And you can also add custom headers like the below code:   procedure TUniServerModule.UniGUIServerModuleHTTPCommand( ARequestInfo: TIdHTTPRequestInfo; AResponseInfo: TIdHTTPResponseInfo; var Handled: Boolean); begin AResponseInfo.CustomHeaders.AddValue('X-Content-Type-Options', 'nosniff'); AResponseInfo.CustomHeaders.AddValue('X-Frame-Options', 'SAMEORIGIN'); AResponseInfo.CustomHeaders.AddValue('X-XSS-Protection', '1; mode=block'); end;  
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