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Introduction to NodeJS with LOLCats
- 1. Introduction to Node.JS By Derek Anderson
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- 3. What is Node.JS? EventedI/O for V8 JavaScript
- 4. What is Node.JS? EventedI/O for V8 JavaScript
- 5. What is Node.JS? EventedI/O for V8 JavaScript
- 6. Why? Node's goal isto provide an easy way to build scalable network programs. - nodejs.org
- 7. Traditional I/O var data= fs.readFile('large.mov'); // Wait until file.read finishes doSomethingWith(data); Waiting for disk operation to finish is slow!
- 8. Asynchronous I/O fs.readFile('large.mov', function(data){ doSomethingWith(data); }); // Do Something Else Right Away! doSomethingElse(); Read from the disk, and fire a callback when done. Meanwhile, Do Something Else! Inspiration: Felix Geisendörfer
- 9. THE GOOD • JavaScripton the Server
- 10. THE GOOD • JavaScripton the Server • Desktop / Web / CLI Applications
- 11. THE GOOD • JavaScripton the Server • Desktop / Web / CLI Applications • Non Blocking I/O: DB, Filesystems, etc
- 12. THE GOOD • JavaScripton the Server • Write CLI / GUI Applications • Non Blocking I/O: DB, Filesystems, etc • NPM : Node Package Manager
- 13. THE GOOD • JavaScripton the Server • Write CLI / GUI Applications • Non Blocking I/O: DB, Filesystems, etc • NPM : Node Package Manager • Active and friendly Community
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- 15. Installation Compile from Source https://github.com/joyent/node/wiki/Installation Install NPM $ curl http://npmjs.org/install.sh | sh
- 16. Hello World /hello-world.js console.log('Hello World'); $ node hello-world.js Hello World
- 17. Core Modules • HTTP/HTTPS- Rock on!
- 18. Core Modules • HTTP/HTTPS- Rock on! • TCP - That’s nifty...
- 19. Core Modules • HTTP/HTTPS- Rock on! • TCP - That’s nifty... • DNS - Perform DNS operations
- 20. Core Modules • HTTP/HTTPS- Rock on! • TCP - That’s nifty... • DNS - Perform DNS operations • Filesystems - read/write/watch !!
- 21. Core Modules • HTTP/HTTPS- Rock on! • TCP - That’s nifty... • DNS - Perform DNS operations • Filesystems - read/write/watch !! • Crypto, SSL/TLS, Readline, etc...
- 22. Core Modules • HTTP/HTTPS - Rock on! • TCP - That’s nifty... • DNS - Perform DNS operations • Filesystems - read/write/watch !! • Crypto, SSL/TLS, Readline, etc... Over 3,400 Community Modules and counting ! http://search.npmjs.org/
- 23. Modules var fs =require('fs'), sys = require('sys'), http = require('http'), foo = require('./lib/foo'), bar = require('./lib/bar'); Import system wide modules such as fs, sys, http or local modules like /lib/foo.js
- 24. Roll Your OwnModules lib/say.js exports.say = function(something){ return something; } server.js var baz = require('./lib/say'); console.log(baz.say('Foo Bar!')); $ node server.js Foo Bar!
- 25. HTTP Server If youwant to make an HTTP Server, you must first create the universe. - Carl Sagan
- 26. HTTP Server /hello-http.js var http = require('http') http.createServer(function(req, res){ res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('Hello World!'); }).listen(3000); console.log('Hello World'); $ node hello-http.js Server Running
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- 29. Resources & Tutorials List of Resources from Joyent https://github.com/joyent/node/wiki/Resources Node.js Beginners Guide http://nodeguide.com/beginner.html Read the API http://nodejs.org/docs/latest/api/
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- 31. Questions ?http://github.com/mediaupstream email: derek@mediaupstream.com twitter: @derekanderson