forked from browserstack/selenium-webdriver-nodejs
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chrome.js
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chrome.js
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// Copyright 2013 Selenium committers
// Copyright 2013 Software Freedom Conservancy
//
// 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.
'use strict';
var fs = require('fs'),
util = require('util');
var webdriver = require('./index'),
executors = require('./executors'),
io = require('./io'),
portprober = require('./net/portprober'),
remote = require('./remote');
/**
* Name of the ChromeDriver executable.
* @type {string}
* @const
*/
var CHROMEDRIVER_EXE =
process.platform === 'win32' ? 'chromedriver.exe' : 'chromedriver';
/**
* Creates {@link remote.DriverService} instances that manage a ChromeDriver
* server.
* @param {string=} opt_exe Path to the server executable to use. If omitted,
* the builder will attempt to locate the chromedriver on the current
* PATH.
* @throws {Error} If provided executable does not exist, or the chromedriver
* cannot be found on the PATH.
* @constructor
*/
var ServiceBuilder = function(opt_exe) {
/** @private {string} */
this.exe_ = opt_exe || io.findInPath(CHROMEDRIVER_EXE, true);
if (!this.exe_) {
throw Error(
'The ChromeDriver could not be found on the current PATH. Please ' +
'download the latest version of the ChromeDriver from ' +
'http://chromedriver.storage.googleapis.com/index.html and ensure ' +
'it can be found on your PATH.');
}
if (!fs.existsSync(this.exe_)) {
throw Error('File does not exist: ' + this.exe_);
}
/** @private {!Array.<string>} */
this.args_ = [];
this.stdio_ = 'ignore';
};
/** @private {number} */
ServiceBuilder.prototype.port_ = 0;
/** @private {(string|!Array.<string|number|!Stream|null|undefined>)} */
ServiceBuilder.prototype.stdio_ = 'ignore';
/** @private {Object.<string, string>} */
ServiceBuilder.prototype.env_ = null;
/**
* Sets the port to start the ChromeDriver on.
* @param {number} port The port to use, or 0 for any free port.
* @return {!ServiceBuilder} A self reference.
* @throws {Error} If the port is invalid.
*/
ServiceBuilder.prototype.usingPort = function(port) {
if (port < 0) {
throw Error('port must be >= 0: ' + port);
}
this.port_ = port;
return this;
};
/**
* Sets the path of the log file the driver should log to. If a log file is
* not specified, the driver will log to stderr.
* @param {string} path Path of the log file to use.
* @return {!ServiceBuilder} A self reference.
*/
ServiceBuilder.prototype.loggingTo = function(path) {
this.args_.push('--log-path=' + path);
return this;
};
/**
* Enables verbose logging.
* @return {!ServiceBuilder} A self reference.
*/
ServiceBuilder.prototype.enableVerboseLogging = function() {
this.args_.push('--verbose');
return this;
};
/**
* Sets the number of threads the driver should use to manage HTTP requests.
* By default, the driver will use 4 threads.
* @param {number} n The number of threads to use.
* @return {!ServiceBuilder} A self reference.
*/
ServiceBuilder.prototype.setNumHttpThreads = function(n) {
this.args_.push('--http-threads=' + n);
return this;
};
/**
* Sets the base path for WebDriver REST commands (e.g. "/wd/hub").
* By default, the driver will accept commands relative to "/".
* @param {string} path The base path to use.
* @return {!ServiceBuilder} A self reference.
*/
ServiceBuilder.prototype.setUrlBasePath = function(path) {
this.args_.push('--url-base=' + path);
return this;
};
/**
* Defines the stdio configuration for the driver service. See
* {@code child_process.spawn} for more information.
* @param {(string|!Array.<string|number|!Stream|null|undefined>)} config The
* configuration to use.
* @return {!ServiceBuilder} A self reference.
*/
ServiceBuilder.prototype.setStdio = function(config) {
this.stdio_ = config;
return this;
};
/**
* Defines the environment to start the server under. This settings will be
* inherited by every browser session started by the server.
* @param {!Object.<string, string>} env The environment to use.
* @return {!ServiceBuilder} A self reference.
*/
ServiceBuilder.prototype.withEnvironment = function(env) {
this.env_ = env;
return this;
};
/**
* Creates a new DriverService using this instance's current configuration.
* @return {remote.DriverService} A new driver service using this instance's
* current configuration.
* @throws {Error} If the driver exectuable was not specified and a default
* could not be found on the current PATH.
