Can I automate Chrome request blocking using Selenium-webdriver for Ruby?

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I am a QA automation analyst responsible for testing a multi-platform online banking application. For our automation testing we use RubyMine suite with Gherkin/Cucumber, Ruby-scripted steps and Selenium-webdriver, Watir and page-object gems/libraries.

I have a number of scripts that I cannot automate completely without manual intervention, and these include blocking certain network calls through Telerik Fiddler to produce warning pages or error messages, etc. The future of our automation would be to do this through RubyMine instead of Fiddler for network blocking. I know there is a way to do this in Chrome using Inspect Element and the Network menu using enable request blocking. However, I cannot figure out a way to force Chrome through Ruby/Selenium to block a given request. The only way is do manually do it myself, and therefore I can't actually automate these as wanted.

So, my question -- is this a possibility to automate request-blocking with Selenium-webdriver? And, if so, where should I begin to look for help with this?


To block URLs from loading with Selenium with the DevTool API:

def send_cmd(driver, cmd, params={})
  bridge = driver.send(:bridge)
  resource = "session/#{bridge.session_id}/chromium/send_command_and_get_result"
  response =, resource, {'cmd':cmd, 'params': params})
  raise response[:value] if response[:status]
  return response[:value]

send_cmd(driver, "Network.setBlockedURLs", {'urls': ["*"]})
send_cmd(driver, "Network.enable")

Selenium testing with Ruby, Your guide to running Selenium Webdriver tests with Ruby on BrowserStack. If you need automated web test, WebDriver is the way to go. Selenium WebDriver works using client-server communication. When a Selenium test script is executed, a new session of the browser driver is created, and the browser window is launched. For each command in the test script, a request is sent to the WebDriver API, which is a REST-based

It's not very well documented, but you can also implement request blocking by passing the host-resolver-rules option to chrome and mapping the domain to localhost or an invalid IP. Something like this should work for you:

options =
driver = Selenium::WebDriver.for :chrome, options: options

Handle Pop-ups, Alerts and Prompts in Automate and App Automate , You can test what happens when your web app is allowed to (or blocked from) accessing the device location, WebDriver; import​. Your PATH is where the system will look for the chromedriver.exe file. If the .exe isn't in your PATH the system won't find it.. You can find details of the file locations on your computer which are included in your PATH by right clicking My Computer and going to Properties -> advanced -> environment variables and find the PATH in the selection box.


I dont know if it can satisfy your requirement as I am no way a network expert, I do use browsermob-proxy extensively to capture network request along with selenium and there is a method to blacklist certain request

How to disable loading external urls on seleniumlibrary/robotframework

Exclude Selenium WebDriver traffic from Google Analytics, A browser automation framework and ecosystem. The Ruby bindings for Selenium/WebDriver are available as the options = Selenium::WebDriver::​ options.add_argument('--disable-popup-blocking') If you are using the remote driver you can still configure the Firefox profile:. Yes, autoload should register the fact that Selenium::WebDriver::Chrome::Options exists but will only load it when you use it. If autoload is broken somehow then this won't work – JWT Jul 24 '17 at 9:59.

Ruby Bindings · SeleniumHQ/selenium Wiki · GitHub, Selenium is a popular automation testing framework that is primarily used for cross This tutorial for Selenium WebDriver will help you develop a basic cross browser compatibility using Selenium WebDriver for Google Chrome, Since version 2.25.0, RC has support for Java, C#, Python, Perl, Ruby, etc. This session demonstrates how to work with locators in selenium webdriver and run an end to end test through chrome browser and resolve the depencies: Automating a chrome browser with the help of

How to Use Selenium WebDriver for Cross Browser Testing, We will cover writing and running Selenium tests using Node.js, as it is quick and To install selenium-webdriver, run the following command, making sure you stick with Firefox and Chrome, as they are available across all the main OSes. test too — try wrapping your last line of code in a block like this: Originally reported on Google Code with ID 1152 Complete environment: Win7 x64 Ruby 1.9.2 selenium-webdriver (0.1.2) Steps to Reproduce is run of script from example: require "selenium-webdriver" driver = Selenium::WebDriver.for :ie #or

Setting up your own test automation environment, Recent versions of Chrome display notification bar at the top of the browser switch does via the documentation and ensure your test suite does not rely on any driver = webdriver.Chrome(options=chrome_options);. Ruby: driver = Selenium::WebDriver.for :chrome, options: options Submit a request. Getting Started. Note: Running your Selenium tests on BrowserStack requires a username and an access key. To obtain your username and access keys, sign up for a Free Trial or purchase a plan. To get started, let’s run a simple Selenium Webdriver test. The Ruby script below will open a URL, input a string, submit the form,

  • To block the URI, either launch the browser on a customized proxy or call the DevTool API through Selenium or use a web extension.
  • Thanks! I will look at this now!
  • So looking into this, the DevTools API is the most likely solution we can use. However,I am not seeing examples of how this is being used for what we want to do. I am thinking of calling RequestPattern and using YAML variables as substitutes for the requests I wish to block, but I do not see a call to fail it or ability to return a 404 error, for example. Would you happen to know which calls from this API could accomplish this?
  • it doesn't seem possible to alter the response/status with Selenium/DevTool since it requires to directly listen to the socket to get the events. It looks rather simple with puppeter.
  • Thanks for this. I've spent a day trying to make this work without "Network.enable" call.
  • Awesome. I'll take a look into this as well! Thanks!