Hello!
On Sun, Mar 15, 2026 at 01:24:01PM +0100, Christoph Liebender via nginx wrote:
> Hello nginx@,
>
> I recently learned about the add_header_inherit directive of nginx 1.29.3,
> and was suprised to see that my freenginx (build config below) does not
> support it. Is that to be expected?
Yes, that's expected.
New features from F5 NGINX are not automatically merged into
freenginx. Rather, they are considered - if there is a developer
who is willing to do the merge and improve the code if there are
questions and/or issues identified during the review. Overall,
freenginx development is completely separate from what F5 does.
Further, this particular directive is considered to be a
misfeature, which breaks normal inheritance logic in unpredictable
ways, and it is unlikely to be ever merged.
If you are interested in developing some functionality to improve
add_header merging, I would recommend focusing on alternative
solutions, such as a one-time way to inherit headers along with
the ones specified on the current level, something like:
add_header inherit;
add_header X-Foo bar;
Ideally, this should be a more or less universal solution for all
array-type directives.
--
Maxim Dounin
http://mdounin.ru/
