How deeply does Building Web APIs with ASP.NET Core cover x-frame-options?

Defines the security purpose and demonstrates a sameorigin middleware configuration, without detailing browser validation or testing.

X-frame-options

As explained in Building Web APIs with ASP.NET Core

An HTTP response header that controls whether a browser may render a page inside frames or iframes.

X-Frame-Options is an HTTP response header that helps protect a web API from clickjacking by controlling which sources may load its pages inside FRAME or IFRAME elements. section 12.1.4

Add the header in Program.cs with the other HTTP security headers. The shown configuration runs outside development and sets the value to sameorigin, allowing framing only from the same origin. section 12.1.4

Configure the response header

Inside the production branch, add middleware that appends context.Response.Headers.Add("X-Frame-Options", "sameorigin"). Keep it alongside HSTS, X-XSS-Protection, X-Content-Type-Options, Content-Security-Policy, and Referrer-Policy settings.

How Building Web APIs with ASP.NET Core covers it

Cover of Building Web APIs with ASP.NET Core

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Related concepts

browserconfigures · A web browser is software that retrieves, interprets, and renders web resources, executes supported web content, and enables interaction with web pages and applications.
Content-Security-Policyalternative to · Content Security Policy is a web security standard that lets a site specify browser-enforced rules restricting the sources and forms of content a document may load or execute.

This explainer was generated by Manning's knowledge graph from the text of Building Web APIs with ASP.NET Core. The section links point to the parts of the book it draws on.