /** @internal */\n _writable!: WritableStream;\n /** @internal */\n _readable!: DefaultReadableStream;\n /** @internal */\n _backpressure!: boolean;\n /** @internal */\n _backpressureChangePromise!: Promise;\n /** @internal */\n _backpressureChangePromise_resolve!: () => void;\n /** @internal */\n _transformStreamController!: TransformStreamDefaultController;\n\n constructor(\n transformer?: Transformer,\n writableStrategy?: QueuingStrategy,\n readableStrategy?: QueuingStrategy\n );\n constructor(rawTransformer: Transformer | null | undefined = {},\n rawWritableStrategy: QueuingStrategy | null | undefined = {},\n rawReadableStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(\n this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm\n );\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n } else {\n startPromise_resolve(undefined);\n }\n }\n\n /**\n * The readable side of the transform stream.\n */\n get readable(): ReadableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n\n return this._readable;\n }\n\n /**\n * The writable side of the transform stream.\n */\n get writable(): WritableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n\n return this._writable;\n }\n}\n\nObject.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n}\n\nexport type {\n Transformer,\n TransformerCancelCallback,\n TransformerStartCallback,\n TransformerFlushCallback,\n TransformerTransformCallback\n};\n\n// Transform Stream Abstract Operations\n\nexport function CreateTransformStream(startAlgorithm: () => void | PromiseLike,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n writableHighWaterMark = 1,\n writableSizeAlgorithm: QueuingStrategySizeCallback = () => 1,\n readableHighWaterMark = 0,\n readableSizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(writableHighWaterMark));\n assert(IsNonNegativeNumber(readableHighWaterMark));\n\n const stream: TransformStream = Object.create(TransformStream.prototype);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n\n const startResult = startAlgorithm();\n startPromise_resolve(startResult);\n return stream;\n}\n\nfunction InitializeTransformStream(stream: TransformStream,\n startPromise: Promise,\n writableHighWaterMark: number,\n writableSizeAlgorithm: QueuingStrategySizeCallback,\n readableHighWaterMark: number,\n readableSizeAlgorithm: QueuingStrategySizeCallback) {\n function startAlgorithm(): Promise {\n return startPromise;\n }\n\n function writeAlgorithm(chunk: I): Promise {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n\n function abortAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n\n function closeAlgorithm(): Promise {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm,\n writableHighWaterMark, writableSizeAlgorithm);\n\n function pullAlgorithm(): Promise {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n\n function cancelAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined!;\n stream._backpressureChangePromise = undefined!;\n stream._backpressureChangePromise_resolve = undefined!;\n TransformStreamSetBackpressure(stream, true);\n\n stream._transformStreamController = undefined!;\n}\n\nfunction IsTransformStream(x: unknown): x is TransformStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n\n return x instanceof TransformStream;\n}\n\n// This is a no-op if both sides are already errored.\nfunction TransformStreamError(stream: TransformStream, e: any) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n}\n\nfunction TransformStreamErrorWritableAndUnblockWrite(stream: TransformStream, e: any) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n}\n\nfunction TransformStreamUnblockWrite(stream: TransformStream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure()\n // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time\n // _backpressure is set.\n TransformStreamSetBackpressure(stream, false);\n }\n}\n\nfunction TransformStreamSetBackpressure(stream: TransformStream, backpressure: boolean) {\n // Passes also when called during construction.\n assert(stream._backpressure !== backpressure);\n\n if (stream._backpressureChangePromise !== undefined) {\n stream._backpressureChangePromise_resolve();\n }\n\n stream._backpressureChangePromise = newPromise(resolve => {\n stream._backpressureChangePromise_resolve = resolve;\n });\n\n stream._backpressure = backpressure;\n}\n\n// Class TransformStreamDefaultController\n\n/**\n * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}.\n *\n * @public\n */\nexport class TransformStreamDefaultController {\n /** @internal */\n _controlledTransformStream: TransformStream;\n /** @internal */\n _finishPromise: Promise | undefined;\n /** @internal */\n _finishPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _finishPromise_reject?: (reason: any) => void;\n /** @internal */\n _transformAlgorithm: (chunk: any) => Promise;\n /** @internal */\n _flushAlgorithm: () => Promise;\n /** @internal */\n _cancelAlgorithm: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full.\n */\n get desiredSize(): number | null {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n const readableController = this._controlledTransformStream._readable._readableStreamController;\n return ReadableStreamDefaultControllerGetDesiredSize(readableController);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the readable side of the controlled transform stream.\n */\n enqueue(chunk: O): void;\n enqueue(chunk: O = undefined!): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n TransformStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors both the readable side and the writable side of the controlled transform stream, making all future\n * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.\n */\n error(reason: any = undefined): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n TransformStreamDefaultControllerError(this, reason);\n }\n\n /**\n * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate(): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n\n TransformStreamDefaultControllerTerminate(this);\n }\n}\n\nObject.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(TransformStreamDefaultController.prototype.error, 'error');\nsetFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n}\n\n// Transform Stream Default Controller Abstract Operations\n\nfunction IsTransformStreamDefaultController(x: any): x is TransformStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n\n return x instanceof TransformStreamDefaultController;\n}\n\nfunction SetUpTransformStreamDefaultController(stream: TransformStream,\n controller: TransformStreamDefaultController,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise) {\n assert(IsTransformStream(stream));\n assert(stream._transformStreamController === undefined);\n\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nfunction SetUpTransformStreamDefaultControllerFromTransformer(stream: TransformStream,\n transformer: ValidatedTransformer) {\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n let transformAlgorithm: (chunk: I) => Promise;\n let flushAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform!(chunk, controller);\n } else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk as unknown as O);\n return promiseResolvedWith(undefined);\n } catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush!(controller);\n } else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n}\n\nfunction TransformStreamDefaultControllerClearAlgorithms(controller: TransformStreamDefaultController) {\n controller._transformAlgorithm = undefined!;\n controller._flushAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\nfunction TransformStreamDefaultControllerEnqueue(controller: TransformStreamDefaultController, chunk: O) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n\n // We throttle transform invocations based on the backpressure of the ReadableStream, but we still\n // accept TransformStreamDefaultControllerEnqueue() calls.\n\n try {\n ReadableStreamDefaultControllerEnqueue(readableController, chunk);\n } catch (e) {\n // This happens when readableStrategy.size() throws.\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n\n throw stream._readable._storedError;\n }\n\n const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);\n if (backpressure !== stream._backpressure) {\n assert(backpressure);\n TransformStreamSetBackpressure(stream, true);\n }\n}\n\nfunction TransformStreamDefaultControllerError(controller: TransformStreamDefaultController, e: any) {\n TransformStreamError(controller._controlledTransformStream, e);\n}\n\nfunction TransformStreamDefaultControllerPerformTransform(controller: TransformStreamDefaultController,\n chunk: I) {\n const transformPromise = controller._transformAlgorithm(chunk);\n return transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n}\n\nfunction TransformStreamDefaultControllerTerminate(controller: TransformStreamDefaultController) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n\n ReadableStreamDefaultControllerClose(readableController);\n\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n}\n\n// TransformStreamDefaultSink Algorithms\n\nfunction TransformStreamDefaultSinkWriteAlgorithm(stream: TransformStream, chunk: I): Promise {\n assert(stream._writable._state === 'writable');\n\n const controller = stream._transformStreamController;\n\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n assert(backpressureChangePromise !== undefined);\n return transformPromiseWith(backpressureChangePromise, () => {\n const writable = stream._writable;\n const state = writable._state;\n if (state === 'erroring') {\n throw writable._storedError;\n }\n assert(state === 'writable');\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n });\n }\n\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n}\n\nfunction TransformStreamDefaultSinkAbortAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally,\n // we don't run the _cancelAlgorithm again.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerError(readable._readableStreamController, reason);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\nfunction TransformStreamDefaultSinkCloseAlgorithm(stream: TransformStream): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// TransformStreamDefaultSource Algorithms\n\nfunction TransformStreamDefaultSourcePullAlgorithm(stream: TransformStream): Promise {\n // Invariant. Enforced by the promises returned by start() and pull().\n assert(stream._backpressure);\n\n assert(stream._backpressureChangePromise !== undefined);\n\n TransformStreamSetBackpressure(stream, false);\n\n // Prevent the next pull() call until there is backpressure.\n return stream._backpressureChangePromise;\n}\n\nfunction TransformStreamDefaultSourceCancelAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._writable cannot change after construction, so caching it across a call to user code is safe.\n const writable = stream._writable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or\n // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the\n // _flushAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (writable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, writable._storedError);\n } else {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// Helper functions for the TransformStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n}\n\nexport function defaultControllerFinishPromiseResolve(controller: TransformStreamDefaultController) {\n if (controller._finishPromise_resolve === undefined) {\n return;\n }\n\n controller._finishPromise_resolve();\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nexport function defaultControllerFinishPromiseReject(controller: TransformStreamDefaultController, reason: any) {\n if (controller._finishPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(controller._finishPromise!);\n controller._finishPromise_reject(reason);\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\n// Helper functions for the TransformStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(\n 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\ No newline at end of file diff --git a/node_modules/web-streams-polyfill/dist/ponyfill.mjs b/node_modules/web-streams-polyfill/dist/ponyfill.mjs new file mode 100644 index 00000000..9f07fe89 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/ponyfill.mjs @@ -0,0 +1,4963 @@ +/** + * @license + * web-streams-polyfill v3.3.3 + * Copyright 2024 Mattias Buelens, Diwank Singh Tomer and other contributors. + * This code is released under the MIT license. + * SPDX-License-Identifier: MIT + */ +/// +var SymbolPolyfill = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? + Symbol : + function (description) { return "Symbol(".concat(description, ")"); }; + +/****************************************************************************** +Copyright (c) Microsoft Corporation. + +Permission to use, copy, modify, and/or distribute this software for any +purpose with or without fee is hereby granted. + +THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH +REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY +AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, +INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM +LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR +OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR +PERFORMANCE OF THIS SOFTWARE. +***************************************************************************** */ +/* global Reflect, Promise, SuppressedError, Symbol */ + + +function __generator(thisArg, body) { + var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g; + return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g; + function verb(n) { return function (v) { return step([n, v]); }; } + function step(op) { + if (f) throw new TypeError("Generator is already executing."); + while (g && (g = 0, op[0] && (_ = 0)), _) try { + if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t; + if (y = 0, t) op = [op[0] & 2, t.value]; + switch (op[0]) { + case 0: case 1: t = op; break; + case 4: _.label++; return { value: op[1], done: false }; + case 5: _.label++; y = op[1]; op = [0]; continue; + case 7: op = _.ops.pop(); _.trys.pop(); continue; + default: + if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; } + if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; } + if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; } + if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; } + if (t[2]) _.ops.pop(); + _.trys.pop(); continue; + } + op = body.call(thisArg, _); + } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; } + if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true }; + } +} + +function __values(o) { + var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0; + if (m) return m.call(o); + if (o && typeof o.length === "number") return { + next: function () { + if (o && i >= o.length) o = void 0; + return { value: o && o[i++], done: !o }; + } + }; + throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined."); +} + +function __await(v) { + return this instanceof __await ? (this.v = v, this) : new __await(v); +} + +function __asyncGenerator(thisArg, _arguments, generator) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var g = generator.apply(thisArg, _arguments || []), i, q = []; + return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i; + function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; } + function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } } + function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); } + function fulfill(value) { resume("next", value); } + function reject(value) { resume("throw", value); } + function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); } +} + +function __asyncDelegator(o) { + var i, p; + return i = {}, verb("next"), verb("throw", function (e) { throw e; }), verb("return"), i[Symbol.iterator] = function () { return this; }, i; + function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; } +} + +function __asyncValues(o) { + if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined."); + var m = o[Symbol.asyncIterator], i; + return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i); + function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; } + function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); } +} + +typeof SuppressedError === "function" ? SuppressedError : function (error, suppressed, message) { + var e = new Error(message); + return e.name = "SuppressedError", e.error = error, e.suppressed = suppressed, e; +}; + +function noop() { + return undefined; +} + +function typeIsObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; +} +var rethrowAssertionErrorRejection = noop; +function setFunctionName(fn, name) { + try { + Object.defineProperty(fn, 'name', { + value: name, + configurable: true + }); + } + catch (_a) { + // This property is non-configurable in older browsers, so ignore if this throws. + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility + } +} + +var originalPromise = Promise; +var originalPromiseThen = Promise.prototype.then; +var originalPromiseReject = Promise.reject.bind(originalPromise); +// https://webidl.spec.whatwg.org/#a-new-promise +function newPromise(executor) { + return new originalPromise(executor); +} +// https://webidl.spec.whatwg.org/#a-promise-resolved-with +function promiseResolvedWith(value) { + return newPromise(function (resolve) { return resolve(value); }); +} +// https://webidl.spec.whatwg.org/#a-promise-rejected-with +function promiseRejectedWith(reason) { + return originalPromiseReject(reason); +} +function PerformPromiseThen(promise, onFulfilled, onRejected) { + // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an + // approximation. + return originalPromiseThen.call(promise, onFulfilled, onRejected); +} +// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned +// from that handler. To prevent this, return null instead of void from all handlers. +// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it +function uponPromise(promise, onFulfilled, onRejected) { + PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection); +} +function uponFulfillment(promise, onFulfilled) { + uponPromise(promise, onFulfilled); +} +function uponRejection(promise, onRejected) { + uponPromise(promise, undefined, onRejected); +} +function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) { + return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler); +} +function setPromiseIsHandledToTrue(promise) { + PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection); +} +var _queueMicrotask = function (callback) { + if (typeof queueMicrotask === 'function') { + _queueMicrotask = queueMicrotask; + } + else { + var resolvedPromise_1 = promiseResolvedWith(undefined); + _queueMicrotask = function (cb) { return PerformPromiseThen(resolvedPromise_1, cb); }; + } + return _queueMicrotask(callback); +}; +function reflectCall(F, V, args) { + if (typeof F !== 'function') { + throw new TypeError('Argument is not a function'); + } + return Function.prototype.apply.call(F, V, args); +} +function promiseCall(F, V, args) { + try { + return promiseResolvedWith(reflectCall(F, V, args)); + } + catch (value) { + return promiseRejectedWith(value); + } +} + +// Original from Chromium +// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js +var QUEUE_MAX_ARRAY_SIZE = 16384; +/** + * Simple queue structure. + * + * Avoids scalability issues with using a packed array directly by using + * multiple arrays in a linked list and keeping the array size bounded. + */ +var SimpleQueue = /** @class */ (function () { + function SimpleQueue() { + this._cursor = 0; + this._size = 0; + // _front and _back are always defined. + this._front = { + _elements: [], + _next: undefined + }; + this._back = this._front; + // The cursor is used to avoid calling Array.shift(). + // It contains the index of the front element of the array inside the + // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE). + this._cursor = 0; + // When there is only one node, size === elements.length - cursor. + this._size = 0; + } + Object.defineProperty(SimpleQueue.prototype, "length", { + get: function () { + return this._size; + }, + enumerable: false, + configurable: true + }); + // For exception safety, this method is structured in order: + // 1. Read state + // 2. Calculate required state mutations + // 3. Perform state mutations + SimpleQueue.prototype.push = function (element) { + var oldBack = this._back; + var newBack = oldBack; + if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) { + newBack = { + _elements: [], + _next: undefined + }; + } + // push() is the mutation most likely to throw an exception, so it + // goes first. + oldBack._elements.push(element); + if (newBack !== oldBack) { + this._back = newBack; + oldBack._next = newBack; + } + ++this._size; + }; + // Like push(), shift() follows the read -> calculate -> mutate pattern for + // exception safety. + SimpleQueue.prototype.shift = function () { // must not be called on an empty queue + var oldFront = this._front; + var newFront = oldFront; + var oldCursor = this._cursor; + var newCursor = oldCursor + 1; + var elements = oldFront._elements; + var element = elements[oldCursor]; + if (newCursor === QUEUE_MAX_ARRAY_SIZE) { + newFront = oldFront._next; + newCursor = 0; + } + // No mutations before this point. + --this._size; + this._cursor = newCursor; + if (oldFront !== newFront) { + this._front = newFront; + } + // Permit shifted element to be garbage collected. + elements[oldCursor] = undefined; + return element; + }; + // The tricky thing about forEach() is that it can be called + // re-entrantly. The queue may be mutated inside the callback. It is easy to + // see that push() within the callback has no negative effects since the end + // of the queue is checked for on every iteration. If shift() is called + // repeatedly within the callback then the next iteration may return an + // element that has been removed. In this case the callback will be called + // with undefined values until we either "catch up" with elements that still + // exist or reach the back of the queue. + SimpleQueue.prototype.forEach = function (callback) { + var i = this._cursor; + var node = this._front; + var elements = node._elements; + while (i !== elements.length || node._next !== undefined) { + if (i === elements.length) { + node = node._next; + elements = node._elements; + i = 0; + if (elements.length === 0) { + break; + } + } + callback(elements[i]); + ++i; + } + }; + // Return the element that would be returned if shift() was called now, + // without modifying the queue. + SimpleQueue.prototype.peek = function () { // must not be called on an empty queue + var front = this._front; + var cursor = this._cursor; + return front._elements[cursor]; + }; + return SimpleQueue; +}()); + +var AbortSteps = SymbolPolyfill('[[AbortSteps]]'); +var ErrorSteps = SymbolPolyfill('[[ErrorSteps]]'); +var CancelSteps = SymbolPolyfill('[[CancelSteps]]'); +var PullSteps = SymbolPolyfill('[[PullSteps]]'); +var ReleaseSteps = SymbolPolyfill('[[ReleaseSteps]]'); + +function ReadableStreamReaderGenericInitialize(reader, stream) { + reader._ownerReadableStream = stream; + stream._reader = reader; + if (stream._state === 'readable') { + defaultReaderClosedPromiseInitialize(reader); + } + else if (stream._state === 'closed') { + defaultReaderClosedPromiseInitializeAsResolved(reader); + } + else { + defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError); + } +} +// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state +// check. +function ReadableStreamReaderGenericCancel(reader, reason) { + var stream = reader._ownerReadableStream; + return ReadableStreamCancel(stream, reason); +} +function ReadableStreamReaderGenericRelease(reader) { + var stream = reader._ownerReadableStream; + if (stream._state === 'readable') { + defaultReaderClosedPromiseReject(reader, new TypeError("Reader was released and can no longer be used to monitor the stream's closedness")); + } + else { + defaultReaderClosedPromiseResetToRejected(reader, new TypeError("Reader was released and can no longer be used to monitor the stream's closedness")); + } + stream._readableStreamController[ReleaseSteps](); + stream._reader = undefined; + reader._ownerReadableStream = undefined; +} +// Helper functions for the readers. +function readerLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released reader'); +} +// Helper functions for the ReadableStreamDefaultReader. +function defaultReaderClosedPromiseInitialize(reader) { + reader._closedPromise = newPromise(function (resolve, reject) { + reader._closedPromise_resolve = resolve; + reader._closedPromise_reject = reject; + }); +} +function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseReject(reader, reason); +} +function defaultReaderClosedPromiseInitializeAsResolved(reader) { + defaultReaderClosedPromiseInitialize(reader); + defaultReaderClosedPromiseResolve(reader); +} +function defaultReaderClosedPromiseReject(reader, reason) { + if (reader._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(reader._closedPromise); + reader._closedPromise_reject(reason); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; +} +function defaultReaderClosedPromiseResetToRejected(reader, reason) { + defaultReaderClosedPromiseInitializeAsRejected(reader, reason); +} +function defaultReaderClosedPromiseResolve(reader) { + if (reader._closedPromise_resolve === undefined) { + return; + } + reader._closedPromise_resolve(undefined); + reader._closedPromise_resolve = undefined; + reader._closedPromise_reject = undefined; +} + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill +var NumberIsFinite = Number.isFinite || function (x) { + return typeof x === 'number' && isFinite(x); +}; + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill +var MathTrunc = Math.trunc || function (v) { + return v < 0 ? Math.ceil(v) : Math.floor(v); +}; + +// https://heycam.github.io/webidl/#idl-dictionaries +function isDictionary(x) { + return typeof x === 'object' || typeof x === 'function'; +} +function assertDictionary(obj, context) { + if (obj !== undefined && !isDictionary(obj)) { + throw new TypeError("".concat(context, " is not an object.")); + } +} +// https://heycam.github.io/webidl/#idl-callback-functions +function assertFunction(x, context) { + if (typeof x !== 'function') { + throw new TypeError("".concat(context, " is not a function.")); + } +} +// https://heycam.github.io/webidl/#idl-object +function isObject(x) { + return (typeof x === 'object' && x !== null) || typeof x === 'function'; +} +function assertObject(x, context) { + if (!isObject(x)) { + throw new TypeError("".concat(context, " is not an object.")); + } +} +function assertRequiredArgument(x, position, context) { + if (x === undefined) { + throw new TypeError("Parameter ".concat(position, " is required in '").concat(context, "'.")); + } +} +function assertRequiredField(x, field, context) { + if (x === undefined) { + throw new TypeError("".concat(field, " is required in '").concat(context, "'.")); + } +} +// https://heycam.github.io/webidl/#idl-unrestricted-double +function convertUnrestrictedDouble(value) { + return Number(value); +} +function censorNegativeZero(x) { + return x === 0 ? 0 : x; +} +function integerPart(x) { + return censorNegativeZero(MathTrunc(x)); +} +// https://heycam.github.io/webidl/#idl-unsigned-long-long +function convertUnsignedLongLongWithEnforceRange(value, context) { + var lowerBound = 0; + var upperBound = Number.MAX_SAFE_INTEGER; + var x = Number(value); + x = censorNegativeZero(x); + if (!NumberIsFinite(x)) { + throw new TypeError("".concat(context, " is not a finite number")); + } + x = integerPart(x); + if (x < lowerBound || x > upperBound) { + throw new TypeError("".concat(context, " is outside the accepted range of ").concat(lowerBound, " to ").concat(upperBound, ", inclusive")); + } + if (!NumberIsFinite(x) || x === 0) { + return 0; + } + // TODO Use BigInt if supported? + // let xBigInt = BigInt(integerPart(x)); + // xBigInt = BigInt.asUintN(64, xBigInt); + // return Number(xBigInt); + return x; +} + +function assertReadableStream(x, context) { + if (!IsReadableStream(x)) { + throw new TypeError("".concat(context, " is not a ReadableStream.")); + } +} + +// Abstract operations for the ReadableStream. +function AcquireReadableStreamDefaultReader(stream) { + return new ReadableStreamDefaultReader(stream); +} +// ReadableStream API exposed for controllers. +function ReadableStreamAddReadRequest(stream, readRequest) { + stream._reader._readRequests.push(readRequest); +} +function ReadableStreamFulfillReadRequest(stream, chunk, done) { + var reader = stream._reader; + var readRequest = reader._readRequests.shift(); + if (done) { + readRequest._closeSteps(); + } + else { + readRequest._chunkSteps(chunk); + } +} +function ReadableStreamGetNumReadRequests(stream) { + return stream._reader._readRequests.length; +} +function ReadableStreamHasDefaultReader(stream) { + var reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamDefaultReader(reader)) { + return false; + } + return true; +} +/** + * A default reader vended by a {@link ReadableStream}. + * + * @public + */ +var ReadableStreamDefaultReader = /** @class */ (function () { + function ReadableStreamDefaultReader(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readRequests = new SimpleQueue(); + } + Object.defineProperty(ReadableStreamDefaultReader.prototype, "closed", { + /** + * Returns a promise that will be fulfilled when the stream becomes closed, + * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing. + */ + get: function () { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('closed')); + } + return this._closedPromise; + }, + enumerable: false, + configurable: true + }); + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + ReadableStreamDefaultReader.prototype.cancel = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + }; + /** + * Returns a promise that allows access to the next chunk from the stream's internal queue, if available. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + ReadableStreamDefaultReader.prototype.read = function () { + if (!IsReadableStreamDefaultReader(this)) { + return promiseRejectedWith(defaultReaderBrandCheckException('read')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + var resolvePromise; + var rejectPromise; + var promise = newPromise(function (resolve, reject) { + resolvePromise = resolve; + rejectPromise = reject; + }); + var readRequest = { + _chunkSteps: function (chunk) { return resolvePromise({ value: chunk, done: false }); }, + _closeSteps: function () { return resolvePromise({ value: undefined, done: true }); }, + _errorSteps: function (e) { return rejectPromise(e); } + }; + ReadableStreamDefaultReaderRead(this, readRequest); + return promise; + }; + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + ReadableStreamDefaultReader.prototype.releaseLock = function () { + if (!IsReadableStreamDefaultReader(this)) { + throw defaultReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamDefaultReaderRelease(this); + }; + return ReadableStreamDefaultReader; +}()); +Object.defineProperties(ReadableStreamDefaultReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } +}); +setFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel'); +setFunctionName(ReadableStreamDefaultReader.prototype.read, 'read'); +setFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultReader.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamDefaultReader', + configurable: true + }); +} +// Abstract operations for the readers. +function IsReadableStreamDefaultReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) { + return false; + } + return x instanceof ReadableStreamDefaultReader; +} +function ReadableStreamDefaultReaderRead(reader, readRequest) { + var stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'closed') { + readRequest._closeSteps(); + } + else if (stream._state === 'errored') { + readRequest._errorSteps(stream._storedError); + } + else { + stream._readableStreamController[PullSteps](readRequest); + } +} +function ReadableStreamDefaultReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + var e = new TypeError('Reader was released'); + ReadableStreamDefaultReaderErrorReadRequests(reader, e); +} +function ReadableStreamDefaultReaderErrorReadRequests(reader, e) { + var readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(function (readRequest) { + readRequest._errorSteps(e); + }); +} +// Helper functions for the ReadableStreamDefaultReader. +function defaultReaderBrandCheckException(name) { + return new TypeError("ReadableStreamDefaultReader.prototype.".concat(name, " can only be used on a ReadableStreamDefaultReader")); +} + +var _a$1, _b, _c; +function CreateArrayFromList(elements) { + // We use arrays to represent lists, so this is basically a no-op. + // Do a slice though just in case we happen to depend on the unique-ness. + return elements.slice(); +} +function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) { + new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset); +} +var TransferArrayBuffer = function (O) { + if (typeof O.transfer === 'function') { + TransferArrayBuffer = function (buffer) { return buffer.transfer(); }; + } + else if (typeof structuredClone === 'function') { + TransferArrayBuffer = function (buffer) { return structuredClone(buffer, { transfer: [buffer] }); }; + } + else { + // Not implemented correctly + TransferArrayBuffer = function (buffer) { return buffer; }; + } + return TransferArrayBuffer(O); +}; +var IsDetachedBuffer = function (O) { + if (typeof O.detached === 'boolean') { + IsDetachedBuffer = function (buffer) { return buffer.detached; }; + } + else { + // Not implemented correctly + IsDetachedBuffer = function (buffer) { return buffer.byteLength === 0; }; + } + return IsDetachedBuffer(O); +}; +function ArrayBufferSlice(buffer, begin, end) { + // ArrayBuffer.prototype.slice is not available on IE10 + // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice + if (buffer.slice) { + return buffer.slice(begin, end); + } + var length = end - begin; + var slice = new ArrayBuffer(length); + CopyDataBlockBytes(slice, 0, buffer, begin, length); + return slice; +} +function GetMethod(receiver, prop) { + var func = receiver[prop]; + if (func === undefined || func === null) { + return undefined; + } + if (typeof func !== 'function') { + throw new TypeError("".concat(String(prop), " is not a function")); + } + return func; +} +function CreateAsyncFromSyncIterator(syncIteratorRecord) { + // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%, + // we use yield* inside an async generator function to achieve the same result. + var _a; + // Wrap the sync iterator inside a sync iterable, so we can use it with yield*. + var syncIterable = (_a = {}, + _a[SymbolPolyfill.iterator] = function () { return syncIteratorRecord.iterator; }, + _a); + // Create an async generator function and immediately invoke it. + var asyncIterator = (function () { + return __asyncGenerator(this, arguments, function () { + return __generator(this, function (_a) { + switch (_a.label) { + case 0: return [5 /*yield**/, __values(__asyncDelegator(__asyncValues(syncIterable)))]; + case 1: return [4 /*yield*/, __await.apply(void 0, [_a.sent()])]; + case 2: return [4 /*yield*/, __await.apply(void 0, [_a.sent()])]; + case 3: return [2 /*return*/, _a.sent()]; + } + }); + }); + }()); + // Return as an async iterator record. + var nextMethod = asyncIterator.next; + return { iterator: asyncIterator, nextMethod: nextMethod, done: false }; +} +// Aligns with core-js/modules/es.symbol.async-iterator.js +var SymbolAsyncIterator = (_c = (_a$1 = SymbolPolyfill.asyncIterator) !== null && _a$1 !== void 0 ? _a$1 : (_b = SymbolPolyfill.for) === null || _b === void 0 ? void 0 : _b.call(SymbolPolyfill, 'Symbol.asyncIterator')) !== null && _c !== void 0 ? _c : '@@asyncIterator'; +function GetIterator(obj, hint, method) { + if (hint === void 0) { hint = 'sync'; } + if (method === undefined) { + if (hint === 'async') { + method = GetMethod(obj, SymbolAsyncIterator); + if (method === undefined) { + var syncMethod = GetMethod(obj, SymbolPolyfill.iterator); + var syncIteratorRecord = GetIterator(obj, 'sync', syncMethod); + return CreateAsyncFromSyncIterator(syncIteratorRecord); + } + } + else { + method = GetMethod(obj, SymbolPolyfill.iterator); + } + } + if (method === undefined) { + throw new TypeError('The object is not iterable'); + } + var iterator = reflectCall(method, obj, []); + if (!typeIsObject(iterator)) { + throw new TypeError('The iterator method must return an object'); + } + var nextMethod = iterator.next; + return { iterator: iterator, nextMethod: nextMethod, done: false }; +} +function IteratorNext(iteratorRecord) { + var result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []); + if (!typeIsObject(result)) { + throw new TypeError('The iterator.next() method must return an object'); + } + return result; +} +function IteratorComplete(iterResult) { + return Boolean(iterResult.done); +} +function IteratorValue(iterResult) { + return iterResult.value; +} + +/// +var _a; +// We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it. +var AsyncIteratorPrototype = (_a = {}, + // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( ) + // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator + _a[SymbolAsyncIterator] = function () { + return this; + }, + _a); +Object.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false }); + +/// +var ReadableStreamAsyncIteratorImpl = /** @class */ (function () { + function ReadableStreamAsyncIteratorImpl(reader, preventCancel) { + this._ongoingPromise = undefined; + this._isFinished = false; + this._reader = reader; + this._preventCancel = preventCancel; + } + ReadableStreamAsyncIteratorImpl.prototype.next = function () { + var _this = this; + var nextSteps = function () { return _this._nextSteps(); }; + this._ongoingPromise = this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) : + nextSteps(); + return this._ongoingPromise; + }; + ReadableStreamAsyncIteratorImpl.prototype.return = function (value) { + var _this = this; + var returnSteps = function () { return _this._returnSteps(value); }; + return this._ongoingPromise ? + transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) : + returnSteps(); + }; + ReadableStreamAsyncIteratorImpl.prototype._nextSteps = function () { + var _this = this; + if (this._isFinished) { + return Promise.resolve({ value: undefined, done: true }); + } + var reader = this._reader; + var resolvePromise; + var rejectPromise; + var promise = newPromise(function (resolve, reject) { + resolvePromise = resolve; + rejectPromise = reject; + }); + var readRequest = { + _chunkSteps: function (chunk) { + _this._ongoingPromise = undefined; + // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test. + // FIXME Is this a bug in the specification, or in the test? + _queueMicrotask(function () { return resolvePromise({ value: chunk, done: false }); }); + }, + _closeSteps: function () { + _this._ongoingPromise = undefined; + _this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + resolvePromise({ value: undefined, done: true }); + }, + _errorSteps: function (reason) { + _this._ongoingPromise = undefined; + _this._isFinished = true; + ReadableStreamReaderGenericRelease(reader); + rejectPromise(reason); + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promise; + }; + ReadableStreamAsyncIteratorImpl.prototype._returnSteps = function (value) { + if (this._isFinished) { + return Promise.resolve({ value: value, done: true }); + } + this._isFinished = true; + var reader = this._reader; + if (!this._preventCancel) { + var result = ReadableStreamReaderGenericCancel(reader, value); + ReadableStreamReaderGenericRelease(reader); + return transformPromiseWith(result, function () { return ({ value: value, done: true }); }); + } + ReadableStreamReaderGenericRelease(reader); + return promiseResolvedWith({ value: value, done: true }); + }; + return ReadableStreamAsyncIteratorImpl; +}()); +var ReadableStreamAsyncIteratorPrototype = { + next: function () { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next')); + } + return this._asyncIteratorImpl.next(); + }, + return: function (value) { + if (!IsReadableStreamAsyncIterator(this)) { + return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return')); + } + return this._asyncIteratorImpl.return(value); + } +}; +Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype); +// Abstract operations for the ReadableStream. +function AcquireReadableStreamAsyncIterator(stream, preventCancel) { + var reader = AcquireReadableStreamDefaultReader(stream); + var impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel); + var iterator = Object.create(ReadableStreamAsyncIteratorPrototype); + iterator._asyncIteratorImpl = impl; + return iterator; +} +function IsReadableStreamAsyncIterator(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) { + return false; + } + try { + // noinspection SuspiciousTypeOfGuard + return x._asyncIteratorImpl instanceof + ReadableStreamAsyncIteratorImpl; + } + catch (_a) { + return false; + } +} +// Helper functions for the ReadableStream. +function streamAsyncIteratorBrandCheckException(name) { + return new TypeError("ReadableStreamAsyncIterator.".concat(name, " can only be used on a ReadableSteamAsyncIterator")); +} + +/// +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill +var NumberIsNaN = Number.isNaN || function (x) { + // eslint-disable-next-line no-self-compare + return x !== x; +}; + +function IsNonNegativeNumber(v) { + if (typeof v !== 'number') { + return false; + } + if (NumberIsNaN(v)) { + return false; + } + if (v < 0) { + return false; + } + return true; +} +function CloneAsUint8Array(O) { + var buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength); + return new Uint8Array(buffer); +} + +function DequeueValue(container) { + var pair = container._queue.shift(); + container._queueTotalSize -= pair.size; + if (container._queueTotalSize < 0) { + container._queueTotalSize = 0; + } + return pair.value; +} +function EnqueueValueWithSize(container, value, size) { + if (!IsNonNegativeNumber(size) || size === Infinity) { + throw new RangeError('Size must be a finite, non-NaN, non-negative number.'); + } + container._queue.push({ value: value, size: size }); + container._queueTotalSize += size; +} +function PeekQueueValue(container) { + var pair = container._queue.peek(); + return pair.value; +} +function ResetQueue(container) { + container._queue = new SimpleQueue(); + container._queueTotalSize = 0; +} + +function isDataViewConstructor(ctor) { + return ctor === DataView; +} +function isDataView(view) { + return isDataViewConstructor(view.constructor); +} +function arrayBufferViewElementSize(ctor) { + if (isDataViewConstructor(ctor)) { + return 1; + } + return ctor.BYTES_PER_ELEMENT; +} + +/** + * A pull-into request in a {@link ReadableByteStreamController}. + * + * @public + */ +var ReadableStreamBYOBRequest = /** @class */ (function () { + function ReadableStreamBYOBRequest() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(ReadableStreamBYOBRequest.prototype, "view", { + /** + * Returns the view for writing in to, or `null` if the BYOB request has already been responded to. + */ + get: function () { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('view'); + } + return this._view; + }, + enumerable: false, + configurable: true + }); + ReadableStreamBYOBRequest.prototype.respond = function (bytesWritten) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respond'); + } + assertRequiredArgument(bytesWritten, 1, 'respond'); + bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter'); + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(this._view.buffer)) { + throw new TypeError("The BYOB request's buffer has been detached and so cannot be used as a response"); + } + ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten); + }; + ReadableStreamBYOBRequest.prototype.respondWithNewView = function (view) { + if (!IsReadableStreamBYOBRequest(this)) { + throw byobRequestBrandCheckException('respondWithNewView'); + } + assertRequiredArgument(view, 1, 'respondWithNewView'); + if (!ArrayBuffer.isView(view)) { + throw new TypeError('You can only respond with array buffer views'); + } + if (this._associatedReadableByteStreamController === undefined) { + throw new TypeError('This BYOB request has been invalidated'); + } + if (IsDetachedBuffer(view.buffer)) { + throw new TypeError('The given view\'s buffer has been detached and so cannot be used as a response'); + } + ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view); + }; + return ReadableStreamBYOBRequest; +}()); +Object.defineProperties(ReadableStreamBYOBRequest.prototype, { + respond: { enumerable: true }, + respondWithNewView: { enumerable: true }, + view: { enumerable: true } +}); +setFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond'); +setFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBRequest.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamBYOBRequest', + configurable: true + }); +} +/** + * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue. + * + * @public + */ +var ReadableByteStreamController = /** @class */ (function () { + function ReadableByteStreamController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(ReadableByteStreamController.prototype, "byobRequest", { + /** + * Returns the current BYOB pull request, or `null` if there isn't one. + */ + get: function () { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('byobRequest'); + } + return ReadableByteStreamControllerGetBYOBRequest(this); + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(ReadableByteStreamController.prototype, "desiredSize", { + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure. + */ + get: function () { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('desiredSize'); + } + return ReadableByteStreamControllerGetDesiredSize(this); + }, + enumerable: false, + configurable: true + }); + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + ReadableByteStreamController.prototype.close = function () { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('close'); + } + if (this._closeRequested) { + throw new TypeError('The stream has already been closed; do not close it again!'); + } + var state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError("The stream (in ".concat(state, " state) is not in the readable state and cannot be closed")); + } + ReadableByteStreamControllerClose(this); + }; + ReadableByteStreamController.prototype.enqueue = function (chunk) { + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('enqueue'); + } + assertRequiredArgument(chunk, 1, 'enqueue'); + if (!ArrayBuffer.isView(chunk)) { + throw new TypeError('chunk must be an array buffer view'); + } + if (chunk.byteLength === 0) { + throw new TypeError('chunk must have non-zero byteLength'); + } + if (chunk.buffer.byteLength === 0) { + throw new TypeError("chunk's buffer must have non-zero byteLength"); + } + if (this._closeRequested) { + throw new TypeError('stream is closed or draining'); + } + var state = this._controlledReadableByteStream._state; + if (state !== 'readable') { + throw new TypeError("The stream (in ".concat(state, " state) is not in the readable state and cannot be enqueued to")); + } + ReadableByteStreamControllerEnqueue(this, chunk); + }; + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + ReadableByteStreamController.prototype.error = function (e) { + if (e === void 0) { e = undefined; } + if (!IsReadableByteStreamController(this)) { + throw byteStreamControllerBrandCheckException('error'); + } + ReadableByteStreamControllerError(this, e); + }; + /** @internal */ + ReadableByteStreamController.prototype[CancelSteps] = function (reason) { + ReadableByteStreamControllerClearPendingPullIntos(this); + ResetQueue(this); + var result = this._cancelAlgorithm(reason); + ReadableByteStreamControllerClearAlgorithms(this); + return result; + }; + /** @internal */ + ReadableByteStreamController.prototype[PullSteps] = function (readRequest) { + var stream = this._controlledReadableByteStream; + if (this._queueTotalSize > 0) { + ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest); + return; + } + var autoAllocateChunkSize = this._autoAllocateChunkSize; + if (autoAllocateChunkSize !== undefined) { + var buffer = void 0; + try { + buffer = new ArrayBuffer(autoAllocateChunkSize); + } + catch (bufferE) { + readRequest._errorSteps(bufferE); + return; + } + var pullIntoDescriptor = { + buffer: buffer, + bufferByteLength: autoAllocateChunkSize, + byteOffset: 0, + byteLength: autoAllocateChunkSize, + bytesFilled: 0, + minimumFill: 1, + elementSize: 1, + viewConstructor: Uint8Array, + readerType: 'default' + }; + this._pendingPullIntos.push(pullIntoDescriptor); + } + ReadableStreamAddReadRequest(stream, readRequest); + ReadableByteStreamControllerCallPullIfNeeded(this); + }; + /** @internal */ + ReadableByteStreamController.prototype[ReleaseSteps] = function () { + if (this._pendingPullIntos.length > 0) { + var firstPullInto = this._pendingPullIntos.peek(); + firstPullInto.readerType = 'none'; + this._pendingPullIntos = new SimpleQueue(); + this._pendingPullIntos.push(firstPullInto); + } + }; + return ReadableByteStreamController; +}()); +Object.defineProperties(ReadableByteStreamController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + byobRequest: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(ReadableByteStreamController.prototype.close, 'close'); +setFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue'); +setFunctionName(ReadableByteStreamController.prototype.error, 'error'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableByteStreamController.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableByteStreamController', + configurable: true + }); +} +// Abstract operations for the ReadableByteStreamController. +function IsReadableByteStreamController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) { + return false; + } + return x instanceof ReadableByteStreamController; +} +function IsReadableStreamBYOBRequest(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) { + return false; + } + return x instanceof ReadableStreamBYOBRequest; +} +function ReadableByteStreamControllerCallPullIfNeeded(controller) { + var shouldPull = ReadableByteStreamControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + // TODO: Test controller argument + var pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, function () { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableByteStreamControllerCallPullIfNeeded(controller); + } + return null; + }, function (e) { + ReadableByteStreamControllerError(controller, e); + return null; + }); +} +function ReadableByteStreamControllerClearPendingPullIntos(controller) { + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + controller._pendingPullIntos = new SimpleQueue(); +} +function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) { + var done = false; + if (stream._state === 'closed') { + done = true; + } + var filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'default') { + ReadableStreamFulfillReadRequest(stream, filledView, done); + } + else { + ReadableStreamFulfillReadIntoRequest(stream, filledView, done); + } +} +function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) { + var bytesFilled = pullIntoDescriptor.bytesFilled; + var elementSize = pullIntoDescriptor.elementSize; + return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize); +} +function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) { + controller._queue.push({ buffer: buffer, byteOffset: byteOffset, byteLength: byteLength }); + controller._queueTotalSize += byteLength; +} +function ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, buffer, byteOffset, byteLength) { + var clonedChunk; + try { + clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength); + } + catch (cloneE) { + ReadableByteStreamControllerError(controller, cloneE); + throw cloneE; + } + ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength); +} +function ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstDescriptor) { + if (firstDescriptor.bytesFilled > 0) { + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, firstDescriptor.buffer, firstDescriptor.byteOffset, firstDescriptor.bytesFilled); + } + ReadableByteStreamControllerShiftPendingPullInto(controller); +} +function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) { + var maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled); + var maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy; + var totalBytesToCopyRemaining = maxBytesToCopy; + var ready = false; + var remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize; + var maxAlignedBytes = maxBytesFilled - remainderBytes; + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) { + totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled; + ready = true; + } + var queue = controller._queue; + while (totalBytesToCopyRemaining > 0) { + var headOfQueue = queue.peek(); + var bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength); + var destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy); + if (headOfQueue.byteLength === bytesToCopy) { + queue.shift(); + } + else { + headOfQueue.byteOffset += bytesToCopy; + headOfQueue.byteLength -= bytesToCopy; + } + controller._queueTotalSize -= bytesToCopy; + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor); + totalBytesToCopyRemaining -= bytesToCopy; + } + return ready; +} +function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) { + pullIntoDescriptor.bytesFilled += size; +} +function ReadableByteStreamControllerHandleQueueDrain(controller) { + if (controller._queueTotalSize === 0 && controller._closeRequested) { + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(controller._controlledReadableByteStream); + } + else { + ReadableByteStreamControllerCallPullIfNeeded(controller); + } +} +function ReadableByteStreamControllerInvalidateBYOBRequest(controller) { + if (controller._byobRequest === null) { + return; + } + controller._byobRequest._associatedReadableByteStreamController = undefined; + controller._byobRequest._view = null; + controller._byobRequest = null; +} +function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) { + while (controller._pendingPullIntos.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + var pullIntoDescriptor = controller._pendingPullIntos.peek(); + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + } + } +} +function ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller) { + var reader = controller._controlledReadableByteStream._reader; + while (reader._readRequests.length > 0) { + if (controller._queueTotalSize === 0) { + return; + } + var readRequest = reader._readRequests.shift(); + ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest); + } +} +function ReadableByteStreamControllerPullInto(controller, view, min, readIntoRequest) { + var stream = controller._controlledReadableByteStream; + var ctor = view.constructor; + var elementSize = arrayBufferViewElementSize(ctor); + var byteOffset = view.byteOffset, byteLength = view.byteLength; + var minimumFill = min * elementSize; + var buffer; + try { + buffer = TransferArrayBuffer(view.buffer); + } + catch (e) { + readIntoRequest._errorSteps(e); + return; + } + var pullIntoDescriptor = { + buffer: buffer, + bufferByteLength: buffer.byteLength, + byteOffset: byteOffset, + byteLength: byteLength, + bytesFilled: 0, + minimumFill: minimumFill, + elementSize: elementSize, + viewConstructor: ctor, + readerType: 'byob' + }; + if (controller._pendingPullIntos.length > 0) { + controller._pendingPullIntos.push(pullIntoDescriptor); + // No ReadableByteStreamControllerCallPullIfNeeded() call since: + // - No change happens on desiredSize + // - The source has already been notified of that there's at least 1 pending read(view) + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + return; + } + if (stream._state === 'closed') { + var emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0); + readIntoRequest._closeSteps(emptyView); + return; + } + if (controller._queueTotalSize > 0) { + if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) { + var filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor); + ReadableByteStreamControllerHandleQueueDrain(controller); + readIntoRequest._chunkSteps(filledView); + return; + } + if (controller._closeRequested) { + var e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + readIntoRequest._errorSteps(e); + return; + } + } + controller._pendingPullIntos.push(pullIntoDescriptor); + ReadableStreamAddReadIntoRequest(stream, readIntoRequest); + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) { + if (firstDescriptor.readerType === 'none') { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + var stream = controller._controlledReadableByteStream; + if (ReadableStreamHasBYOBReader(stream)) { + while (ReadableStreamGetNumReadIntoRequests(stream) > 0) { + var pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller); + ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor); + } + } +} +function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) { + ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor); + if (pullIntoDescriptor.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + return; + } + if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) { + // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head + // of the queue, so the underlying source can keep filling it. + return; + } + ReadableByteStreamControllerShiftPendingPullInto(controller); + var remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize; + if (remainderSize > 0) { + var end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled; + ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, pullIntoDescriptor.buffer, end - remainderSize, remainderSize); + } + pullIntoDescriptor.bytesFilled -= remainderSize; + ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); +} +function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) { + var firstDescriptor = controller._pendingPullIntos.peek(); + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + var state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor); + } + else { + ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerShiftPendingPullInto(controller) { + var descriptor = controller._pendingPullIntos.shift(); + return descriptor; +} +function ReadableByteStreamControllerShouldCallPull(controller) { + var stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return false; + } + if (controller._closeRequested) { + return false; + } + if (!controller._started) { + return false; + } + if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) { + return true; + } + var desiredSize = ReadableByteStreamControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; +} +function ReadableByteStreamControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; +} +// A client of ReadableByteStreamController may use these functions directly to bypass state check. +function ReadableByteStreamControllerClose(controller) { + var stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + if (controller._queueTotalSize > 0) { + controller._closeRequested = true; + return; + } + if (controller._pendingPullIntos.length > 0) { + var firstPendingPullInto = controller._pendingPullIntos.peek(); + if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) { + var e = new TypeError('Insufficient bytes to fill elements in the given buffer'); + ReadableByteStreamControllerError(controller, e); + throw e; + } + } + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamClose(stream); +} +function ReadableByteStreamControllerEnqueue(controller, chunk) { + var stream = controller._controlledReadableByteStream; + if (controller._closeRequested || stream._state !== 'readable') { + return; + } + var buffer = chunk.buffer, byteOffset = chunk.byteOffset, byteLength = chunk.byteLength; + if (IsDetachedBuffer(buffer)) { + throw new TypeError('chunk\'s buffer is detached and so cannot be enqueued'); + } + var transferredBuffer = TransferArrayBuffer(buffer); + if (controller._pendingPullIntos.length > 0) { + var firstPendingPullInto = controller._pendingPullIntos.peek(); + if (IsDetachedBuffer(firstPendingPullInto.buffer)) { + throw new TypeError('The BYOB request\'s buffer has been detached and so cannot be filled with an enqueued chunk'); + } + ReadableByteStreamControllerInvalidateBYOBRequest(controller); + firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer); + if (firstPendingPullInto.readerType === 'none') { + ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto); + } + } + if (ReadableStreamHasDefaultReader(stream)) { + ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller); + if (ReadableStreamGetNumReadRequests(stream) === 0) { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + else { + if (controller._pendingPullIntos.length > 0) { + ReadableByteStreamControllerShiftPendingPullInto(controller); + } + var transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength); + ReadableStreamFulfillReadRequest(stream, transferredView, false); + } + } + else if (ReadableStreamHasBYOBReader(stream)) { + // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully. + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller); + } + else { + ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength); + } + ReadableByteStreamControllerCallPullIfNeeded(controller); +} +function ReadableByteStreamControllerError(controller, e) { + var stream = controller._controlledReadableByteStream; + if (stream._state !== 'readable') { + return; + } + ReadableByteStreamControllerClearPendingPullIntos(controller); + ResetQueue(controller); + ReadableByteStreamControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); +} +function ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest) { + var entry = controller._queue.shift(); + controller._queueTotalSize -= entry.byteLength; + ReadableByteStreamControllerHandleQueueDrain(controller); + var view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength); + readRequest._chunkSteps(view); +} +function ReadableByteStreamControllerGetBYOBRequest(controller) { + if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) { + var firstDescriptor = controller._pendingPullIntos.peek(); + var view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled); + var byobRequest = Object.create(ReadableStreamBYOBRequest.prototype); + SetUpReadableStreamBYOBRequest(byobRequest, controller, view); + controller._byobRequest = byobRequest; + } + return controller._byobRequest; +} +function ReadableByteStreamControllerGetDesiredSize(controller) { + var state = controller._controlledReadableByteStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; +} +function ReadableByteStreamControllerRespond(controller, bytesWritten) { + var firstDescriptor = controller._pendingPullIntos.peek(); + var state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (bytesWritten !== 0) { + throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream'); + } + } + else { + if (bytesWritten === 0) { + throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream'); + } + if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) { + throw new RangeError('bytesWritten out of range'); + } + } + firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer); + ReadableByteStreamControllerRespondInternal(controller, bytesWritten); +} +function ReadableByteStreamControllerRespondWithNewView(controller, view) { + var firstDescriptor = controller._pendingPullIntos.peek(); + var state = controller._controlledReadableByteStream._state; + if (state === 'closed') { + if (view.byteLength !== 0) { + throw new TypeError('The view\'s length must be 0 when calling respondWithNewView() on a closed stream'); + } + } + else { + if (view.byteLength === 0) { + throw new TypeError('The view\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'); + } + } + if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) { + throw new RangeError('The region specified by view does not match byobRequest'); + } + if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) { + throw new RangeError('The buffer of view has different capacity than byobRequest'); + } + if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) { + throw new RangeError('The region specified by view is larger than byobRequest'); + } + var viewByteLength = view.byteLength; + firstDescriptor.buffer = TransferArrayBuffer(view.buffer); + ReadableByteStreamControllerRespondInternal(controller, viewByteLength); +} +function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) { + controller._controlledReadableByteStream = stream; + controller._pullAgain = false; + controller._pulling = false; + controller._byobRequest = null; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._closeRequested = false; + controller._started = false; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._autoAllocateChunkSize = autoAllocateChunkSize; + controller._pendingPullIntos = new SimpleQueue(); + stream._readableStreamController = controller; + var startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), function () { + controller._started = true; + ReadableByteStreamControllerCallPullIfNeeded(controller); + return null; + }, function (r) { + ReadableByteStreamControllerError(controller, r); + return null; + }); +} +function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) { + var controller = Object.create(ReadableByteStreamController.prototype); + var startAlgorithm; + var pullAlgorithm; + var cancelAlgorithm; + if (underlyingByteSource.start !== undefined) { + startAlgorithm = function () { return underlyingByteSource.start(controller); }; + } + else { + startAlgorithm = function () { return undefined; }; + } + if (underlyingByteSource.pull !== undefined) { + pullAlgorithm = function () { return underlyingByteSource.pull(controller); }; + } + else { + pullAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingByteSource.cancel !== undefined) { + cancelAlgorithm = function (reason) { return underlyingByteSource.cancel(reason); }; + } + else { + cancelAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + var autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize; + if (autoAllocateChunkSize === 0) { + throw new TypeError('autoAllocateChunkSize must be greater than 0'); + } + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize); +} +function SetUpReadableStreamBYOBRequest(request, controller, view) { + request._associatedReadableByteStreamController = controller; + request._view = view; +} +// Helper functions for the ReadableStreamBYOBRequest. +function byobRequestBrandCheckException(name) { + return new TypeError("ReadableStreamBYOBRequest.prototype.".concat(name, " can only be used on a ReadableStreamBYOBRequest")); +} +// Helper functions for the ReadableByteStreamController. +function byteStreamControllerBrandCheckException(name) { + return new TypeError("ReadableByteStreamController.prototype.".concat(name, " can only be used on a ReadableByteStreamController")); +} + +function convertReaderOptions(options, context) { + assertDictionary(options, context); + var mode = options === null || options === void 0 ? void 0 : options.mode; + return { + mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, "".concat(context, " has member 'mode' that")) + }; +} +function convertReadableStreamReaderMode(mode, context) { + mode = "".concat(mode); + if (mode !== 'byob') { + throw new TypeError("".concat(context, " '").concat(mode, "' is not a valid enumeration value for ReadableStreamReaderMode")); + } + return mode; +} +function convertByobReadOptions(options, context) { + var _a; + assertDictionary(options, context); + var min = (_a = options === null || options === void 0 ? void 0 : options.min) !== null && _a !== void 0 ? _a : 1; + return { + min: convertUnsignedLongLongWithEnforceRange(min, "".concat(context, " has member 'min' that")) + }; +} + +// Abstract operations for the ReadableStream. +function AcquireReadableStreamBYOBReader(stream) { + return new ReadableStreamBYOBReader(stream); +} +// ReadableStream API exposed for controllers. +function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) { + stream._reader._readIntoRequests.push(readIntoRequest); +} +function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) { + var reader = stream._reader; + var readIntoRequest = reader._readIntoRequests.shift(); + if (done) { + readIntoRequest._closeSteps(chunk); + } + else { + readIntoRequest._chunkSteps(chunk); + } +} +function ReadableStreamGetNumReadIntoRequests(stream) { + return stream._reader._readIntoRequests.length; +} +function ReadableStreamHasBYOBReader(stream) { + var reader = stream._reader; + if (reader === undefined) { + return false; + } + if (!IsReadableStreamBYOBReader(reader)) { + return false; + } + return true; +} +/** + * A BYOB reader vended by a {@link ReadableStream}. + * + * @public + */ +var ReadableStreamBYOBReader = /** @class */ (function () { + function ReadableStreamBYOBReader(stream) { + assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader'); + assertReadableStream(stream, 'First parameter'); + if (IsReadableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive reading by another reader'); + } + if (!IsReadableByteStreamController(stream._readableStreamController)) { + throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' + + 'source'); + } + ReadableStreamReaderGenericInitialize(this, stream); + this._readIntoRequests = new SimpleQueue(); + } + Object.defineProperty(ReadableStreamBYOBReader.prototype, "closed", { + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the reader's lock is released before the stream finishes closing. + */ + get: function () { + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('closed')); + } + return this._closedPromise; + }, + enumerable: false, + configurable: true + }); + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + ReadableStreamBYOBReader.prototype.cancel = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('cancel')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('cancel')); + } + return ReadableStreamReaderGenericCancel(this, reason); + }; + ReadableStreamBYOBReader.prototype.read = function (view, rawOptions) { + if (rawOptions === void 0) { rawOptions = {}; } + if (!IsReadableStreamBYOBReader(this)) { + return promiseRejectedWith(byobReaderBrandCheckException('read')); + } + if (!ArrayBuffer.isView(view)) { + return promiseRejectedWith(new TypeError('view must be an array buffer view')); + } + if (view.byteLength === 0) { + return promiseRejectedWith(new TypeError('view must have non-zero byteLength')); + } + if (view.buffer.byteLength === 0) { + return promiseRejectedWith(new TypeError("view's buffer must have non-zero byteLength")); + } + if (IsDetachedBuffer(view.buffer)) { + return promiseRejectedWith(new TypeError('view\'s buffer has been detached')); + } + var options; + try { + options = convertByobReadOptions(rawOptions, 'options'); + } + catch (e) { + return promiseRejectedWith(e); + } + var min = options.min; + if (min === 0) { + return promiseRejectedWith(new TypeError('options.min must be greater than 0')); + } + if (!isDataView(view)) { + if (min > view.length) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s length')); + } + } + else if (min > view.byteLength) { + return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\'s byteLength')); + } + if (this._ownerReadableStream === undefined) { + return promiseRejectedWith(readerLockException('read from')); + } + var resolvePromise; + var rejectPromise; + var promise = newPromise(function (resolve, reject) { + resolvePromise = resolve; + rejectPromise = reject; + }); + var readIntoRequest = { + _chunkSteps: function (chunk) { return resolvePromise({ value: chunk, done: false }); }, + _closeSteps: function (chunk) { return resolvePromise({ value: chunk, done: true }); }, + _errorSteps: function (e) { return rejectPromise(e); } + }; + ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest); + return promise; + }; + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + ReadableStreamBYOBReader.prototype.releaseLock = function () { + if (!IsReadableStreamBYOBReader(this)) { + throw byobReaderBrandCheckException('releaseLock'); + } + if (this._ownerReadableStream === undefined) { + return; + } + ReadableStreamBYOBReaderRelease(this); + }; + return ReadableStreamBYOBReader; +}()); +Object.defineProperties(ReadableStreamBYOBReader.prototype, { + cancel: { enumerable: true }, + read: { enumerable: true }, + releaseLock: { enumerable: true }, + closed: { enumerable: true } +}); +setFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel'); +setFunctionName(ReadableStreamBYOBReader.prototype.read, 'read'); +setFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamBYOBReader.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamBYOBReader', + configurable: true + }); +} +// Abstract operations for the readers. +function IsReadableStreamBYOBReader(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) { + return false; + } + return x instanceof ReadableStreamBYOBReader; +} +function ReadableStreamBYOBReaderRead(reader, view, min, readIntoRequest) { + var stream = reader._ownerReadableStream; + stream._disturbed = true; + if (stream._state === 'errored') { + readIntoRequest._errorSteps(stream._storedError); + } + else { + ReadableByteStreamControllerPullInto(stream._readableStreamController, view, min, readIntoRequest); + } +} +function ReadableStreamBYOBReaderRelease(reader) { + ReadableStreamReaderGenericRelease(reader); + var e = new TypeError('Reader was released'); + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); +} +function ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e) { + var readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(function (readIntoRequest) { + readIntoRequest._errorSteps(e); + }); +} +// Helper functions for the ReadableStreamBYOBReader. +function byobReaderBrandCheckException(name) { + return new TypeError("ReadableStreamBYOBReader.prototype.".concat(name, " can only be used on a ReadableStreamBYOBReader")); +} + +function ExtractHighWaterMark(strategy, defaultHWM) { + var highWaterMark = strategy.highWaterMark; + if (highWaterMark === undefined) { + return defaultHWM; + } + if (NumberIsNaN(highWaterMark) || highWaterMark < 0) { + throw new RangeError('Invalid highWaterMark'); + } + return highWaterMark; +} +function ExtractSizeAlgorithm(strategy) { + var size = strategy.size; + if (!size) { + return function () { return 1; }; + } + return size; +} + +function convertQueuingStrategy(init, context) { + assertDictionary(init, context); + var highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + var size = init === null || init === void 0 ? void 0 : init.size; + return { + highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark), + size: size === undefined ? undefined : convertQueuingStrategySize(size, "".concat(context, " has member 'size' that")) + }; +} +function convertQueuingStrategySize(fn, context) { + assertFunction(fn, context); + return function (chunk) { return convertUnrestrictedDouble(fn(chunk)); }; +} + +function convertUnderlyingSink(original, context) { + assertDictionary(original, context); + var abort = original === null || original === void 0 ? void 0 : original.abort; + var close = original === null || original === void 0 ? void 0 : original.close; + var start = original === null || original === void 0 ? void 0 : original.start; + var type = original === null || original === void 0 ? void 0 : original.type; + var write = original === null || original === void 0 ? void 0 : original.write; + return { + abort: abort === undefined ? + undefined : + convertUnderlyingSinkAbortCallback(abort, original, "".concat(context, " has member 'abort' that")), + close: close === undefined ? + undefined : + convertUnderlyingSinkCloseCallback(close, original, "".concat(context, " has member 'close' that")), + start: start === undefined ? + undefined : + convertUnderlyingSinkStartCallback(start, original, "".concat(context, " has member 'start' that")), + write: write === undefined ? + undefined : + convertUnderlyingSinkWriteCallback(write, original, "".concat(context, " has member 'write' that")), + type: type + }; +} +function convertUnderlyingSinkAbortCallback(fn, original, context) { + assertFunction(fn, context); + return function (reason) { return promiseCall(fn, original, [reason]); }; +} +function convertUnderlyingSinkCloseCallback(fn, original, context) { + assertFunction(fn, context); + return function () { return promiseCall(fn, original, []); }; +} +function convertUnderlyingSinkStartCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return reflectCall(fn, original, [controller]); }; +} +function convertUnderlyingSinkWriteCallback(fn, original, context) { + assertFunction(fn, context); + return function (chunk, controller) { return promiseCall(fn, original, [chunk, controller]); }; +} + +function assertWritableStream(x, context) { + if (!IsWritableStream(x)) { + throw new TypeError("".concat(context, " is not a WritableStream.")); + } +} + +function isAbortSignal(value) { + if (typeof value !== 'object' || value === null) { + return false; + } + try { + return typeof value.aborted === 'boolean'; + } + catch (_a) { + // AbortSignal.prototype.aborted throws if its brand check fails + return false; + } +} +var supportsAbortController = typeof AbortController === 'function'; +/** + * Construct a new AbortController, if supported by the platform. + * + * @internal + */ +function createAbortController() { + if (supportsAbortController) { + return new AbortController(); + } + return undefined; +} + +/** + * A writable stream represents a destination for data, into which you can write. + * + * @public + */ +var WritableStream = /** @class */ (function () { + function WritableStream(rawUnderlyingSink, rawStrategy) { + if (rawUnderlyingSink === void 0) { rawUnderlyingSink = {}; } + if (rawStrategy === void 0) { rawStrategy = {}; } + if (rawUnderlyingSink === undefined) { + rawUnderlyingSink = null; + } + else { + assertObject(rawUnderlyingSink, 'First parameter'); + } + var strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + var underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter'); + InitializeWritableStream(this); + var type = underlyingSink.type; + if (type !== undefined) { + throw new RangeError('Invalid type is specified'); + } + var sizeAlgorithm = ExtractSizeAlgorithm(strategy); + var highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm); + } + Object.defineProperty(WritableStream.prototype, "locked", { + /** + * Returns whether or not the writable stream is locked to a writer. + */ + get: function () { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('locked'); + } + return IsWritableStreamLocked(this); + }, + enumerable: false, + configurable: true + }); + /** + * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be + * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort + * mechanism of the underlying sink. + * + * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled + * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel + * the stream) if the stream is currently locked. + */ + WritableStream.prototype.abort = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('abort')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer')); + } + return WritableStreamAbort(this, reason); + }; + /** + * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its + * close behavior. During this time any further attempts to write will fail (without erroring the stream). + * + * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream + * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with + * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked. + */ + WritableStream.prototype.close = function () { + if (!IsWritableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$2('close')); + } + if (IsWritableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer')); + } + if (WritableStreamCloseQueuedOrInFlight(this)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamClose(this); + }; + /** + * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream + * is locked, no other writer can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to write to a stream + * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at + * the same time, which would cause the resulting written data to be unpredictable and probably useless. + */ + WritableStream.prototype.getWriter = function () { + if (!IsWritableStream(this)) { + throw streamBrandCheckException$2('getWriter'); + } + return AcquireWritableStreamDefaultWriter(this); + }; + return WritableStream; +}()); +Object.defineProperties(WritableStream.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + getWriter: { enumerable: true }, + locked: { enumerable: true } +}); +setFunctionName(WritableStream.prototype.abort, 'abort'); +setFunctionName(WritableStream.prototype.close, 'close'); +setFunctionName(WritableStream.prototype.getWriter, 'getWriter'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(WritableStream.prototype, SymbolPolyfill.toStringTag, { + value: 'WritableStream', + configurable: true + }); +} +// Abstract operations for the WritableStream. +function AcquireWritableStreamDefaultWriter(stream) { + return new WritableStreamDefaultWriter(stream); +} +// Throws if and only if startAlgorithm throws. +function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + if (highWaterMark === void 0) { highWaterMark = 1; } + if (sizeAlgorithm === void 0) { sizeAlgorithm = function () { return 1; }; } + var stream = Object.create(WritableStream.prototype); + InitializeWritableStream(stream); + var controller = Object.create(WritableStreamDefaultController.prototype); + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); + return stream; +} +function InitializeWritableStream(stream) { + stream._state = 'writable'; + // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is + // 'erroring' or 'errored'. May be set to an undefined value. + stream._storedError = undefined; + stream._writer = undefined; + // Initialize to undefined first because the constructor of the controller checks this + // variable to validate the caller. + stream._writableStreamController = undefined; + // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data + // producer without waiting for the queued writes to finish. + stream._writeRequests = new SimpleQueue(); + // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents + // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here. + stream._inFlightWriteRequest = undefined; + // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer + // has been detached. + stream._closeRequest = undefined; + // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it + // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here. + stream._inFlightCloseRequest = undefined; + // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached. + stream._pendingAbortRequest = undefined; + // The backpressure signal set by the controller. + stream._backpressure = false; +} +function IsWritableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) { + return false; + } + return x instanceof WritableStream; +} +function IsWritableStreamLocked(stream) { + if (stream._writer === undefined) { + return false; + } + return true; +} +function WritableStreamAbort(stream, reason) { + var _a; + if (stream._state === 'closed' || stream._state === 'errored') { + return promiseResolvedWith(undefined); + } + stream._writableStreamController._abortReason = reason; + (_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort(reason); + // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring', + // but it doesn't know that signaling abort runs author code that might have changed the state. + // Widen the type again by casting to WritableStreamState. + var state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseResolvedWith(undefined); + } + if (stream._pendingAbortRequest !== undefined) { + return stream._pendingAbortRequest._promise; + } + var wasAlreadyErroring = false; + if (state === 'erroring') { + wasAlreadyErroring = true; + // reason will not be used, so don't keep a reference to it. + reason = undefined; + } + var promise = newPromise(function (resolve, reject) { + stream._pendingAbortRequest = { + _promise: undefined, + _resolve: resolve, + _reject: reject, + _reason: reason, + _wasAlreadyErroring: wasAlreadyErroring + }; + }); + stream._pendingAbortRequest._promise = promise; + if (!wasAlreadyErroring) { + WritableStreamStartErroring(stream, reason); + } + return promise; +} +function WritableStreamClose(stream) { + var state = stream._state; + if (state === 'closed' || state === 'errored') { + return promiseRejectedWith(new TypeError("The stream (in ".concat(state, " state) is not in the writable state and cannot be closed"))); + } + var promise = newPromise(function (resolve, reject) { + var closeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._closeRequest = closeRequest; + }); + var writer = stream._writer; + if (writer !== undefined && stream._backpressure && state === 'writable') { + defaultWriterReadyPromiseResolve(writer); + } + WritableStreamDefaultControllerClose(stream._writableStreamController); + return promise; +} +// WritableStream API exposed for controllers. +function WritableStreamAddWriteRequest(stream) { + var promise = newPromise(function (resolve, reject) { + var writeRequest = { + _resolve: resolve, + _reject: reject + }; + stream._writeRequests.push(writeRequest); + }); + return promise; +} +function WritableStreamDealWithRejection(stream, error) { + var state = stream._state; + if (state === 'writable') { + WritableStreamStartErroring(stream, error); + return; + } + WritableStreamFinishErroring(stream); +} +function WritableStreamStartErroring(stream, reason) { + var controller = stream._writableStreamController; + stream._state = 'erroring'; + stream._storedError = reason; + var writer = stream._writer; + if (writer !== undefined) { + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason); + } + if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) { + WritableStreamFinishErroring(stream); + } +} +function WritableStreamFinishErroring(stream) { + stream._state = 'errored'; + stream._writableStreamController[ErrorSteps](); + var storedError = stream._storedError; + stream._writeRequests.forEach(function (writeRequest) { + writeRequest._reject(storedError); + }); + stream._writeRequests = new SimpleQueue(); + if (stream._pendingAbortRequest === undefined) { + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + var abortRequest = stream._pendingAbortRequest; + stream._pendingAbortRequest = undefined; + if (abortRequest._wasAlreadyErroring) { + abortRequest._reject(storedError); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return; + } + var promise = stream._writableStreamController[AbortSteps](abortRequest._reason); + uponPromise(promise, function () { + abortRequest._resolve(); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }, function (reason) { + abortRequest._reject(reason); + WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream); + return null; + }); +} +function WritableStreamFinishInFlightWrite(stream) { + stream._inFlightWriteRequest._resolve(undefined); + stream._inFlightWriteRequest = undefined; +} +function WritableStreamFinishInFlightWriteWithError(stream, error) { + stream._inFlightWriteRequest._reject(error); + stream._inFlightWriteRequest = undefined; + WritableStreamDealWithRejection(stream, error); +} +function WritableStreamFinishInFlightClose(stream) { + stream._inFlightCloseRequest._resolve(undefined); + stream._inFlightCloseRequest = undefined; + var state = stream._state; + if (state === 'erroring') { + // The error was too late to do anything, so it is ignored. + stream._storedError = undefined; + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._resolve(); + stream._pendingAbortRequest = undefined; + } + } + stream._state = 'closed'; + var writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseResolve(writer); + } +} +function WritableStreamFinishInFlightCloseWithError(stream, error) { + stream._inFlightCloseRequest._reject(error); + stream._inFlightCloseRequest = undefined; + // Never execute sink abort() after sink close(). + if (stream._pendingAbortRequest !== undefined) { + stream._pendingAbortRequest._reject(error); + stream._pendingAbortRequest = undefined; + } + WritableStreamDealWithRejection(stream, error); +} +// TODO(ricea): Fix alphabetical order. +function WritableStreamCloseQueuedOrInFlight(stream) { + if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; +} +function WritableStreamHasOperationMarkedInFlight(stream) { + if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) { + return false; + } + return true; +} +function WritableStreamMarkCloseRequestInFlight(stream) { + stream._inFlightCloseRequest = stream._closeRequest; + stream._closeRequest = undefined; +} +function WritableStreamMarkFirstWriteRequestInFlight(stream) { + stream._inFlightWriteRequest = stream._writeRequests.shift(); +} +function WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) { + if (stream._closeRequest !== undefined) { + stream._closeRequest._reject(stream._storedError); + stream._closeRequest = undefined; + } + var writer = stream._writer; + if (writer !== undefined) { + defaultWriterClosedPromiseReject(writer, stream._storedError); + } +} +function WritableStreamUpdateBackpressure(stream, backpressure) { + var writer = stream._writer; + if (writer !== undefined && backpressure !