push-receiver

A library to subscribe to GCM/FCM and receive notifications within a node process. v2 is compatible with the latest FCM registration endpoints.

The original push-receiver FCM registration endpoint has been deprecated and removed as of June 20, 2024.

When should I use push-receiver ?

• I want to receive push notifications sent using Firebase Cloud Messaging in a NodeJS application.
• I want to communicate with a node process/server using Firebase Cloud Messaging infrastructure.

When should I not use push-receiver ?

• I want to send push notifications (use the firebase SDK instead)
• My application is running on a FCM supported platform (Android, iOS, Web).

Install

npm i -S push-receiver

Requirements

• Node v8 (async/await support)
• Firebase apiKey, appID, and projectID to receive notification
• Firebase serverKey to send notification (optional) (deprecated and removed as of June 20, 2024)

Usage

const { register, listen } = require("push-receiver");

// Firebase config
const config = {
  firebase: {
    apiKey: "XXxxXxX0x0x-Xxxx0-X0Xxxxx_0xxXx_XX0xXxX",
    appID: "1:000000000000:android:xxx0xxxx0000x000xxx000",
    projectID: "the-app-name",
  },
  vapidKey: "", // optional
};

// First time
// Register to GCM and FCM
const credentials = await register(config); // You should call register only once and then store the credentials somewhere
storeCredentials(credentials); // Store credentials to use it later
const fcmToken = credentials.fcm.token; // Token to use to send notifications
sendTokenToBackendOrWhatever(fcmToken);

// Next times
const credentials = getSavedCredentials(); // get your saved credentials from somewhere (file, db, etc...)
// persistentIds is the list of notification ids received to avoid receiving all already received notifications on start.
const persistentIds = getPersistentIds() || []; // get all previous persistentIds from somewhere (file, db, etc...)
await listen({ ...credentials, persistentIds }, onNotification);

// Called on new notification
function onNotification({ notification, persistentId }) {
  // Update list of persistentId in file/db/...
  updatePersistentIds([...persistentIds, persistentId]);
  // Do someting with the notification
  display(notification);
}

Test notification

To test, you can use the send script provided in this repo, you need to pass your serverKey and the FCM token as arguments :

node scripts/send --serverKey="<FIREBASE_SERVER_KEY>" --token="<FIREBASE_TOKEN>"

Note: The send endpoint is deprecated and removed as of June 20, 2024: https://firebase.google.com/support/faq#fcm-depr-features

Acknowledgements

• push-receiver for the original implementation.
• Aracna FCM for the latest FCM registration endpoints.