RestClient posting multipart issue - RestClient::Found Exception: 302 Found

Rails
1

I thought I found how to post a file to my controller for PaperClip
attachment processing , but I am stuck with the the RestClient
processing

I am creating the file from the email attachment :
file = StringIO.new(part.decoded)
file.class.class_eval
{ attr_accessor :original_filename, :content_type }
file.original_filename = part.filename
file.content_type = part.mime_type

then adding some parameters

fields_hash = {:clip => {:description => “uploaded file”, :name =>
‘test’, :file => file }, :email_upload => true}

setting the url => “http://localhost:3000/en_GB/users/clips”

@url = “http://#{Rails.configuration.host}/#{locale}/users/clips”

and finally sending the request

response = RestClient.post @url , fields_hash

and I get RestClient::Found Exception: 302 Found

what could be wrong ?

the form used in the clip create action is