Redis 4.x Cookbook

How to do it...

To understand the Redis protocol, take the following steps:

1. Send the PING command to the Redis Server with netcat:

Instead of sending the command PING in redis-cli, let's build the command using RESP:

$ echo -e "*1\r\n\$4\r\nPING\r\n" | nc  127.0.0.1 6379+PONG

 

2. Use the SET and INCR commands to set an integer and increase it by one:

$ echo -e "*3\r\n\$3\r\nset\r\n\$5\r\nmykey\r\n\$1\r\n1\r\n" | nc 127.0.0.1 6379+OK$ echo -e "*2\r\n\$4\r\nINCR\r\n\$5\r\nmykey\r\n" | nc 127.0.0.1 6379:2

You may encounter the following error when you send a non-existent command:

$ echo -e "*2\r\n\$3\r\ngot\r\n\$3\r\nfoo\r\n" | nc 127.0.0.1 6379-ERR unknown command 'got'

Multi-commands can be combined and sent to the Redis Server in a single ...