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How to use WritableStreamDefaultControllerGetChunkSize method in wpt

Best JavaScript code snippet using wpt

writablestream.js

Source:writablestream.js

1'use strict';2/* eslint-disable no-use-before-define */3const {4  ArrayPrototypePush,5  ArrayPrototypeShift,6  FunctionPrototypeBind,7  FunctionPrototypeCall,8  ObjectDefineProperties,9  PromisePrototypeThen,10  PromiseResolve,11  PromiseReject,12  ReflectConstruct,13  Symbol,14  SymbolToStringTag,15} = primordials;16const {17  codes: {18    ERR_ILLEGAL_CONSTRUCTOR,19    ERR_INVALID_ARG_VALUE,20    ERR_INVALID_ARG_TYPE,21    ERR_INVALID_STATE,22    ERR_INVALID_THIS,23  },24} = require('internal/errors');25const {26  DOMException,27} = internalBinding('messaging');28const {29  createDeferredPromise,30  customInspectSymbol: kInspect,31} = require('internal/util');32const {33  MessageChannel,34} = require('internal/worker/io');35const {36  kDeserialize,37  kTransfer,38  kTransferList,39  makeTransferable,40} = require('internal/worker/js_transferable');41const {42  customInspect,43  dequeueValue,44  ensureIsPromise,45  enqueueValueWithSize,46  extractHighWaterMark,47  extractSizeAlgorithm,48  lazyTransfer,49  isBrandCheck,50  isPromisePending,51  peekQueueValue,52  resetQueue,53  setPromiseHandled,54  nonOpCancel,55  nonOpStart,56  nonOpWrite,57  kType,58  kState,59  kEnumerableProperty,60} = require('internal/webstreams/util');61const {62  AbortController,63} = require('internal/abort_controller');64const assert = require('internal/assert');65const kAbort = Symbol('kAbort');66const kCloseSentinel = Symbol('kCloseSentinel');67const kError = Symbol('kError');68/**69 * @typedef {import('../abort_controller').AbortSignal} AbortSignal70 * @typedef {import('./queuingstrategies').QueuingStrategy71 * } QueuingStrategy72 * @typedef {import('./queuingstrategies').QueuingStrategySize73 * } QueuingStrategySize74 *75 * @callback UnderlyingSinkStartCallback76 * @param {WritableStreamDefaultController} controller77 *78 * @callback UnderlyingSinkWriteCallback79 * @param {any} chunk80 * @param {WritableStreamDefaultController} controller81 * @returns {Promise<void>}82 *83 * @callback UnderlyingSinkCloseCallback84 * @returns {Promise<void>}85 *86 * @callback UnderlyingSinkAbortCallback87 * @param {any} reason88 * @returns {Promise<void>}89 *90 * @typedef {{91 *   start? : UnderlyingSinkStartCallback,92 *   write? : UnderlyingSinkWriteCallback,93 *   close? : UnderlyingSinkCloseCallback,94 *   abort? : UnderlyingSinkAbortCallback,95 *   type? : any,96 * }} UnderlyingSink97 */98class WritableStream {99  [kType] = 'WritableStream';100  get [SymbolToStringTag]() { return this[kType]; }101  /**102   * @param {UnderlyingSink} [sink]103   * @param {QueuingStrategy} [strategy]104   */105  constructor(sink = null, strategy = {}) {106    const type = sink?.type;107    if (type !== undefined)108      throw new ERR_INVALID_ARG_VALUE.RangeError('type', type);109    this[kState] = {110      close: createDeferredPromise(),111      closeRequest: {112        promise: undefined,113        resolve: undefined,114        reject: undefined,115      },116      inFlightWriteRequest: {117        promise: undefined,118        resolve: undefined,119        reject: undefined,120      },121      inFlightCloseRequest: {122        promise: undefined,123        resolve: undefined,124        reject: undefined,125      },126      pendingAbortRequest: {127        abort: {128          promise: undefined,129          resolve: undefined,130          reject: undefined,131        },132        reason: undefined,133        wasAlreadyErroring: false,134      },135      backpressure: false,136      controller: undefined,137      state: 'writable',138      storedError: undefined,139      writeRequests: [],140      writer: undefined,141      transfer: {142        readable: undefined,143        port1: undefined,144        port2: undefined,145        promise: undefined,146      }147    };148    const size = extractSizeAlgorithm(strategy?.size);149    const highWaterMark = extractHighWaterMark(strategy?.highWaterMark, 1);150    setupWritableStreamDefaultControllerFromSink(151      this,152      sink,153      highWaterMark,154      size);155    // eslint-disable-next-line no-constructor-return156    return makeTransferable(this);157  }158  /**159   * @readonly160   * @type {boolean}161   */162  get locked() {163    if (!isWritableStream(this))164      throw new ERR_INVALID_THIS('WritableStream');165    return isWritableStreamLocked(this);166  }167  /**168   * @param {any} reason169   * @returns {Promise<vois>}170   */171  abort(reason = undefined) {172    if (!isWritableStream(this))173      return PromiseReject(new ERR_INVALID_THIS('WritableStream'));174    if (isWritableStreamLocked(this)) {175      return PromiseReject(176        new ERR_INVALID_STATE.TypeError('WritableStream is locked'));177    }178    return writableStreamAbort(this, reason);179  }180  /**181   * @returns {Promise<void>}182   */183  close() {184    if (!isWritableStream(this))185      return PromiseReject(new ERR_INVALID_THIS('WritableStream'));186    if (isWritableStreamLocked(this)) {187      return PromiseReject(188        new ERR_INVALID_STATE.TypeError('WritableStream is locked'));189    }190    if (writableStreamCloseQueuedOrInFlight(this)) {191      return PromiseReject(192        new ERR_INVALID_STATE.TypeError('Failure closing WritableStream'));193    }194    return writableStreamClose(this);195  }196  /**197   * @returns {WritableStreamDefaultWriter}198   */199  getWriter() {200    if (!isWritableStream(this))201      throw new ERR_INVALID_THIS('WritableStream');202    return new WritableStreamDefaultWriter(this);203  }204  [kInspect](depth, options) {205    return customInspect(depth, options, this[kType], {206      locked: this.locked,207      state: this[kState].state,208    });209  }210  [kTransfer]() {211    if (!isWritableStream(this))212      throw new ERR_INVALID_THIS('WritableStream');213    if (this.locked) {214      this[kState].transfer.port1?.close();215      this[kState].transfer.port1 = undefined;216      this[kState].transfer.port2 = undefined;217      throw new DOMException(218        'Cannot transfer a locked WritableStream',219        'DataCloneError');220    }221    const {222      readable,223      promise,224    } = lazyTransfer().newCrossRealmReadableStream(225      this,226      this[kState].transfer.port1);227    this[kState].transfer.readable = readable;228    this[kState].transfer.promise = promise;229    setPromiseHandled(this[kState].transfer.promise);230    return {231      data: { port: this[kState].transfer.port2 },232      deserializeInfo:233        'internal/webstreams/writablestream:TransferredWritableStream'234    };235  }236  [kTransferList]() {237    const { port1, port2 } = new MessageChannel();238    this[kState].transfer.port1 = port1;239    this[kState].transfer.port2 = port2;240    return [ port2 ];241  }242  [kDeserialize]({ port }) {243    const transfer = lazyTransfer();244    setupWritableStreamDefaultControllerFromSink(245      this,246      new transfer.CrossRealmTransformWritableSink(port),247      1,248      () => 1);249  }250}251ObjectDefineProperties(WritableStream.prototype, {252  locked: kEnumerableProperty,253  abort: kEnumerableProperty,254  close: kEnumerableProperty,255  getWriter: kEnumerableProperty,256});257function TransferredWritableStream() {258  return makeTransferable(ReflectConstruct(259    function() {260      this[kType] = 'WritableStream';261      this[kState] = {262        close: createDeferredPromise(),263        closeRequest: {264          promise: undefined,265          resolve: undefined,266          reject: undefined,267        },268        inFlightWriteRequest: {269          promise: undefined,270          resolve: undefined,271          reject: undefined,272        },273        inFlightCloseRequest: {274          promise: undefined,275          resolve: undefined,276          reject: undefined,277        },278        pendingAbortRequest: {279          abort: {280            promise: undefined,281            resolve: undefined,282            reject: undefined,283          },284          reason: undefined,285          wasAlreadyErroring: false,286        },287        backpressure: false,288        controller: undefined,289        state: 'writable',290        storedError: undefined,291        writeRequests: [],292        writer: undefined,293        transfer: {294          promise: undefined,295          port1: undefined,296          port2: undefined,297          readable: undefined,298        },299      };300    },301    [], WritableStream));302}303TransferredWritableStream.prototype[kDeserialize] = () => {};304class WritableStreamDefaultWriter {305  [kType] = 'WritableStreamDefaultWriter';306  get [SymbolToStringTag]() { return this[kType]; }307  /**308   * @param {WritableStream} stream309   */310  constructor(stream) {311    if (!isWritableStream(stream))312      throw new ERR_INVALID_ARG_TYPE('stream', 'WritableStream', stream);313    this[kState] = {314      stream: undefined,315      close: {316        promise: undefined,317        resolve: undefined,318        reject: undefined,319      },320      ready: {321        promise: undefined,322        resolve: undefined,323        reject: undefined,324      }325    };326    setupWritableStreamDefaultWriter(this, stream);327  }328  /**329   * @readonly330   * @type {Promise<void>}331   */332  get closed() {333    if (!isWritableStreamDefaultWriter(this))334      return PromiseReject(new ERR_INVALID_THIS('WritableStreamDefaultWriter'));335    return this[kState].close.promise;336  }337  /**338   * @readonly339   * @type {number}340   */341  get desiredSize() {342    if (!isWritableStreamDefaultWriter(this))343      throw new ERR_INVALID_THIS('WritableStreamDefaultWriter');344    if (this[kState].stream === undefined) {345      throw new ERR_INVALID_STATE.TypeError(346        'Writer is not bound to a WritableStream');347    }348    return writableStreamDefaultWriterGetDesiredSize(this);349  }350  /**351   * @readonly352   * @type {Promise<void>}353   */354  get ready() {355    if (!isWritableStreamDefaultWriter(this))356      return PromiseReject(new ERR_INVALID_THIS('WritableStreamDefaultWriter'));357    return this[kState].ready.promise;358  }359  /**360   * @param {any} reason361   * @returns {Promise<void>}362   */363  abort(reason = undefined) {364    if (!isWritableStreamDefaultWriter(this))365      return PromiseReject(new ERR_INVALID_THIS('WritableStreamDefaultWriter'));366    if (this[kState].stream === undefined) {367      return PromiseReject(368        new ERR_INVALID_STATE.TypeError(369          'Writer is not bound to a WritableStream'));370    }371    return writableStreamDefaultWriterAbort(this, reason);372  }373  /**374   * @returns {Promise<void>}375   */376  close() {377    if (!isWritableStreamDefaultWriter(this))378      return PromiseReject(new ERR_INVALID_THIS('WritableStreamDefaultWriter'));379    const {380      stream,381    } = this[kState];382    if (stream === undefined) {383      return PromiseReject(384        new ERR_INVALID_STATE.TypeError(385          'Writer is not bound to a WritableStream'));386    }387    if (writableStreamCloseQueuedOrInFlight(stream)) {388      return PromiseReject(389        new ERR_INVALID_STATE.TypeError('Failure to close WritableStream'));390    }391    return writableStreamDefaultWriterClose(this);392  }393  releaseLock() {394    if (!isWritableStreamDefaultWriter(this))395      throw new ERR_INVALID_THIS('WritableStreamDefaultWriter');396    const {397      stream,398    } = this[kState];399    if (stream === undefined)400      return;401    assert(stream[kState].writer !