== stream._backpressure) { + if (backpressure) { + defaultWriterReadyPromiseReset(writer); + } + else { + defaultWriterReadyPromiseResolve(writer); + } + } + stream._backpressure = backpressure; +} +/** + * A default writer vended by a {@link WritableStream}. + * + * @public + */ +var WritableStreamDefaultWriter = /** @class */ (function () { + function WritableStreamDefaultWriter(stream) { + assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter'); + assertWritableStream(stream, 'First parameter'); + if (IsWritableStreamLocked(stream)) { + throw new TypeError('This stream has already been locked for exclusive writing by another writer'); + } + this._ownerWritableStream = stream; + stream._writer = this; + var state = stream._state; + if (state === 'writable') { + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) { + defaultWriterReadyPromiseInitialize(this); + } + else { + defaultWriterReadyPromiseInitializeAsResolved(this); + } + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'erroring') { + defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError); + defaultWriterClosedPromiseInitialize(this); + } + else if (state === 'closed') { + defaultWriterReadyPromiseInitializeAsResolved(this); + defaultWriterClosedPromiseInitializeAsResolved(this); + } + else { + var storedError = stream._storedError; + defaultWriterReadyPromiseInitializeAsRejected(this, storedError); + defaultWriterClosedPromiseInitializeAsRejected(this, storedError); + } + } + Object.defineProperty(WritableStreamDefaultWriter.prototype, "closed", { + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the writer’s lock is released before the stream finishes closing. + */ + get: function () { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('closed')); + } + return this._closedPromise; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(WritableStreamDefaultWriter.prototype, "desiredSize", { + /** + * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full. + * A producer can use this information to determine the right amount of data to write. + * + * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort + * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when + * the writer’s lock is released. + */ + get: function () { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('desiredSize'); + } + if (this._ownerWritableStream === undefined) { + throw defaultWriterLockException('desiredSize'); + } + return WritableStreamDefaultWriterGetDesiredSize(this); + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(WritableStreamDefaultWriter.prototype, "ready", { + /** + * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions + * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips + * back to zero or below, the getter will return a new promise that stays pending until the next transition. + * + * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become + * rejected. + */ + get: function () { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('ready')); + } + return this._readyPromise; + }, + enumerable: false, + configurable: true + }); + /** + * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}. + */ + WritableStreamDefaultWriter.prototype.abort = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('abort')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('abort')); + } + return WritableStreamDefaultWriterAbort(this, reason); + }; + /** + * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}. + */ + WritableStreamDefaultWriter.prototype.close = function () { + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('close')); + } + var stream = this._ownerWritableStream; + if (stream === undefined) { + return promiseRejectedWith(defaultWriterLockException('close')); + } + if (WritableStreamCloseQueuedOrInFlight(stream)) { + return promiseRejectedWith(new TypeError('Cannot close an already-closing stream')); + } + return WritableStreamDefaultWriterClose(this); + }; + /** + * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active. + * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from + * now on; otherwise, the writer will appear closed. + * + * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the + * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled). + * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents + * other producers from writing in an interleaved manner. + */ + WritableStreamDefaultWriter.prototype.releaseLock = function () { + if (!IsWritableStreamDefaultWriter(this)) { + throw defaultWriterBrandCheckException('releaseLock'); + } + var stream = this._ownerWritableStream; + if (stream === undefined) { + return; + } + WritableStreamDefaultWriterRelease(this); + }; + WritableStreamDefaultWriter.prototype.write = function (chunk) { + if (chunk === void 0) { chunk = undefined; } + if (!IsWritableStreamDefaultWriter(this)) { + return promiseRejectedWith(defaultWriterBrandCheckException('write')); + } + if (this._ownerWritableStream === undefined) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + return WritableStreamDefaultWriterWrite(this, chunk); + }; + return WritableStreamDefaultWriter; +}()); +Object.defineProperties(WritableStreamDefaultWriter.prototype, { + abort: { enumerable: true }, + close: { enumerable: true }, + releaseLock: { enumerable: true }, + write: { enumerable: true }, + closed: { enumerable: true }, + desiredSize: { enumerable: true }, + ready: { enumerable: true } +}); +setFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort'); +setFunctionName(WritableStreamDefaultWriter.prototype.close, 'close'); +setFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock'); +setFunctionName(WritableStreamDefaultWriter.prototype.write, 'write'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultWriter.prototype, SymbolPolyfill.toStringTag, { + value: 'WritableStreamDefaultWriter', + configurable: true + }); +} +// Abstract operations for the WritableStreamDefaultWriter. +function IsWritableStreamDefaultWriter(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultWriter; +} +// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check. +function WritableStreamDefaultWriterAbort(writer, reason) { + var stream = writer._ownerWritableStream; + return WritableStreamAbort(stream, reason); +} +function WritableStreamDefaultWriterClose(writer) { + var stream = writer._ownerWritableStream; + return WritableStreamClose(stream); +} +function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) { + var stream = writer._ownerWritableStream; + var state = stream._state; + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseResolvedWith(undefined); + } + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + return WritableStreamDefaultWriterClose(writer); +} +function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) { + if (writer._closedPromiseState === 'pending') { + defaultWriterClosedPromiseReject(writer, error); + } + else { + defaultWriterClosedPromiseResetToRejected(writer, error); + } +} +function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) { + if (writer._readyPromiseState === 'pending') { + defaultWriterReadyPromiseReject(writer, error); + } + else { + defaultWriterReadyPromiseResetToRejected(writer, error); + } +} +function WritableStreamDefaultWriterGetDesiredSize(writer) { + var stream = writer._ownerWritableStream; + var state = stream._state; + if (state === 'errored' || state === 'erroring') { + return null; + } + if (state === 'closed') { + return 0; + } + return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController); +} +function WritableStreamDefaultWriterRelease(writer) { + var stream = writer._ownerWritableStream; + var releasedError = new TypeError("Writer was released and can no longer be used to monitor the stream's closedness"); + WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError); + // The state transitions to "errored" before the sink abort() method runs, but the writer.closed promise is not + // rejected until afterwards. This means that simply testing state will not work. + WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError); + stream._writer = undefined; + writer._ownerWritableStream = undefined; +} +function WritableStreamDefaultWriterWrite(writer, chunk) { + var stream = writer._ownerWritableStream; + var controller = stream._writableStreamController; + var chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk); + if (stream !== writer._ownerWritableStream) { + return promiseRejectedWith(defaultWriterLockException('write to')); + } + var state = stream._state; + if (state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') { + return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to')); + } + if (state === 'erroring') { + return promiseRejectedWith(stream._storedError); + } + var promise = WritableStreamAddWriteRequest(stream); + WritableStreamDefaultControllerWrite(controller, chunk, chunkSize); + return promise; +} +var closeSentinel = {}; +/** + * Allows control of a {@link WritableStream | writable stream}'s state and internal queue. + * + * @public + */ +var WritableStreamDefaultController = /** @class */ (function () { + function WritableStreamDefaultController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(WritableStreamDefaultController.prototype, "abortReason", { + /** + * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted. + * + * @deprecated + * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177. + * Use {@link WritableStreamDefaultController.signal}'s `reason` instead. + */ + get: function () { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('abortReason'); + } + return this._abortReason; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(WritableStreamDefaultController.prototype, "signal", { + /** + * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted. + */ + get: function () { + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('signal'); + } + if (this._abortController === undefined) { + // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`. + // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill, + // so instead we only implement support for `signal` if we find a global `AbortController` constructor. + throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported'); + } + return this._abortController.signal; + }, + enumerable: false, + configurable: true + }); + /** + * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`. + * + * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying + * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the + * normal lifecycle of interactions with the underlying sink. + */ + WritableStreamDefaultController.prototype.error = function (e) { + if (e === void 0) { e = undefined; } + if (!IsWritableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$2('error'); + } + var state = this._controlledWritableStream._state; + if (state !== 'writable') { + // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so + // just treat it as a no-op. + return; + } + WritableStreamDefaultControllerError(this, e); + }; + /** @internal */ + WritableStreamDefaultController.prototype[AbortSteps] = function (reason) { + var result = this._abortAlgorithm(reason); + WritableStreamDefaultControllerClearAlgorithms(this); + return result; + }; + /** @internal */ + WritableStreamDefaultController.prototype[ErrorSteps] = function () { + ResetQueue(this); + }; + return WritableStreamDefaultController; +}()); +Object.defineProperties(WritableStreamDefaultController.prototype, { + abortReason: { enumerable: true }, + signal: { enumerable: true }, + error: { enumerable: true } +}); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(WritableStreamDefaultController.prototype, SymbolPolyfill.toStringTag, { + value: 'WritableStreamDefaultController', + configurable: true + }); +} +// Abstract operations implementing interface required by the WritableStream. +function IsWritableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) { + return false; + } + return x instanceof WritableStreamDefaultController; +} +function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledWritableStream = stream; + stream._writableStreamController = controller; + // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly. + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._abortReason = undefined; + controller._abortController = createAbortController(); + controller._started = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._writeAlgorithm = writeAlgorithm; + controller._closeAlgorithm = closeAlgorithm; + controller._abortAlgorithm = abortAlgorithm; + var backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + var startResult = startAlgorithm(); + var startPromise = promiseResolvedWith(startResult); + uponPromise(startPromise, function () { + controller._started = true; + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, function (r) { + controller._started = true; + WritableStreamDealWithRejection(stream, r); + return null; + }); +} +function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) { + var controller = Object.create(WritableStreamDefaultController.prototype); + var startAlgorithm; + var writeAlgorithm; + var closeAlgorithm; + var abortAlgorithm; + if (underlyingSink.start !== undefined) { + startAlgorithm = function () { return underlyingSink.start(controller); }; + } + else { + startAlgorithm = function () { return undefined; }; + } + if (underlyingSink.write !== undefined) { + writeAlgorithm = function (chunk) { return underlyingSink.write(chunk, controller); }; + } + else { + writeAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingSink.close !== undefined) { + closeAlgorithm = function () { return underlyingSink.close(); }; + } + else { + closeAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingSink.abort !== undefined) { + abortAlgorithm = function (reason) { return underlyingSink.abort(reason); }; + } + else { + abortAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm); +} +// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls. +function WritableStreamDefaultControllerClearAlgorithms(controller) { + controller._writeAlgorithm = undefined; + controller._closeAlgorithm = undefined; + controller._abortAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; +} +function WritableStreamDefaultControllerClose(controller) { + EnqueueValueWithSize(controller, closeSentinel, 0); + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); +} +function WritableStreamDefaultControllerGetChunkSize(controller, chunk) { + try { + return controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE); + return 1; + } +} +function WritableStreamDefaultControllerGetDesiredSize(controller) { + return controller._strategyHWM - controller._queueTotalSize; +} +function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) { + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE); + return; + } + var stream = controller._controlledWritableStream; + if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') { + var backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); +} +// Abstract operations for the WritableStreamDefaultController. +function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) { + var stream = controller._controlledWritableStream; + if (!controller._started) { + return; + } + if (stream._inFlightWriteRequest !== undefined) { + return; + } + var state = stream._state; + if (state === 'erroring') { + WritableStreamFinishErroring(stream); + return; + } + if (controller._queue.length === 0) { + return; + } + var value = PeekQueueValue(controller); + if (value === closeSentinel) { + WritableStreamDefaultControllerProcessClose(controller); + } + else { + WritableStreamDefaultControllerProcessWrite(controller, value); + } +} +function WritableStreamDefaultControllerErrorIfNeeded(controller, error) { + if (controller._controlledWritableStream._state === 'writable') { + WritableStreamDefaultControllerError(controller, error); + } +} +function WritableStreamDefaultControllerProcessClose(controller) { + var stream = controller._controlledWritableStream; + WritableStreamMarkCloseRequestInFlight(stream); + DequeueValue(controller); + var sinkClosePromise = controller._closeAlgorithm(); + WritableStreamDefaultControllerClearAlgorithms(controller); + uponPromise(sinkClosePromise, function () { + WritableStreamFinishInFlightClose(stream); + return null; + }, function (reason) { + WritableStreamFinishInFlightCloseWithError(stream, reason); + return null; + }); +} +function WritableStreamDefaultControllerProcessWrite(controller, chunk) { + var stream = controller._controlledWritableStream; + WritableStreamMarkFirstWriteRequestInFlight(stream); + var sinkWritePromise = controller._writeAlgorithm(chunk); + uponPromise(sinkWritePromise, function () { + WritableStreamFinishInFlightWrite(stream); + var state = stream._state; + DequeueValue(controller); + if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') { + var backpressure = WritableStreamDefaultControllerGetBackpressure(controller); + WritableStreamUpdateBackpressure(stream, backpressure); + } + WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller); + return null; + }, function (reason) { + if (stream._state === 'writable') { + WritableStreamDefaultControllerClearAlgorithms(controller); + } + WritableStreamFinishInFlightWriteWithError(stream, reason); + return null; + }); +} +function WritableStreamDefaultControllerGetBackpressure(controller) { + var desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller); + return desiredSize <= 0; +} +// A client of WritableStreamDefaultController may use these functions directly to bypass state check. +function WritableStreamDefaultControllerError(controller, error) { + var stream = controller._controlledWritableStream; + WritableStreamDefaultControllerClearAlgorithms(controller); + WritableStreamStartErroring(stream, error); +} +// Helper functions for the WritableStream. +function streamBrandCheckException$2(name) { + return new TypeError("WritableStream.prototype.".concat(name, " can only be used on a WritableStream")); +} +// Helper functions for the WritableStreamDefaultController. +function defaultControllerBrandCheckException$2(name) { + return new TypeError("WritableStreamDefaultController.prototype.".concat(name, " can only be used on a WritableStreamDefaultController")); +} +// Helper functions for the WritableStreamDefaultWriter. +function defaultWriterBrandCheckException(name) { + return new TypeError("WritableStreamDefaultWriter.prototype.".concat(name, " can only be used on a WritableStreamDefaultWriter")); +} +function defaultWriterLockException(name) { + return new TypeError('Cannot ' + name + ' a stream using a released writer'); +} +function defaultWriterClosedPromiseInitialize(writer) { + writer._closedPromise = newPromise(function (resolve, reject) { + writer._closedPromise_resolve = resolve; + writer._closedPromise_reject = reject; + writer._closedPromiseState = 'pending'; + }); +} +function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseReject(writer, reason); +} +function defaultWriterClosedPromiseInitializeAsResolved(writer) { + defaultWriterClosedPromiseInitialize(writer); + defaultWriterClosedPromiseResolve(writer); +} +function defaultWriterClosedPromiseReject(writer, reason) { + if (writer._closedPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._closedPromise); + writer._closedPromise_reject(reason); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'rejected'; +} +function defaultWriterClosedPromiseResetToRejected(writer, reason) { + defaultWriterClosedPromiseInitializeAsRejected(writer, reason); +} +function defaultWriterClosedPromiseResolve(writer) { + if (writer._closedPromise_resolve === undefined) { + return; + } + writer._closedPromise_resolve(undefined); + writer._closedPromise_resolve = undefined; + writer._closedPromise_reject = undefined; + writer._closedPromiseState = 'resolved'; +} +function defaultWriterReadyPromiseInitialize(writer) { + writer._readyPromise = newPromise(function (resolve, reject) { + writer._readyPromise_resolve = resolve; + writer._readyPromise_reject = reject; + }); + writer._readyPromiseState = 'pending'; +} +function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseReject(writer, reason); +} +function defaultWriterReadyPromiseInitializeAsResolved(writer) { + defaultWriterReadyPromiseInitialize(writer); + defaultWriterReadyPromiseResolve(writer); +} +function defaultWriterReadyPromiseReject(writer, reason) { + if (writer._readyPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(writer._readyPromise); + writer._readyPromise_reject(reason); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'rejected'; +} +function defaultWriterReadyPromiseReset(writer) { + defaultWriterReadyPromiseInitialize(writer); +} +function defaultWriterReadyPromiseResetToRejected(writer, reason) { + defaultWriterReadyPromiseInitializeAsRejected(writer, reason); +} +function defaultWriterReadyPromiseResolve(writer) { + if (writer._readyPromise_resolve === undefined) { + return; + } + writer._readyPromise_resolve(undefined); + writer._readyPromise_resolve = undefined; + writer._readyPromise_reject = undefined; + writer._readyPromiseState = 'fulfilled'; +} + +/// +function getGlobals() { + if (typeof globalThis !== 'undefined') { + return globalThis; + } + else if (typeof self !== 'undefined') { + return self; + } + else if (typeof global !== 'undefined') { + return global; + } + return undefined; +} +var globals = getGlobals(); + +/// +function isDOMExceptionConstructor(ctor) { + if (!(typeof ctor === 'function' || typeof ctor === 'object')) { + return false; + } + if (ctor.name !== 'DOMException') { + return false; + } + try { + new ctor(); + return true; + } + catch (_a) { + return false; + } +} +/** + * Support: + * - Web browsers + * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87) + */ +function getFromGlobal() { + var ctor = globals === null || globals === void 0 ? void 0 : globals.DOMException; + return isDOMExceptionConstructor(ctor) ? ctor : undefined; +} +/** + * Support: + * - All platforms + */ +function createPolyfill() { + // eslint-disable-next-line @typescript-eslint/no-shadow + var ctor = function DOMException(message, name) { + this.message = message || ''; + this.name = name || 'Error'; + if (Error.captureStackTrace) { + Error.captureStackTrace(this, this.constructor); + } + }; + setFunctionName(ctor, 'DOMException'); + ctor.prototype = Object.create(Error.prototype); + Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true }); + return ctor; +} +// eslint-disable-next-line @typescript-eslint/no-redeclare +var DOMException = getFromGlobal() || createPolyfill(); + +function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) { + var reader = AcquireReadableStreamDefaultReader(source); + var writer = AcquireWritableStreamDefaultWriter(dest); + source._disturbed = true; + var shuttingDown = false; + // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown. + var currentWrite = promiseResolvedWith(undefined); + return newPromise(function (resolve, reject) { + var abortAlgorithm; + if (signal !== undefined) { + abortAlgorithm = function () { + var error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError'); + var actions = []; + if (!preventAbort) { + actions.push(function () { + if (dest._state === 'writable') { + return WritableStreamAbort(dest, error); + } + return promiseResolvedWith(undefined); + }); + } + if (!preventCancel) { + actions.push(function () { + if (source._state === 'readable') { + return ReadableStreamCancel(source, error); + } + return promiseResolvedWith(undefined); + }); + } + shutdownWithAction(function () { return Promise.all(actions.map(function (action) { return action(); })); }, true, error); + }; + if (signal.aborted) { + abortAlgorithm(); + return; + } + signal.addEventListener('abort', abortAlgorithm); + } + // Using reader and writer, read all chunks from this and write them to dest + // - Backpressure must be enforced + // - Shutdown must stop all activity + function pipeLoop() { + return newPromise(function (resolveLoop, rejectLoop) { + function next(done) { + if (done) { + resolveLoop(); + } + else { + // Use `PerformPromiseThen` instead of `uponPromise` to avoid + // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers + PerformPromiseThen(pipeStep(), next, rejectLoop); + } + } + next(false); + }); + } + function pipeStep() { + if (shuttingDown) { + return promiseResolvedWith(true); + } + return PerformPromiseThen(writer._readyPromise, function () { + return newPromise(function (resolveRead, rejectRead) { + ReadableStreamDefaultReaderRead(reader, { + _chunkSteps: function (chunk) { + currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop); + resolveRead(false); + }, + _closeSteps: function () { return resolveRead(true); }, + _errorSteps: rejectRead + }); + }); + }); + } + // Errors must be propagated forward + isOrBecomesErrored(source, reader._closedPromise, function (storedError) { + if (!preventAbort) { + shutdownWithAction(function () { return WritableStreamAbort(dest, storedError); }, true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Errors must be propagated backward + isOrBecomesErrored(dest, writer._closedPromise, function (storedError) { + if (!preventCancel) { + shutdownWithAction(function () { return ReadableStreamCancel(source, storedError); }, true, storedError); + } + else { + shutdown(true, storedError); + } + return null; + }); + // Closing must be propagated forward + isOrBecomesClosed(source, reader._closedPromise, function () { + if (!preventClose) { + shutdownWithAction(function () { return WritableStreamDefaultWriterCloseWithErrorPropagation(writer); }); + } + else { + shutdown(); + } + return null; + }); + // Closing must be propagated backward + if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') { + var destClosed_1 = new TypeError('the destination writable stream closed before all data could be piped to it'); + if (!preventCancel) { + shutdownWithAction(function () { return ReadableStreamCancel(source, destClosed_1); }, true, destClosed_1); + } + else { + shutdown(true, destClosed_1); + } + } + setPromiseIsHandledToTrue(pipeLoop()); + function waitForWritesToFinish() { + // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait + // for that too. + var oldCurrentWrite = currentWrite; + return PerformPromiseThen(currentWrite, function () { return oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined; }); + } + function isOrBecomesErrored(stream, promise, action) { + if (stream._state === 'errored') { + action(stream._storedError); + } + else { + uponRejection(promise, action); + } + } + function isOrBecomesClosed(stream, promise, action) { + if (stream._state === 'closed') { + action(); + } + else { + uponFulfillment(promise, action); + } + } + function shutdownWithAction(action, originalIsError, originalError) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), doTheRest); + } + else { + doTheRest(); + } + function doTheRest() { + uponPromise(action(), function () { return finalize(originalIsError, originalError); }, function (newError) { return finalize(true, newError); }); + return null; + } + } + function shutdown(isError, error) { + if (shuttingDown) { + return; + } + shuttingDown = true; + if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) { + uponFulfillment(waitForWritesToFinish(), function () { return finalize(isError, error); }); + } + else { + finalize(isError, error); + } + } + function finalize(isError, error) { + WritableStreamDefaultWriterRelease(writer); + ReadableStreamReaderGenericRelease(reader); + if (signal !== undefined) { + signal.removeEventListener('abort', abortAlgorithm); + } + if (isError) { + reject(error); + } + else { + resolve(undefined); + } + return null; + } + }); +} + +/** + * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue. + * + * @public + */ +var ReadableStreamDefaultController = /** @class */ (function () { + function ReadableStreamDefaultController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(ReadableStreamDefaultController.prototype, "desiredSize", { + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying source ought to use this information to determine when and how to apply backpressure. + */ + get: function () { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('desiredSize'); + } + return ReadableStreamDefaultControllerGetDesiredSize(this); + }, + enumerable: false, + configurable: true + }); + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + ReadableStreamDefaultController.prototype.close = function () { + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('close'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits close'); + } + ReadableStreamDefaultControllerClose(this); + }; + ReadableStreamDefaultController.prototype.enqueue = function (chunk) { + if (chunk === void 0) { chunk = undefined; } + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('enqueue'); + } + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) { + throw new TypeError('The stream is not in a state that permits enqueue'); + } + return ReadableStreamDefaultControllerEnqueue(this, chunk); + }; + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + ReadableStreamDefaultController.prototype.error = function (e) { + if (e === void 0) { e = undefined; } + if (!IsReadableStreamDefaultController(this)) { + throw defaultControllerBrandCheckException$1('error'); + } + ReadableStreamDefaultControllerError(this, e); + }; + /** @internal */ + ReadableStreamDefaultController.prototype[CancelSteps] = function (reason) { + ResetQueue(this); + var result = this._cancelAlgorithm(reason); + ReadableStreamDefaultControllerClearAlgorithms(this); + return result; + }; + /** @internal */ + ReadableStreamDefaultController.prototype[PullSteps] = function (readRequest) { + var stream = this._controlledReadableStream; + if (this._queue.length > 0) { + var chunk = DequeueValue(this); + if (this._closeRequested && this._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(this); + ReadableStreamClose(stream); + } + else { + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + readRequest._chunkSteps(chunk); + } + else { + ReadableStreamAddReadRequest(stream, readRequest); + ReadableStreamDefaultControllerCallPullIfNeeded(this); + } + }; + /** @internal */ + ReadableStreamDefaultController.prototype[ReleaseSteps] = function () { + // Do nothing. + }; + return ReadableStreamDefaultController; +}()); +Object.defineProperties(ReadableStreamDefaultController.prototype, { + close: { enumerable: true }, + enqueue: { enumerable: true }, + error: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(ReadableStreamDefaultController.prototype.close, 'close'); +setFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue'); +setFunctionName(ReadableStreamDefaultController.prototype.error, 'error'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStreamDefaultController.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStreamDefaultController', + configurable: true + }); +} +// Abstract operations for the ReadableStreamDefaultController. +function IsReadableStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) { + return false; + } + return x instanceof ReadableStreamDefaultController; +} +function ReadableStreamDefaultControllerCallPullIfNeeded(controller) { + var shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller); + if (!shouldPull) { + return; + } + if (controller._pulling) { + controller._pullAgain = true; + return; + } + controller._pulling = true; + var pullPromise = controller._pullAlgorithm(); + uponPromise(pullPromise, function () { + controller._pulling = false; + if (controller._pullAgain) { + controller._pullAgain = false; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + } + return null; + }, function (e) { + ReadableStreamDefaultControllerError(controller, e); + return null; + }); +} +function ReadableStreamDefaultControllerShouldCallPull(controller) { + var stream = controller._controlledReadableStream; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return false; + } + if (!controller._started) { + return false; + } + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + return true; + } + var desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller); + if (desiredSize > 0) { + return true; + } + return false; +} +function ReadableStreamDefaultControllerClearAlgorithms(controller) { + controller._pullAlgorithm = undefined; + controller._cancelAlgorithm = undefined; + controller._strategySizeAlgorithm = undefined; +} +// A client of ReadableStreamDefaultController may use these functions directly to bypass state check. +function ReadableStreamDefaultControllerClose(controller) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + var stream = controller._controlledReadableStream; + controller._closeRequested = true; + if (controller._queue.length === 0) { + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamClose(stream); + } +} +function ReadableStreamDefaultControllerEnqueue(controller, chunk) { + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) { + return; + } + var stream = controller._controlledReadableStream; + if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) { + ReadableStreamFulfillReadRequest(stream, chunk, false); + } + else { + var chunkSize = void 0; + try { + chunkSize = controller._strategySizeAlgorithm(chunk); + } + catch (chunkSizeE) { + ReadableStreamDefaultControllerError(controller, chunkSizeE); + throw chunkSizeE; + } + try { + EnqueueValueWithSize(controller, chunk, chunkSize); + } + catch (enqueueE) { + ReadableStreamDefaultControllerError(controller, enqueueE); + throw enqueueE; + } + } + ReadableStreamDefaultControllerCallPullIfNeeded(controller); +} +function ReadableStreamDefaultControllerError(controller, e) { + var stream = controller._controlledReadableStream; + if (stream._state !== 'readable') { + return; + } + ResetQueue(controller); + ReadableStreamDefaultControllerClearAlgorithms(controller); + ReadableStreamError(stream, e); +} +function ReadableStreamDefaultControllerGetDesiredSize(controller) { + var state = controller._controlledReadableStream._state; + if (state === 'errored') { + return null; + } + if (state === 'closed') { + return 0; + } + return controller._strategyHWM - controller._queueTotalSize; +} +// This is used in the implementation of TransformStream. +function ReadableStreamDefaultControllerHasBackpressure(controller) { + if (ReadableStreamDefaultControllerShouldCallPull(controller)) { + return false; + } + return true; +} +function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) { + var state = controller._controlledReadableStream._state; + if (!controller._closeRequested && state === 'readable') { + return true; + } + return false; +} +function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + controller._controlledReadableStream = stream; + controller._queue = undefined; + controller._queueTotalSize = undefined; + ResetQueue(controller); + controller._started = false; + controller._closeRequested = false; + controller._pullAgain = false; + controller._pulling = false; + controller._strategySizeAlgorithm = sizeAlgorithm; + controller._strategyHWM = highWaterMark; + controller._pullAlgorithm = pullAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + stream._readableStreamController = controller; + var startResult = startAlgorithm(); + uponPromise(promiseResolvedWith(startResult), function () { + controller._started = true; + ReadableStreamDefaultControllerCallPullIfNeeded(controller); + return null; + }, function (r) { + ReadableStreamDefaultControllerError(controller, r); + return null; + }); +} +function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) { + var controller = Object.create(ReadableStreamDefaultController.prototype); + var startAlgorithm; + var pullAlgorithm; + var cancelAlgorithm; + if (underlyingSource.start !== undefined) { + startAlgorithm = function () { return underlyingSource.start(controller); }; + } + else { + startAlgorithm = function () { return undefined; }; + } + if (underlyingSource.pull !== undefined) { + pullAlgorithm = function () { return underlyingSource.pull(controller); }; + } + else { + pullAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (underlyingSource.cancel !== undefined) { + cancelAlgorithm = function (reason) { return underlyingSource.cancel(reason); }; + } + else { + cancelAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); +} +// Helper functions for the ReadableStreamDefaultController. +function defaultControllerBrandCheckException$1(name) { + return new TypeError("ReadableStreamDefaultController.prototype.".concat(name, " can only be used on a ReadableStreamDefaultController")); +} + +function ReadableStreamTee(stream, cloneForBranch2) { + if (IsReadableByteStreamController(stream._readableStreamController)) { + return ReadableByteStreamTee(stream); + } + return ReadableStreamDefaultTee(stream); +} +function ReadableStreamDefaultTee(stream, cloneForBranch2) { + var reader = AcquireReadableStreamDefaultReader(stream); + var reading = false; + var readAgain = false; + var canceled1 = false; + var canceled2 = false; + var reason1; + var reason2; + var branch1; + var branch2; + var resolveCancelPromise; + var cancelPromise = newPromise(function (resolve) { + resolveCancelPromise = resolve; + }); + function pullAlgorithm() { + if (reading) { + readAgain = true; + return promiseResolvedWith(undefined); + } + reading = true; + var readRequest = { + _chunkSteps: function (chunk) { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(function () { + readAgain = false; + var chunk1 = chunk; + var chunk2 = chunk; + // There is no way to access the cloning code right now in the reference implementation. + // If we add one then we'll need an implementation for serializable objects. + // if (!canceled2 && cloneForBranch2) { + // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2)); + // } + if (!canceled1) { + ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgain) { + pullAlgorithm(); + } + }); + }, + _closeSteps: function () { + reading = false; + if (!canceled1) { + ReadableStreamDefaultControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableStreamDefaultControllerClose(branch2._readableStreamController); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: function () { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + // do nothing + } + branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm); + branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm); + uponRejection(reader._closedPromise, function (r) { + ReadableStreamDefaultControllerError(branch1._readableStreamController, r); + ReadableStreamDefaultControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + return [branch1, branch2]; +} +function ReadableByteStreamTee(stream) { + var reader = AcquireReadableStreamDefaultReader(stream); + var reading = false; + var readAgainForBranch1 = false; + var readAgainForBranch2 = false; + var canceled1 = false; + var canceled2 = false; + var reason1; + var reason2; + var branch1; + var branch2; + var resolveCancelPromise; + var cancelPromise = newPromise(function (resolve) { + resolveCancelPromise = resolve; + }); + function forwardReaderError(thisReader) { + uponRejection(thisReader._closedPromise, function (r) { + if (thisReader !== reader) { + return null; + } + ReadableByteStreamControllerError(branch1._readableStreamController, r); + ReadableByteStreamControllerError(branch2._readableStreamController, r); + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + return null; + }); + } + function pullWithDefaultReader() { + if (IsReadableStreamBYOBReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamDefaultReader(stream); + forwardReaderError(reader); + } + var readRequest = { + _chunkSteps: function (chunk) { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(function () { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + var chunk1 = chunk; + var chunk2 = chunk; + if (!canceled1 && !canceled2) { + try { + chunk2 = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(branch1._readableStreamController, cloneE); + ReadableByteStreamControllerError(branch2._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + } + if (!canceled1) { + ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1); + } + if (!canceled2) { + ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: function () { + reading = false; + if (!canceled1) { + ReadableByteStreamControllerClose(branch1._readableStreamController); + } + if (!canceled2) { + ReadableByteStreamControllerClose(branch2._readableStreamController); + } + if (branch1._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch1._readableStreamController, 0); + } + if (branch2._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(branch2._readableStreamController, 0); + } + if (!canceled1 || !canceled2) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: function () { + reading = false; + } + }; + ReadableStreamDefaultReaderRead(reader, readRequest); + } + function pullWithBYOBReader(view, forBranch2) { + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamReaderGenericRelease(reader); + reader = AcquireReadableStreamBYOBReader(stream); + forwardReaderError(reader); + } + var byobBranch = forBranch2 ? branch2 : branch1; + var otherBranch = forBranch2 ? branch1 : branch2; + var readIntoRequest = { + _chunkSteps: function (chunk) { + // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using + // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let + // successful synchronously-available reads get ahead of asynchronously-available errors. + _queueMicrotask(function () { + readAgainForBranch1 = false; + readAgainForBranch2 = false; + var byobCanceled = forBranch2 ? canceled2 : canceled1; + var otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!otherCanceled) { + var clonedChunk = void 0; + try { + clonedChunk = CloneAsUint8Array(chunk); + } + catch (cloneE) { + ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE); + ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE); + resolveCancelPromise(ReadableStreamCancel(stream, cloneE)); + return; + } + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk); + } + else if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + reading = false; + if (readAgainForBranch1) { + pull1Algorithm(); + } + else if (readAgainForBranch2) { + pull2Algorithm(); + } + }); + }, + _closeSteps: function (chunk) { + reading = false; + var byobCanceled = forBranch2 ? canceled2 : canceled1; + var otherCanceled = forBranch2 ? canceled1 : canceled2; + if (!byobCanceled) { + ReadableByteStreamControllerClose(byobBranch._readableStreamController); + } + if (!otherCanceled) { + ReadableByteStreamControllerClose(otherBranch._readableStreamController); + } + if (chunk !== undefined) { + if (!byobCanceled) { + ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk); + } + if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) { + ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0); + } + } + if (!byobCanceled || !otherCanceled) { + resolveCancelPromise(undefined); + } + }, + _errorSteps: function () { + reading = false; + } + }; + ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest); + } + function pull1Algorithm() { + if (reading) { + readAgainForBranch1 = true; + return promiseResolvedWith(undefined); + } + reading = true; + var byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, false); + } + return promiseResolvedWith(undefined); + } + function pull2Algorithm() { + if (reading) { + readAgainForBranch2 = true; + return promiseResolvedWith(undefined); + } + reading = true; + var byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController); + if (byobRequest === null) { + pullWithDefaultReader(); + } + else { + pullWithBYOBReader(byobRequest._view, true); + } + return promiseResolvedWith(undefined); + } + function cancel1Algorithm(reason) { + canceled1 = true; + reason1 = reason; + if (canceled2) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function cancel2Algorithm(reason) { + canceled2 = true; + reason2 = reason; + if (canceled1) { + var compositeReason = CreateArrayFromList([reason1, reason2]); + var cancelResult = ReadableStreamCancel(stream, compositeReason); + resolveCancelPromise(cancelResult); + } + return cancelPromise; + } + function startAlgorithm() { + return; + } + branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm); + branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm); + forwardReaderError(reader); + return [branch1, branch2]; +} + +function isReadableStreamLike(stream) { + return typeIsObject(stream) && typeof stream.getReader !== 'undefined'; +} + +function ReadableStreamFrom(source) { + if (isReadableStreamLike(source)) { + return ReadableStreamFromDefaultReader(source.getReader()); + } + return ReadableStreamFromIterable(source); +} +function ReadableStreamFromIterable(asyncIterable) { + var stream; + var iteratorRecord = GetIterator(asyncIterable, 'async'); + var startAlgorithm = noop; + function pullAlgorithm() { + var nextResult; + try { + nextResult = IteratorNext(iteratorRecord); + } + catch (e) { + return promiseRejectedWith(e); + } + var nextPromise = promiseResolvedWith(nextResult); + return transformPromiseWith(nextPromise, function (iterResult) { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object'); + } + var done = IteratorComplete(iterResult); + if (done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + var value = IteratorValue(iterResult); + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + var iterator = iteratorRecord.iterator; + var returnMethod; + try { + returnMethod = GetMethod(iterator, 'return'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (returnMethod === undefined) { + return promiseResolvedWith(undefined); + } + var returnResult; + try { + returnResult = reflectCall(returnMethod, iterator, [reason]); + } + catch (e) { + return promiseRejectedWith(e); + } + var returnPromise = promiseResolvedWith(returnResult); + return transformPromiseWith(returnPromise, function (iterResult) { + if (!typeIsObject(iterResult)) { + throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object'); + } + return undefined; + }); + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; +} +function ReadableStreamFromDefaultReader(reader) { + var stream; + var startAlgorithm = noop; + function pullAlgorithm() { + var readPromise; + try { + readPromise = reader.read(); + } + catch (e) { + return promiseRejectedWith(e); + } + return transformPromiseWith(readPromise, function (readResult) { + if (!typeIsObject(readResult)) { + throw new TypeError('The promise returned by the reader.read() method must fulfill with an object'); + } + if (readResult.done) { + ReadableStreamDefaultControllerClose(stream._readableStreamController); + } + else { + var value = readResult.value; + ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value); + } + }); + } + function cancelAlgorithm(reason) { + try { + return promiseResolvedWith(reader.cancel(reason)); + } + catch (e) { + return promiseRejectedWith(e); + } + } + stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0); + return stream; +} + +function convertUnderlyingDefaultOrByteSource(source, context) { + assertDictionary(source, context); + var original = source; + var autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize; + var cancel = original === null || original === void 0 ? void 0 : original.cancel; + var pull = original === null || original === void 0 ? void 0 : original.pull; + var start = original === null || original === void 0 ? void 0 : original.start; + var type = original === null || original === void 0 ? void 0 : original.type; + return { + autoAllocateChunkSize: autoAllocateChunkSize === undefined ? + undefined : + convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, "".concat(context, " has member 'autoAllocateChunkSize' that")), + cancel: cancel === undefined ? + undefined : + convertUnderlyingSourceCancelCallback(cancel, original, "".concat(context, " has member 'cancel' that")), + pull: pull === undefined ? + undefined : + convertUnderlyingSourcePullCallback(pull, original, "".concat(context, " has member 'pull' that")), + start: start === undefined ? + undefined : + convertUnderlyingSourceStartCallback(start, original, "".concat(context, " has member 'start' that")), + type: type === undefined ? undefined : convertReadableStreamType(type, "".concat(context, " has member 'type' that")) + }; +} +function convertUnderlyingSourceCancelCallback(fn, original, context) { + assertFunction(fn, context); + return function (reason) { return promiseCall(fn, original, [reason]); }; +} +function convertUnderlyingSourcePullCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return promiseCall(fn, original, [controller]); }; +} +function convertUnderlyingSourceStartCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return reflectCall(fn, original, [controller]); }; +} +function convertReadableStreamType(type, context) { + type = "".concat(type); + if (type !== 'bytes') { + throw new TypeError("".concat(context, " '").concat(type, "' is not a valid enumeration value for ReadableStreamType")); + } + return type; +} + +function convertIteratorOptions(options, context) { + assertDictionary(options, context); + var preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + return { preventCancel: Boolean(preventCancel) }; +} + +function convertPipeOptions(options, context) { + assertDictionary(options, context); + var preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort; + var preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel; + var preventClose = options === null || options === void 0 ? void 0 : options.preventClose; + var signal = options === null || options === void 0 ? void 0 : options.signal; + if (signal !== undefined) { + assertAbortSignal(signal, "".concat(context, " has member 'signal' that")); + } + return { + preventAbort: Boolean(preventAbort), + preventCancel: Boolean(preventCancel), + preventClose: Boolean(preventClose), + signal: signal + }; +} +function assertAbortSignal(signal, context) { + if (!isAbortSignal(signal)) { + throw new TypeError("".concat(context, " is not an AbortSignal.")); + } +} + +function convertReadableWritablePair(pair, context) { + assertDictionary(pair, context); + var readable = pair === null || pair === void 0 ? void 0 : pair.readable; + assertRequiredField(readable, 'readable', 'ReadableWritablePair'); + assertReadableStream(readable, "".concat(context, " has member 'readable' that")); + var writable = pair === null || pair === void 0 ? void 0 : pair.writable; + assertRequiredField(writable, 'writable', 'ReadableWritablePair'); + assertWritableStream(writable, "".concat(context, " has member 'writable' that")); + return { readable: readable, writable: writable }; +} + +/** + * A readable stream represents a source of data, from which you can read. + * + * @public + */ +var ReadableStream = /** @class */ (function () { + function ReadableStream(rawUnderlyingSource, rawStrategy) { + if (rawUnderlyingSource === void 0) { rawUnderlyingSource = {}; } + if (rawStrategy === void 0) { rawStrategy = {}; } + if (rawUnderlyingSource === undefined) { + rawUnderlyingSource = null; + } + else { + assertObject(rawUnderlyingSource, 'First parameter'); + } + var strategy = convertQueuingStrategy(rawStrategy, 'Second parameter'); + var underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter'); + InitializeReadableStream(this); + if (underlyingSource.type === 'bytes') { + if (strategy.size !== undefined) { + throw new RangeError('The strategy for a byte stream cannot have a size function'); + } + var highWaterMark = ExtractHighWaterMark(strategy, 0); + SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark); + } + else { + var sizeAlgorithm = ExtractSizeAlgorithm(strategy); + var highWaterMark = ExtractHighWaterMark(strategy, 1); + SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm); + } + } + Object.defineProperty(ReadableStream.prototype, "locked", { + /** + * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}. + */ + get: function () { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('locked'); + } + return IsReadableStreamLocked(this); + }, + enumerable: false, + configurable: true + }); + /** + * Cancels the stream, signaling a loss of interest in the stream by a consumer. + * + * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()} + * method, which might or might not use it. + */ + ReadableStream.prototype.cancel = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('cancel')); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader')); + } + return ReadableStreamCancel(this, reason); + }; + ReadableStream.prototype.getReader = function (rawOptions) { + if (rawOptions === void 0) { rawOptions = undefined; } + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('getReader'); + } + var options = convertReaderOptions(rawOptions, 'First parameter'); + if (options.mode === undefined) { + return AcquireReadableStreamDefaultReader(this); + } + return AcquireReadableStreamBYOBReader(this); + }; + ReadableStream.prototype.pipeThrough = function (rawTransform, rawOptions) { + if (rawOptions === void 0) { rawOptions = {}; } + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('pipeThrough'); + } + assertRequiredArgument(rawTransform, 1, 'pipeThrough'); + var transform = convertReadableWritablePair(rawTransform, 'First parameter'); + var options = convertPipeOptions(rawOptions, 'Second parameter'); + if (IsReadableStreamLocked(this)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream'); + } + if (IsWritableStreamLocked(transform.writable)) { + throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream'); + } + var promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + setPromiseIsHandledToTrue(promise); + return transform.readable; + }; + ReadableStream.prototype.pipeTo = function (destination, rawOptions) { + if (rawOptions === void 0) { rawOptions = {}; } + if (!IsReadableStream(this)) { + return promiseRejectedWith(streamBrandCheckException$1('pipeTo')); + } + if (destination === undefined) { + return promiseRejectedWith("Parameter 1 is required in 'pipeTo'."); + } + if (!IsWritableStream(destination)) { + return promiseRejectedWith(new TypeError("ReadableStream.prototype.pipeTo's first argument must be a WritableStream")); + } + var options; + try { + options = convertPipeOptions(rawOptions, 'Second parameter'); + } + catch (e) { + return promiseRejectedWith(e); + } + if (IsReadableStreamLocked(this)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')); + } + if (IsWritableStreamLocked(destination)) { + return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')); + } + return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal); + }; + /** + * Tees this readable stream, returning a two-element array containing the two resulting branches as + * new {@link ReadableStream} instances. + * + * Teeing a stream will lock it, preventing any other consumer from acquiring a reader. + * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be + * propagated to the stream's underlying source. + * + * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable, + * this could allow interference between the two branches. + */ + ReadableStream.prototype.tee = function () { + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('tee'); + } + var branches = ReadableStreamTee(this); + return CreateArrayFromList(branches); + }; + ReadableStream.prototype.values = function (rawOptions) { + if (rawOptions === void 0) { rawOptions = undefined; } + if (!IsReadableStream(this)) { + throw streamBrandCheckException$1('values'); + } + var options = convertIteratorOptions(rawOptions, 'First parameter'); + return AcquireReadableStreamAsyncIterator(this, options.preventCancel); + }; + ReadableStream.prototype[SymbolAsyncIterator] = function (options) { + // Stub implementation, overridden below + return this.values(options); + }; + /** + * Creates a new ReadableStream wrapping the provided iterable or async iterable. + * + * This can be used to adapt various kinds of objects into a readable stream, + * such as an array, an async generator, or a Node.js readable stream. + */ + ReadableStream.from = function (asyncIterable) { + return ReadableStreamFrom(asyncIterable); + }; + return ReadableStream; +}()); +Object.defineProperties(ReadableStream, { + from: { enumerable: true } +}); +Object.defineProperties(ReadableStream.prototype, { + cancel: { enumerable: true }, + getReader: { enumerable: true }, + pipeThrough: { enumerable: true }, + pipeTo: { enumerable: true }, + tee: { enumerable: true }, + values: { enumerable: true }, + locked: { enumerable: true } +}); +setFunctionName(ReadableStream.from, 'from'); +setFunctionName(ReadableStream.prototype.cancel, 'cancel'); +setFunctionName(ReadableStream.prototype.getReader, 'getReader'); +setFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough'); +setFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo'); +setFunctionName(ReadableStream.prototype.tee, 'tee'); +setFunctionName(ReadableStream.prototype.values, 'values'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ReadableStream.prototype, SymbolPolyfill.toStringTag, { + value: 'ReadableStream', + configurable: true + }); +} +Object.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, { + value: ReadableStream.prototype.values, + writable: true, + configurable: true +}); +// Abstract operations for the ReadableStream. +// Throws if and only if startAlgorithm throws. +function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) { + if (highWaterMark === void 0) { highWaterMark = 1; } + if (sizeAlgorithm === void 0) { sizeAlgorithm = function () { return 1; }; } + var stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + var controller = Object.create(ReadableStreamDefaultController.prototype); + SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm); + return stream; +} +// Throws if and only if startAlgorithm throws. +function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) { + var stream = Object.create(ReadableStream.prototype); + InitializeReadableStream(stream); + var controller = Object.create(ReadableByteStreamController.prototype); + SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined); + return stream; +} +function InitializeReadableStream(stream) { + stream._state = 'readable'; + stream._reader = undefined; + stream._storedError = undefined; + stream._disturbed = false; +} +function IsReadableStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) { + return false; + } + return x instanceof ReadableStream; +} +function IsReadableStreamLocked(stream) { + if (stream._reader === undefined) { + return false; + } + return true; +} +// ReadableStream API exposed for controllers. +function ReadableStreamCancel(stream, reason) { + stream._disturbed = true; + if (stream._state === 'closed') { + return promiseResolvedWith(undefined); + } + if (stream._state === 'errored') { + return promiseRejectedWith(stream._storedError); + } + ReadableStreamClose(stream); + var reader = stream._reader; + if (reader !== undefined && IsReadableStreamBYOBReader(reader)) { + var readIntoRequests = reader._readIntoRequests; + reader._readIntoRequests = new SimpleQueue(); + readIntoRequests.forEach(function (readIntoRequest) { + readIntoRequest._closeSteps(undefined); + }); + } + var sourceCancelPromise = stream._readableStreamController[CancelSteps](reason); + return transformPromiseWith(sourceCancelPromise, noop); +} +function ReadableStreamClose(stream) { + stream._state = 'closed'; + var reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseResolve(reader); + if (IsReadableStreamDefaultReader(reader)) { + var readRequests = reader._readRequests; + reader._readRequests = new SimpleQueue(); + readRequests.forEach(function (readRequest) { + readRequest._closeSteps(); + }); + } +} +function ReadableStreamError(stream, e) { + stream._state = 'errored'; + stream._storedError = e; + var reader = stream._reader; + if (reader === undefined) { + return; + } + defaultReaderClosedPromiseReject(reader, e); + if (IsReadableStreamDefaultReader(reader)) { + ReadableStreamDefaultReaderErrorReadRequests(reader, e); + } + else { + ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e); + } +} +// Helper functions for the ReadableStream. +function streamBrandCheckException$1(name) { + return new TypeError("ReadableStream.prototype.".concat(name, " can only be used on a ReadableStream")); +} + +function convertQueuingStrategyInit(init, context) { + assertDictionary(init, context); + var highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark; + assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit'); + return { + highWaterMark: convertUnrestrictedDouble(highWaterMark) + }; +} + +// The size function must not have a prototype property nor be a constructor +var byteLengthSizeFunction = function (chunk) { + return chunk.byteLength; +}; +setFunctionName(byteLengthSizeFunction, 'size'); +/** + * A queuing strategy that counts the number of bytes in each chunk. + * + * @public + */ +var ByteLengthQueuingStrategy = /** @class */ (function () { + function ByteLengthQueuingStrategy(options) { + assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark; + } + Object.defineProperty(ByteLengthQueuingStrategy.prototype, "highWaterMark", { + /** + * Returns the high water mark provided to the constructor. + */ + get: function () { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('highWaterMark'); + } + return this._byteLengthQueuingStrategyHighWaterMark; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(ByteLengthQueuingStrategy.prototype, "size", { + /** + * Measures the size of `chunk` by returning the value of its `byteLength` property. + */ + get: function () { + if (!IsByteLengthQueuingStrategy(this)) { + throw byteLengthBrandCheckException('size'); + } + return byteLengthSizeFunction; + }, + enumerable: false, + configurable: true + }); + return ByteLengthQueuingStrategy; +}()); +Object.defineProperties(ByteLengthQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } +}); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(ByteLengthQueuingStrategy.prototype, SymbolPolyfill.toStringTag, { + value: 'ByteLengthQueuingStrategy', + configurable: true + }); +} +// Helper functions for the ByteLengthQueuingStrategy. +function byteLengthBrandCheckException(name) { + return new TypeError("ByteLengthQueuingStrategy.prototype.".concat(name, " can only be used on a ByteLengthQueuingStrategy")); +} +function IsByteLengthQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof ByteLengthQueuingStrategy; +} + +// The size function must not have a prototype property nor be a constructor +var countSizeFunction = function () { + return 1; +}; +setFunctionName(countSizeFunction, 'size'); +/** + * A queuing strategy that counts the number of chunks. + * + * @public + */ +var CountQueuingStrategy = /** @class */ (function () { + function CountQueuingStrategy(options) { + assertRequiredArgument(options, 1, 'CountQueuingStrategy'); + options = convertQueuingStrategyInit(options, 'First parameter'); + this._countQueuingStrategyHighWaterMark = options.highWaterMark; + } + Object.defineProperty(CountQueuingStrategy.prototype, "highWaterMark", { + /** + * Returns the high water mark provided to the constructor. + */ + get: function () { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('highWaterMark'); + } + return this._countQueuingStrategyHighWaterMark; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(CountQueuingStrategy.prototype, "size", { + /** + * Measures the size of `chunk` by always returning 1. + * This ensures that the total queue size is a count of the number of chunks in the queue. + */ + get: function () { + if (!IsCountQueuingStrategy(this)) { + throw countBrandCheckException('size'); + } + return countSizeFunction; + }, + enumerable: false, + configurable: true + }); + return CountQueuingStrategy; +}()); +Object.defineProperties(CountQueuingStrategy.prototype, { + highWaterMark: { enumerable: true }, + size: { enumerable: true } +}); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(CountQueuingStrategy.prototype, SymbolPolyfill.toStringTag, { + value: 'CountQueuingStrategy', + configurable: true + }); +} +// Helper functions for the CountQueuingStrategy. +function countBrandCheckException(name) { + return new TypeError("CountQueuingStrategy.prototype.".concat(name, " can only be used on a CountQueuingStrategy")); +} +function IsCountQueuingStrategy(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) { + return false; + } + return x instanceof CountQueuingStrategy; +} + +function convertTransformer(original, context) { + assertDictionary(original, context); + var cancel = original === null || original === void 0 ? void 0 : original.cancel; + var flush = original === null || original === void 0 ? void 0 : original.flush; + var readableType = original === null || original === void 0 ? void 0 : original.readableType; + var start = original === null || original === void 0 ? void 0 : original.start; + var transform = original === null || original === void 0 ? void 0 : original.transform; + var writableType = original === null || original === void 0 ? void 0 : original.writableType; + return { + cancel: cancel === undefined ? + undefined : + convertTransformerCancelCallback(cancel, original, "".concat(context, " has member 'cancel' that")), + flush: flush === undefined ? + undefined : + convertTransformerFlushCallback(flush, original, "".concat(context, " has member 'flush' that")), + readableType: readableType, + start: start === undefined ? + undefined : + convertTransformerStartCallback(start, original, "".concat(context, " has member 'start' that")), + transform: transform === undefined ? + undefined : + convertTransformerTransformCallback(transform, original, "".concat(context, " has member 'transform' that")), + writableType: writableType + }; +} +function convertTransformerFlushCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return promiseCall(fn, original, [controller]); }; +} +function convertTransformerStartCallback(fn, original, context) { + assertFunction(fn, context); + return function (controller) { return reflectCall(fn, original, [controller]); }; +} +function convertTransformerTransformCallback(fn, original, context) { + assertFunction(fn, context); + return function (chunk, controller) { return promiseCall(fn, original, [chunk, controller]); }; +} +function convertTransformerCancelCallback(fn, original, context) { + assertFunction(fn, context); + return function (reason) { return promiseCall(fn, original, [reason]); }; +} + +// Class TransformStream +/** + * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream}, + * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side. + * In a manner specific to the transform stream in question, writes to the writable side result in new data being + * made available for reading from the readable side. + * + * @public + */ +var TransformStream = /** @class */ (function () { + function TransformStream(rawTransformer, rawWritableStrategy, rawReadableStrategy) { + if (rawTransformer === void 0) { rawTransformer = {}; } + if (rawWritableStrategy === void 0) { rawWritableStrategy = {}; } + if (rawReadableStrategy === void 0) { rawReadableStrategy = {}; } + if (rawTransformer === undefined) { + rawTransformer = null; + } + var writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter'); + var readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter'); + var transformer = convertTransformer(rawTransformer, 'First parameter'); + if (transformer.readableType !== undefined) { + throw new RangeError('Invalid readableType specified'); + } + if (transformer.writableType !== undefined) { + throw new RangeError('Invalid writableType specified'); + } + var readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0); + var readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy); + var writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1); + var writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy); + var startPromise_resolve; + var startPromise = newPromise(function (resolve) { + startPromise_resolve = resolve; + }); + InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + SetUpTransformStreamDefaultControllerFromTransformer(this, transformer); + if (transformer.start !== undefined) { + startPromise_resolve(transformer.start(this._transformStreamController)); + } + else { + startPromise_resolve(undefined); + } + } + Object.defineProperty(TransformStream.prototype, "readable", { + /** + * The readable side of the transform stream. + */ + get: function () { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('readable'); + } + return this._readable; + }, + enumerable: false, + configurable: true + }); + Object.defineProperty(TransformStream.prototype, "writable", { + /** + * The writable side of the transform stream. + */ + get: function () { + if (!IsTransformStream(this)) { + throw streamBrandCheckException('writable'); + } + return this._writable; + }, + enumerable: false, + configurable: true + }); + return TransformStream; +}()); +Object.defineProperties(TransformStream.prototype, { + readable: { enumerable: true }, + writable: { enumerable: true } +}); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(TransformStream.prototype, SymbolPolyfill.toStringTag, { + value: 'TransformStream', + configurable: true + }); +} +function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) { + function startAlgorithm() { + return startPromise; + } + function writeAlgorithm(chunk) { + return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk); + } + function abortAlgorithm(reason) { + return TransformStreamDefaultSinkAbortAlgorithm(stream, reason); + } + function closeAlgorithm() { + return TransformStreamDefaultSinkCloseAlgorithm(stream); + } + stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm); + function pullAlgorithm() { + return TransformStreamDefaultSourcePullAlgorithm(stream); + } + function cancelAlgorithm(reason) { + return TransformStreamDefaultSourceCancelAlgorithm(stream, reason); + } + stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm); + // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure. + stream._backpressure = undefined; + stream._backpressureChangePromise = undefined; + stream._backpressureChangePromise_resolve = undefined; + TransformStreamSetBackpressure(stream, true); + stream._transformStreamController = undefined; +} +function IsTransformStream(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) { + return false; + } + return x instanceof TransformStream; +} +// This is a no-op if both sides are already errored. +function TransformStreamError(stream, e) { + ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e); + TransformStreamErrorWritableAndUnblockWrite(stream, e); +} +function TransformStreamErrorWritableAndUnblockWrite(stream, e) { + TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController); + WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e); + TransformStreamUnblockWrite(stream); +} +function TransformStreamUnblockWrite(stream) { + if (stream._backpressure) { + // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure() + // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time + // _backpressure is set. + TransformStreamSetBackpressure(stream, false); + } +} +function TransformStreamSetBackpressure(stream, backpressure) { + // Passes also when called during construction. + if (stream._backpressureChangePromise !== undefined) { + stream._backpressureChangePromise_resolve(); + } + stream._backpressureChangePromise = newPromise(function (resolve) { + stream._backpressureChangePromise_resolve = resolve; + }); + stream._backpressure = backpressure; +} +// Class TransformStreamDefaultController +/** + * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}. + * + * @public + */ +var TransformStreamDefaultController = /** @class */ (function () { + function TransformStreamDefaultController() { + throw new TypeError('Illegal constructor'); + } + Object.defineProperty(TransformStreamDefaultController.prototype, "desiredSize", { + /** + * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full. + */ + get: function () { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('desiredSize'); + } + var readableController = this._controlledTransformStream._readable._readableStreamController; + return ReadableStreamDefaultControllerGetDesiredSize(readableController); + }, + enumerable: false, + configurable: true + }); + TransformStreamDefaultController.prototype.enqueue = function (chunk) { + if (chunk === void 0) { chunk = undefined; } + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('enqueue'); + } + TransformStreamDefaultControllerEnqueue(this, chunk); + }; + /** + * Errors both the readable side and the writable side of the controlled transform stream, making all future + * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded. + */ + TransformStreamDefaultController.prototype.error = function (reason) { + if (reason === void 0) { reason = undefined; } + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('error'); + } + TransformStreamDefaultControllerError(this, reason); + }; + /** + * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the + * transformer only needs to consume a portion of the chunks written to the writable side. + */ + TransformStreamDefaultController.prototype.terminate = function () { + if (!IsTransformStreamDefaultController(this)) { + throw defaultControllerBrandCheckException('terminate'); + } + TransformStreamDefaultControllerTerminate(this); + }; + return TransformStreamDefaultController; +}()); +Object.defineProperties(TransformStreamDefaultController.prototype, { + enqueue: { enumerable: true }, + error: { enumerable: true }, + terminate: { enumerable: true }, + desiredSize: { enumerable: true } +}); +setFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue'); +setFunctionName(TransformStreamDefaultController.prototype.error, 'error'); +setFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate'); +if (typeof SymbolPolyfill.toStringTag === 'symbol') { + Object.defineProperty(TransformStreamDefaultController.prototype, SymbolPolyfill.toStringTag, { + value: 'TransformStreamDefaultController', + configurable: true + }); +} +// Transform Stream Default Controller Abstract Operations +function IsTransformStreamDefaultController(x) { + if (!typeIsObject(x)) { + return false; + } + if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) { + return false; + } + return x instanceof TransformStreamDefaultController; +} +function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm) { + controller._controlledTransformStream = stream; + stream._transformStreamController = controller; + controller._transformAlgorithm = transformAlgorithm; + controller._flushAlgorithm = flushAlgorithm; + controller._cancelAlgorithm = cancelAlgorithm; + controller._finishPromise = undefined; + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) { + var controller = Object.create(TransformStreamDefaultController.prototype); + var transformAlgorithm; + var flushAlgorithm; + var cancelAlgorithm; + if (transformer.transform !== undefined) { + transformAlgorithm = function (chunk) { return transformer.transform(chunk, controller); }; + } + else { + transformAlgorithm = function (chunk) { + try { + TransformStreamDefaultControllerEnqueue(controller, chunk); + return promiseResolvedWith(undefined); + } + catch (transformResultE) { + return promiseRejectedWith(transformResultE); + } + }; + } + if (transformer.flush !== undefined) { + flushAlgorithm = function () { return transformer.flush(controller); }; + } + else { + flushAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + if (transformer.cancel !== undefined) { + cancelAlgorithm = function (reason) { return transformer.cancel(reason); }; + } + else { + cancelAlgorithm = function () { return promiseResolvedWith(undefined); }; + } + SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm); +} +function TransformStreamDefaultControllerClearAlgorithms(controller) { + controller._transformAlgorithm = undefined; + controller._flushAlgorithm = undefined; + controller._cancelAlgorithm = undefined; +} +function TransformStreamDefaultControllerEnqueue(controller, chunk) { + var stream = controller._controlledTransformStream; + var readableController = stream._readable._readableStreamController; + if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) { + throw new TypeError('Readable side is not in a state that permits enqueue'); + } + // We throttle transform invocations based on the backpressure of the ReadableStream, but we still + // accept TransformStreamDefaultControllerEnqueue() calls. + try { + ReadableStreamDefaultControllerEnqueue(readableController, chunk); + } + catch (e) { + // This happens when readableStrategy.size() throws. + TransformStreamErrorWritableAndUnblockWrite(stream, e); + throw stream._readable._storedError; + } + var backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController); + if (backpressure !== stream._backpressure) { + TransformStreamSetBackpressure(stream, true); + } +} +function TransformStreamDefaultControllerError(controller, e) { + TransformStreamError(controller._controlledTransformStream, e); +} +function TransformStreamDefaultControllerPerformTransform(controller, chunk) { + var transformPromise = controller._transformAlgorithm(chunk); + return transformPromiseWith(transformPromise, undefined, function (r) { + TransformStreamError(controller._controlledTransformStream, r); + throw r; + }); +} +function TransformStreamDefaultControllerTerminate(controller) { + var stream = controller._controlledTransformStream; + var readableController = stream._readable._readableStreamController; + ReadableStreamDefaultControllerClose(readableController); + var error = new TypeError('TransformStream terminated'); + TransformStreamErrorWritableAndUnblockWrite(stream, error); +} +// TransformStreamDefaultSink Algorithms +function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) { + var controller = stream._transformStreamController; + if (stream._backpressure) { + var backpressureChangePromise = stream._backpressureChangePromise; + return transformPromiseWith(backpressureChangePromise, function () { + var writable = stream._writable; + var state = writable._state; + if (state === 'erroring') { + throw writable._storedError; + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); + }); + } + return TransformStreamDefaultControllerPerformTransform(controller, chunk); +} +function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) { + var controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + var readable = stream._readable; + // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally, + // we don't run the _cancelAlgorithm again. + controller._finishPromise = newPromise(function (resolve, reject) { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + var cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, function () { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerError(readable._readableStreamController, reason); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, function (r) { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +function TransformStreamDefaultSinkCloseAlgorithm(stream) { + var controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._readable cannot change after construction, so caching it across a call to user code is safe. + var readable = stream._readable; + // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally, + // we don't also run the _cancelAlgorithm. + controller._finishPromise = newPromise(function (resolve, reject) { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + var flushPromise = controller._flushAlgorithm(); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(flushPromise, function () { + if (readable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, readable._storedError); + } + else { + ReadableStreamDefaultControllerClose(readable._readableStreamController); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, function (r) { + ReadableStreamDefaultControllerError(readable._readableStreamController, r); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +// TransformStreamDefaultSource Algorithms +function TransformStreamDefaultSourcePullAlgorithm(stream) { + // Invariant. Enforced by the promises returned by start() and pull(). + TransformStreamSetBackpressure(stream, false); + // Prevent the next pull() call until there is backpressure. + return stream._backpressureChangePromise; +} +function TransformStreamDefaultSourceCancelAlgorithm(stream, reason) { + var controller = stream._transformStreamController; + if (controller._finishPromise !== undefined) { + return controller._finishPromise; + } + // stream._writable cannot change after construction, so caching it across a call to user code is safe. + var writable = stream._writable; + // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or + // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the + // _flushAlgorithm. + controller._finishPromise = newPromise(function (resolve, reject) { + controller._finishPromise_resolve = resolve; + controller._finishPromise_reject = reject; + }); + var cancelPromise = controller._cancelAlgorithm(reason); + TransformStreamDefaultControllerClearAlgorithms(controller); + uponPromise(cancelPromise, function () { + if (writable._state === 'errored') { + defaultControllerFinishPromiseReject(controller, writable._storedError); + } + else { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseResolve(controller); + } + return null; + }, function (r) { + WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r); + TransformStreamUnblockWrite(stream); + defaultControllerFinishPromiseReject(controller, r); + return null; + }); + return controller._finishPromise; +} +// Helper functions for the TransformStreamDefaultController. +function defaultControllerBrandCheckException(name) { + return new TypeError("TransformStreamDefaultController.prototype.".concat(name, " can only be used on a TransformStreamDefaultController")); +} +function defaultControllerFinishPromiseResolve(controller) { + if (controller._finishPromise_resolve === undefined) { + return; + } + controller._finishPromise_resolve(); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +function defaultControllerFinishPromiseReject(controller, reason) { + if (controller._finishPromise_reject === undefined) { + return; + } + setPromiseIsHandledToTrue(controller._finishPromise); + controller._finishPromise_reject(reason); + controller._finishPromise_resolve = undefined; + controller._finishPromise_reject = undefined; +} +// Helper functions for the TransformStream. +function streamBrandCheckException(name) { + return new TypeError("TransformStream.prototype.".concat(name, " can only be used on a TransformStream")); +} + +export { ByteLengthQueuingStrategy, CountQueuingStrategy, ReadableByteStreamController, ReadableStream, ReadableStreamBYOBReader, ReadableStreamBYOBRequest, ReadableStreamDefaultController, ReadableStreamDefaultReader, TransformStream, TransformStreamDefaultController, WritableStream, WritableStreamDefaultController, WritableStreamDefaultWriter }; +//# sourceMappingURL=ponyfill.mjs.map diff --git a/node_modules/web-streams-polyfill/dist/ponyfill.mjs.map b/node_modules/web-streams-polyfill/dist/ponyfill.mjs.map new file mode 100644 index 00000000..d7df2bd4 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/ponyfill.mjs.map @@ -0,0 +1 @@ +{"version":3,"file":"ponyfill.mjs","sources":["../src/stub/symbol.ts","../node_modules/tslib/tslib.es6.js","../src/utils.ts","../src/lib/helpers/miscellaneous.ts","../src/lib/helpers/webidl.ts","../src/lib/simple-queue.ts","../src/lib/abstract-ops/internal-methods.ts","../src/lib/readable-stream/generic-reader.ts","../src/stub/number-isfinite.ts","../src/stub/math-trunc.ts","../src/lib/validators/basic.ts","../src/lib/validators/readable-stream.ts","../src/lib/readable-stream/default-reader.ts","../src/lib/abstract-ops/ecmascript.ts","../src/target/es5/stub/async-iterator-prototype.ts","../src/lib/readable-stream/async-iterator.ts","../src/stub/number-isnan.ts","../src/lib/abstract-ops/miscellaneous.ts","../src/lib/abstract-ops/queue-with-sizes.ts","../src/lib/helpers/array-buffer-view.ts","../src/lib/readable-stream/byte-stream-controller.ts","../src/lib/validators/reader-options.ts","../src/lib/readable-stream/byob-reader.ts","../src/lib/abstract-ops/queuing-strategy.ts","../src/lib/validators/queuing-strategy.ts","../src/lib/validators/underlying-sink.ts","../src/lib/validators/writable-stream.ts","../src/lib/abort-signal.ts","../src/lib/writable-stream.ts","../src/globals.ts","../src/stub/dom-exception.ts","../src/lib/readable-stream/pipe.ts","../src/lib/readable-stream/default-controller.ts","../src/lib/readable-stream/tee.ts","../src/lib/readable-stream/readable-stream-like.ts","../src/lib/readable-stream/from.ts","../src/lib/validators/underlying-source.ts","../src/lib/validators/iterator-options.ts","../src/lib/validators/pipe-options.ts","../src/lib/validators/readable-writable-pair.ts","../src/lib/readable-stream.ts","../src/lib/validators/queuing-strategy-init.ts","../src/lib/byte-length-queuing-strategy.ts","../src/lib/count-queuing-strategy.ts","../src/lib/validators/transformer.ts","../src/lib/transform-stream.ts"],"sourcesContent":["/// \n\nconst SymbolPolyfill: (description?: string) => symbol =\n typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ?\n Symbol :\n description => `Symbol(${description})` as any as symbol;\n\nexport default SymbolPolyfill;\n","/******************************************************************************\r\nCopyright (c) Microsoft Corporation.\r\n\r\nPermission to use, copy, modify, and/or distribute this software for any\r\npurpose with or without fee is hereby granted.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\r\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY\r\nAND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\r\n***************************************************************************** */\r\n/* global Reflect, Promise, SuppressedError, Symbol */\r\n\r\nvar extendStatics = function(d, b) {\r\n extendStatics = Object.setPrototypeOf ||\r\n ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\r\n return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n if (typeof b !== \"function\" && b !== null)\r\n throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\r\n extendStatics(d, b);\r\n function __() { this.constructor = d; }\r\n d.prototype = b === null ? 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(this.v = v, this) : new __await(v);\r\n}\r\n\r\nexport function __asyncGenerator(thisArg, _arguments, generator) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var g = generator.apply(thisArg, _arguments || []), i, q = [];\r\n return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\r\n function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\r\n function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\r\n function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n function fulfill(value) { resume(\"next\", value); }\r\n function reject(value) { resume(\"throw\", value); }\r\n function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n var i, p;\r\n return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var m = o[Symbol.asyncIterator], i;\r\n return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n return cooked;\r\n};\r\n\r\nvar __setModuleDefault = Object.create ? (function(o, v) {\r\n Object.defineProperty(o, \"default\", { enumerable: true, value: v });\r\n}) : function(o, v) {\r\n o[\"default\"] = v;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n if (mod && mod.__esModule) return mod;\r\n var result = {};\r\n if (mod != null) for (var k in mod) if (k !== \"default\" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);\r\n __setModuleDefault(result, mod);\r\n return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n\r\nexport function __classPrivateFieldGet(receiver, state, kind, f) {\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a getter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot read private member from an object whose class did not declare it\");\r\n return kind === \"m\" ? f : kind === \"a\" ? f.call(receiver) : f ? f.value : state.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, state, value, kind, f) {\r\n if (kind === \"m\") throw new TypeError(\"Private method is not writable\");\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a setter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot write private member to an object whose class did not declare it\");\r\n return (kind === \"a\" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;\r\n}\r\n\r\nexport function __classPrivateFieldIn(state, receiver) {\r\n if (receiver === null || (typeof receiver !== \"object\" && typeof receiver !== \"function\")) throw new TypeError(\"Cannot use 'in' operator on non-object\");\r\n return typeof state === \"function\" ? receiver === state : state.has(receiver);\r\n}\r\n\r\nexport function __addDisposableResource(env, value, async) {\r\n if (value !== null && value !== void 0) {\r\n if (typeof value !== \"object\" && typeof value !== \"function\") throw new TypeError(\"Object expected.\");\r\n var dispose;\r\n if (async) {\r\n if (!Symbol.asyncDispose) throw new TypeError(\"Symbol.asyncDispose is not defined.\");\r\n dispose = value[Symbol.asyncDispose];\r\n }\r\n if (dispose === void 0) {\r\n if (!Symbol.dispose) throw new TypeError(\"Symbol.dispose is not defined.\");\r\n dispose = value[Symbol.dispose];\r\n }\r\n if (typeof dispose !== \"function\") throw new TypeError(\"Object not disposable.\");\r\n env.stack.push({ value: value, dispose: dispose, async: async });\r\n }\r\n else if (async) {\r\n env.stack.push({ async: true });\r\n }\r\n return value;\r\n}\r\n\r\nvar _SuppressedError = typeof SuppressedError === \"function\" ? SuppressedError : function (error, suppressed, message) {\r\n var e = new Error(message);\r\n return e.name = \"SuppressedError\", e.error = error, e.suppressed = suppressed, e;\r\n};\r\n\r\nexport function __disposeResources(env) {\r\n function fail(e) {\r\n env.error = env.hasError ? new _SuppressedError(e, env.error, \"An error was suppressed during disposal.\") : e;\r\n env.hasError = true;\r\n }\r\n function next() {\r\n while (env.stack.length) {\r\n var rec = env.stack.pop();\r\n try {\r\n var result = rec.dispose && rec.dispose.call(rec.value);\r\n if (rec.async) return Promise.resolve(result).then(next, function(e) { fail(e); return next(); });\r\n }\r\n catch (e) {\r\n fail(e);\r\n }\r\n }\r\n if (env.hasError) throw env.error;\r\n }\r\n return next();\r\n}\r\n\r\nexport default {\r\n __extends: __extends,\r\n __assign: __assign,\r\n __rest: __rest,\r\n __decorate: __decorate,\r\n __param: __param,\r\n __metadata: __metadata,\r\n __awaiter: __awaiter,\r\n __generator: __generator,\r\n __createBinding: __createBinding,\r\n __exportStar: __exportStar,\r\n __values: __values,\r\n __read: __read,\r\n __spread: __spread,\r\n __spreadArrays: __spreadArrays,\r\n __spreadArray: __spreadArray,\r\n __await: __await,\r\n __asyncGenerator: __asyncGenerator,\r\n __asyncDelegator: __asyncDelegator,\r\n __asyncValues: __asyncValues,\r\n __makeTemplateObject: __makeTemplateObject,\r\n __importStar: __importStar,\r\n __importDefault: __importDefault,\r\n __classPrivateFieldGet: __classPrivateFieldGet,\r\n __classPrivateFieldSet: __classPrivateFieldSet,\r\n __classPrivateFieldIn: __classPrivateFieldIn,\r\n __addDisposableResource: __addDisposableResource,\r\n __disposeResources: __disposeResources,\r\n};\r\n","export function noop(): undefined {\n return undefined;\n}\n","import { noop } from '../../utils';\nimport { AssertionError } from '../../stub/assert';\n\nexport function typeIsObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport const rethrowAssertionErrorRejection: (e: any) => void =\n DEBUG ? e => {\n // Used throughout the reference implementation, as `.catch(rethrowAssertionErrorRejection)`, to ensure any errors\n // get shown. There are places in the spec where we do promise transformations and purposefully ignore or don't\n // expect any errors, but assertion errors are always problematic.