How to use WritableStreamDefaultControllerErrorIfNeeded method in wpt

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transfer.js

Source:transfer.js Github

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1'use strict';2const {3 ObjectDefineProperties,4 PromiseResolve,5 ReflectConstruct,6} = primordials;7const {8 kState,9 setPromiseHandled,10} = require('internal/webstreams/util');11const {12 DOMException,13} = internalBinding('messaging');14const {15 ReadableStream,16 readableStreamDefaultControllerEnqueue,17 readableStreamDefaultControllerClose,18 readableStreamDefaultControllerError,19 readableStreamPipeTo,20} = require('internal/webstreams/readablestream');21const {22 WritableStream,23 writableStreamDefaultControllerErrorIfNeeded,24} = require('internal/webstreams/writablestream');25const {26 createDeferredPromise,27} = require('internal/util');28const assert = require('internal/assert');29const {30 makeTransferable,31 kClone,32 kDeserialize,33} = require('internal/worker/js_transferable');34// This class is a bit of a hack. The Node.js implementation of35// DOMException is not transferable/cloneable. This provides us36// with a variant that is. Unfortunately, it means playing around37// a bit with the message, name, and code properties and the38// prototype. We can revisit this if DOMException is ever made39// properly cloneable.40class CloneableDOMException extends DOMException {41 constructor(message, name) {42 super(message, name);43 this[kDeserialize]({44 message: this.message,45 name: this.name,46 code: this.code,47 });48 // eslint-disable-next-line no-constructor-return49 return makeTransferable(this);50 }51 [kClone]() {52 return {53 data: {54 message: this.message,55 name: this.name,56 code: this.code,57 },58 deserializeInfo:59 'internal/webstreams/transfer:InternalCloneableDOMException'60 };61 }62 [kDeserialize]({ message, name, code }) {63 ObjectDefineProperties(this, {64 message: {65 configurable: true,66 enumerable: true,67 get() { return message; },68 },69 name: {70 configurable: true,71 enumerable: true,72 get() { return name; },73 },74 code: {75 configurable: true,76 enumerable: true,77 get() { return code; },78 },79 });80 }81}82function InternalCloneableDOMException() {83 return makeTransferable(84 ReflectConstruct(85 CloneableDOMException,86 [],87 DOMException));88}89InternalCloneableDOMException[kDeserialize] = () => {};90class CrossRealmTransformReadableSource {91 constructor(port) {92 this[kState] = {93 port,94 controller: undefined,95 };96 port.onmessage = ({ data }) => {97 const {98 controller,99 } = this[kState];100 const {101 type,102 value,103 } = data;104 switch (type) {105 case 'chunk':106 readableStreamDefaultControllerEnqueue(107 controller,108 value);109 break;110 case 'close':111 readableStreamDefaultControllerClose(controller);112 port.close();113 break;114 case 'error':115 readableStreamDefaultControllerError(controller, value);116 port.close();117 break;118 }119 };120 port.onmessageerror = () => {121 const error = new CloneableDOMException(122 'Internal transferred ReadableStream error',123 'DataCloneError');124 port.postMessage({ type: 'error', value: error });125 readableStreamDefaultControllerError(126 this[kState].controller,127 error);128 port.close();129 };130 }131 start(controller) {132 this[kState].controller = controller;133 }134 async pull() {135 this[kState].port.postMessage({ type: 'pull' });136 }137 async cancel(reason) {138 try {139 this[kState].port.postMessage({ type: 'error', value: reason });140 } catch (error) {141 if (error instanceof DOMException) {142 // eslint-disable-next-line no-ex-assign143 error = new CloneableDOMException(error.message, error.name);144 }145 this[kState].port.postMessage({ type: 'error', value: error });146 throw error;147 } finally {148 this[kState].port.close();149 }150 }151}152class CrossRealmTransformWritableSink {153 constructor(port) {154 this[kState] = {155 port,156 controller: undefined,157 backpressurePromise: createDeferredPromise(),158 };159 port.onmessage = ({ data }) => {160 assert(typeof data === 'object');161 const {162 type,163 value164 } = { ...data };165 assert(typeof type === 'string');166 switch (type) {167 case 'pull':168 if (this[kState].backpressurePromise !== undefined)169 this[kState].backpressurePromise.resolve?.();170 this[kState].backpressurePromise = undefined;171 break;172 case 'error':173 writableStreamDefaultControllerErrorIfNeeded(174 this[kState].controller,175 value);176 if (this[kState].backpressurePromise !== undefined)177 this[kState].backpressurePromise.resolve?.();178 this[kState].backpressurePromise = undefined;179 break;180 }181 };182 port.onmessageerror = () => {183 const error = new CloneableDOMException(184 'Internal transferred ReadableStream error',185 'DataCloneError');186 port.postMessage({ type: 'error', value: error });187 writableStreamDefaultControllerErrorIfNeeded(188 this[kState].controller,189 error);190 port.close();191 };192 }193 start(controller) {194 this[kState].controller = controller;195 }196 async write(chunk) {197 if (this[kState].backpressurePromise === undefined) {198 this[kState].backpressurePromise = {199 promise: PromiseResolve(),200 resolve: undefined,201 reject: undefined,202 };203 }204 await this[kState].backpressurePromise.promise;205 this[kState].backpressurePromise = createDeferredPromise();206 try {207 this[kState].port.postMessage({ type: 'chunk', value: chunk });208 } catch (error) {209 if (error instanceof DOMException) {210 // eslint-disable-next-line no-ex-assign211 error = new CloneableDOMException(error.message, error.name);212 }213 this[kState].port.postMessage({ type: 'error', value: error });214 this[kState].port.close();215 throw error;216 }217 }218 close() {219 this[kState].port.postMessage({ type: 'close' });220 this[kState].port.close();221 }222 abort(reason) {223 try {224 this[kState].port.postMessage({ type: 'error', value: reason });225 } catch (error) {226 if (error instanceof DOMException) {227 // eslint-disable-next-line no-ex-assign228 error = new CloneableDOMException(error.message, error.name);229 }230 this[kState].port.postMessage({ type: 'error', value: error });231 throw error;232 } finally {233 this[kState].port.close();234 }235 }236}237function newCrossRealmReadableStream(writable, port) {238 const readable =239 new ReadableStream(240 new CrossRealmTransformReadableSource(port));241 const promise =242 readableStreamPipeTo(readable, writable, false, false, false);243 setPromiseHandled(promise);244 return {245 readable,246 promise,247 };248}249function newCrossRealmWritableSink(readable, port) {250 const writable =251 new WritableStream(252 new CrossRealmTransformWritableSink(port));253 const promise = readableStreamPipeTo(readable, writable, false, false, false);254 setPromiseHandled(promise);255 return {256 writable,257 promise,258 };259}260module.exports = {261 newCrossRealmReadableStream,262 newCrossRealmWritableSink,263 CrossRealmTransformWritableSink,264 CrossRealmTransformReadableSource,265 CloneableDOMException,266 InternalCloneableDOMException,...

