Simple method to test whether a user agent is a bot or not.

gistfile1.rb

protected
  def bot?
    # Simple check to match if the user agent is a bot.  We look for anything
    # that has the pattern bot/ (e.g. Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html))
    # or that does not start with Mozilla / Opera (e.g. AdsBot-Google (+http://www.google.com/adsbot.html))
    # This could probably be combined in to one regex, but couldn't figure out how to do it quickly.
    %r[bot/] =~ request.user_agent || %r{^(?!Mozilla|Opera)} =~ request.user_agent
  end