def respond_with_with_webdav(*resources, &block)
      if request.propfind?
        render :webdav => :propstat, :respond_to_block => block
      else
        respond_with_without_webdav *resources, &block
      end
    end
def respond_with_with_webdav(*resources, &block)
      if request.propfind?
        render :webdav => :propstat, :respond_to_block => block
      else
        respond_with_without_webdav *resources, &block
      end
    end
decorate behaviour defined in ActionController::MimeResponds