node-xmpp-test.js

var xmpp = require('node-xmpp');

//Set node-xmpp options.
//Replace with your projectID in the jid and your API key in the password
//The key settings for CCS are the last two to force SSL and Plain SASL auth.
var options = {
  type: 'client',
  jid: '[email protected]',
  // jid: '[email protected]',
  password: 'xxxx',

  // The CCS XMPP endpoint runs at gcm.googleapis.com:5235.
  // When testing functionality (with non-production users), you should instead connect to gcm-preprod.googleapis.com:5236 (note the different port)
  port: 5235,
  host: 'gcm.googleapis.com',

  // Note that a connection receives upstream messages destined for its GCM sender ID, regardless of which environment (gcm or gcm-preprod) it is connected to. Therefore, test code connecting to gcm-preprod.googleapis.com:5236 should use a different GCM sender ID to avoid upstream messages from production traffic being sent over test connections.
  // port: 5236,
  // host: 'gcm-preprod.googleapis.com',

  legacySSL: true,
  // preferredSaslMechanism: 'PLAIN'
  preferred: 'PLAIN'

  // reconnect: true
};

console.log('creating xmpp app');

var client = new xmpp.Client(options);

client.connection.socket.setTimeout(0);
client.connection.socket.setKeepAlive(true, 10000);

// None of these callbacks are called
client.on('online', function() {
  console.log('online');
});

client.on('connection', function() {
  console.log('connection');
});

client.on('authenticate', function(opts, cb) {
  console.log('authenticate');
});

client.on('close', function() {
  console.log("close");
});

client.on('stanza', function(stanza) {
  if (stanza.is('message') &&
      // Best to ignore an error
      stanza.attrs.type !== 'error') {

    console.log("Message received");

    //Message format as per here: https://developer.android.com/google/gcm/ccs.html#upstream
    var messageData = JSON.parse(stanza.getChildText("gcm"));

    if (messageData && messageData.message_type != "ack" && messageData.message_type != "nack") {

      var ackMsg = new xmpp.Element('message').c('gcm', { xmlns: 'google:mobile:data' }).t(JSON.stringify({
        "to":messageData.from,
        "message_id": messageData.message_id,
        "message_type":"ack"
      }));

      //send back the ack.
      client.send(ackMsg);
      console.log("Sent ack");

      //Now do something useful here with the message
      //e.g. awesomefunction(messageData);
      //but let's just log it.
      console.log(messageData);

    } else {
      //Need to do something more here for a nack.
      console.log("message was an ack or nack...discarding");
    }

  } else {
    console.log("error");
    console.log(stanza)
  }
});

client.on('error', function(e) {
  console.log("error");
  console.error(e);
});