Re: [quicwg/base-drafts] Clarify use of HTTP request with http scheme over HTTP/3 (#2439)

Lucas Pardue <notifications@github.com> Fri, 08 February 2019 16:44 UTC

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Subject: Re: [quicwg/base-drafts] Clarify use of HTTP request with http scheme over HTTP/3 (#2439)
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I might propose this comes down to a discovery problem for the proxy. What method(s) do you envisage the proxy used to decide to make an HTTP/3 connection to the authorative server? This seems related to the discussion in HTTP WG - https://github.com/httpwg/http-core/issues/194

If Alt-Svc is being used, the flow might be that the proxy attempts to make a cleartext HTTP/1.1 connection to the authoritative server and does an upgrade, as described in RFC 7838, to HTTP/3. In which case I don't think any action is required. 

If the proxy wants to opportunistically upgrade via some happy eyeballs approach described on https://github.com/httpwg/http-core/issues/194, we might want to provide guidance that either 1) it shouldn't be done for client requests with http:// or 2) that it should always be done.

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