Resolv

< Object 6 instance methods 7 class methods

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:

Example

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(&:address)
  ress = dns.getresources "ruby-lang.org", Resolv::DNS::Resource::IN::MX
  p ress.map { |r| [r.exchange.to_s, r.preference] }
end

Bugs

NIS is not supported.
/etc/nsswitch.conf is not supported.

Class methods 7

.each_address .each_name .getaddress .getaddresses .getname .getnames .new

Instance methods 6

#each_address #each_name #getaddress #getaddresses #getname #getnames

Constants

AddressRegex

Address Regexp to use for matching IP addresses.

DefaultResolver

Default resolver to use for Resolv class methods.

VERSION

The version string