Switching protocols on Twisted

gistfile1.py

from twisted.web.server import Site
from twisted.web.http import HTTPChannel
from twisted.web.resource import Resource
from twisted.internet import reactor

class MyServer(Resource):
    isLeaf = True

    def render_GET(self, request):
        if request.uri == "/switch":
            request.channel.switchProtocol(None)
            return "SWITCHED\r\n"
        else:
            return "PLAINTEXT\r\n"

class MyHTTPChannel(HTTPChannel):
    switched = False
    def switchProtocol(self, protocol):
        print "switching protocols"
        self.switched = True

    def dataReceived(self, data):
        if self.switched:
            print "ive switched and must use my other protocol"
        else:
            HTTPChannel.dataReceived(self,data)

class MySite(Site):
    protocol = MyHTTPChannel

server = MyServer()

reactor.listenTCP(7335, MySite(server))

reactor.run()