Question

我使用node.js + socket.io创建了简单的聊天应用程序。当我尝试运行它时，它没有按预期运行：它不断地从客户端发送请求。我已在（客户端/服务器端）端配置了传输设置：['jsonp-polling', 'xhr-polling']。我尝试设置['close timeout': 10]，但这并没有改变任何东西。我不明白这里发生了什么。

我认为我的连接中断了，正如我在日志文件中看到的那样（最后）。

以下是我的代码：

服务器端：app.js ~~~~~~~~~~~~~~~~~~~~

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

io.configure(function () {
    io.enable('browser client minification'); 
    io.enable('browser client etag');         
    io.enable('browser client gzip');         
    io.set('log level', 3);
});

io.on('connection', function (client) {
    client.on('message', function (msg) {
        socket.broadcast(msg);
    });
    client.on('disconnect', function () {
    });
});

客户端：index.html ~~~~~~~~~~~~~~~~~~~~~~~~

<!DOCTYPE html>
<html>
    <head>
        <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>
        <script src="http://cdn.socket.io/stable/socket.io.js"></script>
        <script>
            $(document).ready(function () {
                var socket = new io.Socket("localhost", {port: 8080});

                socket.on('connect', function () {
                    socket.send('A client connected.');
                });
                socket.on('message', function (message) {
                    $('div#messages').append($('<p>'), message);
                });
                socket.on('disconnect', function () {
                    console.log('disconnected');
                });
                socket.connect();

                $('input').keydown(function (event) {
                    if(event.keyCode === 13) {
                        socket.send($('input').val());
                        $('input').val('');
                    }
                });
            });
        </script>
    </head>
    <body>
        <input type="text" style="width: 300px;" />
        <div id="messages" style="border:solid 1px #000;">&nbsp;</div>
    </body>
</html>

这是日志文件：

debug: client authorized
info: handshake authorized U1Y79P8WLaMz_UWoiKTc
debug: setting request GET /socket.io/1/xhr-polling/U1Y79P8WLaMz_UWoiKTc?t=1345273505128
debug: setting poll timeout
debug: client authorized for 
debug: clearing poll timeout
debug: xhr-polling writing 1::
debug: set close timeout for client U1Y79P8WLaMz_UWoiKTc
debug: setting request GET /socket.io/1/xhr-polling/U1Y79P8WLaMz_UWoiKTc?t=1345273505194
debug: setting poll timeout
debug: discarding transport
debug: cleared close timeout for client U1Y79P8WLaMz_UWoiKTc
debug: setting request GET /socket.io/1/xhr-polling/ufw4UqC2pCvWqqB5iKOQ?t=1345273505438
debug: setting poll timeout
debug: clearing poll timeout
debug: xhr-polling writing 7:::1+0
debug: set close timeout for client ufw4UqC2pCvWqqB5iKOQ
warn: client not handshaken client should reconnect
info: transport end (error)
debug: cleared close timeout for client ufw4UqC2pCvWqqB5iKOQ
debug: discarding transport
debug: client authorized
info: handshake authorized Uslh5g1YKNE8rCJDiKTd
debug: client authorized
info: handshake authorized -XHkL7Zk9KzA7WEFiKTe
debug: client authorized
info: handshake authorized _OOsM2nZOVgS93R-iKTf
debug: client authorized
info: handshake authorized IZ0vUej2iX_-TRSJiKTg
debug: setting request GET /socket.io/1/xhr-polling/IZ0vUej2iX_-TRSJiKTg?t=1345273505717
debug: setting poll timeout
debug: client authorized for 
debug: clearing poll timeout
debug: xhr-polling writing 1::
debug: set close timeout for client IZ0vUej2iX_-TRSJiKTg

有人可以建议如何调试此问题或问题究竟是什么？

Answer 1

io.on('connection', function (client) {

应为io.sockets.on(...

client.on('message', function (msg) {
    socket.broadcast(msg);

应client.broadcast(msg);（socket未在任何地方定义）

Answer 2

您可以根据需要配置socket.io设置。 https://github.com/LearnBoost/Socket.IO/wiki/Configuring-Socket.IO

我也遇到了同样的问题，发现添加以下行解决了问题

io.set('transports',['xhr-polling']);

socket.io与node.js无法按预期工作

2 个答案: