'Handle a server response which is expected to be a server greeting.
@type line: L{bytes}
@param line: A received line.'

def handle_WELCOME(self, line):

    (code, data) = line.split('    ', 1)
    if (code != '+OK'):
        self.transport.loseConnection()
    else:
        m = self.welcomeRe.match(line)
        if m:
            self.welcomeCode = m.group(1)
