NGINX 转发 http 报错

NGINX 转发 http 报错：

SSL_do_handshake() failed (SSL: error:1408F10B:SSL routines:ssl3_get_record:wrong version number) while SSL handshaking to upstream

代码内容：

 upstream aliyun_server {
     server ****.aliyuncs.com;
     keepalive 100;
 }
 ​
 location /APIService/file/ {
     proxy_set_header Content-disposition "attachment";
     proxy_set_header Access-Control-Expose-Headers "*,X-IS-Error-Code,X-IS-Error-Msg,Content-disposition";
     proxy_set_header Host "****.aliyuncs.com";
 ​
     proxy_connect_timeout 5;
     proxy_send_timeout 5;
     proxy_read_timeout 60;
     proxy_http_version 1.1;
     proxy_set_header Connection "";
     proxy_pass https://aliyun_server/;
 }

错误原因：http 协议和端口号配置的不对，upstream 中配置 server 默认端口是 80，HTTPS 对应端口应该是443。

修改为：

 upstream aliyun_server {
     server ****.aliyuncs.com:443;
     keepalive 100;
 }