[edit] proxy_cache_key

Syntax: proxy_cache_key string
Default: $scheme$proxy_host$request_uri
Context: http
server
location
Reference: proxy_cache_key


The directive specifies what information is included in the key for caching, for example

proxy_cache_key "$host$request_uri$cookie_user";

Note that by default, the hostname of the server is not included in the cache key. If you are using subdomains for different locations on your website, you need to include it, e.g. by changing the cache key to something like

proxy_cache_key "$scheme$host$request_uri";

Module: HttpProxyModule