\n if (e && e instanceof AssertionError) {\n setTimeout(() => {\n throw e;\n }, 0);\n }\n } : noop;\n\nexport function setFunctionName(fn: Function, name: string): void {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n } catch {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n}\n","import { rethrowAssertionErrorRejection } from './miscellaneous';\nimport assert from '../../stub/assert';\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\n\n// https://webidl.spec.whatwg.org/#a-new-promise\nexport function newPromise(executor: (\n resolve: (value: T | PromiseLike) => void,\n reject: (reason?: any) => void\n) => void): Promise {\n return new originalPromise(executor);\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-resolved-with\nexport function promiseResolvedWith(value: T | PromiseLike): Promise {\n return newPromise(resolve => resolve(value));\n}\n\n// https://webidl.spec.whatwg.org/#a-promise-rejected-with\nexport function promiseRejectedWith(reason: any): Promise {\n return originalPromiseReject(reason);\n}\n\nexport function PerformPromiseThen(\n promise: Promise,\n onFulfilled?: (value: T) => TResult1 | PromiseLike,\n onRejected?: (reason: any) => TResult2 | PromiseLike): Promise {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected) as Promise;\n}\n\n// Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n// from that handler. To prevent this, return null instead of void from all handlers.\n// http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\nexport function uponPromise(\n promise: Promise,\n onFulfilled?: (value: T) => null | PromiseLike,\n onRejected?: (reason: any) => null | PromiseLike): void {\n PerformPromiseThen(\n PerformPromiseThen(promise, onFulfilled, onRejected),\n undefined,\n rethrowAssertionErrorRejection\n );\n}\n\nexport function uponFulfillment(promise: Promise, onFulfilled: (value: T) => null | PromiseLike): void {\n uponPromise(promise, onFulfilled);\n}\n\nexport function uponRejection(promise: Promise, onRejected: (reason: any) => null | PromiseLike): void {\n uponPromise(promise, undefined, onRejected);\n}\n\nexport function transformPromiseWith(\n promise: Promise,\n fulfillmentHandler?: (value: T) => TResult1 | PromiseLike,\n rejectionHandler?: (reason: any) => TResult2 | PromiseLike): Promise {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\n\nexport function setPromiseIsHandledToTrue(promise: Promise): void {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\n\nlet _queueMicrotask: (callback: () => void) => void = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n } else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n};\n\nexport { _queueMicrotask as queueMicrotask };\n\nexport function reflectCall(F: (this: T, ...fnArgs: A) => R, V: T, args: A): R {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n}\n\nexport function promiseCall(F: (this: T, ...fnArgs: A) => R | PromiseLike,\n V: T,\n args: A): Promise {\n assert(typeof F === 'function');\n assert(V !== undefined);\n assert(Array.isArray(args));\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n } catch (value) {\n return promiseRejectedWith(value);\n }\n}\n","import assert from '../stub/assert';\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n\ninterface Node {\n _elements: T[];\n _next: Node | undefined;\n}\n\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nexport class SimpleQueue {\n private _front: Node;\n private _back: Node;\n private _cursor = 0;\n private _size = 0;\n\n constructor() {\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n\n get length(): number {\n return this._size;\n }\n\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element: T): void {\n const oldBack = this._back;\n let newBack = oldBack;\n assert(oldBack._next === undefined);\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n assert(elements.length === QUEUE_MAX_ARRAY_SIZE);\n assert(oldFront._next !== undefined);\n newFront = oldFront._next!;\n newCursor = 0;\n }\n\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined!;\n\n return element;\n }\n\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback: (element: T) => void): void {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n assert(node._next !== undefined);\n assert(i === QUEUE_MAX_ARRAY_SIZE);\n node = node._next!;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek(): T {\n assert(this._size > 0); // must not be called on an empty queue\n\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n}\n","export const AbortSteps = Symbol('[[AbortSteps]]');\nexport const ErrorSteps = Symbol('[[ErrorSteps]]');\nexport const CancelSteps = Symbol('[[CancelSteps]]');\nexport const PullSteps = Symbol('[[PullSteps]]');\nexport const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n","import assert from '../../stub/assert';\nimport { ReadableStream, ReadableStreamCancel, type ReadableStreamReader } from '../readable-stream';\nimport { newPromise, setPromiseIsHandledToTrue } from '../helpers/webidl';\nimport { ReleaseSteps } from '../abstract-ops/internal-methods';\n\nexport function ReadableStreamReaderGenericInitialize(reader: ReadableStreamReader, stream: ReadableStream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n } else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n } else {\n assert(stream._state === 'errored');\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n}\n\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\n\nexport function ReadableStreamReaderGenericCancel(reader: ReadableStreamReader, reason: any): Promise {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n return ReadableStreamCancel(stream, reason);\n}\n\nexport function ReadableStreamReaderGenericRelease(reader: ReadableStreamReader) {\n const stream = reader._ownerReadableStream;\n assert(stream !== undefined);\n assert(stream._reader === reader);\n\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n } else {\n defaultReaderClosedPromiseResetToRejected(\n reader,\n new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n\n stream._readableStreamController[ReleaseSteps]();\n\n stream._reader = undefined;\n reader._ownerReadableStream = undefined!;\n}\n\n// Helper functions for the readers.\n\nexport function readerLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nexport function defaultReaderClosedPromiseInitialize(reader: ReadableStreamReader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n}\n\nexport function defaultReaderClosedPromiseInitializeAsRejected(reader: ReadableStreamReader, reason: any) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseInitializeAsResolved(reader: ReadableStreamReader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n}\n\nexport function defaultReaderClosedPromiseReject(reader: ReadableStreamReader, reason: any) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n\nexport function defaultReaderClosedPromiseResetToRejected(reader: ReadableStreamReader, reason: any) {\n assert(reader._closedPromise_resolve === undefined);\n assert(reader._closedPromise_reject === undefined);\n\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\n\nexport function defaultReaderClosedPromiseResolve(reader: ReadableStreamReader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite: typeof Number.isFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n};\n\nexport default NumberIsFinite;\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc: typeof Math.trunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\nexport default MathTrunc;\n","import NumberIsFinite from '../../stub/number-isfinite';\nimport MathTrunc from '../../stub/math-trunc';\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nexport function isDictionary(x: any): x is object | null {\n return typeof x === 'object' || typeof x === 'function';\n}\n\nexport function assertDictionary(obj: unknown,\n context: string): asserts obj is object | null | undefined {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport type AnyFunction = (...args: any[]) => any;\n\n// https://heycam.github.io/webidl/#idl-callback-functions\nexport function assertFunction(x: unknown, context: string): asserts x is AnyFunction {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-object\nexport function isObject(x: any): x is object {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\n\nexport function assertObject(x: unknown,\n context: string): asserts x is object {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n}\n\nexport function assertRequiredArgument(x: T | undefined,\n position: number,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n}\n\nexport function assertRequiredField(x: T | undefined,\n field: string,\n context: string): asserts x is T {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n}\n\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nexport function convertUnrestrictedDouble(value: unknown): number {\n return Number(value);\n}\n\nfunction censorNegativeZero(x: number): number {\n return x === 0 ? 0 : x;\n}\n\nfunction integerPart(x: number): number {\n return censorNegativeZero(MathTrunc(x));\n}\n\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nexport function convertUnsignedLongLongWithEnforceRange(value: unknown, context: string): number {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n\n let x = Number(value);\n x = censorNegativeZero(x);\n\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n\n x = integerPart(x);\n\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n\n return x;\n}\n","import { IsReadableStream, ReadableStream } from '../readable-stream';\n\nexport function assertReadableStream(x: unknown, context: string): asserts x is ReadableStream {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, ReadableStream } from '../readable-stream';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { PullSteps } from '../abstract-ops/internal-methods';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\n\n/**\n * A result returned by {@link ReadableStreamDefaultReader.read}.\n *\n * @public\n */\nexport type ReadableStreamDefaultReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value?: undefined;\n}\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamDefaultReader(stream: ReadableStream): ReadableStreamDefaultReader {\n return new ReadableStreamDefaultReader(stream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadRequest(stream: ReadableStream,\n readRequest: ReadRequest): void {\n assert(IsReadableStreamDefaultReader(stream._reader));\n assert(stream._state === 'readable');\n\n (stream._reader! as ReadableStreamDefaultReader)._readRequests.push(readRequest);\n}\n\nexport function ReadableStreamFulfillReadRequest(stream: ReadableStream, chunk: R | undefined, done: boolean) {\n const reader = stream._reader as ReadableStreamDefaultReader;\n\n assert(reader._readRequests.length > 0);\n\n const readRequest = reader._readRequests.shift()!;\n if (done) {\n readRequest._closeSteps();\n } else {\n readRequest._chunkSteps(chunk!);\n }\n}\n\nexport function ReadableStreamGetNumReadRequests(stream: ReadableStream): number {\n return (stream._reader as ReadableStreamDefaultReader)._readRequests.length;\n}\n\nexport function ReadableStreamHasDefaultReader(stream: ReadableStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadRequest {\n _chunkSteps(chunk: R): void;\n\n _closeSteps(): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamDefaultReader {\n /** @internal */\n _ownerReadableStream!: ReadableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(): Promise> {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamDefaultReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamDefaultReader(x: any): x is ReadableStreamDefaultReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultReader;\n}\n\nexport function ReadableStreamDefaultReaderRead(reader: ReadableStreamDefaultReader,\n readRequest: ReadRequest): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n } else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n } else {\n assert(stream._state === 'readable');\n stream._readableStreamController[PullSteps](readRequest as ReadRequest);\n }\n}\n\nexport function ReadableStreamDefaultReaderRelease(reader: ReadableStreamDefaultReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n}\n\nexport function ReadableStreamDefaultReaderErrorReadRequests(reader: ReadableStreamDefaultReader, e: any) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamDefaultReader.\n\nfunction defaultReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n","import { reflectCall } from 'lib/helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport assert from '../../stub/assert';\n\ndeclare global {\n interface ArrayBuffer {\n readonly detached: boolean;\n\n transfer(): ArrayBuffer;\n }\n\n function structuredClone(value: T, options: { transfer: ArrayBuffer[] }): T;\n}\n\nexport function CreateArrayFromList(elements: T): T {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice() as T;\n}\n\nexport function CopyDataBlockBytes(dest: ArrayBuffer,\n destOffset: number,\n src: ArrayBuffer,\n srcOffset: number,\n n: number) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n\nexport let TransferArrayBuffer = (O: ArrayBuffer): ArrayBuffer => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n } else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n } else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n};\n\nexport function CanTransferArrayBuffer(O: ArrayBuffer): boolean {\n return !IsDetachedBuffer(O);\n}\n\nexport let IsDetachedBuffer = (O: ArrayBuffer): boolean => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n } else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n};\n\nexport function ArrayBufferSlice(buffer: ArrayBuffer, begin: number, end: number): ArrayBuffer {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n}\n\nexport type MethodName = {\n [P in keyof T]: T[P] extends Function | undefined ? P : never;\n}[keyof T];\n\nexport function GetMethod>(receiver: T, prop: K): T[K] | undefined {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n}\n\nexport interface SyncIteratorRecord {\n iterator: Iterator,\n nextMethod: Iterator['next'],\n done: boolean;\n}\n\nexport interface AsyncIteratorRecord {\n iterator: AsyncIterator,\n nextMethod: AsyncIterator['next'],\n done: boolean;\n}\n\nexport type SyncOrAsyncIteratorRecord = SyncIteratorRecord | AsyncIteratorRecord;\n\nexport function CreateAsyncFromSyncIterator(syncIteratorRecord: SyncIteratorRecord): AsyncIteratorRecord {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n}\n\n// Aligns with core-js/modules/es.symbol.async-iterator.js\nexport const SymbolAsyncIterator: (typeof Symbol)['asyncIterator'] =\n Symbol.asyncIterator ??\n Symbol.for?.('Symbol.asyncIterator') ??\n '@@asyncIterator';\n\nexport type SyncOrAsyncIterable = Iterable | AsyncIterable;\nexport type SyncOrAsyncIteratorMethod = () => (Iterator | AsyncIterator);\n\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint: 'async',\n method?: SyncOrAsyncIteratorMethod\n): AsyncIteratorRecord;\nfunction GetIterator(\n obj: Iterable,\n hint: 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncIteratorRecord;\nfunction GetIterator(\n obj: SyncOrAsyncIterable,\n hint = 'sync',\n method?: SyncOrAsyncIteratorMethod\n): SyncOrAsyncIteratorRecord {\n assert(hint === 'sync' || hint === 'async');\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj as AsyncIterable, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj as Iterable, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj as Iterable, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n } else {\n method = GetMethod(obj as Iterable, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false } as SyncOrAsyncIteratorRecord;\n}\n\nexport { GetIterator };\n\nexport function IteratorNext(iteratorRecord: AsyncIteratorRecord): Promise> {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n}\n\nexport function IteratorComplete(\n iterResult: IteratorResult\n): iterResult is IteratorReturnResult {\n assert(typeIsObject(iterResult));\n return Boolean(iterResult.done);\n}\n\nexport function IteratorValue(iterResult: IteratorYieldResult): T {\n assert(typeIsObject(iterResult));\n return iterResult.value;\n}\n","/// \n\nimport { SymbolAsyncIterator } from '../../../lib/abstract-ops/ecmascript';\n\n// We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it.\nexport const AsyncIteratorPrototype: AsyncIterable = {\n // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( )\n // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator\n [SymbolAsyncIterator](this: AsyncIterator) {\n return this;\n }\n};\nObject.defineProperty(AsyncIteratorPrototype, SymbolAsyncIterator, { enumerable: false });\n","/// \n\nimport { ReadableStream } from '../readable-stream';\nimport {\n AcquireReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadableStreamDefaultReadResult,\n type ReadRequest\n} from './default-reader';\nimport { ReadableStreamReaderGenericCancel, ReadableStreamReaderGenericRelease } from './generic-reader';\nimport assert from '../../stub/assert';\nimport { AsyncIteratorPrototype } from '@@target/stub/async-iterator-prototype';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n queueMicrotask,\n transformPromiseWith\n} from '../helpers/webidl';\n\n/**\n * An async iterator returned by {@link ReadableStream.values}.\n *\n * @public\n */\nexport interface ReadableStreamAsyncIterator extends AsyncIterableIterator {\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nexport class ReadableStreamAsyncIteratorImpl {\n private readonly _reader: ReadableStreamDefaultReader;\n private readonly _preventCancel: boolean;\n private _ongoingPromise: Promise> | undefined = undefined;\n private _isFinished = false;\n\n constructor(reader: ReadableStreamDefaultReader, preventCancel: boolean) {\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n\n next(): Promise> {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n\n return(value: any): Promise> {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n\n private _nextSteps(): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n\n let resolvePromise!: (result: ReadableStreamDefaultReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n\n private _returnSteps(value: any): Promise> {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n\n const reader = this._reader;\n assert(reader._ownerReadableStream !== undefined);\n assert(reader._readRequests.length === 0);\n\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n}\n\ninterface ReadableStreamAsyncIteratorInstance extends ReadableStreamAsyncIterator {\n /** @interal */\n _asyncIteratorImpl: ReadableStreamAsyncIteratorImpl;\n\n next(): Promise>;\n\n return(value?: any): Promise>;\n}\n\nconst ReadableStreamAsyncIteratorPrototype: ReadableStreamAsyncIteratorInstance = {\n next(this: ReadableStreamAsyncIteratorInstance): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n\n return(this: ReadableStreamAsyncIteratorInstance, value: any): Promise> {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n} as any;\nObject.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamAsyncIterator(stream: ReadableStream,\n preventCancel: boolean): ReadableStreamAsyncIterator {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator: ReadableStreamAsyncIteratorInstance = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n}\n\nfunction IsReadableStreamAsyncIterator(x: any): x is ReadableStreamAsyncIterator {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n\n try {\n // noinspection SuspiciousTypeOfGuard\n return (x as ReadableStreamAsyncIteratorInstance)._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n } catch {\n return false;\n }\n}\n\n// Helper functions for the ReadableStream.\n\nfunction streamAsyncIteratorBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n","/// \n\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN: typeof Number.isNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n};\n\nexport default NumberIsNaN;\n","import NumberIsNaN from '../../stub/number-isnan';\nimport { ArrayBufferSlice } from './ecmascript';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function IsNonNegativeNumber(v: number): boolean {\n if (typeof v !== 'number') {\n return false;\n }\n\n if (NumberIsNaN(v)) {\n return false;\n }\n\n if (v < 0) {\n return false;\n }\n\n return true;\n}\n\nexport function CloneAsUint8Array(O: NonShared): NonShared {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer) as NonShared;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsNonNegativeNumber } from './miscellaneous';\n\nexport interface QueueContainer {\n _queue: SimpleQueue;\n _queueTotalSize: number;\n}\n\nexport interface QueuePair {\n value: T;\n size: number;\n}\n\nexport function DequeueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.shift()!;\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n\n return pair.value;\n}\n\nexport function EnqueueValueWithSize(container: QueueContainer>, value: T, size: number) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n}\n\nexport function PeekQueueValue(container: QueueContainer>): T {\n assert('_queue' in container && '_queueTotalSize' in container);\n assert(container._queue.length > 0);\n\n const pair = container._queue.peek();\n return pair.value;\n}\n\nexport function ResetQueue(container: QueueContainer) {\n assert('_queue' in container && '_queueTotalSize' in container);\n\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n}\n","export type TypedArray =\n | Int8Array\n | Uint8Array\n | Uint8ClampedArray\n | Int16Array\n | Uint16Array\n | Int32Array\n | Uint32Array\n | Float32Array\n | Float64Array;\n\nexport type NonShared = T & {\n buffer: ArrayBuffer;\n}\n\nexport interface ArrayBufferViewConstructor {\n new(buffer: ArrayBuffer, byteOffset: number, length?: number): T;\n\n readonly prototype: T;\n}\n\nexport interface TypedArrayConstructor extends ArrayBufferViewConstructor {\n readonly BYTES_PER_ELEMENT: number;\n}\n\nexport type DataViewConstructor = ArrayBufferViewConstructor;\n\nfunction isDataViewConstructor(ctor: Function): ctor is DataViewConstructor {\n return ctor === DataView;\n}\n\nexport function isDataView(view: ArrayBufferView): view is DataView {\n return isDataViewConstructor(view.constructor);\n}\n\nexport function arrayBufferViewElementSize(ctor: ArrayBufferViewConstructor): number {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return (ctor as unknown as TypedArrayConstructor).BYTES_PER_ELEMENT;\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport { ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n IsReadableStreamDefaultReader,\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n ReadableStreamHasDefaultReader,\n type ReadRequest\n} from './default-reader';\nimport {\n ReadableStreamAddReadIntoRequest,\n ReadableStreamFulfillReadIntoRequest,\n ReadableStreamGetNumReadIntoRequests,\n ReadableStreamHasBYOBReader,\n type ReadIntoRequest\n} from './byob-reader';\nimport NumberIsInteger from '../../stub/number-isinteger';\nimport {\n IsReadableStreamLocked,\n type ReadableByteStream,\n ReadableStreamClose,\n ReadableStreamError\n} from '../readable-stream';\nimport type { ValidatedUnderlyingByteSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport {\n ArrayBufferSlice,\n CanTransferArrayBuffer,\n CopyDataBlockBytes,\n IsDetachedBuffer,\n TransferArrayBuffer\n} from '../abstract-ops/ecmascript';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\nimport { assertRequiredArgument, convertUnsignedLongLongWithEnforceRange } from '../validators/basic';\nimport {\n type ArrayBufferViewConstructor,\n arrayBufferViewElementSize,\n type NonShared,\n type TypedArrayConstructor\n} from '../helpers/array-buffer-view';\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nexport class ReadableStreamBYOBRequest {\n /** @internal */\n _associatedReadableByteStreamController!: ReadableByteStreamController;\n /** @internal */\n _view!: NonShared | null;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view(): ArrayBufferView | null {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n\n return this._view;\n }\n\n /**\n * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into\n * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer.\n *\n * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer\n * modifiable.\n */\n respond(bytesWritten: number): void;\n respond(bytesWritten: number | undefined): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(this._view!.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n\n assert(this._view!.byteLength > 0);\n assert(this._view!.buffer.byteLength > 0);\n\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n\n /**\n * Indicates to the associated readable byte stream that instead of writing into\n * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`,\n * which will be given to the consumer of the readable byte stream.\n *\n * After this method is called, `view` will be transferred and no longer modifiable.\n */\n respondWithNewView(view: ArrayBufferView): void;\n respondWithNewView(view: NonShared): void {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\nsetFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n}\n\ninterface ByteQueueElement {\n buffer: ArrayBuffer;\n byteOffset: number;\n byteLength: number;\n}\n\ntype PullIntoDescriptor = NonShared> =\n DefaultPullIntoDescriptor\n | BYOBPullIntoDescriptor;\n\ninterface DefaultPullIntoDescriptor {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: TypedArrayConstructor;\n readerType: 'default' | 'none';\n}\n\ninterface BYOBPullIntoDescriptor = NonShared> {\n buffer: ArrayBuffer;\n bufferByteLength: number;\n byteOffset: number;\n byteLength: number;\n bytesFilled: number;\n minimumFill: number;\n elementSize: number;\n viewConstructor: ArrayBufferViewConstructor;\n readerType: 'byob' | 'none';\n}\n\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableByteStreamController {\n /** @internal */\n _controlledReadableByteStream!: ReadableByteStream;\n /** @internal */\n _queue!: SimpleQueue;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n /** @internal */\n _autoAllocateChunkSize: number | undefined;\n /** @internal */\n _byobRequest: ReadableStreamBYOBRequest | null;\n /** @internal */\n _pendingPullIntos!: SimpleQueue;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest(): ReadableStreamBYOBRequest | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n\n ReadableByteStreamControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk chunk in the controlled readable stream.\n * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown.\n */\n enqueue(chunk: ArrayBufferView): void;\n enqueue(chunk: NonShared): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n\n ReadableByteStreamControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n\n ResetQueue(this);\n\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest>): void {\n const stream = this._controlledReadableByteStream;\n assert(ReadableStreamHasDefaultReader(stream));\n\n if (this._queueTotalSize > 0) {\n assert(ReadableStreamGetNumReadRequests(stream) === 0);\n\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer: ArrayBuffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n } catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n\n const pullIntoDescriptor: DefaultPullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n}\n\nObject.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableByteStreamController.prototype.close, 'close');\nsetFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableByteStreamController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableByteStreamController.\n\nexport function IsReadableByteStreamController(x: any): x is ReadableByteStreamController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n\n return x instanceof ReadableByteStreamController;\n}\n\nfunction IsReadableStreamBYOBRequest(x: any): x is ReadableStreamBYOBRequest {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBRequest;\n}\n\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller: ReadableByteStreamController): void {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller: ReadableByteStreamController) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n}\n\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor>(\n stream: ReadableByteStream,\n pullIntoDescriptor: PullIntoDescriptor\n) {\n assert(stream._state !== 'errored');\n assert(pullIntoDescriptor.readerType !== 'none');\n\n let done = false;\n if (stream._state === 'closed') {\n assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);\n done = true;\n }\n\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView as unknown as NonShared, done);\n } else {\n assert(pullIntoDescriptor.readerType === 'byob');\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n}\n\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor>(\n pullIntoDescriptor: PullIntoDescriptor\n): T {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n\n assert(bytesFilled <= pullIntoDescriptor.byteLength);\n assert(bytesFilled % elementSize === 0);\n\n return new pullIntoDescriptor.viewConstructor(\n pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize) as T;\n}\n\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n}\n\nfunction ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller: ReadableByteStreamController,\n buffer: ArrayBuffer,\n byteOffset: number,\n byteLength: number) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n } catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n}\n\nfunction ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.readerType === 'none');\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n firstDescriptor.buffer,\n firstDescriptor.byteOffset,\n firstDescriptor.bytesFilled\n );\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n}\n\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller: ReadableByteStreamController,\n pullIntoDescriptor: PullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize,\n pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n\n const queue = controller._queue;\n\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n } else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n\n if (!ready) {\n assert(controller._queueTotalSize === 0);\n assert(pullIntoDescriptor.bytesFilled > 0);\n assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill);\n }\n\n return ready;\n}\n\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller: ReadableByteStreamController,\n size: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);\n assert(controller._byobRequest === null);\n pullIntoDescriptor.bytesFilled += size;\n}\n\nfunction ReadableByteStreamControllerHandleQueueDrain(controller: ReadableByteStreamController) {\n assert(controller._controlledReadableByteStream._state === 'readable');\n\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n } else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n}\n\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller: ReadableByteStreamController) {\n if (controller._byobRequest === null) {\n return;\n }\n\n controller._byobRequest._associatedReadableByteStreamController = undefined!;\n controller._byobRequest._view = null!;\n controller._byobRequest = null;\n}\n\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller: ReadableByteStreamController) {\n assert(!controller._closeRequested);\n\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n assert(pullIntoDescriptor.readerType !== 'none');\n\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n ReadableByteStreamControllerCommitPullIntoDescriptor(\n controller._controlledReadableByteStream,\n pullIntoDescriptor\n );\n }\n }\n}\n\nfunction ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller: ReadableByteStreamController) {\n const reader = controller._controlledReadableByteStream._reader;\n assert(IsReadableStreamDefaultReader(reader));\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n}\n\nexport function ReadableByteStreamControllerPullInto>(\n controller: ReadableByteStreamController,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = controller._controlledReadableByteStream;\n\n const ctor = view.constructor as ArrayBufferViewConstructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n\n const { byteOffset, byteLength } = view;\n\n const minimumFill = min * elementSize;\n assert(minimumFill >= elementSize && minimumFill <= byteLength);\n assert(minimumFill % elementSize === 0);\n\n let buffer: ArrayBuffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n } catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n\n const pullIntoDescriptor: BYOBPullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n\n controller._pendingPullIntos.push(pullIntoDescriptor);\n\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInClosedState(controller: ReadableByteStreamController,\n firstDescriptor: PullIntoDescriptor) {\n assert(firstDescriptor.bytesFilled % firstDescriptor.elementSize === 0);\n\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n}\n\nfunction ReadableByteStreamControllerRespondInReadableState(controller: ReadableByteStreamController,\n bytesWritten: number,\n pullIntoDescriptor: PullIntoDescriptor) {\n assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);\n\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(\n controller,\n pullIntoDescriptor.buffer,\n end - remainderSize,\n remainderSize\n );\n }\n\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\n\nfunction ReadableByteStreamControllerRespondInternal(controller: ReadableByteStreamController, bytesWritten: number) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n assert(CanTransferArrayBuffer(firstDescriptor.buffer));\n\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n assert(bytesWritten === 0);\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n } else {\n assert(state === 'readable');\n assert(bytesWritten > 0);\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nfunction ReadableByteStreamControllerShiftPendingPullInto(\n controller: ReadableByteStreamController\n): PullIntoDescriptor {\n assert(controller._byobRequest === null);\n const descriptor = controller._pendingPullIntos.shift()!;\n return descriptor;\n}\n\nfunction ReadableByteStreamControllerShouldCallPull(controller: ReadableByteStreamController): boolean {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return false;\n }\n\n if (controller._closeRequested) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableByteStreamControllerClearAlgorithms(controller: ReadableByteStreamController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\n\nexport function ReadableByteStreamControllerClose(controller: ReadableByteStreamController) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n\n return;\n }\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n\n throw e;\n }\n }\n\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n}\n\nexport function ReadableByteStreamControllerEnqueue(\n controller: ReadableByteStreamController,\n chunk: NonShared\n) {\n const stream = controller._controlledReadableByteStream;\n\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError(\n 'The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk'\n );\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n assert(controller._pendingPullIntos.length === 0);\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n } else {\n assert(controller._queue.length === 0);\n if (controller._pendingPullIntos.length > 0) {\n assert(controller._pendingPullIntos.peek().readerType === 'default');\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView as NonShared, false);\n }\n } else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n } else {\n assert(!IsReadableStreamLocked(stream));\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableByteStreamControllerError(controller: ReadableByteStreamController, e: any) {\n const stream = controller._controlledReadableByteStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableByteStreamControllerFillReadRequestFromQueue(\n controller: ReadableByteStreamController,\n readRequest: ReadRequest>\n) {\n assert(controller._queueTotalSize > 0);\n\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n\n ReadableByteStreamControllerHandleQueueDrain(controller);\n\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view as NonShared);\n}\n\nexport function ReadableByteStreamControllerGetBYOBRequest(\n controller: ReadableByteStreamController\n): ReadableStreamBYOBRequest | null {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer,\n firstDescriptor.byteOffset + firstDescriptor.bytesFilled,\n firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n\n const byobRequest: ReadableStreamBYOBRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view as NonShared);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n}\n\nfunction ReadableByteStreamControllerGetDesiredSize(controller: ReadableByteStreamController): number | null {\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nexport function ReadableByteStreamControllerRespond(controller: ReadableByteStreamController, bytesWritten: number) {\n assert(controller._pendingPullIntos.length > 0);\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n}\n\nexport function ReadableByteStreamControllerRespondWithNewView(controller: ReadableByteStreamController,\n view: NonShared) {\n assert(controller._pendingPullIntos.length > 0);\n assert(!IsDetachedBuffer(view.buffer));\n\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n } else {\n assert(state === 'readable');\n if (view.byteLength === 0) {\n throw new TypeError(\n 'The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream'\n );\n }\n }\n\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n}\n\nexport function SetUpReadableByteStreamController(stream: ReadableByteStream,\n controller: ReadableByteStreamController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n autoAllocateChunkSize: number | undefined) {\n assert(stream._readableStreamController === undefined);\n if (autoAllocateChunkSize !== undefined) {\n assert(NumberIsInteger(autoAllocateChunkSize));\n assert(autoAllocateChunkSize > 0);\n }\n\n controller._controlledReadableByteStream = stream;\n\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._byobRequest = null;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._closeRequested = false;\n controller._started = false;\n\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n\n controller._pendingPullIntos = new SimpleQueue();\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableByteStreamControllerFromUnderlyingSource(\n stream: ReadableByteStream,\n underlyingByteSource: ValidatedUnderlyingByteSource,\n highWaterMark: number\n) {\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n\n SetUpReadableByteStreamController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize\n );\n}\n\nfunction SetUpReadableStreamBYOBRequest(request: ReadableStreamBYOBRequest,\n controller: ReadableByteStreamController,\n view: NonShared) {\n assert(IsReadableByteStreamController(controller));\n assert(typeof view === 'object');\n assert(ArrayBuffer.isView(view));\n assert(!IsDetachedBuffer(view.buffer));\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n}\n\n// Helper functions for the ReadableStreamBYOBRequest.\n\nfunction byobRequestBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n}\n\n// Helper functions for the ReadableByteStreamController.\n\nfunction byteStreamControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n}\n","import { assertDictionary, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from '../readable-stream/reader-options';\n\nexport function convertReaderOptions(options: ReadableStreamGetReaderOptions | null | undefined,\n context: string): ReadableStreamGetReaderOptions {\n assertDictionary(options, context);\n const mode = options?.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n}\n\nfunction convertReadableStreamReaderMode(mode: string, context: string): 'byob' {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n}\n\nexport function convertByobReadOptions(\n options: ReadableStreamBYOBReaderReadOptions | null | undefined,\n context: string\n): ValidatedReadableStreamBYOBReaderReadOptions {\n assertDictionary(options, context);\n const min = options?.min ?? 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(\n min,\n `${context} has member 'min' that`\n )\n };\n}\n","import assert from '../../stub/assert';\nimport { SimpleQueue } from '../simple-queue';\nimport {\n ReadableStreamReaderGenericCancel,\n ReadableStreamReaderGenericInitialize,\n ReadableStreamReaderGenericRelease,\n readerLockException\n} from './generic-reader';\nimport { IsReadableStreamLocked, type ReadableByteStream, type ReadableStream } from '../readable-stream';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamController,\n ReadableByteStreamControllerPullInto\n} from './byte-stream-controller';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { newPromise, promiseRejectedWith } from '../helpers/webidl';\nimport { assertRequiredArgument } from '../validators/basic';\nimport { assertReadableStream } from '../validators/readable-stream';\nimport { IsDetachedBuffer } from '../abstract-ops/ecmascript';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ValidatedReadableStreamBYOBReaderReadOptions\n} from './reader-options';\nimport { convertByobReadOptions } from '../validators/reader-options';\nimport { isDataView, type NonShared, type TypedArray } from '../helpers/array-buffer-view';\n\n/**\n * A result returned by {@link ReadableStreamBYOBReader.read}.\n *\n * @public\n */\nexport type ReadableStreamBYOBReadResult = {\n done: false;\n value: T;\n} | {\n done: true;\n value: T | undefined;\n};\n\n// Abstract operations for the ReadableStream.\n\nexport function AcquireReadableStreamBYOBReader(stream: ReadableByteStream): ReadableStreamBYOBReader {\n return new ReadableStreamBYOBReader(stream as ReadableStream);\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamAddReadIntoRequest>(\n stream: ReadableByteStream,\n readIntoRequest: ReadIntoRequest\n): void {\n assert(IsReadableStreamBYOBReader(stream._reader));\n assert(stream._state === 'readable' || stream._state === 'closed');\n\n (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);\n}\n\nexport function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,\n chunk: ArrayBufferView,\n done: boolean) {\n const reader = stream._reader as ReadableStreamBYOBReader;\n\n assert(reader._readIntoRequests.length > 0);\n\n const readIntoRequest = reader._readIntoRequests.shift()!;\n if (done) {\n readIntoRequest._closeSteps(chunk);\n } else {\n readIntoRequest._chunkSteps(chunk);\n }\n}\n\nexport function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {\n return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;\n}\n\nexport function ReadableStreamHasBYOBReader(stream: ReadableByteStream): boolean {\n const reader = stream._reader;\n\n if (reader === undefined) {\n return false;\n }\n\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n\n return true;\n}\n\n// Readers\n\nexport interface ReadIntoRequest> {\n _chunkSteps(chunk: T): void;\n\n _closeSteps(chunk: T | undefined): void;\n\n _errorSteps(e: any): void;\n}\n\n/**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nexport class ReadableStreamBYOBReader {\n /** @internal */\n _ownerReadableStream!: ReadableByteStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _readIntoRequests: SimpleQueue>;\n\n constructor(stream: ReadableStream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n\n ReadableStreamReaderGenericInitialize(this, stream);\n\n this._readIntoRequests = new SimpleQueue();\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n\n /**\n * Attempts to reads bytes into view, and returns a promise resolved with the result.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read(\n view: T,\n options?: ReadableStreamBYOBReaderReadOptions\n ): Promise>;\n read>(\n view: T,\n rawOptions: ReadableStreamBYOBReaderReadOptions | null | undefined = {}\n ): Promise> {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n\n let options: ValidatedReadableStreamBYOBReaderReadOptions;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > (view as unknown as TypedArray).length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n } else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n\n let resolvePromise!: (result: ReadableStreamBYOBReadResult) => void;\n let rejectPromise!: (reason: any) => void;\n const promise = newPromise>((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest: ReadIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock(): void {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n\n if (this._ownerReadableStream === undefined) {\n return;\n }\n\n ReadableStreamBYOBReaderRelease(this);\n }\n}\n\nObject.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n});\nsetFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\nsetFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n}\n\n// Abstract operations for the readers.\n\nexport function IsReadableStreamBYOBReader(x: any): x is ReadableStreamBYOBReader {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n\n return x instanceof ReadableStreamBYOBReader;\n}\n\nexport function ReadableStreamBYOBReaderRead>(\n reader: ReadableStreamBYOBReader,\n view: T,\n min: number,\n readIntoRequest: ReadIntoRequest\n): void {\n const stream = reader._ownerReadableStream;\n\n assert(stream !== undefined);\n\n stream._disturbed = true;\n\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n } else {\n ReadableByteStreamControllerPullInto(\n stream._readableStreamController as ReadableByteStreamController,\n view,\n min,\n readIntoRequest\n );\n }\n}\n\nexport function ReadableStreamBYOBReaderRelease(reader: ReadableStreamBYOBReader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n}\n\nexport function ReadableStreamBYOBReaderErrorReadIntoRequests(reader: ReadableStreamBYOBReader, e: any) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n}\n\n// Helper functions for the ReadableStreamBYOBReader.\n\nfunction byobReaderBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport NumberIsNaN from '../../stub/number-isnan';\n\nexport function ExtractHighWaterMark(strategy: QueuingStrategy, defaultHWM: number): number {\n const { highWaterMark } = strategy;\n\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n\n return highWaterMark;\n}\n\nexport function ExtractSizeAlgorithm(strategy: QueuingStrategy): QueuingStrategySizeCallback {\n const { size } = strategy;\n\n if (!size) {\n return () => 1;\n }\n\n return size;\n}\n","import type { QueuingStrategy, QueuingStrategySizeCallback } from '../queuing-strategy';\nimport { assertDictionary, assertFunction, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategy(init: QueuingStrategy | null | undefined,\n context: string): QueuingStrategy {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n const size = init?.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n}\n\nfunction convertQueuingStrategySize(fn: QueuingStrategySizeCallback,\n context: string): QueuingStrategySizeCallback {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from '../writable-stream/underlying-sink';\nimport { WritableStreamDefaultController } from '../writable-stream';\n\nexport function convertUnderlyingSink(original: UnderlyingSink | null,\n context: string): ValidatedUnderlyingSink {\n assertDictionary(original, context);\n const abort = original?.abort;\n const close = original?.close;\n const start = original?.start;\n const type = original?.type;\n const write = original?.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original!, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original!, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original!, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original!, `${context} has member 'write' that`),\n type\n };\n}\n\nfunction convertUnderlyingSinkAbortCallback(\n fn: UnderlyingSinkAbortCallback,\n original: UnderlyingSink,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSinkCloseCallback(\n fn: UnderlyingSinkCloseCallback,\n original: UnderlyingSink,\n context: string\n): () => Promise {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n}\n\nfunction convertUnderlyingSinkStartCallback(\n fn: UnderlyingSinkStartCallback,\n original: UnderlyingSink,\n context: string\n): UnderlyingSinkStartCallback {\n assertFunction(fn, context);\n return (controller: WritableStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSinkWriteCallback(\n fn: UnderlyingSinkWriteCallback,\n original: UnderlyingSink,\n context: string\n): (chunk: W, controller: WritableStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: W, controller: WritableStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n","import { IsWritableStream, WritableStream } from '../writable-stream';\n\nexport function assertWritableStream(x: unknown, context: string): asserts x is WritableStream {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n}\n","/**\n * A signal object that allows you to communicate with a request and abort it if required\n * via its associated `AbortController` object.\n *\n * @remarks\n * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @public\n */\nexport interface AbortSignal {\n /**\n * Whether the request is aborted.\n */\n readonly aborted: boolean;\n\n /**\n * If aborted, returns the reason for aborting.\n */\n readonly reason?: any;\n\n /**\n * Add an event listener to be triggered when this signal becomes aborted.\n */\n addEventListener(type: 'abort', listener: () => void): void;\n\n /**\n * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}.\n */\n removeEventListener(type: 'abort', listener: () => void): void;\n}\n\nexport function isAbortSignal(value: unknown): value is AbortSignal {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof (value as AbortSignal).aborted === 'boolean';\n } catch {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n}\n\n/**\n * A controller object that allows you to abort an `AbortSignal` when desired.\n *\n * @remarks\n * This interface is compatible with the `AbortController` interface defined in TypeScript's DOM types.\n * It is redefined here, so it can be polyfilled without a DOM, for example with\n * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment.\n *\n * @internal\n */\nexport interface AbortController {\n readonly signal: AbortSignal;\n\n abort(reason?: any): void;\n}\n\ninterface AbortControllerConstructor {\n new(): AbortController;\n}\n\nconst supportsAbortController = typeof (AbortController as any) === 'function';\n\n/**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\nexport function createAbortController(): AbortController | undefined {\n if (supportsAbortController) {\n return new (AbortController as AbortControllerConstructor)();\n }\n return undefined;\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponPromise\n} from './helpers/webidl';\nimport {\n DequeueValue,\n EnqueueValueWithSize,\n PeekQueueValue,\n type QueuePair,\n ResetQueue\n} from './abstract-ops/queue-with-sizes';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { SimpleQueue } from './simple-queue';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { AbortSteps, ErrorSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport type {\n UnderlyingSink,\n UnderlyingSinkAbortCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n ValidatedUnderlyingSink\n} from './writable-stream/underlying-sink';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertUnderlyingSink } from './validators/underlying-sink';\nimport { assertWritableStream } from './validators/writable-stream';\nimport { type AbortController, type AbortSignal, createAbortController } from './abort-signal';\n\ntype WritableStreamState = 'writable' | 'closed' | 'erroring' | 'errored';\n\ninterface WriteOrCloseRequest {\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n}\n\ntype WriteRequest = WriteOrCloseRequest;\ntype CloseRequest = WriteOrCloseRequest;\n\ninterface PendingAbortRequest {\n _promise: Promise;\n _resolve: (value?: undefined) => void;\n _reject: (reason: any) => void;\n _reason: any;\n _wasAlreadyErroring: boolean;\n}\n\n/**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\nclass WritableStream {\n /** @internal */\n _state!: WritableStreamState;\n /** @internal */\n _storedError: any;\n /** @internal */\n _writer: WritableStreamDefaultWriter | undefined;\n /** @internal */\n _writableStreamController!: WritableStreamDefaultController;\n /** @internal */\n _writeRequests!: SimpleQueue;\n /** @internal */\n _inFlightWriteRequest: WriteRequest | undefined;\n /** @internal */\n _closeRequest: CloseRequest | undefined;\n /** @internal */\n _inFlightCloseRequest: CloseRequest | undefined;\n /** @internal */\n _pendingAbortRequest: PendingAbortRequest | undefined;\n /** @internal */\n _backpressure!: boolean;\n\n constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSink: UnderlyingSink | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n } else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n\n InitializeWritableStream(this);\n\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked(): boolean {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsWritableStreamLocked(this);\n }\n\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('abort'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n\n return WritableStreamAbort(this, reason);\n }\n\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('close'));\n }\n\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamClose(this);\n }\n\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter(): WritableStreamDefaultWriter {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException('getWriter');\n }\n\n return AcquireWritableStreamDefaultWriter(this);\n }\n}\n\nObject.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(WritableStream.prototype.abort, 'abort');\nsetFunctionName(WritableStream.prototype.close, 'close');\nsetFunctionName(WritableStream.prototype.getWriter, 'getWriter');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n}\n\nexport {\n AcquireWritableStreamDefaultWriter,\n CreateWritableStream,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamDefaultControllerErrorIfNeeded,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite,\n WritableStreamCloseQueuedOrInFlight\n};\n\nexport type {\n UnderlyingSink,\n UnderlyingSinkStartCallback,\n UnderlyingSinkWriteCallback,\n UnderlyingSinkCloseCallback,\n UnderlyingSinkAbortCallback\n};\n\n// Abstract operations for the WritableStream.\n\nfunction AcquireWritableStreamDefaultWriter(stream: WritableStream): WritableStreamDefaultWriter {\n return new WritableStreamDefaultWriter(stream);\n}\n\n// Throws if and only if startAlgorithm throws.\nfunction CreateWritableStream(startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: WritableStream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n\n const controller: WritableStreamDefaultController = Object.create(WritableStreamDefaultController.prototype);\n\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm,\n abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n}\n\nfunction InitializeWritableStream(stream: WritableStream) {\n stream._state = 'writable';\n\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n\n stream._writer = undefined;\n\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined!;\n\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n}\n\nfunction IsWritableStream(x: unknown): x is WritableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n\n return x instanceof WritableStream;\n}\n\nfunction IsWritableStreamLocked(stream: WritableStream): boolean {\n assert(IsWritableStream(stream));\n\n if (stream._writer === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamAbort(stream: WritableStream, reason: any): Promise {\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n stream._writableStreamController._abortController?.abort(reason);\n\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state as WritableStreamState;\n\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined!,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest!._promise = promise;\n\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n\n return promise;\n}\n\nfunction WritableStreamClose(stream: WritableStream): Promise {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(\n `The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n\n assert(state === 'writable' || state === 'erroring');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const promise = newPromise((resolve, reject) => {\n const closeRequest: CloseRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._closeRequest = closeRequest;\n });\n\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n\n return promise;\n}\n\n// WritableStream API exposed for controllers.\n\nfunction WritableStreamAddWriteRequest(stream: WritableStream): Promise {\n assert(IsWritableStreamLocked(stream));\n assert(stream._state === 'writable');\n\n const promise = newPromise((resolve, reject) => {\n const writeRequest: WriteRequest = {\n _resolve: resolve,\n _reject: reject\n };\n\n stream._writeRequests.push(writeRequest);\n });\n\n return promise;\n}\n\nfunction WritableStreamDealWithRejection(stream: WritableStream, error: any) {\n const state = stream._state;\n\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n\n assert(state === 'erroring');\n WritableStreamFinishErroring(stream);\n}\n\nfunction WritableStreamStartErroring(stream: WritableStream, reason: any) {\n assert(stream._storedError === undefined);\n assert(stream._state === 'writable');\n\n const controller = stream._writableStreamController;\n assert(controller !== undefined);\n\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n}\n\nfunction WritableStreamFinishErroring(stream: WritableStream) {\n assert(stream._state === 'erroring');\n assert(!WritableStreamHasOperationMarkedInFlight(stream));\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(\n promise,\n () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n },\n (reason: any) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n}\n\nfunction WritableStreamFinishInFlightWrite(stream: WritableStream) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n}\n\nfunction WritableStreamFinishInFlightWriteWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightWriteRequest !== undefined);\n stream._inFlightWriteRequest!._reject(error);\n stream._inFlightWriteRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n WritableStreamDealWithRejection(stream, error);\n}\n\nfunction WritableStreamFinishInFlightClose(stream: WritableStream) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n\n const state = stream._state;\n\n assert(state === 'writable' || state === 'erroring');\n\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n\n stream._state = 'closed';\n\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n\n assert(stream._pendingAbortRequest === undefined);\n assert(stream._storedError === undefined);\n}\n\nfunction WritableStreamFinishInFlightCloseWithError(stream: WritableStream, error: any) {\n assert(stream._inFlightCloseRequest !== undefined);\n stream._inFlightCloseRequest!._reject(error);\n stream._inFlightCloseRequest = undefined;\n\n assert(stream._state === 'writable' || stream._state === 'erroring');\n\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n}\n\n// TODO(ricea): Fix alphabetical order.\nfunction WritableStreamCloseQueuedOrInFlight(stream: WritableStream): boolean {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamHasOperationMarkedInFlight(stream: WritableStream): boolean {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n\n return true;\n}\n\nfunction WritableStreamMarkCloseRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightCloseRequest === undefined);\n assert(stream._closeRequest !== undefined);\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n}\n\nfunction WritableStreamMarkFirstWriteRequestInFlight(stream: WritableStream) {\n assert(stream._inFlightWriteRequest === undefined);\n assert(stream._writeRequests.length !== 0);\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n}\n\nfunction WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream: WritableStream) {\n assert(stream._state === 'errored');\n if (stream._closeRequest !== undefined) {\n assert(stream._inFlightCloseRequest === undefined);\n\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n}\n\nfunction WritableStreamUpdateBackpressure(stream: WritableStream, backpressure: boolean) {\n assert(stream._state === 'writable');\n assert(!WritableStreamCloseQueuedOrInFlight(stream));\n\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n } else {\n assert(!backpressure);\n\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n\n stream._backpressure = backpressure;\n}\n\n/**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\nexport class WritableStreamDefaultWriter {\n /** @internal */\n _ownerWritableStream: WritableStream;\n /** @internal */\n _closedPromise!: Promise;\n /** @internal */\n _closedPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _closedPromise_reject?: (reason: any) => void;\n /** @internal */\n _closedPromiseState!: 'pending' | 'resolved' | 'rejected';\n /** @internal */\n _readyPromise!: Promise;\n /** @internal */\n _readyPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _readyPromise_reject?: (reason: any) => void;\n /** @internal */\n _readyPromiseState!: 'pending' | 'fulfilled' | 'rejected';\n\n constructor(stream: WritableStream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n\n this._ownerWritableStream = stream;\n stream._writer = this;\n\n const state = stream._state;\n\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n } else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n } else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n } else {\n assert(state === 'errored');\n\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n\n return this._closedPromise;\n }\n\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize(): number | null {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n\n return this._readyPromise;\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason: any = undefined): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close(): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n\n return WritableStreamDefaultWriterClose(this);\n }\n\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock(): void {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n\n const stream = this._ownerWritableStream;\n\n if (stream === undefined) {\n return;\n }\n\n assert(stream._writer !== undefined);\n\n WritableStreamDefaultWriterRelease(this);\n }\n\n /**\n * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully,\n * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return\n * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes\n * errored before the writing process is initiated.\n *\n * Note that what \"success\" means is up to the underlying sink; it might indicate simply that the chunk has been\n * accepted, and not necessarily that it is safely saved to its ultimate destination.\n */\n write(chunk: W): Promise;\n write(chunk: W = undefined!): Promise {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n});\nsetFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\nsetFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\nsetFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\nsetFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n}\n\n// Abstract operations for the WritableStreamDefaultWriter.\n\nfunction IsWritableStreamDefaultWriter(x: any): x is WritableStreamDefaultWriter {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultWriter;\n}\n\n// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultWriterAbort(writer: WritableStreamDefaultWriter, reason: any) {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamAbort(stream, reason);\n}\n\nfunction WritableStreamDefaultWriterClose(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n return WritableStreamClose(stream);\n}\n\nfunction WritableStreamDefaultWriterCloseWithErrorPropagation(writer: WritableStreamDefaultWriter): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable' || state === 'erroring');\n\n return WritableStreamDefaultWriterClose(writer);\n}\n\nfunction WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n } else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer: WritableStreamDefaultWriter, error: any) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n } else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n}\n\nfunction WritableStreamDefaultWriterGetDesiredSize(writer: WritableStreamDefaultWriter): number | null {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n\n if (state === 'closed') {\n return 0;\n }\n\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n}\n\nfunction WritableStreamDefaultWriterRelease(writer: WritableStreamDefaultWriter) {\n const stream = writer._ownerWritableStream;\n assert(stream !== undefined);\n assert(stream._writer === writer);\n\n const releasedError = new TypeError(\n `Writer was released and can no longer be used to monitor the stream's closedness`);\n\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n\n stream._writer = undefined;\n writer._ownerWritableStream = undefined!;\n}\n\nfunction WritableStreamDefaultWriterWrite(writer: WritableStreamDefaultWriter, chunk: W): Promise {\n const stream = writer._ownerWritableStream;\n\n assert(stream !== undefined);\n\n const controller = stream._writableStreamController;\n\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n\n assert(state === 'writable');\n\n const promise = WritableStreamAddWriteRequest(stream);\n\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n\n return promise;\n}\n\nconst closeSentinel: unique symbol = {} as any;\n\ntype QueueRecord = W | typeof closeSentinel;\n\n/**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\nexport class WritableStreamDefaultController {\n /** @internal */\n _controlledWritableStream!: WritableStream;\n /** @internal */\n _queue!: SimpleQueue>>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _abortReason: any;\n /** @internal */\n _abortController: AbortController | undefined;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _writeAlgorithm!: (chunk: W) => Promise;\n /** @internal */\n _closeAlgorithm!: () => Promise;\n /** @internal */\n _abortAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason(): any {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('abortReason');\n }\n return this._abortReason;\n }\n\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal(): AbortSignal {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e: any = undefined): void {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n\n WritableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [AbortSteps](reason: any): Promise {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n}\n\nObject.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations implementing interface required by the WritableStream.\n\nfunction IsWritableStreamDefaultController(x: any): x is WritableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n\n return x instanceof WritableStreamDefaultController;\n}\n\nfunction SetUpWritableStreamDefaultController(stream: WritableStream,\n controller: WritableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n writeAlgorithm: (chunk: W) => Promise,\n closeAlgorithm: () => Promise,\n abortAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(IsWritableStream(stream));\n assert(stream._writableStreamController === undefined);\n\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(\n startPromise,\n () => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n r => {\n assert(stream._state === 'writable' || stream._state === 'erroring');\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n }\n );\n}\n\nfunction SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream: WritableStream,\n underlyingSink: ValidatedUnderlyingSink,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let writeAlgorithm: (chunk: W) => Promise;\n let closeAlgorithm: () => Promise;\n let abortAlgorithm: (reason: any) => Promise;\n\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write!(chunk, controller);\n } else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close!();\n } else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort!(reason);\n } else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpWritableStreamDefaultController(\n stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\nfunction WritableStreamDefaultControllerClearAlgorithms(controller: WritableStreamDefaultController) {\n controller._writeAlgorithm = undefined!;\n controller._closeAlgorithm = undefined!;\n controller._abortAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\nfunction WritableStreamDefaultControllerClose(controller: WritableStreamDefaultController) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\nfunction WritableStreamDefaultControllerGetChunkSize(controller: WritableStreamDefaultController,\n chunk: W): number {\n try {\n return controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n}\n\nfunction WritableStreamDefaultControllerGetDesiredSize(controller: WritableStreamDefaultController): number {\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\nfunction WritableStreamDefaultControllerWrite(controller: WritableStreamDefaultController,\n chunk: W,\n chunkSize: number) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n}\n\n// Abstract operations for the WritableStreamDefaultController.\n\nfunction WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n if (!controller._started) {\n return;\n }\n\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n\n const state = stream._state;\n assert(state !== 'closed' && state !== 'errored');\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n\n if (controller._queue.length === 0) {\n return;\n }\n\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n } else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n}\n\nfunction WritableStreamDefaultControllerErrorIfNeeded(controller: WritableStreamDefaultController, error: any) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n}\n\nfunction WritableStreamDefaultControllerProcessClose(controller: WritableStreamDefaultController) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkCloseRequestInFlight(stream);\n\n DequeueValue(controller);\n assert(controller._queue.length === 0);\n\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(\n sinkClosePromise,\n () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n },\n reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerProcessWrite(controller: WritableStreamDefaultController, chunk: W) {\n const stream = controller._controlledWritableStream;\n\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(\n sinkWritePromise,\n () => {\n WritableStreamFinishInFlightWrite(stream);\n\n const state = stream._state;\n assert(state === 'writable' || state === 'erroring');\n\n DequeueValue(controller);\n\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n },\n reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n }\n );\n}\n\nfunction WritableStreamDefaultControllerGetBackpressure(controller: WritableStreamDefaultController): boolean {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n}\n\n// A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n\nfunction WritableStreamDefaultControllerError(controller: WritableStreamDefaultController, error: any) {\n const stream = controller._controlledWritableStream;\n\n assert(stream._state === 'writable');\n\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n}\n\n// Helper functions for the WritableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n}\n\n// Helper functions for the WritableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n}\n\n\n// Helper functions for the WritableStreamDefaultWriter.\n\nfunction defaultWriterBrandCheckException(name: string): TypeError {\n return new TypeError(\n `WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n}\n\nfunction defaultWriterLockException(name: string): TypeError {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n}\n\nfunction defaultWriterClosedPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n}\n\nfunction defaultWriterClosedPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n}\n\nfunction defaultWriterClosedPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n}\n\nfunction defaultWriterClosedPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._closedPromise_resolve === undefined);\n assert(writer._closedPromise_reject === undefined);\n assert(writer._closedPromiseState !== 'pending');\n\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterClosedPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n assert(writer._closedPromiseState === 'pending');\n\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n}\n\nfunction defaultWriterReadyPromiseInitialize(writer: WritableStreamDefaultWriter) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n}\n\nfunction defaultWriterReadyPromiseInitializeAsRejected(writer: WritableStreamDefaultWriter, reason: any) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseInitializeAsResolved(writer: WritableStreamDefaultWriter) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n}\n\nfunction defaultWriterReadyPromiseReject(writer: WritableStreamDefaultWriter, reason: any) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n}\n\nfunction defaultWriterReadyPromiseReset(writer: WritableStreamDefaultWriter) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitialize(writer);\n}\n\nfunction defaultWriterReadyPromiseResetToRejected(writer: WritableStreamDefaultWriter, reason: any) {\n assert(writer._readyPromise_resolve === undefined);\n assert(writer._readyPromise_reject === undefined);\n\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n}\n\nfunction defaultWriterReadyPromiseResolve(writer: WritableStreamDefaultWriter) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n}\n","/// \n\nfunction getGlobals(): typeof globalThis | undefined {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n } else if (typeof self !== 'undefined') {\n return self;\n } else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n}\n\nexport const globals = getGlobals();\n","/// \nimport { globals } from '../globals';\nimport { setFunctionName } from '../lib/helpers/miscellaneous';\n\ninterface DOMException extends Error {\n name: string;\n message: string;\n}\n\ntype DOMExceptionConstructor = new (message?: string, name?: string) => DOMException;\n\nfunction isDOMExceptionConstructor(ctor: unknown): ctor is DOMExceptionConstructor {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if ((ctor as DOMExceptionConstructor).name !== 'DOMException') {\n return false;\n }\n try {\n new (ctor as DOMExceptionConstructor)();\n return true;\n } catch {\n return false;\n }\n}\n\n/**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\nfunction getFromGlobal(): DOMExceptionConstructor | undefined {\n const ctor = globals?.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n}\n\n/**\n * Support:\n * - All platforms\n */\nfunction createPolyfill(): DOMExceptionConstructor {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(this: DOMException, message?: string, name?: string) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n } as any;\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n}\n\n// eslint-disable-next-line @typescript-eslint/no-redeclare\nconst DOMException: DOMExceptionConstructor = getFromGlobal() || createPolyfill();\n\nexport { DOMException };\n","import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';\nimport { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireWritableStreamDefaultWriter,\n IsWritableStream,\n IsWritableStreamLocked,\n WritableStream,\n WritableStreamAbort,\n WritableStreamCloseQueuedOrInFlight,\n WritableStreamDefaultWriterCloseWithErrorPropagation,\n WritableStreamDefaultWriterRelease,\n WritableStreamDefaultWriterWrite\n} from '../writable-stream';\nimport assert from '../../stub/assert';\nimport {\n newPromise,\n PerformPromiseThen,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n uponFulfillment,\n uponPromise,\n uponRejection\n} from '../helpers/webidl';\nimport { noop } from '../../utils';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\nimport { DOMException } from '../../stub/dom-exception';\n\nexport function ReadableStreamPipeTo(source: ReadableStream,\n dest: WritableStream,\n preventClose: boolean,\n preventAbort: boolean,\n preventCancel: boolean,\n signal: AbortSignal | undefined): Promise {\n assert(IsReadableStream(source));\n assert(IsWritableStream(dest));\n assert(typeof preventClose === 'boolean');\n assert(typeof preventAbort === 'boolean');\n assert(typeof preventCancel === 'boolean');\n assert(signal === undefined || isAbortSignal(signal));\n assert(!IsReadableStreamLocked(source));\n assert(!IsWritableStreamLocked(dest));\n\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n\n source._disturbed = true;\n\n let shuttingDown = false;\n\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n\n return newPromise((resolve, reject) => {\n let abortAlgorithm: () => void;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions: Array<() => Promise> = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n\n signal.addEventListener('abort', abortAlgorithm);\n }\n\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done: boolean) {\n if (done) {\n resolveLoop();\n } else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n\n next(false);\n });\n }\n\n function pipeStep(): Promise {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(\n reader,\n {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n }\n );\n });\n });\n }\n\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n } else {\n shutdown(true, storedError);\n }\n return null;\n });\n\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n } else {\n shutdown();\n }\n return null;\n });\n\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n } else {\n shutdown(true, destClosed);\n }\n }\n\n setPromiseIsHandledToTrue(pipeLoop());\n\n function waitForWritesToFinish(): Promise {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(\n currentWrite,\n () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined\n );\n }\n\n function isOrBecomesErrored(stream: ReadableStream | WritableStream,\n promise: Promise,\n action: (reason: any) => null) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n } else {\n uponRejection(promise, action);\n }\n }\n\n function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise, action: () => null) {\n if (stream._state === 'closed') {\n action();\n } else {\n uponFulfillment(promise, action);\n }\n }\n\n function shutdownWithAction(action: () => Promise, originalIsError?: boolean, originalError?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n } else {\n doTheRest();\n }\n\n function doTheRest(): null {\n uponPromise(\n action(),\n () => finalize(originalIsError, originalError),\n newError => finalize(true, newError)\n );\n return null;\n }\n }\n\n function shutdown(isError?: boolean, error?: any) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n } else {\n finalize(isError, error);\n }\n }\n\n function finalize(isError?: boolean, error?: any): null {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n } else {\n resolve(undefined);\n }\n\n return null;\n }\n });\n}\n","import type { QueuingStrategySizeCallback } from '../queuing-strategy';\nimport assert from '../../stub/assert';\nimport { DequeueValue, EnqueueValueWithSize, type QueuePair, ResetQueue } from '../abstract-ops/queue-with-sizes';\nimport {\n ReadableStreamAddReadRequest,\n ReadableStreamFulfillReadRequest,\n ReadableStreamGetNumReadRequests,\n type ReadRequest\n} from './default-reader';\nimport { SimpleQueue } from '../simple-queue';\nimport { IsReadableStreamLocked, ReadableStream, ReadableStreamClose, ReadableStreamError } from '../readable-stream';\nimport type { ValidatedUnderlyingSource } from './underlying-source';\nimport { setFunctionName, typeIsObject } from '../helpers/miscellaneous';\nimport { CancelSteps, PullSteps, ReleaseSteps } from '../abstract-ops/internal-methods';\nimport { promiseResolvedWith, uponPromise } from '../helpers/webidl';\n\n/**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\nexport class ReadableStreamDefaultController {\n /** @internal */\n _controlledReadableStream!: ReadableStream;\n /** @internal */\n _queue!: SimpleQueue>;\n /** @internal */\n _queueTotalSize!: number;\n /** @internal */\n _started!: boolean;\n /** @internal */\n _closeRequested!: boolean;\n /** @internal */\n _pullAgain!: boolean;\n /** @internal */\n _pulling !: boolean;\n /** @internal */\n _strategySizeAlgorithm!: QueuingStrategySizeCallback;\n /** @internal */\n _strategyHWM!: number;\n /** @internal */\n _pullAlgorithm!: () => Promise;\n /** @internal */\n _cancelAlgorithm!: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize(): number | null {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close(): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('close');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n\n ReadableStreamDefaultControllerClose(this);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the controlled readable stream.\n */\n enqueue(chunk: R): void;\n enqueue(chunk: R = undefined!): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e: any = undefined): void {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n ReadableStreamDefaultControllerError(this, e);\n }\n\n /** @internal */\n [CancelSteps](reason: any): Promise {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n\n /** @internal */\n [PullSteps](readRequest: ReadRequest): void {\n const stream = this._controlledReadableStream;\n\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n } else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n\n readRequest._chunkSteps(chunk);\n } else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n\n /** @internal */\n [ReleaseSteps](): void {\n // Do nothing.\n }\n}\n\nObject.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\nsetFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n}\n\n// Abstract operations for the ReadableStreamDefaultController.\n\nfunction IsReadableStreamDefaultController(x: any): x is ReadableStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n\n return x instanceof ReadableStreamDefaultController;\n}\n\nfunction ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController): void {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n\n assert(!controller._pullAgain);\n\n controller._pulling = true;\n\n const pullPromise = controller._pullAlgorithm();\n uponPromise(\n pullPromise,\n () => {\n controller._pulling = false;\n\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n\n return null;\n },\n e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n }\n );\n}\n\nfunction ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController): boolean {\n const stream = controller._controlledReadableStream;\n\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n\n if (!controller._started) {\n return false;\n }\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n assert(desiredSize !== null);\n if (desiredSize! > 0) {\n return true;\n }\n\n return false;\n}\n\nfunction ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController) {\n controller._pullAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n controller._strategySizeAlgorithm = undefined!;\n}\n\n// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n\nexport function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n controller._closeRequested = true;\n\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n}\n\nexport function ReadableStreamDefaultControllerEnqueue(\n controller: ReadableStreamDefaultController,\n chunk: R\n): void {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n\n const stream = controller._controlledReadableStream;\n\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n } else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n } catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n } catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n}\n\nexport function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController, e: any) {\n const stream = controller._controlledReadableStream;\n\n if (stream._state !== 'readable') {\n return;\n }\n\n ResetQueue(controller);\n\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n}\n\nexport function ReadableStreamDefaultControllerGetDesiredSize(\n controller: ReadableStreamDefaultController\n): number | null {\n const state = controller._controlledReadableStream._state;\n\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n\n return controller._strategyHWM - controller._queueTotalSize;\n}\n\n// This is used in the implementation of TransformStream.\nexport function ReadableStreamDefaultControllerHasBackpressure(\n controller: ReadableStreamDefaultController\n): boolean {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n\n return true;\n}\n\nexport function ReadableStreamDefaultControllerCanCloseOrEnqueue(\n controller: ReadableStreamDefaultController\n): boolean {\n const state = controller._controlledReadableStream._state;\n\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n\n return false;\n}\n\nexport function SetUpReadableStreamDefaultController(stream: ReadableStream,\n controller: ReadableStreamDefaultController,\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback) {\n assert(stream._readableStreamController === undefined);\n\n controller._controlledReadableStream = stream;\n\n controller._queue = undefined!;\n controller._queueTotalSize = undefined!;\n ResetQueue(controller);\n\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n stream._readableStreamController = controller;\n\n const startResult = startAlgorithm();\n uponPromise(\n promiseResolvedWith(startResult),\n () => {\n controller._started = true;\n\n assert(!controller._pulling);\n assert(!controller._pullAgain);\n\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n },\n r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n }\n );\n}\n\nexport function SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n stream: ReadableStream,\n underlyingSource: ValidatedUnderlyingSource,\n highWaterMark: number,\n sizeAlgorithm: QueuingStrategySizeCallback\n) {\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n\n let startAlgorithm: () => void | PromiseLike;\n let pullAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start!(controller);\n } else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull!(controller);\n } else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n}\n\n// Helper functions for the ReadableStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n}\n","import {\n CreateReadableByteStream,\n CreateReadableStream,\n type DefaultReadableStream,\n IsReadableStream,\n type ReadableByteStream,\n ReadableStream,\n ReadableStreamCancel,\n type ReadableStreamReader\n} from '../readable-stream';\nimport { ReadableStreamReaderGenericRelease } from './generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReaderRead,\n type ReadRequest\n} from './default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReaderRead,\n type ReadIntoRequest\n} from './byob-reader';\nimport assert from '../../stub/assert';\nimport { newPromise, promiseResolvedWith, queueMicrotask, uponRejection } from '../helpers/webidl';\nimport {\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError\n} from './default-controller';\nimport {\n IsReadableByteStreamController,\n ReadableByteStreamControllerClose,\n ReadableByteStreamControllerEnqueue,\n ReadableByteStreamControllerError,\n ReadableByteStreamControllerGetBYOBRequest,\n ReadableByteStreamControllerRespond,\n ReadableByteStreamControllerRespondWithNewView\n} from './byte-stream-controller';\nimport { CreateArrayFromList } from '../abstract-ops/ecmascript';\nimport { CloneAsUint8Array } from '../abstract-ops/miscellaneous';\nimport type { NonShared } from '../helpers/array-buffer-view';\n\nexport function ReadableStreamTee(stream: ReadableStream,\n cloneForBranch2: boolean): [ReadableStream, ReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream as unknown as ReadableByteStream) as\n unknown as [ReadableStream, ReadableStream];\n }\n return ReadableStreamDefaultTee(stream, cloneForBranch2);\n}\n\nexport function ReadableStreamDefaultTee(\n stream: ReadableStream,\n cloneForBranch2: boolean\n): [DefaultReadableStream, DefaultReadableStream] {\n assert(IsReadableStream(stream));\n assert(typeof cloneForBranch2 === 'boolean');\n\n const reader = AcquireReadableStreamDefaultReader(stream);\n\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: DefaultReadableStream;\n let branch2: DefaultReadableStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function pullAlgorithm(): Promise {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const readRequest: ReadRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm() {\n // do nothing\n }\n\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n\n uponRejection(reader._closedPromise, (r: any) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n\n return [branch1, branch2];\n}\n\nexport function ReadableByteStreamTee(stream: ReadableByteStream): [ReadableByteStream, ReadableByteStream] {\n assert(IsReadableStream(stream));\n assert(IsReadableByteStreamController(stream._readableStreamController));\n\n let reader: ReadableStreamReader> = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1: any;\n let reason2: any;\n let branch1: ReadableByteStream;\n let branch2: ReadableByteStream;\n\n let resolveCancelPromise: (value: undefined | Promise) => void;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n\n function forwardReaderError(thisReader: ReadableStreamReader>) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n assert(reader._readIntoRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n\n const readRequest: ReadRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n\n function pullWithBYOBReader(view: NonShared, forBranch2: boolean) {\n if (IsReadableStreamDefaultReader>(reader)) {\n assert(reader._readRequests.length === 0);\n ReadableStreamReaderGenericRelease(reader);\n\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n\n const readIntoRequest: ReadIntoRequest> = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n } catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n } else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n } else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n\n if (chunk !