Module: HTTPX::Resolver

Extended by:
Resolver
Included in:
Resolver
Defined in:
lib/httpx/resolver.rb,
lib/httpx/resolver/cache.rb,
lib/httpx/resolver/entry.rb

Defined Under Namespace

Modules: Cache Classes: Entry, HTTPS, Multi, Native, Resolver, System

Constant Summary collapse

RESOLVE_TIMEOUT = 
[2, 3].freeze

Instance Method Summary collapse

Instance Method Details

#decode_dns_answer(payload) ⇒ Object 



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

def decode_dns_answer(payload)
  begin
    message = Resolv::DNS::Message.decode(payload)
  rescue Resolv::DNS::DecodeError => e
    return :decode_error, e
  end

  # no domain was found
  return :no_domain_found if message.rcode == Resolv::DNS::RCode::NXDomain

  return :message_truncated if message.tc == 1

  if message.rcode != Resolv::DNS::RCode::NoError
    case message.rcode
    when Resolv::DNS::RCode::ServFail
      return :retriable_error, message.rcode
    else
      return :dns_error, message.rcode
    end
  end

  addresses = []

  now = Utils.now
  message.each_answer do |question, _, value|
    case value
    when Resolv::DNS::Resource::IN::CNAME
      addresses << {
        "name" => question.to_s,
        "TTL" => (now + value.ttl),
        "alias" => value.name.to_s,
      }
    when Resolv::DNS::Resource::IN::A,
         Resolv::DNS::Resource::IN::AAAA
      addresses << {
        "name" => question.to_s,
        "TTL" => (now + value.ttl),
        "data" => value.address.to_s,
      }
    end
  end

  [:ok, addresses]
end

#encode_dns_query(hostname, type: Resolv::DNS::Resource::IN::A, message_id: generate_id) ⇒ Object 



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# File 'lib/httpx/resolver.rb', line 39

def encode_dns_query(hostname, type: Resolv::DNS::Resource::IN::A, message_id: generate_id)
  Resolv::DNS::Message.new(message_id).tap do |query|
    query.rd = 1
    query.add_question(hostname, type)
  end.encode
end

#generate_id ⇒ Object 



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# File 'lib/httpx/resolver.rb', line 30

def generate_id
  if Utils.in_ractor?
    identifier = Ractor.store_if_absent(:httpx_resolver_identifier) { -1 }
    Ractor.current[:httpx_resolver_identifier] = (identifier + 1) & 0xFFFF
  else
    id_synchronize { @identifier = (@identifier + 1) & 0xFFFF }
  end
end

#supported_ip_families ⇒ Object 



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# File 'lib/httpx/resolver.rb', line 22

def supported_ip_families
  if Utils.in_ractor?
    Ractor.store_if_absent(:httpx_supported_ip_families) { find_supported_ip_families }
  else
    @supported_ip_families ||= find_supported_ip_families
  end
end