CSP Header Generator

A small and simple library to help generate rules for CSP (Content-Security-Policy) headers.

Quick features:

• Enum for most common directive names
• Constants for some of the common values
• Can add your own directives, should the enum be incomplete
• Methods for quickly adding the ones used by Google Tag Manager and analytics (Used this as reference)

Example usage

CSPHeaderBuilder headerBuilder = new CSPHeaderBuilder(CSPHeaderBuilder.StaticValues.None);
headerBuilder.AddDirective(CSPHeaderBuilder.DirectiveType.Font, CSPHeaderBuilder.StaticValues.Self);
headerBuilder.AddDirective(CSPHeaderBuilder.DirectiveType.Img, CSPHeaderBuilder.StaticValues.Self);
headerBuilder.AddDirective(CSPHeaderBuilder.DirectiveType.Img, CSPHeaderBuilder.StaticValues.SchemaData);
headerBuilder.AddDirective(CSPHeaderBuilder.DirectiveType.Style, CSPHeaderBuilder.StaticValues.Self);
headerBuilder.AddGoogleTagManager();

Response.AddHeader("Content-Security-Policy", headerBuilder.ToString());