# -*- mode: nginx; mode: flyspell-prog;  ispell-local-dictionary: "american" -*-

### Implementation of the microcache concept as presented here:
### http://fennb.com/microcaching-speed-your-app-up-250x-with-no-n

## The cache zone referenced.
fastcgi_cache microcache;
## The cache key.
fastcgi_cache_key $scheme$request_method$host$request_uri;

## For 200 and 301 make the cache valid for 1s seconds.
fastcgi_cache_valid 200 301 1s;
## For 302 make it valid for 1 minute.
fastcgi_cache_valid 302 1m;
## For 404 make it valid 1 second.
fastcgi_cache_valid 404 1s;
## If there are any upstream errors or the item has expired use
## whatever it is available.
fastcgi_cache_use_stale error timeout invalid_header updating http_500;
## The Cache-Control and Expires headers should be delivered untouched
## from the upstream to the client.
fastcgi_ignore_headers Cache-Control Expires;
## Bypass the cache.
fastcgi_cache_bypass $no_cache;
fastcgi_no_cache $no_cache;

## To avoid any interaction with the cache control headers we expire
## everything on this location immediately.
expires epoch;

## If you're using a Nginx version greater than 1.1.11 then uncomment
## the line below. See:
## http://nginx.org/en/docs/http/ngx_http_fastcgi_module.html#fastcgi_cache_lock
## Cache locking mechanism for protecting the backend of too many
## simultaneous requests.
#fastcgi_cache_lock on;
## The default timeout, i.e., the time to way before forwarding the
## second request upstream if no reply as arrived in the meantime is 5s.
#fastcgi_cache_lock_timeout 8000; # in miliseconds.