Question

我有时间在io.sockets.clients()找到文档，所以我可以检索连接的客户端ID，用户名等。当我alert(io.sockets.clients().length.toString());它给了我正确的号码，但我需要找到数组的结构。有没有办法在不知道结构的情况下弄清楚阵列？很像php的print_r()？

到目前为止

代码：

socket.on('switchRoom', function(newroom){
    var clients = io.sockets.clients();
    socket.emit('users', clients);
});

socket.on('users', function(usernames) {
    for(var client in usernames) {
        console.log(usernames[client].id + ' disconnected: ' +     usernames[client].disconnected)
    }
});

我在'switchRoom'被触发后收到此错误

/home/ed/socket/chat/node_modules/socket.io/lib/parser.js:81
data = JSON.stringify(ev);
              ^
TypeError: Converting circular structure to JSON
at Object.stringify (native)
at Object.encodePacket (/home/ed/socket/chat/node_modules/socket.io/lib/parser.js:81:19)
at Socket.packet (/home/ed/socket/chat/node_modules/socket.io/lib/socket.js:202:21)
at Socket.emit (/home/ed/socket/chat/node_modules/socket.io/lib/socket.js:351:15)
at Socket.<anonymous> (/home/ed/socket/chat/app.js:58:10)
at Socket.$emit (events.js:64:17)
at SocketNamespace.handlePacket (/home/ed/socket/chat/node_modules/socket.io/lib/namespace.js:331:20)
at Manager.onClientMessage (/home/ed/socket/chat/node_modules/socket.io/lib/manager.js:436:38)
at WebSocket.onMessage (/home/ed/socket/chat/node_modules/socket.io/lib/transport.js:387:20)
at Parser.<anonymous> (/home/ed/socket/chat/node_modules/socket.io/lib/transports/websocket/hybi-07-12.js:38:10)

Answer 1

您是在客户端（在浏览器中）还是在服务器端执行此操作？您提到使用alert，但我不知道客户端上的clients()方法可以执行您想要的操作。

在服务器端，clients()返回Socket s as defined by this method的数组：

/**
 * Retrieves all clients as Socket instances as an array.
 *
 * @api public
 */

SocketNamespace.prototype.clients = function (room) {
  var room = this.name + (room !== undefined ?
     '/' + room : '');

  if (!this.manager.rooms[room]) {
    return [];
  }

  return this.manager.rooms[room].map(function (id) {
    return this.socket(id);
  }, this);
};

Node.js控制台和带有dev工具的浏览器提供了一个允许调试的console对象;一般来说，你可以在console.log(something) something几乎任何地方打电话socket.set;在对象的情况下，对象的细节将以这种或那种方式枚举。

[编辑]

由于您已经使用// server socket.on('connection', function(socket) { ... socket.on('disconnect', function() { socket.get('username', function (err, name) { socket.broadcast.emit('disconnected', name); }); }); ... }); // client socket.on('connect', function () { ... socket.on('disconnected', function(name) { console.log(name + " disconnected."); }); ... });存储用户名，也许您可以尝试这样的事情：

{{1}}

Socket.IO获取连接的客户端列表

1 个答案: