93fe2b57d6
This adds `page.workers()`, and two events `workercreated` and `workerdestroyed`. It also forwards logs from a worker into the page `console` event. Only dedicated workers are supported for now, ServiceWorkers will probably work differently because they aren't necessarily associated with a single page. Fixes #2350.
60 lines
2.0 KiB
JavaScript
60 lines
2.0 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 EventEmitter = require('events');
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const {helper, debugError} = require('./helper');
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const {ExecutionContext, JSHandle} = require('./ExecutionContext');
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class Worker extends EventEmitter {
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/**
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* @param {Puppeteer.CDPSession} client
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* @param {string} url
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* @param {function(!Protocol.Log.entryAddedPayload)} logEntryAdded
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*/
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constructor(client, url, logEntryAdded) {
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super();
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this._client = client;
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this._url = url;
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this._executionContextPromise = new Promise(x => this._executionContextCallback = x);
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this._client.on('Runtime.executionContextCreated', event => {
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const jsHandleFactory = remoteObject => new JSHandle(executionContext, client, remoteObject);
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const executionContext = new ExecutionContext(client, event.context, jsHandleFactory, null);
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this._executionContextCallback(executionContext);
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});
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// This might fail if the target is closed before we recieve all execution contexts.
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this._client.send('Runtime.enable', {}).catch(debugError);
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this._client.on('Log.entryAdded', logEntryAdded);
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this._client.send('Log.enable', {}).catch(debugError);
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}
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/**
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* @return {string}
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*/
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url() {
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return this._url;
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}
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/**
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* @return {!Promise<ExecutionContext>}
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*/
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async executionContext() {
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return this._executionContextPromise;
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}
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}
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module.exports = Worker;
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helper.tracePublicAPI(Worker);
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