A simple angular interceptor

AuthInterceptor.js

(function () {
  'use strict';

  angular.module('smartticket.services')

    .factory('BearerAuthInterceptor', function ($window, $q, $localStorage, $location) {
      return {
        request: function (config) {
          config.headers = config.headers || {};

          var token = $localStorage.get('token');

          if (token) {
            config.headers.Authorization = 'Bearer ' + token;
          }
          return config || $q.when(config);
        },
        response: function (response) {
          if (response.status === 401) {
            $location.path('login');
          }
          return response || $q.when(response);
        }
      };
    });

})();