SignalR 1.0.1 Cross-domain request (CORS) with Chrome

Question

I am trying to implement the Cross-domain calls with SignalR 1.0.1 with Chrome (Ver 25.0.1364.172). As I have my UI in one host (localhost:16881) and the 'service' in another host (localhost:16901).

I have everything in place as in the topic How to use cross-domain connections (CORS - Access Control Allow Origin) with SignalR

 add jQuery.support.cors = true; before opening a connection
set up $.connection.hub.url = 'http://localhost:16901/signalr';, pointing to your subdomain

allow cross-domain requests on server side, by adding the following header description:

<add name="Access-Control-Allow-Origin" value="http://localhost:16881" />

inside system.WebServer/httpProtocol/customHeaders section in Web.config file.

I also have the HubConfiguration set up for my route mapping in global.asax for SignalR 1.0.1

            RouteTable.Routes.MapHubs(new HubConfiguration()
            {
                EnableCrossDomain = true
            });

Everything looks fine in IE10 and FF22. However in Chrome, it gives me an erorr when SignalR trying to do the handshake.

XMLHttpRequest cannot load http://localhost:16901/signalr/negotiate?_=1363560032589. Origin http://localhost:16881 is not allowed by Access-Control-Allow-Origin. 

I know I can get it works with Chrome by launching it with --disable-web-security, but it doesn't really fit my requirement. Please help!

Answer 1

Here's what you need to do:

1. Remove jQuery.support.cors = true
2. Remove <add name="Access-Control-Allow-Origin" value="http://localhost:16881" />

Then it should work fine.