显示HTTP状态码和HEAD信息↓
HTTP/1.1 521
Date: Sat, 08 Jun 2024 21:40:38 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=%2F9uu8TX1s5rhDOIgGzMBYIoFoTB%2ByDPU2DMsUJQx%2Bh6LOfJ4kooy0yWLx7A6EVqmJSDzTjJlvCUPrWIOY18FY3uKLjAEC1hGUhb2qIEt4tI9UxmzGSDH6bj%2FFqU5e9kP"}],"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: 890c0a9c1e36957a-LHR
alt-svc: h3=":443"; ma=86400