# File lib/oauth_active_resource/resource.rb, line 70
    def self.send_multipart_request(method,path,file_param_name,file,params={})
      req = Net::HTTP::Post.new(path)
      if method == :put
        params[:_method] = "PUT"
      end
      post_file = Net::HTTP::FileForPost.new(file)
      req.set_multipart_data({file_param_name => post_file},params)     

      oauth_connection.sign!(req)                  
      uri = URI.parse oauth_connection.consumer.site      
      
      res = Net::HTTP.new(uri.host,uri.port).start do |http|
        http.request(req)
      end
      res
    end