Class Resolv::DNS::Name
In: lib/resolv.rb
Parent: Object

A representation of a DNS name.

Methods

absolute?   create   subdomain_of?   to_s  

External Aliases

== -> eql?

Public Class methods

create(arg)

Creates a new DNS name from arg. arg can be:

Name:returns arg.
String:Creates a new Name.

[Source]

      # File lib/resolv.rb, line 1053
1053:       def self.create(arg)
1054:         case arg
1055:         when Name
1056:           return arg
1057:         when String
1058:           return Name.new(Label.split(arg), /\.\z/ =~ arg ? true : false)
1059:         else
1060:           raise ArgumentError.new("cannot interpret as DNS name: #{arg.inspect}")
1061:         end
1062:       end

Public Instance methods

absolute?()

True if this name is absolute.

[Source]

      # File lib/resolv.rb, line 1076
1076:       def absolute?
1077:         return @absolute
1078:       end
subdomain_of?(other)

Returns true if other is a subdomain.

Example: 

  domain = Resolv::DNS::Name.create("y.z")
  p Resolv::DNS::Name.create("w.x.y.z").subdomain_of?(domain) #=> true
  p Resolv::DNS::Name.create("x.y.z").subdomain_of?(domain) #=> true
  p Resolv::DNS::Name.create("y.z").subdomain_of?(domain) #=> false
  p Resolv::DNS::Name.create("z").subdomain_of?(domain) #=> false
  p Resolv::DNS::Name.create("x.y.z.").subdomain_of?(domain) #=> false
  p Resolv::DNS::Name.create("w.z").subdomain_of?(domain) #=> false

[Source]

      # File lib/resolv.rb, line 1101
1101:       def subdomain_of?(other)
1102:         raise ArgumentError, "not a domain name: #{other.inspect}" unless Name === other
1103:         return false if @absolute != other.absolute?
1104:         other_len = other.length
1105:         return false if @labels.length <= other_len
1106:         return @labels[-other_len, other_len] == other.to_a
1107:       end
to_s()

returns the domain name as a string.

The domain name doesn‘t have a trailing dot even if the name object is absolute.

Example: 

  p Resolv::DNS::Name.create("x.y.z.").to_s #=> "x.y.z"
  p Resolv::DNS::Name.create("x.y.z").to_s #=> "x.y.z"

[Source]

      # File lib/resolv.rb, line 1136
1136:       def to_s
1137:         return @labels.join('.')
1138:       end

[Validate]