I'm not seeing where you determine if a file is present on an edge system,
the try_files directive allows you to redirect or not (locally present or
not). I don't really see a point for using (proxy)cache, the file is present
or it is not.
location / {
try_files $uri @getfrom_origin;
}
location @getfrom_origin {
proxy_pass ......;
}
Posted at Nginx Forum:
http://forum.nginx.org/read.php?2,249997,250393#msg-250393
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