May 2016
Beginner to intermediate
366 pages
8h 47m
English
Content preview from Mastering RedisBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Pub/Sub RESP replies
In Redis Pub/Sub, the messaging format is in RESP Array reply with three or four elements. The first element in the Pub/Sub messaging format determines the type of message and can be one of these four Redis commands, SUBSCRIBE, UNSCRIBE, PSUBSCRIBE, and PUNSUBSCRIBE.
SUBSCRIBE and UNSUBSCRIBE RESP Arrays
Connecting to a Redis instance with two connections, the first with a standard Redis CLI client and the second with telnet, we will illustrate the RESP reply for three element commands SUBSCRIBE and UNSUBSCRIBE:
$ telnet localhost 6379 Trying ::1... Connected to localhost. Escape character is '^]'. SUBSCRIBE info *3 $9 subscribe $4 info :1
In this SUBSCRIBE command, the first element is $9 followed by carriage-return line feed. ...
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