Problem with proxy cache

[bia...@virtual.ufc.br]

Hi.

I have a project which is working just fine.

But i've tryied to follow this site and add proxy cache to my nginx config: http://vstark.net/2012/10/21/nginx-unicorn-performance-tweaks/ and devise just won't sign_in anymore. I don't get any errors, just don't sign_in and redirect me to login again.

As the autor from the link suggested to someone with same problem as I, i've done this on my nginx conf: 

   location = /users/sign_in{

  proxy_pass http://app;

      proxy_set_header Host $http_host;

  proxy_ignore_headers Set-Cookie;

  proxy_ignore_headers Cache-Control;

  proxy_cache_bypass        $http_secret_header;

  add_header X-Cache-Status $upstream_cache_status;

}

The same to /login.

But devise still won't sign_in.

Anyone knows how to solve that?

[bia...@virtual.ufc.br]

it doesn't gives me not authorized error at log, but it redirects me back to login