in topic_manager.go [85:95]
func (p *MNSTopicManager) GetTopicAttributes(topicName string) (attr TopicAttribute, err error) {
topicName = strings.TrimSpace(topicName)
if err = checkTopicName(topicName); err != nil {
return
}
_, err = send(p.cli, p.decoder, GET, nil, nil, "topics/"+topicName, &attr)
return
}