multipart-parser

https://github.com/danabr/multipart-parser

multipart-parser is a simple parser for multipart MIME messages, written in Ruby, based on felixge/node-formidable's parser. Some things to note: - Pure Ruby - Event-driven API - Only supports one level of multipart parsing. Invoke another parser if you need to handle nested messages. - Does not perform I/O. - Does not depend on any other library.