proxy_cache_purge for nginx/0.8.34

[skynet]

That is a dummy IP.

Now, seeing is believing -- I gave it another try and it actually gave me the response similar to the screenshot.
Not sure why but it is very sporadic. I believe that, if cache file doesn't exist response is still 404.
Of course, the cache file exists, therefore question is - why so sporadic.
Wouldn't be helpful to return a message "cache file does not exists" instead of a 404. 

Thanks again.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,61318,63901#msg-63901