- From: Mark Nottingham <mnot@mnot.net>
- Date: Fri, 20 Jul 2012 15:25:04 +1000
- To: HTTP Working Group <ietf-http-wg@w3.org>
Bruce Perens isn't on the mailing list, so forwarding (a dup may occur when W3C staff see it): Begin forwarded message: > > Hi Adrien, > > I use ETag because of an insufficiency in RFC 2616 dates: their > resolution is one second. Updates to entities at sub-second intervals > are possible and would result in entities with the same Last-Modified > date. To be pedantically resolution-independent, I convert the date/time > to a string representation of a ratio. It's presently the number of > nanoseconds since the epoch. I encode that and an entity serial number > in the ETag. > > If HTTP dates are extended to have sub-second resolution, I will > probably be able to do without ETags. > > Thanks > > Bruce > -- Mark Nottingham Systems Architect, Cloud Standards and APIs mark.nottingham@rackspace.com http://www.mnot.net/ -- Mark Nottingham http://www.mnot.net/
Received on Friday, 20 July 2012 05:25:32 UTC