How to use ReadableStreamFulfillReadIntoRequest method in wpt

Best JavaScript code snippet using wpt

ReadableByteStreamInternals.js

Source:ReadableByteStreamInternals.js

1/*2 * Copyright (C) 2016 Canon Inc. All rights reserved.3 *4 * Redistribution and use in source and binary forms, with or without5 * modification, are permitted provided that the following conditions6 * are met:7 * 1. Redistributions of source code must retain the above copyright8 *    notice, this list of conditions and the following disclaimer.9 * 2. Redistributions in binary form must reproduce the above copyright10 *    notice, this list of conditions and the following disclaimer in the11 *    documentation and/or other materials provided with the distribution.12 *13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.24 */25// @conditional=ENABLE(READABLE_STREAM_API) && ENABLE(READABLE_BYTE_STREAM_API)26// @internal27function privateInitializeReadableByteStreamController(stream, underlyingByteSource, highWaterMark)28{29    "use strict";30    if (!@isReadableStream(stream))31        @throwTypeError("ReadableByteStreamController needs a ReadableStream");32    // readableStreamController is initialized with null value.33    if (stream.@readableStreamController !== null)34        @throwTypeError("ReadableStream already has a controller");35    this.@controlledReadableStream = stream;36    this.@underlyingByteSource = underlyingByteSource;37    this.@pullAgain = false;38    this.@pulling = false;39    @readableByteStreamControllerClearPendingPullIntos(this);40    this.@queue = [];41    this.@totalQueuedBytes = 0;42    this.@started = false;43    this.@closeRequested = false;44    let hwm = @Number(highWaterMark);45    if (@isNaN(hwm) || hwm < 0)46        @throwRangeError("highWaterMark value is negative or not a number");47    this.@strategyHWM = hwm;48    let autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;49    if (autoAllocateChunkSize !== @undefined) {50        autoAllocateChunkSize = @Number(autoAllocateChunkSize);51        if (autoAllocateChunkSize <= 0 || autoAllocateChunkSize === @Number.POSITIVE_INFINITY || autoAllocateChunkSize === @Number.NEGATIVE_INFINITY)52            @throwRangeError("autoAllocateChunkSize value is negative or equal to positive or negative infinity");53    }54    this.@autoAllocateChunkSize = autoAllocateChunkSize;55    this.@pendingPullIntos = [];56    const controller = this;57    const startResult = @promiseInvokeOrNoopNoCatch(underlyingByteSource, "start", [this]).@then(() => {58        controller.@started = true;59        @assert(!controller.@pulling);60        @assert(!controller.@pullAgain);61        @readableByteStreamControllerCallPullIfNeeded(controller);62    }, (error) => {63        if (stream.@state === @streamReadable)64            @readableByteStreamControllerError(controller, error);65    });66    this.@cancel = @readableByteStreamControllerCancel;67    this.@pull = @readableByteStreamControllerPull;68    return this;69}70function privateInitializeReadableStreamBYOBRequest(controller, view)71{72    "use strict";73    this.@associatedReadableByteStreamController = controller;74    this.@view = view;75}76function isReadableByteStreamController(controller)77{78    "use strict";79    // Same test mechanism as in isReadableStreamDefaultController (ReadableStreamInternals.js).80    // See corresponding function for explanations.81    return @isObject(controller) && !!controller.@underlyingByteSource;82}83function isReadableStreamBYOBRequest(byobRequest)84{85    "use strict";86    // Same test mechanism as in isReadableStreamDefaultController (ReadableStreamInternals.js).87    // See corresponding function for explanations.88    return @isObject(byobRequest) && !!byobRequest.@associatedReadableByteStreamController;89}90function isReadableStreamBYOBReader(reader)91{92    "use strict";93    // FIXME: Since BYOBReader is not yet implemented, always return false.94    // To be implemented at the same time as BYOBReader (see isReadableStreamDefaultReader95    // to apply same model).96    return false;97}98function readableByteStreamControllerCancel(controller, reason)99{100    "use strict";101    if (controller.@pendingPullIntos.length > 0)102        controller.@pendingPullIntos[0].bytesFilled = 0;103    controller.@queue = [];104    controller.@totalQueuedBytes = 0;105    return @promiseInvokeOrNoop(controller.@underlyingByteSource, "cancel", [reason]);106}107function readableByteStreamControllerError(controller, e)108{109    "use strict";110    @assert(controller.@controlledReadableStream.@state === @streamReadable);111    @readableByteStreamControllerClearPendingPullIntos(controller);112    controller.@queue = [];113    @readableStreamError(controller.@controlledReadableStream, e);114}115function readableByteStreamControllerClose(controller)116{117    "use strict";118    @assert(!controller.@closeRequested);119    @assert(controller.@controlledReadableStream.@state === @streamReadable);120    if (controller.@totalQueuedBytes > 0) {121        controller.@closeRequested = true;122        return;123    }124    if (controller.@pendingPullIntos.length > 0) {125        if (controller.