Programming Web Services with SOAP

The web services architecture provides a new way to think about and implement application - to - application integration and interoperability that makes the development platform irrelevant. Two applications, regardless of operating system, programming language, or any other technical implementation detail, communicate using XML messages over open Internet protocols such as HTTP or SMTP. The Simple Open Access Protocol (SOAP) is a specification that details how to encode that information and has become the messaging protocol of choice for Web services. Programming Web Services with SOAP is a detailed guide to using SOAP and other leading web services standards - WSDL (Web Service Description Language), and UDDI (Universal Description, Discovery, and Integration protocol). You'll learn the concepts of the web services architecture and get practical advice on building and deploying web services in the enterprise. Cover 1 Table of Contents 3 Preface 5 Audience for This Book 5 Structure of This Book 6 Conventions 7 Comments and Questions 7 Acknowledgments 8 1. Introducing Web Services 10 1.1 What Is a Web Service? 10 1.2 Web Service Fundamentals 10 1.3 The Web Service Technology Stack 14 1.4 Application 17 1.5 The Peer Services Model 17 2. Introducing SOAP 19 2.1 SOAP and XML 19 2.2 SOAP Messages 21 2.3 SOAP Faults 26 2.4 The SOAP Message Exchange Model 29 2.5 Using SOAP for RPC-Style Web Services 31 2.6 SOAP's Data Encoding 33 2.7 SOAP Data Types 36 2.8 SOAP Transports 40 3. Writing SOAP Web Services 43 3.1 Web Services Anatomy 101 43 3.2 Creating Web Services in Perl with SOAP::Lite 45 3.3 Creating Web Services in Java with Apache SOAP 50 3.4 Creating Web Services In .NET 56 3.5 Interoperability Issues 62 4. The Publisher Web Service 66 4.1 Overview 66 4.2 The Publisher Operations 67 4.3 The Publisher Server 68 4.4 The Java Shell Client 75 5. Describing a SOAP Service 83 5.1 Describing Web Services 83 5.2 Anatomy of a Service Description 87 5.3 Defining Data Types and Structures with XML Schemas 87 5.4 Describing the Web Service Interface 89 5.5 Describing the Web Service Implementation 90 5.6 Understanding Messaging Patterns 94 6. Discovering SOAP Services 97 6.1 The UDDI Registry 97 6.2 The UDDI Interfaces 100 6.3 Using UDDI to Publish Services 105 6.4 Using UDDI to Locate Services 109 6.5 Generating UDDI from WSDL 110 6.6 Using UDDI and WSDL Together 113 6.7 The Web Service Inspection Language (WS-Inspection) 115 7. Web Services in Action 118 7.1 The CodeShare Service Network 118 7.2 The Code Share Index 122 7.3 Web Services Security 124 7.4 Definitions and Descriptions 127 7.5 Implementing the CodeShare Server 132 7.6 Implementing the CodeShare Owner 141 7.7 Implementing the CodeShare Client 145 7.8 Seeing It in Action 147 7.9 What's Missing from This Picture? 147 7.10 Developing CodeShare 148 8. Web Services Security 149 8.1 What Is a "Secure" Web Service? 149 8.2 Microsoft Passport, Version 1.x and 2.x 151 8.3 Microsoft Passport, Version 3.x 152 8.4 Give Me Liberty or Give Me ... 153 8.5 A Magic Carpet 153 8.6 The Need for Standards 153 8.7 XML Digital Signatures and Encryption 153 9. The Future of Web Services 155 9. The Future of Web Services 155 9.2 The Future of SOAP 156 9.3 The Future of WSDL 156 9.4 The Future of UDDI 159 9.5 Web Services Battlegrounds 160 9.6 Technologies 162 9.7 Web Services Rollout 167 A. Web Service Standardization 169 A.1 Packaging Protocols 169 A.2 Description Protocols 169 A.3 Discovery Protocols 170 A.4 Security Protocols 171 A.5 Transport Protocols 172 A.6 Routing and Workflow 172 A.7 Programming Languages/Platforms 172 B. XML Schema Basics 174 B.1 Simple and Complex Types 174 B.2 Some Examples 176 B.3 XML Spy 179 C. Code Listings 181 C.1 Hello World in Perl 181 C.2 Hello World Client in Visual Basic 181 C.3 Hello World over Jabber 182 C.4 Hello World in Java 182 C.5 Hello, World in C# on .NET 183 C.6 Publisher Service 185 C.7 SAML Generation 198 C.8 Codeshare 211 Colophon 225 The web services architecture provides a new way to think about and implement application-to-application integration and interoperability that makes the development platform irrelevant. Two applications, regardless of operating system, programming language, or any other technical implementation detail, communicate using XML messages over open Internet protocols such as HTTP or SMTP. The Simple Open Access Protocol (SOAP) is a specification that details how to encode that information and has become the messaging protocol of choice for Web services. Programming Web Services with SOAP is a detailed guide to using SOAP and other leading web services standards--WSDL (Web Service Description Language), and UDDI (Universal Description, Discovery, and Integration protocol). You'll learn the concepts of the web services architecture and get practical advice on building and deploying web services in the enterprise. This authoritative book decodes the standards, explaining the concepts and implementation in a clear, concise style. You'll also learn about the major toolkits for building and deploying web services. Examples in Java, Perl, C#, and Visual Basic illustrate the principles. Significant applications developed using Java and Perl on the Apache Tomcat web platform address real issues such as security, debugging, and interoperability. Covered topic areas include: The Web Services Architecture SOAP envelopes, headers, and encodings WSDL and UDDI Writing web services with Apache SOAP and Java Writing web services with Perl's SOAP::Lite Peer-to-peer (P2P) web services Enterprise issues such as authentication, security, and identity Up-and-coming standards projects for web services Programming Web Services with SOAP provides you with all the information on the standards, protocols, and toolkits you'll need to integrate information services with SOAP. You'll find a solid core of information that will help you develop individual Web services or discover new ways to integrate core business processes across an enterprise "Programming Web Services with SOAP" introduces you to building distributed Wb-based applications using the SOAP, WSDL, and UDI protocols. You'll learn the XML underlying these standards, as well as how to use the popular toolkits for Java and Perl. The book also addresses security and other enterprise issues. This is an introduction to building distributed Web-based applications using the SOAP, WSDL, and UDDI protocols. You'll learn the XML underlying these standards, as well as how to use the popular toolkits for Java and Perl. The book also addresses security and other enterprise issues.