Module: Legion::LLM::API::Auth

Extended by:
Legion::Logging::Helper
Defined in:
lib/legion/llm/api/auth.rb

Class Method Summary collapse

Class Method Details

.registered(app) ⇒ Object 



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# File 'lib/legion/llm/api/auth.rb', line 11

def self.registered(app)
  log.debug('[llm][api][auth] registering /v1/* before filter')

  app.before '/v1/*' do
    log.debug("[llm][api][auth] before filter action=check path=#{request.path_info}")
    next unless auth_enabled?

    token = extract_token(request)
    log.debug("[llm][api][auth] action=validate token_present=#{!token.nil?}")

    unless valid_token?(token)
      log.warn("[llm][api][auth] action=rejected reason=invalid_token path=#{request.path_info}")
      halt 401, { 'Content-Type' => 'application/json' },
           Legion::JSON.dump({ error: { message: 'Invalid API key', type: 'authentication_error' } })
    end

    log.debug("[llm][api][auth] action=authorized path=#{request.path_info}")
  end

  app.helpers do
    define_method(:auth_enabled?) do
      Legion::LLM.settings.dig(:api, :auth, :enabled) == true
    end

    define_method(:extract_token) do |req|
      auth_header = req.env['HTTP_AUTHORIZATION']
      if auth_header&.match?(/\ABearer\s+/i)
        log.debug('[llm][api][auth] token_source=bearer_header')
        return auth_header.sub(/\ABearer\s+/i, '')
      end

      key = req.env['HTTP_X_API_KEY']
      log.debug("[llm][api][auth] token_source=x_api_key present=#{!key.nil?}")
      key
    end

    define_method(:valid_token?) do |token|
      return true unless auth_enabled?
      return false if token.nil? || token.empty?

      keys = Legion::LLM.settings.dig(:api, :auth, :api_keys) || []
      keys.include?(token)
    end
  end

  log.debug('[llm][api][auth] /v1/* before filter registered')
rescue StandardError => e
  handle_exception(e, level: :error, handled: false, operation: 'llm.api.auth.register')
end