My share of how to write yourself a simple Redis client in Python in the weekly meeting of my company.

1. Write A Redis Client
of your own
Gao Chao
https://github.com/reterVision

2. What is Redis
https://github.com/antirez/redis
Key-Value Store
Event Driven
redis-server: a TCP server using client-server model.

3. Communication Protocol
*<param_count>
$<command_string_length>
command
$<param_string_length>
param
$<param_string_length>
param
….

4. Sample Communication
Client -> Server
Server -> Client
*3
$13
$4
HGET
$14
test:hash
$5
hello
[1,2,3,4,5,6]

5. Let’s write some code!
https://gist.github.com/reterVision/7037762

6. Pipeline
Essentially is cache all the commands you want to send to redisserver
and send them all at once when you feel good.
*3
(continue with left…)
$4
*2
HGET
$7
$9
HGETALL
test:hash
$9
$5
hello
test:hash

7. Pipeline Response
$13
<- String length of first cmd response
[1,2,3,4,5,6]
<- First cmd resp
*2
<- Parameters count of second cmd resp
$2
<- String length of 1st param of second cmd resp
55
<- 1st param of second cmd resp
$13
<- String length of 2nd param of second cmd resp
[1,2,3,4,5,6]
<- 2nd param of second cmd resp

8. More Code
https://github.com/andymccurdy/redis-py
https://github.com/nrk/redis-lua

9. Thank you!