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Configure Nginx to working with WebLogic 12C

Nginx is a free, open-source, high-performance HTTP server and reverse proxy server, which can be use with WebLogic application server to cache static page. It's also able to load balancing between servers. However nginx default proxy pass configuration not working properly with WebLogic server, because WebLogic server reset his http header which changes host and port. Here is the configuration for Ngnix proxy pass: 
 
        proxy_cache_path usr/apps/nignx/nginx-1.1.12/cache/ levels=1:2 keys_zone=data-cache:8m max_size=1000m inactive=600m;
 proxy_temp_path usr/apps/nignx/nginx-1.1.12/cache/temp; 

 upstream osbapp{
   server 192.168.52.101:7001;
   server 192.168.52.101:7002;
        }
        server {
          listen       8001;
          server_name  192.168.52.103;

  location / {
   proxy_set_header Host $http_host; # set the parameter for fine granned header
   proxy_set_header X-Real-IP $remote_addr;
   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
   proxy_store off;
   proxy_redirect off;
   proxy_buffering off;  
   #cache
   proxy_cache data-cache;
   proxy_cache_valid 200 302 60m;
   proxy_pass  http://osbapp; 
       }
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