== undefined) {\n assert(chunk.byteLength === 0);\n\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n\n function pull1Algorithm(): Promise {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, false);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function pull2Algorithm(): Promise {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n\n reading = true;\n\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n } else {\n pullWithBYOBReader(byobRequest._view!, true);\n }\n\n return promiseResolvedWith(undefined);\n }\n\n function cancel1Algorithm(reason: any): Promise {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function cancel2Algorithm(reason: any): Promise {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n\n function startAlgorithm(): void {\n return;\n }\n\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n\n forwardReaderError(reader);\n\n return [branch1, branch2];\n}\n","import { typeIsObject } from '../helpers/miscellaneous';\nimport type { ReadableStreamDefaultReadResult } from './default-reader';\n\n/**\n * A common interface for a `ReadadableStream` implementation.\n *\n * @public\n */\nexport interface ReadableStreamLike {\n readonly locked: boolean;\n\n getReader(): ReadableStreamDefaultReaderLike;\n}\n\n/**\n * A common interface for a `ReadableStreamDefaultReader` implementation.\n *\n * @public\n */\nexport interface ReadableStreamDefaultReaderLike {\n readonly closed: Promise;\n\n cancel(reason?: any): Promise;\n\n read(): Promise>;\n\n releaseLock(): void;\n}\n\nexport function isReadableStreamLike(stream: unknown): stream is ReadableStreamLike {\n return typeIsObject(stream) && typeof (stream as ReadableStreamLike).getReader !== 'undefined';\n}\n","import { CreateReadableStream, type DefaultReadableStream } from '../readable-stream';\nimport {\n isReadableStreamLike,\n type ReadableStreamDefaultReaderLike,\n type ReadableStreamLike\n} from './readable-stream-like';\nimport { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue } from './default-controller';\nimport { GetIterator, GetMethod, IteratorComplete, IteratorNext, IteratorValue } from '../abstract-ops/ecmascript';\nimport { promiseRejectedWith, promiseResolvedWith, reflectCall, transformPromiseWith } from '../helpers/webidl';\nimport { typeIsObject } from '../helpers/miscellaneous';\nimport { noop } from '../../utils';\n\nexport function ReadableStreamFrom(\n source: Iterable | AsyncIterable | ReadableStreamLike\n): DefaultReadableStream {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n}\n\nexport function ReadableStreamFromIterable(asyncIterable: Iterable | AsyncIterable): DefaultReadableStream {\n let stream: DefaultReadableStream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n const iterator = iteratorRecord.iterator;\n let returnMethod: (typeof iterator)['return'] | undefined;\n try {\n returnMethod = GetMethod(iterator, 'return');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult: IteratorResult | Promise>;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n } catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n\nexport function ReadableStreamFromDefaultReader(\n reader: ReadableStreamDefaultReaderLike\n): DefaultReadableStream {\n let stream: DefaultReadableStream;\n\n const startAlgorithm = noop;\n\n function pullAlgorithm(): Promise {\n let readPromise;\n try {\n readPromise = reader.read();\n } catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n } else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n\n function cancelAlgorithm(reason: any): Promise {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n } catch (e) {\n return promiseRejectedWith(e);\n }\n }\n\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n}\n","import { assertDictionary, assertFunction, convertUnsignedLongLongWithEnforceRange } from './basic';\nimport type {\n ReadableStreamController,\n UnderlyingByteSource,\n UnderlyingDefaultOrByteSource,\n UnderlyingDefaultOrByteSourcePullCallback,\n UnderlyingDefaultOrByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n ValidatedUnderlyingDefaultOrByteSource\n} from '../readable-stream/underlying-source';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\n\nexport function convertUnderlyingDefaultOrByteSource(\n source: UnderlyingSource | UnderlyingByteSource | null,\n context: string\n): ValidatedUnderlyingDefaultOrByteSource {\n assertDictionary(source, context);\n const original = source as (UnderlyingDefaultOrByteSource | null);\n const autoAllocateChunkSize = original?.autoAllocateChunkSize;\n const cancel = original?.cancel;\n const pull = original?.pull;\n const start = original?.start;\n const type = original?.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(\n autoAllocateChunkSize,\n `${context} has member 'autoAllocateChunkSize' that`\n ),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original!, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original!, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n}\n\nfunction convertUnderlyingSourceCancelCallback(\n fn: UnderlyingSourceCancelCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n\nfunction convertUnderlyingSourcePullCallback(\n fn: UnderlyingDefaultOrByteSourcePullCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): (controller: ReadableStreamController) => Promise {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertUnderlyingSourceStartCallback(\n fn: UnderlyingDefaultOrByteSourceStartCallback,\n original: UnderlyingDefaultOrByteSource,\n context: string\n): UnderlyingDefaultOrByteSourceStartCallback {\n assertFunction(fn, context);\n return (controller: ReadableStreamController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertReadableStreamType(type: string, context: string): 'bytes' {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n}\n","import { assertDictionary } from './basic';\nimport type {\n ReadableStreamIteratorOptions,\n ValidatedReadableStreamIteratorOptions\n} from '../readable-stream/iterator-options';\n\nexport function convertIteratorOptions(options: ReadableStreamIteratorOptions | null | undefined,\n context: string): ValidatedReadableStreamIteratorOptions {\n assertDictionary(options, context);\n const preventCancel = options?.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n}\n","import { assertDictionary } from './basic';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from '../readable-stream/pipe-options';\nimport { type AbortSignal, isAbortSignal } from '../abort-signal';\n\nexport function convertPipeOptions(options: StreamPipeOptions | null | undefined,\n context: string): ValidatedStreamPipeOptions {\n assertDictionary(options, context);\n const preventAbort = options?.preventAbort;\n const preventCancel = options?.preventCancel;\n const preventClose = options?.preventClose;\n const signal = options?.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n}\n\nfunction assertAbortSignal(signal: unknown, context: string): asserts signal is AbortSignal {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n}\n","import { assertDictionary, assertRequiredField } from './basic';\nimport { ReadableStream } from '../readable-stream';\nimport { WritableStream } from '../writable-stream';\nimport { assertReadableStream } from './readable-stream';\nimport { assertWritableStream } from './writable-stream';\n\nexport function convertReadableWritablePair(\n pair: { readable: RS; writable: WS } | null | undefined,\n context: string\n): { readable: RS; writable: WS } {\n assertDictionary(pair, context);\n\n const readable = pair?.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n\n const writable = pair?.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n\n return { readable, writable };\n}\n","import assert from '../stub/assert';\nimport {\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith\n} from './helpers/webidl';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { AcquireReadableStreamAsyncIterator, type ReadableStreamAsyncIterator } from './readable-stream/async-iterator';\nimport { defaultReaderClosedPromiseReject, defaultReaderClosedPromiseResolve } from './readable-stream/generic-reader';\nimport {\n AcquireReadableStreamDefaultReader,\n IsReadableStreamDefaultReader,\n ReadableStreamDefaultReader,\n ReadableStreamDefaultReaderErrorReadRequests,\n type ReadableStreamDefaultReadResult\n} from './readable-stream/default-reader';\nimport {\n AcquireReadableStreamBYOBReader,\n IsReadableStreamBYOBReader,\n ReadableStreamBYOBReader,\n ReadableStreamBYOBReaderErrorReadIntoRequests,\n type ReadableStreamBYOBReadResult\n} from './readable-stream/byob-reader';\nimport { ReadableStreamPipeTo } from './readable-stream/pipe';\nimport { ReadableStreamTee } from './readable-stream/tee';\nimport { ReadableStreamFrom } from './readable-stream/from';\nimport { IsWritableStream, IsWritableStreamLocked, WritableStream } from './writable-stream';\nimport { SimpleQueue } from './simple-queue';\nimport {\n ReadableByteStreamController,\n ReadableStreamBYOBRequest,\n SetUpReadableByteStreamController,\n SetUpReadableByteStreamControllerFromUnderlyingSource\n} from './readable-stream/byte-stream-controller';\nimport {\n ReadableStreamDefaultController,\n SetUpReadableStreamDefaultController,\n SetUpReadableStreamDefaultControllerFromUnderlyingSource\n} from './readable-stream/default-controller';\nimport type {\n UnderlyingByteSource,\n UnderlyingByteSourcePullCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingSource,\n UnderlyingSourceCancelCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceStartCallback\n} from './readable-stream/underlying-source';\nimport { noop } from '../utils';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { CreateArrayFromList, SymbolAsyncIterator } from './abstract-ops/ecmascript';\nimport { CancelSteps } from './abstract-ops/internal-methods';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { assertObject, assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport { convertUnderlyingDefaultOrByteSource } from './validators/underlying-source';\nimport type {\n ReadableStreamBYOBReaderReadOptions,\n ReadableStreamGetReaderOptions\n} from './readable-stream/reader-options';\nimport { convertReaderOptions } from './validators/reader-options';\nimport type { StreamPipeOptions, ValidatedStreamPipeOptions } from './readable-stream/pipe-options';\nimport type { ReadableStreamIteratorOptions } from './readable-stream/iterator-options';\nimport { convertIteratorOptions } from './validators/iterator-options';\nimport { convertPipeOptions } from './validators/pipe-options';\nimport type { ReadableWritablePair } from './readable-stream/readable-writable-pair';\nimport { convertReadableWritablePair } from './validators/readable-writable-pair';\nimport type { ReadableStreamDefaultReaderLike, ReadableStreamLike } from './readable-stream/readable-stream-like';\nimport type { NonShared } from './helpers/array-buffer-view';\n\nexport type DefaultReadableStream = ReadableStream & {\n _readableStreamController: ReadableStreamDefaultController\n};\n\nexport type ReadableByteStream = ReadableStream> & {\n _readableStreamController: ReadableByteStreamController\n};\n\ntype ReadableStreamState = 'readable' | 'closed' | 'errored';\n\n/**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\nexport class ReadableStream implements AsyncIterable {\n /** @internal */\n _state!: ReadableStreamState;\n /** @internal */\n _reader: ReadableStreamReader | undefined;\n /** @internal */\n _storedError: any;\n /** @internal */\n _disturbed!: boolean;\n /** @internal */\n _readableStreamController!: ReadableStreamDefaultController | ReadableByteStreamController;\n\n constructor(underlyingSource: UnderlyingByteSource, strategy?: { highWaterMark?: number; size?: undefined });\n constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy);\n constructor(rawUnderlyingSource: UnderlyingSource | UnderlyingByteSource | null | undefined = {},\n rawStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n } else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n\n InitializeReadableStream(this);\n\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(\n this as unknown as ReadableByteStream,\n underlyingSource,\n highWaterMark\n );\n } else {\n assert(underlyingSource.type === undefined);\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(\n this,\n underlyingSource,\n highWaterMark,\n sizeAlgorithm\n );\n }\n }\n\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked(): boolean {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('locked');\n }\n\n return IsReadableStreamLocked(this);\n }\n\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason: any = undefined): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('cancel'));\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n\n return ReadableStreamCancel(this, reason);\n }\n\n /**\n * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader.\n *\n * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams,\n * i.e. streams which were constructed specifically with the ability to handle \"bring your own buffer\" reading.\n * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its\n * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise\n * control over allocation.\n */\n getReader({ mode }: { mode: 'byob' }): ReadableStreamBYOBReader;\n /**\n * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader.\n * While the stream is locked, no other reader can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to consume a stream\n * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours\n * or cancel the stream, which would interfere with your abstraction.\n */\n getReader(): ReadableStreamDefaultReader;\n getReader(\n rawOptions: ReadableStreamGetReaderOptions | null | undefined = undefined\n ): ReadableStreamDefaultReader | ReadableStreamBYOBReader {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('getReader');\n }\n\n const options = convertReaderOptions(rawOptions, 'First parameter');\n\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n\n assert(options.mode === 'byob');\n return AcquireReadableStreamBYOBReader(this as unknown as ReadableByteStream);\n }\n\n /**\n * Provides a convenient, chainable way of piping this readable stream through a transform stream\n * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream\n * into the writable side of the supplied pair, and returns the readable side for further use.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeThrough(\n transform: { readable: RS; writable: WritableStream },\n options?: StreamPipeOptions\n ): RS;\n pipeThrough(\n rawTransform: { readable: RS; writable: WritableStream } | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}\n ): RS {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n\n const promise = ReadableStreamPipeTo(\n this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n\n setPromiseIsHandledToTrue(promise);\n\n return transform.readable;\n }\n\n /**\n * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under\n * various error conditions can be customized with a number of passed options. It returns a promise that fulfills\n * when the piping process completes successfully, or rejects if any errors were encountered.\n *\n * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader.\n */\n pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise;\n pipeTo(destination: WritableStream | null | undefined,\n rawOptions: StreamPipeOptions | null | undefined = {}): Promise {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException('pipeTo'));\n }\n\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(\n new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`)\n );\n }\n\n let options: ValidatedStreamPipeOptions;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n } catch (e) {\n return promiseRejectedWith(e);\n }\n\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream')\n );\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(\n new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream')\n );\n }\n\n return ReadableStreamPipeTo(\n this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal\n );\n }\n\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee(): [ReadableStream, ReadableStream] {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('tee');\n }\n\n const branches = ReadableStreamTee(this, false);\n return CreateArrayFromList(branches);\n }\n\n /**\n * Asynchronously iterates over the chunks in the stream's internal queue.\n *\n * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader.\n * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method\n * is called, e.g. by breaking out of the loop.\n *\n * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also\n * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing\n * `true` for the `preventCancel` option.\n */\n values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n values(rawOptions: ReadableStreamIteratorOptions | null | undefined = undefined): ReadableStreamAsyncIterator {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException('values');\n }\n\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n\n /**\n * {@inheritDoc ReadableStream.values}\n */\n [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator;\n\n [SymbolAsyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator {\n // Stub implementation, overridden below\n return this.values(options);\n }\n\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream {\n return ReadableStreamFrom(asyncIterable);\n }\n}\n\nObject.defineProperties(ReadableStream, {\n from: { enumerable: true }\n});\nObject.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n});\nsetFunctionName(ReadableStream.from, 'from');\nsetFunctionName(ReadableStream.prototype.cancel, 'cancel');\nsetFunctionName(ReadableStream.prototype.getReader, 'getReader');\nsetFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\nsetFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\nsetFunctionName(ReadableStream.prototype.tee, 'tee');\nsetFunctionName(ReadableStream.prototype.values, 'values');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n}\nObject.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n});\n\nexport type {\n ReadableStreamAsyncIterator,\n ReadableStreamDefaultReadResult,\n ReadableStreamBYOBReadResult,\n ReadableStreamBYOBReaderReadOptions,\n UnderlyingByteSource,\n UnderlyingSource,\n UnderlyingSourceStartCallback,\n UnderlyingSourcePullCallback,\n UnderlyingSourceCancelCallback,\n UnderlyingByteSourceStartCallback,\n UnderlyingByteSourcePullCallback,\n StreamPipeOptions,\n ReadableWritablePair,\n ReadableStreamIteratorOptions,\n ReadableStreamLike,\n ReadableStreamDefaultReaderLike\n};\n\n// Abstract operations for the ReadableStream.\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n highWaterMark = 1,\n sizeAlgorithm: QueuingStrategySizeCallback = () => 1\n): DefaultReadableStream {\n assert(IsNonNegativeNumber(highWaterMark));\n\n const stream: DefaultReadableStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableStreamDefaultController = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(\n stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm\n );\n\n return stream;\n}\n\n// Throws if and only if startAlgorithm throws.\nexport function CreateReadableByteStream(\n startAlgorithm: () => void | PromiseLike,\n pullAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise\n): ReadableByteStream {\n const stream: ReadableByteStream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n\n const controller: ReadableByteStreamController = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n\n return stream;\n}\n\nfunction InitializeReadableStream(stream: ReadableStream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n}\n\nexport function IsReadableStream(x: unknown): x is ReadableStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n\n return x instanceof ReadableStream;\n}\n\nexport function IsReadableStreamDisturbed(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n return stream._disturbed;\n}\n\nexport function IsReadableStreamLocked(stream: ReadableStream): boolean {\n assert(IsReadableStream(stream));\n\n if (stream._reader === undefined) {\n return false;\n }\n\n return true;\n}\n\n// ReadableStream API exposed for controllers.\n\nexport function ReadableStreamCancel(stream: ReadableStream, reason: any): Promise {\n stream._disturbed = true;\n\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n\n ReadableStreamClose(stream);\n\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n}\n\nexport function ReadableStreamClose(stream: ReadableStream): void {\n assert(stream._state === 'readable');\n\n stream._state = 'closed';\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseResolve(reader);\n\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n}\n\nexport function ReadableStreamError(stream: ReadableStream, e: any): void {\n assert(IsReadableStream(stream));\n assert(stream._state === 'readable');\n\n stream._state = 'errored';\n stream._storedError = e;\n\n const reader = stream._reader;\n\n if (reader === undefined) {\n return;\n }\n\n defaultReaderClosedPromiseReject(reader, e);\n\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n } else {\n assert(IsReadableStreamBYOBReader(reader));\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n}\n\n// Readers\n\nexport type ReadableStreamReader = ReadableStreamDefaultReader | ReadableStreamBYOBReader;\n\nexport {\n ReadableStreamDefaultReader,\n ReadableStreamBYOBReader\n};\n\n// Controllers\n\nexport {\n ReadableStreamDefaultController,\n ReadableStreamBYOBRequest,\n ReadableByteStreamController\n};\n\n// Helper functions for the ReadableStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n}\n","import type { QueuingStrategyInit } from '../queuing-strategy';\nimport { assertDictionary, assertRequiredField, convertUnrestrictedDouble } from './basic';\n\nexport function convertQueuingStrategyInit(init: QueuingStrategyInit | null | undefined,\n context: string): QueuingStrategyInit {\n assertDictionary(init, context);\n const highWaterMark = init?.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst byteLengthSizeFunction = (chunk: ArrayBufferView): number => {\n return chunk.byteLength;\n};\nsetFunctionName(byteLengthSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\nexport default class ByteLengthQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _byteLengthQueuingStrategyHighWaterMark: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size(): (chunk: ArrayBufferView) => number {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n}\n\nObject.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the ByteLengthQueuingStrategy.\n\nfunction byteLengthBrandCheckException(name: string): TypeError {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n}\n\nexport function IsByteLengthQueuingStrategy(x: any): x is ByteLengthQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof ByteLengthQueuingStrategy;\n}\n","import type { QueuingStrategy, QueuingStrategyInit } from './queuing-strategy';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { assertRequiredArgument } from './validators/basic';\nimport { convertQueuingStrategyInit } from './validators/queuing-strategy-init';\n\n// The size function must not have a prototype property nor be a constructor\nconst countSizeFunction = (): 1 => {\n return 1;\n};\nsetFunctionName(countSizeFunction, 'size');\n\n/**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\nexport default class CountQueuingStrategy implements QueuingStrategy {\n /** @internal */\n readonly _countQueuingStrategyHighWaterMark!: number;\n\n constructor(options: QueuingStrategyInit) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark(): number {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size(): (chunk: any) => 1 {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n}\n\nObject.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n}\n\n// Helper functions for the CountQueuingStrategy.\n\nfunction countBrandCheckException(name: string): TypeError {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n}\n\nexport function IsCountQueuingStrategy(x: any): x is CountQueuingStrategy {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n\n return x instanceof CountQueuingStrategy;\n}\n","import { assertDictionary, assertFunction } from './basic';\nimport { promiseCall, reflectCall } from '../helpers/webidl';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from '../transform-stream/transformer';\nimport { TransformStreamDefaultController } from '../transform-stream';\n\nexport function convertTransformer(original: Transformer | null,\n context: string): ValidatedTransformer {\n assertDictionary(original, context);\n const cancel = original?.cancel;\n const flush = original?.flush;\n const readableType = original?.readableType;\n const start = original?.start;\n const transform = original?.transform;\n const writableType = original?.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original!, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original!, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original!, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original!, `${context} has member 'transform' that`),\n writableType\n };\n}\n\nfunction convertTransformerFlushCallback(\n fn: TransformerFlushCallback,\n original: Transformer,\n context: string\n): (controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => promiseCall(fn, original, [controller]);\n}\n\nfunction convertTransformerStartCallback(\n fn: TransformerStartCallback,\n original: Transformer,\n context: string\n): TransformerStartCallback {\n assertFunction(fn, context);\n return (controller: TransformStreamDefaultController) => reflectCall(fn, original, [controller]);\n}\n\nfunction convertTransformerTransformCallback(\n fn: TransformerTransformCallback,\n original: Transformer,\n context: string\n): (chunk: I, controller: TransformStreamDefaultController) => Promise {\n assertFunction(fn, context);\n return (chunk: I, controller: TransformStreamDefaultController) => promiseCall(fn, original, [chunk, controller]);\n}\n\nfunction convertTransformerCancelCallback(\n fn: TransformerCancelCallback,\n original: Transformer,\n context: string\n): (reason: any) => Promise {\n assertFunction(fn, context);\n return (reason: any) => promiseCall(fn, original, [reason]);\n}\n","import assert from '../stub/assert';\nimport {\n newPromise,\n promiseRejectedWith,\n promiseResolvedWith,\n setPromiseIsHandledToTrue,\n transformPromiseWith,\n uponPromise\n} from './helpers/webidl';\nimport { CreateReadableStream, type DefaultReadableStream, ReadableStream } from './readable-stream';\nimport {\n ReadableStreamDefaultControllerCanCloseOrEnqueue,\n ReadableStreamDefaultControllerClose,\n ReadableStreamDefaultControllerEnqueue,\n ReadableStreamDefaultControllerError,\n ReadableStreamDefaultControllerGetDesiredSize,\n ReadableStreamDefaultControllerHasBackpressure\n} from './readable-stream/default-controller';\nimport type { QueuingStrategy, QueuingStrategySizeCallback } from './queuing-strategy';\nimport { CreateWritableStream, WritableStream, WritableStreamDefaultControllerErrorIfNeeded } from './writable-stream';\nimport { setFunctionName, typeIsObject } from './helpers/miscellaneous';\nimport { IsNonNegativeNumber } from './abstract-ops/miscellaneous';\nimport { convertQueuingStrategy } from './validators/queuing-strategy';\nimport { ExtractHighWaterMark, ExtractSizeAlgorithm } from './abstract-ops/queuing-strategy';\nimport type {\n Transformer,\n TransformerCancelCallback,\n TransformerFlushCallback,\n TransformerStartCallback,\n TransformerTransformCallback,\n ValidatedTransformer\n} from './transform-stream/transformer';\nimport { convertTransformer } from './validators/transformer';\n\n// Class TransformStream\n\n/**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\nexport class TransformStream {\n /** @internal */\n _writable!: WritableStream;\n /** @internal */\n _readable!: DefaultReadableStream;\n /** @internal */\n _backpressure!: boolean;\n /** @internal */\n _backpressureChangePromise!: Promise;\n /** @internal */\n _backpressureChangePromise_resolve!: () => void;\n /** @internal */\n _transformStreamController!: TransformStreamDefaultController;\n\n constructor(\n transformer?: Transformer,\n writableStrategy?: QueuingStrategy,\n readableStrategy?: QueuingStrategy\n );\n constructor(rawTransformer: Transformer | null | undefined = {},\n rawWritableStrategy: QueuingStrategy | null | undefined = {},\n rawReadableStrategy: QueuingStrategy | null | undefined = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(\n this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm\n );\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n } else {\n startPromise_resolve(undefined);\n }\n }\n\n /**\n * The readable side of the transform stream.\n */\n get readable(): ReadableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n\n return this._readable;\n }\n\n /**\n * The writable side of the transform stream.\n */\n get writable(): WritableStream {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n\n return this._writable;\n }\n}\n\nObject.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n});\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n}\n\nexport type {\n Transformer,\n TransformerCancelCallback,\n TransformerStartCallback,\n TransformerFlushCallback,\n TransformerTransformCallback\n};\n\n// Transform Stream Abstract Operations\n\nexport function CreateTransformStream(startAlgorithm: () => void | PromiseLike,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise,\n writableHighWaterMark = 1,\n writableSizeAlgorithm: QueuingStrategySizeCallback = () => 1,\n readableHighWaterMark = 0,\n readableSizeAlgorithm: QueuingStrategySizeCallback = () => 1) {\n assert(IsNonNegativeNumber(writableHighWaterMark));\n assert(IsNonNegativeNumber(readableHighWaterMark));\n\n const stream: TransformStream = Object.create(TransformStream.prototype);\n\n let startPromise_resolve!: (value: void | PromiseLike) => void;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n\n InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n\n const startResult = startAlgorithm();\n startPromise_resolve(startResult);\n return stream;\n}\n\nfunction InitializeTransformStream(stream: TransformStream,\n startPromise: Promise,\n writableHighWaterMark: number,\n writableSizeAlgorithm: QueuingStrategySizeCallback,\n readableHighWaterMark: number,\n readableSizeAlgorithm: QueuingStrategySizeCallback) {\n function startAlgorithm(): Promise {\n return startPromise;\n }\n\n function writeAlgorithm(chunk: I): Promise {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n\n function abortAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n\n function closeAlgorithm(): Promise {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm,\n writableHighWaterMark, writableSizeAlgorithm);\n\n function pullAlgorithm(): Promise {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n\n function cancelAlgorithm(reason: any): Promise {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark,\n readableSizeAlgorithm);\n\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined!;\n stream._backpressureChangePromise = undefined!;\n stream._backpressureChangePromise_resolve = undefined!;\n TransformStreamSetBackpressure(stream, true);\n\n stream._transformStreamController = undefined!;\n}\n\nfunction IsTransformStream(x: unknown): x is TransformStream {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n\n return x instanceof TransformStream;\n}\n\n// This is a no-op if both sides are already errored.\nfunction TransformStreamError(stream: TransformStream, e: any) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n}\n\nfunction TransformStreamErrorWritableAndUnblockWrite(stream: TransformStream, e: any) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n}\n\nfunction TransformStreamUnblockWrite(stream: TransformStream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure()\n // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time\n // _backpressure is set.\n TransformStreamSetBackpressure(stream, false);\n }\n}\n\nfunction TransformStreamSetBackpressure(stream: TransformStream, backpressure: boolean) {\n // Passes also when called during construction.\n assert(stream._backpressure !== backpressure);\n\n if (stream._backpressureChangePromise !== undefined) {\n stream._backpressureChangePromise_resolve();\n }\n\n stream._backpressureChangePromise = newPromise(resolve => {\n stream._backpressureChangePromise_resolve = resolve;\n });\n\n stream._backpressure = backpressure;\n}\n\n// Class TransformStreamDefaultController\n\n/**\n * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}.\n *\n * @public\n */\nexport class TransformStreamDefaultController {\n /** @internal */\n _controlledTransformStream: TransformStream;\n /** @internal */\n _finishPromise: Promise | undefined;\n /** @internal */\n _finishPromise_resolve?: (value?: undefined) => void;\n /** @internal */\n _finishPromise_reject?: (reason: any) => void;\n /** @internal */\n _transformAlgorithm: (chunk: any) => Promise;\n /** @internal */\n _flushAlgorithm: () => Promise;\n /** @internal */\n _cancelAlgorithm: (reason: any) => Promise;\n\n private constructor() {\n throw new TypeError('Illegal constructor');\n }\n\n /**\n * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full.\n */\n get desiredSize(): number | null {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n\n const readableController = this._controlledTransformStream._readable._readableStreamController;\n return ReadableStreamDefaultControllerGetDesiredSize(readableController);\n }\n\n /**\n * Enqueues the given chunk `chunk` in the readable side of the controlled transform stream.\n */\n enqueue(chunk: O): void;\n enqueue(chunk: O = undefined!): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n\n TransformStreamDefaultControllerEnqueue(this, chunk);\n }\n\n /**\n * Errors both the readable side and the writable side of the controlled transform stream, making all future\n * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.\n */\n error(reason: any = undefined): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n\n TransformStreamDefaultControllerError(this, reason);\n }\n\n /**\n * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate(): void {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n\n TransformStreamDefaultControllerTerminate(this);\n }\n}\n\nObject.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n});\nsetFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\nsetFunctionName(TransformStreamDefaultController.prototype.error, 'error');\nsetFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\nif (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n}\n\n// Transform Stream Default Controller Abstract Operations\n\nfunction IsTransformStreamDefaultController(x: any): x is TransformStreamDefaultController {\n if (!typeIsObject(x)) {\n return false;\n }\n\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n\n return x instanceof TransformStreamDefaultController;\n}\n\nfunction SetUpTransformStreamDefaultController(stream: TransformStream,\n controller: TransformStreamDefaultController,\n transformAlgorithm: (chunk: I) => Promise,\n flushAlgorithm: () => Promise,\n cancelAlgorithm: (reason: any) => Promise) {\n assert(IsTransformStream(stream));\n assert(stream._transformStreamController === undefined);\n\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nfunction SetUpTransformStreamDefaultControllerFromTransformer(stream: TransformStream,\n transformer: ValidatedTransformer) {\n const controller: TransformStreamDefaultController = Object.create(TransformStreamDefaultController.prototype);\n\n let transformAlgorithm: (chunk: I) => Promise;\n let flushAlgorithm: () => Promise;\n let cancelAlgorithm: (reason: any) => Promise;\n\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform!(chunk, controller);\n } else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk as unknown as O);\n return promiseResolvedWith(undefined);\n } catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush!(controller);\n } else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel!(reason);\n } else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n}\n\nfunction TransformStreamDefaultControllerClearAlgorithms(controller: TransformStreamDefaultController) {\n controller._transformAlgorithm = undefined!;\n controller._flushAlgorithm = undefined!;\n controller._cancelAlgorithm = undefined!;\n}\n\nfunction TransformStreamDefaultControllerEnqueue(controller: TransformStreamDefaultController, chunk: O) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n\n // We throttle transform invocations based on the backpressure of the ReadableStream, but we still\n // accept TransformStreamDefaultControllerEnqueue() calls.\n\n try {\n ReadableStreamDefaultControllerEnqueue(readableController, chunk);\n } catch (e) {\n // This happens when readableStrategy.size() throws.\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n\n throw stream._readable._storedError;\n }\n\n const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);\n if (backpressure !== stream._backpressure) {\n assert(backpressure);\n TransformStreamSetBackpressure(stream, true);\n }\n}\n\nfunction TransformStreamDefaultControllerError(controller: TransformStreamDefaultController, e: any) {\n TransformStreamError(controller._controlledTransformStream, e);\n}\n\nfunction TransformStreamDefaultControllerPerformTransform(controller: TransformStreamDefaultController,\n chunk: I) {\n const transformPromise = controller._transformAlgorithm(chunk);\n return transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n}\n\nfunction TransformStreamDefaultControllerTerminate(controller: TransformStreamDefaultController) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n\n ReadableStreamDefaultControllerClose(readableController);\n\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n}\n\n// TransformStreamDefaultSink Algorithms\n\nfunction TransformStreamDefaultSinkWriteAlgorithm(stream: TransformStream, chunk: I): Promise {\n assert(stream._writable._state === 'writable');\n\n const controller = stream._transformStreamController;\n\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n assert(backpressureChangePromise !== undefined);\n return transformPromiseWith(backpressureChangePromise, () => {\n const writable = stream._writable;\n const state = writable._state;\n if (state === 'erroring') {\n throw writable._storedError;\n }\n assert(state === 'writable');\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n });\n }\n\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n}\n\nfunction TransformStreamDefaultSinkAbortAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally,\n // we don't run the _cancelAlgorithm again.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerError(readable._readableStreamController, reason);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\nfunction TransformStreamDefaultSinkCloseAlgorithm(stream: TransformStream): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n } else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// TransformStreamDefaultSource Algorithms\n\nfunction TransformStreamDefaultSourcePullAlgorithm(stream: TransformStream): Promise {\n // Invariant. Enforced by the promises returned by start() and pull().\n assert(stream._backpressure);\n\n assert(stream._backpressureChangePromise !== undefined);\n\n TransformStreamSetBackpressure(stream, false);\n\n // Prevent the next pull() call until there is backpressure.\n return stream._backpressureChangePromise;\n}\n\nfunction TransformStreamDefaultSourceCancelAlgorithm(stream: TransformStream, reason: any): Promise {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n\n // stream._writable cannot change after construction, so caching it across a call to user code is safe.\n const writable = stream._writable;\n\n // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or\n // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the\n // _flushAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n\n uponPromise(cancelPromise, () => {\n if (writable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, writable._storedError);\n } else {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n\n return controller._finishPromise;\n}\n\n// Helper functions for the TransformStreamDefaultController.\n\nfunction defaultControllerBrandCheckException(name: string): TypeError {\n return new TypeError(\n `TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n}\n\nexport function defaultControllerFinishPromiseResolve(controller: TransformStreamDefaultController) {\n if (controller._finishPromise_resolve === undefined) {\n return;\n }\n\n controller._finishPromise_resolve();\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\nexport function defaultControllerFinishPromiseReject(controller: TransformStreamDefaultController, reason: any) {\n if (controller._finishPromise_reject === undefined) {\n return;\n }\n\n setPromiseIsHandledToTrue(controller._finishPromise!);\n controller._finishPromise_reject(reason);\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n}\n\n// Helper functions for the TransformStream.\n\nfunction streamBrandCheckException(name: string): TypeError {\n return new TypeError(\n 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\ No newline at end of file diff --git a/node_modules/web-streams-polyfill/dist/types/polyfill.d.ts b/node_modules/web-streams-polyfill/dist/types/polyfill.d.ts new file mode 100644 index 00000000..2d098357 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/types/polyfill.d.ts @@ -0,0 +1,24 @@ +/// +/// +import { ReadableStreamAsyncIterator, ReadableStreamIteratorOptions } from './ponyfill'; +export * from './ponyfill'; +declare global { + interface ReadableStream extends AsyncIterable { + /** + * Asynchronously iterates over the chunks in the stream's internal queue. + * + * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader. + * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method + * is called, e.g. by breaking out of the loop. + * + * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also + * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing + * `true` for the `preventCancel` option. + */ + values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator; + /** + * {@inheritDoc ReadableStream.values} + */ + [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator; + } +} diff --git a/node_modules/web-streams-polyfill/dist/types/ponyfill.d.ts b/node_modules/web-streams-polyfill/dist/types/ponyfill.d.ts new file mode 100644 index 00000000..d31068b8 --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/types/ponyfill.d.ts @@ -0,0 +1,780 @@ +/// +/** + * A signal object that allows you to communicate with a request and abort it if required + * via its associated `AbortController` object. + * + * @remarks + * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types. + * It is redefined here, so it can be polyfilled without a DOM, for example with + * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment. + * + * @public + */ +export declare interface AbortSignal { + /** + * Whether the request is aborted. + */ + readonly aborted: boolean; + /** + * If aborted, returns the reason for aborting. + */ + readonly reason?: any; + /** + * Add an event listener to be triggered when this signal becomes aborted. + */ + addEventListener(type: 'abort', listener: () => void): void; + /** + * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}. + */ + removeEventListener(type: 'abort', listener: () => void): void; +} +/** + * A queuing strategy that counts the number of bytes in each chunk. + * + * @public + */ +export declare class ByteLengthQueuingStrategy implements QueuingStrategy { + constructor(options: QueuingStrategyInit); + /* + * Returns the high water mark provided to the constructor. + */ + readonly highWaterMark: number; + /* + * Measures the size of `chunk` by returning the value of its `byteLength` property. + */ + readonly size: (chunk: ArrayBufferView) => number; +} +/** + * A queuing strategy that counts the number of chunks. + * + * @public + */ +export declare class CountQueuingStrategy implements QueuingStrategy { + constructor(options: QueuingStrategyInit); + /* + * Returns the high water mark provided to the constructor. + */ + readonly highWaterMark: number; + /* + * Measures the size of `chunk` by always returning 1. + * This ensures that the total queue size is a count of the number of chunks in the queue. + */ + readonly size: (chunk: any) => 1; +} +/** + * A queuing strategy. + * + * @public + */ +export declare interface QueuingStrategy { + /** + * A non-negative number indicating the high water mark of the stream using this queuing strategy. + */ + highWaterMark?: number; + /** + * A function that computes and returns the finite non-negative size of the given chunk value. + */ + size?: QueuingStrategySizeCallback; +} +/** + * @public + */ +export declare interface QueuingStrategyInit { + /** + * {@inheritDoc QueuingStrategy.highWaterMark} + */ + highWaterMark: number; +} +/** + * {@inheritDoc QueuingStrategy.size} + * @public + */ +export declare type QueuingStrategySizeCallback = (chunk: T) => number; +/** + * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue. + * + * @public + */ +export declare class ReadableByteStreamController { + private constructor(); + /* + * Returns the current BYOB pull request, or `null` if there isn't one. + */ + readonly byobRequest: ReadableStreamBYOBRequest | null; + /* + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure. + */ + readonly desiredSize: number | null; + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close(): void; + /** + * Enqueues the given chunk chunk in the controlled readable stream. + * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown. + */ + enqueue(chunk: ArrayBufferView): void; + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e?: any): void; +} +/** + * A readable stream represents a source of data, from which you can read. + * + * @public + */ +export declare class ReadableStream implements AsyncIterable { + constructor(underlyingSource: UnderlyingByteSource, strategy?: { + highWaterMark?: number; + size?: undefined; + }); + constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy); + /* + * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}. + */ + readonly locked: boolean; + /** + * Cancels the stream, signaling a loss of interest in the stream by a consumer. + * + * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()} + * method, which might or might not use it. + */ + cancel(reason?: any): Promise; + /** + * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader. + * + * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams, + * i.e. streams which were constructed specifically with the ability to handle "bring your own buffer" reading. + * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its + * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise + * control over allocation. + */ + getReader({ mode }: { + mode: 'byob'; + }): ReadableStreamBYOBReader; + /** + * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader. + * While the stream is locked, no other reader can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to consume a stream + * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours + * or cancel the stream, which would interfere with your abstraction. + */ + getReader(): ReadableStreamDefaultReader; + /** + * Provides a convenient, chainable way of piping this readable stream through a transform stream + * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream + * into the writable side of the supplied pair, and returns the readable side for further use. + * + * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader. + */ + pipeThrough(transform: { + readable: RS; + writable: WritableStream; + }, options?: StreamPipeOptions): RS; + /** + * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under + * various error conditions can be customized with a number of passed options. It returns a promise that fulfills + * when the piping process completes successfully, or rejects if any errors were encountered. + * + * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader. + */ + pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise; + /** + * Tees this readable stream, returning a two-element array containing the two resulting branches as + * new {@link ReadableStream} instances. + * + * Teeing a stream will lock it, preventing any other consumer from acquiring a reader. + * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be + * propagated to the stream's underlying source. + * + * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable, + * this could allow interference between the two branches. + */ + tee(): [ + ReadableStream, + ReadableStream + ]; + /** + * Asynchronously iterates over the chunks in the stream's internal queue. + * + * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader. + * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method + * is called, e.g. by breaking out of the loop. + * + * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also + * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing + * `true` for the `preventCancel` option. + */ + values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator; + /** + * {@inheritDoc ReadableStream.values} + */ + [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator; + /** + * Creates a new ReadableStream wrapping the provided iterable or async iterable. + * + * This can be used to adapt various kinds of objects into a readable stream, + * such as an array, an async generator, or a Node.js readable stream. + */ + static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream; +} +/** + * An async iterator returned by {@link ReadableStream.values}. + * + * @public + */ +export declare interface ReadableStreamAsyncIterator extends AsyncIterableIterator { + next(): Promise>; + return(value?: any): Promise>; +} +/** + * A BYOB reader vended by a {@link ReadableStream}. + * + * @public + */ +export declare class ReadableStreamBYOBReader { + constructor(stream: ReadableStream); + /* + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the reader's lock is released before the stream finishes closing. + */ + readonly closed: Promise; + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason?: any): Promise; + /** + * Attempts to reads bytes into view, and returns a promise resolved with the result. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + read(view: T, options?: ReadableStreamBYOBReaderReadOptions): Promise>; + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock(): void; +} +/** + * Options for {@link ReadableStreamBYOBReader.read | reading} a stream + * with a {@link ReadableStreamBYOBReader | BYOB reader}. + * + * @public + */ +export declare interface ReadableStreamBYOBReaderReadOptions { + min?: number; +} +/** + * A result returned by {@link ReadableStreamBYOBReader.read}. + * + * @public + */ +export declare type ReadableStreamBYOBReadResult = { + done: false; + value: T; +} | { + done: true; + value: T | undefined; +}; +/** + * A pull-into request in a {@link ReadableByteStreamController}. + * + * @public + */ +export declare class ReadableStreamBYOBRequest { + private constructor(); + /* + * Returns the view for writing in to, or `null` if the BYOB request has already been responded to. + */ + readonly view: ArrayBufferView | null; + /** + * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into + * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer. + * + * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer + * modifiable. + */ + respond(bytesWritten: number): void; + /** + * Indicates to the associated readable byte stream that instead of writing into + * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`, + * which will be given to the consumer of the readable byte stream. + * + * After this method is called, `view` will be transferred and no longer modifiable. + */ + respondWithNewView(view: ArrayBufferView): void; +} +/** + * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue. + * + * @public + */ +export declare class ReadableStreamDefaultController { + private constructor(); + /* + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying source ought to use this information to determine when and how to apply backpressure. + */ + readonly desiredSize: number | null; + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close(): void; + /** + * Enqueues the given chunk `chunk` in the controlled readable stream. + */ + enqueue(chunk: R): void; + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e?: any): void; +} +/** + * A default reader vended by a {@link ReadableStream}. + * + * @public + */ +export declare class ReadableStreamDefaultReader { + constructor(stream: ReadableStream); + /* + * Returns a promise that will be fulfilled when the stream becomes closed, + * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing. + */ + readonly closed: Promise; + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason?: any): Promise; + /** + * Returns a promise that allows access to the next chunk from the stream's internal queue, if available. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + read(): Promise>; + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock(): void; +} +/** + * A common interface for a `ReadableStreamDefaultReader` implementation. + * + * @public + */ +export declare interface ReadableStreamDefaultReaderLike { + readonly closed: Promise; + cancel(reason?: any): Promise; + read(): Promise>; + releaseLock(): void; +} +/** + * A result returned by {@link ReadableStreamDefaultReader.read}. + * + * @public + */ +export declare type ReadableStreamDefaultReadResult = { + done: false; + value: T; +} | { + done: true; + value?: undefined; +}; +/** + * Options for {@link ReadableStream.values | async iterating} a stream. + * + * @public + */ +export declare interface ReadableStreamIteratorOptions { + preventCancel?: boolean; +} +/** + * A common interface for a `ReadadableStream` implementation. + * + * @public + */ +export declare interface ReadableStreamLike { + readonly locked: boolean; + getReader(): ReadableStreamDefaultReaderLike; +} +/** + * A pair of a {@link ReadableStream | readable stream} and {@link WritableStream | writable stream} that can be passed + * to {@link ReadableStream.pipeThrough}. + * + * @public + */ +export declare interface ReadableWritablePair { + readable: ReadableStream; + writable: WritableStream; +} +/** + * Options for {@link ReadableStream.pipeTo | piping} a stream. + * + * @public + */ +export declare interface StreamPipeOptions { + /** + * If set to true, {@link ReadableStream.pipeTo} will not abort the writable stream if the readable stream errors. + */ + preventAbort?: boolean; + /** + * If set to true, {@link ReadableStream.pipeTo} will not cancel the readable stream if the writable stream closes + * or errors. + */ + preventCancel?: boolean; + /** + * If set to true, {@link ReadableStream.pipeTo} will not close the writable stream if the readable stream closes. + */ + preventClose?: boolean; + /** + * Can be set to an {@link AbortSignal} to allow aborting an ongoing pipe operation via the corresponding + * `AbortController`. In this case, the source readable stream will be canceled, and the destination writable stream + * aborted, unless the respective options `preventCancel` or `preventAbort` are set. + */ + signal?: AbortSignal; +} +/** + * A transformer for constructing a {@link TransformStream}. + * + * @public + */ +export declare interface Transformer { + /** + * A function that is called immediately during creation of the {@link TransformStream}. + */ + start?: TransformerStartCallback; + /** + * A function called when a new chunk originally written to the writable side is ready to be transformed. + */ + transform?: TransformerTransformCallback; + /** + * A function called after all chunks written to the writable side have been transformed by successfully passing + * through {@link Transformer.transform | transform()}, and the writable side is about to be closed. + */ + flush?: TransformerFlushCallback; + /** + * A function called when the readable side is cancelled, or when the writable side is aborted. + */ + cancel?: TransformerCancelCallback; + readableType?: undefined; + writableType?: undefined; +} +/** @public */ +export declare type TransformerCancelCallback = (reason: any) => void | PromiseLike; +/** @public */ +export declare type TransformerFlushCallback = (controller: TransformStreamDefaultController) => void | PromiseLike; +/** @public */ +export declare type TransformerStartCallback = (controller: TransformStreamDefaultController) => void | PromiseLike; +/** @public */ +export declare type TransformerTransformCallback = (chunk: I, controller: TransformStreamDefaultController) => void | PromiseLike; +/** + * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream}, + * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side. + * In a manner specific to the transform stream in question, writes to the writable side result in new data being + * made available for reading from the readable side. + * + * @public + */ +export declare class TransformStream { + constructor(transformer?: Transformer, writableStrategy?: QueuingStrategy, readableStrategy?: QueuingStrategy); + /* + * The readable side of the transform stream. + */ + readonly readable: ReadableStream; + /* + * The writable side of the transform stream. + */ + readonly writable: WritableStream; +} +/** + * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}. + * + * @public + */ +export declare class TransformStreamDefaultController { + private constructor(); + /* + * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full. + */ + readonly desiredSize: number | null; + /** + * Enqueues the given chunk `chunk` in the readable side of the controlled transform stream. + */ + enqueue(chunk: O): void; + /** + * Errors both the readable side and the writable side of the controlled transform stream, making all future + * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded. + */ + error(reason?: any): void; + /** + * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the + * transformer only needs to consume a portion of the chunks written to the writable side. + */ + terminate(): void; +} +/** + * An underlying byte source for constructing a {@link ReadableStream}. + * + * @public + */ +export declare interface UnderlyingByteSource { + /** + * {@inheritDoc UnderlyingSource.start} + */ + start?: UnderlyingByteSourceStartCallback; + /** + * {@inheritDoc UnderlyingSource.pull} + */ + pull?: UnderlyingByteSourcePullCallback; + /** + * {@inheritDoc UnderlyingSource.cancel} + */ + cancel?: UnderlyingSourceCancelCallback; + /** + * Can be set to "bytes" to signal that the constructed {@link ReadableStream} is a readable byte stream. + * This ensures that the resulting {@link ReadableStream} will successfully be able to vend BYOB readers via its + * {@link ReadableStream.(getReader:1) | getReader()} method. + * It also affects the controller argument passed to the {@link UnderlyingByteSource.start | start()} + * and {@link UnderlyingByteSource.pull | pull()} methods. + */ + type: 'bytes'; + /** + * Can be set to a positive integer to cause the implementation to automatically allocate buffers for the + * underlying source code to write into. In this case, when a consumer is using a default reader, the stream + * implementation will automatically allocate an ArrayBuffer of the given size, so that + * {@link ReadableByteStreamController.byobRequest | controller.byobRequest} is always present, + * as if the consumer was using a BYOB reader. + */ + autoAllocateChunkSize?: number; +} +/** @public */ +export declare type UnderlyingByteSourcePullCallback = (controller: ReadableByteStreamController) => void | PromiseLike; +/** @public */ +export declare type UnderlyingByteSourceStartCallback = (controller: ReadableByteStreamController) => void | PromiseLike; +/** + * An underlying sink for constructing a {@link WritableStream}. + * + * @public + */ +export declare interface UnderlyingSink { + /** + * A function that is called immediately during creation of the {@link WritableStream}. + */ + start?: UnderlyingSinkStartCallback; + /** + * A function that is called when a new chunk of data is ready to be written to the underlying sink. The stream + * implementation guarantees that this function will be called only after previous writes have succeeded, and never + * before {@link UnderlyingSink.start | start()} has succeeded or after {@link UnderlyingSink.close | close()} or + * {@link UnderlyingSink.abort | abort()} have been called. + * + * This function is used to actually send the data to the resource presented by the underlying sink, for example by + * calling a lower-level API. + */ + write?: UnderlyingSinkWriteCallback; + /** + * A function that is called after the producer signals, via + * {@link WritableStreamDefaultWriter.close | writer.close()}, that they are done writing chunks to the stream, and + * subsequently all queued-up writes have successfully completed. + * + * This function can perform any actions necessary to finalize or flush writes to the underlying sink, and release + * access to any held resources. + */ + close?: UnderlyingSinkCloseCallback; + /** + * A function that is called after the producer signals, via {@link WritableStream.abort | stream.abort()} or + * {@link WritableStreamDefaultWriter.abort | writer.abort()}, that they wish to abort the stream. It takes as its + * argument the same value as was passed to those methods by the producer. + * + * Writable streams can additionally be aborted under certain conditions during piping; see the definition of the + * {@link ReadableStream.pipeTo | pipeTo()} method for more details. + * + * This function can clean up any held resources, much like {@link UnderlyingSink.close | close()}, but perhaps with + * some custom handling. + */ + abort?: UnderlyingSinkAbortCallback; + type?: undefined; +} +/** @public */ +export declare type UnderlyingSinkAbortCallback = (reason: any) => void | PromiseLike; +/** @public */ +export declare type UnderlyingSinkCloseCallback = () => void | PromiseLike; +/** @public */ +export declare type UnderlyingSinkStartCallback = (controller: WritableStreamDefaultController) => void | PromiseLike; +/** @public */ +export declare type UnderlyingSinkWriteCallback = (chunk: W, controller: WritableStreamDefaultController) => void | PromiseLike; +/** + * An underlying source for constructing a {@link ReadableStream}. + * + * @public + */ +export declare interface UnderlyingSource { + /** + * A function that is called immediately during creation of the {@link ReadableStream}. + */ + start?: UnderlyingSourceStartCallback; + /** + * A function that is called whenever the stream’s internal queue of chunks becomes not full, + * i.e. whenever the queue’s desired size becomes positive. Generally, it will be called repeatedly + * until the queue reaches its high water mark (i.e. until the desired size becomes non-positive). + */ + pull?: UnderlyingSourcePullCallback; + /** + * A function that is called whenever the consumer cancels the stream, via + * {@link ReadableStream.cancel | stream.cancel()}, + * {@link ReadableStreamDefaultReader.cancel | defaultReader.cancel()}, or + * {@link ReadableStreamBYOBReader.cancel | byobReader.cancel()}. + * It takes as its argument the same value as was passed to those methods by the consumer. + */ + cancel?: UnderlyingSourceCancelCallback; + type?: undefined; +} +/** @public */ +export declare type UnderlyingSourceCancelCallback = (reason: any) => void | PromiseLike; +/** @public */ +export declare type UnderlyingSourcePullCallback = (controller: ReadableStreamDefaultController) => void | PromiseLike; +/** @public */ +export declare type UnderlyingSourceStartCallback = (controller: ReadableStreamDefaultController) => void | PromiseLike; +/** + * A writable stream represents a destination for data, into which you can write. + * + * @public + */ +export declare class WritableStream { + constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy); + /* + * Returns whether or not the writable stream is locked to a writer. + */ + readonly locked: boolean; + /** + * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be + * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort + * mechanism of the underlying sink. + * + * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled + * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel + * the stream) if the stream is currently locked. + */ + abort(reason?: any): Promise; + /** + * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its + * close behavior. During this time any further attempts to write will fail (without erroring the stream). + * + * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream + * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with + * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked. + */ + close(): Promise; + /** + * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream + * is locked, no other writer can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to write to a stream + * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at + * the same time, which would cause the resulting written data to be unpredictable and probably useless. + */ + getWriter(): WritableStreamDefaultWriter; +} +/** + * Allows control of a {@link WritableStream | writable stream}'s state and internal queue. + * + * @public + */ +export declare class WritableStreamDefaultController { + private constructor(); + /* + * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted. + * + * @deprecated + * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177. + * Use {@link WritableStreamDefaultController.signal}'s `reason` instead. + */ + readonly abortReason: any; + /* + * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted. + */ + readonly signal: AbortSignal; + /** + * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`. + * + * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying + * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the + * normal lifecycle of interactions with the underlying sink. + */ + error(e?: any): void; +} +/** + * A default writer vended by a {@link WritableStream}. + * + * @public + */ +export declare class WritableStreamDefaultWriter { + constructor(stream: WritableStream); + /* + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the writer’s lock is released before the stream finishes closing. + */ + readonly closed: Promise; + /* + * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full. + * A producer can use this information to determine the right amount of data to write. + * + * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort + * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when + * the writer’s lock is released. + */ + readonly desiredSize: number | null; + /* + * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions + * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips + * back to zero or below, the getter will return a new promise that stays pending until the next transition. + * + * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become + * rejected. + */ + readonly ready: Promise; + /** + * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}. + */ + abort(reason?: any): Promise; + /** + * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}. + */ + close(): Promise; + /** + * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active. + * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from + * now on; otherwise, the writer will appear closed. + * + * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the + * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled). + * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents + * other producers from writing in an interleaved manner. + */ + releaseLock(): void; + /** + * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully, + * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return + * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes + * errored before the writing process is initiated. + * + * Note that what "success" means is up to the underlying sink; it might indicate simply that the chunk has been + * accepted, and not necessarily that it is safely saved to its ultimate destination. + */ + write(chunk: W): Promise; +} +export {}; diff --git a/node_modules/web-streams-polyfill/dist/types/ts3.6/polyfill.d.ts b/node_modules/web-streams-polyfill/dist/types/ts3.6/polyfill.d.ts new file mode 100644 index 00000000..1e24288d --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/types/ts3.6/polyfill.d.ts @@ -0,0 +1,28 @@ +/// +/// + +import type { ReadableStreamAsyncIterator, ReadableStreamIteratorOptions } from './ponyfill'; + +export * from './ponyfill'; + +declare global { + interface ReadableStream extends AsyncIterable { + /** + * Asynchronously iterates over the chunks in the stream's internal queue. + * + * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader. + * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method + * is called, e.g. by breaking out of the loop. + * + * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also + * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing + * `true` for the `preventCancel` option. + */ + values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator; + + /** + * {@inheritDoc ReadableStream.values} + */ + [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator; + } +} diff --git a/node_modules/web-streams-polyfill/dist/types/ts3.6/ponyfill.d.ts b/node_modules/web-streams-polyfill/dist/types/ts3.6/ponyfill.d.ts new file mode 100644 index 00000000..b1fd4aec --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/types/ts3.6/ponyfill.d.ts @@ -0,0 +1,821 @@ +/// + +/** + * A signal object that allows you to communicate with a request and abort it if required + * via its associated `AbortController` object. + * + * @remarks + * This interface is compatible with the `AbortSignal` interface defined in TypeScript's DOM types. + * It is redefined here, so it can be polyfilled without a DOM, for example with + * {@link https://www.npmjs.com/package/abortcontroller-polyfill | abortcontroller-polyfill} in a Node environment. + * + * @public + */ +export declare interface AbortSignal { + /** + * Whether the request is aborted. + */ + readonly aborted: boolean; + /** + * If aborted, returns the reason for aborting. + */ + readonly reason?: any; + /** + * Add an event listener to be triggered when this signal becomes aborted. + */ + addEventListener(type: 'abort', listener: () => void): void; + /** + * Remove an event listener that was previously added with {@link AbortSignal.addEventListener}. + */ + removeEventListener(type: 'abort', listener: () => void): void; +} + +/** + * A queuing strategy that counts the number of bytes in each chunk. + * + * @public + */ +export declare class ByteLengthQueuingStrategy implements QueuingStrategy { + constructor(options: QueuingStrategyInit); + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark(): number; + /** + * Measures the size of `chunk` by returning the value of its `byteLength` property. + */ + get size(): (chunk: ArrayBufferView) => number; +} + +/** + * A queuing strategy that counts the number of chunks. + * + * @public + */ +export declare class CountQueuingStrategy implements QueuingStrategy { + constructor(options: QueuingStrategyInit); + /** + * Returns the high water mark provided to the constructor. + */ + get highWaterMark(): number; + /** + * Measures the size of `chunk` by always returning 1. + * This ensures that the total queue size is a count of the number of chunks in the queue. + */ + get size(): (chunk: any) => 1; +} + +/** + * A queuing strategy. + * + * @public + */ +export declare interface QueuingStrategy { + /** + * A non-negative number indicating the high water mark of the stream using this queuing strategy. + */ + highWaterMark?: number; + /** + * A function that computes and returns the finite non-negative size of the given chunk value. + */ + size?: QueuingStrategySizeCallback; +} + +/** + * @public + */ +export declare interface QueuingStrategyInit { + /** + * {@inheritDoc QueuingStrategy.highWaterMark} + */ + highWaterMark: number; +} + +/** + * {@inheritDoc QueuingStrategy.size} + * @public + */ +export declare type QueuingStrategySizeCallback = (chunk: T) => number; + +/** + * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue. + * + * @public + */ +export declare class ReadableByteStreamController { + private constructor(); + /** + * Returns the current BYOB pull request, or `null` if there isn't one. + */ + get byobRequest(): ReadableStreamBYOBRequest | null; + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize(): number | null; + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close(): void; + /** + * Enqueues the given chunk chunk in the controlled readable stream. + * The chunk has to be an `ArrayBufferView` instance, or else a `TypeError` will be thrown. + */ + enqueue(chunk: ArrayBufferView): void; + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e?: any): void; +} + +/** + * A readable stream represents a source of data, from which you can read. + * + * @public + */ +export declare class ReadableStream implements AsyncIterable { + constructor(underlyingSource: UnderlyingByteSource, strategy?: { + highWaterMark?: number; + size?: undefined; + }); + constructor(underlyingSource?: UnderlyingSource, strategy?: QueuingStrategy); + /** + * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}. + */ + get locked(): boolean; + /** + * Cancels the stream, signaling a loss of interest in the stream by a consumer. + * + * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()} + * method, which might or might not use it. + */ + cancel(reason?: any): Promise; + /** + * Creates a {@link ReadableStreamBYOBReader} and locks the stream to the new reader. + * + * This call behaves the same way as the no-argument variant, except that it only works on readable byte streams, + * i.e. streams which were constructed specifically with the ability to handle "bring your own buffer" reading. + * The returned BYOB reader provides the ability to directly read individual chunks from the stream via its + * {@link ReadableStreamBYOBReader.read | read()} method, into developer-supplied buffers, allowing more precise + * control over allocation. + */ + getReader({ mode }: { + mode: 'byob'; + }): ReadableStreamBYOBReader; + /** + * Creates a {@link ReadableStreamDefaultReader} and locks the stream to the new reader. + * While the stream is locked, no other reader can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to consume a stream + * in its entirety. By getting a reader for the stream, you can ensure nobody else can interleave reads with yours + * or cancel the stream, which would interfere with your abstraction. + */ + getReader(): ReadableStreamDefaultReader; + /** + * Provides a convenient, chainable way of piping this readable stream through a transform stream + * (or any other `{ writable, readable }` pair). It simply {@link ReadableStream.pipeTo | pipes} the stream + * into the writable side of the supplied pair, and returns the readable side for further use. + * + * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader. + */ + pipeThrough(transform: { + readable: RS; + writable: WritableStream; + }, options?: StreamPipeOptions): RS; + /** + * Pipes this readable stream to a given writable stream. The way in which the piping process behaves under + * various error conditions can be customized with a number of passed options. It returns a promise that fulfills + * when the piping process completes successfully, or rejects if any errors were encountered. + * + * Piping a stream will lock it for the duration of the pipe, preventing any other consumer from acquiring a reader. + */ + pipeTo(destination: WritableStream, options?: StreamPipeOptions): Promise; + /** + * Tees this readable stream, returning a two-element array containing the two resulting branches as + * new {@link ReadableStream} instances. + * + * Teeing a stream will lock it, preventing any other consumer from acquiring a reader. + * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be + * propagated to the stream's underlying source. + * + * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable, + * this could allow interference between the two branches. + */ + tee(): [ReadableStream, ReadableStream]; + /** + * Asynchronously iterates over the chunks in the stream's internal queue. + * + * Asynchronously iterating over the stream will lock it, preventing any other consumer from acquiring a reader. + * The lock will be released if the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method + * is called, e.g. by breaking out of the loop. + * + * By default, calling the async iterator's {@link ReadableStreamAsyncIterator.return | return()} method will also + * cancel the stream. To prevent this, use the stream's {@link ReadableStream.values | values()} method, passing + * `true` for the `preventCancel` option. + */ + values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator; + /** + * {@inheritDoc ReadableStream.values} + */ + [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator; + /** + * Creates a new ReadableStream wrapping the provided iterable or async iterable. + * + * This can be used to adapt various kinds of objects into a readable stream, + * such as an array, an async generator, or a Node.js readable stream. + */ + static from(asyncIterable: Iterable | AsyncIterable | ReadableStreamLike): ReadableStream; +} + +/** + * An async iterator returned by {@link ReadableStream.values}. + * + * @public + */ +export declare interface ReadableStreamAsyncIterator extends AsyncIterableIterator { + next(): Promise>; + return(value?: any): Promise>; +} + +/** + * A BYOB reader vended by a {@link ReadableStream}. + * + * @public + */ +export declare class ReadableStreamBYOBReader { + constructor(stream: ReadableStream); + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the reader's lock is released before the stream finishes closing. + */ + get closed(): Promise; + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason?: any): Promise; + /** + * Attempts to reads bytes into view, and returns a promise resolved with the result. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + read(view: T, options?: ReadableStreamBYOBReaderReadOptions): Promise>; + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock(): void; +} + +/** + * Options for {@link ReadableStreamBYOBReader.read | reading} a stream + * with a {@link ReadableStreamBYOBReader | BYOB reader}. + * + * @public + */ +export declare interface ReadableStreamBYOBReaderReadOptions { + min?: number; +} + +/** + * A result returned by {@link ReadableStreamBYOBReader.read}. + * + * @public + */ +export declare type ReadableStreamBYOBReadResult = { + done: false; + value: T; +} | { + done: true; + value: T | undefined; +}; + +/** + * A pull-into request in a {@link ReadableByteStreamController}. + * + * @public + */ +export declare class ReadableStreamBYOBRequest { + private constructor(); + /** + * Returns the view for writing in to, or `null` if the BYOB request has already been responded to. + */ + get view(): ArrayBufferView | null; + /** + * Indicates to the associated readable byte stream that `bytesWritten` bytes were written into + * {@link ReadableStreamBYOBRequest.view | view}, causing the result be surfaced to the consumer. + * + * After this method is called, {@link ReadableStreamBYOBRequest.view | view} will be transferred and no longer + * modifiable. + */ + respond(bytesWritten: number): void; + /** + * Indicates to the associated readable byte stream that instead of writing into + * {@link ReadableStreamBYOBRequest.view | view}, the underlying byte source is providing a new `ArrayBufferView`, + * which will be given to the consumer of the readable byte stream. + * + * After this method is called, `view` will be transferred and no longer modifiable. + */ + respondWithNewView(view: ArrayBufferView): void; +} + +/** + * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue. + * + * @public + */ +export declare class ReadableStreamDefaultController { + private constructor(); + /** + * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is + * over-full. An underlying source ought to use this information to determine when and how to apply backpressure. + */ + get desiredSize(): number | null; + /** + * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from + * the stream, but once those are read, the stream will become closed. + */ + close(): void; + /** + * Enqueues the given chunk `chunk` in the controlled readable stream. + */ + enqueue(chunk: R): void; + /** + * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`. + */ + error(e?: any): void; +} + +/** + * A default reader vended by a {@link ReadableStream}. + * + * @public + */ +export declare class ReadableStreamDefaultReader { + constructor(stream: ReadableStream); + /** + * Returns a promise that will be fulfilled when the stream becomes closed, + * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing. + */ + get closed(): Promise; + /** + * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}. + */ + cancel(reason?: any): Promise; + /** + * Returns a promise that allows access to the next chunk from the stream's internal queue, if available. + * + * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source. + */ + read(): Promise>; + /** + * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active. + * If the associated stream is errored when the lock is released, the reader will appear errored in the same way + * from now on; otherwise, the reader will appear closed. + * + * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by + * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to + * do so will throw a `TypeError` and leave the reader locked to the stream. + */ + releaseLock(): void; +} + +/** + * A common interface for a `ReadableStreamDefaultReader` implementation. + * + * @public + */ +export declare interface ReadableStreamDefaultReaderLike { + readonly closed: Promise; + cancel(reason?: any): Promise; + read(): Promise>; + releaseLock(): void; +} + +/** + * A result returned by {@link ReadableStreamDefaultReader.read}. + * + * @public + */ +export declare type ReadableStreamDefaultReadResult = { + done: false; + value: T; +} | { + done: true; + value?: undefined; +}; + +/** + * Options for {@link ReadableStream.values | async iterating} a stream. + * + * @public + */ +export declare interface ReadableStreamIteratorOptions { + preventCancel?: boolean; +} + +/** + * A common interface for a `ReadadableStream` implementation. + * + * @public + */ +export declare interface ReadableStreamLike { + readonly locked: boolean; + getReader(): ReadableStreamDefaultReaderLike; +} + +/** + * A pair of a {@link ReadableStream | readable stream} and {@link WritableStream | writable stream} that can be passed + * to {@link ReadableStream.pipeThrough}. + * + * @public + */ +export declare interface ReadableWritablePair { + readable: ReadableStream; + writable: WritableStream; +} + +/** + * Options for {@link ReadableStream.pipeTo | piping} a stream. + * + * @public + */ +export declare interface StreamPipeOptions { + /** + * If set to true, {@link ReadableStream.pipeTo} will not abort the writable stream if the readable stream errors. + */ + preventAbort?: boolean; + /** + * If set to true, {@link ReadableStream.pipeTo} will not cancel the readable stream if the writable stream closes + * or errors. + */ + preventCancel?: boolean; + /** + * If set to true, {@link ReadableStream.pipeTo} will not close the writable stream if the readable stream closes. + */ + preventClose?: boolean; + /** + * Can be set to an {@link AbortSignal} to allow aborting an ongoing pipe operation via the corresponding + * `AbortController`. In this case, the source readable stream will be canceled, and the destination writable stream + * aborted, unless the respective options `preventCancel` or `preventAbort` are set. + */ + signal?: AbortSignal; +} + +/** + * A transformer for constructing a {@link TransformStream}. + * + * @public + */ +export declare interface Transformer { + /** + * A function that is called immediately during creation of the {@link TransformStream}. + */ + start?: TransformerStartCallback; + /** + * A function called when a new chunk originally written to the writable side is ready to be transformed. + */ + transform?: TransformerTransformCallback; + /** + * A function called after all chunks written to the writable side have been transformed by successfully passing + * through {@link Transformer.transform | transform()}, and the writable side is about to be closed. + */ + flush?: TransformerFlushCallback; + /** + * A function called when the readable side is cancelled, or when the writable side is aborted. + */ + cancel?: TransformerCancelCallback; + readableType?: undefined; + writableType?: undefined; +} + +/** @public */ +export declare type TransformerCancelCallback = (reason: any) => void | PromiseLike; + +/** @public */ +export declare type TransformerFlushCallback = (controller: TransformStreamDefaultController) => void | PromiseLike; + +/** @public */ +export declare type TransformerStartCallback = (controller: TransformStreamDefaultController) => void | PromiseLike; + +/** @public */ +export declare type TransformerTransformCallback = (chunk: I, controller: TransformStreamDefaultController) => void | PromiseLike; + +/** + * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream}, + * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side. + * In a manner specific to the transform stream in question, writes to the writable side result in new data being + * made available for reading from the readable side. + * + * @public + */ +export declare class TransformStream { + constructor(transformer?: Transformer, writableStrategy?: QueuingStrategy, readableStrategy?: QueuingStrategy); + /** + * The readable side of the transform stream. + */ + get readable(): ReadableStream; + /** + * The writable side of the transform stream. + */ + get writable(): WritableStream; +} + +/** + * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}. + * + * @public + */ +export declare class TransformStreamDefaultController { + private constructor(); + /** + * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full. + */ + get desiredSize(): number | null; + /** + * Enqueues the given chunk `chunk` in the readable side of the controlled transform stream. + */ + enqueue(chunk: O): void; + /** + * Errors both the readable side and the writable side of the controlled transform stream, making all future + * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded. + */ + error(reason?: any): void; + /** + * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the + * transformer only needs to consume a portion of the chunks written to the writable side. + */ + terminate(): void; +} + +/** + * An underlying byte source for constructing a {@link ReadableStream}. + * + * @public + */ +export declare interface UnderlyingByteSource { + /** + * {@inheritDoc UnderlyingSource.start} + */ + start?: UnderlyingByteSourceStartCallback; + /** + * {@inheritDoc UnderlyingSource.pull} + */ + pull?: UnderlyingByteSourcePullCallback; + /** + * {@inheritDoc UnderlyingSource.cancel} + */ + cancel?: UnderlyingSourceCancelCallback; + /** + * Can be set to "bytes" to signal that the constructed {@link ReadableStream} is a readable byte stream. + * This ensures that the resulting {@link ReadableStream} will successfully be able to vend BYOB readers via its + * {@link ReadableStream.