*/
ServiceBuilder.prototype.build = function() {
var port = this.port_ || portprober.findFreePort();
var args = this.args_.concat(); // Defensive copy.
return new remote.DriverService(this.exe_, {
loopback: true,
port: port,
args: webdriver.promise.when(port, function(port) {
return args.concat('--port=' + port);
}),
env: this.env_,
stdio: this.stdio_
});
};
/** @type {remote.DriverService} */
var defaultService = null;
/**
* Sets the default service to use for new ChromeDriver instances.
* @param {!remote.DriverService} service The service to use.
* @throws {Error} If the default service is currently running.
*/
function setDefaultService(service) {
if (defaultService && defaultService.isRunning()) {
throw Error(
'The previously configured ChromeDriver service is still running. ' +
'You must shut it down before you may adjust its configuration.');
}
defaultService = service;
}
/**
* Returns the default ChromeDriver service. If such a service has not been
* configured, one will be constructed using the default configuration for
* a ChromeDriver executable found on the system PATH.
* @return {!remote.DriverService} The default ChromeDriver service.
*/
function getDefaultService() {
if (!defaultService) {
defaultService = new ServiceBuilder().build();
}
return defaultService;
}
/**
* @type {string}
* @const
*/
var OPTIONS_CAPABILITY_KEY = 'chromeOptions';
/**
* Class for managing ChromeDriver specific options.
* @constructor
*/
var Options = function() {
/** @private {!Array.<string>} */
this.args_ = [];
/** @private {!Array.<(string|!Buffer)>} */
this.extensions_ = [];
};
/**
* Extracts the ChromeDriver specific options from the given capabilities
* object.
* @param {!webdriver.Capabilities} capabilities The capabilities object.
* @return {!Options} The ChromeDriver options.
*/
Options.fromCapabilities = function(capabilities) {
var options = new Options();
var o = capabilities.get(OPTIONS_CAPABILITY_KEY);
if (o instanceof Options) {
options = o;
} else if (o) {
options.
addArguments(o.args || []).
addExtensions(o.extensions || []).
detachDriver(!!o.detach).
setChromeBinaryPath(o.binary).
setChromeLogFile(o.logFile).
setLocalState(o.localState).
setUserPreferences(o.prefs);
}
if (capabilities.has(webdriver.Capability.PROXY)) {
options.setProxy(capabilities.get(webdriver.Capability.PROXY));
}
if (capabilities.has(webdriver.Capability.LOGGING_PREFS)) {
options.setLoggingPrefs(
capabilities.get(webdriver.Capability.LOGGING_PREFS));
}
return options;
};
/**
* Add additional command line arguments to use when launching the Chrome
* browser. Each argument may be specified with or without the "--" prefix
* (e.g. "--foo" and "foo"). Arguments with an associated value should be
* delimited by an "=": "foo=bar".
* @param {...(string|!Array.<string>)} var_args The arguments to add.
* @return {!Options} A self reference.
*/
Options.prototype.addArguments = function(var_args) {
this.args_ = this.args_.concat.apply(this.args_, arguments);
return this;
};
/**
* Add additional extensions to install when launching Chrome. Each extension
* should be specified as the path to the packed CRX file, or a Buffer for an
* extension.
* @param {...(string|!Buffer|!Array.<(string|!Buffer)>)} var_args The
* extensions to add.
* @return {!Options} A self reference.
*/
Options.prototype.addExtensions = function(var_args) {
this.extensions_ = this.extensions_.concat.apply(
this.extensions_, arguments);
return this;
};
/**
* Sets the path to the Chrome binary to use. On Mac OS X, this path should
* reference the actual Chrome executable, not just the application binary
* (e.g. "/Applications/Google Chrome.app/Contents/MacOS/Google Chrome").
*
* The binary path be absolute or relative to the chromedriver server
* executable, but it must exist on the machine that will launch Chrome.
*
* @param {string} path The path to the Chrome binary to use.
* @return {!Options} A self reference.
*/
Options.prototype.setChromeBinaryPath = function(path) {
this.binary_ = path;
return this;
};
/**
* Sets whether to leave the started Chrome browser running if the controlling
* ChromeDriver service is killed before {@link webdriver.WebDriver#quit()} is
* called.
* @param {boolean} detach Whether to leave the browser running if the
* chromedriver service is killed before the session.
* @return {!Options} A self reference.
*/
Options.prototype.detachDriver = function(detach) {
this.detach_ = detach;
return this;
};
/**
* Sets the user preferences for Chrome's user profile. See the "Preferences"
* file in Chrome's user data directory for examples.
* @param {!Object} prefs Dictionary of user preferences to use.
