import org.openqa.selenium.net.PortProber; //导入依赖的package包/类
@Override
public int startServer(TestSession session) throws ServerException {
    port = PortProber.findFreePort();
    String[] args = getArgs(port);
    if (LOG.isLoggable(Level.INFO)) {
        LOG.info(String.format("Spawning a Selenium server using the arguments [%s]", Arrays.toString(args)));
    }
    ProcessBuilder pb = new ProcessBuilder(getArgs(port));
    try {
        this.process = pb.start();
        return port;
    } catch (Exception e) {
        throw new ServerException(e.getMessage(), e);
    }
}
 

import org.openqa.selenium.net.PortProber; //导入依赖的package包/类
private int getCheckedAvailablePort(int configuredPort, String serverProtocol) {
    int actualPort;
    if (isAvailablePort(configuredPort)) {
        actualPort = configuredPort;
    } else {
        actualPort = PortProber.findFreePort();
        LOG.debug("Configured or default port = " + configuredPort + " for" + serverProtocol.toUpperCase() + " server is not available!!!");
        LOG.debug("Founded free port for " + serverProtocol.toUpperCase() + " is " + actualPort);
    }
    return actualPort;
}
 

import org.openqa.selenium.net.PortProber; //导入依赖的package包/类
public static HttpServer start(String pathToServe) throws IOException {
    HttpServer httpServer = HttpServer.create();
    httpServer.createContext("/", createHttpExchange(pathToServe));
    httpServer.bind(new InetSocketAddress("localhost", PortProber.findFreePort()), 0);
    httpServer.start();
    return httpServer;
}
 

import org.openqa.selenium.net.PortProber; //导入依赖的package包/类
@Before
public void beforeEachTest() throws IOException {
    httpServer = HttpServer.create();
    httpServer.createContext("/webdriverTest", httpExchange -> {
        String response = "Welcome Real's HowTo test page";
        httpExchange.sendResponseHeaders(200, response.length());
        OutputStream os = httpExchange.getResponseBody();
        os.write(response.getBytes());
        os.close();
    });
    httpServer.bind(new InetSocketAddress("localhost", PortProber.findFreePort()), 0);
    httpServer.start();
}
 

import org.openqa.selenium.net.PortProber; //导入依赖的package包/类
/**
 * Checks out the next available unused port. Callers should send the returned port
 * back to {@link #releaseUnusedPort(int)} when it's no longer being used.
 *
 * @throws NoSuchElementException if no unused port is available.
 */
public synchronized int checkOutUnusedPort() {
  if (availablePorts == null) {
    return PortProber.findFreePort();
  } else if (availablePorts.isEmpty()) {
    // All available ports are checked out.
    throw new NoSuchElementException("No unused ports are available");
  }
  return availablePorts.pop();
}
 

import org.openqa.selenium.net.PortProber; //导入依赖的package包/类
private static void foo() throws Exception {
    boolean debug = Boolean.parseBoolean(System.getProperty("debug", "false"));
    String dockerHost = String.format("http://%s:%d", CENTOS, 2375);
    DockerClient docker = null;
    try {
        docker = DefaultDockerClient.builder()
            .uri(dockerHost).build();
        Info info = docker.info();
        System.err.println("Information : " + info);
        if (debug) {
            docker.pull(SELENIUM_STANDALONE_CHROME, new LoggingBuildHandler());
        } else {
            docker.pull(SELENIUM_STANDALONE_CHROME);
        }
        final ImageInfo imageInfo = docker.inspectImage(SELENIUM_STANDALONE_CHROME);
        System.err.println("Information : " + imageInfo);
        // Bind container ports to host ports
        //            final String[] ports = {Integer.toString(PortProber.findFreePort())};
        final String[] ports = {"4444"};
        final Map<String, List<PortBinding>> portBindings = new HashMap<>();
        for (String port : ports) {
            List<PortBinding> hostPorts = new ArrayList<>();
            hostPorts.add(PortBinding.of("0.0.0.0", PortProber.findFreePort()));
            portBindings.put(port, hostPorts);
        }
        //            // Bind container port 443 to an automatically allocated available host port.
        //            List<PortBinding> randomPort = new ArrayList<>();
        //            randomPort.add(PortBinding.randomPort("0.0.0.0"));
        //            portBindings.put("443", randomPort);

