nginx - 只將主域名重定向到www，而不是子域名

Question

我是Nginx新手，想弄清楚如何正確處理子域名。我想實現的是主域example.com總是被重定向到https://www.example.com，但子域名爲sub.example.com應該總是被重定向到https://sub.example.com。在我目前的設置中，滿足了第一個要求，但總是將sub.example.com重定向到https://www.sub.example.com。我的配置有什麼問題，我該如何解決它？

在此先感謝，Fabian。

---

我的兩個服務器配置文件：

默認

server { 
    listen 80; 
    listen [::]:80; 
    server_name example.com www.example.com; 
    return 301 https://www.$host$request_uri; 
} 

server { 
    listen 443 ssl http2; 
    server_name example.com; 
    ssl_certificate /path/on/my/server/to/certificate.pem; 
    ssl_certificate_key /path/on/my/server/to/privatekey.pem; 
    return 301 https://www.$host$request_uri; 
} 


server { 
    listen 443 default_server ssl http2; 
    listen [::]:443 default_server ssl http2; 
    server_name www.example.com; 
    ssl_certificate /path/on/my/server/to/certificate.pem; 
    ssl_certificate_key /path/on/my/server/to/privatekey.pem; 

    root /var/www/html; 
    index index.html index.htm index.nginx-debian.html; 

    location/{ 
     try_files $uri $uri/ =404; 
     index index.php index.html index.htm; 
    } 
} 

子

server { 
    listen 80; 
    listen [::]:80; 
    server_name sub.example.com; 
    return 301 https://$host$request_uri; 
} 

server { 

    listen 443 ssl; 
    listen [::]:443 ssl; 
    server_name sub.example.com; 
    ssl_certificate /path/on/my/server/to/subcertificate.pem; 
    ssl_certificate_key /path/on/my/server/to/subprivatekey.pem; 

    root /var/www/sub; 

    location/{ 
     index index.php index.html index.htm; 
     try_files $uri = 404; 
    } 

    location ~ \.php$ { 
     try_files $uri = 404; 
     include fastcgi_params; 
     fastcgi_pass unix:/var/run/php7-fpm-web1.sock; 
     fastcgi_index index.php; 
     fastcgi_param SCRIPT_FILENAME $document_root/$fastcgi_script_name; 
    } 
} 

Answer 1

如果其他人遇到此問題：嘗試清理瀏覽器緩存。