Decorate FastAPI endpoints with custom decorators.
Project description
FastAPI decorators
Small Python utility for wrapping your FastAPI endpoints in custom decorators.
Installation
pip install fastapi-decorators
Usage
Create a simple decorator that rejects unauthorized requests:
oauth2_scheme = OAuth2PasswordBearer(
tokenUrl="/api/v1/auth/login",
auto_error=False,
)
def authorize(*required_scopes: str):
def decorator(func):
def dependency(
token: Optional[str] = Depends(oauth2_password_scheme),
db_session: Session = Depends(get_db),
):
if token is None:
raise HTTPException(status_code=401, detail="Unauthenticated")
jwt = decode_jwt(token)
if not all(scope in jwt["scopes"] for scope in required_scopes):
raise HTTPException(status_code=403, detail="Unauthorized")
if not db_session.query(User).filter(User.id == jwt["sub"]).first():
raise HTTPException(status_code=403, detail="Unauthorized")
return add_dependencies(Depends(dependency))(func)
return decorator
The decorator can be used like so:
@app.put("/users/{user_id}")
@authorize("users:write")
def update_user(*, user_id: int, user_update: UserUpdate):
...
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