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# coding: utf-8 # Modified Work: Copyright (c) 2018, 2026, Oracle and/or its affiliates. All rights reserved. # This software is dual-licensed to you under the Universal Permissive License (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl or Apache License 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose either license. # Copyright (c) 2013-2024, Kim Davies and contributors. All rights reserved. import codecs import re from typing import Any, Optional, Tuple from .core import IDNAError, alabel, decode, encode, ulabel _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[bytes, int]: if errors != "strict": raise IDNAError('Unsupported error handling "{}"'.format(errors)) if not data: return b"", 0 labels = _unicode_dots_re.split(data) trailing_dot = b"" if labels: if not labels[-1]: trailing_dot = b"." del labels[-1] elif not final: # Keep potentially unfinished label until the next call del labels[-1] if labels: trailing_dot = b"." result = [] size = 0 for label in labels: result.append(alabel(label)) if size: size += 1 size += len(label) # Join with U+002E result_bytes = b".".join(result) + trailing_dot size += len(trailing_dot) return result_bytes, size class IncrementalDecoder(codecs.BufferedIncrementalDecoder): def _buffer_decode(self, data: Any, errors: str, final: bool) -> Tuple[str, int]: if errors != "strict": raise IDNAError('Unsupported error handling "{}"'.format(errors)) if not data: return ("", 0) if not isinstance(data, str): data = str(data, "ascii") 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 search_function(name: str) -> Optional[codecs.CodecInfo]: if name != "idna2008": return None return codecs.CodecInfo( name=name, encode=Codec().encode, decode=Codec().decode, incrementalencoder=IncrementalEncoder, incrementaldecoder=IncrementalDecoder, streamwriter=StreamWriter, streamreader=StreamReader, ) codecs.register(search_function)
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