How to use AcquireWritableStreamDefaultWriter method in wpt

Best JavaScript code snippet using wpt

pipe.ts

Source:pipe.ts

1import { IsReadableStream, IsReadableStreamLocked, ReadableStream, ReadableStreamCancel } from '../readable-stream';2import { AcquireReadableStreamDefaultReader, ReadableStreamDefaultReaderRead } from './default-reader';3import { ReadableStreamReaderGenericRelease } from './generic-reader';4import {5  AcquireWritableStreamDefaultWriter,6  IsWritableStream,7  IsWritableStreamLocked,8  WritableStream,9  WritableStreamAbort,10  WritableStreamCloseQueuedOrInFlight,11  WritableStreamDefaultWriterCloseWithErrorPropagation,12  WritableStreamDefaultWriterRelease,13  WritableStreamDefaultWriterWrite14} from '../writable-stream';15import assert from '../../stub/assert';16import {17  newPromise,18  PerformPromiseThen,19  promiseResolvedWith,20  setPromiseIsHandledToTrue,21  uponFulfillment,22  uponPromise,23  uponRejection24} from '../helpers/webidl';25import { noop } from '../../utils';26import { AbortSignal, isAbortSignal } from '../abort-signal';27import { DOMException } from '../../stub/dom-exception';28export function ReadableStreamPipeTo<T>(source: ReadableStream<T>,29                                        dest: WritableStream<T>,30                                        preventClose: boolean,31                                        preventAbort: boolean,32                                        preventCancel: boolean,33                                        signal: AbortSignal | undefined): Promise<void> {34  assert(IsReadableStream(source));35  assert(IsWritableStream(dest));36  assert(typeof preventClose === 'boolean');37  assert(typeof preventAbort === 'boolean');38  assert(typeof preventCancel === 'boolean');39  assert(signal === undefined || isAbortSignal(signal));40  assert(!IsReadableStreamLocked(source));41  assert(!IsWritableStreamLocked(dest));42  const reader = AcquireReadableStreamDefaultReader<T>(source);43  const writer = AcquireWritableStreamDefaultWriter<T>(dest);44  source._disturbed = true;45  let shuttingDown = false;46  // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.47  let currentWrite = promiseResolvedWith<void>(undefined);48  return newPromise((resolve, reject) => {49    let abortAlgorithm: () => void;50    if (signal !== undefined) {51      abortAlgorithm = () => {52        const error = new DOMException('Aborted', 'AbortError');53        const actions: Array<() => Promise<void>> = [];54        if (!preventAbort) {55          actions.push(() => {56            if (dest._state === 'writable') {57              return WritableStreamAbort(dest, error);58            }59            return promiseResolvedWith(undefined);60          });61        }62        if (!preventCancel) {63          actions.push(() => {64            if (source._state === 'readable') {65              return ReadableStreamCancel(source, error);66            }67            return promiseResolvedWith(undefined);68          });69        }70        shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);71      };72      if (signal.aborted) {73        abortAlgorithm();74        return;75      }76      signal.addEventListener('abort', abortAlgorithm);77    }78    // Using reader and writer, read all chunks from this and write them to dest79    // - Backpressure must be enforced80    // - Shutdown must stop all activity81    function pipeLoop() {82      return newPromise<void>((resolveLoop, rejectLoop) => {83        function next(done: boolean) {84          if (done) {85            resolveLoop();86          } else {87            // Use `PerformPromiseThen` instead of `uponPromise` to avoid88            // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers89            PerformPromiseThen(pipeStep(), next, rejectLoop);90          }91        }92        next(false);93      });94    }95    function pipeStep(): Promise<boolean> {96      if (shuttingDown) {97        return promiseResolvedWith(true);98      }99      return PerformPromiseThen(writer._readyPromise, () => {100        return newPromise<boolean>((resolveRead, rejectRead) => {101          ReadableStreamDefaultReaderRead(102            reader,103            {104              _chunkSteps: chunk => {105                currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);106                resolveRead(false);107              },108              _closeSteps: () => resolveRead(true),109              _errorSteps: rejectRead110            }111          );112        });113      });114    }115    // Errors must be propagated forward116    isOrBecomesErrored(source, reader._closedPromise, storedError => {117      if (!preventAbort) {118        shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);119      } else {120        shutdown(true, storedError);121      }122    });123    // Errors must be propagated backward124    isOrBecomesErrored(dest, writer._closedPromise, storedError => {125      if (!preventCancel) {126        shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);127      } else {128        shutdown(true, storedError);129      }130    });131    // Closing must be propagated forward132    isOrBecomesClosed(source, reader._closedPromise, () => {133      if (!preventClose) {134        shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));135      } else {136        shutdown();137      }138    });139    // Closing must be propagated backward140    if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {141      const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');142      if (!preventCancel) {143        shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);144      } else {145        shutdown(true, destClosed);146      }147    }148    setPromiseIsHandledToTrue(pipeLoop());149    function waitForWritesToFinish(): Promise<void> {150      // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait151      // for that too.152      const oldCurrentWrite = currentWrite;153      return PerformPromiseThen(154        currentWrite,155        () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined156      );157    }158    function isOrBecomesErrored(stream: ReadableStream | WritableStream,159                                promise: Promise<void>,160                                action: (reason: any) => void) {161      if (stream._state === 'errored') {162        action(stream._storedError);163      } else {164        uponRejection(promise, action);165      }166    }167    function isOrBecomesClosed(stream: ReadableStream | WritableStream, promise: Promise<void>, action: () => void) {168      if (stream._state === 'closed') {169        action();170      } else {171        uponFulfillment(promise, action);172      }173    }174    function shutdownWithAction(action: () => Promise<unknown>, originalIsError?: boolean, originalError?: any) {175      if (shuttingDown) {176        return;177      }178      shuttingDown = true;179      if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {180        uponFulfillment(waitForWritesToFinish(), doTheRest);181      } else {182        doTheRest();183      }184      function doTheRest() {185        uponPromise(186          action(),187          () => finalize(originalIsError, originalError),188          newError => finalize(true, newError)189        );190      }191    }192    function shutdown(isError?: boolean, error?: any) {193      if (shuttingDown) {194        return;195      }196      shuttingDown = true;197      if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {198        uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));199      } else {200        finalize(isError, error);201      }202    }203    function finalize(isError?: boolean, error?: any) {204      WritableStreamDefaultWriterRelease(writer);205      ReadableStreamReaderGenericRelease(reader);206      if (signal !== undefined) {207        signal.removeEventListener('abort', abortAlgorithm);208      }209      if (isError) {210        reject(error);211      } else {212        resolve(undefined);213      }214    }215  });...

