Module: Datadog::Lambda::AppSec

Defined in:
lib/datadog/lambda/appsec.rb,
lib/datadog/lambda/appsec/request.rb,
lib/datadog/lambda/appsec/tagging.rb,
lib/datadog/lambda/appsec/response.rb,
lib/datadog/lambda/appsec/event_normalizer.rb,
lib/datadog/lambda/appsec/response_normalizer.rb

Overview

AppSec integration for AWS Lambda invocations.

Defined Under Namespace

Modules: EventNormalizer, ResponseNormalizer, Tagging Classes: Request, Response

Class Method Summary collapse

Class Method Details

.catch_interrupt ⇒ Object

rubocop:enable Metrics/AbcSize, Metrics/MethodLength, Metrics/CyclomaticComplexity



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# File 'lib/datadog/lambda/appsec.rb', line 88

def catch_interrupt
  interrupt_params = catch(Datadog::AppSec::Ext::INTERRUPT) { return yield }

  if (context = Datadog::AppSec::Context.active)
    context.mark_as_interrupted!
  end

  response_override(interrupt_params, headers: @request.headers)
end

.on_finish(response) ⇒ Object

rubocop:disable Metrics/AbcSize, Metrics/MethodLength, Metrics/CyclomaticComplexity



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# File 'lib/datadog/lambda/appsec.rb', line 50

def on_finish(response)
  return unless enabled?

  context = Datadog::AppSec::Context.active
  return unless context

  normalized = ResponseNormalizer.normalize(response)
  response = Response.from_normalized(normalized)

  interrupt_params = nil
  unless context.interrupted?
    Tagging.tag_response(response, context: context)
    payload = Datadog::AppSec::Instrumentation::Gateway::DataContainer.new(
      normalized, context: context
    )

    interrupt_params = catch(Datadog::AppSec::Ext::INTERRUPT) do
      Datadog::AppSec::Instrumentation.gateway.push('aws_lambda.response.start', payload)
      nil
    end

    context.mark_as_interrupted! if interrupt_params
  end

  extract_api_security_schema(context, request: @request, response: response)

  Datadog::AppSec::Event.record(context, request: @request)
  context.export_metrics
  context.export_request_telemetry

  response_override(interrupt_params, headers: @request.headers) if interrupt_params
rescue StandardError => e
  Datadog::Utils.logger.debug "failed to finish AppSec: #{e}"
ensure
  Datadog::AppSec::Context.deactivate if context
end

.on_start(event, trace:, span:, cold_start: false) ⇒ Object

rubocop:disable Metrics/AbcSize, Metrics/MethodLength



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# File 'lib/datadog/lambda/appsec.rb', line 17

def on_start(event, trace:, span:, cold_start: false)
  @request = nil
  return unless enabled?

  context = create_context(trace, span)
  return unless Datadog::AppSec::Context.active

  Tagging.tag_and_keep(context, cold_start: cold_start)

  event = EventNormalizer.normalize(event)
  @request = Request.from_normalized(event)

  Tagging.tag_request(@request, context: context)
  payload = Datadog::AppSec::Instrumentation::Gateway::DataContainer.new(
    event, context: context
  )

  interrupt_params = catch(Datadog::AppSec::Ext::INTERRUPT) do
    Datadog::AppSec::Instrumentation.gateway.push('aws_lambda.request.start', payload)
    nil
  end

  return unless interrupt_params

  context.mark_as_interrupted!
  response_override(interrupt_params, headers: @request.headers)
rescue StandardError => e
  Datadog::AppSec::Context.deactivate if context
  Datadog::Utils.logger.debug("failed to start AppSec: #{e}")
end