if-none-match with proxy_cache : properly set headers

[quoter]

Maxim Dounin Wrote:
-------------------------------------------------------
> Normally you shouldn't cache 304 responses from a backend, but 
> rather cache 200 responses from a backend and let nginx to return 
> 304 by its own.  This is how it works by default.
> 
> Do you have problems with the default aproach?
> 
> -- 
> Maxim Dounin
> http://nginx.org/en/donation.html
> 
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Yes I do have some problems with this approach. In our nginx config we use
also option "fastcgi_cache_min_uses 5". So response body appears in cache
only after 5 user requests. But for our production purposes it is extremely
important to return 304 if client response has valid If-None-Match.

---
Dmitry Sukhov
quoter at yandex-team.ru

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,239689,251853#msg-251853