Nginx two level domain name configuration automatically jumps to the first level domain name

Nginx Two level domain name configuration automatically jumps to the first level domain name rewrite configuration content:if($http _host!~ "^www.aaa.com$") {rewrite^ (. *) http://www.aaa.com$1 Permanent;below, the Nginx agent accesses the project Proxy_pass, and rewrite reference server{listen80; server_name www.aaa.com100.100.100.100; Location/ {                if($http _host!~ "^www.aaa.com$") {rewrite^ (. *) http://www.aaa.com$1 Permanent;} proxy_redirect off;        Proxy_set_header Host $host; Proxy_set_header X-real-IP $remote _addr; Proxy_set_header X-forwarded-For $proxy _add_x_forwarded_for; Proxy_pass http://192.168.1.2:8000;} access_log Logs/aaa.com_access.log;}

Nginx two level domain name configuration automatically jumps to the first level domain name