Object.defineProperty(exports, '__esModule', { value: true });
const http = require('http');
const https = require('https');
const zlib = require('zlib');
const Stream = require('stream');
const node_buffer = require('buffer');
const node_util = require('util');
const node_url = require('url');
const node_net = require('net');
const node_fs = require('fs');
const node_path = require('path');
require('os');
const process$1 = require('process');
function _interopDefault (e) { return e && e.__esModule ? e : { default: e }; }
const http__default = /*#__PURE__*/_interopDefault(http);
const https__default = /*#__PURE__*/_interopDefault(https);
const zlib__default = /*#__PURE__*/_interopDefault(zlib);
const Stream__default = /*#__PURE__*/_interopDefault(Stream);
const process__default = /*#__PURE__*/_interopDefault(process$1);
/**
* Returns a `Buffer` instance from the given data URI `uri`.
*
* @param {String} uri Data URI to turn into a Buffer instance
* @returns {Buffer} Buffer instance from Data URI
* @api public
*/
function dataUriToBuffer(uri) {
if (!/^data:/i.test(uri)) {
throw new TypeError('`uri` does not appear to be a Data URI (must begin with "data:")');
}
// strip newlines
uri = uri.replace(/\r?\n/g, '');
// split the URI up into the "metadata" and the "data" portions
const firstComma = uri.indexOf(',');
if (firstComma === -1 || firstComma <= 4) {
throw new TypeError('malformed data: URI');
}
// remove the "data:" scheme and parse the metadata
const meta = uri.substring(5, firstComma).split(';');
let charset = '';
let base64 = false;
const type = meta[0] || 'text/plain';
let typeFull = type;
for (let i = 1; i < meta.length; i++) {
if (meta[i] === 'base64') {
base64 = true;
}
else {
typeFull += `;${meta[i]}`;
if (meta[i].indexOf('charset=') === 0) {
charset = meta[i].substring(8);
}
}
}
// defaults to US-ASCII only if type is not provided
if (!meta[0] && !charset.length) {
typeFull += ';charset=US-ASCII';
charset = 'US-ASCII';
}
// get the encoded data portion and decode URI-encoded chars
const encoding = base64 ? 'base64' : 'ascii';
const data = unescape(uri.substring(firstComma + 1));
const buffer = Buffer.from(data, encoding);
// set `.type` and `.typeFull` properties to MIME type
buffer.type = type;
buffer.typeFull = typeFull;
// set the `.charset` property
buffer.charset = charset;
return buffer;
}
var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
var ponyfill_es2018 = {exports: {}};
/**
* web-streams-polyfill v3.2.1
*/
var hasRequiredPonyfill_es2018;
function requirePonyfill_es2018 () {
if (hasRequiredPonyfill_es2018) return ponyfill_es2018.exports;
hasRequiredPonyfill_es2018 = 1;
(function (module, exports) {
(function (global, factory) {
factory(exports) ;
})(commonjsGlobal, (function (exports) {
/// <reference lib="es2015.symbol" />
const SymbolPolyfill = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ?
Symbol :
description => `Symbol(${description})`;
/// <reference lib="dom" />
function noop() {
return undefined;
}
function getGlobals() {
if (typeof self !== 'undefined') {
return self;
}
else if (typeof window !== 'undefined') {
return window;
}
else if (typeof commonjsGlobal !== 'undefined') {
return commonjsGlobal;
}
return undefined;
}
const globals = getGlobals();
const assert = noop;
function typeIsObject(x) {
return (typeof x === 'object' && x !== null) || typeof x === 'function';
}
const rethrowAssertionErrorRejection = noop;
const originalPromise = Promise;
const originalPromiseThen = Promise.prototype.then;
const originalPromiseResolve = Promise.resolve.bind(originalPromise);
const originalPromiseReject = Promise.reject.bind(originalPromise);
function newPromise(executor) {
return new originalPromise(executor);
}
function promiseResolvedWith(value) {
return originalPromiseResolve(value);
}
function promiseRejectedWith(reason) {
return originalPromiseReject(reason);
}
function PerformPromiseThen(promise, onFulfilled, onRejected) {
// There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an
// approximation.
return originalPromiseThen.call(promise, onFulfilled, onRejected);
}
function uponPromise(promise, onFulfilled, onRejected) {
PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection);
}
function uponFulfillment(promise, onFulfilled) {
uponPromise(promise, onFulfilled);
}
function uponRejection(promise, onRejected) {
uponPromise(promise, undefined, onRejected);
}
function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) {
return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);
}
function setPromiseIsHandledToTrue(promise) {
PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);
}
const queueMicrotask = (() => {
const globalQueueMicrotask = globals && globals.queueMicrotask;
if (typeof globalQueueMicrotask === 'function') {
return globalQueueMicrotask;
}
const resolvedPromise = promiseResolvedWith(undefined);
return (fn) => PerformPromiseThen(resolvedPromise, fn);
})();
function reflectCall(F, V, args) {
if (typeof F !== 'function') {
throw new TypeError('Argument is not a function');
}
return Function.prototype.apply.call(F, V, args);
}
function promiseCall(F, V, args) {
try {
return promiseResolvedWith(reflectCall(F, V, args));
}
catch (value) {
return promiseRejectedWith(value);
}
}
// Original from Chromium
// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js
const QUEUE_MAX_ARRAY_SIZE = 16384;
/**
* Simple queue structure.
*
* Avoids scalability issues with using a packed array directly by using
* multiple arrays in a linked list and keeping the array size bounded.
*/
class SimpleQueue {
constructor() {
this._cursor = 0;
this._size = 0;
// _front and _back are always defined.
this._front = {
_elements: [],
_next: undefined
};
this._back = this._front;
// The cursor is used to avoid calling Array.shift().
// It contains the index of the front element of the array inside the
// front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).
this._cursor = 0;
// When there is only one node, size === elements.length - cursor.
this._size = 0;
}
get length() {
return this._size;
}
// For exception safety, this method is structured in order:
// 1. Read state
// 2. Calculate required state mutations
// 3. Perform state mutations
push(element) {
const oldBack = this._back;
let newBack = oldBack;
assert(oldBack._next === undefined);
if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {
newBack = {
_elements: [],
_next: undefined
};
}
// push() is the mutation most likely to throw an exception, so it
// goes first.
oldBack._elements.push(element);
if (newBack !== oldBack) {
this._back = newBack;
oldBack._next = newBack;
}
++this._size;
}
// Like push(), shift() follows the read -> calculate -> mutate pattern for
// exception safety.
shift() {
assert(this._size > 0); // must not be called on an empty queue
const oldFront = this._front;
let newFront = oldFront;
const oldCursor = this._cursor;
let newCursor = oldCursor + 1;
const elements = oldFront._elements;
const element = elements[oldCursor];
if (newCursor === QUEUE_MAX_ARRAY_SIZE) {
assert(elements.length === QUEUE_MAX_ARRAY_SIZE);
assert(oldFront._next !== undefined);
newFront = oldFront._next;
newCursor = 0;
}
// No mutations before this point.
--this._size;
this._cursor = newCursor;
if (oldFront !== newFront) {
this._front = newFront;
}
// Permit shifted element to be garbage collected.
elements[oldCursor] = undefined;
return element;
}
// The tricky thing about forEach() is that it can be called
// re-entrantly. The queue may be mutated inside the callback. It is easy to
// see that push() within the callback has no negative effects since the end
// of the queue is checked for on every iteration. If shift() is called
// repeatedly within the callback then the next iteration may return an
// element that has been removed. In this case the callback will be called
// with undefined values until we either "catch up" with elements that still
// exist or reach the back of the queue.
forEach(callback) {
let i = this._cursor;
let node = this._front;
let elements = node._elements;
while (i !== elements.length || node._next !== undefined) {
if (i === elements.length) {
assert(node._next !== undefined);
node = node._next;
elements = node._elements;
i = 0;
if (elements.length === 0) {
break;
}
}
callback(elements[i]);
++i;
}
}
// Return the element that would be returned if shift() was called now,
// without modifying the queue.
peek() {
assert(this._size > 0); // must not be called on an empty queue
const front = this._front;
const cursor = this._cursor;
return front._elements[cursor];
}
}
function ReadableStreamReaderGenericInitialize(reader, stream) {
reader._ownerReadableStream = stream;
stream._reader = reader;
if (stream._state === 'readable') {
defaultReaderClosedPromiseInitialize(reader);
}
else if (stream._state === 'closed') {
defaultReaderClosedPromiseInitializeAsResolved(reader);
}
else {
assert(stream._state === 'errored');
defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);
}
}
// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state
// check.
function ReadableStreamReaderGenericCancel(reader, reason) {
const stream = reader._ownerReadableStream;
return ReadableStreamCancel(stream, reason);
}
function ReadableStreamReaderGenericRelease(reader) {
assert(reader._ownerReadableStream !== undefined);
assert(reader._ownerReadableStream._reader === reader);
if (reader._ownerReadableStream._state === 'readable') {
defaultReaderClosedPromiseReject(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));
}
else {
defaultReaderClosedPromiseResetToRejected(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));
}
reader._ownerReadableStream._reader = undefined;
reader._ownerReadableStream = undefined;
}
// Helper functions for the readers.
function readerLockException(name) {
return new TypeError('Cannot ' + name + ' a stream using a released reader');
}
// Helper functions for the ReadableStreamDefaultReader.
function defaultReaderClosedPromiseInitialize(reader) {
reader._closedPromise = newPromise((resolve, reject) => {
reader._closedPromise_resolve = resolve;
reader._closedPromise_reject = reject;
});
}
function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) {
defaultReaderClosedPromiseInitialize(reader);
defaultReaderClosedPromiseReject(reader, reason);
}
function defaultReaderClosedPromiseInitializeAsResolved(reader) {
defaultReaderClosedPromiseInitialize(reader);
defaultReaderClosedPromiseResolve(reader);
}
function defaultReaderClosedPromiseReject(reader, reason) {
if (reader._closedPromise_reject === undefined) {
return;
}
setPromiseIsHandledToTrue(reader._closedPromise);
reader._closedPromise_reject(reason);
reader._closedPromise_resolve = undefined;
reader._closedPromise_reject = undefined;
}
function defaultReaderClosedPromiseResetToRejected(reader, reason) {
assert(reader._closedPromise_resolve === undefined);
assert(reader._closedPromise_reject === undefined);
defaultReaderClosedPromiseInitializeAsRejected(reader, reason);
}
function defaultReaderClosedPromiseResolve(reader) {
if (reader._closedPromise_resolve === undefined) {
return;
}
reader._closedPromise_resolve(undefined);
reader._closedPromise_resolve = undefined;
reader._closedPromise_reject = undefined;
}
const AbortSteps = SymbolPolyfill('[[AbortSteps]]');
const ErrorSteps = SymbolPolyfill('[[ErrorSteps]]');
const CancelSteps = SymbolPolyfill('[[CancelSteps]]');
const PullSteps = SymbolPolyfill('[[PullSteps]]');
/// <reference lib="es2015.core" />
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill
const NumberIsFinite = Number.isFinite || function (x) {
return typeof x === 'number' && isFinite(x);
};
/// <reference lib="es2015.core" />
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill
const MathTrunc = Math.trunc || function (v) {
return v < 0 ? Math.ceil(v) : Math.floor(v);
};
// https://heycam.github.io/webidl/#idl-dictionaries
function isDictionary(x) {
return typeof x === 'object' || typeof x === 'function';
}
function assertDictionary(obj, context) {
if (obj !== undefined && !isDictionary(obj)) {
throw new TypeError(`${context} is not an object.`);
}
}
// https://heycam.github.io/webidl/#idl-callback-functions
function assertFunction(x, context) {
if (typeof x !== 'function') {
throw new TypeError(`${context} is not a function.`);
}
}
// https://heycam.github.io/webidl/#idl-object
function isObject(x) {
return (typeof x === 'object' && x !== null) || typeof x === 'function';
}
function assertObject(x, context) {
if (!isObject(x)) {
throw new TypeError(`${context} is not an object.`);
}
}
function assertRequiredArgument(x, position, context) {
if (x === undefined) {
throw new TypeError(`Parameter ${position} is required in '${context}'.`);
}
}
function assertRequiredField(x, field, context) {
if (x === undefined) {
throw new TypeError(`${field} is required in '${context}'.`);
}
}
// https://heycam.github.io/webidl/#idl-unrestricted-double
function convertUnrestrictedDouble(value) {
return Number(value);
}
function censorNegativeZero(x) {
return x === 0 ? 0 : x;
}
function integerPart(x) {
return censorNegativeZero(MathTrunc(x));
}
// https://heycam.github.io/webidl/#idl-unsigned-long-long
function convertUnsignedLongLongWithEnforceRange(value, context) {
const lowerBound = 0;
const upperBound = Number.MAX_SAFE_INTEGER;
let x = Number(value);
x = censorNegativeZero(x);
if (!NumberIsFinite(x)) {
throw new TypeError(`${context} is not a finite number`);
}
x = integerPart(x);
if (x < lowerBound || x > upperBound) {
throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);
}
if (!NumberIsFinite(x) || x === 0) {
return 0;
}
// TODO Use BigInt if supported?
// let xBigInt = BigInt(integerPart(x));
// xBigInt = BigInt.asUintN(64, xBigInt);
// return Number(xBigInt);
return x;
}
function assertReadableStream(x, context) {
if (!IsReadableStream(x)) {
throw new TypeError(`${context} is not a ReadableStream.`);
}
}
// Abstract operations for the ReadableStream.
function AcquireReadableStreamDefaultReader(stream) {
return new ReadableStreamDefaultReader(stream);
}
// ReadableStream API exposed for controllers.
function ReadableStreamAddReadRequest(stream, readRequest) {
assert(IsReadableStreamDefaultReader(stream._reader));
assert(stream._state === 'readable');
stream._reader._readRequests.push(readRequest);
}
function ReadableStreamFulfillReadRequest(stream, chunk, done) {
const reader = stream._reader;
assert(reader._readRequests.length > 0);
const readRequest = reader._readRequests.shift();
if (done) {
readRequest._closeSteps();
}
else {
readRequest._chunkSteps(chunk);
}
}
function ReadableStreamGetNumReadRequests(stream) {
return stream._reader._readRequests.length;
}
function ReadableStreamHasDefaultReader(stream) {
const reader = stream._reader;
if (reader === undefined) {
return false;
}
if (!IsReadableStreamDefaultReader(reader)) {
return false;
}
return true;
}
/**
* A default reader vended by a {@link ReadableStream}.
*
* @public
*/
class ReadableStreamDefaultReader {
constructor(stream) {
assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');
assertReadableStream(stream, 'First parameter');
if (IsReadableStreamLocked(stream)) {
throw new TypeError('This stream has already been locked for exclusive reading by another reader');
}
ReadableStreamReaderGenericInitialize(this, stream);
this._readRequests = new SimpleQueue();
}
/**
* Returns a promise that will be fulfilled when the stream becomes closed,
* or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.
*/
get closed() {
if (!IsReadableStreamDefaultReader(this)) {
return promiseRejectedWith(defaultReaderBrandCheckException('closed'));
}
return this._closedPromise;
}
/**
* If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.
*/
cancel(reason = undefined) {
if (!IsReadableStreamDefaultReader(this)) {
return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));
}
if (this._ownerReadableStream === undefined) {
return promiseRejectedWith(readerLockException('cancel'));
}
return ReadableStreamReaderGenericCancel(this, reason);
}
/**
* Returns a promise that allows access to the next chunk from the stream's internal queue, if available.
*
* If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.
*/
read() {
if (!IsReadableStreamDefaultReader(this)) {
return promiseRejectedWith(defaultReaderBrandCheckException('read'));
}
if (this._ownerReadableStream === undefined) {
return promiseRejectedWith(readerLockException('read from'));
}
let resolvePromise;
let rejectPromise;
const promise = newPromise((resolve, reject) => {
resolvePromise = resolve;
rejectPromise = reject;
});
const readRequest = {
_chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),
_closeSteps: () => resolvePromise({ value: undefined, done: true }),
_errorSteps: e => rejectPromise(e)
};
ReadableStreamDefaultReaderRead(this, readRequest);
return promise;
}
/**
* Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.
* If the associated stream is errored when the lock is released, the reader will appear errored in the same way
* from now on; otherwise, the reader will appear closed.
*
* A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by
* the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to
* do so will throw a `TypeError` and leave the reader locked to the stream.
*/
releaseLock() {
if (!IsReadableStreamDefaultReader(this)) {
throw defaultReaderBrandCheckException('releaseLock');
}
if (this._ownerReadableStream === undefined) {
return;
}
if (this._readRequests.length > 0) {
throw new TypeError('Tried to release a reader lock when that reader has pending read() calls un-settled');
}
ReadableStreamReaderGenericRelease(this);
}
}
Object.defineProperties(ReadableStreamDefaultReader.prototype, {
cancel: { enumerable: true },
read: { enumerable: true },
releaseLock: { enumerable: true },
closed: { enumerable: true }
});
if (typeof SymbolPolyfill.toStringTag === 'symbol') {
Object.defineProperty(ReadableStreamDefaultReader.prototype, SymbolPolyfill.toStringTag, {
value: 'ReadableStreamDefaultReader',
configurable: true
});
}
// Abstract operations for the readers.
function IsReadableStreamDefaultReader(x) {
if (!typeIsObject(x)) {
return false;
}
if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {
return false;
}
return x instanceof ReadableStreamDefaultReader;
}
function ReadableStreamDefaultReaderRead(reader, readRequest) {
const stream = reader._ownerReadableStream;
stream._disturbed = true;
if (stream._state === 'closed') {
readRequest._closeSteps();
}
else if (stream._state === 'errored') {
readRequest._errorSteps(stream._storedError);
}
else {
assert(stream._state === 'readable');
stream._readableStreamController[PullSteps](readRequest);
}
}
// Helper functions for the ReadableStreamDefaultReader.
function defaultReaderBrandCheckException(name) {
return new TypeError(`ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);
}
/// <reference lib="es2018.asynciterable" />
/* eslint-disable @typescript-eslint/no-empty-function */
const AsyncIteratorPrototype = Object.getPrototypeOf(Object.getPrototypeOf(async function* () { }).prototype);
/// <reference lib="es2018.asynciterable" />
class ReadableStreamAsyncIteratorImpl {
constructor(reader, preventCancel) {
this._ongoingPromise = undefined;
this._isFinished = false;
this._reader = reader;
this._preventCancel = preventCancel;
}
next() {
const nextSteps = () => this._nextSteps();
this._ongoingPromise = this._ongoingPromise ?
transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :
nextSteps();
return this._ongoingPromise;
}
return(value) {
const returnSteps = () => this._returnSteps(value);
return this._ongoingPromise ?
transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :
returnSteps();
}
_nextSteps() {
if (this._isFinished) {
return Promise.resolve({ value: undefined, done: true });
}
const reader = this._reader;
if (reader._ownerReadableStream === undefined) {
return promiseRejectedWith(readerLockException('iterate'));
}
let resolvePromise;
let rejectPromise;
const promise = newPromise((resolve, reject) => {
resolvePromise = resolve;
rejectPromise = reject;
});
const readRequest = {
_chunkSteps: chunk => {
this._ongoingPromise = undefined;
// This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.
// FIXME Is this a bug in the specification, or in the test?
queueMicrotask(() => resolvePromise({ value: chunk, done: false }));
},
_closeSteps: () => {
this._ongoingPromise = undefined;
this._isFinished = true;
ReadableStreamReaderGenericRelease(reader);
resolvePromise({ value: undefined, done: true });
},
_errorSteps: reason => {
this._ongoingPromise = undefined;
this._isFinished = true;
ReadableStreamReaderGenericRelease(reader);
rejectPromise(reason);
}
};
ReadableStreamDefaultReaderRead(reader, readRequest);
return promise;
}
_returnSteps(value) {
if (this._isFinished) {
return Promise.resolve({ value, done: true });
}
this._isFinished = true;
const reader = this._reader;
if (reader._ownerReadableStream === undefined) {
return promiseRejectedWith(readerLockException('finish iterating'));
}
assert(reader._readRequests.length === 0);
if (!this._preventCancel) {
const result = ReadableStreamReaderGenericCancel(reader, value);
ReadableStreamReaderGenericRelease(reader);
return transformPromiseWith(result, () => ({ value, done: true }));
}
ReadableStreamReaderGenericRelease(reader);
return promiseResolvedWith({ value, done: true });
}
}
const ReadableStreamAsyncIteratorPrototype = {
next() {
if (!IsReadableStreamAsyncIterator(this)) {
return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));
}
return this._asyncIteratorImpl.next();
},
return(value) {
if (!IsReadableStreamAsyncIterator(this)) {
return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));
}
return this._asyncIteratorImpl.return(value);
}
};
if (AsyncIteratorPrototype !== undefined) {
Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);
}
// Abstract operations for the ReadableStream.
function AcquireReadableStreamAsyncIterator(stream, preventCancel) {
const reader = AcquireReadableStreamDefaultReader(stream);
const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);
const iterator = Object.create(ReadableStreamAsyncIteratorPrototype);
iterator._asyncIteratorImpl = impl;
return iterator;
}
function IsReadableStreamAsyncIterator(x) {
if (!typeIsObject(x)) {
return false;
}
if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {
return false;
}
try {
// noinspection SuspiciousTypeOfGuard
return x._asyncIteratorImpl instanceof
ReadableStreamAsyncIteratorImpl;
}
catch (_a) {
return false;
}
}
// Helper functions for the ReadableStream.
function streamAsyncIteratorBrandCheckException(name) {
return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);
}
/// <reference lib="es2015.core" />
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill
const NumberIsNaN = Number.isNaN || function (x) {
// eslint-disable-next-line no-self-compare
return x !== x;
};
function CreateArrayFromList(elements) {
// We use arrays to represent lists, so this is basically a no-op.
// Do a slice though just in case we happen to depend on the unique-ness.
return elements.slice();
}
function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) {
new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);
}
// Not implemented correctly
function TransferArrayBuffer(O) {
return O;
}
// Not implemented correctly
// eslint-disable-next-line @typescript-eslint/no-unused-vars
function CanTransferArrayBuffer(O) {
return true;
}
// Not implemented correctly
// eslint-disable-next-line @typescript-eslint/no-unused-vars
function IsDetachedBuffer(O) {
return false;
}
function ArrayBufferSlice(buffer, begin, end) {
// ArrayBuffer.prototype.slice is not available on IE10
// https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice
if (buffer.slice) {
return buffer.slice(begin, end);
}
const length = end - begin;
const slice = new ArrayBuffer(length);
CopyDataBlockBytes(slice, 0, buffer, begin, length);
return slice;
}
function IsNonNegativeNumber(v) {
if (typeof v !== 'number') {
return false;
}
if (NumberIsNaN(v)) {
return false;
}
if (v < 0) {
return false;
}
return true;
}
function CloneAsUint8Array(O) {
const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);
return new Uint8Array(buffer);
}
function DequeueValue(container) {
assert(container._queue.length > 0);
const pair = container._queue.shift();
container._queueTotalSize -= pair.size;
if (container._queueTotalSize < 0) {
container._queueTotalSize = 0;
}
return pair.value;
}
function EnqueueValueWithSize(container, value, size) {
if (!IsNonNegativeNumber(size) || size === Infinity) {
throw new RangeError('Size must be a finite, non-NaN, non-negative number.');
}
container._queue.push({ value, size });
container._queueTotalSize += size;
}
function PeekQueueValue(container) {
assert(container._queue.length > 0);
const pair = container._queue.peek();
return pair.value;
}
function ResetQueue(container) {
container._queue = new SimpleQueue();
container._queueTotalSize = 0;
}
/**
* A pull-into request in a {@link ReadableByteStreamController}.
*
* @public
*/
class ReadableStreamBYOBRequest {
constructor() {
throw new TypeError('Illegal constructor');
}
/**
* Returns the view for writing in to, or `null` if the BYOB request has already been responded to.
