Re: Calculating Age Question

> So when the User Agent receives the response, the Age value 
> should be 13? Basically, at each cache, the Age value will 
> be increased by the response_delay of that cache (plus 
> resident_time if applicable). 

Regardless of what it says in the spec, the Age value is not touched
by the cache unless resident_time > 0.  In other words, a cache does
not age a response that it has never had in its possession.  It is only
when resident_time > 0 (the response is coming from the cache and
not from an upstream server) that the cache sets the Age value in
the message.

 ...Roy T. Fielding
    Department of Information & Computer Science    (fielding@ics.uci.edu)
    University of California, Irvine, CA 92697-3425    fax:+1(714)824-4056
    http://www.ics.uci.edu/~fielding/