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23 lines
994 B
Python
23 lines
994 B
Python
import re
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from django.core.exceptions import ValidationError
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from django.utils.translation import gettext as _
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def validate_domain(domain: str | None) -> 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(r"^[a-z0-9-]*$", subdomain):
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raise ValidationError(_("Domain can only have letters, numbers, '.' and '-'s."))
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