protocol.py 文件源码

def writeConfiguredCookieFile(self, cookie_string = None):
        '''
        Write a random 32-byte value to the configured cookie file.
        If cookie_string is not None, use that value.
        Return the value written to the file, or None if there is no cookie
        file, or if writing the file fails.
        '''
        cookie_file = self.getConfiguredCookieFile()
        if cookie_file is not None:
            if cookie_string is None:
                cookie_string = urandom(TorControlProtocol.SAFECOOKIE_LENGTH)
            try:
                with open(cookie_file, 'w') as f:
                    f.write(cookie_string)
            except IOError as e:
                logging.warning("Disabling SAFECOOKIE authentication, writing cookie file '{}' failed with error: {}"
                                .format(cookie_file, e))
                return None
            # sanity check: this will fail in write-only environments
            assert cookie_string == TorControlProtocol.readCookieFile(
                cookie_file)
            return cookie_string
        else:
            return None