显示HTTP状态码和HEAD信息↓
HTTP/1.1 401
Server: nginx
Date: Tue, 25 Jun 2024 06:15:46 GMT
Content-Type: text/html;charset=UTF-8
Connection: keep-alive
Keep-Alive: timeout=20
P3P: CP="CAO PSA OUR"
X-Blackboard-appserver: onteb.ustc.edu.cn
X-Blackboard-product: Blackboard Learn ™ 3300.0.1-rel.37+c07f12a
Pragma: no-cache
Cache-Control: no-cache
WWW-Authenticate: BASIC realm="www.bb.ustc.edu.cn"
Content-Security-Policy: frame-ancestors 'self'
X-Frame-Options: SAMEORIGIN
Last-Modified: Fri, 25 Jun 2004 06:15:46 GMT
Expires: Sun, 25 Jun 2023 06:15:46 GMT
Xythos.LoggedInWithCredentials: false
Vary: Accept-Encoding