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zhihu_crawler

①利用selenium对知乎进行模拟登陆获取其cookies并进行爬取，其中包括突破了极验的倒立文字验证和简单的英文验证码的限制

②并模拟输入搜索关键字，对待爬取的url进行定位并收集待爬取urls

③利用scrapy框架对url进行爬取，并利用scrapy提供的twisted异步IO流将数据写入mysql数据库

④防网站屏蔽措施包括随机UA的切换以及proxy代理池的随机代理切换

⑤后续将构思把所爬取的知乎问答数据进行可视化并数据分析呈现

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