Class: EventMachine::DNSBL::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/eventmachine/dnsbl/client.rb

Overview

Lookup actually handles the sending of queries to a recursive DNS server and places any replies into DNSBLResults

Constant Summary collapse

@@config = 
EventMachine::DNSBL::Defaults.config
@@tlds_2l = 
EventMachine::DNSBL::Defaults.tlds_2l
@@tlds_3l = 
EventMachine::DNSBL::Defaults.tlds_3l
@@requests = 
Array.new

Class Method Summary collapse

Class Method Details

.blacklisted?(answers) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/eventmachine/dnsbl/client.rb', line 97

def self.blacklisted?(answers)
  answers.find {|a| a.meaning } != nil
end

.check(item, &cback) ⇒ Object 



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# File 'lib/eventmachine/dnsbl/client.rb', line 62

def self.check(item, &cback)
  itemtype = (item =~ /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/) ? :ip : :domain
  label = (itemtype == :ip) ? item.split(/\./).reverse.join(".") : normalize(item)
  answers = Array.new
  count = 0
  @@config.each do |dnsblname, options|
    if options[:type] == itemtype and not options[:disabled]
      count += 1
      starttime = Time.now.to_f
      lookup = "#{label}.#{options[:domain]}"
      d = EM::DNS::Resolver.resolve lookup
      d.errback {
        answers << DNSBLResult.new(dnsblname, item, lookup, nil, nil, Time.now.to_f - starttime)
        if answers.length == count and cback
          cback.call(answers)
        end
      }
      d.callback { |r|
        res = nil
        meaning = nil
        if r.length > 0
          res = r.join(",")
          meaning = r.map {|answer|
            options[answer] || answer
          }.join(",")
        end
        answers << DNSBLResult.new(dnsblname, item, lookup, res, meaning, Time.now.to_f - starttime)
        if answers.length == count and cback
          cback.call(answers)
        end
      }
    end
  end
end

.config(config = nil) ⇒ Object 



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# File 'lib/eventmachine/dnsbl/client.rb', line 24

def self.config(config = nil)
  if config
    @@config = config
  end
  @@config
end

.normalize(domain) ⇒ Object

Converts a hostname to the domain: e.g., www.google.com => google.com, science.somewhere.co.uk => somewhere.co.uk



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# File 'lib/eventmachine/dnsbl/client.rb', line 46

def self.normalize(domain)
  			# strip off the protocol (\w{1,20}://), the URI (/), parameters (?), port number (:), and username (.*@)
  			# then split into parts via the .
  			parts = domain.gsub(/^\w{1,20}:\/\//,'').gsub(/[\/\?\:].*/,'').gsub(/.*?\@/,'').split(/\./)
  			# grab the last two parts of the domain
  			dom = parts[-2,2].join(".")
  			# if the dom is in the two_level_tld list, then use three parts
  			if @@tlds_2l.index(dom)
dom = parts[-3,3].join(".")
  			end
  			if @@tlds_3l.index(dom)
dom = parts[-4,4].join(".")
  			end
  			dom
end

.three_level_tlds(three_level_tlds = nil) ⇒ Object 



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# File 'lib/eventmachine/dnsbl/client.rb', line 38

def self.three_level_tlds(three_level_tlds = nil)
  if three_level_tlds
    @@tlds_3l = three_level_tlds
  end
  @@tlds_3l
end

.two_level_tlds(two_level_tlds = nil) ⇒ Object 



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# File 'lib/eventmachine/dnsbl/client.rb', line 31

def self.two_level_tlds(two_level_tlds = nil)
  if two_level_tlds
    @@tlds_2l = two_level_tlds
  end
  @@tlds_2l
end