socket.join不起作用（socket.io）

Question

因此，我的socket.join调用无济于事。调用socket.join之后，然后列出该套接字所在的房间，该套接字仅连接到其ID定义的房间（它是自己的房间）。

function onJoin(room) {
    console.log("Joining room: " + room);
    socket.join(room);
    console.log(socket.id + " now in rooms ", socket.rooms);
}

例如将打印：

> Joining room: 5aba92759b9ffa9fdf579714d6aa125ddb05cb1172611331775e7a69dab37258
> Q6D4h17DvdOZrbrEAAAC now in rooms  { Q6D4h17DvdOZrbrEAAAC: 'Q6D4h17DvdOZrbrEAAAC' }

如果有所作为，请按以下步骤创建套接字服务器：

//app.js
var app = express();
var http = require('http');
var server = http.Server(app);
var io = require('socket.io')(server);
var chat = require('./routes/chat/chat')(io);

//chat.js
module.exports = function(io) {
  io.sockets.on('connection', function(socket) {

    socket.on('join', onJoin);
    ...
}

问题在哪里？

• Socket.io v1.7.3

Answer 1

问题是那socket.join是异步的。因此，这将按预期工作：

socket.join(room, function() {
  console.log("Socket now in rooms", socket.rooms);
});

Answer 2

使用：io.sockets.adapter.rooms

function onJoin(room) {
     console.log("Joining room: " + room);
     socket.join(room);
     console.log(socket.id + " now in rooms ", getRoomsByUser(socket.id));
}

function getRoomsByUser(id){
    let usersRooms = [];
    let rooms = io.sockets.adapter.rooms;

    for(let room in rooms){
        if(rooms.hasOwnProperty(room)){
            let sockets = rooms[room].sockets;
            if(id in sockets)
                usersRooms.push(room);          
        }
    }

    return usersRooms;
}

加入“test”后你会看到这样的内容：

AEi6eIlkutIcm_CwAAAB now in rooms test,AEi6eIlkutIcm_CwAAAB