I use this variable $upstream_cache_status added to my access log to check
the Hit Percentage. While I think you can also use it to check whether the
file is cached.
Add it to the log_format in you configure file, access every file you want
to check, and the cache status will be shown in the access log.

On Thu, Dec 30, 2010 at 10:57 PM, digger18 <nginx-forum@nginx.us> wrote:

> Hi,
> I have implemented nginx with proxy cache successfully, however, I need
> to have the ability to check if a certain file is already cached or
> not.
> Is there a way to get a list of cached files?
> Maybe another way will be to send a HEAD request which contains the file
> URI to the proxy cache server to check if a file is already in cache?
>
> Are these methods possible?
>
> Posted at Nginx Forum:
> http://forum.nginx.org/read.php?2,162263,162263#msg-162263
>
>
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>



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