下载某页面下的所有图片

require 'net/http'

require 'fileutils'

require "open-uri"

response_html = Net::HTTP.get('url', '/', 3000)

response_html.scan(/<img.*?src=['"](.*?)['"].*?>/).each do |img|

  if img[0]==''

    next

  end

  img[0].scan(/[\/](.*)[\/](.*)/)

  FileUtils.mkdir_p($1)



  begin

    imguri = "url"+img[0].strip

    data=open(imguri){|f|f.read}

    open($1+'/'+$2,"wb"){|f|f.write(data)}

  rescue

    puts imguri

    #break

  end

end