MyServer.kt

import org.zeromq.ZMQ

fun main() {
    val context = ZMQ.context(1)
    
    val socket = context.socket(ZMQ.REP)
    println("Starting the server...")
    
    socket.bind("tcp://*:5897")

    while (true) {
       
        val rawRequest = socket.recv(0)
    
        val cleanRequest = String(rawRequest, 0, rawRequest.size - 1)
        println("Request received : $cleanRequest")

        var plainReply = "World "

        var rawReply = plainReply.toByteArray()

        rawReply[rawReply.size - 1] = 0

        socket.send(rawReply, 0)
    }