Fedora DOS Attack?

gistfile1.rb

require 'csv'

CSV.open("list_of_pids.csv", "rb").each do |csv|
  pid = csv[1]

  ["JP2", "THUMBNAIL", "WIDE_THUMBNAIL", "REFERENCE_THUMBNAIL"].each do |ds_id|      
    response = `curl --silent -I "http://example.org:8080/fedora/objects/#{pid}/datastreams/#{ds_id}/content" --user "fedoraAdmin:somepassword"`
    puts "#{csv[0]},#{csv[1]},#{ds_id},#{response.lines.first}"
  end
end