class
Resolv is a thread-aware DNS resolver library written in Ruby. Resolv can handle multiple DNS requests concurrently without blocking the entire ruby interpreter.
See also resolv-replace.rb to replace the libc resolver with Resolv.
Resolv can look up various DNS resources using the DNS module directly.
Examples:
p Resolv.getaddress "www.ruby-lang.org" p Resolv.getname "210.251.121.214" Resolv::DNS.open do |dns| ress = dns.getresources "www.ruby-lang.org", Resolv::DNS::Resource::IN::A p ress.map { |r| r.address } ress = dns.getresources "ruby-lang.org", Resolv::DNS::Resource::IN::MX p ress.map { |r| [r.exchange.to_s, r.preference] } end
Bugs
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NIS is not supported.
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/etc/nsswitch.conf is not supported.
Constants
DefaultResolver = self.new
AddressRegex = /(?:#{IPv4::Regex})|(?:#{IPv6::Regex})/