require 'net/http'
require 'open-uri'
require 'fastimage'
require 'json'

downloaded_urls = []
while(true)
  uri = URI('http://radikal.ru/Img/GetGalleryPage')
  params = { AnchorId: "", PageSize: 40 }
  uri.query = URI.encode_www_form(params)
  begin
    page = Net::HTTP.get(uri)
  rescue Exception => e
    next
  end
  JSON.parse(page)["Imgs"].map { |e| e["Url"] }.each do |url|
    next if downloaded_urls.include?(url)
    image_path = "images/#{Time.now.to_i}_#{File.basename(url)}"
    size = FastImage.size(url)
    next if size.nil? || (size.first < 350 && size.last < 350)
    File.open(image_path, 'wb') do |output|
      puts "Загружаю #{url}..."
      begin
        output.write(open(url, "rb").read)
        downloaded_urls << url
      rescue Exception => e
        puts "[!] Не удалось загрузить #{url}"
      end
    end
  end
  sleep(10.0)
end