On Thu, Jun 4, 2015 at 10:56 AM, Jason Woods <devel@jasonwoods.me.uk> wrote:

An HTTP/1.1 server SHOULD include a Vary header field with any
> cacheable response that is subject to server-driven negotiation.
> Doing so allows a cache to properly interpret future requests on that
> resource and informs the user agent about the presence of negotiation on that resource.
>
>
You are right, and the section about server-driven negotiation

http://tools.ietf.org/html/rfc2616#page-72

explicitly mentions Accept-Encoding as an example. So case closed.

Next question is: why is gzip_vary off by default? Isn't the most common
case that you want it enabled?

Xavier

PS: In my next reencarnation I promise to only work on specs written as
axiomatic systems.
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