roll.rb

# Final Countdown
# config.middleware.use Roll
class Roll
  def initialize(app)
    @app = app
  end
  
  def call(env)
    request = Rack::Request.new(env)
    ip = request.ip
    if roll?
      return [302, {'Location' => 'http://www.youtube.com/v/tt_ro2aerQg&autoplay=1&iv_load_policy=3&start=12'}, ["Final Countdown!"]]
    else
      @app.call(env)
    end
  end
  
  private
  def roll?
    (rand(10) == 4)
  end
end