Book Image

D Web Development

By : Kai Nacke
Book Image

D Web Development

By: Kai Nacke

Overview of this book

D is a programming language with C-like syntax and static typing. The vibe.d framework builds on powerful D concepts like template meta-programming and compile-time function execution to provide an easy-to-use environment for web applications. The combination of a feature-rich web programming framework with a language compiling to native code solves two common issues in web development today: it accelerates your development and it results in fast, native web applications. Learning the vibe.d framework before you start your application will help you to choose the right features to reach your goal. This book guides you through all aspects of web development with D and the vibe.d framework. Covering the popular operating systems today, this guide starts with the setup of your development system. From the first Hello World-style application you will move on to building static web pages with templates. The concise treatment of web forms will give you all the details about form handling and web security. Using the abstractions of the web framework you will learn how to easily validate user input. Next, you will add database access to your application, providing persistent storage for your data. Building on this foundation, you will expose your component and integrate other components via REST. Learning about the internals of vibe.d you will be able to use low-level techniques such as raw TCP access. The vibe.d concepts can also be used for GUI clients, which is the next topic that you will learn. vibe.d is supported by an active community, which adds new functionality. This comprehensive guide concludes with an overview of the most useful vibe.d extensions and where to find them. It also shows you how to integrate these extensions in your application. The concepts are always illustrated with source code, giving you an insight into how to apply them in your application.
Table of Contents (17 chapters)
D Web Development
About the Author
About the Reviewers

Storing session data

The note application is currently stateless. The entered data is displayed once and then it is lost. This is not useful. You need a place to store the data between requests. This place is the session. To use session, you have to instantiate SessionStore at server startup. A class implementing the SessionStore interface stores key/value pairs as an associative array. You start a session by calling the startSession() method of the response object and terminate a session with the terminateSession() method.

A cookie-based session is used by vibe.d. The session is available in the session member of the request if you previously called the startSession() method and if the client sends back a matching cookie.

The SessionStore is an interface. If you are only running a single instance of your vibe.d server, then you can use the simple MemorySessionStore implementation. If you use any kind of multiserver setup, then you need a persistent session store. The interface for the Redis...