* @return {!Options} A self reference.
*/
Options.prototype.setUserPreferences = function(prefs) {
this.prefs_ = prefs;
return this;
};
/**
* Sets the logging preferences for the new session.
* @param {!webdriver.logging.Preferences} prefs The logging preferences.
* @return {!Options} A self reference.
*/
Options.prototype.setLoggingPrefs = function(prefs) {
this.logPrefs_ = prefs;
return this;
};
/**
* Sets preferences for the "Local State" file in Chrome's user data
* directory.
* @param {!Object} state Dictionary of local state preferences.
* @return {!Options} A self reference.
*/
Options.prototype.setLocalState = function(state) {
this.localState_ = state;
return this;
};
/**
* Sets the path to Chrome's log file. This path should exist on the machine
* that will launch Chrome.
* @param {string} path Path to the log file to use.
* @return {!Options} A self reference.
*/
Options.prototype.setChromeLogFile = function(path) {
this.logFile_ = path;
return this;
};
/**
* Sets the proxy settings for the new session.
* @param {webdriver.ProxyConfig} proxy The proxy configuration to use.
* @return {!Options} A self reference.
*/
Options.prototype.setProxy = function(proxy) {
this.proxy_ = proxy;
return this;
};
/**
* Converts this options instance to a {@link webdriver.Capabilities} object.
* @param {webdriver.Capabilities=} opt_capabilities The capabilities to merge
* these options into, if any.
* @return {!webdriver.Capabilities} The capabilities.
*/
Options.prototype.toCapabilities = function(opt_capabilities) {
var capabilities = opt_capabilities || webdriver.Capabilities.chrome();
capabilities.
set(webdriver.Capability.PROXY, this.proxy_).
set(webdriver.Capability.LOGGING_PREFS, this.logPrefs_).
set(OPTIONS_CAPABILITY_KEY, this);
return capabilities;
};
/**
* Converts this instance to its JSON wire protocol representation. Note this
* function is an implementation not intended for general use.
* @return {{args: !Array.<string>,
* binary: (string|undefined),
* detach: boolean,
* extensions: !Array.<string>,
* localState: (Object|undefined),
* logFile: (string|undefined),
* prefs: (Object|undefined)}} The JSON wire protocol representation
* of this instance.
*/
Options.prototype.toJSON = function() {
return {
args: this.args_,
binary: this.binary_,
detach: !!this.detach_,
extensions: this.extensions_.map(function(extension) {
if (Buffer.isBuffer(extension)) {
return extension.toString('base64');
}
return fs.readFileSync(extension, 'base64');
}),
localState: this.localState_,
logFile: this.logFile_,
prefs: this.prefs_
};
};
/**
* Creates a new ChromeDriver session.
* @param {(webdriver.Capabilities|Options)=} opt_options The session options.
* @param {remote.DriverService=} opt_service The session to use; will use
* the {@link getDefaultService default service} by default.
* @param {webdriver.promise.ControlFlow=} opt_flow The control flow to use, or
* {@code null} to use the currently active flow.
* @return {!webdriver.WebDriver} A new WebDriver instance.
* @deprecated Use {@link Driver new Driver()}.
*/
function createDriver(opt_options, opt_service, opt_flow) {
return new Driver(opt_options, opt_service, opt_flow);
}
/**
* Creates a new WebDriver client for Chrome.
*
* @param {(webdriver.Capabilities|Options)=} opt_config The configuration
* options.
* @param {remote.DriverService=} opt_service The session to use; will use
* the {@link getDefaultService default service} by default.
* @param {webdriver.promise.ControlFlow=} opt_flow The control flow to use, or
* {@code null} to use the currently active flow.
* @constructor
* @extends {webdriver.WebDriver}
*/
var Driver = function(opt_config, opt_service, opt_flow) {
var service = opt_service || getDefaultService();
var executor = executors.createExecutor(service.start());
var capabilities =
opt_config instanceof Options ? opt_config.toCapabilities() :
(opt_config || webdriver.Capabilities.chrome());
var driver = webdriver.WebDriver.createSession(
executor, capabilities, opt_flow);
webdriver.WebDriver.call(
this, driver.getSession(), executor, driver.controlFlow());
};
util.inherits(Driver, webdriver.WebDriver);
// PUBLIC API
exports.Driver = Driver;
exports.Options = Options;
exports.ServiceBuilder = ServiceBuilder;
exports.createDriver = createDriver;
exports.getDefaultService = getDefaultService;
exports.setDefaultService = setDefaultService;