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dee03049f5
* Return whether to keep flowing in Host config * Emit basic chunk based streaming in the Flight server When something suspends a new chunk is created. * Add reentrancy check The WHATWG API is designed to be pulled recursively. We should refactor to favor that approach. * Basic streaming Suspense support on the client * Add basic suspense in example * Add comment describing the protocol that the server generates
65 lines
1.8 KiB
JavaScript
65 lines
1.8 KiB
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow
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*/
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import type {Writable} from 'stream';
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type MightBeFlushable = {
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flush?: () => void,
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flushHeaders?: () => void, // Legacy
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};
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export type Destination = Writable & MightBeFlushable;
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export function scheduleWork(callback: () => void) {
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setImmediate(callback);
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}
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export function flushBuffered(destination: Destination) {
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// If we don't have any more data to send right now.
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// Flush whatever is in the buffer to the wire.
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if (typeof destination.flush === 'function') {
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// http.createServer response have flush(), but it has a different meaning and
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// is deprecated in favor of flushHeaders(). Detect to avoid a warning.
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if (typeof destination.flushHeaders !== 'function') {
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// By convention the Zlib streams provide a flush function for this purpose.
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destination.flush();
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}
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}
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}
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export function beginWriting(destination: Destination) {
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// Older Node streams like http.createServer don't have this.
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if (typeof destination.cork === 'function') {
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destination.cork();
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}
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}
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export function writeChunk(
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destination: Destination,
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buffer: Uint8Array,
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): boolean {
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let nodeBuffer = ((buffer: any): Buffer); // close enough
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return destination.write(nodeBuffer);
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}
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export function completeWriting(destination: Destination) {
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// Older Node streams like http.createServer don't have this.
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if (typeof destination.uncork === 'function') {
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destination.uncork();
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}
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}
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export function close(destination: Destination) {
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destination.end();
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}
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export function convertStringToBuffer(content: string): Uint8Array {
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return Buffer.from(content, 'utf8');
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}
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