Re: alt-svc issue 43: ALPN identifiers in Alt-Svc

On 04/30/2015 04:43 PM, Julian Reschke wrote:
> (see <>)
> > ALPN identifiers from the ALPN spec have been defined in the context
> > of negotiating the application protocol in TLS. In this context, they
> > imply a layering above TLS.
> > When used outside this context, there is an ambiguity, mainly for the
> > http/1.1 token: does it refer to HTTP/1.1 over TLS, or can it refer
> > also to HTTP/1.1 over TCP?
> > The draft should resolve this ambiguity by stating that the http/1.1
> > identifier is used to identify HTTP/1.1 over TLS.
> Right now we do not mention "http/1.1" at all. Should that change?
I think we should remove the ambiguity to make clear that http/1.1 is over TLS.
> > In addition, a new identifier, h1c for example, could be defined to
> > identify HTTP/1.1 over cleartext TCP, in order to allow using Alt-Svc
> > to be used to target an HTTP/1.1 server over cleartext TCP.
> Is this a use case we want to address?
I think there is a general sense that we should not define such an identifier to instead promote the usage of TLS.
> Best regards, Julian
Best regards,


Received on Thursday, 30 April 2015 15:23:56 UTC