Firebase Admin Elixir SDK

Overview

The Firebase Admin Elixir SDK enables access to Firebase services from privileged environments (such as servers or cloud) in Elixir.

For more information, visit the Firebase Admin SDK setup guide.

Installation

• Add firebase_admin_ex to your list of dependencies in mix.exs:

defmodule YourApplication.Mixfile do
  use Mix.Project

  # Run "mix help deps" to learn about dependencies.
  defp deps do
    [
      {:firebase_admin_ex, "~> 0.1.0"},
      {:goth, "~> 0.8.0"}
    ]
  end
end

Note the goth package, which handles Google Authentication, is also required.

Next, run mix deps.get to pull down the dependencies:

$ mix deps.get

Now you can make an API call by obtaining an access token and using the generated modules.

Obtaining an Access Token

Authentication is typically done through Application Default Credentials which means you do not have to change the code to authenticate as long as your environment has credentials.

Start by creating a Service Account key file. This file can be used to authenticate to Google Cloud Platform services from any environment. To use the file, set the GOOGLE_APPLICATION_CREDENTIALS environment variable to the path to the key file. For example:

$ export GOOGLE_APPLICATION_CREDENTIALS=/path/to/service_account.json

If you are deploying to App Engine, Compute Engine, or Container Engine, your credentials will be available by default.

Usage

• Sending a WebMessage

# Obtain an access token using goth
firebase_messaging_scope = "https://www.googleapis.com/auth/firebase.messaging"
{:ok, token} = Goth.Token.for_scope(firebase_messaging_scope)
oauth_token = token.token

# Get your device registration token
registration_token = "user-device-token"

# Define message payload attributes
message = FirebaseAdminEx.Messaging.Message.new(%{
  data: %{},
  token: registration_token,
  webpush: FirebaseAdminEx.Messaging.WebMessage.Config.new(%{
    headers: %{},
    data: %{},
    title: "notification title",
    body:  "notification body",
    icon:  "https://icon.png"
  })
})

# Call the Firebase messaging V1 send API
project_id = "YOUR-FIREBASE-PROJECT-ID"
{:ok, response} = FirebaseAdminEx.Messaging.send(project_id, oauth_token, message)

• Sending a AndroidMessage

# Obtain an access token using goth
firebase_messaging_scope = "https://www.googleapis.com/auth/firebase.messaging"
{:ok, token} = Goth.Token.for_scope(firebase_messaging_scope)
oauth_token = token.token

# Get your device registration token
registration_token = "user-device-token"

# Define message payload attributes
message = FirebaseAdminEx.Messaging.Message.new(%{
  data: %{},
  token: registration_token,
  android: FirebaseAdminEx.Messaging.AndroidMessage.Config.new(%{
    headers: %{},
    data: %{},
    title: "notification title",
    body:  "notification body",
    icon:  "https://icon.png"
  })
})

# Call the Firebase messaging V1 send API
project_id = "YOUR-FIREBASE-PROJECT-ID"
{:ok, response} = FirebaseAdminEx.Messaging.send(project_id, oauth_token, message)

• Sending a APNSMessage

# Obtain an access token using goth
firebase_messaging_scope = "https://www.googleapis.com/auth/firebase.messaging"
{:ok, token} = Goth.Token.for_scope(firebase_messaging_scope)
oauth_token = token.token

# Get your device registration token
registration_token = "user-device-token"

# Define message payload attributes
message = FirebaseAdminEx.Messaging.Message.new(%{
  data: %{},
  token: registration_token,
  apns: FirebaseAdminEx.Messaging.APNSMessage.Config.new(%{
    headers: %{},
    payload: %{
      aps: %{
        alert: %{
          title: "Message Title",
          body: "Message Body"
        },
        sound: "default",
        "content-available": 1
      },
      custom_data: %{}
    }
  })
})

# Call the Firebase messaging V1 send API
project_id = "YOUR-FIREBASE-PROJECT-ID"
{:ok, response} = FirebaseAdminEx.Messaging.send(project_id, oauth_token, message)

Firebase Documentation

• Setup Guide
• Authentication Guide
• Cloud Messaging Guide

License and Terms

Your use of Firebase is governed by the Terms of Service for Firebase Services.

Disclaimer

This is not an officially supported Google product.