*/
get view() {
if (!IsReadableStreamBYOBRequest(this)) {
throw byobRequestBrandCheckException('view');
}
return this._view;
}
respond(bytesWritten) {
if (!IsReadableStreamBYOBRequest(this)) {
throw byobRequestBrandCheckException('respond');
}
assertRequiredArgument(bytesWritten, 1, 'respond');
bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');
if (this._associatedReadableByteStreamController === undefined) {
throw new TypeError('This BYOB request has been invalidated');
}
if (IsDetachedBuffer(this._view.buffer)) ;
assert(this._view.byteLength > 0);
assert(this._view.buffer.byteLength > 0);
ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);
}
respondWithNewView(view) {
if (!IsReadableStreamBYOBRequest(this)) {
throw byobRequestBrandCheckException('respondWithNewView');
}
assertRequiredArgument(view, 1, 'respondWithNewView');
if (!ArrayBuffer.isView(view)) {
throw new TypeError('You can only respond with array buffer views');
}
if (this._associatedReadableByteStreamController === undefined) {
throw new TypeError('This BYOB request has been invalidated');
}
if (IsDetachedBuffer(view.buffer)) ;
ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);
}
}
Object.defineProperties(ReadableStreamBYOBRequest.prototype, {
respond: { enumerable: true },
respondWithNewView: { enumerable: true },
view: { enumerable: true }
});
if (typeof SymbolPolyfill.toStringTag === 'symbol') {
Object.defineProperty(ReadableStreamBYOBRequest.prototype, SymbolPolyfill.toStringTag, {
value: 'ReadableStreamBYOBRequest',
configurable: true
});
}
/**
* Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.
*
* @public
*/
class ReadableByteStreamController {
constructor() {
throw new TypeError('Illegal constructor');
}
/**
* Returns the current BYOB pull request, or `null` if there isn't one.
*/
get byobRequest() {
if (!IsReadableByteStreamController(this)) {
throw byteStreamControllerBrandCheckException('byobRequest');
}
return ReadableByteStreamControllerGetBYOBRequest(this);
}
/**
* Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is
* over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.
*/
get desiredSize() {
if (!IsReadableByteStreamController(this)) {
throw byteStreamControllerBrandCheckException('desiredSize');
}
return ReadableByteStreamControllerGetDesiredSize(this);
}
/**
* Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from
* the stream, but once those are read, the stream will become closed.
*/
close() {
if (!IsReadableByteStreamController(this)) {
throw byteStreamControllerBrandCheckException('close');
}
if (this._closeRequested) {
throw new TypeError('The stream has already been closed; do not close it again!');
}
const state = this._controlledReadableByteStream._state;
if (state !== 'readable') {
throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);
}
ReadableByteStreamControllerClose(this);
}
enqueue(chunk) {
if (!IsReadableByteStreamController(this)) {
throw byteStreamControllerBrandCheckException('enqueue');
}
assertRequiredArgument(chunk, 1, 'enqueue');
if (!ArrayBuffer.isView(chunk)) {
throw new TypeError('chunk must be an array buffer view');
}
if (chunk.byteLength === 0) {
throw new TypeError('chunk must have non-zero byteLength');
}
if (chunk.buffer.byteLength === 0) {
throw new TypeError(`chunk's buffer must have non-zero byteLength`);
}
if (this._closeRequested) {
throw new TypeError('stream is closed or draining');
}
const state = this._controlledReadableByteStream._state;
if (state !== 'readable') {
throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);
}
ReadableByteStreamControllerEnqueue(this, chunk);
}
/**
* Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.
*/
error(e = undefined) {
if (!IsReadableByteStreamController(this)) {
throw byteStreamControllerBrandCheckException('error');
}
ReadableByteStreamControllerError(this, e);
}
/** @internal */
[CancelSteps](reason) {
ReadableByteStreamControllerClearPendingPullIntos(this);
ResetQueue(this);
const result = this._cancelAlgorithm(reason);
ReadableByteStreamControllerClearAlgorithms(this);
return result;
}
/** @internal */
[PullSteps](readRequest) {
const stream = this._controlledReadableByteStream;
assert(ReadableStreamHasDefaultReader(stream));
if (this._queueTotalSize > 0) {
assert(ReadableStreamGetNumReadRequests(stream) === 0);
const entry = this._queue.shift();
this._queueTotalSize -= entry.byteLength;
ReadableByteStreamControllerHandleQueueDrain(this);
const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);
readRequest._chunkSteps(view);
return;
}
const autoAllocateChunkSize = this._autoAllocateChunkSize;
if (autoAllocateChunkSize !== undefined) {
let buffer;
try {
buffer = new ArrayBuffer(autoAllocateChunkSize);
}
catch (bufferE) {
readRequest._errorSteps(bufferE);
return;
}
const pullIntoDescriptor = {
buffer,
bufferByteLength: autoAllocateChunkSize,
byteOffset: 0,
byteLength: autoAllocateChunkSize,
bytesFilled: 0,
elementSize: 1,
viewConstructor: Uint8Array,
readerType: 'default'
};
this._pendingPullIntos.push(pullIntoDescriptor);
}
ReadableStreamAddReadRequest(stream, readRequest);
ReadableByteStreamControllerCallPullIfNeeded(this);
}
}
Object.defineProperties(ReadableByteStreamController.prototype, {
close: { enumerable: true },
enqueue: { enumerable: true },
error: { enumerable: true },
byobRequest: { enumerable: true },
desiredSize: { enumerable: true }
});
if (typeof SymbolPolyfill.toStringTag === 'symbol') {
Object.defineProperty(ReadableByteStreamController.prototype, SymbolPolyfill.toStringTag, {
value: 'ReadableByteStreamController',
configurable: true
});
}
// Abstract operations for the ReadableByteStreamController.
function IsReadableByteStreamController(x) {
if (!typeIsObject(x)) {
return false;
}
if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {
return false;
}
return x instanceof ReadableByteStreamController;
}
function IsReadableStreamBYOBRequest(x) {
if (!typeIsObject(x)) {
return false;
}
if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {
return false;
}
return x instanceof ReadableStreamBYOBRequest;
}
function ReadableByteStreamControllerCallPullIfNeeded(controller) {
const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);
if (!shouldPull) {
return;
}
if (controller._pulling) {
controller._pullAgain = true;
return;
}
assert(!controller._pullAgain);
controller._pulling = true;
// TODO: Test controller argument
const pullPromise = controller._pullAlgorithm();
uponPromise(pullPromise, () => {
controller._pulling = false;
if (controller._pullAgain) {
controller._pullAgain = false;
ReadableByteStreamControllerCallPullIfNeeded(controller);
}
}, e => {
ReadableByteStreamControllerError(controller, e);
});
}
function ReadableByteStreamControllerClearPendingPullIntos(controller) {
ReadableByteStreamControllerInvalidateBYOBRequest(controller);
controller._pendingPullIntos = new SimpleQueue();
}
function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) {
assert(stream._state !== 'errored');
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);
}
}
function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) {
const bytesFilled = pullIntoDescriptor.bytesFilled;
const elementSize = pullIntoDescriptor.elementSize;
assert(bytesFilled <= pullIntoDescriptor.byteLength);
return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize);
}
function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) {
controller._queue.push({ buffer, byteOffset, byteLength });
controller._queueTotalSize += byteLength;
}
function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) {
const elementSize = pullIntoDescriptor.elementSize;
const currentAlignedBytes = pullIntoDescriptor.bytesFilled - pullIntoDescriptor.bytesFilled % elementSize;
const maxBytesToCopy = Math.min(controller._queueTotalSize, 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.peek();
const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);
const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;
CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);
if (headOfQueue.byteLength === bytesToCopy) {
queue.shift();
}
else {
headOfQueue.byteOffset += bytesToCopy;
headOfQueue.byteLength -= bytesToCopy;
}
controller._queueTotalSize -= bytesToCopy;
ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);
totalBytesToCopyRemaining -= bytesToCopy;
}
if (!ready) {
assert(controller._queueTotalSize === 0);
assert(pullIntoDescriptor.bytesFilled > 0);
assert(pullIntoDescriptor.bytesFilled < pullIntoDescriptor.elementSize);
}
return ready;
}
function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) {
assert(controller._pendingPullIntos.length === 0 || controller._pendingPullIntos.peek() === pullIntoDescriptor);
assert(controller._byobRequest === null);
pullIntoDescriptor.bytesFilled += size;
}
function ReadableByteStreamControllerHandleQueueDrain(controller) {
assert(controller._controlledReadableByteStream._state === 'readable');
if (controller._queueTotalSize === 0 && controller._closeRequested) {
ReadableByteStreamControllerClearAlgorithms(controller);
ReadableStreamClose(controller._controlledReadableByteStream);
}
else {
ReadableByteStreamControllerCallPullIfNeeded(controller);
}
}
function ReadableByteStreamControllerInvalidateBYOBRequest(controller) {
if (controller._byobRequest === null) {
return;
}
controller._byobRequest._associatedReadableByteStreamController = undefined;
controller._byobRequest._view = null;
controller._byobRequest = null;
}
function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) {
assert(!controller._closeRequested);
while (controller._pendingPullIntos.length > 0) {
if (controller._queueTotalSize === 0) {
return;
}
const pullIntoDescriptor = controller._pendingPullIntos.peek();
if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {
ReadableByteStreamControllerShiftPendingPullInto(controller);
ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);
}
}
}
function ReadableByteStreamControllerPullInto(controller, view, readIntoRequest) {
const stream = controller._controlledReadableByteStream;
let elementSize = 1;
if (view.constructor !== DataView) {
elementSize = view.constructor.BYTES_PER_ELEMENT;
}
const ctor = view.constructor;
// try {
const buffer = TransferArrayBuffer(view.buffer);
// } catch (e) {
// readIntoRequest._errorSteps(e);
// return;
// }
const pullIntoDescriptor = {
buffer,
bufferByteLength: buffer.byteLength,
byteOffset: view.byteOffset,
byteLength: view.byteLength,
bytesFilled: 0,
elementSize,
viewConstructor: ctor,
readerType: 'byob'
};
if (controller._pendingPullIntos.length > 0) {
controller._pendingPullIntos.push(pullIntoDescriptor);
// No ReadableByteStreamControllerCallPullIfNeeded() call since:
// - No change happens on desiredSize
// - The source has already been notified of that there's at least 1 pending read(view)
ReadableStreamAddReadIntoRequest(stream, readIntoRequest);
return;
}
if (stream._state === 'closed') {
const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);
readIntoRequest._closeSteps(emptyView);
return;
}
if (controller._queueTotalSize > 0) {
if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {
const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);
ReadableByteStreamControllerHandleQueueDrain(controller);
readIntoRequest._chunkSteps(filledView);
return;
}
if (controller._closeRequested) {
const e = new TypeError('Insufficient bytes to fill elements in the given buffer');
ReadableByteStreamControllerError(controller, e);
readIntoRequest._errorSteps(e);
return;
}
}
controller._pendingPullIntos.push(pullIntoDescriptor);
ReadableStreamAddReadIntoRequest(stream, readIntoRequest);
ReadableByteStreamControllerCallPullIfNeeded(controller);
}
function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) {
assert(firstDescriptor.bytesFilled === 0);
const stream = controller._controlledReadableByteStream;
if (ReadableStreamHasBYOBReader(stream)) {
while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {
const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);
ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);
}
}
}
function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) {
assert(pullIntoDescriptor.bytesFilled + bytesWritten <= pullIntoDescriptor.byteLength);
ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);
if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.elementSize) {
return;
}
ReadableByteStreamControllerShiftPendingPullInto(controller);
const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;
if (remainderSize > 0) {
const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;
const remainder = ArrayBufferSlice(pullIntoDescriptor.buffer, end - remainderSize, end);
ReadableByteStreamControllerEnqueueChunkToQueue(controller, remainder, 0, remainder.byteLength);
}
pullIntoDescriptor.bytesFilled -= remainderSize;
ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);
ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);
}
function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) {
const firstDescriptor = controller._pendingPullIntos.peek();
assert(CanTransferArrayBuffer(firstDescriptor.buffer));
ReadableByteStreamControllerInvalidateBYOBRequest(controller);
const state = controller._controlledReadableByteStream._state;
if (state === 'closed') {
ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);
}
else {
ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);
}
ReadableByteStreamControllerCallPullIfNeeded(controller);
}
function ReadableByteStreamControllerShiftPendingPullInto(controller) {
assert(controller._byobRequest === null);
const descriptor = controller._pendingPullIntos.shift();
return descriptor;
}
function ReadableByteStreamControllerShouldCallPull(controller) {
const stream = controller._controlledReadableByteStream;
if (stream._state !== 'readable') {
return false;
}
if (controller._closeRequested) {
return false;
}
if (!controller._started) {
return false;
}
if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {
return true;
}
if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {
return true;
}
const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);
if (desiredSize > 0) {
return true;
}
return false;
}
function ReadableByteStreamControllerClearAlgorithms(controller) {
controller._pullAlgorithm = undefined;
controller._cancelAlgorithm = undefined;
}
// A client of ReadableByteStreamController may use these functions directly to bypass state check.
function ReadableByteStreamControllerClose(controller) {
const stream = controller._controlledReadableByteStream;
if (controller._closeRequested || stream._state !== 'readable') {
return;
}
if (controller._queueTotalSize > 0) {
controller._closeRequested = true;
return;
}
if (controller._pendingPullIntos.length > 0) {
const firstPendingPullInto = controller._pendingPullIntos.peek();
if (firstPendingPullInto.bytesFilled > 0) {
const e = new TypeError('Insufficient bytes to fill elements in the given buffer');
ReadableByteStreamControllerError(controller, e);
throw e;
}
}
ReadableByteStreamControllerClearAlgorithms(controller);
ReadableStreamClose(stream);
}
function ReadableByteStreamControllerEnqueue(controller, chunk) {
const stream = controller._controlledReadableByteStream;
if (controller._closeRequested || stream._state !== 'readable') {
return;
}
const buffer = chunk.buffer;
const byteOffset = chunk.byteOffset;
const byteLength = chunk.byteLength;
const transferredBuffer = TransferArrayBuffer(buffer);
if (controller._pendingPullIntos.length > 0) {
const firstPendingPullInto = controller._pendingPullIntos.peek();
if (IsDetachedBuffer(firstPendingPullInto.buffer)) ;
firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);
}
ReadableByteStreamControllerInvalidateBYOBRequest(controller);
if (ReadableStreamHasDefaultReader(stream)) {
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.peek().readerType === 'default');
ReadableByteStreamControllerShiftPendingPullInto(controller);
}
const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);
ReadableStreamFulfillReadRequest(stream, transferredView, false);
}
}
else if (ReadableStreamHasBYOBReader(stream)) {
// TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.
ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);
ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);
}
else {
assert(!IsReadableStreamLocked(stream));
ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);
}
ReadableByteStreamControllerCallPullIfNeeded(controller);
}
function ReadableByteStreamControllerError(controller, e) {
const stream = controller._controlledReadableByteStream;
if (stream._state !== 'readable') {
return;
}
ReadableByteStreamControllerClearPendingPullIntos(controller);
ResetQueue(controller);
ReadableByteStreamControllerClearAlgorithms(controller);
ReadableStreamError(stream, e);
}
function ReadableByteStreamControllerGetBYOBRequest(controller) {
if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {
const firstDescriptor = controller._pendingPullIntos.peek();
const view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled);
const byobRequest = Object.create(ReadableStreamBYOBRequest.prototype);
SetUpReadableStreamBYOBRequest(byobRequest, controller, view);
controller._byobRequest = byobRequest;
}
return controller._byobRequest;
}
function ReadableByteStreamControllerGetDesiredSize(controller) {
const state = controller._controlledReadableByteStream._state;
if (state === 'errored') {
return null;
}
if (state === 'closed') {
return 0;
}
return controller._strategyHWM - controller._queueTotalSize;
}
function ReadableByteStreamControllerRespond(controller, bytesWritten) {
assert(controller._pendingPullIntos.length > 0);
const firstDescriptor = controller._pendingPullIntos.peek();
const state = controller._controlledReadableByteStream._state;
if (state === 'closed') {
if (bytesWritten !== 0) {
throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');
}
}
else {
if (bytesWritten === 0) {
throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');
}
if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {
throw new RangeError('bytesWritten out of range');
}
}
firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);
ReadableByteStreamControllerRespondInternal(controller, bytesWritten);
}
function ReadableByteStreamControllerRespondWithNewView(controller, view) {
assert(controller._pendingPullIntos.length > 0);
assert(!IsDetachedBuffer(view.buffer));
const firstDescriptor = controller._pendingPullIntos.peek();
const state = controller._controlledReadableByteStream._state;
if (state === 'closed') {
if (view.byteLength !== 0) {
throw new TypeError('The view\'s length must be 0 when calling respondWithNewView() on a closed stream');
}
}
else {
if (view.byteLength === 0) {
throw new TypeError('The view\'s length must be greater than 0 when calling respondWithNewView() on a readable stream');
}
}
if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {
throw new RangeError('The region specified by view does not match byobRequest');
}
if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {
throw new RangeError('The buffer of view has different capacity than byobRequest');
}
if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {
throw new RangeError('The region specified by view is larger than byobRequest');
}
const viewByteLength = view.byteLength;
firstDescriptor.buffer = TransferArrayBuffer(view.buffer);
ReadableByteStreamControllerRespondInternal(controller, viewByteLength);
}
function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) {
assert(stream._readableStreamController === undefined);
controller._controlledReadableByteStream = stream;
controller._pullAgain = false;
controller._pulling = false;
controller._byobRequest = null;
// Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.
controller._queue = controller._queueTotalSize = undefined;
ResetQueue(controller);
controller._closeRequested = false;
controller._started = false;
controller._strategyHWM = highWaterMark;
controller._pullAlgorithm = pullAlgorithm;
controller._cancelAlgorithm = cancelAlgorithm;
controller._autoAllocateChunkSize = autoAllocateChunkSize;
controller._pendingPullIntos = new SimpleQueue();
stream._readableStreamController = controller;
const startResult = startAlgorithm();
uponPromise(promiseResolvedWith(startResult), () => {
controller._started = true;
assert(!controller._pulling);
assert(!controller._pullAgain);
ReadableByteStreamControllerCallPullIfNeeded(controller);
}, r => {
ReadableByteStreamControllerError(controller, r);
});
}
function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) {
const controller = Object.create(ReadableByteStreamController.prototype);
let startAlgorithm = () => undefined;
let pullAlgorithm = () => promiseResolvedWith(undefined);
let cancelAlgorithm = () => promiseResolvedWith(undefined);
if (underlyingByteSource.start !== undefined) {
startAlgorithm = () => underlyingByteSource.start(controller);
}
if (underlyingByteSource.pull !== undefined) {
pullAlgorithm = () => underlyingByteSource.pull(controller);
}
if (underlyingByteSource.cancel !== undefined) {
cancelAlgorithm = reason => underlyingByteSource.cancel(reason);
}
const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;
if (autoAllocateChunkSize === 0) {
throw new TypeError('autoAllocateChunkSize must be greater than 0');
}
SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize);
}
function SetUpReadableStreamBYOBRequest(request, controller, view) {
assert(IsReadableByteStreamController(controller));
assert(!IsDetachedBuffer(view.buffer));
request._associatedReadableByteStreamController = controller;
request._view = view;
}
// Helper functions for the ReadableStreamBYOBRequest.
function byobRequestBrandCheckException(name) {
return new TypeError(`ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);
}
// Helper functions for the ReadableByteStreamController.
function byteStreamControllerBrandCheckException(name) {
return new TypeError(`ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);
}
// Abstract operations for the ReadableStream.
function AcquireReadableStreamBYOBReader(stream) {
return new ReadableStreamBYOBReader(stream);
}
// ReadableStream API exposed for controllers.
function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) {
assert(IsReadableStreamBYOBReader(stream._reader));
assert(stream._state === 'readable' || stream._state === 'closed');
stream._reader._readIntoRequests.push(readIntoRequest);
}
function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) {
const reader = stream._reader;
assert(reader._readIntoRequests.length > 0);
const readIntoRequest = reader._readIntoRequests.shift();
if (done) {
readIntoRequest._closeSteps(chunk);
}
else {
readIntoRequest._chunkSteps(chunk);
}
}
function ReadableStreamGetNumReadIntoRequests(stream) {
return stream._reader._readIntoRequests.length;
}
function ReadableStreamHasBYOBReader(stream) {
const reader = stream._reader;
if (reader === undefined) {
return false;
}
if (!IsReadableStreamBYOBReader(reader)) {
return false;
}
return true;
}
/**
* A BYOB reader vended by a {@link ReadableStream}.
*
* @public
*/
class ReadableStreamBYOBReader {
constructor(stream) {
assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');
assertReadableStream(stream, 'First parameter');
if (IsReadableStreamLocked(stream)) {
throw new TypeError('This stream has already been locked for exclusive reading by another reader');
}
if (!IsReadableByteStreamController(stream._readableStreamController)) {
throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +
'source');
}
ReadableStreamReaderGenericInitialize(this, stream);
this._readIntoRequests = new SimpleQueue();
}
/**
* Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or
* the reader's lock is released before the stream finishes closing.
*/
get closed() {
if (!IsReadableStreamBYOBReader(this)) {
return promiseRejectedWith(byobReaderBrandCheckException('closed'));
}
return this._closedPromise;
}
/**
* If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.
*/
cancel(reason = undefined) {
if (!IsReadableStreamBYOBReader(this)) {
return promiseRejectedWith(byobReaderBrandCheckException('cancel'));
}
if (this._ownerReadableStream === undefined) {
return promiseRejectedWith(readerLockException('cancel'));
}
return ReadableStreamReaderGenericCancel(this, reason);
}
/**
* Attempts to reads bytes into view, and returns a promise resolved with the result.
*
* If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.
*/
read(view) {
if (!IsReadableStreamBYOBReader(this)) {
return promiseRejectedWith(byobReaderBrandCheckException('read'));
}
if (!ArrayBuffer.isView(view)) {
return promiseRejectedWith(new TypeError('view must be an array buffer view'));
}
if (view.byteLength === 0) {
return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));
}
if (view.buffer.byteLength === 0) {
return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));
}
if (IsDetachedBuffer(view.buffer)) ;
if (this._ownerReadableStream === undefined) {
return promiseRejectedWith(readerLockException('read from'));
}
let resolvePromise;
let rejectPromise;
const promise = newPromise((resolve, reject) => {
resolvePromise = resolve;
rejectPromise = reject;
});
const readIntoRequest = {
_chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),
_closeSteps: chunk => resolvePromise({ value: chunk, done: true }),
_errorSteps: e => rejectPromise(e)
};
ReadableStreamBYOBReaderRead(this, view, readIntoRequest);
return promise;
}
/**
* Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.
* If the associated stream is errored when the lock is released, the reader will appear errored in the same way
* from now on; otherwise, the reader will appear closed.
*
* A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by
* the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to
* do so will throw a `TypeError` and leave the reader locked to the stream.
