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在Scrapy的Downloader Middleware中使用Selenium下载页面时,如何使用异步?

在下载中间件中,Request请求似乎是以同步的方式传入process_request方法的,而我在这里使用selenium下载页面并返回Response对象,就不会使用Scrapy的下载器。最后,全程只有一个浏览器实例在运行,每次只能处理一个请求,请问应该如何处理以提高爬取效率?非常感谢。


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与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
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