Module: Datadog::AppSec::Contrib::Rack::Reactive::Request

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

Overview

Dispatch data from a Rack request to the WAF context

Class Method Summary collapse

Class Method Details

.publish(op, gateway_request) ⇒ Object 



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# File 'lib/datadog/appsec/contrib/rack/reactive/request.rb', line 20

def self.publish(op, gateway_request)
  catch(:block) do
    op.publish('request.query', gateway_request.query)
    op.publish('request.headers', gateway_request.headers)
    op.publish('request.uri.raw', gateway_request.fullpath)
    op.publish('request.cookies', gateway_request.cookies)
    op.publish('request.client_ip', gateway_request.client_ip)
    op.publish('server.request.method', gateway_request.method)

    nil
  end
end

.subscribe(op, waf_context) ⇒ Object 



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# File 'lib/datadog/appsec/contrib/rack/reactive/request.rb', line 33

def self.subscribe(op, waf_context)
  op.subscribe(*ADDRESSES) do |*values|
    Datadog.logger.debug { "reacted to #{ADDRESSES.inspect}: #{values.inspect}" }
    headers = values[0]
    headers_no_cookies = headers.dup.tap { |h| h.delete('cookie') }
    uri_raw = values[1]
    query = values[2]
    cookies = values[3]
    client_ip = values[4]
    request_method = values[5]

    waf_args = {
      'server.request.cookies' => cookies,
      'server.request.query' => query,
      'server.request.uri.raw' => uri_raw,
      'server.request.headers' => headers,
      'server.request.headers.no_cookies' => headers_no_cookies,
      'http.client_ip' => client_ip,
      'server.request.method' => request_method,
    }

    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