Step 2：用户 CRUD + bcrypt + JWT 真实鉴权 + RBAC 依赖

backend/app/core/deps.py

@@ -1,26 +1,54 @@
-from typing import Annotated, AsyncGenerator
+from typing import Annotated, AsyncGenerator, Callable, Iterable
+import uuid
 
 from fastapi import Depends, HTTPException, status
 from pydantic import ValidationError
 from sqlalchemy.ext.asyncio import AsyncSession
 
-from app.core.security import decode_access_token, oauth2_scheme
+from app.core.security import decode_token, oauth2_scheme
+from app.crud import user as user_crud
 from app.db.session import SessionLocal
 from app.schemas.user import TokenPayload
 
 
-async def get_db() -> AsyncGenerator[AsyncSession, None]:
+async def get_db_session() -> AsyncGenerator[AsyncSession, None]:
     async with SessionLocal() as session:
         yield session
 
 
-async def get_current_user(token: Annotated[str, Depends(oauth2_scheme)]) -> TokenPayload:
-    payload = decode_access_token(token)
+async def get_current_user(
+    token: Annotated[str, Depends(oauth2_scheme)],
+    db: Annotated[AsyncSession, Depends(get_db_session)],
+):
+    payload = decode_token(token)
     try:
-        return TokenPayload(**payload)
+        token_data = TokenPayload(**payload)
     except ValidationError as exc:
         raise HTTPException(
             status_code=status.HTTP_401_UNAUTHORIZED,
             detail="Could not validate credentials",
             headers={"WWW-Authenticate": "Bearer"},
         ) from exc
+
+    user = await user_crud.get_by_id(db, uuid.UUID(str(token_data.sub)))
+    if not user or not user.is_active:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Inactive or missing user",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    return user
+
+
+def require_roles(roles: Iterable[str]) -> Callable:
+    roles_set = set(roles)
+
+    async def dependency(current_user=Depends(get_current_user)):
+        if current_user.role not in roles_set:
+            raise HTTPException(
+                status_code=status.HTTP_403_FORBIDDEN,
+                detail="Insufficient permissions",
+            )
+        return current_user
+
+    return dependency