65 lines
1.6 KiB
Python
65 lines
1.6 KiB
Python
"""密码重置令牌创建与校验。"""
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from __future__ import annotations
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import secrets
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from datetime import datetime, timedelta
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from sqlalchemy import delete, select
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from sqlalchemy.ext.asyncio import AsyncSession
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from models.models import PasswordResetToken, User
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def _token_expires_at(hours: int) -> datetime:
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return datetime.utcnow() + timedelta(hours=max(1, min(168, int(hours or 24))))
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async def invalidate_user_reset_tokens(db: AsyncSession, user_id: int) -> None:
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await db.execute(
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delete(PasswordResetToken).where(PasswordResetToken.user_id == user_id)
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)
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async def create_password_reset_token(
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db: AsyncSession,
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user: User,
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expire_hours: int = 24,
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) -> str:
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await invalidate_user_reset_tokens(db, user.id)
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token = secrets.token_urlsafe(32)
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db.add(
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PasswordResetToken(
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user_id=user.id,
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token=token,
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expires_at=_token_expires_at(expire_hours),
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)
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)
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await db.flush()
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return token
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async def verify_password_reset_token(db: AsyncSession, token: str) -> User | None:
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value = (token or "").strip()
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if not value:
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return None
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result = await db.execute(
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select(PasswordResetToken, User)
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.join(User, User.id == PasswordResetToken.user_id)
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.where(PasswordResetToken.token == value)
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)
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row = result.first()
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if not row:
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return None
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record, user = row
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if record.expires_at < datetime.utcnow():
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await db.delete(record)
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await db.flush()
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return None
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await db.delete(record)
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await db.flush()
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return user
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