How to send integer values between server and client using zeromq(zmq)?

0
votes

I have a C++ server and client code with zmq ( ZeroMQ ) lib. I would like to send integer values to the client.

I have read through the manual for zmq, but I have a problem sending anything else than a char array from the server to client.

Can anyone help me with the code? Thanks in advance.

1
c++zeromq

1 Answers

2
votes

You just need a message format.

Size efficient would be a struct:

Send side

struct Message
{
  uint32_t one;
  uint64_t two;
};

Message msg;
msg.one = 1;
msg.two = 20;
send(&msg, sizeof(Message));

Or if you want something more flexible you could send json etc

Receive side:

assuming you use cppzmq headers

Message* msg;
zmq::message_t zmsg;
sock->recv(&zmsg);
msg = (Message*)zmsg.data();
int one - msg->one;