'Resume producing data.
This will be called by the transport when the send buffer has dropped
enough to actually send more data. When this happens we can unpause any
outstanding L{Request} producers we have, and also unpause our
transport.'

def resumeProducing(self):

    self._waitingForTransport = False
    if (self._requestProducer is not None):
        self._requestProducer.resumeProducing()
    if (not self._handlingRequest):
        self._networkProducer.resumeProducing()
