It will be called arbitrarily
* many times for each string...., Payload Too Large) \
XX(414, URI_TOO_LONG, URI Too Long)...\
XX(428, PRECONDITION_REQUIRED, Precondition Required) \
XX(429, TOO_MANY_REQUESTS..., Too Many Requests) \
XX(431, REQUEST_HEADER_FIELDS_TOO_LARGE, Request...{
HPE_OK,
HPE_CB_message_begin,
HPE_CB_url,
...
};
得到错误类型枚举
*/
/* Define HPE_