Book Image

Groovy 2 Cookbook

Book Image

Groovy 2 Cookbook

Overview of this book

Get up to speed with Groovy, a language for the Java Virtual Machine (JVM) that integrates features of both object-oriented and functional programming. This book will show you the powerful features of Groovy 2 applied to real-world scenarios and how the dynamic nature of the language makes it very simple to tackle problems that would otherwise require hours or days of research and implementation. Groovy 2 Cookbook contains a vast number of recipes covering many facets of today's programming landscape. From language-specific topics such as closures and metaprogramming, to more advanced applications of Groovy flexibility such as DSL and testing techniques, this book gives you quick solutions to everyday problems. The recipes in this book start from the basics of installing Groovy and running your first scripts and continue with progressively more advanced examples that will help you to take advantage of the language's amazing features. Packed with hundreds of tried-and-true Groovy recipes, Groovy 2 Cookbook includes code segments covering many specialized APIs to work with files and collections, manipulate XML, work with REST services and JSON, create asynchronous tasks, and more. But Groovy does more than just ease traditional Java development: it brings modern programming features to the Java platform like closures, duck-typing, and metaprogramming. In this new book, you'll find code examples that you can use in your projects right away along with a discussion about how and why the solution works. Focusing on what's useful and tricky, Groovy 2 Cookbook offers a wealth of useful code for all Java and Groovy programmers, not just advanced practitioners.
Table of Contents (17 chapters)
Groovy 2 Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Using OAuth for web service security


The OAuth protocol became one of the dominant ways to perform authorization in the emerging amount of web applications and services. The final draft of v1.0 was released in 2007. In 2009, v1.0a was published to fix a security flaw known as session fixation.

In October 2012, OAuth 2.0 was released. It is not backward compatible with OAuth 1.0a. OAuth 2.0 received a lot of negative criticism, even though some of the major providers (such as Google or Facebook) support OAuth 2.0 already. Furthermore, the new protocol specification leaves too many open points to the implementer, which makes it somewhat hard to apply a generic approach to.

In this recipe, we will cover the OAuth 1.0a protocol and how it can be used to authorize your access to the Twitter API.

Getting ready

The scenario that we will try to achieve is a standalone application that reads tweets on a user's behalf:

  1. First of all, you need to register your application (script) with Twitter through this...