Encode IDNs with punycode before trying to resolve them

via the adressable gem

Author: z2s8

celluloid-dns.gemspec

@@ -26,6 +26,7 @@ Gem::Specification.new do |spec|
 	spec.add_dependency("celluloid", "~> 0.17.3")
 	spec.add_dependency("celluloid-io", "~> 0.17.3")
 	spec.add_dependency("timers", "~> 4.1.0")
+	spec.add_dependency("addressable", "~> 2.4.0")
 
 	spec.add_development_dependency "bundler", "~> 1.3"
 	spec.add_development_dependency "process-daemon", "~> 1.0.0"

lib/celluloid/dns/resolver.rb

@@ -22,6 +22,7 @@
 
 require 'securerandom'
 require 'celluloid/io'
+require 'addressable'
 
 module Celluloid::DNS
 	class InvalidProtocolError < StandardError
@@ -71,6 +72,7 @@ def fully_qualified_name(name)
 			end
 
 			# ..else if we have a string, we need to do some basic processing:
+			name = Addressable::IDNA.to_ascii(name) unless name.ascii_only?
 			if name.end_with? '.'
 				return Resolv::DNS::Name.create(name)
 			else