How to use ReadableStreamCancel method in wpt

Best JavaScript code snippet using wpt

pipe.ts

Source:pipe.ts

...61        }62        if (!preventCancel) {63          actions.push(() => {64            if (source._state === 'readable') {65              return ReadableStreamCancel(source, error);66            }67            return promiseResolvedWith(undefined);68          });69        }70        shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);71      };72      if (signal.aborted) {73        abortAlgorithm();74        return;75      }76      signal.addEventListener('abort', abortAlgorithm);77    }78    // Using reader and writer, read all chunks from this and write them to dest79    // - Backpressure must be enforced80    // - Shutdown must stop all activity81    function pipeLoop() {82      return newPromise<void>((resolveLoop, rejectLoop) => {83        function next(done: boolean) {84          if (done) {85            resolveLoop();86          } else {87            // Use `PerformPromiseThen` instead of `uponPromise` to avoid88            // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers89            PerformPromiseThen(pipeStep(), next, rejectLoop);90          }91        }92        next(false);93      });94    }95    function pipeStep(): Promise<boolean> {96      if (shuttingDown) {97        return promiseResolvedWith(true);98      }99      return PerformPromiseThen(writer._readyPromise, () => {100        return newPromise<boolean>((resolveRead, rejectRead) => {101          ReadableStreamDefaultReaderRead(102            reader,103            {104              _chunkSteps: chunk => {105                currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);106                resolveRead(false);107              },108              _closeSteps: () => resolveRead(true),109              _errorSteps: rejectRead110            }111          );112        });113      });114    }115    // Errors must be propagated forward116    isOrBecomesErrored(source, reader._closedPromise, storedError => {117      if (!preventAbort) {118        shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);119      } else {120        shutdown(true, storedError);121      }122    });123    // Errors must be propagated backward124    isOrBecomesErrored(dest, writer._closedPromise, storedError => {125      if (!preventCancel) {126        shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);127      } else {128        shutdown(true, storedError);129      }130    });131    // Closing must be propagated forward132    isOrBecomesClosed(source, reader._closedPromise, () => {133      if (!preventClose) {134        shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));135      } else {136        shutdown();137      }138    });139    // Closing must be propagated backward140    if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {141      const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');142      if (!preventCancel) {143        shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);144      } else {145        shutdown(true, destClosed);146      }147    }148    setPromiseIsHandledToTrue(pipeLoop());149    function waitForWritesToFinish(): Promise<void> {150      // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait151      // for that too.152      const oldCurrentWrite = currentWrite;153      return PerformPromiseThen(154        currentWrite,155        () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined156      );157    }...

tee.ts

Source:tee.ts

...78    canceled1 = true;79    reason1 = reason;80    if (canceled2) {81      const compositeReason = CreateArrayFromList([reason1, reason2]);82      const cancelResult = ReadableStreamCancel(stream, compositeReason);83      resolveCancelPromise(cancelResult);84    }85    return cancelPromise;86  }87  function cancel2Algorithm(reason: any): Promise<void> {88    canceled2 = true;89    reason2 = reason;90    if (canceled1) {91      const compositeReason = CreateArrayFromList([reason1, reason2]);92      const cancelResult = ReadableStreamCancel(stream, compositeReason);93      resolveCancelPromise(cancelResult);94    }95    return cancelPromise;96  }97  function startAlgorithm() {98    // do nothing99  }100  branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);101  branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);102  uponRejection(reader._closedPromise, (r: any) => {103    ReadableStreamDefaultControllerError(branch1._readableStreamController as ReadableStreamDefaultController<R>, r);104    ReadableStreamDefaultControllerError(branch2._readableStreamController as ReadableStreamDefaultController<R>, r);105  });106  return [branch1, branch2];...

ofReadableStream.ts

Source:ofReadableStream.ts

...23        observer.complete();24      }25    });26    this.stream.pipe(sink);27    return new ReadableStreamCancel(this.stream, sink);28  }29}30class ReadableStreamCancel implements Cancellation {31  constructor(32    private stream: NodeJS.ReadableStream,33    private sink: NodeJS.WritableStream34  ) {}35  cancel() {36    this.stream.unpipe(this.sink);37  }38}39function normalize(data: unknown) {40  if (typeof data === "string") {41    return data;...

Using AI Code Generation

1var rs = new ReadableStream({2  start(controller) {3    controller.enqueue('a');4    controller.enqueue('b');5    controller.enqueue('c');6  }7});8var reader = rs.getReader();9var result = reader.read();10result.then(function(r) {11  console.log(r);12  return reader.cancel();13}).then(function() {14  console.log('done');15});16var rs = new ReadableStream({17  start(controller) {18    controller.enqueue('a');19    controller.enqueue('b');20    controller.enqueue('c');21  }22});23var reader = rs.getReader();24var result = reader.read();25result.then(function(r) {26  console.log(r);27  return reader.releaseLock();28}).then(function() {29  console.log('done');30});31var rs = new ReadableStream({32  start(controller) {33    controller.enqueue('a');34    controller.enqueue('b');35    controller.enqueue('c');36  }37});38var reader = rs.getReader();39var result = reader.read();40result.then(function(r) {41  console.log(r);42  return reader.releaseLock();43}).then(function() {44  console.log('done');45});46var rs = new ReadableStream({47  start(controller) {48    controller.enqueue('a');49    controller.enqueue('b');50    controller.enqueue('c');51  }52});53var reader = rs.getReader();54var result = reader.read();55result.then(function(r) {56  console.log(r);57  return reader.releaseLock();58}).then(function() {59  console.log('done');60});61var rs = new ReadableStream({62  start(controller) {63    controller.enqueue('a');64    controller.enqueue('b');65    controller.enqueue('c');66  }67});68var reader = rs.getReader();69var result = reader.read();70result.then(function(r) {71  console.log(r);72  return reader.releaseLock();73}).then(function() {74  console.log('done');75});76var rs = new ReadableStream({77  start(controller

