from __future__ import unicode_literals import re from django.core.exceptions import ValidationError from django.utils import six from django.utils.deconstruct import deconstructible from django.utils.encoding import force_text from django.utils.ipv6 import is_valid_ipv6_address from django.utils.six.moves.urllib.parse import urlsplit, urlunsplit from django.utils.translation import ugettext_lazy as _, ungettext_lazy # These values, if given to validate(), will trigger the self.required check. EMPTY_VALUES = (None, '', [], (), {}) @deconstructible class RegexValidator(object): regex = '' message = _('Enter a valid value.') code = 'invalid' inverse_match = False flags = 0 def __init__(self, regex=None, message=None, code=None, inverse_match=None, flags=None): if regex is not None: self.regex = regex if message is not None: self.message = message if code is not None: self.code = code if inverse_match is not None: self.inverse_match = inverse_match if flags is not None: self.flags = flags if self.flags and not isinstance(self.regex, six.string_types): raise TypeError("If the flags are set, regex must be a regular expression string.") # Compile the regex if it was not passed pre-compiled. if isinstance(self.regex, six.string_types): self.regex = re.compile(self.regex, self.flags) def __call__(self, value): """ Validates that the input matches the regular expression if inverse_match is False, otherwise raises ValidationError. """ if not (self.inverse_match is not bool(self.regex.search( force_text(value)))): raise ValidationError(self.message, code=self.code) def __eq__(self, other): return ( isinstance(other, RegexValidator) and self.regex.pattern == other.regex.pattern and self.regex.flags == other.regex.flags and (self.message == other.message) and (self.code == other.code) and (self.inverse_match == other.inverse_match) ) def __ne__(self, other): return not (self == other) @deconstructible class URLValidator(RegexValidator): ul = '\u00a1-\uffff' # unicode letters range (must be a unicode string, not a raw string) # IP patterns ipv4_re = r'(?:25[0-5]|2[0-4]\d|[0-1]?\d?\d)(?:\.(?:25[0-5]|2[0-4]\d|[0-1]?\d?\d)){3}' ipv6_re = r'\[[0-9a-f:\.]+\]' # (simple regex, validated later) # Host patterns hostname_re = r'[a-z' + ul + r'0-9](?:[a-z' + ul + r'0-9-]*[a-z' + ul + r'0-9])?' domain_re = r'(?:\.[a-z' + ul + r'0-9]+(?:[a-z' + ul + r'0-9-]*[a-z' + ul + r'0-9]+)*)*' tld_re = r'\.[a-z' + ul + r']{2,}\.?' host_re = '(' + hostname_re + domain_re + tld_re + '|localhost)' regex = re.compile( r'^(?:[a-z0-9\.\-]*)://' # scheme is validated separately r'(?:\S+(?::\S*)?@)?' # user:pass authentication r'(?:' + ipv4_re + '|' + ipv6_re + '|' + host_re + ')' r'(?::\d{2,5})?' # port r'(?:[/?#][^\s]*)?' # resource path r'$', re.IGNORECASE) message = _('Enter a valid URL.') schemes = ['http', 'https', 'ftp', 'ftps'] def __init__(self, schemes=None, **kwargs): super(URLValidator, self).__init__(**kwargs) if schemes is not None: self.schemes = schemes def __call__(self, value): value = force_text(value) # Check first if the scheme is valid scheme = value.split('://')[0].lower() if scheme not in self.schemes: raise ValidationError(self.message, code=self.code) # Then check full URL try: super(URLValidator, self).__call__(value) except ValidationError as e: # Trivial case failed. Try for possible IDN domain if value: scheme, netloc, path, query, fragment = urlsplit(value) try: netloc = netloc.encode('idna').decode('ascii') # IDN -> ACE except UnicodeError: # invalid domain part raise e url = urlunsplit((scheme, netloc, path, query, fragment)) super(URLValidator, self).__call__(url) else: raise else: # Now verify IPv6 in the netloc part host_match = re.search(r'^\[(.+)\](?::\d{2,5})?$', urlsplit(value).netloc) if host_match: potential_ip = host_match.groups()[0] try: validate_ipv6_address(potential_ip) except ValidationError: raise ValidationError(self.message, code=self.code) url = value def validate_integer(value): try: int(value) except (ValueError, TypeError): raise ValidationError(_('Enter a valid integer.'), code='invalid') @deconstructible class EmailValidator(object): message = _('Enter a valid email address.') code = 'invalid' user_regex = re.compile( r"(^[-!#$%&'*+/=?^_`{}|~0-9A-Z]+(\.[-!#$%&'*+/=?^_`{}|~0-9A-Z]+)*$" # dot-atom r'|^"([\001-\010\013\014\016-\037!#-\[\]-\177]|\\[\001-\011\013\014\016-\177])*"$)', # quoted-string re.IGNORECASE) domain_regex = re.compile( # max length of the domain is 249: 254 (max email length) minus one # period, two characters for the TLD, @ sign, & one character before @. r'(?:[A-Z0-9](?:[A-Z0-9-]{0,247}[A-Z0-9])?\.)+(?:[A-Z]{2,6}|[A-Z0-9-]{2,}(? b message = _('Ensure this value is less than or equal to %(limit_value)s.') code = 'max_value' @deconstructible class MinValueValidator(BaseValidator): compare = lambda self, a, b: a < b message = _('Ensure this value is greater than or equal to %(limit_value)s.') code = 'min_value' @deconstructible class MinLengthValidator(BaseValidator): compare = lambda self, a, b: a < b clean = lambda self, x: len(x) message = ungettext_lazy( 'Ensure this value has at least %(limit_value)d character (it has %(show_value)d).', 'Ensure this value has at least %(limit_value)d characters (it has %(show_value)d).', 'limit_value') code = 'min_length' @deconstructible class MaxLengthValidator(BaseValidator): compare = lambda self, a, b: a > b clean = lambda self, x: len(x) message = ungettext_lazy( 'Ensure this value has at most %(limit_value)d character (it has %(show_value)d).', 'Ensure this value has at most %(limit_value)d characters (it has %(show_value)d).', 'limit_value') code = 'max_length'