Coverage for idna/core.py: 14%

# Coverage for idna/core.py : 14%

## 275 statements 38 run 237 missing 0 excluded

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 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or unallocated codepoint is used """ pass class InvalidCodepointContext(IDNAError): """ Exception when the codepoint is not valid in the context it is used """ pass def _combining_class(cp): return unicodedata.combining(unichr(cp)) def _is_script(cp, script): return intranges_contain(ord(cp), idnadata.scripts[script]) def _punycode(s): return s.encode('punycode') def _unot(s): return 'U+{0:04X}'.format(s) def valid_label_length(label): if len(label) > 63: return False return True def valid_string_length(label, trailing_dot): if len(label) > (254 if trailing_dot else 253): return False return True def check_bidi(label, check_ltr=False): # Bidi rules should only be applied if string contains RTL characters bidi_label = False for (idx, cp) in enumerate(label, 1): direction = unicodedata.bidirectional(cp) if direction == '': # String likely comes from a newer version of Unicode raise IDNABidiError('Unknown directionality in label {0} at position {1}'.format(repr(label), idx)) if direction in ['R', 'AL', 'AN']: bidi_label = True break if not bidi_label and not check_ltr: return True # Bidi rule 1 direction = unicodedata.bidirectional(label[0]) if direction in ['R', 'AL']: rtl = True elif direction == 'L': rtl = False else: raise IDNABidiError('First codepoint in label {0} must be directionality L, R or AL'.format(repr(label))) valid_ending = False number_type = False for (idx, cp) in enumerate(label, 1): direction = unicodedata.bidirectional(cp) if rtl: # Bidi rule 2 if not direction in ['R', 'AL', 'AN', 'EN', 'ES', 'CS', 'ET', 'ON', 'BN', 'NSM']: raise IDNABidiError('Invalid direction for codepoint at position {0} in a right-to-left label'.format(idx)) # Bidi rule 3 if direction in ['R', 'AL', 'EN', 'AN']: valid_ending = True elif direction != 'NSM': valid_ending = False # Bidi rule 4 if direction in ['AN', 'EN']: if not number_type: number_type = direction else: if number_type != direction: raise IDNABidiError('Can not mix numeral types in a right-to-left label') else: # Bidi rule 5 if not direction in ['L', 'EN', 'ES', 'CS', 'ET', 'ON', 'BN', 'NSM']: raise IDNABidiError('Invalid direction for codepoint at position {0} in a left-to-right label'.format(idx)) # Bidi rule 6 if direction in ['L', 'EN']: valid_ending = True elif direction != 'NSM': valid_ending = False if not valid_ending: raise IDNABidiError('Label ends with illegal codepoint directionality') return True def check_initial_combiner(label): if unicodedata.category(label[0])[0] == 'M': raise IDNAError('Label begins with an illegal combining character') return True def check_hyphen_ok(label): if label[2:4] == '--': raise IDNAError('Label has disallowed hyphens in 3rd and 4th position') if label[0] == '-' or label[-1] == '-': raise IDNAError('Label must not start or end with a hyphen') return True def check_nfc(label): if unicodedata.normalize('NFC', label) != label: raise IDNAError('Label must be in Normalization Form C') def valid_contextj(label, pos): cp_value = ord(label[pos]) if cp_value == 0x200c: if pos > 0: if _combining_class(ord(label[pos - 1])) == _virama_combining_class: return True ok = False for i in range(pos-1, -1, -1): joining_type = idnadata.joining_types.get(ord(label[i])) if joining_type == ord('T'): continue if joining_type in [ord('L'), ord('D')]: ok = True break if not ok: return False ok = False for i in range(pos+1, len(label)): joining_type = idnadata.joining_types.get(ord(label[i])) if joining_type == ord('T'): continue if joining_type in [ord('R'), ord('D')]: ok = True break return ok if cp_value == 0x200d: if pos > 0: if _combining_class(ord(label[pos - 1])) == _virama_combining_class: return True return False else: return False def valid_contexto(label, pos, exception=False): cp_value = ord(label[pos]) if cp_value == 0x00b7: if 0 < pos < len(label)-1: if ord(label[pos - 1]) == 0x006c and ord(label[pos + 1]) == 0x006c: return True return False elif cp_value == 0x0375: if pos < len(label)-1 and len(label) > 1: return _is_script(label[pos + 1], 'Greek') return False elif cp_value == 0x05f3 or cp_value == 0x05f4: if pos > 0: return _is_script(label[pos - 1], 'Hebrew') return