socket.emit 和 socket.on 在 node.js 中不起作用
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/17663589/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
socket.emit and socket.on do not work in node.js
提问by Hsm Sharique Hasan
I tried to connect my chrome browser to NodeJs Server. All the code works great on other machine. but when i run it on my machine neither it gives an error nor it gives a success. here is the code
我试图将我的 chrome 浏览器连接到 NodeJs 服务器。所有代码在其他机器上运行良好。但是当我在我的机器上运行它时，它既不出错也不成功。这是代码
Server Code:
服务器代码：
var server = http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
var io = require('socket.io').listen(server);
io.sockets.on('message', function (socket) {
socket.emit('news', { hello: 'world' });
});
and Here is the Client Code.
这是客户代码。
<script>
var socket = io.connect('http://localhost:3000/');
//console.log(socket);
socket.on("message",function(data){
console.log(data);
})
</script>
Kindly correct me where I am doing it wrong. console.log() in client doesnot work. I tried to check it in chrome debugger using breakpoints but it never goes to that point.
请纠正我做错的地方。客户端中的 console.log() 不起作用。我尝试使用断点在 chrome 调试器中检查它，但它永远不会到达那个点。
回答by leko
You are missing some code:
您缺少一些代码：
io.sockets.on('connection', function (socket) {
socket.on('message', function (data) {
socket.emit('news', { hello: 'world' });
});
socket.on('another-message', function (data) {
socket.emit('not-news', { hello: 'world' });
});
});
Taken from socket IOwebsite. For this to work you need to start by sending a 'message' from the client, something in the lines of:
取自套接字 IO网站。为此，您需要首先从客户端发送“消息”，内容如下：
<script>
var socket = io.connect('http://localhost:3000/');
socket.on('connect',function(){
socket.emit('message', 'Hello server');
});
socket.on('news', function(msg) {
alert('News from server: ' + msg.hello);
});
</script>