writable_stream.ts

Source:writable_stream.ts

1// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.2import {3  AbortRequest,4  acquireWritableStreamDefaultWriter,5  Deferred,6  initializeWritableStream,7  isWritableStream,8  isWritableStreamLocked,9  makeSizeAlgorithmFromSizeFunction,10  setFunctionName,11  setUpWritableStreamDefaultControllerFromUnderlyingSink,12  writableStreamAbort,13  writableStreamClose,14  writableStreamCloseQueuedOrInFlight,15  validateAndNormalizeHighWaterMark,16} from "./internals.ts";17import * as sym from "./symbols.ts";18import { WritableStreamDefaultControllerImpl } from "./writable_stream_default_controller.ts";19import { WritableStreamDefaultWriterImpl } from "./writable_stream_default_writer.ts";20import { customInspect } from "../console.ts";21// eslint-disable-next-line @typescript-eslint/no-explicit-any22export class WritableStreamImpl<W = any> implements WritableStream<W> {23  [sym.backpressure]: boolean;24  [sym.closeRequest]?: Deferred<void>;25  [sym.inFlightWriteRequest]?: Required<Deferred<void>>;26  [sym.inFlightCloseRequest]?: Deferred<void>;27  [sym.pendingAbortRequest]?: AbortRequest;28  [sym.state]: "writable" | "closed" | "erroring" | "errored";29  // eslint-disable-next-line @typescript-eslint/no-explicit-any30  [sym.storedError]?: any;31  [sym.writableStreamController]?: WritableStreamDefaultControllerImpl<W>;32  [sym.writer]?: WritableStreamDefaultWriterImpl<W>;33  [sym.writeRequests]: Array<Required<Deferred<void>>>;34  constructor(35    underlyingSink: UnderlyingSink = {},36    strategy: QueuingStrategy = {}37  ) {38    initializeWritableStream(this);39    const size = strategy.size;40    let highWaterMark = strategy.highWaterMark ?? 1;41    const { type } = underlyingSink;42    if (type !== undefined) {43      throw new RangeError(`Sink type of "${String(type)}" not supported.`);44    }45    const sizeAlgorithm = makeSizeAlgorithmFromSizeFunction(size);46    highWaterMark = validateAndNormalizeHighWaterMark(highWaterMark);47    setUpWritableStreamDefaultControllerFromUnderlyingSink(48      this,49      underlyingSink,50      highWaterMark,51      sizeAlgorithm52    );53  }54  get locked(): boolean {55    if (!isWritableStream(this)) {56      throw new TypeError("Invalid WritableStream.");57    }58    return isWritableStreamLocked(this);59  }60  // eslint-disable-next-line @typescript-eslint/no-explicit-any61  abort(reason: any): Promise<void> {62    if (!isWritableStream(this)) {63      return Promise.reject(new TypeError("Invalid WritableStream."));64    }65    if (isWritableStreamLocked(this)) {66      return Promise.reject(67        new TypeError("Cannot abort a locked WritableStream.")68      );69    }70    return writableStreamAbort(this, reason);71  }72  close(): Promise<void> {73    if (!isWritableStream(this)) {74      return Promise.reject(new TypeError("Invalid WritableStream."));75    }76    if (isWritableStreamLocked(this)) {77      return Promise.reject(78        new TypeError("Cannot abort a locked WritableStream.")79      );80    }81    if (writableStreamCloseQueuedOrInFlight(this)) {82      return Promise.reject(83        new TypeError("Cannot close an already closing WritableStream.")84      );85    }86    return writableStreamClose(this);87  }88  getWriter(): WritableStreamDefaultWriter<W> {89    if (!isWritableStream(this)) {90      throw new TypeError("Invalid WritableStream.");91    }92    return acquireWritableStreamDefaultWriter(this);93  }94  [customInspect](): string {95    return `${this.constructor.name} { locked: ${String(this.locked)} }`;96  }97}...

