bootstrap菜鸟教程_中央农村工作会议精神内容_北京到安阳_大连网络营销咨询
from time import sleepclass WangyicrawlingDownloaderMiddleware:@classmethoddef from_crawler(cls, crawler):s = cls()crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)return sdef process_request(self, request, spider):return Nonedef process_response(self, request, response, spider):bro = spider.broif request.url in spider.module_urls:bro.get(request.url)sleep(3)html_data = bro.page_sourcenew_response = HtmlResponse(url=request.url, body=html_data, encoding='utf-8', request=request)return new_responseelse:return responsedef process_exception(self, request, exception, spider):passdef spider_opened(self, spider):spider.logger.info("Spider opened: %s" % spider.name)">