如何在socket.io node.js上以两种方式同时通信

Question

当某些事件触发时，我想向node.js服务器发送一些数据。同时，服务器应该每1秒向客户端发送一些数据。为此，我使用了socket.io。下面是我的代码:服务器端：

app= require('http').createServer(handler).listen(3000),
io = require('socket.io').listen(app);

// request handler function, will send client file which include sliders and graph    
function handler (req, res) {    
var reqObj = urr.parse(req.url, true);
var reqPath = reqObj.pathname;
if ('/' == reqPath ) {
res.writeHead(200, {'Content-Type': 'text/html'});
fs.readFile(__dirname + '/client.html', function(err, data) {
if (err) {         
res.writeHead(500);
return     
res.end('Errorloadingclient.html');    }
res.end(data);
});    }    };

var slider1, slider2, slider3, slider4 ;
io.sockets.on('connection', function(socket) {

// receive changed value of slider send by client
socket.on('ValSlider1', function(data){
slider1 = data ;
console.log("Slider 1 Value: " + data);    });
// same for three more sliders    });
// send received values back to client after every 1 second interval

setInterval(function () {
var data = slider1 + "-" + slider2 + "-" + slider3 + "-"    + slider4; 
socket.emit('packet', data);
},1000);    });    
app.maxConnections = 1;

客户端：

<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="/socket.io/socket.io.js"></script>
<script type="text/javascript"
src="http://smoothiecharts.org/smoothie.js"></script>

// slider 
<p id="ValSlider1"> Curr Val </p>
<input class = "mySlider1" type="range" name="slider" id="slider-0" value="0"     min="0"     max="100" />

//类似于另外三个滑块数据包

var socket = io.connect('http://localhost');

// send changed value to server
$(".mySlider1").change(function() {
var sVal = $(this).val();
socket.emit('ValSlider1', sVal);
});

//类似于另外三个滑块

socket.on('packet', function (data) {
var valFromServer = data.split('-');
document.getElementById("ValSlider1").innerHTML =   valFromServer[0];
});

</script>

现在，只有在客户机中两次使用'socket.emit()‘时，服务器端才能获得数据，其中服务器以1秒的间隔发送数据。

Answer 1

最后，我设法这样做，在服务器端。

app= require('http').createServer(handler).listen(3000),
io = require('socket.io').listen(3001);
publisher = require('socket.io').listen(app); 

在客户端

var socket = io.connect('http://localhost:3001');
var socket2 = io.connect('http://localhost');

客户端将在“套接字”上向服务器发送数据，响应服务器也将在同一端口上发送一些数据。同时，服务器将在3001端口上发布server1的“server1(‘data’)”事件中每1秒一次在客户端接收的数据。