ServerEventsClient.cs Start Method using Send throws PlattformNotSupported Exception (on Mobile Platform)

[oezyurt]

Describe the issue

in our Android/iOS Core Net6 Project the method ServerEventsClient.Connect() throw an exception "PlattformNotSupported"

client = new ServerEventsClient(this.BaseUri);
await client.Connect();

   at System.Net.Http.HttpClientHandler.Send(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.HttpMessageInvoker.Send(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.HttpClient.Send(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationToken cancellationToken)

Reproduction

This ServiceStack code throw the exeception in class ServerEventsClient

We implemented a Workaround that's work, but... (Invoke Custom HttpClientHandler that override the Send Method)

client = new ServerEventsClient(this.BaseUri)
      {
          HttpClientHandlerFactory = (x) => { return this.HttpClientHandlerFactory?.Invoke(); },
      }
....
    internal class ServiceStackHttpClientHandler : HttpClientHandler
    {
        public ServiceStackHttpClientHandler()
        {
        }

        protected override HttpResponseMessage Send(HttpRequestMessage request, CancellationToken cancellationToken)
        {
            var task = this.SendAsync(request, cancellationToken);
            return task.GetAwaiter().GetResult();
        }
    }

in Android this workaround fire Warnings ...

Core6 throwing the Exception here:

https://github.com/dotnet/runtime/blob/main/src/libraries/System.Net.Http/src/System/Net/Http/HttpClientHandler.AnyMobile.cs

Expected behavior

Please Fix the issue for Mobile Core Net6

System Info

Visual Studio 22
ServiceStack v6.5

Additional context

No response

Validations

• [X] Confirm Issue is reproducible from the information provided
• [X] Have an active commercial ServiceStack License (GitHub Username is registered on Support page)

[mythz]

I've added an async StartAsync() overload in this commit which is now available in the latest v6.5.1+ on MyGet.

Can you try to see if using the new non-blocking StartAsync() method resolves this issue.

[oezyurt]

Thx, I think the ReStart Method includes the same issue ... the OnExceptionReceived Event includes the Restart()

[mythz]

I've updated .NET 6+ clients to call StartAsync() on Restart in this commit, this change is now available on MyGet, you'll need to clear your NuGet packages cache to download the latest version.

[oezyurt]

Thx, i can confirm your commit fix the issue for me