配置https证书，并实现http自动转发https

在nginx.conf文件中新增配置：

server {
        listen 80;
         #增加监听https443端口
        listen 443 ssl;
        server_name  www.demo.com demo.com;
         
         #增加证书配置
         ssl_certificate      cert/1json.pem;
         ssl_certificate_key  cert/1json.key;
         ssl_session_cache shared:SSL:1m;
         ssl_session_timeout 5m;
         ssl_ciphers HIGH:!aNULL:!MD5;
         ssl_prefer_server_ciphers on;
 
         server_name_in_redirect off;
         error_log logs/server1.log debug;
         rewrite_log on;
         proxy_set_header Host $host:$server_port;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header REMOTE-HOST $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         
         #http转发https必须加下面两项        
         proxy_set_header X-Forwarded-Proto https;
         proxy_redirect http:// https://;
         access_log  logs/server1.access.log;
         
         location / {
              proxy_pass  http://127.0.0.1:8081/;
              #index  index.html index.htm;
        }
}

nginx1.8测试通过。