Header check
Type Content
HTTP/1.1 200 OK
Server nginx/1.12.1
Date Tue, 23 Apr 2019 18:06:00 GMT
Content-Type text/html; charset=UTF-8
Connection keep-alive
X-Powered-By PHP/7.0.3
Vary Accept-Encoding,Cookie
Cache-Control max-age=3, must-revalidate
Cache-Control max-age=15552000
Expires Sun, 20 Oct 2019 18:05:59 GMT