*/
releaseLock() {
if (!IsReadableStreamBYOBReader(this)) {
throw byobReaderBrandCheckException('releaseLock');
}
if (this._ownerReadableStream === undefined) {
return;
}
if (this._readIntoRequests.length > 0) {
throw new TypeError('Tried to release a reader lock when that reader has pending read() calls un-settled');
}
ReadableStreamReaderGenericRelease(this);
}
}
Object.defineProperties(ReadableStreamBYOBReader.prototype, {
cancel: { enumerable: true },
read: { enumerable: true },
releaseLock: { enumerable: true },
closed: { enumerable: true }
});
if (typeof SymbolPolyfill.toStringTag === 'symbol') {
Object.defineProperty(ReadableStreamBYOBReader.prototype, SymbolPolyfill.toStringTag, {
value: 'ReadableStreamBYOBReader',
configurable: true
});
}
// Abstract operations for the readers.
function IsReadableStreamBYOBReader(x) {
if (!typeIsObject(x)) {
return false;
}
if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {
return false;
}
return x instanceof ReadableStreamBYOBReader;
}
function ReadableStreamBYOBReaderRead(reader, view, readIntoRequest) {
const stream = reader._ownerReadableStream;
stream._disturbed = true;
if (stream._state === 'errored') {
readIntoRequest._errorSteps(stream._storedError);
}
else {
ReadableByteStreamControllerPullInto(stream._readableStreamController, view, readIntoRequest);
}
}
// Helper functions for the ReadableStreamBYOBReader.
function byobReaderBrandCheckException(name) {
return new TypeError(`ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);
}
function ExtractHighWaterMark(strategy, defaultHWM) {
const { highWaterMark } = strategy;
if (highWaterMark === undefined) {
return defaultHWM;
}
if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {
throw new RangeError('Invalid highWaterMark');
}
return highWaterMark;
}
function ExtractSizeAlgorithm(strategy) {
const { size } = strategy;
if (!size) {
return () => 1;
}
return size;
}
function convertQueuingStrategy(init, context) {
assertDictionary(init, context);
const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark;
const size = init === null || init === void 0 ? void 0 : init.size;
return {
highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),
size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)
};
}
function convertQueuingStrategySize(fn, context) {
assertFunction(fn, context);
return chunk => convertUnrestrictedDouble(fn(chunk));
}
function convertUnderlyingSink(original, context) {
assertDictionary(original, context);
const abort = original === null || original === void 0 ? void 0 : original.abort;
const close = original === null || original === void 0 ? void 0 : original.close;
const start = original === null || original === void 0 ? void 0 : original.start;
const type = original === null || original === void 0 ? void 0 : original.type;
const write = original === null || original === void 0 ? void 0 : original.write;
return {
abort: abort === undefined ?
undefined :
convertUnderlyingSinkAbortCallback(abort, original, `${context} has member 'abort' that`),
close: close === undefined ?
undefined :
convertUnderlyingSinkCloseCallback(close, original, `${context} has member 'close' that`),
start: start === undefined ?
undefined :
convertUnderlyingSinkStartCallback(start, original, `${context} has member 'start' that`),
write: write === undefined ?
undefined :
convertUnderlyingSinkWriteCallback(write, original, `${context} has member 'write' that`),
type
};
}
function convertUnderlyingSinkAbortCallback(fn, original, context) {
assertFunction(fn, context);
return (reason) => promiseCall(fn, original, [reason]);
}
function convertUnderlyingSinkCloseCallback(fn, original, context) {
assertFunction(fn, context);
return () => promiseCall(fn, original, []);
}
function convertUnderlyingSinkStartCallback(fn, original, context) {
assertFunction(fn, context);
return (controller) => reflectCall(fn, original, [controller]);
}
function convertUnderlyingSinkWriteCallback(fn, original, context) {
assertFunction(fn, context);
return (chunk, controller) => promiseCall(fn, original, [chunk, controller]);
}
function assertWritableStream(x, context) {
if (!IsWritableStream(x)) {
throw new TypeError(`${context} is not a WritableStream.`);
}
}
function isAbortSignal(value) {
if (typeof value !== 'object' || value === null) {
return false;
}
try {
return typeof value.aborted === 'boolean';
}
catch (_a) {
// AbortSignal.prototype.aborted throws if its brand check fails
return false;
}
}
const supportsAbortController = typeof AbortController === 'function';
/**
* Construct a new AbortController, if supported by the platform.
*
* @internal
*/
function createAbortController() {
if (supportsAbortController) {
return new AbortController();
}
return undefined;
}
/**
* A writable stream represents a destination for data, into which you can write.
*
* @public
*/
class WritableStream {
constructor(rawUnderlyingSink = {}, rawStrategy = {}) {
if (rawUnderlyingSink === undefined) {
rawUnderlyingSink = null;
}
else {
assertObject(rawUnderlyingSink, 'First parameter');
}
const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');
const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');
InitializeWritableStream(this);
const type = underlyingSink.type;
if (type !== undefined) {
throw new RangeError('Invalid type is specified');
}
const sizeAlgorithm = ExtractSizeAlgorithm(strategy);
const highWaterMark = ExtractHighWaterMark(strategy, 1);
SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);
}
/**
* Returns whether or not the writable stream is locked to a writer.
*/
get locked() {
if (!IsWritableStream(this)) {
throw streamBrandCheckException$2('locked');
}
return IsWritableStreamLocked(this);
}
/**
* Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be
* immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort
* mechanism of the underlying sink.
*
* The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled
* that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel
* the stream) if the stream is currently locked.
*/
abort(reason = undefined) {
if (!IsWritableStream(this)) {
return promiseRejectedWith(streamBrandCheckException$2('abort'));
}
if (IsWritableStreamLocked(this)) {
return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));
}
return WritableStreamAbort(this, reason);
}
/**
* Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its
* close behavior. During this time any further attempts to write will fail (without erroring the stream).
*
* The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream
* successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with
* a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.
*/
close() {
if (!IsWritableStream(this)) {
return promiseRejectedWith(streamBrandCheckException$2('close'));
}
if (IsWritableStreamLocked(this)) {
return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));
}
if (WritableStreamCloseQueuedOrInFlight(this)) {
return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));
}
return WritableStreamClose(this);
}
/**
* Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream
* is locked, no other writer can be acquired until this one is released.
*
* This functionality is especially useful for creating abstractions that desire the ability to write to a stream
* without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at
* the same time, which would cause the resulting written data to be unpredictable and probably useless.
*/
getWriter() {
if (!IsWritableStream(this)) {
throw streamBrandCheckException$2('getWriter');
}
return AcquireWritableStreamDefaultWriter(this);
}
}
Object.defineProperties(WritableStream.prototype, {
abort: { enumerable: true },
close: { enumerable: true },
getWriter: { enumerable: true },
locked: { enumerable: true }
});
if (typeof SymbolPolyfill.toStringTag === 'symbol') {
Object.defineProperty(WritableStream.prototype, SymbolPolyfill.toStringTag, {
value: 'WritableStream',
configurable: true
});
}
// Abstract operations for the WritableStream.
function AcquireWritableStreamDefaultWriter(stream) {
return new WritableStreamDefaultWriter(stream);
}
// Throws if and only if startAlgorithm throws.
function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) {
const stream = Object.create(WritableStream.prototype);
InitializeWritableStream(stream);
const controller = Object.create(WritableStreamDefaultController.prototype);
SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm);
return stream;
}
function InitializeWritableStream(stream) {
stream._state = 'writable';
// The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is
// 'erroring' or 'errored'. May be set to an undefined value.
stream._storedError = undefined;
stream._writer = undefined;
// Initialize to undefined first because the constructor of the controller checks this
// variable to validate the caller.
stream._writableStreamController = undefined;
// This queue is placed here instead of the writer class in order to allow for passing a writer to the next data
// producer without waiting for the queued writes to finish.
stream._writeRequests = new SimpleQueue();
// Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents
// them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.
stream._inFlightWriteRequest = undefined;
// The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer
// has been detached.
stream._closeRequest = undefined;
// Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it
// from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.
stream._inFlightCloseRequest = undefined;
// The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.
stream._pendingAbortRequest = undefined;
// The backpressure signal set by the controller.
stream._backpressure = false;
}
function IsWritableStream(x) {
if (!typeIsObject(x)) {
return false;
}
if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {
return false;
}
return x instanceof WritableStream;
}
function IsWritableStreamLocked(stream) {
assert(IsWritableStream(stream));
if (stream._writer === undefined) {
return false;
}
return true;
}
function WritableStreamAbort(stream, reason) {
var _a;
if (stream._state === 'closed' || stream._state === 'errored') {
return promiseResolvedWith(undefined);
}
stream._writableStreamController._abortReason = reason;
(_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort();
// TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',
// but it doesn't know that signaling abort runs author code that might have changed the state.
// Widen the type again by casting to WritableStreamState.
const state = stream._state;
if (state === 'closed' || state === 'errored') {
return promiseResolvedWith(undefined);
}
if (stream._pendingAbortRequest !== undefined) {
return stream._pendingAbortRequest._promise;
}
let wasAlreadyErroring = false;
if (state === 'erroring') {
wasAlreadyErroring = true;
// reason will not be used, so don't keep a reference to it.
reason = undefined;
}
const promise = newPromise((resolve, reject) => {
stream._pendingAbortRequest = {
_promise: undefined,
_resolve: resolve,
_reject: reject,
_reason: reason,
_wasAlreadyErroring: wasAlreadyErroring
};
});
stream._pendingAbortRequest._promise = promise;
if (!wasAlreadyErroring) {
WritableStreamStartErroring(stream, reason);
}
return promise;
}
function WritableStreamClose(stream) {
const state = stream._state;
if (state === 'closed' || state === 'errored') {
return promiseRejectedWith(new TypeError(`The stream (in ${state} state) is not in the writable state and cannot be closed`));
}
assert(!WritableStreamCloseQueuedOrInFlight(stream));
const promise = newPromise((resolve, reject) => {
const closeRequest = {
_resolve: resolve,
_reject: reject
};
stream._closeRequest = closeRequest;
});
const writer = stream._writer;
if (writer !== undefined && stream._backpressure && state === 'writable') {
defaultWriterReadyPromiseResolve(writer);
}
WritableStreamDefaultControllerClose(stream._writableStreamController);
return promise;
}
// WritableStream API exposed for controllers.
function WritableStreamAddWriteRequest(stream) {
assert(IsWritableStreamLocked(stream));
assert(stream._state === 'writable');
const promise = newPromise((resolve, reject) => {
const writeRequest = {
_resolve: resolve,
_reject: reject
};
stream._writeRequests.push(writeRequest);
});
return promise;
}
function WritableStreamDealWithRejection(stream, error) {
const state = stream._state;
if (state === 'writable') {
WritableStreamStartErroring(stream, error);
return;
}
WritableStreamFinishErroring(stream);
}
function WritableStreamStartErroring(stream, reason) {
assert(stream._storedError === undefined);
assert(stream._state === 'writable');
const controller = stream._writableStreamController;
stream._state = 'erroring';
stream._storedError = reason;
const writer = stream._writer;
if (writer !== undefined) {
WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);
}
if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {
WritableStreamFinishErroring(stream);
}
}
function WritableStreamFinishErroring(stream) {
assert(stream._state === 'erroring');
assert(!WritableStreamHasOperationMarkedInFlight(stream));
stream._state = 'errored';
stream._writableStreamController[ErrorSteps]();
const storedError = stream._storedError;
stream._writeRequests.forEach(writeRequest => {
writeRequest._reject(storedError);
});
stream._writeRequests = new SimpleQueue();
if (stream._pendingAbortRequest === undefined) {
WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
return;
}
const abortRequest = stream._pendingAbortRequest;
stream._pendingAbortRequest = undefined;
if (abortRequest._wasAlreadyErroring) {
abortRequest._reject(storedError);
WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
return;
}
const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);
uponPromise(promise, () => {
abortRequest._resolve();
WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
}, (reason) => {
abortRequest._reject(reason);
WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
});
}
function WritableStreamFinishInFlightWrite(stream) {
assert(stream._inFlightWriteRequest !== undefined);
stream._inFlightWriteRequest._resolve(undefined);
stream._inFlightWriteRequest = undefined;
}
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);
}
function WritableStreamFinishInFlightClose(stream) {
assert(stream._inFlightCloseRequest !== undefined);
stream._inFlightCloseRequest._resolve(undefined);
stream._inFlightCloseRequest = undefined;
const state = stream._state;
if (state === 'erroring') {
// The error was too late to do anything, so it is ignored.
stream._storedError = undefined;
if (stream._pendingAbortRequest !== undefined) {
stream._pendingAbortRequest._resolve();
stream._pendingAbortRequest = undefined;
}
}
stream._state = 'closed';
const writer = stream._writer;
if (writer !== undefined) {
defaultWriterClosedPromiseResolve(writer);
}
assert(stream._pendingAbortRequest === undefined);
assert(stream._storedError === undefined);
}
function WritableStreamFinishInFlightCloseWithError(stream, error) {
assert(stream._inFlightCloseRequest !== undefined);
stream._inFlightCloseRequest._reject(error);
stream._inFlightCloseRequest = undefined;
assert(stream._state === 'writable' || stream._state === 'erroring');
// Never execute sink abort() after sink close().
if (stream._pendingAbortRequest !== undefined) {
stream._pendingAbortRequest._reject(error);
stream._pendingAbortRequest = undefined;
}
WritableStreamDealWithRejection(stream, error);
}
// TODO(ricea): Fix alphabetical order.
function WritableStreamCloseQueuedOrInFlight(stream) {
if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {
return false;
}
return true;
}
function WritableStreamHasOperationMarkedInFlight(stream) {
if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {
return false;
}
return true;
}
function WritableStreamMarkCloseRequestInFlight(stream) {
assert(stream._inFlightCloseRequest === undefined);
assert(stream._closeRequest !== undefined);
stream._inFlightCloseRequest = stream._closeRequest;
stream._closeRequest = undefined;
}
function WritableStreamMarkFirstWriteRequestInFlight(stream) {
assert(stream._inFlightWriteRequest === undefined);
assert(stream._writeRequests.length !== 0);
stream._inFlightWriteRequest = stream._writeRequests.shift();
}
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) {
defaultWriterClosedPromiseReject(writer, stream._storedError);
}
}
function WritableStreamUpdateBackpressure(stream, backpressure) {
assert(stream._state === 'writable');
assert(!WritableStreamCloseQueuedOrInFlight(stream));
const writer = stream._writer;
if (writer !== undefined && backpressure !== stream._backpressure) {
if (backpressure) {
defaultWriterReadyPromiseReset(writer);
}
else {
defaultWriterReadyPromiseResolve(writer);
}
}
stream._backpressure = backpressure;
}
/**
* A default writer vended by a {@link WritableStream}.
*
* @public
*/
class WritableStreamDefaultWriter {
constructor(stream) {
assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');
assertWritableStream(stream, 'First parameter');
if (IsWritableStreamLocked(stream)) {
throw new TypeError('This stream has already been locked for exclusive writing by another writer');
}
this._ownerWritableStream = stream;
stream._writer = this;
const state = stream._state;
if (state === 'writable') {
if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {
defaultWriterReadyPromiseInitialize(this);
}
else {
defaultWriterReadyPromiseInitializeAsResolved(this);
}
defaultWriterClosedPromiseInitialize(this);
}
else if (state === 'erroring') {
defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);
defaultWriterClosedPromiseInitialize(this);
}
else if (state === 'closed') {
defaultWriterReadyPromiseInitializeAsResolved(this);
defaultWriterClosedPromiseInitializeAsResolved(this);
}
else {
const storedError = stream._storedError;
defaultWriterReadyPromiseInitializeAsRejected(this, storedError);
defaultWriterClosedPromiseInitializeAsRejected(this, storedError);
}
}
/**
* Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or
* the writer’s lock is released before the stream finishes closing.
*/
get closed() {
if (!IsWritableStreamDefaultWriter(this)) {
return promiseRejectedWith(defaultWriterBrandCheckException('closed'));
}
return this._closedPromise;
}
/**
* Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.
* A producer can use this information to determine the right amount of data to write.
*
* It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort
* queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when
* the writer’s lock is released.
*/
get desiredSize() {
if (!IsWritableStreamDefaultWriter(this)) {
throw defaultWriterBrandCheckException('desiredSize');
}
if (this._ownerWritableStream === undefined) {
throw defaultWriterLockException('desiredSize');
}
return WritableStreamDefaultWriterGetDesiredSize(this);
}
/**
* Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions
* from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips
* back to zero or below, the getter will return a new promise that stays pending until the next transition.
*
* If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become
* rejected.
*/
get ready() {
if (!IsWritableStreamDefaultWriter(this)) {
return promiseRejectedWith(defaultWriterBrandCheckException('ready'));
}
return this._readyPromise;
}
/**
* If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.
*/
abort(reason = undefined) {
if (!IsWritableStreamDefaultWriter(this)) {
return promiseRejectedWith(defaultWriterBrandCheckException('abort'));
}
if (this._ownerWritableStream === undefined) {
return promiseRejectedWith(defaultWriterLockException('abort'));
}
return WritableStreamDefaultWriterAbort(this, reason);
}
/**
* If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.
*/
close() {
if (!IsWritableStreamDefaultWriter(this)) {
return promiseRejectedWith(defaultWriterBrandCheckException('close'));
}
const stream = this._ownerWritableStream;
if (stream === undefined) {
return promiseRejectedWith(defaultWriterLockException('close'));
}
if (WritableStreamCloseQueuedOrInFlight(stream)) {
return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));
}
return WritableStreamDefaultWriterClose(this);
}
/**
* Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.
* If the associated stream is errored when the lock is released, the writer will appear errored in the same way from
* now on; otherwise, the writer will appear closed.
*
* Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the
* promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).
* It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents
* other producers from writing in an interleaved manner.
*/
releaseLock() {
if (!IsWritableStreamDefaultWriter(this)) {
throw defaultWriterBrandCheckException('releaseLock');
}
const stream = this._ownerWritableStream;
if (stream === undefined) {
return;
}
assert(stream._writer !== undefined);
WritableStreamDefaultWriterRelease(this);
}
write(chunk = undefined) {
if (!IsWritableStreamDefaultWriter(this)) {
return promiseRejectedWith(defaultWriterBrandCheckException('write'));
}
if (this._ownerWritableStream === undefined) {
return promiseRejectedWith(defaultWriterLockException('write to'));
}
return WritableStreamDefaultWriterWrite(this, chunk);
}
}
Object.defineProperties(WritableStreamDefaultWriter.prototype, {
abort: { enumerable: true },
close: { enumerable: true },
releaseLock: { enumerable: true },
write: { enumerable: true },
closed: { enumerable: true },
desiredSize: { enumerable: true },
ready: { enumerable: true }
});
if (typeof SymbolPolyfill.toStringTag === 'symbol') {
Object.defineProperty(WritableStreamDefaultWriter.prototype, SymbolPolyfill.toStringTag, {
value: 'WritableStreamDefaultWriter',
configurable: true
});
}
// Abstract operations for the WritableStreamDefaultWriter.
function IsWritableStreamDefaultWriter(x) {
if (!typeIsObject(x)) {
return false;
}
if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {
return false;
}
return x instanceof WritableStreamDefaultWriter;
}
// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.
function WritableStreamDefaultWriterAbort(writer, reason) {
const stream = writer._ownerWritableStream;
return WritableStreamAbort(stream, reason);
}
function WritableStreamDefaultWriterClose(writer) {
const stream = writer._ownerWritableStream;
return WritableStreamClose(stream);
}
function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) {
const stream = writer._ownerWritableStream;
const state = stream._state;
if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {
return promiseResolvedWith(undefined);
}
if (state === 'errored') {
return promiseRejectedWith(stream._storedError);
}
return WritableStreamDefaultWriterClose(writer);
}
function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) {
if (writer._closedPromiseState === 'pending') {
defaultWriterClosedPromiseReject(writer, error);
}
else {
defaultWriterClosedPromiseResetToRejected(writer, error);
}
}
function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) {
if (writer._readyPromiseState === 'pending') {
defaultWriterReadyPromiseReject(writer, error);
}
else {
defaultWriterReadyPromiseResetToRejected(writer, error);
}
}
function WritableStreamDefaultWriterGetDesiredSize(writer) {
const stream = writer._ownerWritableStream;
const state = stream._state;
if (state === 'errored' || state === 'erroring') {
return null;
}
if (state === 'closed') {
return 0;
}
return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);
}
function WritableStreamDefaultWriterRelease(writer) {
const stream = writer._ownerWritableStream;
assert(stream._writer === writer);
const releasedError = new TypeError(`Writer was released and can no longer be used to monitor the stream's closedness`);
WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);
// The state transitions to "errored" before the sink abort() method runs, but the writer.closed promise is not
// rejected until afterwards. This means that simply testing state will not work.
WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);
stream._writer = undefined;
writer._ownerWritableStream = undefined;
}
function WritableStreamDefaultWriterWrite(writer, chunk) {
const stream = writer._ownerWritableStream;
const controller = stream._writableStreamController;
const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);
if (stream !== writer._ownerWritableStream) {
return promiseRejectedWith(defaultWriterLockException('write to'));
}
const state = stream._state;
if (state === 'errored') {
return promiseRejectedWith(stream._storedError);
}
if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {
return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));
}
if (state === 'erroring') {
return promiseRejectedWith(stream._storedError);
}
const promise = WritableStreamAddWriteRequest(stream);
WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);
return promise;
}
const closeSentinel = {};
/**
* Allows control of a {@link WritableStream | writable stream}'s state and internal queue.
*
* @public
*/
class WritableStreamDefaultController {
constructor() {
throw new TypeError('Illegal constructor');
}
/**
* The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.
*
* @deprecated
* This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.
* Use {@link WritableStreamDefaultController.signal}'s `reason` instead.
*/
get abortReason() {
if (!IsWritableStreamDefaultController(this)) {
throw defaultControllerBrandCheckException$2('abortReason');
}
return this._abortReason;
}
/**
* An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.
*/
get signal() {
if (!IsWritableStreamDefaultController(this)) {
throw defaultControllerBrandCheckException$2('signal');
}
if (this._abortController === undefined) {
// Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.
// We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,
// so instead we only implement support for `signal` if we find a global `AbortController` constructor.
throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');
}
return this._abortController.signal;
}
/**
* Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.
*
* This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying
* sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the
* normal lifecycle of interactions with the underlying sink.
*/
error(e = undefined) {
if (!IsWritableStreamDefaultController(this)) {
throw defaultControllerBrandCheckException$2('error');
}
const state = this._controlledWritableStream._state;
if (state !== 'writable') {
// The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so
// just treat it as a no-op.
return;
}
WritableStreamDefaultControllerError(this, e);
}
/** @internal */
[AbortSteps](reason) {
const result = this._abortAlgorithm(reason);
WritableStreamDefaultControllerClearAlgorithms(this);
return result;
}
/** @internal */
[ErrorSteps]() {
ResetQueue(this);
}
}
Object.defineProperties(WritableStreamDefaultController.prototype, {
abortReason: { enumerable: true },
signal: { enumerable: true },
error: { enumerable: true }
});
if (typeof SymbolPolyfill.toStringTag === 'symbol') {
Object.defineProperty(WritableStreamDefaultController.prototype, SymbolPolyfill.toStringTag, {
value: 'WritableStreamDefaultController',
configurable: true
});
}
// Abstract operations implementing interface required by the WritableStream.
function IsWritableStreamDefaultController(x) {
if (!typeIsObject(x)) {
return false;
}
if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {
return false;
}
return x instanceof WritableStreamDefaultController;
}
function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) {
assert(IsWritableStream(stream));
assert(stream._writableStreamController === undefined);
controller._controlledWritableStream = stream;
stream._writableStreamController = controller;
// Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.
controller._queue = undefined;
controller._queueTotalSize = undefined;
ResetQueue(controller);
controller._abortReason = undefined;
controller._abortController = createAbortController();
controller._started = false;
controller._strategySizeAlgorithm = sizeAlgorithm;
controller._strategyHWM = highWaterMark;
controller._writeAlgorithm = writeAlgorithm;
controller._closeAlgorithm = closeAlgorithm;
controller._abortAlgorithm = abortAlgorithm;
const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);
WritableStreamUpdateBackpressure(stream, backpressure);
const startResult = startAlgorithm();
const startPromise = promiseResolvedWith(startResult);
uponPromise(startPromise, () => {
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);
});
}
function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) {
const controller = Object.create(WritableStreamDefaultController.prototype);
let startAlgorithm = () => undefined;
let writeAlgorithm = () => promiseResolvedWith(undefined);
let closeAlgorithm = () => promiseResolvedWith(undefined);
let abortAlgorithm = () => promiseResolvedWith(undefined);
if (underlyingSink.start !== undefined) {
startAlgorithm = () => underlyingSink.start(controller);
}
if (underlyingSink.write !== undefined) {
writeAlgorithm = chunk => underlyingSink.write(chunk, controller);
}
if (underlyingSink.close !== undefined) {
closeAlgorithm = () => underlyingSink.close();
}
if (underlyingSink.abort !== undefined) {
abortAlgorithm = reason => underlyingSink.abort(reason);
}
SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm);
}
// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.
function WritableStreamDefaultControllerClearAlgorithms(controller) {
controller._writeAlgorithm = undefined;
controller._closeAlgorithm = undefined;
controller._abortAlgorithm = undefined;
controller._strategySizeAlgorithm = undefined;
}
function WritableStreamDefaultControllerClose(controller) {
EnqueueValueWithSize(controller, closeSentinel, 0);
WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);
}
function WritableStreamDefaultControllerGetChunkSize(controller, chunk) {
try {
return controller._strategySizeAlgorithm(chunk);
}
catch (chunkSizeE) {
WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);
return 1;
}
}
function WritableStreamDefaultControllerGetDesiredSize(controller) {
return controller._strategyHWM - controller._queueTotalSize;
}
function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) {
try {
EnqueueValueWithSize(controller, chunk, chunkSize);
}
catch (enqueueE) {
WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);
return;
}
const stream = controller._controlledWritableStream;
if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {
const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);
WritableStreamUpdateBackpressure(stream, backpressure);
}
WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);
}
// Abstract operations for the WritableStreamDefaultController.
