Plug.Conn.to_uri

conn.ex

defmodule Plug.Conn do
  def to_uri(conn) do
    query = case conn.query_string do
              "" -> nil
              query -> query
            end
    %URI{
      scheme: conn.scheme |> to_string,
      host: conn.host,
      port: conn.port,
      path: conn.request_path,
      query: query
      # userinfo: "user:password" # Is Authorization always in the headers, or is that a browser thing?
      # fragment: "some url #fragment"
      # authority: "user:[email protected]:80"
    }
  end
end

conn
|> Plug.Conn.to_uri
|> URI.to_string
# https://example.com:443/path?query=lala