| from .core import encode, decode, alabel, ulabel, IDNAError |
| import codecs |
| import re |
| from typing import Tuple, Optional |
| |
| _unicode_dots_re = re.compile('[\u002e\u3002\uff0e\uff61]') |
| |
| class Codec(codecs.Codec): |
| |
| def encode(self, data: str, errors: str = 'strict') -> Tuple[bytes, int]: |
| if errors != 'strict': |
| raise IDNAError('Unsupported error handling \"{}\"'.format(errors)) |
| |
| if not data: |
| return b"", 0 |
| |
| return encode(data), len(data) |
| |
| def decode(self, data: bytes, errors: str = 'strict') -> Tuple[str, int]: |
| if errors != 'strict': |
| raise IDNAError('Unsupported error handling \"{}\"'.format(errors)) |
| |
| if not data: |
| return '', 0 |
| |
| return decode(data), len(data) |
| |
| class IncrementalEncoder(codecs.BufferedIncrementalEncoder): |
| def _buffer_encode(self, data: str, errors: str, final: bool) -> Tuple[str, int]: # type: ignore |
| if errors != 'strict': |
| raise IDNAError('Unsupported error handling \"{}\"'.format(errors)) |
| |
| if not data: |
| return "", 0 |
| |
| labels = _unicode_dots_re.split(data) |
| trailing_dot = '' |
| if labels: |
| if not labels[-1]: |
| trailing_dot = '.' |
| del labels[-1] |
| elif not final: |
| # Keep potentially unfinished label until the next call |
| del labels[-1] |
| if labels: |
| trailing_dot = '.' |
| |
| result = [] |
| size = 0 |
| for label in labels: |
| result.append(alabel(label)) |
| if size: |
| size += 1 |
| size += len(label) |
| |
| # Join with U+002E |
| result_str = '.'.join(result) + trailing_dot # type: ignore |
| size += len(trailing_dot) |
| return result_str, size |
| |
| class IncrementalDecoder(codecs.BufferedIncrementalDecoder): |
| def _buffer_decode(self, data: str, errors: str, final: bool) -> Tuple[str, int]: # type: ignore |
| if errors != 'strict': |
| raise IDNAError('Unsupported error handling \"{}\"'.format(errors)) |
| |
| if not data: |
| return ('', 0) |
| |
| labels = _unicode_dots_re.split(data) |
| trailing_dot = '' |
| if labels: |
| if not labels[-1]: |
| trailing_dot = '.' |
| del labels[-1] |
| elif not final: |
| # Keep potentially unfinished label until the next call |
| del labels[-1] |
| if labels: |
| trailing_dot = '.' |
| |
| result = [] |
| size = 0 |
| for label in labels: |
| result.append(ulabel(label)) |
| if size: |
| size += 1 |
| size += len(label) |
| |
| result_str = '.'.join(result) + trailing_dot |
| size += len(trailing_dot) |
| return (result_str, size) |
| |
| |
| class StreamWriter(Codec, codecs.StreamWriter): |
| pass |
| |
| |
| class StreamReader(Codec, codecs.StreamReader): |
| pass |
| |
| |
| def getregentry() -> codecs.CodecInfo: |
| # Compatibility as a search_function for codecs.register() |
| return codecs.CodecInfo( |
| name='idna', |
| encode=Codec().encode, # type: ignore |
| decode=Codec().decode, # type: ignore |
| incrementalencoder=IncrementalEncoder, |
| incrementaldecoder=IncrementalDecoder, |
| streamwriter=StreamWriter, |
| streamreader=StreamReader, |
| ) |
