find all public files indexed by google inside url https://ceditor.setka.io/stk-plugins

require 'open-uri'
require 'nokogiri'
require 'google_drive'

def find_all_public_files_indexed_by_google(url, path_to_google_drive_credentials)
  session = GoogleDrive::Session.from_service_account_key(path_to_google_drive_credentials)

  all_urls = get_all_urls(url)
  all_public_files = all_urls.select { |url| get_result_from_google(url) }
  all_public_files.each { |url| download_file(url, session) }
    
  puts 'done'
end

def get_all_urls(url)
  doc = Nokogiri::HTML(open(url))
  a_tags = doc.css('a')
  a_tags.map { |a| a.attribute('href').value }
end

def get_result_from_google(url)
  google_url = "https://www.google.co.kr/