SNS: Fetching the Token for confirmSubscription()

[pree011235]

Trying to do a seemingly simple confirm subscription but I keep hitting the Invalid Token 400 issue:

endPointTest()
  .then((result) => {
    console.log("Result", result);

    AWS.config.update({
      accessKeyId:'accessKeyIdvalue',
      secretAccessKey:'secretAccessKeyvalue',
      region: 'us-west-2'
    });
    var sns = new AWS.SNS();
    console.log("SNS OBj", sns); 
    var params2 = {
      Protocol: 'http', /* required */
      TopicArn: 'topic_ARN_from_console', /* required */
      Endpoint: 'http://website.com/'
    };
    sns.subscribe(params2, function(err, data) {
      if (err) console.log(err, err.code); // an error occurred, where it breaks
      else     {
        console.log("Subscribing...", data.ResponseMetadata.RequestId);//Prints this
        console.log("Subscribing... with data", data); //Prints this fine
        var params1 = {
          Token: data.ResponseMetadata.RequestId, /* Where can I get this from?? */
          TopicArn: 'topic_ARN_from_console' /* required */
          //AuthenticateOnUnsubscribe: 'false'
        };
        sns.confirmSubscription(params1, function(err, data) {
          if (err) console.log(err, err.stack); // an error occurred
          else    {
            console.log("Confirmed Sub", data);
          }          // successful response
        });
      }
    });
  }).catch(console.error.bind(console));

Where can I get the endpoint Token from, right after the subscribe (Tried to look up my this but that didn't have it either? Thanks!

[jeskew]

Hi @pree011235,

The token will be provided in a message sent to the endpoint you're subscribing to an SNS channel. The endpoint will receive a POST message with a JSON payload containing, among other fields, a Token parameter and a SubscribeURL parameter. To confirm a subscription, you can perform a GET request on the value provided for SubscribeURL or use the provided Token to call sns.confirmSubscription.

[AdityaManohar]

@pree011235 I'm marking this as closed as it is not an SDK issue. As @jeskew mentioned, the token parameter is supplied in a confirmation message supplied to the endpoint that has been subscribed to receive SNS notifications.

Feel free to reopen this issue or open another issue if you have other questions.

[aadamsx]

I'm trying to do this same thing, using the sms protocol. I too was placing the confirmSubscription in the subscribe callback. @pree011235 in my case, when I call the subscribe, my test phone gets the SMS message and I have to reply YES in order to confirm the subscribe. From a coding standpoint, How do I confirm that phone subscribed?

[jeskew]

@aadamsx You can call listSubscriptions and check to see if your test phone has been successfully subscribed.

[aadamsx]

Thank you @jeskew

I'm going to use listSubscriptionsByTopic. But it only returns 100 subscriptions, requiring a NextToken in order to get more.

Do you have any sudo-code that would help?

This is what I came up with:

      AWS.config.update({
         accessKeyId: Meteor.settings.awsAccessKeyId,
         secretAccessKey: Meteor.settings.awsSecretKey,
         region: "us-east-1"
      });

      var sns = new AWS.SNS({params: {TopicArn: 'arn:aws:sns:us-east-1:34523452345:test'}});
      var nextToken = null;
      var index = 0;
      var results[];
      do {
        result = sns.ListSubscriptionsByTopic({NextToken: nextToken}, function (err, data) {
          if (err) console.log(err, err.stack); // an error occurred
          else {
            // call ListSubscriptionsByTopic again?  How?
            results[index] = data.Subscriptions;
            if (NextToken) {
              nextToken = NextToken;
              index = index + 1;
            } else {
              nextToken = null;
            }
          }
        });  
      }
      while (nextToken !== null);

    // do something with the results

[jeskew]

Hi @aadamsx,

The callback passed to sns.ListSubscriptionsByTopic will be called by the operation's response, which has a hasNextPage method and a nextPage method. The latter takes a callback and handles pagination for you. You won't need to keep track of the nextToken.

var sns = new AWS.SNS({region: 'us-west-2'})
var paginate = function (err, data) {
        if (err) {
            console.log(err);
        } else {
            // current page of data is available as 'data'
            if (this.hasNextPage()) {
                this.nextPage(paginate);
            }
        }
    };

sns.listSubscriptions(paginate);

[aadamsx]

Thank you, this is exactly the feedback I was looking for!

I got things working, but without the nextToken. I was confused what to do about it, and you just clear it up for me!

[desaiazaz-zz]

var nextToken = null;
var index = 0;
var results=[];
do {
results = sns.ListSubscriptionsByTopic({NextToken: nextToken}, function (err, data) {
if (err) console.log(err, err.stack); // an error occurred
else {
// call ListSubscriptionsByTopic again? How?
results[index] = data.Subscriptions;
if (NextToken) {
nextToken = NextToken;
index = index + 1;
} else {
nextToken = null;
}
}
});
}
while (nextToken !== null);
console.log("LIST>>>",results);

got the error ListSubscriptionsByTopic function not found

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs and link to relevant comments in this thread.