适用场景：利用一个Nginx，即可把Java、PHP、Python等项目统一起来。

    下面的代码意思就是说，如果你访问 http://pic.example.top，就等同于访问 http://xxx.xx.xx.xx:8041。

    1. upstream flow_server {
    2.     server 127.0.0.1:8041;
    3. }
    5. server {
    6.     listen 80;
    7.     server_name pic.example.top;
    9.     # root /var/www/smpp; 
    11.     #location /smpp {
    12.     #    add_header Access-Control-Allow-Origin *;
    13.     #    add_header Access-Control-Allow-Headers X-Requested-With;
    14.     #    add_header Access-Control-Allow-Methods GET,POST,OPTOPNS;
    15.     #    
    16.     #    proxy_set_header    X-Real-IP $remote_addr;
    17.     #    proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
    18.     #    proxy_set_header    Host $http_host;
    19.     #}
    21.     location / {
    22.         proxy_pass http://127.0.0.1:8041;
    23.         index index.html;
    24.         try_files /index.html =404;
    25.     }
    27.     location = /favicon.ico {
    28.         try_files $uri $uri/;
    29.     }
    30. }