JavaScript as a Server side language (NodeJS): JSConf 2011, Dhaka
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This document provides an overview of NodeJS and ExpressJS. It discusses NodeJS as a server-side JavaScript platform and how its asynchronous and event-driven model provides benefits over traditional synchronous approaches. ExpressJS is introduced as a popular web framework built on NodeJS that provides routing, templating and other features to build web applications. The document demonstrates basic usage of NodeJS and ExpressJS.
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JavaScript as a Server side language (NodeJS): JSConf 2011, Dhaka
- 1. NodeJS JS as a Server-side Language Iraj Islam @irajislam Nurul Ferdous @ferdous NewsCred Saturday, September 17, 2011
- 2. Agenda NewsCred • Part 1. NodeJS • Part 2. ExpressJS • Questions? Saturday, September 17, 2011
- 3. Who We Are NewsCred Iraj Islam CTO/Co-founder, NewsCred Nurul Ferdous Senior Software Engineer, NewsCred Saturday, September 17, 2011
- 4. Part 1 NodeJS NewsCred Saturday, September 17, 2011
- 5. Server-side JS NewsCred Saturday, September 17, 2011
- 6. What’s NodeJS? NewsCred NodeJS What’s this all about? Saturday, September 17, 2011
- 7. What’s NodeJS? NewsCred NodeJS Evented I/O for V8 JavaScript. Saturday, September 17, 2011
- 8. What’s NodeJS? NewsCred Goal “Provide an easy way to build scalable network programs.” Saturday, September 17, 2011
- 9. History NewsCred The Evolution of the Web From static pages to real time data. Saturday, September 17, 2011
- 10. Why NodeJS? NewsCred The Age of Big Data Exabytes (1018) of data stored per year 1000 750 500 250 2006 2007 2008 0 2009 2010 Saturday, September 17, 2011
- 11. Why NodeJS? NewsCred The Fast Food Analogy Synchronous vs. Asynchronous Saturday, September 17, 2011
- 12. Why NodeJS? NewsCred The Apache Solution Synchronous I/O Application File User readFile(); System getTweets(); Twitter API writeToDb(); MySQL Saturday, September 17, 2011
- 13. Why NodeJS? NewsCred The Apache Solution Blocking I/O Application File User readFile(); System Waiting... getTweets(); Twitter API Waiting... writeToDb(); MySQL Saturday, September 17, 2011
- 14. Why NodeJS? NewsCred The NodeJS Solution Asynchronous I/O Application File User readFile(); System getTweets(); Twitter API writeToDb(); MySQL Saturday, September 17, 2011
- 15. Why NodeJS? NewsCred The NodeJS Solution Non-blocking I/O Application File User readFile(); System getTweets(); Twitter API writeToDb(); MySQL Saturday, September 17, 2011
- 16. NodeJS Benefits NewsCred • Fast • Built on top of Google’s V8 JavaScript engine. • Scalable • Asynchronous, event-driven I/O model yields web scale. • Programmable • JavaScript API and pluggable module architecture. Saturday, September 17, 2011
- 17. NodeJS Use Cases NewsCred • Serving APIs • Serving real-time apps • Serving web apps • Streaming data Saturday, September 17, 2011
- 18. NodeJS “Hello World!” NewsCred var http = require('http'); http.createServer(function (request, response) { response.writeHead(200, {'Content-Type': 'text/plain'}); response.writeHead('Hello World!'); }).listen(1337, '127.0.0.1'); Saturday, September 17, 2011
- 19. Who’s Using NodeJS? NewsCred Saturday, September 17, 2011
- 20. Installing NodeJS NewsCred • Installing on Unix • Installing on Windows • Run http://nodejs.org/dist/v0.5.6/node.exe Saturday, September 17, 2011
- 21. Installing npm NewsCred • Node Package Manager (npm) • One line install: • curl http://npmjs.org/install.sh | sudo sh • Multi-line install: • Get the code from http://github.com/isaacs/npm • Do what the REAMME says Saturday, September 17, 2011
- 22. Part 2 ExpressJS NewsCred Saturday, September 17, 2011
- 23. What’s ExpressJS? NewsCred ExpressJS High-performance NodeJS web framework. Saturday, September 17, 2011
- 24. Why ExpressJS? NewsCred • Full blown feature set • Routing • View rendering/templating • Sessions • Good documentation • Lots of examples • Many extensions Saturday, September 17, 2011
- 25. Installing ExpressJS NewsCred Saturday, September 17, 2011
- 26. Directory Structure NewsCred Saturday, September 17, 2011
- 27. Configuration NewsCred Saturday, September 17, 2011
- 28. Application Settings NewsCred Saturday, September 17, 2011
- 29. Routing NewsCred Saturday, September 17, 2011
- 30. View Rendering NewsCred • Haml templates • Haml • Jade • Embedded JavaScript (EJS) templates • Coffeekup templates • Uses CoffeeScript • jQuery templates Saturday, September 17, 2011
- 31. Views with Jade NewsCred Saturday, September 17, 2011
- 32. Sessions NewsCred • Currently cookie-based • Data store can be Redis, memory etc. Saturday, September 17, 2011
- 33. Packages NewsCred $ npm install -d # for installing dependancies Saturday, September 17, 2011
- 34. Resources NewsCred • NodeJS • http://nodejs.org • http://github.com/dynamicguy/node-mongo-cms • ExpressJS • http://expressjs.com • Sencha Connect • http://github.com/senchalabs/connect/wiki Saturday, September 17, 2011
- 35. Questions? NewsCred Iraj Islam iraj@newscred.com, @irajislam Nurul Ferdous nurul@newscred.com, @ferdous Saturday, September 17, 2011