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Selenium automates browsers. That's it! What you do with that power is entirely up to you.
// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The SFC licenses this file
// to you 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.
package org.openqa.selenium.remote.server;
import com.beust.jcommander.JCommander;
import org.openqa.grid.internal.utils.configuration.StandaloneConfiguration;
import org.openqa.grid.shared.GridNodeServer;
import org.openqa.grid.web.servlet.DisplayHelpServlet;
import org.openqa.grid.web.servlet.beta.ConsoleServlet;
import org.openqa.selenium.Platform;
import org.openqa.selenium.remote.SessionId;
import org.openqa.selenium.remote.server.handler.DeleteSession;
import org.seleniumhq.jetty9.security.ConstraintMapping;
import org.seleniumhq.jetty9.security.ConstraintSecurityHandler;
import org.seleniumhq.jetty9.server.Connector;
import org.seleniumhq.jetty9.server.HttpConfiguration;
import org.seleniumhq.jetty9.server.HttpConnectionFactory;
import org.seleniumhq.jetty9.server.Server;
import org.seleniumhq.jetty9.server.ServerConnector;
import org.seleniumhq.jetty9.servlet.ServletContextHandler;
import org.seleniumhq.jetty9.util.security.Constraint;
import org.seleniumhq.jetty9.util.thread.QueuedThreadPool;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.logging.Logger;
import javax.servlet.Servlet;
/**
* Provides a server that can launch and manage selenium sessions.
*/
public class SeleniumServer implements GridNodeServer {
private final static Logger LOG = Logger.getLogger(SeleniumServer.class.getName());
private Server server;
private DefaultDriverSessions driverSessions;
private StandaloneConfiguration configuration;
private Map> extraServlets;
private Thread shutDownHook;
/**
* This lock is very important to ensure that SeleniumServer and the underlying Jetty instance
* shuts down properly. It ensures that ProxyHandler does not add an SslRelay to the Jetty server
* dynamically (needed for SSL proxying) if the server has been shut down or is in the process of
* getting shut down.
*/
private final Object shutdownLock = new Object();
private static final int MAX_SHUTDOWN_RETRIES = 8;
public SeleniumServer(StandaloneConfiguration configuration) {
this.configuration = configuration;
}
public int getRealPort() {
if (server.isStarted()) {
ServerConnector socket = (ServerConnector)server.getConnectors()[0];
return socket.getPort();
}
return configuration.port;
}
private void addRcSupport(ServletContextHandler handler) {
try {
Class rcServlet = Class.forName(
"com.thoughtworks.selenium.webdriven.WebDriverBackedSeleniumServlet",
false,
getClass().getClassLoader())
.asSubclass(Servlet.class);
handler.addServlet(rcServlet, "/selenium-server/driver/");
LOG.info("Bound legacy RC support");
} catch (ClassNotFoundException e) {
// Do nothing.
}
}
private void addExtraServlets(ServletContextHandler handler) {
if (extraServlets != null && extraServlets.size() > 0) {
for (String path : extraServlets.keySet()) {
handler.addServlet(extraServlets.get(path), path);
}
}
}
public void setConfiguration(StandaloneConfiguration configuration) {
this.configuration = configuration;
}
public void setExtraServlets(Map> extraServlets) {
this.extraServlets = extraServlets;
}
public void boot() {
if (configuration.jettyMaxThreads != null && configuration.jettyMaxThreads > 0) {
server = new Server(new QueuedThreadPool(configuration.jettyMaxThreads));
} else {
server = new Server();
}
ServletContextHandler handler = new ServletContextHandler(ServletContextHandler.SECURITY);
if (configuration.browserTimeout != null && configuration.browserTimeout >= 0) {
handler.setInitParameter(DriverServlet.BROWSER_TIMEOUT_PARAMETER,
String.valueOf(configuration.browserTimeout));
}
long inactiveSessionTimeoutSeconds = configuration.timeout == null ?
