RB.RobotsHandler (nuget): The Robots Handler package provides editors with the ability to dynamically change the contents of a site's robots file. Instead of storing the contents of a robots file on the file system, an editor can specify its contents in an Umbraco content page. The property content is then served via a Http Handler for the current site. This package works for multi-site Umbraco installations, meaning it will serve the correct contents for a requested domain's robots file.
Keywords: umbraco|robots|txt|handler