Hi Mark, I was just reading Mike's draft and was reminded of the shape of Alt-Svc: alt-value = alternative *( OWS ";" OWS parameter ) alternative = protocol-id "=" alt-authority That doesn't fit the dictionary syntax in RFC 8941. Dictionaries can't have a value and parameters at the same time: dict-member = member-key ( parameters / ( "=" member-value )) I conclude that SF-Alt-Svc is necessary to make this fit. I don't know how to do that exactly, but it seems like you could fix the ALPN issue at the same time. Having a restriction on what ALPN we can use for future HTTP versions doesn't seem like it would be a big burden, so maybe ``SF-Alt-Svc: h3-9000;h="authority.example:443";ma=12345'' isn't so bad. On Thu, Oct 7, 2021, at 10:07, Mark Nottingham wrote: > FYI. > > This was previously hidden in the binary structured fields draft, but > it seems potentially useful for other purposes -- e.g., exposing more > fields in a structure-oriented API for HTTP (e.g., Fetch), > canonicalising fields (e.g., for Signatures), etc. > > Cheers, > > >> Begin forwarded message: >> >> *From: *internet-drafts@ietf.org >> *Subject: **New Version Notification for draft-nottingham-http-structure-retrofit-00.txt* >> *Date: *7 October 2021 at 10:05:19 am AEDT >> *To: *"Mark Nottingham" <mnot@mnot.net> >> >> >> A new version of I-D, draft-nottingham-http-structure-retrofit-00.txt >> has been successfully submitted by Mark Nottingham and posted to the >> IETF repository. >> >> Name: draft-nottingham-http-structure-retrofit >> Revision: 00 >> Title: Retrofit Structured Fields for HTTP >> Document date: 2021-10-07 >> Group: Individual Submission >> Pages: 14 >> URL: https://www.ietf.org/archive/id/draft-nottingham-http-structure-retrofit-00.txt >> Status: https://datatracker.ietf.org/doc/draft-nottingham-http-structure-retrofit/ >> Html: https://www.ietf.org/archive/id/draft-nottingham-http-structure-retrofit-00.html >> Htmlized: https://datatracker.ietf.org/doc/html/draft-nottingham-http-structure-retrofit >> >> >> Abstract: >> This specification defines how a selection of existing HTTP fields >> can be handled as Structured Fields. >> >> >> >> >> The IETF Secretariat >> >> > > -- > Mark Nottingham https://www.mnot.net/Received on Friday, 8 October 2021 04:09:58 UTC
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