(getReader:1) | getReader()} method. + * It also affects the controller argument passed to the {@link UnderlyingByteSource.start | start()} + * and {@link UnderlyingByteSource.pull | pull()} methods. + */ + type: 'bytes'; + /** + * Can be set to a positive integer to cause the implementation to automatically allocate buffers for the + * underlying source code to write into. In this case, when a consumer is using a default reader, the stream + * implementation will automatically allocate an ArrayBuffer of the given size, so that + * {@link ReadableByteStreamController.byobRequest | controller.byobRequest} is always present, + * as if the consumer was using a BYOB reader. + */ + autoAllocateChunkSize?: number; +} + +/** @public */ +export declare type UnderlyingByteSourcePullCallback = (controller: ReadableByteStreamController) => void | PromiseLike; + +/** @public */ +export declare type UnderlyingByteSourceStartCallback = (controller: ReadableByteStreamController) => void | PromiseLike; + +/** + * An underlying sink for constructing a {@link WritableStream}. + * + * @public + */ +export declare interface UnderlyingSink { + /** + * A function that is called immediately during creation of the {@link WritableStream}. + */ + start?: UnderlyingSinkStartCallback; + /** + * A function that is called when a new chunk of data is ready to be written to the underlying sink. The stream + * implementation guarantees that this function will be called only after previous writes have succeeded, and never + * before {@link UnderlyingSink.start | start()} has succeeded or after {@link UnderlyingSink.close | close()} or + * {@link UnderlyingSink.abort | abort()} have been called. + * + * This function is used to actually send the data to the resource presented by the underlying sink, for example by + * calling a lower-level API. + */ + write?: UnderlyingSinkWriteCallback; + /** + * A function that is called after the producer signals, via + * {@link WritableStreamDefaultWriter.close | writer.close()}, that they are done writing chunks to the stream, and + * subsequently all queued-up writes have successfully completed. + * + * This function can perform any actions necessary to finalize or flush writes to the underlying sink, and release + * access to any held resources. + */ + close?: UnderlyingSinkCloseCallback; + /** + * A function that is called after the producer signals, via {@link WritableStream.abort | stream.abort()} or + * {@link WritableStreamDefaultWriter.abort | writer.abort()}, that they wish to abort the stream. It takes as its + * argument the same value as was passed to those methods by the producer. + * + * Writable streams can additionally be aborted under certain conditions during piping; see the definition of the + * {@link ReadableStream.pipeTo | pipeTo()} method for more details. + * + * This function can clean up any held resources, much like {@link UnderlyingSink.close | close()}, but perhaps with + * some custom handling. + */ + abort?: UnderlyingSinkAbortCallback; + type?: undefined; +} + +/** @public */ +export declare type UnderlyingSinkAbortCallback = (reason: any) => void | PromiseLike; + +/** @public */ +export declare type UnderlyingSinkCloseCallback = () => void | PromiseLike; + +/** @public */ +export declare type UnderlyingSinkStartCallback = (controller: WritableStreamDefaultController) => void | PromiseLike; + +/** @public */ +export declare type UnderlyingSinkWriteCallback = (chunk: W, controller: WritableStreamDefaultController) => void | PromiseLike; + +/** + * An underlying source for constructing a {@link ReadableStream}. + * + * @public + */ +export declare interface UnderlyingSource { + /** + * A function that is called immediately during creation of the {@link ReadableStream}. + */ + start?: UnderlyingSourceStartCallback; + /** + * A function that is called whenever the stream’s internal queue of chunks becomes not full, + * i.e. whenever the queue’s desired size becomes positive. Generally, it will be called repeatedly + * until the queue reaches its high water mark (i.e. until the desired size becomes non-positive). + */ + pull?: UnderlyingSourcePullCallback; + /** + * A function that is called whenever the consumer cancels the stream, via + * {@link ReadableStream.cancel | stream.cancel()}, + * {@link ReadableStreamDefaultReader.cancel | defaultReader.cancel()}, or + * {@link ReadableStreamBYOBReader.cancel | byobReader.cancel()}. + * It takes as its argument the same value as was passed to those methods by the consumer. + */ + cancel?: UnderlyingSourceCancelCallback; + type?: undefined; +} + +/** @public */ +export declare type UnderlyingSourceCancelCallback = (reason: any) => void | PromiseLike; + +/** @public */ +export declare type UnderlyingSourcePullCallback = (controller: ReadableStreamDefaultController) => void | PromiseLike; + +/** @public */ +export declare type UnderlyingSourceStartCallback = (controller: ReadableStreamDefaultController) => void | PromiseLike; + +/** + * A writable stream represents a destination for data, into which you can write. + * + * @public + */ +export declare class WritableStream { + constructor(underlyingSink?: UnderlyingSink, strategy?: QueuingStrategy); + /** + * Returns whether or not the writable stream is locked to a writer. + */ + get locked(): boolean; + /** + * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be + * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort + * mechanism of the underlying sink. + * + * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled + * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel + * the stream) if the stream is currently locked. + */ + abort(reason?: any): Promise; + /** + * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its + * close behavior. During this time any further attempts to write will fail (without erroring the stream). + * + * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream + * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with + * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked. + */ + close(): Promise; + /** + * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream + * is locked, no other writer can be acquired until this one is released. + * + * This functionality is especially useful for creating abstractions that desire the ability to write to a stream + * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at + * the same time, which would cause the resulting written data to be unpredictable and probably useless. + */ + getWriter(): WritableStreamDefaultWriter; +} + +/** + * Allows control of a {@link WritableStream | writable stream}'s state and internal queue. + * + * @public + */ +export declare class WritableStreamDefaultController { + private constructor(); + /** + * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted. + * + * @deprecated + * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177. + * Use {@link WritableStreamDefaultController.signal}'s `reason` instead. + */ + get abortReason(): any; + /** + * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted. + */ + get signal(): AbortSignal; + /** + * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`. + * + * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying + * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the + * normal lifecycle of interactions with the underlying sink. + */ + error(e?: any): void; +} + +/** + * A default writer vended by a {@link WritableStream}. + * + * @public + */ +export declare class WritableStreamDefaultWriter { + constructor(stream: WritableStream); + /** + * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or + * the writer’s lock is released before the stream finishes closing. + */ + get closed(): Promise; + /** + * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full. + * A producer can use this information to determine the right amount of data to write. + * + * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort + * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when + * the writer’s lock is released. + */ + get desiredSize(): number | null; + /** + * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions + * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips + * back to zero or below, the getter will return a new promise that stays pending until the next transition. + * + * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become + * rejected. + */ + get ready(): Promise; + /** + * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}. + */ + abort(reason?: any): Promise; + /** + * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}. + */ + close(): Promise; + /** + * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active. + * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from + * now on; otherwise, the writer will appear closed. + * + * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the + * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled). + * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents + * other producers from writing in an interleaved manner. + */ + releaseLock(): void; + /** + * Writes the given chunk to the writable stream, by waiting until any previous writes have finished successfully, + * and then sending the chunk to the underlying sink's {@link UnderlyingSink.write | write()} method. It will return + * a promise that fulfills with undefined upon a successful write, or rejects if the write fails or stream becomes + * errored before the writing process is initiated. + * + * Note that what "success" means is up to the underlying sink; it might indicate simply that the chunk has been + * accepted, and not necessarily that it is safely saved to its ultimate destination. + */ + write(chunk: W): Promise; +} + +export { } diff --git a/node_modules/web-streams-polyfill/dist/types/tsdoc-metadata.json b/node_modules/web-streams-polyfill/dist/types/tsdoc-metadata.json new file mode 100644 index 00000000..b18fd2ae --- /dev/null +++ b/node_modules/web-streams-polyfill/dist/types/tsdoc-metadata.json @@ -0,0 +1,11 @@ +// This file is read by tools that parse documentation comments conforming to the TSDoc standard. +// It should be published with your NPM package. It should not be tracked by Git. +{ + "tsdocVersion": "0.12", + "toolPackages": [ + { + "packageName": "@microsoft/api-extractor", + "packageVersion": "7.39.1" + } + ] +} diff --git a/node_modules/web-streams-polyfill/es2018/package.json b/node_modules/web-streams-polyfill/es2018/package.json new file mode 100644 index 00000000..97f8fb1b --- /dev/null +++ b/node_modules/web-streams-polyfill/es2018/package.json @@ -0,0 +1,14 @@ +{ + "name": "web-streams-polyfill-es2018", + "main": "../dist/polyfill.es2018", + "browser": "../dist/polyfill.es2018.min.js", + "module": "../dist/polyfill.es2018.mjs", + "types": "../dist/types/polyfill.d.ts", + "typesVersions": { + ">=3.6": { + "../dist/types/*": [ + "../dist/types/ts3.6/*" + ] + } + } +} diff --git a/node_modules/web-streams-polyfill/es6/package.json b/node_modules/web-streams-polyfill/es6/package.json new file mode 100644 index 00000000..ca3909bc --- /dev/null +++ b/node_modules/web-streams-polyfill/es6/package.json @@ -0,0 +1,14 @@ +{ + "name": "web-streams-polyfill-es6", + "main": "../dist/polyfill.es6", + "browser": "../dist/polyfill.es6.min.js", + "module": "../dist/polyfill.es6.mjs", + "types": "../dist/types/polyfill.d.ts", + "typesVersions": { + ">=3.6": { + "../dist/types/*": [ + "../dist/types/ts3.6/*" + ] + } + } +} diff --git a/node_modules/web-streams-polyfill/package.json b/node_modules/web-streams-polyfill/package.json new file mode 100644 index 00000000..fa7d1648 --- /dev/null +++ b/node_modules/web-streams-polyfill/package.json @@ -0,0 +1,83 @@ +{ + "name": "web-streams-polyfill", + "version": "3.3.3", + "description": "Web Streams, based on the WHATWG spec reference implementation", + "main": "dist/polyfill", + "browser": "dist/polyfill.min.js", + "module": "dist/polyfill.mjs", + "types": "dist/types/polyfill.d.ts", + "typesVersions": { + ">=3.6": { + "dist/types/*": [ + "dist/types/ts3.6/*" + ] + } + }, + "scripts": { + "test": "npm run test:types && npm run test:unit && npm run test:wpt", + "test:wpt": "npm run test:wpt:node && npm run test:wpt:chromium && npm run test:wpt:firefox", + "test:wpt:node": "node --expose_gc ./test/wpt/node/run.js", + "test:wpt:chromium": "node ./test/wpt/browser/run.js --browser chromium", + "test:wpt:firefox": "node ./test/wpt/browser/run.js --browser firefox", + "test:types": "tsc -p ./test/types/tsconfig.json", + "test:unit": "jasmine --config=test/unit/jasmine.json", + "lint": "eslint \"src/**/*.ts\"", + "build": "npm run build:bundle && npm run build:types", + "build:bundle": "rollup -c", + "build:types": "tsc --project . --emitDeclarationOnly --declarationDir ./lib && api-extractor run", + "accept:types": "npm run build:types -- --local", + "postbuild:types": "downlevel-dts ./dist/types/ts3.6/ ./dist/types/ --to=3.5 && node ./build/downlevel-dts.js", + "prepare": "npm run build" + }, + "files": [ + "dist", + "es6", + "es2018", + "ponyfill" + ], + "engines": { + "node": ">= 8" + }, + "repository": { + "type": "git", + "url": "git+https://github.com/MattiasBuelens/web-streams-polyfill.git" + }, + "keywords": [ + "streams", + "whatwg", + "polyfill" + ], + "author": "Mattias Buelens ", + "contributors": [ + "Diwank Singh " + ], + "license": "MIT", + "bugs": { + "url": "https://github.com/MattiasBuelens/web-streams-polyfill/issues" + }, + "homepage": "https://github.com/MattiasBuelens/web-streams-polyfill#readme", + "devDependencies": { + "@microsoft/api-extractor": "^7.39.1", + "@rollup/plugin-inject": "^5.0.5", + "@rollup/plugin-replace": "^5.0.5", + "@rollup/plugin-strip": "^3.0.4", + "@rollup/plugin-terser": "^0.4.4", + "@rollup/plugin-typescript": "^11.1.5", + "@types/node": "^18.19.4", + "@typescript-eslint/eslint-plugin": "^6.17.0", + "@typescript-eslint/parser": "^6.17.0", + "@ungap/promise-all-settled": "^1.1.2", + "downlevel-dts": "^0.11.0", + "eslint": "^8.56.0", + "jasmine": "^5.1.0", + "micromatch": "^4.0.5", + "minimist": "^1.2.5", + "playwright": "^1.14.1", + "recursive-readdir": "^2.2.2", + "rollup": "^4.9.2", + "ts-morph": "^10.0.2", + "tslib": "^2.6.2", + "typescript": "^5.3.3", + "wpt-runner": "^5.0.0" + } +} diff --git a/node_modules/web-streams-polyfill/ponyfill/es2018/package.json b/node_modules/web-streams-polyfill/ponyfill/es2018/package.json new file mode 100644 index 00000000..26816ac9 --- /dev/null +++ b/node_modules/web-streams-polyfill/ponyfill/es2018/package.json @@ -0,0 +1,13 @@ +{ + "name": "web-streams-ponyfill-es2018", + "main": "../../dist/ponyfill.es2018", + "module": "../../dist/ponyfill.es2018.mjs", + "types": "../../dist/types/ponyfill.d.ts", + "typesVersions": { + ">=3.6": { + "../../dist/types/*": [ + "../../dist/types/ts3.6/*" + ] + } + } +} diff --git a/node_modules/web-streams-polyfill/ponyfill/es6/package.json b/node_modules/web-streams-polyfill/ponyfill/es6/package.json new file mode 100644 index 00000000..b54520da --- /dev/null +++ b/node_modules/web-streams-polyfill/ponyfill/es6/package.json @@ -0,0 +1,13 @@ +{ + "name": "web-streams-ponyfill-es6", + "main": "../../dist/ponyfill.es6", + "module": "../../dist/ponyfill.es6.mjs", + "types": "../../dist/types/ponyfill.d.ts", + "typesVersions": { + ">=3.6": { + "../../dist/types/*": [ + "../../dist/types/ts3.6/*" + ] + } + } +} diff --git a/node_modules/web-streams-polyfill/ponyfill/package.json b/node_modules/web-streams-polyfill/ponyfill/package.json new file mode 100644 index 00000000..36e9fbe4 --- /dev/null +++ b/node_modules/web-streams-polyfill/ponyfill/package.json @@ -0,0 +1,13 @@ +{ + "name": "web-streams-ponyfill", + "main": "../dist/ponyfill", + "module": "../dist/ponyfill.mjs", + "types": "../dist/types/ponyfill.d.ts", + "typesVersions": { + ">=3.6": { + "../dist/types/*": [ + "../dist/types/ts3.6/*" + ] + } + } +} diff --git a/node_modules/webdav/CHANGELOG.md b/node_modules/webdav/CHANGELOG.md new file mode 100644 index 00000000..fe0680cc --- /dev/null +++ b/node_modules/webdav/CHANGELOG.md @@ -0,0 +1,539 @@ +# WebDAV-Client changelog + +## v5.8.0 +_2025-02-12_ + + * [#391](https://github.com/perry-mitchell/webdav-client/pull/391) Attribute parsing support + * Updated dependencies + * **Bugfixes**: + * [#387](https://github.com/perry-mitchell/webdav-client/issues/387) Node engine set to minimum of `16` instead of supported `14` + +## v5.7.1 +_2024-08-03_ + + * **Bugfixes**: + * [#382](https://github.com/perry-mitchell/webdav-client/issues/382) `minimatch` dependency requires engines with Node >= 20 + +## v5.7.0 +_2024-08-02_ + + * [#381](https://github.com/perry-mitchell/webdav-client/pull/381) Upgraded dependencies (major version changes) + * **Bugfixes**: + * [#380](https://github.com/perry-mitchell/webdav-client/pull/380) `displayname` string fix + * [#378](https://github.com/perry-mitchell/webdav-client/pull/378) Types for quota bytes + * [#379](https://github.com/perry-mitchell/webdav-client/pull/379) DAV result types + +## v5.6.0 +_2024-04-24_ + + * Switch to `entities` over `he` + * **Bugfixes** + * [#366](https://github.com/perry-mitchell/webdav-client/issues/366) React-native import not working + +## v5.5.0 +_2024-03-18_ + + * [#303](https://github.com/perry-mitchell/webdav-client/issues/303) Partially update file contents + * [#329](https://github.com/perry-mitchell/webdav-client/issues/329) Overwrite option for copy/move file + * [#369](https://github.com/perry-mitchell/webdav-client/issues/369) Automatic auth mode + +## v5.4.0 +_2024-02-24_ + + * [#359](https://github.com/perry-mitchell/webdav-client/issues/359) React-Native specific build + * Updated dependencies + +## v5.3.2 +_2024-02-05_ + + * **Bugfix**: + * [#364](https://github.com/perry-mitchell/webdav-client/pull/364) XML entities double decoded + +## v5.3.1 +_2023-11-27_ + + * **Bugfix**: + * [#360](https://github.com/perry-mitchell/webdav-client/pull/360) Incorrect filename due to mishandling of XML-encoded href + +## v5.3.0 +_2023-08-30_ + + * [#205](https://github.com/perry-mitchell/webdav-client/issues/205) Search method + * **Bugfix**: + * [#355](https://github.com/perry-mitchell/webdav-client/issues/355) Can not be imported with newer node versions + * [#346](https://github.com/perry-mitchell/webdav-client/pull/346) Node import forces use of `esModuleInterop` flag + +## v5.2.3 +_2023-07-16_ + + * React-Native entry in `package.json` + +## v5.2.2 +_2023-06-29_ + + * **Bugfix**: + * [#339](https://github.com/perry-mitchell/webdav-client/issues/339) Unable to import files from `dist` + +## v5.2.1 +_2023-06-18_ + + * **Bugfix**: + * [#339](https://github.com/perry-mitchell/webdav-client/issues/339) Regression: `processResponsePayload` and other methods not exposed in exports + +## v5.2.0 +_2023-06-18_ + + * [#344](https://github.com/perry-mitchell/webdav-client/pull/344) Upgrade `fast-xml-parser` to new major (v4) + * **Bugfix**: + * [#336](https://github.com/perry-mitchell/webdav-client/issues/336) `fast-xml-parser` vulnerability + +## v5.1.0 +_2023-05-29_ + + * [#342](https://github.com/perry-mitchell/webdav-client/issues/342) Support custom remote base directory (other than path specified in URL): `remoteBasePath` + +## v5.0.0 +_2022-11-30_ + + * **Major release** + * [#326](https://github.com/perry-mitchell/webdav-client/issues/326) Build output is now ESM only (read [this](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c)) + * ~~[#269](https://github.com/perry-mitchell/webdav-client/issues/269)~~ [#335](https://github.com/perry-mitchell/webdav-client/pull/335) Axios replaced with Fetch + * [#178](https://github.com/perry-mitchell/webdav-client/issues/178) Support returning current directory info for `getDirectoryContents` + * [#332](https://github.com/perry-mitchell/webdav-client/issues/332) HA1 support for Digest authentication + * [#341](https://github.com/perry-mitchell/webdav-client/pull/341) Preserve stringified numbers with leading zeros + * **Bugfix**: + * [#204](https://github.com/perry-mitchell/webdav-client/issues/204) Missing engine restriction for Node + * [#159](https://github.com/perry-mitchell/webdav-client/issues/159) Missing error status code + +Breaking changes: + + * Download progress no longer supported (`onDownloadProgress`): [see discussion](https://github.com/perry-mitchell/webdav-client/issues/319#issuecomment-1328323167) + * Upload progress no longer supported (`onUploadProgress`): [see discussion](https://github.com/perry-mitchell/webdav-client/issues/319#issuecomment-1328323167) + * Node request limitations removed: `maxBodyLength` and `maxContentLength` are no longer needed/supported + +## v4.11.2 +_2022-11-19_ + + * **Bugfix**: + * [#323](https://github.com/perry-mitchell/webdav-client/issues/323) Cannot use namespace `HotPatcher` as a type + +## v4.11.1 +_2022-11-19_ + + * **Bugfix**: + * [#324](https://github.com/perry-mitchell/webdav-client/pull/324) Missing leading slash causes extra entries in `getDirectoryContents` call + +## v4.11.0 +_2022-08-21_ + + * [#315](https://github.com/perry-mitchell/webdav-client/pull/315) `HotPatcher` intermediate type annotation + +## v4.10.0 +_2022-05-16_ + + * [#291](https://github.com/perry-mitchell/webdav-client/pull/291) Correct string byte size calculations for `Content-Length` headers + * **Bugfix**: + * [#304](https://github.com/perry-mitchell/webdav-client/issues/304) React Native `putFileContents` fails with `TypeError: Right-hand side of 'instanceof' is not an object` + +## v4.9.0 +_2022-04-20_ + + * [#237](https://github.com/perry-mitchell/webdav-client/issues/237) `path` support for quota queries + * **Bugfix**: + * [#300](https://github.com/perry-mitchell/webdav-client/issues/300) Vulnerable dependency `url-parse` + +## v4.8.0 +_2022-01-11_ + + * [#282](https://github.com/perry-mitchell/webdav-client/issues/282) `onDownloadProgress` option + * [#285](https://github.com/perry-mitchell/webdav-client/pull/285) `AbortSignal` option support + * Node engine specified at `>=10` + +## v4.7.0 +_2021-08-27_ + + * [#65](https://github.com/perry-mitchell/webdav-client/issues/65) Lock / Unlock methods + +## v4.6.1 +_2021-08-14_ + + * **Bugfix**: + * [#267](https://github.com/perry-mitchell/webdav-client/pull/267) Fix `getFileContents` string handling of remote JSON files + +## v4.6.0 +_2021-05-21_ + + * `response` property on `WebDAVClientError` instances ([#261](https://github.com/perry-mitchell/webdav-client/issues/261)) + +## v4.5.0 +_2021-05-17_ + + * Update dependencies - Webpack v5 + * **Bugfix**: + * [#263](https://github.com/perry-mitchell/webdav-client/pull/263) Fix `putFileContents` `onUploadProgress` callback option + +## v4.4.0 +_2021-05-09_ + + * [#259](https://github.com/perry-mitchell/webdav-client/pull/259) Ensure correct collection path when creating directory + * [#258](https://github.com/perry-mitchell/webdav-client/pull/258) Handle prop status code in response when using `stat` + +## v4.3.0 +_2021-03-28_ + + * [#118](https://github.com/perry-mitchell/webdav-client/issues/118) `createDirectory` `recursive` option + +## v4.2.1 +_2021-03-07_ + +_Includes a new feature for v4: `data` override option in method options. This missing feature is actually a regression when compared to the v3 code-base, but is now a first-party citizen in v4._ + + * **Bugfix**: + * [#238](https://github.com/perry-mitchell/webdav-client/issues/238) Regression: Not possible to request custom properties in v4 + +## v4.2.0 +_2021-02-18_ + + * [#203](https://github.com/perry-mitchell/webdav-client/issues/203) `putFileContents` 412 response handling when `{ overwrite: false }` + * [#142](https://github.com/perry-mitchell/webdav-client/issues/142) Callbacks with `response`s for `createReadStream` and `createWriteStream` + * [#31](https://github.com/perry-mitchell/webdav-client/issues/31) Errors thrown for range requests that don't return `206 Partial Content` + +## v4.1.0 +_2021-02-15_ + + * Overridable `headers` option for most methods + * Set and get base client headers via `setHeaders` and `getHeaders` + +## v4.0.0 +_2021-02-01_ + + * **Major release** + * Project re-written in **Typescript** + +Breaking changes: + + * Authentication is **explicit** in v4, when not using basic/no authentication. [Specify the authentication type](https://github.com/perry-mitchell/webdav-client#authentication--connection) when creating the client. + * `headers` can be specified when creating a client. These are overridden by method-specific headers when making requests. + +## v3.6.2 +_2021-01-06_ + + * **Bugfixes**: + * [#231](https://github.com/perry-mitchell/webdav-client/pull/231) Unable to target files using custom request + * **Security Patches**: + * [#232](https://github.com/perry-mitchell/webdav-client/issues/232) Axios server-side request forgery vulerability ([CVE-2020-28168](https://github.com/advisories/GHSA-4w2v-q235-vp99)) + +## v3.6.1 +_2020-10-15_ + + * **Bugfixes**: + * [#221](https://github.com/perry-mitchell/webdav-client/issues/221) Stat function erroneously decodes paths with `%` in them + +## v3.6.0 +_2020-10-12_ + + * [#220](https://github.com/perry-mitchell/webdav-client/pull/220) `maxBodyLength` option for changing written files max size + * **Bugfixes**: + * [#218](https://github.com/perry-mitchell/webdav-client/issues/218) Invalid response error - No root multistatus + +## v3.5.0 +_2020-10-08_ + + * Upgrade dependencies (major versions) + * [axios upgrade -> 0.20](https://github.com/axios/axios/blob/master/CHANGELOG.md#0200-august-20-2020) + +## v3.4.0 +_2020-10-08_ + + * **Bugfixes**: + * [#215](https://github.com/perry-mitchell/webdav-client/pull/215) Excessive memory usage when uploading big files (axios max-redirects) + * [#213](https://github.com/perry-mitchell/webdav-client/pull/213) `getDirectoryContents` fails for directories with `&` in the name + +## v3.3.0 +_2020-04-19_ + + * Node 10 build configuration + * [#201](https://github.com/perry-mitchell/webdav-client/pull/201) Improved object merging for configurations (no merging instances) + * [#200](https://github.com/perry-mitchell/webdav-client/pull/200) `createWriteStream` callback support (when request finishes finishes) + * Improved filename decoding + * **Bugfix**: + * [#198](https://github.com/perry-mitchell/webdav-client/issues/198) Encoded characters in directory contents (HTML entities) + +## v3.2.0 +_2020-02-05_ + + * `exists` method + +## v3.1.0 +_2020-02-05_ + + * Improved parsing logic for more robust handling of various PROPFIND requests + * **Bugfix**: + * [#194](https://github.com/perry-mitchell/webdav-client/issues/194) Several properties not defined in directory-contents / stats payloads + * [#147](https://github.com/perry-mitchell/webdav-client/issues/147) `Content-length` header being attached to stream requests erroneously + +## v3.0.0 +_2020-01-26_ + + * Removed support for NodeJS < 10 + * Web support + * Replaced XML parsing library (no dependencies, no streaming - better web support) + * `createReadStream` and `createWriteStream` stubbed but disabled in web version + +## v2.10.2 +_2020-01-25_ + + * **Bugfix**: + * [#189](https://github.com/perry-mitchell/webdav-client/issues/189) Maximum call stack size exceeded during digest auth usage (property merging) + +## v2.10.1 +_2019-12-17_ + + * **Bugfix**: + * [#185](https://github.com/perry-mitchell/webdav-client/issues/185) Extra trailing slash after join for URL components on root account requests + +## v2.10.0 +_2019-10-12_ + + * [#174](https://github.com/perry-mitchell/webdav-client/pull/174) `customRequest` method for making custom requests + +## v2.9.1 +_2019-07-07_ + + * [#162](https://github.com/perry-mitchell/webdav-client/issues/162) etag.replace is not a function (etag string validation) + +## v2.9.0 +_2019-07-07_ + + * [#40](https://github.com/perry-mitchell/webdav-client/issues/40) Digest authentication support + +## v2.8.0 +_2018-05-26_ + + * Remove `path` dependency + +## v2.7.0 +_2019-05-23_ + + * [#149](https://github.com/perry-mitchell/webdav-client/issues/149) Upload progress for `putFileContents` + * [#154](https://github.com/perry-mitchell/webdav-client/pull/154) Normalise MIME type + +## v2.6.0 +_2019-03-03_ + + * [#122](https://github.com/perry-mitchell/webdav-client/issues/122) Glob functionality + * [#144](https://github.com/perry-mitchell/webdav-client/issues/144) Support uploading larger files + +## v2.5.0 +_2019-01-24_ + + * [#130](https://github.com/perry-mitchell/webdav-client/issues/130) Support for `deep` option on `getDirectoryContents` + +## v2.4.0 +_2019-01-23_ + + * [#132](https://github.com/perry-mitchell/webdav-client/issues/132) ETags in `getDirectoryContents` results and stats + +## v2.3.0 +_2019-01-22_ + + * [#134](https://github.com/perry-mitchell/webdav-client/issues/134) Allow access to all returned properties + +## v2.2.1 +_2019-01-10_ + + * [#121](https://github.com/perry-mitchell/webdav-client/issues/121) Unexpected close tag - trailing slash bug + * [#127](https://github.com/perry-mitchell/webdav-client/issues/127) Force trailing slash + * [#126](https://github.com/perry-mitchell/webdav-client/issues/126) `copyFile`: Failed to execute 'setRequestHeader' on 'XMLHttpRequest': Value is not a valid ByteString + +## v2.2.0 +_2018-12-12_ + + * Replace Buffer usage for base64 encoding with `base-64` package + +## v2.1.0 +_2018-12-12_ + + * Move node core imports into functions (downstream compatibility - React Native) + * Upgrade dependencies + +## **v2.0.0** +_2018-11-20_ + + * **Major version update!** + * Fetch has been replaced with Axios! tl;dr `fetch` is horrible when looking to make webdav-client compatible cross-platform. Axios is a great alternative. + * Detailed responses now available on some methods (providing response headers, for example) + +## 1.6.1 +_2018-10-06_ + + * [#109](https://github.com/perry-mitchell/webdav-client/issues/109) `getDirectoryContents` fails on Seafile responses + * Remove dependency on just a handful of namespaces for multistatus responses + +## 1.6.0 +_2018-09-15_ + + * Update dependencies, audit vulnerabilities + +## 1.5.5 +_2018-09-13_ + + * [#104](https://github.com/perry-mitchell/webdav-client/issues/104) `path.posix` failed in browserify + * **Dev**: + * Webpack & KarmaJS dev testing in Chrome + +## 1.5.4 +_2018-09-11_ + + * [#101](https://github.com/perry-mitchell/webdav-client/issues/101) `getDirectoryContents` fails on windows + * [#98](https://github.com/perry-mitchell/webdav-client/issues/98) Moving items fails when destination contains spaces + +## 1.5.3 +_2018-07-07_ + + * ([#91](https://github.com/perry-mitchell/webdav-client/issues/91) [#93](https://github.com/perry-mitchell/webdav-client/issues/93)): Bugfix: Encoding issues with special characters + +## 1.5.2 +_2018-03-25_ + + * Fix bug where requesting directory contents at paths with trailing slashes would return parent directory in results + +## 1.5.1 +_2018-03-23_ + + * ([#81](https://github.com/perry-mitchell/webdav-client/issues/81)): Bad encoding when paths are prefixed with directory separator + +## 1.5.0 +_2018-03-19_ + + * Add OAuth2 authentication support (via token) + * Add `getFileDownloadLink` method + +## 1.4.0 +_2018-03-13_ + + * Add `copyFile` method + +## 1.3.0 +_2018-03-07_ + + * Change `deepmerge` dependency to `merge` + * ([#79](https://github.com/perry-mitchell/webdav-client/issues/79)): getFileContents arrayBuffer default causes incompatibilities + * Use `buffer()` where available, and fallback to `arrayBuffer()` otherwise + +## 1.2.1 +_2018-02-26_ + + * Downgrade `deepmerge` to 1.5.2 to fix Webpack bug + +## 1.2.0 +_2018-02-24_ + + * ([#74](https://github.com/perry-mitchell/webdav-client/issues/74)): TypeError: res.buffer is not a function (`ArrayBuffer` replaces `Buffer` for node-fetch) + * ([#66](https://github.com/perry-mitchell/webdav-client/issues/66)): Special characters break output (unicode/non-latin encoding) + +## 1.1.2 +_2018-02-21_ + + * Development bug fixes + +## 1.1.1 + +**Bugfixes**: + + * ([#68](https://github.com/perry-mitchell/webdav-client/issues/68)): Fetched directory appearing in results + +## 1.1.0 +_2017-08-30_ + + * Add transpilation process for published library + +## 1.0.1 +_2017-08-07_ + + * Allow `test/` directory during publish (used downstream) + +## **1.0.0** +_2017-08-06_ + + * Complete rewrite of the project + * Better testing setup with webdav-server + * **Bugfixes**: + * [Directory contents parse bug](https://github.com/perry-mitchell/webdav-client/issues/54) + +## 1.0.0-rc1 +_2017-07-01_ + + * URI encoding for special characters + * Writeable streams + * Internal `fetch` override support + * Quota support + * Remove duplicate methods + * Optimise `stat` depth + +## 0.10.0 +_2017-06-24_ + + * Disable native `window.fetch` in browsers + +## 0.9.0 +_2017-06-07_ + + * Add support for ranges with only `start` + +## 0.8.0 +_2017-06-07_ + + * Add stream support (GET) + * Add `createReadStream` method + * Add `getFileStream` method + * Update option merging behaviour for default values + +## 0.7.0 +_2017-06-03_ + + * Remove lodash (performance improvement) + +## 0.6.0 +_2017-04-13_ + + * Support for non-prefixed XML elements in WebDAV response + * HTTP status code for thrown exceptions + +## 0.5.0 +_2017-02-11_ + + * Use `window.fetch` when available in browser + +## 0.4.1 +_2017-02-04_ + + * Fix `putFileContents` authorisation bug + +## 0.4.0 +_2017-01-29_ + + * Add `options` argument to all methods, allowing custom headers + * **(Breaking)** + * Move `format` arguments to `options` object + * Removed node 0.12 support + +## 0.3.1 +_2017-01-18_ + + * Remove node querystring calls for downstream compat + +## 0.2.0 +_2017-01-03_ + + * Added `options` parameter to `putFileContents` + +## 0.1.1 +_2016_10_24_ + + * Fixed username/password authentication with special characters + +## 0.1.0 +_2016-10-13_ + + * Initial release diff --git a/node_modules/webdav/CONTRIBUTING.md b/node_modules/webdav/CONTRIBUTING.md new file mode 100644 index 00000000..d9c6dbbb --- /dev/null +++ b/node_modules/webdav/CONTRIBUTING.md @@ -0,0 +1,19 @@ +# Contribution guide + +## Issues and Questions +When making an issue for **webdav-client**, be sure to be respectful and kind - this is free software built on peoples' spare time. Please do not assume that any or all of your requests will be met, and try to be as clear as possible when communicating. + +You should include all necessary information relating to potential bugs - unclear or non-constructive issues will be closed without notice. If a bug report details a fault with some part of the processing, sending or receiving of files or data you should include a test case of some sort, using [webdav-server](https://www.npmjs.com/package/webdav-server) as the webdav server. We cannot test against your WebDAV services or accounts in most cases, so issues should be reproduced openly. + +## Pull Requests +When making a pull request for an existing issue or feature that is clearly beneficial (subject to opinion), make sure that all tests pass before pushing. No pull request will be accepted that has failing tests. Although some commands relating to testing or formatting may not work on some operating systems (like Windows0), it is **your** responsibility to ensure the code is formatted correctly. + +When making a pull request for an item not listed as an issue or that is controversial (also subject to opinion), be aware that the request may be denied and the PR closed. It is always best to create an issue for a discussion before making a PR, if you are unsure of the feature's worth. + +## Documentation +PRs to add/update documentation are welcome, but please, ensure that you edit in **Markdown** with as little HTML as possible (none is preferable). Do not use auto-formatters to generate the documentation files. + +`API.md` is generated on release - there is no need to update it yourself. + +## Development Support +Please note that only **Linux** and **Mac** are supported as development environments. No commands that form part of the development cycle are guaranteed to work on Windows, for instance. diff --git a/node_modules/webdav/LICENSE b/node_modules/webdav/LICENSE new file mode 100644 index 00000000..cb600e2e --- /dev/null +++ b/node_modules/webdav/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2016 Perry Mitchell + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/node_modules/webdav/LOCK_CONTACT.md b/node_modules/webdav/LOCK_CONTACT.md new file mode 100644 index 00000000..d53e33b4 --- /dev/null +++ b/node_modules/webdav/LOCK_CONTACT.md @@ -0,0 +1,5 @@ +# WebDAV Client Lock + +If you've reached this page by following a URL attached to a WebDAV resource lock, then the client imposing the lock has not specified a custom/personalised lock contact URL. This means that there is unfortunately no way to contact the owning user by simply inspecting the lock. + +If you've reached this page by exploring the WebDAV client library repository, this page is the default `LOCK` method contact URL. You can override it when creating a new WebDAV client instance. diff --git a/node_modules/webdav/README.md b/node_modules/webdav/README.md new file mode 100644 index 00000000..93854f38 --- /dev/null +++ b/node_modules/webdav/README.md @@ -0,0 +1,761 @@ +![WebDAV](https://raw.githubusercontent.com/perry-mitchell/webdav-client/master/webdav.jpg) + +> A WebDAV client, written in Typescript, for NodeJS and the browser + +![build status](https://github.com/perry-mitchell/webdav-client/actions/workflows/test.yml/badge.svg) [![npm version](https://badge.fury.io/js/webdav.svg)](https://www.npmjs.com/package/webdav) [![monthly downloads](https://img.shields.io/npm/dm/webdav.svg)](https://www.npmjs.com/package/webdav) [![total downloads](https://img.shields.io/npm/dt/webdav.svg?label=total%20downloads)](https://www.npmjs.com/package/webdav) ![Dependents (via libraries.io)](https://img.shields.io/librariesio/dependents/npm/webdav) + +## About + +WebDAV is a well-known, stable and highly flexible protocol for interacting with remote filesystems via an API. Being that it is so widespread, many file hosting services such as **Nextcloud**/**ownCloud**, **Box** and **Yandex** use it as a fallback to their primary interfaces. + +This library provides a **WebDAV client** interface that makes interacting with WebDAV enabled services easy. The API returns promises and resolve with the results. It parses and prepares directory-contents requests for easy consumption, as well as providing methods for fetching things like file stats and quotas. + +This library's motivation is **not** to follow an RFC or to strictly adhere to standard WebDAV interfaces, but to provide an easy-to-consume client API for working with most WebDAV services from Node or the browser. + +### Supported Versions / Environments + +Version 5 is under active development. Version 4 is in support mode, and will receive security and stability related bugfixes. Earlier versions are deprecated and will not receive updates. + +**Note:** Version 4 support will be dropped January 2025. Migrate to v5 as soon as possible. + +Version 5 upgrades the library to use ESM (ECMAScript Modules), and so your environment must fit one of the following formats to be able to use this library: + + * NodeJS project with `"type": "module"` in `package.json` (ESM mode) + * Web project bundled with a tool like Webpack that can handle ESM + * React-native projects (via direct import or using automatic react-native entry) + +If you're not ready to upgrade, you may consider using version 4 of this library. + +#### Requests + +This library uses [`@buttercup/fetch`](https://github.com/buttercup/fetch) to make requests in a cross-platform manner. It uses the browser's native `fetch` if present, or a polyfill if not. In Node and other environments it uses [`node-fetch`](https://github.com/node-fetch/node-fetch). + +Versions before v5 used Axios for requests. + +#### Node support + +Support table: + +| Library Major Version | Node JS Range | +|-----------------------|-------------------| +| v5 | 14+ | +| v4 | 10-18 | +| v3 | 10-16 | +| v2 | 6-14 | +| v1 | 4-12 | + +#### Browser support + +Browser environments are supported from version 3 onwards of this library. + +As mentioned above, v5 introduced ESM and this may require additional configuration when bundling for the browser. + +_Although you may choose to transpile this library's default entry point (NodeJS) yourself, it is not advised - use the dedicated web version instead._ + +In version 4 you had to use a different entry-point for the web version, and while this is still possible to use in version 5, you no longer need to: + +```typescript +import { createClient } from "webdav/web"; + +// or + +import { createClient } from "webdav"; + +// both work fine in supported bundlers +``` + +Versions 3/4 supported a UMD-style module in the browser, but this is no longer supported in version 5. Version 5 provides only an ESM-enabled bundle that can be imported into other ESM-supporting projects. + +**NB:** Streams are not available within the browser, so `createReadStream` and `createWriteStream` are just stubbed. Calling them will throw an exception. + +#### React-Native support + +React-Native is better supported as of version `5.6.0`, using a specific build for the platform. The import should be automatic, but can be forced by importing from `/react-native` directly: + +```typescript +import { createClient } from "webdav/react-native"; +``` + +**NB:** Note that for some reason, the Metro build system doesn't properly resolve using these entries, and you may need to customise your babel config for React Native to correctly import this library: + +```javascript +module.exports = { + presets: ["module:metro-react-native-babel-preset"], + plugins: [ + [ + "module-resolver", + { + alias: { + // Point the webdav client entry to the react native build: + webdav: "webdav/dist/react-native" + }, + extensions: [".tsx", ".ts", ".js", ".jsx", ".json"] + } + ] + ] +}; +``` + +When using this override, you can simply import from `webdav`. + +### Types + +Typescript types are exported with this library for the Node build. All of the types can also be directly imported from the module: + +```typescript +import { AuthType, createClient } from "webdav"; + +const client = createClient("https://some-server.org", { + authType: AuthType.Digest, + username: "user", + password: "pass" +}); +``` + +## Installation + +Simple install as a dependency using npm: + +``` +npm install webdav --save +``` + +## Usage + +Usage entails creating a client adapter instance by calling the factory function `createClient`: + +```typescript +const { createClient } = require("webdav"); + +const client = createClient( + "https://webdav.example.com/marie123", + { + username: "marie", + password: "myS3curePa$$w0rd" + } +); + +// Get directory contents +const directoryItems = await client.getDirectoryContents("/"); +// Outputs a structure like: +// [{ +// filename: "/my-file.txt", +// basename: "my-file.txt", +// lastmod: "Mon, 10 Oct 2018 23:24:11 GMT", +// size: 371, +// type: "file" +// }] +``` + +### Authentication & Connection + +The WebDAV client automatically detects which authentication to use, between `AuthType.None` and `AuthType.Password`, if no `authType` configuration parameter is provided. For `AuthType.Token` or `AuthType.Digest`, you must specify it explicitly. + +Setting the `authType` will automatically manage the `Authorization` header when connecting. + +You can set the `authType` to `AuthType.Auto` if you're unsure whether the remote server requires **digest** or **password** based authentication. + +#### Basic/no authentication + +You can use the client without authentication if the server doesn't require it - simply avoid passing any values to `username`, `password` in the config. + +To use basic authentication, simply pass a `username` and `password` in the config. + +This library also allows for overriding the built in HTTP and HTTPS agents by setting the properties `httpAgent` & `httpsAgent` accordingly. These should be instances of node's [http.Agent](https://nodejs.org/api/http.html#http_class_http_agent) and [https.Agent](https://nodejs.org/api/https.html#https_class_https_agent) respectively. + +#### OAuth tokens + +To use a token to authenticate, pass the token data to the `token` field and specify the `authType`: + +```typescript +createClient( + "https://address.com", + { + authType: AuthType.Token, + token: { + access_token: "2YotnFZFEjr1zCsicMWpAA", + token_type: "example", + expires_in: 3600, + refresh_token: "tGzv3JOkF0XG5Qx2TlKWIA", + example_parameter: "example_value" + } + } +); +``` + +You can also provide the HA1 ([see here for details](https://en.wikipedia.org/wiki/Digest_access_authentication#Overview)) yourself. This enables you to generate the HA1 at the time the user is logged in and persist it, so you do not have persist the password itself. + +```typescript +createClient("https://address.com", { + authType: AuthType.Digest, + username: "someUser", + password: "", + ha1: "your previously generated ha1 here" +}); +``` + +#### Digest authentication + +If a server requires digest-based authentication, you can enable this functionality by the `authType` configuration parameter, as well as providing a `username` and `password`: + +```typescript +createClient( + "https://address.com", + { + authType: AuthType.Digest, + username: "someUser", + password: "myS3curePa$$w0rd" + } +); +``` + +### Client configuration + +The `createClient` method takes a WebDAV service URL, and a configuration options parameter. + +The available configuration options are as follows: + +| Option | Default | Description | +|---------------|---------------|---------------------------------------------------| +| `authType` | `null` | The authentication type to use. If not provided, defaults to trying to detect based upon whether `username` and `password` were provided. | +| `contactHref` | _[This URL](https://github.com/perry-mitchell/webdav-client/blob/master/LOCK_CONTACT.md)_ | Contact URL used for LOCKs. | +| `headers` | `{}` | Additional headers provided to all requests. Headers provided here are overridden by method-specific headers, including `Authorization`. | +| `httpAgent` | _None_ | HTTP agent instance. Available only in Node. See [http.Agent](https://nodejs.org/api/http.html#http_class_http_agent). | +| `httpsAgent` | _None_ | HTTPS agent instance. Available only in Node. See [https.Agent](https://nodejs.org/api/https.html#https_class_https_agent). | +| `password` | _None_ | Password for authentication. | +| `token` | _None_ | Token object for authentication. | +| `username` | _None_ | Username for authentication. | +| `withCredentials` | _None_ | Credentials inclusion setting for the request, | + +### Client methods + +The `WebDAVClient` interface type contains all the methods and signatures for the WebDAV client instance. + +#### copyFile + +Copy a file from one location to another. + +```typescript +await client.copyFile( + "/images/test.jpg", + "/public/img/test.jpg" +); +``` + +```typescript +(filename: string, destination: string, options?: WebDAVMethodOptions) => Promise +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `filename` | Yes | The source filename. | +| `destination` | Yes | The destination filename. | +| `options` | No | [Method options](#method-options). | + +#### createDirectory + +Create a new directory. + +```typescript +await client.createDirectory("/data/system/storage"); +``` + +```typescript +(path: string, options?: CreateDirectoryOptions) => Promise +``` + +| Argument | Required | Description | +|-----------------------|-----------|-----------------------------------------------| +| `path` | Yes | The path to create. | +| `options` | No | Create directory options. | +| `options.recursive` | No | Recursively create directories if they do not exist. | + +_`options` extends [method options](#method-options)._ + +##### Recursive creation + +Recursive directory creation is expensive request-wise. Multiple `stat` requests are made (totalling the depth of the path that exists, +1) to detect what parts of the path already exist, until finding a segment that doesn't exist - where it then only requests the _creation_ method. + +For example, a recursive call to create a path `/a/b/c/d/e`, where `/a/b` already exists, will result in **3** `stat` requests (for `/a`, `/a/b` and `/a/b/c`) and **3** `createDirectory` requests (for `/a/b/c`, `/a/b/c/d` and `/a/b/c/d/e`). + +#### createReadStream + +Synchronously create a readable stream for a remote file. + +_Note that although a stream is returned instantly, the connection and fetching of the file is still performed asynchronously in the background. There will be some delay before the stream begins receiving data._ + +```typescript +client + .createReadStream("/video.mp4") + .pipe(fs.createWriteStream("~/video.mp4")); +``` + +If you want to stream only part of the file, you can specify the `range` in the options argument: + +```typescript +client + .createReadStream( + "/video.mp4", + { range: { start: 0, end: 1024 } } + ).pipe(fs.createWriteStream("~/video.mp4")); +``` + +```typescript +(filename: string, options?: CreateReadStreamOptions) => Stream.Readable +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `callback` | No | Callback to fire with the response of the request. | +| `filename` | Yes | The remote file to stream. | +| `options` | No | Read stream options. | +| `options.range` | No | Stream range configuration. | +| `options.range.start` | Yes | Byte-position for the start of the stream. | +| `options.range.end` | No | Byte-position for the end of the stream. | + +_`options` extends [method options](#method-options)._ + +#### createWriteStream + +Create a write stream targeted at a remote file. + +_Note that although a stream is returned instantly, the connection and writing to the remote file is still performed asynchronously in the background. There will be some delay before the stream begins piping data._ + +```typescript +fs + .createReadStream("~/Music/song.mp3") + .pipe(client.createWriteStream("/music/song.mp3")); +``` + +```typescript +(filename: string, options?: CreateWriteStreamOptions, callback?: CreateWriteStreamCallback) => Stream.Writable +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `filename` | Yes | The remote file to stream. | +| `options` | No | Write stream options. | +| `options.overwrite` | No | Whether or not to overwrite the remote file if it already exists. Defaults to `true`. | +| `callback` | No | Callback to fire once the connection has been made and streaming has started. Callback is called with the response of the request. | + +_`options` extends [method options](#method-options)._ + +#### customRequest + +Custom requests can be made to the attached host by calling `customRequest`. Custom requests provide the boilerplate authentication and other request options used internally within the client. + +```typescript +const resp: Response = await this.client.customRequest("/alrighty.jpg", { + method: "PROPFIND", + headers: { + Accept: "text/plain", + Depth: "0" + } +}); +const result: DAVResult = await parseXML(await resp.text()); +const stat: FileStat = parseStat(result, "/alrighty.jpg", false); +``` + +```typescript +(path: string, requestOptions: RequestOptionsCustom) => Promise +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `path` | Yes | The path to make a custom request against. | +| `requestOptions` | Yes | Request options - required parameters such as `url`, `method` etc. - Refer to the `RequestOptionsCustom` type definition. | + +_The request options parameter **does not** extend [method options](#method-options) as things like `headers` can already be specified._ + +#### deleteFile + +Delete a remote file. + +```typescript +await client.deleteFile("/tmp.dat"); +``` + +```typescript +(filename: string, options?: WebDAVMethodOptions) => Promise +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `filename` | Yes | The file to delete. | +| `options` | No | [Method options](#method-options). | + +#### exists + +Check if a file or directory exists. + +```typescript +if (await client.exists("/some/path") === false) { + await client.createDirectory("/some/path"); +} +``` + +```typescript +(path: string, options?: WebDAVMethodOptions) => Promise +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `path` | Yes | The remote path to check. | +| `options` | No | [Method options](#method-options). | + +#### getDirectoryContents + +Get the contents of a remote directory. Returns an array of [item stats](#item-stats). + +```typescript +// Get current directory contents: +const contents = await client.getDirectoryContents("/"); +// Get all contents: +const contents = await client.getDirectoryContents("/", { deep: true }); +``` + +Files can be globbed using the `glob` option (processed using [`minimatch`](https://github.com/isaacs/minimatch)). When using a glob pattern it is recommended to fetch `deep` contents: + +```typescript +const images = await client.getDirectoryContents("/", { deep: true, glob: "/**/*.{png,jpg,gif}" }); +``` + +```typescript +(path: string, options?: GetDirectoryContentsOptions) => Promise | ResponseDataDetailed>> +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `path` | Yes | The path to fetch the contents of. | +| `options` | No | Configuration options. | +| `options.deep` | No | Fetch deep results (recursive). Defaults to `false`. | +| `options.details` | No | Fetch detailed results (item stats, headers). Defaults to `false`. | +| `options.glob` | No | Glob string for matching filenames. Not set by default. | + +_`options` extends [method options](#method-options)._ + +#### getFileContents + +Fetch the contents of a remote file. Binary contents are returned by default (`Buffer`): + +```typescript +const buff: Buffer = await client.getFileContents("/package.zip"); +``` + +_It is recommended to use streams if the files being transferred are large._ + +Text files can also be fetched: + +```typescript +const str: string = await client.getFileContents("/config.json", { format: "text" }); +``` + +```typescript +(filename: string, options?: GetFileContentsOptions) => Promise> +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `filename` | Yes | The file to fetch the contents of. | +| `options` | No | Configuration options. | +| `options.details` | No | Fetch detailed results (additional headers). Defaults to `false`. | +| `options.format` | No | Whether to fetch binary ("binary") data or textual ("text"). Defaults to "binary". | + +_`options` extends [method options](#method-options)._ + +#### getFileDownloadLink + +Generate a public link where a file can be downloaded. This method is synchronous. **Exposes authentication details in the URL**. + +_Not all servers may support this feature. Only Basic authentication and unauthenticated connections support this method._ + +```typescript +const downloadLink: string = client.getFileDownloadLink("/image.png"); +``` + +```typescript +(filename: string) => string +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `filename` | Yes | The remote file to generate a download link for. | + +#### getFileUploadLink + +Generate a URL for a file upload. This method is synchronous. **Exposes authentication details in the URL**. + +```typescript +const uploadLink: string = client.getFileUploadLink("/image.png"); +``` + +```typescript +(filename: string) => string +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `filename` | Yes | The remote file to generate an upload link for. | + +#### getQuota + +Get the quota information for the current account: + +```typescript +const quota: DiskQuota = await client.getQuota(); +// { +// "used": 1938743, +// "available": "unlimited" +// } +``` + +```typescript +(options?: GetQuotaOptions) => Promise> +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `options` | No | Configuration options. | +| `options.details` | No | Return detailed results (headers etc.). Defaults to `false`. | +| `options.path` | No | Path used to make the quota request. | + +_`options` extends [method options](#method-options)._ + +#### lock + +Lock a remote resource (using a **write** lock). + +```typescript +const lock = await client.lock("/file.doc"); + +// Later +await client.unlock("/file.doc", lock.token); +``` + +```typescript +(path: string, options?: LockOptions) => Promise +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `path` | Yes | The path to lock. | +| `options` | No | Configuration options. | +| `options.timeout` | No | WebDAV lock requested timeout. See the [WebDAV `Timeout` header documentation](https://docs.microsoft.com/en-us/previous-versions/office/developer/exchange-server-2003/aa143141(v=exchg.65)). | +| `options.refreshToken` | No | Previous valid lock token that should be refreshed. | + +_`options` extends [method options](#method-options)._ + +#### moveFile + +Move a file to another location. + +```typescript +await client.moveFile("/file1.png", "/file2.png"); +``` + +```typescript +(filename: string, destinationFilename: string, options?: WebDAVMethodOptions) => Promise +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `filename` | Yes | File to move. | +| `destinationFilename` | Yes | Destination filename. | +| `options` | No | [Method options](#method-options). | + +#### putFileContents + +Write data to a remote file. Returns `false` when file was not written (eg. `{ overwrite: false }` and file exists), and `true` otherwise. + +```typescript +// Write a buffer: +await client.putFileContents("/my/file.jpg", imageBuffer, { overwrite: false }); +// Write a text file: +await client.putFileContents("/my/file.txt", str); +``` + +```typescript +(filename: string, data: string | BufferLike | Stream.Readable, options?: PutFileContentsOptions) => Promise +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `filename` | Yes | File to write to. | +| `data` | Yes | The data to write. Can be a string, buffer or a readable stream. | +| `options` | No | Configuration options. | +| `options.contentLength` | No | Data content length override. Either a boolean (`true` (**default**) = calculate, `false` = don't set) or a number indicating the exact byte length of the file. | +| `options.overwrite` | No | Whether or not to override the remote file if it exists. Defaults to `true`. | + +_`options` extends [method options](#method-options)._ + +#### partialUpdateFileContents + +Update a remote file with a partial update. This method is useful for updating a file without having to download and re-upload the entire file. + +**_Note that this method is not standardised and may not be supported by all servers._** To use this feature, one of the following must be met: + * WebDav is served by Apache with the [mod_dav](https://httpd.apache.org/docs/2.4/mod/mod_dav.html) module + * The server supports Sabredav PartialUpdate Extension (https://sabre.io/dav/http-patch/) + +```typescript +(filePath: string, start: number, end: number, data: string | BufferLike | Stream.Readable, options?: WebDAVMethodOptions)=> Promise +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `filePath` | Yes | File to update. | +| `start` | Yes | Start byte position. (inclusive) | +| `end` | Yes | End byte position. (inclusive) | +| `data` | Yes | The data to write. Can be a string, buffer or a readable stream. | +| `options` | No | Configuration options. | + +#### search + +Perform a WebDAV search as per [rfc5323](https://www.ietf.org/rfc/rfc5323.html). + +```typescript +const searchRequest = ` + + + + Find files changed last week + + +` +const result: SearchResult = await client.search("/some-collection", { data: searchRequest }); +``` + +```typescript +(path: string, options?: SearchOptions) => Promise> +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `path` | Yes | Remote path to which executes the search. | +| `options` | No | Configuration options. | +| `options.details` | No | Return detailed results (headers etc.). Defaults to `false`. | + +_`options` extends [method options](#method-options)._ + +#### stat + +Get a file or directory stat object. Returns an [item stat](#item-stats). + +```typescript +const stat: FileStat = await client.stat("/some/file.tar.gz"); +``` + +```typescript +(path: string, options?: StatOptions) => Promise> +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `path` | Yes | Remote path to stat. | +| `options` | No | Configuration options. | +| `options.details` | No | Return detailed results (headers etc.). Defaults to `false`. | + +_`options` extends [method options](#method-options)._ + +#### unlock + +Unlock a locked resource using a token. + +```typescript +await client.unlock("/file.doc", lock.token); +``` + +```typescript +(path: string, token:string, options?: WebDAVMethodOptions) => Promise +``` + +| Argument | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `path` | Yes | Remote path to unlock. | +| `token` | Yes | Token string from a previous lock request. | +| `options` | No | Configuration options. | + +_`options` extends [method options](#method-options)._ + +##### Custom properties + +For requests like `stat`, which use the `PROPFIND` method under the hood, it is possible to provide a custom request body to the method so that the server may respond with additional/different data. Overriding of the body can be performed by setting the `data` property in the [method options](#method-options). + +### Method options + +Most WebDAV methods extend `WebDAVMethodOptions`, which allow setting things like custom headers. + +| Option | Required | Description | +|-------------------|-----------|-----------------------------------------------| +| `data` | No | Optional body/data value to send in the request. This overrides the original body of the request, if applicable. | +| `headers` | No | Optional headers object to apply to the request. These headers override all others, so be careful. | +| `signal` | No | Instance of [`AbortSignal`](https://developer.mozilla.org/en-US/docs/Web/API/AbortSignal), for aborting requests. | + +### Common data structures + +#### Item stats + +Item stats are objects with properties that descibe a file or directory. They resemble the following: + +```json +{ + "filename": "/test", + "basename": "test", + "lastmod": "Tue, 05 Apr 2016 14:39:18 GMT", + "size": 0, + "type": "directory", + "etag": null +} +``` + +or: + +```json +{ + "filename": "/image.jpg", + "basename": "image.jpg", + "lastmod": "Sun, 13 Mar 2016 04:23:32 GMT", + "size": 42497, + "type": "file", + "mime": "image/jpeg", + "etag": "33a728c7f288ede1fecc90ac6a10e062" +} +``` + +Properties: + +| Property name | Type | Present | Description | +|---------------|---------|--------------|---------------------------------------------| +| filename | String | Always | File path of the remote item | +| basename | String | Always | Base filename of the remote item, no path | +| lastmod | String | Always | Last modification date of the item | +| size | Number | Always | File size - 0 for directories | +| type | String | Always | Item type - "file" or "directory" | +| mime | String | Files only | Mime type - for file items only | +| etag | String / null | When supported | [ETag](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/ETag) of the file | +| props | Object | `details: true` | Props object containing all item properties returned by the server | + + +#### Detailed responses + +Requests that return results, such as `getDirectoryContents`, `getFileContents`, `getQuota`, `search` and `stat`, can be configured to return more detailed information, such as response headers. Pass `{ details: true }` to their options argument to receive an object like the following: + +| Property | Type | Description | +|--------------|-----------------|----------------------------------------| +| data | * | The data returned by the procedure. Will be whatever type is returned by calling without `{ details: true }` | +| headers | Object | The response headers. | +| status | Number | The numeric status code. | +| statusText | String | The status text. | + +### CORS +CORS is a security enforcement technique employed by browsers to ensure requests are executed to and from expected contexts. It can conflict with this library if the target server doesn't return CORS headers when making requests from a browser. It is your responsibility to handle this. + +It is a known issue that Nextcloud servers by default don't return friendly CORS headers, making working with this library within a browser context impossible. You can of course force the addition of CORS headers (Apache or Nginx configs) yourself, but do this at your own risk. + +## Projects using this WebDAV client + + * [Buttercup Password Manager](https://github.com/buttercup) + * [Nextcloud Server](https://github.com/nextcloud/server) + * [Nextcloud Photos](https://github.com/nextcloud/photos) + * [ownCloud SDK](https://github.com/owncloud/owncloud-sdk) + * [React OxIDE](https://github.com/bootrino/reactoxide) + * [BackItUp](https://github.com/simatec/ioBroker.backitup) diff --git a/node_modules/webdav/dist/node/auth/basic.d.ts b/node_modules/webdav/dist/node/auth/basic.d.ts new file mode 100644 index 00000000..ffff2566 --- /dev/null +++ b/node_modules/webdav/dist/node/auth/basic.d.ts @@ -0,0 +1,2 @@ +import { AuthHeader } from "../types.js"; +export declare function generateBasicAuthHeader(username: string, password: string): AuthHeader; diff --git a/node_modules/webdav/dist/node/auth/basic.js b/node_modules/webdav/dist/node/auth/basic.js new file mode 100644 index 00000000..7aede73b --- /dev/null +++ b/node_modules/webdav/dist/node/auth/basic.js @@ -0,0 +1,5 @@ +import { toBase64 } from "../tools/encode.js"; +export function generateBasicAuthHeader(username, password) { + const encoded = toBase64(`${username}:${password}`); + return `Basic ${encoded}`; +} diff --git a/node_modules/webdav/dist/node/auth/digest.d.ts b/node_modules/webdav/dist/node/auth/digest.d.ts new file mode 100644 index 00000000..756a1557 --- /dev/null +++ b/node_modules/webdav/dist/node/auth/digest.d.ts @@ -0,0 +1,5 @@ +import { DigestContext, Response } from "../types.js"; +export declare function createDigestContext(username: string, password: string, ha1: string): DigestContext; +export declare function generateDigestAuthHeader(options: any, digest: DigestContext): string; +export declare function parseDigestAuth(response: Response, _digest: DigestContext): boolean; +export declare function responseIndicatesDigestAuth(response: Response): boolean; diff --git a/node_modules/webdav/dist/node/auth/digest.js b/node_modules/webdav/dist/node/auth/digest.js new file mode 100644 index 00000000..c98f4df8 --- /dev/null +++ b/node_modules/webdav/dist/node/auth/digest.js @@ -0,0 +1,72 @@ +import md5 from "md5"; +import { ha1Compute } from "../tools/crypto.js"; +const NONCE_CHARS = "abcdef0123456789"; +const NONCE_SIZE = 32; +export function createDigestContext(username, password, ha1) { + return { username, password, ha1, nc: 0, algorithm: "md5", hasDigestAuth: false }; +} +export function generateDigestAuthHeader(options, digest) { + const url = options.url.replace("//", ""); + const uri = url.indexOf("/") == -1 ? "/" : url.slice(url.indexOf("/")); + const method = options.method ? options.method.toUpperCase() : "GET"; + const qop = /(^|,)\s*auth\s*($|,)/.test(digest.qop) ? "auth" : false; + const ncString = `00000000${digest.nc}`.slice(-8); + const ha1 = ha1Compute(digest.algorithm, digest.username, digest.realm, digest.password, digest.nonce, digest.cnonce, digest.ha1); + const ha2 = md5(`${method}:${uri}`); + const digestResponse = qop + ? md5(`${ha1}:${digest.nonce}:${ncString}:${digest.cnonce}:${qop}:${ha2}`) + : md5(`${ha1}:${digest.nonce}:${ha2}`); + const authValues = { + username: digest.username, + realm: digest.realm, + nonce: digest.nonce, + uri, + qop, + response: digestResponse, + nc: ncString, + cnonce: digest.cnonce, + algorithm: digest.algorithm, + opaque: digest.opaque + }; + const authHeader = []; + for (const k in authValues) { + if (authValues[k]) { + if (k === "qop" || k === "nc" || k === "algorithm") { + authHeader.push(`${k}=${authValues[k]}`); + } + else { + authHeader.push(`${k}="${authValues[k]}"`); + } + } + } + return `Digest ${authHeader.join(", ")}`; +} +function makeNonce() { + let uid = ""; + for (let i = 0; i < NONCE_SIZE; ++i) { + uid = `${uid}${NONCE_CHARS[Math.floor(Math.random() * NONCE_CHARS.length)]}`; + } + return uid; +} +export function parseDigestAuth(response, _digest) { + const isDigest = responseIndicatesDigestAuth(response); + if (!isDigest) { + return false; + } + const re = /([a-z0-9_-]+)=(?:"([^"]+)"|([a-z0-9_-]+))/gi; + for (;;) { + const authHeader = (response.headers && response.headers.get("www-authenticate")) || ""; + const match = re.exec(authHeader); + if (!match) { + break; + } + _digest[match[1]] = match[2] || match[3]; + } + _digest.nc += 1; + _digest.cnonce = makeNonce(); + return true; +} +export function responseIndicatesDigestAuth(response) { + const authHeader = (response.headers && response.headers.get("www-authenticate")) || ""; + return authHeader.split(/\s/)[0].toLowerCase() === "digest"; +} diff --git a/node_modules/webdav/dist/node/auth/index.d.ts b/node_modules/webdav/dist/node/auth/index.d.ts new file mode 100644 index 00000000..195f4f92 --- /dev/null +++ b/node_modules/webdav/dist/node/auth/index.d.ts @@ -0,0 +1,2 @@ +import { OAuthToken, WebDAVClientContext } from "../types.js"; +export declare function setupAuth(context: WebDAVClientContext, username: string, password: string, oauthToken: OAuthToken, ha1: string): void; diff --git a/node_modules/webdav/dist/node/auth/index.js b/node_modules/webdav/dist/node/auth/index.js new file mode 100644 index 00000000..25429e94 --- /dev/null +++ b/node_modules/webdav/dist/node/auth/index.js @@ -0,0 +1,32 @@ +import { Layerr } from "layerr"; +import { createDigestContext } from "./digest.js"; +import { generateBasicAuthHeader } from "./basic.js"; +import { generateTokenAuthHeader } from "./oauth.js"; +import { AuthType, ErrorCode } from "../types.js"; +export function setupAuth(context, username, password, oauthToken, ha1) { + switch (context.authType) { + case AuthType.Auto: + if (username && password) { + context.headers.Authorization = generateBasicAuthHeader(username, password); + } + break; + case AuthType.Digest: + context.digest = createDigestContext(username, password, ha1); + break; + case AuthType.None: + // Do nothing + break; + case AuthType.Password: + context.headers.Authorization = generateBasicAuthHeader(username, password); + break; + case AuthType.Token: + context.headers.Authorization = generateTokenAuthHeader(oauthToken); + break; + default: + throw new Layerr({ + info: { + code: ErrorCode.InvalidAuthType + } + }, `Invalid auth type: ${context.authType}`); + } +} diff --git a/node_modules/webdav/dist/node/auth/oauth.d.ts b/node_modules/webdav/dist/node/auth/oauth.d.ts new file mode 100644 index 00000000..221d43e7 --- /dev/null +++ b/node_modules/webdav/dist/node/auth/oauth.d.ts @@ -0,0 +1,2 @@ +import { AuthHeader, OAuthToken } from "../types.js"; +export declare function generateTokenAuthHeader(token: OAuthToken): AuthHeader; diff --git a/node_modules/webdav/dist/node/auth/oauth.js b/node_modules/webdav/dist/node/auth/oauth.js new file mode 100644 index 00000000..9c79d4dd --- /dev/null +++ b/node_modules/webdav/dist/node/auth/oauth.js @@ -0,0 +1,3 @@ +export function generateTokenAuthHeader(token) { + return `${token.token_type} ${token.access_token}`; +} diff --git a/node_modules/webdav/dist/node/compat/arrayBuffer.d.ts b/node_modules/webdav/dist/node/compat/arrayBuffer.d.ts new file mode 100644 index 00000000..20af4ecb --- /dev/null +++ b/node_modules/webdav/dist/node/compat/arrayBuffer.d.ts @@ -0,0 +1 @@ +export declare function isArrayBuffer(value: any): boolean; diff --git a/node_modules/webdav/dist/node/compat/arrayBuffer.js b/node_modules/webdav/dist/node/compat/arrayBuffer.js new file mode 100644 index 00000000..5051cd3c --- /dev/null +++ b/node_modules/webdav/dist/node/compat/arrayBuffer.js @@ -0,0 +1,7 @@ +const hasArrayBuffer = typeof ArrayBuffer === "function"; +const { toString: objToString } = Object.prototype; +// Taken from: https://github.com/fengyuanchen/is-array-buffer/blob/master/src/index.js +export function isArrayBuffer(value) { + return (hasArrayBuffer && + (value instanceof ArrayBuffer || objToString.call(value) === "[object ArrayBuffer]")); +} diff --git a/node_modules/webdav/dist/node/compat/buffer.d.ts b/node_modules/webdav/dist/node/compat/buffer.d.ts new file mode 100644 index 00000000..d8c2bb91 --- /dev/null +++ b/node_modules/webdav/dist/node/compat/buffer.d.ts @@ -0,0 +1 @@ +export declare function isBuffer(value: any): boolean; diff --git a/node_modules/webdav/dist/node/compat/buffer.js b/node_modules/webdav/dist/node/compat/buffer.js new file mode 100644 index 00000000..0a7d3eb9 --- /dev/null +++ b/node_modules/webdav/dist/node/compat/buffer.js @@ -0,0 +1,6 @@ +export function isBuffer(value) { + return (value != null && + value.constructor != null && + typeof value.constructor.isBuffer === "function" && + value.constructor.isBuffer(value)); +} diff --git a/node_modules/webdav/dist/node/compat/env.d.ts b/node_modules/webdav/dist/node/compat/env.d.ts new file mode 100644 index 00000000..34b65605 --- /dev/null +++ b/node_modules/webdav/dist/node/compat/env.d.ts @@ -0,0 +1,3 @@ +export declare function getDebugBuildName(): string; +export declare function isReactNative(): boolean; +export declare function isWeb(): boolean; diff --git a/node_modules/webdav/dist/node/compat/env.js b/node_modules/webdav/dist/node/compat/env.js new file mode 100644 index 00000000..d6f632cf --- /dev/null +++ b/node_modules/webdav/dist/node/compat/env.js @@ -0,0 +1,12 @@ +export function getDebugBuildName() { + if (typeof TARGET === "string") { + return TARGET; + } + return "node"; +} +export function isReactNative() { + return typeof TARGET === "string" && TARGET === "react-native"; +} +export function isWeb() { + return typeof TARGET === "string" && TARGET === "web"; +} diff --git a/node_modules/webdav/dist/node/compat/patcher.d.ts b/node_modules/webdav/dist/node/compat/patcher.d.ts new file mode 100644 index 00000000..e996b2e2 --- /dev/null +++ b/node_modules/webdav/dist/node/compat/patcher.d.ts @@ -0,0 +1,2 @@ +import { HotPatcher } from "hot-patcher"; +export declare function getPatcher(): HotPatcher; diff --git a/node_modules/webdav/dist/node/compat/patcher.js b/node_modules/webdav/dist/node/compat/patcher.js new file mode 100644 index 00000000..dc1c7e53 --- /dev/null +++ b/node_modules/webdav/dist/node/compat/patcher.js @@ -0,0 +1,8 @@ +import { HotPatcher } from "hot-patcher"; +let __patcher = null; +export function getPatcher() { + if (!__patcher) { + __patcher = new HotPatcher(); + } + return __patcher; +} diff --git a/node_modules/webdav/dist/node/factory.d.ts b/node_modules/webdav/dist/node/factory.d.ts new file mode 100644 index 00000000..83b2bf05 --- /dev/null +++ b/node_modules/webdav/dist/node/factory.d.ts @@ -0,0 +1,2 @@ +import { WebDAVClient, WebDAVClientOptions } from "./types.js"; +export declare function createClient(remoteURL: string, options?: WebDAVClientOptions): WebDAVClient; diff --git a/node_modules/webdav/dist/node/factory.js b/node_modules/webdav/dist/node/factory.js new file mode 100644 index 00000000..76783134 --- /dev/null +++ b/node_modules/webdav/dist/node/factory.js @@ -0,0 +1,69 @@ +import { extractURLPath } from "./tools/url.js"; +import { setupAuth } from "./auth/index.js"; +import { copyFile } from "./operations/copyFile.js"; +import { createDirectory } from "./operations/createDirectory.js"; +import { createReadStream, createWriteStream } from "./operations/createStream.js"; +import { customRequest } from "./operations/customRequest.js"; +import { deleteFile } from "./operations/deleteFile.js"; +import { exists } from "./operations/exists.js"; +import { getDirectoryContents } from "./operations/directoryContents.js"; +import { getFileContents, getFileDownloadLink } from "./operations/getFileContents.js"; +import { lock, unlock } from "./operations/lock.js"; +import { getQuota } from "./operations/getQuota.js"; +import { getStat } from "./operations/stat.js"; +import { getSearch } from "./operations/search.js"; +import { moveFile } from "./operations/moveFile.js"; +import { getFileUploadLink, putFileContents } from "./operations/putFileContents.js"; +import { partialUpdateFileContents } from "./operations/partialUpdateFileContents.js"; +import { getDAVCompliance } from "./operations/getDAVCompliance.js"; +import { AuthType } from "./types.js"; +const DEFAULT_CONTACT_HREF = "https://github.com/perry-mitchell/webdav-client/blob/master/LOCK_CONTACT.md"; +export function createClient(remoteURL, options = {}) { + const { authType: authTypeRaw = null, remoteBasePath, contactHref = DEFAULT_CONTACT_HREF, ha1, headers = {}, httpAgent, httpsAgent, password, token, username, withCredentials } = options; + let authType = authTypeRaw; + if (!authType) { + authType = username || password ? AuthType.Password : AuthType.None; + } + const context = { + authType, + remoteBasePath, + contactHref, + ha1, + headers: Object.assign({}, headers), + httpAgent, + httpsAgent, + password, + remotePath: extractURLPath(remoteURL), + remoteURL, + token, + username, + withCredentials + }; + setupAuth(context, username, password, token, ha1); + return { + copyFile: (filename, destination, options) => copyFile(context, filename, destination, options), + createDirectory: (path, options) => createDirectory(context, path, options), + createReadStream: (filename, options) => createReadStream(context, filename, options), + createWriteStream: (filename, options, callback) => createWriteStream(context, filename, options, callback), + customRequest: (path, requestOptions) => customRequest(context, path, requestOptions), + deleteFile: (filename, options) => deleteFile(context, filename, options), + exists: (path, options) => exists(context, path, options), + getDirectoryContents: (path, options) => getDirectoryContents(context, path, options), + getFileContents: (filename, options) => getFileContents(context, filename, options), + getFileDownloadLink: (filename) => getFileDownloadLink(context, filename), + getFileUploadLink: (filename) => getFileUploadLink(context, filename), + getHeaders: () => Object.assign({}, context.headers), + getQuota: (options) => getQuota(context, options), + lock: (path, options) => lock(context, path, options), + moveFile: (filename, destinationFilename, options) => moveFile(context, filename, destinationFilename, options), + putFileContents: (filename, data, options) => putFileContents(context, filename, data, options), + partialUpdateFileContents: (filePath, start, end, data, options) => partialUpdateFileContents(context, filePath, start, end, data, options), + getDAVCompliance: (path) => getDAVCompliance(context, path), + search: (path, options) => getSearch(context, path, options), + setHeaders: (headers) => { + context.headers = Object.assign({}, headers); + }, + stat: (path, options) => getStat(context, path, options), + unlock: (path, token, options) => unlock(context, path, token, options) + }; +} diff --git a/node_modules/webdav/dist/node/index.d.ts b/node_modules/webdav/dist/node/index.d.ts new file mode 100644 index 00000000..6f52695a --- /dev/null +++ b/node_modules/webdav/dist/node/index.d.ts @@ -0,0 +1,5 @@ +export { createClient } from "./factory.js"; +export { getPatcher } from "./compat/patcher.js"; +export * from "./types.js"; +export { parseStat, parseXML, translateDiskSpace, prepareFileFromProps } from "./tools/dav.js"; +export { processResponsePayload } from "./response.js"; diff --git a/node_modules/webdav/dist/node/index.js b/node_modules/webdav/dist/node/index.js new file mode 100644 index 00000000..6f52695a --- /dev/null +++ b/node_modules/webdav/dist/node/index.js @@ -0,0 +1,5 @@ +export { createClient } from "./factory.js"; +export { getPatcher } from "./compat/patcher.js"; +export * from "./types.js"; +export { parseStat, parseXML, translateDiskSpace, prepareFileFromProps } from "./tools/dav.js"; +export { processResponsePayload } from "./response.js"; diff --git a/node_modules/webdav/dist/node/operations/copyFile.d.ts b/node_modules/webdav/dist/node/operations/copyFile.d.ts new file mode 100644 index 00000000..d0e30ad3 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/copyFile.d.ts @@ -0,0 +1,2 @@ +import { CopyFileOptions, WebDAVClientContext } from "../types.js"; +export declare function copyFile(context: WebDAVClientContext, filename: string, destination: string, options?: CopyFileOptions): Promise; diff --git a/node_modules/webdav/dist/node/operations/copyFile.js b/node_modules/webdav/dist/node/operations/copyFile.js new file mode 100644 index 00000000..acc5cf39 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/copyFile.js @@ -0,0 +1,28 @@ +import { joinURL } from "../tools/url.js"; +import { encodePath } from "../tools/path.js"; +import { request, prepareRequestOptions } from "../request.js"; +import { handleResponseCode } from "../response.js"; +export async function copyFile(context, filename, destination, options = {}) { + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(filename)), + method: "COPY", + headers: { + Destination: joinURL(context.remoteURL, encodePath(destination)), + /** + * From RFC4918 section 10.6: If the overwrite header is not included in a COPY or MOVE request, + * then the resource MUST treat the request as if it has an overwrite header of value "T". + * + * Meaning the overwrite header is always set to "T" EXCEPT the option is explicitly set to false. + */ + Overwrite: options.overwrite === false ? "F" : "T", + /** + * From RFC4918 section 9.8.3: A client may submit a Depth header on a COPY on a collection with a value of "0" + * or "infinity". The COPY method on a collection without a Depth header MUST act as if + * a Depth header with value "infinity" was included. + */ + Depth: options.shallow ? "0" : "infinity" + } + }, context, options); + const response = await request(requestOptions, context); + handleResponseCode(context, response); +} diff --git a/node_modules/webdav/dist/node/operations/createDirectory.d.ts b/node_modules/webdav/dist/node/operations/createDirectory.d.ts new file mode 100644 index 00000000..64a1842f --- /dev/null +++ b/node_modules/webdav/dist/node/operations/createDirectory.d.ts @@ -0,0 +1,2 @@ +import { CreateDirectoryOptions, WebDAVClientContext } from "../types.js"; +export declare function createDirectory(context: WebDAVClientContext, dirPath: string, options?: CreateDirectoryOptions): Promise; diff --git a/node_modules/webdav/dist/node/operations/createDirectory.js b/node_modules/webdav/dist/node/operations/createDirectory.js new file mode 100644 index 00000000..27c7cf85 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/createDirectory.js @@ -0,0 +1,69 @@ +import { joinURL } from "../tools/url.js"; +import { encodePath, getAllDirectories, normalisePath } from "../tools/path.js"; +import { request, prepareRequestOptions } from "../request.js"; +import { handleResponseCode } from "../response.js"; +import { getStat } from "./stat.js"; +export async function createDirectory(context, dirPath, options = {}) { + if (options.recursive === true) + return createDirectoryRecursively(context, dirPath, options); + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, ensureCollectionPath(encodePath(dirPath))), + method: "MKCOL" + }, context, options); + const response = await request(requestOptions, context); + handleResponseCode(context, response); +} +/** + * Ensure the path is a proper "collection" path by ensuring it has a trailing "/". + * The proper format of collection according to the specification does contain the trailing slash. + * http://www.webdav.org/specs/rfc4918.html#rfc.section.5.2 + * @param path Path of the collection + * @return string Path of the collection with appended trailing "/" in case the `path` does not have it. + */ +function ensureCollectionPath(path) { + if (!path.endsWith("/")) { + return path + "/"; + } + return path; +} +async function createDirectoryRecursively(context, dirPath, options = {}) { + const paths = getAllDirectories(normalisePath(dirPath)); + paths.sort((a, b) => { + if (a.length > b.length) { + return 1; + } + else if (b.length > a.length) { + return -1; + } + return 0; + }); + let creating = false; + for (const testPath of paths) { + if (creating) { + await createDirectory(context, testPath, { + ...options, + recursive: false + }); + continue; + } + try { + const testStat = (await getStat(context, testPath)); + if (testStat.type !== "directory") { + throw new Error(`Path includes a file: ${dirPath}`); + } + } + catch (err) { + const error = err; + if (error.status === 404) { + creating = true; + await createDirectory(context, testPath, { + ...options, + recursive: false + }); + } + else { + throw err; + } + } + } +} diff --git a/node_modules/webdav/dist/node/operations/createStream.d.ts b/node_modules/webdav/dist/node/operations/createStream.d.ts new file mode 100644 index 00000000..154d5f5c --- /dev/null +++ b/node_modules/webdav/dist/node/operations/createStream.d.ts @@ -0,0 +1,4 @@ +import Stream from "stream"; +import { CreateReadStreamOptions, CreateWriteStreamCallback, CreateWriteStreamOptions, WebDAVClientContext } from "../types.js"; +export declare function createReadStream(context: WebDAVClientContext, filePath: string, options?: CreateReadStreamOptions): Stream.Readable; +export declare function createWriteStream(context: WebDAVClientContext, filePath: string, options?: CreateWriteStreamOptions, callback?: CreateWriteStreamCallback): Stream.Writable; diff --git a/node_modules/webdav/dist/node/operations/createStream.js b/node_modules/webdav/dist/node/operations/createStream.js new file mode 100644 index 00000000..39106dad --- /dev/null +++ b/node_modules/webdav/dist/node/operations/createStream.js @@ -0,0 +1,74 @@ +import Stream from "stream"; +import { joinURL } from "../tools/url.js"; +import { encodePath } from "../tools/path.js"; +import { request, prepareRequestOptions } from "../request.js"; +import { handleResponseCode } from "../response.js"; +const NOOP = () => { }; +export function createReadStream(context, filePath, options = {}) { + const PassThroughStream = Stream.PassThrough; + const outStream = new PassThroughStream(); + getFileStream(context, filePath, options) + .then(stream => { + stream.pipe(outStream); + }) + .catch(err => { + outStream.emit("error", err); + }); + return outStream; +} +export function createWriteStream(context, filePath, options = {}, callback = NOOP) { + const PassThroughStream = Stream.PassThrough; + const writeStream = new PassThroughStream(); + const headers = {}; + if (options.overwrite === false) { + headers["If-None-Match"] = "*"; + } + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(filePath)), + method: "PUT", + headers, + data: writeStream, + maxRedirects: 0 + }, context, options); + request(requestOptions, context) + .then(response => handleResponseCode(context, response)) + .then(response => { + // Fire callback asynchronously to avoid errors + setTimeout(() => { + callback(response); + }, 0); + }) + .catch(err => { + writeStream.emit("error", err); + }); + return writeStream; +} +async function getFileStream(context, filePath, options = {}) { + const headers = {}; + if (typeof options.range === "object" && typeof options.range.start === "number") { + let rangeHeader = `bytes=${options.range.start}-`; + if (typeof options.range.end === "number") { + rangeHeader = `${rangeHeader}${options.range.end}`; + } + headers.Range = rangeHeader; + } + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(filePath)), + method: "GET", + headers + }, context, options); + const response = await request(requestOptions, context); + handleResponseCode(context, response); + if (headers.Range && response.status !== 206) { + const responseError = new Error(`Invalid response code for partial request: ${response.status}`); + responseError.status = response.status; + throw responseError; + } + if (options.callback) { + setTimeout(() => { + options.callback(response); + }, 0); + } + // @ts-ignore + return response.body; +} diff --git a/node_modules/webdav/dist/node/operations/customRequest.d.ts b/node_modules/webdav/dist/node/operations/customRequest.d.ts new file mode 100644 index 00000000..e3d0c5e2 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/customRequest.d.ts @@ -0,0 +1,2 @@ +import { RequestOptionsCustom, Response, WebDAVClientContext } from "../types.js"; +export declare function customRequest(context: WebDAVClientContext, remotePath: string, requestOptions: RequestOptionsCustom): Promise; diff --git a/node_modules/webdav/dist/node/operations/customRequest.js b/node_modules/webdav/dist/node/operations/customRequest.js new file mode 100644 index 00000000..72cdf01e --- /dev/null +++ b/node_modules/webdav/dist/node/operations/customRequest.js @@ -0,0 +1,13 @@ +import { joinURL } from "../tools/url.js"; +import { encodePath } from "../tools/path.js"; +import { request, prepareRequestOptions } from "../request.js"; +import { handleResponseCode } from "../response.js"; +export async function customRequest(context, remotePath, requestOptions) { + if (!requestOptions.url) { + requestOptions.url = joinURL(context.remoteURL, encodePath(remotePath)); + } + const finalOptions = prepareRequestOptions(requestOptions, context, {}); + const response = await request(finalOptions, context); + handleResponseCode(context, response); + return response; +} diff --git a/node_modules/webdav/dist/node/operations/deleteFile.d.ts b/node_modules/webdav/dist/node/operations/deleteFile.d.ts new file mode 100644 index 00000000..07b1206a --- /dev/null +++ b/node_modules/webdav/dist/node/operations/deleteFile.d.ts @@ -0,0 +1,2 @@ +import { WebDAVClientContext, WebDAVMethodOptions } from "../types.js"; +export declare function deleteFile(context: WebDAVClientContext, filename: string, options?: WebDAVMethodOptions): Promise; diff --git a/node_modules/webdav/dist/node/operations/deleteFile.js b/node_modules/webdav/dist/node/operations/deleteFile.js new file mode 100644 index 00000000..c2b20c34 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/deleteFile.js @@ -0,0 +1,12 @@ +import { joinURL } from "../tools/url.js"; +import { encodePath } from "../tools/path.js"; +import { request, prepareRequestOptions } from "../request.js"; +import { handleResponseCode } from "../response.js"; +export async function deleteFile(context, filename, options = {}) { + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(filename)), + method: "DELETE" + }, context, options); + const response = await request(requestOptions, context); + handleResponseCode(context, response); +} diff --git a/node_modules/webdav/dist/node/operations/directoryContents.d.ts b/node_modules/webdav/dist/node/operations/directoryContents.d.ts new file mode 100644 index 00000000..9da86089 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/directoryContents.d.ts @@ -0,0 +1,2 @@ +import { FileStat, GetDirectoryContentsOptions, ResponseDataDetailed, WebDAVClientContext } from "../types.js"; +export declare function getDirectoryContents(context: WebDAVClientContext, remotePath: string, options?: GetDirectoryContentsOptions): Promise | ResponseDataDetailed>>; diff --git a/node_modules/webdav/dist/node/operations/directoryContents.js b/node_modules/webdav/dist/node/operations/directoryContents.js new file mode 100644 index 00000000..c42809f5 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/directoryContents.js @@ -0,0 +1,54 @@ +import pathPosix from "path-posix"; +import { joinURL, normaliseHREF } from "../tools/url.js"; +import { encodePath, makePathAbsolute, normalisePath } from "../tools/path.js"; +import { parseXML, prepareFileFromProps } from "../tools/dav.js"; +import { request, prepareRequestOptions } from "../request.js"; +import { handleResponseCode, processGlobFilter, processResponsePayload } from "../response.js"; +export async function getDirectoryContents(context, remotePath, options = {}) { + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(remotePath), "/"), + method: "PROPFIND", + headers: { + Accept: "text/plain,application/xml", + Depth: options.deep ? "infinity" : "1" + } + }, context, options); + const response = await request(requestOptions, context); + handleResponseCode(context, response); + const responseData = await response.text(); + if (!responseData) { + throw new Error("Failed parsing directory contents: Empty response"); + } + const davResp = await parseXML(responseData); + const _remotePath = makePathAbsolute(remotePath); + const remoteBasePath = makePathAbsolute(context.remoteBasePath || context.remotePath); + let files = getDirectoryFiles(davResp, remoteBasePath, _remotePath, options.details, options.includeSelf); + if (options.glob) { + files = processGlobFilter(files, options.glob); + } + return processResponsePayload(response, files, options.details); +} +function getDirectoryFiles(result, serverremoteBasePath, requestPath, isDetailed = false, includeSelf = false) { + const serverBase = pathPosix.join(serverremoteBasePath, "/"); + // Extract the response items (directory contents) + const { multistatus: { response: responseItems } } = result; + // Map all items to a consistent output structure (results) + const nodes = responseItems.map(item => { + // HREF is the file path (in full) - The href is already XML entities decoded (e.g. foo&bar is reverted to foo&bar) + const href = normaliseHREF(item.href); + // Each item should contain a stat object + const { propstat: { prop: props } } = item; + // Process the true full filename (minus the base server path) + const filename = serverBase === "/" + ? decodeURIComponent(normalisePath(href)) + : normalisePath(pathPosix.relative(decodeURIComponent(serverBase), decodeURIComponent(href))); + return prepareFileFromProps(props, filename, isDetailed); + }); + // If specified, also return the current directory + if (includeSelf) { + return nodes; + } + // Else, filter out the item pointing to the current directory (not needed) + return nodes.filter(item => item.basename && + (item.type === "file" || item.filename !