node.js使用zmq通信

server端

var zmq = require("zmq");  var socket = zmq.socket("req");  var counter = 0;// Just a helper function for logging to the console with a timestamp.function logToConsole (message) {    console.log("[" + new Date().toLocaleTimeString() + "] " + message);}function sendMessage (message) {    logToConsole("Sending: " + message);  socket.send(message);}// Add a callback for the event that is invoked when we receive a message.socket.on("message", function (message) {    // Convert the message into a string and log to the console.  logToConsole("Response: " + message.toString("utf8"));});// Begin listening for connections on all IP addresses on port 9998.socket.bind("tcp://*:9998", function (error) {    if (error) {    logToConsole("Failed to bind socket: " + error.message);    process.exit(0);  }  else {    logToConsole("Server listening on port 9998");    // Increment the counter and send the value to the clients every second.    setInterval(function () { sendMessage(counter++); }, 1000);  }});

client端

var zmq = require("zmq");  var socket = zmq.socket("rep");// Just a helper function for logging to the console with a timestamp.function logToConsole (message) {    console.log("[" + new Date().toLocaleTimeString() + "] " + message);}// Add a callback for the event that is invoked when we receive a message.socket.on("message", function (message) {    // Convert the message into a string and log to the console.  logToConsole("Received message: " + message.toString("utf8"));  // Send the message back aa a reply to the server.  socket.send(message);});// Connect to the server instance.socket.connect('tcp://127.0.0.1:9998');