Question

I’m using WATIR to control browser, but there is page that never fully loads everything stucks. After 60 second timeout WATIR gives me error and I can keep writing commands, but If I try to close the browser with WATIR in made functions everything stucks.

If I close the browser manually everything seems to keep going ok so I’m looking for option to find chrome process id, PID and kill the process using ruby.

Here is code sample I found:

irb

require "watir-webdriver"

proxy = "78.159.102.86:49295"
browser = Watir::Browser.new :chrome, :switches => ['--proxy-server=' + proxy]

bridge = browser.instance_variable_get(:@bridge)
launcher = bridge.instance_variable_get(:@launcher)
binary = launcher.instance_variable_get(:@binary)
process = binary.instance_variable_get(:@process)
process.pid

All this methods gives me NIL.
The last one – NoMethodError: undefined method `pid’ for nil:NilClass

From my research I think that I need to get PID.
Then I can close process.

Any tips? I’m using windows!
So far it seems that there are no in made methods for killing process by name in Ruby.

edit:

I found what works from windows command line:

taskkill /im Firefox.exe /f /t >nul 2>&1

But since I’m on ruby it gives me error:

SyntaxError: (irb):1: unknown regexp option – f (irb):1: syntax error,
unexpected tINTEGER, expecting keyword_do or ‘{‘ or ‘(‘ taskkill /im
Firefox.exe /f /t >nul 2>&1

How to execute cmd command from ruby?

Answer 1

I’m not sure system works on windows but give it a try.

system("taskkill /im Firefox.exe /f /t >nul 2>&1")