mirror of
https://github.com/denoland/deno.git
synced 2024-12-11 01:58:05 -05:00
6728ad4203
I would like to get this change into Deno before merging https://github.com/denoland/deno_lint/pull/1152
6412 lines
179 KiB
JavaScript
6412 lines
179 KiB
JavaScript
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
|
|
|
|
// @ts-check
|
|
/// <reference path="../webidl/internal.d.ts" />
|
|
/// <reference path="./06_streams_types.d.ts" />
|
|
/// <reference path="./lib.deno_web.d.ts" />
|
|
/// <reference lib="esnext" />
|
|
|
|
const core = globalThis.Deno.core;
|
|
const ops = core.ops;
|
|
import * as webidl from "ext:deno_webidl/00_webidl.js";
|
|
import {
|
|
AbortSignalPrototype,
|
|
add,
|
|
newSignal,
|
|
remove,
|
|
signalAbort,
|
|
} from "ext:deno_web/03_abort_signal.js";
|
|
const primordials = globalThis.__bootstrap.primordials;
|
|
const {
|
|
ArrayBuffer,
|
|
ArrayBufferIsView,
|
|
ArrayBufferPrototype,
|
|
ArrayBufferPrototypeGetByteLength,
|
|
ArrayBufferPrototypeSlice,
|
|
ArrayPrototypeMap,
|
|
ArrayPrototypePush,
|
|
ArrayPrototypeShift,
|
|
AsyncGeneratorPrototype,
|
|
BigInt64Array,
|
|
BigUint64Array,
|
|
DataView,
|
|
DataViewPrototypeGetBuffer,
|
|
DataViewPrototypeGetByteLength,
|
|
DataViewPrototypeGetByteOffset,
|
|
Float32Array,
|
|
Float64Array,
|
|
Int16Array,
|
|
Int32Array,
|
|
Int8Array,
|
|
MathMin,
|
|
NumberIsInteger,
|
|
NumberIsNaN,
|
|
ObjectCreate,
|
|
ObjectDefineProperties,
|
|
ObjectDefineProperty,
|
|
ObjectGetPrototypeOf,
|
|
ObjectPrototype,
|
|
ObjectPrototypeIsPrototypeOf,
|
|
ObjectSetPrototypeOf,
|
|
Promise,
|
|
PromisePrototypeCatch,
|
|
PromisePrototypeThen,
|
|
PromiseReject,
|
|
PromiseResolve,
|
|
RangeError,
|
|
ReflectHas,
|
|
SafeFinalizationRegistry,
|
|
SafePromiseAll,
|
|
SafeWeakMap,
|
|
// TODO(lucacasonato): add SharedArrayBuffer to primordials
|
|
// SharedArrayBufferPrototype,
|
|
Symbol,
|
|
SymbolAsyncIterator,
|
|
SymbolFor,
|
|
TypeError,
|
|
TypedArrayPrototypeGetBuffer,
|
|
TypedArrayPrototypeGetByteLength,
|
|
TypedArrayPrototypeGetByteOffset,
|
|
TypedArrayPrototypeGetSymbolToStringTag,
|
|
TypedArrayPrototypeSet,
|
|
TypedArrayPrototypeSlice,
|
|
Uint16Array,
|
|
Uint32Array,
|
|
Uint8Array,
|
|
Uint8ClampedArray,
|
|
WeakMapPrototypeGet,
|
|
WeakMapPrototypeHas,
|
|
WeakMapPrototypeSet,
|
|
queueMicrotask,
|
|
} = primordials;
|
|
import { createFilteredInspectProxy } from "ext:deno_console/01_console.js";
|
|
import { assert, AssertionError } from "ext:deno_web/00_infra.js";
|
|
|
|
/** @template T */
|
|
class Deferred {
|
|
/** @type {Promise<T>} */
|
|
#promise;
|
|
/** @type {(reject?: any) => void} */
|
|
#reject;
|
|
/** @type {(value: T | PromiseLike<T>) => void} */
|
|
#resolve;
|
|
/** @type {"pending" | "fulfilled"} */
|
|
#state = "pending";
|
|
|
|
constructor() {
|
|
this.#promise = new Promise((resolve, reject) => {
|
|
this.#resolve = resolve;
|
|
this.#reject = reject;
|
|
});
|
|
}
|
|
|
|
/** @returns {Promise<T>} */
|
|
get promise() {
|
|
return this.#promise;
|
|
}
|
|
|
|
/** @returns {"pending" | "fulfilled"} */
|
|
get state() {
|
|
return this.#state;
|
|
}
|
|
|
|
/** @param {any=} reason */
|
|
reject(reason) {
|
|
// already settled promises are a no-op
|
|
if (this.#state !== "pending") {
|
|
return;
|
|
}
|
|
this.#state = "fulfilled";
|
|
this.#reject(reason);
|
|
}
|
|
|
|
/** @param {T | PromiseLike<T>} value */
|
|
resolve(value) {
|
|
// already settled promises are a no-op
|
|
if (this.#state !== "pending") {
|
|
return;
|
|
}
|
|
this.#state = "fulfilled";
|
|
this.#resolve(value);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @param {T | PromiseLike<T>} value
|
|
* @returns {Promise<T>}
|
|
*/
|
|
function resolvePromiseWith(value) {
|
|
return new Promise((resolve) => resolve(value));
|
|
}
|
|
|
|
/** @param {any} e */
|
|
function rethrowAssertionErrorRejection(e) {
|
|
if (e && ObjectPrototypeIsPrototypeOf(AssertionError.prototype, e)) {
|
|
queueMicrotask(() => {
|
|
console.error(`Internal Error: ${e.stack}`);
|
|
});
|
|
}
|
|
}
|
|
|
|
/** @param {Promise<any>} promise */
|
|
function setPromiseIsHandledToTrue(promise) {
|
|
PromisePrototypeThen(promise, undefined, rethrowAssertionErrorRejection);
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @template TResult1
|
|
* @template TResult2
|
|
* @param {Promise<T>} promise
|
|
* @param {(value: T) => TResult1 | PromiseLike<TResult1>} fulfillmentHandler
|
|
* @param {(reason: any) => TResult2 | PromiseLike<TResult2>=} rejectionHandler
|
|
* @returns {Promise<TResult1 | TResult2>}
|
|
*/
|
|
function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) {
|
|
return PromisePrototypeThen(promise, fulfillmentHandler, rejectionHandler);
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @template TResult
|
|
* @param {Promise<T>} promise
|
|
* @param {(value: T) => TResult | PromiseLike<TResult>} onFulfilled
|
|
* @returns {void}
|
|
*/
|
|
function uponFulfillment(promise, onFulfilled) {
|
|
uponPromise(promise, onFulfilled);
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @template TResult
|
|
* @param {Promise<T>} promise
|
|
* @param {(value: T) => TResult | PromiseLike<TResult>} onRejected
|
|
* @returns {void}
|
|
*/
|
|
function uponRejection(promise, onRejected) {
|
|
uponPromise(promise, undefined, onRejected);
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @template TResult1
|
|
* @template TResult2
|
|
* @param {Promise<T>} promise
|
|
* @param {(value: T) => TResult1 | PromiseLike<TResult1>} onFulfilled
|
|
* @param {(reason: any) => TResult2 | PromiseLike<TResult2>=} onRejected
|
|
* @returns {void}
|
|
*/
|
|
function uponPromise(promise, onFulfilled, onRejected) {
|
|
PromisePrototypeThen(
|
|
PromisePrototypeThen(promise, onFulfilled, onRejected),
|
|
undefined,
|
|
rethrowAssertionErrorRejection,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @param {ArrayBufferLike} O
|
|
* @returns {boolean}
|
|
*/
|
|
function isDetachedBuffer(O) {
|
|
// deno-lint-ignore prefer-primordials
|
|
if (ObjectPrototypeIsPrototypeOf(SharedArrayBuffer.prototype, O)) {
|
|
return false;
|
|
}
|
|
return ArrayBufferPrototypeGetByteLength(O) === 0 &&
|
|
ops.op_arraybuffer_was_detached(O);
|
|
}
|
|
|
|
/**
|
|
* @param {ArrayBufferLike} O
|
|
* @returns {boolean}
|
|
*/
|
|
function canTransferArrayBuffer(O) {
|
|
assert(typeof O === "object");
|
|
assert(
|
|
ObjectPrototypeIsPrototypeOf(ArrayBufferPrototype, O) ||
|
|
// deno-lint-ignore prefer-primordials
|
|
ObjectPrototypeIsPrototypeOf(SharedArrayBuffer.prototype, O),
|
|
);
|
|
if (isDetachedBuffer(O)) {
|
|
return false;
|
|
}
|
|
// TODO(@crowlKats): 4. If SameValue(O.[[ArrayBufferDetachKey]], undefined) is false, return false.
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @param {ArrayBufferLike} O
|
|
* @returns {ArrayBufferLike}
|
|
*/
|
|
function transferArrayBuffer(O) {
|
|
return ops.op_transfer_arraybuffer(O);
|
|
}
|
|
|
|
/**
|
|
* @param {ArrayBufferLike} O
|
|
* @returns {number}
|
|
*/
|
|
function getArrayBufferByteLength(O) {
|
|
// deno-lint-ignore prefer-primordials
|
|
if (ObjectPrototypeIsPrototypeOf(SharedArrayBuffer.prototype, O)) {
|
|
// TODO(petamoriken): use primordials
|
|
// deno-lint-ignore prefer-primordials
|
|
return O.byteLength;
|
|
} else {
|
|
return ArrayBufferPrototypeGetByteLength(O);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {ArrayBufferView} O
|
|
* @returns {Uint8Array}
|
|
*/
|
|
function cloneAsUint8Array(O) {
|
|
assert(typeof O === "object");
|
|
assert(ArrayBufferIsView(O));
|
|
if (TypedArrayPrototypeGetSymbolToStringTag(O) !== undefined) {
|
|
// TypedArray
|
|
return TypedArrayPrototypeSlice(
|
|
new Uint8Array(
|
|
TypedArrayPrototypeGetBuffer(/** @type {Uint8Array} */ (O)),
|
|
TypedArrayPrototypeGetByteOffset(/** @type {Uint8Array} */ (O)),
|
|
TypedArrayPrototypeGetByteLength(/** @type {Uint8Array} */ (O)),
|
|
),
|
|
);
|
|
} else {
|
|
// DataView
|
|
return TypedArrayPrototypeSlice(
|
|
new Uint8Array(
|
|
DataViewPrototypeGetBuffer(/** @type {DataView} */ (O)),
|
|
DataViewPrototypeGetByteOffset(/** @type {DataView} */ (O)),
|
|
DataViewPrototypeGetByteLength(/** @type {DataView} */ (O)),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
const _abortAlgorithm = Symbol("[[abortAlgorithm]]");
|
|
const _abortSteps = Symbol("[[AbortSteps]]");
|
|
const _autoAllocateChunkSize = Symbol("[[autoAllocateChunkSize]]");
|
|
const _backpressure = Symbol("[[backpressure]]");
|
|
const _backpressureChangePromise = Symbol("[[backpressureChangePromise]]");
|
|
const _byobRequest = Symbol("[[byobRequest]]");
|
|
const _cancelAlgorithm = Symbol("[[cancelAlgorithm]]");
|
|
const _cancelSteps = Symbol("[[CancelSteps]]");
|
|
const _close = Symbol("close sentinel");
|
|
const _closeAlgorithm = Symbol("[[closeAlgorithm]]");
|
|
const _closedPromise = Symbol("[[closedPromise]]");
|
|
const _closeRequest = Symbol("[[closeRequest]]");
|
|
const _closeRequested = Symbol("[[closeRequested]]");
|
|
const _controller = Symbol("[[controller]]");
|
|
const _detached = Symbol("[[Detached]]");
|
|
const _disturbed = Symbol("[[disturbed]]");
|
|
const _errorSteps = Symbol("[[ErrorSteps]]");
|
|
const _flushAlgorithm = Symbol("[[flushAlgorithm]]");
|
|
const _globalObject = Symbol("[[globalObject]]");
|
|
const _highWaterMark = Symbol("[[highWaterMark]]");
|
|
const _inFlightCloseRequest = Symbol("[[inFlightCloseRequest]]");
|
|
const _inFlightWriteRequest = Symbol("[[inFlightWriteRequest]]");
|
|
const _pendingAbortRequest = Symbol("[pendingAbortRequest]");
|
|
const _pendingPullIntos = Symbol("[[pendingPullIntos]]");
|
|
const _preventCancel = Symbol("[[preventCancel]]");
|
|
const _pullAgain = Symbol("[[pullAgain]]");
|
|
const _pullAlgorithm = Symbol("[[pullAlgorithm]]");
|
|
const _pulling = Symbol("[[pulling]]");
|
|
const _pullSteps = Symbol("[[PullSteps]]");
|
|
const _releaseSteps = Symbol("[[ReleaseSteps]]");
|
|
const _queue = Symbol("[[queue]]");
|
|
const _queueTotalSize = Symbol("[[queueTotalSize]]");
|
|
const _readable = Symbol("[[readable]]");
|
|
const _reader = Symbol("[[reader]]");
|
|
const _readRequests = Symbol("[[readRequests]]");
|
|
const _readIntoRequests = Symbol("[[readIntoRequests]]");
|
|
const _readyPromise = Symbol("[[readyPromise]]");
|
|
const _signal = Symbol("[[signal]]");
|
|
const _started = Symbol("[[started]]");
|
|
const _state = Symbol("[[state]]");
|
|
const _storedError = Symbol("[[storedError]]");
|
|
const _strategyHWM = Symbol("[[strategyHWM]]");
|
|
const _strategySizeAlgorithm = Symbol("[[strategySizeAlgorithm]]");
|
|
const _stream = Symbol("[[stream]]");
|
|
const _transformAlgorithm = Symbol("[[transformAlgorithm]]");
|
|
const _view = Symbol("[[view]]");
|
|
const _writable = Symbol("[[writable]]");
|
|
const _writeAlgorithm = Symbol("[[writeAlgorithm]]");
|
|
const _writer = Symbol("[[writer]]");
|
|
const _writeRequests = Symbol("[[writeRequests]]");
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStream<R>} stream
|
|
* @returns {ReadableStreamDefaultReader<R>}
|
|
*/
|
|
function acquireReadableStreamDefaultReader(stream) {
|
|
return new ReadableStreamDefaultReader(stream);
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStream<R>} stream
|
|
* @returns {ReadableStreamBYOBReader<R>}
|
|
*/
|
|
function acquireReadableStreamBYOBReader(stream) {
|
|
const reader = webidl.createBranded(ReadableStreamBYOBReader);
|
|
setUpReadableStreamBYOBReader(reader, stream);
|
|
return reader;
|
|
}
|
|
|
|
/**
|
|
* @template W
|
|
* @param {WritableStream<W>} stream
|
|
* @returns {WritableStreamDefaultWriter<W>}
|
|
*/
|
|
function acquireWritableStreamDefaultWriter(stream) {
|
|
return new WritableStreamDefaultWriter(stream);
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {() => void} startAlgorithm
|
|
* @param {() => Promise<void>} pullAlgorithm
|
|
* @param {(reason: any) => Promise<void>} cancelAlgorithm
|
|
* @param {number=} highWaterMark
|
|
* @param {((chunk: R) => number)=} sizeAlgorithm
|
|
* @returns {ReadableStream<R>}
|
|
*/
|
|
function createReadableStream(
|
|
startAlgorithm,
|
|
pullAlgorithm,
|
|
cancelAlgorithm,
|
|
highWaterMark = 1,
|
|
sizeAlgorithm = () => 1,
|
|
) {
|
|
assert(isNonNegativeNumber(highWaterMark));
|
|
/** @type {ReadableStream} */
|
|
const stream = webidl.createBranded(ReadableStream);
|
|
initializeReadableStream(stream);
|
|
const controller = webidl.createBranded(ReadableStreamDefaultController);
|
|
setUpReadableStreamDefaultController(
|
|
stream,
|
|
controller,
|
|
startAlgorithm,
|
|
pullAlgorithm,
|
|
cancelAlgorithm,
|
|
highWaterMark,
|
|
sizeAlgorithm,
|
|
);
|
|
return stream;
|
|
}
|
|
|
|
/**
|
|
* @template W
|
|
* @param {(controller: WritableStreamDefaultController<W>) => Promise<void>} startAlgorithm
|
|
* @param {(chunk: W) => Promise<void>} writeAlgorithm
|
|
* @param {() => Promise<void>} closeAlgorithm
|
|
* @param {(reason: any) => Promise<void>} abortAlgorithm
|
|
* @param {number} highWaterMark
|
|
* @param {(chunk: W) => number} sizeAlgorithm
|
|
* @returns {WritableStream<W>}
|
|
*/
|
|
function createWritableStream(
|
|
startAlgorithm,
|
|
writeAlgorithm,
|
|
closeAlgorithm,
|
|
abortAlgorithm,
|
|
highWaterMark,
|
|
sizeAlgorithm,
|
|
) {
|
|
assert(isNonNegativeNumber(highWaterMark));
|
|
const stream = webidl.createBranded(WritableStream);
|
|
initializeWritableStream(stream);
|
|
const controller = webidl.createBranded(WritableStreamDefaultController);
|
|
setUpWritableStreamDefaultController(
|
|
stream,
|
|
controller,
|
|
startAlgorithm,
|
|
writeAlgorithm,
|
|
closeAlgorithm,
|
|
abortAlgorithm,
|
|
highWaterMark,
|
|
sizeAlgorithm,
|
|
);
|
|
return stream;
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @param {{ [_queue]: Array<ValueWithSize<T>>, [_queueTotalSize]: number }} container
|
|
* @returns {T}
|
|
*/
|
|
function dequeueValue(container) {
|
|
assert(
|
|
ReflectHas(container, _queue) &&
|
|
ReflectHas(container, _queueTotalSize),
|
|
);
|
|
assert(container[_queue].length);
|
|
const valueWithSize = ArrayPrototypeShift(container[_queue]);
|
|
container[_queueTotalSize] -= valueWithSize.size;
|
|
if (container[_queueTotalSize] < 0) {
|
|
container[_queueTotalSize] = 0;
|
|
}
|
|
return valueWithSize.value;
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @param {{ [_queue]: Array<ValueWithSize<T | _close>>, [_queueTotalSize]: number }} container
|
|
* @param {T} value
|
|
* @param {number} size
|
|
* @returns {void}
|
|
*/
|
|
function enqueueValueWithSize(container, value, size) {
|
|
assert(
|
|
ReflectHas(container, _queue) &&
|
|
ReflectHas(container, _queueTotalSize),
|
|
);
|
|
if (isNonNegativeNumber(size) === false) {
|
|
throw RangeError("chunk size isn't a positive number");
|
|
}
|
|
if (size === Infinity) {
|
|
throw RangeError("chunk size is invalid");
|
|
}
|
|
ArrayPrototypePush(container[_queue], { value, size });
|
|
container[_queueTotalSize] += size;
|
|
}
|
|
|
|
/**
|
|
* @param {QueuingStrategy} strategy
|
|
* @param {number} defaultHWM
|
|
*/
|
|
function extractHighWaterMark(strategy, defaultHWM) {
|
|
if (strategy.highWaterMark === undefined) {
|
|
return defaultHWM;
|
|
}
|
|
const highWaterMark = strategy.highWaterMark;
|
|
if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {
|
|
throw RangeError(
|
|
`Expected highWaterMark to be a positive number or Infinity, got "${highWaterMark}".`,
|
|
);
|
|
}
|
|
return highWaterMark;
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @param {QueuingStrategy<T>} strategy
|
|
* @return {(chunk: T) => number}
|
|
*/
|
|
function extractSizeAlgorithm(strategy) {
|
|
if (strategy.size === undefined) {
|
|
return () => 1;
|
|
}
|
|
return (chunk) =>
|
|
webidl.invokeCallbackFunction(
|
|
strategy.size,
|
|
[chunk],
|
|
undefined,
|
|
webidl.converters["unrestricted double"],
|
|
"Failed to call `sizeAlgorithm`",
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @param {() => void} startAlgorithm
|
|
* @param {() => Promise<void>} pullAlgorithm
|
|
* @param {(reason: any) => Promise<void>} cancelAlgorithm
|
|
* @returns {ReadableStream}
|
|
*/
|
|
function createReadableByteStream(
|
|
startAlgorithm,
|
|
pullAlgorithm,
|
|
cancelAlgorithm,
|
|
) {
|
|
const stream = webidl.createBranded(ReadableStream);
|
|
initializeReadableStream(stream);
|
|
const controller = webidl.createBranded(ReadableByteStreamController);
|
|
setUpReadableByteStreamController(
|
|
stream,
|
|
controller,
|
|
startAlgorithm,
|
|
pullAlgorithm,
|
|
cancelAlgorithm,
|
|
0,
|
|
undefined,
|
|
);
|
|
return stream;
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStream} stream
|
|
* @returns {void}
|
|
*/
|
|
function initializeReadableStream(stream) {
|
|
stream[_state] = "readable";
|
|
stream[_reader] = stream[_storedError] = undefined;
|
|
stream[_disturbed] = false;
|
|
}
|
|
|
|
/**
|
|
* @template I
|
|
* @template O
|
|
* @param {TransformStream<I, O>} stream
|
|
* @param {Deferred<void>} startPromise
|
|
* @param {number} writableHighWaterMark
|
|
* @param {(chunk: I) => number} writableSizeAlgorithm
|
|
* @param {number} readableHighWaterMark
|
|
* @param {(chunk: O) => number} readableSizeAlgorithm
|
|
*/
|
|
function initializeTransformStream(
|
|
stream,
|
|
startPromise,
|
|
writableHighWaterMark,
|
|
writableSizeAlgorithm,
|
|
readableHighWaterMark,
|
|
readableSizeAlgorithm,
|
|
) {
|
|
function startAlgorithm() {
|
|
return startPromise.promise;
|
|
}
|
|
|
|
function writeAlgorithm(chunk) {
|
|
return transformStreamDefaultSinkWriteAlgorithm(stream, chunk);
|
|
}
|
|
|
|
function abortAlgorithm(reason) {
|
|
return transformStreamDefaultSinkAbortAlgorithm(stream, reason);
|
|
}
|
|
|
|
function closeAlgorithm() {
|
|
return transformStreamDefaultSinkCloseAlgorithm(stream);
|
|
}
|
|
|
|
stream[_writable] = createWritableStream(
|
|
startAlgorithm,
|
|
writeAlgorithm,
|
|
closeAlgorithm,
|
|
abortAlgorithm,
|
|
writableHighWaterMark,
|
|
writableSizeAlgorithm,
|
|
);
|
|
|
|
function pullAlgorithm() {
|
|
return transformStreamDefaultSourcePullAlgorithm(stream);
|
|
}
|
|
|
|
function cancelAlgorithm(reason) {
|
|
transformStreamErrorWritableAndUnblockWrite(stream, reason);
|
|
return resolvePromiseWith(undefined);
|
|
}
|
|
|
|
stream[_readable] = createReadableStream(
|
|
startAlgorithm,
|
|
pullAlgorithm,
|
|
cancelAlgorithm,
|
|
readableHighWaterMark,
|
|
readableSizeAlgorithm,
|
|
);
|
|
|
|
stream[_backpressure] = stream[_backpressureChangePromise] = undefined;
|
|
transformStreamSetBackpressure(stream, true);
|
|
stream[_controller] = undefined;
|
|
}
|
|
|
|
/** @param {WritableStream} stream */
|
|
function initializeWritableStream(stream) {
|
|
stream[_state] = "writable";
|
|
stream[_storedError] =
|
|
stream[_writer] =
|
|
stream[_controller] =
|
|
stream[_inFlightWriteRequest] =
|
|
stream[_closeRequest] =
|
|
stream[_inFlightCloseRequest] =
|
|
stream[_pendingAbortRequest] =
|
|
undefined;
|
|
stream[_writeRequests] = [];
|
|
stream[_backpressure] = false;
|
|
}
|
|
|
|
/**
|
|
* @param {unknown} v
|
|
* @returns {v is number}
|
|
*/
|
|
function isNonNegativeNumber(v) {
|
|
if (typeof v !== "number") {
|
|
return false;
|
|
}
|
|
if (NumberIsNaN(v)) {
|
|
return false;
|
|
}
|
|
if (v < 0) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @param {unknown} value
|
|
* @returns {value is ReadableStream}
|
|
*/
|
|
function isReadableStream(value) {
|
|
return !(typeof value !== "object" || value === null ||
|
|
!ReflectHas(value, _controller));
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStream} stream
|
|
* @returns {boolean}
|
|
*/
|
|
function isReadableStreamLocked(stream) {
|
|
if (stream[_reader] === undefined) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @param {unknown} value
|
|
* @returns {value is ReadableStreamDefaultReader}
|
|
*/
|
|
function isReadableStreamDefaultReader(value) {
|
|
return !(typeof value !== "object" || value === null ||
|
|
!ReflectHas(value, _readRequests));
|
|
}
|
|
|
|
/**
|
|
* @param {unknown} value
|
|
* @returns {value is ReadableStreamBYOBReader}
|
|
*/
|
|
function isReadableStreamBYOBReader(value) {
|
|
return !(typeof value !== "object" || value === null ||
|
|
!ReflectHas(value, _readIntoRequests));
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStream} stream
|
|
* @returns {boolean}
|
|
*/
|
|
function isReadableStreamDisturbed(stream) {
|
|
assert(isReadableStream(stream));
|
|
return stream[_disturbed];
|
|
}
|
|
|
|
const DEFAULT_CHUNK_SIZE = 64 * 1024; // 64 KiB
|
|
|
|
// A finalization registry to clean up underlying resources that are GC'ed.
|
|
const RESOURCE_REGISTRY = new SafeFinalizationRegistry((rid) => {
|
|
core.tryClose(rid);
|
|
});
|
|
|
|
const _readAll = Symbol("[[readAll]]");
|
|
const _original = Symbol("[[original]]");
|
|
/**
|
|
* Create a new ReadableStream object that is backed by a Resource that
|
|
* implements `Resource::read_return`. This object contains enough metadata to
|
|
* allow callers to bypass the JavaScript ReadableStream implementation and
|
|
* read directly from the underlying resource if they so choose (FastStream).
|
|
*
|
|
* @param {number} rid The resource ID to read from.
|
|
* @param {boolean=} autoClose If the resource should be auto-closed when the stream closes. Defaults to true.
|
|
* @returns {ReadableStream<Uint8Array>}
|
|
*/
|
|
function readableStreamForRid(rid, autoClose = true) {
|
|
const stream = webidl.createBranded(ReadableStream);
|
|
stream[_resourceBacking] = { rid, autoClose };
|
|
|
|
const tryClose = () => {
|
|
if (!autoClose) return;
|
|
RESOURCE_REGISTRY.unregister(stream);
|
|
core.tryClose(rid);
|
|
};
|
|
|
|
if (autoClose) {
|
|
RESOURCE_REGISTRY.register(stream, rid, stream);
|
|
}
|
|
|
|
const underlyingSource = {
|
|
type: "bytes",
|
|
async pull(controller) {
|
|
const v = controller.byobRequest.view;
|
|
try {
|
|
if (controller[_readAll] === true) {
|
|
// fast path for tee'd streams consuming body
|
|
const chunk = await core.readAll(rid);
|
|
if (TypedArrayPrototypeGetByteLength(chunk) > 0) {
|
|
controller.enqueue(chunk);
|
|
}
|
|
controller.close();
|
|
tryClose();
|
|
return;
|
|
}
|
|
|
|
const bytesRead = await core.read(rid, v);
|
|
if (bytesRead === 0) {
|
|
tryClose();
|
|
controller.close();
|
|
controller.byobRequest.respond(0);
|
|
} else {
|
|
controller.byobRequest.respond(bytesRead);
|
|
}
|
|
} catch (e) {
|
|
controller.error(e);
|
|
tryClose();
|
|
}
|
|
},
|
|
cancel() {
|
|
tryClose();
|
|
},
|
|
autoAllocateChunkSize: DEFAULT_CHUNK_SIZE,
|
|
};
|
|
initializeReadableStream(stream);
|
|
setUpReadableByteStreamControllerFromUnderlyingSource(
|
|
stream,
|
|
underlyingSource,
|
|
underlyingSource,
|
|
0,
|
|
);
|
|
return stream;
|
|
}
|
|
|
|
const promiseIdSymbol = SymbolFor("Deno.core.internalPromiseId");
|
|
const _isUnref = Symbol("isUnref");
|
|
/**
|
|
* Create a new ReadableStream object that is backed by a Resource that
|
|
* implements `Resource::read_return`. This readable stream supports being
|
|
* refed and unrefed by calling `readableStreamForRidUnrefableRef` and
|
|
* `readableStreamForRidUnrefableUnref` on it. Unrefable streams are not
|
|
* FastStream compatible.