function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) {
const stream = controller._controlledWritableStream;
if (!controller._started) {
return;
}
if (stream._inFlightWriteRequest !== undefined) {
return;
}
const state = stream._state;
if (state === 'erroring') {
WritableStreamFinishErroring(stream);
return;
}
if (controller._queue.length === 0) {
return;
}
const value = PeekQueueValue(controller);
if (value === closeSentinel) {
WritableStreamDefaultControllerProcessClose(controller);
}
else {
WritableStreamDefaultControllerProcessWrite(controller, value);
}
}
function WritableStreamDefaultControllerErrorIfNeeded(controller, error) {
if (controller._controlledWritableStream._state === 'writable') {
WritableStreamDefaultControllerError(controller, error);
}
}
function WritableStreamDefaultControllerProcessClose(controller) {
const stream = controller._controlledWritableStream;
WritableStreamMarkCloseRequestInFlight(stream);
DequeueValue(controller);
assert(controller._queue.length === 0);
const sinkClosePromise = controller._closeAlgorithm();
WritableStreamDefaultControllerClearAlgorithms(controller);
uponPromise(sinkClosePromise, () => {
WritableStreamFinishInFlightClose(stream);
}, reason => {
WritableStreamFinishInFlightCloseWithError(stream, reason);
});
}
function WritableStreamDefaultControllerProcessWrite(controller, chunk) {
const stream = controller._controlledWritableStream;
WritableStreamMarkFirstWriteRequestInFlight(stream);
const sinkWritePromise = controller._writeAlgorithm(chunk);
uponPromise(sinkWritePromise, () => {
WritableStreamFinishInFlightWrite(stream);
const state = stream._state;
DequeueValue(controller);
if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {
const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);
WritableStreamUpdateBackpressure(stream, backpressure);
}
WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);
}, reason => {
if (stream._state === 'writable') {
WritableStreamDefaultControllerClearAlgorithms(controller);
}
WritableStreamFinishInFlightWriteWithError(stream, reason);
});
}
function WritableStreamDefaultControllerGetBackpressure(controller) {
const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);
return desiredSize <= 0;
}
// A client of WritableStreamDefaultController may use these functions directly to bypass state check.
function WritableStreamDefaultControllerError(controller, error) {
const stream = controller._controlledWritableStream;
assert(stream._state === 'writable');
WritableStreamDefaultControllerClearAlgorithms(controller);
WritableStreamStartErroring(stream, error);
}
// Helper functions for the WritableStream.
function streamBrandCheckException$2(name) {
return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);
}
// Helper functions for the WritableStreamDefaultController.
function defaultControllerBrandCheckException$2(name) {
return new TypeError(`WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);
}
// Helper functions for the WritableStreamDefaultWriter.
function defaultWriterBrandCheckException(name) {
return new TypeError(`WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);
}
function defaultWriterLockException(name) {
return new TypeError('Cannot ' + name + ' a stream using a released writer');
}
function defaultWriterClosedPromiseInitialize(writer) {
writer._closedPromise = newPromise((resolve, reject) => {
writer._closedPromise_resolve = resolve;
writer._closedPromise_reject = reject;
writer._closedPromiseState = 'pending';
});
}
function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) {
defaultWriterClosedPromiseInitialize(writer);
defaultWriterClosedPromiseReject(writer, reason);
}
function defaultWriterClosedPromiseInitializeAsResolved(writer) {
defaultWriterClosedPromiseInitialize(writer);
defaultWriterClosedPromiseResolve(writer);
}
function defaultWriterClosedPromiseReject(writer, reason) {
if (writer._closedPromise_reject === undefined) {
return;
}
assert(writer._closedPromiseState === 'pending');
setPromiseIsHandledToTrue(writer._closedPromise);
writer._closedPromise_reject(reason);
writer._closedPromise_resolve = undefined;
writer._closedPromise_reject = undefined;
writer._closedPromiseState = 'rejected';
}
function defaultWriterClosedPromiseResetToRejected(writer, reason) {
assert(writer._closedPromise_resolve === undefined);
assert(writer._closedPromise_reject === undefined);
assert(writer._closedPromiseState !== 'pending');
defaultWriterClosedPromiseInitializeAsRejected(writer, reason);
}
function defaultWriterClosedPromiseResolve(writer) {
if (writer._closedPromise_resolve === undefined) {
return;
}
assert(writer._closedPromiseState === 'pending');
writer._closedPromise_resolve(undefined);
writer._closedPromise_resolve = undefined;
writer._closedPromise_reject = undefined;
writer._closedPromiseState = 'resolved';
}
function defaultWriterReadyPromiseInitialize(writer) {
writer._readyPromise = newPromise((resolve, reject) => {
writer._readyPromise_resolve = resolve;
writer._readyPromise_reject = reject;
});
writer._readyPromiseState = 'pending';
}
function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) {
defaultWriterReadyPromiseInitialize(writer);
defaultWriterReadyPromiseReject(writer, reason);
}
function defaultWriterReadyPromiseInitializeAsResolved(writer) {
defaultWriterReadyPromiseInitialize(writer);
defaultWriterReadyPromiseResolve(writer);
}
function defaultWriterReadyPromiseReject(writer, reason) {
if (writer._readyPromise_reject === undefined) {
return;
}
setPromiseIsHandledToTrue(writer._readyPromise);
writer._readyPromise_reject(reason);
writer._readyPromise_resolve = undefined;
writer._readyPromise_reject = undefined;
writer._readyPromiseState = 'rejected';
}
function defaultWriterReadyPromiseReset(writer) {
assert(writer._readyPromise_resolve === undefined);
assert(writer._readyPromise_reject === undefined);
defaultWriterReadyPromiseInitialize(writer);
}
function defaultWriterReadyPromiseResetToRejected(writer, reason) {
assert(writer._readyPromise_resolve === undefined);
assert(writer._readyPromise_reject === undefined);
defaultWriterReadyPromiseInitializeAsRejected(writer, reason);
}
function defaultWriterReadyPromiseResolve(writer) {
if (writer._readyPromise_resolve === undefined) {
return;
}
writer._readyPromise_resolve(undefined);
writer._readyPromise_resolve = undefined;
writer._readyPromise_reject = undefined;
writer._readyPromiseState = 'fulfilled';
}
/// <reference lib="dom" />
const NativeDOMException = typeof DOMException !== 'undefined' ? DOMException : undefined;
/// <reference types="node" />
function isDOMExceptionConstructor(ctor) {
if (!(typeof ctor === 'function' || typeof ctor === 'object')) {
return false;
}
try {
new ctor();
return true;
}
catch (_a) {
return false;
}
}
function createDOMExceptionPolyfill() {
// eslint-disable-next-line no-shadow
const ctor = function DOMException(message, name) {
this.message = message || '';
this.name = name || 'Error';
if (Error.captureStackTrace) {
Error.captureStackTrace(this, this.constructor);
}
};
ctor.prototype = Object.create(Error.prototype);
Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });
return ctor;
}
// eslint-disable-next-line no-redeclare
const DOMException$1 = isDOMExceptionConstructor(NativeDOMException) ? NativeDOMException : createDOMExceptionPolyfill();
function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) {
assert(IsReadableStream(source));
assert(IsWritableStream(dest));
assert(signal === undefined || isAbortSignal(signal));
assert(!IsReadableStreamLocked(source));
assert(!IsWritableStreamLocked(dest));
const reader = AcquireReadableStreamDefaultReader(source);
const writer = AcquireWritableStreamDefaultWriter(dest);
source._disturbed = true;
let shuttingDown = false;
// This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.
let currentWrite = promiseResolvedWith(undefined);
return newPromise((resolve, reject) => {
let abortAlgorithm;
if (signal !== undefined) {
abortAlgorithm = () => {
const error = new DOMException$1('Aborted', 'AbortError');
const actions = [];
if (!preventAbort) {
actions.push(() => {
if (dest._state === 'writable') {
return WritableStreamAbort(dest, error);
}
return promiseResolvedWith(undefined);
});
}
if (!preventCancel) {
actions.push(() => {
if (source._state === 'readable') {
return ReadableStreamCancel(source, error);
}
return promiseResolvedWith(undefined);
});
}
shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);
};
if (signal.aborted) {
abortAlgorithm();
return;
}
signal.addEventListener('abort', abortAlgorithm);
}
// Using reader and writer, read all chunks from this and write them to dest
// - Backpressure must be enforced
// - Shutdown must stop all activity
function pipeLoop() {
return newPromise((resolveLoop, rejectLoop) => {
function next(done) {
if (done) {
resolveLoop();
}
else {
// Use `PerformPromiseThen` instead of `uponPromise` to avoid
// adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers
PerformPromiseThen(pipeStep(), next, rejectLoop);
}
}
next(false);
});
}
function pipeStep() {
if (shuttingDown) {
return promiseResolvedWith(true);
}
return PerformPromiseThen(writer._readyPromise, () => {
return newPromise((resolveRead, rejectRead) => {
ReadableStreamDefaultReaderRead(reader, {
_chunkSteps: chunk => {
currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);
resolveRead(false);
},
_closeSteps: () => resolveRead(true),
_errorSteps: rejectRead
});
});
});
}
// Errors must be propagated forward
isOrBecomesErrored(source, reader._closedPromise, storedError => {
if (!preventAbort) {
shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);
}
else {
shutdown(true, storedError);
}
});
// Errors must be propagated backward
isOrBecomesErrored(dest, writer._closedPromise, storedError => {
if (!preventCancel) {
shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);
}
else {
shutdown(true, storedError);
}
});
// Closing must be propagated forward
isOrBecomesClosed(source, reader._closedPromise, () => {
if (!preventClose) {
shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));
}
else {
shutdown();
}
});
// Closing must be propagated backward
if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {
const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');
if (!preventCancel) {
shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);
}
else {
shutdown(true, destClosed);
}
}
setPromiseIsHandledToTrue(pipeLoop());
function waitForWritesToFinish() {
// Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait
// for that too.
const oldCurrentWrite = currentWrite;
return PerformPromiseThen(currentWrite, () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined);
}
function isOrBecomesErrored(stream, promise, action) {
if (stream._state === 'errored') {
action(stream._storedError);
}
else {
uponRejection(promise, action);
}
}
function isOrBecomesClosed(stream, promise, action) {
if (stream._state === 'closed') {
action();
}
else {
uponFulfillment(promise, action);
}
}
function shutdownWithAction(action, originalIsError, originalError) {
if (shuttingDown) {
return;
}
shuttingDown = true;
if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {
uponFulfillment(waitForWritesToFinish(), doTheRest);
}
else {
doTheRest();
}
function doTheRest() {
uponPromise(action(), () => finalize(originalIsError, originalError), newError => finalize(true, newError));
}
}
function shutdown(isError, error) {
if (shuttingDown) {
return;
}
shuttingDown = true;
if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {
uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));
}
else {
finalize(isError, error);
}
}
function finalize(isError, error) {
WritableStreamDefaultWriterRelease(writer);
ReadableStreamReaderGenericRelease(reader);
if (signal !== undefined) {
signal.removeEventListener('abort', abortAlgorithm);
}
if (isError) {
reject(error);
}
else {
resolve(undefined);
}
}
});
}
/**
* Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.
*
* @public
*/
class ReadableStreamDefaultController {
constructor() {
throw new TypeError('Illegal constructor');
}
/**
* Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is
* over-full. An underlying source ought to use this information to determine when and how to apply backpressure.
*/
get desiredSize() {
if (!IsReadableStreamDefaultController(this)) {
throw defaultControllerBrandCheckException$1('desiredSize');
}
return ReadableStreamDefaultControllerGetDesiredSize(this);
}
/**
* Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from
* the stream, but once those are read, the stream will become closed.
*/
close() {
if (!IsReadableStreamDefaultController(this)) {
throw defaultControllerBrandCheckException$1('close');
}
if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {
throw new TypeError('The stream is not in a state that permits close');
}
ReadableStreamDefaultControllerClose(this);
}
enqueue(chunk = undefined) {
if (!IsReadableStreamDefaultController(this)) {
throw defaultControllerBrandCheckException$1('enqueue');
}
if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {
throw new TypeError('The stream is not in a state that permits enqueue');
}
return ReadableStreamDefaultControllerEnqueue(this, chunk);
}
/**
* Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.
*/
error(e = undefined) {
if (!IsReadableStreamDefaultController(this)) {
throw defaultControllerBrandCheckException$1('error');
}
ReadableStreamDefaultControllerError(this, e);
}
/** @internal */
[CancelSteps](reason) {
ResetQueue(this);
const result = this._cancelAlgorithm(reason);
ReadableStreamDefaultControllerClearAlgorithms(this);
return result;
}
/** @internal */
[PullSteps](readRequest) {
const stream = this._controlledReadableStream;
if (this._queue.length > 0) {
const chunk = DequeueValue(this);
if (this._closeRequested && this._queue.length === 0) {
ReadableStreamDefaultControllerClearAlgorithms(this);
ReadableStreamClose(stream);
}
else {
ReadableStreamDefaultControllerCallPullIfNeeded(this);
}
readRequest._chunkSteps(chunk);
}
else {
ReadableStreamAddReadRequest(stream, readRequest);
ReadableStreamDefaultControllerCallPullIfNeeded(this);
}
}
}
Object.defineProperties(ReadableStreamDefaultController.prototype, {
close: { enumerable: true },
enqueue: { enumerable: true },
error: { enumerable: true },
desiredSize: { enumerable: true }
});
if (typeof SymbolPolyfill.toStringTag === 'symbol') {
Object.defineProperty(ReadableStreamDefaultController.prototype, SymbolPolyfill.toStringTag, {
value: 'ReadableStreamDefaultController',
configurable: true
});
}
// Abstract operations for the ReadableStreamDefaultController.
function IsReadableStreamDefaultController(x) {
if (!typeIsObject(x)) {
return false;
}
if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {
return false;
}
return x instanceof ReadableStreamDefaultController;
}
function ReadableStreamDefaultControllerCallPullIfNeeded(controller) {
const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);
if (!shouldPull) {
return;
}
if (controller._pulling) {
controller._pullAgain = true;
return;
}
assert(!controller._pullAgain);
controller._pulling = true;
const pullPromise = controller._pullAlgorithm();
uponPromise(pullPromise, () => {
controller._pulling = false;
if (controller._pullAgain) {
controller._pullAgain = false;
ReadableStreamDefaultControllerCallPullIfNeeded(controller);
}
}, e => {
ReadableStreamDefaultControllerError(controller, e);
});
}
function ReadableStreamDefaultControllerShouldCallPull(controller) {
const stream = controller._controlledReadableStream;
if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {
return false;
}
if (!controller._started) {
return false;
}
if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {
return true;
}
const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);
if (desiredSize > 0) {
return true;
}
return false;
}
function ReadableStreamDefaultControllerClearAlgorithms(controller) {
controller._pullAlgorithm = undefined;
controller._cancelAlgorithm = undefined;
controller._strategySizeAlgorithm = undefined;
}
// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.
function ReadableStreamDefaultControllerClose(controller) {
if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {
return;
}
const stream = controller._controlledReadableStream;
controller._closeRequested = true;
if (controller._queue.length === 0) {
ReadableStreamDefaultControllerClearAlgorithms(controller);
ReadableStreamClose(stream);
}
}
function ReadableStreamDefaultControllerEnqueue(controller, chunk) {
if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {
return;
}
const stream = controller._controlledReadableStream;
if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {
ReadableStreamFulfillReadRequest(stream, chunk, false);
}
else {
let chunkSize;
try {
chunkSize = controller._strategySizeAlgorithm(chunk);
}
catch (chunkSizeE) {
ReadableStreamDefaultControllerError(controller, chunkSizeE);
throw chunkSizeE;
}
try {
EnqueueValueWithSize(controller, chunk, chunkSize);
}
catch (enqueueE) {
ReadableStreamDefaultControllerError(controller, enqueueE);
throw enqueueE;
}
}
ReadableStreamDefaultControllerCallPullIfNeeded(controller);
}
function ReadableStreamDefaultControllerError(controller, e) {
const stream = controller._controlledReadableStream;
if (stream._state !== 'readable') {
return;
}
ResetQueue(controller);
ReadableStreamDefaultControllerClearAlgorithms(controller);
ReadableStreamError(stream, e);
}
function ReadableStreamDefaultControllerGetDesiredSize(controller) {
const state = controller._controlledReadableStream._state;
if (state === 'errored') {
return null;
}
if (state === 'closed') {
return 0;
}
return controller._strategyHWM - controller._queueTotalSize;
}
// This is used in the implementation of TransformStream.
function ReadableStreamDefaultControllerHasBackpressure(controller) {
if (ReadableStreamDefaultControllerShouldCallPull(controller)) {
return false;
}
return true;
}
function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) {
const state = controller._controlledReadableStream._state;
if (!controller._closeRequested && state === 'readable') {
return true;
}
return false;
}
function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) {
assert(stream._readableStreamController === undefined);
controller._controlledReadableStream = stream;
controller._queue = undefined;
controller._queueTotalSize = undefined;
ResetQueue(controller);
controller._started = false;
controller._closeRequested = false;
controller._pullAgain = false;
controller._pulling = false;
controller._strategySizeAlgorithm = sizeAlgorithm;
controller._strategyHWM = highWaterMark;
controller._pullAlgorithm = pullAlgorithm;
controller._cancelAlgorithm = cancelAlgorithm;
stream._readableStreamController = controller;
const startResult = startAlgorithm();
uponPromise(promiseResolvedWith(startResult), () => {
controller._started = true;
assert(!controller._pulling);
assert(!controller._pullAgain);
ReadableStreamDefaultControllerCallPullIfNeeded(controller);
}, r => {
ReadableStreamDefaultControllerError(controller, r);
});
}
function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) {
const controller = Object.create(ReadableStreamDefaultController.prototype);
let startAlgorithm = () => undefined;
let pullAlgorithm = () => promiseResolvedWith(undefined);
let cancelAlgorithm = () => promiseResolvedWith(undefined);
if (underlyingSource.start !== undefined) {
startAlgorithm = () => underlyingSource.start(controller);
}
if (underlyingSource.pull !== undefined) {
pullAlgorithm = () => underlyingSource.pull(controller);
}
if (underlyingSource.cancel !== undefined) {
cancelAlgorithm = reason => underlyingSource.cancel(reason);
}
SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm);
}
// Helper functions for the ReadableStreamDefaultController.
function defaultControllerBrandCheckException$1(name) {
return new TypeError(`ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);
}
function ReadableStreamTee(stream, cloneForBranch2) {
assert(IsReadableStream(stream));
if (IsReadableByteStreamController(stream._readableStreamController)) {
return ReadableByteStreamTee(stream);
}
return ReadableStreamDefaultTee(stream);
}
function ReadableStreamDefaultTee(stream, cloneForBranch2) {
assert(IsReadableStream(stream));
const reader = AcquireReadableStreamDefaultReader(stream);
let reading = false;
let readAgain = false;
let canceled1 = false;
let canceled2 = false;
let reason1;
let reason2;
let branch1;
let branch2;
let resolveCancelPromise;
const cancelPromise = newPromise(resolve => {
resolveCancelPromise = resolve;
});
function pullAlgorithm() {
if (reading) {
readAgain = true;
return promiseResolvedWith(undefined);
}
reading = true;
const readRequest = {
_chunkSteps: chunk => {
// This needs to be delayed a microtask because it takes at least a microtask to detect errors (using
// reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let
// successful synchronously-available reads get ahead of asynchronously-available errors.
queueMicrotask(() => {
readAgain = false;
const chunk1 = chunk;
const chunk2 = chunk;
// There is no way to access the cloning code right now in the reference implementation.
// If we add one then we'll need an implementation for serializable objects.
// if (!canceled2 && cloneForBranch2) {
// chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));
// }
if (!canceled1) {
ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);
}
if (!canceled2) {
ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);
}
reading = false;
if (readAgain) {
pullAlgorithm();
}
});
},
_closeSteps: () => {
reading = false;
if (!canceled1) {
ReadableStreamDefaultControllerClose(branch1._readableStreamController);
}
if (!canceled2) {
ReadableStreamDefaultControllerClose(branch2._readableStreamController);
}
if (!canceled1 || !canceled2) {
resolveCancelPromise(undefined);
}
},
_errorSteps: () => {
reading = false;
}
};
ReadableStreamDefaultReaderRead(reader, readRequest);
return promiseResolvedWith(undefined);
}
function cancel1Algorithm(reason) {
canceled1 = true;
reason1 = reason;
if (canceled2) {
const compositeReason = CreateArrayFromList([reason1, reason2]);
const cancelResult = ReadableStreamCancel(stream, compositeReason);
resolveCancelPromise(cancelResult);
}
return cancelPromise;
}
function cancel2Algorithm(reason) {
canceled2 = true;
reason2 = reason;
if (canceled1) {
const compositeReason = CreateArrayFromList([reason1, reason2]);
const cancelResult = ReadableStreamCancel(stream, compositeReason);
resolveCancelPromise(cancelResult);
}
return cancelPromise;
}
function startAlgorithm() {
// do nothing
}
branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);
branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);
uponRejection(reader._closedPromise, (r) => {
ReadableStreamDefaultControllerError(branch1._readableStreamController, r);
ReadableStreamDefaultControllerError(branch2._readableStreamController, r);
if (!canceled1 || !canceled2) {
resolveCancelPromise(undefined);
}
});
return [branch1, branch2];
}
function ReadableByteStreamTee(stream) {
assert(IsReadableStream(stream));
assert(IsReadableByteStreamController(stream._readableStreamController));
let reader = AcquireReadableStreamDefaultReader(stream);
let reading = false;
let readAgainForBranch1 = false;
let readAgainForBranch2 = false;
let canceled1 = false;
let canceled2 = false;
let reason1;
let reason2;
let branch1;
let branch2;
let resolveCancelPromise;
const cancelPromise = newPromise(resolve => {
resolveCancelPromise = resolve;
});
function forwardReaderError(thisReader) {
uponRejection(thisReader._closedPromise, r => {
if (thisReader !== reader) {
return;
}
ReadableByteStreamControllerError(branch1._readableStreamController, r);
ReadableByteStreamControllerError(branch2._readableStreamController, r);
if (!canceled1 || !canceled2) {
resolveCancelPromise(undefined);
}
});
}
function pullWithDefaultReader() {
if (IsReadableStreamBYOBReader(reader)) {
assert(reader._readIntoRequests.length === 0);
ReadableStreamReaderGenericRelease(reader);
reader = AcquireReadableStreamDefaultReader(stream);
forwardReaderError(reader);
}
const readRequest = {
_chunkSteps: chunk => {
// This needs to be delayed a microtask because it takes at least a microtask to detect errors (using
// reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let
// successful synchronously-available reads get ahead of asynchronously-available errors.
queueMicrotask(() => {
readAgainForBranch1 = false;
readAgainForBranch2 = false;
const chunk1 = chunk;
let chunk2 = chunk;
if (!canceled1 && !canceled2) {
try {
chunk2 = CloneAsUint8Array(chunk);
}
catch (cloneE) {
ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);
ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);
resolveCancelPromise(ReadableStreamCancel(stream, cloneE));
return;
}
}
if (!canceled1) {
ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);
}
if (!canceled2) {
ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);
}
reading = false;
if (readAgainForBranch1) {
pull1Algorithm();
}
else if (readAgainForBranch2) {
pull2Algorithm();
}
});
},
_closeSteps: () => {
reading = false;
if (!canceled1) {
ReadableByteStreamControllerClose(branch1._readableStreamController);
}
if (!canceled2) {
ReadableByteStreamControllerClose(branch2._readableStreamController);
}
if (branch1._readableStreamController._pendingPullIntos.length > 0) {
ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);
}
if (branch2._readableStreamController._pendingPullIntos.length > 0) {
ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);
}
if (!canceled1 || !canceled2) {
resolveCancelPromise(undefined);
}
},
_errorSteps: () => {
reading = false;
}
};
ReadableStreamDefaultReaderRead(reader, readRequest);
}
function pullWithBYOBReader(view, forBranch2) {
if (IsReadableStreamDefaultReader(reader)) {
assert(reader._readRequests.length === 0);
ReadableStreamReaderGenericRelease(reader);
reader = AcquireReadableStreamBYOBReader(stream);
forwardReaderError(reader);
}
const byobBranch = forBranch2 ? branch2 : branch1;
const otherBranch = forBranch2 ? branch1 : branch2;
const readIntoRequest = {
_chunkSteps: chunk => {
// This needs to be delayed a microtask because it takes at least a microtask to detect errors (using
// reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let
// successful synchronously-available reads get ahead of asynchronously-available errors.
