class CustomRetryMiddleware(RetryMiddleware):
    def process_response(self, request, response, spider):
        if request.meta.get('dont_retry', False):
            return response
        if 'showcaptcha?' in response.url:
            reason = 'capcha'
            original_url = request.meta['original_url']
            new_request = request.replace(url=original_url)
            return self._retry(new_request, reason, spider) or response
        return response