How to send back acknowledge date / use message::list &ack_resp

[fnilius]

Hi, When using a python socket.io client,when receiving a message, I could send back an acknowledge message (some Json).

In socket.io-client-cpp, the signature seems to enable it as well :

void bind_events()
{
	current_socket->on("borobo.goto", sio::socket::event_listener_aux([&](string const& name, message::ptr const& data, bool isAck,message::list &ack_resp)
   	{
   	   	...
   	}
}

From the server side, acknowledge is asked for, so "isAck" is true. I spend a full day trying to find how to send some data back (I suppose I have to use ack_resp), but couldn't manage it. To be more precise, whatever I try to do, the server always get {"OK", true} (even if I don't write neither OK nor true in my code.

I would like, ideally, to be able send back a full Json (with 3 fields), or at least be able to send back a non-acknowledgment (for example {"OK", false}

Has one of you ever managed to send back aknoledgement with some data? If so, could you please share so code snippet? I couldn't find a single piece of code using ack_resp excepted one in chineese (https://blog.csdn.net/m0_37263637/article/details/78321560) which I didn't managed to get working either.

Thanks a lot in advance Best Felix

PS : a snippet of what I did in python :

@sio.on('test.goto',namespace='/test')
def on_message(data):
    poi=data['poi'];
    print('I received goto message : poi=', poi)
    global robot_status
    if(robot_status!='IDLE'):
        dic={'error': True, 'message':'the robot is busy'}
        print('ERROR : the robot can\'t accept POI because it is busy')
        return dic
   else
       ...

[Peanutzy]

Try this

void bind_events()
{
	current_socket->on("borobo.goto", sio::socket::event_listener_aux([&](string const& name, message::ptr const& data, bool isAck,message::list &ack_resp)
   	{
   	   	if (isAck) {
                       ack_resp.push("your data");

               }
   	}
}

This is my first time commenting in github so im sorry if i made a mistake.

[whatisor]

@Peanutzy what did you push into ack_resp for?