Cron，Ruby和watir-webdriver问题

Question

i have simple ruby+watir-webdriver example:

#!/usr/bin/env ruby

require "rubygems"
require 'watir-webdriver'

browser = Watir::Browser.new
...
# do something
...
browser.close

when i run this file manually with:

/path/to/my/ruby/example.rb

it works fine. When i put this in cronjob, doesnt work...i've changed the cronjob to

ruby /path/to/my/ruby/example.rb

but was again not working. any ideas how to locate the problem?

@Kevin here the output:

/home/lks/.rvm/gems/ruby-1.9.3-p194/gems/selenium-webdriver-2.21.2/lib/selenium/webdriver/firefox/launcher.rb:77:in `connect_until_stable': unable to obtain stable firefox connection in 60 seconds (127.0.0.1:7055) (Selenium::WebDriver::Error::WebDriverError)
        from /home/lks/.rvm/gems/ruby-1.9.3-p194/gems/selenium-webdriver-2.21.2/lib/selenium/webdriver/firefox/launcher.rb:37:in `block in launch'
        from /home/lks/.rvm/gems/ruby-1.9.3-p194/gems/selenium-webdriver-2.21.2/lib/selenium/webdriver/firefox/socket_lock.rb:20:in `locked'
        from /home/lks/.rvm/gems/ruby-1.9.3-p194/gems/selenium-webdriver-2.21.2/lib/selenium/webdriver/firefox/launcher.rb:32:in `launch'
        from /home/lks/.rvm/gems/ruby-1.9.3-p194/gems/selenium-webdriver-2.21.2/lib/selenium/webdriver/firefox/bridge.rb:19:in `initialize'
        from /home/lks/.rvm/gems/ruby-1.9.3-p194/gems/selenium-webdriver-2.21.2/lib/selenium/webdriver/common/driver.rb:31:in `new'
        from /home/lks/.rvm/gems/ruby-1.9.3-p194/gems/selenium-webdriver-2.21.2/lib/selenium/webdriver/common/driver.rb:31:in `for'
        from /home/lks/.rvm/gems/ruby-1.9.3-p194/gems/selenium-webdriver-2.21.2/lib/selenium/webdriver.rb:63:in `for'
        from /home/lks/.rvm/gems/ruby-1.9.3-p194/gems/watir-webdriver-0.6.1/lib/watir-webdriver/browser.rb:35:in `initialize'

Answer 1

I have found the solution - i need to start the browser in headless mode, here my working example:

#!/usr/bin/env ruby

require 'rubygems'
require 'watir-webdriver'
require 'headless'

headless = Headless.new
headless.start
browser = Watir::Browser.start 'http://www.url.com'
...
# do something
...
browser.close
headless.destroy

Source: http://watirwebdriver.com/headless/

Thanks a lot for the help!

Answer 2

What you need is some output to explain what the issue is. Try the following and send us the contents of the cron_out.log file.

/path_to_ruby_exec/ruby /path/to/my/ruby/example.rb >/homedir/cron_out.log 2>&1

Also, try "/path_to_ruby_exec/ruby" instead of "ruby"