nginx 利用497错误来从http跳转到https

参考https://www.cnblogs.com/nuccch/p/7681592.html

例子

server {
    listen 80;
    listen 443 ssl;
    server_name domain.com;
    ssl on;
    ssl_certificate     /etc/nginx/ssl/domain.com.crt; 
    ssl_certificate_key /etc/nginx/ssl/domain.com.crt;
    # other
    error_page 497 https://$server_name$request_uri;
}