Class: PassiveDNS::BFK

Inherits:
Object
  • Object
show all
Defined in:
lib/passivedns/client/bfk.rb

Constant Summary collapse

@@base = 
"http://www.bfk.de/bfk_dnslogger.html?query="

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ BFK

Returns a new instance of BFK.



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# File 'lib/passivedns/client/bfk.rb', line 6

def initialize
  @debug = false
end

Instance Attribute Details

#debug ⇒ Object

Returns the value of attribute debug.



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# File 'lib/passivedns/client/bfk.rb', line 5

def debug
  @debug
end

Instance Method Details

#lookup(label) ⇒ Object 



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# File 'lib/passivedns/client/bfk.rb', line 41

def lookup(label) 
  $stderr.puts "DEBUG: BFKClient.lookup(#{label})" if @debug
  Timeout::timeout(240) {
    t1 = Time.now
    open(
      @@base+label,
      "User-Agent" => "Ruby/#{RUBY_VERSION} passivedns-client rubygem v#{PassiveDNS::Client::VERSION}",
      :http_basic_authentication => [@user,@pass]
    ) do |f|
      t2 = Time.now
      parse(f.read,t2-t1)
    end
  }
rescue Timeout::Error => e
  $stderr.puts "BFK lookup timed out: #{label}"      
end

#parse(page, response_time) ⇒ Object 



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# File 'lib/passivedns/client/bfk.rb', line 10

def parse(page,response_time)
  line = page.unpack('C*').pack('U*').split(/<table/).grep(/ id=\"logger\"/)
  return [] unless line.length > 0
  line = line[0].gsub(/[\t\n]/,'').gsub(/<\/table.*/,'')
  rows = line.split(/<tr.*?>/)
  res = []
  rows.collect do |row|
    r = row.split(/<td>/).map{|x| x.gsub(/<.*?>/,'').gsub(/\&.*?;/,'')}[1,1000]
    if r and r[0] =~ /\w/
      # BFK includes the MX weight in the answer response. First, find the MX records, then dump the weight to present a consistent record name to the collecting array. Otherwise the other repositories will present the same answer and your results will become cluttered with duplicates.
      if r[1] == "MX" then
        # MX lines look like "5 mx.domain.tld", so split on the space and assign r[2] (:answer) to the latter part.
        #s = r[2].split(/\w/).map{|x| x}[1,1000]
        # r[2] = s[1]
        r[2] =~ /[0-9]+?\s(.+)/
        s=$1
        puts "DEBUG: == BFK: MX Parsing Strip: Answer: " + r[2] + " : mod: " + s if @debug
        r[2] = s
          
          ######### FIX BLANKS FOR MX
          
      end
      res << PDNSResult.new('BFK',response_time,r[0],r[2],r[1])
    end
  end
  res
rescue Exception => e
  $stderr.puts "BFKClient Exception: #{e}"
  raise e
end