十九：爬虫最终篇-平安银行商城实战

平安银行商场实战

需求

获取该商城商品信息

目标网址

https://m.yqb.com/bank/product-item-50301196.html?mcId=1583912328849970&loginMode=pab&history=y&sceneMode=m&traceid=30187_4dXJVel1iop

详细步骤

1、寻找数据接口

2、对比payload寻找可疑参数

3、多次重放请求确定反爬参数

这一块也就是说这三个参数咱们都需要进行处理

4、下xhr断点并堆栈回溯寻找加密位置

_对象值

5、进入g.default()函数内部

6、找到webpack加载器

7、扣出加载器

8、测试加载器并补window全局变量

var get_sign;
window = global
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}({'test':function (){console.log('get_sign')}},
)
get_sign('test')

9、补充加载模块

去掉重复 最终扣出的模块 一共5个 后续还会有一个是生成另一个参数的 大家往后看

10、生成sign逻辑

11、reqtranceno参数的寻找

进入h.default

将这个放到加载器中直接调用获取生成的值

12、还原python逻辑

总结

这是一个webpack的经典案例，难度适中，主要是要理解webpack的流程。对应三个参数该如果获取，先后的逻辑分析清楚就会非常简单

最后

随着本篇文章的结尾，爬虫阶段就正式结束了

在此，感谢大家的支持，接下来，我会持续更新OpenCV（计算机视觉开发）或C语言基础