Book Image

Mastering Node.js

By : Sandro Pasquali
Book Image

Mastering Node.js

By: Sandro Pasquali

Overview of this book

Node.js is a modern development stack focused on providing an easy way to build scalable network software. Backed by a growing number of large companies and a rapidly increasing developer base, Node is revolutionizing the way that software is being built today. Powered by Google's V8 engine and built out of C++ modules, this is a JavaScript environment for the enterprise.Mastering Node.js will take the reader deep into this exciting development environment. Beginning with a comprehensive breakdown of its innovative non-blocking evented design, Node's structure is explained in detail, laying out how its blazingly fast I/O performance simplifies the creation of fast servers, scalable architectures, and responsive web applications.Mastering Node.js takes you through a concise yet thorough tour of Node's innovative evented non-blocking design, showing you how to build professional applications with the help of detailed examples.Learn how to integrate your applications with Facebook and Twitter, Amazon and Google, creating social apps and programs reaching thousands of collaborators on the cloud. See how the Express and Path frameworks make the creation of professional web applications painless. Set up one, two, or an entire server cluster with just a few lines of code, ready to scale as soon as you're ready to launch. Move data seamlessly between databases and file systems, between clients, and across network protocols, using a beautifully designed, consistent, and predictable set of tools.Mastering Node.js contains all of the examples and explanations you'll need to build applications in a short amount of time and at a low cost, running on a scale and speed that would have been nearly impossible just a few years ago.
Table of Contents (20 chapters)
Mastering Node.js
About the Author
About the Reviewers

Creating and streaming images with Node

Having gone over the main strategies for initiating and diverting streams of data, let's practice the theory by creating a service to stream (aptly named) PNG (Portable Network Graphics) images to a client. This will not be a simple file server, however. The goal is to create PNG data streams by piping the output stream of an ImageMagick convert operation executing in a separate process into the response stream of an HTTP connection, where the converter is translating another stream of SVG (Scalable Vector Graphics) data generated within a virtualized DOM (Document Object Model) existing in the Node runtime. Let's get started.


The full code for this example can be found in your code bundle.

Our goal is to use Node to generate pie charts dynamically on a server based on client requests. A client will specify some data values, and a PNG representing that data in a pie will be generated. We are going to use the D3.js library, which provides a Javascript...