On Thu, Oct 4, 2018 at 12:09 PM Evgeny Kotkov <[email protected]>
wrote:

>
> However, a more important question is whether there is an actual problem to
> solve.  I see that ap_http_header_filter() features a whitelist of headers
> that are sent for 304 responses (http_filters.c:1428), and all headers such
> as Content-Encoding are filtered anyway.
>

AIUI Transfer-* headers should be filtered. Content-* headers must match
the specific ETag as if the response was 200, from my reading.

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