Book Image

Node Cookbook

By : David Mark Clements
Book Image

Node Cookbook

By: David Mark Clements

Overview of this book

The principles of asynchronous event-driven programming are perfect for today's web, where efficient real-time applications and scalability are at the forefront. Server-side JavaScript has been here since the 90's but Node got it right. With a thriving community and interest from Internet giants, it could be the PHP of tomorrow. "Node Cookbook" shows you how to transfer your JavaScript skills to server side programming. With simple examples and supporting code, "Node Cookbook" talks you through various server side scenarios often saving you time, effort, and trouble by demonstrating best practices and showing you how to avoid security faux pas. Beginning with making your own web server, the practical recipes in this cookbook are designed to smoothly progress you to making full web applications, command line applications, and Node modules. Node Cookbook takes you through interfacing with various database backends such as MySQL, MongoDB and Redis, working with web sockets, and interfacing with network protocols, such as SMTP. Additionally, there are recipes on correctly performing heavy computations, security implementations, writing, your own Node modules and different ways to take your apps live.

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Node Cookbook
David Mark Clements
Jul, 2012 | 342 pages
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Table of Contents (16 chapters)
Node Cookbook
Node Cookbook
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Making a Web Server
Making a Web Server
Introduction
Setting up a router
Serving static files
Caching content in memory for immediate delivery
Optimizing performance with streaming
Securing against filesystem hacking exploits
2
Exploring the HTTP Object
Exploring the HTTP Object
Introduction
Processing POST data
Handling file uploads
Using Node as an HTTP client
Implementing download throttling
3
Working with Data Serialization
Working with Data Serialization
Introduction
Converting an object to JSON and back again
Converting an object to XML and back again
Browser-server transmission via AJAX
Working with real data: fetching trending tweets
4
Interfacing with Databases
Interfacing with Databases
Introduction
Writing to a CSV file
Connecting and sending SQL to a MySQL server
Storing and retrieving data with MongoDB
Storing and retrieving data with Mongoskin
Storing data to CouchDB with Cradle
Retrieving data from CouchDB with Cradle
Accessing CouchDB changes stream with Cradle
Storing and retrieving data with Redis
Implementing PubSub with Redis
5
Transcending AJAX: Using WebSockets
Transcending AJAX: Using WebSockets
Introduction
Creating a WebSocket server
Seamless fallbacking with socket.io
Callbacks over socket.io transport
Creating a real-time widget
6
Accelerating Development with Express
Accelerating Development with Express
Introduction
Generating Express scaffolding
Defining and applying environments
Dynamic routing
Templating in Express
CSS engines with Express
Initializing and using a session
Making an Express web app
7
Implementing Security, Encryption, and Authentication
Implementing Security, Encryption, and Authentication
Introduction
Implementing Basic Authentication
Cryptographic password hashing
Implementing Digest Authentication
Setting up an HTTPS web server
Preventing cross-site request forgery
8
Integrating Network Paradigms
Integrating Network Paradigms
Introduction
Sending email
Sending SMS
Communicating with TCP
Creating an SMTP server
Implementing a virtual hosting paradigm
9
Writing Your Own Node Modules
Writing Your Own Node Modules
Introduction
Creating a test-driven module API
Writing a functional module mock-up
Refactoring from functional to prototypical
Extending the module's API
Deploying a module to npm
10
Taking It Live
Taking It Live
Introduction
Deploying to a server environment
Automatic crash recovery
Continuous deployment
Hosting with a Platform as a Service provider

Communicating with TCP

The Transmission Control Protocol (TCP) provides the backbone of HTTP communications. With TCP, we can open up interfaces between processes running on separate server hosts and remotely communicate between processes with less overhead and fewer complexities than HTTP.

Node provides us with the net module for creating TCP interfaces. When it comes to scaling, reliability, load balancing, synchronization, or real-time social communications, TCP is a fundamental element.

In this recipe, we're going to demonstrate the sort of foundation needed to communicate between processes over a network by setting up a TCP connection that allows us to remotely monitor and filter HTTP headers of website hits in real time.

Getting ready

We'll need two new files: server.js and monitor.js. Let's place them in a new folder.

How to do it...

First, let's create our first TCP server in server.js as follows:

var net = require('net');
var fauxHttp = net.createServer(function(socket) {
socket.write...
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