@pendingPullIntos[0].bytesFilled > 0) {126            const e = new @TypeError("Close requested while there remain pending bytes");127            @readableByteStreamControllerError(controller, e);128            throw e;129        }130    }131    @readableStreamClose(controller.@controlledReadableStream);132}133function readableByteStreamControllerClearPendingPullIntos(controller)134{135    "use strict";136    // FIXME: To be implemented in conjunction with ReadableStreamBYOBRequest.137}138function readableByteStreamControllerGetDesiredSize(controller)139{140   "use strict";141   return controller.@strategyHWM - controller.@totalQueuedBytes;142}143function readableStreamHasBYOBReader(stream)144{145    "use strict";146    return stream.@reader !== @undefined && @isReadableStreamBYOBReader(stream.@reader);147}148function readableStreamHasDefaultReader(stream)149{150    "use strict";151    return stream.@reader !== @undefined && @isReadableStreamDefaultReader(stream.@reader);152}153function readableByteStreamControllerHandleQueueDrain(controller) {154    "use strict";155    @assert(controller.@controlledReadableStream.@state === @streamReadable);156    if (!controller.@totalQueuedBytes && controller.@closeRequested)157        @readableStreamClose(controller.@controlledReadableStream);158    else159        @readableByteStreamControllerCallPullIfNeeded(controller);160}161function readableByteStreamControllerPull(controller)162{163    "use strict";164    const stream = controller.@controlledReadableStream;165    @assert(@readableStreamHasDefaultReader(stream));166    if (controller.@totalQueuedBytes > 0) {167        @assert(stream.@reader.@readRequests.length === 0);168        const entry = controller.@queue.@shift();169        controller.@totalQueuedBytes -= entry.byteLength;170        @readableByteStreamControllerHandleQueueDrain(controller);171        let view;172        try {173            view = new @Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);174        } catch (error) {175            return @Promise.@reject(error);176        }177        return @Promise.@resolve({value: view, done: false});178    }179    if (controller.@autoAllocateChunkSize !== @undefined) {180        let buffer;181        try {182            buffer = new @ArrayBuffer(controller.@autoAllocateChunkSize);183        } catch (error) {184            return @Promise.@reject(error);185        }186        const pullIntoDescriptor = {187            buffer,188            byteOffset: 0,189            byteLength: controller.@autoAllocateChunkSize,190            bytesFilled: 0,191            elementSize: 1,192            ctor: @Uint8Array,193            readerType: 'default'194        };195        controller.@pendingPullIntos.@push(pullIntoDescriptor);196    }197    const promise = @readableStreamAddReadRequest(stream);198    @readableByteStreamControllerCallPullIfNeeded(controller);199    return promise;200}201function readableByteStreamControllerShouldCallPull(controller)202{203    "use strict";204    const stream = controller.@controlledReadableStream;205    if (stream.@state !== @streamReadable)206        return false;207    if (controller.@closeRequested)208        return false;209    if (!controller.@started)210        return false;211    if (@readableStreamHasDefaultReader(stream) && stream.@reader.@readRequests.length > 0)212        return true;213    if (@readableStreamHasBYOBReader(stream) && stream.@reader.@readIntoRequests.length > 0)214        return true;215    if (@readableByteStreamControllerGetDesiredSize(controller) > 0)216        return true;217    return false;218}219function readableByteStreamControllerCallPullIfNeeded(controller)220{221    "use strict";222    if (!@readableByteStreamControllerShouldCallPull(controller))223        return;224    if (controller.@pulling) {225        controller.@pullAgain = true;226        return;227    }228    @assert(!controller.@pullAgain);229    controller.@pulling = true;230    @promiseInvokeOrNoop(controller.@underlyingByteSource, "pull", [controller]).@then(() => {231        controller.@pulling = false;232        if (controller.@pullAgain) {233            controller.@pullAgain = false;234            @readableByteStreamControllerCallPullIfNeeded(controller);235        }236    }, (error) => {237        if (controller.@controlledReadableStream.@state === @streamReadable)238            @readableByteStreamControllerError(controller, error);239    });240}241function transferBufferToCurrentRealm(buffer)242{243    "use strict";244    // FIXME: Determine what should be done here exactly (what is already existing in current245    // codebase and what has to be added). According to spec, Transfer operation should be246    // performed in order to transfer buffer to current realm. For the moment, simply return247    // received buffer.248    return buffer;249}250function readableByteStreamControllerEnqueue(controller, chunk)251{252    "use strict";253    const stream = controller.@controlledReadableStream;254    @assert(!controller.@closeRequested);255    @assert(stream.@state === @streamReadable);256    const buffer = chunk.buffer;257    const byteOffset = chunk.byteOffset;258    const byteLength = chunk.byteLength;259    const transferredBuffer = @transferBufferToCurrentRealm(buffer);260    if (@readableStreamHasDefaultReader(stream)) {261        if (!stream.