escape.rb

def escape_response
    escape = lambda do |unescaped_response|
      unescaped_response.each do |value|
        if value.is_a?(String)
          value = ERB::Util.h(value)
        elsif [Array, Hash].any?{|klass| value.is_a?(klass) }
          value = escape.call(value)
        end
      end
    end

    if response.content_type == 'application/json'
      response_body = JSON.parse(response.body)
      escaped_hash = escape.call(response_body)
    end
  end