app.factory('authInterceptor',['$q','$window','$location', function ($q, $window, $location) {
      return {
        request: function (config) {
          config.headers = config.headers || {};
          if ($window.localStorage.sessionToken) {
            config.headers.Authorization = 'Bearer ' + $window.localStorage.sessionToken;
          }
          return config;
        },
        response: function (response) {
          if (response.status === 401) {

            $location.path('/auth/login');
            console.log('Please login before to access the page');
          }
          return response || $q.when(response);
        }
      };
    }]);

app.config(['$routeProvider','$locationProvider','$httpProvider', function ($routeProvider, $locationProvider, $httpProvider) {

      $routeProvider
        .when('/',{
          templateUrl:'views/home/index.html',
          controller:'Home'
        })
        .when('/auth/login',{
          templateUrl:'views/auth/login.html',
          controller:'AuthLogin'
        })
        .when('/auth/signup',{
          templateUrl:'views/auth/signup.html',
          controller:'AuthSignup'
        })
        .otherwise({
          redirectTo:'/'
        });

      $locationProvider.html5Mode(true);

      $httpProvider.defaults.withCredentials = true;/*XHR Credentials*/
      $httpProvider.interceptors.push('authInterceptor');/*Session interceptor*/

    }]);

console.log(config.headers);