在写爬虫之前，我们还需要了解一些基础知识，如 HTTP 原理、网页的基础知识、爬虫的基本原理、Cookies 的基本原理等。本章中，我们就对这些基础知识做一个简单的总结。
来源：https://cuiqingcai.com/5462.html
[Python3 网络爬虫开发实战] 2 – 爬虫基础 | 珊瑚贝
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