Brought to you by coloradosprings.js Presented by Brian Parks Who - - PowerPoint PPT Presentation

Brought to you by coloradosprings.js
 Presented by Brian Parks

Who am I?

• Brian Parks
• Founder and CEO of

Synapse Software (synapsesoftware.com)

• From C to PHP and .NET
• Javascript is awesome!
• http://slidesha.re/1jCKMMD

What is node.js?

• “Evented [non-blocking] I/O for V8 Javascript”
• Node.js is a platform built on Chrome's JavaScript

runtime for easily building fast, scalable network

• applications. Node.js uses an event-driven, non-

blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.

• https://www.youtube.com/watch?v=jo_B4LTHi3I

Why use node.js

• High throughput
• Real-time collaboration
• Horizontal scalability
• Evented model
• Javascript for web, network, console
• Node Package Manager

Where do I get it?

• Homebrew package manager (Mac OS X)
• Github (All platforms)
• http://nodejs.org/download/

Non-blocking

• PHP

echo “hello”;
 sleep(2);
 echo “world”;

• node.js

setTimeout(function() { console.log(“world”); }, 2000); console.log(“hello”);

A quick example

var net = require('net');

• var server = net.createServer(function

(socket) { socket.write('Echo server\r\n'); socket.pipe(socket); });

• server.listen(1337, '127.0.0.1');

In the real world

• Verimail - small service that responds whether

the server running it is authorized to send mail for a given email address

• https://github.com/bparks/verimail

A more realistic example

var http = require('http');

• http.createServer(function (req, res) {

res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('Hello World\n'); }).listen(1337, '127.0.0.1');

• console.log('Server running at http://

127.0.0.1:1337/');

• Run with

telnet localhost 1337 > GET / >

• Notice the “Content-Encoding: chunked” response header

Using chunking

var http = require('http');

• http.createServer(function (req, res) {

res.writeHead(200, {'Content-Type': 'text/plain; charset=UTF-8'}); res.write('Hello\r\n'); setTimeout(function () { res.end('World\r\n'); }, 2000); }).listen(1337, '127.0.0.1');

• console.log('Server running at http://127.0.0.1:1337/');
• Run with

telnet localhost 1337 > GET / >

In the real world

• Etherpad - Really real-time collaborative

document editing for the rest of us (http:// etherpad.org)

• https://github.com/ether/etherpad-lite

Goggles

• http://goggles.sneakygcr.net
• A full-fledged node.js app written when node.js

was very new.

• Most of Goggles is open source at https://

github.com/gcr/goggles

• Highly-collaborative, real-time

Other node.js stuff

• express.js
• npm (node package manager)
• Code in this presentation will also be uploaded to

github: https://github.com/bparks/node-demo

• To get the code:

git clone https://github.com/bparks/ node-demo.git git submodule init git submodule update