31 lines
1.0 KiB
Python
31 lines
1.0 KiB
Python
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"""Lightweight email validator that tolerates internal/lab TLDs (.local, .corp, …).
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`pydantic.EmailStr` relies on `email-validator` with `globally_deliverable=True`,
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which rejects RFC 6761 special-use domains. Red-team and corporate intranet
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deployments routinely use such suffixes — we accept any RFC-shape email and
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defer deliverability checks to the operator.
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"""
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from __future__ import annotations
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import re
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from typing import Annotated
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from pydantic import AfterValidator
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# Permissive RFC-shape pattern: local-part 1..64 chars, domain has at least one
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# dot, each label is 1..63 chars of letters/digits/hyphens, total ≤ 254.
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_EMAIL_RE = re.compile(
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r"^(?=.{1,254}$)[A-Za-z0-9._%+\-]{1,64}@[A-Za-z0-9](?:[A-Za-z0-9\-]{0,61}[A-Za-z0-9])?(?:\.[A-Za-z0-9](?:[A-Za-z0-9\-]{0,61}[A-Za-z0-9])?)+$"
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)
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def _validate_email(value: str) -> str:
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v = value.strip()
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if not _EMAIL_RE.match(v):
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raise ValueError("not a valid email address")
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return v.lower()
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Email = Annotated[str, AfterValidator(_validate_email)]
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