Caching for a location based on cookie

[Vinay Y S]

On Fri, Jan 15, 2010 at 2:37 PM, agentzh <agentzh at gmail.com> wrote:

> On Fri, Jan 15, 2010 at 4:06 PM, Vinay Y S <vinay.ys at gmail.com> wrote:
> >
> > Hi,
> > For a given location, I want the requests to be cached only if a
> particular cookie is not present. How do I achieve that with nginx?
> > Currently I'm trying following config
> >     location /album {
> >         if ($cookie_logintoken ~* "") {
> >             set $cache_key $scheme$proxy_host$uri$is_args$args;
> >         }
>
> Please see this thread for a simple solution:
>
>    http://forum.nginx.org/read.php?2,25197
>
> Hope this helps.
>

Could you please elaborate on it? There was no issues with $cache_key value
being set in if block and being visible to proxy_cache_key directive. The
issue is when the if condition is not satisfied and hence the $cache_key is
not set, I was expecting the caching to get disabled altogether as
proxy_cache_key was now being passed a uninitialized variable as parameter.

Thanks,
Vinay
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