1 访问http

2  修改配置访问

server {
    listen       80;

    server_name  example.cn;
    return 301 https://$server_name$request_uri;


    access_log  /data/logs/czgzzfjgsup_access.log  access;
    error_log  /data/logs/czgzzfjg_error.log  error;

#

    location / {
 
       root  /usr/local/openresty/nginx/html/;
    }

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

3 在访问http会强制跳转到https

#全站统一强制使用https,启用严格传输安全,在一年内，任何使用HTTP的请求都将被浏览器自动转换为HTTPS请求
vim nginx.conf
add_header Strict-Transport-Security "max-age=31536000; includeSubdomains; preload" always;