Re: New Version Notification for draft-nottingham-cache-header-00.txt

[Thomas Peterson <[e-mail]>]

I'm very much in favour of this, thanks Mark.

However, the draft doesn't expose a cache-action where a previous request is causing an update in still progress and is serving stale (for example, this is defined in nginx's UPDATING state). I think this should be added, perhaps as "HIT_REFRESH_UPDATING".

Also, no server I've found exposes a value that aligns with "ERROR", how might a 502/504 response code correlate to this, and should this draft specify these response codes be used as a 200 OK along with cache-action of "ERROR" doesn't make sense to me.

Regards



From: Mark Nottingham <[e-mail]>
Date: Friday, 7 September 2018 at 07:48
To: HTTP Working Group <[e-mail]>
Subject: Fwd: New Version Notification for draft-nottingham-cache-header-00..txt
Resent-From: <[e-mail]>
Resent-Date: Fri, 07 Sep 2018 06:45:18 +0000

FYI; IMO it's past time to standardise x-cache and have a real spec for it. 

This is a straw-man, based on a bit of research on existing implementations..

Pretty version at:
  https://mnot.github.io/I-D/cache-header/

Comments? I think the primary audience here is proxy cache and CDN vendors, and their users.

Cheers,




Begin forwarded message:

From: mailto:[e-mail]
Subject: New Version Notification for draft-nottingham-cache-header-00.txt
Date: 7 September 2018 at 4:41:52 pm AEST
To: "Mark Nottingham" <mailto:[e-mail]>


A new version of I-D, draft-nottingham-cache-header-00.txt
has been successfully submitted by Mark Nottingham and posted to the
IETF repository.

Name:		draft-nottingham-cache-header
Revision:	00
Title:		The Cache HTTP Response Header
Document date:	2018-09-07
Group:		Individual Submission
Pages:		7
URL:            https://www.ietf.org/internet-drafts/draft-nottingham-cache-header-00.txt
Status:         https://datatracker.ietf.org/doc/draft-nottingham-cache-header/
Htmlized:       https://tools.ietf.org/html/draft-nottingham-cache-header-00
Htmlized:       https://datatracker.ietf.org/doc/html/draft-nottingham-cache-header


Abstract:
  To aid debugging, HTTP caches often append headers to a response
  detailing how they handled the request.  This specification codifies
  that practice and updates it for HTTP's current caching model.




Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at http://tools.ietf.org.

The IETF Secretariat

--
Mark Nottingham   https://www.mnot.net/