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trailing_format_plug

0.0.1
0.0.7 0.0.6 0.0.5 0.0.4 0.0.3 0.0.2 0.0.1

An elixir plug to support legacy APIs that use a rails-like trailing format: http://api.dev/resources.format

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trailing_format_plug lib trailing_format_plug.ex
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lib/trailing_format_plug.ex 

defmodule TrailingFormatPlug do

  import Plug.Conn



  def init(options), do: options



  def call(conn, opts) do

    conn.path_info |> List.last |> String.split(".") |> Enum.reverse |> case do

      [ _ ] -> conn

      [ format | fragments ] ->

        new_path       = fragments |> Enum.reverse |> Enum.join(".")

        path_fragments = List.replace_at conn.path_info, -1, new_path

        params         = Plug.Conn.fetch_params(conn).params

                         |> Dict.put("format", format)

        %{conn | path_info: path_fragments, params: params}

    end

  end

end