        System.err.println("Printing the port mappings : " + portBindings);

        final HostConfig hostConfig = HostConfig.builder().portBindings(portBindings).build();

        final ContainerConfig containerConfig = ContainerConfig.builder()
            .hostConfig(hostConfig)
            .image(SELENIUM_STANDALONE_CHROME).exposedPorts(ports)
            .build();

        final ContainerCreation creation = docker.createContainer(containerConfig);
        final String id = creation.id();

        // Inspect container
        final ContainerInfo containerInfo = docker.inspectContainer(id);
        System.err.println("Container Information " + containerInfo);
        String msg = "Checking to see if the container with id [" + id + "] and name [" +
            containerInfo.name() + "]...";
        System.err.println(msg);
        if (! containerInfo.state().running()) {
            // Start container
            docker.startContainer(id);
            System.err.println(containerInfo.name() + " is now running.");
        } else {
            System.err.println(containerInfo.name() + " was already running.");
        }

        System.err.println("Lets wait here !!!");
    } finally {
        if (docker != null) {
            docker.close();
        }
    }
}
 

import org.openqa.selenium.net.PortProber; //导入依赖的package包/类
private static void createServer() {
    serverPort = PortProber.findFreePort();
    localIP = new NetworkUtils().getPrivateLocalAddress();
    initServer();
}
 

import org.openqa.selenium.net.PortProber; //导入依赖的package包/类
@Override
protected void before() throws Throwable {
    port=PortProber.findFreePort();
    log.info("found free port: {}",port);
}
 

import org.openqa.selenium.net.PortProber; //导入依赖的package包/类
public FirefoxProfile getDefaultFirefoxProfile() {
      FirefoxProfile profile = new FirefoxProfile();

      boolean generated = false;
      int newPort = 7055;
      int i = 100;
      while (!generated && (--i > 0)) {
          newPort = PortProber.findFreePort();
          generated = firefoxPorts.add(newPort);
      }
      if (!generated) {
          newPort = 7055;
      }
      if (firefoxPorts.size() > 20) {
          firefoxPorts.remove(0);
      }
      LOGGER.debug(firefoxPorts);

      profile.setPreference(FirefoxProfile.PORT_PREFERENCE, newPort);
      LOGGER.debug("FireFox profile will use '" + newPort + "' port number.");

      profile.setPreference("dom.max_chrome_script_run_time", 0);
      profile.setPreference("dom.max_script_run_time", 0);

if (Configuration.getBoolean(Configuration.Parameter.AUTO_DOWNLOAD) && !(Configuration.isNull(Configuration.Parameter.AUTO_DOWNLOAD_APPS)
		|| "".equals(Configuration.get(Configuration.Parameter.AUTO_DOWNLOAD_APPS))))
{
          profile.setPreference("browser.download.folderList", 2);
          profile.setPreference("browser.download.dir", ReportContext.getArtifactsFolder().getAbsolutePath());
          profile.setPreference("browser.helperApps.neverAsk.saveToDisk", Configuration.get(Configuration.Parameter.AUTO_DOWNLOAD_APPS));
          profile.setPreference("browser.download.manager.showWhenStarting", false);
          profile.setPreference("browser.download.saveLinkAsFilenameTimeout", 1);
          profile.setPreference("pdfjs.disabled", true);
          profile.setPreference("plugin.scan.plid.all", false);
          profile.setPreference("plugin.scan.Acrobat", "99.0");
      }
else if (Configuration.getBoolean(Configuration.Parameter.AUTO_DOWNLOAD) && Configuration.isNull(Configuration.Parameter.AUTO_DOWNLOAD_APPS)
		|| "".equals(Configuration.get(Configuration.Parameter.AUTO_DOWNLOAD_APPS)))
{
	LOGGER.warn(
			"If you want to enable auto-download for FF please specify '" + Configuration.Parameter.AUTO_DOWNLOAD_APPS.getKey() + "' param");
}

      profile.setAcceptUntrustedCertificates(true);
      profile.setAssumeUntrustedCertificateIssuer(true);
      
      return profile;
  }