Elixir Plug request_url function.

plug_conn_request_url.ex

defmodule Plug.Conn.RequestURL do
  def request_url(conn) do
    Enum.join([
      conn.scheme,
      "://",
      conn.host,
      shown_port(conn.scheme, conn.port),
      conn.request_path,
      shown_qs(conn.query_string),
    ])
  end

  defp shown_port(:http, 80), do: ""
  defp shown_port(:https, 443), do: ""
  defp shown_port(_, port), do: ":#{port}"

  defp shown_qs(""), do: ""
  defp shown_qs(qs), do: "?#{qs}"
end

Became: elixir-plug/plug#588