Paperclip-storage-engine is a project mainly written in Python, it's free.
Google Appengine storage support for paperclip
h1. Paperclip Storage Engine
Google Appengine storage support for paperclip
h2. Install
h2. Api
get /:attachment_id/[:filename] filename is not required but allows nicer urls
post (create or update attachment based on attachment_id) attachment_id (must be unique) content_type ** data (file field)
delete ** attachment_id
h2. Authorization
uses header Authorization for hmac(sha256) shared_secred based authorization