全站https

方法一：

server {
    listen 80;
    server_name www.uscwifi.cn;
    rewrite ^ https://$server_name$request_uri? permanent; 
}

server {
    listen 443 ssl;
    server_name www.uscwifi.cn;
    root /var/www/html;
    index index.html;
    access_log /var/log/nginx/www.uscwifi.cn-access.log;
    error_log /var/log/nginx/www.uscwifi.cn-error.log;
    ssl_certificate /etc/nginx/ssl/www.uscwifi.cn.crt;
    ssl_certificate_key /etc/nginx/ssl/www.uscwifi.cn.key;
    ssl_protocols       SSLv3 TLSv1 TLSv1.1 TLSv1.2;
    ssl_ciphers         ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AES:RSA+3DES:!aNULL:!MD5:!DSS;
}

方法二：rerurn 301

server {
    listen 80;
    server_name www.uscwifi.cn;
    return 301  https://$server_name$request_uri;
}

server {
    listen 443 ssl;
    server_name www.uscwifi.cn;
    root /var/www/html;
    index index.html;
    access_log /var/log/nginx/www.uscwifi.cn-access.log;
    error_log /var/log/nginx/www.uscwifi.cn-error.log;
    ssl_certificate /etc/nginx/ssl/www.uscwifi.cn.crt;
    ssl_certificate_key /etc/nginx/ssl/www.uscwifi.cn.key;
    ssl_protocols       SSLv3 TLSv1 TLSv1.1 TLSv1.2;
    ssl_ciphers         ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AES:RSA+3DES:!aNULL:!MD5:!DSS;
}

方法三：if判断

server {
    listen 80;
    server_name www.uscwifi.cn;
    if ($host ~ www.uscwifi.cn){
        rewrite ^/(.*)$ https://www.uscwifi.cn$request_uri? permanent;
    }
}

server {
    listen 443 ssl;
    server_name www.uscwifi.cn;
    root /var/www/html;
    index index.html;
    access_log /var/log/nginx/www.uscwifi.cn-access.log;
    error_log /var/log/nginx/www.uscwifi.cn-error.log;
    ssl_certificate /etc/nginx/ssl/www.uscwifi.cn.crt;
    ssl_certificate_key /etc/nginx/ssl/www.uscwifi.cn.key;
    ssl_protocols       SSLv3 TLSv1 TLSv1.1 TLSv1.2;
    ssl_ciphers         ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AES:RSA+3DES:!aNULL:!MD5:!DSS;
}

方法四：这个不推荐写一块，但是还是要知道

$scheme是nginx内置的变量

表示请求的协议，如ftp；https，http

server {
    listen 80;
    listen 443 ssl;
    server_name www.uscwifi.cn;
    if ($scheme = http){
        return 301  https://$server_name$request_uri;
    }
    root /var/www/html;
    index index.html;
    access_log /var/log/nginx/www.uscwifi.cn-access.log;
    error_log /var/log/nginx/www.uscwifi.cn-error.log;
    ssl_certificate /etc/nginx/ssl/www.uscwifi.cn.crt;
    ssl_certificate_key /etc/nginx/ssl/www.uscwifi.cn.key;
    ssl_protocols       SSLv3 TLSv1 TLSv1.1 TLSv1.2;
    ssl_ciphers         ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AES:RSA+3DES:!aNULL:!MD5:!DSS;
}