annotate env/lib/python3.7/site-packages/idna/codec.py @ 0:26e78fe6e8c4 draft

"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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1 from .core import encode, decode, alabel, ulabel, IDNAError
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2 import codecs
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3 import re
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4
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5 _unicode_dots_re = re.compile(u'[\u002e\u3002\uff0e\uff61]')
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6
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7 class Codec(codecs.Codec):
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8
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9 def encode(self, data, errors='strict'):
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10
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11 if errors != 'strict':
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12 raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
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13
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14 if not data:
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15 return "", 0
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16
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17 return encode(data), len(data)
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18
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19 def decode(self, data, errors='strict'):
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20
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21 if errors != 'strict':
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22 raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
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23
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24 if not data:
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25 return u"", 0
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26
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27 return decode(data), len(data)
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28
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29 class IncrementalEncoder(codecs.BufferedIncrementalEncoder):
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30 def _buffer_encode(self, data, errors, final):
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31 if errors != 'strict':
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32 raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
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33
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34 if not data:
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35 return ("", 0)
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36
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37 labels = _unicode_dots_re.split(data)
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38 trailing_dot = u''
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39 if labels:
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40 if not labels[-1]:
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41 trailing_dot = '.'
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42 del labels[-1]
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43 elif not final:
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44 # Keep potentially unfinished label until the next call
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45 del labels[-1]
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46 if labels:
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47 trailing_dot = '.'
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48
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49 result = []
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50 size = 0
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51 for label in labels:
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52 result.append(alabel(label))
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53 if size:
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54 size += 1
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55 size += len(label)
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56
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57 # Join with U+002E
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58 result = ".".join(result) + trailing_dot
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59 size += len(trailing_dot)
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60 return (result, size)
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61
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62 class IncrementalDecoder(codecs.BufferedIncrementalDecoder):
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63 def _buffer_decode(self, data, errors, final):
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64 if errors != 'strict':
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65 raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
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66
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67 if not data:
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68 return (u"", 0)
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69
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70 # IDNA allows decoding to operate on Unicode strings, too.
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71 if isinstance(data, unicode):
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72 labels = _unicode_dots_re.split(data)
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73 else:
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74 # Must be ASCII string
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75 data = str(data)
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76 unicode(data, "ascii")
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77 labels = data.split(".")
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78
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79 trailing_dot = u''
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80 if labels:
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81 if not labels[-1]:
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82 trailing_dot = u'.'
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83 del labels[-1]
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84 elif not final:
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85 # Keep potentially unfinished label until the next call
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86 del labels[-1]
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87 if labels:
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88 trailing_dot = u'.'
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89
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90 result = []
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91 size = 0
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92 for label in labels:
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93 result.append(ulabel(label))
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94 if size:
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95 size += 1
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96 size += len(label)
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97
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98 result = u".".join(result) + trailing_dot
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99 size += len(trailing_dot)
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100 return (result, size)
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101
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102
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103 class StreamWriter(Codec, codecs.StreamWriter):
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104 pass
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105
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106 class StreamReader(Codec, codecs.StreamReader):
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107 pass
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108
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109 def getregentry():
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110 return codecs.CodecInfo(
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111 name='idna',
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112 encode=Codec().encode,
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113 decode=Codec().decode,
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114 incrementalencoder=IncrementalEncoder,
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115 incrementaldecoder=IncrementalDecoder,
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116 streamwriter=StreamWriter,
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117 streamreader=StreamReader,
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118 )