queueMicrotask(() => {
readAgainForBranch1 = false;
readAgainForBranch2 = false;
const byobCanceled = forBranch2 ? canceled2 : canceled1;
const otherCanceled = forBranch2 ? canceled1 : canceled2;
if (!otherCanceled) {
let clonedChunk;
try {
clonedChunk = CloneAsUint8Array(chunk);
}
catch (cloneE) {
ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);
ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);
resolveCancelPromise(ReadableStreamCancel(stream, cloneE));
return;
}
if (!byobCanceled) {
ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);
}
ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);
}
else if (!byobCanceled) {
ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);
}
reading = false;
if (readAgainForBranch1) {
pull1Algorithm();
}
else if (readAgainForBranch2) {
pull2Algorithm();
}
});
},
_closeSteps: chunk => {
reading = false;
const byobCanceled = forBranch2 ? canceled2 : canceled1;
const otherCanceled = forBranch2 ? canceled1 : canceled2;
if (!byobCanceled) {
ReadableByteStreamControllerClose(byobBranch._readableStreamController);
}
if (!otherCanceled) {
ReadableByteStreamControllerClose(otherBranch._readableStreamController);
}
if (chunk !== undefined) {
assert(chunk.byteLength === 0);
if (!byobCanceled) {
ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);
}
if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {
ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);
}
}
if (!byobCanceled || !otherCanceled) {
resolveCancelPromise(undefined);
}
},
_errorSteps: () => {
reading = false;
}
};
ReadableStreamBYOBReaderRead(reader, view, readIntoRequest);
}
function pull1Algorithm() {
if (reading) {
readAgainForBranch1 = true;
return promiseResolvedWith(undefined);
}
reading = true;
const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);
if (byobRequest === null) {
pullWithDefaultReader();
}
else {
pullWithBYOBReader(byobRequest._view, false);
}
return promiseResolvedWith(undefined);
}
function pull2Algorithm() {
if (reading) {
readAgainForBranch2 = true;
return promiseResolvedWith(undefined);
}
reading = true;
const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);
if (byobRequest === null) {
pullWithDefaultReader();
}
else {
pullWithBYOBReader(byobRequest._view, true);
}
return promiseResolvedWith(undefined);
}
function cancel1Algorithm(reason) {
canceled1 = true;
reason1 = reason;
if (canceled2) {
const compositeReason = CreateArrayFromList([reason1, reason2]);
const cancelResult = ReadableStreamCancel(stream, compositeReason);
resolveCancelPromise(cancelResult);
}
return cancelPromise;
}
function cancel2Algorithm(reason) {
canceled2 = true;
reason2 = reason;
if (canceled1) {
const compositeReason = CreateArrayFromList([reason1, reason2]);
const cancelResult = ReadableStreamCancel(stream, compositeReason);
resolveCancelPromise(cancelResult);
}
return cancelPromise;
}
function startAlgorithm() {
return;
}
branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);
branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);
forwardReaderError(reader);
return [branch1, branch2];
}
function convertUnderlyingDefaultOrByteSource(source, context) {
assertDictionary(source, context);
const original = source;
const autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize;
const cancel = original === null || original === void 0 ? void 0 : original.cancel;
const pull = original === null || original === void 0 ? void 0 : original.pull;
const start = original === null || original === void 0 ? void 0 : original.start;
const type = original === null || original === void 0 ? void 0 : original.type;
return {
autoAllocateChunkSize: autoAllocateChunkSize === undefined ?
undefined :
convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, `${context} has member 'autoAllocateChunkSize' that`),
cancel: cancel === undefined ?
undefined :
convertUnderlyingSourceCancelCallback(cancel, original, `${context} has member 'cancel' that`),
pull: pull === undefined ?
undefined :
convertUnderlyingSourcePullCallback(pull, original, `${context} has member 'pull' that`),
start: start === undefined ?
undefined :
convertUnderlyingSourceStartCallback(start, original, `${context} has member 'start' that`),
type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)
};
}
function convertUnderlyingSourceCancelCallback(fn, original, context) {
assertFunction(fn, context);
return (reason) => promiseCall(fn, original, [reason]);
}
function convertUnderlyingSourcePullCallback(fn, original, context) {
assertFunction(fn, context);
return (controller) => promiseCall(fn, original, [controller]);
}
function convertUnderlyingSourceStartCallback(fn, original, context) {
assertFunction(fn, context);
return (controller) => reflectCall(fn, original, [controller]);
}
function convertReadableStreamType(type, context) {
type = `${type}`;
if (type !== 'bytes') {
throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);
}
return type;
}
function convertReaderOptions(options, context) {
assertDictionary(options, context);
const mode = options === null || options === void 0 ? void 0 : options.mode;
return {
mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)
};
}
function convertReadableStreamReaderMode(mode, context) {
mode = `${mode}`;
if (mode !== 'byob') {
throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);
}
return mode;
}
function convertIteratorOptions(options, context) {
assertDictionary(options, context);
const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel;
return { preventCancel: Boolean(preventCancel) };
}
function convertPipeOptions(options, context) {
assertDictionary(options, context);
const preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort;
const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel;
const preventClose = options === null || options === void 0 ? void 0 : options.preventClose;
const signal = options === null || options === void 0 ? void 0 : options.signal;
if (signal !== undefined) {
assertAbortSignal(signal, `${context} has member 'signal' that`);
}
return {
preventAbort: Boolean(preventAbort),
preventCancel: Boolean(preventCancel),
preventClose: Boolean(preventClose),
signal
};
}
function assertAbortSignal(signal, context) {
if (!isAbortSignal(signal)) {
throw new TypeError(`${context} is not an AbortSignal.`);
}
}
function convertReadableWritablePair(pair, context) {
assertDictionary(pair, context);
const readable = pair === null || pair === void 0 ? void 0 : pair.readable;
assertRequiredField(readable, 'readable', 'ReadableWritablePair');
assertReadableStream(readable, `${context} has member 'readable' that`);
const writable = pair === null || pair === void 0 ? void 0 : pair.writable;
assertRequiredField(writable, 'writable', 'ReadableWritablePair');
assertWritableStream(writable, `${context} has member 'writable' that`);
return { readable, writable };
}
/**
* A readable stream represents a source of data, from which you can read.
*
* @public
*/
class ReadableStream {
constructor(rawUnderlyingSource = {}, rawStrategy = {}) {
if (rawUnderlyingSource === undefined) {
rawUnderlyingSource = null;
}
else {
assertObject(rawUnderlyingSource, 'First parameter');
}
const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');
const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');
InitializeReadableStream(this);
if (underlyingSource.type === 'bytes') {
if (strategy.size !== undefined) {
throw new RangeError('The strategy for a byte stream cannot have a size function');
}
const highWaterMark = ExtractHighWaterMark(strategy, 0);
SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark);
}
else {
assert(underlyingSource.type === undefined);
const sizeAlgorithm = ExtractSizeAlgorithm(strategy);
const highWaterMark = ExtractHighWaterMark(strategy, 1);
SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm);
}
}
/**
* Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.
*/
get locked() {
if (!IsReadableStream(this)) {
throw streamBrandCheckException$1('locked');
}
return IsReadableStreamLocked(this);
}
/**
* Cancels the stream, signaling a loss of interest in the stream by a consumer.
*
* The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}
* method, which might or might not use it.
*/
cancel(reason = undefined) {
if (!IsReadableStream(this)) {
return promiseRejectedWith(streamBrandCheckException$1('cancel'));
}
if (IsReadableStreamLocked(this)) {
return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));
}
return ReadableStreamCancel(this, reason);
}
getReader(rawOptions = undefined) {
if (!IsReadableStream(this)) {
throw streamBrandCheckException$1('getReader');
}
const options = convertReaderOptions(rawOptions, 'First parameter');
if (options.mode === undefined) {
return AcquireReadableStreamDefaultReader(this);
}
return AcquireReadableStreamBYOBReader(this);
}
pipeThrough(rawTransform, rawOptions = {}) {
if (!IsReadableStream(this)) {
throw streamBrandCheckException$1('pipeThrough');
}
assertRequiredArgument(rawTransform, 1, 'pipeThrough');
const transform = convertReadableWritablePair(rawTransform, 'First parameter');
const options = convertPipeOptions(rawOptions, 'Second parameter');
if (IsReadableStreamLocked(this)) {
throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');
}
if (IsWritableStreamLocked(transform.writable)) {
throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');
}
const promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal);
setPromiseIsHandledToTrue(promise);
return transform.readable;
}
pipeTo(destination, rawOptions = {}) {
if (!IsReadableStream(this)) {
return promiseRejectedWith(streamBrandCheckException$1('pipeTo'));
}
if (destination === undefined) {
return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);
}
if (!IsWritableStream(destination)) {
return promiseRejectedWith(new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`));
}
let options;
try {
options = convertPipeOptions(rawOptions, 'Second parameter');
}
catch (e) {
return promiseRejectedWith(e);
}
if (IsReadableStreamLocked(this)) {
return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream'));
}
if (IsWritableStreamLocked(destination)) {
return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream'));
}
return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal);
}
/**
* Tees this readable stream, returning a two-element array containing the two resulting branches as
* new {@link ReadableStream} instances.
*
* Teeing a stream will lock it, preventing any other consumer from acquiring a reader.
* To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be
* propagated to the stream's underlying source.
*
* Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,
* this could allow interference between the two branches.
*/
tee() {
if (!IsReadableStream(this)) {
throw streamBrandCheckException$1('tee');
}
const branches = ReadableStreamTee(this);
return CreateArrayFromList(branches);
}
values(rawOptions = undefined) {
if (!IsReadableStream(this)) {
throw streamBrandCheckException$1('values');
}
const options = convertIteratorOptions(rawOptions, 'First parameter');
return AcquireReadableStreamAsyncIterator(this, options.preventCancel);
}
}
SymbolPolyfill.asyncIterator;
Object.defineProperties(ReadableStream.prototype, {
cancel: { enumerable: true },
getReader: { enumerable: true },
pipeThrough: { enumerable: true },
pipeTo: { enumerable: true },
tee: { enumerable: true },
values: { enumerable: true },
locked: { enumerable: true }
});
if (typeof SymbolPolyfill.toStringTag === 'symbol') {
Object.defineProperty(ReadableStream.prototype, SymbolPolyfill.toStringTag, {
value: 'ReadableStream',
configurable: true
});
}
if (typeof SymbolPolyfill.asyncIterator === 'symbol') {
Object.defineProperty(ReadableStream.prototype, SymbolPolyfill.asyncIterator, {
value: ReadableStream.prototype.values,
writable: true,
configurable: true
});
}
// Abstract operations for the ReadableStream.
// Throws if and only if startAlgorithm throws.
function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) {
const stream = Object.create(ReadableStream.prototype);
InitializeReadableStream(stream);
const controller = Object.create(ReadableStreamDefaultController.prototype);
SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm);
return stream;
}
// Throws if and only if startAlgorithm throws.
function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) {
const stream = Object.create(ReadableStream.prototype);
InitializeReadableStream(stream);
const controller = Object.create(ReadableByteStreamController.prototype);
SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);
return stream;
}
function InitializeReadableStream(stream) {
stream._state = 'readable';
stream._reader = undefined;
stream._storedError = undefined;
stream._disturbed = false;
}
function IsReadableStream(x) {
if (!typeIsObject(x)) {
return false;
}
if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {
return false;
}
return x instanceof ReadableStream;
}
function IsReadableStreamLocked(stream) {
assert(IsReadableStream(stream));
if (stream._reader === undefined) {
return false;
}
return true;
}
// ReadableStream API exposed for controllers.
function ReadableStreamCancel(stream, reason) {
stream._disturbed = true;
if (stream._state === 'closed') {
return promiseResolvedWith(undefined);
}
if (stream._state === 'errored') {
return promiseRejectedWith(stream._storedError);
}
ReadableStreamClose(stream);
const reader = stream._reader;
if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {
reader._readIntoRequests.forEach(readIntoRequest => {
readIntoRequest._closeSteps(undefined);
});
reader._readIntoRequests = new SimpleQueue();
}
const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);
return transformPromiseWith(sourceCancelPromise, noop);
}
function ReadableStreamClose(stream) {
assert(stream._state === 'readable');
stream._state = 'closed';
const reader = stream._reader;
if (reader === undefined) {
return;
}
defaultReaderClosedPromiseResolve(reader);
if (IsReadableStreamDefaultReader(reader)) {
reader._readRequests.forEach(readRequest => {
readRequest._closeSteps();
});
reader._readRequests = new SimpleQueue();
}
}
function ReadableStreamError(stream, e) {
assert(IsReadableStream(stream));
assert(stream._state === 'readable');
stream._state = 'errored';
stream._storedError = e;
const reader = stream._reader;
if (reader === undefined) {
return;
}
defaultReaderClosedPromiseReject(reader, e);
if (IsReadableStreamDefaultReader(reader)) {
reader._readRequests.forEach(readRequest => {
readRequest._errorSteps(e);
});
reader._readRequests = new SimpleQueue();
}
else {
assert(IsReadableStreamBYOBReader(reader));
reader._readIntoRequests.forEach(readIntoRequest => {
readIntoRequest._errorSteps(e);
});
reader._readIntoRequests = new SimpleQueue();
}
}
// Helper functions for the ReadableStream.
function streamBrandCheckException$1(name) {
return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);
}
function convertQueuingStrategyInit(init, context) {
assertDictionary(init, context);
const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark;
assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');
return {
highWaterMark: convertUnrestrictedDouble(highWaterMark)
};
}
// The size function must not have a prototype property nor be a constructor
const byteLengthSizeFunction = (chunk) => {
return chunk.byteLength;
};
try {
Object.defineProperty(byteLengthSizeFunction, 'name', {
value: 'size',
configurable: true
});
}
catch (_a) {
// This property is non-configurable in older browsers, so ignore if this throws.
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility
}
/**
* A queuing strategy that counts the number of bytes in each chunk.
*
* @public
*/
class ByteLengthQueuingStrategy {
constructor(options) {
assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');
options = convertQueuingStrategyInit(options, 'First parameter');
this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;
}
/**
* Returns the high water mark provided to the constructor.
*/
get highWaterMark() {
if (!IsByteLengthQueuingStrategy(this)) {
throw byteLengthBrandCheckException('highWaterMark');
}
return this._byteLengthQueuingStrategyHighWaterMark;
}
/**
* Measures the size of `chunk` by returning the value of its `byteLength` property.
*/
get size() {
if (!IsByteLengthQueuingStrategy(this)) {
throw byteLengthBrandCheckException('size');
}
return byteLengthSizeFunction;
}
}
Object.defineProperties(ByteLengthQueuingStrategy.prototype, {
highWaterMark: { enumerable: true },
size: { enumerable: true }
});
if (typeof SymbolPolyfill.toStringTag === 'symbol') {
Object.defineProperty(ByteLengthQueuingStrategy.prototype, SymbolPolyfill.toStringTag, {
value: 'ByteLengthQueuingStrategy',
configurable: true
});
}
// Helper functions for the ByteLengthQueuingStrategy.
function byteLengthBrandCheckException(name) {
return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);
}
function IsByteLengthQueuingStrategy(x) {
if (!typeIsObject(x)) {
return false;
}
if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {
return false;
}
return x instanceof ByteLengthQueuingStrategy;
}
// The size function must not have a prototype property nor be a constructor
const countSizeFunction = () => {
return 1;
};
try {
Object.defineProperty(countSizeFunction, 'name', {
value: 'size',
configurable: true
});
}
catch (_a) {
// This property is non-configurable in older browsers, so ignore if this throws.
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility
}
/**
* A queuing strategy that counts the number of chunks.
*
* @public
*/
class CountQueuingStrategy {
constructor(options) {
assertRequiredArgument(options, 1, 'CountQueuingStrategy');
options = convertQueuingStrategyInit(options, 'First parameter');
this._countQueuingStrategyHighWaterMark = options.highWaterMark;
}
/**
* Returns the high water mark provided to the constructor.
*/
get highWaterMark() {
if (!IsCountQueuingStrategy(this)) {
throw countBrandCheckException('highWaterMark');
}
return this._countQueuingStrategyHighWaterMark;
}
/**
* Measures the size of `chunk` by always returning 1.
* This ensures that the total queue size is a count of the number of chunks in the queue.
*/
get size() {
if (!IsCountQueuingStrategy(this)) {
throw countBrandCheckException('size');
}
return countSizeFunction;
}
}
Object.defineProperties(CountQueuingStrategy.prototype, {
highWaterMark: { enumerable: true },
size: { enumerable: true }
});
if (typeof SymbolPolyfill.toStringTag === 'symbol') {
Object.defineProperty(CountQueuingStrategy.prototype, SymbolPolyfill.toStringTag, {
value: 'CountQueuingStrategy',
configurable: true
});
}
// Helper functions for the CountQueuingStrategy.
function countBrandCheckException(name) {
return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);
}
function IsCountQueuingStrategy(x) {
if (!typeIsObject(x)) {
return false;
}
if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {
return false;
}
return x instanceof CountQueuingStrategy;
}
function convertTransformer(original, context) {
assertDictionary(original, context);
const flush = original === null || original === void 0 ? void 0 : original.flush;
const readableType = original === null || original === void 0 ? void 0 : original.readableType;
const start = original === null || original === void 0 ? void 0 : original.start;
const transform = original === null || original === void 0 ? void 0 : original.transform;
const writableType = original === null || original === void 0 ? void 0 : original.writableType;
return {
flush: flush === undefined ?
undefined :
convertTransformerFlushCallback(flush, original, `${context} has member 'flush' that`),
readableType,
start: start === undefined ?
undefined :
convertTransformerStartCallback(start, original, `${context} has member 'start' that`),
transform: transform === undefined ?
undefined :
convertTransformerTransformCallback(transform, original, `${context} has member 'transform' that`),
writableType
};
}
function convertTransformerFlushCallback(fn, original, context) {
assertFunction(fn, context);
return (controller) => promiseCall(fn, original, [controller]);
}
function convertTransformerStartCallback(fn, original, context) {
assertFunction(fn, context);
return (controller) => reflectCall(fn, original, [controller]);
}
function convertTransformerTransformCallback(fn, original, context) {
assertFunction(fn, context);
return (chunk, controller) => promiseCall(fn, original, [chunk, controller]);
}
// Class TransformStream
/**
* A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},
* known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.
* In a manner specific to the transform stream in question, writes to the writable side result in new data being
* made available for reading from the readable side.
*
* @public
*/
class TransformStream {
constructor(rawTransformer = {}, rawWritableStrategy = {}, rawReadableStrategy = {}) {
if (rawTransformer === undefined) {
rawTransformer = null;
}
const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');
const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');
const transformer = convertTransformer(rawTransformer, 'First parameter');
if (transformer.readableType !== undefined) {
throw new RangeError('Invalid readableType specified');
}
if (transformer.writableType !== undefined) {
throw new RangeError('Invalid writableType specified');
}
const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);
const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);
const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);
const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);
let startPromise_resolve;
const startPromise = newPromise(resolve => {
startPromise_resolve = resolve;
});
InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm);
SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);
if (transformer.start !== undefined) {
startPromise_resolve(transformer.start(this._transformStreamController));
}
else {
startPromise_resolve(undefined);
}
}
/**
* The readable side of the transform stream.
*/
get readable() {
if (!IsTransformStream(this)) {
throw streamBrandCheckException('readable');
}
return this._readable;
}
/**
* The writable side of the transform stream.
*/
get writable() {
if (!IsTransformStream(this)) {
throw streamBrandCheckException('writable');
}
return this._writable;
}
}
Object.defineProperties(TransformStream.prototype, {
readable: { enumerable: true },
writable: { enumerable: true }
});
if (typeof SymbolPolyfill.toStringTag === 'symbol') {
Object.defineProperty(TransformStream.prototype, SymbolPolyfill.toStringTag, {
value: 'TransformStream',
configurable: true
});
}
function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) {
function startAlgorithm() {
return startPromise;
}
function writeAlgorithm(chunk) {
return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);
}
function abortAlgorithm(reason) {
return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);
}
function closeAlgorithm() {
return TransformStreamDefaultSinkCloseAlgorithm(stream);
}
stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm);
function pullAlgorithm() {
return TransformStreamDefaultSourcePullAlgorithm(stream);
}
function cancelAlgorithm(reason) {
TransformStreamErrorWritableAndUnblockWrite(stream, reason);
return promiseResolvedWith(undefined);
}
stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm);
// The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.
stream._backpressure = undefined;
stream._backpressureChangePromise = undefined;
stream._backpressureChangePromise_resolve = undefined;
TransformStreamSetBackpressure(stream, true);
stream._transformStreamController = undefined;
}
function IsTransformStream(x) {
if (!typeIsObject(x)) {
return false;
}
if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {
return false;
}
return x instanceof TransformStream;
}
// This is a no-op if both sides are already errored.
function TransformStreamError(stream, e) {
ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);
TransformStreamErrorWritableAndUnblockWrite(stream, e);
}
function TransformStreamErrorWritableAndUnblockWrite(stream, e) {
TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);
WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);
if (stream._backpressure) {
// Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure()
// cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time
// _backpressure is set.
TransformStreamSetBackpressure(stream, false);
}
}
function TransformStreamSetBackpressure(stream, backpressure) {
// Passes also when called during construction.
assert(stream._backpressure !== backpressure);
if (stream._backpressureChangePromise !== undefined) {
stream._backpressureChangePromise_resolve();
}
stream._backpressureChangePromise = newPromise(resolve => {
stream._backpressureChangePromise_resolve = resolve;
});
stream._backpressure = backpressure;
}
// Class TransformStreamDefaultController
/**
* Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}.
*
* @public
*/
class TransformStreamDefaultController {
constructor() {
throw new TypeError('Illegal constructor');
}
/**
* Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full.
*/
get desiredSize() {
if (!IsTransformStreamDefaultController(this)) {
throw defaultControllerBrandCheckException('desiredSize');
}
const readableController = this._controlledTransformStream._readable._readableStreamController;
return ReadableStreamDefaultControllerGetDesiredSize(readableController);
}
enqueue(chunk = undefined) {
if (!IsTransformStreamDefaultController(this)) {
throw defaultControllerBrandCheckException('enqueue');
}
TransformStreamDefaultControllerEnqueue(this, chunk);
}
/**
* Errors both the readable side and the writable side of the controlled transform stream, making all future
* interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.
*/
error(reason = undefined) {
if (!IsTransformStreamDefaultController(this)) {
throw defaultControllerBrandCheckException('error');
}
TransformStreamDefaultControllerError(this, reason);
}
/**
* Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the
* transformer only needs to consume a portion of the chunks written to the writable side.
*/
terminate() {
if (!IsTransformStreamDefaultController(this)) {
throw defaultControllerBrandCheckException('terminate');
}
TransformStreamDefaultControllerTerminate(this);
}
}
Object.defineProperties(TransformStreamDefaultController.prototype, {
enqueue: { enumerable: true },
error: { enumerable: true },
terminate: { enumerable: true },
desiredSize: { enumerable: true }
});
if (typeof SymbolPolyfill.toStringTag === 'symbol') {
Object.defineProperty(TransformStreamDefaultController.prototype, SymbolPolyfill.toStringTag, {
value: 'TransformStreamDefaultController',
configurable: true
});
}
// Transform Stream Default Controller Abstract Operations
function IsTransformStreamDefaultController(x) {
if (!typeIsObject(x)) {
return false;
}
if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {
return false;
}
return x instanceof TransformStreamDefaultController;
}
function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm) {
assert(IsTransformStream(stream));
assert(stream._transformStreamController === undefined);
controller._controlledTransformStream = stream;
stream._transformStreamController = controller;
controller._transformAlgorithm = transformAlgorithm;
controller._flushAlgorithm = flushAlgorithm;
}
function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) {
const controller = Object.create(TransformStreamDefaultController.prototype);
let transformAlgorithm = (chunk) => {
try {
TransformStreamDefaultControllerEnqueue(controller, chunk);
return promiseResolvedWith(undefined);
}
catch (transformResultE) {
return promiseRejectedWith(transformResultE);
}
};
let flushAlgorithm = () => promiseResolvedWith(undefined);
if (transformer.transform !== undefined) {
transformAlgorithm = chunk => transformer.transform(chunk, controller);
}
if (transformer.flush !== undefined) {
flushAlgorithm = () => transformer.flush(controller);
}
SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm);
}
function TransformStreamDefaultControllerClearAlgorithms(controller) {
controller._transformAlgorithm = undefined;
controller._flushAlgorithm = undefined;
}
function TransformStreamDefaultControllerEnqueue(controller, chunk) {
const stream = controller._controlledTransformStream;
const readableController = stream._readable._readableStreamController;
if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {
throw new TypeError('Readable side is not in a state that permits enqueue');
}
// We throttle transform invocations based on the backpressure of the ReadableStream, but we still
// accept TransformStreamDefaultControllerEnqueue() calls.
try {
ReadableStreamDefaultControllerEnqueue(readableController, chunk);
}
catch (e) {
// This happens when readableStrategy.size() throws.
