设置http自动跳转https

nginx设置http自动跳转到https，配置文件如下：

server {
    listen 80 ;
    listen 443 ssl http2 ;
    server_name xxx.xxx.com;
    server_tokens off;
    ssl_certificate_key /etc/nginx/ssl/default.key;
    ssl_certificate     /etc/nginx/ssl/default.crt;
    ssl_certificate_by_lua_block {
        require('ssl_certificate').set_certificate()
    }
    if ($scheme = http) {   # 设置301跳转，设置http跳转到https
        return 301 https://$server_name$request_uri;
    }

    set $mobile_rewrite do_not_perform;


    set $proxy_pass http://xxx.xxx.xxx.xxx; # 设置需要跳转到的真实服务

    if ($mobile_rewrite = perform1) { 
       return 301  https://xxx.xxx.com;
    }

    location / {
        proxy_pass $proxy_pass;
        include proxy_params;
    }
            error_page   500 502 503 504  /50x.html;
location = /50x.html {
   root   html;
        }

error_page  404   /404.html;
location = /404.html {
   root   html;
        } 
}