import secrets

from fastapi import Depends, FastAPI, HTTPException, status
from fastapi.security import HTTPBasic, HTTPBasicCredentials

app = FastAPI()

security = HTTPBasic()


def get_current_username(credentials: HTTPBasicCredentials = Depends(security)):
 current_username_bytes = credentials.username.encode("utf8")
 correct_username_bytes = b"stanleyjobson"
 is_correct_username = secrets.compare_digest(
 current_username_bytes, correct_username_bytes
 )
 current_password_bytes = credentials.password.encode("utf8")
 correct_password_bytes = b"swordfish"
 is_correct_password = secrets.compare_digest(
 current_password_bytes, correct_password_bytes
 )
 if not (is_correct_username and is_correct_password):
 raise HTTPException(
 status_code=status.HTTP_401_UNAUTHORIZED,
 detail="Incorrect username or password",
 headers={"WWW-Authenticate": "Basic"},
 )
 return credentials.username


@app.get("/users/me")
def read_current_user(username: str = Depends(get_current_username)):
 return {"username": username}