|
|
*
|
|
* @param {number} rid The resource ID to read from.
|
|
* @returns {ReadableStream<Uint8Array>}
|
|
*/
|
|
function readableStreamForRidUnrefable(rid) {
|
|
const stream = webidl.createBranded(ReadableStream);
|
|
stream[promiseIdSymbol] = undefined;
|
|
stream[_isUnref] = false;
|
|
stream[_resourceBackingUnrefable] = { rid, autoClose: true };
|
|
const underlyingSource = {
|
|
type: "bytes",
|
|
async pull(controller) {
|
|
const v = controller.byobRequest.view;
|
|
try {
|
|
const promise = core.read(rid, v);
|
|
const promiseId = stream[promiseIdSymbol] = promise[promiseIdSymbol];
|
|
if (stream[_isUnref]) core.unrefOp(promiseId);
|
|
const bytesRead = await promise;
|
|
stream[promiseIdSymbol] = undefined;
|
|
if (bytesRead === 0) {
|
|
core.tryClose(rid);
|
|
controller.close();
|
|
controller.byobRequest.respond(0);
|
|
} else {
|
|
controller.byobRequest.respond(bytesRead);
|
|
}
|
|
} catch (e) {
|
|
controller.error(e);
|
|
core.tryClose(rid);
|
|
}
|
|
},
|
|
cancel() {
|
|
core.tryClose(rid);
|
|
},
|
|
autoAllocateChunkSize: DEFAULT_CHUNK_SIZE,
|
|
};
|
|
initializeReadableStream(stream);
|
|
setUpReadableByteStreamControllerFromUnderlyingSource(
|
|
stream,
|
|
underlyingSource,
|
|
underlyingSource,
|
|
0,
|
|
);
|
|
return stream;
|
|
}
|
|
|
|
function readableStreamIsUnrefable(stream) {
|
|
return ReflectHas(stream, _isUnref);
|
|
}
|
|
|
|
function readableStreamForRidUnrefableRef(stream) {
|
|
if (!readableStreamIsUnrefable(stream)) {
|
|
throw new TypeError("Not an unrefable stream");
|
|
}
|
|
stream[_isUnref] = false;
|
|
if (stream[promiseIdSymbol] !== undefined) {
|
|
core.refOp(stream[promiseIdSymbol]);
|
|
}
|
|
}
|
|
|
|
function readableStreamForRidUnrefableUnref(stream) {
|
|
if (!readableStreamIsUnrefable(stream)) {
|
|
throw new TypeError("Not an unrefable stream");
|
|
}
|
|
stream[_isUnref] = true;
|
|
if (stream[promiseIdSymbol] !== undefined) {
|
|
core.unrefOp(stream[promiseIdSymbol]);
|
|
}
|
|
}
|
|
|
|
function getReadableStreamResourceBacking(stream) {
|
|
return stream[_resourceBacking];
|
|
}
|
|
|
|
function getReadableStreamResourceBackingUnrefable(stream) {
|
|
return stream[_resourceBackingUnrefable];
|
|
}
|
|
|
|
async function readableStreamCollectIntoUint8Array(stream) {
|
|
const resourceBacking = getReadableStreamResourceBacking(stream) ||
|
|
getReadableStreamResourceBackingUnrefable(stream);
|
|
const reader = acquireReadableStreamDefaultReader(stream);
|
|
|
|
if (resourceBacking) {
|
|
// fast path, read whole body in a single op call
|
|
try {
|
|
readableStreamDisturb(stream);
|
|
const promise = core.opAsync("op_read_all", resourceBacking.rid);
|
|
if (readableStreamIsUnrefable(stream)) {
|
|
const promiseId = stream[promiseIdSymbol] = promise[promiseIdSymbol];
|
|
if (stream[_isUnref]) core.unrefOp(promiseId);
|
|
}
|
|
const buf = await promise;
|
|
readableStreamThrowIfErrored(stream);
|
|
readableStreamClose(stream);
|
|
return buf;
|
|
} catch (err) {
|
|
readableStreamThrowIfErrored(stream);
|
|
readableStreamError(stream, err);
|
|
throw err;
|
|
} finally {
|
|
if (resourceBacking.autoClose) {
|
|
core.tryClose(resourceBacking.rid);
|
|
}
|
|
}
|
|
}
|
|
|
|
// slow path
|
|
/** @type {Uint8Array[]} */
|
|
const chunks = [];
|
|
let totalLength = 0;
|
|
|
|
// tee'd stream
|
|
if (stream[_original]) {
|
|
// One of the branches is consuming the stream
|
|
// signal controller.pull that we can consume it in a single op
|
|
stream[_original][_controller][_readAll] = true;
|
|
}
|
|
|
|
while (true) {
|
|
const { value: chunk, done } = await reader.read();
|
|
|
|
if (done) break;
|
|
|
|
if (TypedArrayPrototypeGetSymbolToStringTag(chunk) !== "Uint8Array") {
|
|
throw new TypeError(
|
|
"Can't convert value to Uint8Array while consuming the stream",
|
|
);
|
|
}
|
|
|
|
ArrayPrototypePush(chunks, chunk);
|
|
totalLength += TypedArrayPrototypeGetByteLength(chunk);
|
|
}
|
|
|
|
const finalBuffer = new Uint8Array(totalLength);
|
|
let offset = 0;
|
|
for (let i = 0; i < chunks.length; ++i) {
|
|
const chunk = chunks[i];
|
|
TypedArrayPrototypeSet(finalBuffer, chunk, offset);
|
|
offset += TypedArrayPrototypeGetByteLength(chunk);
|
|
}
|
|
return finalBuffer;
|
|
}
|
|
|
|
/**
|
|
* Create a new Writable object that is backed by a Resource that implements
|
|
* `Resource::write` / `Resource::write_all`. This object contains enough
|
|
* metadata to allow callers to bypass the JavaScript WritableStream
|
|
* implementation and write directly to the underlying resource if they so
|
|
* choose (FastStream).
|
|
*
|
|
* @param {number} rid The resource ID to write to.
|
|
* @param {boolean=} autoClose If the resource should be auto-closed when the stream closes. Defaults to true.
|
|
* @returns {ReadableStream<Uint8Array>}
|
|
*/
|
|
function writableStreamForRid(rid, autoClose = true) {
|
|
const stream = webidl.createBranded(WritableStream);
|
|
stream[_resourceBacking] = { rid, autoClose };
|
|
|
|
const tryClose = () => {
|
|
if (!autoClose) return;
|
|
RESOURCE_REGISTRY.unregister(stream);
|
|
core.tryClose(rid);
|
|
};
|
|
|
|
if (autoClose) {
|
|
RESOURCE_REGISTRY.register(stream, rid, stream);
|
|
}
|
|
|
|
const underlyingSink = {
|
|
async write(chunk, controller) {
|
|
try {
|
|
await core.writeAll(rid, chunk);
|
|
} catch (e) {
|
|
controller.error(e);
|
|
tryClose();
|
|
}
|
|
},
|
|
close() {
|
|
tryClose();
|
|
},
|
|
abort() {
|
|
tryClose();
|
|
},
|
|
};
|
|
initializeWritableStream(stream);
|
|
setUpWritableStreamDefaultControllerFromUnderlyingSink(
|
|
stream,
|
|
underlyingSink,
|
|
underlyingSink,
|
|
1,
|
|
() => 1,
|
|
);
|
|
return stream;
|
|
}
|
|
|
|
function getWritableStreamResourceBacking(stream) {
|
|
return stream[_resourceBacking];
|
|
}
|
|
|
|
/*
|
|
* @param {ReadableStream} stream
|
|
*/
|
|
function readableStreamThrowIfErrored(stream) {
|
|
if (stream[_state] === "errored") {
|
|
throw stream[_storedError];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {unknown} value
|
|
* @returns {value is WritableStream}
|
|
*/
|
|
function isWritableStream(value) {
|
|
return !(typeof value !== "object" || value === null ||
|
|
!ReflectHas(value, _controller));
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStream} stream
|
|
* @returns {boolean}
|
|
*/
|
|
function isWritableStreamLocked(stream) {
|
|
if (stream[_writer] === undefined) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
/**
|
|
* @template T
|
|
* @param {{ [_queue]: Array<ValueWithSize<T | _close>>, [_queueTotalSize]: number }} container
|
|
* @returns {T | _close}
|
|
*/
|
|
function peekQueueValue(container) {
|
|
assert(
|
|
ReflectHas(container, _queue) &&
|
|
ReflectHas(container, _queueTotalSize),
|
|
);
|
|
assert(container[_queue].length);
|
|
const valueWithSize = container[_queue][0];
|
|
return valueWithSize.value;
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @returns {void}
|
|
*/
|
|
function readableByteStreamControllerCallPullIfNeeded(controller) {
|
|
const shouldPull = readableByteStreamControllerShouldCallPull(controller);
|
|
if (!shouldPull) {
|
|
return;
|
|
}
|
|
if (controller[_pulling]) {
|
|
controller[_pullAgain] = true;
|
|
return;
|
|
}
|
|
assert(controller[_pullAgain] === false);
|
|
controller[_pulling] = true;
|
|
/** @type {Promise<void>} */
|
|
const pullPromise = controller[_pullAlgorithm](controller);
|
|
setPromiseIsHandledToTrue(
|
|
PromisePrototypeThen(
|
|
pullPromise,
|
|
() => {
|
|
controller[_pulling] = false;
|
|
if (controller[_pullAgain]) {
|
|
controller[_pullAgain] = false;
|
|
readableByteStreamControllerCallPullIfNeeded(controller);
|
|
}
|
|
},
|
|
(e) => {
|
|
readableByteStreamControllerError(controller, e);
|
|
},
|
|
),
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @returns {void}
|
|
*/
|
|
function readableByteStreamControllerClearAlgorithms(controller) {
|
|
controller[_pullAlgorithm] = undefined;
|
|
controller[_cancelAlgorithm] = undefined;
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @param {any} e
|
|
*/
|
|
function readableByteStreamControllerError(controller, e) {
|
|
/** @type {ReadableStream<ArrayBuffer>} */
|
|
const stream = controller[_stream];
|
|
if (stream[_state] !== "readable") {
|
|
return;
|
|
}
|
|
readableByteStreamControllerClearPendingPullIntos(controller);
|
|
resetQueue(controller);
|
|
readableByteStreamControllerClearAlgorithms(controller);
|
|
readableStreamError(stream, e);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @returns {void}
|
|
*/
|
|
function readableByteStreamControllerClearPendingPullIntos(controller) {
|
|
readableByteStreamControllerInvalidateBYOBRequest(controller);
|
|
controller[_pendingPullIntos] = [];
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @returns {void}
|
|
*/
|
|
function readableByteStreamControllerClose(controller) {
|
|
/** @type {ReadableStream<ArrayBuffer>} */
|
|
const stream = controller[_stream];
|
|
if (controller[_closeRequested] || stream[_state] !== "readable") {
|
|
return;
|
|
}
|
|
if (controller[_queueTotalSize] > 0) {
|
|
controller[_closeRequested] = true;
|
|
return;
|
|
}
|
|
if (controller[_pendingPullIntos].length !== 0) {
|
|
const firstPendingPullInto = controller[_pendingPullIntos][0];
|
|
if (firstPendingPullInto.bytesFilled > 0) {
|
|
const e = new TypeError(
|
|
"Insufficient bytes to fill elements in the given buffer",
|
|
);
|
|
readableByteStreamControllerError(controller, e);
|
|
throw e;
|
|
}
|
|
}
|
|
readableByteStreamControllerClearAlgorithms(controller);
|
|
readableStreamClose(stream);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @param {ArrayBufferView} chunk
|
|
*/
|
|
function readableByteStreamControllerEnqueue(controller, chunk) {
|
|
/** @type {ReadableStream<ArrayBuffer>} */
|
|
const stream = controller[_stream];
|
|
if (
|
|
controller[_closeRequested] ||
|
|
controller[_stream][_state] !== "readable"
|
|
) {
|
|
return;
|
|
}
|
|
|
|
let buffer, byteLength, byteOffset;
|
|
if (TypedArrayPrototypeGetSymbolToStringTag(chunk) === undefined) {
|
|
buffer = DataViewPrototypeGetBuffer(/** @type {DataView} */ (chunk));
|
|
byteLength = DataViewPrototypeGetByteLength(
|
|
/** @type {DataView} */ (chunk),
|
|
);
|
|
byteOffset = DataViewPrototypeGetByteOffset(
|
|
/** @type {DataView} */ (chunk),
|
|
);
|
|
} else {
|
|
buffer = TypedArrayPrototypeGetBuffer(/** @type {Uint8Array}} */ (chunk));
|
|
byteLength = TypedArrayPrototypeGetByteLength(
|
|
/** @type {Uint8Array} */ (chunk),
|
|
);
|
|
byteOffset = TypedArrayPrototypeGetByteOffset(
|
|
/** @type {Uint8Array} */ (chunk),
|
|
);
|
|
}
|
|
|
|
if (isDetachedBuffer(buffer)) {
|
|
throw new TypeError(
|
|
"chunk's buffer is detached and so cannot be enqueued",
|
|
);
|
|
}
|
|
const transferredBuffer = transferArrayBuffer(buffer);
|
|
if (controller[_pendingPullIntos].length !== 0) {
|
|
const firstPendingPullInto = controller[_pendingPullIntos][0];
|
|
// deno-lint-ignore prefer-primordials
|
|
if (isDetachedBuffer(firstPendingPullInto.buffer)) {
|
|
throw new TypeError(
|
|
"The BYOB request's buffer has been detached and so cannot be filled with an enqueued chunk",
|
|
);
|
|
}
|
|
readableByteStreamControllerInvalidateBYOBRequest(controller);
|
|
firstPendingPullInto.buffer = transferArrayBuffer(
|
|
// deno-lint-ignore prefer-primordials
|
|
firstPendingPullInto.buffer,
|
|
);
|
|
if (firstPendingPullInto.readerType === "none") {
|
|
readableByteStreamControllerEnqueueDetachedPullIntoToQueue(
|
|
controller,
|
|
firstPendingPullInto,
|
|
);
|
|
}
|
|
}
|
|
if (readableStreamHasDefaultReader(stream)) {
|
|
readableByteStreamControllerProcessReadRequestsUsingQueue(controller);
|
|
if (readableStreamGetNumReadRequests(stream) === 0) {
|
|
assert(controller[_pendingPullIntos].length === 0);
|
|
readableByteStreamControllerEnqueueChunkToQueue(
|
|
controller,
|
|
transferredBuffer,
|
|
byteOffset,
|
|
byteLength,
|
|
);
|
|
} else {
|
|
assert(controller[_queue].length === 0);
|
|
if (controller[_pendingPullIntos].length !== 0) {
|
|
assert(controller[_pendingPullIntos][0].readerType === "default");
|
|
readableByteStreamControllerShiftPendingPullInto(controller);
|
|
}
|
|
const transferredView = new Uint8Array(
|
|
transferredBuffer,
|
|
byteOffset,
|
|
byteLength,
|
|
);
|
|
readableStreamFulfillReadRequest(stream, transferredView, false);
|
|
}
|
|
} else if (readableStreamHasBYOBReader(stream)) {
|
|
readableByteStreamControllerEnqueueChunkToQueue(
|
|
controller,
|
|
transferredBuffer,
|
|
byteOffset,
|
|
byteLength,
|
|
);
|
|
readableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(
|
|
controller,
|
|
);
|
|
} else {
|
|
assert(isReadableStreamLocked(stream) === false);
|
|
readableByteStreamControllerEnqueueChunkToQueue(
|
|
controller,
|
|
transferredBuffer,
|
|
byteOffset,
|
|
byteLength,
|
|
);
|
|
}
|
|
readableByteStreamControllerCallPullIfNeeded(controller);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @param {ArrayBufferLike} buffer
|
|
* @param {number} byteOffset
|
|
* @param {number} byteLength
|
|
* @returns {void}
|
|
*/
|
|
function readableByteStreamControllerEnqueueChunkToQueue(
|
|
controller,
|
|
buffer,
|
|
byteOffset,
|
|
byteLength,
|
|
) {
|
|
ArrayPrototypePush(controller[_queue], { buffer, byteOffset, byteLength });
|
|
controller[_queueTotalSize] += byteLength;
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @param {ArrayBufferLike} buffer
|
|
* @param {number} byteOffset
|
|
* @param {number} byteLength
|
|
* @returns {void}
|
|
*/
|
|
function readableByteStreamControllerEnqueueClonedChunkToQueue(
|
|
controller,
|
|
buffer,
|
|
byteOffset,
|
|
byteLength,
|
|
) {
|
|
let cloneResult;
|
|
try {
|
|
if (ObjectPrototypeIsPrototypeOf(ArrayBufferPrototype, buffer)) {
|
|
cloneResult = ArrayBufferPrototypeSlice(
|
|
buffer,
|
|
byteOffset,
|
|
byteOffset + byteLength,
|
|
);
|
|
} else {
|
|
// TODO(lucacasonato): add SharedArrayBuffer to primordials
|
|
cloneResult = buffer.slice(byteOffset, byteOffset + byteLength);
|
|
}
|
|
} catch (e) {
|
|
readableByteStreamControllerError(controller, e);
|
|
}
|
|
readableByteStreamControllerEnqueueChunkToQueue(
|
|
controller,
|
|
cloneResult,
|
|
0,
|
|
byteLength,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @param {PullIntoDescriptor} pullIntoDescriptor
|
|
* @returns {void}
|
|
*/
|
|
function readableByteStreamControllerEnqueueDetachedPullIntoToQueue(
|
|
controller,
|
|
pullIntoDescriptor,
|
|
) {
|
|
assert(pullIntoDescriptor.readerType === "none");
|
|
if (pullIntoDescriptor.bytesFilled > 0) {
|
|
readableByteStreamControllerEnqueueClonedChunkToQueue(
|
|
controller,
|
|
// deno-lint-ignore prefer-primordials
|
|
pullIntoDescriptor.buffer,
|
|
// deno-lint-ignore prefer-primordials
|
|
pullIntoDescriptor.byteOffset,
|
|
pullIntoDescriptor.bytesFilled,
|
|
);
|
|
}
|
|
readableByteStreamControllerShiftPendingPullInto(controller);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @returns {ReadableStreamBYOBRequest | null}
|
|
*/
|
|
function readableByteStreamControllerGetBYOBRequest(controller) {
|
|
if (
|
|
controller[_byobRequest] === null &&
|
|
controller[_pendingPullIntos].length !== 0
|
|
) {
|
|
const firstDescriptor = controller[_pendingPullIntos][0];
|
|
const view = new Uint8Array(
|
|
// deno-lint-ignore prefer-primordials
|
|
firstDescriptor.buffer,
|
|
// deno-lint-ignore prefer-primordials
|
|
firstDescriptor.byteOffset + firstDescriptor.bytesFilled,
|
|
// deno-lint-ignore prefer-primordials
|
|
firstDescriptor.byteLength - firstDescriptor.bytesFilled,
|
|
);
|
|
const byobRequest = webidl.createBranded(ReadableStreamBYOBRequest);
|
|
byobRequest[_controller] = controller;
|
|
byobRequest[_view] = view;
|
|
controller[_byobRequest] = byobRequest;
|
|
}
|
|
return controller[_byobRequest];
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @returns {number | null}
|
|
*/
|
|
function readableByteStreamControllerGetDesiredSize(controller) {
|
|
const state = controller[_stream][_state];
|
|
if (state === "errored") {
|
|
return null;
|
|
}
|
|
if (state === "closed") {
|
|
return 0;
|
|
}
|
|
return controller[_strategyHWM] - controller[_queueTotalSize];
|
|
}
|
|
|
|
/**
|
|
* @param {{ [_queue]: any[], [_queueTotalSize]: number }} container
|
|
* @returns {void}
|
|
*/
|
|
function resetQueue(container) {
|
|
container[_queue] = [];
|
|
container[_queueTotalSize] = 0;
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @returns {void}
|
|
*/
|
|
function readableByteStreamControllerHandleQueueDrain(controller) {
|
|
assert(controller[_stream][_state] === "readable");
|
|
if (
|
|
controller[_queueTotalSize] === 0 && controller[_closeRequested]
|
|
) {
|
|
readableByteStreamControllerClearAlgorithms(controller);
|
|
readableStreamClose(controller[_stream]);
|
|
} else {
|
|
readableByteStreamControllerCallPullIfNeeded(controller);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @returns {boolean}
|
|
*/
|
|
function readableByteStreamControllerShouldCallPull(controller) {
|
|
/** @type {ReadableStream<ArrayBuffer>} */
|
|
const stream = controller[_stream];
|
|
if (
|
|
stream[_state] !== "readable" ||
|
|
controller[_closeRequested] ||
|
|
!controller[_started]
|
|
) {
|
|
return false;
|
|
}
|
|
if (
|
|
readableStreamHasDefaultReader(stream) &&
|
|
readableStreamGetNumReadRequests(stream) > 0
|
|
) {
|
|
return true;
|
|
}
|
|
if (
|
|
readableStreamHasBYOBReader(stream) &&
|
|
readableStreamGetNumReadIntoRequests(stream) > 0
|
|
) {
|
|
return true;
|
|
}
|
|
const desiredSize = readableByteStreamControllerGetDesiredSize(controller);
|
|
assert(desiredSize !== null);
|
|
return desiredSize > 0;
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStream<R>} stream
|
|
* @param {ReadRequest<R>} readRequest
|
|
* @returns {void}
|
|
*/
|
|
function readableStreamAddReadRequest(stream, readRequest) {
|
|
assert(isReadableStreamDefaultReader(stream[_reader]));
|
|
assert(stream[_state] === "readable");
|
|
ArrayPrototypePush(stream[_reader][_readRequests], readRequest);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStream} stream
|
|
* @param {ReadIntoRequest} readRequest
|
|
* @returns {void}
|
|
*/
|
|
function readableStreamAddReadIntoRequest(stream, readRequest) {
|
|
assert(isReadableStreamBYOBReader(stream[_reader]));
|
|
assert(stream[_state] === "readable" || stream[_state] === "closed");
|
|
ArrayPrototypePush(stream[_reader][_readIntoRequests], readRequest);
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStream<R>} stream
|
|
* @param {any=} reason
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function readableStreamCancel(stream, reason) {
|
|
stream[_disturbed] = true;
|
|
if (stream[_state] === "closed") {
|
|
return resolvePromiseWith(undefined);
|
|
}
|
|
if (stream[_state] === "errored") {
|
|
return PromiseReject(stream[_storedError]);
|
|
}
|
|
readableStreamClose(stream);
|
|
const reader = stream[_reader];
|
|
if (reader !== undefined && isReadableStreamBYOBReader(reader)) {
|
|
const readIntoRequests = reader[_readIntoRequests];
|
|
reader[_readIntoRequests] = [];
|
|
for (let i = 0; i < readIntoRequests.length; ++i) {
|
|
const readIntoRequest = readIntoRequests[i];
|
|
readIntoRequest.closeSteps(undefined);
|
|
}
|
|
}
|
|
/** @type {Promise<void>} */
|
|
const sourceCancelPromise = stream[_controller][_cancelSteps](reason);
|
|
return PromisePrototypeThen(sourceCancelPromise, () => undefined);
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStream<R>} stream
|
|
* @returns {void}
|
|
*/
|
|
function readableStreamClose(stream) {
|
|
assert(stream[_state] === "readable");
|
|
stream[_state] = "closed";
|
|
/** @type {ReadableStreamDefaultReader<R> | undefined} */
|
|
const reader = stream[_reader];
|
|
if (!reader) {
|
|
return;
|
|
}
|
|
if (isReadableStreamDefaultReader(reader)) {
|
|
/** @type {Array<ReadRequest<R>>} */
|
|
const readRequests = reader[_readRequests];
|
|
reader[_readRequests] = [];
|
|
for (let i = 0; i < readRequests.length; ++i) {
|
|
const readRequest = readRequests[i];
|
|
readRequest.closeSteps();
|
|
}
|
|
}
|
|
// This promise can be double resolved.
