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 



16
17
18
19
20
 
# 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 



22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
 
# 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|
    block = false

    event = nil
    scope = gateway_request.env[Datadog::AppSec::Ext::SCOPE_KEY]

    AppSec::Reactive::Operation.new('rails.request.action') do |op|
      Rails::Reactive::Action.subscribe(op, scope.processor_context) do |result|
        if result.status == :match
          # TODO: should this hash be an Event instance instead?
          event = {
            waf_result: result,
            trace: scope.trace,
            span: scope.service_entry_span,
            request: gateway_request,
            actions: result.actions
          }

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

      block = Rails::Reactive::Action.publish(op, gateway_request)
    end

    next [nil, [[:block, event]]] if block

    ret, res = stack.call(gateway_request.request)

    if event
      res ||= []
      res << [:monitor, event]
    end

    [ret, res]
  end
end