AngularJS Learned Lessons #1: - Getting a Invalid Session State on response and trait it.

gistfile1.js

//Intercepting a Invalid Session status using an Interceptor:
//Following the sample described in http://docs.angularjs.org/api/ng.$http (see "Response inteceptors" paragraph)
//At error function handler:
function (response) {
        //if the user's session is invalid, then the status code is zero.
    if (response.status == 0) {
    	//Session Invalid! So, you can do anything... typically, you can dispatch a custom event to be handled by some controller 
        //and manipulate your models ou routing state.
        $rootScope.$emit('redirect_event');
		return;
    }
    return $q.reject(response);
}