Book Image

Expert Delphi

By : Paweł Głowacki
Book Image

Expert Delphi

By: Paweł Głowacki

Overview of this book

Delphi is the most powerful Object Pascal IDE and component library for cross-platform native app development. It enables building natively compiled, blazingly fast apps for all major platforms including Android, iOS, Windows, Mac, and Linux. If you want to build server-side applications, create web services, and have clear GUIs for your project, then this book is for you. The book begins with a basic primer on Delphi helping you get accustomed to the IDE and the Object Pascal language and will then quickly move on to advanced-level concepts. Through this book, we’ll help you understand the architecture of applications and will teach you the important concepts of the FireMonkey library, show you how to build server-side services, and enable you to interact with the Internet of Things. Towards the end, you will learn to integrate your app with various web services and deploy them. By the end of the book, you will be able to build powerful, cross-platform, native apps for iOS and Android with a single code base.
Table of Contents (14 chapters)

Consuming XML SOAP web services

The starting point for implementing the SOAP web service client is the Web Services Description Language (WSDL) document, which specifies what web methods a given web service implements and what are the names and types of the expected parameters. Delphi provides the WSDL Importer wizard that takes as input a WSDL file and generates the Object Pascal unit with types and methods that correspond with the functionality exposed by a SOAP web service. The main application logic can use these generated classes in order to issue web services requests and receive results returned from the remote web services server app.

Let's have a look at the process of integrating with a SOAP web service on the example of the WHOIS service. This is a test service hosted by www.webservicesx.net. It provides the interface to the WhoIs internet service, where you can...