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 os = require('os');
const path = require('path');
const removeFolder = require('rimraf');
const childProcess = require('child_process');
const BrowserFetcher = require('./BrowserFetcher');
const {Connection} = require('./Connection');
const {Browser} = require('./Browser');
const readline = require('readline');
const fs = require('fs');
const {helper, debugError} = require('./helper');
const {TimeoutError} = require('./Errors');
const WebSocketTransport = require('./WebSocketTransport');
const PipeTransport = require('./PipeTransport');
const mkdtempAsync = helper.promisify(fs.mkdtemp);
const removeFolderAsync = helper.promisify(removeFolder);
const CHROME_PROFILE_PATH = path.join(os.tmpdir(), 'puppeteer_dev_profile-');
const DEFAULT_ARGS = [
'--disable-background-networking',
'--enable-features=NetworkService,NetworkServiceInProcess',
'--disable-background-timer-throttling',
'--disable-backgrounding-occluded-windows',
'--disable-breakpad',
'--disable-client-side-phishing-detection',
'--disable-default-apps',
'--disable-dev-shm-usage',
'--disable-extensions',
// TODO: Support OOOPIF. @see https://github.com/GoogleChrome/puppeteer/issues/2548
'--disable-features=site-per-process',
'--disable-hang-monitor',
'--disable-ipc-flooding-protection',
'--disable-popup-blocking',
'--disable-prompt-on-repost',
'--disable-renderer-backgrounding',
'--disable-sync',
'--disable-translate',
'--force-color-profile=srgb',
'--metrics-recording-only',
'--no-first-run',
'--safebrowsing-disable-auto-update',
'--enable-automation',
'--password-store=basic',
'--use-mock-keychain',
];
class Launcher {
/**
* @param {string} projectRoot
* @param {string} preferredRevision
* @param {boolean} isPuppeteerCore
*/
constructor(projectRoot, preferredRevision, isPuppeteerCore) {
this._projectRoot = projectRoot;
this._preferredRevision = preferredRevision;
this._isPuppeteerCore = isPuppeteerCore;
}
/**
* @param {!(Launcher.LaunchOptions & Launcher.ChromeArgOptions & Launcher.BrowserOptions)=} options
* @return {!Promise<!Browser>}
*/
async launch(options = {}) {
const {
ignoreDefaultArgs = false,
args = [],
dumpio = false,
executablePath = null,
pipe = false,
env = process.env,
handleSIGINT = true,
handleSIGTERM = true,
handleSIGHUP = true,
ignoreHTTPSErrors = false,
defaultViewport = {width: 800, height: 600},
slowMo = 0,
timeout = 30000
} = options;
const chromeArguments = [];
if (!ignoreDefaultArgs)
chromeArguments.push(...this.defaultArgs(options));
else if (Array.isArray(ignoreDefaultArgs))
chromeArguments.push(...this.defaultArgs(options).filter(arg => ignoreDefaultArgs.indexOf(arg) === -1));
else
chromeArguments.push(...args);
let temporaryUserDataDir = null;
if (!chromeArguments.some(argument => argument.startsWith('--remote-debugging-')))
chromeArguments.push(pipe ? '--remote-debugging-pipe' : '--remote-debugging-port=0');
if (!chromeArguments.some(arg => arg.startsWith('--user-data-dir'))) {
temporaryUserDataDir = await mkdtempAsync(CHROME_PROFILE_PATH);
chromeArguments.push(`--user-data-dir=${temporaryUserDataDir}`);
}
let chromeExecutable = executablePath;
if (!executablePath) {
const {missingText, executablePath} = this._resolveExecutablePath();
if (missingText)
throw new Error(missingText);
chromeExecutable = executablePath;
}
const usePipe = chromeArguments.includes('--remote-debugging-pipe');
/** @type {!Array<"ignore"|"pipe">} */
const stdio = usePipe ? ['ignore', 'ignore', 'ignore', 'pipe', 'pipe'] : ['pipe', 'pipe', 'pipe'];
const chromeProcess = childProcess.spawn(
chromeExecutable,
chromeArguments,
{
// On non-windows platforms, `detached: false` makes child process a leader of a new
// process group, making it possible to kill child process tree with `.kill(-pid)` command.