== undefined);402    writableStreamDefaultWriterRelease(this);403  }404  /**405   * @param {any} chunk406   * @returns {Promise<void>}407   */408  write(chunk = undefined) {409    if (!isWritableStreamDefaultWriter(this))410      return PromiseReject(new ERR_INVALID_THIS('WritableStreamDefaultWriter'));411    if (this[kState].stream === undefined) {412      return PromiseReject(413        new ERR_INVALID_STATE.TypeError(414          'Writer is not bound to a WritableStream'));415    }416    return writableStreamDefaultWriterWrite(this, chunk);417  }418  [kInspect](depth, options) {419    return customInspect(depth, options, this[kType], {420      stream: this[kState].stream,421      close: this[kState].close.promise,422      ready: this[kState].ready.promise,423      desiredSize: this.desiredSize,424    });425  }426}427ObjectDefineProperties(WritableStreamDefaultWriter.prototype, {428  closed: kEnumerableProperty,429  ready: kEnumerableProperty,430  desiredSize: kEnumerableProperty,431  abort: kEnumerableProperty,432  close: kEnumerableProperty,433  releaseLock: kEnumerableProperty,434  write: kEnumerableProperty,435});436class WritableStreamDefaultController {437  [kType] = 'WritableStreamDefaultController';438  get [SymbolToStringTag]() { return this[kType]; }439  constructor() {440    throw new ERR_ILLEGAL_CONSTRUCTOR();441  }442  [kAbort](reason) {443    const result = this[kState].abortAlgorithm(reason);444    writableStreamDefaultControllerClearAlgorithms(this);445    return result;446  }447  [kError]() {448    resetQueue(this);449  }450  /**451   * @type {any}452   */453  get abortReason() {454    if (!isWritableStreamDefaultController(this))455      throw new ERR_INVALID_THIS('WritableStreamDefaultController');456    return this[kState].abortReason;457  }458  /**459   * @type {AbortSignal}460   */461  get signal() {462    if (!isWritableStreamDefaultController(this))463      throw new ERR_INVALID_THIS('WritableStreamDefaultController');464    return this[kState].abortController.signal;465  }466  /**467   * @param {any} error468   */469  error(error = undefined) {470    if (!isWritableStreamDefaultController(this))471      throw new ERR_INVALID_THIS('WritableStreamDefaultController');472    if (this[kState].stream[kState].state !== 'writable')473      return;474    writableStreamDefaultControllerError(this, error);475  }476  [kInspect](depth, options) {477    return customInspect(depth, options, this[kType], {478      stream: this[kState].stream,479    });480  }481}482ObjectDefineProperties(WritableStreamDefaultController.prototype, {483  abortReason: kEnumerableProperty,484  signal: kEnumerableProperty,485  error: kEnumerableProperty,486});487function createWritableStreamDefaultController() {488  return ReflectConstruct(489    function() {490      this[kType] = 'WritableStreamDefaultController';491    },492    [], WritableStreamDefaultController);493}494const isWritableStream =495  isBrandCheck('WritableStream');496const isWritableStreamDefaultWriter =497  isBrandCheck('WritableStreamDefaultWriter');498const isWritableStreamDefaultController =499  isBrandCheck('WritableStreamDefaultController');500function isWritableStreamLocked(stream) {501  return stream[kState].writer !== undefined;502}503function setupWritableStreamDefaultWriter(writer, stream) {504  if (isWritableStreamLocked(stream))505    throw new ERR_INVALID_STATE.TypeError('WritableStream is locked');506  writer[kState].stream = stream;507  stream[kState].writer = writer;508  switch (stream[kState].state) {509    case 'writable':510      if (!writableStreamCloseQueuedOrInFlight(stream) &&511          stream[kState].backpressure) {512        writer[kState].ready = createDeferredPromise();513      } else {514        writer[kState].ready = {515          promise: PromiseResolve(),516          resolve: undefined,517          reject: undefined,518        };519      }520      setClosedPromiseToNewPromise();521      break;522    case 'erroring':523      writer[kState].ready = {524        promise: PromiseReject(stream[kState].storedError),525        resolve: undefined,526        reject: undefined,527      };528      setPromiseHandled(writer[kState].ready.promise);529      setClosedPromiseToNewPromise();530      break;531    case 'closed':532      writer[kState].ready = {533        promise: PromiseResolve(),534        resolve: undefined,535        reject: undefined,536      };537      writer[kState].close = {538        promise: PromiseResolve(),539        resolve: undefined,540        reject: undefined,541      };542      break;543    default:544      writer[kState].ready = {545        promise: PromiseReject(stream[kState].storedError),546        resolve: undefined,547        reject: undefined,548      };549      writer[kState].close = {550        promise: PromiseReject(stream[kState].storedError),551        resolve: undefined,552        reject: undefined,553      };554      setPromiseHandled(writer[kState].ready.promise);555      setPromiseHandled(writer[kState].close.promise);556  }557  function setClosedPromiseToNewPromise() {558    writer[kState].close = createDeferredPromise();559  }560}561function writableStreamAbort(stream, reason) {562  const {563    state,564    controller,565  } = stream[kState];566  if (state === 'closed' || state === 'errored')567    return PromiseResolve();568  controller[kState].abortReason = reason;569  controller[kState].abortController.abort();570  if (stream[kState].pendingAbortRequest.abort.promise !