requestify

# File actionpack/lib/action_controller/integration.rb, line 353
        def requestify(parameters, prefix=nil)
          if TestUploadedFile === parameters
            raise MultiPartNeededException
          elsif Hash === parameters
            return nil if parameters.empty?
            parameters.map { |k,v| requestify(v, name_with_prefix(prefix, k)) }.join("&")
          elsif Array === parameters
            parameters.map { |v| requestify(v, name_with_prefix(prefix, "")) }.join("&")
          elsif prefix.nil?
            parameters
          else
            "#{CGI.escape(prefix)}=#{CGI.escape(parameters.to_s)}"
          end
        end