【Rollo的Python之路】Python 爬虫系统学习 (十二) 随机IP，随机UA

Python 爬虫系统学习:

随机IP,随机UA,在下载中间件：DownloadMiddleware 里面定义 一下，然后在settings里面开启一下中间件就OK

class RandomUserAgentMiddleware(object):
    def process_request(self,request,spider):
        ua = random.choice(spider.settings.get("USER_AGENT_LIST"))
        request.headers["User-Agent"] = ua

class ProxyMiddleware(object):
     def process_request(self,request,spider):
         ip = random.choice(spider.settings.get("IP_LIST"))
         request.meta["proxy"] = ip