== requestPath.replace(/\/$/, ""))); +} diff --git a/node_modules/webdav/dist/node/operations/exists.d.ts b/node_modules/webdav/dist/node/operations/exists.d.ts new file mode 100644 index 00000000..79da5213 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/exists.d.ts @@ -0,0 +1,2 @@ +import { WebDAVClientContext, WebDAVMethodOptions } from "../types.js"; +export declare function exists(context: WebDAVClientContext, remotePath: string, options?: WebDAVMethodOptions): Promise; diff --git a/node_modules/webdav/dist/node/operations/exists.js b/node_modules/webdav/dist/node/operations/exists.js new file mode 100644 index 00000000..12095a17 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/exists.js @@ -0,0 +1,13 @@ +import { getStat } from "./stat.js"; +export async function exists(context, remotePath, options = {}) { + try { + await getStat(context, remotePath, options); + return true; + } + catch (err) { + if (err.status === 404) { + return false; + } + throw err; + } +} diff --git a/node_modules/webdav/dist/node/operations/getDAVCompliance.d.ts b/node_modules/webdav/dist/node/operations/getDAVCompliance.d.ts new file mode 100644 index 00000000..a986b7ef --- /dev/null +++ b/node_modules/webdav/dist/node/operations/getDAVCompliance.d.ts @@ -0,0 +1,2 @@ +import { DAVCompliance, WebDAVClientContext, WebDAVMethodOptions } from "../types.js"; +export declare function getDAVCompliance(context: WebDAVClientContext, filePath: string, options?: WebDAVMethodOptions): Promise; diff --git a/node_modules/webdav/dist/node/operations/getDAVCompliance.js b/node_modules/webdav/dist/node/operations/getDAVCompliance.js new file mode 100644 index 00000000..3e0bb1ad --- /dev/null +++ b/node_modules/webdav/dist/node/operations/getDAVCompliance.js @@ -0,0 +1,25 @@ +import { joinURL } from "../tools/url.js"; +import { encodePath } from "../tools/path.js"; +import { request, prepareRequestOptions } from "../request.js"; +import { handleResponseCode } from "../response.js"; +export async function getDAVCompliance(context, filePath, options = {}) { + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(filePath)), + method: "OPTIONS" + }, context, options); + const response = await request(requestOptions, context); + try { + handleResponseCode(context, response); + } + catch (err) { + const error = err; + throw error; + } + const davHeader = response.headers.get("DAV") ?? ""; + const compliance = davHeader.split(",").map(item => item.trim()); + const server = response.headers.get("Server") ?? ""; + return { + compliance, + server + }; +} diff --git a/node_modules/webdav/dist/node/operations/getFileContents.d.ts b/node_modules/webdav/dist/node/operations/getFileContents.d.ts new file mode 100644 index 00000000..60ed2cfa --- /dev/null +++ b/node_modules/webdav/dist/node/operations/getFileContents.d.ts @@ -0,0 +1,3 @@ +import { BufferLike, GetFileContentsOptions, ResponseDataDetailed, WebDAVClientContext } from "../types.js"; +export declare function getFileContents(context: WebDAVClientContext, filePath: string, options?: GetFileContentsOptions): Promise>; +export declare function getFileDownloadLink(context: WebDAVClientContext, filePath: string): string; diff --git a/node_modules/webdav/dist/node/operations/getFileContents.js b/node_modules/webdav/dist/node/operations/getFileContents.js new file mode 100644 index 00000000..7ae155bb --- /dev/null +++ b/node_modules/webdav/dist/node/operations/getFileContents.js @@ -0,0 +1,74 @@ +import { Layerr } from "layerr"; +import { joinURL } from "../tools/url.js"; +import { encodePath } from "../tools/path.js"; +import { fromBase64 } from "../tools/encode.js"; +import { isReactNative, isWeb } from "../compat/env.js"; +import { request, prepareRequestOptions } from "../request.js"; +import { handleResponseCode, processResponsePayload } from "../response.js"; +import { AuthType, ErrorCode } from "../types.js"; +const TRANSFORM_RETAIN_FORMAT = (v) => v; +export async function getFileContents(context, filePath, options = {}) { + const { format = "binary" } = options; + if (format !== "binary" && format !== "text") { + throw new Layerr({ + info: { + code: ErrorCode.InvalidOutputFormat + } + }, `Invalid output format: ${format}`); + } + return format === "text" + ? getFileContentsString(context, filePath, options) + : getFileContentsBuffer(context, filePath, options); +} +async function getFileContentsBuffer(context, filePath, options = {}) { + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(filePath)), + method: "GET" + }, context, options); + const response = await request(requestOptions, context); + handleResponseCode(context, response); + let body; + if (isWeb() || isReactNative()) { + body = await response.arrayBuffer(); + } + else { + body = Buffer.from(await response.arrayBuffer()); + } + return processResponsePayload(response, body, options.details); +} +async function getFileContentsString(context, filePath, options = {}) { + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(filePath)), + method: "GET", + headers: { + Accept: "text/plain" + }, + transformResponse: [TRANSFORM_RETAIN_FORMAT] + }, context, options); + const response = await request(requestOptions, context); + handleResponseCode(context, response); + const body = await response.text(); + return processResponsePayload(response, body, options.details); +} +export function getFileDownloadLink(context, filePath) { + let url = joinURL(context.remoteURL, encodePath(filePath)); + const protocol = /^https:/i.test(url) ? "https" : "http"; + switch (context.authType) { + case AuthType.None: + // Do nothing + break; + case AuthType.Password: { + const authPart = context.headers.Authorization.replace(/^Basic /i, "").trim(); + const authContents = fromBase64(authPart); + url = url.replace(/^https?:\/\//, `${protocol}://${authContents}@`); + break; + } + default: + throw new Layerr({ + info: { + code: ErrorCode.LinkUnsupportedAuthType + } + }, `Unsupported auth type for file link: ${context.authType}`); + } + return url; +} diff --git a/node_modules/webdav/dist/node/operations/getQuota.d.ts b/node_modules/webdav/dist/node/operations/getQuota.d.ts new file mode 100644 index 00000000..e28cac10 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/getQuota.d.ts @@ -0,0 +1,2 @@ +import { DiskQuota, GetQuotaOptions, ResponseDataDetailed, WebDAVClientContext } from "../types.js"; +export declare function getQuota(context: WebDAVClientContext, options?: GetQuotaOptions): Promise>; diff --git a/node_modules/webdav/dist/node/operations/getQuota.js b/node_modules/webdav/dist/node/operations/getQuota.js new file mode 100644 index 00000000..ec507e89 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/getQuota.js @@ -0,0 +1,22 @@ +import { prepareRequestOptions, request } from "../request.js"; +import { handleResponseCode, processResponsePayload } from "../response.js"; +import { parseXML } from "../tools/dav.js"; +import { joinURL } from "../tools/url.js"; +import { parseQuota } from "../tools/quota.js"; +export async function getQuota(context, options = {}) { + const path = options.path || "/"; + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, path), + method: "PROPFIND", + headers: { + Accept: "text/plain,application/xml", + Depth: "0" + } + }, context, options); + const response = await request(requestOptions, context); + handleResponseCode(context, response); + const responseData = await response.text(); + const result = await parseXML(responseData); + const quota = parseQuota(result); + return processResponsePayload(response, quota, options.details); +} diff --git a/node_modules/webdav/dist/node/operations/lock.d.ts b/node_modules/webdav/dist/node/operations/lock.d.ts new file mode 100644 index 00000000..56143668 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/lock.d.ts @@ -0,0 +1,3 @@ +import { LockOptions, LockResponse, WebDAVClientContext, WebDAVMethodOptions } from "../types.js"; +export declare function lock(context: WebDAVClientContext, path: string, options?: LockOptions): Promise; +export declare function unlock(context: WebDAVClientContext, path: string, token: string, options?: WebDAVMethodOptions): Promise; diff --git a/node_modules/webdav/dist/node/operations/lock.js b/node_modules/webdav/dist/node/operations/lock.js new file mode 100644 index 00000000..24a9be5f --- /dev/null +++ b/node_modules/webdav/dist/node/operations/lock.js @@ -0,0 +1,52 @@ +import nestedProp from "nested-property"; +import { joinURL } from "../tools/url.js"; +import { encodePath } from "../tools/path.js"; +import { generateLockXML, parseGenericResponse } from "../tools/xml.js"; +import { request, prepareRequestOptions } from "../request.js"; +import { createErrorFromResponse, handleResponseCode } from "../response.js"; +const DEFAULT_TIMEOUT = "Infinite, Second-4100000000"; +export async function lock(context, path, options = {}) { + const { refreshToken, timeout = DEFAULT_TIMEOUT } = options; + const headers = { + Accept: "text/plain,application/xml", + Timeout: timeout + }; + if (refreshToken) { + headers.If = refreshToken; + } + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(path)), + method: "LOCK", + headers, + data: generateLockXML(context.contactHref) + }, context, options); + const response = await request(requestOptions, context); + handleResponseCode(context, response); + const responseData = await response.text(); + const lockPayload = parseGenericResponse(responseData); + const token = nestedProp.get(lockPayload, "prop.lockdiscovery.activelock.locktoken.href"); + const serverTimeout = nestedProp.get(lockPayload, "prop.lockdiscovery.activelock.timeout"); + if (!token) { + const err = createErrorFromResponse(response, "No lock token received: "); + throw err; + } + return { + token, + serverTimeout + }; +} +export async function unlock(context, path, token, options = {}) { + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(path)), + method: "UNLOCK", + headers: { + "Lock-Token": token + } + }, context, options); + const response = await request(requestOptions, context); + handleResponseCode(context, response); + if (response.status !== 204 && response.status !== 200) { + const err = createErrorFromResponse(response); + throw err; + } +} diff --git a/node_modules/webdav/dist/node/operations/moveFile.d.ts b/node_modules/webdav/dist/node/operations/moveFile.d.ts new file mode 100644 index 00000000..b451d2c0 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/moveFile.d.ts @@ -0,0 +1,2 @@ +import { MoveFileOptions, WebDAVClientContext } from "../types.js"; +export declare function moveFile(context: WebDAVClientContext, filename: string, destination: string, options?: MoveFileOptions): Promise; diff --git a/node_modules/webdav/dist/node/operations/moveFile.js b/node_modules/webdav/dist/node/operations/moveFile.js new file mode 100644 index 00000000..f5844b93 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/moveFile.js @@ -0,0 +1,22 @@ +import { joinURL } from "../tools/url.js"; +import { encodePath } from "../tools/path.js"; +import { request, prepareRequestOptions } from "../request.js"; +import { handleResponseCode } from "../response.js"; +export async function moveFile(context, filename, destination, options = {}) { + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(filename)), + method: "MOVE", + headers: { + Destination: joinURL(context.remoteURL, encodePath(destination)), + /** + * From RFC4918 section 10.6: If the overwrite header is not included in a COPY or MOVE request, + * then the resource MUST treat the request as if it has an overwrite header of value "T". + * + * Meaning the overwrite header is always set to "T" EXCEPT the option is explicitly set to false. + */ + Overwrite: options.overwrite === false ? "F" : "T" + } + }, context, options); + const response = await request(requestOptions, context); + handleResponseCode(context, response); +} diff --git a/node_modules/webdav/dist/node/operations/partialUpdateFileContents.d.ts b/node_modules/webdav/dist/node/operations/partialUpdateFileContents.d.ts new file mode 100644 index 00000000..eaa04d1a --- /dev/null +++ b/node_modules/webdav/dist/node/operations/partialUpdateFileContents.d.ts @@ -0,0 +1,3 @@ +import { Readable } from "stream"; +import { BufferLike, WebDAVMethodOptions, WebDAVClientContext } from "../types.js"; +export declare function partialUpdateFileContents(context: WebDAVClientContext, filePath: string, start: number | null, end: number | null, data: string | BufferLike | Readable, options?: WebDAVMethodOptions): Promise; diff --git a/node_modules/webdav/dist/node/operations/partialUpdateFileContents.js b/node_modules/webdav/dist/node/operations/partialUpdateFileContents.js new file mode 100644 index 00000000..ac50713b --- /dev/null +++ b/node_modules/webdav/dist/node/operations/partialUpdateFileContents.js @@ -0,0 +1,68 @@ +import { Layerr } from "layerr"; +import { joinURL } from "../tools/url.js"; +import { encodePath } from "../tools/path.js"; +import { request, prepareRequestOptions } from "../request.js"; +import { handleResponseCode } from "../response.js"; +import { getDAVCompliance } from "./getDAVCompliance.js"; +import { ErrorCode } from "../types.js"; +export async function partialUpdateFileContents(context, filePath, start, end, data, options = {}) { + const compliance = await getDAVCompliance(context, filePath, options); + if (compliance.compliance.includes("sabredav-partialupdate")) { + return await partialUpdateFileContentsSabredav(context, filePath, start, end, data, options); + } + if (compliance.server.includes("Apache") && + compliance.compliance.includes("")) { + return await partialUpdateFileContentsApache(context, filePath, start, end, data, options); + } + throw new Layerr({ + info: { + code: ErrorCode.NotSupported + } + }, "Not supported"); +} +async function partialUpdateFileContentsSabredav(context, filePath, start, end, data, options = {}) { + if (start > end || start < 0) { + // Actually, SabreDAV support negative start value, + // Do not support here for compatibility with Apache-style way + throw new Layerr({ + info: { + code: ErrorCode.InvalidUpdateRange + } + }, `Invalid update range ${start} for partial update`); + } + const headers = { + "Content-Type": "application/x-sabredav-partialupdate", + "Content-Length": `${end - start + 1}`, + "X-Update-Range": `bytes=${start}-${end}` + }; + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(filePath)), + method: "PATCH", + headers, + data + }, context, options); + const response = await request(requestOptions, context); + handleResponseCode(context, response); +} +async function partialUpdateFileContentsApache(context, filePath, start, end, data, options = {}) { + if (start > end || start < 0) { + throw new Layerr({ + info: { + code: ErrorCode.InvalidUpdateRange + } + }, `Invalid update range ${start} for partial update`); + } + const headers = { + "Content-Type": "application/octet-stream", + "Content-Length": `${end - start + 1}`, + "Content-Range": `bytes ${start}-${end}/*` + }; + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(filePath)), + method: "PUT", + headers, + data + }, context, options); + const response = await request(requestOptions, context); + handleResponseCode(context, response); +} diff --git a/node_modules/webdav/dist/node/operations/putFileContents.d.ts b/node_modules/webdav/dist/node/operations/putFileContents.d.ts new file mode 100644 index 00000000..c2ab479e --- /dev/null +++ b/node_modules/webdav/dist/node/operations/putFileContents.d.ts @@ -0,0 +1,4 @@ +import Stream from "stream"; +import { BufferLike, PutFileContentsOptions, WebDAVClientContext } from "../types.js"; +export declare function putFileContents(context: WebDAVClientContext, filePath: string, data: string | BufferLike | Stream.Readable, options?: PutFileContentsOptions): Promise; +export declare function getFileUploadLink(context: WebDAVClientContext, filePath: string): string; diff --git a/node_modules/webdav/dist/node/operations/putFileContents.js b/node_modules/webdav/dist/node/operations/putFileContents.js new file mode 100644 index 00000000..1f8b4a8d --- /dev/null +++ b/node_modules/webdav/dist/node/operations/putFileContents.js @@ -0,0 +1,77 @@ +import { Layerr } from "layerr"; +import Stream from "stream"; +import { fromBase64 } from "../tools/encode.js"; +import { joinURL } from "../tools/url.js"; +import { encodePath } from "../tools/path.js"; +import { calculateDataLength } from "../tools/size.js"; +import { isReactNative, isWeb } from "../compat/env.js"; +import { request, prepareRequestOptions } from "../request.js"; +import { handleResponseCode } from "../response.js"; +import { AuthType, ErrorCode } from "../types.js"; +export async function putFileContents(context, filePath, data, options = {}) { + const { contentLength = true, overwrite = true } = options; + const headers = { + "Content-Type": "application/octet-stream" + }; + if (!isWeb() && + !isReactNative() && + typeof Stream !== "undefined" && + typeof Stream?.Readable !== "undefined" && + data instanceof Stream.Readable) { + // Skip, no content-length + } + else if (contentLength === false) { + // Skip, disabled + } + else if (typeof contentLength === "number") { + headers["Content-Length"] = `${contentLength}`; + } + else { + headers["Content-Length"] = `${calculateDataLength(data)}`; + } + if (!overwrite) { + headers["If-None-Match"] = "*"; + } + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(filePath)), + method: "PUT", + headers, + data + }, context, options); + const response = await request(requestOptions, context); + try { + handleResponseCode(context, response); + } + catch (err) { + const error = err; + if (error.status === 412 && !overwrite) { + return false; + } + else { + throw error; + } + } + return true; +} +export function getFileUploadLink(context, filePath) { + let url = `${joinURL(context.remoteURL, encodePath(filePath))}?Content-Type=application/octet-stream`; + const protocol = /^https:/i.test(url) ? "https" : "http"; + switch (context.authType) { + case AuthType.None: + // Do nothing + break; + case AuthType.Password: { + const authPart = context.headers.Authorization.replace(/^Basic /i, "").trim(); + const authContents = fromBase64(authPart); + url = url.replace(/^https?:\/\//, `${protocol}://${authContents}@`); + break; + } + default: + throw new Layerr({ + info: { + code: ErrorCode.LinkUnsupportedAuthType + } + }, `Unsupported auth type for file link: ${context.authType}`); + } + return url; +} diff --git a/node_modules/webdav/dist/node/operations/search.d.ts b/node_modules/webdav/dist/node/operations/search.d.ts new file mode 100644 index 00000000..98491633 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/search.d.ts @@ -0,0 +1,2 @@ +import { SearchResult, ResponseDataDetailed, SearchOptions, WebDAVClientContext } from "../types.js"; +export declare function getSearch(context: WebDAVClientContext, searchArbiter: string, options?: SearchOptions): Promise>; diff --git a/node_modules/webdav/dist/node/operations/search.js b/node_modules/webdav/dist/node/operations/search.js new file mode 100644 index 00000000..ef5589e0 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/search.js @@ -0,0 +1,23 @@ +import { parseSearch, parseXML } from "../tools/dav.js"; +import { joinURL } from "../tools/url.js"; +import { encodePath } from "../tools/path.js"; +import { request, prepareRequestOptions } from "../request.js"; +import { handleResponseCode, processResponsePayload } from "../response.js"; +export async function getSearch(context, searchArbiter, options = {}) { + const { details: isDetailed = false } = options; + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(searchArbiter)), + method: "SEARCH", + headers: { + Accept: "text/plain,application/xml", + // Ensure a Content-Type header is set was this is required by e.g. sabre/dav + "Content-Type": context.headers["Content-Type"] || "application/xml; charset=utf-8" + } + }, context, options); + const response = await request(requestOptions, context); + handleResponseCode(context, response); + const responseText = await response.text(); + const responseData = await parseXML(responseText); + const results = parseSearch(responseData, searchArbiter, isDetailed); + return processResponsePayload(response, results, isDetailed); +} diff --git a/node_modules/webdav/dist/node/operations/stat.d.ts b/node_modules/webdav/dist/node/operations/stat.d.ts new file mode 100644 index 00000000..c4766554 --- /dev/null +++ b/node_modules/webdav/dist/node/operations/stat.d.ts @@ -0,0 +1,2 @@ +import { FileStat, ResponseDataDetailed, StatOptions, WebDAVClientContext } from "../types.js"; +export declare function getStat(context: WebDAVClientContext, filename: string, options?: StatOptions): Promise>; diff --git a/node_modules/webdav/dist/node/operations/stat.js b/node_modules/webdav/dist/node/operations/stat.js new file mode 100644 index 00000000..2f5e636b --- /dev/null +++ b/node_modules/webdav/dist/node/operations/stat.js @@ -0,0 +1,22 @@ +import { parseStat, parseXML } from "../tools/dav.js"; +import { joinURL } from "../tools/url.js"; +import { encodePath } from "../tools/path.js"; +import { request, prepareRequestOptions } from "../request.js"; +import { handleResponseCode, processResponsePayload } from "../response.js"; +export async function getStat(context, filename, options = {}) { + const { details: isDetailed = false } = options; + const requestOptions = prepareRequestOptions({ + url: joinURL(context.remoteURL, encodePath(filename)), + method: "PROPFIND", + headers: { + Accept: "text/plain,application/xml", + Depth: "0" + } + }, context, options); + const response = await request(requestOptions, context); + handleResponseCode(context, response); + const responseData = await response.text(); + const result = await parseXML(responseData); + const stat = parseStat(result, filename, isDetailed); + return processResponsePayload(response, stat, isDetailed); +} diff --git a/node_modules/webdav/dist/node/request.d.ts b/node_modules/webdav/dist/node/request.d.ts new file mode 100644 index 00000000..8506e8da --- /dev/null +++ b/node_modules/webdav/dist/node/request.d.ts @@ -0,0 +1,3 @@ +import { RequestOptionsCustom, RequestOptionsWithState, Response, WebDAVClientContext, WebDAVMethodOptions } from "./types.js"; +export declare function prepareRequestOptions(requestOptions: RequestOptionsCustom | RequestOptionsWithState, context: WebDAVClientContext, userOptions: WebDAVMethodOptions): RequestOptionsWithState; +export declare function request(requestOptions: RequestOptionsWithState, context: WebDAVClientContext): Promise; diff --git a/node_modules/webdav/dist/node/request.js b/node_modules/webdav/dist/node/request.js new file mode 100644 index 00000000..a78fd84d --- /dev/null +++ b/node_modules/webdav/dist/node/request.js @@ -0,0 +1,133 @@ +import { Agent as HTTPAgent } from "http"; +import { Agent as HTTPSAgent } from "https"; +import { fetch } from "@buttercup/fetch"; +import { getPatcher } from "./compat/patcher.js"; +import { isReactNative, isWeb } from "./compat/env.js"; +import { generateDigestAuthHeader, parseDigestAuth, responseIndicatesDigestAuth } from "./auth/digest.js"; +import { cloneShallow, merge } from "./tools/merge.js"; +import { mergeHeaders } from "./tools/headers.js"; +import { requestDataToFetchBody } from "./tools/body.js"; +import { AuthType } from "./types.js"; +import { setupAuth } from "./auth/index.js"; +function getFetchOptions(requestOptions) { + let headers = {}; + // Handle standard options + const opts = { + method: requestOptions.method + }; + if (requestOptions.headers) { + headers = mergeHeaders(headers, requestOptions.headers); + } + if (typeof requestOptions.data !== "undefined") { + const [body, newHeaders] = requestDataToFetchBody(requestOptions.data); + opts.body = body; + headers = mergeHeaders(headers, newHeaders); + } + if (requestOptions.signal) { + opts.signal = requestOptions.signal; + } + if (requestOptions.withCredentials) { + opts.credentials = "include"; + } + // Check for node-specific options + if (!isWeb() && !isReactNative()) { + if (requestOptions.httpAgent || requestOptions.httpsAgent) { + opts.agent = (parsedURL) => { + if (parsedURL.protocol === "http:") { + return requestOptions.httpAgent || new HTTPAgent(); + } + return requestOptions.httpsAgent || new HTTPSAgent(); + }; + } + } + // Attach headers + opts.headers = headers; + return opts; +} +export function prepareRequestOptions(requestOptions, context, userOptions) { + const finalOptions = cloneShallow(requestOptions); + finalOptions.headers = mergeHeaders(context.headers, finalOptions.headers || {}, userOptions.headers || {}); + if (typeof userOptions.data !== "undefined") { + finalOptions.data = userOptions.data; + } + if (userOptions.signal) { + finalOptions.signal = userOptions.signal; + } + if (context.httpAgent) { + finalOptions.httpAgent = context.httpAgent; + } + if (context.httpsAgent) { + finalOptions.httpsAgent = context.httpsAgent; + } + if (context.digest) { + finalOptions._digest = context.digest; + } + if (typeof context.withCredentials === "boolean") { + finalOptions.withCredentials = context.withCredentials; + } + return finalOptions; +} +export async function request(requestOptions, context) { + if (context.authType === AuthType.Auto) { + return requestAuto(requestOptions, context); + } + if (requestOptions._digest) { + return requestDigest(requestOptions); + } + return requestStandard(requestOptions); +} +async function requestAuto(requestOptions, context) { + const response = await requestStandard(requestOptions); + if (response.ok) { + context.authType = AuthType.Password; + return response; + } + if (response.status == 401 && responseIndicatesDigestAuth(response)) { + context.authType = AuthType.Digest; + setupAuth(context, context.username, context.password, undefined, undefined); + requestOptions._digest = context.digest; + return requestDigest(requestOptions); + } + return response; +} +async function requestDigest(requestOptions) { + // Remove client's digest authentication object from request options + const _digest = requestOptions._digest; + delete requestOptions._digest; + // If client is already using digest authentication, include the digest authorization header + if (_digest.hasDigestAuth) { + requestOptions = merge(requestOptions, { + headers: { + Authorization: generateDigestAuthHeader(requestOptions, _digest) + } + }); + } + // Perform digest request + check + const response = await requestStandard(requestOptions); + if (response.status == 401) { + _digest.hasDigestAuth = parseDigestAuth(response, _digest); + if (_digest.hasDigestAuth) { + requestOptions = merge(requestOptions, { + headers: { + Authorization: generateDigestAuthHeader(requestOptions, _digest) + } + }); + const response2 = await requestStandard(requestOptions); + if (response2.status == 401) { + _digest.hasDigestAuth = false; + } + else { + _digest.nc++; + } + return response2; + } + } + else { + _digest.nc++; + } + return response; +} +function requestStandard(requestOptions) { + const patcher = getPatcher(); + return patcher.patchInline("request", (options) => patcher.patchInline("fetch", fetch, options.url, getFetchOptions(options)), requestOptions); +} diff --git a/node_modules/webdav/dist/node/response.d.ts b/node_modules/webdav/dist/node/response.d.ts new file mode 100644 index 00000000..0b90f530 --- /dev/null +++ b/node_modules/webdav/dist/node/response.d.ts @@ -0,0 +1,16 @@ +import { FileStat, Response, ResponseDataDetailed, WebDAVClientContext } from "./types.js"; +export declare function createErrorFromResponse(response: Response, prefix?: string): Error; +export declare function handleResponseCode(context: WebDAVClientContext, response: Response): Response; +export declare function processGlobFilter(files: Array, glob: string): Array; +/** + * Process a response payload (eg. from `customRequest`) and + * prepare it for further processing. Exposed for custom + * request handling. + * @param response The response for a request + * @param data The data returned + * @param isDetailed Whether or not a detailed result is + * requested + * @returns The response data, or a detailed response object + * if required + */ +export declare function processResponsePayload(response: Response, data: T, isDetailed?: boolean): ResponseDataDetailed | T; diff --git a/node_modules/webdav/dist/node/response.js b/node_modules/webdav/dist/node/response.js new file mode 100644 index 00000000..40cfb11f --- /dev/null +++ b/node_modules/webdav/dist/node/response.js @@ -0,0 +1,42 @@ +import { minimatch } from "minimatch"; +import { convertResponseHeaders } from "./tools/headers.js"; +export function createErrorFromResponse(response, prefix = "") { + const err = new Error(`${prefix}Invalid response: ${response.status} ${response.statusText}`); + err.status = response.status; + err.response = response; + return err; +} +export function handleResponseCode(context, response) { + const { status } = response; + if (status === 401 && context.digest) + return response; + if (status >= 400) { + const err = createErrorFromResponse(response); + throw err; + } + return response; +} +export function processGlobFilter(files, glob) { + return files.filter(file => minimatch(file.filename, glob, { matchBase: true })); +} +/** + * Process a response payload (eg. from `customRequest`) and + * prepare it for further processing. Exposed for custom + * request handling. + * @param response The response for a request + * @param data The data returned + * @param isDetailed Whether or not a detailed result is + * requested + * @returns The response data, or a detailed response object + * if required + */ +export function processResponsePayload(response, data, isDetailed = false) { + return isDetailed + ? { + data, + headers: response.headers ? convertResponseHeaders(response.headers) : {}, + status: response.status, + statusText: response.statusText + } + : data; +} diff --git a/node_modules/webdav/dist/node/tools/body.d.ts b/node_modules/webdav/dist/node/tools/body.d.ts new file mode 100644 index 00000000..913d2a59 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/body.d.ts @@ -0,0 +1,2 @@ +import { Headers, RequestDataPayload } from "../types.js"; +export declare function requestDataToFetchBody(data: RequestDataPayload): [BodyInit, Headers]; diff --git a/node_modules/webdav/dist/node/tools/body.js b/node_modules/webdav/dist/node/tools/body.js new file mode 100644 index 00000000..a7de5415 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/body.js @@ -0,0 +1,28 @@ +import Stream from "stream"; +import { isArrayBuffer } from "../compat/arrayBuffer.js"; +import { isBuffer } from "../compat/buffer.js"; +import { isReactNative, isWeb } from "../compat/env.js"; +export function requestDataToFetchBody(data) { + if (!isWeb() && !isReactNative() && data instanceof Stream.Readable) { + // @ts-ignore + return [data, {}]; + } + if (typeof data === "string") { + return [data, {}]; + } + else if (isBuffer(data)) { + return [data, {}]; + } + else if (isArrayBuffer(data)) { + return [data, {}]; + } + else if (data && typeof data === "object") { + return [ + JSON.stringify(data), + { + "content-type": "application/json" + } + ]; + } + throw new Error(`Unable to convert request body: Unexpected body type: ${typeof data}`); +} diff --git a/node_modules/webdav/dist/node/tools/crypto.d.ts b/node_modules/webdav/dist/node/tools/crypto.d.ts new file mode 100644 index 00000000..e0f26b81 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/crypto.d.ts @@ -0,0 +1 @@ +export declare function ha1Compute(algorithm: string, user: string, realm: string, pass: string, nonce: string, cnonce: string, ha1: string): string; diff --git a/node_modules/webdav/dist/node/tools/crypto.js b/node_modules/webdav/dist/node/tools/crypto.js new file mode 100644 index 00000000..9c1dbcf0 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/crypto.js @@ -0,0 +1,8 @@ +import md5 from "md5"; +export function ha1Compute(algorithm, user, realm, pass, nonce, cnonce, ha1) { + const ha1Hash = ha1 || md5(`${user}:${realm}:${pass}`); + if (algorithm && algorithm.toLowerCase() === "md5-sess") { + return md5(`${ha1Hash}:${nonce}:${cnonce}`); + } + return ha1Hash; +} diff --git a/node_modules/webdav/dist/node/tools/dav.d.ts b/node_modules/webdav/dist/node/tools/dav.d.ts new file mode 100644 index 00000000..21c03d3c --- /dev/null +++ b/node_modules/webdav/dist/node/tools/dav.d.ts @@ -0,0 +1,40 @@ +import { DAVResult, DAVResultResponseProps, DiskQuotaAvailable, FileStat, SearchResult } from "../types.js"; +/** + * Parse an XML response from a WebDAV service, + * converting it to an internal DAV result + * @param xml The raw XML string + * @returns A parsed and processed DAV result + */ +export declare function parseXML(xml: string): Promise; +/** + * Get a file stat result from given DAV properties + * @param props DAV properties + * @param filename The filename for the file stat + * @param isDetailed Whether or not the raw props of the resource should be returned + * @returns A file stat result + */ +export declare function prepareFileFromProps(props: DAVResultResponseProps, filename: string, isDetailed?: boolean): FileStat; +/** + * Parse a DAV result for file stats + * @param result The resulting DAV response + * @param filename The filename that was stat'd + * @param isDetailed Whether or not the raw props of + * the resource should be returned + * @returns A file stat result + */ +export declare function parseStat(result: DAVResult, filename: string, isDetailed?: boolean): FileStat; +/** + * Parse a DAV result for a search request + * + * @param result The resulting DAV response + * @param searchArbiter The collection path that was searched + * @param isDetailed Whether or not the raw props of the resource should be returned + */ +export declare function parseSearch(result: DAVResult, searchArbiter: string, isDetailed: boolean): SearchResult; +/** + * Translate a disk quota indicator to a recognised + * value (includes "unlimited" and "unknown") + * @param value The quota indicator, eg. "-3" + * @returns The value in bytes, or another indicator + */ +export declare function translateDiskSpace(value: string | number): DiskQuotaAvailable; diff --git a/node_modules/webdav/dist/node/tools/dav.js b/node_modules/webdav/dist/node/tools/dav.js new file mode 100644 index 00000000..f6a353b1 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/dav.js @@ -0,0 +1,205 @@ +import path from "path-posix"; +import { XMLParser } from "fast-xml-parser"; +import nestedProp from "nested-property"; +import { encodePath, normalisePath } from "./path.js"; +var PropertyType; +(function (PropertyType) { + PropertyType["Array"] = "array"; + PropertyType["Object"] = "object"; + PropertyType["Original"] = "original"; +})(PropertyType || (PropertyType = {})); +function getParser() { + return new XMLParser({ + allowBooleanAttributes: true, + attributeNamePrefix: "", + textNodeName: "text", + ignoreAttributes: false, + removeNSPrefix: true, + numberParseOptions: { + hex: true, + leadingZeros: false + }, + attributeValueProcessor(attrName, attrValue, jPath) { + // handle boolean attributes + if (attrValue === "true" || attrValue === "false") { + return attrValue === "true"; + } + return attrValue; + }, + tagValueProcessor(tagName, tagValue, jPath) { + if (jPath.endsWith("propstat.prop.displayname")) { + // Do not parse the display name, because this causes e.g. '2024.10' to result in number 2024.1 + return; + } + return tagValue; + } + // We don't use the processors here as decoding is done manually + // later on - decoding early would break some path checks. + }); +} +function getPropertyOfType(obj, prop, type = PropertyType.Original) { + const val = nestedProp.get(obj, prop); + if (type === "array" && Array.isArray(val) === false) { + return [val]; + } + else if (type === "object" && Array.isArray(val)) { + return val[0]; + } + return val; +} +function normaliseResponse(response) { + const output = Object.assign({}, response); + // Only either status OR propstat is allowed + if (output.status) { + nestedProp.set(output, "status", getPropertyOfType(output, "status", PropertyType.Object)); + } + else { + nestedProp.set(output, "propstat", getPropertyOfType(output, "propstat", PropertyType.Object)); + nestedProp.set(output, "propstat.prop", getPropertyOfType(output, "propstat.prop", PropertyType.Object)); + } + return output; +} +function normaliseResult(result) { + const { multistatus } = result; + if (multistatus === "") { + return { + multistatus: { + response: [] + } + }; + } + if (!multistatus) { + throw new Error("Invalid response: No root multistatus found"); + } + const output = { + multistatus: Array.isArray(multistatus) ? multistatus[0] : multistatus + }; + nestedProp.set(output, "multistatus.response", getPropertyOfType(output, "multistatus.response", PropertyType.Array)); + nestedProp.set(output, "multistatus.response", nestedProp.get(output, "multistatus.response").map(response => normaliseResponse(response))); + return output; +} +/** + * Parse an XML response from a WebDAV service, + * converting it to an internal DAV result + * @param xml The raw XML string + * @returns A parsed and processed DAV result + */ +export function parseXML(xml) { + return new Promise(resolve => { + const result = getParser().parse(xml); + resolve(normaliseResult(result)); + }); +} +/** + * Get a file stat result from given DAV properties + * @param props DAV properties + * @param filename The filename for the file stat + * @param isDetailed Whether or not the raw props of the resource should be returned + * @returns A file stat result + */ +export function prepareFileFromProps(props, filename, isDetailed = false) { + // Last modified time, raw size, item type and mime + const { getlastmodified: lastMod = null, getcontentlength: rawSize = "0", resourcetype: resourceType = null, getcontenttype: mimeType = null, getetag: etag = null } = props; + const type = resourceType && + typeof resourceType === "object" && + typeof resourceType.collection !== "undefined" + ? "directory" + : "file"; + const stat = { + filename, + basename: path.basename(filename), + lastmod: lastMod, + size: parseInt(rawSize, 10), + type, + etag: typeof etag === "string" ? etag.replace(/"/g, "") : null + }; + if (type === "file") { + stat.mime = mimeType && typeof mimeType === "string" ? mimeType.split(";")[0] : ""; + } + if (isDetailed) { + // The XML parser tries to interpret values, but the display name is required to be a string + if (typeof props.displayname !== "undefined") { + props.displayname = String(props.displayname); + } + stat.props = props; + } + return stat; +} +/** + * Parse a DAV result for file stats + * @param result The resulting DAV response + * @param filename The filename that was stat'd + * @param isDetailed Whether or not the raw props of + * the resource should be returned + * @returns A file stat result + */ +export function parseStat(result, filename, isDetailed = false) { + let responseItem = null; + try { + // should be a propstat response, if not the if below will throw an error + if (result.multistatus.response[0].propstat) { + responseItem = result.multistatus.response[0]; + } + } + catch (e) { + /* ignore */ + } + if (!responseItem) { + throw new Error("Failed getting item stat: bad response"); + } + const { propstat: { prop: props, status: statusLine } } = responseItem; + // As defined in https://tools.ietf.org/html/rfc2068#section-6.1 + const [_, statusCodeStr, statusText] = statusLine.split(" ", 3); + const statusCode = parseInt(statusCodeStr, 10); + if (statusCode >= 400) { + const err = new Error(`Invalid response: ${statusCode} ${statusText}`); + err.status = statusCode; + throw err; + } + const filePath = normalisePath(filename); + return prepareFileFromProps(props, filePath, isDetailed); +} +/** + * Parse a DAV result for a search request + * + * @param result The resulting DAV response + * @param searchArbiter The collection path that was searched + * @param isDetailed Whether or not the raw props of the resource should be returned + */ +export function parseSearch(result, searchArbiter, isDetailed) { + const response = { + truncated: false, + results: [] + }; + response.truncated = result.multistatus.response.some(v => { + return ((v.status || v.propstat?.status).split(" ", 3)?.[1] === "507" && + v.href.replace(/\/$/, "").endsWith(encodePath(searchArbiter).replace(/\/$/, ""))); + }); + result.multistatus.response.forEach(result => { + if (result.propstat === undefined) { + return; + } + const filename = result.href.split("/").map(decodeURIComponent).join("/"); + response.results.push(prepareFileFromProps(result.propstat.prop, filename, isDetailed)); + }); + return response; +} +/** + * Translate a disk quota indicator to a recognised + * value (includes "unlimited" and "unknown") + * @param value The quota indicator, eg. "-3" + * @returns The value in bytes, or another indicator + */ +export function translateDiskSpace(value) { + switch (String(value)) { + case "-3": + return "unlimited"; + case "-2": + /* falls-through */ + case "-1": + // -1 is non-computed + return "unknown"; + default: + return parseInt(String(value), 10); + } +} diff --git a/node_modules/webdav/dist/node/tools/encode.d.ts b/node_modules/webdav/dist/node/tools/encode.d.ts new file mode 100644 index 00000000..8b1faf64 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/encode.d.ts @@ -0,0 +1,3 @@ +export declare function decodeHTMLEntities(text: string): string; +export declare function fromBase64(text: string): string; +export declare function toBase64(text: string): string; diff --git a/node_modules/webdav/dist/node/tools/encode.js b/node_modules/webdav/dist/node/tools/encode.js new file mode 100644 index 00000000..789dbfc6 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/encode.js @@ -0,0 +1,17 @@ +import base64 from "base-64"; +import { decodeHTML } from "entities"; +import { isWeb } from "../compat/env.js"; +export function decodeHTMLEntities(text) { + if (isWeb()) { + const txt = document.createElement("textarea"); + txt.innerHTML = text; + return txt.value; + } + return decodeHTML(text); +} +export function fromBase64(text) { + return base64.decode(text); +} +export function toBase64(text) { + return base64.encode(text); +} diff --git a/node_modules/webdav/dist/node/tools/headers.d.ts b/node_modules/webdav/dist/node/tools/headers.d.ts new file mode 100644 index 00000000..7413754d --- /dev/null +++ b/node_modules/webdav/dist/node/tools/headers.d.ts @@ -0,0 +1,4 @@ +import { Headers } from "@buttercup/fetch"; +import { Headers as HeadersSimple } from "../types.js"; +export declare function convertResponseHeaders(headers: Headers): HeadersSimple; +export declare function mergeHeaders(...headerPayloads: HeadersSimple[]): HeadersSimple; diff --git a/node_modules/webdav/dist/node/tools/headers.js b/node_modules/webdav/dist/node/tools/headers.js new file mode 100644 index 00000000..584e647c --- /dev/null +++ b/node_modules/webdav/dist/node/tools/headers.js @@ -0,0 +1,25 @@ +export function convertResponseHeaders(headers) { + const output = {}; + for (const key of headers.keys()) { + output[key] = headers.get(key); + } + return output; +} +export function mergeHeaders(...headerPayloads) { + if (headerPayloads.length === 0) + return {}; + const headerKeys = {}; + return headerPayloads.reduce((output, headers) => { + Object.keys(headers).forEach(header => { + const lowerHeader = header.toLowerCase(); + if (headerKeys.hasOwnProperty(lowerHeader)) { + output[headerKeys[lowerHeader]] = headers[header]; + } + else { + headerKeys[lowerHeader] = header; + output[header] = headers[header]; + } + }); + return output; + }, {}); +} diff --git a/node_modules/webdav/dist/node/tools/merge.d.ts b/node_modules/webdav/dist/node/tools/merge.d.ts new file mode 100644 index 00000000..a42e03d1 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/merge.d.ts @@ -0,0 +1,2 @@ +export declare function cloneShallow(obj: T): T; +export declare function merge(...args: Object[]): any; diff --git a/node_modules/webdav/dist/node/tools/merge.js b/node_modules/webdav/dist/node/tools/merge.js new file mode 100644 index 00000000..52f662c5 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/merge.js @@ -0,0 +1,59 @@ +export function cloneShallow(obj) { + return isPlainObject(obj) + ? Object.assign({}, obj) + : Object.setPrototypeOf(Object.assign({}, obj), Object.getPrototypeOf(obj)); +} +function isPlainObject(obj) { + if (typeof obj !== "object" || + obj === null || + Object.prototype.toString.call(obj) != "[object Object]") { + // Not an object + return false; + } + if (Object.getPrototypeOf(obj) === null) { + return true; + } + let proto = obj; + // Find the prototype + while (Object.getPrototypeOf(proto) !== null) { + proto = Object.getPrototypeOf(proto); + } + return Object.getPrototypeOf(obj) === proto; +} +export function merge(...args) { + let output = null, items = [...args]; + while (items.length > 0) { + const nextItem = items.shift(); + if (!output) { + output = cloneShallow(nextItem); + } + else { + output = mergeObjects(output, nextItem); + } + } + return output; +} +function mergeObjects(obj1, obj2) { + const output = cloneShallow(obj1); + Object.keys(obj2).forEach(key => { + if (!output.hasOwnProperty(key)) { + output[key] = obj2[key]; + return; + } + if (Array.isArray(obj2[key])) { + output[key] = Array.isArray(output[key]) + ? [...output[key], ...obj2[key]] + : [...obj2[key]]; + } + else if (typeof obj2[key] === "object" && !!obj2[key]) { + output[key] = + typeof output[key] === "object" && !!output[key] + ? mergeObjects(output[key], obj2[key]) + : cloneShallow(obj2[key]); + } + else { + output[key] = obj2[key]; + } + }); + return output; +} diff --git a/node_modules/webdav/dist/node/tools/path.d.ts b/node_modules/webdav/dist/node/tools/path.d.ts new file mode 100644 index 00000000..ac2290bd --- /dev/null +++ b/node_modules/webdav/dist/node/tools/path.d.ts @@ -0,0 +1,4 @@ +export declare function encodePath(filePath: string): string; +export declare function getAllDirectories(directory: string): Array; +export declare function makePathAbsolute(pathStr: string): string; +export declare function normalisePath(pathStr: string): string; diff --git a/node_modules/webdav/dist/node/tools/path.js b/node_modules/webdav/dist/node/tools/path.js new file mode 100644 index 00000000..8bf94537 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/path.js @@ -0,0 +1,38 @@ +import { Layerr } from "layerr"; +import path from "path-posix"; +const SEP_PATH_POSIX = "__PATH_SEPARATOR_POSIX__"; +const SEP_PATH_WINDOWS = "__PATH_SEPARATOR_WINDOWS__"; +export function encodePath(filePath) { + try { + const replaced = filePath.replace(/\//g, SEP_PATH_POSIX).replace(/\\\\/g, SEP_PATH_WINDOWS); + const formatted = encodeURIComponent(replaced); + return formatted.split(SEP_PATH_WINDOWS).join("\\\\").split(SEP_PATH_POSIX).join("/"); + } + catch (err) { + throw new Layerr(err, "Failed encoding path"); + } +} +export function getAllDirectories(directory) { + if (!directory || directory === "/") + return []; + let currentPath = directory; + const output = []; + do { + output.push(currentPath); + currentPath = path.dirname(currentPath); + } while (currentPath && currentPath !== "/"); + return output; +} +export function makePathAbsolute(pathStr) { + return pathStr.startsWith("/") ? pathStr : "/" + pathStr; +} +export function normalisePath(pathStr) { + let normalisedPath = pathStr; + if (normalisedPath[0] !== "/") { + normalisedPath = "/" + normalisedPath; + } + if (/^.+\/$/.test(normalisedPath)) { + normalisedPath = normalisedPath.substr(0, normalisedPath.length - 1); + } + return normalisedPath; +} diff --git a/node_modules/webdav/dist/node/tools/quota.d.ts b/node_modules/webdav/dist/node/tools/quota.d.ts new file mode 100644 index 00000000..3b582f55 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/quota.d.ts @@ -0,0 +1,2 @@ +import { DAVResult, DiskQuota } from "../types.js"; +export declare function parseQuota(result: DAVResult): DiskQuota | null; diff --git a/node_modules/webdav/dist/node/tools/quota.js b/node_modules/webdav/dist/node/tools/quota.js new file mode 100644 index 00000000..7ab65789 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/quota.js @@ -0,0 +1,18 @@ +import { translateDiskSpace } from "./dav.js"; +export function parseQuota(result) { + try { + const [responseItem] = result.multistatus.response; + const { propstat: { prop: { "quota-used-bytes": quotaUsed, "quota-available-bytes": quotaAvail } } } = responseItem; + return typeof quotaUsed !== "undefined" && typeof quotaAvail !== "undefined" + ? { + // As it could be both a string or a number ensure we are working with a number + used: parseInt(String(quotaUsed), 10), + available: translateDiskSpace(quotaAvail) + } + : null; + } + catch (err) { + /* ignore */ + } + return null; +} diff --git a/node_modules/webdav/dist/node/tools/size.d.ts b/node_modules/webdav/dist/node/tools/size.d.ts new file mode 100644 index 00000000..9962796d --- /dev/null +++ b/node_modules/webdav/dist/node/tools/size.d.ts @@ -0,0 +1,2 @@ +import { BufferLike } from "../types.js"; +export declare function calculateDataLength(data: string | BufferLike): number; diff --git a/node_modules/webdav/dist/node/tools/size.js b/node_modules/webdav/dist/node/tools/size.js new file mode 100644 index 00000000..344f1863 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/size.js @@ -0,0 +1,21 @@ +import { Layerr } from "layerr"; +import { byteLength } from "byte-length"; +import { isArrayBuffer } from "../compat/arrayBuffer.js"; +import { isBuffer } from "../compat/buffer.js"; +import { ErrorCode } from "../types.js"; +export function calculateDataLength(data) { + if (isArrayBuffer(data)) { + return data.byteLength; + } + else if (isBuffer(data)) { + return data.length; + } + else if (typeof data === "string") { + return byteLength(data); + } + throw new Layerr({ + info: { + code: ErrorCode.DataTypeNoLength + } + }, "Cannot calculate data length: Invalid type"); +} diff --git a/node_modules/webdav/dist/node/tools/url.d.ts b/node_modules/webdav/dist/node/tools/url.d.ts new file mode 100644 index 00000000..ed482109 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/url.d.ts @@ -0,0 +1,3 @@ +export declare function extractURLPath(fullURL: string): string; +export declare function joinURL(...parts: Array): string; +export declare function normaliseHREF(href: string): string; diff --git a/node_modules/webdav/dist/node/tools/url.js b/node_modules/webdav/dist/node/tools/url.js new file mode 100644 index 00000000..a9e0411a --- /dev/null +++ b/node_modules/webdav/dist/node/tools/url.js @@ -0,0 +1,31 @@ +import URL from "url-parse"; +import { Layerr } from "layerr"; +import _joinURL from "url-join"; +import { normalisePath } from "./path.js"; +export function extractURLPath(fullURL) { + const url = new URL(fullURL); + let urlPath = url.pathname; + if (urlPath.length <= 0) { + urlPath = "/"; + } + return normalisePath(urlPath); +} +export function joinURL(...parts) { + return _joinURL(parts.reduce((output, nextPart, partIndex) => { + if (partIndex === 0 || + nextPart !== "/" || + (nextPart === "/" && output[output.length - 1] !== "/")) { + output.push(nextPart); + } + return output; + }, [])); +} +export function normaliseHREF(href) { + try { + const normalisedHref = href.replace(/^https?:\/\/[^\/]+/, ""); + return normalisedHref; + } + catch (err) { + throw new Layerr(err, "Failed normalising HREF"); + } +} diff --git a/node_modules/webdav/dist/node/tools/xml.d.ts b/node_modules/webdav/dist/node/tools/xml.d.ts new file mode 100644 index 00000000..1ca0ec68 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/xml.d.ts @@ -0,0 +1,2 @@ +export declare function generateLockXML(ownerHREF: string): string; +export declare function parseGenericResponse(xml: string): Object; diff --git a/node_modules/webdav/dist/node/tools/xml.js b/node_modules/webdav/dist/node/tools/xml.js new file mode 100644 index 00000000..05b87a10 --- /dev/null +++ b/node_modules/webdav/dist/node/tools/xml.js @@ -0,0 +1,52 @@ +import { XMLParser, XMLBuilder } from "fast-xml-parser"; +export function generateLockXML(ownerHREF) { + return getBuilder().build(namespace({ + lockinfo: { + "@_xmlns:d": "DAV:", + lockscope: { + exclusive: {} + }, + locktype: { + write: {} + }, + owner: { + href: ownerHREF + } + } + }, "d")); +} +function getBuilder() { + return new XMLBuilder({ + attributeNamePrefix: "@_", + format: true, + ignoreAttributes: false, + suppressEmptyNode: true + }); +} +function getParser() { + return new XMLParser({ + removeNSPrefix: true, + parseAttributeValue: true, + parseTagValue: true + }); +} +function namespace(obj, ns) { + const copy = { ...obj }; + for (const key in copy) { + if (!copy.hasOwnProperty(key)) { + continue; + } + if (copy[key] && typeof copy[key] === "object" && key.indexOf(":") === -1) { + copy[`${ns}:${key}`] = namespace(copy[key], ns); + delete copy[key]; + } + else if (/^@_/.test(key) === false) { + copy[`${ns}:${key}`] = copy[key]; + delete copy[key]; + } + } + return copy; +} +export function parseGenericResponse(xml) { + return getParser().parse(xml); +} diff --git a/node_modules/webdav/dist/node/types.d.ts b/node_modules/webdav/dist/node/types.d.ts new file mode 100644 index 00000000..f7d7be6b --- /dev/null +++ b/node_modules/webdav/dist/node/types.d.ts @@ -0,0 +1,276 @@ +import * as Stream from "node:stream"; +import { Response } from "@buttercup/fetch"; +export { Request, Response } from "@buttercup/fetch"; +export type AuthHeader = string; +export declare enum AuthType { + Auto = "auto", + Digest = "digest", + None = "none", + Password = "password", + Token = "token" +} +export type BufferLike = Buffer | ArrayBuffer; +export interface CreateDirectoryOptions extends WebDAVMethodOptions { + recursive?: boolean; +} +export interface CreateReadStreamOptions extends WebDAVMethodOptions { + callback?: (response: Response) => void; + range?: { + start: number; + end?: number; + }; +} +export type CreateWriteStreamCallback = (response: Response) => void; +export interface CreateWriteStreamOptions extends WebDAVMethodOptions { + overwrite?: boolean; +} +/** as per http://www.webdav.org/specs/rfc2518.html#rfc.section.12.9.1.1 */ +interface DAVPropStat { + prop: DAVResultResponseProps; + status: string; + responsedescription?: string; +} +/** + * DAV response can either be (href, propstat, responsedescription?) or (href, status, responsedescription?) + * @see http://www.webdav.org/specs/rfc2518.html#rfc.section.12.9.1 + */ +interface DAVResultBaseResponse { + href: string; + responsedescription?: string; +} +export interface DAVResultPropstatResponse extends DAVResultBaseResponse { + propstat: DAVPropStat; +} +export interface DAVResultStatusResponse extends DAVResultBaseResponse { + status: string; +} +export type DAVResultResponse = DAVResultBaseResponse & Partial & Partial; +export interface DAVResultResponseProps { + displayname: string; + resourcetype: { + collection?: unknown; + }; + getlastmodified?: string; + getetag?: string; + getcontentlength?: string; + getcontenttype?: string; + "quota-available-bytes"?: string | number; + "quota-used-bytes"?: string | number; + [additionalProp: string]: unknown; +} +export interface DAVResult { + multistatus: { + response: Array; + }; +} +export interface DAVResultRawMultistatus { + response: DAVResultResponse | [DAVResultResponse]; +} +export interface DAVResultRaw { + multistatus: "" | DAVResultRawMultistatus | [DAVResultRawMultistatus]; +} +export interface DigestContext { + username: string; + password: string; + nc: number; + algorithm: string; + hasDigestAuth: boolean; + cnonce?: string; + nonce?: string; + realm?: string; + qop?: string; + opaque?: string; + ha1?: string; +} +export interface DiskQuota { + used: number; + available: DiskQuotaAvailable; +} +export type DiskQuotaAvailable = "unknown" | "unlimited" | number; +export declare enum ErrorCode { + DataTypeNoLength = "data-type-no-length", + InvalidAuthType = "invalid-auth-type", + InvalidOutputFormat = "invalid-output-format", + LinkUnsupportedAuthType = "link-unsupported-auth", + InvalidUpdateRange = "invalid-update-range", + NotSupported = "not-supported" +} +export interface FileStat { + filename: string; + basename: string; + lastmod: string; + size: number; + type: "file" | "directory"; + etag: string | null; + mime?: string; + props?: DAVResultResponseProps; +} +export interface SearchResult { + truncated: boolean; + results: FileStat[]; +} +export interface DAVCompliance { + compliance: string[]; + server: string; +} +export interface GetDirectoryContentsOptions extends WebDAVMethodOptions { + deep?: boolean; + details?: boolean; + glob?: string; + includeSelf?: boolean; +} +export interface GetFileContentsOptions extends WebDAVMethodOptions { + details?: boolean; + format?: "binary" | "text"; + onDownloadProgress?: ProgressEventCallback; +} +export interface GetQuotaOptions extends WebDAVMethodOptions { + details?: boolean; + path?: string; +} +export interface MoveFileOptions extends WebDAVMethodOptions { + /** + * Set to false to disable overwriting an existing resource during MOVE or COPY. + * @default true + */ + overwrite?: boolean; +} +export interface CopyFileOptions extends MoveFileOptions { + /** + * Set to true to create a shallow copy only by only copying the resource with its properties but without its children. + * By default the collection itself with all children is copied (WebDAV Depth header of 'infinity') + * @default false + */ + shallow?: boolean; +} +export interface Headers { + [key: string]: string; +} +export interface LockOptions extends WebDAVMethodOptions { + refreshToken?: string; + timeout?: string; +} +export interface LockResponse { + serverTimeout: string; + token: string; +} +export interface OAuthToken { + access_token: string; + token_type: string; + refresh_token?: string; +} +export interface ProgressEvent { + loaded: number; + total: number; +} +export type ProgressEventCallback = (e: ProgressEvent) => void; +export interface PutFileContentsOptions extends WebDAVMethodOptions { + contentLength?: boolean | number; + overwrite?: boolean; + onUploadProgress?: UploadProgressCallback; +} +export type RequestDataPayload = string | Buffer | ArrayBuffer | Record; +interface RequestOptionsBase { + data?: RequestDataPayload; + headers?: Headers; + httpAgent?: any; + httpsAgent?: any; + maxRedirects?: number; + method: string; + onDownloadProgress?: ProgressEventCallback; + onUploadProgress?: ProgressEventCallback; + signal?: AbortSignal; + transformResponse?: Array<(value: any) => any>; + url?: string; + withCredentials?: boolean; +} +export interface RequestOptionsCustom extends RequestOptionsBase { +} +export interface RequestOptions extends RequestOptionsBase { + url: string; +} +export interface RequestOptionsWithState extends RequestOptions { + _digest?: DigestContext; +} +export type ResponseData = string | Buffer | ArrayBuffer | Object | Array; +export interface ResponseDataDetailed { + data: T; + headers: Headers; + status: number; + statusText: string; +} +export interface ResponseStatusValidator { + (status: number): boolean; +} +export interface StatOptions extends WebDAVMethodOptions { + details?: boolean; +} +export interface SearchOptions extends WebDAVMethodOptions { + details?: boolean; +} +export type UploadProgress = ProgressEvent; +export type UploadProgressCallback = ProgressEventCallback; +export interface WebDAVClient { + copyFile: (filename: string, destination: string, options?: CopyFileOptions) => Promise; + createDirectory: (path: string, options?: CreateDirectoryOptions) => Promise; + createReadStream: (filename: string, options?: CreateReadStreamOptions) => Stream.Readable; + createWriteStream: (filename: string, options?: CreateWriteStreamOptions, callback?: CreateWriteStreamCallback) => Stream.Writable; + customRequest: (path: string, requestOptions: RequestOptionsCustom) => Promise; + deleteFile: (filename: string) => Promise; + exists: (path: string) => Promise; + getDAVCompliance: (path: string) => Promise; + getDirectoryContents: (path: string, options?: GetDirectoryContentsOptions) => Promise | ResponseDataDetailed>>; + getFileContents: (filename: string, options?: GetFileContentsOptions) => Promise>; + getFileDownloadLink: (filename: string) => string; + getFileUploadLink: (filename: string) => string; + getHeaders: () => Headers; + getQuota: (options?: GetQuotaOptions) => Promise>; + lock: (path: string, options?: LockOptions) => Promise; + moveFile: (filename: string, destinationFilename: string, options?: MoveFileOptions) => Promise; + putFileContents: (filename: string, data: string | BufferLike | Stream.Readable, options?: PutFileContentsOptions) => Promise; + partialUpdateFileContents: (filePath: string, start: number, end: number, data: string | BufferLike | Stream.Readable, options?: WebDAVMethodOptions) => Promise; + search: (path: string, options?: SearchOptions) => Promise>; + setHeaders: (headers: Headers) => void; + stat: (path: string, options?: StatOptions) => Promise>; + unlock: (path: string, token: string, options?: WebDAVMethodOptions) => Promise; +} +export interface WebDAVClientContext { + authType: AuthType; + remoteBasePath?: string; + contactHref: string; + digest?: DigestContext; + ha1?: string; + headers: Headers; + httpAgent?: any; + httpsAgent?: any; + password?: string; + remotePath: string; + remoteURL: string; + token?: OAuthToken; + username?: string; + withCredentials?: boolean; +} +export interface WebDAVClientError extends Error { + status?: number; + response?: Response; +} +export interface WebDAVClientOptions { + authType?: AuthType; + remoteBasePath?: string; + contactHref?: string; + ha1?: string; + headers?: Headers; + httpAgent?: any; + httpsAgent?: any; + maxBodyLength?: number; + maxContentLength?: number; + password?: string; + token?: OAuthToken; + username?: string; + withCredentials?: boolean; +} +export interface WebDAVMethodOptions { + data?: RequestDataPayload; + headers?: Headers; + signal?: AbortSignal; +} diff --git a/node_modules/webdav/dist/node/types.js b/node_modules/webdav/dist/node/types.js new file mode 100644 index 00000000..ec7bbdc2 --- /dev/null +++ b/node_modules/webdav/dist/node/types.js @@ -0,0 +1,18 @@ +export { Request, Response } from "@buttercup/fetch"; +export var AuthType; +(function (AuthType) { + AuthType["Auto"] = "auto"; + AuthType["Digest"] = "digest"; + AuthType["None"] = "none"; + AuthType["Password"] = "password"; + AuthType["Token"] = "token"; +})(AuthType || (AuthType = {})); +export var ErrorCode; +(function (ErrorCode) { + ErrorCode["DataTypeNoLength"] = "data-type-no-length"; + ErrorCode["InvalidAuthType"] = "invalid-auth-type"; + ErrorCode["InvalidOutputFormat"] = "invalid-output-format"; + ErrorCode["LinkUnsupportedAuthType"] = "link-unsupported-auth"; + ErrorCode["InvalidUpdateRange"] = "invalid-update-range"; + ErrorCode["NotSupported"] = "not-supported"; +})(ErrorCode || (ErrorCode = {})); diff --git a/node_modules/webdav/dist/react-native/index.js b/node_modules/webdav/dist/react-native/index.js new file mode 100644 index 00000000..e5007f90 --- /dev/null +++ b/node_modules/webdav/dist/react-native/index.js @@ -0,0 +1,2 @@ +/*! 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No newline at end of file diff --git a/node_modules/webdav/dist/web/index.js.LICENSE.txt b/node_modules/webdav/dist/web/index.js.LICENSE.txt new file mode 100644 index 00000000..8d194001 --- /dev/null +++ b/node_modules/webdav/dist/web/index.js.LICENSE.txt @@ -0,0 +1,16 @@ +/*! + * Determine if an object is a Buffer + * + * @author Feross Aboukhadijeh + * @license MIT + */ + +/*! https://mths.be/base64 v1.0.0 by @mathias | MIT license */ + +/** +* @license nested-property https://github.com/cosmosio/nested-property +* +* The MIT License (MIT) +* +* Copyright (c) 2014-2020 Olivier Scherrer +*/ diff --git a/node_modules/webdav/node_modules/entities/LICENSE b/node_modules/webdav/node_modules/entities/LICENSE new file mode 100644 index 00000000..c464f863 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/LICENSE @@ -0,0 +1,11 @@ +Copyright (c) Felix Böhm +All rights reserved. + +Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: + +Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. + +Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. + +THIS IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS, +EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/node_modules/webdav/node_modules/entities/decode.js b/node_modules/webdav/node_modules/entities/decode.js new file mode 100644 index 00000000..c278895e --- /dev/null +++ b/node_modules/webdav/node_modules/entities/decode.js @@ -0,0 +1,3 @@ +// Make exports work in Node < 12 +// eslint-disable-next-line no-undef, unicorn/prefer-module +module.exports = require("./dist/commonjs/decode.js"); diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/decode-codepoint.d.ts b/node_modules/webdav/node_modules/entities/dist/commonjs/decode-codepoint.d.ts new file mode 100644 index 00000000..32f77c95 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/decode-codepoint.d.ts @@ -0,0 +1,19 @@ +/** + * Polyfill for `String.fromCodePoint`. It is used to create a string from a Unicode code point. + */ +export declare const fromCodePoint: (...codePoints: number[]) => string; +/** + * Replace the given code point with a replacement character if it is a + * surrogate or is outside the valid range. Otherwise return the code + * point unchanged. + */ +export declare function replaceCodePoint(codePoint: number): number; +/** + * Replace the code point if relevant, then convert it to a string. + * + * @deprecated Use `fromCodePoint(replaceCodePoint(codePoint))` instead. + * @param codePoint The code point to decode. + * @returns The decoded code point. + */ +export declare function decodeCodePoint(codePoint: number): string; +//# sourceMappingURL=decode-codepoint.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/decode-codepoint.d.ts.map b/node_modules/webdav/node_modules/entities/dist/commonjs/decode-codepoint.d.ts.map new file mode 100644 index 00000000..3518e578 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/decode-codepoint.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"decode-codepoint.d.ts","sourceRoot":"","sources":["../../src/decode-codepoint.ts"],"names":[],"mappings":"AAkCA;;GAEG;AACH,eAAO,MAAM,aAAa,EAAE,CAAC,GAAG,UAAU,EAAE,MAAM,EAAE,KAAK,MAgBpD,CAAC;AAEN;;;;GAIG;AACH,wBAAgB,gBAAgB,CAAC,SAAS,EAAE,MAAM,GAAG,MAAM,CAS1D;AAED;;;;;;GAMG;AACH,wBAAgB,eAAe,CAAC,SAAS,EAAE,MAAM,GAAG,MAAM,CAEzD"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/decode-codepoint.js b/node_modules/webdav/node_modules/entities/dist/commonjs/decode-codepoint.js new file mode 100644 index 00000000..9539f670 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/decode-codepoint.js @@ -0,0 +1,77 @@ +"use strict"; +// Adapted from https://github.com/mathiasbynens/he/blob/36afe179392226cf1b6ccdb16ebbb7a5a844d93a/src/he.js#L106-L134 +var _a; +Object.defineProperty(exports, "__esModule", { value: true }); +exports.fromCodePoint = void 0; +exports.replaceCodePoint = replaceCodePoint; +exports.decodeCodePoint = decodeCodePoint; +const decodeMap = new Map([ + [0, 65533], + // C1 Unicode control character reference replacements + [128, 8364], + [130, 8218], + [131, 402], + [132, 8222], + [133, 8230], + [134, 8224], + [135, 8225], + [136, 710], + [137, 8240], + [138, 352], + [139, 8249], + [140, 338], + [142, 381], + [145, 8216], + [146, 8217], + [147, 8220], + [148, 8221], + [149, 8226], + [150, 8211], + [151, 8212], + [152, 732], + [153, 8482], + [154, 353], + [155, 8250], + [156, 339], + [158, 382], + [159, 376], +]); +/** + * Polyfill for `String.fromCodePoint`. It is used to create a string from a Unicode code point. + */ +exports.fromCodePoint = +// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition, n/no-unsupported-features/es-builtins +(_a = String.fromCodePoint) !== null && _a !== void 0 ? _a : function (codePoint) { + let output = ""; + if (codePoint > 65535) { + codePoint -= 65536; + output += String.fromCharCode(((codePoint >>> 10) & 1023) | 55296); + codePoint = 56320 | (codePoint & 1023); + } + output += String.fromCharCode(codePoint); + return output; +}; +/** + * Replace the given code point with a replacement character if it is a + * surrogate or is outside the valid range. Otherwise return the code + * point unchanged. + */ +function replaceCodePoint(codePoint) { + var _a; + if ((codePoint >= 55296 && codePoint <= 57343) || + codePoint > 1114111) { + return 65533; + } + return (_a = decodeMap.get(codePoint)) !== null && _a !== void 0 ? _a : codePoint; +} +/** + * Replace the code point if relevant, then convert it to a string. + * + * @deprecated Use `fromCodePoint(replaceCodePoint(codePoint))` instead. + * @param codePoint The code point to decode. + * @returns The decoded code point. + */ +function decodeCodePoint(codePoint) { + return (0, exports.fromCodePoint)(replaceCodePoint(codePoint)); +} +//# sourceMappingURL=decode-codepoint.js.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/decode-codepoint.js.map b/node_modules/webdav/node_modules/entities/dist/commonjs/decode-codepoint.js.map new file mode 100644 index 00000000..ba274bf2 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/decode-codepoint.js.map @@ -0,0 +1 @@ +{"version":3,"file":"decode-codepoint.js","sourceRoot":"","sources":["../../src/decode-codepoint.ts"],"names":[],"mappings":";AAAA,qHAAqH;;;;AA4DrH,4CASC;AASD,0CAEC;AA9ED,MAAM,SAAS,GAAG,IAAI,GAAG,CAAC;IACtB,CAAC,CAAC,EAAE,KAAM,CAAC;IACX,sDAAsD;IACtD,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,GAAG,CAAC;CACb,CAAC,CAAC;AAEH;;GAEG;AACU,QAAA,aAAa;AACtB,8GAA8G;AAC9G,MAAA,MAAM,CAAC,aAAa,mCACpB,UAAU,SAAiB;IACvB,IAAI,MAAM,GAAG,EAAE,CAAC;IAEhB,IAAI,SAAS,GAAG,KAAO,EAAE,CAAC;QACtB,SAAS,IAAI,KAAS,CAAC;QACvB,MAAM,IAAI,MAAM,CAAC,YAAY,CACzB,CAAC,CAAC,SAAS,KAAK,EAAE,CAAC,GAAG,IAAM,CAAC,GAAG,KAAO,CAC1C,CAAC;QACF,SAAS,GAAG,KAAO,GAAG,CAAC,SAAS,GAAG,IAAM,CAAC,CAAC;IAC/C,CAAC;IAED,MAAM,IAAI,MAAM,CAAC,YAAY,CAAC,SAAS,CAAC,CAAC;IACzC,OAAO,MAAM,CAAC;AAClB,CAAC,CAAC;AAEN;;;;GAIG;AACH,SAAgB,gBAAgB,CAAC,SAAiB;;IAC9C,IACI,CAAC,SAAS,IAAI,KAAO,IAAI,SAAS,IAAI,KAAO,CAAC;QAC9C,SAAS,GAAG,OAAU,EACxB,CAAC;QACC,OAAO,KAAO,CAAC;IACnB,CAAC;IAED,OAAO,MAAA,SAAS,CAAC,GAAG,CAAC,SAAS,CAAC,mCAAI,SAAS,CAAC;AACjD,CAAC;AAED;;;;;;GAMG;AACH,SAAgB,eAAe,CAAC,SAAiB;IAC7C,OAAO,IAAA,qBAAa,EAAC,gBAAgB,CAAC,SAAS,CAAC,CAAC,CAAC;AACtD,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/decode.d.ts b/node_modules/webdav/node_modules/entities/dist/commonjs/decode.d.ts new file mode 100644 index 00000000..96c160c1 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/decode.d.ts @@ -0,0 +1,209 @@ +export declare enum BinTrieFlags { + VALUE_LENGTH = 49152, + BRANCH_LENGTH = 16256, + JUMP_TABLE = 127 +} +export declare enum DecodingMode { + /** Entities in text nodes that can end with any character. */ + Legacy = 0, + /** Only allow entities terminated with a semicolon. */ + Strict = 1, + /** Entities in attributes have limitations on ending characters. */ + Attribute = 2 +} +/** + * Producers for character reference errors as defined in the HTML spec. + */ +export interface EntityErrorProducer { + missingSemicolonAfterCharacterReference(): void; + absenceOfDigitsInNumericCharacterReference(consumedCharacters: number): void; + validateNumericCharacterReference(code: number): void; +} +/** + * Token decoder with support of writing partial entities. + */ +export declare class EntityDecoder { + /** The tree used to decode entities. */ + private readonly decodeTree; + /** + * The function that is called when a codepoint is decoded. + * + * For multi-byte named entities, this will be called multiple times, + * with the second codepoint, and the same `consumed` value. + * + * @param codepoint The decoded codepoint. + * @param consumed The number of bytes consumed by the decoder. + */ + private readonly emitCodePoint; + /** An object that is used to produce errors. */ + private readonly errors?; + constructor( + /** The tree used to decode entities. */ + decodeTree: Uint16Array, + /** + * The function that is called when a codepoint is decoded. + * + * For multi-byte named entities, this will be called multiple times, + * with the second codepoint, and the same `consumed` value. + * + * @param codepoint The decoded codepoint. + * @param consumed The number of bytes consumed by the decoder. + */ + emitCodePoint: (cp: number, consumed: number) => void, + /** An object that is used to produce errors. */ + errors?: EntityErrorProducer | undefined); + /** The current state of the decoder. */ + private state; + /** Characters that were consumed while parsing an entity. */ + private consumed; + /** + * The result of the entity. + * + * Either the result index of a numeric entity, or the codepoint of a + * numeric entity. + */ + private result; + /** The current index in the decode tree. */ + private treeIndex; + /** The number of characters that were consumed in excess. */ + private excess; + /** The mode in which the decoder is operating. */ + private decodeMode; + /** Resets the instance to make it reusable. */ + startEntity(decodeMode: DecodingMode): void; + /** + * Write an entity to the decoder. This can be called multiple times with partial entities. + * If the entity is incomplete, the decoder will return -1. + * + * Mirrors the implementation of `getDecoder`, but with the ability to stop decoding if the + * entity is incomplete, and resume when the next string is written. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The offset at which the entity begins. Should be 0 if this is not the first call. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + write(input: string, offset: number): number; + /** + * Switches between the numeric decimal and hexadecimal states. + * + * Equivalent to the `Numeric character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + private stateNumericStart; + private addToNumericResult; + /** + * Parses a hexadecimal numeric entity. + * + * Equivalent to the `Hexademical character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + private stateNumericHex; + /** + * Parses a decimal numeric entity. + * + * Equivalent to the `Decimal character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + private stateNumericDecimal; + /** + * Validate and emit a numeric entity. + * + * Implements the logic from the `Hexademical character reference start + * state` and `Numeric character reference end state` in the HTML spec. + * + * @param lastCp The last code point of the entity. Used to see if the + * entity was terminated with a semicolon. + * @param expectedLength The minimum number of characters that should be + * consumed. Used to validate that at least one digit + * was consumed. + * @returns The number of characters that were consumed. + */ + private emitNumericEntity; + /** + * Parses a named entity. + * + * Equivalent to the `Named character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + private stateNamedEntity; + /** + * Emit a named entity that was not terminated with a semicolon. + * + * @returns The number of characters consumed. + */ + private emitNotTerminatedNamedEntity; + /** + * Emit a named entity. + * + * @param result The index of the entity in the decode tree. + * @param valueLength The number of bytes in the entity. + * @param consumed The number of characters consumed. + * + * @returns The number of characters consumed. + */ + private emitNamedEntityData; + /** + * Signal to the parser that the end of the input was reached. + * + * Remaining data will be emitted and relevant errors will be produced. + * + * @returns The number of characters consumed. + */ + end(): number; +} +/** + * Determines the branch of the current node that is taken given the current + * character. This function is used to traverse the trie. + * + * @param decodeTree The trie. + * @param current The current node. + * @param nodeIdx The index right after the current node and its value. + * @param char The current character. + * @returns The index of the next node, or -1 if no branch is taken. + */ +export declare function determineBranch(decodeTree: Uint16Array, current: number, nodeIndex: number, char: number): number; +/** + * Decodes an HTML string. + * + * @param htmlString The string to decode. + * @param mode The decoding mode. + * @returns The decoded string. + */ +export declare function decodeHTML(htmlString: string, mode?: DecodingMode): string; +/** + * Decodes an HTML string in an attribute. + * + * @param htmlAttribute The string to decode. + * @returns The decoded string. + */ +export declare function decodeHTMLAttribute(htmlAttribute: string): string; +/** + * Decodes an HTML string, requiring all entities to be terminated by a semicolon. + * + * @param htmlString The string to decode. + * @returns The decoded string. + */ +export declare function decodeHTMLStrict(htmlString: string): string; +/** + * Decodes an XML string, requiring all entities to be terminated by a semicolon. + * + * @param xmlString The string to decode. + * @returns The decoded string. + */ +export declare function decodeXML(xmlString: string): string; +export { htmlDecodeTree } from "./generated/decode-data-html.js"; +export { xmlDecodeTree } from "./generated/decode-data-xml.js"; +export { decodeCodePoint, replaceCodePoint, fromCodePoint, } from "./decode-codepoint.js"; +//# sourceMappingURL=decode.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/decode.d.ts.map b/node_modules/webdav/node_modules/entities/dist/commonjs/decode.d.ts.map new file mode 100644 index 00000000..fc233f43 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/decode.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"decode.d.ts","sourceRoot":"","sources":["../../src/decode.ts"],"names":[],"mappings":"AAsBA,oBAAY,YAAY;IACpB,YAAY,QAAwB;IACpC,aAAa,QAAwB;IACrC,UAAU,MAAwB;CACrC;AAuCD,oBAAY,YAAY;IACpB,8DAA8D;IAC9D,MAAM,IAAI;IACV,uDAAuD;IACvD,MAAM,IAAI;IACV,oEAAoE;IACpE,SAAS,IAAI;CAChB;AAED;;GAEG;AACH,MAAM,WAAW,mBAAmB;IAChC,uCAAuC,IAAI,IAAI,CAAC;IAChD,0CAA0C,CACtC,kBAAkB,EAAE,MAAM,GAC3B,IAAI,CAAC;IACR,iCAAiC,CAAC,IAAI,EAAE,MAAM,GAAG,IAAI,CAAC;CACzD;AAED;;GAEG;AACH,qBAAa,aAAa;IAElB,wCAAwC;IACxC,OAAO,CAAC,QAAQ,CAAC,UAAU;IAC3B;;;;;;;;OAQG;IACH,OAAO,CAAC,QAAQ,CAAC,aAAa;IAC9B,gDAAgD;IAChD,OAAO,CAAC,QAAQ,CAAC,MAAM,CAAC;;IAbxB,wCAAwC;IACvB,UAAU,EAAE,WAAW;IACxC;;;;;;;;OAQG;IACc,aAAa,EAAE,CAAC,EAAE,EAAE,MAAM,EAAE,QAAQ,EAAE,MAAM,KAAK,IAAI;IACtE,gDAAgD;IAC/B,MAAM,CAAC,EAAE,mBAAmB,GAAG,SAAS;IAG7D,wCAAwC;IACxC,OAAO,CAAC,KAAK,CAAkC;IAC/C,6DAA6D;IAC7D,OAAO,CAAC,QAAQ,CAAK;IACrB;;;;;OAKG;IACH,OAAO,CAAC,MAAM,CAAK;IAEnB,4CAA4C;IAC5C,OAAO,CAAC,SAAS,CAAK;IACtB,6DAA6D;IAC7D,OAAO,CAAC,MAAM,CAAK;IACnB,kDAAkD;IAClD,OAAO,CAAC,UAAU,CAAuB;IAEzC,+CAA+C;IAC/C,WAAW,CAAC,UAAU,EAAE,YAAY,GAAG,IAAI;IAS3C;;;;;;;;;;OAUG;IACH,KAAK,CAAC,KAAK,EAAE,MAAM,EAAE,MAAM,EAAE,MAAM,GAAG,MAAM;IA8B5C;;;;;;;;OAQG;IACH,OAAO,CAAC,iBAAiB;IAezB,OAAO,CAAC,kBAAkB;IAe1B;;;;;;;;OAQG;IACH,OAAO,CAAC,eAAe;IAkBvB;;;;;;;;OAQG;IACH,OAAO,CAAC,mBAAmB;IAkB3B;;;;;;;;;;;;OAYG;IACH,OAAO,CAAC,iBAAiB;IA6BzB;;;;;;;;OAQG;IACH,OAAO,CAAC,gBAAgB;IAsDxB;;;;OAIG;IACH,OAAO,CAAC,4BAA4B;IAYpC;;;;;;;;OAQG;IACH,OAAO,CAAC,mBAAmB;IAqB3B;;;;;;OAMG;IACH,GAAG,IAAI,MAAM;CA6BhB;AAoDD;;;;;;;;;GASG;AACH,wBAAgB,eAAe,CAC3B,UAAU,EAAE,WAAW,EACvB,OAAO,EAAE,MAAM,EACf,SAAS,EAAE,MAAM,EACjB,IAAI,EAAE,MAAM,GACb,MAAM,CAsCR;AAKD;;;;;;GAMG;AACH,wBAAgB,UAAU,CACtB,UAAU,EAAE,MAAM,EAClB,IAAI,GAAE,YAAkC,GACzC,MAAM,CAER;AAED;;;;;GAKG;AACH,wBAAgB,mBAAmB,CAAC,aAAa,EAAE,MAAM,GAAG,MAAM,CAEjE;AAED;;;;;GAKG;AACH,wBAAgB,gBAAgB,CAAC,UAAU,EAAE,MAAM,GAAG,MAAM,CAE3D;AAED;;;;;GAKG;AACH,wBAAgB,SAAS,CAAC,SAAS,EAAE,MAAM,GAAG,MAAM,CAEnD;AAGD,OAAO,EAAE,cAAc,EAAE,MAAM,iCAAiC,CAAC;AACjE,OAAO,EAAE,aAAa,EAAE,MAAM,gCAAgC,CAAC;AAE/D,OAAO,EACH,eAAe,EACf,gBAAgB,EAChB,aAAa,GAChB,MAAM,uBAAuB,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/decode.js b/node_modules/webdav/node_modules/entities/dist/commonjs/decode.js new file mode 100644 index 00000000..3e239db6 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/decode.js @@ -0,0 +1,511 @@ +"use strict"; +Object.defineProperty(exports, "__esModule", { value: true }); +exports.fromCodePoint = exports.replaceCodePoint = exports.decodeCodePoint = exports.xmlDecodeTree = exports.htmlDecodeTree = exports.EntityDecoder = exports.DecodingMode = exports.BinTrieFlags = void 0; +exports.determineBranch = determineBranch; +exports.decodeHTML = decodeHTML; +exports.decodeHTMLAttribute = decodeHTMLAttribute; +exports.decodeHTMLStrict = decodeHTMLStrict; +exports.decodeXML = decodeXML; +const decode_data_html_js_1 = require("./generated/decode-data-html.js"); +const decode_data_xml_js_1 = require("./generated/decode-data-xml.js"); +const decode_codepoint_js_1 = require("./decode-codepoint.js"); +var CharCodes; +(function (CharCodes) { + CharCodes[CharCodes["NUM"] = 35] = "NUM"; + CharCodes[CharCodes["SEMI"] = 59] = "SEMI"; + CharCodes[CharCodes["EQUALS"] = 61] = "EQUALS"; + CharCodes[CharCodes["ZERO"] = 48] = "ZERO"; + CharCodes[CharCodes["NINE"] = 57] = "NINE"; + CharCodes[CharCodes["LOWER_A"] = 97] = "LOWER_A"; + CharCodes[CharCodes["LOWER_F"] = 102] = "LOWER_F"; + CharCodes[CharCodes["LOWER_X"] = 120] = "LOWER_X"; + CharCodes[CharCodes["LOWER_Z"] = 122] = "LOWER_Z"; + CharCodes[CharCodes["UPPER_A"] = 65] = "UPPER_A"; + CharCodes[CharCodes["UPPER_F"] = 70] = "UPPER_F"; + CharCodes[CharCodes["UPPER_Z"] = 90] = "UPPER_Z"; +})(CharCodes || (CharCodes = {})); +/** Bit that needs to be set to convert an upper case ASCII character to lower case */ +const TO_LOWER_BIT = 32; +var BinTrieFlags; +(function (BinTrieFlags) { + BinTrieFlags[BinTrieFlags["VALUE_LENGTH"] = 49152] = "VALUE_LENGTH"; + BinTrieFlags[BinTrieFlags["BRANCH_LENGTH"] = 16256] = "BRANCH_LENGTH"; + BinTrieFlags[BinTrieFlags["JUMP_TABLE"] = 127] = "JUMP_TABLE"; +})(BinTrieFlags || (exports.BinTrieFlags = BinTrieFlags = {})); +function isNumber(code) { + return code >= CharCodes.ZERO && code <= CharCodes.NINE; +} +function isHexadecimalCharacter(code) { + return ((code >= CharCodes.UPPER_A && code <= CharCodes.UPPER_F) || + (code >= CharCodes.LOWER_A && code <= CharCodes.LOWER_F)); +} +function isAsciiAlphaNumeric(code) { + return ((code >= CharCodes.UPPER_A && code <= CharCodes.UPPER_Z) || + (code >= CharCodes.LOWER_A && code <= CharCodes.LOWER_Z) || + isNumber(code)); +} +/** + * Checks if the given character is a valid end character for an entity in an attribute. + * + * Attribute values that aren't terminated properly aren't parsed, and shouldn't lead to a parser error. + * See the example in https://html.spec.whatwg.org/multipage/parsing.html#named-character-reference-state + */ +function isEntityInAttributeInvalidEnd(code) { + return code === CharCodes.EQUALS || isAsciiAlphaNumeric(code); +} +var EntityDecoderState; +(function (EntityDecoderState) { + EntityDecoderState[EntityDecoderState["EntityStart"] = 0] = "EntityStart"; + EntityDecoderState[EntityDecoderState["NumericStart"] = 1] = "NumericStart"; + EntityDecoderState[EntityDecoderState["NumericDecimal"] = 2] = "NumericDecimal"; + EntityDecoderState[EntityDecoderState["NumericHex"] = 3] = "NumericHex"; + EntityDecoderState[EntityDecoderState["NamedEntity"] = 4] = "NamedEntity"; +})(EntityDecoderState || (EntityDecoderState = {})); +var DecodingMode; +(function (DecodingMode) { + /** Entities in text nodes that can end with any character. */ + DecodingMode[DecodingMode["Legacy"] = 0] = "Legacy"; + /** Only allow entities terminated with a semicolon. */ + DecodingMode[DecodingMode["Strict"] = 1] = "Strict"; + /** Entities in attributes have limitations on ending characters. */ + DecodingMode[DecodingMode["Attribute"] = 2] = "Attribute"; +})(DecodingMode || (exports.DecodingMode = DecodingMode = {})); +/** + * Token decoder with support of writing partial entities. + */ +class EntityDecoder { + constructor( + /** The tree used to decode entities. */ + decodeTree, + /** + * The function that is called when a codepoint is decoded. + * + * For multi-byte named entities, this will be called multiple times, + * with the second codepoint, and the same `consumed` value. + * + * @param codepoint The decoded codepoint. + * @param consumed The number of bytes consumed by the decoder. + */ + emitCodePoint, + /** An object that is used to produce errors. */ + errors) { + this.decodeTree = decodeTree; + this.emitCodePoint = emitCodePoint; + this.errors = errors; + /** The current state of the decoder. */ + this.state = EntityDecoderState.EntityStart; + /** Characters that were consumed while parsing an entity. */ + this.consumed = 1; + /** + * The result of the entity. + * + * Either the result index of a numeric entity, or the codepoint of a + * numeric entity. + */ + this.result = 0; + /** The current index in the decode tree. */ + this.treeIndex = 0; + /** The number of characters that were consumed in excess. */ + this.excess = 1; + /** The mode in which the decoder is operating. */ + this.decodeMode = DecodingMode.Strict; + } + /** Resets the instance to make it reusable. */ + startEntity(decodeMode) { + this.decodeMode = decodeMode; + this.state = EntityDecoderState.EntityStart; + this.result = 0; + this.treeIndex = 0; + this.excess = 1; + this.consumed = 1; + } + /** + * Write an entity to the decoder. This can be called multiple times with partial entities. + * If the entity is incomplete, the decoder will return -1. + * + * Mirrors the implementation of `getDecoder`, but with the ability to stop decoding if the + * entity is incomplete, and resume when the next string is written. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The offset at which the entity begins. Should be 0 if this is not the first call. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + write(input, offset) { + switch (this.state) { + case EntityDecoderState.EntityStart: { + if (input.charCodeAt(offset) === CharCodes.NUM) { + this.state = EntityDecoderState.NumericStart; + this.consumed += 1; + return this.stateNumericStart(input, offset + 1); + } + this.state = EntityDecoderState.NamedEntity; + return this.stateNamedEntity(input, offset); + } + case EntityDecoderState.NumericStart: { + return this.stateNumericStart(input, offset); + } + case EntityDecoderState.NumericDecimal: { + return this.stateNumericDecimal(input, offset); + } + case EntityDecoderState.NumericHex: { + return this.stateNumericHex(input, offset); + } + case EntityDecoderState.NamedEntity: { + return this.stateNamedEntity(input, offset); + } + } + } + /** + * Switches between the numeric decimal and hexadecimal states. + * + * Equivalent to the `Numeric character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + stateNumericStart(input, offset) { + if (offset >= input.length) { + return -1; + } + if ((input.charCodeAt(offset) | TO_LOWER_BIT) === CharCodes.LOWER_X) { + this.state = EntityDecoderState.NumericHex; + this.consumed += 1; + return this.stateNumericHex(input, offset + 1); + } + this.state = EntityDecoderState.NumericDecimal; + return this.stateNumericDecimal(input, offset); + } + addToNumericResult(input, start, end, base) { + if (start !== end) { + const digitCount = end - start; + this.result = + this.result * Math.pow(base, digitCount) + + Number.parseInt(input.substr(start, digitCount), base); + this.consumed += digitCount; + } + } + /** + * Parses a hexadecimal numeric entity. + * + * Equivalent to the `Hexademical character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + stateNumericHex(input, offset) { + const startIndex = offset; + while (offset < input.length) { + const char = input.charCodeAt(offset); + if (isNumber(char) || isHexadecimalCharacter(char)) { + offset += 1; + } + else { + this.addToNumericResult(input, startIndex, offset, 16); + return this.emitNumericEntity(char, 3); + } + } + this.addToNumericResult(input, startIndex, offset, 16); + return -1; + } + /** + * Parses a decimal numeric entity. + * + * Equivalent to the `Decimal character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + stateNumericDecimal(input, offset) { + const startIndex = offset; + while (offset < input.length) { + const char = input.charCodeAt(offset); + if (isNumber(char)) { + offset += 1; + } + else { + this.addToNumericResult(input, startIndex, offset, 10); + return this.emitNumericEntity(char, 2); + } + } + this.addToNumericResult(input, startIndex, offset, 10); + return -1; + } + /** + * Validate and emit a numeric entity. + * + * Implements the logic from the `Hexademical character reference start + * state` and `Numeric character reference end state` in the HTML spec. + * + * @param lastCp The last code point of the entity. Used to see if the + * entity was terminated with a semicolon. + * @param expectedLength The minimum number of characters that should be + * consumed. Used to validate that at least one digit + * was consumed. + * @returns The number of characters that were consumed. + */ + emitNumericEntity(lastCp, expectedLength) { + var _a; + // Ensure we consumed at least one digit. + if (this.consumed <= expectedLength) { + (_a = this.errors) === null || _a === void 0 ? void 0 : _a.absenceOfDigitsInNumericCharacterReference(this.consumed); + return 0; + } + // Figure out if this is a legit end of the entity + if (lastCp === CharCodes.SEMI) { + this.consumed += 1; + } + else if (this.decodeMode === DecodingMode.Strict) { + return 0; + } + this.emitCodePoint((0, decode_codepoint_js_1.replaceCodePoint)(this.result), this.consumed); + if (this.errors) { + if (lastCp !== CharCodes.SEMI) { + this.errors.missingSemicolonAfterCharacterReference(); + } + this.errors.validateNumericCharacterReference(this.result); + } + return this.consumed; + } + /** + * Parses a named entity. + * + * Equivalent to the `Named character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + stateNamedEntity(input, offset) { + const { decodeTree } = this; + let current = decodeTree[this.treeIndex]; + // The mask is the number of bytes of the value, including the current byte. + let valueLength = (current & BinTrieFlags.VALUE_LENGTH) >> 14; + for (; offset < input.length; offset++, this.excess++) { + const char = input.charCodeAt(offset); + this.treeIndex = determineBranch(decodeTree, current, this.treeIndex + Math.max(1, valueLength), char); + if (this.treeIndex < 0) { + return this.result === 0 || + // If we are parsing an attribute + (this.decodeMode === DecodingMode.Attribute && + // We shouldn't have consumed any characters after the entity, + (valueLength === 0 || + // And there should be no invalid characters. + isEntityInAttributeInvalidEnd(char))) + ? 