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% ?l=J2R P\mˌ- ^п . ?from . import idnadata import bisect import unicodedata import re import sys from .intranges import intranges_contain _virama_combining_class = 9 _alabel_prefix = b'xn--' _unicode_dots_re = re.compile(u'[\u002e\u3002\uff0e\uff61]') if sys.version_info[0] >= 3: unicode = str unichr = chr class IDNAError(UnicodeError): """ Base exception for all IDNA-encoding related problems """ pass class IDNABidiError(IDNAError): """ Exception when bidirectional requirements are not satisfied """ pass class InvalidCodepoint(IDNAError): """ Exception when a disallowed 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): v = unicodedata.combining(unichr(cp)) if v == 0: if not unicodedata.name(unichr(cp)): raise ValueError("Unknown character in unicodedata") return v 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 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 IDNABidiE