Book Image

Microsoft Windows Communication Foundation 4.0 Cookbook for Developing SOA Applications

By : Juntao Cheng
Book Image

Microsoft Windows Communication Foundation 4.0 Cookbook for Developing SOA Applications

By: Juntao Cheng

Overview of this book

The Windows Communication Foundation 4.0 (WCF 4.0) is a .NET-based application programming interface for building and running connected systems. It enables secure and reliable communication among systems within an organization or across the Internet. This book deals with the difficult issues faced by a .NET developer while working with WCF.WCF 4.0 is a communications infrastructure that unifies a broad array of distributed systems' capabilities in a composable, extensible architecture that supports multiple transports, messaging patterns, encodings, network topologies, and hosting models. This book is a collection of focused real-world recipes and covers basic recipes on topics such as working with contracts to more advanced topics such as extending WCF runtime. By the end of this book you will have valuable information that helps transform the potentially unproductive habits of .Net developers who work with WCF.This book will take you through many concepts starting with complete support for contract-related design for WCF service development. You will learn to use WCF's built-in feature for building various service endpoints. Service hosting and configuration are important areas for building WCF services, especially at the service deployment stage, and are detailed in this book. You will find it easy to work with WCF client proxy generation and metadata publishing and discovery when you go through recipes such as customizing auto-generated service proxies.The author then discusses the exchange of data in WCF service operation features, related to WCF data serialization. You will discover some useful tips for security in WCF service development and built-in features for developing concurrency control for your services built upon it.One big plus is that you will learn to extend the existing WCF framework to achieve advanced functionality. You will find a dedicated chapter for RESTful and AJAX-enabled service development. Moving on, you will find several useful WCF service interoperability cases, which are important for a distributed service development platform. Towards the end of this book you will find some handy and useful diagnostic methods for troubleshooting.
Table of Contents (20 chapters)
Microsoft Windows Communication Foundation 4.0 Cookbook for Developing SOA Applications
Credits
Foreword
About the Author
About the Reviewers
Preface
Index

Accessing a remote REST service in an AJAX client


As we have discussed in the Consuming a WCF service from an ASP.NET AJAX client recipe, ASP.NET AJAX script can consume a WCF REST service (with webScript behavior enabled) through the ScriptManager control. However, this kind of AJAX script client can only consume WCF services that are hosted in the same web application as the Web pages. Trying to access a remote WCF service through the ASP.NET AJAX script will not work. Don’t worry, we have found some alternative ways to work around this problem.

In this recipe, we will demonstrate a very simple way to call a remote WCF REST service in an ASP.NET web page via jQuery-based AJAX script.

How to do it...

Since XSS protection prevents AJAX scripts from sending HTTP POST requests to a remote service host, the solution we will demonstrate here is to use AJAX script to consume a remote WCF REST service through the HTTP GET method.

  1. Configure the target WCF REST service to open HTTP GET-based endpoints...