显示HTTP状态码和HEAD信息↓
HTTP/1.1 200 OK
Server: nginx
Date: Wed, 03 Jul 2024 03:43:36 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
Vary: Accept-Encoding
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Pragma: no-cache
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Strict-Transport-Security: max-age=31536000;includeSubdomains;preload