# coding=UTF-8
import json
from flask import request, current_app, Response

def check_api_key():
    api_keys = current_app.config.get("API_KEYS")
    if not api_keys:
        return
    auth = request.authorization
    if not auth or not auth.username in api_keys:
        response = json.dumps(
            {'status': 401, 'message': 'No valid API key provided'})
        return Response(
            response, 401,
            {'WWW-Authenticate': 'Basic realm="Login Required"'}
        )