Let s Enjoy Node.js

Let's Enjoy Node.jsLet's Enjoy Node.jsAll in JavaScript

Fred Chien

Enjoy Trip With 2 Rules

旅程將啟，兩點規則

1Buckle Up!

請繫安全帶！

DO NOT KICK MY ASS!請你的朋友不要打我的頭！

2

說好不打臉的！說好喔！

WHO AM I ?

我是誰？

Fred Chien錢逢祥

永遠的大四生

Fred Chien錢逢祥

永遠的大四生

Fred Chien錢逢祥

宅宅水電工

慾火焚身的男人

fred-zone.blogspot.com

cfsghost @ gmail.com

JavaScript大調查

Web 開發者共同的迷思

底層難！Porting 難！神人！大牛！

共同的夢想JavaScript 成為海賊王！！！

JavaScriptIs NOT Browser-side Language Anymore

是否不再只是瀏覽器端語言？

橡膠果實使一切成為可能

Run JavaScript without Browser

不需要瀏覽器的 JavaScript

Old School JavaScript

Without Browser

With Node.js

More Third-party Modules

More Supports

換句話說In other words

Enjoy JavaScriptEnjoy It

Server-side Development

開發後端應用

PHP/Perl/Python/JSP/ASP...

開發後端應用

System Development

開發系統程式

Services/Daemon/Syscall...etc

控制作業系統的一切

更進一步Even More

All Development

開發一切應用

About node.js

● Stable version is 0.6.15● Support platforms:

○MS Windows○Mac OS X○Linux○FreeBSD

node.js Features

● Based on V8 JavaScript Engine (With JIT)

● Stand-alone (Without Web Browser)

● Event-driven

● Non-blocking I/O model

● Extending with C/C++

● Support Multi-core Systems

● Provide Buffer Class○ Solve 1.9GB heap limit of V8○ Nice to binary data

More Good Things Come

● Thousands of Concurrent Connections ● Minimal Overhead (CPU/Memory) on a

singal process

Great Performance on Server

Hello World快速試看看

Hello World! (helloworld.js)

var http = require('http');

http.createServer(function(req, res) { res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('Hello World\n');}).listen(10000);

console.log('Server running at http://localhost:10000/');

Run It!

$ node ./helloworld.jsServer running at http://localhost:10000/

Cluster Support (cluster.js)var cluster = require('cluster');var http = require('http');var numCPUs = require('os').cpus().length;

if (cluster.isMaster) { // Fork workers. for (var i = 0; i < numCPUs; i++) { cluster.fork(); }

cluster.on('death', function(worker) { console.log('worker ' + worker.pid + ' died'); });} else { // Worker processes have a http server. http.Server(function(req, res) { res.writeHead(200); res.end("hello world\n"); }).listen(8000);}

Run It!

$ node ./cluster.jsWorker 18394 onlineWorker 18393 online

MongoDB Support (mongodb.js)var mongodb = require('mongodb');var server = new mongodb.Server('localhost', 27017);var db = new mongodb.Db('mydb', server);

/* open db */db.open(function() {

/* Select 'contact' collection */ db.collection('contact', function(err, collection) {

/* Querying (name == 'Fred Chien') */ collection.find({ name: 'Fred Chien' }, function(err, data) { console.log('Name: ' + data.name + ', email: ' + data.email); });

});

});

Run It!

$ node ./mongodb.jsname: Fred Chien, email: [email protected]

Write a XMPP Server (xmppsrv.js)var xmpp = require('node-xmpp');

var c2s = new xmpp.C2S({ port: 5222, domain: 'example.com'});

c2s.on("authenticate", function(jid, password, client) { if (password == "12345678") { client.emit("auth-success", jid); } else { client.emit("auth-fail", jid); }});

console.log('My XMPP Server was running at localhost:5222');

Run It!

$ node ./xmppsrv.jsMy XMPP Server was running at localhost:5222

Node.js Modules你可以抓到更多的模組

NPMNode Package Manager

8844+Large Amount of Module

Get Modules with NPM

$ npm install mongodb$ npm install node-xmpp

References

●Node.js Official Website:http://nodejs.org/

●NPM Official Website:http://npmjs.org/

Community in Taiwan

● Node.js Taiwanhttp://nodejs.tw/

● Facebook Fans Page# NodeJS.tw

● Node.js Taiwan Party in TaipeiOnce Every other Thursday

總結來說...Anyway...

前端開發者走入後端

一種語言前後都可玩

Web開發者

將實現夢想

寫系統程式啦

低階程式讓專業的來

用 Node.js C/C++ Addon 打通硬體和系統的任督二脈

JSer 只要專心惡搞

仍然不需要管底層的事

大秘寶就是我們的！

我是海賊王！

Question?提問？

Thanks感謝您的耐心耹聽

Technology

Let s Enjoy Node.js