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1import { WritableStreamDefaultControllerErrorIfNeeded } from 'streams/writable-streams/default-controller.mjs';2import { WritableStream } from 'streams/writable-streams/writable-stream.mjs';3import { WritableStreamDefaultWriter } from 'streams/writable-streams/writable-stream-default-writer.mjs';4import { WritableStreamDefaultController } from 'streams/writable-streams/writable-stream-default-controller.mjs';5const ws = new WritableStream({6 start(c) {7 }8});9const writer = new WritableStreamDefaultWriter(ws);10const controller = writer.desiredSize;11WritableStreamDefaultControllerErrorIfNeeded(controller, new RangeError('Hello'));12writer.close();13import { WritableStreamDefaultControllerError } from 'streams/writable-streams/writable-stream-default-controller.mjs';14export function WritableStreamDefaultControllerErrorIfNeeded(controller, e) {15 if (controller._started) {16 WritableStreamDefaultControllerError(controller, e);17 }18}19import { WritableStreamDefaultControllerErrorIfNeeded } from 'streams/writable-streams/default-controller.mjs';20import { WritableStream } from 'streams/writable-streams/writable-stream.mjs';21import { WritableStreamDefaultWriter } from 'streams/writable-streams/writable-stream-default-writer.mjs';22import { WritableStreamDefaultController } from 'streams/writable-streams/writable-stream-default-controller.mjs';23export function WritableStreamDefaultControllerError(controller, e) {24 const stream = controller._controlledWritableStream;25 WritableStreamDefaultControllerClearAlgorithms(controller);26 WritableStreamStartErroring(stream, e);27}28import { WritableStreamDefaultControllerErrorIfNeeded } from 'streams/writable-streams/default-controller.mjs';29import { WritableStream } from 'streams/writable-streams/writable-stream.mjs';30import { WritableStreamDefaultWriter } from 'streams/writable-streams/writable-stream-default-writer.mjs';31import { WritableStreamDefaultController } from 'streams/writable-streams/writable-stream-default-controller.mjs';32export function WritableStreamStartErroring(stream, reason) {33 const state = stream._state;34 if (state === 'writable') {

