JavaScript as a Server side language (NodeJS): JSConf 2011, Dhaka
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NodeJSJS as a Server-side Language
NewsCred
Iraj Islam @irajislam
Nurul Ferdous @ferdous
Saturday, September 17, 2011
Agenda
• Part 1. NodeJS
• Part 2. ExpressJS
• Questions?
NewsCred
Saturday, September 17, 2011
Who We Are NewsCred
Iraj IslamCTO/Co-founder, NewsCred
Nurul FerdousSenior Software Engineer, NewsCred
Saturday, September 17, 2011
Part 1NodeJS
NewsCred
Saturday, September 17, 2011
Server-side JS NewsCred
Saturday, September 17, 2011
What’s NodeJS? NewsCred
NodeJSWhat’s this all about?
Saturday, September 17, 2011
What’s NodeJS? NewsCred
NodeJSEvented I/O for V8 JavaScript.
Saturday, September 17, 2011
What’s NodeJS? NewsCred
Goal“Provide an easy way to build scalable
network programs.”
Saturday, September 17, 2011
History NewsCred
The Evolution of the WebFrom static pages to real time data.
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Why NodeJS? NewsCred
The Age of Big DataExabytes (1018) of data stored per year
0
250
500
750
1000
20062007
20082009
2010
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Why NodeJS? NewsCred
The Fast Food AnalogySynchronous vs. Asynchronous
Saturday, September 17, 2011
Why NodeJS? NewsCred
The Apache SolutionSynchronous I/O
readFile();
Application
MySQL
User FileSystem
getTweets();
writeToDb();
Twitter API
Saturday, September 17, 2011
Why NodeJS? NewsCred
The Apache SolutionBlocking I/O
readFile();
Application
MySQL
User FileSystem
Waiting...
getTweets();
Waiting...
writeToDb();
Twitter API
Saturday, September 17, 2011
Why NodeJS? NewsCred
The NodeJS SolutionAsynchronous I/O
readFile();
Application
MySQL
User FileSystem
getTweets();
writeToDb();
Twitter API
Saturday, September 17, 2011
Why NodeJS? NewsCred
The NodeJS SolutionNon-blocking I/O
readFile();
Application
MySQL
User FileSystem
getTweets();
writeToDb();
Twitter API
Saturday, September 17, 2011
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
• Serving APIs
• Serving real-time apps
• Serving web apps
• Streaming data
NodeJS Use Cases NewsCred
Saturday, September 17, 2011
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
Who’s Using NodeJS? NewsCred
Saturday, September 17, 2011
Installing NodeJS NewsCred
• Installing on Unix
• Installing on Windows• Run http://nodejs.org/dist/v0.5.6/node.exe
Saturday, September 17, 2011
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
Part 2ExpressJS
NewsCred
Saturday, September 17, 2011
What’s ExpressJS? NewsCred
ExpressJSHigh-performance NodeJS
web framework.
Saturday, September 17, 2011
Why ExpressJS? NewsCred
• Full blown feature set• Routing
• View rendering/templating
• Sessions
• Good documentation• Lots of examples
• Many extensions
Saturday, September 17, 2011
Installing ExpressJS NewsCred
Saturday, September 17, 2011
Directory Structure NewsCred
Saturday, September 17, 2011
Configuration NewsCred
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Application Settings NewsCred
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Routing NewsCred
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View Rendering NewsCred
• Haml templates• Haml
• Jade
• Embedded JavaScript (EJS) templates
• Coffeekup templates• Uses CoffeeScript
• jQuery templates
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Views with Jade NewsCred
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Sessions NewsCred
• Currently cookie-based• Data store can be Redis, memory etc.
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Packages NewsCred
$ npm install -d # for installing dependancies
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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
Questions? NewsCred
Iraj Islamiraj@newscred.com, @irajislam
Nurul Ferdousnurul@newscred.com, @ferdous
Saturday, September 17, 2011
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