'Read raw data, until the quantity specified by a previous \'len\' line is
reached.'

def rawDataReceived(self, data):

    (data, rest) = (data[:self.length], data[self.length:])
    self.length = (self.length - len(data))
    self.received[(-1)] = (self.received[(-1)] + data)
    if (self.length == 0):
        self.setLineMode(rest)
