Signalr 1.0.1 Cross domain 404 error - asp.net-mvc

Question

I have problem with Signalr cross domain usage. I have three different projects(applications) inside one solutions and use signalr to enable chat functionality among them. I have chat project that is separated for other three apps.
This is code from it:
HUB
[HubName("ChatHub")]
public class ChatHub : Hub
{
public void Send(PorukaViewModel message)
{
..do some code
Clients.All.addMessage(
... // returns feedback to clients
);
}
}
GlobalASAX
protected void Application_Start()
{
RouteTable.Routes.MapHubs(new HubConfiguration() { EnableCrossDomain = true });
}
And this is code from my clients apps,
Controller
string chatUrl = System.Configuration.ConfigurationManager.AppSettings["ChatUrl"] + "/signalr/hubs";
var connection = new HubConnection(chatUrl, useDefaultUrl: false);
IHubProxy myHub = connection.CreateHubProxy("ChatHub");
connection.Start().ContinueWith(task =>
{
if (task.IsFaulted)
{
//... I log error and stop connection
connection.Stop();
}
message = "some message";
myHub.Invoke("Send", message).Wait();
connection.Stop();
});
This all working fine on my localhost, but when I deploy it on IIS I have this error on connection.Start():
System.Net.WebException: The remote server returned an error: (404)
Not Found. at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult
asyncResult) at
Microsoft.AspNet.SignalR.Client.Http.HttpHelper.<>c__DisplayClass2.b__0(IAsyncResult
ar) at
System.Threading.Tasks.TaskFactory1.FromAsyncCoreLogic(IAsyncResult
iar, Func2 endFunction, Action1 endAction, Task1 promise, Boolean
requiresSynchronization)
I browsed all question and answers on stackoverflow but can't find any that would help me.
What am I doing wrong?
*NOTE
With jQuery I modified hubs.js and changed this code:
var signalrUrl = $("#chatUrl").val() + '/signalr';
...
signalR.hub = $.hubConnection(signalrUrl, { useDefaultPath: false });
and use this in my communication Views, this is working fine both on localhost and IIS.
Maybe problem is in this line?
signalR.hub = $.hubConnection(signalrUrl, { useDefaultPath: false });
In original /signalr/hubs it like this:
signalR.hub = $.hubConnection("/signalr", { useDefaultPath: false });
How can I do that from controller?

Answer 1

This code is incorrect:
string chatUrl = System.Configuration.ConfigurationManager.AppSettings["ChatUrl"] + "/signalr/hubs";
/SignalR/Hubs points to a Javascript proxy.
/signalr is the connection end point so the code should be:
string chatUrl = System.Configuration.ConfigurationManager.AppSettings["ChatUrl"];
Since the .NET client automatically appends the default /signalr URL.
More on the documentation here https://github.com/SignalR/SignalR/wiki/SignalR-Client-Hubs#hubconnection-api