54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
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"""Authentication FastAPI dependencies (isolated to avoid circular imports)."""
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from typing import Optional
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from fastapi import Depends
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from fastapi.security import OAuth2PasswordBearer
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.core.db import get_async_db
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from app.core.errors import AuthenticationError
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from app.core.security import verify_token
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from app.features.user.service import UserService
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/auth/login")
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oauth2_scheme_optional = OAuth2PasswordBearer(
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tokenUrl="/api/auth/login", auto_error=False
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)
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async def get_current_user(
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token: str = Depends(oauth2_scheme),
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db: AsyncSession = Depends(get_async_db),
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):
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"""Resolve authenticated user from JWT access token."""
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payload = verify_token(token)
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if payload is None:
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raise AuthenticationError("无法验证凭据")
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user_id: str | None = payload.get("sub")
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if user_id is None:
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raise AuthenticationError("无法验证凭据")
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if payload.get("type") != "access":
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raise AuthenticationError("无法验证凭据")
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user = await UserService(db).get_by_id(user_id)
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if user is None:
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raise AuthenticationError("无法验证凭据")
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return user
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async def get_optional_user(
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token: Optional[str] = Depends(oauth2_scheme_optional),
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db: AsyncSession = Depends(get_async_db),
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):
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"""Return user if a valid token is provided, else None."""
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if token is None:
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return None
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try:
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return await get_current_user(token, db)
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except AuthenticationError:
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return None
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