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Re: [core] Tossing around URIs to use outside an application

Thomas Fossati <Thomas.Fossati@arm.com> Mon, 17 May 2021 16:05 UTC

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From: Thomas Fossati <Thomas.Fossati@arm.com>
To: Michael Richardson <mcr+ietf@sandelman.ca>, Christian Amsüss <christian@amsuess.com>, "core@ietf.org" <core@ietf.org>
Thread-Topic: [core] Tossing around URIs to use outside an application
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Date: Mon, 17 May 2021 16:05:30 +0000
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Subject: Re: [core] Tossing around URIs to use outside an application
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On 17/05/2021, 16:10, "Michael Richardson" <mcr+ietf@sandelman.ca> wrote:
> Thomas Fossati <Thomas.Fossati@arm.com> wrote:
> > On 17/05/2021, 13:47, "Christian Amsüss" <christian@amsuess.com> wrote:
> > > * By comparison: on the WWW being tossed a URI is commonplace;
> > >   they are sent over all channels (text print, QR print, radio
> > >   announcements etc), and usable by virtue of DNS+PKI.
> > >
> > > They are usable without metadata. If a browser was given a URI of
> > > a lock, it may ask the user to go through some login service but
> > > then serve from that URI alone.
>
> > This was probably true before QUIC and ECH.  Now an HTTPS URI needs
> > more context to be successfully dereferenced.
>
> Uhm, that's not my understanding.
> If both ends support QUIC, then the HTTPS is replaced with QUIC,
> otherwise it continues with HTTPS.

Even if you support QUIC, the trouble with an HTTPS URI (i.e., one with
the 'https' scheme) that has been given to you is you can't know in
general whether the other end will successfully negotiate QUIC with you
or not before you actually try, which is inefficient.  The problem with
an HTTPS URI where the server endpoint is ECH capable is probably more
compelling.  In that case the client doesn't have the luxury of an
inefficient discovery that wastes a few round-trips to get the server's
public key via Alt-Svc or ALPN, it only has one shot :-)






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