Issue with notification hub - node.js

Question

I am new to azure notification hub. I tried from the documentation. But not able to do the name . Need some help on this .
Tried from the below link
How to register devices to Azure Notification Hub from server side(with NodeJS sdk) ?
Not sure about the params.
var azure = require('azure-sb');
var notificationHubService = azure.createNotificationHubService('<Hub Name>','<Connection String>');
var payload={
alert: 'Hello!'
};
notificationHubService.createRegistrationId(function(error, registrationId, response){
if(!error){
console.log(response);
console.log(registrationId);
//RegistrationDescription registration = null;
//registration.RegistrationId = registrationId;
//registration.DeviceToken = req.body.token;
notificationHubService.apns.createOrUpdateNativeRegistration(registrationId, req.body.token, req.token.upn, function(error, response){
if(!error){
console.log('Inside : createOrUpdateNativeRegistration' + response);
notificationHubService.apns.send(null, payload, function(error){
if(!error){
// notification sent
console.log('Success: Inside the notification send call to Hub.');
}
});
}
else{
console.log('Error in registering the device with Hub' + error);
}
});
}
else{
console.log('Error in generating the registration Id' + error);
}
});
While creating registrationID which registration id i have to pass there. What is request.body.token and what is request.token.upn. I need it for apns

Answer 1

While creating registrationId , you dont have to pass any id. **createRegistrationId(callback)** takes callback as a parameter which creates a registration identifier.
As per the overall implemetation:
/**
* Creates a registration identifier.
*
* #param {Function(error, response)} callback `error` will contain information
* if an error occurs; otherwise, `response`
* will contain information related to this operation.
*/
NotificationHubService.prototype.createRegistrationId = function (callback) {
validateCallback(callback);
var webResource = WebResource.post(this.hubName + '/registrationids');
webResource.headers = {
'content-length': null,
'content-type': null
};
this._executeRequest(webResource, null, null, null, function (err, rsp) {
var registrationId = null;
if (!err) {
var parsedLocationParts = url.parse(rsp.headers.location).pathname.split('/');
registrationId = parsedLocationParts[parsedLocationParts.length - 1];
}
callback(err, registrationId, rsp);
});
};
Once you are done with RegistrationID Creation then you can call createOrUpdateRegistration(registration, optionsopt, callback) and here is the overall implementation for the same:
/**
* Creates or updates a registration.
*
* #param {string} registration The registration to update.
* #param {object} [options] The request options or callback function. Additional properties will be passed as headers.
* #param {object} [options.etag] The etag.
* #param {Function(error, response)} callback `error` will contain information
* if an error occurs; otherwise, `response`
* will contain information related to this operation.
*/
NotificationHubService.prototype.createOrUpdateRegistration = function (registration, optionsOrCallback, callback) {
var options;
azureutil.normalizeArgs(optionsOrCallback, callback, function (o, c) { options = o; callback = c; });
validateCallback(callback);
if (!registration || !registration.RegistrationId) {
throw new Error('Invalid registration');
}
var webResource = WebResource.put(this.hubName + '/registrations/' + registration.RegistrationId);
registration = _.clone(registration);
var registrationType = registration[Constants.ATOM_METADATA_MARKER]['ContentRootElement'];
delete registration[Constants.ATOM_METADATA_MARKER];
delete registration.ExpirationTime;
delete registration.ETag;
if (!registration.Expiry) {
delete registration.Expiry;
}
registration.BodyTemplate = '<![CDATA[' + registration.BodyTemplate + ']]>';
var registrationXml = registrationResult.serialize(registrationType, registration);
this._executeRequest(webResource, registrationXml, registrationResult, null, callback);
};
You can find the complete implementation of NotificationHubService.js here.
Hope it helps.