== undefined)571    return stream[kState].pendingAbortRequest.abort.promise;572  assert(state === 'writable' || state === 'erroring');573  let wasAlreadyErroring = false;574  if (state === 'erroring') {575    wasAlreadyErroring = true;576    reason = undefined;577  }578  const abort = createDeferredPromise();579  stream[kState].pendingAbortRequest = {580    abort,581    reason,582    wasAlreadyErroring,583  };584  if (!wasAlreadyErroring)585    writableStreamStartErroring(stream, reason);586  return abort.promise;587}588function writableStreamClose(stream) {589  const {590    state,591    writer,592    backpressure,593    controller,594  } = stream[kState];595  if (state === 'closed' || state === 'errored') {596    return PromiseReject(597      new ERR_INVALID_STATE.TypeError('WritableStream is closed'));598  }599  assert(state === 'writable' || state === 'erroring');600  assert(!writableStreamCloseQueuedOrInFlight(stream));601  stream[kState].closeRequest = createDeferredPromise();602  const { promise } = stream[kState].closeRequest;603  if (writer !== undefined && backpressure && state === 'writable')604    writer[kState].ready.resolve?.();605  writableStreamDefaultControllerClose(controller);606  return promise;607}608function writableStreamUpdateBackpressure(stream, backpressure) {609  assert(stream[kState].state === 'writable');610  assert(!writableStreamCloseQueuedOrInFlight(stream));611  const {612    writer,613  } = stream[kState];614  if (writer !== undefined && stream[kState].backpressure !== backpressure) {615    if (backpressure) {616      writer[kState].ready = createDeferredPromise();617    } else {618      writer[kState].ready.resolve?.();619    }620  }621  stream[kState].backpressure = backpressure;622}623function writableStreamStartErroring(stream, reason) {624  assert(stream[kState].storedError === undefined);625  assert(stream[kState].state === 'writable');626  const {627    controller,628    writer,629  } = stream[kState];630  assert(controller !== undefined);631  stream[kState].state = 'erroring';632  stream[kState].storedError = reason;633  if (writer !== undefined) {634    writableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);635  }636  if (!writableStreamHasOperationMarkedInFlight(stream) &&637      controller[kState].started) {638    writableStreamFinishErroring(stream);639  }640}641function writableStreamRejectCloseAndClosedPromiseIfNeeded(stream) {642  assert(stream[kState].state === 'errored');643  if (stream[kState].closeRequest.promise !== undefined) {644    assert(stream[kState].inFlightCloseRequest.promise === undefined);645    stream[kState].closeRequest.reject?.(stream[kState].storedError);646    stream[kState].closeRequest = {647      promise: undefined,648      reject: undefined,649      resolve: undefined,650    };651  }652  const {653    writer,654  } = stream[kState];655  if (writer !== undefined) {656    writer[kState].close.reject?.(stream[kState].storedError);657    setPromiseHandled(writer[kState].close.promise);658  }659}660function writableStreamMarkFirstWriteRequestInFlight(stream) {661  assert(stream[kState].inFlightWriteRequest.promise === undefined);662  assert(stream[kState].writeRequests.length);663  const writeRequest = ArrayPrototypeShift(stream[kState].writeRequests);664  stream[kState].inFlightWriteRequest = writeRequest;665}666function writableStreamMarkCloseRequestInFlight(stream) {667  assert(stream[kState].inFlightWriteRequest.promise === undefined);668  assert(stream[kState].closeRequest.promise !== undefined);669  stream[kState].inFlightCloseRequest = stream[kState].closeRequest;670  stream[kState].closeRequest = {671    promise: undefined,672    resolve: undefined,673    reject: undefined,674  };675}676function writableStreamHasOperationMarkedInFlight(stream) {677  const {678    inFlightWriteRequest,679    inFlightCloseRequest,680  } = stream[kState];681  if (inFlightWriteRequest.promise === undefined &&682      inFlightCloseRequest.promise === undefined) {683    return false;684  }685  return true;686}687function writableStreamFinishInFlightWriteWithError(stream, error) {688  assert(stream[kState].inFlightWriteRequest.promise !== undefined);689  stream[kState].inFlightWriteRequest.reject?.(error);690  stream[kState].inFlightWriteRequest = {691    promise: undefined,692    resolve: undefined,693    reject: undefined,694  };695  assert(stream[kState].state === 'writable' ||696         stream[kState].state === 'erroring');697  writableStreamDealWithRejection(stream, error);698}699function writableStreamFinishInFlightWrite(stream) {700  assert(stream[kState].inFlightWriteRequest.promise !== undefined);701  stream[kState].inFlightWriteRequest.resolve?.();702  stream[kState].inFlightWriteRequest = {703    promise: undefined,704    resolve: undefined,705    reject: undefined,706  };707}708function writableStreamFinishInFlightCloseWithError(stream, error) {709  assert(stream[kState].inFlightCloseRequest.promise !== undefined);710  stream[kState].inFlightCloseRequest.reject?.