import platform import re import urllib import urllib2 import urlparse from django.core.exceptions import ValidationError from django.utils.translation import ugettext_lazy as _ from django.utils.encoding import smart_unicode from django.utils.ipv6 import is_valid_ipv6_address # These values, if given to validate(), will trigger the self.required check. EMPTY_VALUES = (None, '', [], (), {}) try: from django.conf import settings URL_VALIDATOR_USER_AGENT = settings.URL_VALIDATOR_USER_AGENT except ImportError: # It's OK if Django settings aren't configured. URL_VALIDATOR_USER_AGENT = 'Django (http://www.djangoproject.com/)' class RegexValidator(object): regex = '' message = _(u'Enter a valid value.') code = 'invalid' def __init__(self, regex=None, message=None, code=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 # Compile the regex if it was not passed pre-compiled. if isinstance(self.regex, basestring): self.regex = re.compile(self.regex) def __call__(self, value): """ Validates that the input matches the regular expression. """ if not self.regex.search(smart_unicode(value)): raise ValidationError(self.message, code=self.code) class URLValidator(RegexValidator): regex = re.compile( r'^(?:http|ftp)s?://' # http:// or https:// r'(?:(?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+(?:[A-Z]{2,6}\.?|[A-Z0-9-]{2,}\.?)|' #domain... r'localhost|' #localhost... r'\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})' # ...or ip r'(?::\d+)?' # optional port r'(?:/?|[/?]\S+)$', re.IGNORECASE) def __init__(self, verify_exists=False, validator_user_agent=URL_VALIDATOR_USER_AGENT): super(URLValidator, self).__init__() self.verify_exists = verify_exists self.user_agent = validator_user_agent def __call__(self, value): try: super(URLValidator, self).__call__(value) except ValidationError, e: # Trivial case failed. Try for possible IDN domain if value: value = smart_unicode(value) scheme, netloc, path, query, fragment = urlparse.urlsplit(value) try: netloc = netloc.encode('idna') # IDN -> ACE except UnicodeError: # invalid domain part raise e url = urlparse.urlunsplit((scheme, netloc, path, query, fragment)) super(URLValidator, self).__call__(url) else: raise else: url = value if self.verify_exists: import warnings warnings.warn( "The URLField verify_exists argument has intractable security " "and performance issues. Accordingly, it has been deprecated.", DeprecationWarning ) headers = { "Accept": "text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5", "Accept-Language": "en-us,en;q=0.5", "Accept-Charset": "ISO-8859-1,utf-8;q=0.7,*;q=0.7", "Connection": "close", "User-Agent": self.user_agent, } url = url.encode('utf-8') # Quote characters from the unreserved set, refs #16812 url = urllib.quote(url, "!*'();:@&=+$,/?#[]") broken_error = ValidationError( _(u'This URL appears to be a broken link.'), code='invalid_link') try: req = urllib2.Request(url, None, headers) req.get_method = lambda: 'HEAD' #Create an opener that does not support local file access opener = urllib2.OpenerDirector() #Don't follow redirects, but don't treat them as errors either error_nop = lambda *args, **kwargs: True http_error_processor = urllib2.HTTPErrorProcessor() http_error_processor.http_error_301 = error_nop http_error_processor.http_error_302 = error_nop http_error_processor.http_error_307 = error_nop handlers = [urllib2.UnknownHandler(), urllib2.HTTPHandler(), urllib2.HTTPDefaultErrorHandler(), urllib2.FTPHandler(), http_error_processor] try: import ssl except ImportError: # Python isn't compiled with SSL support pass else: handlers.append(urllib2.HTTPSHandler()) map(opener.add_handler, handlers) if platform.python_version_tuple() >= (2, 6): opener.open(req, timeout=10) else: opener.open(req) except ValueError: raise ValidationError(_(u'Enter a valid URL.'), code='invalid') except: # urllib2.URLError, httplib.InvalidURL, etc. raise broken_error def validate_integer(value): try: int(value) except (ValueError, TypeError): raise ValidationError('') class EmailValidator(RegexValidator): def __call__(self, value): try: super(EmailValidator, self).