Book Image

Python Web Development with Sanic

By : Adam Hopkins
Book Image

Python Web Development with Sanic

By: Adam Hopkins

Overview of this book

Today’s developers need something more powerful and customizable when it comes to web app development. They require effective tools to build something unique to meet their specific needs, and not simply glue a bunch of things together built by others. This is where Sanic comes into the picture. Built to be unopinionated and scalable, Sanic is a next-generation Python framework and server tuned for high performance. This Sanic guide starts by helping you understand Sanic’s purpose, significance, and use cases. You’ll learn how to spot different issues when building web applications, and how to choose, create, and adapt the right solution to meet your requirements. As you progress, you’ll understand how to use listeners, middleware, and background tasks to customize your application. The book will also take you through real-world examples, so you will walk away with practical knowledge and not just code snippets. By the end of this web development book, you’ll have gained the knowledge you need to design, build, and deploy high-performance, scalable, and maintainable web applications with the Sanic framework.
Table of Contents (16 chapters)
1
Part 1:Getting Started with Sanic
4
Part 2:Hands-On Sanic
11
Part 3:Putting It All together

Setting up an effective CORS policy

If you are building a web application where the server exclusively responds to requests on a single computer, and that computer is physically disconnected from the internet, perhaps this section is not as relevant to you. For anyone else, pay attention! To be clear, you are part of "anyone else." This is important stuff.

In simple terms, cross-origin resource sharing (CORS) is a fancy way of saying accessing one domain from another domain with a browser. Without an effective strategy to handle this, your application could open up a security risk for your users.

What is the security issue with ineffective CORS?

The modern web uses a lot of JavaScript in web browsers. This enables all kinds of interactive and quality user experiences. One of those capabilities is to issue requests for data on behalf of the user without them knowing about it. This feature is one of the biggest differentiators between web applications today and web...