title: Skip Nginx reverse Proxy making duplicate requests on timeout for specific URL
body: <p>Below is the code snippet from nginx configuration for the Rails application. The website is being accessed at localhost:5478 locally. Ports 5479-82 have ruby instances running to handle the traffic while serving requests. The application serves as backed api for multiple user facing applications which works for normal operations. </p>
  
  <p>Issue is while uploading one of xls sheet from app, the import takes around 5 minutes and since operation times out, nginx makes the request on new port with same file.  This results in duplicating entries in DB. Increasing the timeout will not help as size and content of file is unknown. I would like to control specific url's which should not go through reverse proxy flow. Should i go for new location blocks to solve this?</p>
  
  <pre><code> upstream rails {
      ip_hash; 
      server 127.0.0.1:5479;
      server 127.0.0.1:5480;
      server 127.0.0.1:5481;
      server 127.0.0.1:5482;
    }
  
  server {
  listen          5478 default;
  server_name     _;
  root            "../protac/public";
  add_header X-Frame-Options "SAMEORIGIN";
  
  location ~ ^/assets/ {
    root "../protac/public";
    expires 1y;
    add_header Cache-Control public;
  
    add_header ETag "";
    break;
  }
  
  location ~* /  {
  
  
    # Setup redirection headers
    proxy_set_header   X-Real-IP         $remote_addr;
    proxy_set_header   X-Forwarded-For   $proxy_add_x_forwarded_for;
    proxy_set_header   Host              $http_host;
  
    proxy_buffer_size   128k;
    proxy_buffers   4 256k;
    proxy_busy_buffers_size   256k;
  
    # Pass the request thru
    proxy_pass         http://rails;
    add_header X-Frame-Options "SAMEORIGIN";
  }
  </code></pre>