使用nginx反向代理，一个80端口下，配置多个微信项目

　　我们要接入微信公众号平台开发，需要填写服务器配置，然后依据接口文档才能实现业务逻辑。但是微信公众号接口只支持80接口（80端口）。我们因业务需求需要在一个公众号域名下面，发布两个需要微信授权的项目，怎么办？

　　我们可以用nginx服务器做反向代理来解决这个问题。nginx服务器对外80端口，然后根据URL参数不同，对内访问不同的项目。

　　nginx配置如下：

　　打开/usr/local/nginx/conf/nginx.conf

 worker_processes  4;
 error_log  logs/error.log;
 events {
     worker_connections  1024;
 }
 http {
     include       mime.types;
     default_type  application/octet-stream;
     sendfile        on;
     keepalive_timeout  65; gzip on;
 gzip_min_length 1k;
 gzip_buffers 16 64k;
 gzip_http_version 1.1;
 gzip_comp_level 6;
 gzip_types text/plain application/x-javascript text/css application/xml application/javascript;
 gzip_vary on;     #指向项目一
     upstream backend1  {
         server  192.168.1:8081;
     }
     #指向项目二
     upstream backend2{
         192.168.1.1:8082;
     }
     proxy_cache_path /tmp/cache levels=1:2 keys_zone=cache:128m inactive=1d  max_size=1G;
     include vhosts/*;
 }

　　打开/usr/local/reverse_proxy_nginx/conf/nginx.conf

 worker_processes  2;
 events {
     worker_connections  1024;
 }
 http {
     include       mime.types;
     default_type  application/octet-stream;
     access_log  /home/nginx_log/reverse_proxy_no1_access.log;
     sendfile        on;
     keepalive_timeout  65;
     upstream backend1  {
         #server 192.168.1.1:8181;
     server  192.168.1.1:8081;
     }
     upstream backend2  {
         #server 192.168.1.1:8082;
     server  192.168.1.1:8082;
     }
     proxy_cache_path /tmp/cache levels=1:2 keys_zone=cache:128m inactive=30m  max_size=1G;
     server {
         listen       8081;
         server_name  h5.xxxx.com;         location / {
                 proxy_pass http://backend1;
             #Proxy Settings
                proxy_redirect     off;
              proxy_set_header   Host             $host;
             proxy_set_header   X-Real-IP        $remote_addr;
             proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
             proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
             proxy_max_temp_file_size 0;
             proxy_connect_timeout      90;
             proxy_send_timeout         90;
             proxy_read_timeout         90;
             proxy_buffer_size          4k;
             proxy_buffers              4 32k;
             proxy_busy_buffers_size    64k;
             proxy_temp_file_write_size 64k;
         add_header Nginx-Res "http://backend1";
         }         location ~ ^/(h5)(.*)$ {
               proxy_pass  http://backend2;
               proxy_redirect off;
               proxy_set_header Host $host;
               proxy_cache cache;
               proxy_cache_valid 200 302 1d;
               proxy_cache_valid 301 1d;
               proxy_cache_valid any 1m;
               expires 1h;
           add_header Nginx-Res "http://backend2";
               proxy_ignore_headers "Cache-Control" "Expires" "Set-Cookie";
               add_header Nginx-Cache "$upstream_cache_status";
           }         error_page   500 502 503 504  /50x.html;
         location = /50x.html {
             root   html;
         }
     location ~ .*\.(gif|jpg|png|css|js|ico)(.*) {
               proxy_pass http://backend1;
               proxy_redirect off;
               proxy_set_header Host $host;
               proxy_cache cache;
               proxy_cache_valid 200 302 30d;
               proxy_cache_valid 301 1d;
               proxy_cache_valid any 1m;
               expires 30d;
               proxy_ignore_headers "Cache-Control" "Expires" "Set-Cookie";
           add_header Nginx-Res "http://backend1";
               add_header Nginx-Cache "$upstream_cache_status";
         }

　　当我们打开URL包含h5时，就会跳到8081端口项目中，但是对外还是80端口。所以两个项目可以同时实现微信授权登录等。