custom

# File actionpack/lib/action_controller/mime_responds.rb, line 127
      def custom(mime_type, &block)
        mime_type = mime_type.is_a?(Mime::Type) ? mime_type : Mime::Type.lookup(mime_type.to_s)

        @order << mime_type

        @responses[mime_type] ||= Proc.new do
          @response.template.template_format = mime_type.to_sym
          @response.content_type = mime_type.to_s
          block_given? ? block.call : @controller.send(:render, :action => @controller.action_name)
        end
      end