Function _decode_uu

Lib/email/message.py:110–138

Decode uuencoded data.

(encoded)

def _decode_uu(encoded):
    """Decode uuencoded data."""
    decoded_lines = []
    encoded_lines_iter = iter(encoded.splitlines())
    for line in encoded_lines_iter:
        if line.startswith(b"begin "):
            mode, _, path = line.removeprefix(b"begin ").partition(b" ")
            try:
                int(mode, base=8)
            except ValueError:
                continue
            else:
                break
    else:
        raise ValueError("`begin` line not found")
    for line in encoded_lines_iter:
        if not line:
            raise ValueError("Truncated input")
        elif line.strip(b' \t\r\n\f') == b'end':
            break
        try:
            decoded_line = binascii.a2b_uu(line)
        except binascii.Error:
            # Workaround for broken uuencoders by /Fredrik Lundh
            nbytes = (((line[0]-32) & 63) * 4 + 5) // 3
            decoded_line = binascii.a2b_uu(line[:nbytes])
        decoded_lines.append(decoded_line)

    return b''.join(decoded_lines)


class Message: