使用golang在Redis中存储一次使用记录的最佳方法

Question

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.

Answer 1

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.