puppeteer/lib/Launcher.js

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/**
* Copyright 2017 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
const path = require('path');
const removeRecursive = require('rimraf').sync;
const childProcess = require('child_process');
const Downloader = require('../utils/ChromiumDownloader');
const Connection = require('./Connection');
const Browser = require('./Browser');
const readline = require('readline');
const CHROME_PROFILE_PATH = path.resolve(__dirname, '..', '.dev_profile');
let browserId = 0;
const DEFAULT_ARGS = [
'--disable-background-networking',
'--disable-background-timer-throttling',
'--disable-client-side-phishing-detection',
'--disable-default-apps',
'--disable-hang-monitor',
'--disable-popup-blocking',
'--disable-prompt-on-repost',
'--disable-sync',
'--enable-automation',
'--metrics-recording-only',
'--no-first-run',
'--password-store=basic',
'--remote-debugging-port=0',
'--safebrowsing-disable-auto-update',
'--use-mock-keychain',
];
class Launcher {
/**
* @param {!Object} options
* @return {!Promise<!Browser>}
*/
static async launch(options) {
options = options || {};
++browserId;
let userDataDir = CHROME_PROFILE_PATH + browserId;
let chromeArguments = DEFAULT_ARGS.concat([
`--user-data-dir=${userDataDir}`,
]);
if (typeof options.headless !== 'boolean' || options.headless) {
chromeArguments.push(
`--headless`,
`--disable-gpu`,
`--hide-scrollbars`
);
}
let chromeExecutable = options.executablePath;
if (typeof chromeExecutable !== 'string') {
let chromiumRevision = require('../package.json').puppeteer.chromium_revision;
let revisionInfo = Downloader.revisionInfo(Downloader.currentPlatform(), chromiumRevision);
console.assert(revisionInfo, 'Chromium revision is not downloaded. Run npm install');
chromeExecutable = revisionInfo.executablePath;
}
if (Array.isArray(options.args))
chromeArguments.push(...options.args);
let chromeProcess = childProcess.spawn(chromeExecutable, chromeArguments, {});
if (options.dumpio) {
chromeProcess.stdout.pipe(process.stdout);
chromeProcess.stderr.pipe(process.stderr);
}
let stderr = '';
chromeProcess.stderr.on('data', data => stderr += data.toString('utf8'));
// Cleanup as processes exit.
const onProcessExit = () => chromeProcess.kill();
process.on('exit', onProcessExit);
let terminated = false;
chromeProcess.on('exit', () => {
terminated = true;
process.removeListener('exit', onProcessExit);
removeRecursive(userDataDir);
});
let browserWSEndpoint = await waitForWSEndpoint(chromeProcess);
if (terminated)
throw new Error('Failed to launch chrome! ' + stderr);
// Failed to connect to browser.
if (!browserWSEndpoint) {
chromeProcess.kill();
throw new Error('Failed to connect to chrome!');
}
let connectionDelay = options.slowMo || 0;
let connection = await Connection.create(browserWSEndpoint, connectionDelay);
return new Browser(connection, !!options.ignoreHTTPSErrors, () => chromeProcess.kill());
}
/**
* @param {string} options
* @return {!Promise<!Browser>}
*/
static async connect({browserWSEndpoint, ignoreHTTPSErrors = false}) {
let connection = await Connection.create(browserWSEndpoint);
return new Browser(connection, !!ignoreHTTPSErrors);
}
}
/**
* @param {!ChildProcess} chromeProcess
* @return {!Promise<string>}
*/
function waitForWSEndpoint(chromeProcess) {
return new Promise(fulfill => {
const rl = readline.createInterface({ input: chromeProcess.stderr });
rl.on('line', onLine);
rl.once('close', () => fulfill(''));
/**
* @param {string} line
*/
function onLine(line) {
const match = line.match(/^DevTools listening on (ws:\/\/.*)$/);
if (!match)
return;
rl.removeListener('line', onLine);
fulfill(match[1]);
}
});
}
module.exports = Launcher;