// @see https://nodejs.org/api/child_process.html#child_process_options_detached
detached: process.platform !== 'win32',
env,
stdio
}
);
if (dumpio) {
chromeProcess.stderr.pipe(process.stderr);
chromeProcess.stdout.pipe(process.stdout);
}
let chromeClosed = false;
const waitForChromeToClose = new Promise((fulfill, reject) => {
chromeProcess.once('exit', () => {
chromeClosed = true;
// Cleanup as processes exit.
if (temporaryUserDataDir) {
removeFolderAsync(temporaryUserDataDir)
.then(() => fulfill())
.catch(err => console.error(err));
} else {
fulfill();
}
});
});
const listeners = [ helper.addEventListener(process, 'exit', killChrome) ];
if (handleSIGINT)
listeners.push(helper.addEventListener(process, 'SIGINT', () => { killChrome(); process.exit(130); }));
if (handleSIGTERM)
listeners.push(helper.addEventListener(process, 'SIGTERM', gracefullyCloseChrome));
if (handleSIGHUP)
listeners.push(helper.addEventListener(process, 'SIGHUP', gracefullyCloseChrome));
/** @type {?Connection} */
let connection = null;
try {
if (!usePipe) {
const browserWSEndpoint = await waitForWSEndpoint(chromeProcess, timeout, this._preferredRevision);
const transport = await WebSocketTransport.create(browserWSEndpoint);
connection = new Connection(browserWSEndpoint, transport, slowMo);
} else {
const transport = new PipeTransport(/** @type {!NodeJS.WritableStream} */(chromeProcess.stdio[3]), /** @type {!NodeJS.ReadableStream} */ (chromeProcess.stdio[4]));
connection = new Connection('', transport, slowMo);
}
const browser = await Browser.create(connection, [], ignoreHTTPSErrors, defaultViewport, chromeProcess, gracefullyCloseChrome);
await ensureInitialPage(browser);
return browser;
} catch (e) {
killChrome();
throw e;
}
/**
* @param {!Browser} browser
*/
async function ensureInitialPage(browser) {
// Wait for initial page target to be created.
if (browser.targets().find(target => target.type() === 'page'))
return;
let initialPageCallback;
const initialPagePromise = new Promise(resolve => initialPageCallback = resolve);
const listeners = [helper.addEventListener(browser, 'targetcreated', target => {
if (target.type() === 'page')
initialPageCallback();
})];
await initialPagePromise;
helper.removeEventListeners(listeners);
}
/**
* @return {Promise}
*/
function gracefullyCloseChrome() {
helper.removeEventListeners(listeners);
if (temporaryUserDataDir) {
killChrome();
} else if (connection) {
// Attempt to close chrome gracefully
connection.send('Browser.close').catch(error => {
debugError(error);
killChrome();
});
}
return waitForChromeToClose;
}
// This method has to be sync to be used as 'exit' event handler.
function killChrome() {
helper.removeEventListeners(listeners);
if (chromeProcess.pid && !chromeProcess.killed && !chromeClosed) {
// Force kill chrome.
try {
if (process.platform === 'win32')
childProcess.execSync(`taskkill /pid ${chromeProcess.pid} /T /F`);
else
process.kill(-chromeProcess.pid, 'SIGKILL');
} catch (e) {
// the process might have already stopped
}
}
// Attempt to remove temporary profile directory to avoid littering.
try {
removeFolder.sync(temporaryUserDataDir);
} catch (e) { }
}
}
/**
* @param {!Launcher.ChromeArgOptions=} options
* @return {!Array<string>}
*/
defaultArgs(options = {}) {
const {
devtools = false,
headless = !devtools,
args = [],
userDataDir = null
} = options;
const chromeArguments = [...DEFAULT_ARGS];
if (userDataDir)
chromeArguments.push(`--user-data-dir=${userDataDir}`);
if (devtools)
chromeArguments.push('--auto-open-devtools-for-tabs');
if (headless) {
chromeArguments.push(
'--headless',
'--hide-scrollbars',
'--mute-audio'
);
if (os.platform() === 'win32')
chromeArguments.push('--disable-gpu');
}
if (args.every(arg => arg.startsWith('-')))
chromeArguments.push('about:blank');
chromeArguments.push(...args);
return chromeArguments;
}
/**
* @return {string}
*/
executablePath() {
return this._resolveExecutablePath().executablePath;
}
/**
* @param {!(Launcher.BrowserOptions & {browserWSEndpoint: string, transport?: !Puppeteer.ConnectionTransport})} options
* @return {!Promise<!Browser>}
*/
async connect(options) {
const {
browserWSEndpoint,
ignoreHTTPSErrors = false,
defaultViewport = {width: 800, height: 600},
transport = await WebSocketTransport.create(browserWSEndpoint),
slowMo = 0,
} = options;
const connection = new Connection(browserWSEndpoint, transport, slowMo);
const {browserContextIds} = await connection.send('Target.getBrowserContexts');
return Browser.create(connection, browserContextIds, ignoreHTTPSErrors, defaultViewport, null, () => connection.send('Browser.close').catch(debugError));
}
/**
* @return {{executablePath: string, missingText: ?string}}
*/
_resolveExecutablePath() {
const browserFetcher = new BrowserFetcher(this._projectRoot);
// puppeteer-core doesn't take into account PUPPETEER_* env variables.