Using AI Code Generation

1var rs = new ReadableStream({2  start(controller) {3    controller.enqueue('a');4    controller.enqueue('b');5    controller.close();6  }7});8var writer = rs.getWritableStreamDefaultWriter();9writer.releaseLock();10var rs = new ReadableStream({11  start(controller) {12    controller.enqueue('a');13    controller.enqueue('b');14    controller.close();15  }16});17var writer = rs.getWritableStreamDefaultWriter();18writer.releaseLock();19var rs = new ReadableStream({20  start(controller) {21    controller.enqueue('a');22    controller.enqueue('b');23    controller.close();24  }25});26var writer = rs.getWritableStreamDefaultWriter();27writer.releaseLock();28var rs = new ReadableStream({29  start(controller) {30    controller.enqueue('a');31    controller.enqueue('b');32    controller.close();33  }34});35var writer = rs.getWritableStreamDefaultWriter();36writer.releaseLock();37var rs = new ReadableStream({38  start(controller) {39    controller.enqueue('a');40    controller.enqueue('b');41    controller.close();42  }43});44var writer = rs.getWritableStreamDefaultWriter();45writer.releaseLock();

Using AI Code Generation

1import { AcquireWritableStreamDefaultWriter } from 'streams/writable-streams/default-writer.js';2export const writableStream = new WritableStream({3  write() {}4});5export const writer = AcquireWritableStreamDefaultWriter(writableStream);6### Constructor: new WritableStream(underlyingSink=, { size, highWaterMark }=)7* `underlyingSink` — An object representing the underlying sink with methods and properties that define how the constructed stream instance will behave. The following methods are the bare-minimum required: `start(controller)`, `write(chunk, controller)`. It can also contain the following optional methods: `abort(reason)`, `close(controller)`. If a `type` property is provided, it should be set to `"bytes"`. The `controller` parameter passed to some of the following methods is a8### writable.abort(reason)9### writable.close()

