socket.io：disconnect事件不会被触发 [英] socket.io: disconnect event isn't fired

问题描述

您可以从这个存储库。

发生什么事情是断开连接事件（即使在浏览器关闭后）在服务器上也不会被触发。

server.js是：

 （function（）{
 var app，count，express，io; 
 
 express = require（'express'）; 
 io = require（'socket.io'）; 
 
 app = module.exports = express.createServer（）; 
 
 app.configure（function（）{
 app.set（'views'，__dirname +'/ views'）; 
 app.set（'view engine'，'jade'）; 
 app.use（express.bodyParser（））; 
 app.use（express.methodOverride（））; 
 app.use（require（'stylus'）。middleware（{
 src：__dirname +'/ public'
}））; 
 app.use（app.router）; 
 return app.use（express.static（__ dirname +'/ public'））; 
}）; 
 
 app.configure（'development'，function（）{
 return app.use（express.errorHandler（{
 dumpExceptions：true，
 showStack：true 
}））; 
}）; 
 app.configure 'production'，function（）{
 return app.use（express.errorHandler（））; 
}）; 
 
 io = require（'socket.io'）。listen（app）; 
 
 count = 0; 
 
 io.sockets.on（'connection'，function（socket）{
 count ++; 
 io.sockets.emit（'count'，{
 number： count 
}）; 
}）; 
 
 io.sockets.on（'disconnect'，function（）{
 console.log（'DISCONNESSO !!!'）; 
 count--; 
 io.sockets.emit（'count'，{
 number：count 
}）; 
}）; 
 
 
 app.get（'/'，function（req，res）{
 return res.render（'index'，{
 title：'node js express socket.io counter'
}）; 
}）; 
 if（！module.parent）{
 app.listen（10927）; 
 console.log（Express server listen on port％d，app.address（）。port）; 
} 
 
}）。call（this）; 
  

客户端的脚本是：

  script（type ='text / javascript'）
 
 var socket = io.connect（）; 
 
 socket.on（'count'，function（data）{
 $（'＃count'）。html（data.number）; 
}）; 
  

解决方案

将您的断开代码放在连接块上，编辑它有点像这样：

  io.sockets.on（'connection'，function（socket）{
 count ++; 
 io.sockets.emit（'count'，{
 number：count 
}）; 
 
 socket.on（'disconnect'，function（） {
 console.log（'DISCONNESSO !!!'）; 
 count--; 
 io.sockets.emit（'count'，{
 number：count 
}）; 
}）; 
}）; 
  

这样你就可以检测一个特定的套接字（特别是你传递给你的匿名函数的套接字连接运行）断开连接。

I have made a simple realtime visitor counter.

You can download it from this repository.

What happens is that disconnect event (even after browser closing) on server is never fired.

server.js is:

(function () {
var app, count, express, io;

express = require('express');
io = require('socket.io');

app = module.exports = express.createServer();

app.configure(function () {
    app.set('views', __dirname + '/views');
    app.set('view engine', 'jade');
    app.use(express.bodyParser());
    app.use(express.methodOverride());
    app.use(require('stylus').middleware({
        src: __dirname + '/public'
    }));
    app.use(app.router);
    return app.use(express.static(__dirname + '/public'));
});

app.configure('development', function () {
    return app.use(express.errorHandler({
        dumpExceptions: true,
        showStack: true
    }));
});
app.configure('production', function () {
    return app.use(express.errorHandler());
});

io = require('socket.io').listen(app);

count = 0;

io.sockets.on('connection', function (socket) {
    count++;
    io.sockets.emit('count', {
        number: count
    });
});

io.sockets.on('disconnect', function () {
    console.log('DISCONNESSO!!! ');
    count--;
    io.sockets.emit('count', {
        number: count
    });
});


app.get('/', function (req, res) {
    return res.render('index', {
        title: 'node.js express socket.io counter'
    });
});
if (!module.parent) {
    app.listen(10927);
    console.log("Express server listening on port %d", app.address().port);
}

}).call(this);

Script on the client is:

    script(type='text/javascript')

        var socket = io.connect();

        socket.on('count', function (data) {
            $('#count').html( data.number );
        });

解决方案

Put your on disconnect code inside your on connect block and edit it a bit like so:

io.sockets.on('connection', function (socket) {
    count++;
    io.sockets.emit('count', {
        number: count
    });

    socket.on('disconnect', function () {
        console.log('DISCONNESSO!!! ');
        count--;
        io.sockets.emit('count', {
            number: count
        });
    });
});

This way you're detecting when a specific socket (specifically the socket you pass to your anonymous function that is run on connection) is disconnected.

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