Cross Domain Hub

#Cross-Domain Hub Example

Part of an owin startup class for a website which hosts a hub that is accessible cross-domain.

public class Startup
    {
        public void Configuration(IAppBuilder app)
        {            
            // Branch the pipeline here for requests that start with "/signalr"
            app.Map("/signalr", map =>
            {
                // Setup the CORS middleware to run before SignalR.
                // By default this will allow all origins. You can 
                // configure the set of origins and/or http verbs by
                // providing a cors options with a different policy.
                map.UseCors(CorsOptions.AllowAll);
                var hubConfiguration = new HubConfiguration
                {
                    EnableDetailedErrors = true,
                    EnableJSONP = true,
                    EnableJavaScriptProxies = true
                };
                // Run the SignalR pipeline. We're not using MapSignalR
                // since this branch already runs under the "/signalr"
                // path.
                map.RunSignalR(hubConfiguration);
            });
        }
    }

Note that in the sample I use map.UseCors(CorsOptions.AllowAll); which is probably not what you want in a production environment, but is useful for testing.