request.body.split('&').each отображает неопределенный метод `each' для nil:NilClass

Когда я запускаю следующую часть своего кода, появляется ошибка «неопределенный метод `каждый’ для nil: NilClass».

if request and request.body
  print_status(request.body);
  request.body.split('&').each { |var|
    parts = var.split('=', 2)
    if parts.length != 2
      print_error("Weird, we got a var that doesn't contain an equals: #{parts.inspect}")
    else
      fln,fld = parts
      fld = Rex::Text.uri_decode(fld)
      if fln == "script"
        script = fld
      end
    end
  }
end

Некоторые тесты с request.body:

- ----------------------------------
- request.body.class: String
- request.body: script=test
- request.body.split('&'): ["script=test"]
- Sending
- ----------------------------------
- request.body.class: String
- request.body: script=alert%28%27ok%27%29%3B
- request.body.split('&'): ["script=alert%28%27ok%27%29%3B"]
- Sending
- ----------------------------------
- request.body.class: String
- request.body: script=alert%28%27ok%27%29%3B%3D
- request.body.split('&'): ["script=alert%28%27ok%27%29%3B%3D"]
- Exception handling request: undefined method `each' for nil:NilClass
- ----------------------------------
- request.body.class: String
- request.body: script=alert%28%27ok%27%29%3B%5D
- request.body.split('&'): ["script=alert%28%27ok%27%29%3B%5D"]
- Exception handling request: undefined method `each' for nil:NilClass
- ----------------------------------
- request.body.class: String
- request.body: script=alert%28%27ok%27%29%3B-
- request.body.split('&'): ["script=alert%28%27ok%27%29%3B-"]
- Exception handling request: undefined method `each' for nil:NilClass
- ----------------------------------
- request.body.class: String
- request.body: script=alert%28%27ok%27%29%3B+
- request.body.split('&'): ["script=alert%28%27ok%27%29%3B+"]
- Exception handling request: undefined method `each' for nil:NilClass

Большинство специальных символов вызывают ошибку.
Что может быть не так?