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我几乎完成了我的socket.io实现示例。 唯一缺少的是断开连接事件的功能。Socket.io断开连接功能不起作用
我试图把它放在io连接功能里面,一切都浮现在我的脑海里。 可悲的是,断开功能并没有被触发。
其中包含我的继承人路由文件的代码表示函数:
/* GET /backend */
router.get('/', function(req, res, next) {
if (req.session && req.session.user) { // Check if session exists
var currentUser = req.session.user[0].name; // save username according to session
if(!req.session.user[0].io){
req.app.get('io').on('connection', function(socket){ // Gets executed when user connects to /backend/
req.session.user[0].io = true; // Sets the io session to true
console.log("IO SESSION SET : "+ req.session.user[0].io +" for user " + currentUser);
});
if(req.session.user[0].io){
req.app.get('io').on('disconnect', function(){
req.session.user[0].io = false;
console.log("IO SESSION SET : "+ req.session.user[0].io +" for user " + currentUser);
req.app.get('io').emit('wentOffline', currentUser); // emit wentOffline to client js
});
}
req.app.get('io').emit('cameOnline', currentUser); // emit function cameOnline to client js
}
// res.render('backend', { title: 'Backend' });
// console.log(req.session.user[0].name);
/*
-------------------------
#########################
IF EVERYTHING FAILS - THE CODE BELOW IS THE NORMAL RENDER WITHOUT SOCKET IO
#########################
-------------------------
*/
// lookup the user in the DB by pulling their email from the session
User.getUser({ name: req.session.user.name }, function (err, user) {
if (!user) {
console.log("No User found");
// if the user isn't found in the DB, reset the session info and
// redirect the user to the login page
// console.log(user);
req.session.reset();
res.redirect('/login');
} else {
// expose the user to the template
res.locals.user = user;
// render the dashboard page
function passOnlineUsers(callback){ // Looks for All users who are online
User.getOnlineUsers({}, function(err, res, fields){
// console.log(res);
if (err) throw err;
callback(err, res);
});
}
passOnlineUsers(function(err, result){
res.render('backend', { title: 'Backend', viewer: req.session.user[0], online: result });
// res.render('backend', { title: 'Backend', viewer: "", online: result });
});
}
});
} else {
res.redirect('/login');
}
});
,如果它在这里需要的是还加载客户端文件与IO码:除了断开功能
<script>
var socket = io();
// socket.emit('cameOnline', "new User");
socket.on('cameOnline', function(name){
console.log(name + " connected.");
var $li = $('<li/>');
$li.addClass(name);
if($('#onlineUsers .'+name).length == 0){
console.log(name + " is about to be added");
$li.text(" "+ name);
$('#onlineUsers').append($li);
}else{
console.log("no new user");
}
// $('#onlineUsers').append($("<span>").text(" " + name)).addClass(name);
});
socket.on('wentOffline', function(name){
console.log(name +" is about to go offline");
var toDel = $('#onlineUsers li.'+name);
toDel.remove();
});
</script>
一切工作正常。 当用户上线时,cameOnline函数被激发并将用户添加到后端列表中。
虽然用户断开连接 - 没有任何反应。
任何想法? oO
感谢。当我在连接函数中使用.emit函数时,我遇到了一个问题,就是它们在pagerefresh上加倍了自己。emit函数似乎在io连接之外很好地工作,我在io连接中有断开连接的功能,但是它也没有工作。 –