node.js - 套接字IO : Number of users in a room

Question

对node.JS使用Socket.IO v.1.3.5...

如何获取房间中连接的真实用户(非 session )数量？

session 数:

 var room = io.sockets.adapter.rooms[roomId] || {};
 var numSocketsInRoom = Object.keys(room).length;

但是，如果同一用户在多个浏览器选项卡中连接，则 numSocketInRoom 会增加，因为 numSocketInRoom 是 session 数，而不是真实的用户数。

就我而言，任何套接字都将用户保存在 socket.userId 中，但我不知道如何指示它来获取房间中连接的用户数量...

谢谢!

Answer 1

我的解决方案最终是这段代码，这段代码在 join (isConnect = true) 或 leave (isConnect = false)房间:

//Get the room:
var room = io.sockets.adapter.rooms[roomId] || {};
//Declaration of number of users variable
var numUsers;

//If there are any user connected in the room, create the object
if(room.user===undefined) 
  room.user = {};

//If you join the room and have another opened session, increase the number of sessions
if(room.user[socket.request.user.id] && isConnect)
   room.user[socket.request.user.id] += 1;

//If you leave the room and have another opened session, decrease the number of sessions
else if(room.user[socket.request.user.id] && !isConnect){
    room.user[socket.request.user.id] -= 1;

    //If the number of sessions is 0, delete the user from the object
    if(room.user[socket.request.user.id]===0)
       delete room.user[socket.request.user.id];
 }
//If the user don't have any session and join the room, put 1 session in the object
else if(isConnect){
  room.user[socket.request.user.id] = 1;
}

//Get the number of users from room.user object
numUsers = Object.keys(room.user).length;