|
|
// See: https://github.com/whatwg/streams/issues/1100
|
|
reader[_closedPromise].resolve(undefined);
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStream<R>} stream
|
|
* @returns {void}
|
|
*/
|
|
function readableStreamDisturb(stream) {
|
|
stream[_disturbed] = true;
|
|
}
|
|
|
|
/** @param {ReadableStreamDefaultController<any>} controller */
|
|
function readableStreamDefaultControllerCallPullIfNeeded(controller) {
|
|
const shouldPull = readableStreamDefaultcontrollerShouldCallPull(
|
|
controller,
|
|
);
|
|
if (shouldPull === false) {
|
|
return;
|
|
}
|
|
if (controller[_pulling] === true) {
|
|
controller[_pullAgain] = true;
|
|
return;
|
|
}
|
|
assert(controller[_pullAgain] === false);
|
|
controller[_pulling] = true;
|
|
const pullPromise = controller[_pullAlgorithm](controller);
|
|
uponFulfillment(pullPromise, () => {
|
|
controller[_pulling] = false;
|
|
if (controller[_pullAgain] === true) {
|
|
controller[_pullAgain] = false;
|
|
readableStreamDefaultControllerCallPullIfNeeded(controller);
|
|
}
|
|
});
|
|
uponRejection(pullPromise, (e) => {
|
|
readableStreamDefaultControllerError(controller, e);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStreamDefaultController<any>} controller
|
|
* @returns {boolean}
|
|
*/
|
|
function readableStreamDefaultControllerCanCloseOrEnqueue(controller) {
|
|
const state = controller[_stream][_state];
|
|
if (controller[_closeRequested] === false && state === "readable") {
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/** @param {ReadableStreamDefaultController<any>} controller */
|
|
function readableStreamDefaultControllerClearAlgorithms(controller) {
|
|
controller[_pullAlgorithm] = undefined;
|
|
controller[_cancelAlgorithm] = undefined;
|
|
controller[_strategySizeAlgorithm] = undefined;
|
|
}
|
|
|
|
/** @param {ReadableStreamDefaultController<any>} controller */
|
|
function readableStreamDefaultControllerClose(controller) {
|
|
if (
|
|
readableStreamDefaultControllerCanCloseOrEnqueue(controller) === false
|
|
) {
|
|
return;
|
|
}
|
|
const stream = controller[_stream];
|
|
controller[_closeRequested] = true;
|
|
if (controller[_queue].length === 0) {
|
|
readableStreamDefaultControllerClearAlgorithms(controller);
|
|
readableStreamClose(stream);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStreamDefaultController<R>} controller
|
|
* @param {R} chunk
|
|
* @returns {void}
|
|
*/
|
|
function readableStreamDefaultControllerEnqueue(controller, chunk) {
|
|
if (
|
|
readableStreamDefaultControllerCanCloseOrEnqueue(controller) === false
|
|
) {
|
|
return;
|
|
}
|
|
const stream = controller[_stream];
|
|
if (
|
|
isReadableStreamLocked(stream) === true &&
|
|
readableStreamGetNumReadRequests(stream) > 0
|
|
) {
|
|
readableStreamFulfillReadRequest(stream, chunk, false);
|
|
} else {
|
|
let chunkSize;
|
|
try {
|
|
chunkSize = controller[_strategySizeAlgorithm](chunk);
|
|
} catch (e) {
|
|
readableStreamDefaultControllerError(controller, e);
|
|
throw e;
|
|
}
|
|
|
|
try {
|
|
enqueueValueWithSize(controller, chunk, chunkSize);
|
|
} catch (e) {
|
|
readableStreamDefaultControllerError(controller, e);
|
|
throw e;
|
|
}
|
|
}
|
|
readableStreamDefaultControllerCallPullIfNeeded(controller);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStreamDefaultController<any>} controller
|
|
* @param {any} e
|
|
*/
|
|
function readableStreamDefaultControllerError(controller, e) {
|
|
const stream = controller[_stream];
|
|
if (stream[_state] !== "readable") {
|
|
return;
|
|
}
|
|
resetQueue(controller);
|
|
readableStreamDefaultControllerClearAlgorithms(controller);
|
|
readableStreamError(stream, e);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStreamDefaultController<any>} controller
|
|
* @returns {number | null}
|
|
*/
|
|
function readableStreamDefaultControllerGetDesiredSize(controller) {
|
|
const state = controller[_stream][_state];
|
|
if (state === "errored") {
|
|
return null;
|
|
}
|
|
if (state === "closed") {
|
|
return 0;
|
|
}
|
|
return controller[_strategyHWM] - controller[_queueTotalSize];
|
|
}
|
|
|
|
/** @param {ReadableStreamDefaultController} controller */
|
|
function readableStreamDefaultcontrollerHasBackpressure(controller) {
|
|
if (readableStreamDefaultcontrollerShouldCallPull(controller) === true) {
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStreamDefaultController<any>} controller
|
|
* @returns {boolean}
|
|
*/
|
|
function readableStreamDefaultcontrollerShouldCallPull(controller) {
|
|
const stream = controller[_stream];
|
|
if (
|
|
readableStreamDefaultControllerCanCloseOrEnqueue(controller) === false
|
|
) {
|
|
return false;
|
|
}
|
|
if (controller[_started] === false) {
|
|
return false;
|
|
}
|
|
if (
|
|
isReadableStreamLocked(stream) &&
|
|
readableStreamGetNumReadRequests(stream) > 0
|
|
) {
|
|
return true;
|
|
}
|
|
const desiredSize = readableStreamDefaultControllerGetDesiredSize(
|
|
controller,
|
|
);
|
|
assert(desiredSize !== null);
|
|
if (desiredSize > 0) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStreamBYOBReader} reader
|
|
* @param {ArrayBufferView} view
|
|
* @param {ReadIntoRequest} readIntoRequest
|
|
* @returns {void}
|
|
*/
|
|
function readableStreamBYOBReaderRead(reader, view, readIntoRequest) {
|
|
const stream = reader[_stream];
|
|
assert(stream);
|
|
stream[_disturbed] = true;
|
|
if (stream[_state] === "errored") {
|
|
readIntoRequest.errorSteps(stream[_storedError]);
|
|
} else {
|
|
readableByteStreamControllerPullInto(
|
|
stream[_controller],
|
|
view,
|
|
readIntoRequest,
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStreamBYOBReader} reader
|
|
*/
|
|
function readableStreamBYOBReaderRelease(reader) {
|
|
readableStreamReaderGenericRelease(reader);
|
|
const e = new TypeError("The reader was released.");
|
|
readableStreamBYOBReaderErrorReadIntoRequests(reader, e);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStreamBYOBReader} reader
|
|
* @param {any} e
|
|
*/
|
|
function readableStreamDefaultReaderErrorReadRequests(reader, e) {
|
|
const readRequests = reader[_readRequests];
|
|
reader[_readRequests] = [];
|
|
for (let i = 0; i < readRequests.length; ++i) {
|
|
const readRequest = readRequests[i];
|
|
readRequest.errorSteps(e);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
*/
|
|
function readableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(
|
|
controller,
|
|
) {
|
|
assert(!controller[_closeRequested]);
|
|
while (controller[_pendingPullIntos].length !== 0) {
|
|
if (controller[_queueTotalSize] === 0) {
|
|
return;
|
|
}
|
|
const pullIntoDescriptor = controller[_pendingPullIntos][0];
|
|
if (
|
|
readableByteStreamControllerFillPullIntoDescriptorFromQueue(
|
|
controller,
|
|
pullIntoDescriptor,
|
|
)
|
|
) {
|
|
readableByteStreamControllerShiftPendingPullInto(controller);
|
|
readableByteStreamControllerCommitPullIntoDescriptor(
|
|
controller[_stream],
|
|
pullIntoDescriptor,
|
|
);
|
|
}
|
|
}
|
|
}
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
*/
|
|
function readableByteStreamControllerProcessReadRequestsUsingQueue(
|
|
controller,
|
|
) {
|
|
const reader = controller[_stream][_reader];
|
|
assert(isReadableStreamDefaultReader(reader));
|
|
while (reader[_readRequests].length !== 0) {
|
|
if (controller[_queueTotalSize] === 0) {
|
|
return;
|
|
}
|
|
const readRequest = ArrayPrototypeShift(reader[_readRequests]);
|
|
readableByteStreamControllerFillReadRequestFromQueue(
|
|
controller,
|
|
readRequest,
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @param {ArrayBufferView} view
|
|
* @param {ReadIntoRequest} readIntoRequest
|
|
* @returns {void}
|
|
*/
|
|
function readableByteStreamControllerPullInto(
|
|
controller,
|
|
view,
|
|
readIntoRequest,
|
|
) {
|
|
const stream = controller[_stream];
|
|
|
|
let ctor;
|
|
/** @type {number} */
|
|
let elementSize;
|
|
/** @type {ArrayBufferLike} */
|
|
let buffer;
|
|
/** @type {number} */
|
|
let byteLength;
|
|
/** @type {number} */
|
|
let byteOffset;
|
|
|
|
const tag = TypedArrayPrototypeGetSymbolToStringTag(view);
|
|
if (tag === undefined) {
|
|
ctor = DataView;
|
|
elementSize = 1;
|
|
buffer = DataViewPrototypeGetBuffer(/** @type {DataView} */ (view));
|
|
byteLength = DataViewPrototypeGetByteLength(/** @type {DataView} */ (view));
|
|
byteOffset = DataViewPrototypeGetByteOffset(/** @type {DataView} */ (view));
|
|
} else {
|
|
switch (tag) {
|
|
case "Int8Array":
|
|
ctor = Int8Array;
|
|
break;
|
|
case "Uint8Array":
|
|
ctor = Uint8Array;
|
|
break;
|
|
case "Uint8ClampedArray":
|
|
ctor = Uint8ClampedArray;
|
|
break;
|
|
case "Int16Array":
|
|
ctor = Int16Array;
|
|
break;
|
|
case "Uint16Array":
|
|
ctor = Uint16Array;
|
|
break;
|
|
case "Int32Array":
|
|
ctor = Int32Array;
|
|
break;
|
|
case "Uint32Array":
|
|
ctor = Uint32Array;
|
|
break;
|
|
case "Float32Array":
|
|
ctor = Float32Array;
|
|
break;
|
|
case "Float64Array":
|
|
ctor = Float64Array;
|
|
break;
|
|
case "BigInt64Array":
|
|
ctor = BigInt64Array;
|
|
break;
|
|
case "BigUint64Array":
|
|
ctor = BigUint64Array;
|
|
break;
|
|
default:
|
|
throw new TypeError("unreachable");
|
|
}
|
|
elementSize = ctor.BYTES_PER_ELEMENT;
|
|
buffer = TypedArrayPrototypeGetBuffer(/** @type {Uint8Array} */ (view));
|
|
byteLength = TypedArrayPrototypeGetByteLength(
|
|
/** @type {Uint8Array} */ (view),
|
|
);
|
|
byteOffset = TypedArrayPrototypeGetByteOffset(
|
|
/** @type {Uint8Array} */ (view),
|
|
);
|
|
}
|
|
|
|
try {
|
|
buffer = transferArrayBuffer(buffer);
|
|
} catch (e) {
|
|
readIntoRequest.errorSteps(e);
|
|
return;
|
|
}
|
|
|
|
/** @type {PullIntoDescriptor} */
|
|
const pullIntoDescriptor = {
|
|
buffer,
|
|
bufferByteLength: getArrayBufferByteLength(buffer),
|
|
byteOffset,
|
|
byteLength,
|
|
bytesFilled: 0,
|
|
elementSize,
|
|
viewConstructor: ctor,
|
|
readerType: "byob",
|
|
};
|
|
|
|
if (controller[_pendingPullIntos].length !== 0) {
|
|
ArrayPrototypePush(controller[_pendingPullIntos], pullIntoDescriptor);
|
|
readableStreamAddReadIntoRequest(stream, readIntoRequest);
|
|
return;
|
|
}
|
|
if (stream[_state] === "closed") {
|
|
const emptyView = new ctor(
|
|
// deno-lint-ignore prefer-primordials
|
|
pullIntoDescriptor.buffer,
|
|
// deno-lint-ignore prefer-primordials
|
|
pullIntoDescriptor.byteOffset,
|
|
0,
|
|
);
|
|
readIntoRequest.closeSteps(emptyView);
|
|
return;
|
|
}
|
|
if (controller[_queueTotalSize] > 0) {
|
|
if (
|
|
readableByteStreamControllerFillPullIntoDescriptorFromQueue(
|
|
controller,
|
|
pullIntoDescriptor,
|
|
)
|
|
) {
|
|
const filledView = readableByteStreamControllerConvertPullIntoDescriptor(
|
|
pullIntoDescriptor,
|
|
);
|
|
readableByteStreamControllerHandleQueueDrain(controller);
|
|
readIntoRequest.chunkSteps(filledView);
|
|
return;
|
|
}
|
|
if (controller[_closeRequested]) {
|
|
const e = new TypeError(
|
|
"Insufficient bytes to fill elements in the given buffer",
|
|
);
|
|
readableByteStreamControllerError(controller, e);
|
|
readIntoRequest.errorSteps(e);
|
|
return;
|
|
}
|
|
}
|
|
ArrayPrototypePush(controller[_pendingPullIntos], pullIntoDescriptor);
|
|
readableStreamAddReadIntoRequest(stream, readIntoRequest);
|
|
readableByteStreamControllerCallPullIfNeeded(controller);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @param {number} bytesWritten
|
|
* @returns {void}
|
|
*/
|
|
function readableByteStreamControllerRespond(controller, bytesWritten) {
|
|
assert(controller[_pendingPullIntos].length !== 0);
|
|
const firstDescriptor = controller[_pendingPullIntos][0];
|
|
const state = controller[_stream][_state];
|
|
if (state === "closed") {
|
|
if (bytesWritten !== 0) {
|
|
throw new TypeError(
|
|
"bytesWritten must be 0 when calling respond() on a closed stream",
|
|
);
|
|
}
|
|
} else {
|
|
assert(state === "readable");
|
|
if (bytesWritten === 0) {
|
|
throw new TypeError(
|
|
"bytesWritten must be greater than 0 when calling respond() on a readable stream",
|
|
);
|
|
}
|
|
if (
|
|
(firstDescriptor.bytesFilled + bytesWritten) >
|
|
// deno-lint-ignore prefer-primordials
|
|
firstDescriptor.byteLength
|
|
) {
|
|
throw new RangeError("bytesWritten out of range");
|
|
}
|
|
}
|
|
// deno-lint-ignore prefer-primordials
|
|
firstDescriptor.buffer = transferArrayBuffer(firstDescriptor.buffer);
|
|
readableByteStreamControllerRespondInternal(controller, bytesWritten);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @param {number} bytesWritten
|
|
* @param {PullIntoDescriptor} pullIntoDescriptor
|
|
* @returns {void}
|
|
*/
|
|
function readableByteStreamControllerRespondInReadableState(
|
|
controller,
|
|
bytesWritten,
|
|
pullIntoDescriptor,
|
|
) {
|
|
assert(
|
|
(pullIntoDescriptor.bytesFilled + bytesWritten) <=
|
|
// deno-lint-ignore prefer-primordials
|
|
pullIntoDescriptor.byteLength,
|
|
);
|
|
readableByteStreamControllerFillHeadPullIntoDescriptor(
|
|
controller,
|
|
bytesWritten,
|
|
pullIntoDescriptor,
|
|
);
|
|
if (pullIntoDescriptor.readerType === "none") {
|
|
readableByteStreamControllerEnqueueDetachedPullIntoToQueue(
|
|
controller,
|
|
pullIntoDescriptor,
|
|
);
|
|
readableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(
|
|
controller,
|
|
);
|
|
return;
|
|
}
|
|
if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.elementSize) {
|
|
return;
|
|
}
|
|
readableByteStreamControllerShiftPendingPullInto(controller);
|
|
const remainderSize = pullIntoDescriptor.bytesFilled %
|
|
pullIntoDescriptor.elementSize;
|
|
if (remainderSize > 0) {
|
|
// deno-lint-ignore prefer-primordials
|
|
const end = pullIntoDescriptor.byteOffset +
|
|
pullIntoDescriptor.bytesFilled;
|
|
readableByteStreamControllerEnqueueClonedChunkToQueue(
|
|
controller,
|
|
// deno-lint-ignore prefer-primordials
|
|
pullIntoDescriptor.buffer,
|
|
end - remainderSize,
|
|
remainderSize,
|
|
);
|
|
}
|
|
pullIntoDescriptor.bytesFilled -= remainderSize;
|
|
readableByteStreamControllerCommitPullIntoDescriptor(
|
|
controller[_stream],
|
|
pullIntoDescriptor,
|
|
);
|
|
readableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(
|
|
controller,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @param {number} bytesWritten
|
|
* @returns {void}
|
|
*/
|
|
function readableByteStreamControllerRespondInternal(
|
|
controller,
|
|
bytesWritten,
|
|
) {
|
|
const firstDescriptor = controller[_pendingPullIntos][0];
|
|
// deno-lint-ignore prefer-primordials
|
|
assert(canTransferArrayBuffer(firstDescriptor.buffer));
|
|
readableByteStreamControllerInvalidateBYOBRequest(controller);
|
|
const state = controller[_stream][_state];
|
|
if (state === "closed") {
|
|
assert(bytesWritten === 0);
|
|
readableByteStreamControllerRespondInClosedState(
|
|
controller,
|
|
firstDescriptor,
|
|
);
|
|
} else {
|
|
assert(state === "readable");
|
|
assert(bytesWritten > 0);
|
|
readableByteStreamControllerRespondInReadableState(
|
|
controller,
|
|
bytesWritten,
|
|
firstDescriptor,
|
|
);
|
|
}
|
|
readableByteStreamControllerCallPullIfNeeded(controller);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
*/
|
|
function readableByteStreamControllerInvalidateBYOBRequest(controller) {
|
|
if (controller[_byobRequest] === null) {
|
|
return;
|
|
}
|
|
controller[_byobRequest][_controller] = undefined;
|
|
controller[_byobRequest][_view] = null;
|
|
controller[_byobRequest] = null;
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @param {PullIntoDescriptor} firstDescriptor
|
|
*/
|
|
function readableByteStreamControllerRespondInClosedState(
|
|
controller,
|
|
firstDescriptor,
|
|
) {
|
|
assert(firstDescriptor.bytesFilled === 0);
|
|
if (firstDescriptor.readerType === "none") {
|
|
readableByteStreamControllerShiftPendingPullInto(controller);
|
|
}
|
|
const stream = controller[_stream];
|
|
if (readableStreamHasBYOBReader(stream)) {
|
|
while (readableStreamGetNumReadIntoRequests(stream) > 0) {
|
|
const pullIntoDescriptor =
|
|
readableByteStreamControllerShiftPendingPullInto(controller);
|
|
readableByteStreamControllerCommitPullIntoDescriptor(
|
|
stream,
|
|
pullIntoDescriptor,
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStream<R>} stream
|
|
* @param {PullIntoDescriptor} pullIntoDescriptor
|
|
*/
|
|
function readableByteStreamControllerCommitPullIntoDescriptor(
|
|
stream,
|
|
pullIntoDescriptor,
|
|
) {
|
|
assert(stream[_state] !== "errored");
|
|
assert(pullIntoDescriptor.readerType !== "none");
|
|
let done = false;
|
|
if (stream[_state] === "closed") {
|
|
assert(pullIntoDescriptor.bytesFilled === 0);
|
|
done = true;
|
|
}
|
|
const filledView = readableByteStreamControllerConvertPullIntoDescriptor(
|
|
pullIntoDescriptor,
|
|
);
|
|
if (pullIntoDescriptor.readerType === "default") {
|
|
readableStreamFulfillReadRequest(stream, filledView, done);
|
|
} else {
|
|
assert(pullIntoDescriptor.readerType === "byob");
|
|
readableStreamFulfillReadIntoRequest(stream, filledView, done);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @param {ArrayBufferView} view
|
|
*/
|
|
function readableByteStreamControllerRespondWithNewView(controller, view) {
|
|
assert(controller[_pendingPullIntos].length !== 0);
|
|
|
|
let buffer, byteLength, byteOffset;
|
|
if (TypedArrayPrototypeGetSymbolToStringTag(view) === undefined) {
|
|
buffer = DataViewPrototypeGetBuffer(/** @type {DataView} */ (view));
|
|
byteLength = DataViewPrototypeGetByteLength(/** @type {DataView} */ (view));
|
|
byteOffset = DataViewPrototypeGetByteOffset(/** @type {DataView} */ (view));
|
|
} else {
|
|
buffer = TypedArrayPrototypeGetBuffer(/** @type {Uint8Array}} */ (view));
|
|
byteLength = TypedArrayPrototypeGetByteLength(
|
|
/** @type {Uint8Array} */ (view),
|
|
);
|
|
byteOffset = TypedArrayPrototypeGetByteOffset(
|
|
/** @type {Uint8Array} */ (view),
|
|
);
|
|
}
|
|
assert(!isDetachedBuffer(buffer));
|
|
const firstDescriptor = controller[_pendingPullIntos][0];
|
|
const state = controller[_stream][_state];
|
|
if (state === "closed") {
|
|
if (byteLength !== 0) {
|
|
throw new TypeError(
|
|
"The view's length must be 0 when calling respondWithNewView() on a closed stream",
|
|
);
|
|
}
|
|
} else {
|
|
assert(state === "readable");
|
|
if (byteLength === 0) {
|
|
throw new TypeError(
|
|
"The view's length must be greater than 0 when calling respondWithNewView() on a readable stream",
|
|
);
|
|
}
|
|
}
|
|
// deno-lint-ignore prefer-primordials
|
|
if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== byteOffset) {
|
|
throw new RangeError(
|
|
"The region specified by view does not match byobRequest",
|
|
);
|
|
}
|
|
if (firstDescriptor.bufferByteLength !== getArrayBufferByteLength(buffer)) {
|
|
throw new RangeError(
|
|
"The buffer of view has different capacity than byobRequest",
|
|
);
|
|
}
|
|
// deno-lint-ignore prefer-primordials
|
|
if (firstDescriptor.bytesFilled + byteLength > firstDescriptor.byteLength) {
|
|
throw new RangeError(
|
|
"The region specified by view is larger than byobRequest",
|
|
);
|
|
}
|
|
firstDescriptor.buffer = transferArrayBuffer(buffer);
|
|
readableByteStreamControllerRespondInternal(controller, byteLength);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @returns {PullIntoDescriptor}
|
|
*/
|
|
function readableByteStreamControllerShiftPendingPullInto(controller) {
|
|
assert(controller[_byobRequest] === null);
|
|
return ArrayPrototypeShift(controller[_pendingPullIntos]);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @param {PullIntoDescriptor} pullIntoDescriptor
|
|
* @returns {boolean}
|
|
*/
|
|
function readableByteStreamControllerFillPullIntoDescriptorFromQueue(
|
|
controller,
|
|
pullIntoDescriptor,
|
|
) {
|
|
const elementSize = pullIntoDescriptor.elementSize;
|
|
const currentAlignedBytes = pullIntoDescriptor.bytesFilled -
|
|
(pullIntoDescriptor.bytesFilled % elementSize);
|
|
const maxBytesToCopy = MathMin(
|
|
controller[_queueTotalSize],
|
|
// deno-lint-ignore prefer-primordials
|
|
pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled,
|
|
);
|
|
const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;
|
|
const maxAlignedBytes = maxBytesFilled - (maxBytesFilled % elementSize);
|
|
let totalBytesToCopyRemaining = maxBytesToCopy;
|
|
let ready = false;
|
|
if (maxAlignedBytes > currentAlignedBytes) {
|
|
totalBytesToCopyRemaining = maxAlignedBytes -
|
|
pullIntoDescriptor.bytesFilled;
|
|
ready = true;
|
|
}
|
|
const queue = controller[_queue];
|
|
while (totalBytesToCopyRemaining > 0) {
|
|
const headOfQueue = queue[0];
|
|
const bytesToCopy = MathMin(
|
|
totalBytesToCopyRemaining,
|
|
// deno-lint-ignore prefer-primordials
|
|
headOfQueue.byteLength,
|
|
);
|
|
// deno-lint-ignore prefer-primordials
|
|
const destStart = pullIntoDescriptor.byteOffset +
|
|
pullIntoDescriptor.bytesFilled;
|
|
|
|
const destBuffer = new Uint8Array(
|
|
// deno-lint-ignore prefer-primordials
|
|
pullIntoDescriptor.buffer,
|
|
destStart,
|
|
bytesToCopy,
|
|
);
|
|
const srcBuffer = new Uint8Array(
|
|
// deno-lint-ignore prefer-primordials
|
|
headOfQueue.buffer,
|
|
// deno-lint-ignore prefer-primordials
|
|
headOfQueue.byteOffset,
|
|
bytesToCopy,
|
|
);
|
|
destBuffer.set(srcBuffer);
|
|
|
|
// deno-lint-ignore prefer-primordials
|
|
if (headOfQueue.byteLength === bytesToCopy) {
|
|
ArrayPrototypeShift(queue);
|
|
} else {
|
|
headOfQueue.byteOffset += bytesToCopy;
|
|
headOfQueue.byteLength -= bytesToCopy;
|
|
}
|
|
controller[_queueTotalSize] -= bytesToCopy;
|
|
readableByteStreamControllerFillHeadPullIntoDescriptor(
|
|
controller,
|
|
bytesToCopy,
|
|
pullIntoDescriptor,
|
|
);
|
|
totalBytesToCopyRemaining -= bytesToCopy;
|
|
}
|
|
if (!ready) {
|
|
assert(controller[_queueTotalSize] === 0);
|
|
assert(pullIntoDescriptor.bytesFilled > 0);
|
|
assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.elementSize);
|
|
}
|
|
return ready;
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @param {ReadRequest} readRequest
|
|
* @returns {void}
|
|
*/
|
|
function readableByteStreamControllerFillReadRequestFromQueue(
|
|
controller,
|
|
readRequest,
|
|
) {
|
|
assert(controller[_queueTotalSize] > 0);
|
|
const entry = ArrayPrototypeShift(controller[_queue]);
|
|
// deno-lint-ignore prefer-primordials
|
|
controller[_queueTotalSize] -= entry.byteLength;
|
|
readableByteStreamControllerHandleQueueDrain(controller);
|
|
const view = new Uint8Array(
|
|
// deno-lint-ignore prefer-primordials
|
|
entry.buffer,
|
|
// deno-lint-ignore prefer-primordials
|
|
entry.byteOffset,
|
|
// deno-lint-ignore prefer-primordials
|
|
entry.byteLength,
|
|
);
|
|
readRequest.chunkSteps(view);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableByteStreamController} controller
|
|
* @param {number} size
|
|
* @param {PullIntoDescriptor} pullIntoDescriptor
|
|
* @returns {void}
|
|
*/
|
|
function readableByteStreamControllerFillHeadPullIntoDescriptor(
|
|
controller,
|
|
size,
|
|
pullIntoDescriptor,
|
|
) {
|
|
assert(
|
|
controller[_pendingPullIntos].length === 0 ||
|
|
controller[_pendingPullIntos][0] === pullIntoDescriptor,
|
|
);
|
|
assert(controller[_byobRequest] === null);
|
|
pullIntoDescriptor.bytesFilled += size;
|
|
}
|
|
|
|
/**
|
|
* @param {PullIntoDescriptor} pullIntoDescriptor
|
|
* @returns {ArrayBufferView}
|
|
*/
|
|
function readableByteStreamControllerConvertPullIntoDescriptor(
|
|
pullIntoDescriptor,
|
|
) {
|
|
const bytesFilled = pullIntoDescriptor.bytesFilled;
|
|
const elementSize = pullIntoDescriptor.elementSize;
|
|
// deno-lint-ignore prefer-primordials
|
|
assert(bytesFilled <= pullIntoDescriptor.byteLength);
|
|
assert((bytesFilled % elementSize) === 0);
|
|
// deno-lint-ignore prefer-primordials
|
|
const buffer = transferArrayBuffer(pullIntoDescriptor.buffer);
|
|
return new pullIntoDescriptor.viewConstructor(
|
|
buffer,
|
|
// deno-lint-ignore prefer-primordials
|
|
pullIntoDescriptor.byteOffset,
|
|
bytesFilled / elementSize,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStreamDefaultReader<R>} reader
|
|
* @param {ReadRequest<R>} readRequest
|
|
* @returns {void}
|
|
*/
|
|
function readableStreamDefaultReaderRead(reader, readRequest) {
|
|
const stream = reader[_stream];
|
|
assert(stream);
|
|
stream[_disturbed] = true;
|
|
if (stream[_state] === "closed") {
|
|
readRequest.closeSteps();
|
|
} else if (stream[_state] === "errored") {
|
|
readRequest.errorSteps(stream[_storedError]);
|
|
} else {
|
|
assert(stream[_state] === "readable");
|
|
stream[_controller][_pullSteps](readRequest);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStreamDefaultReader<R>} reader
|
|
*/
|
|
function readableStreamDefaultReaderRelease(reader) {
|
|
readableStreamReaderGenericRelease(reader);
|
|
const e = new TypeError("The reader was released.");
|
|
readableStreamDefaultReaderErrorReadRequests(reader, e);
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStream<R>} stream
|
|
* @param {any} e
|
|
*/
|
|
function readableStreamError(stream, e) {
|
|
assert(stream[_state] === "readable");
|
|
stream[_state] = "errored";
|
|
stream[_storedError] = e;
|
|
/** @type {ReadableStreamDefaultReader<R> | undefined} */
|
|
const reader = stream[_reader];
|
|
if (reader === undefined) {
|
|
return;
|
|
}
|
|
/** @type {Deferred<void>} */
|
|
const closedPromise = reader[_closedPromise];
|
|
closedPromise.reject(e);
|
|
setPromiseIsHandledToTrue(closedPromise.promise);
|
|
if (isReadableStreamDefaultReader(reader)) {
|
|
readableStreamDefaultReaderErrorReadRequests(reader, e);
|
|
} else {
|
|
assert(isReadableStreamBYOBReader(reader));
|
|
readableStreamBYOBReaderErrorReadIntoRequests(reader, e);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStream<R>} stream
|
|
* @param {R} chunk
|
|
* @param {boolean} done
|
|
*/
|
|
function readableStreamFulfillReadIntoRequest(stream, chunk, done) {
|
|
assert(readableStreamHasBYOBReader(stream));
|
|
/** @type {ReadableStreamDefaultReader<R>} */
|
|
const reader = stream[_reader];
|
|
assert(reader[_readIntoRequests].length !== 0);
|
|
/** @type {ReadIntoRequest} */
|
|
const readIntoRequest = ArrayPrototypeShift(reader[_readIntoRequests]);
|
|
if (done) {
|
|
readIntoRequest.closeSteps(chunk);
|
|
} else {
|
|
readIntoRequest.chunkSteps(chunk);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStream<R>} stream
|
|
* @param {R} chunk
|
|
* @param {boolean} done
|
|
*/
|
|
function readableStreamFulfillReadRequest(stream, chunk, done) {
|
|
assert(readableStreamHasDefaultReader(stream) === true);
|
|
/** @type {ReadableStreamDefaultReader<R>} */
|
|
const reader = stream[_reader];
|
|
assert(reader[_readRequests].length);
|
|
/** @type {ReadRequest<R>} */
|
|
const readRequest = ArrayPrototypeShift(reader[_readRequests]);
|
|
if (done) {
|
|
readRequest.closeSteps();
|
|
} else {
|
|
readRequest.chunkSteps(chunk);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStream} stream
|
|
* @return {number}
|
|
*/
|
|
function readableStreamGetNumReadIntoRequests(stream) {
|
|
assert(readableStreamHasBYOBReader(stream) === true);
|
|
return stream[_reader][_readIntoRequests].length;
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStream} stream
|
|
* @return {number}
|
|
*/
|
|
function readableStreamGetNumReadRequests(stream) {
|
|
assert(readableStreamHasDefaultReader(stream) === true);
|
|
return stream[_reader][_readRequests].length;
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStream} stream
|
|
* @returns {boolean}
|
|
*/
|
|
function readableStreamHasBYOBReader(stream) {
|
|
const reader = stream[_reader];
|
|
if (reader === undefined) {
|
|
return false;
|
|
}
|
|
if (isReadableStreamBYOBReader(reader)) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStream} stream
|
|
* @returns {boolean}
|
|
*/
|
|
function readableStreamHasDefaultReader(stream) {
|
|
const reader = stream[_reader];
|
|
if (reader === undefined) {
|
|
return false;
|
|
}
|
|
if (isReadableStreamDefaultReader(reader)) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @param {ReadableStream<T>} source
|
|
* @param {WritableStream<T>} dest
|
|
* @param {boolean} preventClose
|
|
* @param {boolean} preventAbort
|
|
* @param {boolean} preventCancel
|
|
* @param {AbortSignal=} signal
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function readableStreamPipeTo(
|
|
source,
|
|
dest,
|
|
preventClose,
|
|
preventAbort,
|
|
preventCancel,
|
|
signal,
|
|
) {
|
|
assert(isReadableStream(source));
|
|
assert(isWritableStream(dest));
|
|
assert(
|
|
typeof preventClose === "boolean" && typeof preventAbort === "boolean" &&
|
|
typeof preventCancel === "boolean",
|
|
);
|
|
assert(
|
|
signal === undefined ||
|
|
ObjectPrototypeIsPrototypeOf(AbortSignalPrototype, signal),
|
|
);
|
|
assert(!isReadableStreamLocked(source));
|
|
assert(!isWritableStreamLocked(dest));
|
|
// We use acquireReadableStreamDefaultReader even in case of ReadableByteStreamController
|
|
// as the spec allows us, and the only reason to use BYOBReader is to do some smart things
|
|
// with it, but the spec does not specify what things, so to simplify we stick to DefaultReader.
