Check if `remote` is allowed to make a CORS request.

def is_remote_allowed(remote):
  """
  Check if `remote` is allowed to make a CORS request.
  """
  if settings.debug:
    return True
  if not remote:
    return False
  for domain_pattern in settings.node['cors_whitelist_domains']:
    if domain_pattern.match(remote):
      return True
  return False