- From: Jeffrey Mogul <Jeff.Mogul@hp.com>
- Date: Wed, 28 Apr 2004 15:32:53 -0700
- To: Jamie Lokier <jamie@shareable.org>
- Cc: Justin Chapweske <justin@chapweske.com>, lisa@osafoundation.org, ietf-http-wg@w3.org
Is there a binary delta format being used, or planned, for delta
transmission of cached documents?
What I mean is that if I have a cached entity with etag "abcdefg", and
I request it with If-None-Match, then maybe a server or cache could
send me the delta between what I have and the current entity - just to
reduce bandwidth.
If there's such a standard being proposed or even still being
designed, it would probably be good to pick the same binary delta
format.
IETF Proposed Standards:
RFC3229: Delta encoding in HTTP
http://www.ietf.org/rfc/rfc3229.txt
RFC3284: The VCDIFF Generic Differencing and Compression Data Format
http://www.ietf.org/rfc/rfc3284.txt
RFC3229 lists a few other possible formats, but vcdiff seems
to be the consensus (among experts in the area) for the best
choice.
-Jeff
Received on Wednesday, 28 April 2004 18:35:06 UTC