AGENDA

TRADITIONAL WEB SERVER

Uses threads to handle incoming requests

NODE.JS

Uses single non-blocking thread with an event loop

• eBay
  
• Yahoo
  
• Linkdin
  
• Microsoft
  
• Walmart
  
• Yammer
  
• Voxer
  
• ....
  

• Non-Blocking I/O (FAST !)
  
• Highly efficient scalability 
  
• Google's V8-JS Engine (FAST!)
  
• 15,000+ Modules (..and counting..)
  
• Active Community ( IRC, Mailing List, Twitter, Git)
  
• Cross Platform (Mac, Linux, Windows)
  
• Javascript: 1 Language for Frontend and Backend
  
• JSON friendly (Client, Server, Database)
  

$ npm install <packagename>i.e $ npm install express 

{
  "name": "hello-node",
  "description": "hello world",
  "version": "0.0.1",
  "dependencies": {
    "express": "3.x"
  }
}

$ npm install

• Inspired by Sinatra (Ruby)
  
• Fast, un-opinionated, minimalist web framework for node
  
• template engine support (Jade, EJS)
  
• CSS engine support (SASS,LESS,Stylus)
  
• Asynchronous
• Based On Connect Middleware
• Implements MVC

    INSTALLATION

$ node install express -g
Generating a Basic App
$ express myapp$ cd myapp && npm install$ node myapp

var http = require("http");
http.createServer(function(req, res){
   res.writeHead(200, {"Content-Type": "text/plain"});
   return res.end("Hello Node Developer!\n");
}).listen(8080);
console.log("Server running at port 8080");