HTTP/1.1 200 OK Date: Wed, 20 Mar 2019 15:50:52 GMT Server: Apache X-Frame-Options: SAMEORIGIN Accept-Ranges: bytes Cache-Control: max-age=900 Expires: Wed, 20 Mar 2019 16:05:52 GMT Vary: Accept-Encoding Transfer-Encoding: chunked Content-Type: text/html; charset=UTF-8 数字资源