Class: SPF::Record

Inherits:
Object
  • Object
show all
Defined in:
lib/spf/model.rb,
lib/spf/model.rb

Direct Known Subclasses

V1, V2

Defined Under Namespace

Classes: V1, V2

Constant Summary collapse

DEFAULT_QUALIFIER = 
'+'
RESULTS_BY_QUALIFIER = 
{
  ''  => :pass,
  '+' => :pass,
  '-' => :fail,
  '~' => :softfail,
  '?' => :neutral
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Record

Returns a new instance of Record.



781
782
783
784
785
786
787
788
789
 
# File 'lib/spf/model.rb', line 781

def initialize(options)
  super()
  @parse_text       = (@text = options[:text] if not self.instance_variable_defined?(:@parse_text)).dup
  @terms          ||= []
  @global_mods    ||= {}
  @errors           = []
  @ip_netblocks     = []
  @raise_exceptions = options.has_key?(:raise_exceptions) ? options[:raise_exceptions] : true
end

Instance Attribute Details

#errors ⇒ Object (readonly)

Returns the value of attribute errors.



771
772
773
 
# File 'lib/spf/model.rb', line 771

def errors
  @errors
end

#terms ⇒ Object (readonly)

Returns the value of attribute terms.



771
772
773
 
# File 'lib/spf/model.rb', line 771

def terms
  @terms
end

#text ⇒ Object (readonly)

Returns the value of attribute text.



771
772
773
 
# File 'lib/spf/model.rb', line 771

def text
  @text
end

Class Method Details

.new_from_string(text, options = {}) ⇒ Object 



791
792
793
794
795
796
 
# File 'lib/spf/model.rb', line 791

def self.new_from_string(text, options = {})
  options[:text] = text
  record = new(options)
  record.parse
  return record
end

Instance Method Details

#error(exception) ⇒ Object 



798
799
800
801
 
# File 'lib/spf/model.rb', line 798

def error(exception)
  raise exception if @raise_exceptions
  @errors << exception
end

#eval(server, request, want_result = true) ⇒ Object

Raises:



913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
 
# File 'lib/spf/model.rb', line 913

def eval(server, request, want_result = true)
  raise SPF::OptionRequiredError.new('SPF server object required for record evaluation') unless server
  raise SPF::OptionRequiredError.new('Request object required for record evaluation')    unless request
  begin
    @terms.each do |term|
      if SPF::Mech === term
        # Term is a mechanism.
        mech = term
        if mech.match(server, request, request.ip_address != nil)
          result_name = RESULTS_BY_QUALIFIER[mech.qualifier]
          result_class = server.result_class(result_name)
          result = result_class.new([server, request, "Mechanism '#{term}' matched"])
          mech.explain(server, request, result)
          raise result if want_result
        end
      elsif SPF::PositionalMod === term
        # Term is a positional modifier.
        mod = term
        mod.process(server, request)
      elsif SPF::UnknownMod === term
        # Term is an unknown modifier.  Ignore it (RFC 4408, 6/3).
      else
        # Invalid term object encountered:
        error(SPF::UnexpectedTermObjectError.new("Unexpected term object '#{term}' encountered."))
      end
    end
  rescue SPF::Result => result
    # Process global modifiers in ascending order of precedence:
    @global_mods.each do |global_mod|
      global_mod.process(server, request, result)
    end
    raise result if want_result
  end
end

#global_mod(mod_name) ⇒ Object 



905
906
907
 
# File 'lib/spf/model.rb', line 905

def global_mod(mod_name)
  return @global_mods[mod_name]
end

#global_mods ⇒ Object 



901
902
903
 
# File 'lib/spf/model.rb', line 901

def global_mods
  return @global_mods.values.sort {|a,b| a.precedence <=> b.precedence }
end

#ip_netblocks ⇒ Object 



803
804
805
806
 
# File 'lib/spf/model.rb', line 803

def ip_netblocks
  @ip_netblocks.flatten!
  return @ip_netblocks
end

#parse ⇒ Object 



808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
 
# File 'lib/spf/model.rb', line 808

def parse
  unless self.instance_variable_defined?(:@parse_text) and @parse_text
    error(SPF::NothingToParseError.new('Nothing to parse for record'))
    return
  end
  self.parse_version_tag
  while @parse_text.length > 0
    term = nil
    begin
      term = self.parse_term
    rescue SPF::Error => e
      term.errors << e if term
      @errors     << e
      raise if @raise_exceptions
      return if SPF::JunkInRecordError === e
    end
  end
end

#parse_term ⇒ Object 



835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
 
# File 'lib/spf/model.rb', line 835

def parse_term
  regex = /
    ^
    (
      #{SPF::Mech::QUALIFIER_PATTERN}?
      (#{SPF::Mech::NAME_PATTERN})
      [^\x20]*
    )
    (?: \x20+ | $ )
  /x

  term = nil
  if @parse_text.sub!(regex, '') and $&
    # Looks like a mechanism:
    mech_text  = $1
    mech_name  = $2.downcase
    mech_class = self.mech_classes[mech_name.to_sym]
    exception  = nil
    unless mech_class
      exception = SPF::InvalidMech.new("Unknown mechanism type '#{mech_name}' in '#{@version_tag}' record")
      error(exception)
      mech_class = SPF::Mech
    end
    term = mech = mech_class.new_from_string(mech_text, {:raise_exceptions => @raise_exceptions})
    term.errors << exception if exception
    @ip_netblocks << mech.ip_netblocks if mech.ip_netblocks
    @terms << mech
    if mech_class == SPF::Mech
      raise SPF::InvalidMechError.new("Unknown mechanism type '#{mech_name}' in '#{@version_tag}' record")
    end
  elsif (
    @parse_text.sub!(/
      ^
      (
        (#{SPF::Mod::NAME_PATTERN}) =
        [^\x20]*
      )
      (?: \x20+ | $ )
    /x, '') and $&
  )
    # Looks like a modifier:
    mod_text  = $1
    mod_name  = $2.downcase
    mod_class = self.class::MOD_CLASSES[mod_name.to_sym] || SPF::UnknownMod
    if mod_class
      # Known modifier.
      term = mod = mod_class.new_from_string(mod_text, {:raise_exceptions => @raise_exceptions})
      if SPF::GlobalMod === mod
        # Global modifier.
        if @global_mods[mod_name]
          raise SPF::DuplicateGlobalMod.new("Duplicate global modifier '#{mod_name}' encountered")
        end
        @global_mods[mod_name] = mod
      elsif SPF::PositionalMod === mod
        # Positional modifier, queue normally:
        @terms << mod
      end
    end

  else
    raise SPF::JunkInRecordError.new("Junk encountered in record '#{@text}'")
  end
  @errors.concat(term.errors)
  return term
end

#parse_version_tag ⇒ Object 



827
828
829
830
831
832
833
 
# File 'lib/spf/model.rb', line 827

def parse_version_tag
  @parse_text.sub!(/^#{self.version_tag_pattern}\s+/ix, '')
  unless $1
    raise SPF::InvalidRecordVersionError.new(
      "Not a '#{self.version_tag}' record: '#{@text}'")
  end
end

#to_s ⇒ Object 



909
910
911
 
# File 'lib/spf/model.rb', line 909

def to_s
  return [version_tag, @terms, @global_mods].join(' ')
end