显示HTTP状态码和HEAD信息↓
HTTP/1.1 521
Date: Tue, 21 May 2024 21:37:36 GMT
Content-Type: text/plain; charset=UTF-8
Content-Length: 15
Connection: keep-alive
Report-To: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=KTcD89Shu%2FsWShAGpAzAqjO4OdQQ2vxOriHxzpXqBITlb6vHUkbsKdlvXcdcC6ZYCDih3RkirUCinD3X7Jhc2j1K33QIIJSvJKMHHPasiBpiO2thBBtV%2BOEzhdTotQ%3D%3D"}],"group":"cf-nel","max_age":604800}
NEL: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 8877b5677b8676de-LHR
alt-svc: h3=":443"; ma=86400