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Re: New Version Notification for draft-thomson-http-hx-uri-00.txt

From: Stefan Eissing <stefan.eissing@greenbytes.de>
Date: Wed, 6 Mar 2019 10:17:29 +0100
Cc: ietf-http-wg@w3.org
Message-Id: <F145BEFA-A15E-44B7-9906-2B251260CEAD@greenbytes.de>
To: Martin Thomson <mt@lowentropy.net>

> Am 05.03.2019 um 03:27 schrieb Martin Thomson <mt@lowentropy.net>:
> This is a crazy idea that has been brewing for a while.  This describes an identification scheme that might allow for some interesting optimizations of common API patterns.  Hopefully there is enough in the draft to stimulate thoughts about how HTTP might evolve.

Wild and interesting. Looking at this from a server perspective:

This seems to assume that the connection, as seen by the client, looks the same on the server component processing this. At least in order to identify 'previous' requests. This is problematic in clusters, ssl terminators, and reverse proxies (connections to backend may come and go during a the lifetime of a frontend connection).

The references seem to go back in time only, at least in the examples. This would require a server to keep a lot of information about previous requests available. It would be much easier to process hx: uris that refer to requests in the future. So, a client would build up a sort of quantum state of hx: uris in the server (or an intermediate) and the real request(s) afterwards collapses it. This could at least work in HTTP/2(+).


> Though it touches on the a common concept, this is not related at all to the signed exchanges work.
> ----- Original message -----
> From: internet-drafts@ietf.org
> To: Martin Thomson <mt@lowentropy.net>
> Subject: New Version Notification for draft-thomson-http-hx-uri-00.txt
> Date: Tuesday, March 05, 2019 13:23
> A new version of I-D, draft-thomson-http-hx-uri-00.txt
> has been successfully submitted by Martin Thomson and posted to the
> IETF repository.
> Name:		draft-thomson-http-hx-uri
> Revision:	00
> Title:		Identifying HTTP Exchanges with URIs
> Document date:	2019-03-05
> Group:		Individual Submission
> Pages:		18
> URL:            https://www.ietf.org/internet-drafts/draft-thomson-http-hx-uri-00.txt
> Status:         https://datatracker.ietf.org/doc/draft-thomson-http-hx-uri/
> Htmlized:       https://tools.ietf.org/html/draft-thomson-http-hx-uri-00
> Htmlized:       https://datatracker.ietf.org/doc/html/draft-thomson-http-hx-uri
> Abstract:
>   URI schemes are defined that enable identification of HTTP exchanges,
>   or parts of those exchanges.
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
> The IETF Secretariat
Received on Wednesday, 6 March 2019 09:17:56 UTC

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