NGINX + lua + Hashing for asset server upload

[pharaun]

I have found a lots of resources on this:

1. https://github.com/openresty/lua-resty-upload
2. https://github.com/pgaertig/nginx-big-upload
3. http://stackoverflow.com/questions/22461341/nginx-1-5-file-upload-best-practices
4. http://leafo.net/posts/creating_an_image_server.html
5. http://bl.ocks.org/justincormack/948423

Anyway the basic outline is:

1. We are going to need nginx with lua/luajit compiled in.
2. Since we don't want to buffer the entire file in memory we are going to need a way to store it in a temp location on disk till we have a complete hash of the file then we can move it.
3. nginx+lua supports file-upload so we can make it as trivial as curl --binary-data file.foo http://resource/uri for uploading new content/new versions :)

So what we need to do:

1. Compile nginx with lua and maybe some of the lua framework
2. Setup a basic file-send/share directory with the uri + hash (ie asset/game1/logic.lua/) for fetching that specific file+version
3. Add in a hook for PUT/POST to the asset uri (PUT asset/game1/logic.lua) which will store the file in a temp loc, and generate the hash, move it into the final loc, return the hashed uri/hash.
4. Can later have lua ping the specific game-server and be like yo you got a new version of X asset.