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ReactServerStreamConfigBrowser.js
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ReactServerStreamConfigBrowser.js
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/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @flow
*/
export type Destination = ReadableStreamController;
export type PrecomputedChunk = Uint8Array;
export type Chunk = Uint8Array;
export function scheduleWork(callback: () => void) {
callback();
}
export function flushBuffered(destination: Destination) {
// WHATWG Streams do not yet have a way to flush the underlying
// transform streams. https://github.com/whatwg/streams/issues/960
}
export function beginWriting(destination: Destination) {}
export function writeChunk(
destination: Destination,
chunk: PrecomputedChunk | Chunk,
): boolean {
destination.enqueue(chunk);
return destination.desiredSize > 0;
}
export function completeWriting(destination: Destination) {}
export function close(destination: Destination) {
destination.close();
}
const textEncoder = new TextEncoder();
export function stringToChunk(content: string): Chunk {
return textEncoder.encode(content);
}
export function stringToPrecomputedChunk(content: string): PrecomputedChunk {
return textEncoder.encode(content);
}
export function closeWithError(destination: Destination, error: mixed): void {
if (typeof destination.error === 'function') {
// $FlowFixMe: This is an Error object or the destination accepts other types.
destination.error(error);
} else {
// Earlier implementations doesn't support this method. In that environment you're
// supposed to throw from a promise returned but we don't return a promise in our
// approach. We could fork this implementation but this is environment is an edge
// case to begin with. It's even less common to run this in an older environment.
// Even then, this is not where errors are supposed to happen and they get reported
// to a global callback in addition to this anyway. So it's fine just to close this.
destination.close();
}
}