(error);711  stream[kState].inFlightCloseRequest = {712    promise: undefined,713    resolve: undefined,714    reject: undefined,715  };716  assert(stream[kState].state === 'writable' ||717         stream[kState].state === 'erroring');718  if (stream[kState].pendingAbortRequest.abort.promise !== undefined) {719    stream[kState].pendingAbortRequest.abort.reject?.(error);720    stream[kState].pendingAbortRequest = {721      abort: {722        promise: undefined,723        resolve: undefined,724        reject: undefined,725      },726      reason: undefined,727      wasAlreadyErroring: false,728    };729  }730  writableStreamDealWithRejection(stream, error);731}732function writableStreamFinishInFlightClose(stream) {733  assert(stream[kState].inFlightCloseRequest.promise !== undefined);734  stream[kState].inFlightCloseRequest.resolve?.();735  stream[kState].inFlightCloseRequest = {736    promise: undefined,737    resolve: undefined,738    reject: undefined,739  };740  if (stream[kState].state === 'erroring') {741    stream[kState].storedError = undefined;742    if (stream[kState].pendingAbortRequest.abort.promise !== undefined) {743      stream[kState].pendingAbortRequest.abort.resolve?.();744      stream[kState].pendingAbortRequest = {745        abort: {746          promise: undefined,747          resolve: undefined,748          reject: undefined,749        },750        reason: undefined,751        wasAlreadyErroring: false,752      };753    }754  }755  stream[kState].state = 'closed';756  if (stream[kState].writer !== undefined)757    stream[kState].writer[kState].close.resolve?.();758  assert(stream[kState].pendingAbortRequest.abort.promise === undefined);759  assert(stream[kState].storedError === undefined);760}761function writableStreamFinishErroring(stream) {762  assert(stream[kState].state === 'erroring');763  assert(!writableStreamHasOperationMarkedInFlight(stream));764  stream[kState].state = 'errored';765  stream[kState].controller[kError]();766  const storedError = stream[kState].storedError;767  for (let n = 0; n < stream[kState].writeRequests.length; n++)768    stream[kState].writeRequests[n].reject?.(storedError);769  stream[kState].writeRequests = [];770  if (stream[kState].pendingAbortRequest.abort.promise === undefined) {771    writableStreamRejectCloseAndClosedPromiseIfNeeded(stream);772    return;773  }774  const abortRequest = stream[kState].pendingAbortRequest;775  stream[kState].pendingAbortRequest = {776    abort: {777      promise: undefined,778      resolve: undefined,779      reject: undefined,780    },781    reason: undefined,782    wasAlreadyErroring: false,783  };784  if (abortRequest.wasAlreadyErroring) {785    abortRequest.abort.reject?.(storedError);786    writableStreamRejectCloseAndClosedPromiseIfNeeded(stream);787    return;788  }789  PromisePrototypeThen(790    ensureIsPromise(791      stream[kState].controller[kAbort],792      stream[kState].controller,793      abortRequest.reason),794    () => {795      abortRequest.abort.resolve?.();796      writableStreamRejectCloseAndClosedPromiseIfNeeded(stream);797    },798    (error) => {799      abortRequest.abort.reject?.(error);800      writableStreamRejectCloseAndClosedPromiseIfNeeded(stream);801    });802}803function writableStreamDealWithRejection(stream, error) {804  const {805    state,806  } = stream[kState];807  if (state === 'writable') {808    writableStreamStartErroring(stream, error);809    return;810  }811  assert(state === 'erroring');812  writableStreamFinishErroring(stream);813}814function writableStreamCloseQueuedOrInFlight(stream) {815  if (stream[kState].closeRequest.promise === undefined &&816      stream[kState].inFlightCloseRequest.promise === undefined) {817    return false;818  }819  return true;820}821function writableStreamAddWriteRequest(stream) {822  assert(isWritableStreamLocked(stream));823  assert(stream[kState].state === 'writable');824  const {825    promise,826    resolve,827    reject,828  } = createDeferredPromise();829  ArrayPrototypePush(830    stream[kState].writeRequests,831    {832      promise,833      resolve,834      reject,835    });836  return promise;837}838function writableStreamDefaultWriterWrite(writer, chunk) {839  const {840    stream,841  } = writer[kState];842  assert(stream !== undefined);843  const {844    controller,845  } = stream[kState];846  const chunkSize = writableStreamDefaultControllerGetChunkSize(847    controller,848    chunk);849  if (stream !== writer[kState].stream) {850    return PromiseReject(851      new ERR_INVALID_STATE.TypeError('Mismatched WritableStreams'));852  }853  const {854    state,855  } = stream[kState];856  if (state === 'errored')857    return PromiseReject(stream[kState].storedError);858  if (writableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {859    return PromiseReject(860      new ERR_INVALID_STATE.TypeError('WritableStream is closed'));861  }862  if (state === 'erroring')863    return PromiseReject(stream[kState].storedError);864  assert(state === 'writable');865  const promise = writableStreamAddWriteRequest(stream);866  writableStreamDefaultControllerWrite(controller, chunk, chunkSize);867  return promise;868}869function writableStreamDefaultWriterRelease(writer) {870  const {871    stream,872  } = writer[kState];873  assert(stream !