mirror of https://github.com/zulip/zulip.git
24 lines
1.0 KiB
Python
24 lines
1.0 KiB
Python
from django.core.exceptions import ValidationError
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from django.utils.translation import ugettext as _
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from typing import Optional
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import re
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def validate_domain(domain: Optional[str]) -> None:
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if domain is None or len(domain) == 0:
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raise ValidationError(_("Domain can't be empty."))
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if '.' not in domain:
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raise ValidationError(_("Domain must have at least one dot (.)"))
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if len(domain) > 255:
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raise ValidationError(_("Domain is too long"))
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if domain[0] == '.' or domain[-1] == '.':
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raise ValidationError(_("Domain cannot start or end with a dot (.)"))
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for subdomain in domain.split('.'):
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if not subdomain:
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raise ValidationError(_("Consecutive '.' are not allowed."))
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if subdomain[0] == '-' or subdomain[-1] == '-':
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raise ValidationError(_("Subdomains cannot start or end with a '-'."))
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if not re.match('^[a-z0-9-]*$', subdomain):
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raise ValidationError(_("Domain can only have letters, numbers, '.' and '-'s."))
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