CentOS 7 配置JS语言开发环境（JavaScript）

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CentOS 7 配置JS语言开发环境（JavaScript）

安装ServerSide JavaScript环境“Node.js”

安装Node.js和包管理工具npm

[root@linuxprobe ~]# yum -y install epel-release[root@linuxprobe ~]# yum --enablerepo=epel -y install nodejs npm

创建一个测试工具

[root@linuxprobe ~]$ vi helloworld.jsvar 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[root@linuxprobe ~]$ node helloworld.js &# verify (it's OK if following reply is back )[root@linuxprobe ~]$ curl http://127.0.0.1:1337/Hello World

安装Socket.IO并使用WebSocket创建测试

[root@linuxprobe ~]$ npm install socket.io express[root@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');});[root@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>[root@linuxprobe ~]$ node chat.jslistening on *:1337

客户端浏览器访问测试http://10.1.1.53:1337/

安装ServerSide JavaScript环境Node.js 4（LTS）

可以从CentOS SCLo软件存贮库进行安装

# install from SCLo[root@linuxprobe ~]# yum --enablerepo=centos-sclo-rh -y install rh-nodejs4

设置环境变量

# load environment variables[root@linuxprobe ~]# scl enable rh-nodejs4 bash[root@linuxprobe ~]# node -vv4.4.2[root@linuxprobe ~]# which node/opt/rh/rh-nodejs4/root/usr/bin/node

设置登录时自动启用Node.js 4

[root@linuxprobe ~]# vi /etc/profile.d/rh-nodejs4.sh#!/bin/bashsource /opt/rh/rh-nodejs4/enableexport X_SCLS="`scl enable rh-nodejs4 'echo $X_SCLS'`"

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