Cache object
- obj.age —Total age of the object
- obj.cacheable —Whether the object is cacheable
- obj.entered —Time since the object was created
- obj.grace —Use
obj.stale_if_errorinstead - obj.headers —Collection of HTTP headers for a request
- obj.hits —Number of hits for an object
- obj.http.{NAME} —HTTP headers stored for an object
- obj.is_pci —Whether the object is prevented from being stored in non-volatile memory
- obj.lastuse —Time since the object was last requested
- obj.proto —HTTP protocol and version stored for an object
- obj.response —HTTP response phrase stored for an object
- obj.stale_if_error —Maximum age to serve stale for a cached object
- obj.stale_while_revalidate —Maximum age forstale while revalidate
- obj.status —HTTP status code stored for an object
- obj.ttl —Amount of time the object should be cached for
- req.digest —Digest (hash) of the currently served object
- req.digest.ratio —Digest ratio for conditionally handling a percentage of cached objects
- req.hash —Add an item to the cache key
- stale.exists —Whether a stale version of the requested object is available
