On Tue, 29 Apr 2014 14:42:43 +0200, Sönke Ludwig wrote:

Am 29.04.2014 11:45, schrieb Chris Rays:

This is the example hello world.

(...)

The method hello is called twice, though there is only one response.

Can you try to print the content of req.requestURL, too? I suspect
that the browser is requesting something like "/favicon.ico" or similar.

Yes. That is exactly the case.