-----Original Message----- From: Paul Everitt [mailto:paul@digicool.com]

I _think_ that Squid has a protocol like this to allow caches to send messages to each other.

Also squid has an http accellerator mode. This is where squid answers port 80 and returns either a cache response or transparently tunnels the request onto a webserver. it works quite well. It could probably sop up quite a percentage of zope.orgs static content. Squid also obeys, better than anything else, headers from the web server. something very similar could be achieved by hooking into zhttp_server. -Michel