DownloadHandlerFile on iOS 12.3/2018.3 not working

Hi,

I recently upgraded my iPad to iOS 12.3 and now it fails when trying to download files. It used to work fine, so I'm not sure what I can do other than write my own DownloadHandlerFile, which seems a bit redundant?

I've tried using Unity 2018.3.14f1 and the code is the same as the UnityWebRequest DownloadHandlerFile example. I've verified that the folder exists and the file does not.

I get the following error (note that it doesn't matter if it's an image, a binary file, a text file, an asset bundle, the result is the same):

ArgumentException: Failed to create file /var/mobile/Containers/Data/Application/XXX/Documents/cache/image.png at UnityEngine.Networking.DownloadHandlerFile.InternalCreateVFS (System.String path) [0x00000] in <00000000000000000000000000000000>:0
at ContentCache+<DoDownload>d__39.MoveNext () [0x00000] in <00000000000000000000000000000000>:0
at UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) [0x00000] in <00000000000000000000000000000000>:0
at ContentCache.DownloadFile (System.String url, System.String pathToSaveImage) [0x00000] in <00000000000000000000000000000000>:0
at ContentCache.DownloadFileFromKey (System.String localKey, System.Action callback) [0x00000] in <00000000000000000000000000000000>:0
at ContentCache.DownloadFilesKeysVersion (System.Collections.Generic.List`1[T] cKeysList, System.Action callback) [0x00000] in <00000000000000000000000000000000>:0
at ContentCache+<BuildCacheFromFirebaseData>d__17.MoveNext () [0x00000] in <00000000000000000000000000000000>:0
at UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) [0x00000] in <00000000000000000000000000000000>:0
at UnityMainThreadDispatcher.Update () [0x00000] in <00000000000000000000000000000000>:0
ContentCacheownloadFile(String, String)

 

Just tried compiling with 2019.1.6f1 and got the same result. Is there some permission I need to set?

 

Yes, the full path is: /var/mobile/Containers/Data/Application/XXX/Documents/cache/image.png (XXX is the application name)

 

Hi,

The code I'm calling is:

Code (CSharp):

1. public IPromise DownloadFile (string url, string pathToSaveImage)
2.     {
3.         _filesToDownload++;
4.         if (_filesToDownload > 0) AppFlowManager.Instance.ShowLoadingSpinner (L10nId.Misc_Loading);
5.         Promise promise = new Promise ();
6.         StartCoroutine (_DownloadFile (url, pathToSaveImage, promise));
7.  
8.         return promise;
9.     }
10.  
11.     private IEnumerator _DownloadFile (string url, string savePath, Promise promise)
12.     {
13.         if (!Directory.Exists (Path.GetDirectoryName (savePath)))
14.         {
15.             Directory.CreateDirectory (Path.GetDirectoryName (savePath));
16.         }
17.  
18.         Dedbugs.Log ($"Make web request for {url}", Dedbugs.Caching);
19.  
20.         UnityWebRequest request = UnityWebRequest.Get (url);
21.         request.downloadHandler = new DownloadHandlerFile (savePath);
22.         request.SendWebRequest ();
23.  
24.         while (!request.isDone)
25.         {
26.             yield return null;
27.         }
28.  
29.         //Check if we managed to send
30.         if (string.IsNullOrEmpty (request.error))
31.         {
32.             Dedbugs.Log ($"Download file Success from {url} to {savePath}", Dedbugs.Caching);
33.             _filesToDownload--;
34.             promise.Resolve ();
35.         }
36.         else
37.         {
38.             Dedbugs.Log ($"Download file Error: {request.error}", Dedbugs.CachingErrors);
39.             _filesToDownload--;
40.             promise.Reject (new ApplicationException (request.error));
41.         }
42.     }
43.  

The error occurs on the line: request.downloadHandler = new DownloadHandlerFile (savePath);

 

Bump
@Aurimas-Cernius any help here. I am also getting this issue. I am on Unity 2018.4.23f1

 

Yes.

 

@Aurimas-Cernius @jokigenki Same issue here on Unity 2018.3. Is it resolved?

 

It's been a while since I worked on this bit of code, but checking back on it, it hasn't changed, so I don't think it was an issue with the C# code, although this was 2 years ago, so I can't really remember. Sorry I can't be of more help

 

I have the same issue. Did anyone find a solution? I get this error randomly and i cant even the " yield return loader.SendWebRequest();" into a try catch....

 

Hello everybody! I have encountered the same problem, but it is not a fact that the cause of your occurrence is the same.
I tried to download and burn the same file twice, and that's why I got this error.