Book Image

Learning Azure Functions

By : Mitesh Soni, Manisha Yadav
Book Image

Learning Azure Functions

By: Mitesh Soni, Manisha Yadav

Overview of this book

Functions help you easily run small pieces of code in cloud with Azure functions without worrying about a whole application or the infrastructure to run it. With Azure functions, you can use triggers to execute your code and bindings to simplify the input and output of your code. This book will start with the basics of Azure Functions. You will learn the steps to set up the environment and the tools that we will be using in the further chapters. Once you have a better understanding of this, we will be creating our first hello world function app. Later you will be introduced to triggers, how they are used to activate a function, and how binding can be used to output results of a function.You will also explore the steps to create an assembly with complex functionality that can be used by functions. Next, this book will teach you to scale your functions and use them to process data, integrate systems, and build simple APIs and microservices. Finally, this book will cover some diagnostic techniques with Azure App services and best practices of working with Azure Functions. By the end of this book, you will be well-versed with the techniques of scaling your Azure functions and making the most of serverless architecture.
Table of Contents (17 chapters)
Title Page
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Dedication
Preface

Chapter 5. Webhooks for Azure Functions

"Simplicity is a great virtue but it requires hard work to achieve it and education to appreciate it. And to make matters worse: complexity sells better"

- Edsger Dijkstra

This chapter illustrates the use of Webhook, even binding Webhook as the output in the Azure Function. It illustrates events with simple example. We will focus on topics such as the following:

  • Creating JavaScript functions triggered by Webhook
  • Using a Webhook with an Azure Function
  • Using an event with an Azure Function

Let's start with an introduction to Webhook before using it in our functions.

So, what is a Webhook? Webhooks are user-defined HTTP callbacks. They are usually triggered by some event, such as pushing code to a repository or a comment being posted to a blog. A web application implementing Webhooks will POST a message to a URL when certain things happen. Sometimes people call Webhooks reverse APIs, but perhaps more accurately a Webhook lets you skip a step. With most APIs...