|
|
const reader = acquireReadableStreamDefaultReader(source);
|
|
const writer = acquireWritableStreamDefaultWriter(dest);
|
|
source[_disturbed] = true;
|
|
let shuttingDown = false;
|
|
let currentWrite = resolvePromiseWith(undefined);
|
|
/** @type {Deferred<void>} */
|
|
const promise = new Deferred();
|
|
/** @type {() => void} */
|
|
let abortAlgorithm;
|
|
if (signal) {
|
|
abortAlgorithm = () => {
|
|
const error = signal.reason;
|
|
/** @type {Array<() => Promise<void>>} */
|
|
const actions = [];
|
|
if (preventAbort === false) {
|
|
ArrayPrototypePush(actions, () => {
|
|
if (dest[_state] === "writable") {
|
|
return writableStreamAbort(dest, error);
|
|
} else {
|
|
return resolvePromiseWith(undefined);
|
|
}
|
|
});
|
|
}
|
|
if (preventCancel === false) {
|
|
ArrayPrototypePush(actions, () => {
|
|
if (source[_state] === "readable") {
|
|
return readableStreamCancel(source, error);
|
|
} else {
|
|
return resolvePromiseWith(undefined);
|
|
}
|
|
});
|
|
}
|
|
shutdownWithAction(
|
|
() => SafePromiseAll(ArrayPrototypeMap(actions, (action) => action())),
|
|
true,
|
|
error,
|
|
);
|
|
};
|
|
|
|
if (signal.aborted) {
|
|
abortAlgorithm();
|
|
return promise.promise;
|
|
}
|
|
signal[add](abortAlgorithm);
|
|
}
|
|
|
|
function pipeLoop() {
|
|
return new Promise((resolveLoop, rejectLoop) => {
|
|
/** @param {boolean} done */
|
|
function next(done) {
|
|
if (done) {
|
|
resolveLoop();
|
|
} else {
|
|
uponPromise(pipeStep(), next, rejectLoop);
|
|
}
|
|
}
|
|
next(false);
|
|
});
|
|
}
|
|
|
|
/** @returns {Promise<boolean>} */
|
|
function pipeStep() {
|
|
if (shuttingDown === true) {
|
|
return resolvePromiseWith(true);
|
|
}
|
|
|
|
return transformPromiseWith(writer[_readyPromise].promise, () => {
|
|
return new Promise((resolveRead, rejectRead) => {
|
|
readableStreamDefaultReaderRead(
|
|
reader,
|
|
{
|
|
chunkSteps(chunk) {
|
|
currentWrite = transformPromiseWith(
|
|
writableStreamDefaultWriterWrite(writer, chunk),
|
|
undefined,
|
|
() => {},
|
|
);
|
|
resolveRead(false);
|
|
},
|
|
closeSteps() {
|
|
resolveRead(true);
|
|
},
|
|
errorSteps: rejectRead,
|
|
},
|
|
);
|
|
});
|
|
});
|
|
}
|
|
|
|
isOrBecomesErrored(
|
|
source,
|
|
reader[_closedPromise].promise,
|
|
(storedError) => {
|
|
if (preventAbort === false) {
|
|
shutdownWithAction(
|
|
() => writableStreamAbort(dest, storedError),
|
|
true,
|
|
storedError,
|
|
);
|
|
} else {
|
|
shutdown(true, storedError);
|
|
}
|
|
},
|
|
);
|
|
|
|
isOrBecomesErrored(dest, writer[_closedPromise].promise, (storedError) => {
|
|
if (preventCancel === false) {
|
|
shutdownWithAction(
|
|
() => readableStreamCancel(source, storedError),
|
|
true,
|
|
storedError,
|
|
);
|
|
} else {
|
|
shutdown(true, storedError);
|
|
}
|
|
});
|
|
|
|
isOrBecomesClosed(source, reader[_closedPromise].promise, () => {
|
|
if (preventClose === false) {
|
|
shutdownWithAction(() =>
|
|
writableStreamDefaultWriterCloseWithErrorPropagation(writer)
|
|
);
|
|
} else {
|
|
shutdown();
|
|
}
|
|
});
|
|
|
|
if (
|
|
writableStreamCloseQueuedOrInFlight(dest) === true ||
|
|
dest[_state] === "closed"
|
|
) {
|
|
const destClosed = new TypeError(
|
|
"The destination writable stream closed before all the data could be piped to it.",
|
|
);
|
|
if (preventCancel === false) {
|
|
shutdownWithAction(
|
|
() => readableStreamCancel(source, destClosed),
|
|
true,
|
|
destClosed,
|
|
);
|
|
} else {
|
|
shutdown(true, destClosed);
|
|
}
|
|
}
|
|
|
|
setPromiseIsHandledToTrue(pipeLoop());
|
|
|
|
return promise.promise;
|
|
|
|
/** @returns {Promise<void>} */
|
|
function waitForWritesToFinish() {
|
|
const oldCurrentWrite = currentWrite;
|
|
return transformPromiseWith(
|
|
currentWrite,
|
|
() =>
|
|
oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStream | WritableStream} stream
|
|
* @param {Promise<any>} promise
|
|
* @param {(e: any) => void} action
|
|
*/
|
|
function isOrBecomesErrored(stream, promise, action) {
|
|
if (stream[_state] === "errored") {
|
|
action(stream[_storedError]);
|
|
} else {
|
|
uponRejection(promise, action);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStream} stream
|
|
* @param {Promise<any>} promise
|
|
* @param {() => void} action
|
|
*/
|
|
function isOrBecomesClosed(stream, promise, action) {
|
|
if (stream[_state] === "closed") {
|
|
action();
|
|
} else {
|
|
uponFulfillment(promise, action);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {() => Promise<void[] | void>} action
|
|
* @param {boolean=} originalIsError
|
|
* @param {any=} originalError
|
|
*/
|
|
function shutdownWithAction(action, originalIsError, originalError) {
|
|
function doTheRest() {
|
|
uponPromise(
|
|
action(),
|
|
() => finalize(originalIsError, originalError),
|
|
(newError) => finalize(true, newError),
|
|
);
|
|
}
|
|
|
|
if (shuttingDown === true) {
|
|
return;
|
|
}
|
|
shuttingDown = true;
|
|
|
|
if (
|
|
dest[_state] === "writable" &&
|
|
writableStreamCloseQueuedOrInFlight(dest) === false
|
|
) {
|
|
uponFulfillment(waitForWritesToFinish(), doTheRest);
|
|
} else {
|
|
doTheRest();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {boolean=} isError
|
|
* @param {any=} error
|
|
*/
|
|
function shutdown(isError, error) {
|
|
if (shuttingDown) {
|
|
return;
|
|
}
|
|
shuttingDown = true;
|
|
if (
|
|
dest[_state] === "writable" &&
|
|
writableStreamCloseQueuedOrInFlight(dest) === false
|
|
) {
|
|
uponFulfillment(
|
|
waitForWritesToFinish(),
|
|
() => finalize(isError, error),
|
|
);
|
|
} else {
|
|
finalize(isError, error);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {boolean=} isError
|
|
* @param {any=} error
|
|
*/
|
|
function finalize(isError, error) {
|
|
writableStreamDefaultWriterRelease(writer);
|
|
readableStreamDefaultReaderRelease(reader);
|
|
|
|
if (signal !== undefined) {
|
|
signal[remove](abortAlgorithm);
|
|
}
|
|
if (isError) {
|
|
promise.reject(error);
|
|
} else {
|
|
promise.resolve(undefined);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStreamGenericReader<any> | ReadableStreamBYOBReader} reader
|
|
* @param {any} reason
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function readableStreamReaderGenericCancel(reader, reason) {
|
|
const stream = reader[_stream];
|
|
assert(stream !== undefined);
|
|
return readableStreamCancel(stream, reason);
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStreamDefaultReader<R> | ReadableStreamBYOBReader} reader
|
|
* @param {ReadableStream<R>} stream
|
|
*/
|
|
function readableStreamReaderGenericInitialize(reader, stream) {
|
|
reader[_stream] = stream;
|
|
stream[_reader] = reader;
|
|
if (stream[_state] === "readable") {
|
|
reader[_closedPromise] = new Deferred();
|
|
} else if (stream[_state] === "closed") {
|
|
reader[_closedPromise] = new Deferred();
|
|
reader[_closedPromise].resolve(undefined);
|
|
} else {
|
|
assert(stream[_state] === "errored");
|
|
reader[_closedPromise] = new Deferred();
|
|
reader[_closedPromise].reject(stream[_storedError]);
|
|
setPromiseIsHandledToTrue(reader[_closedPromise].promise);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStreamGenericReader<R> | ReadableStreamBYOBReader} reader
|
|
*/
|
|
function readableStreamReaderGenericRelease(reader) {
|
|
const stream = reader[_stream];
|
|
assert(stream !== undefined);
|
|
assert(stream[_reader] === reader);
|
|
if (stream[_state] === "readable") {
|
|
reader[_closedPromise].reject(
|
|
new TypeError(
|
|
"Reader was released and can no longer be used to monitor the stream's closedness.",
|
|
),
|
|
);
|
|
} else {
|
|
reader[_closedPromise] = new Deferred();
|
|
reader[_closedPromise].reject(
|
|
new TypeError(
|
|
"Reader was released and can no longer be used to monitor the stream's closedness.",
|
|
),
|
|
);
|
|
}
|
|
setPromiseIsHandledToTrue(reader[_closedPromise].promise);
|
|
stream[_controller][_releaseSteps]();
|
|
stream[_reader] = undefined;
|
|
reader[_stream] = undefined;
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStreamBYOBReader} reader
|
|
* @param {any} e
|
|
*/
|
|
function readableStreamBYOBReaderErrorReadIntoRequests(reader, e) {
|
|
const readIntoRequests = reader[_readIntoRequests];
|
|
reader[_readIntoRequests] = [];
|
|
for (let i = 0; i < readIntoRequests.length; ++i) {
|
|
const readIntoRequest = readIntoRequests[i];
|
|
readIntoRequest.errorSteps(e);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStream<R>} stream
|
|
* @param {boolean} cloneForBranch2
|
|
* @returns {[ReadableStream<R>, ReadableStream<R>]}
|
|
*/
|
|
function readableStreamTee(stream, cloneForBranch2) {
|
|
assert(isReadableStream(stream));
|
|
assert(typeof cloneForBranch2 === "boolean");
|
|
if (
|
|
ObjectPrototypeIsPrototypeOf(
|
|
ReadableByteStreamControllerPrototype,
|
|
stream[_controller],
|
|
)
|
|
) {
|
|
return readableByteStreamTee(stream);
|
|
} else {
|
|
return readableStreamDefaultTee(stream, cloneForBranch2);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStream<R>} stream
|
|
* @param {boolean} cloneForBranch2
|
|
* @returns {[ReadableStream<R>, ReadableStream<R>]}
|
|
*/
|
|
function readableStreamDefaultTee(stream, cloneForBranch2) {
|
|
assert(isReadableStream(stream));
|
|
assert(typeof cloneForBranch2 === "boolean");
|
|
const reader = acquireReadableStreamDefaultReader(stream);
|
|
let reading = false;
|
|
let readAgain = false;
|
|
let canceled1 = false;
|
|
let canceled2 = false;
|
|
/** @type {any} */
|
|
let reason1;
|
|
/** @type {any} */
|
|
let reason2;
|
|
/** @type {ReadableStream<R>} */
|
|
// deno-lint-ignore prefer-const
|
|
let branch1;
|
|
/** @type {ReadableStream<R>} */
|
|
// deno-lint-ignore prefer-const
|
|
let branch2;
|
|
|
|
/** @type {Deferred<void>} */
|
|
const cancelPromise = new Deferred();
|
|
|
|
function pullAlgorithm() {
|
|
if (reading === true) {
|
|
readAgain = true;
|
|
return resolvePromiseWith(undefined);
|
|
}
|
|
reading = true;
|
|
/** @type {ReadRequest<R>} */
|
|
const readRequest = {
|
|
chunkSteps(value) {
|
|
queueMicrotask(() => {
|
|
readAgain = false;
|
|
const value1 = value;
|
|
const value2 = value;
|
|
|
|
// TODO(lucacasonato): respect clonedForBranch2.
|
|
|
|
if (canceled1 === false) {
|
|
readableStreamDefaultControllerEnqueue(
|
|
/** @type {ReadableStreamDefaultController<any>} */ branch1[
|
|
_controller
|
|
],
|
|
value1,
|
|
);
|
|
}
|
|
if (canceled2 === false) {
|
|
readableStreamDefaultControllerEnqueue(
|
|
/** @type {ReadableStreamDefaultController<any>} */ branch2[
|
|
_controller
|
|
],
|
|
value2,
|
|
);
|
|
}
|
|
|
|
reading = false;
|
|
if (readAgain === true) {
|
|
pullAlgorithm();
|
|
}
|
|
});
|
|
},
|
|
closeSteps() {
|
|
reading = false;
|
|
if (canceled1 === false) {
|
|
readableStreamDefaultControllerClose(
|
|
/** @type {ReadableStreamDefaultController<any>} */ branch1[
|
|
_controller
|
|
],
|
|
);
|
|
}
|
|
if (canceled2 === false) {
|
|
readableStreamDefaultControllerClose(
|
|
/** @type {ReadableStreamDefaultController<any>} */ branch2[
|
|
_controller
|
|
],
|
|
);
|
|
}
|
|
if (canceled1 === false || canceled2 === false) {
|
|
cancelPromise.resolve(undefined);
|
|
}
|
|
},
|
|
errorSteps() {
|
|
reading = false;
|
|
},
|
|
};
|
|
readableStreamDefaultReaderRead(reader, readRequest);
|
|
return resolvePromiseWith(undefined);
|
|
}
|
|
|
|
/**
|
|
* @param {any} reason
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function cancel1Algorithm(reason) {
|
|
canceled1 = true;
|
|
reason1 = reason;
|
|
if (canceled2 === true) {
|
|
const compositeReason = [reason1, reason2];
|
|
const cancelResult = readableStreamCancel(stream, compositeReason);
|
|
cancelPromise.resolve(cancelResult);
|
|
}
|
|
return cancelPromise.promise;
|
|
}
|
|
|
|
/**
|
|
* @param {any} reason
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function cancel2Algorithm(reason) {
|
|
canceled2 = true;
|
|
reason2 = reason;
|
|
if (canceled1 === true) {
|
|
const compositeReason = [reason1, reason2];
|
|
const cancelResult = readableStreamCancel(stream, compositeReason);
|
|
cancelPromise.resolve(cancelResult);
|
|
}
|
|
return cancelPromise.promise;
|
|
}
|
|
|
|
function startAlgorithm() {}
|
|
|
|
branch1 = createReadableStream(
|
|
startAlgorithm,
|
|
pullAlgorithm,
|
|
cancel1Algorithm,
|
|
);
|
|
branch2 = createReadableStream(
|
|
startAlgorithm,
|
|
pullAlgorithm,
|
|
cancel2Algorithm,
|
|
);
|
|
|
|
uponRejection(reader[_closedPromise].promise, (r) => {
|
|
readableStreamDefaultControllerError(
|
|
/** @type {ReadableStreamDefaultController<any>} */ branch1[
|
|
_controller
|
|
],
|
|
r,
|
|
);
|
|
readableStreamDefaultControllerError(
|
|
/** @type {ReadableStreamDefaultController<any>} */ branch2[
|
|
_controller
|
|
],
|
|
r,
|
|
);
|
|
if (canceled1 === false || canceled2 === false) {
|
|
cancelPromise.resolve(undefined);
|
|
}
|
|
});
|
|
|
|
return [branch1, branch2];
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStream<R>} stream
|
|
* @returns {[ReadableStream<R>, ReadableStream<R>]}
|
|
*/
|
|
function readableByteStreamTee(stream) {
|
|
assert(isReadableStream(stream));
|
|
assert(
|
|
ObjectPrototypeIsPrototypeOf(
|
|
ReadableByteStreamControllerPrototype,
|
|
stream[_controller],
|
|
),
|
|
);
|
|
let reader = acquireReadableStreamDefaultReader(stream);
|
|
let reading = false;
|
|
let readAgainForBranch1 = false;
|
|
let readAgainForBranch2 = false;
|
|
let canceled1 = false;
|
|
let canceled2 = false;
|
|
let reason1 = undefined;
|
|
let reason2 = undefined;
|
|
let branch1 = undefined;
|
|
let branch2 = undefined;
|
|
/** @type {Deferred<void>} */
|
|
const cancelPromise = new Deferred();
|
|
|
|
/**
|
|
* @param {ReadableStreamBYOBReader} thisReader
|
|
*/
|
|
function forwardReaderError(thisReader) {
|
|
PromisePrototypeCatch(thisReader[_closedPromise].promise, (e) => {
|
|
if (thisReader !== reader) {
|
|
return;
|
|
}
|
|
readableByteStreamControllerError(branch1[_controller], e);
|
|
readableByteStreamControllerError(branch2[_controller], e);
|
|
if (!canceled1 || !canceled2) {
|
|
cancelPromise.resolve(undefined);
|
|
}
|
|
});
|
|
}
|
|
|
|
function pullWithDefaultReader() {
|
|
if (isReadableStreamBYOBReader(reader)) {
|
|
assert(reader[_readIntoRequests].length === 0);
|
|
readableStreamBYOBReaderRelease(reader);
|
|
reader = acquireReadableStreamDefaultReader(stream);
|
|
forwardReaderError(reader);
|
|
}
|
|
|
|
/** @type {ReadRequest} */
|
|
const readRequest = {
|
|
chunkSteps(chunk) {
|
|
queueMicrotask(() => {
|
|
readAgainForBranch1 = false;
|
|
readAgainForBranch2 = false;
|
|
const chunk1 = chunk;
|
|
let chunk2 = chunk;
|
|
if (!canceled1 && !canceled2) {
|
|
try {
|
|
chunk2 = cloneAsUint8Array(chunk);
|
|
} catch (e) {
|
|
readableByteStreamControllerError(branch1[_controller], e);
|
|
readableByteStreamControllerError(branch2[_controller], e);
|
|
cancelPromise.resolve(readableStreamCancel(stream, e));
|
|
return;
|
|
}
|
|
}
|
|
if (!canceled1) {
|
|
readableByteStreamControllerEnqueue(branch1[_controller], chunk1);
|
|
}
|
|
if (!canceled2) {
|
|
readableByteStreamControllerEnqueue(branch2[_controller], chunk2);
|
|
}
|
|
reading = false;
|
|
if (readAgainForBranch1) {
|
|
pull1Algorithm();
|
|
} else if (readAgainForBranch2) {
|
|
pull2Algorithm();
|
|
}
|
|
});
|
|
},
|
|
closeSteps() {
|
|
reading = false;
|
|
if (!canceled1) {
|
|
readableByteStreamControllerClose(branch1[_controller]);
|
|
}
|
|
if (!canceled2) {
|
|
readableByteStreamControllerClose(branch2[_controller]);
|
|
}
|
|
if (branch1[_controller][_pendingPullIntos].length !== 0) {
|
|
readableByteStreamControllerRespond(branch1[_controller], 0);
|
|
}
|
|
if (branch2[_controller][_pendingPullIntos].length !== 0) {
|
|
readableByteStreamControllerRespond(branch2[_controller], 0);
|
|
}
|
|
if (!canceled1 || !canceled2) {
|
|
cancelPromise.resolve(undefined);
|
|
}
|
|
},
|
|
errorSteps() {
|
|
reading = false;
|
|
},
|
|
};
|
|
readableStreamDefaultReaderRead(reader, readRequest);
|
|
}
|
|
|
|
function pullWithBYOBReader(view, forBranch2) {
|
|
if (isReadableStreamDefaultReader(reader)) {
|
|
assert(reader[_readRequests].length === 0);
|
|
readableStreamDefaultReaderRelease(reader);
|
|
reader = acquireReadableStreamBYOBReader(stream);
|
|
forwardReaderError(reader);
|
|
}
|
|
const byobBranch = forBranch2 ? branch2 : branch1;
|
|
const otherBranch = forBranch2 ? branch1 : branch2;
|
|
|
|
/** @type {ReadIntoRequest} */
|
|
const readIntoRequest = {
|
|
chunkSteps(chunk) {
|
|
queueMicrotask(() => {
|
|
readAgainForBranch1 = false;
|
|
readAgainForBranch2 = false;
|
|
const byobCanceled = forBranch2 ? canceled2 : canceled1;
|
|
const otherCanceled = forBranch2 ? canceled1 : canceled2;
|
|
if (!otherCanceled) {
|
|
let clonedChunk;
|
|
try {
|
|
clonedChunk = cloneAsUint8Array(chunk);
|
|
} catch (e) {
|
|
readableByteStreamControllerError(byobBranch[_controller], e);
|
|
readableByteStreamControllerError(otherBranch[_controller], e);
|
|
cancelPromise.resolve(readableStreamCancel(stream, e));
|
|
return;
|
|
}
|
|
if (!byobCanceled) {
|
|
readableByteStreamControllerRespondWithNewView(
|
|
byobBranch[_controller],
|
|
chunk,
|
|
);
|
|
}
|
|
readableByteStreamControllerEnqueue(
|
|
otherBranch[_controller],
|
|
clonedChunk,
|
|
);
|
|
} else if (!byobCanceled) {
|
|
readableByteStreamControllerRespondWithNewView(
|
|
byobBranch[_controller],
|
|
chunk,
|
|
);
|
|
}
|
|
reading = false;
|
|
if (readAgainForBranch1) {
|
|
pull1Algorithm();
|
|
} else if (readAgainForBranch2) {
|
|
pull2Algorithm();
|
|
}
|
|
});
|
|
},
|
|
closeSteps(chunk) {
|
|
reading = false;
|
|
const byobCanceled = forBranch2 ? canceled2 : canceled1;
|
|
const otherCanceled = forBranch2 ? canceled1 : canceled2;
|
|
if (!byobCanceled) {
|
|
readableByteStreamControllerClose(byobBranch[_controller]);
|
|
}
|
|
if (!otherCanceled) {
|
|
readableByteStreamControllerClose(otherBranch[_controller]);
|
|
}
|
|
if (chunk !== undefined) {
|
|
let byteLength;
|
|
if (TypedArrayPrototypeGetSymbolToStringTag(chunk) === undefined) {
|
|
byteLength = DataViewPrototypeGetByteLength(
|
|
/** @type {DataView} */ (chunk),
|
|
);
|
|
} else {
|
|
byteLength = TypedArrayPrototypeGetByteLength(
|
|
/** @type {Uint8Array} */ (chunk),
|
|
);
|
|
}
|
|
assert(byteLength === 0);
|
|
if (!byobCanceled) {
|
|
readableByteStreamControllerRespondWithNewView(
|
|
byobBranch[_controller],
|
|
chunk,
|
|
);
|
|
}
|
|
if (
|
|
!otherCanceled &&
|
|
otherBranch[_controller][_pendingPullIntos].length !== 0
|
|
) {
|
|
readableByteStreamControllerRespond(otherBranch[_controller], 0);
|
|
}
|
|
}
|
|
if (!byobCanceled || !otherCanceled) {
|
|
cancelPromise.resolve(undefined);
|
|
}
|
|
},
|
|
errorSteps() {
|
|
reading = false;
|
|
},
|
|
};
|
|
readableStreamBYOBReaderRead(reader, view, readIntoRequest);
|
|
}
|
|
|
|
function pull1Algorithm() {
|
|
if (reading) {
|
|
readAgainForBranch1 = true;
|
|
return PromiseResolve(undefined);
|
|
}
|
|
reading = true;
|
|
const byobRequest = readableByteStreamControllerGetBYOBRequest(
|
|
branch1[_controller],
|
|
);
|
|
if (byobRequest === null) {
|
|
pullWithDefaultReader();
|
|
} else {
|
|
pullWithBYOBReader(byobRequest[_view], false);
|
|
}
|
|
return PromiseResolve(undefined);
|
|
}
|
|
|
|
function pull2Algorithm() {
|
|
if (reading) {
|
|
readAgainForBranch2 = true;
|
|
return PromiseResolve(undefined);
|
|
}
|
|
reading = true;
|
|
const byobRequest = readableByteStreamControllerGetBYOBRequest(
|
|
branch2[_controller],
|
|
);
|
|
if (byobRequest === null) {
|
|
pullWithDefaultReader();
|
|
} else {
|
|
pullWithBYOBReader(byobRequest[_view], true);
|
|
}
|
|
return PromiseResolve(undefined);
|
|
}
|
|
|
|
function cancel1Algorithm(reason) {
|
|
canceled1 = true;
|
|
reason1 = reason;
|
|
if (canceled2) {
|
|
const compositeReason = [reason1, reason2];
|
|
const cancelResult = readableStreamCancel(stream, compositeReason);
|
|
cancelPromise.resolve(cancelResult);
|
|
}
|
|
return cancelPromise.promise;
|
|
}
|
|
|
|
function cancel2Algorithm(reason) {
|
|
canceled2 = true;
|
|
reason2 = reason;
|
|
if (canceled1) {
|
|
const compositeReason = [reason1, reason2];
|
|
const cancelResult = readableStreamCancel(stream, compositeReason);
|
|
cancelPromise.resolve(cancelResult);
|
|
}
|
|
return cancelPromise.promise;
|
|
}
|
|
|
|
function startAlgorithm() {
|
|
return undefined;
|
|
}
|
|
|
|
branch1 = createReadableByteStream(
|
|
startAlgorithm,
|
|
pull1Algorithm,
|
|
cancel1Algorithm,
|
|
);
|
|
branch2 = createReadableByteStream(
|
|
startAlgorithm,
|
|
pull2Algorithm,
|
|
cancel2Algorithm,
|
|
);
|
|
|
|
branch1[_original] = stream;
|
|
branch2[_original] = stream;
|
|
|
|
forwardReaderError(reader);
|
|
return [branch1, branch2];
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStream<ArrayBuffer>} stream
|
|
* @param {ReadableByteStreamController} controller
|
|
* @param {() => void} startAlgorithm
|
|
* @param {() => Promise<void>} pullAlgorithm
|
|
* @param {(reason: any) => Promise<void>} cancelAlgorithm
|
|
* @param {number} highWaterMark
|
|
* @param {number | undefined} autoAllocateChunkSize
|
|
*/
|
|
function setUpReadableByteStreamController(
|
|
stream,
|
|
controller,
|
|
startAlgorithm,
|
|
pullAlgorithm,
|
|
cancelAlgorithm,
|
|
highWaterMark,
|
|
autoAllocateChunkSize,
|
|
) {
|
|
assert(stream[_controller] === undefined);
|
|
if (autoAllocateChunkSize !== undefined) {
|
|
assert(NumberIsInteger(autoAllocateChunkSize));
|
|
assert(autoAllocateChunkSize >= 0);
|
|
}
|
|
controller[_stream] = stream;
|
|
controller[_pullAgain] = controller[_pulling] = false;
|
|
controller[_byobRequest] = null;
|
|
resetQueue(controller);
|
|
controller[_closeRequested] = controller[_started] = false;
|
|
controller[_strategyHWM] = highWaterMark;
|
|
controller[_pullAlgorithm] = pullAlgorithm;
|
|
controller[_cancelAlgorithm] = cancelAlgorithm;
|
|
controller[_autoAllocateChunkSize] = autoAllocateChunkSize;
|
|
controller[_pendingPullIntos] = [];
|
|
stream[_controller] = controller;
|
|
const startResult = startAlgorithm();
|
|
const startPromise = resolvePromiseWith(startResult);
|
|
setPromiseIsHandledToTrue(
|
|
PromisePrototypeThen(
|
|
startPromise,
|
|
() => {
|
|
controller[_started] = true;
|
|
assert(controller[_pulling] === false);
|
|
assert(controller[_pullAgain] === false);
|
|
readableByteStreamControllerCallPullIfNeeded(controller);
|
|
},
|
|
(r) => {
|
|
readableByteStreamControllerError(controller, r);
|
|
},
|
|
),
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStream<ArrayBuffer>} stream
|
|
* @param {UnderlyingSource<ArrayBuffer>} underlyingSource
|
|
* @param {UnderlyingSource<ArrayBuffer>} underlyingSourceDict
|
|
* @param {number} highWaterMark
|
|
*/
|
|
function setUpReadableByteStreamControllerFromUnderlyingSource(
|
|
stream,
|
|
underlyingSource,
|
|
underlyingSourceDict,
|
|
highWaterMark,
|
|
) {
|
|
const controller = webidl.createBranded(ReadableByteStreamController);
|
|
/** @type {() => void} */
|
|
let startAlgorithm = () => undefined;
|
|
/** @type {() => Promise<void>} */
|
|
let pullAlgorithm = () => resolvePromiseWith(undefined);
|
|
/** @type {(reason: any) => Promise<void>} */
|
|
let cancelAlgorithm = (_reason) => resolvePromiseWith(undefined);
|
|
if (underlyingSourceDict.start !== undefined) {
|
|
startAlgorithm = () =>
|
|
webidl.invokeCallbackFunction(
|
|
