Learn how to advance your skill level of Haskell, and use this language for practical web development. This book uses a direct, no nonsense approach, so you no longer need to spend extra time reading the documentation, blog posts, and forums to understand how to use Haskell – all that knowledge is provided in one coherent resource.
You'll start by reviewing how multiple facets of web development are done in Haskell, such as routing, building HTMLs, interacting with databases, caches, and queues, etc. You'll then move on to using notable libraries, such as "scotty" for routings, "digestive-functor" for input validation, and "postgresql-simple" for interacting with databases.
In the later chapters, you'll learn how all of these libraries can be used together by working on a fully functioning project deployed on Heroku.

What You'll Learn
• Set up a productive Haskell development environment
• Review basic tasks that are encountered when building web applications.
• Explore how to interact with external systems, such as databases, queues, and RESTful APIs.
• Build a RESTful API, website, building views and form validation.

Who This Book Is For

Software developers familiar Haskell and would like to apply the knowledge on real world applications and software developers new to Haskell.

学习如何提高你的Haskell技能水平，并使用这种语言进行实际的Web开发。本书采用直接、无废话的方法，因此你不再需要花额外的时间阅读文档、博文和论坛来了解如何使用Haskell，所有这些知识都在一个连贯的资源中提供。

你将首先回顾Web开发的多个方面是如何在Haskell中完成的，如路由、构建HTML、与数据库、缓存和队列交互等等。然后，你将继续使用著名的库，如用于路由的 "scotty"，用于输入验证的 "digestive-functor"，以及用于与数据库交互的 "postgresql-simple"。

在后面的章节中，你将学习如何通过在Heroku上部署一个功能齐全的项目来共同使用所有这些库。

你会学到什么

- 建立一个高效的Haskell开发环境

- 回顾构建Web应用程序时遇到的基本任务。

- 探索如何与外部系统互动，如数据库、队列和RESTful APIs。

- 构建一个RESTful API、网站、构建视图和表单验证。

本书适用对象

熟悉Haskell并希望在实际应用中应用这些知识的软件开发人员，以及刚接触Haskell的软件开发人员。