Class: MonoVM::Whois::Availability::Rules::ServerRefusal

Inherits:
MonoVM::Whois::Availability::Rule show all
Defined in:
lib/monovm/whois/availability/rules/server_refusal.rb

Overview

The server answered, but declined to say anything about the domain.

First in the chain, and that position is the point. Rate-limit notices, "your client is blocked" messages and "port 43 is retired, use RDAP" banners contain none of the wording that means "registered", so every later rule passes on them and the response eventually reaches whichever heuristic is loosest. In a permissive detector that heuristic answers "available", which means a rate-limited registry reports its entire zone as free to register.

Deciding this first, and deciding it :unknown, is what makes the rest of the chain safe to be permissive.

Instance Method Summary collapse

Methods inherited from MonoVM::Whois::Availability::Rule

#name

Instance Method Details

#call(context) ⇒ Object 



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# File 'lib/monovm/whois/availability/rules/server_refusal.rb', line 22

def call(context)
  return nil if context.empty?

  # An RDAP document says "I refuse" structurally — an HTTP 401/403/429,
  # which the transport turns into an error, or an +errorCode+, which
  # {RdapObject} reads. Its prose must not be scanned for refusal wording,
  # because registries embed rate-limit *policy* in the Terms of Service
  # notice attached to every answer: PIR's .org responses explain that a
  # client sending "too many queries" will be throttled, and matching that
  # reported every unregistered .org name as unknown.
  return nil unless context.json.nil?

  matched = context.find(Patterns::REFUSAL)
  return nil if matched.nil?

  unknown(
    reason: "the server refused to answer the query",
    evidence: matched
  )
end