When using htmlui api, the @OnReceive annotation doesn't work correctly. 

I have created an application using the DukeScript Wizard that connects to the bitbucket REST API. It works correctly in the normal client, but doesn't work when running in the "Client for NetBeans". 

Debugging showed that with KOTransfer in LoadJSON the XMLHttpRequest returns status code "0", and never gets past a request.readyState of "1".

Similar bugs (XMLHttpRequest returns status code "0") on Stackoverflow almost always are problems with CORS. Apparently it doesn't work when WebView is running inside NetBeans. I tried setting a system property for WebView as a workaround as indicated here, but without success:

http://stackoverflow.com/questions/23692746/webview-does-not-really-support-cors-in-javafx-2-2

Workaround: Using Tyrus (ko-ws-tyrus) instead of KOTransfer the application works correctly.

To use it I added a dependency on Tyrus:

        <dependency>
            <groupId>org.netbeans.html</groupId>
            <artifactId>ko-ws-tyrus</artifactId>
            <version>1.2.3</version>
            <type>jar</type>
        </dependency>

In addition to the dependency you need to register Tyrus on a position lower than 100 (otherwise KOTransfer has preference):

import org.netbeans.html.context.spi.Contexts;
import org.netbeans.html.json.spi.Transfer;
import org.openide.util.lookup.ServiceProvider;

@ServiceProvider(service = Contexts.Provider.class)
public class RegisterTransfer  implements Contexts.Provider {

    @Override
    public void fillContext(Contexts.Builder context, Class<?> requestor) {
        context.register(Transfer.class, new KOTransfer(), 10);
    }
}


That is a bit cumbersome, so I would suggest to make it easier to use Tyrus. It should probably be the default when running in NetBeans.