'Stop producing data.
The HTTPChannel doesn\'t *actually* implement this, beacuse the
assumption is that it will only be called just before C{loseConnection}
is called. There\'s nothing sensible we can do other than call
C{loseConnection} anyway.'

def stopProducing(self):

    if (self._requestProducer is not None):
        self._requestProducer.stopProducing()
