service (Rack::Handler::WEBrick)

    # File lib/rack/handler/webrick.rb, line 20
          def service(req, res)
            env = req.meta_vars
            env.delete_if { |k, v| v.nil? }

            env.update({"rack.version" => [0,1],
                         "rack.input" => StringIO.new(req.body.to_s),
                         "rack.errors" => STDERR,

                         "rack.multithread" => true,
                         "rack.multiprocess" => false,
                         "rack.run_once" => false,

                         "rack.url_scheme" => ["yes", "on", "1"].include?(ENV["HTTPS"]) ? "https" : "http"
                       })

            env["HTTP_VERSION"] ||= env["SERVER_PROTOCOL"]
            env["QUERY_STRING"] ||= ""
            env["REQUEST_PATH"] ||= "/"
            env.delete "PATH_INFO"  if env["PATH_INFO"] == ""

            status, headers, body = @app.call(env)
            begin
              res.status = status.to_i
              headers.each { |k, vs|
                if k.downcase == "set-cookie"
                  res.cookies.concat vs.to_a
                else
                  vs.each { |v|
                    res[k] = v
                  }
                end
              }
              body.each { |part|
                res.body << part
              }
            ensure
              body.close  if body.respond_to? :close
            end
          end