get_current_user doesn't work (OAuth2PasswordBearer problems) - fastapi

Question

This is actually the first time it doesn't work, I mean I've practiced this before, but now I have no idea what's wrong.
So I am trying to implement basic function get_current_user for FastAPI , but somehow it doesn't work.
When I try in swagger Authorization works fine, but endpoint with current user simply doesn't work.
So this is part that belongs to endpoint file:
router = APIRouter(prefix='/api/v1/users')
router1 = APIRouter()
oauth2_scheme = OAuth2PasswordBearer(tokenUrl='/api-token-auth/')
#router1.post('/api-token-auth/')
async def auth(form: OAuth2PasswordRequestForm = Depends(), db: Session = Depends(get_db)):
user = await utils.get_user_by_username(form.username, db) # type: User
if not user:
raise HTTPException(status_code=400, detail="Incorrect username or password")
if not utils.validate_password(form.password, user.hashed_password):
raise HTTPException(status_code=400, detail="Incorrect username or password")
return await utils.create_token(user.id, db)
async def get_current_user(token: str = Depends(oauth2_scheme), db: Session = Depends(get_db)):
print(token)
user = await utils.get_user_by_token(token, db)
if not user:
raise HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Invalid authentication credentials",
headers={"WWW-Authenticate": "Bearer"},
)
return user
#router.get("/me", response_model=DisplayUser)
async def read_users_me(current_user: User = Depends(get_current_user)):
return current_user
and this is function that creates token (I have checked and it is 1000% works and returns string):
async def create_token(user_id: int, db: Session):
"""Token generation"""
letters = string.ascii_lowercase
token = ''.join(random.choice(letters) for _ in range(25))
created_token = Token(
expires=datetime.now() + timedelta(weeks=2),
user_id=user_id,
token=token
)
db.add(created_token)
db.commit()
db.refresh(created_token)
token = AuthUser.from_orm(created_token)
return token.token
But when I print(token) in get_current_user function it prints undefined . And I dunno why. Am I using dependency wrong or something?
Thanks in advance!

Answer 1

Since it prints undefined it seems like the frontend is expecting the response in a different format (since undefined is what using an undefined object key in Javascript as a key will result in).
The OAuth2 response should have the token under access_token by default:
access_token (required) The access token string as issued by the authorization server.
token_type (required) The type of token this is, typically just the string “bearer”.
Example response from the above link:
{
"access_token":"MTQ0NjJkZmQ5OTM2NDE1ZTZjNGZmZjI3",
"token_type":"bearer",
"expires_in":3600,
"refresh_token":"IwOGYzYTlmM2YxOTQ5MGE3YmNmMDFkNTVk",
"scope":"create"
}

Answer 2

In your "create_token(user.id, db)" ensure the returned token contains these two values.
{
"access_token":"",
"token_type":"bearer"
}