custom-resource.py 文件源码

def can_delete_rule(stack_name, rule_id):
    result = False
    for attempt in range(API_CALL_NUM_RETRIES):
        try:
            waf = boto3.client('waf')
            rule_detail = waf.get_rule(RuleId=rule_id)
            result = (stack_name == None or (rule_detail['Rule']['Name'].startswith(stack_name + " - ") and rule_detail['Rule']['Name'] != (stack_name + " - Whitelist Rule") ))
        except Exception, e:
            print(e)
            delay = math.pow(2, attempt)
            print("[can_delete_rule] Retrying in %d seconds..." % (delay))
            time.sleep(delay)
        else:
            break
    else:
        print("[can_delete_rule] Failed ALL attempts to call API")

    return result