Book Image

Azure for Developers. - Second Edition

By : Kamil Mrzygłód
5 (1)
Book Image

Azure for Developers. - Second Edition

5 (1)
By: Kamil Mrzygłód

Overview of this book

Microsoft Azure is currently one of the fastest growing public cloud service providers thanks to its sophisticated set of services for building fault-tolerant and scalable cloud-based applications. This second edition of Azure for Developers will take you on a journey through the various PaaS services available in Azure, including Azure App Service, Azure Functions, and Azure SQL Databases, showing you how to build a complete and reliable system with ease. Throughout the book, you’ll discover ways to enhance your skills when building cloud-based solutions leveraging different SQL/NoSQL databases, serverless and messaging components, containerized solutions, and even search engines such as Azure Cognitive Search. That’s not all!! The book also covers more advanced scenarios such as scalability best practices, serving static content with Azure CDN, and distributing loads with Azure Traffic Manager, Azure Application Gateway, and Azure Front Door. By the end of this Azure book, you’ll be able to build modern applications on the Azure cloud using the most popular and promising technologies to make your solutions reliable, stable, and efficient.
Table of Contents (32 chapters)
Part 1: PaaS and Containers
Part 2: Serverless and Reactive Architecture
Part 3: Storage, Messaging, and Monitoring
Part 4: Performance, Scalability, and Maintainability

Basics of Azure API Management policies with examples

In this section, we will focus on provisioning our own Azure API Management instance with a policy deployed. Before we start on the practical aspects, let’s define what a policy is.

As Azure API Management acts as a proxy for each request, it can apply various checks and enforcements for them. In other words, if we want to verify the contents of a request, validate it, block it, or apply a rate limit, a policy is exactly what we need.


Azure API Management allows for the deployment of both in-built and custom policies. In-built policies can also be changed to speed up the deployment of custom ones.

Policy schema

Each policy has a fixed schema that we can extend based on desired logic, as illustrated in the following code snippet:

    <!—- logic applied for incoming requests -->