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glidedsky挑战-逆向JS（jsfuck反爬）

相应网站：http://glidedsky.com/level/crawler-javascript-obfuscation-1

题目要求：

再看看页面的分析：

页面中，没有对应的数据，那么就看看它们是从那里来的。

再看看请求，运气真好，一下子就找到了。

再看看请求头

请求url:http://glidedsky.com/api/level/web/crawler-javascript-obfuscation-1/items?page=1&t=1568556513&sign=b757918b53bbeed690a39e44f04a1753329665a8

请求参数，

page(页码) t(时间) sign(不清楚) 。

sign 从那里来，查找一下(sign)看看，未找到，再试试 sign: sign= 结果都没找到。

一脸蒙蔽。。。。。。。

那再看看XHR 请求

果然找到了：

这时就很清楚了。sha1加密。

说到这里，都没说到 jsfuck 。

点进去看看js 代码：

全是 [] +-= 看不懂：

其实就是jsfuck 代码，是种 js 的加密方式。

对应网站：http://www.jsfuck.com/

github:https://github.com/aemkei/jsfuck

那么，我们如果去解析它呢？

其实jsfuck代码在控制台是可以解析出来的。

我们把代码复制出来，

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放到控制台是看看:

有错误，但是也能找到 vm104.3。不过这种方式不是次次都有效果。

把jsfuck放到notopad++中。把光标放到最后一个后面，看看匹配的字段在那里，复制出来再放到console中执行。

对应的代码就出来了：

这样一看，加密瞬间就简单了。

应于网站要求，这里只说思路，不提供代码。

1、找出jsfuck代码；

2、解析jsfuck代码；

3、阅读js代码；

3、根据js代码，求出 page, t sign的值；

4、拼接url,进行访问请求。

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