PSUBSCRIBE
订阅一个或多个符合模式的频道
PSUBSCRIBE pattern [pattern ...]
PUBLISH
发布
PUBLISH channel message
PUBSUB
查看订阅与发布系统状态。
PUBSUB subcommand [argument [argument ...]]
PUNSUBSCRIBE
退订所有给定模式的频道。
PUNSUBSCRIBE [pattern [pattern ...]]
SUBSCRIBE
订阅
SUBSCRIBE channel [channel ...]
UNSUBSCRIBE
指退订给定的频道。
UNSUBSCRIBE [channel [channel ...]]