def signed_uri(with_oauth = true)
      if signed?
        if with_oauth
          params = parameters
        else
          params = non_oauth_parameters
        end

        [uri, normalize(params)] * "?"
      else
        STDERR.puts "This request has not yet been signed!"
      end
    end
def signed_uri(with_oauth = true)
      if signed?
        if with_oauth
          params = parameters
        else
          params = non_oauth_parameters
        end

        [uri, normalize(params)] * "?"
      else
        STDERR.puts "This request has not yet been signed!"
      end
    end
URI, including OAuth parameters