[Doh] Support requirements for Get and Post

Ólafur Guðmundsson <olafur@cloudflare.com> Sat, 17 March 2018 12:27 UTC

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Date: Sat, 17 Mar 2018 12:27:09 +0000
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Subject: [Doh] Support requirements for Get and Post
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Based on experience at the IETF101 Hackathon this issue came up.

dns-over-https-03 draft is silent on the topic if Get and Post are both
required or implementations can only support one of them.

I would like to see a section like this added to the document:

Implementation requirements

Post MUST be supported Get MAY be supported, when GET is not supported the
error code retuned should be 405 (HTTP RFC 7321, section 6.5.5).

Reasoning: In many web servers POST is not logged but GET is. Thus from a
privacy point of view clients that do not want to have their queries logged
by servers stand a better chance by using POST.

Olafur