Files
securelens-backend/app/middleware/auth.py
2026-04-07 18:13:43 +05:30

72 lines
2.2 KiB
Python

from fastapi import Depends, HTTPException, status
from fastapi.security import OAuth2PasswordBearer, APIKeyHeader
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession
import hashlib
from app.database import get_db
from app.models.user import User
from app.models.apikey import ApiKey
from app.utils.auth import decode_access_token
oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/auth/login", auto_error=False)
api_key_header = APIKeyHeader(name="X-API-Key", auto_error=False)
async def get_current_user(
token: str | None = Depends(oauth2_scheme),
api_key: str | None = Depends(api_key_header),
db: AsyncSession = Depends(get_db),
) -> User:
if token:
user_id = decode_access_token(token)
if user_id:
result = await db.execute(select(User).where(User.id == user_id))
user = result.scalar_one_or_none()
if user:
return user
if api_key:
hashed_key = hashlib.sha256(api_key.encode()).hexdigest()
result = await db.execute(
select(User)
.join(ApiKey, User.id == ApiKey.user_id)
.where(ApiKey.hashed_key == hashed_key)
)
user = result.scalar_one_or_none()
if user:
return user
raise HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Invalid authentication credentials",
headers={"WWW-Authenticate": "Bearer"},
)
async def get_optional_user(
token: str | None = Depends(oauth2_scheme),
api_key: str | None = Depends(api_key_header),
db: AsyncSession = Depends(get_db),
) -> User | None:
if token:
user_id = decode_access_token(token)
if user_id:
result = await db.execute(select(User).where(User.id == user_id))
user = result.scalar_one_or_none()
if user:
return user
if api_key:
hashed_key = hashlib.sha256(api_key.encode()).hexdigest()
result = await db.execute(
select(User)
.join(ApiKey, User.id == ApiKey.user_id)
.where(ApiKey.hashed_key == hashed_key)
)
user = result.scalar_one_or_none()
if user:
return user
return None