Book Image

HTML5 Data and Services Cookbook

Book Image

HTML5 Data and Services Cookbook

Overview of this book

HTML5 is everywhere. From PCs to tablets to smartphones and even TVs, the web is the most ubiquitous application platform and information medium bar. Its becoming a first class citizen in established operating systems such as Microsoft Windows 8 as well as the primary platform of new operating systems such as Google Chrome OS. "HTML5 Data and Services Cookbook" contains over 100 recipes explaining how to utilize modern features and techniques when building websites or web applications. This book will help you to explore the full power of HTML5 - from number rounding to advanced graphics to real-time data binding. "HTML5 Data and Services Cookbook" starts with the display of text and related data. Then you will be guided through graphs and animated visualizations followed by input and input controls. Data serialization, validation and communication with the server as well as modern frameworks with advanced features like automatic data binding and server communication will also be covered in detail.This book covers a fast track into new libraries and features that are part of HTML5!
Table of Contents (21 chapters)
HTML5 Data and Services Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Using the FormData interface


One of the new features added to XMLHttpRequest Level 2 (http://www.w3.org/TR/XMLHttpRequest2/) is the FormData object. This enables us to use a set of key-value pairs that can be sent using AJAX. The most common use is in sending binary files or any other large amount of data. In this recipe, we will create two scripts that will send FormData, one with a plain JavaScript and the other with jQuery, as well as the server-side code to support it.

Getting ready

The server will be done in Nodejs using restify (http://mcavage.github.io/node-restify/). In order to install the dependencies, a package.json file can be created where restify will be added.

How to do it...

  1. The server should be able to accept HTTP POST with type multipart/form-data; that is why there is a built-in plugin for restify called BodyParser. This will block the parsing of the HTTP request body:

    var server = restify.createServer();
    server.use(restify.bodyParser({ mapParams: false }));
    server.post('hi...