How to access Network panel on google chrome developer tools with selenium?

This possible via Selenium WebDriver. For this you should do the following:

1. Download selenium language-specific client drivers from - http://docs.seleniumhq.org/download/ and add apropriate jar files to your project build path.

2. To run a test with Chrome/Chromium you will also need chromdriver binary which you can download from - http://chromedriver.storage.googleapis.com/index.html

3. Create a test case like this:

    // specify the path of the chromdriver binary that you have downloaded (see point 2)    System.setProperty("webdriver.chrome.driver", "/root/Downloads/chromedriver");    ChromeOptions options = new ChromeOptions();    // if you like to specify another profile    options.addArguments("user-data-dir=/root/Downloads/aaa");     options.addArguments("start-maximized");    DesiredCapabilities capabilities = DesiredCapabilities.chrome();    capabilities.setCapability(ChromeOptions.CAPABILITY, options);    WebDriver driver = new ChromeDriver(capabilities);    driver.get("http://www.google.com");    String scriptToExecute = "var performance = window.performance || window.mozPerformance || window.msPerformance || window.webkitPerformance || {}; var network = performance.getEntries() || {}; return network;";    String netData = ((JavascriptExecutor)driver).executeScript(scriptToExecute).toString();

Executing javascript on Chrome/Chromium will help you to get the networking (not only) info. The resulting string 'netData' will contain the required data in JSONArray format.

Hope this will help.

From this answer.

You can use the LoggingPreferences to get the Performance logs. It returns the data in json format. Here is a sample java code. Tested this with selenium 2.53, chromedriver 2.20, Chrome 50 on Ubuntu 14.04. This should work on windows also.

    DesiredCapabilities d = DesiredCapabilities.chrome();    LoggingPreferences logPrefs = new LoggingPreferences();    logPrefs.enable(LogType.PERFORMANCE, Level.ALL);    d.setCapability(CapabilityType.LOGGING_PREFS, logPrefs);    WebDriver driver = new ChromeDriver(d);    driver.get("http://www.google.com");    LogEntries les = driver.manage().logs().get(LogType.PERFORMANCE);    for (LogEntry le : les) {        System.out.println(le.getMessage());    }

Here is a sample output. It is formatted manually. The actual ouput is in a single line.

{    "message": {        "method": "Network.requestWillBeSent",        "params": {            "documentURL": "https://www.google.co.in/?gfe_rd=cr&ei=gpwxV4OSKMmR2ASEg6-YCg&gws_rd=ssl",            "frameId": "31172.2",            "initiator": {                "stack": {                    "callFrames": [                        {                            "columnNumber": 11511,                            "functionName": "",                            "lineNumber": 55,                            "scriptId": "50",                            "url": "https://www.google.co.in/?gfe_rd=cr&ei=gpwxV4OSKMmR2ASEg6-YCg&gws_rd=ssl"                        }                    ]                },                "type": "script"            },            "loaderId": "31172.3",            "request": {                "headers": {                    "Accept": "*/*",                    "Referer": "https://www.google.co.in/",                    "User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.94 Safari/537.36"                },                "initialPriority": "Low",                "method": "GET",                "mixedContentType": "none",                "url": "https://www.google.co.in/xjs/_/js/k=xjs.s.en.VTDhrkH4c9U.O/m=sx,c,sb,cdos,cr,elog,jsa,r,hsm,qsm,j,p,d,csi/am=AJQ0CwoS8fchIGwhrCA1YGBR/rt=j/d=1/t=zcms/rs=ACT90oGi2YIjVL5cBzOc1-MD37a1NqZ1jA"            },            "requestId": "31172.3",            "timestamp": 251208.074288,            "type": "Other",            "wallTime": 1462869123.92204        }    },    "webview": "8AF4A466-8027-4340-B9E9-CFEBDA769C50"}

Let's say you want to load a page (e.g. google.com) and extract array of resource timing objects (i.e. window.performance.getEntries()):

import timefrom selenium import webdriverdriver = webdriver.Chrome('/path/to/chromedriver)driver.get('https://www.google.com');time.sleep(5)timings = driver.execute_script("return window.performance.getEntries();")print timings