Plugifying our HTTP server

To leverage the power of Plug for routing, error handling, and other uses, let’s define a Plug adapter for the Goldcrest.HTTPServer package.

Let’s start by defining a new package, plug_goldcrest_http_server:

$ mix new plug_goldcrest_http_server --module Plug.Goldcrest.HTTPServer

Now, let’s add :goldcrest_http_server and plug to our Mix dependencies:

lib/plug/goldcrest/http_server/conn.ex

defmodule Plug.Goldcrest.HTTPServer.MixProject do
  use Mix.Project
  # ..
  defp deps do
    [
      {:goldcrest_http_server, "~> 0.0.1"},
      {:plug, "~> 1.12.1"}
    ]
  end
end

Now, we can fetch the dependencies by running the following command:

$ mix deps.get

In this newly generated mix project, we can start by defining an adapter for Plug.Conn. Let’s...