Sybren Kooistra doubt - http://www.ruby-forum.com/topic/4405257

sybren.rb

require 'nokogiri'
require 'open-uri'

def get_search_result_links(n_page)
  links = n_page.css('.linker-kolom li a')
  puts "** There were #{links.length} links found"
  links.each do |link|
    href = link['href']
    inner_url = 'https://zoek.officielebekendmakingen.nl' + href
    puts "\n\n\nFetching page at #{File.basename(inner_url).split('?')[0]}"

    datalezer = open(inner_url).read
    lokalenieuwefilenaam = href + ".html"
    lokalenieuwefile = open(lokalenieuwefilenaam, "w")
    lokalenieuwefile.write(datalezer)
    lokalenieuwefile.close
  end
end

INITIAL_URL = 'https://zoek.officielebekendmakingen.nl/zoeken/resultaat/?zkt=Uitgebreid&pst=ParlementaireDocumenten'
initial_page = Nokogiri::HTML(open(INITIAL_URL))
pagination_links = initial_page.css('.paginering.beneden a')
last_page_link = pagination_links[-2]
last_page_number = last_page_link.text.to_i
(5..last_page_number).each do |page_num|
  puts "\n\n\n***** Getting page #{page_num}"
  results_page_url = "#{INITIAL_URL}&_page=#{page_num}"
  results_page = Nokogiri::HTML(open(results_page_url))
  get_search_result_links(results_page)
end