__call__(value) except ValidationError, e: # Trivial case failed. Try for possible IDN domain-part if value and u'@' in value: parts = value.split(u'@') try: parts[-1] = parts[-1].encode('idna') except UnicodeError: raise e super(EmailValidator, self).__call__(u'@'.join(parts)) else: raise email_re = 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 r')@((?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+[A-Z]{2,6}\.?$)' # domain r'|\[(25[0-5]|2[0-4]\d|[0-1]?\d?\d)(\.(25[0-5]|2[0-4]\d|[0-1]?\d?\d)){3}\]$', re.IGNORECASE) # literal form, ipv4 address (SMTP 4.1.3) validate_email = EmailValidator(email_re, _(u'Enter a valid e-mail address.'), 'invalid') slug_re = re.compile(r'^[-\w]+$') validate_slug = RegexValidator(slug_re, _(u"Enter a valid 'slug' consisting of letters, numbers, underscores or hyphens."), 'invalid') ipv4_re = re.compile(r'^(25[0-5]|2[0-4]\d|[0-1]?\d?\d)(\.(25[0-5]|2[0-4]\d|[0-1]?\d?\d)){3}$') validate_ipv4_address = RegexValidator(ipv4_re, _(u'Enter a valid IPv4 address.'), 'invalid') def validate_ipv6_address(value): if not is_valid_ipv6_address(value): raise ValidationError(_(u'Enter a valid IPv6 address.'), code='invalid') def validate_ipv46_address(value): try: validate_ipv4_address(value) except ValidationError: try: validate_ipv6_address(value) except ValidationError: raise ValidationError(_(u'Enter a valid IPv4 or IPv6 address.'), code='invalid') ip_address_validator_map = { 'both': ([validate_ipv46_address], _('Enter a valid IPv4 or IPv6 address.')), 'ipv4': ([validate_ipv4_address], _('Enter a valid IPv4 address.')), 'ipv6': ([validate_ipv6_address], _('Enter a valid IPv6 address.')), } def ip_address_validators(protocol, unpack_ipv4): """ Depending on the given parameters returns the appropriate validators for the GenericIPAddressField. This code is here, because it is exactly the same for the model and the form field. """ if protocol != 'both' and unpack_ipv4: raise ValueError( "You can only use `unpack_ipv4` if `protocol` is set to 'both'") try: return ip_address_validator_map[protocol.lower()] except KeyError: raise ValueError("The protocol '%s' is unknown. Supported: %s" % (protocol, ip_address_validator_map.keys())) comma_separated_int_list_re = re.compile('^[\d,]+$') validate_comma_separated_integer_list = RegexValidator(comma_separated_int_list_re, _(u'Enter only digits separated by commas.'), 'invalid') class BaseValidator(object): compare = lambda self, a, b: a is not b clean = lambda self, x: x message = _(u'Ensure this value is %(limit_value)s (it is %(show_value)s).') code = 'limit_value' def __init__(self, limit_value): self.limit_value = limit_value def __call__(self, value): cleaned = self.clean(value) params = {'limit_value': self.limit_value, 'show_value': cleaned} if self.compare(cleaned, self.limit_value): raise ValidationError( self.message % params, code=self.code, params=params, ) class MaxValueValidator(BaseValidator): compare = lambda self, a, b: a > b message = _(u'Ensure this value is less than or equal to %(limit_value)s.') code = 'max_value' class MinValueValidator(BaseValidator): compare = lambda self, a, b: a < b message = _(u'Ensure this value is greater than or equal to %(limit_value)s.') code = 'min_value' class MinLengthValidator(BaseValidator): compare = lambda self, a, b: a < b clean = lambda self, x: len(x) message = _(u'Ensure this value has at least %(limit_value)d characters (it has %(show_value)d).') code = 'min_length' class MaxLengthValidator(BaseValidator): compare = lambda self, a, b: a > b clean = lambda self, x: len(x) message = _(u'Ensure this value has at most %(limit_value)d characters (it has %(show_value)d).') code = 'max_length'