underlyingSourceDict.start,
|
|
[controller],
|
|
underlyingSource,
|
|
webidl.converters.any,
|
|
"Failed to call 'startAlgorithm' on 'ReadableByteStreamController'",
|
|
);
|
|
}
|
|
if (underlyingSourceDict.pull !== undefined) {
|
|
pullAlgorithm = () =>
|
|
webidl.invokeCallbackFunction(
|
|
underlyingSourceDict.pull,
|
|
[controller],
|
|
underlyingSource,
|
|
webidl.converters["Promise<undefined>"],
|
|
"Failed to call 'pullAlgorithm' on 'ReadableByteStreamController'",
|
|
true,
|
|
);
|
|
}
|
|
if (underlyingSourceDict.cancel !== undefined) {
|
|
cancelAlgorithm = (reason) =>
|
|
webidl.invokeCallbackFunction(
|
|
underlyingSourceDict.cancel,
|
|
[reason],
|
|
underlyingSource,
|
|
webidl.converters["Promise<undefined>"],
|
|
"Failed to call 'cancelAlgorithm' on 'ReadableByteStreamController'",
|
|
true,
|
|
);
|
|
}
|
|
const autoAllocateChunkSize = underlyingSourceDict["autoAllocateChunkSize"];
|
|
if (autoAllocateChunkSize === 0) {
|
|
throw new TypeError("autoAllocateChunkSize must be greater than 0");
|
|
}
|
|
setUpReadableByteStreamController(
|
|
stream,
|
|
controller,
|
|
startAlgorithm,
|
|
pullAlgorithm,
|
|
cancelAlgorithm,
|
|
highWaterMark,
|
|
autoAllocateChunkSize,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStream<R>} stream
|
|
* @param {ReadableStreamDefaultController<R>} controller
|
|
* @param {(controller: ReadableStreamDefaultController<R>) => void | Promise<void>} startAlgorithm
|
|
* @param {(controller: ReadableStreamDefaultController<R>) => Promise<void>} pullAlgorithm
|
|
* @param {(reason: any) => Promise<void>} cancelAlgorithm
|
|
* @param {number} highWaterMark
|
|
* @param {(chunk: R) => number} sizeAlgorithm
|
|
*/
|
|
function setUpReadableStreamDefaultController(
|
|
stream,
|
|
controller,
|
|
startAlgorithm,
|
|
pullAlgorithm,
|
|
cancelAlgorithm,
|
|
highWaterMark,
|
|
sizeAlgorithm,
|
|
) {
|
|
assert(stream[_controller] === undefined);
|
|
controller[_stream] = stream;
|
|
resetQueue(controller);
|
|
controller[_started] =
|
|
controller[_closeRequested] =
|
|
controller[_pullAgain] =
|
|
controller[_pulling] =
|
|
false;
|
|
controller[_strategySizeAlgorithm] = sizeAlgorithm;
|
|
controller[_strategyHWM] = highWaterMark;
|
|
controller[_pullAlgorithm] = pullAlgorithm;
|
|
controller[_cancelAlgorithm] = cancelAlgorithm;
|
|
stream[_controller] = controller;
|
|
const startResult = startAlgorithm(controller);
|
|
const startPromise = resolvePromiseWith(startResult);
|
|
uponPromise(startPromise, () => {
|
|
controller[_started] = true;
|
|
assert(controller[_pulling] === false);
|
|
assert(controller[_pullAgain] === false);
|
|
readableStreamDefaultControllerCallPullIfNeeded(controller);
|
|
}, (r) => {
|
|
readableStreamDefaultControllerError(controller, r);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStream<R>} stream
|
|
* @param {UnderlyingSource<R>} underlyingSource
|
|
* @param {UnderlyingSource<R>} underlyingSourceDict
|
|
* @param {number} highWaterMark
|
|
* @param {(chunk: R) => number} sizeAlgorithm
|
|
*/
|
|
function setUpReadableStreamDefaultControllerFromUnderlyingSource(
|
|
stream,
|
|
underlyingSource,
|
|
underlyingSourceDict,
|
|
highWaterMark,
|
|
sizeAlgorithm,
|
|
) {
|
|
const controller = webidl.createBranded(ReadableStreamDefaultController);
|
|
/** @type {() => Promise<void>} */
|
|
let startAlgorithm = () => undefined;
|
|
/** @type {() => Promise<void>} */
|
|
let pullAlgorithm = () => resolvePromiseWith(undefined);
|
|
/** @type {(reason?: any) => Promise<void>} */
|
|
let cancelAlgorithm = () => resolvePromiseWith(undefined);
|
|
if (underlyingSourceDict.start !== undefined) {
|
|
startAlgorithm = () =>
|
|
webidl.invokeCallbackFunction(
|
|
underlyingSourceDict.start,
|
|
[controller],
|
|
underlyingSource,
|
|
webidl.converters.any,
|
|
"Failed to call 'startAlgorithm' on 'ReadableStreamDefaultController'",
|
|
);
|
|
}
|
|
if (underlyingSourceDict.pull !== undefined) {
|
|
pullAlgorithm = () =>
|
|
webidl.invokeCallbackFunction(
|
|
underlyingSourceDict.pull,
|
|
[controller],
|
|
underlyingSource,
|
|
webidl.converters["Promise<undefined>"],
|
|
"Failed to call 'pullAlgorithm' on 'ReadableStreamDefaultController'",
|
|
true,
|
|
);
|
|
}
|
|
if (underlyingSourceDict.cancel !== undefined) {
|
|
cancelAlgorithm = (reason) =>
|
|
webidl.invokeCallbackFunction(
|
|
underlyingSourceDict.cancel,
|
|
[reason],
|
|
underlyingSource,
|
|
webidl.converters["Promise<undefined>"],
|
|
"Failed to call 'cancelAlgorithm' on 'ReadableStreamDefaultController'",
|
|
true,
|
|
);
|
|
}
|
|
setUpReadableStreamDefaultController(
|
|
stream,
|
|
controller,
|
|
startAlgorithm,
|
|
pullAlgorithm,
|
|
cancelAlgorithm,
|
|
highWaterMark,
|
|
sizeAlgorithm,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStreamBYOBReader} reader
|
|
* @param {ReadableStream<R>} stream
|
|
*/
|
|
function setUpReadableStreamBYOBReader(reader, stream) {
|
|
if (isReadableStreamLocked(stream)) {
|
|
throw new TypeError("ReadableStream is locked.");
|
|
}
|
|
if (
|
|
!(ObjectPrototypeIsPrototypeOf(
|
|
ReadableByteStreamControllerPrototype,
|
|
stream[_controller],
|
|
))
|
|
) {
|
|
throw new TypeError("Cannot use a BYOB reader with a non-byte stream");
|
|
}
|
|
readableStreamReaderGenericInitialize(reader, stream);
|
|
reader[_readIntoRequests] = [];
|
|
}
|
|
|
|
/**
|
|
* @template R
|
|
* @param {ReadableStreamDefaultReader<R>} reader
|
|
* @param {ReadableStream<R>} stream
|
|
*/
|
|
function setUpReadableStreamDefaultReader(reader, stream) {
|
|
if (isReadableStreamLocked(stream)) {
|
|
throw new TypeError("ReadableStream is locked.");
|
|
}
|
|
readableStreamReaderGenericInitialize(reader, stream);
|
|
reader[_readRequests] = [];
|
|
}
|
|
|
|
/**
|
|
* @template O
|
|
* @param {TransformStream<any, O>} stream
|
|
* @param {TransformStreamDefaultController<O>} controller
|
|
* @param {(chunk: O, controller: TransformStreamDefaultController<O>) => Promise<void>} transformAlgorithm
|
|
* @param {(controller: TransformStreamDefaultController<O>) => Promise<void>} flushAlgorithm
|
|
*/
|
|
function setUpTransformStreamDefaultController(
|
|
stream,
|
|
controller,
|
|
transformAlgorithm,
|
|
flushAlgorithm,
|
|
) {
|
|
assert(ObjectPrototypeIsPrototypeOf(TransformStreamPrototype, stream));
|
|
assert(stream[_controller] === undefined);
|
|
controller[_stream] = stream;
|
|
stream[_controller] = controller;
|
|
controller[_transformAlgorithm] = transformAlgorithm;
|
|
controller[_flushAlgorithm] = flushAlgorithm;
|
|
}
|
|
|
|
/**
|
|
* @template I
|
|
* @template O
|
|
* @param {TransformStream<I, O>} stream
|
|
* @param {Transformer<I, O>} transformer
|
|
* @param {Transformer<I, O>} transformerDict
|
|
*/
|
|
function setUpTransformStreamDefaultControllerFromTransformer(
|
|
stream,
|
|
transformer,
|
|
transformerDict,
|
|
) {
|
|
/** @type {TransformStreamDefaultController<O>} */
|
|
const controller = webidl.createBranded(TransformStreamDefaultController);
|
|
/** @type {(chunk: O, controller: TransformStreamDefaultController<O>) => Promise<void>} */
|
|
let transformAlgorithm = (chunk) => {
|
|
try {
|
|
transformStreamDefaultControllerEnqueue(controller, chunk);
|
|
} catch (e) {
|
|
return PromiseReject(e);
|
|
}
|
|
return resolvePromiseWith(undefined);
|
|
};
|
|
/** @type {(controller: TransformStreamDefaultController<O>) => Promise<void>} */
|
|
let flushAlgorithm = () => resolvePromiseWith(undefined);
|
|
if (transformerDict.transform !== undefined) {
|
|
transformAlgorithm = (chunk, controller) =>
|
|
webidl.invokeCallbackFunction(
|
|
transformerDict.transform,
|
|
[chunk, controller],
|
|
transformer,
|
|
webidl.converters["Promise<undefined>"],
|
|
"Failed to call 'transformAlgorithm' on 'TransformStreamDefaultController'",
|
|
true,
|
|
);
|
|
}
|
|
if (transformerDict.flush !== undefined) {
|
|
flushAlgorithm = (controller) =>
|
|
webidl.invokeCallbackFunction(
|
|
transformerDict.flush,
|
|
[controller],
|
|
transformer,
|
|
webidl.converters["Promise<undefined>"],
|
|
"Failed to call 'flushAlgorithm' on 'TransformStreamDefaultController'",
|
|
true,
|
|
);
|
|
}
|
|
setUpTransformStreamDefaultController(
|
|
stream,
|
|
controller,
|
|
transformAlgorithm,
|
|
flushAlgorithm,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @template W
|
|
* @param {WritableStream<W>} stream
|
|
* @param {WritableStreamDefaultController<W>} controller
|
|
* @param {(controller: WritableStreamDefaultController<W>) => Promise<void>} startAlgorithm
|
|
* @param {(chunk: W, controller: WritableStreamDefaultController<W>) => Promise<void>} writeAlgorithm
|
|
* @param {() => Promise<void>} closeAlgorithm
|
|
* @param {(reason?: any) => Promise<void>} abortAlgorithm
|
|
* @param {number} highWaterMark
|
|
* @param {(chunk: W) => number} sizeAlgorithm
|
|
*/
|
|
function setUpWritableStreamDefaultController(
|
|
stream,
|
|
controller,
|
|
startAlgorithm,
|
|
writeAlgorithm,
|
|
closeAlgorithm,
|
|
abortAlgorithm,
|
|
highWaterMark,
|
|
sizeAlgorithm,
|
|
) {
|
|
assert(isWritableStream(stream));
|
|
assert(stream[_controller] === undefined);
|
|
controller[_stream] = stream;
|
|
stream[_controller] = controller;
|
|
resetQueue(controller);
|
|
controller[_signal] = newSignal();
|
|
controller[_started] = false;
|
|
controller[_strategySizeAlgorithm] = sizeAlgorithm;
|
|
controller[_strategyHWM] = highWaterMark;
|
|
controller[_writeAlgorithm] = writeAlgorithm;
|
|
controller[_closeAlgorithm] = closeAlgorithm;
|
|
controller[_abortAlgorithm] = abortAlgorithm;
|
|
const backpressure = writableStreamDefaultControllerGetBackpressure(
|
|
controller,
|
|
);
|
|
writableStreamUpdateBackpressure(stream, backpressure);
|
|
const startResult = startAlgorithm(controller);
|
|
const startPromise = resolvePromiseWith(startResult);
|
|
uponPromise(startPromise, () => {
|
|
assert(stream[_state] === "writable" || stream[_state] === "erroring");
|
|
controller[_started] = true;
|
|
writableStreamDefaultControllerAdvanceQueueIfNeeded(controller);
|
|
}, (r) => {
|
|
assert(stream[_state] === "writable" || stream[_state] === "erroring");
|
|
controller[_started] = true;
|
|
writableStreamDealWithRejection(stream, r);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @template W
|
|
* @param {WritableStream<W>} stream
|
|
* @param {UnderlyingSink<W>} underlyingSink
|
|
* @param {UnderlyingSink<W>} underlyingSinkDict
|
|
* @param {number} highWaterMark
|
|
* @param {(chunk: W) => number} sizeAlgorithm
|
|
*/
|
|
function setUpWritableStreamDefaultControllerFromUnderlyingSink(
|
|
stream,
|
|
underlyingSink,
|
|
underlyingSinkDict,
|
|
highWaterMark,
|
|
sizeAlgorithm,
|
|
) {
|
|
const controller = webidl.createBranded(WritableStreamDefaultController);
|
|
/** @type {(controller: WritableStreamDefaultController<W>) => any} */
|
|
let startAlgorithm = () => undefined;
|
|
/** @type {(chunk: W, controller: WritableStreamDefaultController<W>) => Promise<void>} */
|
|
let writeAlgorithm = () => resolvePromiseWith(undefined);
|
|
let closeAlgorithm = () => resolvePromiseWith(undefined);
|
|
/** @type {(reason?: any) => Promise<void>} */
|
|
let abortAlgorithm = () => resolvePromiseWith(undefined);
|
|
|
|
if (underlyingSinkDict.start !== undefined) {
|
|
startAlgorithm = () =>
|
|
webidl.invokeCallbackFunction(
|
|
underlyingSinkDict.start,
|
|
[controller],
|
|
underlyingSink,
|
|
webidl.converters.any,
|
|
"Failed to call 'startAlgorithm' on 'WritableStreamDefaultController'",
|
|
);
|
|
}
|
|
if (underlyingSinkDict.write !== undefined) {
|
|
writeAlgorithm = (chunk) =>
|
|
webidl.invokeCallbackFunction(
|
|
underlyingSinkDict.write,
|
|
[chunk, controller],
|
|
underlyingSink,
|
|
webidl.converters["Promise<undefined>"],
|
|
"Failed to call 'writeAlgorithm' on 'WritableStreamDefaultController'",
|
|
true,
|
|
);
|
|
}
|
|
if (underlyingSinkDict.close !== undefined) {
|
|
closeAlgorithm = () =>
|
|
webidl.invokeCallbackFunction(
|
|
underlyingSinkDict.close,
|
|
[],
|
|
underlyingSink,
|
|
webidl.converters["Promise<undefined>"],
|
|
"Failed to call 'closeAlgorithm' on 'WritableStreamDefaultController'",
|
|
true,
|
|
);
|
|
}
|
|
if (underlyingSinkDict.abort !== undefined) {
|
|
abortAlgorithm = (reason) =>
|
|
webidl.invokeCallbackFunction(
|
|
underlyingSinkDict.abort,
|
|
[reason],
|
|
underlyingSink,
|
|
webidl.converters["Promise<undefined>"],
|
|
"Failed to call 'abortAlgorithm' on 'WritableStreamDefaultController'",
|
|
true,
|
|
);
|
|
}
|
|
setUpWritableStreamDefaultController(
|
|
stream,
|
|
controller,
|
|
startAlgorithm,
|
|
writeAlgorithm,
|
|
closeAlgorithm,
|
|
abortAlgorithm,
|
|
highWaterMark,
|
|
sizeAlgorithm,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @template W
|
|
* @param {WritableStreamDefaultWriter<W>} writer
|
|
* @param {WritableStream<W>} stream
|
|
*/
|
|
function setUpWritableStreamDefaultWriter(writer, stream) {
|
|
if (isWritableStreamLocked(stream) === true) {
|
|
throw new TypeError("The stream is already locked.");
|
|
}
|
|
writer[_stream] = stream;
|
|
stream[_writer] = writer;
|
|
const state = stream[_state];
|
|
if (state === "writable") {
|
|
if (
|
|
writableStreamCloseQueuedOrInFlight(stream) === false &&
|
|
stream[_backpressure] === true
|
|
) {
|
|
writer[_readyPromise] = new Deferred();
|
|
} else {
|
|
writer[_readyPromise] = new Deferred();
|
|
writer[_readyPromise].resolve(undefined);
|
|
}
|
|
writer[_closedPromise] = new Deferred();
|
|
} else if (state === "erroring") {
|
|
writer[_readyPromise] = new Deferred();
|
|
writer[_readyPromise].reject(stream[_storedError]);
|
|
setPromiseIsHandledToTrue(writer[_readyPromise].promise);
|
|
writer[_closedPromise] = new Deferred();
|
|
} else if (state === "closed") {
|
|
writer[_readyPromise] = new Deferred();
|
|
writer[_readyPromise].resolve(undefined);
|
|
writer[_closedPromise] = new Deferred();
|
|
writer[_closedPromise].resolve(undefined);
|
|
} else {
|
|
assert(state === "errored");
|
|
const storedError = stream[_storedError];
|
|
writer[_readyPromise] = new Deferred();
|
|
writer[_readyPromise].reject(storedError);
|
|
setPromiseIsHandledToTrue(writer[_readyPromise].promise);
|
|
writer[_closedPromise] = new Deferred();
|
|
writer[_closedPromise].reject(storedError);
|
|
setPromiseIsHandledToTrue(writer[_closedPromise].promise);
|
|
}
|
|
}
|
|
|
|
/** @param {TransformStreamDefaultController} controller */
|
|
function transformStreamDefaultControllerClearAlgorithms(controller) {
|
|
controller[_transformAlgorithm] = undefined;
|
|
controller[_flushAlgorithm] = undefined;
|
|
}
|
|
|
|
/**
|
|
* @template O
|
|
* @param {TransformStreamDefaultController<O>} controller
|
|
* @param {O} chunk
|
|
*/
|
|
function transformStreamDefaultControllerEnqueue(controller, chunk) {
|
|
const stream = controller[_stream];
|
|
const readableController = stream[_readable][_controller];
|
|
if (
|
|
readableStreamDefaultControllerCanCloseOrEnqueue(
|
|
/** @type {ReadableStreamDefaultController<O>} */ readableController,
|
|
) === false
|
|
) {
|
|
throw new TypeError("Readable stream is unavailable.");
|
|
}
|
|
try {
|
|
readableStreamDefaultControllerEnqueue(
|
|
/** @type {ReadableStreamDefaultController<O>} */ readableController,
|
|
chunk,
|
|
);
|
|
} catch (e) {
|
|
transformStreamErrorWritableAndUnblockWrite(stream, e);
|
|
throw stream[_readable][_storedError];
|
|
}
|
|
const backpressure = readableStreamDefaultcontrollerHasBackpressure(
|
|
/** @type {ReadableStreamDefaultController<O>} */ readableController,
|
|
);
|
|
if (backpressure !== stream[_backpressure]) {
|
|
assert(backpressure === true);
|
|
transformStreamSetBackpressure(stream, true);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {TransformStreamDefaultController} controller
|
|
* @param {any=} e
|
|
*/
|
|
function transformStreamDefaultControllerError(controller, e) {
|
|
transformStreamError(controller[_stream], e);
|
|
}
|
|
|
|
/**
|
|
* @template O
|
|
* @param {TransformStreamDefaultController<O>} controller
|
|
* @param {any} chunk
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function transformStreamDefaultControllerPerformTransform(controller, chunk) {
|
|
const transformPromise = controller[_transformAlgorithm](chunk, controller);
|
|
return transformPromiseWith(transformPromise, undefined, (r) => {
|
|
transformStreamError(controller[_stream], r);
|
|
throw r;
|
|
});
|
|
}
|
|
|
|
/** @param {TransformStreamDefaultController} controller */
|
|
function transformStreamDefaultControllerTerminate(controller) {
|
|
const stream = controller[_stream];
|
|
const readableController = stream[_readable][_controller];
|
|
readableStreamDefaultControllerClose(
|
|
/** @type {ReadableStreamDefaultController} */ readableController,
|
|
);
|
|
const error = new TypeError("The stream has been terminated.");
|
|
transformStreamErrorWritableAndUnblockWrite(stream, error);
|
|
}
|
|
|
|
/**
|
|
* @param {TransformStream} stream
|
|
* @param {any=} reason
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function transformStreamDefaultSinkAbortAlgorithm(stream, reason) {
|
|
transformStreamError(stream, reason);
|
|
return resolvePromiseWith(undefined);
|
|
}
|
|
|
|
/**
|
|
* @template I
|
|
* @template O
|
|
* @param {TransformStream<I, O>} stream
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function transformStreamDefaultSinkCloseAlgorithm(stream) {
|
|
const readable = stream[_readable];
|
|
const controller = stream[_controller];
|
|
const flushPromise = controller[_flushAlgorithm](controller);
|
|
transformStreamDefaultControllerClearAlgorithms(controller);
|
|
return transformPromiseWith(flushPromise, () => {
|
|
if (readable[_state] === "errored") {
|
|
throw readable[_storedError];
|
|
}
|
|
readableStreamDefaultControllerClose(
|
|
/** @type {ReadableStreamDefaultController} */ readable[_controller],
|
|
);
|
|
}, (r) => {
|
|
transformStreamError(stream, r);
|
|
throw readable[_storedError];
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @template I
|
|
* @template O
|
|
* @param {TransformStream<I, O>} stream
|
|
* @param {I} chunk
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function transformStreamDefaultSinkWriteAlgorithm(stream, chunk) {
|
|
assert(stream[_writable][_state] === "writable");
|
|
const controller = stream[_controller];
|
|
if (stream[_backpressure] === true) {
|
|
const backpressureChangePromise = stream[_backpressureChangePromise];
|
|
assert(backpressureChangePromise !== undefined);
|
|
return transformPromiseWith(backpressureChangePromise.promise, () => {
|
|
const writable = stream[_writable];
|
|
const state = writable[_state];
|
|
if (state === "erroring") {
|
|
throw writable[_storedError];
|
|
}
|
|
assert(state === "writable");
|
|
return transformStreamDefaultControllerPerformTransform(
|
|
controller,
|
|
chunk,
|
|
);
|
|
});
|
|
}
|
|
return transformStreamDefaultControllerPerformTransform(controller, chunk);
|
|
}
|
|
|
|
/**
|
|
* @param {TransformStream} stream
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function transformStreamDefaultSourcePullAlgorithm(stream) {
|
|
assert(stream[_backpressure] === true);
|
|
assert(stream[_backpressureChangePromise] !== undefined);
|
|
transformStreamSetBackpressure(stream, false);
|
|
return stream[_backpressureChangePromise].promise;
|
|
}
|
|
|
|
/**
|
|
* @param {TransformStream} stream
|
|
* @param {any=} e
|
|
*/
|
|
function transformStreamError(stream, e) {
|
|
readableStreamDefaultControllerError(
|
|
/** @type {ReadableStreamDefaultController} */ stream[_readable][
|
|
_controller
|
|
],
|
|
e,
|
|
);
|
|
transformStreamErrorWritableAndUnblockWrite(stream, e);
|
|
}
|
|
|
|
/**
|
|
* @param {TransformStream} stream
|
|
* @param {any=} e
|
|
*/
|
|
function transformStreamErrorWritableAndUnblockWrite(stream, e) {
|
|
transformStreamDefaultControllerClearAlgorithms(stream[_controller]);
|
|
writableStreamDefaultControllerErrorIfNeeded(
|
|
stream[_writable][_controller],
|
|
e,
|
|
);
|
|
if (stream[_backpressure] === true) {
|
|
transformStreamSetBackpressure(stream, false);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {TransformStream} stream
|
|
* @param {boolean} backpressure
|
|
*/
|
|
function transformStreamSetBackpressure(stream, backpressure) {
|
|
assert(stream[_backpressure] !== backpressure);
|
|
if (stream[_backpressureChangePromise] !== undefined) {
|
|
stream[_backpressureChangePromise].resolve(undefined);
|
|
}
|
|
stream[_backpressureChangePromise] = new Deferred();
|
|
stream[_backpressure] = backpressure;
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStream} stream
|
|
* @param {any=} reason
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function writableStreamAbort(stream, reason) {
|
|
const state = stream[_state];
|
|
if (state === "closed" || state === "errored") {
|
|
return resolvePromiseWith(undefined);
|
|
}
|
|
stream[_controller][_signal][signalAbort](reason);
|
|
if (state === "closed" || state === "errored") {
|
|
return resolvePromiseWith(undefined);
|
|
}
|
|
if (stream[_pendingAbortRequest] !== undefined) {
|
|
return stream[_pendingAbortRequest].deferred.promise;
|
|
}
|
|
assert(state === "writable" || state === "erroring");
|
|
let wasAlreadyErroring = false;
|
|
if (state === "erroring") {
|
|
wasAlreadyErroring = true;
|
|
reason = undefined;
|
|
}
|
|
/** Deferred<void> */
|
|
const deferred = new Deferred();
|
|
stream[_pendingAbortRequest] = {
|
|
deferred,
|
|
reason,
|
|
wasAlreadyErroring,
|
|
};
|
|
if (wasAlreadyErroring === false) {
|
|
writableStreamStartErroring(stream, reason);
|
|
}
|
|
return deferred.promise;
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStream} stream
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function writableStreamAddWriteRequest(stream) {
|
|
assert(isWritableStreamLocked(stream) === true);
|
|
assert(stream[_state] === "writable");
|
|
/** @type {Deferred<void>} */
|
|
const deferred = new Deferred();
|
|
ArrayPrototypePush(stream[_writeRequests], deferred);
|
|
return deferred.promise;
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStream} stream
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function writableStreamClose(stream) {
|
|
const state = stream[_state];
|
|
if (state === "closed" || state === "errored") {
|
|
return PromiseReject(
|
|
new TypeError("Writable stream is closed or errored."),
|
|
);
|
|
}
|
|
assert(state === "writable" || state === "erroring");
|
|
assert(writableStreamCloseQueuedOrInFlight(stream) === false);
|
|
/** @type {Deferred<void>} */
|
|
const deferred = new Deferred();
|
|
stream[_closeRequest] = deferred;
|
|
const writer = stream[_writer];
|
|
if (
|
|
writer !== undefined && stream[_backpressure] === true &&
|
|
state === "writable"
|
|
) {
|
|
writer[_readyPromise].resolve(undefined);
|
|
}
|
|
writableStreamDefaultControllerClose(stream[_controller]);
|
|
return deferred.promise;
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStream} stream
|
|
* @returns {boolean}
|
|
*/
|
|
function writableStreamCloseQueuedOrInFlight(stream) {
|
|
if (
|
|
stream[_closeRequest] === undefined &&
|
|
stream[_inFlightCloseRequest] === undefined
|
|
) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStream} stream
|
|
* @param {any=} error
|
|
*/
|
|
function writableStreamDealWithRejection(stream, error) {
