如何解決非 www 重定向到 www Nginx？

這是我的 NGinx Web 伺服器配置

   server {
       if ($host ~ ^[^.]+\.betafox\.net$) {
           return 301 https://$host$request_uri;
       } # managed by Certbot
   
   
       if ($host = www.betafox.net) {
           return 301 https://$host$request_uri;
       } # managed by Certbot
   
   
       if ($host = betafox.net) {
           return 301 https://$host$request_uri; 
       } # managed by Certbot
   
       listen 80;
       listen [::]:80;
   
       #server_name _;
       root /var/www/html;
   
   server_name betafox.net *.betafox.net;
       #return 301 https://$host$request_uri;
       index index.php index.html index.htm;
       location / {
           # try_files $uri $uri/ =404;
           try_files $uri $uri/ /index.php?q=$uri&$args;
           proxy_pass  https://betafox.net/;
           proxy_redirect  https://betafox.net/ $host;
           proxy_set_header Accept-Encoding "";
           proxy_ssl_server_name on;
       }
       location ~ \.php$ {
           include snippets/fastcgi-php.conf;
           #fastcgi_pass 127.0.0.1:9000;
           #fastcgi_pass unix:/run/php/php8.0-fpm.sock;
           fastcgi_pass unix:/etc/alternatives/php-fpm.sock;
    }
   
   
   }
   
   server {
   
   listen 443 ssl default_server;
           listen [::]:443 ssl default_server;
   
           root /var/www/html;
           index index.php index.html index.htm;
   
         # server_name _;
           server_name betafox.net *.betafox.net;
           # Maximum file upload size is 4MB - change accordingly if needed
           client_max_body_size 512M;
           client_body_buffer_size 128k;
           include snippets/letsencrypt-nginx-certs.conf;
           include snippets/letsencrypt-nginx-route.conf;
   
           location / {
                   # try_files $uri $uri/ =404;
                   try_files $uri $uri/ /index.php?q=$uri&$args;
           }
   error_page 404 /404.html;
   
           error_page 500 502 503 504 /50x.html;
           location = /50x.html {
                   root /usr/share/nginx/html;
           }
   
           location ~ \.php$ {
                   include snippets/fastcgi-php.conf;
                   #fastcgi_pass 127.0.0.1:9000;
                   #fastcgi_pass unix:/var/run/php8.0-fpm.sock;
                   fastcgi_pass unix:/etc/alternatives/php-fpm.sock;
           }
       ssl_certificate /etc/letsencrypt/live/betafox.net-0001/fullchain.pem; # managed by Certbot
       ssl_certificate_key /etc/letsencrypt/live/betafox.net-0001/privkey.pem; # managed by Certbot
   
   }

當我為我的 FQDN 和子域安裝 SSL 證書時，Certbot 自動修改了大部分內容。我面臨的問題是關於 URL 重定向。原始 URL 是www.betafox.net，當使用者鍵入 betafox.net 時，將重定向到https://betafoxnet.www.betafox.net/並且有消息說：您要查找的站點不存在。

我只希望所有鍵入 betafox.net 的使用者都被轉發到www.betafox.net。我相信 Nginx 可以做到這一點。我怎樣才能做到這一點？

不幸的是，Certbot 使用if有問題的$host變數創建了 nginx 重定向。

最好將重定向放在單獨的server部分中，如下所示。

# Redirect all requests to betafox.net URLs to corresponding www.betafox.net URLs
server {
   listen 80;
   listen 443 ssl http2;

   ssl_certificate /etc/letsencrypt/live/betafox.net-0001/fullchain.pem; # managed by Certbot
   ssl_certificate_key /etc/letsencrypt/live/betafox.net-0001/privkey.pem; # managed by Certbot

   server_name betafox.net;

   return 301 https://www.betafox.net$request_uri;
}

# Redirect all other subdomain HTTP requests to HTTPS.
server {
   listen 80;

   server_name *.betafox.net;

   return 301 https://$http_host$request_uri;:
}

# Removed the server block for port 80, it looked meaningless

server {
   # Removed the default_server, default_server should not be the actual website
   listen 443 ssl;
   listen [::]:443 ssl;

   root /var/www/html;
   index index.php index.html index.htm;

   server_name betafox.net *.betafox.net;
   # Maximum file upload size is 4MB - change accordingly if needed
   client_max_body_size 512M;
   client_body_buffer_size 128k;
   include snippets/letsencrypt-nginx-certs.conf;
   include snippets/letsencrypt-nginx-route.conf;

   location / {
       try_files $uri $uri/ /index.php?q=$uri&$args;
   }
   error_page 404 /404.html;

   error_page 500 502 503 504 /50x.html;
   location = /50x.html {
       root /usr/share/nginx/html;
   }

   location ~ \.php$ {
       include snippets/fastcgi-php.conf;
       fastcgi_pass unix:/etc/alternatives/php-fpm.sock;
   }
   ssl_certificate /etc/letsencrypt/live/betafox.net-0001/fullchain.pem; # managed by Certbot
   ssl_certificate_key /etc/letsencrypt/live/betafox.net-0001/privkey.pem; # managed by Certbot
}

引用自：https://serverfault.com/questions/1083283