Yes indeed. However this competent programmer has paid work to be doing, and possesses the certain knowledge that such a thing exists already. Anyway, I'll bit

Yes indeed. However this competent programmer has paid work to be doing, and possesses the certain knowledge that such a thing exists already. Anyway, I'll bite: lambda { |env| [200, {'Content-Type'=>'text/plain'}, [Rack::Request.new(env).ip]] }