50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
from ipaddress import IPv4Address, IPv6Address
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from .constants import HOST_REGEX, LITERAL_REGEX, USER_REGEX
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from .email_address import EmailAddress
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from .exceptions import AddressFormatError
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def _validate_ipv4_address(value: str):
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try:
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IPv4Address(address=value)
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except ValueError:
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return False
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return True
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def _validate_ipv6_address(value: str) -> bool:
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"""
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Return whether or not the `ip_str` string is a valid IPv6 address.
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"""
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try:
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IPv6Address(address=value)
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except ValueError:
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return False
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return True
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def _validate_ipv46_address(value: str) -> bool:
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return _validate_ipv4_address(value) or _validate_ipv6_address(value)
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def regex_check(email_address: EmailAddress) -> bool:
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'Slightly adjusted email regex checker from the Django project.'
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# Validate user part.
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if not USER_REGEX.match(email_address.user):
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raise AddressFormatError
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# Validate domain part.
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if email_address.domain_literal_ip:
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literal_match = LITERAL_REGEX.match(email_address.ace_domain)
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if literal_match is None:
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raise AddressFormatError
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if not _validate_ipv46_address(literal_match[1]):
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raise AddressFormatError
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else:
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if HOST_REGEX.match(email_address.ace_domain) is None:
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raise AddressFormatError
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# All validations successful.
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return True
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