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Let s Enjoy Node.js
The document discusses the capabilities and features of Node.js, emphasizing its use in server-side development with JavaScript. It provides code examples for creating a simple HTTP server, supporting multiple connections, and integrating with MongoDB. Additionally, it highlights community resources in Taiwan and encourages JavaScript developers to explore back-end programming with Node.js.
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Let s Enjoy Node.js
- 1. Let's Enjoy Node.js All in JavaScript Fred Chien
- 2. Enjoy Trip With2 Rules 旅程將啟，兩點規則
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- 4. 2 DO NOT KICKMY ASS! 請你的朋友不要打我的頭！
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- 6. WHO AM I? 我是誰？
- 7. Fred Chien 錢逢祥 永遠的大四生
- 8. Fred Chien 錢逢祥 永遠的大四生
- 9. Fred Chien 錢逢祥 宅宅水電工
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- 11. fred-zone.blogspot.com cfsghost@ gmail.com
- 12. JavaScript 大調查
- 13. Web 開發者共同的迷思 底層難！Porting難！神人！大牛！
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- 15. JavaScript Is NOT Browser-sideLanguage Anymore 是否不再只是瀏覽器端語言？
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- 17. Run JavaScript withoutBrowser 不需要瀏覽器的 JavaScript
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- 24. Enjoy JavaScript Enjoy It
- 25. Server-side Development 開發後端應用
- 26. PHP/Perl/Python/JSP/ASP... 開發後端應用
- 27. System Development 開發系統程式
- 28. Services/Daemon/Syscall...etc 控制作業系統的一切
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- 30. All Development 開發一切應用
- 31. About node.js ● Stableversion is 0.6.15 ● Support platforms: ○ MS Windows ○ Mac OS X ○ Linux ○ FreeBSD
- 32. node.js Features ● Basedon V8 JavaScript Engine (With JIT) ● Stand-alone (Without Web Browser) ● Event-driven ● Non-blocking I/O model
- 33. More Good ThingsCome ● Extending with C/C++ ● Support Multi-core Systems ● Provide Buffer Class ○ Solve 1.9GB heap limit of V8 ○ Nice to binary data
- 34. Great Performance onServer ● Thousands of Concurrent Connections ● Minimal Overhead (CPU/Memory) on a singal process
- 35. Hello World 快速試看看
- 36. Hello World! (helloworld.js) varhttp = require('http'); http.createServer(function(req, res) { res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('Hello Worldn'); }).listen(10000); console.log('Server running at http://localhost:10000/');
- 37. Run It! $ node./helloworld.js Server running at http://localhost:10000/
- 38. Cluster Support (cluster.js) varcluster = 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 worldn"); }).listen(8000); }
- 39. Run It! $ node./cluster.js Worker 18394 online Worker 18393 online
- 40. MongoDB Support (mongodb.js) varmongodb = 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); }); }); });
- 41. Run It! $ node./mongodb.js name: Fred Chien, email: cfsghost@gmail.com
- 42. Write a XMPPServer (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');
- 43. Run It! $ node./xmppsrv.js My XMPP Server was running at localhost:5222
- 44. Node.js Modules 你可以抓到更多的模組
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- 47. 8844+ Large Amount ofModule
- 48. Get Modules withNPM $ npm install mongodb $ npm install node-xmpp
- 49. References ● Node.js OfficialWebsite: http://nodejs.org/ ● NPM Official Website: http://npmjs.org/
- 50. Community in Taiwan ● Node.js Taiwan http://nodejs.tw/ ● Facebook Fans Page # NodeJS.tw ● Node.js Taiwan Party in Taipei Once Every other Thursday
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- 54. 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
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- 57. Question? 提問？
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