fastcgi_cache_key with cookie

António P. P. Almeida appa at
Tue Dec 27 08:01:04 UTC 2011

On 27 Dez 2011 07h46 WET, nginx-forum at wrote:

> I've also tried this using the userid module I set a custom cookie
> like so
> userid on;
> userid_name "testid";
> userid_expires 100s;
> and set the fastcgi_cache_key like so
> fastcgi_cache_key
> $cookie_testid$request_method$scheme$host$request_uri
> the problem with this setup is when I login or logout, since the key
> is based on only $cookie_testid without $http_cookie, then the user
> will still see the logged in page even after logging out.
> Alternatively how would I user the cache purge module to purge the
> key when the user hits the login or logout button? this is the
> sample config

 I think you can do it with map. Untested:

map $http_cookie $logged_in {
    default 0;
    ~SESS 1;

Define two locations each with a different cache (anon/authenticated):

The default cache is the anon:

location @anon-cache {
    error_page 418 @auth-cache;
    if ($logged_in) {
        return 418;
    userid_expires 0s;
  ... # fastcgi cache stuff for anon users

location @auth-cache {
    # set the user id expires here to a positive value      
    # fastcgi cache for authenticated users

I never played with the userid module. So...

--- appa

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