Re: Alt-Svc across a domain?

On Fri, Apr 8, 2016 at 2:31 PM, Ryan Hamilton <rch@google.com> wrote:

> Howdy,
>
> It is common for web sites to serve content from a variety of different
> origins within the same domain. For example, www.example.com,
> accounts.example.com, images.example.com. A single page view may require
> loading resources from several such origins. (Tricks like domain sharing
> can exacerbate this proliferation of origins.) It would be great if the
> service had some way to tell the client, "All of my domains can use this
> alternative service". What would folks thinks of an include-subdomains
> parameter in the Alt-Svc value? If such a parameter were present in an
> Alt-Svc advertisement, a client could use this advertisement to apply to
> any sub-domain of the origin that the client does not already have an
> alternative for. This would avoid the need to discover the alternatives
> individually.
>
>
the server can send, unsolicited, on stream 0 an altsvc frame for each
origin it wants to provide alt-svc info for (the connection needs to be
authoritative for those origins, of course).

yesterday's discussion of adding certificates to an established connection
would make that more powerful.

I would encourage h1 servers to update to h2 to get this feature :)

-P



> Cheers,
>
> Ryan
>