Using AI Code Generation

1var rs = new ReadableStream({2  start(controller) {3    controller.enqueue("a");4    controller.enqueue("b");5    controller.enqueue("c");6  }7});8var reader = rs.getReader();9var readPromise = reader.read();10readPromise.then(result1 => {11  var cancelPromise = reader.cancel("reason");12  cancelPromise.then(() => {13    console.log("cancel finished");14  });15});16readPromise.then(result2 => {17});18var rs = new ReadableStream({19  start(controller) {20    controller.enqueue("a");21    controller.enqueue("b");22    controller.enqueue("c");23  }24});25var reader = rs.getReader();26var readPromise = reader.read();27readPromise.then(result1 => {28  var cancelPromise = reader.cancel("reason");29  cancelPromise.then(() => {30    console.log("cancel finished");31  });32});33readPromise.then(result2 => {34});35var rs = new ReadableStream({36  start(controller) {37    controller.enqueue("a");38    controller.enqueue("b");39    controller.enqueue("c");40  }41});42var reader = rs.getReader();43var readPromise = reader.read();44readPromise.then(result1 => {

Using AI Code Generation

1var rs = new ReadableStream({2    start: function(controller) {3        controller.enqueue('a');4        controller.enqueue('b');5        controller.enqueue('c');6    }7});8var reader = rs.getReader();9reader.read().then(function(result) {10    return reader.read();11}).then(function(result) {12    return reader.read();13}).then(function(result) {14    return reader.read();15}).then(function(result) {16});17var reader = rs.getReader();18reader.read().then(function(result) {19    return reader.read();20}).then(function(result) {21    return reader.read();22}).then(function(result) {23    return reader.read();24}).then(function(result) {25});26var reader = rs.getReader();27reader.read().then(function(result) {28    return reader.read();29}).then(function(result) {30    return reader.read();31}).then(function(result) {32    return reader.read();33}).then(function(result) {34});35var reader = rs.getReader();36reader.read().then(function(result) {37    return reader.read();38}).then(function(result) {39    return reader.read();40}).then(function(result) {41    return reader.read();42}).then(function(result) {43});44var reader = rs.getReader();45reader.read().then(function(result) {

Using AI Code Generation

1var rs = new ReadableStream({2  start(controller) {3    controller.enqueue(1);4    controller.enqueue(2);5    controller.enqueue(3);6  }7});

Using AI Code Generation

1var rs = new ReadableStream();2var reader = rs.getReader();3var cancelPromise = reader.cancel("reason");4cancelPromise.then(function(result) {5});6var rs = new ReadableStream();7var reader = rs.getReader();8var cancelPromise = reader.cancel("reason");9cancelPromise.then(function(result) {10});11var rs = new ReadableStream();12var reader = rs.getReader();13var cancelPromise = reader.cancel("reason");14cancelPromise.then(function(result) {15});16var rs = new ReadableStream();17var reader = rs.getReader();18var cancelPromise = reader.cancel("reason");19cancelPromise.then(function(result) {20});21var rs = new ReadableStream();22var reader = rs.getReader();23var cancelPromise = reader.cancel("reason");24cancelPromise.then(function(result) {25});26var rs = new ReadableStream();27var reader = rs.getReader();28var cancelPromise = reader.cancel("reason");29cancelPromise.then(function(result) {30});31var rs = new ReadableStream();32var reader = rs.getReader();33var cancelPromise = reader.cancel("reason");34cancelPromise.then(function(result) {35});36var rs = new ReadableStream();37var reader = rs.getReader();38var cancelPromise = reader.cancel("reason");39cancelPromise.then(function(result) {40});41var rs = new ReadableStream();42var reader = rs.getReader();43var cancelPromise = reader.cancel("reason");44cancelPromise.then(function(result) {45});

Using AI Code Generation

1function cancelStream(){2  var rs = new ReadableStream();3  rs.cancel();4}5function cancelStream(){6  var rs = new ReadableStream();7  rs.cancel();8}

Using AI Code Generation

1function testCancelMethod() {2  var rs = new ReadableStream();3  var reader = rs.getReader();4  reader.cancel();5  reader.closed.then(function() {6    test(function() {7      assert_equals(rs.state, "closed");8    }, "ReadableStreamCancel method");9  });10}

Using AI Code Generation

1function ReadableStreamCancel(reason) {2    var cancelPromise = new Promise(function(resolve, reject) {3        if (this.state != 'readable') {4            throw new Error('stream is not readable');5        }6        if (this.state == 'closed') {7            resolve();8            return;9        }10        this.state = 'canceled';11        this.cancelReason = reason;12        resolve();13    });14    return cancelPromise;15}

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