Mercurial > repos > rliterman > csp2

comparison CSP2/CSP2_env/env-d9b9114564458d9d-741b3de822f2aaca6c6caa4325c4afce/lib/python3.8/site-packages/idna/codec.py @ 69:33d812a61356

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planemo upload commit 2e9511a184a1ca667c7be0c6321a36dc4e3d116d
author jpayne
date Tue, 18 Mar 2025 17:55:14 -0400
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67:0e9998148a16 69:33d812a61356
1 import codecs
2 import re
3 from typing import Any, Optional, Tuple
4
5 from .core import IDNAError, alabel, decode, encode, ulabel
6
7 _unicode_dots_re = re.compile("[\u002e\u3002\uff0e\uff61]")
8
9
10 class Codec(codecs.Codec):
11 def encode(self, data: str, errors: str = "strict") -> Tuple[bytes, int]:
12 if errors != "strict":
13 raise IDNAError('Unsupported error handling "{}"'.format(errors))
14
15 if not data:
16 return b"", 0
17
18 return encode(data), len(data)
19
20 def decode(self, data: bytes, errors: str = "strict") -> Tuple[str, int]:
21 if errors != "strict":
22 raise IDNAError('Unsupported error handling "{}"'.format(errors))
23
24 if not data:
25 return "", 0
26
27 return decode(data), len(data)
28
29
30 class IncrementalEncoder(codecs.BufferedIncrementalEncoder):
31 def _buffer_encode(self, data: str, errors: str, final: bool) -> Tuple[bytes, int]:
32 if errors != "strict":
33 raise IDNAError('Unsupported error handling "{}"'.format(errors))
34
35 if not data:
36 return b"", 0
37
38 labels = _unicode_dots_re.split(data)
39 trailing_dot = b""
40 if labels:
41 if not labels[-1]:
42 trailing_dot = b"."
43 del labels[-1]
44 elif not final:
45 # Keep potentially unfinished label until the next call
46 del labels[-1]
47 if labels:
48 trailing_dot = b"."
49
50 result = []
51 size = 0
52 for label in labels:
53 result.append(alabel(label))
54 if size:
55 size += 1
56 size += len(label)
57
58 # Join with U+002E
59 result_bytes = b".".join(result) + trailing_dot
60 size += len(trailing_dot)
61 return result_bytes, size
62
63
64 class IncrementalDecoder(codecs.BufferedIncrementalDecoder):
65 def _buffer_decode(self, data: Any, errors: str, final: bool) -> Tuple[str, int]:
66 if errors != "strict":
67 raise IDNAError('Unsupported error handling "{}"'.format(errors))
68
69 if not data:
70 return ("", 0)
71
72 if not isinstance(data, str):
73 data = str(data, "ascii")
74
75 labels = _unicode_dots_re.split(data)
76 trailing_dot = ""
77 if labels:
78 if not labels[-1]:
79 trailing_dot = "."
80 del labels[-1]
81 elif not final:
82 # Keep potentially unfinished label until the next call
83 del labels[-1]
84 if labels:
85 trailing_dot = "."
86
87 result = []
88 size = 0
89 for label in labels:
90 result.append(ulabel(label))
91 if size:
92 size += 1
93 size += len(label)
94
95 result_str = ".".join(result) + trailing_dot
96 size += len(trailing_dot)
97 return (result_str, size)
98
99
100 class StreamWriter(Codec, codecs.StreamWriter):
101 pass
102
103
104 class StreamReader(Codec, codecs.StreamReader):
105 pass
106
107
108 def search_function(name: str) -> Optional[codecs.CodecInfo]:
109 if name != "idna2008":
110 return None
111 return codecs.CodecInfo(
112 name=name,
113 encode=Codec().encode,
114 decode=Codec().decode,
115 incrementalencoder=IncrementalEncoder,
116 incrementaldecoder=IncrementalDecoder,
117 streamwriter=StreamWriter,
118 streamreader=StreamReader,
119 )
120
121
122 codecs.register(search_function)