[Question] How to send data for broadcastMessage API?

[alimustofa]

Hi @evanshortiss, I am using broadcastMessage to publish news, but I want to send some data to the mobile device (for example id). Is it possible?

Please help me, thanks

[evanshortiss]

Hi @alimustofa,

You can use broadcastMessage, or alternatively it would be more efficient to call subscribe(endpointArn, topicArn, callback) when you register each user the first time.

Then you just send a single message to the topic and every user will get it. Here's a pseudo code example:

const SNS = require('sns-mobile');

const SNS_KEY_ID = process.env['SNS_KEY_ID'];
const SNS_ACCESS_KEY = process.env['SNS_ACCESS_KEY'];
const ANDROID_ARN = process.env['SNS_ANDROID_ARN'];


const androidApp = new SNS({
  platform: SNS.SUPPORTED_PLATFORMS.ANDROID,
  region: 'eu-west-1',
  apiVersion: '2010-03-31',
  accessKeyId: SNS_KEY_ID,
  secretAccessKey: SNS_ACCESS_KEY,
  platformApplicationArn: ANDROID_ARN,
  //sandbox: true (This is required for targetting (iOS) APNS_SANDBOX only)
});

const BROADCAST_TOPIC = 'SOME_TOPIC_ID_FROM_SNS_DASHBOARD';

exports.registerUser = function (deviceId, callback) {
  // first register the user
  androidApp.addUser(deviceId, {}, function(err, endpointArn) {
    if(err) {
      callback(err);
    } else {
      // now subscribe the user to the broadcast topic (like a channel)
      androidApp.subscribe(endpointArn, BROADCAST_TOPIC, callback);
    }
  });
};

exports.sendBroadcastMessage = function (msg, callback) {
  // every user will get this message
  androidApp.publishToTopic(BROADCAST_TOPIC, msg, callback);
};

You can read about the msg format for topic here. You can include custom data in this message such as id like you asked.

[evanshortiss]

If you have any further problems you can reopen this @alimustofa

[alimustofa]

But is it possible use broadcastMessage? Can I modify msg format to add custom data from broadcastMessage API?

[alimustofa]

Ooops, solved @evanshortiss
Thanks 👍