Re: Cache control in trailers?

On Fri, 5 Feb 2021 at 09:41, Julian Reschke <julian.reschke@gmx.de> wrote:

>
> Note: "Etag" is already marked as acceptable in trailers
> (<https://github.com/httpwg/http-core/issues/262>).
>

Sure, but one of the suggestions to come out of this thread is that it
might be valuable to put something in the header to say that the final
value will be in the trailers.   This could be for an individual header (eg
Willy suggested Cache-Control: no-cache; trailers)  or a more general
mechanism like the 3xx proposal.

So in the case of Etag, would it be worthwhile for cache implementers to
know that the content they are currently receiving will/may have an etag in
the trailers?    If so, that suggests a more general mechanism for
hinting at the contents of the trailers is needed.

It is hard to focus on actual solutions whilst the scope of the issue is
not resolved.

cheers

-- 
Greg Wilkins <gregw@webtide.com> CTO http://webtide.com