How to get PID of a browser instance using Selenium WebDriver + Java?

Question

To bring browser to front, as per one of comments I need to get PID of browser. This helps to get PID but that is for Python. Is there any way, I can get PID of browser using Selenium WebDriver + Java?

Answer 1

To retrieve the PID of Firefox Browser initiated and controlled by WebDriver using Selenium and java you can use getCapabilities() method and you can use the following solution:

• Code Block:

  import java.io.IOException;
  
  import org.openqa.selenium.Capabilities;
  import org.openqa.selenium.WebDriver;
  import org.openqa.selenium.firefox.FirefoxDriver;
  import org.openqa.selenium.remote.RemoteWebDriver;
  
  public class PID_Firefox_Java {
  
      public static void main(String[] args) throws IOException {
  
          System.setProperty("webdriver.gecko.driver", "C:\\Utility\\BrowserDrivers\\geckodriver.exe");
          WebDriver driver = new FirefoxDriver();
          Capabilities cap = ((RemoteWebDriver) driver).getCapabilities();
          System.out.println("moz:processID value is : "+cap.getCapability("moz:processID"));
      }
  }
  

• Console Output:

  moz:processID value is : 4576
  

Answer 2

I'm not sure whether it directly possible for Chrome as @DebanjanB posted for Firefox. You can use below code for now to achieve that

public static void main(String[] args) throws IOException {

    System.out.println(new Example().getProcessId("firefox"));
}


public String getProcessId(String browserName) throws IOException {
    int port = 0;
    WebDriver driver;


    if (browserName.equalsIgnoreCase("firefox")) {
        WebDriverManager.firefoxdriver().setup();
        GeckoDriverService service = GeckoDriverService.createDefaultService();
        driver = new FirefoxDriver(service);
        port = service.getUrl().getPort();


    } else if (browserName.equalsIgnoreCase("chrome")) {
        WebDriverManager.chromedriver().setup();
        ChromeDriverService service = ChromeDriverService.createDefaultService();
        driver = new ChromeDriver(service);
        port = service.getUrl().getPort();

    }
    BufferedReader reader = new BufferedReader(new InputStreamReader(Runtime.getRuntime().exec("lsof -i :" + port).getInputStream()));
    StringBuilder builder = new StringBuilder();
    String line = null;
    Set<String> set = new HashSet<String>();
    while ((line = reader.readLine()) != null) {
        if (line.contains(String.valueOf(port)) && line.contains("LISTEN")) {
            set.add(line.split(" ")[1]);
        }
    }
    return set.iterator().next();
}

UPDATED:

For windows, command is different. So need to make some tweaks in above code.

BufferedReader reader = new BufferedReader(new InputStreamReader(Runtime.getRuntime().exec("netstat -aon | find \""+ port+"\"").getInputStream()));
StringBuilder builder = new StringBuilder();
String line = null;
Set<String> set = new HashSet<String>();
while ((line = reader.readLine()) != null) {
    if (line.contains(String.valueOf(port)) && line.contains("LISTEN")) {
        String s[]=line.split(" ");
        set.add(s[s.length-1]);
    }
}
return set.iterator().next();

Note: The command i passed to get PID is used on Mac. Please change it as per OS in case it doesn't work.