nginx - 仅将主域重定向到 www，而不是子域

Question

我是 Nginx 的新手，并试图弄清楚如何正确处理子域。我想要实现的是主域example.com总是重定向到https://www.example.com，但子域sub.example.com应该总是重定向到https://sub.example.com。在我当前的设置中，第一个要求得到满足，但sub.example.com 总是被重定向到https://www.sub.example.com。我的配置有什么问题，我该如何解决？

在此先感谢您，费边。

---

我的两个服务器配置文件：

默认

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

如果其他人也遇到此问题：尝试清理浏览器缓存。