if (!this._isPuppeteerCore) {
const executablePath = process.env['PUPPETEER_EXECUTABLE_PATH'];
if (executablePath) {
const missingText = !fs.existsSync(executablePath) ? 'Tried to use PUPPETEER_EXECUTABLE_PATH env variable to launch browser but did not find any executable at: ' + executablePath : null;
return { executablePath, missingText };
}
const revision = process.env['PUPPETEER_CHROMIUM_REVISION'];
if (revision) {
const revisionInfo = browserFetcher.revisionInfo(revision);
const missingText = !revisionInfo.local ? 'Tried to use PUPPETEER_CHROMIUM_REVISION env variable to launch browser but did not find executable at: ' + revisionInfo.executablePath : null;
return {executablePath: revisionInfo.executablePath, missingText};
}
}
const revisionInfo = browserFetcher.revisionInfo(this._preferredRevision);
const missingText = !revisionInfo.local ? `Chromium revision is not downloaded. Run "npm install" or "yarn install"` : null;
return {executablePath: revisionInfo.executablePath, missingText};
}
}
/**
* @param {!Puppeteer.ChildProcess} chromeProcess
* @param {number} timeout
* @param {string} preferredRevision
* @return {!Promise<string>}
*/
function waitForWSEndpoint(chromeProcess, timeout, preferredRevision) {
return new Promise((resolve, reject) => {
const rl = readline.createInterface({ input: chromeProcess.stderr });
let stderr = '';
const listeners = [
helper.addEventListener(rl, 'line', onLine),
helper.addEventListener(rl, 'close', () => onClose()),
helper.addEventListener(chromeProcess, 'exit', () => onClose()),
helper.addEventListener(chromeProcess, 'error', error => onClose(error))
];
const timeoutId = timeout ? setTimeout(onTimeout, timeout) : 0;
/**
* @param {!Error=} error
*/
function onClose(error) {
cleanup();
reject(new Error([
'Failed to launch chrome!' + (error ? ' ' + error.message : ''),
stderr,
'',
'TROUBLESHOOTING: https://github.com/GoogleChrome/puppeteer/blob/master/docs/troubleshooting.md',
'',
].join('\n')));
}
function onTimeout() {
cleanup();
reject(new TimeoutError(`Timed out after ${timeout} ms while trying to connect to Chrome! The only Chrome revision guaranteed to work is r${preferredRevision}`));
}
/**
* @param {string} line
*/
function onLine(line) {
stderr += line + '\n';
const match = line.match(/^DevTools listening on (ws:\/\/.*)$/);
if (!match)
return;
cleanup();
resolve(match[1]);
}
function cleanup() {
if (timeoutId)
clearTimeout(timeoutId);
helper.removeEventListeners(listeners);
}
});
}
/**
* @typedef {Object} Launcher.ChromeArgOptions
* @property {boolean=} headless
* @property {Array<string>=} args
* @property {string=} userDataDir
* @property {boolean=} devtools
*/
/**
* @typedef {Object} Launcher.LaunchOptions
* @property {string=} executablePath
* @property {boolean|Array<string>=} ignoreDefaultArgs
* @property {boolean=} handleSIGINT
* @property {boolean=} handleSIGTERM
* @property {boolean=} handleSIGHUP
* @property {number=} timeout
* @property {boolean=} dumpio
* @property {!Object<string, string | undefined>=} env
* @property {boolean=} pipe
*/
/**
* @typedef {Object} Launcher.BrowserOptions
* @property {boolean=} ignoreHTTPSErrors
* @property {(?Puppeteer.Viewport)=} defaultViewport
* @property {number=} slowMo
*/
module.exports = Launcher;