使用golang在Redis中存储一次使用记录的最佳方法
问题描述：
I am using golang and go-redis package I would like to store a key-value pair in redis (e.g one time token). When this token is read, I generate a permanent token. But the one time token should be deleted once I have read the value. This is to avoid fast-replay attack. What is the best way to implement this. I have been thinking of mutex.
我正在使用golang和go-redis包 我想在Redis中存储键值对（例如 一次令牌）。 读取此令牌后，我将生成一个永久令牌。 但是，一旦我读取了值，就应该删除一次令牌。 这是为了避免快速重播攻击。 实现此目的的最佳方法是什么。 我一直在考虑互斥锁。 p> div>
答
This is a perfect use case for the MULTI-EXEC functionality:
MULTI
GET key
DELETE key
EXEC
Or in go:
pipe := client.TxPipeline()
get := pipe.Get("key")
pipe.Del("key")
_, err := pipe.Exec()
fmt.Println(incr.Val(), err)
This will ensure that both commands execute in a transaction, so the key will either be retrieved and deleted or not retrieved at all.