Understanding the Fetch Metadata HTTP headers: Sec-Fetch-Site and friends

This article provides a detailed overview of the Fetch Metadata HTTP headers, including Sec-Fetch-Dest, Sec-Fetch-Site, Sec-Fetch-Mode, and Sec-Fetch-User. It explains what each header means, when browsers send them, and how servers can use them to gain trusted context about HTTP requests, such as whether a request is from a user click, a fetch() call, or a cross-origin source. The article discusses the security benefits, particularly in preventing cross-site request forgery (CSRF), and mentions upcoming .NET 11 integration. It is a technical guide aimed at developers and IT professionals interested in web security and HTTP protocol details.