Module: Datadog::AppSec::Processor::RuleMerger

Defined in:
lib/datadog/appsec/processor/rule_merger.rb

Overview

RuleMerger merge different sources of information into the rules payload

Defined Under Namespace

Classes: RuleVersionMismatchError

Class Method Summary collapse

Class Method Details

.default_waf_processors ⇒ Object 



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# File 'lib/datadog/appsec/processor/rule_merger.rb', line 66

def default_waf_processors
  @default_waf_processors ||= JSON.parse(Datadog::AppSec::Assets.waf_processors)
end

.default_waf_scanners ⇒ Object 



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# File 'lib/datadog/appsec/processor/rule_merger.rb', line 70

def default_waf_scanners
  @default_waf_scanners ||= JSON.parse(Datadog::AppSec::Assets.waf_scanners)
end

.merge(telemetry:, rules:, data: [], overrides: [], exclusions: [], custom_rules: [], processors: nil, scanners: nil) ⇒ Object

TODO: ‘processors` and `scanners` are not provided by the caller, consider removing them



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# File 'lib/datadog/appsec/processor/rule_merger.rb', line 23

def merge(
  telemetry:,
  rules:, data: [], overrides: [], exclusions: [], custom_rules: [],
  processors: nil, scanners: nil
)
  processors ||= begin
    default_waf_processors
  rescue StandardError => e
    Datadog.logger.error("libddwaf rulemerger failed to parse default waf processors. Error: #{e.inspect}")
    telemetry.report(
      e,
      description: 'libddwaf rulemerger failed to parse default waf processors'
    )
    []
  end

  scanners ||= begin
    default_waf_scanners
  rescue StandardError => e
    Datadog.logger.error("libddwaf rulemerger failed to parse default waf scanners. Error: #{e.inspect}")
    telemetry.report(
      e,
      description: 'libddwaf rulemerger failed to parse default waf scanners'
    )
    []
  end

  combined_rules = combine_rules(rules)

  combined_data = combine_data(data) if data.any?
  combined_overrides = combine_overrides(overrides) if overrides.any?
  combined_exclusions = combine_exclusions(exclusions) if exclusions.any?
  combined_custom_rules = combine_custom_rules(custom_rules) if custom_rules.any?

  combined_rules['rules_data'] = combined_data if combined_data
  combined_rules['rules_override'] = combined_overrides if combined_overrides
  combined_rules['exclusions'] = combined_exclusions if combined_exclusions
  combined_rules['custom_rules'] = combined_custom_rules if combined_custom_rules
  combined_rules['processors'] = processors
  combined_rules['scanners'] = scanners
  combined_rules
end