Expires
Time when the response is no longer fresh .
Fastly reads this header from responses . It is defined by an external standard .
The
Expires
header is one of several headers that Fastly uses as a source of information when determining
how long to store something in cache for
. In general
Cache-Control
should be preferred, because it offers a greater degree of control over the
behavior of the resource once it becomes stale
in the cache.
