Class: Charon::Resolver

Inherits:
Object
  • Object
show all
Defined in:
lib/charon/resolver.rb

Class Method Summary collapse

Class Method Details

.fix_name(name) ⇒ Object 



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# File 'lib/charon/resolver.rb', line 14

def self.fix_name(name)
  # reverse ip address
  if is_address? name
    name.split(".").reverse.join(".")
  # remove www.
  else
    tld = Charon::TLDS.select {|v| name =~ /#{v}$/}
    tld_size = tld.size > 0 ? tld.last.split(".").size : 1
    name.split(".")[-1-(tld_size)..-1].join(".")
  end
end

.is_address?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/charon/resolver.rb', line 10

def self.is_address?(name)
  name =~ Resolv::IPv4::Regex ? true : false
end

.query(name) ⇒ Object 



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# File 'lib/charon/resolver.rb', line 26

def self.query(name)
  name = self.fix_name name
  
  begin
    records = self.resolver.getresources( "#{name}.zen.spamhaus.org", Resolv::DNS::Resource::IN::A )
  rescue Resolv::ResolvError => e
    records = []
  end

  code = nil
  list = nil

  unless records.empty?
    code = records.first.address.to_s.split('.').last.to_i
    list = case code
           when 10..11
             'Policy Block List'
           when 4..7
             'Exploits Block List'
           when 3
             'CSS Component'
           when 2
             'Block List'
           else
             'Unknown List'
           end
  end
  
  code.nil? ? nil : [ code, list ]
end

.resolver ⇒ Object 



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# File 'lib/charon/resolver.rb', line 6

def self.resolver
  @@resolver ||= Resolv::DNS.new
end