Integrate “execute shell ” into my system?

How do i? Integrate “execute shell ” into my system?
No.1 : post:
get ws connection string.
No.2 : ws connection
No.3 : What should I do then?

The command to execute goes in the action body, and then when you connect to the WebSocket the command is executed and input/output piped through the WebSocket. Frames are base64-encoded, because binary websockets are a pain.

Thanks a lot ,have a try