data_collector.py 文件源码

def set_fingerprint(self, fingerprint):
        '''
        If fingerprint is valid, set our stored fingerprint to fingerprint, and
        return True.
        Otherwise, return False.
        Called by TorControlClientProtocol.
        '''
        fingerprint = fingerprint.strip()

        # Do some basic validation of the fingerprint
        if not len(fingerprint) == 40:
            logging.warning("Bad fingerprint length %d: %s", len(fingerprint), fingerprint)
            return False
        if not all(c in string.hexdigits for c in fingerprint):
            logging.warning("Bad fingerprint characters: %s", fingerprint)
            return False

        # Is this the first time we've been told a fingerprint?
        if self.fingerprint is None:
            self.fingerprint = fingerprint
            self.generate_noise()
        else:
            if self.fingerprint != fingerprint:
                logging.warning("Received different fingerprint %s, keeping original fingerprint %s",
                                self.fingerprint, fingerprint)
            else:
                logging.debug("Duplicate fingerprint received %s", fingerprint)

        return True