TransformStreamErrorWritableAndUnblockWrite(stream, e);
throw stream._readable._storedError;
}
const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);
if (backpressure !== stream._backpressure) {
TransformStreamSetBackpressure(stream, true);
}
}
function TransformStreamDefaultControllerError(controller, e) {
TransformStreamError(controller._controlledTransformStream, e);
}
function TransformStreamDefaultControllerPerformTransform(controller, chunk) {
const transformPromise = controller._transformAlgorithm(chunk);
return transformPromiseWith(transformPromise, undefined, r => {
TransformStreamError(controller._controlledTransformStream, r);
throw r;
});
}
function TransformStreamDefaultControllerTerminate(controller) {
const stream = controller._controlledTransformStream;
const readableController = stream._readable._readableStreamController;
ReadableStreamDefaultControllerClose(readableController);
const error = new TypeError('TransformStream terminated');
TransformStreamErrorWritableAndUnblockWrite(stream, error);
}
// TransformStreamDefaultSink Algorithms
function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) {
assert(stream._writable._state === 'writable');
const controller = stream._transformStreamController;
if (stream._backpressure) {
const backpressureChangePromise = stream._backpressureChangePromise;
return transformPromiseWith(backpressureChangePromise, () => {
const writable = stream._writable;
const state = writable._state;
if (state === 'erroring') {
throw writable._storedError;
}
return TransformStreamDefaultControllerPerformTransform(controller, chunk);
});
}
return TransformStreamDefaultControllerPerformTransform(controller, chunk);
}
function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) {
// abort() is not called synchronously, so it is possible for abort() to be called when the stream is already
// errored.
TransformStreamError(stream, reason);
return promiseResolvedWith(undefined);
}
function TransformStreamDefaultSinkCloseAlgorithm(stream) {
// stream._readable cannot change after construction, so caching it across a call to user code is safe.
const readable = stream._readable;
const controller = stream._transformStreamController;
const flushPromise = controller._flushAlgorithm();
TransformStreamDefaultControllerClearAlgorithms(controller);
// Return a promise that is fulfilled with undefined on success.
return transformPromiseWith(flushPromise, () => {
if (readable._state === 'errored') {
throw readable._storedError;
}
ReadableStreamDefaultControllerClose(readable._readableStreamController);
}, r => {
TransformStreamError(stream, r);
throw readable._storedError;
});
}
// TransformStreamDefaultSource Algorithms
function TransformStreamDefaultSourcePullAlgorithm(stream) {
// Invariant. Enforced by the promises returned by start() and pull().
assert(stream._backpressure);
assert(stream._backpressureChangePromise !== undefined);
TransformStreamSetBackpressure(stream, false);
// Prevent the next pull() call until there is backpressure.
return stream._backpressureChangePromise;
}
// Helper functions for the TransformStreamDefaultController.
function defaultControllerBrandCheckException(name) {
return new TypeError(`TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);
}
// Helper functions for the TransformStream.
function streamBrandCheckException(name) {
return new TypeError(`TransformStream.prototype.${name} can only be used on a TransformStream`);
}
exports.ByteLengthQueuingStrategy = ByteLengthQueuingStrategy;
exports.CountQueuingStrategy = CountQueuingStrategy;
exports.ReadableByteStreamController = ReadableByteStreamController;
exports.ReadableStream = ReadableStream;
exports.ReadableStreamBYOBReader = ReadableStreamBYOBReader;
exports.ReadableStreamBYOBRequest = ReadableStreamBYOBRequest;
exports.ReadableStreamDefaultController = ReadableStreamDefaultController;
exports.ReadableStreamDefaultReader = ReadableStreamDefaultReader;
exports.TransformStream = TransformStream;
exports.TransformStreamDefaultController = TransformStreamDefaultController;
exports.WritableStream = WritableStream;
exports.WritableStreamDefaultController = WritableStreamDefaultController;
exports.WritableStreamDefaultWriter = WritableStreamDefaultWriter;
}));
} (ponyfill_es2018, ponyfill_es2018.exports));
return ponyfill_es2018.exports;
}
/* c8 ignore start */
// 64 KiB (same size chrome slice theirs blob into Uint8array's)
const POOL_SIZE$1 = 65536;
if (!globalThis.ReadableStream) {
// `stream/web` got introduced in v16.5.0 as experimental
// and it's preferred over the polyfilled version. So we also
// suppress the warning that gets emitted by NodeJS for using it.
try {
const process = require('process');
const { emitWarning } = process;
try {
process.emitWarning = () => {};
Object.assign(globalThis, require('stream/web'));
process.emitWarning = emitWarning;
} catch (error) {
process.emitWarning = emitWarning;
throw error
}
} catch (error) {
// fallback to polyfill implementation
Object.assign(globalThis, requirePonyfill_es2018());
}
}
try {
// Don't use prefix for this, require+node: is not supported until node v14.14
// Only `import()` can use prefix in 12.20 and later
const { Blob } = require('buffer');
if (Blob && !Blob.prototype.stream) {
Blob.prototype.stream = function name (params) {
let position = 0;
const blob = this;
return new ReadableStream({
type: 'bytes',
async pull (ctrl) {
const chunk = blob.slice(position, Math.min(blob.size, position + POOL_SIZE$1));
const buffer = await chunk.arrayBuffer();
position += buffer.byteLength;
ctrl.enqueue(new Uint8Array(buffer));
if (position === blob.size) {
ctrl.close();
}
}
})
};
}
} catch (error) {}
/*! fetch-blob. MIT License. Jimmy Wärting <https://jimmy.warting.se/opensource> */
// 64 KiB (same size chrome slice theirs blob into Uint8array's)
const POOL_SIZE = 65536;
/** @param {(Blob | Uint8Array)[]} parts */
async function * toIterator (parts, clone = true) {
for (const part of parts) {
if ('stream' in part) {
yield * (/** @type {AsyncIterableIterator<Uint8Array>} */ (part.stream()));
} else if (ArrayBuffer.isView(part)) {
if (clone) {
let position = part.byteOffset;
const end = part.byteOffset + part.byteLength;
while (position !== end) {
const size = Math.min(end - position, POOL_SIZE);
const chunk = part.buffer.slice(position, position + size);
position += chunk.byteLength;
yield new Uint8Array(chunk);
}
} else {
yield part;
}
/* c8 ignore next 10 */
} else {
// For blobs that have arrayBuffer but no stream method (nodes buffer.Blob)
let position = 0, b = (/** @type {Blob} */ (part));
while (position !== b.size) {
const chunk = b.slice(position, Math.min(b.size, position + POOL_SIZE));
const buffer = await chunk.arrayBuffer();
position += buffer.byteLength;
yield new Uint8Array(buffer);
}
}
}
}
const _Blob = class Blob {
/** @type {Array.<(Blob|Uint8Array)>} */
#parts = []
#type = ''
#size = 0
#endings = 'transparent'
/**
* The Blob() constructor returns a new Blob object. The content
* of the blob consists of the concatenation of the values given
* in the parameter array.
*
* @param {*} blobParts
* @param {{ type?: string, endings?: string }} [options]
*/
constructor (blobParts = [], options = {}) {
if (typeof blobParts !== 'object' || blobParts === null) {
throw new TypeError('Failed to construct \'Blob\': The provided value cannot be converted to a sequence.')
}
if (typeof blobParts[Symbol.iterator] !== 'function') {
throw new TypeError('Failed to construct \'Blob\': The object must have a callable @@iterator property.')
}
if (typeof options !== 'object' && typeof options !== 'function') {
throw new TypeError('Failed to construct \'Blob\': parameter 2 cannot convert to dictionary.')
}
if (options === null) options = {};
const encoder = new TextEncoder();
for (const element of blobParts) {
let part;
if (ArrayBuffer.isView(element)) {
part = new Uint8Array(element.buffer.slice(element.byteOffset, element.byteOffset + element.byteLength));
} else if (element instanceof ArrayBuffer) {
part = new Uint8Array(element.slice(0));
} else if (element instanceof Blob) {
part = element;
} else {
part = encoder.encode(`${element}`);
}
const size = ArrayBuffer.isView(part) ? part.byteLength : part.size;
// Avoid pushing empty parts into the array to better GC them
if (size) {
this.#size += size;
this.#parts.push(part);
}
}
this.#endings = `${options.endings === undefined ? 'transparent' : options.endings}`;
const type = options.type === undefined ? '' : String(options.type);
this.#type = /^[\x20-\x7E]*$/.test(type) ? type : '';
}
/**
* The Blob interface's size property returns the
* size of the Blob in bytes.
*/
get size () {
return this.#size
}
/**
* The type property of a Blob object returns the MIME type of the file.
*/
get type () {
return this.#type
}
/**
* The text() method in the Blob interface returns a Promise
* that resolves with a string containing the contents of
* the blob, interpreted as UTF-8.
*
* @return {Promise<string>}
*/
async text () {
// More optimized than using this.arrayBuffer()
// that requires twice as much ram
const decoder = new TextDecoder();
let str = '';
for await (const part of toIterator(this.#parts, false)) {
str += decoder.decode(part, { stream: true });
}
// Remaining
str += decoder.decode();
return str
}
/**
* The arrayBuffer() method in the Blob interface returns a
* Promise that resolves with the contents of the blob as
* binary data contained in an ArrayBuffer.
*
* @return {Promise<ArrayBuffer>}
*/
async arrayBuffer () {
// Easier way... Just a unnecessary overhead
// const view = new Uint8Array(this.size);
// await this.stream().getReader({mode: 'byob'}).read(view);
// return view.buffer;
const data = new Uint8Array(this.size);
let offset = 0;
for await (const chunk of toIterator(this.#parts, false)) {
data.set(chunk, offset);
offset += chunk.length;
}
return data.buffer
}
stream () {
const it = toIterator(this.#parts, true);
return new globalThis.ReadableStream({
// @ts-ignore
type: 'bytes',
async pull (ctrl) {
const chunk = await it.next();
chunk.done ? ctrl.close() : ctrl.enqueue(chunk.value);
},
async cancel () {
await it.return();
}
})
}
/**
* The Blob interface's slice() method creates and returns a
* new Blob object which contains data from a subset of the
* blob on which it's called.
*
* @param {number} [start]
* @param {number} [end]
* @param {string} [type]
*/
slice (start = 0, end = this.size, type = '') {
const { size } = this;
let relativeStart = start < 0 ? Math.max(size + start, 0) : Math.min(start, size);
let relativeEnd = end < 0 ? Math.max(size + end, 0) : Math.min(end, size);
const span = Math.max(relativeEnd - relativeStart, 0);
const parts = this.#parts;
const blobParts = [];
let added = 0;
for (const part of parts) {
// don't add the overflow to new blobParts
if (added >= span) {
break
}
const size = ArrayBuffer.isView(part) ? part.byteLength : part.size;
if (relativeStart && size <= relativeStart) {
// Skip the beginning and change the relative
// start & end position as we skip the unwanted parts
relativeStart -= size;
relativeEnd -= size;
} else {
let chunk;
if (ArrayBuffer.isView(part)) {
chunk = part.subarray(relativeStart, Math.min(size, relativeEnd));
added += chunk.byteLength;
} else {
chunk = part.slice(relativeStart, Math.min(size, relativeEnd));
added += chunk.size;
}
relativeEnd -= size;
blobParts.push(chunk);
relativeStart = 0; // All next sequential parts should start at 0
}
}
const blob = new Blob([], { type: String(type).toLowerCase() });
blob.#size = span;
blob.#parts = blobParts;
return blob
}
get [Symbol.toStringTag] () {
return 'Blob'
}
static [Symbol.hasInstance] (object) {
return (
object &&
typeof object === 'object' &&
typeof object.constructor === 'function' &&
(
typeof object.stream === 'function' ||
typeof object.arrayBuffer === 'function'
) &&
/^(Blob|File)$/.test(object[Symbol.toStringTag])
)
}
};
Object.defineProperties(_Blob.prototype, {
size: { enumerable: true },
type: { enumerable: true },
slice: { enumerable: true }
});
/** @type {typeof globalThis.Blob} */
const Blob = _Blob;
const _File = class File extends Blob {
#lastModified = 0
#name = ''
/**
* @param {*[]} fileBits
* @param {string} fileName
* @param {{lastModified?: number, type?: string}} options
*/// @ts-ignore
constructor (fileBits, fileName, options = {}) {
if (arguments.length < 2) {
throw new TypeError(`Failed to construct 'File': 2 arguments required, but only ${arguments.length} present.`)
}
super(fileBits, options);
if (options === null) options = {};
// Simulate WebIDL type casting for NaN value in lastModified option.
const lastModified = options.lastModified === undefined ? Date.now() : Number(options.lastModified);
if (!Number.isNaN(lastModified)) {
this.#lastModified = lastModified;
}
this.#name = String(fileName);
}
get name () {
return this.#name
}
get lastModified () {
return this.#lastModified
}
get [Symbol.toStringTag] () {
return 'File'
}
static [Symbol.hasInstance] (object) {
return !!object && object instanceof Blob &&
/^(File)$/.test(object[Symbol.toStringTag])
}
};
/** @type {typeof globalThis.File} */// @ts-ignore
const File = _File;
/*! formdata-polyfill. MIT License. Jimmy Wärting <https://jimmy.warting.se/opensource> */
var {toStringTag:t,iterator:i,hasInstance:h}=Symbol,
r=Math.random,
m='append,set,get,getAll,delete,keys,values,entries,forEach,constructor'.split(','),
f=(a,b,c)=>(a+='',/^(Blob|File)$/.test(b && b[t])?[(c=c!==void 0?c+'':b[t]=='File'?b.name:'blob',a),b.name!==c||b[t]=='blob'?new File([b],c,b):b]:[a,b+'']),
e=(c,f)=>(f?c:c.replace(/\r?\n|\r/g,'\r\n')).replace(/\n/g,'%0A').replace(/\r/g,'%0D').replace(/"/g,'%22'),
x=(n, a, e)=>{if(a.length<e){throw new TypeError(`Failed to execute '${n}' on 'FormData': ${e} arguments required, but only ${a.length} present.`)}};
/** @type {typeof globalThis.FormData} */
const FormData = class FormData {
#d=[];
constructor(...a){if(a.length)throw new TypeError(`Failed to construct 'FormData': parameter 1 is not of type 'HTMLFormElement'.`)}
get [t]() {return 'FormData'}
[i](){return this.entries()}
static [h](o) {return o&&typeof o==='object'&&o[t]==='FormData'&&!m.some(m=>typeof o[m]!='function')}
append(...a){x('append',arguments,2);this.#d.push(f(...a));}
delete(a){x('delete',arguments,1);a+='';this.#d=this.#d.filter(([b])=>b!==a);}
get(a){x('get',arguments,1);a+='';for(var b=this.#d,l=b.length,c=0;c<l;c++)if(b[c][0]===a)return b[c][1];return null}
getAll(a,b){x('getAll',arguments,1);b=[];a+='';this.#d.forEach(c=>c[0]===a&&b.push(c[1]));return b}
has(a){x('has',arguments,1);a+='';return this.#d.some(b=>b[0]===a)}
forEach(a,b){x('forEach',arguments,1);for(var [c,d]of this)a.call(b,d,c,this);}
set(...a){x('set',arguments,2);var b=[],c=!0;a=f(...a);this.#d.forEach(d=>{d[0]===a[0]?c&&(c=!b.push(a)):b.push(d);});c&&b.push(a);this.#d=b;}
*entries(){yield*this.#d;}
*keys(){for(var[a]of this)yield a;}
*values(){for(var[,a]of this)yield a;}};
/** @param {FormData} F */
function formDataToBlob (F,B=Blob){
var b=`${r()}${r()}`.replace(/\./g, '').slice(-28).padStart(32, '-'),c=[],p=`--${b}\r\nContent-Disposition: form-data; name="`;
F.forEach((v,n)=>typeof v=='string'
?c.push(p+e(n)+`"\r\n\r\n${v.replace(/\r(?!\n)|(?<!\r)\n/g, '\r\n')}\r\n`)
:c.push(p+e(n)+`"; filename="${e(v.name, 1)}"\r\nContent-Type: ${v.type||"application/octet-stream"}\r\n\r\n`, v, '\r\n'));
c.push(`--${b}--`);
return new B(c,{type:"multipart/form-data; boundary="+b})}
class FetchBaseError extends Error {
constructor(message, type) {
super(message);
// Hide custom error implementation details from end-users
Error.captureStackTrace(this, this.constructor);
this.type = type;
}
get name() {
return this.constructor.name;
}
get [Symbol.toStringTag]() {
return this.constructor.name;
}
}
/**
* @typedef {{ address?: string, code: string, dest?: string, errno: number, info?: object, message: string, path?: string, port?: number, syscall: string}} SystemError
*/
/**
* FetchError interface for operational errors
*/
class FetchError extends FetchBaseError {
/**
* @param {string} message - Error message for human
* @param {string} [type] - Error type for machine
* @param {SystemError} [systemError] - For Node.js system error
*/
constructor(message, type, systemError) {
super(message, type);
// When err.type is `system`, err.erroredSysCall contains system error and err.code contains system error code
if (systemError) {
// eslint-disable-next-line no-multi-assign
this.code = this.errno = systemError.code;
this.erroredSysCall = systemError.syscall;
}
}
}
/**
* Is.js
*
* Object type checks.
*/
const NAME = Symbol.toStringTag;
/**
* Check if `obj` is a URLSearchParams object
* ref: https://github.com/node-fetch/node-fetch/issues/296#issuecomment-307598143
* @param {*} object - Object to check for
* @return {boolean}
*/
const isURLSearchParameters = object => {
return (
typeof object === 'object' &&
typeof object.append === 'function' &&
typeof object.delete === 'function' &&
typeof object.get === 'function' &&
typeof object.getAll === 'function' &&
typeof object.has === 'function' &&
typeof object.set === 'function' &&
typeof object.sort === 'function' &&
object[NAME] === 'URLSearchParams'
);
};
/**
* Check if `object` is a W3C `Blob` object (which `File` inherits from)
* @param {*} object - Object to check for
* @return {boolean}
*/
const isBlob = object => {
return (
object &&
typeof object === 'object' &&
typeof object.arrayBuffer === 'function' &&
typeof object.type === 'string' &&
typeof object.stream === 'function' &&
typeof object.constructor === 'function' &&
/^(Blob|File)$/.test(object[NAME])
);
};
/**
* Check if `obj` is an instance of AbortSignal.
* @param {*} object - Object to check for
* @return {boolean}
*/
const isAbortSignal = object => {
return (
typeof object === 'object' && (
object[NAME] === 'AbortSignal' ||
object[NAME] === 'EventTarget'
)
);
};
/**
* isDomainOrSubdomain reports whether sub is a subdomain (or exact match) of
* the parent domain.
*
* Both domains must already be in canonical form.
* @param {string|URL} original
* @param {string|URL} destination
*/
const isDomainOrSubdomain = (destination, original) => {
const orig = new URL(original).hostname;
const dest = new URL(destination).hostname;
return orig === dest || orig.endsWith(`.${dest}`);
};
/**
* isSameProtocol reports whether the two provided URLs use the same protocol.
*
* Both domains must already be in canonical form.
* @param {string|URL} original
* @param {string|URL} destination
*/
const isSameProtocol = (destination, original) => {
const orig = new URL(original).protocol;
const dest = new URL(destination).protocol;
return orig === dest;
};
const pipeline = node_util.promisify(Stream__default.default.pipeline);
const INTERNALS$2 = Symbol('Body internals');
/**
* Body mixin
*
* Ref: https://fetch.spec.whatwg.org/#body
*
* @param Stream body Readable stream
* @param Object opts Response options
* @return Void
*/
class Body {
constructor(body, {
size = 0
} = {}) {
let boundary = null;
if (body === null) {
// Body is undefined or null
body = null;
} else if (isURLSearchParameters(body)) {
// Body is a URLSearchParams
body = node_buffer.Buffer.from(body.toString());
} else if (isBlob(body)) ; else if (node_buffer.Buffer.isBuffer(body)) ; else if (node_util.types.isAnyArrayBuffer(body)) {
// Body is ArrayBuffer
body = node_buffer.Buffer.from(body);
} else if (ArrayBuffer.isView(body)) {
// Body is ArrayBufferView
body = node_buffer.Buffer.from(body.buffer, body.byteOffset, body.byteLength);
} else if (body instanceof Stream__default.default) ; else if (body instanceof FormData) {
// Body is FormData
body = formDataToBlob(body);
boundary = body.type.split('=')[1];
} else {
// None of the above
// coerce to string then buffer
body = node_buffer.Buffer.from(String(body));
}
let stream = body;
if (node_buffer.Buffer.isBuffer(body)) {
stream = Stream__default.default.Readable.from(body);
} else if (isBlob(body)) {
stream = Stream__default.default.Readable.from(body.stream());
}
this[INTERNALS$2] = {
body,
stream,
boundary,
disturbed: false,
error: null
};
this.size = size;
if (body instanceof Stream__default.default) {
body.on('error', error_ => {
const error = error_ instanceof FetchBaseError ?
error_ :
new FetchError(`Invalid response body while trying to fetch ${this.url}: ${error_.message}`, 'system', error_);
this[INTERNALS$2].error = error;
});
}
}
get body() {
return this[INTERNALS$2].stream;
}
get bodyUsed() {
return this[INTERNALS$2].disturbed;
}
/**
* Decode response as ArrayBuffer
*
* @return Promise
*/
async arrayBuffer() {
const {buffer, byteOffset, byteLength} = await consumeBody(this);
return buffer.slice(byteOffset, byteOffset + byteLength);
}
async formData() {
const ct = this.headers.get('content-type');
if (ct.startsWith('application/x-www-form-urlencoded')) {
const formData = new FormData();
const parameters = new URLSearchParams(await this.text());
for (const [name, value] of parameters) {
formData.append(name, value);
}
return formData;
}
const {toFormData} = await Promise.resolve().then(function () { return require('./multipart-parser-61109072.cjs'); });
return toFormData(this.body, ct);
}
/**
* Return raw response as Blob
*
* @return Promise
*/
async blob() {
const ct = (this.headers && this.headers.get('content-type')) || (this[INTERNALS$2].body && this[INTERNALS$2].body.type) || '';
const buf = await this.arrayBuffer();
return new Blob([buf], {
type: ct
});
}
/**
* Decode response as json
*
* @return Promise
*/
async json() {
const text = await this.text();
return JSON.parse(text);
}
/**
* Decode response as text
*
* @return Promise
*/
async text() {
const buffer = await consumeBody(this);
return new TextDecoder().decode(buffer);
}
/**
* Decode response as buffer (non-spec api)
*
* @return Promise
*/
buffer() {
return consumeBody(this);
}
}
Body.prototype.buffer = node_util.deprecate(Body.prototype.buffer, 'Please use \'response.arrayBuffer()\' instead of \'response.buffer()\'', 'node-fetch#buffer');
// In browsers, all properties are enumerable.
Object.defineProperties(Body.prototype, {
body: {enumerable: true},
bodyUsed: {enumerable: true},
arrayBuffer: {enumerable: true},
blob: {enumerable: true},
json: {enumerable: true},
text: {enumerable: true},
data: {get: node_util.deprecate(() => {},
'data doesn\'t exist, use json(), text(), arrayBuffer(), or body instead',
'https://github.com/node-fetch/node-fetch/issues/1000 (response)')}
});
/**
* Consume and convert an entire Body to a Buffer.
