# File lib/rack/directory.rb, line 70
    def check_forbidden
      return unless @path_info.include? ".."

      body = "Forbidden\n"
      size = Rack::Utils.bytesize(body)
      return [403, {"Content-Type" => "text/plain",
        "Content-Length" => size.to_s,
        "X-Cascade" => "pass"}, [body]]
    end