Module: Datadog::AppSec::Contrib::Rack::Reactive::Response

Defined in:
lib/datadog/appsec/contrib/rack/reactive/response.rb

Overview

Dispatch data from a Rack response to the WAF context

Class Method Summary collapse

Class Method Details

.publish(op, gateway_response) ⇒ Object 



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# File 'lib/datadog/appsec/contrib/rack/reactive/response.rb', line 16

def self.publish(op, gateway_response)
  catch(:block) do
    op.publish('response.status', gateway_response.status)
    op.publish('response.headers', gateway_response.headers)

    nil
  end
end

.subscribe(op, waf_context) ⇒ Object 



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# File 'lib/datadog/appsec/contrib/rack/reactive/response.rb', line 25

def self.subscribe(op, waf_context)
  op.subscribe(*ADDRESSES) do |*values|
    Datadog.logger.debug { "reacted to #{ADDRESSES.inspect}: #{values.inspect}" }

    response_status = values[0]
    response_headers = values[1]
    response_headers_no_cookies = response_headers.dup.tap { |h| h.delete('set-cookie') }

    waf_args = {
      'server.response.status' => response_status.to_s,
      'server.response.headers' => response_headers,
      'server.response.headers.no_cookies' => response_headers_no_cookies,
    }

    waf_timeout = Datadog.configuration.appsec.waf_timeout
    result = waf_context.run(waf_args, waf_timeout)

    Datadog.logger.debug { "WAF TIMEOUT: #{result.inspect}" } if result.timeout

    case result.status
    when :match
      Datadog.logger.debug { "WAF: #{result.inspect}" }

      yield result
      throw(:block, true) unless result.actions.empty?
    when :ok
      Datadog.logger.debug { "WAF OK: #{result.inspect}" }
    when :invalid_call
      Datadog.logger.debug { "WAF CALL ERROR: #{result.inspect}" }
    when :invalid_rule, :invalid_flow, :no_rule
      Datadog.logger.debug { "WAF RULE ERROR: #{result.inspect}" }
    else
      Datadog.logger.debug { "WAF UNKNOWN: #{result.status.inspect} #{result.inspect}" }
    end
  end
end