code: public function onRequested(Closure $fn)
      {
          if (isset($this->hookRequesteds) && !is_array($this->hookRequesteds)) {
              $this->hookRequesteds = [];
          }
          $this->hookRequesteds[] = $fn;
      }
docs: 触发重置，注意，完成触发后会马上重置，迎接下一次请求
  @param Closure $fn