def get_public_key()

in source/token-authorizer/chalice/app.py [0:0]

• 17 lines of code
• 4 McCabe index (conditional complexity)

def get_public_key():
    """
    This function is responsible for retrieving the
    public JWK from the closest location
    """
    # Bandit B108: /tmp directory is ephemeral as this is ran on Lambda
    local_key_file = "/tmp/jwks.json" # nosec
    key = {}
    if os.path.isfile(local_key_file):
        # retrieve from the local file
        with open(local_key_file, 'rt', encoding='utf-8') as cache_file:
            key = json.loads(cache_file.read())
    else:
        # retrieve from the core API
        api_endpoint = f'{PUBLIC_API_ENDPOINT}/public_key?event_id={WAITING_ROOM_EVENT_ID}'
        try:
            response = requests.get(api_endpoint)
            if response.status_code == 200:
                with open(local_key_file, 'wt', encoding='utf-8') as cache_file:
                    cache_file.write(response.text)
                key = json.loads(response.text)
        except (OSError, RuntimeError):
            print_exception()
    return key