Socket.io客户端无法正确接收来自服务器的数据

时间:2013-03-13 02:27:06

标签: javascript html5 node.js networking socket.io

server.js

var app = require('http').createServer(handler)
  , io = require('socket.io').listen(app)
  , fs = require('fs')

app.listen(process.env.PORT);

function handler (req, res) {
  fs.readFile(__dirname + '/index.html',
  function (err, data) {
    if (err) {
      res.writeHead(500);
      return res.end('Error loading index.html');
    }

    res.writeHead(200);
    res.end(data);
  });
}

io.sockets.on('connection', function (socket) {
  socket.emit('message', { msg: 'world' });
  socket.on('message', function (msg) {
    console.log(msg);
    console.log('That was a message from the client :)');
  });
});

的index.html:

<script src="/socket.io/socket.io.js"></script>
<script>
  var socket = io.connect('EDITED');
  document.write("test");
  socket.on('message', function (msg) {
    alert(msg);
    //console.log(data);
    socket.emit('message', { msg: 'hello there server' });
  });
</script>

服务器正在接受消息“hello there server”并在控制台中正确显示它;但是,当服务器向客户端发送消息“hello”时,客户端应该发出一个应该显示为“hello”的弹出警报。而不是弹出警报说“你好”,它说: [object Object]

有什么想法吗?

1 个答案:

答案 0 :(得分:1)

响应是一个对象:

socket.on('message', function(data) {
    alert(data.msg);

在发送此类调试消息时,我考虑使用console.log,因为您可以看到结构而不只是[object Object]