puppeteer/experimental/puppeteer-firefox/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 {Connection} = require('./Connection');
const {Browser} = require('./Browser');
const {BrowserFetcher} = require('./BrowserFetcher');
const readline = require('readline');
const fs = require('fs');
const util = require('util');
const {helper, debugError} = require('./helper');
const {TimeoutError} = require('./Errors')
const WebSocketTransport = require('./WebSocketTransport');
const mkdtempAsync = util.promisify(fs.mkdtemp);
const removeFolderAsync = util.promisify(removeFolder);
const tmpDir = () => process.env.PUPPETEER_TMP_DIR || os.tmpdir();
const FIREFOX_PROFILE_PATH = path.join(tmpDir(), 'puppeteer_firefox_profile-');
const DEFAULT_ARGS = [
'-no-remote',
'-foreground',
];
/**
* @internal
*/
class Launcher {
constructor(projectRoot, preferredRevision) {
this._projectRoot = projectRoot;
this._preferredRevision = preferredRevision;
}
defaultArgs(options = {}) {
const {
headless = true,
args = [],
userDataDir = null,
} = options;
const firefoxArguments = [...DEFAULT_ARGS];
if (userDataDir)
firefoxArguments.push('-profile', userDataDir);
if (headless)
firefoxArguments.push('-headless');
firefoxArguments.push(...args);
if (args.every(arg => arg.startsWith('-')))
firefoxArguments.push('about:blank');
return firefoxArguments;
}
/**
* @param {Object} options
* @return {!Promise<!Browser>}
*/
async launch(options = {}) {
const {
ignoreDefaultArgs = false,
args = [],
dumpio = false,
executablePath = null,
env = process.env,
handleSIGHUP = true,
handleSIGINT = true,
handleSIGTERM = true,
ignoreHTTPSErrors = false,
headless = true,
defaultViewport = {width: 800, height: 600},
slowMo = 0,
timeout = 30000,
} = options;
const firefoxArguments = [];
if (!ignoreDefaultArgs)
firefoxArguments.push(...this.defaultArgs(options));
else if (Array.isArray(ignoreDefaultArgs))
firefoxArguments.push(...this.defaultArgs(options).filter(arg => !ignoreDefaultArgs.includes(arg)));
else
firefoxArguments.push(...args);
if (!firefoxArguments.includes('-juggler'))
firefoxArguments.push('-juggler', '0');
let temporaryProfileDir = null;
if (!firefoxArguments.includes('-profile') && !firefoxArguments.includes('--profile')) {
temporaryProfileDir = await mkdtempAsync(FIREFOX_PROFILE_PATH);
firefoxArguments.push(`-profile`, temporaryProfileDir);
}
let firefoxExecutable = executablePath;
if (!firefoxExecutable) {
const {missingText, executablePath} = this._resolveExecutablePath();
if (missingText)
throw new Error(missingText);
firefoxExecutable = executablePath;
}
const stdio = ['pipe', 'pipe', 'pipe'];
const firefoxProcess = childProcess.spawn(
firefoxExecutable,
firefoxArguments,
{
// 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',
stdio,
// On linux Juggler ships the libstdc++ it was linked against.
env: os.platform() === 'linux' ? {
...env,
LD_LIBRARY_PATH: `${path.dirname(firefoxExecutable)}:${process.env.LD_LIBRARY_PATH}`,
} : env,
}
);
if (dumpio) {
firefoxProcess.stderr.pipe(process.stderr);
firefoxProcess.stdout.pipe(process.stdout);
}
let firefoxClosed = false;
const waitForFirefoxToClose = new Promise((fulfill, reject) => {
firefoxProcess.once('exit', () => {
firefoxClosed = true;
// Cleanup as processes exit.
