net_http.rb

require 'net/http'

def download_net_http(uris, thread_count)
  queue = Queue.new
  uris.map { |uri| queue << uri }

  threads = thread_count.times.map do
    Thread.new do
      
      while !queue.empty? && uri = queue.pop
        Net::HTTP.start(uri.host, uri.port, use_ssl: uri.scheme=='https') do |http|
          request = Net::HTTP::Get.new(uri)
          response = http.request request
          write_file filename, response.body
        end
      end
    end
  end

  threads.each(&:join)
end