显示HTTP状态码和HEAD信息↓
HTTP/1.1 503 Service Unavailable
Server: nginx/1.4.6 (Ubuntu)
Date: Tue, 02 Jul 2024 17:39:00 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
X-Powered-By: PHP/7.0.6
Set-Cookie: MoodleSession=fktcouj4tdq93bbk4dh2vt0286; path=/
Expires: Mon, 20 Aug 1969 09:23:00 GMT
Cache-Control: no-store, no-cache, must-revalidate
Pragma: no-cache
X-UA-Compatible: IE=edge
Cache-Control: post-check=0, pre-check=0
Last-Modified: Tue, 02 Jul 2024 17:39:00 GMT
Content-Language: zh-cn