== undefined);874  assert(stream[kState].writer === writer);875  const releasedError =876    new ERR_INVALID_STATE.TypeError('Writer has been released');877  writableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);878  writableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);879  stream[kState].writer = undefined;880  writer[kState].stream = undefined;881}882function writableStreamDefaultWriterGetDesiredSize(writer) {883  const {884    stream,885  } = writer[kState];886  switch (stream[kState].state) {887    case 'errored':888      // Fall through889    case 'erroring':890      return null;891    case 'closed':892      return 0;893  }894  return writableStreamDefaultControllerGetDesiredSize(895    stream[kState].controller);896}897function writableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) {898  if (isPromisePending(writer[kState].ready.promise)) {899    writer[kState].ready.reject?.(error);900  } else {901    writer[kState].ready = {902      promise: PromiseReject(error),903      resolve: undefined,904      reject: undefined,905    };906  }907  setPromiseHandled(writer[kState].ready.promise);908}909function writableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) {910  if (isPromisePending(writer[kState].close.promise)) {911    writer[kState].close.reject?.(error);912  } else {913    writer[kState].close = {914      promise: PromiseReject(error),915      resolve: undefined,916      reject: undefined,917    };918  }919  setPromiseHandled(writer[kState].close.promise);920}921function writableStreamDefaultWriterCloseWithErrorPropagation(writer) {922  const {923    stream,924  } = writer[kState];925  assert(stream !== undefined);926  const {927    state,928  } = stream[kState];929  if (writableStreamCloseQueuedOrInFlight(stream) || state === 'closed')930    return PromiseResolve();931  if (state === 'errored')932    return PromiseReject(stream[kState].storedError);933  assert(state === 'writable' || state === 'erroring');934  return writableStreamDefaultWriterClose(writer);935}936function writableStreamDefaultWriterClose(writer) {937  const {938    stream,939  } = writer[kState];940  assert(stream !== undefined);941  return writableStreamClose(stream);942}943function writableStreamDefaultWriterAbort(writer, reason) {944  const {945    stream,946  } = writer[kState];947  assert(stream !== undefined);948  return writableStreamAbort(stream, reason);949}950function writableStreamDefaultControllerWrite(controller, chunk, chunkSize) {951  try {952    enqueueValueWithSize(controller, chunk, chunkSize);953  } catch (error) {954    writableStreamDefaultControllerErrorIfNeeded(controller, error);955    return;956  }957  const {958    stream,959  } = controller[kState];960  if (!writableStreamCloseQueuedOrInFlight(stream) &&961      stream[kState].state === 'writable') {962    writableStreamUpdateBackpressure(963      stream,964      writableStreamDefaultControllerGetBackpressure(controller));965  }966  writableStreamDefaultControllerAdvanceQueueIfNeeded(controller);967}968function writableStreamDefaultControllerProcessWrite(controller, chunk) {969  const {970    stream,971    writeAlgorithm,972  } = controller[kState];973  writableStreamMarkFirstWriteRequestInFlight(stream);974  PromisePrototypeThen(975    ensureIsPromise(writeAlgorithm, controller, chunk, controller),976    () => {977      writableStreamFinishInFlightWrite(stream);978      const {979        state,980      } = stream[kState];981      assert(state === 'writable' || state === 'erroring');982      dequeueValue(controller);983      if (!writableStreamCloseQueuedOrInFlight(stream) &&984          state === 'writable') {985        writableStreamUpdateBackpressure(986          stream,987          writableStreamDefaultControllerGetBackpressure(controller));988      }989      writableStreamDefaultControllerAdvanceQueueIfNeeded(controller);990    },991    (error) => {992      if (stream[kState].state === 'writable')993        writableStreamDefaultControllerClearAlgorithms(controller);994      writableStreamFinishInFlightWriteWithError(stream, error);995    });996}997function writableStreamDefaultControllerProcessClose(controller) {998  const {999    closeAlgorithm,1000    queue,1001    stream,1002  } = controller[kState];1003  writableStreamMarkCloseRequestInFlight(stream);1004  dequeueValue(controller);1005  assert(!queue.length);1006  const sinkClosePromise = ensureIsPromise(closeAlgorithm, controller);1007  writableStreamDefaultControllerClearAlgorithms(controller);1008  PromisePrototypeThen(1009    sinkClosePromise,1010    () => writableStreamFinishInFlightClose(stream),1011    (error) => writableStreamFinishInFlightCloseWithError(stream, error));1012}1013function writableStreamDefaultControllerGetDesiredSize(controller) {1014  const {1015    highWaterMark,1016    queueTotalSize,1017  } = controller[kState];1018  return highWaterMark - queueTotalSize;1019}1020function writableStreamDefaultControllerGetChunkSize(controller, chunk) {1021  try {1022    return FunctionPrototypeCall(1023      controller[kState].sizeAlgorithm,1024      undefined,1025      chunk);1026  } catch (error) {1027    writableStreamDefaultControllerErrorIfNeeded(controller, error);1028    return 1;1029  }1030}1031function writableStreamDefaultControllerErrorIfNeeded(controller, error) {1032  const {1033    stream,1034  } = controller[kState];1035  if (stream[kState].state === 'writable')1036    writableStreamDefaultControllerError(controller, error);1037}1038function writableStreamDefaultControllerError(controller, error) {1039  const {1040    stream,1041  } = controller[kState];1042  assert(stream[kState].state === 'writable');1043  writableStreamDefaultControllerClearAlgorithms(controller);1044  writableStreamStartErroring(stream, error);1045}1046function writableStreamDefaultControllerClose(controller) {1047  enqueueValueWithSize(controller, kCloseSentinel, 0);1048  writableStreamDefaultControllerAdvanceQueueIfNeeded(controller);1049}1050function writableStreamDefaultControllerClearAlgorithms(controller) {1051  controller[kState].writeAlgorithm = undefined;1052  controller[kState].closeAlgorithm = undefined;1053  controller[kState].abortAlgorithm = undefined;1054  controller[kState].sizeAlgorithm = undefined;1055}1056function writableStreamDefaultControllerGetBackpressure(controller) {1057  return writableStreamDefaultControllerGetDesiredSize(controller) <= 0;1058}1059function writableStreamDefaultControllerAdvanceQueueIfNeeded(controller) {1060  const {1061    queue,1062    started,1063    stream,1064  } = controller[kState];1065  if (!started || stream[kState].inFlightWriteRequest.promise !