Stale entry is refreshed from the origin server, and this is supportedĬonfigured.
RFC 2616 allows for the cache to return stale data while the existing That may exist between the client and server, and as a result is not To this cache only, and will not affect the operation of other caches Mod_cache can be configured to override these headersĪnd force site specific behaviour, however such behaviour will be limited Headers sent from a client in a request, or from a Under normal operation, mod_cache will respond to Mod_include filter, or optionally compressed by the Opportunity to cache content before that content is personalised by the Point in the filter stack chosen by the administrator. It becomes possible to insert the CACHE filter at a When the quick handler is switched off using the Proxy server bolted to the front of the webserver, while running within Operation, mod_cache may be thought of as a caching Processing when returning content to the client. Utilising the quick handler to bypass all per request In the default configuration, mod_cache inserts theĬaching filter as far forward as possible within the filter stack, Generator, or content proxied from another Has changed, and not when the cached entry expires.Īs a filter, mod_cache can be placed in front ofĬontent originating from any handler, including flatįiles (served from a slow disk cached on a fast disk), the output Content is only regenerated from scratch when the content Performance boost when the origin server supports conditional Stale or expired content is still fresh, and can represent a significant
RFC 2616 compliant caching provides a mechanism to verify whether Of content negotiated responses containing the Vary header. HTTP content caching filter, with support for the caching
Mod_cache implements an RFC 2616 compliant Wish to limit access by client host name, address or environment You should not enable quick handler caching for any content to which you In its default value of on, the Allow and Deny directives will be circumvented. This module should be used with care, as when the