from twisted.web import server, resource
from twisted.internet import reactor, defer

class Simple(resource.Resource):
    isLeaf = True
    def render_GET(self, request):
        return "<html>Hello, world!</html>"

def call_me():
    d = defer.Deferred()
    print "Get something"
    d.callback("success")
    return d

def run_web(_):
    print "run_web"
    site = server.Site(Simple())
    reactor.listenTCP(8080, site)

d = call_me()
d.addCallback(run_web)
reactor.run()