Angular $http interceptor to intercept responses (ref: http://www.webdeveasy.com/interceptors-in-angularjs-and-useful-examples/)

angular-module-with-interceptor.js

'use strict';

(function() {
  

  angular.module('mymodule', [
  .....

  ])
    .config([
      '$httpProvider',
       function ($httpProvider) {
        
        $httpProvider.interceptors.push('myInterceptor');
      }
    ])
    .run([
      ...
    ])
    .factory('myInterceptor', ['$q', function($q) {  
        var myInterceptor = {
          response: function(response) {
            
            var deferred = $q.defer();
            window.setTimeout(function() {
                //intentionally delay for 2 seconds before returning

                deferred.resolve(response);
            }, 2000);
            return deferred.promise;
        }
        };
        return myInterceptor;
    }]);
})();