False elif cp_value == 0x30fb: for cp in label: if cp == u'\u30fb': continue if _is_script(cp, 'Hiragana') or _is_script(cp, 'Katakana') or _is_script(cp, 'Han'): return True return False elif 0x660 <= cp_value <= 0x669: for cp in label: if 0x6f0 <= ord(cp) <= 0x06f9: return False return True elif 0x6f0 <= cp_value <= 0x6f9: for cp in label: if 0x660 <= ord(cp) <= 0x0669: return False return True def check_label(label): if isinstance(label, (bytes, bytearray)): label = label.decode('utf-8') if len(label) == 0: raise IDNAError('Empty Label') check_nfc(label) check_hyphen_ok(label) check_initial_combiner(label) for (pos, cp) in enumerate(label): cp_value = ord(cp) if intranges_contain(cp_value, idnadata.codepoint_classes['PVALID']): continue elif intranges_contain(cp_value, idnadata.codepoint_classes['CONTEXTJ']): if not valid_contextj(label, pos): raise InvalidCodepointContext('Joiner {0} not allowed at position {1} in {2}'.format(_unot(cp_value), pos+1, repr(label))) elif intranges_contain(cp_value, idnadata.codepoint_classes['CONTEXTO']): if not valid_contexto(label, pos): raise InvalidCodepointContext('Codepoint {0} not allowed at position {1} in {2}'.format(_unot(cp_value), pos+1, repr(label))) else: raise InvalidCodepoint('Codepoint {0} at position {1} of {2} not allowed'.format(_unot(cp_value), pos+1, repr(label))) check_bidi(label) def alabel(label): try: label = label.encode('ascii') try: ulabel(label) except IDNAError: raise IDNAError('The label {0} is not a valid A-label'.format(label)) if not valid_label_length(label): raise IDNAError('Label too long') return label except UnicodeEncodeError: pass if not label: raise IDNAError('No Input') label = unicode(label) check_label(label) label = _punycode(label) label = _alabel_prefix + label if not valid_label_length(label): raise IDNAError('Label too long') return label def ulabel(label): if not isinstance(label, (bytes, bytearray)): try: label = label.encode('ascii') except UnicodeEncodeError: check_label(label) return label label = label.lower() if label.startswith(_alabel_prefix): label = label[len(_alabel_prefix):] else: check_label(label) return label.decode('ascii') label = label.decode('punycode') check_label(label) return label def uts46_remap(domain, std3_rules=True, transitional=False): """Re-map the characters in the string according to UTS46 processing.""" from .uts46data import uts46data output = u"" try: for pos, char in enumerate(domain): code_point = ord(char) uts46row = uts46data[code_point if code_point < 256 else bisect.bisect_left(uts46data, (code_point, "Z")) - 1] status = uts46row[1] replacement = uts46row[2] if len(uts46row) == 3 else None if (status == "V" or (status == "D" and not transitional) or (status == "3" and std3_rules and replacement is None)): output += char elif replacement is not None and (status == "M" or (status == "3" and std3_rules) or (status == "D" and transitional)): output += replacement elif status != "I": raise IndexError() return unicodedata.normalize("NFC", output) except IndexError: raise InvalidCodepoint( "Codepoint {0} not allowed at position {1} in {2}".format( _unot(code_point), pos + 1, repr(domain))) def encode(s, strict=False, uts46=False, std3_rules=False, transitional=False): if isinstance(s, (bytes, bytearray)): s = s.decode("ascii") if uts46: s = uts46_remap(s, std3_rules, transitional) trailing_dot = False result = [] if strict: labels = s.split('.') else: labels = _unicode_dots_re.split(s) while labels and not labels[0]: del labels[0] if not labels: raise IDNAError('Empty domain') if labels[-1] == '': del labels[-1] trailing_dot = True for label in labels: result.append(alabel(label)) if trailing_dot: result.append(b'') s = b'.'.join(result) if not valid_string_length(s, trailing_dot): raise IDNAError('Domain too long') return s def decode(s, strict=False, uts46=False, std3_rules=False): if isinstance(s, (bytes, bytearray)): s = s.decode("ascii") if uts46: s = uts46_remap(s, std3_rules, False) trailing_dot = False result = [] if not strict: labels = _unicode_dots_re.split(s) else: labels = s.split(u'.') while labels and not labels[0]: del labels[0] if not labels: raise IDNAError('Empty domain') if not labels[-1]: del labels[-1] trailing_dot = True for label in labels: result.append(ulabel(label)) if trailing_dot: result.append(u'') return u'.'.join(result)