##### Request.实例属性 - `Request.failure` -> NoneType|str - - `Request.frame` -> [[class Frame|Frame]] - - `Request.headers` -> Dict[str, str] - - `Request.is_navigation_request` -> bool - - `Request.method` -> str - - `Request.post_data` -> NoneType|str - - `Request.post_data_buffer` -> NoneType|bytes - - `Request.post_data_json` -> NoneType|Serializable - - `Request.redirected_from` -> NoneType|Request - - `Request.redirected_to` -> NoneType|Request - - `Request.resource_type` -> str - - `Request.timing` -> Dict - - `Request.url` -> str -