Question

Basically I have 3 apps. A web app, Nservicebus, and a signalr self hosting server for my hubs. I am currently using signalr version .4. Basically the web app initiates a connection with the self hosted server on page load. The User does an action which sends a command down the service bus. The service bus then connects to the signalr server to notify all the web clients.

My Web page:

<script src="http://localhost:8081/test/signalr/hubs" type="text/javascript"></script>
<script>
    jQuery.support.cors = true;
    var myHub;  

    $.connection.hub.url = 'http://localhost:8081/test/signalr/hubs';

    $(function () {
        myHub = $.connection.userAccountHub;

        myHub.ChangeNameUpdated = function (connId) {
            alert("recieved signalr message");          
        };

        $.connection.hub.start().done(function() {
            var myClientId = $.connection.hub.id;
            setCookie("srconnectionid", myClientId);
        });
    });

</script>

My SignalR server:

      static void Main(string[] args)
    {
        Debug.Listeners.Add(new ConsoleTraceListener());
        Debug.AutoFlush = true;

        string url = "http://localhost:8081/test/";
        var server = new Server(url);


        server.EnableHubs();
        server.Start();


        Console.WriteLine("Server running on {0}", url);

        while (true)
        strong text{
            ConsoleKeyInfo ki = Console.ReadKey(true);
            if (ki.Key == ConsoleKey.X)
            {
                break;
            }
        }
    }

My Hub inside my Signalr server project

 public class UserAccountHub : Hub
    {

        public void UsersNameChanged(string passedThroughConnectionId)
        {
            Clients.ChangeNameUpdated(passedThroughConnectionId);
        }
    }

My Call from my nservicebus

        //connect to signalRServer
        var connection = new HubConnection("http://localhost:8081/test/signalr/hubs");
        IHubProxy myHub = connection.CreateProxy("SignalRServer.Hubs.UserAccountHub");

        //Credentials are inherited from the application
        connection.Credentials = CredentialCache.DefaultNetworkCredentials;

        var test = message.GetHeader("signalrConnectionId");


        connection.Start().Wait();
        myHub.Invoke("UsersNameChanged", message.GetHeader("signalrConnectionId")).ContinueWith(task =>
        {
            //for debuging purposes
            if (task.IsFaulted)
            {
                Console.WriteLine(
                    "An error occurred during the method call {0}",
                    task.Exception.GetBaseException());
            }
            else
            {
                Console.WriteLine("Successfully called MethodOnServer");
            }
        });

I open up 2 browsers. I initiate the process on the second browser, and only the first one receives notifications. The second browser doesnt.

I don’t see any issues that stand out when I run fiddler either.

Is there a better approach to this implementation, or am I missing something?

Answer 1

OK! David’s comments got me going in the right direction. Also noticed this was updated, didnt notice this before. Scroll to the bottom for the cross domain support

1.) Updated to version .5

2.) Modified my connection information in javascript to

$.connection.hub.url = 'http://localhost:8081/test/signalr';

$.connection.hub.start({ transport: 'longPolling', xdomain: true }).done(function () {
    //alert("staring hub connection:  " + $.connection.hub.id);
    setCookie("srconnectionid", $.connection.hub.id);
});

3.) I had to change the HubConnection

var connection = new HubConnection("http://localhost:8081/test/");

4.) I had to change the IHubProxy

IHubProxy myHub = connection.CreateProxy("UserAccountHub");