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Build Your Own Web Framework in Elixir

You're reading from   Build Your Own Web Framework in Elixir Develop lightning-fast web applications using Phoenix and metaprogramming

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Product type Paperback
Published in Jun 2023
Publisher Packt
ISBN-13 9781801812542
Length 274 pages
Edition 1st Edition
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Author (1):
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Aditya Iyengar Aditya Iyengar
Author Profile Icon Aditya Iyengar
Aditya Iyengar
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Toc

Table of Contents (15) Chapters Close

Preface 1. Part 1: Web Server Fundamentals
2. Chapter 1: Introducing the Cowboy Web Server FREE CHAPTER 3. Chapter 2: Building an HTTP Server in Elixir 4. Part 2: Router, Controller, and View
5. Chapter 3: Defining Web Application Specifications Using Plug 6. Chapter 4: Working with Controllers 7. Chapter 5: Adding Controller Plugs and Action Fallback 8. Chapter 6: Working with HTML and Embedded Elixir 9. Chapter 7: Working with Views 10. Part 3: DSL Design
11. Chapter 8: Metaprogramming – Code That Writes Code 12. Chapter 9: Controller and View DSL 13. Chapter 10: Building the Router DSL 14. Index

Adding Controller Plugs and Action Fallback

In the last chapter, we built a framework to write a controller and wrapped it inside the Goldcrest.Controller module. In this chapter, we will learn about extending the functionality of our controllers by intercepting an incoming request and calling specific plugs on it based on the controller’s definition before letting the controller’s actions handle that request. This will give developers the means to add better control of the request flow while keeping their controller code simple and digestible. We will learn how to use the Plug.Builder module to build a pipeline of plugs in a controller. We will then learn how to apply a pipeline of plugs to an action and how to define a fallback controller to capture any errors.

By the end of the chapter, you will understand Plug.Builder enough to build complex plug pipelines without needing Phoenix or any other libraries other than Plug itself. You will also learn how Phoenix implements...

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