|
|
const state = stream[_state];
|
|
if (state === "writable") {
|
|
writableStreamStartErroring(stream, error);
|
|
return;
|
|
}
|
|
assert(state === "erroring");
|
|
writableStreamFinishErroring(stream);
|
|
}
|
|
|
|
/**
|
|
* @template W
|
|
* @param {WritableStreamDefaultController<W>} controller
|
|
*/
|
|
function writableStreamDefaultControllerAdvanceQueueIfNeeded(controller) {
|
|
const stream = controller[_stream];
|
|
if (controller[_started] === false) {
|
|
return;
|
|
}
|
|
if (stream[_inFlightWriteRequest] !== undefined) {
|
|
return;
|
|
}
|
|
const state = stream[_state];
|
|
assert(state !== "closed" && state !== "errored");
|
|
if (state === "erroring") {
|
|
writableStreamFinishErroring(stream);
|
|
return;
|
|
}
|
|
if (controller[_queue].length === 0) {
|
|
return;
|
|
}
|
|
const value = peekQueueValue(controller);
|
|
if (value === _close) {
|
|
writableStreamDefaultControllerProcessClose(controller);
|
|
} else {
|
|
writableStreamDefaultControllerProcessWrite(controller, value);
|
|
}
|
|
}
|
|
|
|
function writableStreamDefaultControllerClearAlgorithms(controller) {
|
|
controller[_writeAlgorithm] = undefined;
|
|
controller[_closeAlgorithm] = undefined;
|
|
controller[_abortAlgorithm] = undefined;
|
|
controller[_strategySizeAlgorithm] = undefined;
|
|
}
|
|
|
|
/** @param {WritableStreamDefaultController} controller */
|
|
function writableStreamDefaultControllerClose(controller) {
|
|
enqueueValueWithSize(controller, _close, 0);
|
|
writableStreamDefaultControllerAdvanceQueueIfNeeded(controller);
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStreamDefaultController} controller
|
|
* @param {any} error
|
|
*/
|
|
function writableStreamDefaultControllerError(controller, error) {
|
|
const stream = controller[_stream];
|
|
assert(stream[_state] === "writable");
|
|
writableStreamDefaultControllerClearAlgorithms(controller);
|
|
writableStreamStartErroring(stream, error);
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStreamDefaultController} controller
|
|
* @param {any} error
|
|
*/
|
|
function writableStreamDefaultControllerErrorIfNeeded(controller, error) {
|
|
if (controller[_stream][_state] === "writable") {
|
|
writableStreamDefaultControllerError(controller, error);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStreamDefaultController} controller
|
|
* @returns {boolean}
|
|
*/
|
|
function writableStreamDefaultControllerGetBackpressure(controller) {
|
|
const desiredSize = writableStreamDefaultControllerGetDesiredSize(
|
|
controller,
|
|
);
|
|
return desiredSize <= 0;
|
|
}
|
|
|
|
/**
|
|
* @template W
|
|
* @param {WritableStreamDefaultController<W>} controller
|
|
* @param {W} chunk
|
|
* @returns {number}
|
|
*/
|
|
function writableStreamDefaultControllerGetChunkSize(controller, chunk) {
|
|
let value;
|
|
try {
|
|
value = controller[_strategySizeAlgorithm](chunk);
|
|
} catch (e) {
|
|
writableStreamDefaultControllerErrorIfNeeded(controller, e);
|
|
return 1;
|
|
}
|
|
return value;
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStreamDefaultController} controller
|
|
* @returns {number}
|
|
*/
|
|
function writableStreamDefaultControllerGetDesiredSize(controller) {
|
|
return controller[_strategyHWM] - controller[_queueTotalSize];
|
|
}
|
|
|
|
/** @param {WritableStreamDefaultController} controller */
|
|
function writableStreamDefaultControllerProcessClose(controller) {
|
|
const stream = controller[_stream];
|
|
writableStreamMarkCloseRequestInFlight(stream);
|
|
dequeueValue(controller);
|
|
assert(controller[_queue].length === 0);
|
|
const sinkClosePromise = controller[_closeAlgorithm]();
|
|
writableStreamDefaultControllerClearAlgorithms(controller);
|
|
uponPromise(sinkClosePromise, () => {
|
|
writableStreamFinishInFlightClose(stream);
|
|
}, (reason) => {
|
|
writableStreamFinishInFlightCloseWithError(stream, reason);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @template W
|
|
* @param {WritableStreamDefaultController<W>} controller
|
|
* @param {W} chunk
|
|
*/
|
|
function writableStreamDefaultControllerProcessWrite(controller, chunk) {
|
|
const stream = controller[_stream];
|
|
writableStreamMarkFirstWriteRequestInFlight(stream);
|
|
const sinkWritePromise = controller[_writeAlgorithm](chunk, controller);
|
|
uponPromise(sinkWritePromise, () => {
|
|
writableStreamFinishInFlightWrite(stream);
|
|
const state = stream[_state];
|
|
assert(state === "writable" || state === "erroring");
|
|
dequeueValue(controller);
|
|
if (
|
|
writableStreamCloseQueuedOrInFlight(stream) === false &&
|
|
state === "writable"
|
|
) {
|
|
const backpressure = writableStreamDefaultControllerGetBackpressure(
|
|
controller,
|
|
);
|
|
writableStreamUpdateBackpressure(stream, backpressure);
|
|
}
|
|
writableStreamDefaultControllerAdvanceQueueIfNeeded(controller);
|
|
}, (reason) => {
|
|
if (stream[_state] === "writable") {
|
|
writableStreamDefaultControllerClearAlgorithms(controller);
|
|
}
|
|
writableStreamFinishInFlightWriteWithError(stream, reason);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @template W
|
|
* @param {WritableStreamDefaultController<W>} controller
|
|
* @param {W} chunk
|
|
* @param {number} chunkSize
|
|
*/
|
|
function writableStreamDefaultControllerWrite(controller, chunk, chunkSize) {
|
|
try {
|
|
enqueueValueWithSize(controller, chunk, chunkSize);
|
|
} catch (e) {
|
|
writableStreamDefaultControllerErrorIfNeeded(controller, e);
|
|
return;
|
|
}
|
|
const stream = controller[_stream];
|
|
if (
|
|
writableStreamCloseQueuedOrInFlight(stream) === false &&
|
|
stream[_state] === "writable"
|
|
) {
|
|
const backpressure = writableStreamDefaultControllerGetBackpressure(
|
|
controller,
|
|
);
|
|
writableStreamUpdateBackpressure(stream, backpressure);
|
|
}
|
|
writableStreamDefaultControllerAdvanceQueueIfNeeded(controller);
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStreamDefaultWriter} writer
|
|
* @param {any=} reason
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function writableStreamDefaultWriterAbort(writer, reason) {
|
|
const stream = writer[_stream];
|
|
assert(stream !== undefined);
|
|
return writableStreamAbort(stream, reason);
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStreamDefaultWriter} writer
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function writableStreamDefaultWriterClose(writer) {
|
|
const stream = writer[_stream];
|
|
assert(stream !== undefined);
|
|
return writableStreamClose(stream);
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStreamDefaultWriter} writer
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function writableStreamDefaultWriterCloseWithErrorPropagation(writer) {
|
|
const stream = writer[_stream];
|
|
assert(stream !== undefined);
|
|
const state = stream[_state];
|
|
if (
|
|
writableStreamCloseQueuedOrInFlight(stream) === true || state === "closed"
|
|
) {
|
|
return resolvePromiseWith(undefined);
|
|
}
|
|
if (state === "errored") {
|
|
return PromiseReject(stream[_storedError]);
|
|
}
|
|
assert(state === "writable" || state === "erroring");
|
|
return writableStreamDefaultWriterClose(writer);
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStreamDefaultWriter} writer
|
|
* @param {any=} error
|
|
*/
|
|
function writableStreamDefaultWriterEnsureClosedPromiseRejected(
|
|
writer,
|
|
error,
|
|
) {
|
|
if (writer[_closedPromise].state === "pending") {
|
|
writer[_closedPromise].reject(error);
|
|
} else {
|
|
writer[_closedPromise] = new Deferred();
|
|
writer[_closedPromise].reject(error);
|
|
}
|
|
setPromiseIsHandledToTrue(writer[_closedPromise].promise);
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStreamDefaultWriter} writer
|
|
* @param {any=} error
|
|
*/
|
|
function writableStreamDefaultWriterEnsureReadyPromiseRejected(
|
|
writer,
|
|
error,
|
|
) {
|
|
if (writer[_readyPromise].state === "pending") {
|
|
writer[_readyPromise].reject(error);
|
|
} else {
|
|
writer[_readyPromise] = new Deferred();
|
|
writer[_readyPromise].reject(error);
|
|
}
|
|
setPromiseIsHandledToTrue(writer[_readyPromise].promise);
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStreamDefaultWriter} writer
|
|
* @returns {number | null}
|
|
*/
|
|
function writableStreamDefaultWriterGetDesiredSize(writer) {
|
|
const stream = writer[_stream];
|
|
const state = stream[_state];
|
|
if (state === "errored" || state === "erroring") {
|
|
return null;
|
|
}
|
|
if (state === "closed") {
|
|
return 0;
|
|
}
|
|
return writableStreamDefaultControllerGetDesiredSize(stream[_controller]);
|
|
}
|
|
|
|
/** @param {WritableStreamDefaultWriter} writer */
|
|
function writableStreamDefaultWriterRelease(writer) {
|
|
const stream = writer[_stream];
|
|
assert(stream !== undefined);
|
|
assert(stream[_writer] === writer);
|
|
const releasedError = new TypeError(
|
|
"The writer has already been released.",
|
|
);
|
|
writableStreamDefaultWriterEnsureReadyPromiseRejected(
|
|
writer,
|
|
releasedError,
|
|
);
|
|
writableStreamDefaultWriterEnsureClosedPromiseRejected(
|
|
writer,
|
|
releasedError,
|
|
);
|
|
stream[_writer] = undefined;
|
|
writer[_stream] = undefined;
|
|
}
|
|
|
|
/**
|
|
* @template W
|
|
* @param {WritableStreamDefaultWriter<W>} writer
|
|
* @param {W} chunk
|
|
* @returns {Promise<void>}
|
|
*/
|
|
function writableStreamDefaultWriterWrite(writer, chunk) {
|
|
const stream = writer[_stream];
|
|
assert(stream !== undefined);
|
|
const controller = stream[_controller];
|
|
const chunkSize = writableStreamDefaultControllerGetChunkSize(
|
|
controller,
|
|
chunk,
|
|
);
|
|
if (stream !== writer[_stream]) {
|
|
return PromiseReject(new TypeError("Writer's stream is unexpected."));
|
|
}
|
|
const state = stream[_state];
|
|
if (state === "errored") {
|
|
return PromiseReject(stream[_storedError]);
|
|
}
|
|
if (
|
|
writableStreamCloseQueuedOrInFlight(stream) === true || state === "closed"
|
|
) {
|
|
return PromiseReject(
|
|
new TypeError("The stream is closing or is closed."),
|
|
);
|
|
}
|
|
if (state === "erroring") {
|
|
return PromiseReject(stream[_storedError]);
|
|
}
|
|
assert(state === "writable");
|
|
const promise = writableStreamAddWriteRequest(stream);
|
|
writableStreamDefaultControllerWrite(controller, chunk, chunkSize);
|
|
return promise;
|
|
}
|
|
|
|
/** @param {WritableStream} stream */
|
|
function writableStreamFinishErroring(stream) {
|
|
assert(stream[_state] === "erroring");
|
|
assert(writableStreamHasOperationMarkedInFlight(stream) === false);
|
|
stream[_state] = "errored";
|
|
stream[_controller][_errorSteps]();
|
|
const storedError = stream[_storedError];
|
|
const writeRequests = stream[_writeRequests];
|
|
for (let i = 0; i < writeRequests.length; ++i) {
|
|
const writeRequest = writeRequests[i];
|
|
writeRequest.reject(storedError);
|
|
}
|
|
stream[_writeRequests] = [];
|
|
if (stream[_pendingAbortRequest] === undefined) {
|
|
writableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
|
|
return;
|
|
}
|
|
const abortRequest = stream[_pendingAbortRequest];
|
|
stream[_pendingAbortRequest] = undefined;
|
|
if (abortRequest.wasAlreadyErroring === true) {
|
|
abortRequest.deferred.reject(storedError);
|
|
writableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
|
|
return;
|
|
}
|
|
const promise = stream[_controller][_abortSteps](abortRequest.reason);
|
|
uponPromise(promise, () => {
|
|
abortRequest.deferred.resolve(undefined);
|
|
writableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
|
|
}, (reason) => {
|
|
abortRequest.deferred.reject(reason);
|
|
writableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
|
|
});
|
|
}
|
|
|
|
/** @param {WritableStream} stream */
|
|
function writableStreamFinishInFlightClose(stream) {
|
|
assert(stream[_inFlightCloseRequest] !== undefined);
|
|
stream[_inFlightCloseRequest].resolve(undefined);
|
|
stream[_inFlightCloseRequest] = undefined;
|
|
const state = stream[_state];
|
|
assert(state === "writable" || state === "erroring");
|
|
if (state === "erroring") {
|
|
stream[_storedError] = undefined;
|
|
if (stream[_pendingAbortRequest] !== undefined) {
|
|
stream[_pendingAbortRequest].deferred.resolve(undefined);
|
|
stream[_pendingAbortRequest] = undefined;
|
|
}
|
|
}
|
|
stream[_state] = "closed";
|
|
const writer = stream[_writer];
|
|
if (writer !== undefined) {
|
|
writer[_closedPromise].resolve(undefined);
|
|
}
|
|
assert(stream[_pendingAbortRequest] === undefined);
|
|
assert(stream[_storedError] === undefined);
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStream} stream
|
|
* @param {any=} error
|
|
*/
|
|
function writableStreamFinishInFlightCloseWithError(stream, error) {
|
|
assert(stream[_inFlightCloseRequest] !== undefined);
|
|
stream[_inFlightCloseRequest].reject(error);
|
|
stream[_inFlightCloseRequest] = undefined;
|
|
assert(stream[_state] === "writable" || stream[_state] === "erroring");
|
|
if (stream[_pendingAbortRequest] !== undefined) {
|
|
stream[_pendingAbortRequest].deferred.reject(error);
|
|
stream[_pendingAbortRequest] = undefined;
|
|
}
|
|
writableStreamDealWithRejection(stream, error);
|
|
}
|
|
|
|
/** @param {WritableStream} stream */
|
|
function writableStreamFinishInFlightWrite(stream) {
|
|
assert(stream[_inFlightWriteRequest] !== undefined);
|
|
stream[_inFlightWriteRequest].resolve(undefined);
|
|
stream[_inFlightWriteRequest] = undefined;
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStream} stream
|
|
* @param {any=} error
|
|
*/
|
|
function writableStreamFinishInFlightWriteWithError(stream, error) {
|
|
assert(stream[_inFlightWriteRequest] !== undefined);
|
|
stream[_inFlightWriteRequest].reject(error);
|
|
stream[_inFlightWriteRequest] = undefined;
|
|
assert(stream[_state] === "writable" || stream[_state] === "erroring");
|
|
writableStreamDealWithRejection(stream, error);
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStream} stream
|
|
* @returns {boolean}
|
|
*/
|
|
function writableStreamHasOperationMarkedInFlight(stream) {
|
|
if (
|
|
stream[_inFlightWriteRequest] === undefined &&
|
|
stream[_inFlightCloseRequest] === undefined
|
|
) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/** @param {WritableStream} stream */
|
|
function writableStreamMarkCloseRequestInFlight(stream) {
|
|
assert(stream[_inFlightCloseRequest] === undefined);
|
|
assert(stream[_closeRequest] !== undefined);
|
|
stream[_inFlightCloseRequest] = stream[_closeRequest];
|
|
stream[_closeRequest] = undefined;
|
|
}
|
|
|
|
/**
|
|
* @template W
|
|
* @param {WritableStream<W>} stream
|
|
*/
|
|
function writableStreamMarkFirstWriteRequestInFlight(stream) {
|
|
assert(stream[_inFlightWriteRequest] === undefined);
|
|
assert(stream[_writeRequests].length);
|
|
const writeRequest = ArrayPrototypeShift(stream[_writeRequests]);
|
|
stream[_inFlightWriteRequest] = writeRequest;
|
|
}
|
|
|
|
/** @param {WritableStream} stream */
|
|
function writableStreamRejectCloseAndClosedPromiseIfNeeded(stream) {
|
|
assert(stream[_state] === "errored");
|
|
if (stream[_closeRequest] !== undefined) {
|
|
assert(stream[_inFlightCloseRequest] === undefined);
|
|
stream[_closeRequest].reject(stream[_storedError]);
|
|
stream[_closeRequest] = undefined;
|
|
}
|
|
const writer = stream[_writer];
|
|
if (writer !== undefined) {
|
|
writer[_closedPromise].reject(stream[_storedError]);
|
|
setPromiseIsHandledToTrue(writer[_closedPromise].promise);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStream} stream
|
|
* @param {any=} reason
|
|
*/
|
|
function writableStreamStartErroring(stream, reason) {
|
|
assert(stream[_storedError] === undefined);
|
|
assert(stream[_state] === "writable");
|
|
const controller = stream[_controller];
|
|
assert(controller !== undefined);
|
|
stream[_state] = "erroring";
|
|
stream[_storedError] = reason;
|
|
const writer = stream[_writer];
|
|
if (writer !== undefined) {
|
|
writableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);
|
|
}
|
|
if (
|
|
writableStreamHasOperationMarkedInFlight(stream) === false &&
|
|
controller[_started] === true
|
|
) {
|
|
writableStreamFinishErroring(stream);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStream} stream
|
|
* @param {boolean} backpressure
|
|
*/
|
|
function writableStreamUpdateBackpressure(stream, backpressure) {
|
|
assert(stream[_state] === "writable");
|
|
assert(writableStreamCloseQueuedOrInFlight(stream) === false);
|
|
const writer = stream[_writer];
|
|
if (writer !== undefined && backpressure !== stream[_backpressure]) {
|
|
if (backpressure === true) {
|
|
writer[_readyPromise] = new Deferred();
|
|
} else {
|
|
assert(backpressure === false);
|
|
writer[_readyPromise].resolve(undefined);
|
|
}
|
|
}
|
|
stream[_backpressure] = backpressure;
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @param {T} value
|
|
* @param {boolean} done
|
|
* @returns {IteratorResult<T>}
|
|
*/
|
|
function createIteratorResult(value, done) {
|
|
const result = ObjectCreate(ObjectPrototype);
|
|
ObjectDefineProperties(result, {
|
|
value: { value, writable: true, enumerable: true, configurable: true },
|
|
done: {
|
|
value: done,
|
|
writable: true,
|
|
enumerable: true,
|
|
configurable: true,
|
|
},
|
|
});
|
|
return result;
|
|
}
|
|
|
|
/** @type {AsyncIterator<unknown, unknown>} */
|
|
const asyncIteratorPrototype = ObjectGetPrototypeOf(AsyncGeneratorPrototype);
|
|
|
|
const _iteratorNext = Symbol("[[iteratorNext]]");
|
|
const _iteratorFinished = Symbol("[[iteratorFinished]]");
|
|
|
|
/** @type {AsyncIterator<unknown>} */
|
|
const readableStreamAsyncIteratorPrototype = ObjectSetPrototypeOf({
|
|
/** @returns {Promise<IteratorResult<unknown>>} */
|
|
next() {
|
|
/** @type {ReadableStreamDefaultReader} */
|
|
const reader = this[_reader];
|
|
function nextSteps() {
|
|
if (reader[_iteratorFinished]) {
|
|
return PromiseResolve(createIteratorResult(undefined, true));
|
|
}
|
|
|
|
if (reader[_stream] === undefined) {
|
|
return PromiseReject(
|
|
new TypeError(
|
|
"Cannot get the next iteration result once the reader has been released.",
|
|
),
|
|
);
|
|
}
|
|
|
|
/** @type {Deferred<IteratorResult<any>>} */
|
|
const promise = new Deferred();
|
|
/** @type {ReadRequest} */
|
|
const readRequest = {
|
|
chunkSteps(chunk) {
|
|
promise.resolve(createIteratorResult(chunk, false));
|
|
},
|
|
closeSteps() {
|
|
readableStreamDefaultReaderRelease(reader);
|
|
promise.resolve(createIteratorResult(undefined, true));
|
|
},
|
|
errorSteps(e) {
|
|
readableStreamDefaultReaderRelease(reader);
|
|
promise.reject(e);
|
|
},
|
|
};
|
|
|
|
readableStreamDefaultReaderRead(reader, readRequest);
|
|
return PromisePrototypeThen(promise.promise, (result) => {
|
|
reader[_iteratorNext] = null;
|
|
if (result.done === true) {
|
|
reader[_iteratorFinished] = true;
|
|
return createIteratorResult(undefined, true);
|
|
}
|
|
return result;
|
|
}, (reason) => {
|
|
reader[_iteratorNext] = null;
|
|
reader[_iteratorFinished] = true;
|
|
throw reason;
|
|
});
|
|
}
|
|
|
|
reader[_iteratorNext] = reader[_iteratorNext]
|
|
? PromisePrototypeThen(reader[_iteratorNext], nextSteps, nextSteps)
|
|
: nextSteps();
|
|
|
|
return reader[_iteratorNext];
|
|
},
|
|
/**
|
|
* @param {unknown} arg
|
|
* @returns {Promise<IteratorResult<unknown>>}
|
|
*/
|
|
return(arg) {
|
|
/** @type {ReadableStreamDefaultReader} */
|
|
const reader = this[_reader];
|
|
const returnSteps = () => {
|
|
if (reader[_iteratorFinished]) {
|
|
return PromiseResolve(createIteratorResult(arg, true));
|
|
}
|
|
reader[_iteratorFinished] = true;
|
|
|
|
if (reader[_stream] === undefined) {
|
|
return PromiseResolve(createIteratorResult(undefined, true));
|
|
}
|
|
assert(reader[_readRequests].length === 0);
|
|
if (this[_preventCancel] === false) {
|
|
const result = readableStreamReaderGenericCancel(reader, arg);
|
|
readableStreamDefaultReaderRelease(reader);
|
|
return result;
|
|
}
|
|
readableStreamDefaultReaderRelease(reader);
|
|
return PromiseResolve(createIteratorResult(undefined, true));
|
|
};
|
|
|
|
const returnPromise = reader[_iteratorNext]
|
|
? PromisePrototypeThen(reader[_iteratorNext], returnSteps, returnSteps)
|
|
: returnSteps();
|
|
return PromisePrototypeThen(
|
|
returnPromise,
|
|
() => createIteratorResult(arg, true),
|
|
);
|
|
},
|
|
}, asyncIteratorPrototype);
|
|
|
|
class ByteLengthQueuingStrategy {
|
|
/** @param {{ highWaterMark: number }} init */
|
|
constructor(init) {
|
|
const prefix = "Failed to construct 'ByteLengthQueuingStrategy'";
|
|
webidl.requiredArguments(arguments.length, 1, prefix);
|
|
init = webidl.converters.QueuingStrategyInit(init, prefix, "Argument 1");
|
|
this[webidl.brand] = webidl.brand;
|
|
this[_globalObject] = globalThis;
|
|
this[_highWaterMark] = init.highWaterMark;
|
|
}
|
|
|
|
/** @returns {number} */
|
|
get highWaterMark() {
|
|
webidl.assertBranded(this, ByteLengthQueuingStrategyPrototype);
|
|
return this[_highWaterMark];
|
|
}
|
|
|
|
/** @returns {(chunk: ArrayBufferView) => number} */
|
|
get size() {
|
|
webidl.assertBranded(this, ByteLengthQueuingStrategyPrototype);
|
|
initializeByteLengthSizeFunction(this[_globalObject]);
|
|
return WeakMapPrototypeGet(byteSizeFunctionWeakMap, this[_globalObject]);
|
|
}
|
|
|
|
[SymbolFor("Deno.customInspect")](inspect) {
|
|
return inspect(createFilteredInspectProxy({
|
|
object: this,
|
|
evaluate: ObjectPrototypeIsPrototypeOf(
|
|
ByteLengthQueuingStrategyPrototype,
|
|
this,
|
|
),
|
|
keys: [
|
|
"highWaterMark",
|
|
"size",
|
|
],
|
|
}));
|
|
}
|
|
}
|
|
|
|
webidl.configurePrototype(ByteLengthQueuingStrategy);
|
|
const ByteLengthQueuingStrategyPrototype = ByteLengthQueuingStrategy.prototype;
|
|
|
|
/** @type {WeakMap<typeof globalThis, (chunk: ArrayBufferView) => number>} */
|
|
const byteSizeFunctionWeakMap = new SafeWeakMap();
|
|
|
|
function initializeByteLengthSizeFunction(globalObject) {
|
|
if (WeakMapPrototypeHas(byteSizeFunctionWeakMap, globalObject)) {
|
|
return;
|
|
}
|
|
// deno-lint-ignore prefer-primordials
|
|
const size = (chunk) => chunk.byteLength;
|
|
WeakMapPrototypeSet(byteSizeFunctionWeakMap, globalObject, size);
|
|
}
|
|
|
|
class CountQueuingStrategy {
|
|
/** @param {{ highWaterMark: number }} init */
|
|
constructor(init) {
|
|
const prefix = "Failed to construct 'CountQueuingStrategy'";
|
|
webidl.requiredArguments(arguments.length, 1, prefix);
|
|
init = webidl.converters.QueuingStrategyInit(init, prefix, "Argument 1");
|
|
this[webidl.brand] = webidl.brand;
|
|
this[_globalObject] = globalThis;
|
|
this[_highWaterMark] = init.highWaterMark;
|
|
}
|
|
|
|
/** @returns {number} */
|
|
get highWaterMark() {
|
|
webidl.assertBranded(this, CountQueuingStrategyPrototype);
|
|
return this[_highWaterMark];
|
|
}
|
|
|
|
/** @returns {(chunk: any) => 1} */
|
|
get size() {
|
|
webidl.assertBranded(this, CountQueuingStrategyPrototype);
|
|
initializeCountSizeFunction(this[_globalObject]);
|
|
return WeakMapPrototypeGet(countSizeFunctionWeakMap, this[_globalObject]);
|
|
}
|
|
|
|
[SymbolFor("Deno.customInspect")](inspect) {
|
|
return inspect(createFilteredInspectProxy({
|
|
object: this,
|
|
evaluate: ObjectPrototypeIsPrototypeOf(
|
|
CountQueuingStrategyPrototype,
|
|
this,
|
|
),
|
|
keys: [
|
|
"highWaterMark",
|
|
"size",
|
|
],
|
|
}));
|
|
}
|
|
}
|
|
|
