Allow internal hubs

[rynowak]

For server-side Blazor we register a hub to handle communication with the client, but we want to treat this hub like an implementation detail.

It would be really nice if the type could make the hub internal. We don't want to expose the following API surface publicly, but SignalR requires it.

This is our contract with our client-side code and we will want to evolve it.

public sealed class ComponentHub : Hub
    {
        //
        // Summary:
        //     /// Gets the default endpoint path for incoming connections. ///
        public static PathString DefaultPath
        {
            [CompilerGenerated]
            get
            {
                throw null;
            }
        }

        //
        // Summary:
        //     /// Intended for framework use only. Applications should not instantiate ///
        //     this class directly. ///
        public ComponentHub(IServiceProvider services, ILogger<ComponentHub> logger)
        {
        }

        //
        // Summary:
        //     /// Intended for framework use only. Applications should not call this method
        //     directly. ///
        public void BeginInvokeDotNetFromJS(string callId, string assemblyName, string methodIdentifier, long dotNetObjectId, string argsJson)
        {
        }

        //
        // Summary:
        //     /// Intended for framework use only. Applications should not call this method
        //     directly. ///
        [DebuggerStepThrough]
        public Task<bool> ConnectCircuit(string circuitId)
        {
            throw null;
        }

        //
        // Summary:
        //     /// Intended for framework use only. Applications should not call this method
        //     directly. ///
        public override Task OnDisconnectedAsync(Exception exception)
        {
            throw null;
        }

        //
        // Summary:
        //     /// Intended for framework use only. Applications should not call this method
        //     directly. ///
        public void OnRenderCompleted(long renderId, string errorMessageOrNull)
        {
        }

        //
        // Summary:
        //     /// Intended for framework use only. Applications should not call this method
        //     directly. ///
        public string StartCircuit(string uriAbsolute, string baseUriAbsolute)
        {
            throw null;
        }
    }

[analogrelay]

👍 Sounds good to me. Should be a quick and easy change too.

[BrennanConroy]

It would be really nice if the type could make the hub internal.

@rynowak Did you try this out? I gave this a quick try in a test app and making the hub internal looked like it worked.

[rynowak]

hmmm headscratch. I'll try it and make sure

[BrennanConroy]

@rynowak Looks like you figured it out? #9998

[rynowak]

Ya, let's close this BAD BOY