Elixir Plug Cowboy Example

recurly_bot.ex

defmodule RecurlyBot do
  use Application

  # See http://elixir-lang.org/docs/stable/elixir/Application.html
  # for more information on OTP Applications
  def start(_type, _args) do
    import Supervisor.Spec, warn: false

    # Define workers and child supervisors to be supervised
    children = [
      # Starts a worker by calling: RecurlyBot.Worker.start_link(arg1, arg2, arg3)
      Plug.Adapters.Cowboy.child_spec(:http, RecurlyBot.Router, [], [port: 4001])
    ]

    # See http://elixir-lang.org/docs/stable/elixir/Supervisor.html
    # for other strategies and supported options
    opts = [strategy: :one_for_one, name: RecurlyBot.Supervisor]
    Supervisor.start_link(children, opts)
  end
end

router.ex

defmodule RecurlyBot.Router do
  use Plug.Router

  plug :match
  plug :dispatch

  def start_link do
    Plug.Adapters.Cowboy.http(Plugger.Router, [])
  end

  get "/" do
    conn
    |> send_resp(200, "Plug!")
  end

  defp parse_webhook(conn) do
    {:ok, body, conn} = Plug.Conn.read_body(conn)
    # return a Plug response here
  end
end