191 lines
7.1 KiB
Python
191 lines
7.1 KiB
Python
import re
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import urllib2
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import urlparse
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from django.core.exceptions import ValidationError
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from django.utils.translation import ugettext_lazy as _
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from django.utils.encoding import smart_unicode
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# These values, if given to validate(), will trigger the self.required check.
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EMPTY_VALUES = (None, '', [], (), {})
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try:
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from django.conf import settings
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URL_VALIDATOR_USER_AGENT = settings.URL_VALIDATOR_USER_AGENT
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except ImportError:
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# It's OK if Django settings aren't configured.
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URL_VALIDATOR_USER_AGENT = 'Django (http://www.djangoproject.com/)'
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class RegexValidator(object):
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regex = ''
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message = _(u'Enter a valid value.')
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code = 'invalid'
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def __init__(self, regex=None, message=None, code=None):
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if regex is not None:
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self.regex = regex
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if message is not None:
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self.message = message
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if code is not None:
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self.code = code
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if isinstance(self.regex, basestring):
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self.regex = re.compile(regex)
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def __call__(self, value):
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"""
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Validates that the input matches the regular expression.
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"""
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if not self.regex.search(smart_unicode(value)):
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raise ValidationError(self.message, code=self.code)
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class HeadRequest(urllib2.Request):
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def get_method(self):
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return "HEAD"
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class URLValidator(RegexValidator):
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regex = re.compile(
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r'^(?:http|ftp)s?://' # http:// or https://
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r'(?:(?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+(?:[A-Z]{2,6}\.?|[A-Z0-9-]{2,}\.?)|' #domain...
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r'localhost|' #localhost...
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r'\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})' # ...or ip
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r'(?::\d+)?' # optional port
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r'(?:/?|[/?]\S+)$', re.IGNORECASE)
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def __init__(self, verify_exists=False, validator_user_agent=URL_VALIDATOR_USER_AGENT):
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super(URLValidator, self).__init__()
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self.verify_exists = verify_exists
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self.user_agent = validator_user_agent
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def __call__(self, value):
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try:
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super(URLValidator, self).__call__(value)
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except ValidationError, e:
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# Trivial case failed. Try for possible IDN domain
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if value:
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value = smart_unicode(value)
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scheme, netloc, path, query, fragment = urlparse.urlsplit(value)
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try:
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netloc = netloc.encode('idna') # IDN -> ACE
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except UnicodeError: # invalid domain part
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raise e
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url = urlparse.urlunsplit((scheme, netloc, path, query, fragment))
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super(URLValidator, self).__call__(url)
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else:
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raise
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else:
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url = value
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if self.verify_exists:
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headers = {
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"Accept": "text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5",
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"Accept-Language": "en-us,en;q=0.5",
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"Accept-Charset": "ISO-8859-1,utf-8;q=0.7,*;q=0.7",
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"Connection": "close",
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"User-Agent": self.user_agent,
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}
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url = url.encode('utf-8')
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broken_error = ValidationError(
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_(u'This URL appears to be a broken link.'), code='invalid_link')
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try:
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req = HeadRequest(url, None, headers)
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u = urllib2.urlopen(req)
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except ValueError:
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raise ValidationError(_(u'Enter a valid URL.'), code='invalid')
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except urllib2.HTTPError, e:
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if e.code in (405, 501):
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# Try a GET request (HEAD refused)
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# See also: http://www.w3.org/Protocols/rfc2616/rfc2616.html
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try:
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req = urllib2.Request(url, None, headers)
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u = urllib2.urlopen(req)
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except:
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raise broken_error
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else:
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raise broken_error
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except: # urllib2.URLError, httplib.InvalidURL, etc.
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raise broken_error
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def validate_integer(value):
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try:
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int(value)
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except (ValueError, TypeError), e:
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raise ValidationError('')
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class EmailValidator(RegexValidator):
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def __call__(self, value):
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try:
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super(EmailValidator, self).__call__(value)
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except ValidationError, e:
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# Trivial case failed. Try for possible IDN domain-part
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if value and u'@' in value:
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parts = value.split(u'@')
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domain_part = parts[-1]
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try:
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parts[-1] = parts[-1].encode('idna')
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except UnicodeError:
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raise e
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super(EmailValidator, self).__call__(u'@'.join(parts))
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else:
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raise
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email_re = re.compile(
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r"(^[-!#$%&'*+/=?^_`{}|~0-9A-Z]+(\.[-!#$%&'*+/=?^_`{}|~0-9A-Z]+)*" # dot-atom
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r'|^"([\001-\010\013\014\016-\037!#-\[\]-\177]|\\[\001-011\013\014\016-\177])*"' # quoted-string
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r')@(?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+[A-Z]{2,6}\.?$', re.IGNORECASE) # domain
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validate_email = EmailValidator(email_re, _(u'Enter a valid e-mail address.'), 'invalid')
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slug_re = re.compile(r'^[-\w]+$')
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validate_slug = RegexValidator(slug_re, _(u"Enter a valid 'slug' consisting of letters, numbers, underscores or hyphens."), 'invalid')
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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}$')
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validate_ipv4_address = RegexValidator(ipv4_re, _(u'Enter a valid IPv4 address.'), 'invalid')
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comma_separated_int_list_re = re.compile('^[\d,]+$')
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validate_comma_separated_integer_list = RegexValidator(comma_separated_int_list_re, _(u'Enter only digits separated by commas.'), 'invalid')
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class BaseValidator(object):
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compare = lambda self, a, b: a is not b
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clean = lambda self, x: x
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message = _(u'Ensure this value is %(limit_value)s (it is %(show_value)s).')
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code = 'limit_value'
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def __init__(self, limit_value):
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self.limit_value = limit_value
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def __call__(self, value):
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cleaned = self.clean(value)
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params = {'limit_value': self.limit_value, 'show_value': cleaned}
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if self.compare(cleaned, self.limit_value):
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raise ValidationError(
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self.message % params,
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code=self.code,
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params=params,
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)
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class MaxValueValidator(BaseValidator):
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compare = lambda self, a, b: a > b
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message = _(u'Ensure this value is less than or equal to %(limit_value)s.')
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code = 'max_value'
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class MinValueValidator(BaseValidator):
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compare = lambda self, a, b: a < b
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message = _(u'Ensure this value is greater than or equal to %(limit_value)s.')
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code = 'min_value'
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class MinLengthValidator(BaseValidator):
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compare = lambda self, a, b: a < b
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clean = lambda self, x: len(x)
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message = _(u'Ensure this value has at least %(limit_value)d characters (it has %(show_value)d).')
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code = 'min_length'
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class MaxLengthValidator(BaseValidator):
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compare = lambda self, a, b: a > b
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clean = lambda self, x: len(x)
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message = _(u'Ensure this value has at most %(limit_value)d characters (it has %(show_value)d).')
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code = 'max_length'
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