Ruby script to get a list of leap-second adjustment.

get_leapsec_nict.rb

#! /usr/local/bin/ruby
# coding: utf-8
#---------------------------------------------------------------------------------
#= Ruby script to get a list of leap-second adjustment.
#
#  date          name            version
#  2016.07.25    mk-mode         1.00 新規作成
#
#  Copyright(C) 2016 mk-mode.com All Rights Reserved.
#---------------------------------------------------------------------------------
#
require 'kconv'
require 'nokogiri'
require 'open-uri'
require 'pp'

class GetLeapcecNict
  URL = "http://jjy.nict.go.jp/QandA/data/leapsec.html"
  UA  = "mk-mode Bot (by Ruby/#{RUBY_VERSION}, Administrator: postmaster@mk-mode.com)"

  def exec
    leapsecs = [[0, 1972, 1, 1, -10]]

    begin
      html = open(URL, "r:sjis", {"User-Agent" => UA}) { |f| f.read }.toutf8
      doc = Nokogiri::HTML.parse(html)
      doc.xpath("//pre").text.split("\n").each do |line|
        l = line.scan(/[\s　]+(.+?)[\s　]+(.+?)[\s　]*年[\s　]*(.+?)[\s　]*月[\s　]*(.+?)[\s　]*日.+?秒[\s　]*(.+?)[\s　]*秒$/)[0]
        next unless l
        leapsecs << l.map { |a| NKF::nkf("-WwZ1", a).to_i }
      end
      pp leapsecs.sort
    rescue => e
      msg = "[#{e.class}] #{e.message}\n"
      msg << e.backtrace.map { |tr| "\t#{tr}\n" }.join("\n")
      $stderr.puts msg
    end
  end
end

GetLeapcecNict.new.exec if __FILE__ == $0