Ruby on Rails equivalent of filepart

I posted in the Ruby forum by mistake :frowning: This is actually in Rails.

I’m looking for a Ruby equivalent of Java’s Jakarta HTTP FilePart.

I basically need to send out a post request that contains an uploaded
file to a REST API.

Now the client code that they normally use is Jakarta. Whose
definition of a multipart post containing a file is here:
http://jakarta.apache.org/commons/httpclient/methods/multipartpost.html

I need help to do this in Ruby. Anyone has nay thoughts on this?
Sid.