mix.exs

defmodule NuntiusOpera.Mixfile do
  use Mix.Project

  def project do
    [app: :nuntius_opera,
     version: "0.0.1",
     elixir: "~> 1.0",
     build_embedded: Mix.env == :prod,
     start_permanent: Mix.env == :prod,
     deps: deps]
  end

  def application do
    [applications: [:logger, :ssl, :erlcloud],
     mod: {NuntiusOpera, []}]
  end

  defp deps do
    [
      {:erlcloud, "~> 0.9.2"}
    ]
  end
end

worker.ex

defmodule NuntiusOpera.Worker do
  def setup_aws do
    aws_access = System.get_env("AWS_ACCESS_KEY_ID") |> String.to_char_list
    aws_secret = System.get_env("AWS_SECRET_ACCESS_KEY") |> String.to_char_list
    # char list because elixir doesnt like strings, in the normal form
    :erlcloud_s3.configure(aws_access, aws_secret)
  end

  def create_bucket(name) do
    setup_aws
    :erlcloud_s3.create_bucket(name)
  end

  def set(bucket, k, v) do
    setup_aws
    :ercloud_s3.put_object(bucket, k, v)
  end

  def get(bucket, k) do
    setup_aws
    :erlcloud_s3.get_object(bucket, k)[:content]
  end

  def ls_keys(bucket) do
    setup_aws
    objs = :erlcloud_s3.list_objects(bucket)
    for obj <- objs[:contents], do: obj[:key]
  end
end