消息事件多次触发,导致单个消息在收件人的框中多次出现.我已将套接字路由到exports.chat,并想知道是否导致问题？

缩小问题的范围：消息的触发次数=客户端的连接顺序.也就是说,如果客户端连接第二个,他的消息将触发两次.连接第三个的客户三次.

这是代码片段：

exports.chat = function(io,pseudoArray,req,res){
    res.render('chat',{title: 'ChatPanel.'});

        var users = 0; 

        io.sockets.on('connection',function (socket) { // First connection
            users += 1; 
        //  reloadUsers(io,users); 

            socket.on('message',function (data) { // Broadcast the message to all
                if(pseudoSet(socket)) {
                    var transmit = {date : new Date().toISOString(),pseudo : returnPseudo(socket),message : data};
                    socket.broadcast.emit('message',transmit);
                    console.log("user "+ transmit['pseudo'] +" said \""+data+"\"");
                }
            });

            socket.set('pseudo',req.session.user,function(){
                pseudoArray.push(req.session.user);
                socket.emit('pseudoStatus','ok');
                console.log("user " + req.session.user + " connected");
            });

            socket.on('disconnect',function () { // Disconnection of the client
                users -= 1;
            //  reloadUsers();
                if (pseudoSet(socket)) {
                    var pseudo;
                    socket.get('pseudo',function(err,name) {
                        pseudo = name;
                    });
                    var index = pseudoArray.indexOf(pseudo);
                    pseudo.slice(index - 1,1);
                }
            });
        });
};