|
webidl.configurePrototype(CountQueuingStrategy);
|
|
const CountQueuingStrategyPrototype = CountQueuingStrategy.prototype;
|
|
|
|
/** @type {WeakMap<typeof globalThis, () => 1>} */
|
|
const countSizeFunctionWeakMap = new SafeWeakMap();
|
|
|
|
/** @param {typeof globalThis} globalObject */
|
|
function initializeCountSizeFunction(globalObject) {
|
|
if (WeakMapPrototypeHas(countSizeFunctionWeakMap, globalObject)) {
|
|
return;
|
|
}
|
|
const size = () => 1;
|
|
WeakMapPrototypeSet(countSizeFunctionWeakMap, globalObject, size);
|
|
}
|
|
|
|
const _resourceBacking = Symbol("[[resourceBacking]]");
|
|
// This distinction exists to prevent unrefable streams being used in
|
|
// regular fast streams that are unaware of refability
|
|
const _resourceBackingUnrefable = Symbol("[[resourceBackingUnrefable]]");
|
|
/** @template R */
|
|
class ReadableStream {
|
|
/** @type {ReadableStreamDefaultController | ReadableByteStreamController} */
|
|
[_controller];
|
|
/** @type {boolean} */
|
|
[_detached];
|
|
/** @type {boolean} */
|
|
[_disturbed];
|
|
/** @type {ReadableStreamDefaultReader | ReadableStreamBYOBReader} */
|
|
[_reader];
|
|
/** @type {"readable" | "closed" | "errored"} */
|
|
[_state];
|
|
/** @type {any} */
|
|
[_storedError];
|
|
/** @type {{ rid: number, autoClose: boolean } | null} */
|
|
[_resourceBacking] = null;
|
|
|
|
/**
|
|
* @param {UnderlyingSource<R>=} underlyingSource
|
|
* @param {QueuingStrategy<R>=} strategy
|
|
*/
|
|
constructor(underlyingSource = undefined, strategy = undefined) {
|
|
const prefix = "Failed to construct 'ReadableStream'";
|
|
if (underlyingSource !== undefined) {
|
|
underlyingSource = webidl.converters.object(
|
|
underlyingSource,
|
|
prefix,
|
|
"Argument 1",
|
|
);
|
|
} else {
|
|
underlyingSource = null;
|
|
}
|
|
if (strategy !== undefined) {
|
|
strategy = webidl.converters.QueuingStrategy(
|
|
strategy,
|
|
prefix,
|
|
"Argument 2",
|
|
);
|
|
} else {
|
|
strategy = {};
|
|
}
|
|
this[webidl.brand] = webidl.brand;
|
|
let underlyingSourceDict = {};
|
|
if (underlyingSource !== undefined) {
|
|
underlyingSourceDict = webidl.converters.UnderlyingSource(
|
|
underlyingSource,
|
|
prefix,
|
|
"underlyingSource",
|
|
);
|
|
}
|
|
initializeReadableStream(this);
|
|
if (underlyingSourceDict.type === "bytes") {
|
|
if (strategy.size !== undefined) {
|
|
throw new RangeError(
|
|
`${prefix}: When underlying source is "bytes", strategy.size must be undefined.`,
|
|
);
|
|
}
|
|
const highWaterMark = extractHighWaterMark(strategy, 0);
|
|
setUpReadableByteStreamControllerFromUnderlyingSource(
|
|
// @ts-ignore cannot easily assert this is ReadableStream<ArrayBuffer>
|
|
this,
|
|
underlyingSource,
|
|
underlyingSourceDict,
|
|
highWaterMark,
|
|
);
|
|
} else {
|
|
assert(!(ReflectHas(underlyingSourceDict, "type")));
|
|
const sizeAlgorithm = extractSizeAlgorithm(strategy);
|
|
const highWaterMark = extractHighWaterMark(strategy, 1);
|
|
setUpReadableStreamDefaultControllerFromUnderlyingSource(
|
|
this,
|
|
underlyingSource,
|
|
underlyingSourceDict,
|
|
highWaterMark,
|
|
sizeAlgorithm,
|
|
);
|
|
}
|
|
}
|
|
|
|
/** @returns {boolean} */
|
|
get locked() {
|
|
webidl.assertBranded(this, ReadableStreamPrototype);
|
|
return isReadableStreamLocked(this);
|
|
}
|
|
|
|
/**
|
|
* @param {any=} reason
|
|
* @returns {Promise<void>}
|
|
*/
|
|
cancel(reason = undefined) {
|
|
try {
|
|
webidl.assertBranded(this, ReadableStreamPrototype);
|
|
if (reason !== undefined) {
|
|
reason = webidl.converters.any(reason);
|
|
}
|
|
} catch (err) {
|
|
return PromiseReject(err);
|
|
}
|
|
if (isReadableStreamLocked(this)) {
|
|
return PromiseReject(
|
|
new TypeError("Cannot cancel a locked ReadableStream."),
|
|
);
|
|
}
|
|
return readableStreamCancel(this, reason);
|
|
}
|
|
|
|
/**
|
|
* @param {ReadableStreamGetReaderOptions=} options
|
|
* @returns {ReadableStreamDefaultReader<R> | ReadableStreamBYOBReader}
|
|
*/
|
|
getReader(options = undefined) {
|
|
webidl.assertBranded(this, ReadableStreamPrototype);
|
|
const prefix = "Failed to execute 'getReader' on 'ReadableStream'";
|
|
if (options !== undefined) {
|
|
options = webidl.converters.ReadableStreamGetReaderOptions(
|
|
options,
|
|
prefix,
|
|
"Argument 1",
|
|
);
|
|
} else {
|
|
options = {};
|
|
}
|
|
if (options.mode === undefined) {
|
|
return acquireReadableStreamDefaultReader(this);
|
|
} else {
|
|
assert(options.mode === "byob");
|
|
return acquireReadableStreamBYOBReader(this);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @param {{ readable: ReadableStream<T>, writable: WritableStream<R> }} transform
|
|
* @param {PipeOptions=} options
|
|
* @returns {ReadableStream<T>}
|
|
*/
|
|
pipeThrough(transform, options = {}) {
|
|
webidl.assertBranded(this, ReadableStreamPrototype);
|
|
const prefix = "Failed to execute 'pipeThrough' on 'ReadableStream'";
|
|
webidl.requiredArguments(arguments.length, 1, prefix);
|
|
transform = webidl.converters.ReadableWritablePair(
|
|
transform,
|
|
prefix,
|
|
"Argument 1",
|
|
);
|
|
options = webidl.converters.StreamPipeOptions(
|
|
options,
|
|
prefix,
|
|
"Argument 2",
|
|
);
|
|
const { readable, writable } = transform;
|
|
const { preventClose, preventAbort, preventCancel, signal } = options;
|
|
if (isReadableStreamLocked(this)) {
|
|
throw new TypeError("ReadableStream is already locked.");
|
|
}
|
|
if (isWritableStreamLocked(writable)) {
|
|
throw new TypeError("Target WritableStream is already locked.");
|
|
}
|
|
const promise = readableStreamPipeTo(
|
|
this,
|
|
writable,
|
|
preventClose,
|
|
preventAbort,
|
|
preventCancel,
|
|
signal,
|
|
);
|
|
setPromiseIsHandledToTrue(promise);
|
|
return readable;
|
|
}
|
|
|
|
/**
|
|
* @param {WritableStream<R>} destination
|
|
* @param {PipeOptions=} options
|
|
* @returns {Promise<void>}
|
|
*/
|
|
pipeTo(destination, options = {}) {
|
|
try {
|
|
webidl.assertBranded(this, ReadableStreamPrototype);
|
|
const prefix = "Failed to execute 'pipeTo' on 'ReadableStream'";
|
|
webidl.requiredArguments(arguments.length, 1, prefix);
|
|
destination = webidl.converters.WritableStream(
|
|
destination,
|
|
prefix,
|
|
"Argument 1",
|
|
);
|
|
options = webidl.converters.StreamPipeOptions(
|
|
options,
|
|
prefix,
|
|
"Argument 2",
|
|
);
|
|
} catch (err) {
|
|
return PromiseReject(err);
|
|
}
|
|
const { preventClose, preventAbort, preventCancel, signal } = options;
|
|
if (isReadableStreamLocked(this)) {
|
|
return PromiseReject(
|
|
new TypeError("ReadableStream is already locked."),
|
|
);
|
|
}
|
|
if (isWritableStreamLocked(destination)) {
|
|
return PromiseReject(
|
|
new TypeError("destination WritableStream is already locked."),
|
|
);
|
|
}
|
|
return readableStreamPipeTo(
|
|
this,
|
|
destination,
|
|
preventClose,
|
|
preventAbort,
|
|
preventCancel,
|
|
signal,
|
|
);
|
|
}
|
|
|
|
/** @returns {[ReadableStream<R>, ReadableStream<R>]} */
|
|
tee() {
|
|
webidl.assertBranded(this, ReadableStreamPrototype);
|
|
return readableStreamTee(this, false);
|
|
}
|
|
|
|
// TODO(lucacasonato): should be moved to webidl crate
|
|
/**
|
|
* @param {ReadableStreamIteratorOptions=} options
|
|
* @returns {AsyncIterableIterator<R>}
|
|
*/
|
|
values(options = {}) {
|
|
webidl.assertBranded(this, ReadableStreamPrototype);
|
|
const prefix = "Failed to execute 'values' on 'ReadableStream'";
|
|
options = webidl.converters.ReadableStreamIteratorOptions(
|
|
options,
|
|
prefix,
|
|
"Argument 1",
|
|
);
|
|
/** @type {AsyncIterableIterator<R>} */
|
|
const iterator = ObjectCreate(readableStreamAsyncIteratorPrototype);
|
|
const reader = acquireReadableStreamDefaultReader(this);
|
|
iterator[_reader] = reader;
|
|
iterator[_preventCancel] = options.preventCancel;
|
|
return iterator;
|
|
}
|
|
|
|
[SymbolFor("Deno.privateCustomInspect")](inspect) {
|
|
return `${this.constructor.name} ${inspect({ locked: this.locked })}`;
|
|
}
|
|
}
|
|
|
|
// TODO(lucacasonato): should be moved to webidl crate
|
|
ReadableStream.prototype[SymbolAsyncIterator] = ReadableStream.prototype.values;
|
|
ObjectDefineProperty(ReadableStream.prototype, SymbolAsyncIterator, {
|
|
writable: true,
|
|
enumerable: false,
|
|
configurable: true,
|
|
});
|
|
|
|
webidl.configurePrototype(ReadableStream);
|
|
const ReadableStreamPrototype = ReadableStream.prototype;
|
|
|
|
function errorReadableStream(stream, e) {
|
|
readableStreamDefaultControllerError(stream[_controller], e);
|
|
}
|
|
|
|
/** @template R */
|
|
class ReadableStreamDefaultReader {
|
|
/** @type {Deferred<void>} */
|
|
[_closedPromise];
|
|
/** @type {ReadableStream<R> | undefined} */
|
|
[_stream];
|
|
/** @type {ReadRequest[]} */
|
|
[_readRequests];
|
|
|
|
/** @param {ReadableStream<R>} stream */
|
|
constructor(stream) {
|
|
const prefix = "Failed to construct 'ReadableStreamDefaultReader'";
|
|
webidl.requiredArguments(arguments.length, 1, prefix);
|
|
stream = webidl.converters.ReadableStream(stream, prefix, "Argument 1");
|
|
this[webidl.brand] = webidl.brand;
|
|
setUpReadableStreamDefaultReader(this, stream);
|
|
}
|
|
|
|
/** @returns {Promise<ReadableStreamReadResult<R>>} */
|
|
read() {
|
|
try {
|
|
webidl.assertBranded(this, ReadableStreamDefaultReaderPrototype);
|
|
} catch (err) {
|
|
return PromiseReject(err);
|
|
}
|
|
if (this[_stream] === undefined) {
|
|
return PromiseReject(
|
|
new TypeError("Reader has no associated stream."),
|
|
);
|
|
}
|
|
/** @type {Deferred<ReadableStreamReadResult<R>>} */
|
|
const promise = new Deferred();
|
|
/** @type {ReadRequest<R>} */
|
|
const readRequest = {
|
|
chunkSteps(chunk) {
|
|
promise.resolve({ value: chunk, done: false });
|
|
},
|
|
closeSteps() {
|
|
promise.resolve({ value: undefined, done: true });
|
|
},
|
|
errorSteps(e) {
|
|
promise.reject(e);
|
|
},
|
|
};
|
|
readableStreamDefaultReaderRead(this, readRequest);
|
|
return promise.promise;
|
|
}
|
|
|
|
/** @returns {void} */
|
|
releaseLock() {
|
|
webidl.assertBranded(this, ReadableStreamDefaultReaderPrototype);
|
|
if (this[_stream] === undefined) {
|
|
return;
|
|
}
|
|
readableStreamDefaultReaderRelease(this);
|
|
}
|
|
|
|
get closed() {
|
|
try {
|
|
webidl.assertBranded(this, ReadableStreamDefaultReaderPrototype);
|
|
} catch (err) {
|
|
return PromiseReject(err);
|
|
}
|
|
return this[_closedPromise].promise;
|
|
}
|
|
|
|
/**
|
|
* @param {any} reason
|
|
* @returns {Promise<void>}
|
|
*/
|
|
cancel(reason = undefined) {
|
|
try {
|
|
webidl.assertBranded(this, ReadableStreamDefaultReaderPrototype);
|
|
if (reason !== undefined) {
|
|
reason = webidl.converters.any(reason);
|
|
}
|
|
} catch (err) {
|
|
return PromiseReject(err);
|
|
}
|
|
|
|
if (this[_stream] === undefined) {
|
|
return PromiseReject(
|
|
new TypeError("Reader has no associated stream."),
|
|
);
|
|
}
|
|
return readableStreamReaderGenericCancel(this, reason);
|
|
}
|
|
|
|
[SymbolFor("Deno.privateCustomInspect")](inspect) {
|
|
return `${this.constructor.name} ${inspect({ closed: this.closed })}`;
|
|
}
|
|
}
|
|
|
|
webidl.configurePrototype(ReadableStreamDefaultReader);
|
|
const ReadableStreamDefaultReaderPrototype =
|
|
ReadableStreamDefaultReader.prototype;
|
|
|
|
/** @template R */
|
|
class ReadableStreamBYOBReader {
|
|
/** @type {Deferred<void>} */
|
|
[_closedPromise];
|
|
/** @type {ReadableStream<R> | undefined} */
|
|
[_stream];
|
|
/** @type {ReadIntoRequest[]} */
|
|
[_readIntoRequests];
|
|
|
|
/** @param {ReadableStream<R>} stream */
|
|
constructor(stream) {
|
|
const prefix = "Failed to construct 'ReadableStreamBYOBReader'";
|
|
webidl.requiredArguments(arguments.length, 1, prefix);
|
|
stream = webidl.converters.ReadableStream(stream, prefix, "Argument 1");
|
|
this[webidl.brand] = webidl.brand;
|
|
setUpReadableStreamBYOBReader(this, stream);
|
|
}
|
|
|
|
/**
|
|
* @param {ArrayBufferView} view
|
|
* @returns {Promise<ReadableStreamBYOBReadResult>}
|
|
*/
|
|
read(view) {
|
|
try {
|
|
webidl.assertBranded(this, ReadableStreamBYOBReaderPrototype);
|
|
const prefix = "Failed to execute 'read' on 'ReadableStreamBYOBReader'";
|
|
view = webidl.converters.ArrayBufferView(view, prefix, "Argument 1");
|
|
} catch (err) {
|
|
return PromiseReject(err);
|
|
}
|
|
|
|
let buffer, byteLength;
|
|
if (TypedArrayPrototypeGetSymbolToStringTag(view) === undefined) {
|
|
buffer = DataViewPrototypeGetBuffer(/** @type {DataView} */ (view));
|
|
byteLength = DataViewPrototypeGetByteLength(
|
|
/** @type {DataView} */ (view),
|
|
);
|
|
} else {
|
|
buffer = TypedArrayPrototypeGetBuffer(/** @type {Uint8Array} */ (view));
|
|
byteLength = TypedArrayPrototypeGetByteLength(
|
|
/** @type {Uint8Array} */ (view),
|
|
);
|
|
}
|
|
if (byteLength === 0) {
|
|
return PromiseReject(
|
|
new TypeError("view must have non-zero byteLength"),
|
|
);
|
|
}
|
|
if (getArrayBufferByteLength(buffer) === 0) {
|
|
return PromiseReject(
|
|
new TypeError("view's buffer must have non-zero byteLength"),
|
|
);
|
|
}
|
|
if (isDetachedBuffer(buffer)) {
|
|
return PromiseReject(
|
|
new TypeError("view's buffer has been detached"),
|
|
);
|
|
}
|
|
if (this[_stream] === undefined) {
|
|
return PromiseReject(
|
|
new TypeError("Reader has no associated stream."),
|
|
);
|
|
}
|
|
/** @type {Deferred<ReadableStreamBYOBReadResult>} */
|
|
const promise = new Deferred();
|
|
/** @type {ReadIntoRequest} */
|
|
const readIntoRequest = {
|
|
chunkSteps(chunk) {
|
|
promise.resolve({ value: chunk, done: false });
|
|
},
|
|
closeSteps(chunk) {
|
|
promise.resolve({ value: chunk, done: true });
|
|
},
|
|
errorSteps(e) {
|
|
promise.reject(e);
|
|
},
|
|
};
|
|
readableStreamBYOBReaderRead(this, view, readIntoRequest);
|
|
return promise.promise;
|
|
}
|
|
|
|
/** @returns {void} */
|
|
releaseLock() {
|
|
webidl.assertBranded(this, ReadableStreamBYOBReaderPrototype);
|
|
if (this[_stream] === undefined) {
|
|
return;
|
|
}
|
|
readableStreamBYOBReaderRelease(this);
|
|
}
|
|
|
|
get closed() {
|
|
try {
|
|
webidl.assertBranded(this, ReadableStreamBYOBReaderPrototype);
|
|
} catch (err) {
|
|
return PromiseReject(err);
|
|
}
|
|
return this[_closedPromise].promise;
|
|
}
|
|
|
|
/**
|
|
* @param {any} reason
|
|
* @returns {Promise<void>}
|
|
*/
|
|
cancel(reason = undefined) {
|
|
try {
|
|
webidl.assertBranded(this, ReadableStreamBYOBReaderPrototype);
|
|
if (reason !== undefined) {
|
|
reason = webidl.converters.any(reason);
|
|
}
|
|
} catch (err) {
|
|
return PromiseReject(err);
|
|
}
|
|
|
|
if (this[_stream] === undefined) {
|
|
return PromiseReject(
|
|
new TypeError("Reader has no associated stream."),
|
|
);
|
|
}
|
|
return readableStreamReaderGenericCancel(this, reason);
|
|
}
|
|
|
|
[SymbolFor("Deno.privateCustomInspect")](inspect) {
|
|
return `${this.constructor.name} ${inspect({ closed: this.closed })}`;
|
|
}
|
|
}
|
|
|
|
webidl.configurePrototype(ReadableStreamBYOBReader);
|
|
const ReadableStreamBYOBReaderPrototype = ReadableStreamBYOBReader.prototype;
|
|
|
|
class ReadableStreamBYOBRequest {
|
|
/** @type {ReadableByteStreamController} */
|
|
[_controller];
|
|
/** @type {ArrayBufferView | null} */
|
|
[_view];
|
|
|
|
/** @returns {ArrayBufferView | null} */
|
|
get view() {
|
|
webidl.assertBranded(this, ReadableStreamBYOBRequestPrototype);
|
|
return this[_view];
|
|
}
|
|
|
|
constructor() {
|
|
webidl.illegalConstructor();
|
|
}
|
|
|
|
respond(bytesWritten) {
|
|
webidl.assertBranded(this, ReadableStreamBYOBRequestPrototype);
|
|
const prefix = "Failed to execute 'respond' on 'ReadableStreamBYOBRequest'";
|
|
webidl.requiredArguments(arguments.length, 1, prefix);
|
|
bytesWritten = webidl.converters["unsigned long long"](
|
|
bytesWritten,
|
|
prefix,
|
|
"Argument 1",
|
|
{
|
|
enforceRange: true,
|
|
},
|
|
);
|
|
|
|
if (this[_controller] === undefined) {
|
|
throw new TypeError("This BYOB request has been invalidated");
|
|
}
|
|
|
|
let buffer, byteLength;
|
|
if (TypedArrayPrototypeGetSymbolToStringTag(this[_view]) === undefined) {
|
|
buffer = DataViewPrototypeGetBuffer(this[_view]);
|
|
byteLength = DataViewPrototypeGetByteLength(this[_view]);
|
|
} else {
|
|
buffer = TypedArrayPrototypeGetBuffer(this[_view]);
|
|
byteLength = TypedArrayPrototypeGetByteLength(this[_view]);
|
|
}
|
|
if (isDetachedBuffer(buffer)) {
|
|
throw new TypeError(
|
|
"The BYOB request's buffer has been detached and so cannot be used as a response",
|
|
);
|
|
}
|
|
assert(byteLength > 0);
|
|
assert(getArrayBufferByteLength(buffer) > 0);
|
|
readableByteStreamControllerRespond(this[_controller], bytesWritten);
|
|
}
|
|
|
|
respondWithNewView(view) {
|
|
webidl.assertBranded(this, ReadableStreamBYOBRequestPrototype);
|
|
const prefix =
|
|
"Failed to execute 'respondWithNewView' on 'ReadableStreamBYOBRequest'";
|
|
webidl.requiredArguments(arguments.length, 1, prefix);
|
|
view = webidl.converters.ArrayBufferView(view, prefix, "Argument 1");
|
|
|
|
if (this[_controller] === undefined) {
|
|
throw new TypeError("This BYOB request has been invalidated");
|
|
}
|
|
|
|
let buffer;
|
|
if (TypedArrayPrototypeGetSymbolToStringTag(view) === undefined) {
|
|
buffer = DataViewPrototypeGetBuffer(view);
|
|
} else {
|
|
buffer = TypedArrayPrototypeGetBuffer(view);
|
|
}
|
|
if (isDetachedBuffer(buffer)) {
|
|
throw new TypeError(
|
|
"The given view's buffer has been detached and so cannot be used as a response",
|
|
);
|
|
}
|
|
readableByteStreamControllerRespondWithNewView(this[_controller], view);
|
|
}
|
|
}
|
|
|
|
webidl.configurePrototype(ReadableStreamBYOBRequest);
|
|
const ReadableStreamBYOBRequestPrototype = ReadableStreamBYOBRequest.prototype;
|
|
|
|
class ReadableByteStreamController {
|
|
/** @type {number | undefined} */
|
|
[_autoAllocateChunkSize];
|
|
/** @type {ReadableStreamBYOBRequest | null} */
|
|
[_byobRequest];
|
|
/** @type {(reason: any) => Promise<void>} */
|
|
[_cancelAlgorithm];
|
|
/** @type {boolean} */
|
|
[_closeRequested];
|
|
/** @type {boolean} */
|
|
[_pullAgain];
|
|
/** @type {(controller: this) => Promise<void>} */
|
|
[_pullAlgorithm];
|
|
/** @type {boolean} */
|
|
[_pulling];
|
|
/** @type {PullIntoDescriptor[]} */
|
|
[_pendingPullIntos];
|
|
/** @type {ReadableByteStreamQueueEntry[]} */
|
|
[_queue];
|
|
/** @type {number} */
|
|
[_queueTotalSize];
|
|
/** @type {boolean} */
|
|
[_started];
|
|
/** @type {number} */
|
|
[_strategyHWM];
|
|
/** @type {ReadableStream<ArrayBuffer>} */
|
|
[_stream];
|
|
|
|
constructor() {
|
|
webidl.illegalConstructor();
|
|
}
|
|
|
|
/** @returns {ReadableStreamBYOBRequest | null} */
|
|
get byobRequest() {
|
|
webidl.assertBranded(this, ReadableByteStreamControllerPrototype);
|
|
return readableByteStreamControllerGetBYOBRequest(this);
|
|
}
|
|
|
|
/** @returns {number | null} */
|
|
get desiredSize() {
|
|
webidl.assertBranded(this, ReadableByteStreamControllerPrototype);
|
|
return readableByteStreamControllerGetDesiredSize(this);
|
|
}
|
|
|
|
/** @returns {void} */
|
|
close() {
|
|
webidl.assertBranded(this, ReadableByteStreamControllerPrototype);
|
|
if (this[_closeRequested] === true) {
|
|
throw new TypeError("Closed already requested.");
|
|
}
|
|
if (this[_stream][_state] !== "readable") {
|
|
throw new TypeError(
|
|
"ReadableByteStreamController's stream is not in a readable state.",
|
|
);
|
|
}
|
|
readableByteStreamControllerClose(this);
|
|
}
|
|
|
|
/**
|
|
* @param {ArrayBufferView} chunk
|
|
* @returns {void}
|
|
*/
|
|
enqueue(chunk) {
|
|
webidl.assertBranded(this, ReadableByteStreamControllerPrototype);
|
|
const prefix =
|
|
"Failed to execute 'enqueue' on 'ReadableByteStreamController'";
|
|
webidl.requiredArguments(arguments.length, 1, prefix);
|
|
const arg1 = "Argument 1";
|
|
chunk = webidl.converters.ArrayBufferView(chunk, prefix, arg1);
|
|
let buffer, byteLength;
|
|
if (TypedArrayPrototypeGetSymbolToStringTag(chunk) === undefined) {
|
|
buffer = DataViewPrototypeGetBuffer(/** @type {DataView} */ (chunk));
|
|
byteLength = DataViewPrototypeGetByteLength(
|
|
/** @type {DataView} */ (chunk),
|
|
);
|
|
} else {
|
|
buffer = TypedArrayPrototypeGetBuffer(/** @type {Uint8Array} */ (chunk));
|
|
byteLength = TypedArrayPrototypeGetByteLength(
|
|
/** @type {Uint8Array} */ (chunk),
|
|
);
|
|
}
|
|
if (byteLength === 0) {
|
|
throw webidl.makeException(
|
|
TypeError,
|
|
"length must be non-zero",
|
|
prefix,
|
|
arg1,
|
|
);
|
|
}
|
|
if (getArrayBufferByteLength(buffer) === 0) {
|
|
throw webidl.makeException(
|
|
TypeError,
|
|
"buffer length must be non-zero",
|
|
prefix,
|
|
arg1,
|
|
);
|
|
}
|
|
if (this[_closeRequested] === true) {
|
|
throw new TypeError(
|
|
"Cannot enqueue chunk after a close has been requested.",
|
|
);
|
|
}
|
|
if (this[_stream][_state] !== "readable") {
|
|
throw new TypeError(
|
|
"Cannot enqueue chunk when underlying stream is not readable.",
|
|
);
|
|
}
|
|
return readableByteStreamControllerEnqueue(this, chunk);
|
|
}
|
|
|
|
/**
|
|
* @param {any=} e
|
|
* @returns {void}
|
|
*/
|
|
error(e = undefined) {
|
|
webidl.assertBranded(this, ReadableByteStreamControllerPrototype);
|
|
if (e !== undefined) {
|
|
e = webidl.converters.any(e);
|
|
}
|
|
readableByteStreamControllerError(this, e);
|
|
}
|
|
|
|
[SymbolFor("Deno.customInspect")](inspect) {
|
|
return inspect(createFilteredInspectProxy({
|
|
object: this,
|
|
evaluate: ObjectPrototypeIsPrototypeOf(
|
|
ReadableByteStreamControllerPrototype,
|
|
this,
|
|
),
|
|
keys: ["desiredSize"],
|
|
}));
|
|
}
|
|
|
|
/**
|
|
* @param {any} reason
|
|
* @returns {Promise<void>}
|
|
*/
|
|
[_cancelSteps](reason) {
|
|
readableByteStreamControllerClearPendingPullIntos(this);
|
|
resetQueue(this);
|
|
const result = this[_cancelAlgorithm](reason);
|
|
readableByteStreamControllerClearAlgorithms(this);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* @param {ReadRequest<ArrayBuffer>} readRequest
|
|
* @returns {void}
|
|
*/
|
|
[_pullSteps](readRequest) {
|
|
/** @type {ReadableStream<ArrayBuffer>} */
|
|
const stream = this[_stream];
|
|
assert(readableStreamHasDefaultReader(stream));
|
|
if (this[_queueTotalSize] > 0) {
|
|
assert(readableStreamGetNumReadRequests(stream) === 0);
|
|
readableByteStreamControllerFillReadRequestFromQueue(this, readRequest);
|
|
return;
|
|
}
|
|
const autoAllocateChunkSize = this[_autoAllocateChunkSize];
|
|
if (autoAllocateChunkSize !== undefined) {
|
|
let buffer;
|
|
try {
|
|
buffer = new ArrayBuffer(autoAllocateChunkSize);
|
|
} catch (e) {
|
|
readRequest.errorSteps(e);
|
|
return;
|
|
}
|
|
/** @type {PullIntoDescriptor} */
|
|
const pullIntoDescriptor = {
|
|
buffer,
|
|
bufferByteLength: autoAllocateChunkSize,
|
|
byteOffset: 0,
|
|
byteLength: autoAllocateChunkSize,
|
|
bytesFilled: 0,
|
|
elementSize: 1,
|
|
viewConstructor: Uint8Array,
|
|
readerType: "default",
|
|
};
|
|
ArrayPrototypePush(this[_pendingPullIntos], pullIntoDescriptor);
|
|
}
|
|
readableStreamAddReadRequest(stream, readRequest);
|
|
readableByteStreamControllerCallPullIfNeeded(this);
|
|
}
|
|
|
|
[_releaseSteps]() {
|
|
if (this[_pendingPullIntos].length !== 0) {
|
|
/** @type {PullIntoDescriptor} */
|
|
const firstPendingPullInto = this[_pendingPullIntos][0];
|
|
firstPendingPullInto.readerType = "none";
|
|
this[_pendingPullIntos] = [firstPendingPullInto];
|
|
}
|
|
}
|
|
}
|
|
|
|
webidl.configurePrototype(ReadableByteStreamController);
|
|
const ReadableByteStreamControllerPrototype =
