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?
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]
。