客户端加入时未调用事件 'connect'

Question

对于下面的 publish/subscribe 示例，我无法让它工作。我运行脚本，然后我用

启动命令 window

telnet 127.0.0.1 8888

然后命令window完全变黑。我什至没有看到预期的 joined! 消息，但是当我输入内容时，我确实得到了 written

var events = require('events');
var net = require('net');

var channel = new events.EventEmitter();
channel.clients = {};
channel.subscriptions = {};

channel.on('join', function(id, client){
    this.clients[id] = client;
    this.subscriptions[id] = function(senderId, message){
        if(id != senderId){
            this.clients[id].write(message);
        }
    }
    this.on('broadcast', this.subscriptions[id]);
});

var server = net.createServer(function(client){
    var id = client.remoteAddress + ':' + client.remotePort;
    client.on('connect', function(){
        channel.emit('join', id, client);
        console.log('joined!')
    });
    client.on('data', function(data){
        data = data.toString();
        channel.emit('broadcast', id, data);
        console.log('written');
    });
});

server.listen(8888);

我正在使用 Windows 10 和通用客户端 telnet 功能。我也开了8888端口，虽然是运行 in 'localhost'

我错过了什么吗？或者是什么原因因为 'connect' 事件没有被引发？（这引发了 channel.emit('join', id, client) 从未执行

Answer 1

client.on('connect', ...) 对服务器端没有意义（仅客户端）。您拥有该行的回调是客户端连接时调用的回调。所以就这样做：

var server = net.createServer(function(client){
    var id = client.remoteAddress + ':' + client.remotePort;
    channel.emit('join', id, client);
    console.log('joined!')
    client.on('data', function(data){
        data = data.toString();
        channel.emit('broadcast', id, data);
        console.log('written');
    });
});

客户端加入时未调用事件 'connect'

Event 'connect' not being called when a client joins

node.js

telnet