I imported the basic example flow given here:
I modified the flow to use the the URL http://rio-26/hello for the HTTP IN node
curl http://rio-26/hello at my laptop here to see the response:
$ curl http://rio-26/hello301 Moved Permanently
301 Moved Permanently
So I am getting a response of sorts. I am guessing the 301 is the redirection to port 443 and thus no real reponse.
What needs to change to succeed with basic GET and response things. I anticipate certificates and firwalls and such.