UnityWebRequest never finishing on iOS device

Hello everyone,

I'm running into a problem when using UnityWebRequest to try and check my network connection on iOS devices.

Code (csharp):

1. public static IEnumerator HasNetworkConnection(Action onSuccess, Action onError = null) {
2.     var url = https:// + [ API url ] + /
3.     var request = UnityWebRequest.Get(url);
4.  
5.     yield return request.SendWebRequest();
6.     Debug.Log (request.downloadHandler.text);
7.     if (request.isNetworkError || request.isHttpError) {
8.         Debug.Log ("Error " + request.error);
9.         if (onError != null)
10.            onError.Invoke();
11.         // Show dialog
12.     }
13.     else
14.         onSuccess.Invoke ();
15. }

This code works on Windows, MacOS and Android devices and correctly shows a dialog if there is no connection and fires the onSuccess callback when there is a connection.

When I log request.downloadProgress on iOS it constantly prints 0 and goes on forever without ending. So it won't get past

Code (csharp):

1.  yield return request.SendWebRequest();

Is this a common problem on iOS? Is there another solution that works for all devices?

Thanks in advance.

 

I found out that this problem has to do with the activated services on my iPhone.
There is a SIM card inserted but I can't use mobile network with it. When 'Mobile Data' is enabled though, and WIFI is disabled,

Code (csharp):

1. Debug.Log(Application.internetReachability);

still prints 'ReachableViaCarrierDataNetwork'.

That is probably why my UnityWebRequest will fire and think it has a connection, even though there is no real data stream up or down. I noticed that when it has gone on for around 30 minutes without any progress it does actually stop and return an error: 'NSURLConnection finished with error'.

I don't really want to make my application WIFI only. Is there a way for me to check if the carrier data network is able to upload and download data?

 

Never encountered this before, unitywebrequest works fine on iOS for us. For what its worth, a cleaner way of checking for network is:

Code (CSharp):

1. if (Application.internetReachability != NetworkReachability.NotReachable)
2.             {}

What iOS and Unity version are you using?

 

Interesting! To my knowledge there is no such method, but you could overwrite unityrequests timeout to return before the 30 minutes:

https://docs.unity3d.com/ScriptReference/Networking.UnityWebRequest-timeout.html

 

I've used that way of checking before this one, but that didn't work in my case. That code should be used to check if your are connected to WIFI or mobile data, but not if you can establish a connection.

https://docs.unity3d.com/ScriptReference/Application-internetReachability.html
say this:
'Note: Do not use this property to determine the actual connectivity. E.g. the device can be connected to a hot spot, but not have the actual route to the network. Non-handhelds are considered to always be capable of NetworkReachability.ReachableViaLocalAreaNetwork.'

EDIT:
Forgot including my versions. I'm using Unity 2017.4.6f1 and my iPhone is running iOS 11.4.1

 

I've put timeout on 3 seconds and it works very well! I was afraid that timeout meant it would automatically stop after x seconds, regardless of the download progress. But when it does receive data, it doesn't stop. This is what I needed, thanks a lot!

I do hope that Unity changes the UnityWebRequest to automatically handle this, so I don't need to set a timeout.

 

Hi! I have the same problems

 

I have same problem. I use ARKit.

 

Same here...

 

Can anyone provide link to other thread, thx?

edit:
https://forum.unity.com/threads/uni...k-indefinitely-even-with-timeout-set.1012276/

 

btw, .net web requests seem to work fine.
but I'm not able to rewrite my app requesting functionality to .net so fast.
so it's not for sure