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 for stale 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