Long.MAX_VALUE /1000 : configuration.timeout;
if (configuration.timeout != null && configuration.timeout >= 0) {
handler.setInitParameter(DriverServlet.SESSION_TIMEOUT_PARAMETER,
String.valueOf(configuration.timeout));
}
driverSessions = new DefaultDriverSessions(
new DefaultDriverFactory(Platform.getCurrent()),
TimeUnit.SECONDS.toMillis(inactiveSessionTimeoutSeconds));
handler.setAttribute(DriverServlet.SESSIONS_KEY, driverSessions);
handler.setContextPath("/");
if (configuration.enablePassThrough) {
LOG.info("Using the passthrough mode handler");
handler.addServlet(WebDriverServlet.class, "/wd/hub/*");
handler.addServlet(WebDriverServlet.class, "/webdriver/*");
} else {
handler.addServlet(DriverServlet.class, "/wd/hub/*");
handler.addServlet(DriverServlet.class, "/webdriver/*");
}
handler.setInitParameter(ConsoleServlet.CONSOLE_PATH_PARAMETER, "/wd/hub");
handler.setInitParameter(DisplayHelpServlet.HELPER_TYPE_PARAMETER, configuration.role);
addRcSupport(handler);
addExtraServlets(handler);
Constraint constraint = new Constraint();
constraint.setName("Disable TRACE");
constraint.setAuthenticate(true);
ConstraintMapping mapping = new ConstraintMapping();
mapping.setConstraint(constraint);
mapping.setMethod("TRACE");
mapping.setPathSpec("/");
ConstraintSecurityHandler securityHandler = (ConstraintSecurityHandler) handler.getSecurityHandler();
securityHandler.addConstraintMapping(mapping);
server.setHandler(handler);
HttpConfiguration httpConfig = new HttpConfiguration();
httpConfig.setSecureScheme("https");
ServerConnector http = new ServerConnector(server, new HttpConnectionFactory(httpConfig));
if (configuration.port == null) {
configuration.port = 4444;
}
http.setPort(configuration.port);
http.setIdleTimeout(500000);
server.setConnectors(new Connector[]{http});
try {
server.start();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private class ShutDownHook implements Runnable {
private final SeleniumServer selenium;
ShutDownHook(SeleniumServer selenium) {
this.selenium = selenium;
}
public void run() {
selenium.stop();
}
}
/**
* Stops the Jetty server
*/
public void stop() {
int numTries = 0;
Exception shutDownException = null;
// this may be called by a shutdown hook, or it may be called at any time
// in case it was called as an ordinary method, try to clean up the shutdown
// hook
try {
if (shutDownHook != null) {
Runtime.getRuntime().removeShutdownHook(shutDownHook);
}
} catch (IllegalStateException ignored) {
} // thrown if we're shutting down; that's OK
// shut down the jetty server (try try again)
while (numTries <= MAX_SHUTDOWN_RETRIES) {
++numTries;
try {
// see docs for the lock object for information on this and why it is IMPORTANT!
synchronized (shutdownLock) {
server.stop();
}
// If we reached here stop didnt throw an exception.
// So we assume it was successful.
break;
} catch (Exception ex) { // org.openqa.jetty.jetty.Server.stop() throws Exception
shutDownException = ex;
// If Exception is thrown we try to stop the jetty server again
}
}
// next, stop all of the browser sessions.
stopAllBrowsers();
if (numTries > MAX_SHUTDOWN_RETRIES) { // This is bad!! Jetty didnt shutdown..
if (null != shutDownException) {
throw new RuntimeException(shutDownException);
}
}
}
private void stopAllBrowsers() {
for (SessionId sessionId : driverSessions.getSessions()) {
Session session = driverSessions.get(sessionId);
DeleteSession deleteSession = new DeleteSession(session);
try {
deleteSession.call();
driverSessions.deleteSession(sessionId);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
public static void main(String[] argv) {
StandaloneConfiguration configuration = new StandaloneConfiguration();
JCommander jCommander = new JCommander(configuration, argv);
jCommander.setProgramName("selenium-3-server");
if (configuration.help) {
StringBuilder message = new StringBuilder();
jCommander.usage(message);
System.err.println(message.toString());
return;
}
SeleniumServer server = new SeleniumServer(configuration);
server.boot();
}
public static void usage(String msg) {
if (msg != null) {
System.out.println(msg);
}
StandaloneConfiguration args = new StandaloneConfiguration();
JCommander jCommander = new JCommander(args);
jCommander.usage();
}
}