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Re: Expire header modification by by Squid

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: 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

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