@reader.@readRequests.length)262            @readableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);263        else {264            @assert(!controller.@queue.length);265            let transferredView = new @Uint8Array(transferredBuffer, byteOffset, byteLength);266            @readableStreamFulfillReadRequest(stream, transferredView, false);267        }268        return;269    }270    if (@readableStreamHasBYOBReader(stream)) {271        // FIXME: To be implemented once ReadableStreamBYOBReader has been implemented (for the moment,272        // test cannot be true).273        @throwTypeError("ReadableByteStreamController enqueue operation has no support for BYOB reader");274        return;275    }276    @assert(!@isReadableStreamLocked(stream));277    @readableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);278}279function readableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength)280{281    "use strict";282    controller.@queue.@push({283        buffer: buffer,284        byteOffset: byteOffset,285        byteLength: byteLength286    });287    controller.@totalQueuedBytes += byteLength;288}289function readableByteStreamControllerRespond(controller, bytesWritten)290{291    "use strict";292    bytesWritten = @Number(bytesWritten);293    if (@isNaN(bytesWritten) || bytesWritten === @Number.POSITIVE_INFINITY || bytesWritten < 0 )294        @throwRangeError("bytesWritten has an incorrect value");295    @assert(controller.@pendingPullIntos.length > 0);296    @readableByteStreamControllerRespondInternal(controller, bytesWritten);297}298function readableByteStreamControllerRespondInternal(controller, bytesWritten)299{300    "use strict";301    let firstDescriptor = controller.@pendingPullIntos[0];302    let stream = controller.@controlledReadableStream;303    if (stream.@state === @streamClosed) {304        if (bytesWritten !== 0)305            @throwTypeError("bytesWritten is different from 0 even though stream is closed");306        @readableByteStreamControllerRespondInClosedState(controller, firstDescriptor);307    } else {308        // FIXME: Also implement case of readable state (distinct patch to avoid adding too many different cases309        // in a single patch).310        @throwTypeError("Readable state is not yet supported");311    }312}313function readableByteStreamControllerRespondInClosedState(controller, firstDescriptor)314{315    "use strict";316    firstDescriptor.buffer = @transferBufferToCurrentRealm(firstDescriptor.buffer);317    @assert(firstDescriptor.bytesFilled === 0);318    // FIXME: Spec does not describe below test. However, only ReadableStreamBYOBReader has a readIntoRequests319    // property. This issue has been reported through WHATWG/streams GitHub320    // (https://github.com/whatwg/streams/issues/686), but no solution has been provided for the moment.321    // Therefore, below test is added as a temporary fix.322    if (!@isReadableStreamBYOBReader(controller.@reader))323        return;324    while (controller.@reader.@readIntoRequests.length > 0) {325        let pullIntoDescriptor = @readableByteStreamControllerShiftPendingPullInto(controller);326        @readableByteStreamControllerCommitPullIntoDescriptor(controller.@controlledReadableStream, pullIntoDescriptor);327    }328}329function readableByteStreamControllerShiftPendingPullInto(controller)330{331    "use strict";332    let descriptor = controller.@pendingPullIntos.@shift();333    @readableByteStreamControllerInvalidateBYOBRequest(controller);334    return descriptor;335}336function readableByteStreamControllerInvalidateBYOBRequest(controller)337{338    "use strict";339    if (controller.@byobRequest === @undefined)340        return;341    controller.@byobRequest.@associatedReadableByteStreamController = @undefined;342    controller.@byobRequest.@view = @undefined;343    controller.@byobRequest = @undefined;344}345function readableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor)346{347    "use strict";348    @assert(stream.@state !== @streamErrored);349    let done = false;350    if (stream.@state === @streamClosed) {351        @assert(!pullIntoDescriptor.bytesFilled);352        done = true;353    }354    let filledView = @readableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);355    if (pullIntoDescriptor.readerType === "default")356        @readableStreamFulfillReadRequest(stream, filledView, done);357    else {358        @assert(pullIntoDescriptor.readerType === "byob");359        @readableStreamFulfillReadIntoRequest(stream, filledView, done);360    }361}362function readableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor)363{364    "use strict";365    @assert(pullIntoDescriptor.bytesFilled <= pullIntoDescriptor.bytesLength);366    @assert(pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize === 0);367    return new pullIntoDescriptor.ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, pullIntoDescriptor.bytesFilled / pullIntoDescriptor.elementSize);368}369function readableStreamFulfillReadIntoRequest(stream, chunk, done)370{371    "use strict";372    stream.@reader.@readIntoRequests.@shift().@resolve.@call(@undefined, {value: chunk, done: done});...

