[Python] How to make Depends optional in FastAPI?

I have an API which gives images to the user and non-users. Images can be public or private.

My code:


@router.get("/{id}")
def get_resource(id: str, current_user: User = Depends(get_current_user)):
return return_resource(id, current_user)


This code enforces authorization strictly. What I want is if the user is not logged in, it should then set the current_user parameter to None, so that I can allow access to public images and restrict private.

Other codes:

get_current_user


oauth2_scheme = OAuth2PasswordBearer(tokenUrl="auth/login")

async def get_current_user(required: bool = True, token: str = Depends(oauth2_scheme)):
credentials_exception = HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Could not validate credentials",
headers={"WWW-Authenticate": "Bearer"},
)

if not required and not token:
return None

return verify_token(token, credentials_exception)


I want to send parameter like required to get_current_user

verify_token


def verify_token(token: str, credentials_exception):
try:
payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
email: str = payload.get("email")
pk: str = payload.get("pk")
if email is None:
raise credentials_exception
token_data = TokenData(
email=email,
pk = pk
)
except JWTError:
raise credentials_exception
return token_data

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