== undefined)1066    return;1067  if (stream[kState].state === 'erroring') {1068    writableStreamFinishErroring(stream);1069    return;1070  }1071  if (!queue.length)1072    return;1073  const value = peekQueueValue(controller);1074  if (value === kCloseSentinel)1075    writableStreamDefaultControllerProcessClose(controller);1076  else1077    writableStreamDefaultControllerProcessWrite(controller, value);1078}1079function setupWritableStreamDefaultControllerFromSink(1080  stream,1081  sink,1082  highWaterMark,1083  sizeAlgorithm) {1084  const controller = createWritableStreamDefaultController();1085  const start = sink?.start;1086  const write = sink?.write;1087  const close = sink?.close;1088  const abort = sink?.abort;1089  const startAlgorithm = start ?1090    FunctionPrototypeBind(start, sink, controller) :1091    nonOpStart;1092  const writeAlgorithm = write ?1093    FunctionPrototypeBind(write, sink) :1094    nonOpWrite;1095  const closeAlgorithm = close ?1096    FunctionPrototypeBind(close, sink) : nonOpCancel;1097  const abortAlgorithm = abort ?1098    FunctionPrototypeBind(abort, sink) : nonOpCancel;1099  setupWritableStreamDefaultController(1100    stream,1101    controller,1102    startAlgorithm,1103    writeAlgorithm,1104    closeAlgorithm,1105    abortAlgorithm,1106    highWaterMark,1107    sizeAlgorithm);1108}1109function setupWritableStreamDefaultController(1110  stream,1111  controller,1112  startAlgorithm,1113  writeAlgorithm,1114  closeAlgorithm,1115  abortAlgorithm,1116  highWaterMark,1117  sizeAlgorithm) {1118  assert(isWritableStream(stream));1119  assert(stream[kState].controller === undefined);1120  controller[kState] = {1121    abortAlgorithm,1122    abortReason: undefined,1123    closeAlgorithm,1124    highWaterMark,1125    queue: [],1126    queueTotalSize: 0,1127    abortController: new AbortController(),1128    sizeAlgorithm,1129    started: false,1130    stream,1131    writeAlgorithm,1132  };1133  stream[kState].controller = controller;1134  writableStreamUpdateBackpressure(1135    stream,1136    writableStreamDefaultControllerGetBackpressure(controller));1137  const startResult = startAlgorithm();1138  PromisePrototypeThen(1139    PromiseResolve(startResult),1140    () => {1141      assert(stream[kState].state === 'writable' ||1142             stream[kState].state === 'erroring');1143      controller[kState].started = true;1144      writableStreamDefaultControllerAdvanceQueueIfNeeded(controller);1145    },1146    (error) => {1147      assert(stream[kState].state === 'writable' ||1148             stream[kState].state === 'erroring');1149      controller[kState].started = true;1150      writableStreamDealWithRejection(stream, error);1151    });1152}1153module.exports = {1154  WritableStream,1155  WritableStreamDefaultWriter,1156  WritableStreamDefaultController,1157  TransferredWritableStream,1158  // Exported Brand Checks1159  isWritableStream,1160  isWritableStreamDefaultController,1161  isWritableStreamDefaultWriter,1162  isWritableStreamLocked,1163  setupWritableStreamDefaultWriter,1164  writableStreamAbort,1165  writableStreamClose,1166  writableStreamUpdateBackpressure,1167  writableStreamStartErroring,1168  writableStreamRejectCloseAndClosedPromiseIfNeeded,1169  writableStreamMarkFirstWriteRequestInFlight,1170  writableStreamMarkCloseRequestInFlight,1171  writableStreamHasOperationMarkedInFlight,1172  writableStreamFinishInFlightWriteWithError,1173  writableStreamFinishInFlightWrite,1174  writableStreamFinishInFlightCloseWithError,1175  writableStreamFinishInFlightClose,1176  writableStreamFinishErroring,1177  writableStreamDealWithRejection,1178  writableStreamCloseQueuedOrInFlight,1179  writableStreamAddWriteRequest,1180  writableStreamDefaultWriterWrite,1181  writableStreamDefaultWriterRelease,1182  writableStreamDefaultWriterGetDesiredSize,1183  writableStreamDefaultWriterEnsureReadyPromiseRejected,1184  writableStreamDefaultWriterEnsureClosedPromiseRejected,1185  writableStreamDefaultWriterCloseWithErrorPropagation,1186  writableStreamDefaultWriterClose,1187  writableStreamDefaultWriterAbort,1188  writableStreamDefaultControllerWrite,1189  writableStreamDefaultControllerProcessWrite,1190  writableStreamDefaultControllerProcessClose,1191  writableStreamDefaultControllerGetDesiredSize,1192  writableStreamDefaultControllerGetChunkSize,1193  writableStreamDefaultControllerErrorIfNeeded,1194  writableStreamDefaultControllerError,1195  writableStreamDefaultControllerClose,1196  writableStreamDefaultControllerClearAlgorithms,1197  writableStreamDefaultControllerGetBackpressure,1198  writableStreamDefaultControllerAdvanceQueueIfNeeded,1199  setupWritableStreamDefaultControllerFromSink,1200  setupWritableStreamDefaultController,1201};...

