Hello everybody,


I have the following working scheme:

Client --> Nginx [caching] --> Apache [backend]


Sometime the backend returns headers, which I want to modify before
nginx caching engine decides how to treat them. One such example is when
backend returns Vary: header.


I want to achieve the following:


[Apache backend returns Vary: User-Agent, Header2] --> [Nginx Modifies
"Vary:" and removes User-Agent] --> [Nginx caching sees only 'Vary:
Header2' (without User-Agent)] --> The final result is that Nginx cache
wont take 'User-Agent' into vary considerations. (no cache object per UA).

That's just an example. I would like to do such modification with other
headers also (for example Cache-Control).

Currently I'm already using Nginx Lua integration, but there is no hook
point before the caching engine.


Would be happy for any suggestions about achieving this scenario.


Regards

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