strongly typed signalR with streaming

[gesho]

is it possible to have streaming with strongly typed hub using IAsyncEnumerable?

for example when I try this sort of IHub, project

• builds
• runs
• crashes on first connection with message

may be I should be wrapping return in Task<>?

    public interface IHub
    {
        Task PostToClientAsync(Message message);

        async IAsyncEnumerable<Message> StreamToClientAsync(IEnumerable<Message> messages)
        {
            foreach (var message in messages)
            {
                await Task.Delay(1000);
                yield return message;
            }
        }

    }

Error: Cannot generate proxy implementation for '***.Hub.IHub.StreamToClientAsync'. All client proxy methods must return 'System.Threading.Tasks.Task' or 'System.Threading.Tasks.Task'.
fail: Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher[8]
Failed to invoke hub method 'PostToHubAsync'.
System.InvalidOperationException: Cannot generate proxy implementation for ***.Hub.IHub.StreamToClientAsync'. All client proxy methods must return 'System.Threading.Tasks.Task' or 'System.Threading.Tasks.Task'.

[gfoidl]

@BrennanConroy please have a look here.

[BrennanConroy]

Looks like a bug. We probably didn't think about strongly-typed hubs when adding streaming support.