nginx访问http80端口跳转https443端口

在配置文件中加入下面代码
server {
...

if ($server_port = 80){
return 301 https://$server_name$request_uri;}
if ($scheme = http){
return 301 https://$server_name$request_uri;} error_page 497 https://$server_name$request_uri; ....

}