zeromq

Hello everyone,

I am trying out 0mq for Python <-> C++ IPC. What is interesting, whenever I send a request shorter than 5 characters from Python client to C++ server I get interesting result:
H+t
instead of just
H

But if I have at least 5 characters the message is parsed correctly… For Hello and longer I get what I send.
I don't define the buffer length anywhere so I am wondering.

In C++ server code looks like:

        zmq::message_t request;

        //  Wait for next request from client
        socket_.recv (&request);
        std::istringstream iss(static_cast<char*>(request.data()));
        std::string message;
        iss >> message;
        std::cout << "Received " << message << std::endl; // here I get strange output!

        //  Do some 'work'
        sleep(1);

        //  Send reply back to client
    ...

        print("Sending request to C++")
        self.socket.send_string("H")
        #  Get the reply.
        message = self.socket.recv()
        print("Received reply [ {} ]".format(message.decode('utf-8')))

If I send short message from C++ to Python it is parsed correctly though… Interesting.
I am sending long messages so actually it shouldn't be that terrible atm, but it may become problematic at some point.

Thank you for any insight!