# File lib/rack/perftools_profiler/return_data.rb, line 10
    def response
      if @profiler.profiling?
        [400, {'Content-Type' => 'text/plain'}, ["No profiling data available yet.\nVisit to /__stop__ to finish profiling."]]
      else
        @middleware.profiler_data_response(@profiler.data(@get_params))
      end
    end