Proxy cache for php site

[lpugoy]

Maxim Dounin Wrote:
-------------------------------------------------------
> Yes, nginx won't cache responses with cookies
> unless you 
> specifically ask it to via proxy_ignore_headers
> directive[1].
> 
> Please also note that if you do so, you may want
> to also instruct 
> nginx to hide returned cookies from clients (via
> proxy_hide_header 
> directive[2]), or you'll end up with multiple
> clients with the 
> same cookie.
> 
> Example configuration should look like:
> 
>     proxy_ignore_headers Set-Cookie;
>     proxy_hide_header Set-Cookie;
> 
> Depending on the actual headers your backend
> returns you may also 
> need to ignore other headers as well for cache to
> work, notably 
> Expires and Cache-Control.
> 
> Alternatively, you may want to instruct your
> backend to not return 
> headers which prevent caching.
> 
> [1]
> http://wiki.nginx.org/HttpProxyModule#proxy_ignore
> _headers
> [2]
> http://wiki.nginx.org/HttpProxyModule#proxy_hide_h
> eader
> 

Hello.

Thank you for the explanation. I now understand the problem and it is
now working.

I want to add a condition where if a cookie with the name sess_id is
included in the request, then the cache would be bypassed. I tried the
following 

if ($http_cookie ~* "sess_id") {
  set $no_cache "1";
}

proxy_no_cache $no_cache;
proxy_cache_bypass $no_cache;

but it doesn't seem to work. What is the correct way to do this? Thank
you very much.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,216756,218066#msg-218066