Chapter 33. Introduction to WSE 2.0

IN BRIEF

The previous chapter provided an introduction to the basic concepts dealing with web services. You saw that a web service is essentially a method of transmitting messages over the Internet using an agreed-upon message format. Web Services Description Language (WSDL) defines the interface to the web service, whereas Simple Object Access Protocol (SOAP) defines the format of messages to be used in communicating between the service and the client.

This chapter will introduce you to additional web service standards, such as WS-Security, and other standards, such as DIME for attaching files to XML messages, and much more. Web Service Enhancements (WSE) 2.0 is a powerful set of tools and APIs that take the basic web service functionality to a whole new level. This chapter will show you just a few of the many different features available within WSE.

WHAT YOU NEED

REQUIRED SOFTWARE	.NET Framework SDK v1.1 Visual Studio .NET 2003 with C# installed Windows XP/2000 Pro or Windows Server 2003 IIS version 5+ WSE 2.0 Service Pack 1
RECOMMENDED HARDWARE	PC that meets .NET SDK minimum requirements
SKILLS REQUIRED	C# and .NET familiarity

INTRODUCTION TO WSE 2.0 AT A GLANCE

Introduction to WSE 2.0		679
	Overview of GXA	679	Evolution of WSE	679
TCP Messaging		679
	SOAP over TCP	680	The SoapService Class	683
	SoapSender and SoapReceiver	680	The SoapClient Class	686
Security		687
	Introduction to WSE Security	687	X.509 Certificates	689
	UsernameTokens	688	Signing Messages	690
Messaging with Attachments Using WSE 2.0		690
	Introduction to DIME	690	Transferring files via WSE	691
Summary		691
Further Reading		691