But I really want to track my network traffic!

Well, it's not all bad news. Selenium doesn't explicitly provide support for network traffic; however, it does provide support for proxies. If you want to track your network traffic, what's the best way to do it? Why, a proxy, of course!

There are many proxies available, but we will focus on one in particular: the BrowserMob proxy. The BrowserMob proxy has been written with test automation in mind and integrates very easily with Selenium. Let's look at a basic implementation:

package com.masteringselenium.tests;

import net.lightbody.bmp.BrowserMobProxy;
import net.lightbody.bmp.BrowserMobProxyServer;
import net.lightbody.bmp.client.ClientUtil;
import net.lightbody.bmp.core.har.Har;
import net.lightbody.bmp.core.har.HarEntry;
import org.openqa.selenium.Proxy;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.firefox.FirefoxOptions;
import org.openqa.selenium.remote.CapabilityType...