Authetication exception without internet

[arangaramu]

My box appl is crashing without internet.
Here is my simple code
var boxConfig = new BoxConfigBuilder(box_Client_Id, box_Client_Secret)
.SetEnterpriseId(box_Enterprise_ID).Build();
var boxCCG = new BoxCCGAuth(boxConfig);
userToken = await boxCCG.UserTokenAsync(box_User_Id);

The UserTokenAsync crashes the application without internet. I tried try and catch logic to avaid crashing the app but no luck

I get this error message. Any idea how else to fix this issue

Unhandled Exception: System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: The remote name could not be resolved: 'api.box.com'
at System.Net.HttpWebRequest.EndGetRequestStream(IAsyncResult asyncResult, TransportContext& context)
at System.Net.Http.HttpClientHandler.GetRequestStreamCallback(IAsyncResult ar)
--- End of inner exception stack trace ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Box.V2.Request.HttpRequestHandler.d__8.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Box.V2.Request.HttpRequestHandler.d__61.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Box.V2.Services.BoxService.<ToResponseAsync>d__51.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Box.V2.CCGAuth.BoxCCGAuth.d__8.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Box.V2.CCGAuth.BoxCCGAuth.d__7.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

[Mateusz Woda]

Hi @arangaramu
The UserTokenAsync (like most SDK methods) makes an HTTP request to api.box.com so without the Internet, this call is expected to fail. I am not sure what you are trying to achieve, and what is the behavior you expect without the internet connection?

[arangaramu]

I want to handle the exception. I dont want to crash my application. Is there anyway I can detect the network failure or unable to establish the connection with server for any reason

[Mateusz Woda]

The simpliest solution to not crash whole app would be to wrap call for token in try/catch clause like this

try
{
    var userToken = await boxCCG.UserTokenAsync(box_User_Id);
}
catch (Exception ex)
{
    Console.WriteLine(ex);
}

You can alternatively ping some other service (like api.box.com for example) to check if you have internet connection before using boxClient.

[arangaramu]

Thank you. In the earlier code I had catch (BoxException ex) and it didnt catch the exception. I dont know the difference between two. But now issue is resolved and its working fine. Thank you agian