Nginx for serving directly from cache

Simple route (preferred): Softlinks + nginx rewrite rules

• Rewrite static URL to serve directly from a softlinked nginx static cache

/var/tmp/omnic/nginx_cache/9f/2e/4f/..etc/9f2e4f -> /var/tmp/omnic/resource/.../file.jpg

Add complex rewrite rules that md5 the incoming URL or parts of it and then redirect to the nginx cache, which is populated at the end of every successful conversion step.

• http://blog.pixelastic.com/2013/09/27/understanding-nginx-location-blocks-rewrite-rules/

• https://forum.nginx.org/read.php?2,31852

Complex route (if necesary) OpenResty

OpenResty script that uses same hashing algo as python to very quickly serve up files with nginx BEFORE they even hit Omnic servers

• Don't worry about HMAC digests (although maybe 404 obviously bogus requests), since cache miss will happen anyway

• Should be VERY short logic: Just take URL parameter, apply MD5 transformation, check cache location, if exists AND read-only, serve file, else fallback to omnic

Start by tracing the successful conversion step that populates /var/tmp/omnic/nginx_cache/ and compare its Python hashing algorithm with the requested nginx rewrite approach. Evaluate the simple softlink and rewrite route before considering the OpenResty fallback. Done means valid cache hits are served directly and misses fall back to Omnic without changing conversion behavior.