Module: Tuktuk::DNS

Defined in:
lib/tuktuk/dns.rb

Class Method Summary collapse

Class Method Details

.get_mx(host) ⇒ Object 



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# File 'lib/tuktuk/dns.rb', line 13

def get_mx(host)
  if defined?(Resolv::DNS)
    get_using_resolve(host)
  else
    get_using_net_dns(host)
  end
end

.get_using_net_dns(host) ⇒ Object 



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# File 'lib/tuktuk/dns.rb', line 29

def get_using_net_dns(host)
  if res = Net::DNS::Resolver.new.mx(host)
    sort_mx(res)
  end
end

.get_using_resolve(host) ⇒ Object 



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# File 'lib/tuktuk/dns.rb', line 21

def get_using_resolve(host)
  Resolv::DNS.open do |dns|
    if res = dns.getresources(host, Resolv::DNS::Resource::IN::MX)
      sort_mx(res)
    end
  end
end

.sort_mx(res) ⇒ Object 



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# File 'lib/tuktuk/dns.rb', line 35

def sort_mx(res)
  res.sort {|x,y| x.preference <=> y.preference}.map { |rr| rr.exchange.to_s }
end