Re: Questions about ALPN

Hi Mark,

SPDY and HTTP/1.1 protocol IDs are defined in the ALPN draft so that ALPN can be immediately used to negotiate the same protocols as NPN. We had originally defined an HTTP/2 protocol ID as well, but removed it from the latest versions of the draft so that the HTTPbis WG can specify the appropriate protocol ID(s).

ALPN protocol IDs are defined as opaque non-empty octet strings, which allows for a compact representation of a large number of IDs. This does not prevent the HTTPbis WG from defining US-ASCII or UTF-8 protocol IDs for use on the Web. Do you have concerns about the representation of protocol IDs in ALPN?

Cheers,

Andrei