[squid-users] Denying write access to the cache

Hi all,

We're using Squid as a reverse proxy for a couple of years now. We're
currently migrating to Squid 2.6 and we're really satisfied of all the
enhancements of this version, especially the fact that we can use a
lot of features previously reserved to the proxy configuration.

Our context is a bit special :
- we have _a lot_ of traffic generated by robots (googlebot and so on) ;
- the problem is that they visit a lot of pages on our site we don't
really want to keep in cache (nobody else really visits them - for
instance, the events in a very small city) ;
- we want the robots to use the cache generated by the other users so
we can't simply deny cache access to robots.

After this introduction, here is my question: is there any way to deny
the write access to the cache? I'd like to be able to say: all these
user agents can use the cache but don't write anything in it.
I don't find anything to do this sort of things.

Thanks for any ideas.

--
Guillaume