euibase.py 文件源码

def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
        text = tok.get_string()
        tok.get_eol()
        if len(text) != cls.text_len:
            raise dns.exception.SyntaxError(
                'Input text must have %s characters' % cls.text_len)
        expected_dash_idxs = range(2, cls.byte_len * 3 - 1, 3)
        for i in expected_dash_idxs:
            if text[i] != '-':
                raise dns.exception.SyntaxError('Dash expected at position %s'
                                                % i)
        text = text.replace('-', '')
        try:
            data = binascii.unhexlify(text.encode())
        except (ValueError, TypeError) as ex:
            raise dns.exception.SyntaxError('Hex decoding error: %s' % str(ex))
        return cls(rdclass, rdtype, data)