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

backend/app/core/security.py

@@ -4,21 +4,25 @@ from typing import Any, Dict, Optional
 from fastapi import HTTPException, status
 from fastapi.security import OAuth2PasswordBearer
 from jose import JWTError, jwt
+from passlib.context import CryptContext
 
 from app.core.config import settings
 
 
 ALGORITHM = "HS256"
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
 oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/v1/auth/login", scheme_name="Bearer")
 
 
-def create_access_token(*, subject: str, role: str, expires_delta: Optional[timedelta] = None) -> str:
-    expire = datetime.now(timezone.utc) + (expires_delta or timedelta(minutes=settings.JWT_EXPIRE_MINUTES))
-    to_encode: Dict[str, Any] = {"sub": subject, "role": role, "exp": expire}
+def create_access_token(*, user_id: str, role: str, expires_minutes: Optional[int] = None) -> str:
+    expire = datetime.now(timezone.utc) + timedelta(
+        minutes=expires_minutes or settings.JWT_EXPIRE_MINUTES
+    )
+    to_encode: Dict[str, Any] = {"sub": user_id, "role": role, "exp": expire}
     return jwt.encode(to_encode, settings.JWT_SECRET_KEY, algorithm=ALGORITHM)
 
 
-def decode_access_token(token: str) -> Dict[str, Any]:
+def decode_token(token: str) -> Dict[str, Any]:
     try:
         payload = jwt.decode(token, settings.JWT_SECRET_KEY, algorithms=[ALGORITHM])
     except JWTError as exc:
@@ -28,3 +32,11 @@ def decode_access_token(token: str) -> Dict[str, Any]:
             headers={"WWW-Authenticate": "Bearer"},
         ) from exc
     return payload
+
+
+def hash_password(plain_password: str) -> str:
+    return pwd_context.hash(plain_password)
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    return pwd_context.verify(plain_password, hashed_password)