'Process an HTTP response.
The size of the response is added to the bandwidth throttle and the request
throttle is incremented by one.
Args:
unused_req: The urllib2 request for this response.
res: A urllib2 response object.
Returns:
The response passed in.'

def http_response(self, unused_req, res):

    self.AddResponse(BANDWIDTH_DOWN, res)
    self.throttle.AddTransfer(REQUESTS, 1)
    return res
