Book Image

Delphi Cookbook - Third Edition

By : Spinetti, Daniele Teti
Book Image

Delphi Cookbook - Third Edition

By: Spinetti, Daniele Teti

Overview of this book

Delphi is a cross-platform integrated development environment (IDE) that supports rapid application development on different platforms, saving you the pain of wandering amid GUI widget details or having to tackle inter-platform incompatibilities. Delphi Cookbook begins with the basics of Delphi and gets you acquainted with JSON format strings, XSLT transformations, Unicode encodings, and various types of streams. You’ll then move on to more advanced topics such as developing higher-order functions and using enumerators and run-time type information (RTTI). As you make your way through the chapters, you’ll understand Delphi RTL functions, use FireMonkey in a VCL application, and cover topics such as multithreading, using aparallel programming library and deploying Delphi on a server. You’ll take a look at the new feature of WebBroker Apache modules, join the mobile revolution with FireMonkey, and learn to build data-driven mobile user interfaces using the FireDAC database access framework. This book will also show you how to integrate your apps with Internet of Things (IoT). By the end of the book, you will have become proficient in Delphi by exploring its different aspects such as building cross-platforms and mobile applications, designing server-side programs, and integrating these programs with IoT.
Table of Contents (12 chapters)

Controlling the remote application using UDP

What's UDP? The User Datagram Protocol, or UDP, is a connectionless protocol used by everyone every day, but it seems that not too many people know about it. However, it can be really useful to solve particular network problems. Like TCP, UDP works at the transport layer TCP/IP model but it has a very different usage. Compared to TCP, UDP is a simpler message-based connectionless protocol. Connectionless protocols do not set up a dedicated end-to-end connection. Instead, communication is achieved by transmitting information in one direction from the source to the destination without verifying the readiness or state of the receiver. However, one primary benefit of UDP over TCP is the application to the Voice over Internet Protocol (VoIP), where latency and jitter are the primary concerns. It is assumed in VoIP UDP that the end users...