Send push notifications with node-apn and Firebase

push.js

var apn = require("apn");
var Firebase = require("firebase");

var service = new apn.connection({ production: false }); // true for production pipeline

// Create a reference to the push notification queue
var pushRef = new Firebase("<your-firebase>.firebaseio.com/notificationQueue");
// listen for items added to the queue
pushRef.on("child_added", function(snapshot) {

    // This location expects a JSON object of:
    // {
    //     "token": String - A user's device token
    //     "message": String - The message to send to the user
    // }
    var notificationData = snapshot.val();
    sendNotification(notificationData);
    snapshot.ref().remove;

});

function sendNotification(notificationData) {
    var notification = new apn.notification();
    // The default ping sound
    notification.sound = "ping.aiff";
    // Your custom message
    notification.alert = notificationData.message;
    // Send the notification to the specific device token
    service.pushNotification(notification, [notificationData.token]);
    // Clean up the connection
    service.shutdown();
}