SignalR errors are swallowed

[kfrajtak]

Hi, I had some hard time with the SignalR hub. I have a IIS hosted ASP.NET app where it worked fine and client was connecting to server hub and then I have a self hosted OWIN app with the same hub (added as linked file) where it did not work. I also share the script files, etc.

After quite a lot of debugging I discovered that the version of SignalR that is used in Microsoft.AspNet.SignalR.Owin interface is 1.2:

{"Url":"/signalr", "ConnectionToken":"...", "ConnectionId":"...", "ProtocolVersion":"1.2"}

the web Microsoft.AspNet.SignalR.Owin is using SignalR version 1.4.

{"Url":"/web/signalr", "ConnectionToken":"...", "ConnectionId":"...", "ProtocolVersion":"1.4"}

That's not a big issue, I can downgrade the web app. The problem is that the error was swallowed and not written to console until I added following code to my controller:

$hub.promise.fail(function (reason) { 
   console.error(reason); 
});

I tried to push the code "up" to your signar-hub.js, but it was never invoked.

Can you add this to your code and/or tell me how to make it work globally in your code.

Thanks, Karel