nodejs实现简单消息推送

server1.js

var http = require('http');
var express = require('express');
var sio = require('socket.io');
var app = express();
app.use(express.static(__dirname + '/'));
var server = http.createServer(app);
server.listen(3001, '127.0.0.1');
var io = sio.listen(server);
var users = [];
io.sockets.on('connection', function(socket) {
    console.log('a socket is connect, id: ' + socket.id);
    io.sockets.emit('conn', socket.id);
});
setInterval(function() {
    console.log('推送消息');
    io.sockets.emit('conn', '推送消息');
}, 1000);

client1.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script type="text/javascript" src="socket.io.js"></script>
<script type="text/javascript">
window.onload = function() {
    var socket = io.connect('http://127.0.0.1:3001');
    socket.on('connect', function() {
        socket.on('conn', function(id) {
            document.getElementById('div1').innerHTML += id + '<br>';
        });
    });
}
</script>
</head>
<body>
<div id="div1"></div>
</body>
</html>

server2.js

var http = require('http');
var sio = require('socket.io');
var server = http.createServer();
server.listen(3002, '127.0.0.1');
var io = sio.listen(server);
console.log('简单消息推送服务器运行...');
setInterval(function() {
    io.sockets.emit('conn', '推送内容');
}, 1000);

client2.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script type="text/javascript" src="socket.io.js"></script>
<head>
<body>
<div id="div1"></div>
<script>
window.onload = init();
function init() {
    var socket = io.connect('http://127.0.0.1:3002');
    socket.on('conn', function(msg) {
        document.getElementById('div1').innerHTML += msg + '<br>';
    });
}
</script>
</body>
</html>

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原文地址：https://www.cnblogs.com/feilv/p/4180357.html