ActiveResource filter logging of sensitive params

active_resource_filtered_logger.rb

require 'active_resource/base'
require 'active_resource/log_subscriber'

module ActiveResource
  class LogSubscriber < ActiveSupport::LogSubscriber
    def request_with_filtered_logging(event)
      request_uri = event.payload[:request_uri]
      start_of_query_string = request_uri.index("?")
      request_uri_without_query_string = request_uri[0, start_of_query_string]
      query_string = request_uri[(start_of_query_string + 1)..-1]
      query_hash = Rack::Utils.parse_nested_query(query_string).with_indifferent_access
      Rails.configuration.filter_parameters.each { |param| query_hash[param] = "[FILTERED]" if query_hash.has_key?(param) }
      event.payload[:request_uri] = "#{request_uri_without_query_string}?#{query_hash.to_query}"
      request_without_filtered_logging(event)
    end

    alias_method_chain :request, :filtered_logging
  end
end

ActiveResource::Base.logger = Rails.logger