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68 lines
1.9 KiB
Python
68 lines
1.9 KiB
Python
"""Field validators."""
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import re
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from django.core.exceptions import ValidationError
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from django.core.validators import EmailValidator, URLValidator
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from django.utils.translation import ugettext_lazy
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class HostnameValidator(object):
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"""Validator for fqdn."""
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message = ugettext_lazy("Enter a valid domain name")
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code = "invalid"
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regex = re.compile(URLValidator.host_re)
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def __init__(self, message=None, code=None):
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"""Constructor."""
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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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def __call__(self, value):
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"""Check value."""
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if len(value) > 255:
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raise ValidationError(self.message, self.code)
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if value[-1] == ".":
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# strip exactly one dot from the right, if present.
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value = value[:-1]
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if not self.regex.match(value):
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raise ValidationError(self.message, self.code)
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validate_hostname = HostnameValidator()
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class UTF8EmailValidator(EmailValidator):
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"""Validator for addresses using non-ASCII characters."""
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# unicode letters range (must be a unicode string, not a raw string)
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ul = "\u00a1-\uffff"
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ascii_set = "-!#$%&'*+/=?^_`{}|~0-9A-Z"
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user_regex_raw = (
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# dot-atom
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r"^[" + ascii_set + ul + r"]+(\.[" + ascii_set + ul + r"]+)*\Z"
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# quoted-string
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r'|^"([\001-\010\013\014\016-\037!#-\[\]-\177]|'
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r'\\[\001-\011\013\014\016-\177])*"\Z)'
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)
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user_regex = re.compile(r"(" + user_regex_raw, re.IGNORECASE)
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validate_utf8_email = UTF8EmailValidator()
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class UTF8AndEmptyUserEmailValidator(UTF8EmailValidator):
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"""Same as upper + allows empty local part."""
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user_regex = re.compile(
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r"(^$|" + UTF8EmailValidator.user_regex_raw, re.IGNORECASE)
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validate_utf8_and_empty_user_email = UTF8AndEmptyUserEmailValidator()
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