t7s-get-game-cover.rb

require 'fileutils'
require 'pathname'
require 'open-uri'
require 'net/http'

URL_TEMPLATE = 'http://t7s.jp/image/page/release/ingame/cover/%02d.png'

def save(url, base_path)
  puts url
  data = open(url).read
  filename = File.basename(url)

  open(Pathname.new(base_path) + filename, 'wb') do |out|
    out.write(data)
  end
end

def main
  save_dir = Pathname.new(File.expand_path('..', __FILE__)).join("cover")
  FileUtils.mkdir_p(save_dir)

  [*1..99].each do |i|
    begin
      save(URL_TEMPLATE % [i], save_dir)
    rescue OpenURI::HTTPError
      puts "#{$!.class}: #{$!.message}"
      exit
    end

    sleep 1
  end
end

main