62 lines
1.9 KiB
JavaScript
62 lines
1.9 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.StreamDispatcher = void 0;
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var _dispatcher = require("./dispatcher");
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var _utils = require("../../utils");
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/**
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* Copyright (c) Microsoft Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the 'License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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class StreamDispatcher extends _dispatcher.Dispatcher {
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constructor(scope, stream) {
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super(scope, {
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guid: 'stream@' + (0, _utils.createGuid)(),
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stream
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}, 'Stream', {});
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// In Node v12.9.0+ we can use readableEnded.
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this._type_Stream = true;
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this._ended = false;
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stream.once('end', () => this._ended = true);
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stream.once('error', () => this._ended = true);
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}
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async read(params) {
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const stream = this._object.stream;
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if (this._ended) return {
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binary: Buffer.from('')
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};
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if (!stream.readableLength) {
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const readyPromise = new _utils.ManualPromise();
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const done = () => readyPromise.resolve();
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stream.on('readable', done);
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stream.on('end', done);
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stream.on('error', done);
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await readyPromise;
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stream.off('readable', done);
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stream.off('end', done);
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stream.off('error', done);
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}
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const buffer = stream.read(Math.min(stream.readableLength, params.size || stream.readableLength));
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return {
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binary: buffer || Buffer.from('')
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};
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}
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async close() {
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this._object.stream.destroy();
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}
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}
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exports.StreamDispatcher = StreamDispatcher; |