if (temporaryProfileDir) {
removeFolderAsync(temporaryProfileDir)
.then(() => fulfill())
.catch(err => console.error(err));
} else {
fulfill();
}
});
});
const listeners = [ helper.addEventListener(process, 'exit', killFirefox) ];
if (handleSIGINT)
listeners.push(helper.addEventListener(process, 'SIGINT', () => { killFirefox(); process.exit(130); }));
if (handleSIGTERM)
listeners.push(helper.addEventListener(process, 'SIGTERM', gracefullyCloseFirefox));
if (handleSIGHUP)
listeners.push(helper.addEventListener(process, 'SIGHUP', gracefullyCloseFirefox));
/** @type {?Connection} */
let connection = null;
try {
const url = await waitForWSEndpoint(firefoxProcess, timeout);
const transport = await WebSocketTransport.create(url);
connection = new Connection(url, transport, slowMo);
const browser = await Browser.create(connection, defaultViewport, firefoxProcess, gracefullyCloseFirefox);
if (ignoreHTTPSErrors)
await connection.send('Browser.setIgnoreHTTPSErrors', {enabled: true});
await browser.waitForTarget(t => t.type() === 'page');
return browser;
} catch (e) {
killFirefox();
throw e;
}
function gracefullyCloseFirefox() {
helper.removeEventListeners(listeners);
if (temporaryProfileDir) {
killFirefox();
} else if (connection) {
connection.send('Browser.close').catch(error => {
debugError(error);
killFirefox();
});
}
return waitForFirefoxToClose;
}
// This method has to be sync to be used as 'exit' event handler.
function killFirefox() {
helper.removeEventListeners(listeners);
if (firefoxProcess.pid && !firefoxProcess.killed && !firefoxClosed) {
// Force kill chrome.
try {
if (process.platform === 'win32')
childProcess.execSync(`taskkill /pid ${firefoxProcess.pid} /T /F`);
else
process.kill(-firefoxProcess.pid, 'SIGKILL');
} catch (e) {
// the process might have already stopped
}
}
// Attempt to remove temporary profile directory to avoid littering.
try {
removeFolder.sync(temporaryProfileDir);
} catch (e) { }
}
}
/**
* @param {Object} options
* @return {!Promise<!Browser>}
*/
async connect(options = {}) {
const {
browserWSEndpoint,
slowMo = 0,
defaultViewport = {width: 800, height: 600},
ignoreHTTPSErrors = false,
} = options;
let connection = null;
const transport = await WebSocketTransport.create(browserWSEndpoint);
connection = new Connection(browserWSEndpoint, transport, slowMo);
const browser = await Browser.create(connection, defaultViewport, null, () => connection.send('Browser.close').catch(debugError));
if (ignoreHTTPSErrors)
await connection.send('Browser.setIgnoreHTTPSErrors', {enabled: true});
return browser;
}
/**
* @return {string}
*/
executablePath() {
return this._resolveExecutablePath().executablePath;
}
_resolveExecutablePath() {
const downloadPath = process.env.PUPPETEER_DOWNLOAD_PATH ||
process.env.npm_config_puppeteer_download_path ||
process.env.npm_package_config_puppeteer_download_path;
const browserFetcher = new BrowserFetcher(this._projectRoot, { product: 'firefox', path: downloadPath });
const revisionInfo = browserFetcher.revisionInfo(this._preferredRevision);
const missingText = !revisionInfo.local ? `Firefox revision is not downloaded. Run "npm install" or "yarn install"` : null;
return {executablePath: revisionInfo.executablePath, missingText};
}
}
/**
* @param {!Puppeteer.ChildProcess} firefoxProcess
* @param {number} timeout
* @return {!Promise<string>}
*/
function waitForWSEndpoint(firefoxProcess, timeout) {
return new Promise((resolve, reject) => {
const rl = readline.createInterface({ input: firefoxProcess.stdout });
let stderr = '';
const listeners = [
helper.addEventListener(rl, 'line', onLine),
helper.addEventListener(rl, 'close', () => onClose()),
helper.addEventListener(firefoxProcess, 'exit', () => onClose()),
helper.addEventListener(firefoxProcess, 'error', error => onClose(error))
];
const timeoutId = timeout ? setTimeout(onTimeout, timeout) : 0;
/**
* @param {!Error=} error
*/
function onClose(error) {
cleanup();
reject(new Error([
'Failed to launch Firefox!' + (error ? ' ' + error.message : ''),
stderr,
'',
].join('\n')));
}
function onTimeout() {
cleanup();
reject(new TimeoutError(`Timed out after ${timeout} ms while trying to connect to Firefox!`));
}
/**
* @param {string} line
*/
function onLine(line) {
stderr += line + '\n';
const match = line.match(/^Juggler listening on (ws:\/\/.*)$/);
if (!match)
return;
cleanup();
resolve(match[1]);
}
function cleanup() {
if (timeoutId)
clearTimeout(timeoutId);
helper.removeEventListeners(listeners);
}
});
}
module.exports = {Launcher};