ねこのイラストを一括ダウンロードしてくるやつ

cat_list_downloader.rb

# coding: utf-8

require "nokogiri"
require "open-uri"
require "uri"

INDEXPAGEURL = "http://illustrain.com/?cat=19"
SAVEDIR = "./download"

html = open(INDEXPAGEURL).read

doc = Nokogiri::HTML(html, INDEXPAGEURL)

puts doc.title

pagelistarr = doc.css(".thumb-post-lists li a").map do |item|
  item.attr("href")
end

puts pagelistarr

pagelistarr.each do |url|
  html = open(url).read
  doc = Nokogiri::HTML(html, url)

  illusturl = doc.css(".bt-download a").attr("href")
  illustdata = open(illusturl).read
  filename = File.basename(illusturl)

  savepath = File.join(SAVEDIR, filename)
  open(savepath, "w+b") do |out|
    out.write(illustdata)
  end
end