Book Image

Apps and Services with .NET 7

By : Mark J. Price
Book Image

Apps and Services with .NET 7

By: Mark J. Price

Overview of this book

Apps and Services with .NET 7 is for .NET 6 and .NET 7 developers who want to kick their C# and .NET understanding up a gear by learning the practical skills and knowledge they need to build real-world applications and services. It covers specialized libraries that will help you monitor and improve performance, secure your data and applications, and internationalize your code and apps. With chapters that put a variety of technologies into practice, including Web API, OData, gRPC, GraphQL, SignalR, and Azure Functions, this book will give you a broader scope of knowledge than other books that often focus on only a handful of .NET technologies. It covers the latest developments, libraries, and technologies that will help keep you up to date. You’ll also leverage .NET MAUI to develop mobile apps for iOS and Android as well as desktop apps for Windows and macOS.
Table of Contents (23 chapters)

Relaxing the same origin security policy using CORS

Modern web browsers support multiple tabs so users can visit multiple websites at the same time efficiently. If code executing in one tab could access resources in another tab, then that could become a method of attack.

All web browsers implement a security feature called the same origin policy. This means that only requests that come from the same origin are allowed. For example, if a block of JavaScript is served from the same origin that hosts a web service or served an <iframe>, then that JavaScript can call the service and access the data in the <iframe>. If a request is made from a different origin, then the request fails.

An origin is defined by the following:

  • Scheme aka protocol, for example, HTTP or HTTPS
  • Port (if specified)
  • Host/domain/subdomain, for example,,,

If the origin is, then the following...