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二、Node.js安装
[root@linuxprobe ~]# yum --enablerepo=epel -y install nodejs npm
[wang@linuxprobe ~]$ vi helloworld.js
var http = require('http');
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World\n');
}).listen(1337, '127.0.0.1');
console.log('listening on http://127.0.0.1:1337/');
# run server
[wang@linuxprobe ~]$ node helloworld.js &
[1] 12440
[wang@linuxprobe ~]$ listening on http://127.0.0.1:1337/
# verify (it's OK if following reply is back )
[wang@linuxprobe ~]$ curl http://127.0.0.1:1337/
Hello World
[wang@linuxprobe ~]$ npm install socket.io express
# 安装express会提示下图警告,经度娘了解,这个警告信息可以忽略,本文只介绍安装Node.js环境,对Node.js本身不做过多介绍,有兴趣的同学可以想办法解决这个WARN。
[wang@linuxprobe ~]$ vi chat.js
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.get('/', function(req, res){
res.sendFile(__dirname + '/index.html');
});
io.on('connection', function(socket){
socket.on('chat message', function(msg){
io.emit('chat message', msg);
});
});
http.listen(1337, function(){
console.log('listening on *:1337');
});
[wang@linuxprobe ~]$ vi index.html
<!DOCTYPE html>
<html>
<head>
<title>WebSocket Chat</title>
</head>
<body>
<form action="">
<input id="sendmsg" autocomplete="off" /><button>Send</button>
</form>
<ul id="messages" style="list-style-type: decimal; font-size: 16px; font-family: Arial;"></ul>
<script src="/socket.io/socket.io.js"></script>
<script src="http://code.jquery.com/jquery.min.js"></script>
<script>
var socket = io();
$('form').submit(function(){
socket.emit('chat message', $('#sendmsg').val());
$('#sendmsg').val('');
return false;
});
socket.on('chat message', function(msg){
$('#messages').append($('<li style="margin-bottom: 5px;">').text(msg));
});
</script>
</body>
</html>
[wang@linuxprobe ~]$ node chat.js
listening on *:1337
从客户端计算机访问“http://(服务器的主机名或IP地址):1337 /”,以确保示例应用程序正常工作
# 安装开发依赖包
[root@linuxprobe ~]# yum -y install gcc make gcc-c++ openssl-devel wget
# 下载源码及解压
[root@linuxprobe ~]# wget https://nodejs.org/dist/v6.2.0/node-v6.2.0-linux-x64.tar.gz -P /usr/local/src
[root@linuxprobe ~]# cd /usr/local/src && tar zxvf node-v6.2.0-linux-x64.tar.gz
# 编译安装
[root@linuxprobe src]# cd node-v6.2.0-linux-x64
# 编译安装是个坑,先不填,放着......