Module: Datadog::AppSec::Contrib::Rails::Gateway::Watcher

Defined in:
lib/datadog/appsec/contrib/rails/gateway/watcher.rb

Overview

Watcher for Rails gateway events

Class Method Summary collapse

Class Method Details

.watch ⇒ Object 



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# File 'lib/datadog/appsec/contrib/rails/gateway/watcher.rb', line 16

def watch
  gateway = Instrumentation.gateway

  watch_request_action(gateway)
end

.watch_request_action(gateway = Instrumentation.gateway) ⇒ Object 



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# File 'lib/datadog/appsec/contrib/rails/gateway/watcher.rb', line 22

def watch_request_action(gateway = Instrumentation.gateway)
  gateway.watch('rails.request.action', :appsec) do |stack, gateway_request|
    event = nil
    context = gateway_request.env[Datadog::AppSec::Ext::CONTEXT_KEY]
    engine = AppSec::Reactive::Engine.new

    Rails::Reactive::Action.subscribe(engine, context) do |result|
      if result.status == :match
        # TODO: should this hash be an Event instance instead?
        event = {
          waf_result: result,
          trace: context.trace,
          span: context.span,
          request: gateway_request,
          actions: result.actions
        }

        # We want to keep the trace in case of security event
        context.trace.keep! if context.trace
        Datadog::AppSec::Event.tag_and_keep!(context, result)
        context.waf_runner.events << event
      end
    end

    block = Rails::Reactive::Action.publish(engine, gateway_request)
    next [nil, [[:block, event]]] if block

    stack.call(gateway_request.request)
  end
end