*
* Ref: https://fetch.spec.whatwg.org/#concept-body-consume-body
*
* @return Promise
*/
async function consumeBody(data) {
if (data[INTERNALS$2].disturbed) {
throw new TypeError(`body used already for: ${data.url}`);
}
data[INTERNALS$2].disturbed = true;
if (data[INTERNALS$2].error) {
throw data[INTERNALS$2].error;
}
const {body} = data;
// Body is null
if (body === null) {
return node_buffer.Buffer.alloc(0);
}
/* c8 ignore next 3 */
if (!(body instanceof Stream__default.default)) {
return node_buffer.Buffer.alloc(0);
}
// Body is stream
// get ready to actually consume the body
const accum = [];
let accumBytes = 0;
try {
for await (const chunk of body) {
if (data.size > 0 && accumBytes + chunk.length > data.size) {
const error = new FetchError(`content size at ${data.url} over limit: ${data.size}`, 'max-size');
body.destroy(error);
throw error;
}
accumBytes += chunk.length;
accum.push(chunk);
}
} catch (error) {
const error_ = error instanceof FetchBaseError ? error : new FetchError(`Invalid response body while trying to fetch ${data.url}: ${error.message}`, 'system', error);
throw error_;
}
if (body.readableEnded === true || body._readableState.ended === true) {
try {
if (accum.every(c => typeof c === 'string')) {
return node_buffer.Buffer.from(accum.join(''));
}
return node_buffer.Buffer.concat(accum, accumBytes);
} catch (error) {
throw new FetchError(`Could not create Buffer from response body for ${data.url}: ${error.message}`, 'system', error);
}
} else {
throw new FetchError(`Premature close of server response while trying to fetch ${data.url}`);
}
}
/**
* Clone body given Res/Req instance
*
* @param Mixed instance Response or Request instance
* @param String highWaterMark highWaterMark for both PassThrough body streams
* @return Mixed
*/
const clone = (instance, highWaterMark) => {
let p1;
let p2;
let {body} = instance[INTERNALS$2];
// Don't allow cloning a used body
if (instance.bodyUsed) {
throw new Error('cannot clone body after it is used');
}
// Check that body is a stream and not form-data object
// note: we can't clone the form-data object without having it as a dependency
if ((body instanceof Stream__default.default) && (typeof body.getBoundary !== 'function')) {
// Tee instance body
p1 = new Stream.PassThrough({highWaterMark});
p2 = new Stream.PassThrough({highWaterMark});
body.pipe(p1);
body.pipe(p2);
// Set instance body to teed body and return the other teed body
instance[INTERNALS$2].stream = p1;
body = p2;
}
return body;
};
const getNonSpecFormDataBoundary = node_util.deprecate(
body => body.getBoundary(),
'form-data doesn\'t follow the spec and requires special treatment. Use alternative package',
'https://github.com/node-fetch/node-fetch/issues/1167'
);
/**
* Performs the operation "extract a `Content-Type` value from |object|" as
* specified in the specification:
* https://fetch.spec.whatwg.org/#concept-bodyinit-extract
*
* This function assumes that instance.body is present.
*
* @param {any} body Any options.body input
* @returns {string | null}
*/
const extractContentType = (body, request) => {
// Body is null or undefined
if (body === null) {
return null;
}
// Body is string
if (typeof body === 'string') {
return 'text/plain;charset=UTF-8';
}
// Body is a URLSearchParams
if (isURLSearchParameters(body)) {
return 'application/x-www-form-urlencoded;charset=UTF-8';
}
// Body is blob
if (isBlob(body)) {
return body.type || null;
}
// Body is a Buffer (Buffer, ArrayBuffer or ArrayBufferView)
if (node_buffer.Buffer.isBuffer(body) || node_util.types.isAnyArrayBuffer(body) || ArrayBuffer.isView(body)) {
return null;
}
if (body instanceof FormData) {
return `multipart/form-data; boundary=${request[INTERNALS$2].boundary}`;
}
// Detect form data input from form-data module
if (body && typeof body.getBoundary === 'function') {
return `multipart/form-data;boundary=${getNonSpecFormDataBoundary(body)}`;
}
// Body is stream - can't really do much about this
if (body instanceof Stream__default.default) {
return null;
}
// Body constructor defaults other things to string
return 'text/plain;charset=UTF-8';
};
/**
* The Fetch Standard treats this as if "total bytes" is a property on the body.
* For us, we have to explicitly get it with a function.
*
* ref: https://fetch.spec.whatwg.org/#concept-body-total-bytes
*
* @param {any} obj.body Body object from the Body instance.
* @returns {number | null}
*/
const getTotalBytes = request => {
const {body} = request[INTERNALS$2];
// Body is null or undefined
if (body === null) {
return 0;
}
// Body is Blob
if (isBlob(body)) {
return body.size;
}
// Body is Buffer
if (node_buffer.Buffer.isBuffer(body)) {
return body.length;
}
// Detect form data input from form-data module
if (body && typeof body.getLengthSync === 'function') {
return body.hasKnownLength && body.hasKnownLength() ? body.getLengthSync() : null;
}
// Body is stream
return null;
};
/**
* Write a Body to a Node.js WritableStream (e.g. http.Request) object.
*
* @param {Stream.Writable} dest The stream to write to.
* @param obj.body Body object from the Body instance.
* @returns {Promise<void>}
*/
const writeToStream = async (dest, {body}) => {
if (body === null) {
// Body is null
dest.end();
} else {
// Body is stream
await pipeline(body, dest);
}
};
/**
* Headers.js
*
* Headers class offers convenient helpers
*/
/* c8 ignore next 9 */
const validateHeaderName = typeof http__default.default.validateHeaderName === 'function' ?
http__default.default.validateHeaderName :
name => {
if (!/^[\^`\-\w!#$%&'*+.|~]+$/.test(name)) {
const error = new TypeError(`Header name must be a valid HTTP token [${name}]`);
Object.defineProperty(error, 'code', {value: 'ERR_INVALID_HTTP_TOKEN'});
throw error;
}
};
/* c8 ignore next 9 */
const validateHeaderValue = typeof http__default.default.validateHeaderValue === 'function' ?
http__default.default.validateHeaderValue :
(name, value) => {
if (/[^\t\u0020-\u007E\u0080-\u00FF]/.test(value)) {
const error = new TypeError(`Invalid character in header content ["${name}"]`);
Object.defineProperty(error, 'code', {value: 'ERR_INVALID_CHAR'});
throw error;
}
};
/**
* @typedef {Headers | Record<string, string> | Iterable<readonly [string, string]> | Iterable<Iterable<string>>} HeadersInit
*/
/**
* This Fetch API interface allows you to perform various actions on HTTP request and response headers.
* These actions include retrieving, setting, adding to, and removing.
* A Headers object has an associated header list, which is initially empty and consists of zero or more name and value pairs.
* You can add to this using methods like append() (see Examples.)
* In all methods of this interface, header names are matched by case-insensitive byte sequence.
*
*/
class Headers extends URLSearchParams {
/**
* Headers class
*
* @constructor
* @param {HeadersInit} [init] - Response headers
*/
constructor(init) {
// Validate and normalize init object in [name, value(s)][]
/** @type {string[][]} */
let result = [];
if (init instanceof Headers) {
const raw = init.raw();
for (const [name, values] of Object.entries(raw)) {
result.push(...values.map(value => [name, value]));
}
} else if (init == null) ; else if (typeof init === 'object' && !node_util.types.isBoxedPrimitive(init)) {
const method = init[Symbol.iterator];
// eslint-disable-next-line no-eq-null, eqeqeq
if (method == null) {
// Record<ByteString, ByteString>
result.push(...Object.entries(init));
} else {
if (typeof method !== 'function') {
throw new TypeError('Header pairs must be iterable');
}
// Sequence<sequence<ByteString>>
// Note: per spec we have to first exhaust the lists then process them
result = [...init]
.map(pair => {
if (
typeof pair !== 'object' || node_util.types.isBoxedPrimitive(pair)
) {
throw new TypeError('Each header pair must be an iterable object');
}
return [...pair];
}).map(pair => {
if (pair.length !== 2) {
throw new TypeError('Each header pair must be a name/value tuple');
}
return [...pair];
});
}
} else {
throw new TypeError('Failed to construct \'Headers\': The provided value is not of type \'(sequence<sequence<ByteString>> or record<ByteString, ByteString>)');
}
// Validate and lowercase
result =
result.length > 0 ?
result.map(([name, value]) => {
validateHeaderName(name);
validateHeaderValue(name, String(value));
return [String(name).toLowerCase(), String(value)];
}) :
undefined;
super(result);
// Returning a Proxy that will lowercase key names, validate parameters and sort keys
// eslint-disable-next-line no-constructor-return
return new Proxy(this, {
get(target, p, receiver) {
switch (p) {
case 'append':
case 'set':
return (name, value) => {
validateHeaderName(name);
validateHeaderValue(name, String(value));
return URLSearchParams.prototype[p].call(
target,
String(name).toLowerCase(),
String(value)
);
};
case 'delete':
case 'has':
case 'getAll':
return name => {
validateHeaderName(name);
return URLSearchParams.prototype[p].call(
target,
String(name).toLowerCase()
);
};
case 'keys':
return () => {
target.sort();
return new Set(URLSearchParams.prototype.keys.call(target)).keys();
};
default:
return Reflect.get(target, p, receiver);
}
}
});
/* c8 ignore next */
}
get [Symbol.toStringTag]() {
return this.constructor.name;
}
toString() {
return Object.prototype.toString.call(this);
}
get(name) {
const values = this.getAll(name);
if (values.length === 0) {
return null;
}
let value = values.join(', ');
if (/^content-encoding$/i.test(name)) {
value = value.toLowerCase();
}
return value;
}
forEach(callback, thisArg = undefined) {
for (const name of this.keys()) {
Reflect.apply(callback, thisArg, [this.get(name), name, this]);
}
}
* values() {
for (const name of this.keys()) {
yield this.get(name);
}
}
/**
* @type {() => IterableIterator<[string, string]>}
*/
* entries() {
for (const name of this.keys()) {
yield [name, this.get(name)];
}
}
[Symbol.iterator]() {
return this.entries();
}
/**
* Node-fetch non-spec method
* returning all headers and their values as array
* @returns {Record<string, string[]>}
*/
raw() {
return [...this.keys()].reduce((result, key) => {
result[key] = this.getAll(key);
return result;
}, {});
}
/**
* For better console.log(headers) and also to convert Headers into Node.js Request compatible format
*/
[Symbol.for('nodejs.util.inspect.custom')]() {
return [...this.keys()].reduce((result, key) => {
const values = this.getAll(key);
// Http.request() only supports string as Host header.
// This hack makes specifying custom Host header possible.
if (key === 'host') {
result[key] = values[0];
} else {
result[key] = values.length > 1 ? values : values[0];
}
return result;
}, {});
}
}
/**
* Re-shaping object for Web IDL tests
* Only need to do it for overridden methods
*/
Object.defineProperties(
Headers.prototype,
['get', 'entries', 'forEach', 'values'].reduce((result, property) => {
result[property] = {enumerable: true};
return result;
}, {})
);
/**
* Create a Headers object from an http.IncomingMessage.rawHeaders, ignoring those that do
* not conform to HTTP grammar productions.
* @param {import('http').IncomingMessage['rawHeaders']} headers
*/
function fromRawHeaders(headers = []) {
return new Headers(
headers
// Split into pairs
.reduce((result, value, index, array) => {
if (index % 2 === 0) {
result.push(array.slice(index, index + 2));
}
return result;
}, [])
.filter(([name, value]) => {
try {
validateHeaderName(name);
validateHeaderValue(name, String(value));
return true;
} catch {
return false;
}
})
);
}
const redirectStatus = new Set([301, 302, 303, 307, 308]);
/**
* Redirect code matching
*
* @param {number} code - Status code
* @return {boolean}
*/
const isRedirect = code => {
return redirectStatus.has(code);
};
/**
* Response.js
*
* Response class provides content decoding
*/
const INTERNALS$1 = Symbol('Response internals');
/**
* Response class
*
* Ref: https://fetch.spec.whatwg.org/#response-class
*
* @param Stream body Readable stream
* @param Object opts Response options
* @return Void
*/
class Response extends Body {
constructor(body = null, options = {}) {
super(body, options);
// eslint-disable-next-line no-eq-null, eqeqeq, no-negated-condition
const status = options.status != null ? options.status : 200;
const headers = new Headers(options.headers);
if (body !== null && !headers.has('Content-Type')) {
const contentType = extractContentType(body, this);
if (contentType) {
headers.append('Content-Type', contentType);
}
}
this[INTERNALS$1] = {
type: 'default',
url: options.url,
status,
statusText: options.statusText || '',
headers,
counter: options.counter,
highWaterMark: options.highWaterMark
};
}
get type() {
return this[INTERNALS$1].type;
}
get url() {
return this[INTERNALS$1].url || '';
}
get status() {
return this[INTERNALS$1].status;
}
/**
* Convenience property representing if the request ended normally
*/
get ok() {
return this[INTERNALS$1].status >= 200 && this[INTERNALS$1].status < 300;
}
get redirected() {
return this[INTERNALS$1].counter > 0;
}
get statusText() {
return this[INTERNALS$1].statusText;
}
get headers() {
return this[INTERNALS$1].headers;
}
get highWaterMark() {
return this[INTERNALS$1].highWaterMark;
}
/**
* Clone this response
*
* @return Response
*/
clone() {
return new Response(clone(this, this.highWaterMark), {
type: this.type,
url: this.url,
status: this.status,
statusText: this.statusText,
headers: this.headers,
ok: this.ok,
redirected: this.redirected,
size: this.size,
highWaterMark: this.highWaterMark
});
}
/**
* @param {string} url The URL that the new response is to originate from.
* @param {number} status An optional status code for the response (e.g., 302.)
* @returns {Response} A Response object.
*/
static redirect(url, status = 302) {
if (!isRedirect(status)) {
throw new RangeError('Failed to execute "redirect" on "response": Invalid status code');
}
return new Response(null, {
headers: {
location: new URL(url).toString()
},
status
});
}
static error() {
const response = new Response(null, {status: 0, statusText: ''});
response[INTERNALS$1].type = 'error';
return response;
}
static json(data = undefined, init = {}) {
const body = JSON.stringify(data);
if (body === undefined) {
throw new TypeError('data is not JSON serializable');
}
const headers = new Headers(init && init.headers);
if (!headers.has('content-type')) {
headers.set('content-type', 'application/json');
}
return new Response(body, {
...init,
headers
});
}
get [Symbol.toStringTag]() {
return 'Response';
}
}
Object.defineProperties(Response.prototype, {
type: {enumerable: true},
url: {enumerable: true},
status: {enumerable: true},
ok: {enumerable: true},
redirected: {enumerable: true},
statusText: {enumerable: true},
headers: {enumerable: true},
clone: {enumerable: true}
});
const getSearch = parsedURL => {
if (parsedURL.search) {
return parsedURL.search;
}
const lastOffset = parsedURL.href.length - 1;
const hash = parsedURL.hash || (parsedURL.href[lastOffset] === '#' ? '#' : '');
return parsedURL.href[lastOffset - hash.length] === '?' ? '?' : '';
};
/**
* @external URL
* @see {@link https://developer.mozilla.org/en-US/docs/Web/API/URL|URL}
*/
/**
* @module utils/referrer
* @private
*/
/**
* @see {@link https://w3c.github.io/webappsec-referrer-policy/#strip-url|Referrer Policy §8.4. Strip url for use as a referrer}
* @param {string} URL
* @param {boolean} [originOnly=false]
*/
function stripURLForUseAsAReferrer(url, originOnly = false) {
// 1. If url is null, return no referrer.
if (url == null) { // eslint-disable-line no-eq-null, eqeqeq
return 'no-referrer';
}
url = new URL(url);
// 2. If url's scheme is a local scheme, then return no referrer.
if (/^(about|blob|data):$/.test(url.protocol)) {
return 'no-referrer';
}
// 3. Set url's username to the empty string.
url.username = '';
// 4. Set url's password to null.
// Note: `null` appears to be a mistake as this actually results in the password being `"null"`.
url.password = '';
// 5. Set url's fragment to null.
// Note: `null` appears to be a mistake as this actually results in the fragment being `"#null"`.
url.hash = '';
// 6. If the origin-only flag is true, then:
if (originOnly) {
// 6.1. Set url's path to null.
// Note: `null` appears to be a mistake as this actually results in the path being `"/null"`.
url.pathname = '';
// 6.2. Set url's query to null.
// Note: `null` appears to be a mistake as this actually results in the query being `"?null"`.
url.search = '';
}
// 7. Return url.
return url;
}
/**
* @see {@link https://w3c.github.io/webappsec-referrer-policy/#enumdef-referrerpolicy|enum ReferrerPolicy}
*/
const ReferrerPolicy = new Set([
'',
'no-referrer',
'no-referrer-when-downgrade',
'same-origin',
'origin',
'strict-origin',
'origin-when-cross-origin',
'strict-origin-when-cross-origin',
'unsafe-url'
]);
/**
* @see {@link https://w3c.github.io/webappsec-referrer-policy/#default-referrer-policy|default referrer policy}
*/
const DEFAULT_REFERRER_POLICY = 'strict-origin-when-cross-origin';
/**
* @see {@link https://w3c.github.io/webappsec-referrer-policy/#referrer-policies|Referrer Policy §3. Referrer Policies}
* @param {string} referrerPolicy
* @returns {string} referrerPolicy
*/
function validateReferrerPolicy(referrerPolicy) {
if (!ReferrerPolicy.has(referrerPolicy)) {
throw new TypeError(`Invalid referrerPolicy: ${referrerPolicy}`);
}
return referrerPolicy;
}
/**
* @see {@link https://w3c.github.io/webappsec-secure-contexts/#is-origin-trustworthy|Referrer Policy §3.2. Is origin potentially trustworthy?}
* @param {external:URL} url
* @returns `true`: "Potentially Trustworthy", `false`: "Not Trustworthy"
*/
function isOriginPotentiallyTrustworthy(url) {
// 1. If origin is an opaque origin, return "Not Trustworthy".
// Not applicable
// 2. Assert: origin is a tuple origin.
// Not for implementations
// 3. If origin's scheme is either "https" or "wss", return "Potentially Trustworthy".
if (/^(http|ws)s:$/.test(url.protocol)) {
return true;
}
// 4. If origin's host component matches one of the CIDR notations 127.0.0.0/8 or ::1/128 [RFC4632], return "Potentially Trustworthy".
const hostIp = url.host.replace(/(^\[)|(]$)/g, '');
const hostIPVersion = node_net.isIP(hostIp);
if (hostIPVersion === 4 && /^127\./.test(hostIp)) {
return true;
}
if (hostIPVersion === 6 && /^(((0+:){7})|(::(0+:){0,6}))0*1$/.test(hostIp)) {
return true;
}
// 5. If origin's host component is "localhost" or falls within ".localhost", and the user agent conforms to the name resolution rules in [let-localhost-be-localhost], return "Potentially Trustworthy".
// We are returning FALSE here because we cannot ensure conformance to
// let-localhost-be-loalhost (https://tools.ietf.org/html/draft-west-let-localhost-be-localhost)
if (url.host === 'localhost' || url.host.endsWith('.localhost')) {
return false;
}
// 6. If origin's scheme component is file, return "Potentially Trustworthy".
if (url.protocol === 'file:') {
return true;
}
// 7. If origin's scheme component is one which the user agent considers to be authenticated, return "Potentially Trustworthy".
// Not supported
// 8. If origin has been configured as a trustworthy origin, return "Potentially Trustworthy".
// Not supported
// 9. Return "Not Trustworthy".
return false;
}
/**
* @see {@link https://w3c.github.io/webappsec-secure-contexts/#is-url-trustworthy|Referrer Policy §3.3. Is url potentially trustworthy?}
* @param {external:URL} url
* @returns `true`: "Potentially Trustworthy", `false`: "Not Trustworthy"
*/
function isUrlPotentiallyTrustworthy(url) {
// 1. If url is "about:blank" or "about:srcdoc", return "Potentially Trustworthy".
if (/^about:(blank|srcdoc)$/.test(url)) {
return true;
}
// 2. If url's scheme is "data", return "Potentially Trustworthy".
if (url.protocol === 'data:') {
return true;
}
// Note: The origin of blob: and filesystem: URLs is the origin of the context in which they were
// created. Therefore, blobs created in a trustworthy origin will themselves be potentially
// trustworthy.
if (/^(blob|filesystem):$/.test(url.protocol)) {
return true;
}
// 3. Return the result of executing §3.2 Is origin potentially trustworthy? on url's origin.
return isOriginPotentiallyTrustworthy(url);
}
/**
* Modifies the referrerURL to enforce any extra security policy considerations.
* @see {@link https://w3c.github.io/webappsec-referrer-policy/#determine-requests-referrer|Referrer Policy §8.3. Determine request's Referrer}, step 7
* @callback module:utils/referrer~referrerURLCallback
* @param {external:URL} referrerURL
* @returns {external:URL} modified referrerURL
*/
/**
* Modifies the referrerOrigin to enforce any extra security policy considerations.
* @see {@link https://w3c.github.io/webappsec-referrer-policy/#determine-requests-referrer|Referrer Policy §8.3. Determine request's Referrer}, step 7
* @callback module:utils/referrer~referrerOriginCallback
* @param {external:URL} referrerOrigin
* @returns {external:URL} modified referrerOrigin
*/
/**
* @see {@link https://w3c.github.io/webappsec-referrer-policy/#determine-requests-referrer|Referrer Policy §8.3. Determine request's Referrer}
* @param {Request} request
* @param {object} o
* @param {module:utils/referrer~referrerURLCallback} o.referrerURLCallback
* @param {module:utils/referrer~referrerOriginCallback} o.referrerOriginCallback
* @returns {external:URL} Request's referrer
*/
function determineRequestsReferrer(request, {referrerURLCallback, referrerOriginCallback} = {}) {
// There are 2 notes in the specification about invalid pre-conditions. We return null, here, for
// these cases:
// > Note: If request's referrer is "no-referrer", Fetch will not call into this algorithm.
// > Note: If request's referrer policy is the empty string, Fetch will not call into this
// > algorithm.
if (request.referrer === 'no-referrer' || request.referrerPolicy === '') {
return null;
}
// 1. Let policy be request's associated referrer policy.
const policy = request.referrerPolicy;
// 2. Let environment be request's client.
// not applicable to node.js
// 3. Switch on request's referrer:
if (request.referrer === 'about:client') {
return 'no-referrer';
}
// "a URL": Let referrerSource be request's referrer.
const referrerSource = request.referrer;
// 4. Let request's referrerURL be the result of stripping referrerSource for use as a referrer.
let referrerURL = stripURLForUseAsAReferrer(referrerSource);
// 5. Let referrerOrigin be the result of stripping referrerSource for use as a referrer, with the
// origin-only flag set to true.
let referrerOrigin = stripURLForUseAsAReferrer(referrerSource, true);
// 6. If the result of serializing referrerURL is a string whose length is greater than 4096, set
// referrerURL to referrerOrigin.
if (referrerURL.toString().length > 4096) {
referrerURL = referrerOrigin;
}
// 7. The user agent MAY alter referrerURL or referrerOrigin at this point to enforce arbitrary
// policy considerations in the interests of minimizing data leakage. For example, the user
// agent could strip the URL down to an origin, modify its host, replace it with an empty
// string, etc.
if (referrerURLCallback) {
referrerURL = referrerURLCallback(referrerURL);
}
if (referrerOriginCallback) {
referrerOrigin = referrerOriginCallback(referrerOrigin);
}
// 8.Execute the statements corresponding to the value of policy:
const currentURL = new URL(request.url);
switch (policy) {
case 'no-referrer':
return 'no-referrer';
case 'origin':
return referrerOrigin;
case 'unsafe-url':
return referrerURL;
case 'strict-origin':
// 1. If referrerURL is a potentially trustworthy URL and request's current URL is not a
// potentially trustworthy URL, then return no referrer.
if (isUrlPotentiallyTrustworthy(referrerURL) && !isUrlPotentiallyTrustworthy(currentURL)) {
return 'no-referrer';
}
// 2. Return referrerOrigin.
return referrerOrigin.toString();
case 'strict-origin-when-cross-origin':
// 1. If the origin of referrerURL and the origin of request's current URL are the same, then
// return referrerURL.
if (referrerURL.origin === currentURL.origin) {
return referrerURL;
}
// 2. If referrerURL is a potentially trustworthy URL and request's current URL is not a
// potentially trustworthy URL, then return no referrer.
if (isUrlPotentiallyTrustworthy(referrerURL) && !isUrlPotentiallyTrustworthy(currentURL)) {
return 'no-referrer';
}
// 3. Return referrerOrigin.
return referrerOrigin;
case 'same-origin':
// 1. If the origin of referrerURL and the origin of request's current URL are the same, then
// return referrerURL.
if (referrerURL.origin === currentURL.origin) {
return referrerURL;
}
// 2. Return no referrer.
return 'no-referrer';
case 'origin-when-cross-origin':
// 1. If the origin of referrerURL and the origin of request's current URL are the same, then
// return referrerURL.
if (referrerURL.origin === currentURL.origin) {
return referrerURL;
}
// Return referrerOrigin.
return referrerOrigin;
case 'no-referrer-when-downgrade':
// 1. If referrerURL is a potentially trustworthy URL and request's current URL is not a
// potentially trustworthy URL, then return no referrer.
if (isUrlPotentiallyTrustworthy(referrerURL) && !isUrlPotentiallyTrustworthy(currentURL)) {
return 'no-referrer';
}
// 2. Return referrerURL.
return referrerURL;
default:
throw new TypeError(`Invalid referrerPolicy: ${policy}`);
}
}
/**
* @see {@link https://w3c.github.io/webappsec-referrer-policy/#parse-referrer-policy-from-header|Referrer Policy §8.1. Parse a referrer policy from a Referrer-Policy header}
* @param {Headers} headers Response headers
* @returns {string} policy
*/
function parseReferrerPolicyFromHeader(headers) {
// 1. Let policy-tokens be the result of extracting header list values given `Referrer-Policy`
// and response’s header list.
const policyTokens = (headers.get('referrer-policy') || '').split(/[,\s]+/);
// 2. Let policy be the empty string.
let policy = '';
// 3. For each token in policy-tokens, if token is a referrer policy and token is not the empty
// string, then set policy to token.
