How to set Proxy Authentication in seleniumWebdriver for Chrome Browser

You can do via MultiPass for HTTP basic authentication

Download the extension from
https://chrome.google.com/webstore/detail/multipass-for-http-basic/enhldmjbphoeibbpdhmjkchohnidgnah

Download the extension as crx. You can get it as crx from chrome-extension-downloader

After that the config is simple.

import java.io.File;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.chrome.ChromeOptions;

/**
 *
 * @author Phystem
 */
public class ChromeAuthTest {

    WebDriver driver;

    public ChromeAuthTest() {
        System.setProperty("webdriver.chrome.driver", "chromedriver.exe");
    }

    private void initDriver() {
        ChromeOptions cOptions = new ChromeOptions();
        cOptions.addExtensions(new File("MultiPass-for-HTTP-basic-authentication_v.crx"));
        driver = new ChromeDriver(cOptions);
        configureAuth(
                "https://the-internet.herokuapp.com/basic_auth",
                "admin",
                "admin");
    }

    private void configureAuth(String url, String username, String password) {
        driver.get("chrome-extension://enhldmjbphoeibbpdhmjkchohnidgnah/options.html");
        driver.findElement(By.id("url")).sendKeys(url);
        driver.findElement(By.id("username")).sendKeys(username);
        driver.findElement(By.id("password")).sendKeys(password);
        driver.findElement(By.className("credential-form-submit")).click();
    }

    public void doTest() {
        initDriver();
        driver.get("https://the-internet.herokuapp.com/basic_auth");
        System.out.println(driver.getTitle());
        driver.quit();
    }

    public static void main(String[] args) {
        new ChromeAuthTest().doTest();
    }
}

I have used a sample site for testing.

Provide your url,username and password in the configure Auth function and try

    public class DriverClass {

    private String baseUrl;
    private String driverPath;
    private String driverName;
    private static WebDriver driver;
    private static DriverClass driverClass;

    public DriverClass() {
        try {
            baseUrl = "http://192.168.0.10:8282/ess";
            driverPath = "E:\\Work_Folder\\SelTools\\chromedriver.exe";
            driverName = "webdriver.chrome.driver";
            System.setProperty(driverName, driverPath);

            Proxy proxy = new org.openqa.selenium.Proxy();
            proxy.setSslProxy("192.168.0.200" + ":" + 3128);
            proxy.setFtpProxy("192.168.0.200" + ":" + 3128);
            proxy.setSocksUsername("avishka");
            proxy.setSocksPassword("12345678");

            DesiredCapabilities desiredCapabilities = DesiredCapabilities.chrome();
            desiredCapabilities.setCapability(CapabilityType.PROXY, proxy);


            driver = new ChromeDriver(desiredCapabilities);


            driver.get(baseUrl);


        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

The proxy setting has been added with desired capabilities to pass values to proxy authentication,worked finally

This code (from Avishka Perera's answer) does not work for me:

    proxy.setSocksUsername("avishka");
    proxy.setSocksPassword("12345678");

The username and password set in this way do not take effect for the http/https proxy - the Proxy Authentication box still popped up.

I'm using Selenium java 3.141.0, ChromeDriver 2.33 and chrome 70. What works for me is to follow Mike's answer here Selenium using Python: enter/provide http proxy password for firefox . Create the zip file, then add the extension like this:

ChromeOptions chromeOptions = new ChromeOptions();
chromeOptions.addExtensions(new File("src/test/resources/proxy.zip"));
WebDriver driver = new ChromeDriver(chromeOptions);

One catch is that the above code will run into error if you set "--headless" argument because chrome in headless mode cannot have extension (Is it possible to run Google Chrome in headless mode with extensions?). If your Chrome runs in Docker container and cannot show the UI, then to get this solution work, you'll need to run with Xvfb instead of in headless mode.