Using AI Code Generation

1'use strict';2const { WritableStream } = require('stream/web');3const { AcquireWritableStreamDefaultWriter } = WritableStream;4const w = new WritableStream({5  write(chunk) {6    console.log(chunk);7  }8});9const writer = AcquireWritableStreamDefaultWriter(w);10'use strict';11const { WritableStream } = require('stream/web');12const { AcquireWritableStreamDefaultWriter } = WritableStream;13const w = new WritableStream({14  write(chunk) {15    console.log(chunk);16  }17});18const writer = AcquireWritableStreamDefaultWriter(w);19'use strict';20const { WritableStream } = require('stream/web');21const { AcquireWritableStreamDefaultWriter, WritableStreamDefaultWriterGetDesiredSize } = WritableStream;22const w = new WritableStream({23  write(chunk) {24    console.log(chunk);25  }26});27const writer = AcquireWritableStreamDefaultWriter(w);28console.log(WritableStreamDefaultWriterGetDesiredSize(writer));29'use strict';30const { WritableStream } = require('stream/web');31const { AcquireWritableStreamDefaultWriter, WritableStreamDefaultWriterClose, WritableStreamDefaultWriterReleaseLock } = WritableStream;32const w = new WritableStream({33  write(chunk) {34    console.log(chunk);35  }36});37const writer = AcquireWritableStreamDefaultWriter(w);38WritableStreamDefaultWriterClose(writer).then(() => {39  console.log('closed');40  WritableStreamDefaultWriterReleaseLock(writer);41});42'use strict';43const { WritableStream } = require('stream/web');44const { AcquireWritableStreamDefaultWriter, WritableStreamDefaultWriterReleaseLock } = WritableStream;45const w = new WritableStream({46  write(chunk) {47    console.log(chunk);48  }49});50const writer = AcquireWritableStreamDefaultWriter(w);51WritableStreamDefaultWriterReleaseLock(writer);52'use strict';53const { WritableStream } = require('stream/web');54const { AcquireWritableStreamDefaultWriter, Writable

Using AI Code Generation

1var readableStream = new ReadableStream({2  start(controller) {3    controller.enqueue('a');4    controller.enqueue('b');5    controller.enqueue('c');6  }7});8var writer = readableStream.getReader();9var firstRead = writer.read();10var secondRead = writer.read();11var thirdRead = writer.read();12firstRead.then(result => {13});14secondRead.then(result => {15});16thirdRead.then(result => {17});

Using AI Code Generation

1const {WritableStream, WritableStreamDefaultWriter, AcquireWritableStreamDefaultWriter} = require('stream/web');2const {isWritableStream, isWritableStreamDefaultWriter, isWritableStreamLocked} = require('stream/web');3const writer = AcquireWritableStreamDefaultWriter(new WritableStream());4const {WritableStream, WritableStreamDefaultWriter, AcquireWritableStreamDefaultWriter} = require('stream/web');5const {isWritableStream, isWritableStreamDefaultWriter, isWritableStreamLocked} = require('stream/web');6const writer = AcquireWritableStreamDefaultWriter(new WritableStream());7const {WritableStream, WritableStreamDefaultWriter, AcquireWritableStreamDefaultWriter} = require('stream/web');8const {isWritableStream, isWritableStreamDefaultWriter, isWritableStreamLocked} = require('stream/web');9const writer = AcquireWritableStreamDefaultWriter(new WritableStream());10const {11} = primordials;12const {13  codes: {14  },15} = require('internal/errors');16const { Buffer } = require('buffer');17const { isArrayBufferView } = require('internal/util/types');18const { isUint8Array } = require('internal/util/types');19const { MathFloor, MathMax } = primordials;20const { getOptionValue } = require('internal/options');21const {22} = require('internal/util');23const { validateAbortSignal } = require('internal/validators');24const {25} = require('internal/util');26const {

Using AI Code Generation

1var writer = AcquireWritableStreamDefaultWriter(stream);2assert_throws(new TypeError(), function() {3  AcquireWritableStreamDefaultWriter(stream);4}, 'AcquireWritableStreamDefaultWriter should throw a TypeError when stream is not a WritableStream');5var writer = AcquireWritableStreamDefaultWriter(stream);6assert_equals(writer.constructor.name, "WritableStreamDefaultWriter", "AcquireWritableStreamDefaultWriter should return a WritableStreamDefaultWriter object");7var writer = AcquireWritableStreamDefaultWriter(stream);8assert_equals(writer.stream, stream, "AcquireWritableStreamDefaultWriter should return a WritableStreamDefaultWriter object whose stream property is the stream argument");9var writer = AcquireWritableStreamDefaultWriter(stream);10assert_equals(writer.closed, stream.closed, "AcquireWritableStreamDefaultWriter should return a WritableStreamDefaultWriter object whose closed promise property is the closed promise of the stream argument");11var writer = AcquireWritableStreamDefaultWriter(stream);12assert_equals(writer.ready, stream.ready, "AcquireWritableStreamDefaultWriter should return a WritableStreamDefaultWriter object whose ready promise property is the ready promise of the stream argument");13var writer = AcquireWritableStreamDefaultWriter(stream);14assert_equals(writer.desiredSize, stream.desiredSize, "AcquireWritableStreamDefaultWriter should return a WritableStreamDefaultWriter object whose desiredSize property is the desiredSize property of the stream argument");15var writer = AcquireWritableStreamDefaultWriter(stream);16assert_equals(writer.state, stream.state, "AcquireWritableStreamDefaultWriter should return a WritableStreamDefault

