    # File lib/rack/server.rb, line 218
          def default_middleware_by_environment
            m = Hash.new {|h,k| h[k] = []}
            m["deployment"] = [
              [Rack::ContentLength],
              [Rack::Chunked],
              logging_middleware,
              [Rack::TempfileReaper]
            ]
            m["development"] = [
              [Rack::ContentLength],
              [Rack::Chunked],
              logging_middleware,
              [Rack::ShowExceptions],
              [Rack::Lint],
              [Rack::TempfileReaper]
            ]

            m
          end