重新连接SocketIO后重新join同一房间的问题

我试图了解为什么下面的代码由于某种原因不起作用。 基本上我想要同一个客户端能够重新join同一个房间，但不知何故，当我打印这个客户端的客户端列表后，客户端重新连接，只有这个客户端出现，其余的不在那里？

客户

var id=null, socket = null; var publicKey = null; var first = Math.random().toString(36).substring(2,8); var last = Math.random().toString(36).substring(2,8); $('#bt1').click(function(){ socket = io(); socket.on('connect',function(){ addText('Connect to server. First-Last '+ first +' '+last); }); socket.on('disconnect',function(data){ addText('Disconnect from server'); }); socket.on('verifyid_1',function(data){ id = data.id; socket.emit('verifyid_2',{id:id,publicKey:publicKey}) addText('ClientID '+id); }); socket.on('gamecreated',function(data){ publicKey = data.publicKey; addText('PublicKey '+publicKey); }); socket.on('playerrejoinroom',function(data){addText(JSON.stringify(data))}); }); $('#bt2').click(function(){ socket.connect();}); $('#bt3').click(function(){ socket.disconnect();}); $('#bt4').click(function(){ publicKey = $('#input').val(); addText('PublicKey '+publicKey+' is entered'); socket.emit('joinroom',{publicKey:publicKey}); }); $('#bt5').click(function(){ addText('Create new game with clientID '+id); socket.emit('creategame',{id:id,NumberOfPlayers:5,UserInfo:{first:first,last:last}}); }); function addText(text){ // this juts logs to a chatbox on screen $('#messages').append($('<li>').text(text)); $('#console').scrollTop($('#console').prop("scrollHeight")); } 

服务器

 io.on('connection', function(socket){ var id = socket.id; var publicKey = null; console.log('a user connected with id '+id); socket.emit('verifyid_1',{id:id}); socket.on('verifyid_2',function(data){ if (id != data.id) {console.log('___Old client reconnects '+data.id);} console.log('___Double check '+id); if (util.isExists(data.publicKey)) { // this function just check if the obj exists or not socket.join(publicKey); // if publickey exists, this socket should join the previous room identified by publicKey listClientsInRoom(publicKey); } }); socket.on('disconnect', function(){ console.log('user#'+id+' disconnected '+util.isExists(io.sockets.adapter.rooms[publicKey])); if (!util.isExists(io.sockets.adapter.rooms[publicKey])) return; listClientsInRoom(publicKey); }); socket.on('creategame',function(data){ var owner = {id:data.id, first:data.UserInfo.first, last:data.UserInfo.last}; var newpublicKey = controller.addGameSession(data.NumberOfPlayers,owner); socket.join(newpublicKey); publicKey = newpublicKey; socket.emit('gamecreated',{publicKey:publicKey}); }); socket.on('joinroom',function(data){ console.log("Joinroom for client "+id+" to room: "+data.publicKey); socket.join(data.publicKey); publicKey = data.publicKey; listClientsInRoom(publicKey); }); }); function listClientsInRoom(key){ var clients = io.sockets.adapter.rooms[key].sockets; console.log('___Clients in room:'+JSON.stringify(clients)); } 

我使用3个客户端运行时在服务器上输出：

 a user connected with id /#mxZOL2Ibr9jrsMkiAAAA ___Double check /#mxZOL2Ibr9jrsMkiAAAA a user connected with id /#oGt5s1ILXhp5tGy9AAAB ___Double check /#oGt5s1ILXhp5tGy9AAAB a user connected with id /#59OZXN32hnBWzyDVAAAC ___Double check /#59OZXN32hnBWzyDVAAAC Joinroom for client /#oGt5s1ILXhp5tGy9AAAB to room: m9xdowe7lxat088508 ___Clients in room:{"/#mxZOL2Ibr9jrsMkiAAAA":true,"/#oGt5s1ILXhp5tGy9AAAB":true} Joinroom for client /#59OZXN32hnBWzyDVAAAC to room: m9xdowe7lxat088508 ___Clients in room:{"/#mxZOL2Ibr9jrsMkiAAAA":true,"/#oGt5s1ILXhp5tGy9AAAB":true,"/#59OZXN32hnBWzyDVAAAC":true} user#/#59OZXN32hnBWzyDVAAAC disconnected true ___Clients in room:{"/#mxZOL2Ibr9jrsMkiAAAA":true,"/#oGt5s1ILXhp5tGy9AAAB":true} a user connected with id /#m4k21oL_S493uVmpAAAD ___Double check /#m4k21oL_S493uVmpAAAD ___Clients in room:{"/#m4k21oL_S493uVmpAAAD":true} 

发生了什么：

 1. Connect 3 clients by hitting connect button (bt1). 2. Client1 create new game (button bt5). Save the publicKey locally. 3. Client2 and client3 use this publicKey to join the room (button bt4) 4. Client3 disconnect (button bt3). 5. Client3 reconnect (button bt2) 6. Only ID of client3 is shown in the room of publicKey ??? 

Answer 1

我相信，重复的问题和我的代码可以帮助我find问题的地方…..：

 if (util.isExists(data.publicKey)) { socket.join(data.publicKey); // publicKey is a local variable to a newly established socke // so when the client reconnect this variable should be null by default. // I should have used data.publicKey given by the client instead. My bad listClientsInRoom(data.publicKey); } 

抱歉。 它现在有效。