Refresh the contents of an RSS feed

How do I update the contents of an RSS feed with Ionic refresher? I'm using the Google Feed API (https://developers.google.com/feed/v1/reference). The RSS feed works but the content is not updated and the method doRefresh() does not work properly:

myApp.controller('rssController',  function($ionicPlatform, $http, $scope, $cordovaNetwork, $ionicLoading, $location, $rootScope, $ionicPopup, $timeout, $cordovaToast) {
            var options = {
              location: 'yes',
              clearcache: 'yes',
              toolbar: 'yes',
              closebuttoncaption: 'DONE?'
            };

            $ionicLoading.show({
                template: 'loading ...'
            }); 

    $scope.init = function() {      

        var handelsBlatt = "http://www.handelsblatt.com/rss/hb.xml";
        var schwarzwaelderBote = "http://www.schwarzwaelder-bote.de/moenchweiler.rss.feed";
        var suedkurier = "http://feeds.feedburner.com/suedkurier-aktuell";

        //Using Google API to fetch all of a Feed's items
        //v The version of the API.  Currently we are on version 1.0
        //q The query to be used in the API.  The URL with the RSS feed represents our query
        //num   The number of entries to return. Default is 4 and maximum is 100

      var feed =  $http.get("http://ajax.googleapis.com/ajax/services/feed/load", { params: { "v": "1.0", "q": handelsBlatt, "num":20 } })
            .success(function(data) { 
                $ionicLoading.hide();
                $scope.rssTitle = data.responseData.feed.title;
                $scope.rssUrl = data.responseData.feed.feedUrl;
                $scope.rssSiteUrl = data.responseData.feed.link;
                $scope.entries = data.responseData.feed.entries;
                window.localStorage["entries"] = JSON.stringify(data.responseData.feed.entries);
            })
            .error(function(data) {
                console.log("ERROR: " + data);
                $ionicLoading.hide();
                var alertPopup = $ionicPopup.alert({
                    title: 'no connection!',
                    template: 'Please check your Internet connection!'
                });
                if(window.localStorage["entries"] !== undefined) {
                    $scope.entries = JSON.parse(window.localStorage["entries"]);
                }
            });

    }

    //open the rss entry in web browser
    $scope.browse = function(v) {
        window.open(v, "_blank", options);
    }

    //update the content of RSS-List
     $scope.doRefresh = function() {
         console.log('Refreshing!');
         $http.get("http://ajax.googleapis.com/ajax/services/feed/load", { params: { "v": "1.0", "q": handelsBlatt, "num":20 } })
             .success(function(newItems) {
               $scope.items = newItems;
             })
             .finally(function() {
               // Stop the ion-refresher from spinning
               $scope.$broadcast('scroll.refreshComplete');
               $cordovaToast.showLongBottom('This could be your text!')
             });
     }
});

HTML:

<ion-content ng-controller="rssController" ng-init="init()">
    <ion-refresher
    pulling-text="The content is updated..."
    on-refresh="doRefresh()">
  </ion-refresher>
    <div class="list">
        <div ng-repeat="entry in entries" class="item" ng-click="browse(entry.link)">
            <b>{{entry.title}}</b><br> 
            <span>{{entry.publishedDate}}</span><br>            
            <span ng-bind-html="entry.contentSnippet"></span>       
        </div>

    </div>
</ion-content>