Module: FetchUtil::Regulatory::Robots

Included in:
FetchUtil::Regulatory
Defined in:
lib/fetch_util/regulatory/robots.rb

Constant Summary collapse

ROBOT_DIRECTIVES = 
%w[
  all
  follow
  index
  indexifembedded
  max-image-preview
  max-snippet
  max-video-preview
  noai
  noarchive
  nocache
  nofollow
  noimageai
  noimageindex
  noindex
  none
  nosnippet
  notranslate
  unavailable_after
].freeze

Instance Method Summary collapse

Instance Method Details

#extract_robots_source_signals(body) ⇒ Object 



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# File 'lib/fetch_util/regulatory/robots.rb', line 39

def extract_robots_source_signals(body)
  signals = {
    "robotstxt" => [],
    "contentsignal" => [],
    "contentusagerobots" => []
  }
  user_agents = []
  in_rules = false

  body.to_s.gsub("\r\n", "\n").gsub("\r", "\n").each_line do |line|
    content = line.sub(/\s*#.*\z/, "").strip
    next if content.empty?

    field, value = content.split(":", 2)
    next unless value

    field = field.strip.downcase
    value = value.strip

    case field
    when "user-agent"
      user_agents = [] if in_rules
      in_rules = false
      user_agents << value unless value.empty?
    when "allow", "disallow"
      next if user_agents.empty?

      in_rules = true
      user_agents.each do |user_agent|
        signals["robotstxt"] << robot_signal(field, user_agent, value)
      end
    when "content-signal"
      next if user_agents.empty?

      in_rules = true
      user_agents.each do |user_agent|
        signals["contentsignal"].concat(extract_content_signal_signals(value, user_agent: user_agent))
      end
    when "content-usage"
      next if user_agents.empty?

      in_rules = true
      user_agents.each do |user_agent|
        signals["contentusagerobots"].concat(extract_content_usage_robot_signals(value, user_agent: user_agent))
      end
    end
  end

  signals
end

#robots_record(requested_uri) ⇒ Object 



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# File 'lib/fetch_util/regulatory/robots.rb', line 26

def robots_record(requested_uri)
  fetch_record("robotstxt:#{origin_key(requested_uri)}", robots_uri(requested_uri), fallback: empty_robots_record) do |body|
    payload = extract_robots_source_signals(body)
    {
      "signals" => {
        "robotstxt" => sort_robot_signals(payload["robotstxt"]),
        "contentsignal" => sort_usage_preference_signals(payload["contentsignal"]),
        "contentusagerobots" => sort_usage_preference_signals(payload["contentusagerobots"])
      }
    }
  end
end