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1var rs = new ReadableStream({2 start(controller) {3 controller.enqueue("a");4 controller.close();5 }6});7var ws = new WritableStream({8 write(chunk) {9 return new Promise(resolve => {10 setTimeout(resolve, 200);11 });12 }13});14var writer = ws.getWriter();15writer.write("a");16writer.close();17var reader = rs.getReader();18reader.read().then(function(result) {19 assert_equals(result.value, "a", "read result");20 assert_false(result.done, "done");21 reader.releaseLock();22 writer.releaseLock();23 return delay(0);24}).then(function() {25 return delay(200);26}).then(function() {27 assert_equals(ws.state, "closed", "ws state");28 t.done();29}).catch(t.step_func(function(e) {30 assert_unreached(e);31}));32var rs = new ReadableStream({33 start(controller) {34 controller.enqueue("a");35 controller.close();36 }37});38var ws = new WritableStream({39 write(chunk) {40 return new Promise(resolve => {41 setTimeout(resolve, 200);42 });43 }44});45var writer = ws.getWriter();46writer.write("a");47writer.close();48var reader = rs.getReader();49reader.read().then(function(result) {50 assert_equals(result.value, "a", "read result");51 assert_false(result.done, "done");52 reader.releaseLock();53 writer.releaseLock();54 return delay(0);55}).then(function() {56 return delay(200);57}).then(function() {58 assert_equals(ws.state, "closed", "ws state");59 t.done();60}).catch(t.step_func(function(e) {61 assert_unreached(e);62}));63var rs = new ReadableStream({64 start(controller) {65 controller.enqueue("a");66 controller.close();67 }68});69var ws = new WritableStream({70 write(chunk) {71 return new Promise(resolve => {72 setTimeout(resolve, 200);73 });74 }75});76var writer = ws.getWriter();77writer.write("a");

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1'use strict';2const stream = require('stream');3const assert = require('assert');4const readable = new stream.Readable({5 read() {}6});7readable.push('a');8readable.push('b');9readable.push('c');10readable.push(null);11const writable = new stream.Writable({12 write(chunk, encoding, callback) {13 callback(new Error('error'));14 }15});16readable.pipe(writable).on('error', common.mustCall((err) => {17 assert.strictEqual(err.message, 'error');18}));19'use strict';20const stream = require('stream');21const assert = require('assert');22const readable = new stream.Readable({23 read() {}24});25readable.push('a');26readable.push('b');27readable.push('c');28readable.push(null);29const writable = new stream.Writable({30 write(chunk, encoding, callback) {31 callback(new Error('error'));32 }33});34readable.pipe(writable).on('error', common.mustCall((err) => {35 assert.strictEqual(err.message, 'error');36}));37'use strict';38const stream = require('stream');39const assert = require('assert');40const readable = new stream.Readable({41 read() {}42});43readable.push('a');44readable.push('b');45readable.push('c');46readable.push(null);47const writable = new stream.Writable({48 write(chunk, encoding, callback) {49 callback(new Error('error'));50 }51});52readable.pipe(writable).on('error', common.mustCall((err) => {53 assert.strictEqual(err.message, 'error');54}));55'use strict';56const stream = require('stream');57const assert = require('assert');58const readable = new stream.Readable({59 read() {}60});61readable.push('a');62readable.push('b');63readable.push('c');64readable.push(null);65const writable = new stream.Writable({66 write(chunk, encoding, callback) {67 callback(new Error('error'));68 }69});70readable.pipe(writable).on('error', common.mustCall((err) => {71 assert.strictEqual(err.message, 'error');72}));

