Douban no longer provides book APIs to the public, so it can only use web crawling to obtain data. This is a calibre Douban plugin based on web crawling.
豆瓣已经不再给大众提供书籍API，因此只能通过网页爬虫抓取书籍数据，这是基于网页抓取的calibre 豆瓣插件。
Github：
https://github.com/fugary/calibre-douban