byob-reader.ts

Source:byob-reader.ts

...35  assert(IsReadableStreamBYOBReader(stream._reader));36  assert(stream._state === 'readable' || stream._state === 'closed');37  (stream._reader! as ReadableStreamBYOBReader)._readIntoRequests.push(readIntoRequest);38}39export function ReadableStreamFulfillReadIntoRequest(stream: ReadableByteStream,40                                                     chunk: ArrayBufferView,41                                                     done: boolean) {42  const reader = stream._reader as ReadableStreamBYOBReader;43  assert(reader._readIntoRequests.length > 0);44  const readIntoRequest = reader._readIntoRequests.shift()!;45  if (done) {46    readIntoRequest._closeSteps(chunk);47  } else {48    readIntoRequest._chunkSteps(chunk);49  }50}51export function ReadableStreamGetNumReadIntoRequests(stream: ReadableByteStream): number {52  return (stream._reader as ReadableStreamBYOBReader)._readIntoRequests.length;53}...

Using AI Code Generation

1var rs = new ReadableStream({2  pull: function(controller) {3    var view = controller.byobRequest.view;4    view[0] = 0x61;5    view[1] = 0x62;6    view[2] = 0x63;7    controller.byobRequest.respond(3);8  }9});10var reader = rs.getReader({ mode: "byob" });11var start = performance.now();12var readPromise = reader.read(new Uint8Array(3));13var end = performance.now();14readPromise.then(function(result) {15  console.log(result);16  console.log("Time taken to read the data is " + (end - start) + "ms");17});18{value: Uint8Array(3), done: false}19var rs = new ReadableStream({20  pull: function(controller) {21    var view = controller.byobRequest.view;22    view[0] = 0x61;23    view[1] = 0x62;24    view[2] = 0x63;25    controller.byobRequest.respond(3);26  }27});28var reader = rs.getReader({ mode: "byob" });29var start = performance.now();30var readPromise = reader.read(new Uint8Array(3));31var end = performance.now();32readPromise.then(function(result) {33  console.log(result);34  console.log("Time taken to read the data is " + (end - start) + "ms");35});36{value: Uint8Array(3), done: false}37ReadableStreamFulfillReadIntoRequest(stream, chunk, done)

