Hi,

I'm wondering if there is a way to instruct nginx to cache or not a
backend response based on trailing headers?

Use-case is that backend does some heavy longer running streaming work
that in some edge cases may fail midway. As the response is already
streaming I need to tell nginx to not cache that response as it is
failed. Status code is already sent and I don't think I can change it
later via trailing headers, thus, proxy_cache_valid directive seems of
no use. However, docs mention the X-Accel-Expires header that
technically could be sent as trailing header. What I don't know yet is
if nginx supports X-Accel-Expires as trailing header or if it supports
trailing headers in backend responses at all.

Or, is there another way to accomplish something like this?

--
Claudiu

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