Authenticate to Azure Mobile BaaS with Titanium Mobile's native Facebook module (Alloy framework)

alloy.js

// The contents of this file will be executed before any of
// your view controllers are ever executed, including the index.
// You have access to all functionality on the `Alloy` namespace.
//
// This is a great place to do any initialization for your app
// or create any global variables/functions that you'd like to
// make available throughout your app. You can easily make things
// accessible globally by attaching them to the `Alloy.Globals`
// object. For example:
//
// Alloy.Globals.someGlobalFunction = function(){};

// Loads the Facebook module, which can be referenced by Alloy.Globals.Facebook
Alloy.Globals.Facebook = require('facebook');

index.js

// Use the Alloy.Globals.Facebook namespace to make Facebook module API calls
var facebook = Alloy.Globals.Facebook;

// substitute your own Azure mobile service URL
var appURL = "https://tiazure.azure-mobile.net/";


// set your Facebook app ID in tiapp.xml
//  <property name="ti.facebook.appid">FACEBOOK_APP_ID</property>

// declare Facebook modules in tiapp.xml
// <modules>
//     <!-- Add the appropriate line(s) to your modules section -->
//     <module platform="android">facebook</module>
//     <module platform="iphone">facebook</module>
// </modules>

// retrieve Facebook app ID as set in tiapp.xml
facebook.appid = Ti.App.Properties.getString('ti.facebook.appid');

// set Facebook permissions
facebook.permissions = ['publish_actions'];

// set FB login listener

facebook.addEventListener('login', function(e) {

	if (e.success) {
		console.info(JSON.stringify(e));
		
		// FB returns accessToken
		console.info("token: "+facebook.accessToken);
		
		// pass FB accessToken to Azure authentication method
		authAzure({"token":facebook.accessToken});
	}
	
	else if (e.error) {
		console.info(JSON.stringify(e));
		alert(e.error);
	}
	
	else if (e.cancelled) {
		console.info(JSON.stringify(e));
		alert("Canceled");
	}
	
});

// method to retrieve Azure 

function authAzure(_opts) {
	 var endpoint = appURL + "login/facebook";
	 var client = Ti.Network.createHTTPClient({
	     // function called when the response data is available
	     onload : function(e) {
	     	// celebration! We've successfully authenticated to Azure
	     	// parse Azure authentication token
	         var authToken = JSON.parse(this.responseText).authenticationToken;
	         // display Azure authentication token to console
	         console.info("Azure auth token: " + authToken);
	         alert('success');
	     },
	     // function called when an error occurs, including a timeout
	     onerror : function(e) {
	         Ti.API.debug('error: ' + e.error);
	         alert('error');
	     },
	     timeout : 5000  // in milliseconds
	 });
	 // Prepare the connection.

	 client.open("POST", endpoint);

	 // Send the request.
	 client.send({"access_token":_opts.token});

};

// set Facebook button style
$.fbButton.style = facebook.BUTTON_STYLE_WIDE;

// open window
$.index.open();

index.xml

<Alloy>
	<Window class="container">
		<LoginButton id="fbButton" ns="Alloy.Globals.Facebook"/>
	</Window>
</Alloy>