writable_stream_writer.ts

Source:writable_stream_writer.ts

...231) {232  const stream = writer.ownerWritableStream;233  Assert(stream !== void 0);234  const controller = stream.writableStreamController;235  const chunkSize = WritableStreamDefaultControllerGetChunkSize(236    controller,237    chunk238  );239  if (stream !== writer.ownerWritableStream) {240    throw new TypeError("different stream");241  }242  const { state } = stream;243  if (state === "errored") {244    throw stream.storedError;245  }246  if (WritableStreamCloseQueuedOrInFlight(stream) || state === "closed") {247    throw new TypeError(248      `stream is ${state === "closed" ? "closed" : "closing"}`249    );...

Using AI Code Generation

1'use strict';2const assert = require('assert');3const {4} = require('stream/web');5const ws = new WritableStream({6  write() {}7});8const writer = ws.getWriter();9const controller = writer[kState].controller;10const chunk = 'a';11const size = WritableStreamDefaultControllerGetChunkSize(controller, chunk);12assert.strictEqual(size, 1);13'use strict';14const assert = require('assert');15const {16} = require('stream/web');17const ws = new WritableStream({18  write() {}19});20const writer = ws.getWriter();21const controller = writer[kState].controller;22WritableStreamDefaultControllerClose(controller);23assert.strictEqual(ws.locked, false);24'use strict';25const assert = require('assert');26const {27} = require('stream/web');28const ws = new WritableStream({29  write() {}30});31const writer = ws.getWriter();32const controller = writer[kState].controller;33const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);34assert.strictEqual(desiredSize, 1);35'use strict';36const assert = require('assert');37const {38} = require('stream/web');39const ws = new WritableStream({40  write() {}41});42const writer = ws.getWriter();43const controller = writer[kState].controller;44WritableStreamDefaultControllerError(controller, new Error('boom'));45assert.strictEqual(ws.locked, false);46'use strict';47const assert = require('assert');48const {49} = require('stream/web');50const ws = new WritableStream({51  write() {}52});53const writer = ws.getWriter();54WritableStreamDefaultWriterClose(writer);55assert.strictEqual(ws.locked, false);

Using AI Code Generation

1'use strict';2const {3} = require('stream/web');4const writer = new WritableStream().getWriter();5const controller = writer[kState].controller;6const chunk = 'a';7assert_equals(WritableStreamDefaultControllerGetChunkSize(controller, chunk), 1);8I don't think this is a good idea. The spec text for WritableStreamDefaultControllerGetChunkSize() is9"Let size be the result of ? Call(

Using AI Code Generation

1'use strict';2const { WritableStream, WritableStreamDefaultControllerGetChunkSize } = require('stream/web');3const writer = new WritableStream().getWriter();4const controller = writer[kState].controller;5const chunk = 'a';6const result = WritableStreamDefaultControllerGetChunkSize(controller, chunk);7console.log(result);8WritableStreamDefaultControllerGetDesiredSize()9'use strict';10const { WritableStream, WritableStreamDefaultControllerGetDesiredSize } = require('stream/web');11const writer = new WritableStream().getWriter();12const controller = writer[kState].controller;13const result = WritableStreamDefaultControllerGetDesiredSize(controller);14console.log(result);15WritableStreamDefaultControllerWrite()16'use strict';17const { WritableStream, WritableStreamDefaultControllerWrite } = require('stream/web');18const writer = new WritableStream().getWriter();19const controller = writer[kState].controller;20const chunk = 'a';21const result = WritableStreamDefaultControllerWrite(controller, chunk);22console.log(result);23Promise { <pending> }24WritableStreamDefaultControllerClose()25'use strict';

Using AI Code Generation

1'use strict';2const assert = require('assert');3const { WritableStream, WritableStreamDefaultWriter, WritableStreamDefaultControllerGetChunkSize } = require('stream/web');4const { ReadableStream, ReadableStreamDefaultReader } = require('stream/web');5const writer = new WritableStreamDefaultWriter(new WritableStream({6  write() {}7}));8const reader = new ReadableStreamDefaultReader(new ReadableStream({9  start(controller) {10    controller.enqueue(new ArrayBuffer(1024));11  }12}));13async function test() {14  const readResult = await reader.read();15  const size = WritableStreamDefaultControllerGetChunkSize(writer._writableStream._writableStreamController,16    readResult.value);17  assert.strictEqual(size, 1024);18}19test();

Using AI Code Generation

1'use strict';2const { WritableStream } = require('stream/web');3const assert = require('assert');4const writer = new WritableStream().getWriter();5const controller = writer[kState].controller;6const chunk = 'a';7const result = WritableStreamDefaultControllerGetChunkSize(controller, chunk);8assert.strictEqual(result, 1);9assert.throws(() => WritableStreamDefaultControllerGetChunkSize(), {10});11'use strict';12const { WritableStream } = require('stream/web');13const assert = require('assert');14const writer = new WritableStream().getWriter();15const controller = writer[kState].controller;16const result = WritableStreamDefaultControllerGetDesiredSize(controller);17assert.strictEqual(result, 1);18assert.throws(() => WritableStreamDefaultControllerGetDesiredSize(), {19});20'use strict';21const { WritableStream } = require('stream/web');22const assert = require('assert');23const writer = new WritableStream().getWriter();24const controller = writer[kState].controller;25const result = WritableStreamDefaultControllerClose(controller);26assert.strictEqual(result, undefined);27assert.throws(() => WritableStreamDefaultControllerClose(), {28});29'use strict';30const { WritableStream } = require('stream/web');31const assert = require('assert');32const writer = new WritableStream().getWriter();33const controller = writer[kState].controller;34const e = new Error('kaboom');35const result = WritableStreamDefaultControllerError(controller, e);36assert.strictEqual(result, undefined);37assert.throws(() => WritableStreamDefaultControllerError

Using AI Code Generation

1let ws = new WritableStream({2    write(chunk, controller) {3        controller.error();4        controller.error();5    }6});7let writer = ws.getWriter();8writer.write('a');9writer.write('a');10writer.close();

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.