Interaction of CLI and server. How right?

Question

Command line

You need to write a console utility that will send commands to the server (web server). In this case, commands can be executed for several minutes. How to properly organize communication with the server? Through what protocol?
The usual POST / GET request, it seems to me, will not work. It is foolish to wait a minute for a response from the server, to occupy a worker process. Maybe something asynchronous to try or long-puling?

Answer 1

And what prevents you from sending a request to complete the task and 1 more for the status of execution?