pop3.py 文件源码

def do_AUTH(self, args=None):
        if not getattr(self.factory, 'challengers', None):
            self.failResponse("AUTH extension unsupported")
            return

        if args is None:
            self.successResponse("Supported authentication methods:")
            for a in self.factory.challengers:
                self.sendLine(a.upper())
            self.sendLine(".")
            return

        auth = self.factory.challengers.get(args.strip().upper())
        if not self.portal or not auth:
            self.failResponse("Unsupported SASL selected")
            return

        self._auth = auth()
        chal = self._auth.getChallenge()

        self.sendLine('+ ' + base64.encodestring(chal).rstrip('\n'))
        self.state = 'AUTH'