Myujth

I got an simple login on my page. After logging in I'm displaying data from a server, that is just shown after refreshing the page once.
Before I am getting an Error 500:

GET http://localhost:8080/getDesktop 500
angular.js:14800 Possibly unhandled rejection: ...

My AngularJS code is the following:

var app = angular.module("myApp", );

app.controller("myCtrl", function($scope, $http, $window, $timeout)

//Username
$scope.user = "";

//Desktop
$scope.storage = ;

//Get username

$http.get("/loggeduser", transformResponse: function(response)
 return JSON.stringify(response);
 
).then(function(response) 
 $scope.user = response.data.substring(1, response.data.length-1);
);

//Show Desktop

 $http.get("/getDesktop").then(function(response)
 for(var i = 0; i<response.data.length; i++)
 $scope.storage[i] = name: response.data[i];
 
 return;
 );
);

Backend:

//Returns Desktop
@GetMapping("/getDesktop")
public ArrayList<String> getDesktop() throws Exception 
 ArrayList<String> itemNames = new ArrayList<>();

 if(kdxF.getUser() != null) 
 itemNames = kdxF.showDesktop(); 
 // Just a function to return the Elements in an ArrayList if Strings
 // If user is logged in
 else 
 throw new Exception("Not logged in!");
 

 return itemNames;

And I get the message "Not logged in"

Okay, I solved it with a kinda ugly solution, but it works.
I'm constantly checking if the user is null, then loading the data.

//Returns Desktop
@GetMapping("/getDesktop")
public ArrayList<String> getDesktop() throws Exception 
 ArrayList<String> itemNames = new ArrayList<>();
 int kill = 0; 

 while(kdxF.getUser() == null) // FIXME
 if(kill == 500) 
 break;
 else 
 Thread.sleep(5);
 kill++;
 
 

 itemNames = kdxF.showDesktop();

 return itemNames;

If you get a better suggestion please tell me. :)