// Note: This algorithm loops over multiple policy values to allow deployment of new policy
// values with fallbacks for older user agents, as described in § 11.1 Unknown Policy Values.
for (const token of policyTokens) {
if (token && ReferrerPolicy.has(token)) {
policy = token;
}
}
// 4. Return policy.
return policy;
}
/**
* Request.js
*
* Request class contains server only options
*
* All spec algorithm step numbers are based on https://fetch.spec.whatwg.org/commit-snapshots/ae716822cb3a61843226cd090eefc6589446c1d2/.
*/
const INTERNALS = Symbol('Request internals');
/**
* Check if `obj` is an instance of Request.
*
* @param {*} object
* @return {boolean}
*/
const isRequest = object => {
return (
typeof object === 'object' &&
typeof object[INTERNALS] === 'object'
);
};
const doBadDataWarn = node_util.deprecate(() => {},
'.data is not a valid RequestInit property, use .body instead',
'https://github.com/node-fetch/node-fetch/issues/1000 (request)');
/**
* Request class
*
* Ref: https://fetch.spec.whatwg.org/#request-class
*
* @param Mixed input Url or Request instance
* @param Object init Custom options
* @return Void
*/
class Request extends Body {
constructor(input, init = {}) {
let parsedURL;
// Normalize input and force URL to be encoded as UTF-8 (https://github.com/node-fetch/node-fetch/issues/245)
if (isRequest(input)) {
parsedURL = new URL(input.url);
} else {
parsedURL = new URL(input);
input = {};
}
if (parsedURL.username !== '' || parsedURL.password !== '') {
throw new TypeError(`${parsedURL} is an url with embedded credentials.`);
}
let method = init.method || input.method || 'GET';
if (/^(delete|get|head|options|post|put)$/i.test(method)) {
method = method.toUpperCase();
}
if (!isRequest(init) && 'data' in init) {
doBadDataWarn();
}
// eslint-disable-next-line no-eq-null, eqeqeq
if ((init.body != null || (isRequest(input) && input.body !== null)) &&
(method === 'GET' || method === 'HEAD')) {
throw new TypeError('Request with GET/HEAD method cannot have body');
}
const inputBody = init.body ?
init.body :
(isRequest(input) && input.body !== null ?
clone(input) :
null);
super(inputBody, {
size: init.size || input.size || 0
});
const headers = new Headers(init.headers || input.headers || {});
if (inputBody !== null && !headers.has('Content-Type')) {
const contentType = extractContentType(inputBody, this);
if (contentType) {
headers.set('Content-Type', contentType);
}
}
let signal = isRequest(input) ?
input.signal :
null;
if ('signal' in init) {
signal = init.signal;
}
// eslint-disable-next-line no-eq-null, eqeqeq
if (signal != null && !isAbortSignal(signal)) {
throw new TypeError('Expected signal to be an instanceof AbortSignal or EventTarget');
}
// §5.4, Request constructor steps, step 15.1
// eslint-disable-next-line no-eq-null, eqeqeq
let referrer = init.referrer == null ? input.referrer : init.referrer;
if (referrer === '') {
// §5.4, Request constructor steps, step 15.2
referrer = 'no-referrer';
} else if (referrer) {
// §5.4, Request constructor steps, step 15.3.1, 15.3.2
const parsedReferrer = new URL(referrer);
// §5.4, Request constructor steps, step 15.3.3, 15.3.4
referrer = /^about:(\/\/)?client$/.test(parsedReferrer) ? 'client' : parsedReferrer;
} else {
referrer = undefined;
}
this[INTERNALS] = {
method,
redirect: init.redirect || input.redirect || 'follow',
headers,
parsedURL,
signal,
referrer
};
// Node-fetch-only options
this.follow = init.follow === undefined ? (input.follow === undefined ? 20 : input.follow) : init.follow;
this.compress = init.compress === undefined ? (input.compress === undefined ? true : input.compress) : init.compress;
this.counter = init.counter || input.counter || 0;
this.agent = init.agent || input.agent;
this.highWaterMark = init.highWaterMark || input.highWaterMark || 16384;
this.insecureHTTPParser = init.insecureHTTPParser || input.insecureHTTPParser || false;
// §5.4, Request constructor steps, step 16.
// Default is empty string per https://fetch.spec.whatwg.org/#concept-request-referrer-policy
this.referrerPolicy = init.referrerPolicy || input.referrerPolicy || '';
}
/** @returns {string} */
get method() {
return this[INTERNALS].method;
}
/** @returns {string} */
get url() {
return node_url.format(this[INTERNALS].parsedURL);
}
/** @returns {Headers} */
get headers() {
return this[INTERNALS].headers;
}
get redirect() {
return this[INTERNALS].redirect;
}
/** @returns {AbortSignal} */
get signal() {
return this[INTERNALS].signal;
}
// https://fetch.spec.whatwg.org/#dom-request-referrer
get referrer() {
if (this[INTERNALS].referrer === 'no-referrer') {
return '';
}
if (this[INTERNALS].referrer === 'client') {
return 'about:client';
}
if (this[INTERNALS].referrer) {
return this[INTERNALS].referrer.toString();
}
return undefined;
}
get referrerPolicy() {
return this[INTERNALS].referrerPolicy;
}
set referrerPolicy(referrerPolicy) {
this[INTERNALS].referrerPolicy = validateReferrerPolicy(referrerPolicy);
}
/**
* Clone this request
*
* @return Request
*/
clone() {
return new Request(this);
}
get [Symbol.toStringTag]() {
return 'Request';
}
}
Object.defineProperties(Request.prototype, {
method: {enumerable: true},
url: {enumerable: true},
headers: {enumerable: true},
redirect: {enumerable: true},
clone: {enumerable: true},
signal: {enumerable: true},
referrer: {enumerable: true},
referrerPolicy: {enumerable: true}
});
/**
* Convert a Request to Node.js http request options.
*
* @param {Request} request - A Request instance
* @return The options object to be passed to http.request
*/
const getNodeRequestOptions = request => {
const {parsedURL} = request[INTERNALS];
const headers = new Headers(request[INTERNALS].headers);
// Fetch step 1.3
if (!headers.has('Accept')) {
headers.set('Accept', '*/*');
}
// HTTP-network-or-cache fetch steps 2.4-2.7
let contentLengthValue = null;
if (request.body === null && /^(post|put)$/i.test(request.method)) {
contentLengthValue = '0';
}
if (request.body !== null) {
const totalBytes = getTotalBytes(request);
// Set Content-Length if totalBytes is a number (that is not NaN)
if (typeof totalBytes === 'number' && !Number.isNaN(totalBytes)) {
contentLengthValue = String(totalBytes);
}
}
if (contentLengthValue) {
headers.set('Content-Length', contentLengthValue);
}
// 4.1. Main fetch, step 2.6
// > If request's referrer policy is the empty string, then set request's referrer policy to the
// > default referrer policy.
if (request.referrerPolicy === '') {
request.referrerPolicy = DEFAULT_REFERRER_POLICY;
}
// 4.1. Main fetch, step 2.7
// > If request's referrer is not "no-referrer", set request's referrer to the result of invoking
// > determine request's referrer.
if (request.referrer && request.referrer !== 'no-referrer') {
request[INTERNALS].referrer = determineRequestsReferrer(request);
} else {
request[INTERNALS].referrer = 'no-referrer';
}
// 4.5. HTTP-network-or-cache fetch, step 6.9
// > If httpRequest's referrer is a URL, then append `Referer`/httpRequest's referrer, serialized
// > and isomorphic encoded, to httpRequest's header list.
if (request[INTERNALS].referrer instanceof URL) {
headers.set('Referer', request.referrer);
}
// HTTP-network-or-cache fetch step 2.11
if (!headers.has('User-Agent')) {
headers.set('User-Agent', 'node-fetch');
}
// HTTP-network-or-cache fetch step 2.15
if (request.compress && !headers.has('Accept-Encoding')) {
headers.set('Accept-Encoding', 'gzip, deflate, br');
}
let {agent} = request;
if (typeof agent === 'function') {
agent = agent(parsedURL);
}
if (!headers.has('Connection') && !agent) {
headers.set('Connection', 'close');
}
// HTTP-network fetch step 4.2
// chunked encoding is handled by Node.js
const search = getSearch(parsedURL);
// Pass the full URL directly to request(), but overwrite the following
// options:
const options = {
// Overwrite search to retain trailing ? (issue #776)
path: parsedURL.pathname + search,
// The following options are not expressed in the URL
method: request.method,
headers: headers[Symbol.for('nodejs.util.inspect.custom')](),
insecureHTTPParser: request.insecureHTTPParser,
agent
};
return {
/** @type {URL} */
parsedURL,
options
};
};
/**
* AbortError interface for cancelled requests
*/
class AbortError extends FetchBaseError {
constructor(message, type = 'aborted') {
super(message, type);
}
}
/*! node-domexception. MIT License. Jimmy Wärting <https://jimmy.warting.se/opensource> */
if (!globalThis.DOMException) {
try {
const { MessageChannel } = require('worker_threads'),
port = new MessageChannel().port1,
ab = new ArrayBuffer();
port.postMessage(ab, [ab, ab]);
} catch (err) {
err.constructor.name === 'DOMException' && (
globalThis.DOMException = err.constructor
);
}
}
var nodeDomexception = globalThis.DOMException;
const { stat, mkdtemp } = node_fs.promises;
/**
* @param {string} path filepath on the disk
* @param {string} [type] mimetype to use
*/
const blobFromSync = (path, type) => fromBlob(node_fs.statSync(path), path, type);
/**
* @param {string} path filepath on the disk
* @param {string} [type] mimetype to use
* @returns {Promise<Blob>}
*/
const blobFrom = (path, type) => stat(path).then(stat => fromBlob(stat, path, type));
/**
* @param {string} path filepath on the disk
* @param {string} [type] mimetype to use
* @returns {Promise<File>}
*/
const fileFrom = (path, type) => stat(path).then(stat => fromFile(stat, path, type));
/**
* @param {string} path filepath on the disk
* @param {string} [type] mimetype to use
*/
const fileFromSync = (path, type) => fromFile(node_fs.statSync(path), path, type);
// @ts-ignore
const fromBlob = (stat, path, type = '') => new Blob([new BlobDataItem({
path,
size: stat.size,
lastModified: stat.mtimeMs,
start: 0
})], { type });
// @ts-ignore
const fromFile = (stat, path, type = '') => new File([new BlobDataItem({
path,
size: stat.size,
lastModified: stat.mtimeMs,
start: 0
})], node_path.basename(path), { type, lastModified: stat.mtimeMs });
/**
* This is a blob backed up by a file on the disk
* with minium requirement. Its wrapped around a Blob as a blobPart
* so you have no direct access to this.
*
* @private
*/
class BlobDataItem {
#path
#start
constructor (options) {
this.#path = options.path;
this.#start = options.start;
this.size = options.size;
this.lastModified = options.lastModified;
this.originalSize = options.originalSize === undefined
? options.size
: options.originalSize;
}
/**
* Slicing arguments is first validated and formatted
* to not be out of range by Blob.prototype.slice
*/
slice (start, end) {
return new BlobDataItem({
path: this.#path,
lastModified: this.lastModified,
originalSize: this.originalSize,
size: end - start,
start: this.#start + start
})
}
async * stream () {
const { mtimeMs, size } = await stat(this.#path);
if (mtimeMs > this.lastModified || this.originalSize !== size) {
throw new nodeDomexception('The requested file could not be read, typically due to permission problems that have occurred after a reference to a file was acquired.', 'NotReadableError')
}
yield * node_fs.createReadStream(this.#path, {
start: this.#start,
end: this.#start + this.size - 1
});
}
get [Symbol.toStringTag] () {
return 'Blob'
}
}
process__default.default.once('exit', () => {
});
/**
* Index.js
*
* a request API compatible with window.fetch
*
* All spec algorithm step numbers are based on https://fetch.spec.whatwg.org/commit-snapshots/ae716822cb3a61843226cd090eefc6589446c1d2/.
*/
const supportedSchemas = new Set(['data:', 'http:', 'https:']);
/**
* Fetch function
*
* @param {string | URL | import('./request').default} url - Absolute url or Request instance
* @param {*} [options_] - Fetch options
* @return {Promise<import('./response').default>}
*/
async function fetch(url, options_) {
return new Promise((resolve, reject) => {
// Build request object
const request = new Request(url, options_);
const {parsedURL, options} = getNodeRequestOptions(request);
if (!supportedSchemas.has(parsedURL.protocol)) {
throw new TypeError(`node-fetch cannot load ${url}. URL scheme "${parsedURL.protocol.replace(/:$/, '')}" is not supported.`);
}
if (parsedURL.protocol === 'data:') {
const data = dataUriToBuffer(request.url);
const response = new Response(data, {headers: {'Content-Type': data.typeFull}});
resolve(response);
return;
}
// Wrap http.request into fetch
const send = (parsedURL.protocol === 'https:' ? https__default.default : http__default.default).request;
const {signal} = request;
let response = null;
const abort = () => {
const error = new AbortError('The operation was aborted.');
reject(error);
if (request.body && request.body instanceof Stream__default.default.Readable) {
request.body.destroy(error);
}
if (!response || !response.body) {
return;
}
response.body.emit('error', error);
};
if (signal && signal.aborted) {
abort();
return;
}
const abortAndFinalize = () => {
abort();
finalize();
};
// Send request
const request_ = send(parsedURL.toString(), options);
if (signal) {
signal.addEventListener('abort', abortAndFinalize);
}
const finalize = () => {
request_.abort();
if (signal) {
signal.removeEventListener('abort', abortAndFinalize);
}
};
request_.on('error', error => {
reject(new FetchError(`request to ${request.url} failed, reason: ${error.message}`, 'system', error));
finalize();
});
fixResponseChunkedTransferBadEnding(request_, error => {
if (response && response.body) {
response.body.destroy(error);
}
});
/* c8 ignore next 18 */
if (process.version < 'v14') {
// Before Node.js 14, pipeline() does not fully support async iterators and does not always
// properly handle when the socket close/end events are out of order.
request_.on('socket', s => {
let endedWithEventsCount;
s.prependListener('end', () => {
endedWithEventsCount = s._eventsCount;
});
s.prependListener('close', hadError => {
// if end happened before close but the socket didn't emit an error, do it now
if (response && endedWithEventsCount < s._eventsCount && !hadError) {
const error = new Error('Premature close');
error.code = 'ERR_STREAM_PREMATURE_CLOSE';
response.body.emit('error', error);
}
});
});
}
request_.on('response', response_ => {
request_.setTimeout(0);
const headers = fromRawHeaders(response_.rawHeaders);
// HTTP fetch step 5
if (isRedirect(response_.statusCode)) {
// HTTP fetch step 5.2
const location = headers.get('Location');
// HTTP fetch step 5.3
let locationURL = null;
try {
locationURL = location === null ? null : new URL(location, request.url);
} catch {
// error here can only be invalid URL in Location: header
// do not throw when options.redirect == manual
// let the user extract the errorneous redirect URL
if (request.redirect !== 'manual') {
reject(new FetchError(`uri requested responds with an invalid redirect URL: ${location}`, 'invalid-redirect'));
finalize();
return;
}
}
// HTTP fetch step 5.5
switch (request.redirect) {
case 'error':
reject(new FetchError(`uri requested responds with a redirect, redirect mode is set to error: ${request.url}`, 'no-redirect'));
finalize();
return;
case 'manual':
// Nothing to do
break;
case 'follow': {
// HTTP-redirect fetch step 2
if (locationURL === null) {
break;
}
// HTTP-redirect fetch step 5
if (request.counter >= request.follow) {
reject(new FetchError(`maximum redirect reached at: ${request.url}`, 'max-redirect'));
finalize();
return;
}
// HTTP-redirect fetch step 6 (counter increment)
// Create a new Request object.
const requestOptions = {
headers: new Headers(request.headers),
follow: request.follow,
counter: request.counter + 1,
agent: request.agent,
compress: request.compress,
method: request.method,
body: clone(request),
signal: request.signal,
size: request.size,
referrer: request.referrer,
referrerPolicy: request.referrerPolicy
};
// when forwarding sensitive headers like "Authorization",
// "WWW-Authenticate", and "Cookie" to untrusted targets,
// headers will be ignored when following a redirect to a domain
// that is not a subdomain match or exact match of the initial domain.
// For example, a redirect from "foo.com" to either "foo.com" or "sub.foo.com"
// will forward the sensitive headers, but a redirect to "bar.com" will not.
// headers will also be ignored when following a redirect to a domain using
// a different protocol. For example, a redirect from "https://foo.com" to "http://foo.com"
// will not forward the sensitive headers
if (!isDomainOrSubdomain(request.url, locationURL) || !isSameProtocol(request.url, locationURL)) {
for (const name of ['authorization', 'www-authenticate', 'cookie', 'cookie2']) {
requestOptions.headers.delete(name);
}
}
// HTTP-redirect fetch step 9
if (response_.statusCode !== 303 && request.body && options_.body instanceof Stream__default.default.Readable) {
reject(new FetchError('Cannot follow redirect with body being a readable stream', 'unsupported-redirect'));
finalize();
return;
}
// HTTP-redirect fetch step 11
if (response_.statusCode === 303 || ((response_.statusCode === 301 || response_.statusCode === 302) && request.method === 'POST')) {
requestOptions.method = 'GET';
requestOptions.body = undefined;
requestOptions.headers.delete('content-length');
}
// HTTP-redirect fetch step 14
const responseReferrerPolicy = parseReferrerPolicyFromHeader(headers);
if (responseReferrerPolicy) {
requestOptions.referrerPolicy = responseReferrerPolicy;
}
// HTTP-redirect fetch step 15
resolve(fetch(new Request(locationURL, requestOptions)));
finalize();
return;
}
default:
return reject(new TypeError(`Redirect option '${request.redirect}' is not a valid value of RequestRedirect`));
}
}
// Prepare response
if (signal) {
response_.once('end', () => {
signal.removeEventListener('abort', abortAndFinalize);
});
}
let body = Stream.pipeline(response_, new Stream.PassThrough(), error => {
if (error) {
reject(error);
}
});
// see https://github.com/nodejs/node/pull/29376
/* c8 ignore next 3 */
if (process.version < 'v12.10') {
response_.on('aborted', abortAndFinalize);
}
const responseOptions = {
url: request.url,
status: response_.statusCode,
statusText: response_.statusMessage,
headers,
size: request.size,
counter: request.counter,
highWaterMark: request.highWaterMark
};
// HTTP-network fetch step 12.1.1.3
const codings = headers.get('Content-Encoding');
// HTTP-network fetch step 12.1.1.4: handle content codings
// in following scenarios we ignore compression support
// 1. compression support is disabled
// 2. HEAD request
// 3. no Content-Encoding header
// 4. no content response (204)
// 5. content not modified response (304)
if (!request.compress || request.method === 'HEAD' || codings === null || response_.statusCode === 204 || response_.statusCode === 304) {
response = new Response(body, responseOptions);
resolve(response);
return;
}
// For Node v6+
// Be less strict when decoding compressed responses, since sometimes
// servers send slightly invalid responses that are still accepted
// by common browsers.
// Always using Z_SYNC_FLUSH is what cURL does.
const zlibOptions = {
flush: zlib__default.default.Z_SYNC_FLUSH,
finishFlush: zlib__default.default.Z_SYNC_FLUSH
};
// For gzip
if (codings === 'gzip' || codings === 'x-gzip') {
body = Stream.pipeline(body, zlib__default.default.createGunzip(zlibOptions), error => {
if (error) {
reject(error);
}
});
response = new Response(body, responseOptions);
resolve(response);
return;
}
// For deflate
if (codings === 'deflate' || codings === 'x-deflate') {
// Handle the infamous raw deflate response from old servers
// a hack for old IIS and Apache servers
const raw = Stream.pipeline(response_, new Stream.PassThrough(), error => {
if (error) {
reject(error);
}
});
raw.once('data', chunk => {
// See http://stackoverflow.com/questions/37519828
if ((chunk[0] & 0x0F) === 0x08) {
body = Stream.pipeline(body, zlib__default.default.createInflate(), error => {
if (error) {
reject(error);
}
});
} else {
body = Stream.pipeline(body, zlib__default.default.createInflateRaw(), error => {
if (error) {
reject(error);
}
});
}
response = new Response(body, responseOptions);
resolve(response);
});
raw.once('end', () => {
// Some old IIS servers return zero-length OK deflate responses, so
// 'data' is never emitted. See https://github.com/node-fetch/node-fetch/pull/903
if (!response) {
response = new Response(body, responseOptions);
resolve(response);
}
});
return;
}
// For br
if (codings === 'br') {
body = Stream.pipeline(body, zlib__default.default.createBrotliDecompress(), error => {
if (error) {
reject(error);
}
});
response = new Response(body, responseOptions);
resolve(response);
return;
}
// Otherwise, use response as-is
response = new Response(body, responseOptions);
resolve(response);
});
// eslint-disable-next-line promise/prefer-await-to-then
writeToStream(request_, request).catch(reject);
});
}
function fixResponseChunkedTransferBadEnding(request, errorCallback) {
const LAST_CHUNK = node_buffer.Buffer.from('0\r\n\r\n');
let isChunkedTransfer = false;
let properLastChunkReceived = false;
let previousChunk;
request.on('response', response => {
const {headers} = response;
isChunkedTransfer = headers['transfer-encoding'] === 'chunked' && !headers['content-length'];
});
request.on('socket', socket => {
const onSocketClose = () => {
if (isChunkedTransfer && !properLastChunkReceived) {
const error = new Error('Premature close');
error.code = 'ERR_STREAM_PREMATURE_CLOSE';
errorCallback(error);
}
};
const onData = buf => {
properLastChunkReceived = node_buffer.Buffer.compare(buf.slice(-5), LAST_CHUNK) === 0;
// Sometimes final 0-length chunk and end of message code are in separate packets
if (!properLastChunkReceived && previousChunk) {
properLastChunkReceived = (
node_buffer.Buffer.compare(previousChunk.slice(-3), LAST_CHUNK.slice(0, 3)) === 0 &&
node_buffer.Buffer.compare(buf.slice(-2), LAST_CHUNK.slice(3)) === 0
);
}
previousChunk = buf;
};
socket.prependListener('close', onSocketClose);
socket.on('data', onData);
request.on('close', () => {
socket.removeListener('close', onSocketClose);
socket.removeListener('data', onData);
});
});
}
exports.AbortError = AbortError;
exports.Blob = Blob;
exports.FetchError = FetchError;
exports.File = File;
exports.FormData = FormData;
exports.Headers = Headers;
exports.Request = Request;
exports.Response = Response;
exports.blobFrom = blobFrom;
exports.blobFromSync = blobFromSync;
exports.default = fetch;
exports.fileFrom = fileFrom;
exports.fileFromSync = fileFromSync;
exports.isRedirect = isRedirect;
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