0 + : this.emitNotTerminatedNamedEntity(); + } + current = decodeTree[this.treeIndex]; + valueLength = (current & BinTrieFlags.VALUE_LENGTH) >> 14; + // If the branch is a value, store it and continue + if (valueLength !== 0) { + // If the entity is terminated by a semicolon, we are done. + if (char === CharCodes.SEMI) { + return this.emitNamedEntityData(this.treeIndex, valueLength, this.consumed + this.excess); + } + // If we encounter a non-terminated (legacy) entity while parsing strictly, then ignore it. + if (this.decodeMode !== DecodingMode.Strict) { + this.result = this.treeIndex; + this.consumed += this.excess; + this.excess = 0; + } + } + } + return -1; + } + /** + * Emit a named entity that was not terminated with a semicolon. + * + * @returns The number of characters consumed. + */ + emitNotTerminatedNamedEntity() { + var _a; + const { result, decodeTree } = this; + const valueLength = (decodeTree[result] & BinTrieFlags.VALUE_LENGTH) >> 14; + this.emitNamedEntityData(result, valueLength, this.consumed); + (_a = this.errors) === null || _a === void 0 ? void 0 : _a.missingSemicolonAfterCharacterReference(); + return this.consumed; + } + /** + * Emit a named entity. + * + * @param result The index of the entity in the decode tree. + * @param valueLength The number of bytes in the entity. + * @param consumed The number of characters consumed. + * + * @returns The number of characters consumed. + */ + emitNamedEntityData(result, valueLength, consumed) { + const { decodeTree } = this; + this.emitCodePoint(valueLength === 1 + ? decodeTree[result] & ~BinTrieFlags.VALUE_LENGTH + : decodeTree[result + 1], consumed); + if (valueLength === 3) { + // For multi-byte values, we need to emit the second byte. + this.emitCodePoint(decodeTree[result + 2], consumed); + } + return consumed; + } + /** + * Signal to the parser that the end of the input was reached. + * + * Remaining data will be emitted and relevant errors will be produced. + * + * @returns The number of characters consumed. + */ + end() { + var _a; + switch (this.state) { + case EntityDecoderState.NamedEntity: { + // Emit a named entity if we have one. + return this.result !== 0 && + (this.decodeMode !== DecodingMode.Attribute || + this.result === this.treeIndex) + ? this.emitNotTerminatedNamedEntity() + : 0; + } + // Otherwise, emit a numeric entity if we have one. + case EntityDecoderState.NumericDecimal: { + return this.emitNumericEntity(0, 2); + } + case EntityDecoderState.NumericHex: { + return this.emitNumericEntity(0, 3); + } + case EntityDecoderState.NumericStart: { + (_a = this.errors) === null || _a === void 0 ? void 0 : _a.absenceOfDigitsInNumericCharacterReference(this.consumed); + return 0; + } + case EntityDecoderState.EntityStart: { + // Return 0 if we have no entity. + return 0; + } + } + } +} +exports.EntityDecoder = EntityDecoder; +/** + * Creates a function that decodes entities in a string. + * + * @param decodeTree The decode tree. + * @returns A function that decodes entities in a string. + */ +function getDecoder(decodeTree) { + let returnValue = ""; + const decoder = new EntityDecoder(decodeTree, (data) => (returnValue += (0, decode_codepoint_js_1.fromCodePoint)(data))); + return function decodeWithTrie(input, decodeMode) { + let lastIndex = 0; + let offset = 0; + while ((offset = input.indexOf("&", offset)) >= 0) { + returnValue += input.slice(lastIndex, offset); + decoder.startEntity(decodeMode); + const length = decoder.write(input, + // Skip the "&" + offset + 1); + if (length < 0) { + lastIndex = offset + decoder.end(); + break; + } + lastIndex = offset + length; + // If `length` is 0, skip the current `&` and continue. + offset = length === 0 ? lastIndex + 1 : lastIndex; + } + const result = returnValue + input.slice(lastIndex); + // Make sure we don't keep a reference to the final string. + returnValue = ""; + return result; + }; +} +/** + * Determines the branch of the current node that is taken given the current + * character. This function is used to traverse the trie. + * + * @param decodeTree The trie. + * @param current The current node. + * @param nodeIdx The index right after the current node and its value. + * @param char The current character. + * @returns The index of the next node, or -1 if no branch is taken. + */ +function determineBranch(decodeTree, current, nodeIndex, char) { + const branchCount = (current & BinTrieFlags.BRANCH_LENGTH) >> 7; + const jumpOffset = current & BinTrieFlags.JUMP_TABLE; + // Case 1: Single branch encoded in jump offset + if (branchCount === 0) { + return jumpOffset !== 0 && char === jumpOffset ? nodeIndex : -1; + } + // Case 2: Multiple branches encoded in jump table + if (jumpOffset) { + const value = char - jumpOffset; + return value < 0 || value >= branchCount + ? -1 + : decodeTree[nodeIndex + value] - 1; + } + // Case 3: Multiple branches encoded in dictionary + // Binary search for the character. + let lo = nodeIndex; + let hi = lo + branchCount - 1; + while (lo <= hi) { + const mid = (lo + hi) >>> 1; + const midValue = decodeTree[mid]; + if (midValue < char) { + lo = mid + 1; + } + else if (midValue > char) { + hi = mid - 1; + } + else { + return decodeTree[mid + branchCount]; + } + } + return -1; +} +const htmlDecoder = /* #__PURE__ */ getDecoder(decode_data_html_js_1.htmlDecodeTree); +const xmlDecoder = /* #__PURE__ */ getDecoder(decode_data_xml_js_1.xmlDecodeTree); +/** + * Decodes an HTML string. + * + * @param htmlString The string to decode. + * @param mode The decoding mode. + * @returns The decoded string. + */ +function decodeHTML(htmlString, mode = DecodingMode.Legacy) { + return htmlDecoder(htmlString, mode); +} +/** + * Decodes an HTML string in an attribute. + * + * @param htmlAttribute The string to decode. + * @returns The decoded string. + */ +function decodeHTMLAttribute(htmlAttribute) { + return htmlDecoder(htmlAttribute, DecodingMode.Attribute); +} +/** + * Decodes an HTML string, requiring all entities to be terminated by a semicolon. + * + * @param htmlString The string to decode. + * @returns The decoded string. + */ +function decodeHTMLStrict(htmlString) { + return htmlDecoder(htmlString, DecodingMode.Strict); +} +/** + * Decodes an XML string, requiring all entities to be terminated by a semicolon. + * + * @param xmlString The string to decode. + * @returns The decoded string. + */ +function decodeXML(xmlString) { + return xmlDecoder(xmlString, DecodingMode.Strict); +} +// Re-export for use by eg. htmlparser2 +var decode_data_html_js_2 = require("./generated/decode-data-html.js"); +Object.defineProperty(exports, "htmlDecodeTree", { enumerable: true, get: function () { return decode_data_html_js_2.htmlDecodeTree; } }); +var decode_data_xml_js_2 = require("./generated/decode-data-xml.js"); +Object.defineProperty(exports, "xmlDecodeTree", { enumerable: true, get: function () { return decode_data_xml_js_2.xmlDecodeTree; } }); +var decode_codepoint_js_2 = require("./decode-codepoint.js"); +Object.defineProperty(exports, "decodeCodePoint", { enumerable: true, get: function () { return decode_codepoint_js_2.decodeCodePoint; } }); +Object.defineProperty(exports, "replaceCodePoint", { enumerable: true, get: function () { return decode_codepoint_js_2.replaceCodePoint; } }); +Object.defineProperty(exports, "fromCodePoint", { enumerable: true, get: function () { return decode_codepoint_js_2.fromCodePoint; } }); +//# sourceMappingURL=decode.js.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/decode.js.map b/node_modules/webdav/node_modules/entities/dist/commonjs/decode.js.map new file mode 100644 index 00000000..7a5819c3 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/decode.js.map @@ -0,0 +1 @@ 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\ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/encode.d.ts b/node_modules/webdav/node_modules/entities/dist/commonjs/encode.d.ts new file mode 100644 index 00000000..e110bea7 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/encode.d.ts @@ -0,0 +1,22 @@ +/** + * Encodes all characters in the input using HTML entities. This includes + * characters that are valid ASCII characters in HTML documents, such as `#`. + * + * To get a more compact output, consider using the `encodeNonAsciiHTML` + * function, which will only encode characters that are not valid in HTML + * documents, as well as non-ASCII characters. + * + * If a character has no equivalent entity, a numeric hexadecimal reference + * (eg. `ü`) will be used. + */ +export declare function encodeHTML(input: string): string; +/** + * Encodes all non-ASCII characters, as well as characters not valid in HTML + * documents using HTML entities. This function will not encode characters that + * are valid in HTML documents, such as `#`. + * + * If a character has no equivalent entity, a numeric hexadecimal reference + * (eg. `ü`) will be used. + */ +export declare function encodeNonAsciiHTML(input: string): string; +//# sourceMappingURL=encode.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/encode.d.ts.map b/node_modules/webdav/node_modules/entities/dist/commonjs/encode.d.ts.map new file mode 100644 index 00000000..3ef0d10f --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/encode.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"encode.d.ts","sourceRoot":"","sources":["../../src/encode.ts"],"names":[],"mappings":"AAKA;;;;;;;;;;GAUG;AACH,wBAAgB,UAAU,CAAC,KAAK,EAAE,MAAM,GAAG,MAAM,CAEhD;AACD;;;;;;;GAOG;AACH,wBAAgB,kBAAkB,CAAC,KAAK,EAAE,MAAM,GAAG,MAAM,CAExD"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/encode.js b/node_modules/webdav/node_modules/entities/dist/commonjs/encode.js new file mode 100644 index 00000000..cbbe90d6 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/encode.js @@ -0,0 +1,73 @@ +"use strict"; +Object.defineProperty(exports, "__esModule", { value: true }); +exports.encodeHTML = encodeHTML; +exports.encodeNonAsciiHTML = encodeNonAsciiHTML; +const encode_html_js_1 = require("./generated/encode-html.js"); +const escape_js_1 = require("./escape.js"); +const htmlReplacer = /[\t\n\f!-,./:-@[-`{-}\u0080-\uFFFF]/g; +/** + * Encodes all characters in the input using HTML entities. This includes + * characters that are valid ASCII characters in HTML documents, such as `#`. + * + * To get a more compact output, consider using the `encodeNonAsciiHTML` + * function, which will only encode characters that are not valid in HTML + * documents, as well as non-ASCII characters. + * + * If a character has no equivalent entity, a numeric hexadecimal reference + * (eg. `ü`) will be used. + */ +function encodeHTML(input) { + return encodeHTMLTrieRe(htmlReplacer, input); +} +/** + * Encodes all non-ASCII characters, as well as characters not valid in HTML + * documents using HTML entities. This function will not encode characters that + * are valid in HTML documents, such as `#`. + * + * If a character has no equivalent entity, a numeric hexadecimal reference + * (eg. `ü`) will be used. + */ +function encodeNonAsciiHTML(input) { + return encodeHTMLTrieRe(escape_js_1.xmlReplacer, input); +} +function encodeHTMLTrieRe(regExp, input) { + let returnValue = ""; + let lastIndex = 0; + let match; + while ((match = regExp.exec(input)) !== null) { + const { index } = match; + returnValue += input.substring(lastIndex, index); + const char = input.charCodeAt(index); + let next = encode_html_js_1.htmlTrie.get(char); + if (typeof next === "object") { + // We are in a branch. Try to match the next char. + if (index + 1 < input.length) { + const nextChar = input.charCodeAt(index + 1); + const value = typeof next.n === "number" + ? next.n === nextChar + ? next.o + : undefined + : next.n.get(nextChar); + if (value !== undefined) { + returnValue += value; + lastIndex = regExp.lastIndex += 1; + continue; + } + } + next = next.v; + } + // We might have a tree node without a value; skip and use a numeric entity. + if (next === undefined) { + const cp = (0, escape_js_1.getCodePoint)(input, index); + returnValue += `&#x${cp.toString(16)};`; + // Increase by 1 if we have a surrogate pair + lastIndex = regExp.lastIndex += Number(cp !== char); + } + else { + returnValue += next; + lastIndex = index + 1; + } + } + return returnValue + input.substr(lastIndex); +} +//# sourceMappingURL=encode.js.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/encode.js.map b/node_modules/webdav/node_modules/entities/dist/commonjs/encode.js.map new file mode 100644 index 00000000..aa0afcfe --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/encode.js.map @@ -0,0 +1 @@ +{"version":3,"file":"encode.js","sourceRoot":"","sources":["../../src/encode.ts"],"names":[],"mappings":";;AAgBA,gCAEC;AASD,gDAEC;AA7BD,+DAAsD;AACtD,2CAAwD;AAExD,MAAM,YAAY,GAAG,sCAAsC,CAAC;AAE5D;;;;;;;;;;GAUG;AACH,SAAgB,UAAU,CAAC,KAAa;IACpC,OAAO,gBAAgB,CAAC,YAAY,EAAE,KAAK,CAAC,CAAC;AACjD,CAAC;AACD;;;;;;;GAOG;AACH,SAAgB,kBAAkB,CAAC,KAAa;IAC5C,OAAO,gBAAgB,CAAC,uBAAW,EAAE,KAAK,CAAC,CAAC;AAChD,CAAC;AAED,SAAS,gBAAgB,CAAC,MAAc,EAAE,KAAa;IACnD,IAAI,WAAW,GAAG,EAAE,CAAC;IACrB,IAAI,SAAS,GAAG,CAAC,CAAC;IAClB,IAAI,KAAK,CAAC;IAEV,OAAO,CAAC,KAAK,GAAG,MAAM,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC,KAAK,IAAI,EAAE,CAAC;QAC3C,MAAM,EAAE,KAAK,EAAE,GAAG,KAAK,CAAC;QACxB,WAAW,IAAI,KAAK,CAAC,SAAS,CAAC,SAAS,EAAE,KAAK,CAAC,CAAC;QACjD,MAAM,IAAI,GAAG,KAAK,CAAC,UAAU,CAAC,KAAK,CAAC,CAAC;QACrC,IAAI,IAAI,GAAG,yBAAQ,CAAC,GAAG,CAAC,IAAI,CAAC,CAAC;QAE9B,IAAI,OAAO,IAAI,KAAK,QAAQ,EAAE,CAAC;YAC3B,kDAAkD;YAClD,IAAI,KAAK,GAAG,CAAC,GAAG,KAAK,CAAC,MAAM,EAAE,CAAC;gBAC3B,MAAM,QAAQ,GAAG,KAAK,CAAC,UAAU,CAAC,KAAK,GAAG,CAAC,CAAC,CAAC;gBAC7C,MAAM,KAAK,GACP,OAAO,IAAI,CAAC,CAAC,KAAK,QAAQ;oBACtB,CAAC,CAAC,IAAI,CAAC,CAAC,KAAK,QAAQ;wBACjB,CAAC,CAAC,IAAI,CAAC,CAAC;wBACR,CAAC,CAAC,SAAS;oBACf,CAAC,CAAC,IAAI,CAAC,CAAC,CAAC,GAAG,CAAC,QAAQ,CAAC,CAAC;gBAE/B,IAAI,KAAK,KAAK,SAAS,EAAE,CAAC;oBACtB,WAAW,IAAI,KAAK,CAAC;oBACrB,SAAS,GAAG,MAAM,CAAC,SAAS,IAAI,CAAC,CAAC;oBAClC,SAAS;gBACb,CAAC;YACL,CAAC;YAED,IAAI,GAAG,IAAI,CAAC,CAAC,CAAC;QAClB,CAAC;QAED,4EAA4E;QAC5E,IAAI,IAAI,KAAK,SAAS,EAAE,CAAC;YACrB,MAAM,EAAE,GAAG,IAAA,wBAAY,EAAC,KAAK,EAAE,KAAK,CAAC,CAAC;YACtC,WAAW,IAAI,MAAM,EAAE,CAAC,QAAQ,CAAC,EAAE,CAAC,GAAG,CAAC;YACxC,4CAA4C;YAC5C,SAAS,GAAG,MAAM,CAAC,SAAS,IAAI,MAAM,CAAC,EAAE,KAAK,IAAI,CAAC,CAAC;QACxD,CAAC;aAAM,CAAC;YACJ,WAAW,IAAI,IAAI,CAAC;YACpB,SAAS,GAAG,KAAK,GAAG,CAAC,CAAC;QAC1B,CAAC;IACL,CAAC;IAED,OAAO,WAAW,GAAG,KAAK,CAAC,MAAM,CAAC,SAAS,CAAC,CAAC;AACjD,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/escape.d.ts b/node_modules/webdav/node_modules/entities/dist/commonjs/escape.d.ts new file mode 100644 index 00000000..19bfc876 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/escape.d.ts @@ -0,0 +1,43 @@ +export declare const xmlReplacer: RegExp; +export declare const getCodePoint: (c: string, index: number) => number; +/** + * Encodes all non-ASCII characters, as well as characters not valid in XML + * documents using XML entities. + * + * If a character has no equivalent entity, a + * numeric hexadecimal reference (eg. `ü`) will be used. + */ +export declare function encodeXML(input: string): string; +/** + * Encodes all non-ASCII characters, as well as characters not valid in XML + * documents using numeric hexadecimal reference (eg. `ü`). + * + * Have a look at `escapeUTF8` if you want a more concise output at the expense + * of reduced transportability. + * + * @param data String to escape. + */ +export declare const escape: typeof encodeXML; +/** + * Encodes all characters not valid in XML documents using XML entities. + * + * Note that the output will be character-set dependent. + * + * @param data String to escape. + */ +export declare const escapeUTF8: (data: string) => string; +/** + * Encodes all characters that have to be escaped in HTML attributes, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + * + * @param data String to escape. + */ +export declare const escapeAttribute: (data: string) => string; +/** + * Encodes all characters that have to be escaped in HTML text, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + * + * @param data String to escape. + */ +export declare const escapeText: (data: string) => string; +//# sourceMappingURL=escape.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/escape.d.ts.map b/node_modules/webdav/node_modules/entities/dist/commonjs/escape.d.ts.map new file mode 100644 index 00000000..02a129ca --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/escape.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"escape.d.ts","sourceRoot":"","sources":["../../src/escape.ts"],"names":[],"mappings":"AAAA,eAAO,MAAM,WAAW,EAAE,MAAiC,CAAC;AAW5D,eAAO,MAAM,YAAY,EAAE,CAAC,CAAC,EAAE,MAAM,EAAE,KAAK,EAAE,MAAM,KAAK,MAWoB,CAAC;AAE9E;;;;;;GAMG;AACH,wBAAgB,SAAS,CAAC,KAAK,EAAE,MAAM,GAAG,MAAM,CA0B/C;AAED;;;;;;;;GAQG;AACH,eAAO,MAAM,MAAM,EAAE,OAAO,SAAqB,CAAC;AAqClD;;;;;;GAMG;AACH,eAAO,MAAM,UAAU,EAAE,CAAC,IAAI,EAAE,MAAM,KAAK,MAG1C,CAAC;AAEF;;;;;GAKG;AACH,eAAO,MAAM,eAAe,EAAE,CAAC,IAAI,EAAE,MAAM,KAAK,MAQ3C,CAAC;AAEN;;;;;GAKG;AACH,eAAO,MAAM,UAAU,EAAE,CAAC,IAAI,EAAE,MAAM,KAAK,MAQ1C,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/escape.js b/node_modules/webdav/node_modules/entities/dist/commonjs/escape.js new file mode 100644 index 00000000..ff9f8149 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/escape.js @@ -0,0 +1,121 @@ +"use strict"; +Object.defineProperty(exports, "__esModule", { value: true }); +exports.escapeText = exports.escapeAttribute = exports.escapeUTF8 = exports.escape = exports.getCodePoint = exports.xmlReplacer = void 0; +exports.encodeXML = encodeXML; +exports.xmlReplacer = /["$&'<>\u0080-\uFFFF]/g; +const xmlCodeMap = new Map([ + [34, """], + [38, "&"], + [39, "'"], + [60, "<"], + [62, ">"], +]); +// For compatibility with node < 4, we wrap `codePointAt` +exports.getCodePoint = +// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition +String.prototype.codePointAt == null + ? (c, index) => (c.charCodeAt(index) & 64512) === 55296 + ? (c.charCodeAt(index) - 55296) * 1024 + + c.charCodeAt(index + 1) - + 56320 + + 65536 + : c.charCodeAt(index) + : // http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae + (input, index) => input.codePointAt(index); +/** + * Encodes all non-ASCII characters, as well as characters not valid in XML + * documents using XML entities. + * + * If a character has no equivalent entity, a + * numeric hexadecimal reference (eg. `ü`) will be used. + */ +function encodeXML(input) { + let returnValue = ""; + let lastIndex = 0; + let match; + while ((match = exports.xmlReplacer.exec(input)) !== null) { + const { index } = match; + const char = input.charCodeAt(index); + const next = xmlCodeMap.get(char); + if (next === undefined) { + returnValue += `${input.substring(lastIndex, index)}&#x${(0, exports.getCodePoint)(input, index).toString(16)};`; + // Increase by 1 if we have a surrogate pair + lastIndex = exports.xmlReplacer.lastIndex += Number((char & 64512) === 55296); + } + else { + returnValue += input.substring(lastIndex, index) + next; + lastIndex = index + 1; + } + } + return returnValue + input.substr(lastIndex); +} +/** + * Encodes all non-ASCII characters, as well as characters not valid in XML + * documents using numeric hexadecimal reference (eg. `ü`). + * + * Have a look at `escapeUTF8` if you want a more concise output at the expense + * of reduced transportability. + * + * @param data String to escape. + */ +exports.escape = encodeXML; +/** + * Creates a function that escapes all characters matched by the given regular + * expression using the given map of characters to escape to their entities. + * + * @param regex Regular expression to match characters to escape. + * @param map Map of characters to escape to their entities. + * + * @returns Function that escapes all characters matched by the given regular + * expression using the given map of characters to escape to their entities. + */ +function getEscaper(regex, map) { + return function escape(data) { + let match; + let lastIndex = 0; + let result = ""; + while ((match = regex.exec(data))) { + if (lastIndex !== match.index) { + result += data.substring(lastIndex, match.index); + } + // We know that this character will be in the map. + result += map.get(match[0].charCodeAt(0)); + // Every match will be of length 1 + lastIndex = match.index + 1; + } + return result + data.substring(lastIndex); + }; +} +/** + * Encodes all characters not valid in XML documents using XML entities. + * + * Note that the output will be character-set dependent. + * + * @param data String to escape. + */ +exports.escapeUTF8 = getEscaper(/["&'<>]/g, xmlCodeMap); +/** + * Encodes all characters that have to be escaped in HTML attributes, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + * + * @param data String to escape. + */ +exports.escapeAttribute = +/* #__PURE__ */ getEscaper(/["&\u00A0]/g, new Map([ + [34, """], + [38, "&"], + [160, " "], +])); +/** + * Encodes all characters that have to be escaped in HTML text, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + * + * @param data String to escape. + */ +exports.escapeText = getEscaper(/[&<>\u00A0]/g, new Map([ + [38, "&"], + [60, "<"], + [62, ">"], + [160, " "], +])); +//# sourceMappingURL=escape.js.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/escape.js.map b/node_modules/webdav/node_modules/entities/dist/commonjs/escape.js.map new file mode 100644 index 00000000..832692d8 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/escape.js.map @@ -0,0 +1 @@ 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\ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-html.d.ts b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-html.d.ts new file mode 100644 index 00000000..cd095355 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-html.d.ts @@ -0,0 +1,2 @@ +export declare const htmlDecodeTree: Uint16Array; +//# sourceMappingURL=decode-data-html.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-html.d.ts.map b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-html.d.ts.map new file mode 100644 index 00000000..6bb1ecfb --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-html.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"decode-data-html.d.ts","sourceRoot":"","sources":["../../../src/generated/decode-data-html.ts"],"names":[],"mappings":"AAEA,eAAO,MAAM,cAAc,EAAE,WAK5B,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-html.js b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-html.js new file mode 100644 index 00000000..f79d0607 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-html.js @@ -0,0 +1,10 @@ +"use strict"; +// Generated using scripts/write-decode-map.ts +Object.defineProperty(exports, "__esModule", { value: true }); +exports.htmlDecodeTree = void 0; +exports.htmlDecodeTree = new Uint16Array( +// prettier-ignore +/* #__PURE__ */ 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+ .split("") + .map((c) => c.charCodeAt(0))); +//# sourceMappingURL=decode-data-html.js.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-html.js.map b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-html.js.map new file mode 100644 index 00000000..a5280ca2 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-html.js.map @@ -0,0 +1 @@ +{"version":3,"file":"decode-data-html.js","sourceRoot":"","sources":["../../../src/generated/decode-data-html.ts"],"names":[],"mappings":";AAAA,8CAA8C;;;AAEjC,QAAA,cAAc,GAAgC,IAAI,WAAW;AACtE,kBAAkB;AAClB,eAAe,CAAC,268CAA268C;KACt78C,KAAK,CAAC,EAAE,CAAC;KACT,GAAG,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,CAAC,CAAC,UAAU,CAAC,CAAC,CAAC,CAAC,CACnC,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-xml.d.ts b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-xml.d.ts new file mode 100644 index 00000000..6467acc1 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-xml.d.ts @@ -0,0 +1,2 @@ +export declare const xmlDecodeTree: Uint16Array; +//# sourceMappingURL=decode-data-xml.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-xml.d.ts.map b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-xml.d.ts.map new file mode 100644 index 00000000..29885091 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-xml.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"decode-data-xml.d.ts","sourceRoot":"","sources":["../../../src/generated/decode-data-xml.ts"],"names":[],"mappings":"AAEA,eAAO,MAAM,aAAa,EAAE,WAK3B,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-xml.js b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-xml.js new file mode 100644 index 00000000..6f64e469 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-xml.js @@ -0,0 +1,10 @@ +"use strict"; +// Generated using scripts/write-decode-map.ts +Object.defineProperty(exports, "__esModule", { value: true }); +exports.xmlDecodeTree = void 0; +exports.xmlDecodeTree = new Uint16Array( +// prettier-ignore +/* #__PURE__ */ "\u0200aglq\t\x15\x18\x1b\u026d\x0f\0\0\x12p;\u4026os;\u4027t;\u403et;\u403cuot;\u4022" + .split("") + .map((c) => c.charCodeAt(0))); +//# sourceMappingURL=decode-data-xml.js.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-xml.js.map b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-xml.js.map new file mode 100644 index 00000000..e74e3dd6 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/decode-data-xml.js.map @@ -0,0 +1 @@ +{"version":3,"file":"decode-data-xml.js","sourceRoot":"","sources":["../../../src/generated/decode-data-xml.ts"],"names":[],"mappings":";AAAA,8CAA8C;;;AAEjC,QAAA,aAAa,GAAgC,IAAI,WAAW;AACrE,kBAAkB;AAClB,eAAe,CAAC,uFAAuF;KAClG,KAAK,CAAC,EAAE,CAAC;KACT,GAAG,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,CAAC,CAAC,UAAU,CAAC,CAAC,CAAC,CAAC,CACnC,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/generated/encode-html.d.ts b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/encode-html.d.ts new file mode 100644 index 00000000..a648e2b1 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/encode-html.d.ts @@ -0,0 +1,8 @@ +type EncodeTrieNode = string | { + v?: string; + n: number | Map; + o?: string; +}; +export declare const htmlTrie: Map; +export {}; +//# sourceMappingURL=encode-html.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/generated/encode-html.d.ts.map b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/encode-html.d.ts.map new file mode 100644 index 00000000..e19fef96 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/encode-html.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"encode-html.d.ts","sourceRoot":"","sources":["../../../src/generated/encode-html.ts"],"names":[],"mappings":"AAEA,KAAK,cAAc,GACb,MAAM,GACN;IAAE,CAAC,CAAC,EAAE,MAAM,CAAC;IAAC,CAAC,EAAE,MAAM,GAAG,GAAG,CAAC,MAAM,EAAE,cAAc,CAAC,CAAC;IAAC,CAAC,CAAC,EAAE,MAAM,CAAA;CAAE,CAAC;AAY1E,eAAO,MAAM,QAAQ,EAAE,GAAG,CAAC,MAAM,EAAC,cAAc,CAAwhuB,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/generated/encode-html.js b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/encode-html.js new file mode 100644 index 00000000..cc2de8ab --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/generated/encode-html.js @@ -0,0 +1,13 @@ +"use strict"; +// Generated using scripts/write-encode-map.ts +Object.defineProperty(exports, "__esModule", { value: true }); +exports.htmlTrie = void 0; +function restoreDiff(array) { + for (let index = 1; index < array.length; index++) { + array[index][0] += array[index - 1][0] + 1; + } + return array; +} +// prettier-ignore +exports.htmlTrie = new Map(/* #__PURE__ */ restoreDiff([[9, " "], [0, " "], [22, "!"], [0, """], [0, "#"], [0, "$"], [0, "%"], [0, "&"], [0, "'"], [0, "("], [0, ")"], [0, "*"], [0, "+"], [0, ","], [1, "."], [0, "/"], [10, ":"], [0, ";"], [0, { v: "<", n: 8402, o: "<⃒" }], [0, { v: "=", n: 8421, o: "=⃥" }], [0, { v: ">", n: 8402, o: ">⃒" }], [0, "?"], [0, "@"], [26, "["], [0, "\"], [0, "]"], [0, "^"], [0, "_"], [0, "`"], [5, { n: 106, o: "fj" }], [20, "{"], [0, "|"], [0, "}"], [34, " "], [0, "¡"], [0, "¢"], 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\ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/index.d.ts b/node_modules/webdav/node_modules/entities/dist/commonjs/index.d.ts new file mode 100644 index 00000000..bdb9ab76 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/index.d.ts @@ -0,0 +1,96 @@ +import { DecodingMode } from "./decode.js"; +/** The level of entities to support. */ +export declare enum EntityLevel { + /** Support only XML entities. */ + XML = 0, + /** Support HTML entities, which are a superset of XML entities. */ + HTML = 1 +} +export declare enum EncodingMode { + /** + * The output is UTF-8 encoded. Only characters that need escaping within + * XML will be escaped. + */ + UTF8 = 0, + /** + * The output consists only of ASCII characters. Characters that need + * escaping within HTML, and characters that aren't ASCII characters will + * be escaped. + */ + ASCII = 1, + /** + * Encode all characters that have an equivalent entity, as well as all + * characters that are not ASCII characters. + */ + Extensive = 2, + /** + * Encode all characters that have to be escaped in HTML attributes, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + */ + Attribute = 3, + /** + * Encode all characters that have to be escaped in HTML text, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + */ + Text = 4 +} +export interface DecodingOptions { + /** + * The level of entities to support. + * @default {@link EntityLevel.XML} + */ + level?: EntityLevel; + /** + * Decoding mode. If `Legacy`, will support legacy entities not terminated + * with a semicolon (`;`). + * + * Always `Strict` for XML. For HTML, set this to `true` if you are parsing + * an attribute value. + * + * The deprecated `decodeStrict` function defaults this to `Strict`. + * + * @default {@link DecodingMode.Legacy} + */ + mode?: DecodingMode | undefined; +} +/** + * Decodes a string with entities. + * + * @param input String to decode. + * @param options Decoding options. + */ +export declare function decode(input: string, options?: DecodingOptions | EntityLevel): string; +/** + * Decodes a string with entities. Does not allow missing trailing semicolons for entities. + * + * @param input String to decode. + * @param options Decoding options. + * @deprecated Use `decode` with the `mode` set to `Strict`. + */ +export declare function decodeStrict(input: string, options?: DecodingOptions | EntityLevel): string; +/** + * Options for `encode`. + */ +export interface EncodingOptions { + /** + * The level of entities to support. + * @default {@link EntityLevel.XML} + */ + level?: EntityLevel; + /** + * Output format. + * @default {@link EncodingMode.Extensive} + */ + mode?: EncodingMode; +} +/** + * Encodes a string with entities. + * + * @param input String to encode. + * @param options Encoding options. + */ +export declare function encode(input: string, options?: EncodingOptions | EntityLevel): string; +export { encodeXML, escape, escapeUTF8, escapeAttribute, escapeText, } from "./escape.js"; +export { encodeHTML, encodeNonAsciiHTML, encodeHTML as encodeHTML4, encodeHTML as encodeHTML5, } from "./encode.js"; +export { EntityDecoder, DecodingMode, decodeXML, decodeHTML, decodeHTMLStrict, decodeHTMLAttribute, decodeHTML as decodeHTML4, decodeHTML as decodeHTML5, decodeHTMLStrict as decodeHTML4Strict, decodeHTMLStrict as decodeHTML5Strict, decodeXML as decodeXMLStrict, } from "./decode.js"; +//# sourceMappingURL=index.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/index.d.ts.map b/node_modules/webdav/node_modules/entities/dist/commonjs/index.d.ts.map new file mode 100644 index 00000000..7b9b63f5 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/index.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"index.d.ts","sourceRoot":"","sources":["../../src/index.ts"],"names":[],"mappings":"AAAA,OAAO,EAAyB,YAAY,EAAE,MAAM,aAAa,CAAC;AASlE,wCAAwC;AACxC,oBAAY,WAAW;IACnB,iCAAiC;IACjC,GAAG,IAAI;IACP,mEAAmE;IACnE,IAAI,IAAI;CACX;AAED,oBAAY,YAAY;IACpB;;;OAGG;IACH,IAAI,IAAA;IACJ;;;;OAIG;IACH,KAAK,IAAA;IACL;;;OAGG;IACH,SAAS,IAAA;IACT;;;OAGG;IACH,SAAS,IAAA;IACT;;;OAGG;IACH,IAAI,IAAA;CACP;AAED,MAAM,WAAW,eAAe;IAC5B;;;OAGG;IACH,KAAK,CAAC,EAAE,WAAW,CAAC;IACpB;;;;;;;;;;OAUG;IACH,IAAI,CAAC,EAAE,YAAY,GAAG,SAAS,CAAC;CACnC;AAED;;;;;GAKG;AACH,wBAAgB,MAAM,CAClB,KAAK,EAAE,MAAM,EACb,OAAO,GAAE,eAAe,GAAG,WAA6B,GACzD,MAAM,CASR;AAED;;;;;;GAMG;AACH,wBAAgB,YAAY,CACxB,KAAK,EAAE,MAAM,EACb,OAAO,GAAE,eAAe,GAAG,WAA6B,GACzD,MAAM,CAMR;AAED;;GAEG;AACH,MAAM,WAAW,eAAe;IAC5B;;;OAGG;IACH,KAAK,CAAC,EAAE,WAAW,CAAC;IACpB;;;OAGG;IACH,IAAI,CAAC,EAAE,YAAY,CAAC;CACvB;AAED;;;;;GAKG;AACH,wBAAgB,MAAM,CAClB,KAAK,EAAE,MAAM,EACb,OAAO,GAAE,eAAe,GAAG,WAA6B,GACzD,MAAM,CA2BR;AAED,OAAO,EACH,SAAS,EACT,MAAM,EACN,UAAU,EACV,eAAe,EACf,UAAU,GACb,MAAM,aAAa,CAAC;AAErB,OAAO,EACH,UAAU,EACV,kBAAkB,EAElB,UAAU,IAAI,WAAW,EACzB,UAAU,IAAI,WAAW,GAC5B,MAAM,aAAa,CAAC;AAErB,OAAO,EACH,aAAa,EACb,YAAY,EACZ,SAAS,EACT,UAAU,EACV,gBAAgB,EAChB,mBAAmB,EAEnB,UAAU,IAAI,WAAW,EACzB,UAAU,IAAI,WAAW,EACzB,gBAAgB,IAAI,iBAAiB,EACrC,gBAAgB,IAAI,iBAAiB,EACrC,SAAS,IAAI,eAAe,GAC/B,MAAM,aAAa,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/index.js b/node_modules/webdav/node_modules/entities/dist/commonjs/index.js new file mode 100644 index 00000000..8637dcfc --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/index.js @@ -0,0 +1,131 @@ +"use strict"; +Object.defineProperty(exports, "__esModule", { value: true }); +exports.decodeXMLStrict = exports.decodeHTML5Strict = exports.decodeHTML4Strict = exports.decodeHTML5 = exports.decodeHTML4 = exports.decodeHTMLAttribute = exports.decodeHTMLStrict = exports.decodeHTML = exports.decodeXML = exports.DecodingMode = exports.EntityDecoder = exports.encodeHTML5 = exports.encodeHTML4 = exports.encodeNonAsciiHTML = exports.encodeHTML = exports.escapeText = exports.escapeAttribute = exports.escapeUTF8 = exports.encodeXML = exports.EncodingMode = exports.EntityLevel = void 0; +exports.decode = decode; +exports.decodeStrict = decodeStrict; +exports.encode = encode; +const decode_js_1 = require("./decode.js"); +const encode_js_1 = require("./encode.js"); +const escape_js_1 = require("./escape.js"); +/** The level of entities to support. */ +var EntityLevel; +(function (EntityLevel) { + /** Support only XML entities. */ + EntityLevel[EntityLevel["XML"] = 0] = "XML"; + /** Support HTML entities, which are a superset of XML entities. */ + EntityLevel[EntityLevel["HTML"] = 1] = "HTML"; +})(EntityLevel || (exports.EntityLevel = EntityLevel = {})); +var EncodingMode; +(function (EncodingMode) { + /** + * The output is UTF-8 encoded. Only characters that need escaping within + * XML will be escaped. + */ + EncodingMode[EncodingMode["UTF8"] = 0] = "UTF8"; + /** + * The output consists only of ASCII characters. Characters that need + * escaping within HTML, and characters that aren't ASCII characters will + * be escaped. + */ + EncodingMode[EncodingMode["ASCII"] = 1] = "ASCII"; + /** + * Encode all characters that have an equivalent entity, as well as all + * characters that are not ASCII characters. + */ + EncodingMode[EncodingMode["Extensive"] = 2] = "Extensive"; + /** + * Encode all characters that have to be escaped in HTML attributes, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + */ + EncodingMode[EncodingMode["Attribute"] = 3] = "Attribute"; + /** + * Encode all characters that have to be escaped in HTML text, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + */ + EncodingMode[EncodingMode["Text"] = 4] = "Text"; +})(EncodingMode || (exports.EncodingMode = EncodingMode = {})); +/** + * Decodes a string with entities. + * + * @param input String to decode. + * @param options Decoding options. + */ +function decode(input, options = EntityLevel.XML) { + const level = typeof options === "number" ? options : options.level; + if (level === EntityLevel.HTML) { + const mode = typeof options === "object" ? options.mode : undefined; + return (0, decode_js_1.decodeHTML)(input, mode); + } + return (0, decode_js_1.decodeXML)(input); +} +/** + * Decodes a string with entities. Does not allow missing trailing semicolons for entities. + * + * @param input String to decode. + * @param options Decoding options. + * @deprecated Use `decode` with the `mode` set to `Strict`. + */ +function decodeStrict(input, options = EntityLevel.XML) { + var _a; + const normalizedOptions = typeof options === "number" ? { level: options } : options; + (_a = normalizedOptions.mode) !== null && _a !== void 0 ? _a : (normalizedOptions.mode = decode_js_1.DecodingMode.Strict); + return decode(input, normalizedOptions); +} +/** + * Encodes a string with entities. + * + * @param input String to encode. + * @param options Encoding options. + */ +function encode(input, options = EntityLevel.XML) { + const { mode = EncodingMode.Extensive, level = EntityLevel.XML } = typeof options === "number" ? { level: options } : options; + switch (mode) { + case EncodingMode.UTF8: { + return (0, escape_js_1.escapeUTF8)(input); + } + case EncodingMode.Attribute: { + return (0, escape_js_1.escapeAttribute)(input); + } + case EncodingMode.Text: { + return (0, escape_js_1.escapeText)(input); + } + case EncodingMode.ASCII: { + return level === EntityLevel.HTML + ? (0, encode_js_1.encodeNonAsciiHTML)(input) + : (0, escape_js_1.encodeXML)(input); + } + // eslint-disable-next-line unicorn/no-useless-switch-case + case EncodingMode.Extensive: + default: { + return level === EntityLevel.HTML + ? (0, encode_js_1.encodeHTML)(input) + : (0, escape_js_1.encodeXML)(input); + } + } +} +var escape_js_2 = require("./escape.js"); +Object.defineProperty(exports, "encodeXML", { enumerable: true, get: function () { return escape_js_2.encodeXML; } }); +Object.defineProperty(exports, "escape", { enumerable: true, get: function () { return escape_js_2.escape; } }); +Object.defineProperty(exports, "escapeUTF8", { enumerable: true, get: function () { return escape_js_2.escapeUTF8; } }); +Object.defineProperty(exports, "escapeAttribute", { enumerable: true, get: function () { return escape_js_2.escapeAttribute; } }); +Object.defineProperty(exports, "escapeText", { enumerable: true, get: function () { return escape_js_2.escapeText; } }); +var encode_js_2 = require("./encode.js"); +Object.defineProperty(exports, "encodeHTML", { enumerable: true, get: function () { return encode_js_2.encodeHTML; } }); +Object.defineProperty(exports, "encodeNonAsciiHTML", { enumerable: true, get: function () { return encode_js_2.encodeNonAsciiHTML; } }); +// Legacy aliases (deprecated) +Object.defineProperty(exports, "encodeHTML4", { enumerable: true, get: function () { return encode_js_2.encodeHTML; } }); +Object.defineProperty(exports, "encodeHTML5", { enumerable: true, get: function () { return encode_js_2.encodeHTML; } }); +var decode_js_2 = require("./decode.js"); +Object.defineProperty(exports, "EntityDecoder", { enumerable: true, get: function () { return decode_js_2.EntityDecoder; } }); +Object.defineProperty(exports, "DecodingMode", { enumerable: true, get: function () { return decode_js_2.DecodingMode; } }); +Object.defineProperty(exports, "decodeXML", { enumerable: true, get: function () { return decode_js_2.decodeXML; } }); +Object.defineProperty(exports, "decodeHTML", { enumerable: true, get: function () { return decode_js_2.decodeHTML; } }); +Object.defineProperty(exports, "decodeHTMLStrict", { enumerable: true, get: function () { return decode_js_2.decodeHTMLStrict; } }); +Object.defineProperty(exports, "decodeHTMLAttribute", { enumerable: true, get: function () { return decode_js_2.decodeHTMLAttribute; } }); +// Legacy aliases (deprecated) +Object.defineProperty(exports, "decodeHTML4", { enumerable: true, get: function () { return decode_js_2.decodeHTML; } }); +Object.defineProperty(exports, "decodeHTML5", { enumerable: true, get: function () { return decode_js_2.decodeHTML; } }); +Object.defineProperty(exports, "decodeHTML4Strict", { enumerable: true, get: function () { return decode_js_2.decodeHTMLStrict; } }); +Object.defineProperty(exports, "decodeHTML5Strict", { enumerable: true, get: function () { return decode_js_2.decodeHTMLStrict; } }); +Object.defineProperty(exports, "decodeXMLStrict", { enumerable: true, get: function () { return decode_js_2.decodeXML; } }); +//# sourceMappingURL=index.js.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/index.js.map b/node_modules/webdav/node_modules/entities/dist/commonjs/index.js.map new file mode 100644 index 00000000..d3b444d3 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/index.js.map @@ -0,0 +1 @@ +{"version":3,"file":"index.js","sourceRoot":"","sources":["../../src/index.ts"],"names":[],"mappings":";;;AAwEA,wBAYC;AASD,oCASC;AAwBD,wBA8BC;AA5JD,2CAAkE;AAClE,2CAA6D;AAC7D,2CAKqB;AAErB,wCAAwC;AACxC,IAAY,WAKX;AALD,WAAY,WAAW;IACnB,iCAAiC;IACjC,2CAAO,CAAA;IACP,mEAAmE;IACnE,6CAAQ,CAAA;AACZ,CAAC,EALW,WAAW,2BAAX,WAAW,QAKtB;AAED,IAAY,YA2BX;AA3BD,WAAY,YAAY;IACpB;;;OAGG;IACH,+CAAI,CAAA;IACJ;;;;OAIG;IACH,iDAAK,CAAA;IACL;;;OAGG;IACH,yDAAS,CAAA;IACT;;;OAGG;IACH,yDAAS,CAAA;IACT;;;OAGG;IACH,+CAAI,CAAA;AACR,CAAC,EA3BW,YAAY,4BAAZ,YAAY,QA2BvB;AAsBD;;;;;GAKG;AACH,SAAgB,MAAM,CAClB,KAAa,EACb,UAAyC,WAAW,CAAC,GAAG;IAExD,MAAM,KAAK,GAAG,OAAO,OAAO,KAAK,QAAQ,CAAC,CAAC,CAAC,OAAO,CAAC,CAAC,CAAC,OAAO,CAAC,KAAK,CAAC;IAEpE,IAAI,KAAK,KAAK,WAAW,CAAC,IAAI,EAAE,CAAC;QAC7B,MAAM,IAAI,GAAG,OAAO,OAAO,KAAK,QAAQ,CAAC,CAAC,CAAC,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,SAAS,CAAC;QACpE,OAAO,IAAA,sBAAU,EAAC,KAAK,EAAE,IAAI,CAAC,CAAC;IACnC,CAAC;IAED,OAAO,IAAA,qBAAS,EAAC,KAAK,CAAC,CAAC;AAC5B,CAAC;AAED;;;;;;GAMG;AACH,SAAgB,YAAY,CACxB,KAAa,EACb,UAAyC,WAAW,CAAC,GAAG;;IAExD,MAAM,iBAAiB,GACnB,OAAO,OAAO,KAAK,QAAQ,CAAC,CAAC,CAAC,EAAE,KAAK,EAAE,OAAO,EAAE,CAAC,CAAC,CAAC,OAAO,CAAC;IAC/D,MAAA,iBAAiB,CAAC,IAAI,oCAAtB,iBAAiB,CAAC,IAAI,GAAK,wBAAY,CAAC,MAAM,EAAC;IAE/C,OAAO,MAAM,CAAC,KAAK,EAAE,iBAAiB,CAAC,CAAC;AAC5C,CAAC;AAkBD;;;;;GAKG;AACH,SAAgB,MAAM,CAClB,KAAa,EACb,UAAyC,WAAW,CAAC,GAAG;IAExD,MAAM,EAAE,IAAI,GAAG,YAAY,CAAC,SAAS,EAAE,KAAK,GAAG,WAAW,CAAC,GAAG,EAAE,GAC5D,OAAO,OAAO,KAAK,QAAQ,CAAC,CAAC,CAAC,EAAE,KAAK,EAAE,OAAO,EAAE,CAAC,CAAC,CAAC,OAAO,CAAC;IAE/D,QAAQ,IAAI,EAAE,CAAC;QACX,KAAK,YAAY,CAAC,IAAI,CAAC,CAAC,CAAC;YACrB,OAAO,IAAA,sBAAU,EAAC,KAAK,CAAC,CAAC;QAC7B,CAAC;QACD,KAAK,YAAY,CAAC,SAAS,CAAC,CAAC,CAAC;YAC1B,OAAO,IAAA,2BAAe,EAAC,KAAK,CAAC,CAAC;QAClC,CAAC;QACD,KAAK,YAAY,CAAC,IAAI,CAAC,CAAC,CAAC;YACrB,OAAO,IAAA,sBAAU,EAAC,KAAK,CAAC,CAAC;QAC7B,CAAC;QACD,KAAK,YAAY,CAAC,KAAK,CAAC,CAAC,CAAC;YACtB,OAAO,KAAK,KAAK,WAAW,CAAC,IAAI;gBAC7B,CAAC,CAAC,IAAA,8BAAkB,EAAC,KAAK,CAAC;gBAC3B,CAAC,CAAC,IAAA,qBAAS,EAAC,KAAK,CAAC,CAAC;QAC3B,CAAC;QACD,0DAA0D;QAC1D,KAAK,YAAY,CAAC,SAAS,CAAC;QAC5B,OAAO,CAAC,CAAC,CAAC;YACN,OAAO,KAAK,KAAK,WAAW,CAAC,IAAI;gBAC7B,CAAC,CAAC,IAAA,sBAAU,EAAC,KAAK,CAAC;gBACnB,CAAC,CAAC,IAAA,qBAAS,EAAC,KAAK,CAAC,CAAC;QAC3B,CAAC;IACL,CAAC;AACL,CAAC;AAED,yCAMqB;AALjB,sGAAA,SAAS,OAAA;AACT,mGAAA,MAAM,OAAA;AACN,uGAAA,UAAU,OAAA;AACV,4GAAA,eAAe,OAAA;AACf,uGAAA,UAAU,OAAA;AAGd,yCAMqB;AALjB,uGAAA,UAAU,OAAA;AACV,+GAAA,kBAAkB,OAAA;AAClB,8BAA8B;AAC9B,wGAAA,UAAU,OAAe;AACzB,wGAAA,UAAU,OAAe;AAG7B,yCAaqB;AAZjB,0GAAA,aAAa,OAAA;AACb,yGAAA,YAAY,OAAA;AACZ,sGAAA,SAAS,OAAA;AACT,uGAAA,UAAU,OAAA;AACV,6GAAA,gBAAgB,OAAA;AAChB,gHAAA,mBAAmB,OAAA;AACnB,8BAA8B;AAC9B,wGAAA,UAAU,OAAe;AACzB,wGAAA,UAAU,OAAe;AACzB,8GAAA,gBAAgB,OAAqB;AACrC,8GAAA,gBAAgB,OAAqB;AACrC,4GAAA,SAAS,OAAmB"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/commonjs/package.json b/node_modules/webdav/node_modules/entities/dist/commonjs/package.json new file mode 100644 index 00000000..5bbefffb --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/commonjs/package.json @@ -0,0 +1,3 @@ +{ + "type": "commonjs" +} diff --git a/node_modules/webdav/node_modules/entities/dist/esm/decode-codepoint.d.ts b/node_modules/webdav/node_modules/entities/dist/esm/decode-codepoint.d.ts new file mode 100644 index 00000000..32f77c95 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/decode-codepoint.d.ts @@ -0,0 +1,19 @@ +/** + * Polyfill for `String.fromCodePoint`. It is used to create a string from a Unicode code point. + */ +export declare const fromCodePoint: (...codePoints: number[]) => string; +/** + * Replace the given code point with a replacement character if it is a + * surrogate or is outside the valid range. Otherwise return the code + * point unchanged. + */ +export declare function replaceCodePoint(codePoint: number): number; +/** + * Replace the code point if relevant, then convert it to a string. + * + * @deprecated Use `fromCodePoint(replaceCodePoint(codePoint))` instead. + * @param codePoint The code point to decode. + * @returns The decoded code point. + */ +export declare function decodeCodePoint(codePoint: number): string; +//# sourceMappingURL=decode-codepoint.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/decode-codepoint.d.ts.map b/node_modules/webdav/node_modules/entities/dist/esm/decode-codepoint.d.ts.map new file mode 100644 index 00000000..3518e578 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/decode-codepoint.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"decode-codepoint.d.ts","sourceRoot":"","sources":["../../src/decode-codepoint.ts"],"names":[],"mappings":"AAkCA;;GAEG;AACH,eAAO,MAAM,aAAa,EAAE,CAAC,GAAG,UAAU,EAAE,MAAM,EAAE,KAAK,MAgBpD,CAAC;AAEN;;;;GAIG;AACH,wBAAgB,gBAAgB,CAAC,SAAS,EAAE,MAAM,GAAG,MAAM,CAS1D;AAED;;;;;;GAMG;AACH,wBAAgB,eAAe,CAAC,SAAS,EAAE,MAAM,GAAG,MAAM,CAEzD"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/decode-codepoint.js b/node_modules/webdav/node_modules/entities/dist/esm/decode-codepoint.js new file mode 100644 index 00000000..561233d7 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/decode-codepoint.js @@ -0,0 +1,72 @@ +// Adapted from https://github.com/mathiasbynens/he/blob/36afe179392226cf1b6ccdb16ebbb7a5a844d93a/src/he.js#L106-L134 +var _a; +const decodeMap = new Map([ + [0, 65533], + // C1 Unicode control character reference replacements + [128, 8364], + [130, 8218], + [131, 402], + [132, 8222], + [133, 8230], + [134, 8224], + [135, 8225], + [136, 710], + [137, 8240], + [138, 352], + [139, 8249], + [140, 338], + [142, 381], + [145, 8216], + [146, 8217], + [147, 8220], + [148, 8221], + [149, 8226], + [150, 8211], + [151, 8212], + [152, 732], + [153, 8482], + [154, 353], + [155, 8250], + [156, 339], + [158, 382], + [159, 376], +]); +/** + * Polyfill for `String.fromCodePoint`. It is used to create a string from a Unicode code point. + */ +export const fromCodePoint = +// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition, n/no-unsupported-features/es-builtins +(_a = String.fromCodePoint) !== null && _a !== void 0 ? _a : function (codePoint) { + let output = ""; + if (codePoint > 65535) { + codePoint -= 65536; + output += String.fromCharCode(((codePoint >>> 10) & 1023) | 55296); + codePoint = 56320 | (codePoint & 1023); + } + output += String.fromCharCode(codePoint); + return output; +}; +/** + * Replace the given code point with a replacement character if it is a + * surrogate or is outside the valid range. Otherwise return the code + * point unchanged. + */ +export function replaceCodePoint(codePoint) { + var _a; + if ((codePoint >= 55296 && codePoint <= 57343) || + codePoint > 1114111) { + return 65533; + } + return (_a = decodeMap.get(codePoint)) !== null && _a !== void 0 ? _a : codePoint; +} +/** + * Replace the code point if relevant, then convert it to a string. + * + * @deprecated Use `fromCodePoint(replaceCodePoint(codePoint))` instead. + * @param codePoint The code point to decode. + * @returns The decoded code point. + */ +export function decodeCodePoint(codePoint) { + return fromCodePoint(replaceCodePoint(codePoint)); +} +//# sourceMappingURL=decode-codepoint.js.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/decode-codepoint.js.map b/node_modules/webdav/node_modules/entities/dist/esm/decode-codepoint.js.map new file mode 100644 index 00000000..b807f8cf --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/decode-codepoint.js.map @@ -0,0 +1 @@ +{"version":3,"file":"decode-codepoint.js","sourceRoot":"","sources":["../../src/decode-codepoint.ts"],"names":[],"mappings":"AAAA,qHAAqH;;AAErH,MAAM,SAAS,GAAG,IAAI,GAAG,CAAC;IACtB,CAAC,CAAC,EAAE,KAAM,CAAC;IACX,sDAAsD;IACtD,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,IAAI,CAAC;IACX,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,GAAG,CAAC;IACV,CAAC,GAAG,EAAE,GAAG,CAAC;CACb,CAAC,CAAC;AAEH;;GAEG;AACH,MAAM,CAAC,MAAM,aAAa;AACtB,8GAA8G;AAC9G,MAAA,MAAM,CAAC,aAAa,mCACpB,UAAU,SAAiB;IACvB,IAAI,MAAM,GAAG,EAAE,CAAC;IAEhB,IAAI,SAAS,GAAG,KAAO,EAAE,CAAC;QACtB,SAAS,IAAI,KAAS,CAAC;QACvB,MAAM,IAAI,MAAM,CAAC,YAAY,CACzB,CAAC,CAAC,SAAS,KAAK,EAAE,CAAC,GAAG,IAAM,CAAC,GAAG,KAAO,CAC1C,CAAC;QACF,SAAS,GAAG,KAAO,GAAG,CAAC,SAAS,GAAG,IAAM,CAAC,CAAC;IAC/C,CAAC;IAED,MAAM,IAAI,MAAM,CAAC,YAAY,CAAC,SAAS,CAAC,CAAC;IACzC,OAAO,MAAM,CAAC;AAClB,CAAC,CAAC;AAEN;;;;GAIG;AACH,MAAM,UAAU,gBAAgB,CAAC,SAAiB;;IAC9C,IACI,CAAC,SAAS,IAAI,KAAO,IAAI,SAAS,IAAI,KAAO,CAAC;QAC9C,SAAS,GAAG,OAAU,EACxB,CAAC;QACC,OAAO,KAAO,CAAC;IACnB,CAAC;IAED,OAAO,MAAA,SAAS,CAAC,GAAG,CAAC,SAAS,CAAC,mCAAI,SAAS,CAAC;AACjD,CAAC;AAED;;;;;;GAMG;AACH,MAAM,UAAU,eAAe,CAAC,SAAiB;IAC7C,OAAO,aAAa,CAAC,gBAAgB,CAAC,SAAS,CAAC,CAAC,CAAC;AACtD,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/decode.d.ts b/node_modules/webdav/node_modules/entities/dist/esm/decode.d.ts new file mode 100644 index 00000000..96c160c1 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/decode.d.ts @@ -0,0 +1,209 @@ +export declare enum BinTrieFlags { + VALUE_LENGTH = 49152, + BRANCH_LENGTH = 16256, + JUMP_TABLE = 127 +} +export declare enum DecodingMode { + /** Entities in text nodes that can end with any character. */ + Legacy = 0, + /** Only allow entities terminated with a semicolon. */ + Strict = 1, + /** Entities in attributes have limitations on ending characters. */ + Attribute = 2 +} +/** + * Producers for character reference errors as defined in the HTML spec. + */ +export interface EntityErrorProducer { + missingSemicolonAfterCharacterReference(): void; + absenceOfDigitsInNumericCharacterReference(consumedCharacters: number): void; + validateNumericCharacterReference(code: number): void; +} +/** + * Token decoder with support of writing partial entities. + */ +export declare class EntityDecoder { + /** The tree used to decode entities. */ + private readonly decodeTree; + /** + * The function that is called when a codepoint is decoded. + * + * For multi-byte named entities, this will be called multiple times, + * with the second codepoint, and the same `consumed` value. + * + * @param codepoint The decoded codepoint. + * @param consumed The number of bytes consumed by the decoder. + */ + private readonly emitCodePoint; + /** An object that is used to produce errors. */ + private readonly errors?; + constructor( + /** The tree used to decode entities. */ + decodeTree: Uint16Array, + /** + * The function that is called when a codepoint is decoded. + * + * For multi-byte named entities, this will be called multiple times, + * with the second codepoint, and the same `consumed` value. + * + * @param codepoint The decoded codepoint. + * @param consumed The number of bytes consumed by the decoder. + */ + emitCodePoint: (cp: number, consumed: number) => void, + /** An object that is used to produce errors. */ + errors?: EntityErrorProducer | undefined); + /** The current state of the decoder. */ + private state; + /** Characters that were consumed while parsing an entity. */ + private consumed; + /** + * The result of the entity. + * + * Either the result index of a numeric entity, or the codepoint of a + * numeric entity. + */ + private result; + /** The current index in the decode tree. */ + private treeIndex; + /** The number of characters that were consumed in excess. */ + private excess; + /** The mode in which the decoder is operating. */ + private decodeMode; + /** Resets the instance to make it reusable. */ + startEntity(decodeMode: DecodingMode): void; + /** + * Write an entity to the decoder. This can be called multiple times with partial entities. + * If the entity is incomplete, the decoder will return -1. + * + * Mirrors the implementation of `getDecoder`, but with the ability to stop decoding if the + * entity is incomplete, and resume when the next string is written. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The offset at which the entity begins. Should be 0 if this is not the first call. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + write(input: string, offset: number): number; + /** + * Switches between the numeric decimal and hexadecimal states. + * + * Equivalent to the `Numeric character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + private stateNumericStart; + private addToNumericResult; + /** + * Parses a hexadecimal numeric entity. + * + * Equivalent to the `Hexademical character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + private stateNumericHex; + /** + * Parses a decimal numeric entity. + * + * Equivalent to the `Decimal character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + private stateNumericDecimal; + /** + * Validate and emit a numeric entity. + * + * Implements the logic from the `Hexademical character reference start + * state` and `Numeric character reference end state` in the HTML spec. + * + * @param lastCp The last code point of the entity. Used to see if the + * entity was terminated with a semicolon. + * @param expectedLength The minimum number of characters that should be + * consumed. Used to validate that at least one digit + * was consumed. + * @returns The number of characters that were consumed. + */ + private emitNumericEntity; + /** + * Parses a named entity. + * + * Equivalent to the `Named character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + private stateNamedEntity; + /** + * Emit a named entity that was not terminated with a semicolon. + * + * @returns The number of characters consumed. + */ + private emitNotTerminatedNamedEntity; + /** + * Emit a named entity. + * + * @param result The index of the entity in the decode tree. + * @param valueLength The number of bytes in the entity. + * @param consumed The number of characters consumed. + * + * @returns The number of characters consumed. + */ + private emitNamedEntityData; + /** + * Signal to the parser that the end of the input was reached. + * + * Remaining data will be emitted and relevant errors will be produced. + * + * @returns The number of characters consumed. + */ + end(): number; +} +/** + * Determines the branch of the current node that is taken given the current + * character. This function is used to traverse the trie. + * + * @param decodeTree The trie. + * @param current The current node. + * @param nodeIdx The index right after the current node and its value. + * @param char The current character. + * @returns The index of the next node, or -1 if no branch is taken. + */ +export declare function determineBranch(decodeTree: Uint16Array, current: number, nodeIndex: number, char: number): number; +/** + * Decodes an HTML string. + * + * @param htmlString The string to decode. + * @param mode The decoding mode. + * @returns The decoded string. + */ +export declare function decodeHTML(htmlString: string, mode?: DecodingMode): string; +/** + * Decodes an HTML string in an attribute. + * + * @param htmlAttribute The string to decode. + * @returns The decoded string. + */ +export declare function decodeHTMLAttribute(htmlAttribute: string): string; +/** + * Decodes an HTML string, requiring all entities to be terminated by a semicolon. + * + * @param htmlString The string to decode. + * @returns The decoded string. + */ +export declare function decodeHTMLStrict(htmlString: string): string; +/** + * Decodes an XML string, requiring all entities to be terminated by a semicolon. + * + * @param xmlString The string to decode. + * @returns The decoded string. + */ +export declare function decodeXML(xmlString: string): string; +export { htmlDecodeTree } from "./generated/decode-data-html.js"; +export { xmlDecodeTree } from "./generated/decode-data-xml.js"; +export { decodeCodePoint, replaceCodePoint, fromCodePoint, } from "./decode-codepoint.js"; +//# sourceMappingURL=decode.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/decode.d.ts.map b/node_modules/webdav/node_modules/entities/dist/esm/decode.d.ts.map new file mode 100644 index 00000000..fc233f43 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/decode.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"decode.d.ts","sourceRoot":"","sources":["../../src/decode.ts"],"names":[],"mappings":"AAsBA,oBAAY,YAAY;IACpB,YAAY,QAAwB;IACpC,aAAa,QAAwB;IACrC,UAAU,MAAwB;CACrC;AAuCD,oBAAY,YAAY;IACpB,8DAA8D;IAC9D,MAAM,IAAI;IACV,uDAAuD;IACvD,MAAM,IAAI;IACV,oEAAoE;IACpE,SAAS,IAAI;CAChB;AAED;;GAEG;AACH,MAAM,WAAW,mBAAmB;IAChC,uCAAuC,IAAI,IAAI,CAAC;IAChD,0CAA0C,CACtC,kBAAkB,EAAE,MAAM,GAC3B,IAAI,CAAC;IACR,iCAAiC,CAAC,IAAI,EAAE,MAAM,GAAG,IAAI,CAAC;CACzD;AAED;;GAEG;AACH,qBAAa,aAAa;IAElB,wCAAwC;IACxC,OAAO,CAAC,QAAQ,CAAC,UAAU;IAC3B;;;;;;;;OAQG;IACH,OAAO,CAAC,QAAQ,CAAC,aAAa;IAC9B,gDAAgD;IAChD,OAAO,CAAC,QAAQ,CAAC,MAAM,CAAC;;IAbxB,wCAAwC;IACvB,UAAU,EAAE,WAAW;IACxC;;;;;;;;OAQG;IACc,aAAa,EAAE,CAAC,EAAE,EAAE,MAAM,EAAE,QAAQ,EAAE,MAAM,KAAK,IAAI;IACtE,gDAAgD;IAC/B,MAAM,CAAC,EAAE,mBAAmB,GAAG,SAAS;IAG7D,wCAAwC;IACxC,OAAO,CAAC,KAAK,CAAkC;IAC/C,6DAA6D;IAC7D,OAAO,CAAC,QAAQ,CAAK;IACrB;;;;;OAKG;IACH,OAAO,CAAC,MAAM,CAAK;IAEnB,4CAA4C;IAC5C,OAAO,CAAC,SAAS,CAAK;IACtB,6DAA6D;IAC7D,OAAO,CAAC,MAAM,CAAK;IACnB,kDAAkD;IAClD,OAAO,CAAC,UAAU,CAAuB;IAEzC,+CAA+C;IAC/C,WAAW,CAAC,UAAU,EAAE,YAAY,GAAG,IAAI;IAS3C;;;;;;;;;;OAUG;IACH,KAAK,CAAC,KAAK,EAAE,MAAM,EAAE,MAAM,EAAE,MAAM,GAAG,MAAM;IA8B5C;;;;;;;;OAQG;IACH,OAAO,CAAC,iBAAiB;IAezB,OAAO,CAAC,kBAAkB;IAe1B;;;;;;;;OAQG;IACH,OAAO,CAAC,eAAe;IAkBvB;;;;;;;;OAQG;IACH,OAAO,CAAC,mBAAmB;IAkB3B;;;;;;;;;;;;OAYG;IACH,OAAO,CAAC,iBAAiB;IA6BzB;;;;;;;;OAQG;IACH,OAAO,CAAC,gBAAgB;IAsDxB;;;;OAIG;IACH,OAAO,CAAC,4BAA4B;IAYpC;;;;;;;;OAQG;IACH,OAAO,CAAC,mBAAmB;IAqB3B;;;;;;OAMG;IACH,GAAG,IAAI,MAAM;CA6BhB;AAoDD;;;;;;;;;GASG;AACH,wBAAgB,eAAe,CAC3B,UAAU,EAAE,WAAW,EACvB,OAAO,EAAE,MAAM,EACf,SAAS,EAAE,MAAM,EACjB,IAAI,EAAE,MAAM,GACb,MAAM,CAsCR;AAKD;;;;;;GAMG;AACH,wBAAgB,UAAU,CACtB,UAAU,EAAE,MAAM,EAClB,IAAI,GAAE,YAAkC,GACzC,MAAM,CAER;AAED;;;;;GAKG;AACH,wBAAgB,mBAAmB,CAAC,aAAa,EAAE,MAAM,GAAG,MAAM,CAEjE;AAED;;;;;GAKG;AACH,wBAAgB,gBAAgB,CAAC,UAAU,EAAE,MAAM,GAAG,MAAM,CAE3D;AAED;;;;;GAKG;AACH,wBAAgB,SAAS,CAAC,SAAS,EAAE,MAAM,GAAG,MAAM,CAEnD;AAGD,OAAO,EAAE,cAAc,EAAE,MAAM,iCAAiC,CAAC;AACjE,OAAO,EAAE,aAAa,EAAE,MAAM,gCAAgC,CAAC;AAE/D,OAAO,EACH,eAAe,EACf,gBAAgB,EAChB,aAAa,GAChB,MAAM,uBAAuB,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/decode.js b/node_modules/webdav/node_modules/entities/dist/esm/decode.js new file mode 100644 index 00000000..8e0cb0a2 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/decode.js @@ -0,0 +1,497 @@ +import { htmlDecodeTree } from "./generated/decode-data-html.js"; +import { xmlDecodeTree } from "./generated/decode-data-xml.js"; +import { replaceCodePoint, fromCodePoint } from "./decode-codepoint.js"; +var CharCodes; +(function (CharCodes) { + CharCodes[CharCodes["NUM"] = 35] = "NUM"; + CharCodes[CharCodes["SEMI"] = 59] = "SEMI"; + CharCodes[CharCodes["EQUALS"] = 61] = "EQUALS"; + CharCodes[CharCodes["ZERO"] = 48] = "ZERO"; + CharCodes[CharCodes["NINE"] = 57] = "NINE"; + CharCodes[CharCodes["LOWER_A"] = 97] = "LOWER_A"; + CharCodes[CharCodes["LOWER_F"] = 102] = "LOWER_F"; + CharCodes[CharCodes["LOWER_X"] = 120] = "LOWER_X"; + CharCodes[CharCodes["LOWER_Z"] = 122] = "LOWER_Z"; + CharCodes[CharCodes["UPPER_A"] = 65] = "UPPER_A"; + CharCodes[CharCodes["UPPER_F"] = 70] = "UPPER_F"; + CharCodes[CharCodes["UPPER_Z"] = 90] = "UPPER_Z"; +})(CharCodes || (CharCodes = {})); +/** Bit that needs to be set to convert an upper case ASCII character to lower case */ +const TO_LOWER_BIT = 32; +export var BinTrieFlags; +(function (BinTrieFlags) { + BinTrieFlags[BinTrieFlags["VALUE_LENGTH"] = 49152] = "VALUE_LENGTH"; + BinTrieFlags[BinTrieFlags["BRANCH_LENGTH"] = 16256] = "BRANCH_LENGTH"; + BinTrieFlags[BinTrieFlags["JUMP_TABLE"] = 127] = "JUMP_TABLE"; +})(BinTrieFlags || (BinTrieFlags = {})); +function isNumber(code) { + return code >= CharCodes.ZERO && code <= CharCodes.NINE; +} +function isHexadecimalCharacter(code) { + return ((code >= CharCodes.UPPER_A && code <= CharCodes.UPPER_F) || + (code >= CharCodes.LOWER_A && code <= CharCodes.LOWER_F)); +} +function isAsciiAlphaNumeric(code) { + return ((code >= CharCodes.UPPER_A && code <= CharCodes.UPPER_Z) || + (code >= CharCodes.LOWER_A && code <= CharCodes.LOWER_Z) || + isNumber(code)); +} +/** + * Checks if the given character is a valid end character for an entity in an attribute. + * + * Attribute values that aren't terminated properly aren't parsed, and shouldn't lead to a parser error. + * See the example in https://html.spec.whatwg.org/multipage/parsing.html#named-character-reference-state + */ +function isEntityInAttributeInvalidEnd(code) { + return code === CharCodes.EQUALS || isAsciiAlphaNumeric(code); +} +var EntityDecoderState; +(function (EntityDecoderState) { + EntityDecoderState[EntityDecoderState["EntityStart"] = 0] = "EntityStart"; + EntityDecoderState[EntityDecoderState["NumericStart"] = 1] = "NumericStart"; + EntityDecoderState[EntityDecoderState["NumericDecimal"] = 2] = "NumericDecimal"; + EntityDecoderState[EntityDecoderState["NumericHex"] = 3] = "NumericHex"; + EntityDecoderState[EntityDecoderState["NamedEntity"] = 4] = "NamedEntity"; +})(EntityDecoderState || (EntityDecoderState = {})); +export var DecodingMode; +(function (DecodingMode) { + /** Entities in text nodes that can end with any character. */ + DecodingMode[DecodingMode["Legacy"] = 0] = "Legacy"; + /** Only allow entities terminated with a semicolon. */ + DecodingMode[DecodingMode["Strict"] = 1] = "Strict"; + /** Entities in attributes have limitations on ending characters. */ + DecodingMode[DecodingMode["Attribute"] = 2] = "Attribute"; +})(DecodingMode || (DecodingMode = {})); +/** + * Token decoder with support of writing partial entities. + */ +export class EntityDecoder { + constructor( + /** The tree used to decode entities. */ + decodeTree, + /** + * The function that is called when a codepoint is decoded. + * + * For multi-byte named entities, this will be called multiple times, + * with the second codepoint, and the same `consumed` value. + * + * @param codepoint The decoded codepoint. + * @param consumed The number of bytes consumed by the decoder. + */ + emitCodePoint, + /** An object that is used to produce errors. */ + errors) { + this.decodeTree = decodeTree; + this.emitCodePoint = emitCodePoint; + this.errors = errors; + /** The current state of the decoder. */ + this.state = EntityDecoderState.EntityStart; + /** Characters that were consumed while parsing an entity. */ + this.consumed = 1; + /** + * The result of the entity. + * + * Either the result index of a numeric entity, or the codepoint of a + * numeric entity. + */ + this.result = 0; + /** The current index in the decode tree. */ + this.treeIndex = 0; + /** The number of characters that were consumed in excess. */ + this.excess = 1; + /** The mode in which the decoder is operating. */ + this.decodeMode = DecodingMode.Strict; + } + /** Resets the instance to make it reusable. */ + startEntity(decodeMode) { + this.decodeMode = decodeMode; + this.state = EntityDecoderState.EntityStart; + this.result = 0; + this.treeIndex = 0; + this.excess = 1; + this.consumed = 1; + } + /** + * Write an entity to the decoder. This can be called multiple times with partial entities. + * If the entity is incomplete, the decoder will return -1. + * + * Mirrors the implementation of `getDecoder`, but with the ability to stop decoding if the + * entity is incomplete, and resume when the next string is written. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The offset at which the entity begins. Should be 0 if this is not the first call. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + write(input, offset) { + switch (this.state) { + case EntityDecoderState.EntityStart: { + if (input.charCodeAt(offset) === CharCodes.NUM) { + this.state = EntityDecoderState.NumericStart; + this.consumed += 1; + return this.stateNumericStart(input, offset + 1); + } + this.state = EntityDecoderState.NamedEntity; + return this.stateNamedEntity(input, offset); + } + case EntityDecoderState.NumericStart: { + return this.stateNumericStart(input, offset); + } + case EntityDecoderState.NumericDecimal: { + return this.stateNumericDecimal(input, offset); + } + case EntityDecoderState.NumericHex: { + return this.stateNumericHex(input, offset); + } + case EntityDecoderState.NamedEntity: { + return this.stateNamedEntity(input, offset); + } + } + } + /** + * Switches between the numeric decimal and hexadecimal states. + * + * Equivalent to the `Numeric character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + stateNumericStart(input, offset) { + if (offset >= input.length) { + return -1; + } + if ((input.charCodeAt(offset) | TO_LOWER_BIT) === CharCodes.LOWER_X) { + this.state = EntityDecoderState.NumericHex; + this.consumed += 1; + return this.stateNumericHex(input, offset + 1); + } + this.state = EntityDecoderState.NumericDecimal; + return this.stateNumericDecimal(input, offset); + } + addToNumericResult(input, start, end, base) { + if (start !== end) { + const digitCount = end - start; + this.result = + this.result * Math.pow(base, digitCount) + + Number.parseInt(input.substr(start, digitCount), base); + this.consumed += digitCount; + } + } + /** + * Parses a hexadecimal numeric entity. + * + * Equivalent to the `Hexademical character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + stateNumericHex(input, offset) { + const startIndex = offset; + while (offset < input.length) { + const char = input.charCodeAt(offset); + if (isNumber(char) || isHexadecimalCharacter(char)) { + offset += 1; + } + else { + this.addToNumericResult(input, startIndex, offset, 16); + return this.emitNumericEntity(char, 3); + } + } + this.addToNumericResult(input, startIndex, offset, 16); + return -1; + } + /** + * Parses a decimal numeric entity. + * + * Equivalent to the `Decimal character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + stateNumericDecimal(input, offset) { + const startIndex = offset; + while (offset < input.length) { + const char = input.charCodeAt(offset); + if (isNumber(char)) { + offset += 1; + } + else { + this.addToNumericResult(input, startIndex, offset, 10); + return this.emitNumericEntity(char, 2); + } + } + this.addToNumericResult(input, startIndex, offset, 10); + return -1; + } + /** + * Validate and emit a numeric entity. + * + * Implements the logic from the `Hexademical character reference start + * state` and `Numeric character reference end state` in the HTML spec. + * + * @param lastCp The last code point of the entity. Used to see if the + * entity was terminated with a semicolon. + * @param expectedLength The minimum number of characters that should be + * consumed. Used to validate that at least one digit + * was consumed. + * @returns The number of characters that were consumed. + */ + emitNumericEntity(lastCp, expectedLength) { + var _a; + // Ensure we consumed at least one digit. + if (this.consumed <= expectedLength) { + (_a = this.errors) === null || _a === void 0 ? void 0 : _a.absenceOfDigitsInNumericCharacterReference(this.consumed); + return 0; + } + // Figure out if this is a legit end of the entity + if (lastCp === CharCodes.SEMI) { + this.consumed += 1; + } + else if (this.decodeMode === DecodingMode.Strict) { + return 0; + } + this.emitCodePoint(replaceCodePoint(this.result), this.consumed); + if (this.errors) { + if (lastCp !== CharCodes.SEMI) { + this.errors.missingSemicolonAfterCharacterReference(); + } + this.errors.validateNumericCharacterReference(this.result); + } + return this.consumed; + } + /** + * Parses a named entity. + * + * Equivalent to the `Named character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + stateNamedEntity(input, offset) { + const { decodeTree } = this; + let current = decodeTree[this.treeIndex]; + // The mask is the number of bytes of the value, including the current byte. + let valueLength = (current & BinTrieFlags.VALUE_LENGTH) >> 14; + for (; offset < input.length; offset++, this.excess++) { + const char = input.charCodeAt(offset); + this.treeIndex = determineBranch(decodeTree, current, this.treeIndex + Math.max(1, valueLength), char); + if (this.treeIndex < 0) { + return this.result === 0 || + // If we are parsing an attribute + (this.decodeMode === DecodingMode.Attribute && + // We shouldn't have consumed any characters after the entity, + (valueLength === 0 || + // And there should be no invalid characters. + isEntityInAttributeInvalidEnd(char))) + ? 0 + : this.emitNotTerminatedNamedEntity(); + } + current = decodeTree[this.treeIndex]; + valueLength = (current & BinTrieFlags.VALUE_LENGTH) >> 14; + // If the branch is a value, store it and continue + if (valueLength !== 0) { + // If the entity is terminated by a semicolon, we are done. + if (char === CharCodes.SEMI) { + return this.emitNamedEntityData(this.treeIndex, valueLength, this.consumed + this.excess); + } + // If we encounter a non-terminated (legacy) entity while parsing strictly, then ignore it. + if (this.decodeMode !== DecodingMode.Strict) { + this.result = this.treeIndex; + this.consumed += this.excess; + this.excess = 0; + } + } + } + return -1; + } + /** + * Emit a named entity that was not terminated with a semicolon. + * + * @returns The number of characters consumed. + */ + emitNotTerminatedNamedEntity() { + var _a; + const { result, decodeTree } = this; + const valueLength = (decodeTree[result] & BinTrieFlags.VALUE_LENGTH) >> 14; + this.emitNamedEntityData(result, valueLength, this.consumed); + (_a = this.errors) === null || _a === void 0 ? void 0 : _a.missingSemicolonAfterCharacterReference(); + return this.consumed; + } + /** + * Emit a named entity. + * + * @param result The index of the entity in the decode tree. + * @param valueLength The number of bytes in the entity. + * @param consumed The number of characters consumed. + * + * @returns The number of characters consumed. + */ + emitNamedEntityData(result, valueLength, consumed) { + const { decodeTree } = this; + this.emitCodePoint(valueLength === 1 + ? decodeTree[result] & ~BinTrieFlags.VALUE_LENGTH + : decodeTree[result + 1], consumed); + if (valueLength === 3) { + // For multi-byte values, we need to emit the second byte. + this.emitCodePoint(decodeTree[result + 2], consumed); + } + return consumed; + } + /** + * Signal to the parser that the end of the input was reached. + * + * Remaining data will be emitted and relevant errors will be produced. + * + * @returns The number of characters consumed. + */ + end() { + var _a; + switch (this.state) { + case EntityDecoderState.NamedEntity: { + // Emit a named entity if we have one. + return this.result !== 0 && + (this.decodeMode !== DecodingMode.Attribute || + this.result === this.treeIndex) + ? this.emitNotTerminatedNamedEntity() + : 0; + } + // Otherwise, emit a numeric entity if we have one. + case EntityDecoderState.NumericDecimal: { + return this.emitNumericEntity(0, 2); + } + case EntityDecoderState.NumericHex: { + return this.emitNumericEntity(0, 3); + } + case EntityDecoderState.NumericStart: { + (_a = this.errors) === null || _a === void 0 ? void 0 : _a.absenceOfDigitsInNumericCharacterReference(this.consumed); + return 0; + } + case EntityDecoderState.EntityStart: { + // Return 0 if we have no entity. + return 0; + } + } + } +} +/** + * Creates a function that decodes entities in a string. + * + * @param decodeTree The decode tree. + * @returns A function that decodes entities in a string. + */ +function getDecoder(decodeTree) { + let returnValue = ""; + const decoder = new EntityDecoder(decodeTree, (data) => (returnValue += fromCodePoint(data))); + return function decodeWithTrie(input, decodeMode) { + let lastIndex = 0; + let offset = 0; + while ((offset = input.indexOf("&", offset)) >= 0) { + returnValue += input.slice(lastIndex, offset); + decoder.startEntity(decodeMode); + const length = decoder.write(input, + // Skip the "&" + offset + 1); + if (length < 0) { + lastIndex = offset + decoder.end(); + break; + } + lastIndex = offset + length; + // If `length` is 0, skip the current `&` and continue. + offset = length === 0 ? lastIndex + 1 : lastIndex; + } + const result = returnValue + input.slice(lastIndex); + // Make sure we don't keep a reference to the final string. + returnValue = ""; + return result; + }; +} +/** + * Determines the branch of the current node that is taken given the current + * character. This function is used to traverse the trie. + * + * @param decodeTree The trie. + * @param current The current node. + * @param nodeIdx The index right after the current node and its value. + * @param char The current character. + * @returns The index of the next node, or -1 if no branch is taken. + */ +export function determineBranch(decodeTree, current, nodeIndex, char) { + const branchCount = (current & BinTrieFlags.BRANCH_LENGTH) >> 7; + const jumpOffset = current & BinTrieFlags.JUMP_TABLE; + // Case 1: Single branch encoded in jump offset + if (branchCount === 0) { + return jumpOffset !== 0 && char === jumpOffset ? nodeIndex : -1; + } + // Case 2: Multiple branches encoded in jump table + if (jumpOffset) { + const value = char - jumpOffset; + return value < 0 || value >= branchCount + ? -1 + : decodeTree[nodeIndex + value] - 1; + } + // Case 3: Multiple branches encoded in dictionary + // Binary search for the character. + let lo = nodeIndex; + let hi = lo + branchCount - 1; + while (lo <= hi) { + const mid = (lo + hi) >>> 1; + const midValue = decodeTree[mid]; + if (midValue < char) { + lo = mid + 1; + } + else if (midValue > char) { + hi = mid - 1; + } + else { + return decodeTree[mid + branchCount]; + } + } + return -1; +} +const htmlDecoder = /* #__PURE__ */ getDecoder(htmlDecodeTree); +const xmlDecoder = /* #__PURE__ */ getDecoder(xmlDecodeTree); +/** + * Decodes an HTML string. + * + * @param htmlString The string to decode. + * @param mode The decoding mode. + * @returns The decoded string. + */ +export function decodeHTML(htmlString, mode = DecodingMode.Legacy) { + return htmlDecoder(htmlString, mode); +} +/** + * Decodes an HTML string in an attribute. + * + * @param htmlAttribute The string to decode. + * @returns The decoded string. + */ +export function decodeHTMLAttribute(htmlAttribute) { + return htmlDecoder(htmlAttribute, DecodingMode.Attribute); +} +/** + * Decodes an HTML string, requiring all entities to be terminated by a semicolon. + * + * @param htmlString The string to decode. + * @returns The decoded string. + */ +export function decodeHTMLStrict(htmlString) { + return htmlDecoder(htmlString, DecodingMode.Strict); +} +/** + * Decodes an XML string, requiring all entities to be terminated by a semicolon. + * + * @param xmlString The string to decode. + * @returns The decoded string. + */ +export function decodeXML(xmlString) { + return xmlDecoder(xmlString, DecodingMode.Strict); +} +// Re-export for use by eg. htmlparser2 +export { htmlDecodeTree } from "./generated/decode-data-html.js"; +export { xmlDecodeTree } from "./generated/decode-data-xml.js"; +export { decodeCodePoint, replaceCodePoint, fromCodePoint, } from "./decode-codepoint.js"; +//# sourceMappingURL=decode.js.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/decode.js.map b/node_modules/webdav/node_modules/entities/dist/esm/decode.js.map new file mode 100644 index 00000000..be71236d --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/decode.js.map @@ -0,0 +1 @@ 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\ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/encode.d.ts b/node_modules/webdav/node_modules/entities/dist/esm/encode.d.ts new file mode 100644 index 00000000..e110bea7 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/encode.d.ts @@ -0,0 +1,22 @@ +/** + * Encodes all characters in the input using HTML entities. This includes + * characters that are valid ASCII characters in HTML documents, such as `#`. + * + * To get a more compact output, consider using the `encodeNonAsciiHTML` + * function, which will only encode characters that are not valid in HTML + * documents, as well as non-ASCII characters. + * + * If a character has no equivalent entity, a numeric hexadecimal reference + * (eg. `ü`) will be used. + */ +export declare function encodeHTML(input: string): string; +/** + * Encodes all non-ASCII characters, as well as characters not valid in HTML + * documents using HTML entities. This function will not encode characters that + * are valid in HTML documents, such as `#`. + * + * If a character has no equivalent entity, a numeric hexadecimal reference + * (eg. `ü`) will be used. + */ +export declare function encodeNonAsciiHTML(input: string): string; +//# sourceMappingURL=encode.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/encode.d.ts.map b/node_modules/webdav/node_modules/entities/dist/esm/encode.d.ts.map new file mode 100644 index 00000000..3ef0d10f --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/encode.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"encode.d.ts","sourceRoot":"","sources":["../../src/encode.ts"],"names":[],"mappings":"AAKA;;;;;;;;;;GAUG;AACH,wBAAgB,UAAU,CAAC,KAAK,EAAE,MAAM,GAAG,MAAM,CAEhD;AACD;;;;;;;GAOG;AACH,wBAAgB,kBAAkB,CAAC,KAAK,EAAE,MAAM,GAAG,MAAM,CAExD"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/encode.js b/node_modules/webdav/node_modules/entities/dist/esm/encode.js new file mode 100644 index 00000000..055c9107 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/encode.js @@ -0,0 +1,69 @@ +import { htmlTrie } from "./generated/encode-html.js"; +import { xmlReplacer, getCodePoint } from "./escape.js"; +const htmlReplacer = /[\t\n\f!-,./:-@[-`{-}\u0080-\uFFFF]/g; +/** + * Encodes all characters in the input using HTML entities. This includes + * characters that are valid ASCII characters in HTML documents, such as `#`. + * + * To get a more compact output, consider using the `encodeNonAsciiHTML` + * function, which will only encode characters that are not valid in HTML + * documents, as well as non-ASCII characters. + * + * If a character has no equivalent entity, a numeric hexadecimal reference + * (eg. `ü`) will be used. + */ +export function encodeHTML(input) { + return encodeHTMLTrieRe(htmlReplacer, input); +} +/** + * Encodes all non-ASCII characters, as well as characters not valid in HTML + * documents using HTML entities. This function will not encode characters that + * are valid in HTML documents, such as `#`. + * + * If a character has no equivalent entity, a numeric hexadecimal reference + * (eg. `ü`) will be used. + */ +export function encodeNonAsciiHTML(input) { + return encodeHTMLTrieRe(xmlReplacer, input); +} +function encodeHTMLTrieRe(regExp, input) { + let returnValue = ""; + let lastIndex = 0; + let match; + while ((match = regExp.exec(input)) !== null) { + const { index } = match; + returnValue += input.substring(lastIndex, index); + const char = input.charCodeAt(index); + let next = htmlTrie.get(char); + if (typeof next === "object") { + // We are in a branch. Try to match the next char. + if (index + 1 < input.length) { + const nextChar = input.charCodeAt(index + 1); + const value = typeof next.n === "number" + ? next.n === nextChar + ? next.o + : undefined + : next.n.get(nextChar); + if (value !== undefined) { + returnValue += value; + lastIndex = regExp.lastIndex += 1; + continue; + } + } + next = next.v; + } + // We might have a tree node without a value; skip and use a numeric entity. + if (next === undefined) { + const cp = getCodePoint(input, index); + returnValue += `&#x${cp.toString(16)};`; + // Increase by 1 if we have a surrogate pair + lastIndex = regExp.lastIndex += Number(cp !== char); + } + else { + returnValue += next; + lastIndex = index + 1; + } + } + return returnValue + input.substr(lastIndex); +} +//# sourceMappingURL=encode.js.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/encode.js.map b/node_modules/webdav/node_modules/entities/dist/esm/encode.js.map new file mode 100644 index 00000000..942f6145 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/encode.js.map @@ -0,0 +1 @@ +{"version":3,"file":"encode.js","sourceRoot":"","sources":["../../src/encode.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,QAAQ,EAAE,MAAM,4BAA4B,CAAC;AACtD,OAAO,EAAE,WAAW,EAAE,YAAY,EAAE,MAAM,aAAa,CAAC;AAExD,MAAM,YAAY,GAAG,sCAAsC,CAAC;AAE5D;;;;;;;;;;GAUG;AACH,MAAM,UAAU,UAAU,CAAC,KAAa;IACpC,OAAO,gBAAgB,CAAC,YAAY,EAAE,KAAK,CAAC,CAAC;AACjD,CAAC;AACD;;;;;;;GAOG;AACH,MAAM,UAAU,kBAAkB,CAAC,KAAa;IAC5C,OAAO,gBAAgB,CAAC,WAAW,EAAE,KAAK,CAAC,CAAC;AAChD,CAAC;AAED,SAAS,gBAAgB,CAAC,MAAc,EAAE,KAAa;IACnD,IAAI,WAAW,GAAG,EAAE,CAAC;IACrB,IAAI,SAAS,GAAG,CAAC,CAAC;IAClB,IAAI,KAAK,CAAC;IAEV,OAAO,CAAC,KAAK,GAAG,MAAM,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC,KAAK,IAAI,EAAE,CAAC;QAC3C,MAAM,EAAE,KAAK,EAAE,GAAG,KAAK,CAAC;QACxB,WAAW,IAAI,KAAK,CAAC,SAAS,CAAC,SAAS,EAAE,KAAK,CAAC,CAAC;QACjD,MAAM,IAAI,GAAG,KAAK,CAAC,UAAU,CAAC,KAAK,CAAC,CAAC;QACrC,IAAI,IAAI,GAAG,QAAQ,CAAC,GAAG,CAAC,IAAI,CAAC,CAAC;QAE9B,IAAI,OAAO,IAAI,KAAK,QAAQ,EAAE,CAAC;YAC3B,kDAAkD;YAClD,IAAI,KAAK,GAAG,CAAC,GAAG,KAAK,CAAC,MAAM,EAAE,CAAC;gBAC3B,MAAM,QAAQ,GAAG,KAAK,CAAC,UAAU,CAAC,KAAK,GAAG,CAAC,CAAC,CAAC;gBAC7C,MAAM,KAAK,GACP,OAAO,IAAI,CAAC,CAAC,KAAK,QAAQ;oBACtB,CAAC,CAAC,IAAI,CAAC,CAAC,KAAK,QAAQ;wBACjB,CAAC,CAAC,IAAI,CAAC,CAAC;wBACR,CAAC,CAAC,SAAS;oBACf,CAAC,CAAC,IAAI,CAAC,CAAC,CAAC,GAAG,CAAC,QAAQ,CAAC,CAAC;gBAE/B,IAAI,KAAK,KAAK,SAAS,EAAE,CAAC;oBACtB,WAAW,IAAI,KAAK,CAAC;oBACrB,SAAS,GAAG,MAAM,CAAC,SAAS,IAAI,CAAC,CAAC;oBAClC,SAAS;gBACb,CAAC;YACL,CAAC;YAED,IAAI,GAAG,IAAI,CAAC,CAAC,CAAC;QAClB,CAAC;QAED,4EAA4E;QAC5E,IAAI,IAAI,KAAK,SAAS,EAAE,CAAC;YACrB,MAAM,EAAE,GAAG,YAAY,CAAC,KAAK,EAAE,KAAK,CAAC,CAAC;YACtC,WAAW,IAAI,MAAM,EAAE,CAAC,QAAQ,CAAC,EAAE,CAAC,GAAG,CAAC;YACxC,4CAA4C;YAC5C,SAAS,GAAG,MAAM,CAAC,SAAS,IAAI,MAAM,CAAC,EAAE,KAAK,IAAI,CAAC,CAAC;QACxD,CAAC;aAAM,CAAC;YACJ,WAAW,IAAI,IAAI,CAAC;YACpB,SAAS,GAAG,KAAK,GAAG,CAAC,CAAC;QAC1B,CAAC;IACL,CAAC;IAED,OAAO,WAAW,GAAG,KAAK,CAAC,MAAM,CAAC,SAAS,CAAC,CAAC;AACjD,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/escape.d.ts b/node_modules/webdav/node_modules/entities/dist/esm/escape.d.ts new file mode 100644 index 00000000..19bfc876 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/escape.d.ts @@ -0,0 +1,43 @@ +export declare const xmlReplacer: RegExp; +export declare const getCodePoint: (c: string, index: number) => number; +/** + * Encodes all non-ASCII characters, as well as characters not valid in XML + * documents using XML entities. + * + * If a character has no equivalent entity, a + * numeric hexadecimal reference (eg. `ü`) will be used. + */ +export declare function encodeXML(input: string): string; +/** + * Encodes all non-ASCII characters, as well as characters not valid in XML + * documents using numeric hexadecimal reference (eg. `ü`). + * + * Have a look at `escapeUTF8` if you want a more concise output at the expense + * of reduced transportability. + * + * @param data String to escape. + */ +export declare const escape: typeof encodeXML; +/** + * Encodes all characters not valid in XML documents using XML entities. + * + * Note that the output will be character-set dependent. + * + * @param data String to escape. + */ +export declare const escapeUTF8: (data: string) => string; +/** + * Encodes all characters that have to be escaped in HTML attributes, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + * + * @param data String to escape. + */ +export declare const escapeAttribute: (data: string) => string; +/** + * Encodes all characters that have to be escaped in HTML text, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + * + * @param data String to escape. + */ +export declare const escapeText: (data: string) => string; +//# sourceMappingURL=escape.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/escape.d.ts.map b/node_modules/webdav/node_modules/entities/dist/esm/escape.d.ts.map new file mode 100644 index 00000000..02a129ca --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/escape.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"escape.d.ts","sourceRoot":"","sources":["../../src/escape.ts"],"names":[],"mappings":"AAAA,eAAO,MAAM,WAAW,EAAE,MAAiC,CAAC;AAW5D,eAAO,MAAM,YAAY,EAAE,CAAC,CAAC,EAAE,MAAM,EAAE,KAAK,EAAE,MAAM,KAAK,MAWoB,CAAC;AAE9E;;;;;;GAMG;AACH,wBAAgB,SAAS,CAAC,KAAK,EAAE,MAAM,GAAG,MAAM,CA0B/C;AAED;;;;;;;;GAQG;AACH,eAAO,MAAM,MAAM,EAAE,OAAO,SAAqB,CAAC;AAqClD;;;;;;GAMG;AACH,eAAO,MAAM,UAAU,EAAE,CAAC,IAAI,EAAE,MAAM,KAAK,MAG1C,CAAC;AAEF;;;;;GAKG;AACH,eAAO,MAAM,eAAe,EAAE,CAAC,IAAI,EAAE,MAAM,KAAK,MAQ3C,CAAC;AAEN;;;;;GAKG;AACH,eAAO,MAAM,UAAU,EAAE,CAAC,IAAI,EAAE,MAAM,KAAK,MAQ1C,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/escape.js b/node_modules/webdav/node_modules/entities/dist/esm/escape.js new file mode 100644 index 00000000..98aaa314 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/escape.js @@ -0,0 +1,117 @@ +export const xmlReplacer = /["$&'<>\u0080-\uFFFF]/g; +const xmlCodeMap = new Map([ + [34, """], + [38, "&"], + [39, "'"], + [60, "<"], + [62, ">"], +]); +// For compatibility with node < 4, we wrap `codePointAt` +export const getCodePoint = +// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition +String.prototype.codePointAt == null + ? (c, index) => (c.charCodeAt(index) & 64512) === 55296 + ? (c.charCodeAt(index) - 55296) * 1024 + + c.charCodeAt(index + 1) - + 56320 + + 65536 + : c.charCodeAt(index) + : // http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae + (input, index) => input.codePointAt(index); +/** + * Encodes all non-ASCII characters, as well as characters not valid in XML + * documents using XML entities. + * + * If a character has no equivalent entity, a + * numeric hexadecimal reference (eg. `ü`) will be used. + */ +export function encodeXML(input) { + let returnValue = ""; + let lastIndex = 0; + let match; + while ((match = xmlReplacer.exec(input)) !== null) { + const { index } = match; + const char = input.charCodeAt(index); + const next = xmlCodeMap.get(char); + if (next === undefined) { + returnValue += `${input.substring(lastIndex, index)}&#x${getCodePoint(input, index).toString(16)};`; + // Increase by 1 if we have a surrogate pair + lastIndex = xmlReplacer.lastIndex += Number((char & 64512) === 55296); + } + else { + returnValue += input.substring(lastIndex, index) + next; + lastIndex = index + 1; + } + } + return returnValue + input.substr(lastIndex); +} +/** + * Encodes all non-ASCII characters, as well as characters not valid in XML + * documents using numeric hexadecimal reference (eg. `ü`). + * + * Have a look at `escapeUTF8` if you want a more concise output at the expense + * of reduced transportability. + * + * @param data String to escape. + */ +export const escape = encodeXML; +/** + * Creates a function that escapes all characters matched by the given regular + * expression using the given map of characters to escape to their entities. + * + * @param regex Regular expression to match characters to escape. + * @param map Map of characters to escape to their entities. + * + * @returns Function that escapes all characters matched by the given regular + * expression using the given map of characters to escape to their entities. + */ +function getEscaper(regex, map) { + return function escape(data) { + let match; + let lastIndex = 0; + let result = ""; + while ((match = regex.exec(data))) { + if (lastIndex !== match.index) { + result += data.substring(lastIndex, match.index); + } + // We know that this character will be in the map. + result += map.get(match[0].charCodeAt(0)); + // Every match will be of length 1 + lastIndex = match.index + 1; + } + return result + data.substring(lastIndex); + }; +} +/** + * Encodes all characters not valid in XML documents using XML entities. + * + * Note that the output will be character-set dependent. + * + * @param data String to escape. + */ +export const escapeUTF8 = /* #__PURE__ */ getEscaper(/["&'<>]/g, xmlCodeMap); +/** + * Encodes all characters that have to be escaped in HTML attributes, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + * + * @param data String to escape. + */ +export const escapeAttribute = +/* #__PURE__ */ getEscaper(/["&\u00A0]/g, new Map([ + [34, """], + [38, "&"], + [160, " "], +])); +/** + * Encodes all characters that have to be escaped in HTML text, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + * + * @param data String to escape. + */ +export const escapeText = /* #__PURE__ */ getEscaper(/[&<>\u00A0]/g, new Map([ + [38, "&"], + [60, "<"], + [62, ">"], + [160, " "], +])); +//# sourceMappingURL=escape.js.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/escape.js.map b/node_modules/webdav/node_modules/entities/dist/esm/escape.js.map new file mode 100644 index 00000000..4349bea4 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/escape.js.map @@ -0,0 +1 @@ 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\ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-html.d.ts b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-html.d.ts new file mode 100644 index 00000000..cd095355 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-html.d.ts @@ -0,0 +1,2 @@ +export declare const htmlDecodeTree: Uint16Array; +//# sourceMappingURL=decode-data-html.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-html.d.ts.map b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-html.d.ts.map new file mode 100644 index 00000000..6bb1ecfb --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-html.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"decode-data-html.d.ts","sourceRoot":"","sources":["../../../src/generated/decode-data-html.ts"],"names":[],"mappings":"AAEA,eAAO,MAAM,cAAc,EAAE,WAK5B,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-html.js b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-html.js new file mode 100644 index 00000000..878d5de2 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-html.js @@ -0,0 +1,7 @@ +// Generated using scripts/write-decode-map.ts +export const htmlDecodeTree = /* #__PURE__ */ new Uint16Array( +// prettier-ignore +/* #__PURE__ */ 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+ .split("") + .map((c) => c.charCodeAt(0))); +//# sourceMappingURL=decode-data-html.js.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-html.js.map b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-html.js.map new file mode 100644 index 00000000..842ffcbe --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-html.js.map @@ -0,0 +1 @@ +{"version":3,"file":"decode-data-html.js","sourceRoot":"","sources":["../../../src/generated/decode-data-html.ts"],"names":[],"mappings":"AAAA,8CAA8C;AAE9C,MAAM,CAAC,MAAM,cAAc,GAAgB,eAAe,CAAC,IAAI,WAAW;AACtE,kBAAkB;AAClB,eAAe,CAAC,268CAA268C;KACt78C,KAAK,CAAC,EAAE,CAAC;KACT,GAAG,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,CAAC,CAAC,UAAU,CAAC,CAAC,CAAC,CAAC,CACnC,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-xml.d.ts b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-xml.d.ts new file mode 100644 index 00000000..6467acc1 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-xml.d.ts @@ -0,0 +1,2 @@ +export declare const xmlDecodeTree: Uint16Array; +//# sourceMappingURL=decode-data-xml.