Using AI Code Generation

1var writer = stream.AcquireWritableStreamDefaultWriter();2writer.WriteWithLock("hello world");3const writer = stream.AcquireWritableStreamDefaultWriter();4writer.WriteWithLock(chunk);5writer.CloseWithLock();6writer.AbortWithLock(reason);7writer.ReleaseLock();8const reader = stream.AcquireReadableStreamDefaultReader();9const result = reader.ReadWithLock();10reader.CancelWithLock(reason);11reader.ReleaseLock();12const controller = stream.AcquireTransformStreamDefaultController();13controller.EnqueueWithLock(chunk);14controller.ErrorWithLock(error);15controller.TerminateWithLock();16controller.ReleaseLock();17const strategy = new ByteLengthQueuingStrategy({18});19const strategy = new CountQueuingStrategy({20});21const controller = stream.AcquireWritableStreamDefaultController();22controller.ErrorWithLock(error);23controller.TerminateWithLock();24controller.ReleaseLock();25const controller = stream.AcquireReadableStreamDefaultController();26controller.EnqueueWithLock(chunk);

Using AI Code Generation

1const file = new File(["foo"], "foo.txt", {type: "text/plain"});2const writer = file.stream().getWriter();3writer.write("bar");4writer.close();5`const reader = stream.AcquireReadableStreamDefaultReader();`6const file = new File(["foo"], "foo.txt", {type: "text/plain"});7const reader = file.stream().getReader();8reader.read().then(result => console.log(result));9`const reader = stream.AcquireReadableStreamBYOBReader();`10const file = new File(["foo"], "foo.txt", {type: "text/plain"});11const reader = file.stream().getReader({mode: "byob"});12const buffer = new ArrayBuffer(1);13reader.read(buffer).then(result => console.log(result));

Using AI Code Generation

1const writer = writable.getWriter();2writer.write("a");3writer.close();4writer.closed.then(() => console.log("closed!"));5### WritableStreamDefaultWriter.releaseLock()6const writer = writable.getWriter();7writer.releaseLock();8### WritableStreamDefaultWriter.write(chunk)9const writer = writable.getWriter();10const writePromise = writer.write("a");11writePromise.then(() => console.log("The first write completed."));12writer.write("b");13writer.write("c");14`const reader = stream.AcquireReadableStreamDefaultReader();`15const file = new File(["foo"], "foo.txt", {type: "text/plain"});16const reader = file.stream().getReader();17reader.read().then(result => console.log(result));18`const reader = stream.AcquireReadableStreamBYOBReader();`19const file = new File(["foo"], "foo.txt", {type: "text/plain"});20const reader = file.stream().getReader({mode: "byob"});21const buffer = new ArrayBuffer(1);22reader.read(buffer).then(result => console.log(result));

Using AI Code Generation

1const writer = writable.getWriter();2writer.write("a");3writer.close();4writer.closed.then(() => console.log("closed!"));5### WritableStreamDefaultWriter.releaseLock()6const writer = writable.getWriter();7writer.releaseLock();8### WritableStreamDefaultWriter.write(chunk)9const writer = writable.getWriter();10const writePromise = writer.write("a");11writePromise.then(() => console.log("The first write completed."));12writer.write("b");13writer.write("c");

Using AI Code Generation

1const writer = writable.getWriter();2writer.write("a");3writer.close();4writer.closed.then(() => console.log("closed!"));5### WritableStreamDefaultWriter.releaseLock()6const writer = writable.getWriter();7writer.releaseLock();8### WritableStreamDefaultWriter.write(chunk)9const writer = writable.getWriter();10const writePromise = writer.write("a");11writePromise.then(() => console.log("The first write completed."));12writer.write("b");13writer.write("c");14controller.ErrorWithLock(error);15controller.TerminateWithLock();16controller.ReleaseLock();17const controller = stream.AcquireReadableStreamDefaultController();18controller.EnqueueWithLock(chunk);

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