socket.io客户端没有从服务器接收消息 [英] socket.io client not receiving messages from server
问题描述
我正在尝试使用两个客户端实现一个系统，其中一个客户端发送一条消息而另一个客户端将接收该消息。
下图将以更直观的方式解释它：
I'm trying to implement a system with two clients one of them sends a message and the other one shall receive it. The figure below will explain it in a more visual way:
因此，客户端1将消息发送到服务器（这有效），服务器收到按下消息并发出应该由客户端2接收的弹出消息。
此处的问题是客户端2从未收到pop消息。 :(
So, the client 1 send the message to the server (and this works), the server receives a "push" message and emits a "pop" message that should be picked up by Client 2. The problem here is that Client 2 never receives the "pop" message. :(
以下是所有这些代码。
SERVER.JS
var app = require('express').createServer()
, io = require('socket.io').listen(app);
app.listen(999);
app.get('/webclient', function (req, res) {
res.sendfile(__dirname + '/web.html');
});
app.get('/mobile', function (req, res) {
res.sendfile(__dirname + '/mobile.html');
});
io.sockets.on('connection', function (socket) {
// socket.emit('pop', { hello: 'world' });
socket.on('push', function (data) {
console.log('push received, emitting a pop');
socket.emit('pop', { hello: 'world' });
});
});
客户1（又名mobile.html）
<html>
<head>
<title>
Mobile
</title>
<script src="/socket.io/socket.io.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/mootools/1.4.5/mootools-yui-compressed.js" type="text/javascript"></script>
<script>
var socket = io.connect('http://localhost:999');
</script>
</head>
<body>
<input type="button" name="act" id="push" value="message" />
<script type="text/javascript" charset="utf-8">
window.addEvent('domready', function() {
$('push').addEvent('click', function() {
socket.emit('push', { hello: 'world' });
});
});
</script>
</body>
</html>
客户2（又名web.html）
<script src = "/socket.io/socket.io.js"></script>
<script>
var socket = io.connect('http://localhost:999');
socket.on('pop', function (data) {
console.log(data);
});
</script>
我无法理解客户2没有收到pop消息的原因，
一般来说我对socket.io和node.js都很陌生，所以对我来说一些技巧仍然有点模糊，所以我提前为我的noobness道歉。 ：）
I just cannot understand the reason why Client 2 does not receive the "pop" message, I'm quite new to socket.io and node.js in general so some mechanics to me are still a bit obscure, so I apologize in advance for my noobness. :)
欢呼
-k-
推荐答案
为每个套接字调用传递给 .on 的函数来进行初始化（绑定事件等），并且 socket 指的是当前套接字。当您收到 push 消息时，这将是客户端1，因为处理函数绑定到 push 事件 socket - 在客户端1连接时绑定该函数（其中 socket 指客户端1）。
The function passed to .on is called for each socket to do the initialization (binding events etc), and socket refers to that current socket. This will be client 1 when you receive a push message, because the handler function is bound to the push event of that socket - you bound that function when client 1 connected (where socket refers to client 1).
io.sockets 是指连接的所有套接字，因此包括客户端2。
io.sockets refers to all sockets connected, so including client 2 in your case.
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