[Doh] Support requirements for Head

Stephane Bortzmeyer <bortzmeyer@nic.fr> Sun, 18 March 2018 13:13 UTC

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Date: Sun, 18 Mar 2018 13:11:39 +0000
From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
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Subject: [Doh] Support requirements for Head
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On Sat, Mar 17, 2018 at 12:27:09PM +0000,
 Ólafur Guðmundsson <olafur@cloudflare.com>; wrote 
 a message of 56 lines which said:

> Based on experience at the IETF101 Hackathon this issue came up.

A related issue is HEAD support. Today, one implementation rejects
both GET and HEAD (405), one accepts GET but HEAD triggers a 400
(probably a bug, reported).

My personal opinion is "if you support GET, you MUST support
HEAD". Any HTTP advice? (Technically, it's nothing, the vast majority
of DoH clients and servers already handle HEAD.)