# 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