Cache

Allows the cache to calculate the freshness lifetime of the request using a heuristic.

Returns true if the selecting header fields nominated by the stored response match those presented by the new request. This method is broken out into the cache functionality as section 4.1 can do transformation of header fields in non-trivial ways that cannot be anticipated by this library in order to find a match. Given the vagaries of Vary and the overall complexities of fields such as User-Agent, the assumption is that the cache knows best.

Returns true if the cache knows what to do with this cache extension, false otherwise.

In this context, a cache has "understood" a request method or a response status code if it recognizes it and implements all specified caching-related behavior.

Returns whether a status code is cacheable by default or not.

Note that in situations where the cache wants to be more conservative and ONLY cache when there is an explicit caching header, this method should always return false. See Chris Heald's position on https://blog.phusion.nl/2015/02/09/turbocaching-security-changes/ for more details.

Returns true if this is a shared cache. False indicates that this is a private cache.

In this context, a cache has "understood" a request method or a response status code if it recognizes it and implements all specified caching-related behavior.