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idna
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EDIT :: codec.py
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, )
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