|
|
ReadableByteStreamController.prototype;
|
|
|
|
/** @template R */
|
|
class ReadableStreamDefaultController {
|
|
/** @type {(reason: any) => Promise<void>} */
|
|
[_cancelAlgorithm];
|
|
/** @type {boolean} */
|
|
[_closeRequested];
|
|
/** @type {boolean} */
|
|
[_pullAgain];
|
|
/** @type {(controller: this) => Promise<void>} */
|
|
[_pullAlgorithm];
|
|
/** @type {boolean} */
|
|
[_pulling];
|
|
/** @type {Array<ValueWithSize<R>>} */
|
|
[_queue];
|
|
/** @type {number} */
|
|
[_queueTotalSize];
|
|
/** @type {boolean} */
|
|
[_started];
|
|
/** @type {number} */
|
|
[_strategyHWM];
|
|
/** @type {(chunk: R) => number} */
|
|
[_strategySizeAlgorithm];
|
|
/** @type {ReadableStream<R>} */
|
|
[_stream];
|
|
|
|
constructor() {
|
|
webidl.illegalConstructor();
|
|
}
|
|
|
|
/** @returns {number | null} */
|
|
get desiredSize() {
|
|
webidl.assertBranded(this, ReadableStreamDefaultControllerPrototype);
|
|
return readableStreamDefaultControllerGetDesiredSize(this);
|
|
}
|
|
|
|
/** @returns {void} */
|
|
close() {
|
|
webidl.assertBranded(this, ReadableStreamDefaultControllerPrototype);
|
|
if (readableStreamDefaultControllerCanCloseOrEnqueue(this) === false) {
|
|
throw new TypeError("The stream controller cannot close or enqueue.");
|
|
}
|
|
readableStreamDefaultControllerClose(this);
|
|
}
|
|
|
|
/**
|
|
* @param {R} chunk
|
|
* @returns {void}
|
|
*/
|
|
enqueue(chunk = undefined) {
|
|
webidl.assertBranded(this, ReadableStreamDefaultControllerPrototype);
|
|
if (chunk !== undefined) {
|
|
chunk = webidl.converters.any(chunk);
|
|
}
|
|
if (readableStreamDefaultControllerCanCloseOrEnqueue(this) === false) {
|
|
throw new TypeError("The stream controller cannot close or enqueue.");
|
|
}
|
|
readableStreamDefaultControllerEnqueue(this, chunk);
|
|
}
|
|
|
|
/**
|
|
* @param {any=} e
|
|
* @returns {void}
|
|
*/
|
|
error(e = undefined) {
|
|
webidl.assertBranded(this, ReadableStreamDefaultControllerPrototype);
|
|
if (e !== undefined) {
|
|
e = webidl.converters.any(e);
|
|
}
|
|
readableStreamDefaultControllerError(this, e);
|
|
}
|
|
|
|
[SymbolFor("Deno.customInspect")](inspect) {
|
|
return inspect(createFilteredInspectProxy({
|
|
object: this,
|
|
evaluate: ObjectPrototypeIsPrototypeOf(
|
|
ReadableStreamDefaultController.prototype,
|
|
this,
|
|
),
|
|
keys: ["desiredSize"],
|
|
}));
|
|
}
|
|
|
|
/**
|
|
* @param {any} reason
|
|
* @returns {Promise<void>}
|
|
*/
|
|
[_cancelSteps](reason) {
|
|
resetQueue(this);
|
|
const result = this[_cancelAlgorithm](reason);
|
|
readableStreamDefaultControllerClearAlgorithms(this);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* @param {ReadRequest<R>} readRequest
|
|
* @returns {void}
|
|
*/
|
|
[_pullSteps](readRequest) {
|
|
const stream = this[_stream];
|
|
if (this[_queue].length) {
|
|
const chunk = dequeueValue(this);
|
|
if (this[_closeRequested] && this[_queue].length === 0) {
|
|
readableStreamDefaultControllerClearAlgorithms(this);
|
|
readableStreamClose(stream);
|
|
} else {
|
|
readableStreamDefaultControllerCallPullIfNeeded(this);
|
|
}
|
|
readRequest.chunkSteps(chunk);
|
|
} else {
|
|
readableStreamAddReadRequest(stream, readRequest);
|
|
readableStreamDefaultControllerCallPullIfNeeded(this);
|
|
}
|
|
}
|
|
|
|
[_releaseSteps]() {
|
|
return;
|
|
}
|
|
}
|
|
|
|
webidl.configurePrototype(ReadableStreamDefaultController);
|
|
const ReadableStreamDefaultControllerPrototype =
|
|
ReadableStreamDefaultController.prototype;
|
|
|
|
/**
|
|
* @template I
|
|
* @template O
|
|
*/
|
|
class TransformStream {
|
|
/** @type {boolean} */
|
|
[_backpressure];
|
|
/** @type {Deferred<void>} */
|
|
[_backpressureChangePromise];
|
|
/** @type {TransformStreamDefaultController<O>} */
|
|
[_controller];
|
|
/** @type {boolean} */
|
|
[_detached];
|
|
/** @type {ReadableStream<O>} */
|
|
[_readable];
|
|
/** @type {WritableStream<I>} */
|
|
[_writable];
|
|
|
|
/**
|
|
* @param {Transformer<I, O>} transformer
|
|
* @param {QueuingStrategy<I>} writableStrategy
|
|
* @param {QueuingStrategy<O>} readableStrategy
|
|
*/
|
|
constructor(
|
|
transformer = undefined,
|
|
writableStrategy = {},
|
|
readableStrategy = {},
|
|
) {
|
|
const prefix = "Failed to construct 'TransformStream'";
|
|
if (transformer !== undefined) {
|
|
transformer = webidl.converters.object(transformer, prefix, "Argument 1");
|
|
}
|
|
writableStrategy = webidl.converters.QueuingStrategy(
|
|
writableStrategy,
|
|
prefix,
|
|
"Argument 2",
|
|
);
|
|
readableStrategy = webidl.converters.QueuingStrategy(
|
|
readableStrategy,
|
|
prefix,
|
|
"Argument 3",
|
|
);
|
|
this[webidl.brand] = webidl.brand;
|
|
if (transformer === undefined) {
|
|
transformer = null;
|
|
}
|
|
const transformerDict = webidl.converters.Transformer(
|
|
transformer,
|
|
prefix,
|
|
"transformer",
|
|
);
|
|
if (transformerDict.readableType !== undefined) {
|
|
throw new RangeError(
|
|
`${prefix}: readableType transformers not supported.`,
|
|
);
|
|
}
|
|
if (transformerDict.writableType !== undefined) {
|
|
throw new RangeError(
|
|
`${prefix}: writableType transformers not supported.`,
|
|
);
|
|
}
|
|
const readableHighWaterMark = extractHighWaterMark(readableStrategy, 0);
|
|
const readableSizeAlgorithm = extractSizeAlgorithm(readableStrategy);
|
|
const writableHighWaterMark = extractHighWaterMark(writableStrategy, 1);
|
|
const writableSizeAlgorithm = extractSizeAlgorithm(writableStrategy);
|
|
/** @type {Deferred<void>} */
|
|
const startPromise = new Deferred();
|
|
initializeTransformStream(
|
|
this,
|
|
startPromise,
|
|
writableHighWaterMark,
|
|
writableSizeAlgorithm,
|
|
readableHighWaterMark,
|
|
readableSizeAlgorithm,
|
|
);
|
|
setUpTransformStreamDefaultControllerFromTransformer(
|
|
this,
|
|
transformer,
|
|
transformerDict,
|
|
);
|
|
if (transformerDict.start) {
|
|
startPromise.resolve(
|
|
webidl.invokeCallbackFunction(
|
|
transformerDict.start,
|
|
[this[_controller]],
|
|
transformer,
|
|
webidl.converters.any,
|
|
"Failed to call 'start' on 'TransformStreamDefaultController'",
|
|
),
|
|
);
|
|
} else {
|
|
startPromise.resolve(undefined);
|
|
}
|
|
}
|
|
|
|
/** @returns {ReadableStream<O>} */
|
|
get readable() {
|
|
webidl.assertBranded(this, TransformStreamPrototype);
|
|
return this[_readable];
|
|
}
|
|
|
|
/** @returns {WritableStream<I>} */
|
|
get writable() {
|
|
webidl.assertBranded(this, TransformStreamPrototype);
|
|
return this[_writable];
|
|
}
|
|
|
|
[SymbolFor("Deno.privateCustomInspect")](inspect) {
|
|
return `${this.constructor.name} ${
|
|
inspect({ readable: this.readable, writable: this.writable })
|
|
}`;
|
|
}
|
|
}
|
|
|
|
webidl.configurePrototype(TransformStream);
|
|
const TransformStreamPrototype = TransformStream.prototype;
|
|
|
|
/** @template O */
|
|
class TransformStreamDefaultController {
|
|
/** @type {(controller: this) => Promise<void>} */
|
|
[_flushAlgorithm];
|
|
/** @type {TransformStream<O>} */
|
|
[_stream];
|
|
/** @type {(chunk: O, controller: this) => Promise<void>} */
|
|
[_transformAlgorithm];
|
|
|
|
constructor() {
|
|
webidl.illegalConstructor();
|
|
}
|
|
|
|
/** @returns {number | null} */
|
|
get desiredSize() {
|
|
webidl.assertBranded(this, TransformStreamDefaultController.prototype);
|
|
const readableController = this[_stream][_readable][_controller];
|
|
return readableStreamDefaultControllerGetDesiredSize(
|
|
/** @type {ReadableStreamDefaultController<O>} */ readableController,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @param {O} chunk
|
|
* @returns {void}
|
|
*/
|
|
enqueue(chunk = undefined) {
|
|
webidl.assertBranded(this, TransformStreamDefaultController.prototype);
|
|
if (chunk !== undefined) {
|
|
chunk = webidl.converters.any(chunk);
|
|
}
|
|
transformStreamDefaultControllerEnqueue(this, chunk);
|
|
}
|
|
|
|
/**
|
|
* @param {any=} reason
|
|
* @returns {void}
|
|
*/
|
|
error(reason = undefined) {
|
|
webidl.assertBranded(this, TransformStreamDefaultController.prototype);
|
|
if (reason !== undefined) {
|
|
reason = webidl.converters.any(reason);
|
|
}
|
|
transformStreamDefaultControllerError(this, reason);
|
|
}
|
|
|
|
/** @returns {void} */
|
|
terminate() {
|
|
webidl.assertBranded(this, TransformStreamDefaultControllerPrototype);
|
|
transformStreamDefaultControllerTerminate(this);
|
|
}
|
|
|
|
[SymbolFor("Deno.customInspect")](inspect) {
|
|
return inspect(createFilteredInspectProxy({
|
|
object: this,
|
|
evaluate: ObjectPrototypeIsPrototypeOf(
|
|
TransformStreamDefaultController.prototype,
|
|
this,
|
|
),
|
|
keys: ["desiredSize"],
|
|
}));
|
|
}
|
|
}
|
|
|
|
webidl.configurePrototype(TransformStreamDefaultController);
|
|
const TransformStreamDefaultControllerPrototype =
|
|
TransformStreamDefaultController.prototype;
|
|
|
|
/** @template W */
|
|
class WritableStream {
|
|
/** @type {boolean} */
|
|
[_backpressure];
|
|
/** @type {Deferred<void> | undefined} */
|
|
[_closeRequest];
|
|
/** @type {WritableStreamDefaultController<W>} */
|
|
[_controller];
|
|
/** @type {boolean} */
|
|
[_detached];
|
|
/** @type {Deferred<void> | undefined} */
|
|
[_inFlightWriteRequest];
|
|
/** @type {Deferred<void> | undefined} */
|
|
[_inFlightCloseRequest];
|
|
/** @type {PendingAbortRequest | undefined} */
|
|
[_pendingAbortRequest];
|
|
/** @type {"writable" | "closed" | "erroring" | "errored"} */
|
|
[_state];
|
|
/** @type {any} */
|
|
[_storedError];
|
|
/** @type {WritableStreamDefaultWriter<W>} */
|
|
[_writer];
|
|
/** @type {Deferred<void>[]} */
|
|
[_writeRequests];
|
|
|
|
/**
|
|
* @param {UnderlyingSink<W>=} underlyingSink
|
|
* @param {QueuingStrategy<W>=} strategy
|
|
*/
|
|
constructor(underlyingSink = undefined, strategy = {}) {
|
|
const prefix = "Failed to construct 'WritableStream'";
|
|
if (underlyingSink !== undefined) {
|
|
underlyingSink = webidl.converters.object(
|
|
underlyingSink,
|
|
prefix,
|
|
"Argument 1",
|
|
);
|
|
}
|
|
strategy = webidl.converters.QueuingStrategy(
|
|
strategy,
|
|
prefix,
|
|
"Argument 2",
|
|
);
|
|
this[webidl.brand] = webidl.brand;
|
|
if (underlyingSink === undefined) {
|
|
underlyingSink = null;
|
|
}
|
|
const underlyingSinkDict = webidl.converters.UnderlyingSink(
|
|
underlyingSink,
|
|
prefix,
|
|
"underlyingSink",
|
|
);
|
|
if (underlyingSinkDict.type != null) {
|
|
throw new RangeError(
|
|
`${prefix}: WritableStream does not support 'type' in the underlying sink.`,
|
|
);
|
|
}
|
|
initializeWritableStream(this);
|
|
const sizeAlgorithm = extractSizeAlgorithm(strategy);
|
|
const highWaterMark = extractHighWaterMark(strategy, 1);
|
|
setUpWritableStreamDefaultControllerFromUnderlyingSink(
|
|
this,
|
|
underlyingSink,
|
|
underlyingSinkDict,
|
|
highWaterMark,
|
|
sizeAlgorithm,
|
|
);
|
|
}
|
|
|
|
/** @returns {boolean} */
|
|
get locked() {
|
|
webidl.assertBranded(this, WritableStreamPrototype);
|
|
return isWritableStreamLocked(this);
|
|
}
|
|
|
|
/**
|
|
* @param {any=} reason
|
|
* @returns {Promise<void>}
|
|
*/
|
|
abort(reason = undefined) {
|
|
try {
|
|
webidl.assertBranded(this, WritableStreamPrototype);
|
|
} catch (err) {
|
|
return PromiseReject(err);
|
|
}
|
|
if (reason !== undefined) {
|
|
reason = webidl.converters.any(reason);
|
|
}
|
|
if (isWritableStreamLocked(this)) {
|
|
return PromiseReject(
|
|
new TypeError(
|
|
"The writable stream is locked, therefore cannot be aborted.",
|
|
),
|
|
);
|
|
}
|
|
return writableStreamAbort(this, reason);
|
|
}
|
|
|
|
/** @returns {Promise<void>} */
|
|
close() {
|
|
try {
|
|
webidl.assertBranded(this, WritableStreamPrototype);
|
|
} catch (err) {
|
|
return PromiseReject(err);
|
|
}
|
|
if (isWritableStreamLocked(this)) {
|
|
return PromiseReject(
|
|
new TypeError(
|
|
"The writable stream is locked, therefore cannot be closed.",
|
|
),
|
|
);
|
|
}
|
|
if (writableStreamCloseQueuedOrInFlight(this) === true) {
|
|
return PromiseReject(
|
|
new TypeError("The writable stream is already closing."),
|
|
);
|
|
}
|
|
return writableStreamClose(this);
|
|
}
|
|
|
|
/** @returns {WritableStreamDefaultWriter<W>} */
|
|
getWriter() {
|
|
webidl.assertBranded(this, WritableStreamPrototype);
|
|
return acquireWritableStreamDefaultWriter(this);
|
|
}
|
|
|
|
[SymbolFor("Deno.privateCustomInspect")](inspect) {
|
|
return `${this.constructor.name} ${inspect({ locked: this.locked })}`;
|
|
}
|
|
}
|
|
|
|
webidl.configurePrototype(WritableStream);
|
|
const WritableStreamPrototype = WritableStream.prototype;
|
|
|
|
/** @template W */
|
|
class WritableStreamDefaultWriter {
|
|
/** @type {Deferred<void>} */
|
|
[_closedPromise];
|
|
|
|
/** @type {Deferred<void>} */
|
|
[_readyPromise];
|
|
|
|
/** @type {WritableStream<W>} */
|
|
[_stream];
|
|
|
|
/**
|
|
* @param {WritableStream<W>} stream
|
|
*/
|
|
constructor(stream) {
|
|
const prefix = "Failed to construct 'WritableStreamDefaultWriter'";
|
|
webidl.requiredArguments(arguments.length, 1, prefix);
|
|
stream = webidl.converters.WritableStream(stream, prefix, "Argument 1");
|
|
this[webidl.brand] = webidl.brand;
|
|
setUpWritableStreamDefaultWriter(this, stream);
|
|
}
|
|
|
|
/** @returns {Promise<void>} */
|
|
get closed() {
|
|
try {
|
|
webidl.assertBranded(this, WritableStreamDefaultWriterPrototype);
|
|
} catch (err) {
|
|
return PromiseReject(err);
|
|
}
|
|
return this[_closedPromise].promise;
|
|
}
|
|
|
|
/** @returns {number} */
|
|
get desiredSize() {
|
|
webidl.assertBranded(this, WritableStreamDefaultWriterPrototype);
|
|
if (this[_stream] === undefined) {
|
|
throw new TypeError(
|
|
"A writable stream is not associated with the writer.",
|
|
);
|
|
}
|
|
return writableStreamDefaultWriterGetDesiredSize(this);
|
|
}
|
|
|
|
/** @returns {Promise<void>} */
|
|
get ready() {
|
|
try {
|
|
webidl.assertBranded(this, WritableStreamDefaultWriterPrototype);
|
|
} catch (err) {
|
|
return PromiseReject(err);
|
|
}
|
|
return this[_readyPromise].promise;
|
|
}
|
|
|
|
/**
|
|
* @param {any} reason
|
|
* @returns {Promise<void>}
|
|
*/
|
|
abort(reason = undefined) {
|
|
try {
|
|
webidl.assertBranded(this, WritableStreamDefaultWriterPrototype);
|
|
} catch (err) {
|
|
return PromiseReject(err);
|
|
}
|
|
if (reason !== undefined) {
|
|
reason = webidl.converters.any(reason);
|
|
}
|
|
if (this[_stream] === undefined) {
|
|
return PromiseReject(
|
|
new TypeError("A writable stream is not associated with the writer."),
|
|
);
|
|
}
|
|
return writableStreamDefaultWriterAbort(this, reason);
|
|
}
|
|
|
|
/** @returns {Promise<void>} */
|
|
close() {
|
|
try {
|
|
webidl.assertBranded(this, WritableStreamDefaultWriterPrototype);
|
|
} catch (err) {
|
|
return PromiseReject(err);
|
|
}
|
|
const stream = this[_stream];
|
|
if (stream === undefined) {
|
|
return PromiseReject(
|
|
new TypeError("A writable stream is not associated with the writer."),
|
|
);
|
|
}
|
|
if (writableStreamCloseQueuedOrInFlight(stream) === true) {
|
|
return PromiseReject(
|
|
new TypeError("The associated stream is already closing."),
|
|
);
|
|
}
|
|
return writableStreamDefaultWriterClose(this);
|
|
}
|
|
|
|
/** @returns {void} */
|
|
releaseLock() {
|
|
webidl.assertBranded(this, WritableStreamDefaultWriterPrototype);
|
|
const stream = this[_stream];
|
|
if (stream === undefined) {
|
|
return;
|
|
}
|
|
assert(stream[_writer] !== undefined);
|
|
writableStreamDefaultWriterRelease(this);
|
|
}
|
|
|
|
/**
|
|
* @param {W} chunk
|
|
* @returns {Promise<void>}
|
|
*/
|
|
write(chunk = undefined) {
|
|
try {
|
|
webidl.assertBranded(this, WritableStreamDefaultWriterPrototype);
|
|
if (chunk !== undefined) {
|
|
chunk = webidl.converters.any(chunk);
|
|
}
|
|
} catch (err) {
|
|
return PromiseReject(err);
|
|
}
|
|
if (this[_stream] === undefined) {
|
|
return PromiseReject(
|
|
new TypeError("A writable stream is not associate with the writer."),
|
|
);
|
|
}
|
|
return writableStreamDefaultWriterWrite(this, chunk);
|
|
}
|
|
|
|
[SymbolFor("Deno.customInspect")](inspect) {
|
|
return inspect(createFilteredInspectProxy({
|
|
object: this,
|
|
evaluate: ObjectPrototypeIsPrototypeOf(
|
|
WritableStreamDefaultWriter.prototype,
|
|
this,
|
|
),
|
|
keys: [
|
|
"closed",
|
|
"desiredSize",
|
|
"ready",
|
|
],
|
|
}));
|
|
}
|
|
}
|
|
|
|
webidl.configurePrototype(WritableStreamDefaultWriter);
|
|
const WritableStreamDefaultWriterPrototype =
|
|
WritableStreamDefaultWriter.prototype;
|
|
|
|
/** @template W */
|
|
class WritableStreamDefaultController {
|
|
/** @type {(reason?: any) => Promise<void>} */
|
|
[_abortAlgorithm];
|
|
/** @type {() => Promise<void>} */
|
|
[_closeAlgorithm];
|
|
/** @type {ValueWithSize<W | _close>[]} */
|
|
[_queue];
|
|
/** @type {number} */
|
|
[_queueTotalSize];
|
|
/** @type {boolean} */
|
|
[_started];
|
|
/** @type {number} */
|
|
[_strategyHWM];
|
|
/** @type {(chunk: W) => number} */
|
|
[_strategySizeAlgorithm];
|
|
/** @type {WritableStream<W>} */
|
|
[_stream];
|
|
/** @type {(chunk: W, controller: this) => Promise<void>} */
|
|
[_writeAlgorithm];
|
|
/** @type {AbortSignal} */
|
|
[_signal];
|
|
|
|
get signal() {
|
|
webidl.assertBranded(this, WritableStreamDefaultControllerPrototype);
|
|
return this[_signal];
|
|
}
|
|
|
|
constructor() {
|
|
webidl.illegalConstructor();
|
|
}
|
|
|
|
/**
|
|
* @param {any=} e
|
|
* @returns {void}
|
|
*/
|
|
error(e = undefined) {
|
|
webidl.assertBranded(this, WritableStreamDefaultControllerPrototype);
|
|
if (e !== undefined) {
|
|
e = webidl.converters.any(e);
|
|
}
|
|
const state = this[_stream][_state];
|
|
if (state !== "writable") {
|
|
return;
|
|
}
|
|
writableStreamDefaultControllerError(this, e);
|
|
}
|
|
|
|
[SymbolFor("Deno.customInspect")](inspect) {
|
|
return inspect(createFilteredInspectProxy({
|
|
object: this,
|
|
evaluate: ObjectPrototypeIsPrototypeOf(
|
|
WritableStreamDefaultController.prototype,
|
|
this,
|
|
),
|
|
keys: [],
|
|
}));
|
|
}
|
|
|
|
/**
|
|
* @param {any=} reason
|
|
* @returns {Promise<void>}
|
|
*/
|
|
[_abortSteps](reason) {
|
|
const result = this[_abortAlgorithm](reason);
|
|
writableStreamDefaultControllerClearAlgorithms(this);
|
|
return result;
|
|
}
|
|
|
|
[_errorSteps]() {
|
|
resetQueue(this);
|
|
}
|
|
}
|
|
|
|
webidl.configurePrototype(WritableStreamDefaultController);
|
|
const WritableStreamDefaultControllerPrototype =
|
|
WritableStreamDefaultController.prototype;
|
|
|
|
/**
|
|
* @param {ReadableStream} stream
|
|
*/
|
|
function createProxy(stream) {
|
|
return stream.pipeThrough(new TransformStream());
|
|
}
|
|
|
|
webidl.converters.ReadableStream = webidl
|
|
.createInterfaceConverter("ReadableStream", ReadableStream.prototype);
|
|
webidl.converters.WritableStream = webidl
|
|
.createInterfaceConverter("WritableStream", WritableStream.prototype);
|
|
|
|
webidl.converters.ReadableStreamType = webidl.createEnumConverter(
|
|
"ReadableStreamType",
|
|
["bytes"],
|
|
);
|
|
|
|
webidl.converters.UnderlyingSource = webidl
|
|
.createDictionaryConverter("UnderlyingSource", [
|
|
{
|
|
key: "start",
|
|
converter: webidl.converters.Function,
|
|
},
|
|
{
|
|
key: "pull",
|
|
converter: webidl.converters.Function,
|
|
},
|
|
{
|
|
key: "cancel",
|
|
converter: webidl.converters.Function,
|
|
},
|
|
{
|
|
key: "type",
|
|
converter: webidl.converters.ReadableStreamType,
|
|
},
|
|
{
|
|
key: "autoAllocateChunkSize",
|
|
converter: (V, prefix, context, opts) =>
|
|
webidl.converters["unsigned long long"](V, prefix, context, {
|
|
...opts,
|
|
enforceRange: true,
|
|
}),
|
|
},
|
|
]);
|
|
webidl.converters.UnderlyingSink = webidl
|
|
.createDictionaryConverter("UnderlyingSink", [
|
|
{
|
|
key: "start",
|
|
converter: webidl.converters.Function,
|
|
},
|
|
{
|
|
key: "write",
|
|
converter: webidl.converters.Function,
|
|
},
|
|
{
|
|
key: "close",
|
|
converter: webidl.converters.Function,
|
|
},
|
|
{
|
|
key: "abort",
|
|
converter: webidl.converters.Function,
|
|
},
|
|
{
|
|
key: "type",
|
|
converter: webidl.converters.any,
|
|
},
|
|
]);
|
|
webidl.converters.Transformer = webidl
|
|
.createDictionaryConverter("Transformer", [
|
|
{
|
|
key: "start",
|
|
converter: webidl.converters.Function,
|
|
},
|
|
{
|
|
key: "transform",
|
|
converter: webidl.converters.Function,
|
|
},
|
|
{
|
|
key: "flush",
|
|
converter: webidl.converters.Function,
|
|
},
|
|
{
|
|
key: "readableType",
|
|
converter: webidl.converters.any,
|
|
},
|
|
{
|
|
key: "writableType",
|
|
converter: webidl.converters.any,
|
|
},
|
|
]);
|
|
webidl.converters.QueuingStrategy = webidl
|
|
.createDictionaryConverter("QueuingStrategy", [
|
|
{
|
|
key: "highWaterMark",
|
|
converter: webidl.converters["unrestricted double"],
|
|
},
|
|
{
|
|
key: "size",
|
|
converter: webidl.converters.Function,
|
|
},
|
|
]);
|
|
webidl.converters.QueuingStrategyInit = webidl
|
|
.createDictionaryConverter("QueuingStrategyInit", [
|
|
{
|
|
key: "highWaterMark",
|
|
converter: webidl.converters["unrestricted double"],
|
|
required: true,
|
|
},
|
|
]);
|
|
|
|
webidl.converters.ReadableStreamIteratorOptions = webidl
|
|
.createDictionaryConverter("ReadableStreamIteratorOptions", [
|
|
{
|
|
key: "preventCancel",
|
|
defaultValue: false,
|
|
converter: webidl.converters.boolean,
|
|
},
|
|
]);
|
|
|
|
webidl.converters.ReadableStreamReaderMode = webidl
|
|
.createEnumConverter("ReadableStreamReaderMode", ["byob"]);
|
|
webidl.converters.ReadableStreamGetReaderOptions = webidl
|
|
.createDictionaryConverter("ReadableStreamGetReaderOptions", [{
|
|
key: "mode",
|
|
converter: webidl.converters.ReadableStreamReaderMode,
|
|
}]);
|
|
|
|
webidl.converters.ReadableWritablePair = webidl
|
|
.createDictionaryConverter("ReadableWritablePair", [
|
|
{
|
|
key: "readable",
|
|
converter: webidl.converters.ReadableStream,
|
|
required: true,
|
|
},
|
|
{
|
|
key: "writable",
|
|
converter: webidl.converters.WritableStream,
|
|
required: true,
|
|
},
|
|
]);
|
|
webidl.converters.StreamPipeOptions = webidl
|
|
.createDictionaryConverter("StreamPipeOptions", [
|
|
{
|
|
key: "preventClose",
|
|
defaultValue: false,
|
|
converter: webidl.converters.boolean,
|
|
},
|
|
{
|
|
key: "preventAbort",
|
|
defaultValue: false,
|
|
converter: webidl.converters.boolean,
|
|
},
|
|
{
|
|
key: "preventCancel",
|
|
defaultValue: false,
|
|
converter: webidl.converters.boolean,
|
|
},
|
|
{ key: "signal", converter: webidl.converters.AbortSignal },
|
|
]);
|
|
|
|
export {
|
|
// Non-Public
|
|
_state,
|
|
// Exposed in global runtime scope
|
|
ByteLengthQueuingStrategy,
|
|
CountQueuingStrategy,
|
|
createProxy,
|
|
Deferred,
|
|
errorReadableStream,
|
|
getReadableStreamResourceBacking,
|
|
getWritableStreamResourceBacking,
|
|
isReadableStreamDisturbed,
|
|
ReadableByteStreamController,
|
|
ReadableStream,
|
|
ReadableStreamBYOBReader,
|
|
ReadableStreamBYOBRequest,
|
|
readableStreamClose,
|
|
readableStreamCollectIntoUint8Array,
|
|
ReadableStreamDefaultController,
|
|
ReadableStreamDefaultReader,
|
|
readableStreamDisturb,
|
|
readableStreamForRid,
|
|
readableStreamForRidUnrefable,
|
|
readableStreamForRidUnrefableRef,
|
|
readableStreamForRidUnrefableUnref,
|
|
ReadableStreamPrototype,
|
|
readableStreamThrowIfErrored,
|
|
TransformStream,
|
|
TransformStreamDefaultController,
|
|
WritableStream,
|
|
writableStreamClose,
|
|
WritableStreamDefaultController,
|
|
WritableStreamDefaultWriter,
|
|
writableStreamForRid,
|
|
};
|