tis 2009-09-15 klockan 20:27 +0800 skrev Ryan Chan: > Hello, > > On Mon, Sep 14, 2009 at 3:36 AM, Henrik Nordstrom > <hen...@henriknordstrom.net> wrote: > > sön 2009-09-13 klockan 15:24 +0800 skrev Ryan Chan: > > > >> Is that only if and only if a user press F5 in their browser, the IMS > >> will be sent? > > > > No. IMS is a cache validation and is done by caches (including browser > > caches) whenever there is access to a stale object. > > > > >From the user point of view, it means... > > 1. user press F5 (not ctrl-F5) > 2. file is expired > > am I correct.
Yes, with the addition that 1 is a forced IMS, forcing all caches to perform the revalidation, while 2 is a normal IMS where the proxy cache is allowed to satisfy the request from it's cache if fresh. Regards Henrik
