如何合併這兩個 nginx 規則以使其正常工作？

我在使用 htaccess 規則之前執行 Apache，但切換到執行 Discourse 論壇軟體的 docker 實例的 nginx。我在 docker 實例之外執行 nginx，然後使用 proxypass 使其位於 domain.com/forum 中。在我設置它之前，如下所示，以便將輸入的任何子域減去 www。並將其附加到網址的末尾。如果沒有提供子域，它將最終正常工作。

RewriteEngine on
RewriteCond %{HTTP_HOST} !^www. [NC]
RewriteCond %{HTTP_HOST} .example.com$ [NC]
RewriteRule ^(.*)$ http://example.com/forum/t/%1$1 [L,NC,QSA]

我使用了一個從 htaccess 到 nginx 的轉換器，它給了我這個：

location / {
 if ($http_host !~ "^www\."){
  rewrite ^(.*)$ http://example.com/forum/t/%1$1 redirect;
 }
}

我目前的位置設置如下所示：

location /forum {
   proxy_pass http://unix:/var/discourse/shared/standalone/nginx.http.sock:;
   proxy_set_header Host $http_host;
   proxy_http_version 1.1;
   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
   proxy_set_header X-Forwarded-Proto https;
  }
   fastcgi_read_timeout 60;
}

所以我的問題是，如何將 if 語句中的轉換程式碼與包含 proxy_pass 內容的目前程式碼合併？我試圖把它放在那裡，但結果只是一個循環。

任何見解將不勝感激，謝謝！

這就是我最終得到的結果。事後我為特定的子域添加了一些額外的東西，但這就是真正起作用的原因。

server {
   server_name example.com www.example.com;
   listen ipaddress;

   root /home/me/public_html;
   index index.html index.htm index.php;
   access_log /var/log/virtualmin/example.com_access_log;
   error_log /var/log/virtualmin/example.com_error_log;
   fastcgi_param GATEWAY_INTERFACE CGI/1.1;
   fastcgi_param SERVER_SOFTWARE nginx;
   fastcgi_param QUERY_STRING $query_string;
   fastcgi_param REQUEST_METHOD $request_method;
   fastcgi_param CONTENT_TYPE $content_type;
   fastcgi_param CONTENT_LENGTH $content_length;
   fastcgi_param SCRIPT_FILENAME /home/me/public_html$fastcgi_script_name;
   fastcgi_param SCRIPT_NAME $fastcgi_script_name;
   fastcgi_param REQUEST_URI $request_uri;
   fastcgi_param DOCUMENT_URI $document_uri;
   fastcgi_param DOCUMENT_ROOT /home/me/public_html;
   fastcgi_param SERVER_PROTOCOL $server_protocol;
   fastcgi_param REMOTE_ADDR $remote_addr;
   fastcgi_param REMOTE_PORT $remote_port;
   fastcgi_param SERVER_ADDR $server_addr;
   fastcgi_param SERVER_PORT $server_port;
   fastcgi_param SERVER_NAME $server_name;
   fastcgi_param HTTPS $https;
   location ~ \.php$ {
       try_files $uri =404;
       fastcgi_pass unix:/var/php-nginx/15187383894597.sock/socket;
   }
   listen 443 ssl http2;  listen [::]:443 ssl http2;
   ssl_certificate /home/me/ssl.combined;
   ssl_certificate_key /home/me/ssl.key;
       http2_idle_timeout 5m; # up from 3m default

   location /forum {

       proxy_pass http://unix:/var/discourse/shared/standalone/nginx.http.sock:;
       proxy_set_header Host $http_host;
       proxy_http_version 1.1;
       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
       proxy_set_header X-Forwarded-Proto https;
   }
   fastcgi_read_timeout 60;
}

# This server forwards requests from subdomains
server {
 server_name ~^(.*)\.example\.com$;
  listen   ipaddress default_server;

 location / {
   return 301 https://example.com/forum/c/$1;
 }
}

然後我添加了一些來測試隨機的特定的，它們工作得很好。

# Test for specificsub
server {
 server_name specificsub.example.com;
  listen   ipaddress;

 location / {
   return 301 https://example.com/forum/c/assets/specificsub;
 }
}

# Test for specificsub2
server {
 server_name specificsub2.example.com;
  listen   ipaddress;

 location / {
   return 301 https://example.com/forum/c/assets/specificsub2;
 }
}

引用自：https://serverfault.com/questions/897607