tree 3cf6108d0daf072726805e4379fde73af0818201
parent df2fc6a9df06dcf334000a66c1173413883e1aba
author Maxim Dounin <mdounin@mdounin.ru> 1384793302 +0400
committer Maxim Dounin <mdounin@mdounin.ru> 1384793302 +0400

Upstream: cache revalidation with conditional requests.

The following new directives are introduced: proxy_cache_revalidate,
fastcgi_cache_revalidate, scgi_cache_revalidate, uwsgi_cache_revalidate.
Default is off.  When set to on, they enable cache revalidation using
conditional requests with If-Modified-Since for expired cache items.

As of now, no attempts are made to merge headers given in a 304 response
during cache revalidation with headers previously stored in a cache item.
Headers in a 304 response are only used to calculate new validity time
of a cache item.