显示HTTP状态码和HEAD信息↓
HTTP/1.1 521
Date: Wed, 01 May 2024 19:28:38 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=qtwQTDIe9cQraiZlJh5K2HyZbHxY4lV6xepxI8abuScPlz5S25nxQ79yDPmoTkx61IyrPDbV09jA7%2BZbyPK7znlWLsb6fjLByfFiRwqDzREatpUBlVxCTOYuPP4IpaPRrg%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: 87d22cfd8e78643c-LHR
alt-svc: h3=":443"; ma=86400