Using AI Code Generation

1var rs = new ReadableStream({2  start(controller) {3    controller.enqueue(new Uint8Array([0x01, 0x02, 0x03]));4    controller.close();5  }6});7var reader = rs.getReader({ mode: "byob" });8var view = new Uint8Array(3);9reader.read(view).then(10  result => {11    assert_equals(result.value.length, 3, "result.value.length");12    assert_equals(result.value[0], 0x01, "result.value[0]");13    assert_equals(result.value[1], 0x02, "result.value[1]");14    assert_equals(result.value[2], 0x03, "result.value[2]");15    assert_true(result.done, "result.done");16  },17  e => assert_unreached(e)18);19var rs = new ReadableStream({20  start(controller) {21    controller.enqueue(new Uint8Array([0x01, 0x02, 0x03]));22    controller.close();23  }24});25var reader = rs.getReader({ mode: "byob" });26var view = new Uint8Array(3);27reader.read(view).then(28  result => {29    assert_equals(result.value.length, 3, "result.value.length");30    assert_equals(result.value[0], 0x01, "result.value[0]");31    assert_equals(result.value[1], 0x02, "result.value[1]");32    assert_equals(result.value[2], 0x03, "result.value[2]");33    assert_true(result.done, "result.done");34  },35  e => assert_unreached(e)36);37var rs = new ReadableStream({38  start(controller) {39    controller.enqueue(new Uint8Array([0x01, 0x02, 0x03]));40    controller.close();41  }42});43var reader = rs.getReader({ mode: "byob" });44var view = new Uint8Array(3);45reader.read(view).then(46  result => {47    assert_equals(result.value.length, 3, "result.value.length");48    assert_equals(result.value[

Using AI Code Generation

1const rs = new ReadableStream({2  start(c) {3    const reader = rs.getReader({mode: 'byob'});4    reader.read(new Uint8Array(1)).then(({value, done}) => {5      console.log(value);6    });7  }8});9const rs = new ReadableStream({10  start(c) {11    c.close();12  }13});14const rs = new ReadableStream({15  start(c) {16    c.enqueue('a');17  }18});19const rs = new ReadableStream({20  start(c) {21    c.error();22  }23});24const rs = new ReadableStream({25  start(c) {26    console.log(c.desiredSize);27  }28});29const rs = new ReadableStream({30  start(c) {31    console.log(c.desiredSize);32  }33});34const rs = new ReadableStream({35  start(c) {36    console.log(c.desiredSize);37  }38});39const rs = new ReadableStream({40  pull(c) {41    console.log(c.desiredSize);42  }43});

Using AI Code Generation

1const rs = new ReadableStream();2const reader = rs.getReader();3const view = new Uint8Array(1);4reader.read(view).then(result => {5  assert_true(result.done);6  assert_equals(result.value, undefined);7});8const rs = new ReadableStream();9const reader = rs.getReader();10const view = new Uint8Array(1);11const controller = rs.getController();12ReadableStreamFulfillReadIntoRequest(controller, view, true);13reader.read(view).then(result => {14  assert_true(result.done);15  assert_equals(result.value, undefined);16});17test(() => {18  const rs = new ReadableStream();19  const reader = rs.getReader();20  const view = new Uint8Array(1);21  ReadableStreamFulfillReadIntoRequest(rs.getController(), view, true);22  reader.read(view).then(result => {23    assert_true(result.done);24    assert_equals(result.value, undefined);25  });26}, 'read() fulfills pending read() with a view');27test(() => {28  const rs = new ReadableStream();29  const reader = rs.getReader();30  const view = new Uint8Array(1);31  const controller = rs.getController();32  ReadableStreamFulfillReadIntoRequest(controller, view, true);33  reader.read(view).then(result => {

Using AI Code Generation

1const rs = new ReadableStream({2  start(controller) {3    controller.enqueue(new Uint8Array([0x01, 0x02]));4  }5});6const reader = rs.getReader({mode: "byob"});7const view = new Uint8Array(2);8return reader.read(view).then(result => {9  assert_equals(result.value, view, "the view should be returned");10  assert_array_equals(result.value, [0x01, 0x02], "the chunk data should be in the view");11  assert_false(result.done, "done");12});13const rs = new ReadableStream();14const reader1 = rs.getReader({mode: "byob"});15const reader2 = rs.getReader({mode: "byob"});16assert_equals(ReadableStreamGetNumReadIntoRequests(rs), 2, "both readers should be waiting");17reader1.releaseLock();18assert_equals(ReadableStreamGetNumReadIntoRequests(rs), 1, "only one reader should be waiting");19reader2.releaseLock();20assert_equals(ReadableStreamGetNumReadIntoRequests(rs), 0, "no readers should be waiting");21const rs = new ReadableStream();22assert_false(ReadableStreamHasBYOBReader(rs), "there should be no BYOB reader");23const reader1 = rs.getReader({mode: "byob"});24assert_true(ReadableStreamHasBYOBReader(rs), "there should be a BYOB reader");25reader1.releaseLock();26assert_false(ReadableStreamHasBYOBReader(rs), "there should be no BYOB reader");

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