Name says it all: it is not dumb simple to create distributed hash table redundant storage over multiple nodes with HTTP data access.

Data is uploaded using POST method through special FastCGI application, which is linked with elliptics network library and writes data into the storage according to its config file (one can specify data redundancy there for example).

Data receiving is rather different idea - FastCGI application described above only lookups requested object in the network and returns direct URL to appropriate storage server. It has to be configured according to some standards (like data must be placed in subdirs, indexed by the parameter, which is equal to appropriate elliptics network port minus FCGI_DNET_BASE_PORT config option, i.e. if there are two elliptics nodes (for two disks for example) running on 1025 and 1026 ports, FCGI_DNET_BASE_PORT config parameter being set to "1024" and single web server, its document root should contain subdirs 1 and 2 (1025-1024 and 1026-1024).
There is bunch of other useful config parameters, although there is no authentification or any kind of permission checks yet.

Anyway, here is a changelog:

• Added FastCGI daemon to handle GET (returns direct URL via redirect or XML) and POST requests
• Extended lookup to optionally check whether requested object is stored locally
• Added lighttpd fastcgi config
• Bug fixes

I deployed small storage total of 1 Tb of data spread over 4 physical machines with 2 elliptics node on each (one per storage disk) and uploaded 60 gb of data there (about 3-4 thousans of files and each one has additional copy).

Upload is rather trivial:

wget --post-file=$file http://base_fast_cgi_host.net/name.mp3?name=$some_file_name

You might expect that file downloading will be as simple as

wget http://base_fast_cgi_host.net/name.mp3?name=$some_file_name

and you will be absolutely right, that it will redirect you to some server inside storage cloud via direct link to the requested object.

Also added files to make debian packages. This even works.

Full changelog is available in git tree.

That's it, enjoy!