301

server {
if ($host = a.t.com) {
return 301 https://$host$request_uri;
} # managed by Certbot

server_name a.t.com;
listen 80;
return 404; # managed by Certbot

}

Request URL: http://a.t.com/
Request Method: GET
Status Code: 301 Moved Permanently (from disk cache)
Remote Address: 7.17.2.53:80
Referrer Policy: no-referrer-when-downgrade

301

原文：https://www.cnblogs.com/rsapaper/p/13267138.html