RE: ETag Validiation?

From: Alex Rousskov <>
Date: Wed, 21 Oct 1998 00:45:57 -0600 (MDT)

On Wed, 21 Oct 1998, Nottingham, Mark (Australia) wrote:

> As far as I can tell, an ETag request header is invalid; 14.9 states only
> that it is a response header.

ETag is an entity header. As such, it can be used in a request.
> AFAIK, you won't see much If-None-Match traffic at all; no clients seem to
> support Etags (I may be wrong).

Too bad if so -- less incentive for us to add ETag support.

> However, the specification doesn't preclude
> (and actually encourages, in my understanding) caches using ETags as
> validators when they're available.


> As TODO notes, it will mean storing more metainformation.

That remains to be seen. Clearly some ETag applications will require more
metadata, but maybe not all. We can make such suport #conditional and/or
optimize it somehow...

Received on Wed Oct 21 1998 - 00:46:34 MDT

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