HTTP2-compliant wrapper for sending iOS and Android push notifications.

Installation

Add pigeon and kadabra as mix.exs dependencies:

def deps do
  [
    {:pigeon, "~> 1.6.0"},
    {:kadabra, "~> 0.4.4"}
  ]
end

Quickstart Guides

Apple iOS (APNS)

1. Add a default worker config to your mix config. See the detailed docs for setting up your certificate and key.

   config :pigeon, :apns,
     apns_default: %{
       cert: "cert.pem",
       key: "key_unencrypted.pem",
       mode: :dev
     }

   This config sets up a default connection to APNS servers. cert and key can be any of the following:

   • Static file path
   • Full-text string of the file contents
   • {:my_app, "certs/cert.pem"} (indicates path relative to the priv folder of the given application)

   Alternatively, you can use token based authentication:

   config :pigeon, :apns,
     apns_default: %{
       key: "AuthKey.p8",
       key_identifier: "ABC1234567",
       team_id: "DEF8901234",
       mode: :dev
     }

   • :key - Created and downloaded via your developer account. Like :cert this can be a file path, file contents string or tuple
   • :key_identifier - The 10-character key identifier associated with :key, obtained from your developer account
   • :team_id - Your 10-character Team ID, obtained from your developer account

2. Create a notification packet. Note: Your push topic is generally the app's bundle identifier.

   iex> n = Pigeon.APNS.Notification.new("your message", "your device token", "your push topic (optional)")

3. Send the packet. Pushes are synchronous and return the notification with an updated :response key.

   iex> Pigeon.APNS.push(n)
   %Pigeon.APNS.Notification{device_token: "your device token",
    expiration: nil, id: "963B9FDA-EA60-E869-AAB5-9C88C8E7396B",
    payload: %{"aps" => %{"alert" => "your message"}}, response: :success,
    topic: "your push topic"}
   
   # Add an `:on_response` callback for async pushes.
   iex> Pigeon.APNS.push(n, on_response: fn(x) -> IO.inspect(x) end)
   :ok

Additional documentation: APNS (Apple iOS)

Android (FCM)

Looking for GCM? Try v0.13 or earlier.

1. Add a default worker config to your mix config.

   config :pigeon, :fcm,
     fcm_default: %{
       key: "your_fcm_key_here"
     }

2. Create a notification packet. FCM notifications support

   iex> msg = %{ "body" => "your message" }
   iex> n = Pigeon.FCM.Notification.new("your device registration ID", msg)

3. Send the packet. Pushes are synchronous and return the notification with updated :status and :response keys. If :status is success, :response will contain a keyword list of individual registration ID responses.

   iex> Pigeon.FCM.push(n)
   %Pigeon.FCM.Notification{message_id: "0:1512580747839227%8911a9178911a917",
    payload: %{"notification" => %{"body" => "your message"}}, priority: :normal,
    registration_id: "your device registration ID",
    response: [success: "your device registration ID"],
    status: :success}
   
   # Add an `:on_response` callback for async pushes.
   iex> Pigeon.FCM.push(n, on_response: fn(x) -> IO.inspect(x) end)
   :ok

Additional documentation: FCM (Android)

Amazon Android (ADM)

1. Add a default worker config to your mix config.

   config :pigeon, :adm,
     adm_default: %{
       client_id: "your_oauth2_client_id_here",
       client_secret: "your_oauth2_client_secret_here"
     }

2. Create a notification packet.

   iex> msg = %{ "body" => "your message" }
   iex> n = Pigeon.ADM.Notification.new("your device registration ID", msg)

3. Send the packet.

   iex> Pigeon.ADM.push(n)
   %Pigeon.ADM.Notification{consolidation_key: nil,
    expires_after: 604800, md5: "M13RuG4uDWqajseQcCiyiw==",
    payload: %{"data" => %{"body" => "your message"}},
    registration_id: "your device registration ID",
    response: :success, updated_registration_id: nil}
   
   # Add an `:on_response` callback for async pushes.
   iex> Pigeon.ADM.push(n, on_response: fn(x) -> IO.inspect(x) end)
   :ok

Additional documentation: ADM (Amazon Android)

Startup Configuration of Push Workers

Workers may be specified at application startup by creating a module containing functions that return zero or more configuration structures appropriate to the push service being enabled.

Specify these in your config.exs as:

config :pigeon, workers: [
  {YourApp.Pigeon, :apns_config},
  {YourApp.Pigeon, :fcm_config},
  {YourApp.Pigeon, :adm_config}
]

These should be implemented as:

defmodule YourApp.Pigeon do
  @moduledoc false

  @push_mode if(Mix.env() == :production, do: :prod, else: :dev)

  def apns_config do
    Pigeon.APNS.ConfigParser.parse(
      key: System.get_env("APNS_KEY"),
      key_identifier: System.get_env("APNS_KEY_ID"),
      team_id: System.get_env("APNS_TEAM_ID"),
      mode: @push_mode,
      name: :apns_default
    )
  end

  def fcm_config do
    Pigeon.FCM.Config.new(name: :fcm_default, key: System.get_env("FCM_SERVER_KEY"))
  end
end

If your startup configuration requires reading your configuration from a database or using another dependency that needs a database, startup is a little more complex.

1. Modify your mix.exs to not start pigeon by default:

   def deps do
     [
       {:pigeon, "~> 1.3.1", runtime: false},
       {:kadabra, "~> 0.4.4"},
       {:ecto, "~> 2.0 or ~> 3.0"}
     ]
   end

2. Modify config.exs to specify a single worker function:

   config :pigeon, workers: [{YourApp.Pigeon, :config}]

3. Modify your main application to start pigeon after your Repo has been started under your application’s supervision tree:

   def start(_type, _args) do
     children = [
       YourApp.Repo,
     ]
   
     opts = [strategy: :one_for_one, name: YourApp.Supervisor]
   
     with {:ok, sup} <- Supervisor.start_link(children, opts),
         {:ok, _} <- Application.ensure_all_started(:pigeon, :permanent) do
       {:ok, sup}
     end
   end

4. Implement your database query as part of your Pigeon module:

   defmodule YourApp.Pigeon do
     @moduledoc false
   
     alias YourApp.{PushApplication, Repo}
   
     def config_workers do
       PushApplication
       |> Repo.all()
       |> Enum.map(&build_config/1)
     end
   
     defp build_config(%{type: "apns"} = config)
       Pigeon.APNS.ConfigParser.parse(
         key: config.key,
         key_identifier: config.key_identifier,
         team_id: config.team_id,
         mode: config.mode,
         name: Atom.to_string(config.name) # This is bad, but keep it simple!
       )
     end
   
     defp build_config(%{type: "fcm"} = config) do
       Pigeon.FCM.Config.new(
         name: Atom.to_string(config.name),
         key: config.key
       )
     end
   end

Contributing

Testing

Unit tests can be run with mix test or mix coveralls.html.

Formatting

This project uses Elixir's mix format for formatting. Add a hook in your editor of choice to run it after a save. Be sure it respects this project's .formatter.exs.

Commits

Git commit subjects use the Karma style.