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-xml.d.ts.map b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-xml.d.ts.map new file mode 100644 index 00000000..29885091 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-xml.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"decode-data-xml.d.ts","sourceRoot":"","sources":["../../../src/generated/decode-data-xml.ts"],"names":[],"mappings":"AAEA,eAAO,MAAM,aAAa,EAAE,WAK3B,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-xml.js b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-xml.js new file mode 100644 index 00000000..e5d2d70c --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-xml.js @@ -0,0 +1,7 @@ +// Generated using scripts/write-decode-map.ts +export const xmlDecodeTree = /* #__PURE__ */ new Uint16Array( +// prettier-ignore +/* #__PURE__ */ "\u0200aglq\t\x15\x18\x1b\u026d\x0f\0\0\x12p;\u4026os;\u4027t;\u403et;\u403cuot;\u4022" + .split("") + .map((c) => c.charCodeAt(0))); +//# sourceMappingURL=decode-data-xml.js.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-xml.js.map b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-xml.js.map new file mode 100644 index 00000000..fe3e571f --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/generated/decode-data-xml.js.map @@ -0,0 +1 @@ +{"version":3,"file":"decode-data-xml.js","sourceRoot":"","sources":["../../../src/generated/decode-data-xml.ts"],"names":[],"mappings":"AAAA,8CAA8C;AAE9C,MAAM,CAAC,MAAM,aAAa,GAAgB,eAAe,CAAC,IAAI,WAAW;AACrE,kBAAkB;AAClB,eAAe,CAAC,uFAAuF;KAClG,KAAK,CAAC,EAAE,CAAC;KACT,GAAG,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,CAAC,CAAC,UAAU,CAAC,CAAC,CAAC,CAAC,CACnC,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/generated/encode-html.d.ts b/node_modules/webdav/node_modules/entities/dist/esm/generated/encode-html.d.ts new file mode 100644 index 00000000..a648e2b1 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/generated/encode-html.d.ts @@ -0,0 +1,8 @@ +type EncodeTrieNode = string | { + v?: string; + n: number | Map; + o?: string; +}; +export declare const htmlTrie: Map; +export {}; +//# sourceMappingURL=encode-html.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/generated/encode-html.d.ts.map b/node_modules/webdav/node_modules/entities/dist/esm/generated/encode-html.d.ts.map new file mode 100644 index 00000000..e19fef96 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/generated/encode-html.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"encode-html.d.ts","sourceRoot":"","sources":["../../../src/generated/encode-html.ts"],"names":[],"mappings":"AAEA,KAAK,cAAc,GACb,MAAM,GACN;IAAE,CAAC,CAAC,EAAE,MAAM,CAAC;IAAC,CAAC,EAAE,MAAM,GAAG,GAAG,CAAC,MAAM,EAAE,cAAc,CAAC,CAAC;IAAC,CAAC,CAAC,EAAE,MAAM,CAAA;CAAE,CAAC;AAY1E,eAAO,MAAM,QAAQ,EAAE,GAAG,CAAC,MAAM,EAAC,cAAc,CAAwhuB,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/generated/encode-html.js b/node_modules/webdav/node_modules/entities/dist/esm/generated/encode-html.js new file mode 100644 index 00000000..f79ce1db --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/generated/encode-html.js @@ -0,0 +1,10 @@ +// Generated using scripts/write-encode-map.ts +function restoreDiff(array) { + for (let index = 1; index < array.length; index++) { + array[index][0] += array[index - 1][0] + 1; + } + return array; +} +// prettier-ignore +export const htmlTrie = /* #__PURE__ */ new Map(/* #__PURE__ */ restoreDiff([[9, " "], [0, " "], [22, "!"], [0, """], [0, "#"], [0, "$"], [0, "%"], [0, "&"], [0, "'"], [0, "("], [0, ")"], [0, "*"], [0, "+"], [0, ","], [1, "."], [0, "/"], [10, ":"], [0, ";"], [0, { v: "<", n: 8402, o: "<⃒" }], [0, { v: "=", n: 8421, o: "=⃥" }], [0, { v: ">", n: 8402, o: ">⃒" }], [0, "?"], [0, "@"], [26, "["], [0, "\"], [0, "]"], [0, "^"], [0, "_"], [0, "`"], [5, { n: 106, o: "fj" }], [20, "{"], [0, "|"], [0, "}"], [34, " "], [0, "¡"], [0, "¢"], [0, "£"], [0, "¤"], [0, "¥"], [0, "¦"], [0, "§"], [0, "¨"], [0, "©"], [0, "ª"], [0, "«"], [0, "¬"], [0, "­"], [0, "®"], [0, "¯"], [0, "°"], [0, 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\ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/index.d.ts b/node_modules/webdav/node_modules/entities/dist/esm/index.d.ts new file mode 100644 index 00000000..bdb9ab76 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/index.d.ts @@ -0,0 +1,96 @@ +import { DecodingMode } from "./decode.js"; +/** The level of entities to support. */ +export declare enum EntityLevel { + /** Support only XML entities. */ + XML = 0, + /** Support HTML entities, which are a superset of XML entities. */ + HTML = 1 +} +export declare enum EncodingMode { + /** + * The output is UTF-8 encoded. Only characters that need escaping within + * XML will be escaped. + */ + UTF8 = 0, + /** + * The output consists only of ASCII characters. Characters that need + * escaping within HTML, and characters that aren't ASCII characters will + * be escaped. + */ + ASCII = 1, + /** + * Encode all characters that have an equivalent entity, as well as all + * characters that are not ASCII characters. + */ + Extensive = 2, + /** + * Encode all characters that have to be escaped in HTML attributes, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + */ + Attribute = 3, + /** + * Encode all characters that have to be escaped in HTML text, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + */ + Text = 4 +} +export interface DecodingOptions { + /** + * The level of entities to support. + * @default {@link EntityLevel.XML} + */ + level?: EntityLevel; + /** + * Decoding mode. If `Legacy`, will support legacy entities not terminated + * with a semicolon (`;`). + * + * Always `Strict` for XML. For HTML, set this to `true` if you are parsing + * an attribute value. + * + * The deprecated `decodeStrict` function defaults this to `Strict`. + * + * @default {@link DecodingMode.Legacy} + */ + mode?: DecodingMode | undefined; +} +/** + * Decodes a string with entities. + * + * @param input String to decode. + * @param options Decoding options. + */ +export declare function decode(input: string, options?: DecodingOptions | EntityLevel): string; +/** + * Decodes a string with entities. Does not allow missing trailing semicolons for entities. + * + * @param input String to decode. + * @param options Decoding options. + * @deprecated Use `decode` with the `mode` set to `Strict`. + */ +export declare function decodeStrict(input: string, options?: DecodingOptions | EntityLevel): string; +/** + * Options for `encode`. + */ +export interface EncodingOptions { + /** + * The level of entities to support. + * @default {@link EntityLevel.XML} + */ + level?: EntityLevel; + /** + * Output format. + * @default {@link EncodingMode.Extensive} + */ + mode?: EncodingMode; +} +/** + * Encodes a string with entities. + * + * @param input String to encode. + * @param options Encoding options. + */ +export declare function encode(input: string, options?: EncodingOptions | EntityLevel): string; +export { encodeXML, escape, escapeUTF8, escapeAttribute, escapeText, } from "./escape.js"; +export { encodeHTML, encodeNonAsciiHTML, encodeHTML as encodeHTML4, encodeHTML as encodeHTML5, } from "./encode.js"; +export { EntityDecoder, DecodingMode, decodeXML, decodeHTML, decodeHTMLStrict, decodeHTMLAttribute, decodeHTML as decodeHTML4, decodeHTML as decodeHTML5, decodeHTMLStrict as decodeHTML4Strict, decodeHTMLStrict as decodeHTML5Strict, decodeXML as decodeXMLStrict, } from "./decode.js"; +//# sourceMappingURL=index.d.ts.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/index.d.ts.map b/node_modules/webdav/node_modules/entities/dist/esm/index.d.ts.map new file mode 100644 index 00000000..7b9b63f5 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/index.d.ts.map @@ -0,0 +1 @@ +{"version":3,"file":"index.d.ts","sourceRoot":"","sources":["../../src/index.ts"],"names":[],"mappings":"AAAA,OAAO,EAAyB,YAAY,EAAE,MAAM,aAAa,CAAC;AASlE,wCAAwC;AACxC,oBAAY,WAAW;IACnB,iCAAiC;IACjC,GAAG,IAAI;IACP,mEAAmE;IACnE,IAAI,IAAI;CACX;AAED,oBAAY,YAAY;IACpB;;;OAGG;IACH,IAAI,IAAA;IACJ;;;;OAIG;IACH,KAAK,IAAA;IACL;;;OAGG;IACH,SAAS,IAAA;IACT;;;OAGG;IACH,SAAS,IAAA;IACT;;;OAGG;IACH,IAAI,IAAA;CACP;AAED,MAAM,WAAW,eAAe;IAC5B;;;OAGG;IACH,KAAK,CAAC,EAAE,WAAW,CAAC;IACpB;;;;;;;;;;OAUG;IACH,IAAI,CAAC,EAAE,YAAY,GAAG,SAAS,CAAC;CACnC;AAED;;;;;GAKG;AACH,wBAAgB,MAAM,CAClB,KAAK,EAAE,MAAM,EACb,OAAO,GAAE,eAAe,GAAG,WAA6B,GACzD,MAAM,CASR;AAED;;;;;;GAMG;AACH,wBAAgB,YAAY,CACxB,KAAK,EAAE,MAAM,EACb,OAAO,GAAE,eAAe,GAAG,WAA6B,GACzD,MAAM,CAMR;AAED;;GAEG;AACH,MAAM,WAAW,eAAe;IAC5B;;;OAGG;IACH,KAAK,CAAC,EAAE,WAAW,CAAC;IACpB;;;OAGG;IACH,IAAI,CAAC,EAAE,YAAY,CAAC;CACvB;AAED;;;;;GAKG;AACH,wBAAgB,MAAM,CAClB,KAAK,EAAE,MAAM,EACb,OAAO,GAAE,eAAe,GAAG,WAA6B,GACzD,MAAM,CA2BR;AAED,OAAO,EACH,SAAS,EACT,MAAM,EACN,UAAU,EACV,eAAe,EACf,UAAU,GACb,MAAM,aAAa,CAAC;AAErB,OAAO,EACH,UAAU,EACV,kBAAkB,EAElB,UAAU,IAAI,WAAW,EACzB,UAAU,IAAI,WAAW,GAC5B,MAAM,aAAa,CAAC;AAErB,OAAO,EACH,aAAa,EACb,YAAY,EACZ,SAAS,EACT,UAAU,EACV,gBAAgB,EAChB,mBAAmB,EAEnB,UAAU,IAAI,WAAW,EACzB,UAAU,IAAI,WAAW,EACzB,gBAAgB,IAAI,iBAAiB,EACrC,gBAAgB,IAAI,iBAAiB,EACrC,SAAS,IAAI,eAAe,GAC/B,MAAM,aAAa,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/index.js b/node_modules/webdav/node_modules/entities/dist/esm/index.js new file mode 100644 index 00000000..17576a86 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/index.js @@ -0,0 +1,107 @@ +import { decodeXML, decodeHTML, DecodingMode } from "./decode.js"; +import { encodeHTML, encodeNonAsciiHTML } from "./encode.js"; +import { encodeXML, escapeUTF8, escapeAttribute, escapeText, } from "./escape.js"; +/** The level of entities to support. */ +export var EntityLevel; +(function (EntityLevel) { + /** Support only XML entities. */ + EntityLevel[EntityLevel["XML"] = 0] = "XML"; + /** Support HTML entities, which are a superset of XML entities. */ + EntityLevel[EntityLevel["HTML"] = 1] = "HTML"; +})(EntityLevel || (EntityLevel = {})); +export var EncodingMode; +(function (EncodingMode) { + /** + * The output is UTF-8 encoded. Only characters that need escaping within + * XML will be escaped. + */ + EncodingMode[EncodingMode["UTF8"] = 0] = "UTF8"; + /** + * The output consists only of ASCII characters. Characters that need + * escaping within HTML, and characters that aren't ASCII characters will + * be escaped. + */ + EncodingMode[EncodingMode["ASCII"] = 1] = "ASCII"; + /** + * Encode all characters that have an equivalent entity, as well as all + * characters that are not ASCII characters. + */ + EncodingMode[EncodingMode["Extensive"] = 2] = "Extensive"; + /** + * Encode all characters that have to be escaped in HTML attributes, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + */ + EncodingMode[EncodingMode["Attribute"] = 3] = "Attribute"; + /** + * Encode all characters that have to be escaped in HTML text, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + */ + EncodingMode[EncodingMode["Text"] = 4] = "Text"; +})(EncodingMode || (EncodingMode = {})); +/** + * Decodes a string with entities. + * + * @param input String to decode. + * @param options Decoding options. + */ +export function decode(input, options = EntityLevel.XML) { + const level = typeof options === "number" ? options : options.level; + if (level === EntityLevel.HTML) { + const mode = typeof options === "object" ? options.mode : undefined; + return decodeHTML(input, mode); + } + return decodeXML(input); +} +/** + * Decodes a string with entities. Does not allow missing trailing semicolons for entities. + * + * @param input String to decode. + * @param options Decoding options. + * @deprecated Use `decode` with the `mode` set to `Strict`. + */ +export function decodeStrict(input, options = EntityLevel.XML) { + var _a; + const normalizedOptions = typeof options === "number" ? { level: options } : options; + (_a = normalizedOptions.mode) !== null && _a !== void 0 ? _a : (normalizedOptions.mode = DecodingMode.Strict); + return decode(input, normalizedOptions); +} +/** + * Encodes a string with entities. + * + * @param input String to encode. + * @param options Encoding options. + */ +export function encode(input, options = EntityLevel.XML) { + const { mode = EncodingMode.Extensive, level = EntityLevel.XML } = typeof options === "number" ? { level: options } : options; + switch (mode) { + case EncodingMode.UTF8: { + return escapeUTF8(input); + } + case EncodingMode.Attribute: { + return escapeAttribute(input); + } + case EncodingMode.Text: { + return escapeText(input); + } + case EncodingMode.ASCII: { + return level === EntityLevel.HTML + ? encodeNonAsciiHTML(input) + : encodeXML(input); + } + // eslint-disable-next-line unicorn/no-useless-switch-case + case EncodingMode.Extensive: + default: { + return level === EntityLevel.HTML + ? encodeHTML(input) + : encodeXML(input); + } + } +} +export { encodeXML, escape, escapeUTF8, escapeAttribute, escapeText, } from "./escape.js"; +export { encodeHTML, encodeNonAsciiHTML, +// Legacy aliases (deprecated) +encodeHTML as encodeHTML4, encodeHTML as encodeHTML5, } from "./encode.js"; +export { EntityDecoder, DecodingMode, decodeXML, decodeHTML, decodeHTMLStrict, decodeHTMLAttribute, +// Legacy aliases (deprecated) +decodeHTML as decodeHTML4, decodeHTML as decodeHTML5, decodeHTMLStrict as decodeHTML4Strict, decodeHTMLStrict as decodeHTML5Strict, decodeXML as decodeXMLStrict, } from "./decode.js"; +//# sourceMappingURL=index.js.map \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/index.js.map b/node_modules/webdav/node_modules/entities/dist/esm/index.js.map new file mode 100644 index 00000000..a52a5e32 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/index.js.map @@ -0,0 +1 @@ +{"version":3,"file":"index.js","sourceRoot":"","sources":["../../src/index.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,SAAS,EAAE,UAAU,EAAE,YAAY,EAAE,MAAM,aAAa,CAAC;AAClE,OAAO,EAAE,UAAU,EAAE,kBAAkB,EAAE,MAAM,aAAa,CAAC;AAC7D,OAAO,EACH,SAAS,EACT,UAAU,EACV,eAAe,EACf,UAAU,GACb,MAAM,aAAa,CAAC;AAErB,wCAAwC;AACxC,MAAM,CAAN,IAAY,WAKX;AALD,WAAY,WAAW;IACnB,iCAAiC;IACjC,2CAAO,CAAA;IACP,mEAAmE;IACnE,6CAAQ,CAAA;AACZ,CAAC,EALW,WAAW,KAAX,WAAW,QAKtB;AAED,MAAM,CAAN,IAAY,YA2BX;AA3BD,WAAY,YAAY;IACpB;;;OAGG;IACH,+CAAI,CAAA;IACJ;;;;OAIG;IACH,iDAAK,CAAA;IACL;;;OAGG;IACH,yDAAS,CAAA;IACT;;;OAGG;IACH,yDAAS,CAAA;IACT;;;OAGG;IACH,+CAAI,CAAA;AACR,CAAC,EA3BW,YAAY,KAAZ,YAAY,QA2BvB;AAsBD;;;;;GAKG;AACH,MAAM,UAAU,MAAM,CAClB,KAAa,EACb,UAAyC,WAAW,CAAC,GAAG;IAExD,MAAM,KAAK,GAAG,OAAO,OAAO,KAAK,QAAQ,CAAC,CAAC,CAAC,OAAO,CAAC,CAAC,CAAC,OAAO,CAAC,KAAK,CAAC;IAEpE,IAAI,KAAK,KAAK,WAAW,CAAC,IAAI,EAAE,CAAC;QAC7B,MAAM,IAAI,GAAG,OAAO,OAAO,KAAK,QAAQ,CAAC,CAAC,CAAC,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,SAAS,CAAC;QACpE,OAAO,UAAU,CAAC,KAAK,EAAE,IAAI,CAAC,CAAC;IACnC,CAAC;IAED,OAAO,SAAS,CAAC,KAAK,CAAC,CAAC;AAC5B,CAAC;AAED;;;;;;GAMG;AACH,MAAM,UAAU,YAAY,CACxB,KAAa,EACb,UAAyC,WAAW,CAAC,GAAG;;IAExD,MAAM,iBAAiB,GACnB,OAAO,OAAO,KAAK,QAAQ,CAAC,CAAC,CAAC,EAAE,KAAK,EAAE,OAAO,EAAE,CAAC,CAAC,CAAC,OAAO,CAAC;IAC/D,MAAA,iBAAiB,CAAC,IAAI,oCAAtB,iBAAiB,CAAC,IAAI,GAAK,YAAY,CAAC,MAAM,EAAC;IAE/C,OAAO,MAAM,CAAC,KAAK,EAAE,iBAAiB,CAAC,CAAC;AAC5C,CAAC;AAkBD;;;;;GAKG;AACH,MAAM,UAAU,MAAM,CAClB,KAAa,EACb,UAAyC,WAAW,CAAC,GAAG;IAExD,MAAM,EAAE,IAAI,GAAG,YAAY,CAAC,SAAS,EAAE,KAAK,GAAG,WAAW,CAAC,GAAG,EAAE,GAC5D,OAAO,OAAO,KAAK,QAAQ,CAAC,CAAC,CAAC,EAAE,KAAK,EAAE,OAAO,EAAE,CAAC,CAAC,CAAC,OAAO,CAAC;IAE/D,QAAQ,IAAI,EAAE,CAAC;QACX,KAAK,YAAY,CAAC,IAAI,CAAC,CAAC,CAAC;YACrB,OAAO,UAAU,CAAC,KAAK,CAAC,CAAC;QAC7B,CAAC;QACD,KAAK,YAAY,CAAC,SAAS,CAAC,CAAC,CAAC;YAC1B,OAAO,eAAe,CAAC,KAAK,CAAC,CAAC;QAClC,CAAC;QACD,KAAK,YAAY,CAAC,IAAI,CAAC,CAAC,CAAC;YACrB,OAAO,UAAU,CAAC,KAAK,CAAC,CAAC;QAC7B,CAAC;QACD,KAAK,YAAY,CAAC,KAAK,CAAC,CAAC,CAAC;YACtB,OAAO,KAAK,KAAK,WAAW,CAAC,IAAI;gBAC7B,CAAC,CAAC,kBAAkB,CAAC,KAAK,CAAC;gBAC3B,CAAC,CAAC,SAAS,CAAC,KAAK,CAAC,CAAC;QAC3B,CAAC;QACD,0DAA0D;QAC1D,KAAK,YAAY,CAAC,SAAS,CAAC;QAC5B,OAAO,CAAC,CAAC,CAAC;YACN,OAAO,KAAK,KAAK,WAAW,CAAC,IAAI;gBAC7B,CAAC,CAAC,UAAU,CAAC,KAAK,CAAC;gBACnB,CAAC,CAAC,SAAS,CAAC,KAAK,CAAC,CAAC;QAC3B,CAAC;IACL,CAAC;AACL,CAAC;AAED,OAAO,EACH,SAAS,EACT,MAAM,EACN,UAAU,EACV,eAAe,EACf,UAAU,GACb,MAAM,aAAa,CAAC;AAErB,OAAO,EACH,UAAU,EACV,kBAAkB;AAClB,8BAA8B;AAC9B,UAAU,IAAI,WAAW,EACzB,UAAU,IAAI,WAAW,GAC5B,MAAM,aAAa,CAAC;AAErB,OAAO,EACH,aAAa,EACb,YAAY,EACZ,SAAS,EACT,UAAU,EACV,gBAAgB,EAChB,mBAAmB;AACnB,8BAA8B;AAC9B,UAAU,IAAI,WAAW,EACzB,UAAU,IAAI,WAAW,EACzB,gBAAgB,IAAI,iBAAiB,EACrC,gBAAgB,IAAI,iBAAiB,EACrC,SAAS,IAAI,eAAe,GAC/B,MAAM,aAAa,CAAC"} \ No newline at end of file diff --git a/node_modules/webdav/node_modules/entities/dist/esm/package.json b/node_modules/webdav/node_modules/entities/dist/esm/package.json new file mode 100644 index 00000000..3dbc1ca5 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/dist/esm/package.json @@ -0,0 +1,3 @@ +{ + "type": "module" +} diff --git a/node_modules/webdav/node_modules/entities/escape.js b/node_modules/webdav/node_modules/entities/escape.js new file mode 100644 index 00000000..5caf41ac --- /dev/null +++ b/node_modules/webdav/node_modules/entities/escape.js @@ -0,0 +1,3 @@ +// Make exports work in Node < 12 +// eslint-disable-next-line no-undef, unicorn/prefer-module +module.exports = require("./dist/commonjs/escape.js"); diff --git a/node_modules/webdav/node_modules/entities/package.json b/node_modules/webdav/node_modules/entities/package.json new file mode 100644 index 00000000..751e99bc --- /dev/null +++ b/node_modules/webdav/node_modules/entities/package.json @@ -0,0 +1,116 @@ +{ + "name": "entities", + "version": "6.0.0", + "description": "Encode & decode XML and HTML entities with ease & speed", + "keywords": [ + "html entities", + "entity decoder", + "entity encoding", + "html decoding", + "html encoding", + "xml decoding", + "xml encoding" + ], + "repository": { + "type": "git", + "url": "git://github.com/fb55/entities.git" + }, + "funding": "https://github.com/fb55/entities?sponsor=1", + "license": "BSD-2-Clause", + "author": "Felix Boehm ", + "sideEffects": false, + "type": "module", + "exports": { + ".": { + "import": { + "types": "./dist/esm/index.d.ts", + "default": "./dist/esm/index.js" + }, + "require": { + "types": "./dist/commonjs/index.d.ts", + "default": "./dist/commonjs/index.js" + } + }, + "./decode": { + "import": { + "types": "./dist/esm/decode.d.ts", + "default": "./dist/esm/decode.js" + }, + "require": { + "types": "./dist/commonjs/decode.d.ts", + "default": "./dist/commonjs/decode.js" + } + }, + "./escape": { + "import": { + "types": "./dist/esm/escape.d.ts", + "default": "./dist/esm/escape.js" + }, + "require": { + "types": "./dist/commonjs/escape.d.ts", + "default": "./dist/commonjs/escape.js" + } + } + }, + "main": "./dist/commonjs/index.js", + "module": "./dist/esm/index.js", + "types": "./dist/commonjs/index.d.ts", + "files": [ + "decode.js", + "escape.js", + "dist", + "src" + ], + "scripts": { + "build:docs": "typedoc --hideGenerator src/index.ts", + "build:encode-trie": "node --import=tsx scripts/write-encode-map.ts", + "build:trie": "node --import=tsx scripts/write-decode-map.ts", + "format": "npm run format:es && npm run format:prettier", + "format:es": "npm run lint:es -- --fix", + "format:prettier": "npm run prettier -- --write", + "lint": "npm run lint:es && npm run lint:ts && npm run lint:prettier", + "lint:es": "eslint . --ignore-path .gitignore", + "lint:prettier": "npm run prettier -- --check", + "lint:ts": "tsc --noEmit", + "prepublishOnly": "tshy", + "prettier": "prettier '**/*.{ts,md,json,yml}'", + "test": "npm run test:vi && npm run lint", + "test:vi": "vitest run" + }, + "prettier": { + "proseWrap": "always", + "tabWidth": 4 + }, + "devDependencies": { + "@types/node": "^22.10.2", + "@typescript-eslint/eslint-plugin": "^8.18.1", + "@typescript-eslint/parser": "^8.18.0", + "@vitest/coverage-v8": "^2.1.8", + "eslint": "^8.57.1", + "eslint-config-prettier": "^9.1.0", + "eslint-plugin-n": "^17.15.1", + "eslint-plugin-unicorn": "^56.0.1", + "prettier": "^3.4.2", + "tshy": "^3.0.2", + "tsx": "^4.19.2", + "typedoc": "^0.27.5", + "typescript": "^5.7.2", + "vitest": "^2.0.2" + }, + "engines": { + "node": ">=0.12" + }, + "tshy": { + "exclude": [ + "**/*.spec.ts", + "**/__fixtures__/*", + "**/__tests__/*", + "**/__snapshots__/*" + ], + "exports": { + ".": "./src/index.ts", + "./decode": "./src/decode.ts", + "./escape": "./src/escape.ts" + } + } +} diff --git a/node_modules/webdav/node_modules/entities/readme.md b/node_modules/webdav/node_modules/entities/readme.md new file mode 100644 index 00000000..20c88b5f --- /dev/null +++ b/node_modules/webdav/node_modules/entities/readme.md @@ -0,0 +1,122 @@ +# entities [![NPM version](https://img.shields.io/npm/v/entities.svg)](https://npmjs.org/package/entities) [![Downloads](https://img.shields.io/npm/dm/entities.svg)](https://npmjs.org/package/entities) [![Node.js CI](https://github.com/fb55/entities/actions/workflows/nodejs-test.yml/badge.svg)](https://github.com/fb55/entities/actions/workflows/nodejs-test.yml) + +Encode & decode HTML & XML entities with ease & speed. + +## Features + +- 😇 Tried and true: `entities` is used by many popular libraries; eg. + [`htmlparser2`](https://github.com/fb55/htmlparser2), the official + [AWS SDK](https://github.com/aws/aws-sdk-js-v3) and + [`commonmark`](https://github.com/commonmark/commonmark.js) use it to process + HTML entities. +- ⚡️ Fast: `entities` is the fastest library for decoding HTML entities (as of + April 2022); see [performance](#performance). +- 🎛 Configurable: Get an output tailored for your needs. You are fine with + UTF8? That'll save you some bytes. Prefer to only have ASCII characters? We + can do that as well! + +## How to… + +### …install `entities` + + npm install entities + +### …use `entities` + +```javascript +const entities = require("entities"); + +// Encoding +entities.escapeUTF8("& ü"); // "&#38; ü" +entities.encodeXML("& ü"); // "&#38; ü" +entities.encodeHTML("& ü"); // "&#38; ü" + +// Decoding +entities.decodeXML("asdf & ÿ ü '"); // "asdf & ÿ ü '" +entities.decodeHTML("asdf & ÿ ü '"); // "asdf & ÿ ü '" +``` + +## Performance + +This is how `entities` compares to other libraries on a very basic benchmark +(see `scripts/benchmark.ts`, for 10,000,000 iterations; **lower is better**): + +| Library | Version | `decode` perf | `encode` perf | `escape` perf | +| -------------- | ------- | ------------- | ------------- | ------------- | +| entities | `3.0.1` | 1.418s | 6.786s | 2.196s | +| html-entities | `2.3.2` | 2.530s | 6.829s | 2.415s | +| he | `1.2.0` | 5.800s | 24.237s | 3.624s | +| parse-entities | `3.0.0` | 9.660s | N/A | N/A | + +--- + +## FAQ + +> What methods should I actually use to encode my documents? + +If your target supports UTF-8, the `escapeUTF8` method is going to be your best +choice. Otherwise, use either `encodeHTML` or `encodeXML` based on whether +you're dealing with an HTML or an XML document. + +You can have a look at the options for the `encode` and `decode` methods to see +everything you can configure. + +> When should I use strict decoding? + +When strict decoding, entities not terminated with a semicolon will be ignored. +This is helpful for decoding entities in legacy environments. + +> Why should I use `entities` instead of alternative modules? + +As of April 2022, `entities` is a bit faster than other modules. Still, this is +not a very differentiated space and other modules can catch up. + +**More importantly**, you might already have `entities` in your dependency graph +(as a dependency of eg. `cheerio`, or `htmlparser2`), and including it directly +might not even increase your bundle size. The same is true for other entity +libraries, so have a look through your `node_modules` directory! + +> Does `entities` support tree shaking? + +Yes! `entities` ships as both a CommonJS and a ES module. Note that for best +results, you should not use the `encode` and `decode` functions, as they wrap +around a number of other functions, all of which will remain in the bundle. +Instead, use the functions that you need directly. + +--- + +## Acknowledgements + +This library wouldn't be possible without the work of these individuals. Thanks +to + +- [@mathiasbynens](https://github.com/mathiasbynens) for his explanations about + character encodings, and his library `he`, which was one of the inspirations + for `entities` +- [@inikulin](https://github.com/inikulin) for his work on optimized tries for + decoding HTML entities for the `parse5` project +- [@mdevils](https://github.com/mdevils) for taking on the challenge of + producing a quick entity library with his `html-entities` library. `entities` + would be quite a bit slower if there wasn't any competition. Right now + `entities` is on top, but we'll see how long that lasts! + +--- + +License: BSD-2-Clause + +## Security contact information + +To report a security vulnerability, please use the +[Tidelift security contact](https://tidelift.com/security). Tidelift will +coordinate the fix and disclosure. + +## `entities` for enterprise + +Available as part of the Tidelift Subscription + +The maintainers of `entities` and thousands of other packages are working with +Tidelift to deliver commercial support and maintenance for the open source +dependencies you use to build your applications. Save time, reduce risk, and +improve code health, while paying the maintainers of the exact dependencies you +use. +[Learn more.](https://tidelift.com/subscription/pkg/npm-entities?utm_source=npm-entities&utm_medium=referral&utm_campaign=enterprise&utm_term=repo) diff --git a/node_modules/webdav/node_modules/entities/src/decode-codepoint.ts b/node_modules/webdav/node_modules/entities/src/decode-codepoint.ts new file mode 100644 index 00000000..d21de7bf --- /dev/null +++ b/node_modules/webdav/node_modules/entities/src/decode-codepoint.ts @@ -0,0 +1,81 @@ +// Adapted from https://github.com/mathiasbynens/he/blob/36afe179392226cf1b6ccdb16ebbb7a5a844d93a/src/he.js#L106-L134 + +const decodeMap = new Map([ + [0, 65_533], + // C1 Unicode control character reference replacements + [128, 8364], + [130, 8218], + [131, 402], + [132, 8222], + [133, 8230], + [134, 8224], + [135, 8225], + [136, 710], + [137, 8240], + [138, 352], + [139, 8249], + [140, 338], + [142, 381], + [145, 8216], + [146, 8217], + [147, 8220], + [148, 8221], + [149, 8226], + [150, 8211], + [151, 8212], + [152, 732], + [153, 8482], + [154, 353], + [155, 8250], + [156, 339], + [158, 382], + [159, 376], +]); + +/** + * Polyfill for `String.fromCodePoint`. It is used to create a string from a Unicode code point. + */ +export const fromCodePoint: (...codePoints: number[]) => string = + // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition, n/no-unsupported-features/es-builtins + String.fromCodePoint ?? + function (codePoint: number): string { + let output = ""; + + if (codePoint > 0xff_ff) { + codePoint -= 0x1_00_00; + output += String.fromCharCode( + ((codePoint >>> 10) & 0x3_ff) | 0xd8_00, + ); + codePoint = 0xdc_00 | (codePoint & 0x3_ff); + } + + output += String.fromCharCode(codePoint); + return output; + }; + +/** + * Replace the given code point with a replacement character if it is a + * surrogate or is outside the valid range. Otherwise return the code + * point unchanged. + */ +export function replaceCodePoint(codePoint: number): number { + if ( + (codePoint >= 0xd8_00 && codePoint <= 0xdf_ff) || + codePoint > 0x10_ff_ff + ) { + return 0xff_fd; + } + + return decodeMap.get(codePoint) ?? codePoint; +} + +/** + * Replace the code point if relevant, then convert it to a string. + * + * @deprecated Use `fromCodePoint(replaceCodePoint(codePoint))` instead. + * @param codePoint The code point to decode. + * @returns The decoded code point. + */ +export function decodeCodePoint(codePoint: number): string { + return fromCodePoint(replaceCodePoint(codePoint)); +} diff --git a/node_modules/webdav/node_modules/entities/src/decode.spec.ts b/node_modules/webdav/node_modules/entities/src/decode.spec.ts new file mode 100644 index 00000000..6ab37d41 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/src/decode.spec.ts @@ -0,0 +1,320 @@ +import { describe, it, expect, vitest } from "vitest"; +import * as entities from "./decode.js"; + +describe("Decode test", () => { + const testcases = [ + { input: "&amp;", output: "&" }, + { input: "&#38;", output: "&" }, + { input: "&#x26;", output: "&" }, + { input: "&#X26;", output: "&" }, + { input: "&#38;", output: "&" }, + { input: "&#38;", output: "&" }, + { input: "&#38;", output: "&" }, + { input: ":", output: ":" }, + { input: ":", output: ":" }, + { input: ":", output: ":" }, + { input: ":", output: ":" }, + { input: "&#", output: "&#" }, + { input: "&>", output: "&>" }, + { input: "id=770&#anchor", output: "id=770&#anchor" }, + ]; + + for (const { input, output } of testcases) { + it(`should XML decode ${input}`, () => + expect(entities.decodeXML(input)).toBe(output)); + it(`should HTML decode ${input}`, () => + expect(entities.decodeHTML(input)).toBe(output)); + } + + it("should HTML decode partial legacy entity", () => { + expect(entities.decodeHTMLStrict("×bar")).toBe("×bar"); + expect(entities.decodeHTML("×bar")).toBe("×bar"); + }); + + it("should HTML decode legacy entities according to spec", () => + expect(entities.decodeHTML("?&image_uri=1&ℑ=2&image=3")).toBe( + "?&image_uri=1&ℑ=2&image=3", + )); + + it("should back out of legacy entities", () => + expect(entities.decodeHTML("&a")).toBe("&a")); + + it("should not parse numeric entities in strict mode", () => + expect(entities.decodeHTMLStrict("7")).toBe("7")); + + it("should parse   followed by < (#852)", () => + expect(entities.decodeHTML(" <")).toBe("\u00A0<")); + + it("should decode trailing legacy entities", () => { + expect(entities.decodeHTML("⨱×bar")).toBe("⨱×bar"); + }); + + it("should decode multi-byte entities", () => { + expect(entities.decodeHTML("≧̸")).toBe("≧̸"); + }); + + it("should not decode legacy entities followed by text in attribute mode", () => { + expect( + entities.decodeHTML("¬", entities.DecodingMode.Attribute), + ).toBe("¬"); + + expect( + entities.decodeHTML("¬i", entities.DecodingMode.Attribute), + ).toBe("¬i"); + + expect( + entities.decodeHTML("¬=", entities.DecodingMode.Attribute), + ).toBe("¬="); + + expect(entities.decodeHTMLAttribute("¬p")).toBe("¬p"); + expect(entities.decodeHTMLAttribute("¬P")).toBe("¬P"); + expect(entities.decodeHTMLAttribute("¬3")).toBe("¬3"); + }); +}); + +describe("EntityDecoder", () => { + it("should decode decimal entities", () => { + const callback = vitest.fn(); + const decoder = new entities.EntityDecoder( + entities.htmlDecodeTree, + callback, + ); + + expect(decoder.write("", 1)).toBe(-1); + expect(decoder.write("8;", 0)).toBe(5); + + expect(callback).toHaveBeenCalledTimes(1); + expect(callback).toHaveBeenCalledWith(":".charCodeAt(0), 5); + }); + + it("should decode hex entities", () => { + const callback = vitest.fn(); + const decoder = new entities.EntityDecoder( + entities.htmlDecodeTree, + callback, + ); + + expect(decoder.write(":", 1)).toBe(6); + + expect(callback).toHaveBeenCalledTimes(1); + expect(callback).toHaveBeenCalledWith(":".charCodeAt(0), 6); + }); + + it("should decode named entities", () => { + const callback = vitest.fn(); + const decoder = new entities.EntityDecoder( + entities.htmlDecodeTree, + callback, + ); + + expect(decoder.write("&", 1)).toBe(5); + + expect(callback).toHaveBeenCalledTimes(1); + expect(callback).toHaveBeenCalledWith("&".charCodeAt(0), 5); + }); + + it("should decode legacy entities", () => { + const callback = vitest.fn(); + const decoder = new entities.EntityDecoder( + entities.htmlDecodeTree, + callback, + ); + decoder.startEntity(entities.DecodingMode.Legacy); + + expect(decoder.write("&", 1)).toBe(-1); + + expect(callback).toHaveBeenCalledTimes(0); + + expect(decoder.end()).toBe(4); + + expect(callback).toHaveBeenCalledTimes(1); + expect(callback).toHaveBeenCalledWith("&".charCodeAt(0), 4); + }); + + it("should decode named entity written character by character", () => { + const callback = vitest.fn(); + const decoder = new entities.EntityDecoder( + entities.htmlDecodeTree, + callback, + ); + + for (const c of "amp") { + expect(decoder.write(c, 0)).toBe(-1); + } + expect(decoder.write(";", 0)).toBe(5); + + expect(callback).toHaveBeenCalledTimes(1); + expect(callback).toHaveBeenCalledWith("&".charCodeAt(0), 5); + }); + + it("should decode numeric entity written character by character", () => { + const callback = vitest.fn(); + const decoder = new entities.EntityDecoder( + entities.htmlDecodeTree, + callback, + ); + + for (const c of "#x3a") { + expect(decoder.write(c, 0)).toBe(-1); + } + expect(decoder.write(";", 0)).toBe(6); + + expect(callback).toHaveBeenCalledTimes(1); + expect(callback).toHaveBeenCalledWith(":".charCodeAt(0), 6); + }); + + it("should decode hex entities across several chunks", () => { + const callback = vitest.fn(); + const decoder = new entities.EntityDecoder( + entities.htmlDecodeTree, + callback, + ); + + for (const chunk of ["#x", "cf", "ff", "d"]) { + expect(decoder.write(chunk, 0)).toBe(-1); + } + + expect(decoder.write(";", 0)).toBe(9); + expect(callback).toHaveBeenCalledTimes(1); + expect(callback).toHaveBeenCalledWith(0xc_ff_fd, 9); + }); + + it("should not fail if nothing is written", () => { + const callback = vitest.fn(); + const decoder = new entities.EntityDecoder( + entities.htmlDecodeTree, + callback, + ); + + expect(decoder.end()).toBe(0); + expect(callback).toHaveBeenCalledTimes(0); + }); + + describe("errors", () => { + it("should produce an error for a named entity without a semicolon", () => { + const errorHandlers = { + missingSemicolonAfterCharacterReference: vitest.fn(), + absenceOfDigitsInNumericCharacterReference: vitest.fn(), + validateNumericCharacterReference: vitest.fn(), + }; + const callback = vitest.fn(); + const decoder = new entities.EntityDecoder( + entities.htmlDecodeTree, + callback, + errorHandlers, + ); + + decoder.startEntity(entities.DecodingMode.Legacy); + expect(decoder.write("&", 1)).toBe(5); + expect(callback).toHaveBeenCalledTimes(1); + expect(callback).toHaveBeenCalledWith("&".charCodeAt(0), 5); + expect( + errorHandlers.missingSemicolonAfterCharacterReference, + ).toHaveBeenCalledTimes(0); + + decoder.startEntity(entities.DecodingMode.Legacy); + expect(decoder.write("&", 1)).toBe(-1); + expect(decoder.end()).toBe(4); + + expect(callback).toHaveBeenCalledTimes(2); + expect(callback).toHaveBeenLastCalledWith("&".charCodeAt(0), 4); + expect( + errorHandlers.missingSemicolonAfterCharacterReference, + ).toHaveBeenCalledTimes(1); + }); + + it("should produce an error for a numeric entity without a semicolon", () => { + const errorHandlers = { + missingSemicolonAfterCharacterReference: vitest.fn(), + absenceOfDigitsInNumericCharacterReference: vitest.fn(), + validateNumericCharacterReference: vitest.fn(), + }; + const callback = vitest.fn(); + const decoder = new entities.EntityDecoder( + entities.htmlDecodeTree, + callback, + errorHandlers, + ); + + decoder.startEntity(entities.DecodingMode.Legacy); + expect(decoder.write(":", 1)).toBe(-1); + expect(decoder.end()).toBe(5); + + expect(callback).toHaveBeenCalledTimes(1); + expect(callback).toHaveBeenCalledWith(0x3a, 5); + expect( + errorHandlers.missingSemicolonAfterCharacterReference, + ).toHaveBeenCalledTimes(1); + expect( + errorHandlers.absenceOfDigitsInNumericCharacterReference, + ).toHaveBeenCalledTimes(0); + expect( + errorHandlers.validateNumericCharacterReference, + ).toHaveBeenCalledTimes(1); + expect( + errorHandlers.validateNumericCharacterReference, + ).toHaveBeenCalledWith(0x3a); + }); + + it("should produce an error for numeric entities without digits", () => { + const errorHandlers = { + missingSemicolonAfterCharacterReference: vitest.fn(), + absenceOfDigitsInNumericCharacterReference: vitest.fn(), + validateNumericCharacterReference: vitest.fn(), + }; + const callback = vitest.fn(); + const decoder = new entities.EntityDecoder( + entities.htmlDecodeTree, + callback, + errorHandlers, + ); + + decoder.startEntity(entities.DecodingMode.Legacy); + expect(decoder.write("&#", 1)).toBe(-1); + expect(decoder.end()).toBe(0); + + expect(callback).toHaveBeenCalledTimes(0); + expect( + errorHandlers.missingSemicolonAfterCharacterReference, + ).toHaveBeenCalledTimes(0); + expect( + errorHandlers.absenceOfDigitsInNumericCharacterReference, + ).toHaveBeenCalledTimes(1); + expect( + errorHandlers.absenceOfDigitsInNumericCharacterReference, + ).toHaveBeenCalledWith(2); + expect( + errorHandlers.validateNumericCharacterReference, + ).toHaveBeenCalledTimes(0); + }); + + it("should produce an error for hex entities without digits", () => { + const errorHandlers = { + missingSemicolonAfterCharacterReference: vitest.fn(), + absenceOfDigitsInNumericCharacterReference: vitest.fn(), + validateNumericCharacterReference: vitest.fn(), + }; + const callback = vitest.fn(); + const decoder = new entities.EntityDecoder( + entities.htmlDecodeTree, + callback, + errorHandlers, + ); + + decoder.startEntity(entities.DecodingMode.Legacy); + expect(decoder.write("&#x", 1)).toBe(-1); + expect(decoder.end()).toBe(0); + + expect(callback).toHaveBeenCalledTimes(0); + expect( + errorHandlers.missingSemicolonAfterCharacterReference, + ).toHaveBeenCalledTimes(0); + expect( + errorHandlers.absenceOfDigitsInNumericCharacterReference, + ).toHaveBeenCalledTimes(1); + expect( + errorHandlers.validateNumericCharacterReference, + ).toHaveBeenCalledTimes(0); + }); + }); +}); diff --git a/node_modules/webdav/node_modules/entities/src/decode.ts b/node_modules/webdav/node_modules/entities/src/decode.ts new file mode 100644 index 00000000..99f775cd --- /dev/null +++ b/node_modules/webdav/node_modules/entities/src/decode.ts @@ -0,0 +1,620 @@ +import { htmlDecodeTree } from "./generated/decode-data-html.js"; +import { xmlDecodeTree } from "./generated/decode-data-xml.js"; +import { replaceCodePoint, fromCodePoint } from "./decode-codepoint.js"; + +const enum CharCodes { + NUM = 35, // "#" + SEMI = 59, // ";" + EQUALS = 61, // "=" + ZERO = 48, // "0" + NINE = 57, // "9" + LOWER_A = 97, // "a" + LOWER_F = 102, // "f" + LOWER_X = 120, // "x" + LOWER_Z = 122, // "z" + UPPER_A = 65, // "A" + UPPER_F = 70, // "F" + UPPER_Z = 90, // "Z" +} + +/** Bit that needs to be set to convert an upper case ASCII character to lower case */ +const TO_LOWER_BIT = 0b10_0000; + +export enum BinTrieFlags { + VALUE_LENGTH = 0b1100_0000_0000_0000, + BRANCH_LENGTH = 0b0011_1111_1000_0000, + JUMP_TABLE = 0b0000_0000_0111_1111, +} + +function isNumber(code: number): boolean { + return code >= CharCodes.ZERO && code <= CharCodes.NINE; +} + +function isHexadecimalCharacter(code: number): boolean { + return ( + (code >= CharCodes.UPPER_A && code <= CharCodes.UPPER_F) || + (code >= CharCodes.LOWER_A && code <= CharCodes.LOWER_F) + ); +} + +function isAsciiAlphaNumeric(code: number): boolean { + return ( + (code >= CharCodes.UPPER_A && code <= CharCodes.UPPER_Z) || + (code >= CharCodes.LOWER_A && code <= CharCodes.LOWER_Z) || + isNumber(code) + ); +} + +/** + * Checks if the given character is a valid end character for an entity in an attribute. + * + * Attribute values that aren't terminated properly aren't parsed, and shouldn't lead to a parser error. + * See the example in https://html.spec.whatwg.org/multipage/parsing.html#named-character-reference-state + */ +function isEntityInAttributeInvalidEnd(code: number): boolean { + return code === CharCodes.EQUALS || isAsciiAlphaNumeric(code); +} + +const enum EntityDecoderState { + EntityStart, + NumericStart, + NumericDecimal, + NumericHex, + NamedEntity, +} + +export enum DecodingMode { + /** Entities in text nodes that can end with any character. */ + Legacy = 0, + /** Only allow entities terminated with a semicolon. */ + Strict = 1, + /** Entities in attributes have limitations on ending characters. */ + Attribute = 2, +} + +/** + * Producers for character reference errors as defined in the HTML spec. + */ +export interface EntityErrorProducer { + missingSemicolonAfterCharacterReference(): void; + absenceOfDigitsInNumericCharacterReference( + consumedCharacters: number, + ): void; + validateNumericCharacterReference(code: number): void; +} + +/** + * Token decoder with support of writing partial entities. + */ +export class EntityDecoder { + constructor( + /** The tree used to decode entities. */ + private readonly decodeTree: Uint16Array, + /** + * The function that is called when a codepoint is decoded. + * + * For multi-byte named entities, this will be called multiple times, + * with the second codepoint, and the same `consumed` value. + * + * @param codepoint The decoded codepoint. + * @param consumed The number of bytes consumed by the decoder. + */ + private readonly emitCodePoint: (cp: number, consumed: number) => void, + /** An object that is used to produce errors. */ + private readonly errors?: EntityErrorProducer | undefined, + ) {} + + /** The current state of the decoder. */ + private state = EntityDecoderState.EntityStart; + /** Characters that were consumed while parsing an entity. */ + private consumed = 1; + /** + * The result of the entity. + * + * Either the result index of a numeric entity, or the codepoint of a + * numeric entity. + */ + private result = 0; + + /** The current index in the decode tree. */ + private treeIndex = 0; + /** The number of characters that were consumed in excess. */ + private excess = 1; + /** The mode in which the decoder is operating. */ + private decodeMode = DecodingMode.Strict; + + /** Resets the instance to make it reusable. */ + startEntity(decodeMode: DecodingMode): void { + this.decodeMode = decodeMode; + this.state = EntityDecoderState.EntityStart; + this.result = 0; + this.treeIndex = 0; + this.excess = 1; + this.consumed = 1; + } + + /** + * Write an entity to the decoder. This can be called multiple times with partial entities. + * If the entity is incomplete, the decoder will return -1. + * + * Mirrors the implementation of `getDecoder`, but with the ability to stop decoding if the + * entity is incomplete, and resume when the next string is written. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The offset at which the entity begins. Should be 0 if this is not the first call. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + write(input: string, offset: number): number { + switch (this.state) { + case EntityDecoderState.EntityStart: { + if (input.charCodeAt(offset) === CharCodes.NUM) { + this.state = EntityDecoderState.NumericStart; + this.consumed += 1; + return this.stateNumericStart(input, offset + 1); + } + this.state = EntityDecoderState.NamedEntity; + return this.stateNamedEntity(input, offset); + } + + case EntityDecoderState.NumericStart: { + return this.stateNumericStart(input, offset); + } + + case EntityDecoderState.NumericDecimal: { + return this.stateNumericDecimal(input, offset); + } + + case EntityDecoderState.NumericHex: { + return this.stateNumericHex(input, offset); + } + + case EntityDecoderState.NamedEntity: { + return this.stateNamedEntity(input, offset); + } + } + } + + /** + * Switches between the numeric decimal and hexadecimal states. + * + * Equivalent to the `Numeric character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + private stateNumericStart(input: string, offset: number): number { + if (offset >= input.length) { + return -1; + } + + if ((input.charCodeAt(offset) | TO_LOWER_BIT) === CharCodes.LOWER_X) { + this.state = EntityDecoderState.NumericHex; + this.consumed += 1; + return this.stateNumericHex(input, offset + 1); + } + + this.state = EntityDecoderState.NumericDecimal; + return this.stateNumericDecimal(input, offset); + } + + private addToNumericResult( + input: string, + start: number, + end: number, + base: number, + ): void { + if (start !== end) { + const digitCount = end - start; + this.result = + this.result * Math.pow(base, digitCount) + + Number.parseInt(input.substr(start, digitCount), base); + this.consumed += digitCount; + } + } + + /** + * Parses a hexadecimal numeric entity. + * + * Equivalent to the `Hexademical character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + private stateNumericHex(input: string, offset: number): number { + const startIndex = offset; + + while (offset < input.length) { + const char = input.charCodeAt(offset); + if (isNumber(char) || isHexadecimalCharacter(char)) { + offset += 1; + } else { + this.addToNumericResult(input, startIndex, offset, 16); + return this.emitNumericEntity(char, 3); + } + } + + this.addToNumericResult(input, startIndex, offset, 16); + + return -1; + } + + /** + * Parses a decimal numeric entity. + * + * Equivalent to the `Decimal character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + private stateNumericDecimal(input: string, offset: number): number { + const startIndex = offset; + + while (offset < input.length) { + const char = input.charCodeAt(offset); + if (isNumber(char)) { + offset += 1; + } else { + this.addToNumericResult(input, startIndex, offset, 10); + return this.emitNumericEntity(char, 2); + } + } + + this.addToNumericResult(input, startIndex, offset, 10); + + return -1; + } + + /** + * Validate and emit a numeric entity. + * + * Implements the logic from the `Hexademical character reference start + * state` and `Numeric character reference end state` in the HTML spec. + * + * @param lastCp The last code point of the entity. Used to see if the + * entity was terminated with a semicolon. + * @param expectedLength The minimum number of characters that should be + * consumed. Used to validate that at least one digit + * was consumed. + * @returns The number of characters that were consumed. + */ + private emitNumericEntity(lastCp: number, expectedLength: number): number { + // Ensure we consumed at least one digit. + if (this.consumed <= expectedLength) { + this.errors?.absenceOfDigitsInNumericCharacterReference( + this.consumed, + ); + return 0; + } + + // Figure out if this is a legit end of the entity + if (lastCp === CharCodes.SEMI) { + this.consumed += 1; + } else if (this.decodeMode === DecodingMode.Strict) { + return 0; + } + + this.emitCodePoint(replaceCodePoint(this.result), this.consumed); + + if (this.errors) { + if (lastCp !== CharCodes.SEMI) { + this.errors.missingSemicolonAfterCharacterReference(); + } + + this.errors.validateNumericCharacterReference(this.result); + } + + return this.consumed; + } + + /** + * Parses a named entity. + * + * Equivalent to the `Named character reference state` in the HTML spec. + * + * @param input The string containing the entity (or a continuation of the entity). + * @param offset The current offset. + * @returns The number of characters that were consumed, or -1 if the entity is incomplete. + */ + private stateNamedEntity(input: string, offset: number): number { + const { decodeTree } = this; + let current = decodeTree[this.treeIndex]; + // The mask is the number of bytes of the value, including the current byte. + let valueLength = (current & BinTrieFlags.VALUE_LENGTH) >> 14; + + for (; offset < input.length; offset++, this.excess++) { + const char = input.charCodeAt(offset); + + this.treeIndex = determineBranch( + decodeTree, + current, + this.treeIndex + Math.max(1, valueLength), + char, + ); + + if (this.treeIndex < 0) { + return this.result === 0 || + // If we are parsing an attribute + (this.decodeMode === DecodingMode.Attribute && + // We shouldn't have consumed any characters after the entity, + (valueLength === 0 || + // And there should be no invalid characters. + isEntityInAttributeInvalidEnd(char))) + ? 0 + : this.emitNotTerminatedNamedEntity(); + } + + current = decodeTree[this.treeIndex]; + valueLength = (current & BinTrieFlags.VALUE_LENGTH) >> 14; + + // If the branch is a value, store it and continue + if (valueLength !== 0) { + // If the entity is terminated by a semicolon, we are done. + if (char === CharCodes.SEMI) { + return this.emitNamedEntityData( + this.treeIndex, + valueLength, + this.consumed + this.excess, + ); + } + + // If we encounter a non-terminated (legacy) entity while parsing strictly, then ignore it. + if (this.decodeMode !== DecodingMode.Strict) { + this.result = this.treeIndex; + this.consumed += this.excess; + this.excess = 0; + } + } + } + + return -1; + } + + /** + * Emit a named entity that was not terminated with a semicolon. + * + * @returns The number of characters consumed. + */ + private emitNotTerminatedNamedEntity(): number { + const { result, decodeTree } = this; + + const valueLength = + (decodeTree[result] & BinTrieFlags.VALUE_LENGTH) >> 14; + + this.emitNamedEntityData(result, valueLength, this.consumed); + this.errors?.missingSemicolonAfterCharacterReference(); + + return this.consumed; + } + + /** + * Emit a named entity. + * + * @param result The index of the entity in the decode tree. + * @param valueLength The number of bytes in the entity. + * @param consumed The number of characters consumed. + * + * @returns The number of characters consumed. + */ + private emitNamedEntityData( + result: number, + valueLength: number, + consumed: number, + ): number { + const { decodeTree } = this; + + this.emitCodePoint( + valueLength === 1 + ? decodeTree[result] & ~BinTrieFlags.VALUE_LENGTH + : decodeTree[result + 1], + consumed, + ); + if (valueLength === 3) { + // For multi-byte values, we need to emit the second byte. + this.emitCodePoint(decodeTree[result + 2], consumed); + } + + return consumed; + } + + /** + * Signal to the parser that the end of the input was reached. + * + * Remaining data will be emitted and relevant errors will be produced. + * + * @returns The number of characters consumed. + */ + end(): number { + switch (this.state) { + case EntityDecoderState.NamedEntity: { + // Emit a named entity if we have one. + return this.result !== 0 && + (this.decodeMode !== DecodingMode.Attribute || + this.result === this.treeIndex) + ? this.emitNotTerminatedNamedEntity() + : 0; + } + // Otherwise, emit a numeric entity if we have one. + case EntityDecoderState.NumericDecimal: { + return this.emitNumericEntity(0, 2); + } + case EntityDecoderState.NumericHex: { + return this.emitNumericEntity(0, 3); + } + case EntityDecoderState.NumericStart: { + this.errors?.absenceOfDigitsInNumericCharacterReference( + this.consumed, + ); + return 0; + } + case EntityDecoderState.EntityStart: { + // Return 0 if we have no entity. + return 0; + } + } + } +} + +/** + * Creates a function that decodes entities in a string. + * + * @param decodeTree The decode tree. + * @returns A function that decodes entities in a string. + */ +function getDecoder(decodeTree: Uint16Array) { + let returnValue = ""; + const decoder = new EntityDecoder( + decodeTree, + (data) => (returnValue += fromCodePoint(data)), + ); + + return function decodeWithTrie( + input: string, + decodeMode: DecodingMode, + ): string { + let lastIndex = 0; + let offset = 0; + + while ((offset = input.indexOf("&", offset)) >= 0) { + returnValue += input.slice(lastIndex, offset); + + decoder.startEntity(decodeMode); + + const length = decoder.write( + input, + // Skip the "&" + offset + 1, + ); + + if (length < 0) { + lastIndex = offset + decoder.end(); + break; + } + + lastIndex = offset + length; + // If `length` is 0, skip the current `&` and continue. + offset = length === 0 ? lastIndex + 1 : lastIndex; + } + + const result = returnValue + input.slice(lastIndex); + + // Make sure we don't keep a reference to the final string. + returnValue = ""; + + return result; + }; +} + +/** + * Determines the branch of the current node that is taken given the current + * character. This function is used to traverse the trie. + * + * @param decodeTree The trie. + * @param current The current node. + * @param nodeIdx The index right after the current node and its value. + * @param char The current character. + * @returns The index of the next node, or -1 if no branch is taken. + */ +export function determineBranch( + decodeTree: Uint16Array, + current: number, + nodeIndex: number, + char: number, +): number { + const branchCount = (current & BinTrieFlags.BRANCH_LENGTH) >> 7; + const jumpOffset = current & BinTrieFlags.JUMP_TABLE; + + // Case 1: Single branch encoded in jump offset + if (branchCount === 0) { + return jumpOffset !== 0 && char === jumpOffset ? nodeIndex : -1; + } + + // Case 2: Multiple branches encoded in jump table + if (jumpOffset) { + const value = char - jumpOffset; + + return value < 0 || value >= branchCount + ? -1 + : decodeTree[nodeIndex + value] - 1; + } + + // Case 3: Multiple branches encoded in dictionary + + // Binary search for the character. + let lo = nodeIndex; + let hi = lo + branchCount - 1; + + while (lo <= hi) { + const mid = (lo + hi) >>> 1; + const midValue = decodeTree[mid]; + + if (midValue < char) { + lo = mid + 1; + } else if (midValue > char) { + hi = mid - 1; + } else { + return decodeTree[mid + branchCount]; + } + } + + return -1; +} + +const htmlDecoder = /* #__PURE__ */ getDecoder(htmlDecodeTree); +const xmlDecoder = /* #__PURE__ */ getDecoder(xmlDecodeTree); + +/** + * Decodes an HTML string. + * + * @param htmlString The string to decode. + * @param mode The decoding mode. + * @returns The decoded string. + */ +export function decodeHTML( + htmlString: string, + mode: DecodingMode = DecodingMode.Legacy, +): string { + return htmlDecoder(htmlString, mode); +} + +/** + * Decodes an HTML string in an attribute. + * + * @param htmlAttribute The string to decode. + * @returns The decoded string. + */ +export function decodeHTMLAttribute(htmlAttribute: string): string { + return htmlDecoder(htmlAttribute, DecodingMode.Attribute); +} + +/** + * Decodes an HTML string, requiring all entities to be terminated by a semicolon. + * + * @param htmlString The string to decode. + * @returns The decoded string. + */ +export function decodeHTMLStrict(htmlString: string): string { + return htmlDecoder(htmlString, DecodingMode.Strict); +} + +/** + * Decodes an XML string, requiring all entities to be terminated by a semicolon. + * + * @param xmlString The string to decode. + * @returns The decoded string. + */ +export function decodeXML(xmlString: string): string { + return xmlDecoder(xmlString, DecodingMode.Strict); +} + +// Re-export for use by eg. htmlparser2 +export { htmlDecodeTree } from "./generated/decode-data-html.js"; +export { xmlDecodeTree } from "./generated/decode-data-xml.js"; + +export { + decodeCodePoint, + replaceCodePoint, + fromCodePoint, +} from "./decode-codepoint.js"; diff --git a/node_modules/webdav/node_modules/entities/src/encode.spec.ts b/node_modules/webdav/node_modules/entities/src/encode.spec.ts new file mode 100644 index 00000000..10ff5de5 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/src/encode.spec.ts @@ -0,0 +1,78 @@ +import { describe, it, expect } from "vitest"; +import * as entities from "./index.js"; + +describe("Encode->decode test", () => { + const testcases = [ + { + input: "asdf & ÿ ü '", + xml: "asdf & ÿ ü '", + html: "asdf & ÿ ü '", + }, + { + input: "&", + xml: "&#38;", + html: "&#38;", + }, + ]; + + for (const { input, xml, html } of testcases) { + const encodedXML = entities.encodeXML(input); + it(`should XML encode ${input}`, () => expect(encodedXML).toBe(xml)); + it(`should default to XML encode ${input}`, () => + expect(entities.encode(input)).toBe(xml)); + it(`should XML decode ${encodedXML}`, () => + expect(entities.decodeXML(encodedXML)).toBe(input)); + it(`should default to XML encode ${encodedXML}`, () => + expect(entities.decode(encodedXML)).toBe(input)); + it(`should default strict to XML encode ${encodedXML}`, () => + expect(entities.decodeStrict(encodedXML)).toBe(input)); + + const encodedHTML5 = entities.encodeHTML5(input); + it(`should HTML5 encode ${input}`, () => + expect(encodedHTML5).toBe(html)); + it(`should HTML5 decode ${encodedHTML5}`, () => + expect(entities.decodeHTML(encodedHTML5)).toBe(input)); + it("should encode emojis", () => + expect(entities.encodeHTML5("😄🍾🥳💥😇")).toBe( + "😄🍾🥳💥😇", + )); + } + + it("should encode data URIs (issue #16)", () => { + const data = + "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAALAAABAAEAAAIBRAA7"; + expect(entities.decode(entities.encode(data))).toBe(data); + }); + + it("should HTML encode all ASCII characters", () => { + for (let index = 0; index < 128; index++) { + const char = String.fromCharCode(index); + const encoded = entities.encodeHTML(char); + const decoded = entities.decodeHTML(encoded); + expect(decoded).toBe(char); + } + }); + + it("should encode trailing parts of entities", () => + expect(entities.encodeHTML("\uD835")).toBe("�")); + + it("should encode surrogate pair with first surrogate equivalent of entity, without corresponding entity", () => + expect(entities.encodeHTML("\u{1D4A4}")).toBe("𝒤")); +}); + +describe("encodeNonAsciiHTML", () => { + it("should encode all non-ASCII characters", () => + expect(entities.encodeNonAsciiHTML(" #123! übermaßen")).toBe( + "<test> #123! übermaßen", + )); + + it("should encode emojis", () => + expect(entities.encodeNonAsciiHTML("😄🍾🥳💥😇")).toBe( + "😄🍾🥳💥😇", + )); + + it("should encode chars above surrogates", () => + expect(entities.encodeNonAsciiHTML("♒️♓️♈️♉️♊️♋️♌️♍️♎️♏️♐️♑️")).toBe( + "♒️♓️♈️♉️♊️♋️♌️♍️♎️♏️♐️♑️", + )); +}); diff --git a/node_modules/webdav/node_modules/entities/src/encode.ts b/node_modules/webdav/node_modules/entities/src/encode.ts new file mode 100644 index 00000000..5bb40a66 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/src/encode.ts @@ -0,0 +1,77 @@ +import { htmlTrie } from "./generated/encode-html.js"; +import { xmlReplacer, getCodePoint } from "./escape.js"; + +const htmlReplacer = /[\t\n\f!-,./:-@[-`{-}\u0080-\uFFFF]/g; + +/** + * Encodes all characters in the input using HTML entities. This includes + * characters that are valid ASCII characters in HTML documents, such as `#`. + * + * To get a more compact output, consider using the `encodeNonAsciiHTML` + * function, which will only encode characters that are not valid in HTML + * documents, as well as non-ASCII characters. + * + * If a character has no equivalent entity, a numeric hexadecimal reference + * (eg. `ü`) will be used. + */ +export function encodeHTML(input: string): string { + return encodeHTMLTrieRe(htmlReplacer, input); +} +/** + * Encodes all non-ASCII characters, as well as characters not valid in HTML + * documents using HTML entities. This function will not encode characters that + * are valid in HTML documents, such as `#`. + * + * If a character has no equivalent entity, a numeric hexadecimal reference + * (eg. `ü`) will be used. + */ +export function encodeNonAsciiHTML(input: string): string { + return encodeHTMLTrieRe(xmlReplacer, input); +} + +function encodeHTMLTrieRe(regExp: RegExp, input: string): string { + let returnValue = ""; + let lastIndex = 0; + let match; + + while ((match = regExp.exec(input)) !== null) { + const { index } = match; + returnValue += input.substring(lastIndex, index); + const char = input.charCodeAt(index); + let next = htmlTrie.get(char); + + if (typeof next === "object") { + // We are in a branch. Try to match the next char. + if (index + 1 < input.length) { + const nextChar = input.charCodeAt(index + 1); + const value = + typeof next.n === "number" + ? next.n === nextChar + ? next.o + : undefined + : next.n.get(nextChar); + + if (value !== undefined) { + returnValue += value; + lastIndex = regExp.lastIndex += 1; + continue; + } + } + + next = next.v; + } + + // We might have a tree node without a value; skip and use a numeric entity. + if (next === undefined) { + const cp = getCodePoint(input, index); + returnValue += `&#x${cp.toString(16)};`; + // Increase by 1 if we have a surrogate pair + lastIndex = regExp.lastIndex += Number(cp !== char); + } else { + returnValue += next; + lastIndex = index + 1; + } + } + + return returnValue + input.substr(lastIndex); +} diff --git a/node_modules/webdav/node_modules/entities/src/escape.spec.ts b/node_modules/webdav/node_modules/entities/src/escape.spec.ts new file mode 100644 index 00000000..582af1a1 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/src/escape.spec.ts @@ -0,0 +1,14 @@ +import { describe, it, expect } from "vitest"; +import * as entities from "./index.js"; + +describe("escape HTML", () => { + it("should escape HTML attribute values", () => + expect(entities.escapeAttribute(' & value \u00A0!')).toBe( + " & value  !", + )); + + it("should escape HTML text", () => + expect(entities.escapeText(' & value \u00A0!')).toBe( + '<a " text > & value  !', + )); +}); diff --git a/node_modules/webdav/node_modules/entities/src/escape.ts b/node_modules/webdav/node_modules/entities/src/escape.ts new file mode 100644 index 00000000..350c57b8 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/src/escape.ts @@ -0,0 +1,148 @@ +export const xmlReplacer: RegExp = /["$&'<>\u0080-\uFFFF]/g; + +const xmlCodeMap = new Map([ + [34, """], + [38, "&"], + [39, "'"], + [60, "<"], + [62, ">"], +]); + +// For compatibility with node < 4, we wrap `codePointAt` +export const getCodePoint: (c: string, index: number) => number = + // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition + String.prototype.codePointAt == null + ? (c: string, index: number): number => + (c.charCodeAt(index) & 0xfc_00) === 0xd8_00 + ? (c.charCodeAt(index) - 0xd8_00) * 0x4_00 + + c.charCodeAt(index + 1) - + 0xdc_00 + + 0x1_00_00 + : c.charCodeAt(index) + : // http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae + (input: string, index: number): number => input.codePointAt(index)!; + +/** + * Encodes all non-ASCII characters, as well as characters not valid in XML + * documents using XML entities. + * + * If a character has no equivalent entity, a + * numeric hexadecimal reference (eg. `ü`) will be used. + */ +export function encodeXML(input: string): string { + let returnValue = ""; + let lastIndex = 0; + let match; + + while ((match = xmlReplacer.exec(input)) !== null) { + const { index } = match; + const char = input.charCodeAt(index); + const next = xmlCodeMap.get(char); + + if (next === undefined) { + returnValue += `${input.substring(lastIndex, index)}&#x${getCodePoint( + input, + index, + ).toString(16)};`; + // Increase by 1 if we have a surrogate pair + lastIndex = xmlReplacer.lastIndex += Number( + (char & 0xfc_00) === 0xd8_00, + ); + } else { + returnValue += input.substring(lastIndex, index) + next; + lastIndex = index + 1; + } + } + + return returnValue + input.substr(lastIndex); +} + +/** + * Encodes all non-ASCII characters, as well as characters not valid in XML + * documents using numeric hexadecimal reference (eg. `ü`). + * + * Have a look at `escapeUTF8` if you want a more concise output at the expense + * of reduced transportability. + * + * @param data String to escape. + */ +export const escape: typeof encodeXML = encodeXML; + +/** + * Creates a function that escapes all characters matched by the given regular + * expression using the given map of characters to escape to their entities. + * + * @param regex Regular expression to match characters to escape. + * @param map Map of characters to escape to their entities. + * + * @returns Function that escapes all characters matched by the given regular + * expression using the given map of characters to escape to their entities. + */ +function getEscaper( + regex: RegExp, + map: Map, +): (data: string) => string { + return function escape(data: string): string { + let match; + let lastIndex = 0; + let result = ""; + + while ((match = regex.exec(data))) { + if (lastIndex !== match.index) { + result += data.substring(lastIndex, match.index); + } + + // We know that this character will be in the map. + result += map.get(match[0].charCodeAt(0))!; + + // Every match will be of length 1 + lastIndex = match.index + 1; + } + + return result + data.substring(lastIndex); + }; +} + +/** + * Encodes all characters not valid in XML documents using XML entities. + * + * Note that the output will be character-set dependent. + * + * @param data String to escape. + */ +export const escapeUTF8: (data: string) => string = /* #__PURE__ */ getEscaper( + /["&'<>]/g, + xmlCodeMap, +); + +/** + * Encodes all characters that have to be escaped in HTML attributes, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + * + * @param data String to escape. + */ +export const escapeAttribute: (data: string) => string = + /* #__PURE__ */ getEscaper( + /["&\u00A0]/g, + new Map([ + [34, """], + [38, "&"], + [160, " "], + ]), + ); + +/** + * Encodes all characters that have to be escaped in HTML text, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + * + * @param data String to escape. + */ +export const escapeText: (data: string) => string = /* #__PURE__ */ getEscaper( + /[&<>\u00A0]/g, + new Map([ + [38, "&"], + [60, "<"], + [62, ">"], + [160, " "], + ]), +); diff --git a/node_modules/webdav/node_modules/entities/src/generated/.eslintrc.json b/node_modules/webdav/node_modules/entities/src/generated/.eslintrc.json new file mode 100644 index 00000000..141a1c57 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/src/generated/.eslintrc.json @@ -0,0 +1,10 @@ +{ + "rules": { + "multiline-comment-style": 0, + "capitalized-comments": 0, + "unicorn/escape-case": 0, + "unicorn/no-hex-escape": 0, + "unicorn/numeric-separators-style": 0, + "unicorn/prefer-spread": 0 + } +} diff --git a/node_modules/webdav/node_modules/entities/src/generated/decode-data-html.ts b/node_modules/webdav/node_modules/entities/src/generated/decode-data-html.ts new file mode 100644 index 00000000..5c1d6c7c --- /dev/null +++ b/node_modules/webdav/node_modules/entities/src/generated/decode-data-html.ts @@ -0,0 +1,8 @@ +// Generated using scripts/write-decode-map.ts + +export const htmlDecodeTree: Uint16Array = /* #__PURE__ */ new Uint16Array( + // prettier-ignore + /* #__PURE__ */ 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+ .split("") + .map((c) => c.charCodeAt(0)), +); diff --git a/node_modules/webdav/node_modules/entities/src/generated/decode-data-xml.ts b/node_modules/webdav/node_modules/entities/src/generated/decode-data-xml.ts new file mode 100644 index 00000000..735cf7e1 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/src/generated/decode-data-xml.ts @@ -0,0 +1,8 @@ +// Generated using scripts/write-decode-map.ts + +export const xmlDecodeTree: Uint16Array = /* #__PURE__ */ new Uint16Array( + // prettier-ignore + /* #__PURE__ */ "\u0200aglq\t\x15\x18\x1b\u026d\x0f\0\0\x12p;\u4026os;\u4027t;\u403et;\u403cuot;\u4022" + .split("") + .map((c) => c.charCodeAt(0)), +); diff --git a/node_modules/webdav/node_modules/entities/src/generated/encode-html.ts b/node_modules/webdav/node_modules/entities/src/generated/encode-html.ts new file mode 100644 index 00000000..8f00fdc1 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/src/generated/encode-html.ts @@ -0,0 +1,17 @@ +// Generated using scripts/write-encode-map.ts + +type EncodeTrieNode = + | string + | { v?: string; n: number | Map; o?: string }; + +function restoreDiff>( + array: T, +): T { + for (let index = 1; index < array.length; index++) { + array[index][0] += array[index - 1][0] + 1; + } + return array; +} + +// prettier-ignore +export const htmlTrie: Map = /* #__PURE__ */ new Map(/* #__PURE__ */restoreDiff([[9," "],[0," 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diff --git a/node_modules/webdav/node_modules/entities/src/index.spec.ts b/node_modules/webdav/node_modules/entities/src/index.spec.ts new file mode 100644 index 00000000..7a8ec1a8 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/src/index.spec.ts @@ -0,0 +1,125 @@ +import { readFileSync } from "node:fs"; +import { describe, it, expect } from "vitest"; +import * as entities from "./index.js"; +import legacy from "../maps/legacy.json" assert { type: "json" }; + +const levels = ["xml", "entities"]; + +describe("Documents", () => { + const levelDocuments = levels + .map((name) => new URL(`../maps/${name}.json`, import.meta.url)) + .map((url) => JSON.parse(readFileSync(url, "utf8"))) + .map((document, index) => [index, document]); + + for (const [level, document] of levelDocuments) { + describe("Decode", () => { + it(levels[level], () => { + for (const entity of Object.keys(document)) { + for (let l = level; l < levels.length; l++) { + expect(entities.decode(`&${entity};`, l)).toBe( + document[entity], + ); + expect( + entities.decode(`&${entity};`, { level: l }), + ).toBe(document[entity]); + } + } + }); + }); + + describe("Decode strict", () => { + it(levels[level], () => { + for (const entity of Object.keys(document)) { + for (let l = level; l < levels.length; l++) { + expect(entities.decodeStrict(`&${entity};`, l)).toBe( + document[entity], + ); + expect( + entities.decode(`&${entity};`, { + level: l, + mode: entities.DecodingMode.Strict, + }), + ).toBe(document[entity]); + } + } + }); + }); + + describe("Encode", () => { + it(levels[level], () => { + for (const entity of Object.keys(document)) { + for (let l = level; l < levels.length; l++) { + const encoded = entities.encode(document[entity], l); + const decoded = entities.decode(encoded, l); + expect(decoded).toBe(document[entity]); + } + } + }); + + it("should only encode non-ASCII values if asked", () => + expect( + entities.encode("Great #'s of 🎁", { + level, + mode: entities.EncodingMode.ASCII, + }), + ).toBe("Great #'s of 🎁")); + }); + } + + describe("Legacy", () => { + const legacyMap: Record = legacy; + it("should decode", () => { + for (const entity of Object.keys(legacyMap)) { + expect(entities.decodeHTML(`&${entity}`)).toBe( + legacyMap[entity], + ); + expect( + entities.decodeStrict(`&${entity}`, { + level: entities.EntityLevel.HTML, + mode: entities.DecodingMode.Legacy, + }), + ).toBe(legacyMap[entity]); + } + }); + }); +}); + +const astral = [ + ["1d306", "\uD834\uDF06"], + ["1d11e", "\uD834\uDD1E"], +]; + +const astralSpecial = [ + ["80", "\u20AC"], + ["110000", "\uFFFD"], +]; + +describe("Astral entities", () => { + for (const [c, value] of astral) { + it(`should decode ${value}`, () => + expect(entities.decode(`&#x${c};`)).toBe(value)); + + it(`should encode ${value}`, () => + expect(entities.encode(value)).toBe(`&#x${c};`)); + + it(`should escape ${value}`, () => + expect(entities.escape(value)).toBe(`&#x${c};`)); + } + + for (const [c, value] of astralSpecial) { + it(`should decode special \\u${c}`, () => + expect(entities.decode(`&#x${c};`)).toBe(value)); + } +}); + +describe("Escape", () => { + it("should always decode ASCII chars", () => { + for (let index = 0; index < 0x7f; index++) { + const c = String.fromCharCode(index); + expect(entities.decodeXML(entities.escape(c))).toBe(c); + } + }); + + it("should keep UTF8 characters", () => + expect(entities.escapeUTF8('ß < "ü"')).toBe(`ß < "ü"`)); +}); diff --git a/node_modules/webdav/node_modules/entities/src/index.ts b/node_modules/webdav/node_modules/entities/src/index.ts new file mode 100644 index 00000000..64405629 --- /dev/null +++ b/node_modules/webdav/node_modules/entities/src/index.ts @@ -0,0 +1,188 @@ +import { decodeXML, decodeHTML, DecodingMode } from "./decode.js"; +import { encodeHTML, encodeNonAsciiHTML } from "./encode.js"; +import { + encodeXML, + escapeUTF8, + escapeAttribute, + escapeText, +} from "./escape.js"; + +/** The level of entities to support. */ +export enum EntityLevel { + /** Support only XML entities. */ + XML = 0, + /** Support HTML entities, which are a superset of XML entities. */ + HTML = 1, +} + +export enum EncodingMode { + /** + * The output is UTF-8 encoded. Only characters that need escaping within + * XML will be escaped. + */ + UTF8, + /** + * The output consists only of ASCII characters. Characters that need + * escaping within HTML, and characters that aren't ASCII characters will + * be escaped. + */ + ASCII, + /** + * Encode all characters that have an equivalent entity, as well as all + * characters that are not ASCII characters. + */ + Extensive, + /** + * Encode all characters that have to be escaped in HTML attributes, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + */ + Attribute, + /** + * Encode all characters that have to be escaped in HTML text, + * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}. + */ + Text, +} + +export interface DecodingOptions { + /** + * The level of entities to support. + * @default {@link EntityLevel.XML} + */ + level?: EntityLevel; + /** + * Decoding mode. If `Legacy`, will support legacy entities not terminated + * with a semicolon (`;`). + * + * Always `Strict` for XML. For HTML, set this to `true` if you are parsing + * an attribute value. + * + * The deprecated `decodeStrict` function defaults this to `Strict`. + * + * @default {@link DecodingMode.Legacy} + */ + mode?: DecodingMode | undefined; +} + +/** + * Decodes a string with entities. + * + * @param input String to decode. + * @param options Decoding options. + */ +export function decode( + input: string, + options: DecodingOptions | EntityLevel = EntityLevel.XML, +): string { + const level = typeof options === "number" ? options : options.level; + + if (level === EntityLevel.HTML) { + const mode = typeof options === "object" ? options.mode : undefined; + return decodeHTML(input, mode); + } + + return decodeXML(input); +} + +/** + * Decodes a string with entities. Does not allow missing trailing semicolons for entities. + * + * @param input String to decode. + * @param options Decoding options. + * @deprecated Use `decode` with the `mode` set to `Strict`. + */ +export function decodeStrict( + input: string, + options: DecodingOptions | EntityLevel = EntityLevel.XML, +): string { + const normalizedOptions = + typeof options === "number" ? { level: options } : options; + normalizedOptions.mode ??= DecodingMode.Strict; + + return decode(input, normalizedOptions); +} + +/** + * Options for `encode`. + */ +export interface EncodingOptions { + /** + * The level of entities to support. + * @default {@link EntityLevel.XML} + */ + level?: EntityLevel; + /** + * Output format. + * @default {@link EncodingMode.Extensive} + */ + mode?: EncodingMode; +} + +/** + * Encodes a string with entities. + * + * @param input String to encode. + * @param options Encoding options. + */ +export function encode( + input: string, + options: EncodingOptions | EntityLevel = EntityLevel.XML, +): string { + const { mode = EncodingMode.Extensive, level = EntityLevel.XML } = + typeof options === "number" ? { level: options } : options; + + switch (mode) { + case EncodingMode.UTF8: { + return escapeUTF8(input); + } + case EncodingMode.Attribute: { + return escapeAttribute(input); + } + case EncodingMode.Text: { + return escapeText(input); + } + case EncodingMode.ASCII: { + return level === EntityLevel.HTML + ? encodeNonAsciiHTML(input) + : encodeXML(input); + } + // eslint-disable-next-line unicorn/no-useless-switch-case + case EncodingMode.Extensive: + default: { + return level === EntityLevel.HTML + ? encodeHTML(input) + : encodeXML(input); + } + } +} + +export { + encodeXML, + escape, + escapeUTF8, + escapeAttribute, + escapeText, +} from "./escape.js"; + +export { + encodeHTML, + encodeNonAsciiHTML, + // Legacy aliases (deprecated) + encodeHTML as encodeHTML4, + encodeHTML as encodeHTML5, +} from "./encode.js"; + +export { + EntityDecoder, + DecodingMode, + decodeXML, + decodeHTML, + decodeHTMLStrict, + decodeHTMLAttribute, + // Legacy aliases (deprecated) + decodeHTML as decodeHTML4, + decodeHTML as decodeHTML5, + decodeHTMLStrict as decodeHTML4Strict, + decodeHTMLStrict as decodeHTML5Strict, + decodeXML as decodeXMLStrict, +} from "./decode.js"; diff --git a/node_modules/webdav/package.json b/node_modules/webdav/package.json new file mode 100644 index 00000000..2548cec6 --- /dev/null +++ b/node_modules/webdav/package.json @@ -0,0 +1,132 @@ +{ + "name": "webdav", + "version": "5.8.0", + "description": "WebDAV client for NodeJS", + "exports": { + ".": { + "browser": "./dist/web/index.js", + "react-native": "./dist/react-native/index.js", + "types": "./dist/node/index.d.ts", + "default": "./dist/node/index.js" + }, + "./react-native": "./dist/react-native/index.js", + "./web": "./dist/web/index.js", + "./dist/*": "./dist/*" + }, + "react-native": "./dist/react-native/index.js", + "type": "module", + "types": "./dist/node/index.d.ts", + "scripts": { + "build": "npm run clean && run-p build:node build:web", + "build:node": "tsc", + "build:web": "webpack --mode production --config webpack.config.cjs", + "clean": "rimraf dist web", + "dev": "nodemon -e ts,js --exec 'npm run build' --ignore 'dist/' --ignore 'web/'", + "format": "prettier --write '{source,test}/**/*.{js,ts}'", + "prepublishOnly": "npm run build", + "test": "run-s test:node test:web test:format", + "test:format": "prettier --check '{source,test}/**/*.{js,ts}'", + "test:node": "c8 --check-coverage --lines 89 --functions 91 --branches 77 --statements 89 mocha --config .mocharc.json", + "test:node:watch": "nodemon --exec 'npm run test:node' --ignore 'dist/'", + "test:web": "echo 'Currently disabled...'", + "xtest:web": "concurrently --success 'first' --kill-others 'npm run test:web:karma' 'npm run test:web:server'", + "xtest:web:karma": "karma start test/karma.conf.cjs", + "xtest:web:server": "node --loader ts-node/esm ./test/server.web.ts" + }, + "files": [ + "dist/", + "test/server/", + "*.md" + ], + "repository": { + "type": "git", + "url": "git+https://github.com/perry-mitchell/webdav-client.git" + }, + "keywords": [ + "webdav", + "client", + "remote", + "sync" + ], + "engines": { + "node": ">=14" + }, + "lint-staged": { + "{source,test}/**/*.{js,ts}": [ + "prettier --write" + ] + }, + "husky": { + "hooks": { + "pre-commit": "lint-staged" + } + }, + "author": "Perry Mitchell ", + "license": "MIT", + "bugs": { + "url": "https://github.com/perry-mitchell/webdav-client/issues" + }, + "homepage": "https://github.com/perry-mitchell/webdav-client#readme", + "dependencies": { + "@buttercup/fetch": "^0.2.1", + "base-64": "^1.0.0", + "byte-length": "^1.0.2", + "entities": "^6.0.0", + "fast-xml-parser": "^4.5.1", + "hot-patcher": "^2.0.1", + "layerr": "^3.0.0", + "md5": "^2.3.0", + "minimatch": "^9.0.5", + "nested-property": "^4.0.0", + "node-fetch": "^3.3.2", + "path-posix": "^1.0.0", + "url-join": "^5.0.0", + "url-parse": "^1.5.10" + }, + "devDependencies": { + "@babel/core": "^7.26.8", + "@babel/preset-env": "^7.26.8", + "@babel/preset-typescript": "^7.26.0", + "@types/chai": "^4.3.20", + "@types/he": "^1.2.3", + "@types/mocha": "^10.0.10", + "@types/node": "^22.13.1", + "@types/sinon": "^17.0.3", + "@types/url-parse": "^1.4.11", + "babel-loader": "^9.2.1", + "babel-plugin-transform-async-to-promises": "^0.8.18", + "buffer-equals": "^2.0.0", + "c8": "^10.1.3", + "chai": "^4.5.0", + "concurrently": "^8.2.2", + "copy-dir": "^1.3.0", + "directory-exists": "^2.0.1", + "exists-file": "^3.0.2", + "husky": "^4.3.8", + "karma": "^6.4.4", + "karma-chai": "^0.1.0", + "karma-chrome-launcher": "^3.2.0", + "karma-firefox-launcher": "^2.1.3", + "karma-mocha": "^2.0.1", + "karma-sinon": "^1.0.5", + "karma-spec-reporter": "^0.0.36", + "karma-webpack": "^5.0.1", + "lint-staged": "^15.4.3", + "mkdirp": "^3.0.1", + "mocha": "^10.8.2", + "nock": "^13.5.6", + "nodemon": "^3.1.9", + "npm-run-all": "^4.1.5", + "prettier": "^3.4.2", + "resolve-typescript-plugin": "^2.0.1", + "rimraf": "^6.0.1", + "sinon": "^18.0.1", + "ts-node": "^10.9.2", + "typescript": "^5.7.3", + "wait-on": "^7.2.0", + "webdav-server": "^2.6.2", + "webpack": "^5.93.0", + "webpack-cli": "^5.1.4", + "webpack-merge": "^6.0.1" + } +} diff --git a/node_modules/webdav/test/server/credentials.ts b/node_modules/webdav/test/server/credentials.ts new file mode 100644 index 00000000..ee287df9 --- /dev/null +++ b/node_modules/webdav/test/server/credentials.ts @@ -0,0 +1,3 @@ +export const PASSWORD = "pa$$w0rd!"; +export const PORT = 9988; +export const USERNAME = "webdav-user"; diff --git a/node_modules/webdav/test/server/index.ts b/node_modules/webdav/test/server/index.ts new file mode 100644 index 00000000..018a3514 --- /dev/null +++ b/node_modules/webdav/test/server/index.ts @@ -0,0 +1,60 @@ +import path from "path"; +import { fileURLToPath } from "url"; +import { v2 as ws } from "webdav-server"; +import { PASSWORD, PORT, USERNAME } from "./credentials.js"; + +const dirname = path.dirname(fileURLToPath(import.meta.url)); + +export function createServer(dir: string, authType: "basic" | "digest") { + if (!dir) { + throw new Error("Expected target directory"); + } + const userManager = new ws.SimpleUserManager(); + const user = userManager.addUser(USERNAME, PASSWORD); + let auth; + switch (authType) { + case "digest": + auth = new ws.HTTPDigestAuthentication(userManager, "test"); + break; + case "basic": + /* falls-through */ + default: + auth = new ws.HTTPBasicAuthentication(userManager); + break; + } + const privilegeManager = new ws.SimplePathPrivilegeManager(); + privilegeManager.setRights(user, "/", ["all"]); + const server = new ws.WebDAVServer({ + port: PORT, + httpAuthentication: auth, + privilegeManager: privilegeManager, + maxRequestDepth: Infinity, + headers: { + "Access-Control-Allow-Origin": "*", + "Access-Control-Allow-Methods": + "HEAD, GET, PUT, PROPFIND, DELETE, OPTIONS, MKCOL, MOVE, COPY", + "Access-Control-Allow-Headers": + "Accept, Authorization, Content-Type, Content-Length, Depth" + } + }); + // console.log(`Created server on localhost with port: 9988, and authType: ${authType}`); + return { + start: function start() { + return new Promise(function (resolve) { + server.setFileSystem("/webdav/server", new ws.PhysicalFileSystem(dir), function () { + server.start(resolve); + }); + }); + }, + + stop: function stop() { + return new Promise(function (resolve) { + server.stop(resolve); + }); + } + }; +} + +export function createWebDAVServer(authType: "basic" | "digest" = "basic") { + return createServer(path.resolve(dirname, "../testContents"), authType); +} diff --git a/package-lock.json b/package-lock.json index acc72991..179ec9b2 100644 --- a/package-lock.json +++ b/package-lock.json @@ -84,7 +84,8 @@ "tailwindcss-animate": "^1.0.7", "vaul": "^0.9.6", "vcard-js": "^1.2.2", - "vcd-parser": "^1.0.1" + "vcd-parser": "^1.0.1", + "webdav": "^5.8.0" }, "devDependencies": { "@types/imapflow": "^1.0.20", @@ -135,6 +136,15 @@ "node": ">=6.9.0" } }, + "node_modules/@buttercup/fetch": { + "version": "0.2.1", + "resolved": "https://registry.npmjs.org/@buttercup/fetch/-/fetch-0.2.1.tgz", + "integrity": "sha512-sCgECOx8wiqY8NN1xN22BqqKzXYIG2AicNLlakOAI4f0WgyLVUbAigMf8CZhBtJxdudTcB1gD5lciqi44jwJvg==", + "license": "MIT", + "optionalDependencies": { + "node-fetch": "^3.3.0" + } + }, "node_modules/@csstools/color-helpers": { "version": "5.0.2", "resolved": "https://registry.npmjs.org/@csstools/color-helpers/-/color-helpers-5.0.2.tgz", @@ -3615,6 +3625,12 @@ "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz", "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==" }, + "node_modules/base-64": { + "version": "1.0.0", + "resolved": "https://registry.npmjs.org/base-64/-/base-64-1.0.0.tgz", + "integrity": "sha512-kwDPIFCGx0NZHog36dj+tHiwP4QMzsZ3AgMViUBKI0+V5n4U0ufTCUMhnQ04diaRI8EX/QcPfql7zlhZ7j4zgg==", + "license": "MIT" + }, "node_modules/base64-js": { "version": "1.5.1", "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz", @@ -3731,6 +3747,12 @@ "node": ">=10.16.0" } }, + "node_modules/byte-length": { + "version": "1.0.2", + "resolved": "https://registry.npmjs.org/byte-length/-/byte-length-1.0.2.tgz", + "integrity": "sha512-ovBpjmsgd/teRmgcPh23d4gJvxDoXtAzEL9xTfMU8Yc2kqCDb7L9jAG0XHl1nzuGl+h3ebCIF1i62UFyA9V/2Q==", + "license": "MIT" + }, "node_modules/camelcase-css": { "version": "2.0.1", "resolved": "https://registry.npmjs.org/camelcase-css/-/camelcase-css-2.0.1.tgz", @@ -3758,6 +3780,15 @@ } ] }, + "node_modules/charenc": { + "version": "0.0.2", + "resolved": "https://registry.npmjs.org/charenc/-/charenc-0.0.2.tgz", + "integrity": "sha512-yrLQ/yVUFXkzg7EDQsPieE/53+0RlaWTs+wBrvW36cyilJ2SaDWfl4Yj7MtLTXleV9uEKefbAGUPv2/iWSooRA==", + "license": "BSD-3-Clause", + "engines": { + "node": "*" + } + }, "node_modules/chokidar": { "version": "3.6.0", "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.6.0.tgz", @@ -3942,6 +3973,15 @@ "node": ">= 8" } }, + "node_modules/crypt": { + "version": "0.0.2", + "resolved": "https://registry.npmjs.org/crypt/-/crypt-0.0.2.tgz", + "integrity": "sha512-mCxBlsHFYh9C+HVpiEacem8FEBnMXgU9gy4zmNC+SXAZNB/1idgp/aulFJ4FgCi7GPEVbfyng092GqL2k2rmow==", + "license": "BSD-3-Clause", + "engines": { + "node": "*" + } + }, "node_modules/cssesc": { "version": "3.0.0", "resolved": "https://registry.npmjs.org/cssesc/-/cssesc-3.0.0.tgz", @@ -4081,6 +4121,15 @@ "node": ">=12" } }, + "node_modules/data-uri-to-buffer": { + "version": "4.0.1", + "resolved": "https://registry.npmjs.org/data-uri-to-buffer/-/data-uri-to-buffer-4.0.1.tgz", + "integrity": "sha512-0R9ikRb668HB7QDxT1vkpuUBtqc53YyAwMwGeUFKRojY/NWKvdZ+9UYtRfGmhqNbRkTSVpMbmyhXipFFv2cb/A==", + "license": "MIT", + "engines": { + "node": ">= 12" + } + }, "node_modules/data-urls": { "version": "5.0.0", "resolved": "https://registry.npmjs.org/data-urls/-/data-urls-5.0.0.tgz", @@ -4410,6 +4459,24 @@ "node": ">=6" } }, + "node_modules/fast-xml-parser": { + "version": "4.5.3", + "resolved": "https://registry.npmjs.org/fast-xml-parser/-/fast-xml-parser-4.5.3.tgz", + "integrity": "sha512-RKihhV+SHsIUGXObeVy9AXiBbFwkVk7Syp8XgwN5U3JV416+Gwp/GO9i0JYKmikykgz/UHRrrV4ROuZEo/T0ig==", + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/NaturalIntelligence" + } + ], + "license": "MIT", + "dependencies": { + "strnum": "^1.1.1" + }, + "bin": { + "fxparser": "src/cli/cli.js" + } + }, "node_modules/fastq": { "version": "1.18.0", "resolved": "https://registry.npmjs.org/fastq/-/fastq-1.18.0.tgz", @@ -4418,6 +4485,29 @@ "reusify": "^1.0.4" } }, + "node_modules/fetch-blob": { + "version": "3.2.0", + "resolved": "https://registry.npmjs.org/fetch-blob/-/fetch-blob-3.2.0.tgz", + "integrity": "sha512-7yAQpD2UMJzLi1Dqv7qFYnPbaPx7ZfFK6PiIxQ4PfkGPyNyl2Ugx+a/umUonmKqjhM4DnfbMvdX6otXq83soQQ==", + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/jimmywarting" + }, + { + "type": "paypal", + "url": "https://paypal.me/jimmywarting" + } + ], + "license": "MIT", + "dependencies": { + "node-domexception": "^1.0.0", + "web-streams-polyfill": "^3.0.3" + }, + "engines": { + "node": "^12.20 || >= 14.13" + } + }, "node_modules/fill-range": { "version": "7.1.1", "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.1.1.tgz", @@ -4444,6 +4534,18 @@ "url": "https://github.com/sponsors/isaacs" } }, + "node_modules/formdata-polyfill": { + "version": "4.0.10", + "resolved": "https://registry.npmjs.org/formdata-polyfill/-/formdata-polyfill-4.0.10.tgz", + "integrity": "sha512-buewHzMvYL29jdeQTVILecSaZKnt/RJWjoZCF5OW60Z67/GmSLBkOFM7qh1PI3zFNtJbaZL5eQu1vLfazOwj4g==", + "license": "MIT", + "dependencies": { + "fetch-blob": "^3.1.2" + }, + "engines": { + "node": ">=12.20.0" + } + }, "node_modules/fraction.js": { "version": "4.3.7", "resolved": "https://registry.npmjs.org/fraction.js/-/fraction.js-4.3.7.tgz", @@ -4549,6 +4651,12 @@ "he": "bin/he" } }, + "node_modules/hot-patcher": { + "version": "2.0.1", + "resolved": "https://registry.npmjs.org/hot-patcher/-/hot-patcher-2.0.1.tgz", + "integrity": "sha512-ECg1JFG0YzehicQaogenlcs2qg6WsXQsxtnbr1i696u5tLUjtJdQAh0u2g0Q5YV45f263Ta1GnUJsc8WIfJf4Q==", + "license": "MIT" + }, "node_modules/html-encoding-sniffer": { "version": "4.0.0", "resolved": "https://registry.npmjs.org/html-encoding-sniffer/-/html-encoding-sniffer-4.0.0.tgz", @@ -4757,6 +4865,12 @@ "node": ">=8" } }, + "node_modules/is-buffer": { + "version": "1.1.6", + "resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-1.1.6.tgz", + "integrity": "sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w==", + "license": "MIT" + }, "node_modules/is-core-module": { "version": "2.16.1", "resolved": "https://registry.npmjs.org/is-core-module/-/is-core-module-2.16.1.tgz", @@ -4926,6 +5040,12 @@ "node": ">=18" } }, + "node_modules/layerr": { + "version": "3.0.0", + "resolved": "https://registry.npmjs.org/layerr/-/layerr-3.0.0.tgz", + "integrity": "sha512-tv754Ki2dXpPVApOrjTyRo4/QegVb9eVFq4mjqp4+NM5NaX7syQvN5BBNfV/ZpAHCEHV24XdUVrBAoka4jt3pA==", + "license": "MIT" + }, "node_modules/leac": { "version": "0.6.0", "resolved": "https://registry.npmjs.org/leac/-/leac-0.6.0.tgz", @@ -5058,6 +5178,17 @@ "libqp": "2.1.1" } }, + "node_modules/md5": { + "version": "2.3.0", + "resolved": "https://registry.npmjs.org/md5/-/md5-2.3.0.tgz", + "integrity": "sha512-T1GITYmFaKuO91vxyoQMFETst+O71VUPEU3ze5GNzDm0OWdP8v1ziTaAEPUr/3kLsY3Sftgz242A1SetQiDL7g==", + "license": "BSD-3-Clause", + "dependencies": { + "charenc": "0.0.2", + "crypt": "0.0.2", + "is-buffer": "~1.1.6" + } + }, "node_modules/merge2": { "version": "1.4.1", "resolved": "https://registry.npmjs.org/merge2/-/merge2-1.4.1.tgz", @@ -5154,6 +5285,12 @@ "node": "^10 || ^12 || ^13.7 || ^14 || >=15.0.1" } }, + "node_modules/nested-property": { + "version": "4.0.0", + "resolved": "https://registry.npmjs.org/nested-property/-/nested-property-4.0.0.tgz", + "integrity": "sha512-yFehXNWRs4cM0+dz7QxCd06hTbWbSkV0ISsqBfkntU6TOY4Qm3Q88fRRLOddkGh2Qq6dZvnKVAahfhjcUvLnyA==", + "license": "MIT" + }, "node_modules/next": { "version": "15.3.1", "resolved": "https://registry.npmjs.org/next/-/next-15.3.1.tgz", @@ -5276,6 +5413,44 @@ "node": "^10 || ^12 || >=14" } }, + "node_modules/node-domexception": { + "version": "1.0.0", + "resolved": "https://registry.npmjs.org/node-domexception/-/node-domexception-1.0.0.tgz", + "integrity": "sha512-/jKZoMpw0F8GRwl4/eLROPA3cfcXtLApP0QzLmUT/HuPCZWyB7IY9ZrMeKw2O/nFIqPQB3PVM9aYm0F312AXDQ==", + "deprecated": "Use your platform's native DOMException instead", + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/jimmywarting" + }, + { + "type": "github", + "url": "https://paypal.me/jimmywarting" + } + ], + "license": "MIT", + "engines": { + "node": ">=10.5.0" + } + }, + "node_modules/node-fetch": { + "version": "3.3.2", + "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-3.3.2.tgz", + "integrity": "sha512-dRB78srN/l6gqWulah9SrxeYnxeddIG30+GOqK/9OlLVyLg3HPnr6SqOWTWOXKRwC2eGYCkZ59NNuSgvSrpgOA==", + "license": "MIT", + "dependencies": { + "data-uri-to-buffer": "^4.0.0", + "fetch-blob": "^3.1.4", + "formdata-polyfill": "^4.0.10" + }, + "engines": { + "node": "^12.20.0 || ^14.13.1 || >=16.0.0" + }, + "funding": { + "type": "opencollective", + "url": "https://opencollective.com/node-fetch" + } + }, "node_modules/node-gettext": { "version": "3.0.0", "resolved": "https://registry.npmjs.org/node-gettext/-/node-gettext-3.0.0.tgz", @@ -5445,6 +5620,12 @@ "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.7.tgz", "integrity": "sha512-LDJzPVEEEPR+y48z93A0Ed0yXb8pAByGWo/k5YYdYgpY2/2EsOsksJrq7lOHxryrVOn1ejG6oAp8ahvOIQD8sw==" }, 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