mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
e8a085ccfb
This patch starts using pipes as a transport to the browser instance instead of websocket.
70 lines
1.9 KiB
JavaScript
70 lines
1.9 KiB
JavaScript
/**
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* Copyright 2018 Google Inc. All rights reserved.
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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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const {helper} = require('./helper');
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const EventEmitter = require('events');
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class Pipe extends EventEmitter {
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/**
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* @param {!NodeJS.WritableStream} pipeWrite
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* @param {!NodeJS.ReadableStream} pipeRead
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*/
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constructor(pipeWrite, pipeRead) {
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super();
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this._pipeWrite = pipeWrite;
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this._pendingMessage = '';
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this._eventListeners = [
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helper.addEventListener(pipeRead, 'data', buffer => this._dispatch(buffer))
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];
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}
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/**
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* @param {string} message
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*/
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send(message) {
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this._pipeWrite.write(message);
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this._pipeWrite.write('\n');
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}
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/**
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* @param {!Buffer} buffer
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*/
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_dispatch(buffer) {
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let end = buffer.indexOf('\n');
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if (end === -1) {
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this._pendingMessage += buffer.toString();
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return;
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}
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const message = this._pendingMessage + buffer.toString(undefined, 0, end);
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this.emit('message', message);
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let start = end + 1;
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end = buffer.indexOf('\n', start);
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while (end !== -1) {
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this.emit('message', buffer.toString(undefined, start, end));
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start = end + 1;
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end = buffer.indexOf('\n', start);
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}
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this._pendingMessage = buffer.toString(undefined, start);
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}
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close() {
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this._pipeWrite = null;
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helper.removeEventListeners(this._eventListeners);
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}
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}
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module.exports = Pipe;
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