Question

我正在尝试使用Socket.IO创建一个带有Node.JS和Websocket的简单聊天App。我通过这个German tutorial启发了自己，对于单个后端实例，它运作良好。

我希望在后端有2个服务器实例，它们应该在彼此之间同步聊天消息，并将聊天记录存储在redis中。当新的聊天室加入时，客户端应显示当前频道的最后10条消息。

我尝试应用此stackoverflow page的解决方案，但我遇到了一些问题。首先我得到

WebSocket连接到'ws：// localhost：8080 / socket.io /？EIO = 3＆amp; transport = websocket＆amp; sid = LEqGvY0CVk9YaSzBAAAA'失败：连接在收到握手响应之前关闭

控制台中出现

错误。其次，两个客户端都在1秒的时间间隔内收到“有效载荷”消息。我可能不明白redis-sync机制是如何工作的，我还不知道如何显示聊天记录。

到目前为止，这是我的代码：

var conf = require('./config.json');
var cluster = require('cluster');
var os = require('os');

if (cluster.isMaster) {
  // we create a HTTP server, but we do not use listen
  // that way, we have a socket.io server that doesn't accept     connections
  var server = require('http').createServer();
  var io = require('socket.io').listen(server);
  var redis = require('socket.io-redis');

    io.adapter(redis({ host: conf.redisUri, port: conf.redisPort }));

  setInterval(function() {
    // all workers will receive this in Redis, and emit
    io.emit('chat', {time: new Date(), text:'payload'});
  }, conf.syncIntervall);

// set number of workers
  for (var i = 0; i < conf.numberOfWorkers; i++) {
    cluster.fork();
  }

  cluster.on('exit', function(worker, code, signal) {
    console.log('worker ' + worker.process.pid + ' died');
  });
}

if (cluster.isWorker) {
  var express = require('express');
  var app = express();

  var http = require('http');
  var server = http.createServer(app);
  var io = require('socket.io').listen(server);
  var redis = require('socket.io-redis');

    // Webserver
    //app.listen(conf.defaultPort);
    server.listen(conf.defaultPort);

    // deliver static files
    app.use(express.static(__dirname + '/public'));
    // route for the / path
    app.get('/', function (req, res) {
        // send the index.html in the reponse
        res.sendfile(__dirname + '/public/index.html');
    });

    // Websocket

    io.adapter(redis({ host: conf.redisUri, port: conf.redisPort }));
    // Callback when a client connects
    io.sockets.on('connection', function (socket) {
    // store the room name in the socket session for this client
    socket.room = 'defaultChannel';
    // send client to room 1
    socket.join('defaultChannel');
    // echo to client they've connected
    socket.emit('chat', { time: new Date(), text: 'You have connected to room defaultChannel on the server!' });
    socket.emit('chat', { time: new Date(), text: 'Connected to chat worker-node: ' + cluster.worker.id});
    // if a message is received
    socket.on('chat', function (data) {
        // the it will be send to all other clients
        console.log('the current channel', socket.room);
        socket.broadcast.in(socket.room).emit('chat', { time: new Date(), name: data.name || 'anonymous', text: data.text });
    });
    // if a client joins a channel
    socket.on('join', function (room) {
    // store the room name in the socket session for this client
    socket.room = room;
    // send client to room 1
    socket.join(room);
    console.log('Client joined room ' + room);
    });
});

// Log port number in the console
console.log('Server running under http://127.0.0.1:' + conf.defaultPort + '/');

}

与Node.js，Websocket - Socket.IO和Redis

0 个答案: