Re: If-Modified-Since enhancement

Ari Luotonen (
Tue, 22 Mar 1994 10:33:56 --100

> Sorry for the late response (it's Monday here in California)

Sorry, I lost my sense of time 'cause I was working the whole weekend
and didn't realize it was only the first working day after my original

> The only headers which should be sent are
> Date:
> Server:
> Expires:

You're right. How about saying:

Response headers are as if the client had originally sent a HEAD
request, but not all the headers need to be present, only the ones
that make sense in this context. That means all the headers that
are relevant to cache managers, like Expires: and Date:.

The purpose of this feature is that the server can upload a new expiry
date and other necessary metainformation to the requesting client
(often a caching proxy). This is to allow fast update of caches.

-- Cheers, Ari --