Class: Puffy::Resolver

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/puffy/resolver.rb

Overview

DNS resolution class.

Instance Method Summary collapse

Instance Method Details

#resolv(hostname, address_family = nil) ⇒ Array<IPAddr>

Resolve hostname and return an Array of IPAddr.

Examples:

Resolver.instance.resolv('localhost')
#=> [#<IPAddr:[::1]>, #<IPAddr:127.0.0.1>]
Resolver.instance.resolv('localhost', :inet)
#=> [#<IPAddr:127.0.0.1>]
Resolver.instance.resolv('localhost', :inet6)
#=> [#<IPAddr:[::1]>]

Parameters:

  • hostname (String) —

    The hostname to resolve

  • address_family (Symbol) (defaults to: nil) —

    if set, limit search to address_family, :inet or :inet6

Returns:



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# File 'lib/puffy/resolver.rb', line 25

def resolv(hostname, address_family = nil)
  if hostname.is_a?(IPAddr)
    resolv_ipaddress(hostname, address_family)
  else
    resolv_hostname(hostname, address_family)
  end
end

#resolv_apt_mirror(url) ⇒ Object 



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# File 'lib/puffy/resolver.rb', line 46

def resolv_apt_mirror(url)
  res = []
  http_url = url.sub(%r{^mirror(\+http)?://}, 'http://')
  res << parse_url(http_url)

  URI.parse(http_url).open do |document|
    document.each_line do |line|
      res << parse_url(line)
    end
  end
  res
end

#resolv_srv(service) ⇒ Array<Hash>

Resolve the SRV record for service and return its target and port.

Examples:

Resolver.instance.resolv_srv('_http._tcp.deb.debian.org')
#=> [{ host: 'debian.map.fastlydns.net.', port: 80 }]

Parameters:

  • service (String) —

    The service to resolve

Returns:



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# File 'lib/puffy/resolver.rb', line 41

def resolv_srv(service)
  proto = service.split('.')[1][1..-1].to_sym
  @dns.getresources(service, Resolv::DNS::Resource::IN::SRV).collect { |r| { host: r.target.to_s, port: r.port, proto_hint: proto } }.sort
end