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1 > LayoutTests/imported/w3c/web-platform-tests/streams/readable-streams/writable-streams/general.js:392> +test(() => {3> + const ws = new WritableStream();4> + const writer = ws.getWriter();5> + writer.releaseLock();6> + assert_throws(new TypeError(), () => writer.releaseLock());7> +}, 'releaseLock() on a released writer should throw a TypeError');8> +test(() => {9> + const ws = new WritableStream();10> + const writer = ws.getWriter();11> + writer.releaseLock();12> + assert_throws(new TypeError(), () => writer.write());13> +}, 'write() on a released writer should throw a TypeError');14> +test(() => {15> + const ws = new WritableStream();16> + const writer = ws.getWriter();17> + writer.releaseLock();18> + assert_throws(new TypeError(), () => writer.close());19> +}, 'close() on a released writer should throw a TypeError');20> +test(() => {21> + const ws = new WritableStream();22> + const writer = ws.getWriter();23> + writer.releaseLock();24> + assert_throws(new TypeError(), () => writer.abort());25> +}, 'abort() on a released writer should throw a TypeError');26> +test(() => {27> + const ws = new WritableStream();28> + const writer = ws.getWriter();29> + writer.releaseLock();30> + assert_throws(new TypeError(), () => writer.closed);31> +}, 'closed getter on a released writer should throw a TypeError');32> +test(() => {33> + const ws = new WritableStream();34> + const writer = ws.getWriter();35> + writer.releaseLock();36> + assert_throws(new TypeError(), () => writer.desiredSize);37> +}, 'desiredSize getter on a released writer should throw a TypeError');38> +test(() => {39> + const ws = new WritableStream();40> + const writer = ws.getWriter();41> + writer.releaseLock();

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1var WritableStream = require('stream').Writable;2var ws = new WritableStream({3 write: function(chunk, encoding, callback) {4 callback(new Error('error'));5 }6});

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1import { WritableStreamDefaultControllerErrorIfNeeded } from2'./writable-stream.js';3export async function writeError(controller, error) {4 WritableStreamDefaultControllerErrorIfNeeded(controller, error);5}6export function WritableStreamDefaultControllerErrorIfNeeded(controller,7error) {8 if (controller._controlledWritableStream._state === 'writable') {9 WritableStreamDefaultControllerError(controller, error);10 }11}12export function WritableStreamDefaultControllerError(controller, error) {13 const stream = controller._controlledWritableStream;14 if (stream._state === 'writable') {15 WritableStreamStartErroring(stream, error);16 }17}18export function WritableStreamStartErroring(stream, reason) {19 stream._state = 'erroring';20 stream._storedError = reason;21 const writer = stream._writer;22 if (writer !== undefined) {23 WritableStreamDefaultWriterEnsureReadyPromiseRejectedWith(writer, reason,24 true);25 }26 if (!stream._pendingAbortRequest) {27 WritableStreamFinishErroring(stream);28 }29}30export function WritableStreamFinishErroring(stream) {31 stream._state = 'errored';32 stream._writableStreamController[ErrorSteps]();33 const storedError = stream._storedError;34 stream._writableStreamController[ErrorSteps] = () => {35 throw storedError;36 };37 const writer = stream._writer;38 if (writer !== undefined) {39 defaultWriterClosedPromiseReject(writer, storedError);40 writer._readyPromise = Promise.reject(storedError);41 }42}43export function defaultWriterClosedPromiseReject(writer, reason) {44 if (writer._closedPromiseState === 'pending') {45 defaultWriterClosedPromiseInitializeAsRejected(writer, reason);46 }47}48export function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) {

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1import { WritableStreamDefaultControllerErrorIfNeeded } from './aborting.js';2const controller = {3 _pendingAbortRequest: {4 _reject: () => {}5 }6};7WritableStreamDefaultControllerErrorIfNeeded(controller, new Error('test'));8import { WritableStreamDefaultControllerErrorIfNeeded } from './aborting.js';9const controller = {10 _pendingAbortRequest: {11 _reject: () => {}12 }13};14WritableStreamDefaultControllerErrorIfNeeded(controller, new Error('test'));15import { WritableStreamDefaultControllerErrorIfNeeded } from './aborting.js';16const controller = {17 _pendingAbortRequest: {18 _reject: () => {}19 }20};21WritableStreamDefaultControllerErrorIfNeeded(controller, new Error('test'));22import { WritableStreamDefaultControllerErrorIfNeeded } from './aborting.js';23const controller = {24 _pendingAbortRequest: {25 _reject: () => {}26 }27};28WritableStreamDefaultControllerErrorIfNeeded(controller, new Error('test'));29The controller object is the object you pass to the WritableStreamDefaultControllerErrorIfNeeded() function. So you need to create a controller object that has the

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1> + var controller = new WritableStreamDefaultController(stream); 2> + const error = new Error('error'); 3>> + var controller = new WritableStreamDefaultController(stream);4>> + const error = new Error('error');5>> + var controller = new WritableStreamDefaultController(stream);6>> + const error = new Error('error');

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