from django.core.cache import cache
def exists_nonce_in_cache(nonce, request, timeout):
key_prefix = 'nonce:'
timestamp = request.timestamp
client_id = request.client_id
token = request.token
key = f'{key_prefix}{nonce}-{timestamp}-{client_id}'
if token:
key = f'{key}-{token}'
rv = bool(cache.get(key))
cache.set(key, 1, timeout=timeout)
return rv