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c++zeromq

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

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.

Solution

  • 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;