114 lines
3.6 KiB
Ruby
114 lines
3.6 KiB
Ruby
# frozen_string_literal: true
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module Spam
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class SpamVerdictService
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include AkismetMethods
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include SpamConstants
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def initialize(user:, target:, options:, context: {})
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@target = target
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@user = user
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@options = options
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@context = context
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end
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def execute
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spamcheck_result = nil
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spamcheck_attribs = {}
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spamcheck_error = false
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external_spam_check_round_trip_time = Benchmark.realtime do
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spamcheck_result, spamcheck_attribs, spamcheck_error = spamcheck_verdict
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end
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label = spamcheck_error ? 'ERROR' : spamcheck_result.to_s.upcase
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histogram.observe( { result: label }, external_spam_check_round_trip_time )
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# assign result to a var for logging it before reassigning to nil when monitorMode is true
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original_spamcheck_result = spamcheck_result
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spamcheck_result = nil if spamcheck_attribs&.fetch("monitorMode", "false") == "true"
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akismet_result = akismet_verdict
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# filter out anything we don't recognise, including nils.
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valid_results = [spamcheck_result, akismet_result].compact.select { |r| SUPPORTED_VERDICTS.key?(r) }
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# Treat nils - such as service unavailable - as ALLOW
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return ALLOW unless valid_results.any?
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# Favour the most restrictive result.
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verdict = valid_results.min_by { |v| SUPPORTED_VERDICTS[v][:priority] }
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# The target can override the verdict via the `allow_possible_spam` feature flag
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verdict = OVERRIDE_VIA_ALLOW_POSSIBLE_SPAM if override_via_allow_possible_spam?(verdict: verdict)
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logger.info(class: self.class.name,
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akismet_verdict: akismet_verdict,
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spam_check_verdict: original_spamcheck_result,
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extra_attributes: spamcheck_attribs,
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spam_check_rtt: external_spam_check_round_trip_time.real,
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final_verdict: verdict,
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username: user.username,
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user_id: user.id,
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target_type: target.class.to_s,
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project_id: target.project_id
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)
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verdict
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end
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private
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attr_reader :user, :target, :options, :context
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def akismet_verdict
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if akismet.spam?
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Gitlab::Recaptcha.enabled? ? CONDITIONAL_ALLOW : DISALLOW
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else
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ALLOW
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end
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end
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def spamcheck_verdict
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return unless Gitlab::CurrentSettings.spam_check_endpoint_enabled
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begin
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result, attribs, _error = spamcheck_client.issue_spam?(spam_issue: target, user: user, context: context)
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# @TODO log if error is not nil https://gitlab.com/gitlab-org/gitlab/-/issues/329545
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return [nil, attribs] unless result
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[result, attribs]
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rescue StandardError => e
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Gitlab::ErrorTracking.log_exception(e)
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# Default to ALLOW if any errors occur
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[ALLOW, attribs, true]
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end
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end
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def override_via_allow_possible_spam?(verdict:)
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# If the verdict is already going to allow (because current verdict's priority value is greater
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# than the override verdict's priority value), then we don't need to override it.
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return false if SUPPORTED_VERDICTS[verdict][:priority] > SUPPORTED_VERDICTS[OVERRIDE_VIA_ALLOW_POSSIBLE_SPAM][:priority]
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target.allow_possible_spam?
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end
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def spamcheck_client
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@spamcheck_client ||= Gitlab::Spamcheck::Client.new
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end
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def logger
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@logger ||= Gitlab::AppJsonLogger.build
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end
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def histogram
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@histogram ||= Gitlab::Metrics.histogram(:gitlab_spamcheck_request_duration_seconds, 'Request duration to the anti-spam service')
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end
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end
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end
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