url_options

# File actionpack/lib/action_controller/metal/url_for.rb, line 35
    def url_options
      @_url_options ||= {
        host: request.host,
        port: request.optional_port,
        protocol: request.protocol,
        _recall: request.path_parameters
      }.merge!(super).freeze

      if (same_origin = _routes.equal?(request.routes)) ||
         (script_name = request.engine_script_name(_routes)) ||
         (original_script_name = request.original_script_name)

        options = @_url_options.dup
        if original_script_name
          options[:original_script_name] = original_script_name
        else
          if same_origin
            options[:script_name] = request.script_name.empty? ? "" : request.script_name.dup
          else
            options[:script_name] = script_name
          end
        end
        options.freeze
      else
        @_url_options
      end
    end