Contents

#!/usr/bin/env ruby

require 'resolv'

DOMAINS = [
    'officecdn.microsoft.com',
    'officecdn.microsoft.com.edgesuite.net',
    'ctldl.windowsupdate.com',
    'niig4.ocsp.secomtrust.net',
    'repo1.secomtrust.net',
    'scrootca1.ocsp.secomtrust.net',
    'scrootca2.ocsp.secomtrust.net',
    'repository.secomtrust.net',
    'ocsp.digicert.com'
    ]

MAXTTL = 3600

class Domain
	def initialize(name)
		@name = name
		@ias = {}
	end

	def update
		expires = @ias
		@ias = {}

		resolv = Resolv::DNS.new
		rs = resolv.getresources(@name, Resolv::DNS::Resource::IN::A)

		minttl = MAXTTL
		rs.each do |r|
			key = r.address.to_s
			@ias[key] = r
			if expires.has_key?(key)
				expires.delete(key)
				puts "#{@name}: #{key} update!!!"
			else
				puts "#{@name}: #{key} new!!!"
			end
			if minttl > r.ttl
				minttl = r.ttl
			end
		end
		expires.each do |k, v|
			puts "#{@name}: #{v.address} expires!!!"
		end
		return minttl
	end
end

domains = []
DOMAINS.each do |h|
	domains <<= Domain.new(h)
end

while true
	minttl = MAXTTL
	domains.each do |d|
		begin
			ttl = d.update
		rescue
			ttl = 1
		end
		if minttl > ttl
			minttl = ttl
		end
	end
	if minttl < 1
		minttl = 1
	end
	sleep minttl
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
netutils-0.1.2	bin/ipaddr-resolv
netutils-0.1.1	bin/ipaddr-resolv