module FilenameSanitizer
  def sanitize_filename(filename)
    returning filename.strip do |name|
      # Get only the filename, not the whole path 
      name.gsub! /^.*(\\|\/)/, ''
      # Replace all non alphanumeric, underscore or periods with underscore
      name.gsub! /[^\w\.\-]/, '_' 
    end
  end
end