: Apache/PHP => Send out expire = A + 10 years => Squid => Send out expire = A
+ 0
...
: So until my program purege cache from Squid, it will keep cache in
: Squid as long as possible; on the other hand, client will request the
: latest content from Squid everytime.
if your goal really is for squid to cache until you PURGE (as opposed to
allowing every response from your originserver to specify a specific and
unique "Internal Expires" header as well as a "Public Expires" header then
you don't need to "modify" the Expires header at all.
Take a look at the options you cna specify on refresh_pattern ... using
override-expire, ignore-no-cache, ignore-private will let you cache things
according to the refresh_pattern "Min" time regardless of what headers the
server sets ... so then you set the min to 10years and you're good to go.
-Hoss
