Android逆向之路---让我们试试另一种方法看漫画-(2)

前言

上次我们分析到了快看漫画的协议部分,这次我们根据他的协议来手动写个脚本,然后执行以后,可以把他的漫画自动下载到电脑上面,
然后自动拼接图片,这样就可以实现在电脑上当成一个长图来看漫画了,没有广告,没有app的一些限制,先上图,一起看看成果

本文分析基于:快看漫画5.2.0(52000)
事先说明,这是一个系列,关于快看漫画的系列,不过在今天写看漫画这个系列的时候,博主后面的工作也还没有做呢,也希望在大家的监督之下一点一点的全部完成吧。
ps:避免广告嫌疑,以下统称kk漫画了。

为什么选择这个app?
排名靠前啊,反正就选到了,
有对别的感兴趣的同学也欢迎投稿,博主会尽自己所能,给大家带来点好玩的。

觉得看好多地方比较突然的,可以先转到上一篇,然后再来看这篇文章。
传送门:Android逆向之路—让我们试试另一种方法看漫画-(1)/)

找到正确的协议

上次我们找到了了协议的大概位置,这次我们要针对整个请求的过程进行精准的分析。包括每个接口的作用。
首先把log清空,然后点击他的开始阅读,我抓到了以下log
我以漫画:《李泰和方小甜的平行世界》为例子

经过我的分析,先和大家说结果:
1,4主要就是请求漫画的接口了
3,6主要是请求了一些广告信息
7可以理解为上传一些打点数据
2主要是获取了一些评论回复信息
5可能是和一些社交相关的,这个是我猜的

首先根据Log信息,我们能发现这些接口的作用,当然了,博主还有另一种办法,我们根据这些接口信息,依次的去找源码

源码分析

先分析

https://api.kkmh.com/v2/comic/22535?is_preview=0

我在源码里面搜v2/comic/,为什么这么搜,因为真正有开发经验的人是知道的,后面的一般开发的时候会写成可变的参数,
前面的url一般也是,我们开发的时候会有测试服务器和正式服务器,前面的是会变的,
搜索结果如下:

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.method public abstract getComicDetail(JI)Lretrofit2/Call;
.param p1 # J
.annotation runtime Lretrofit2/http/Path;
value = "comic_id"
.end annotation
.end param
.param p3 # I
.annotation runtime Lretrofit2/http/Query;
value = "is_preview"
.end annotation
.end param
.annotation system Ldalvik/annotation/Signature;
value = {
"(JI)",
"Lretrofit2/Call",
"<",
"Lcom/kuaikan/comic/rest/model/API/ComicDetailResponse;",
">;"
}
.end annotation
.annotation runtime Lretrofit2/http/GET;
value = "/v2/comic/{comic_id}"
.end annotation
.end method

怎么样,这个看着太费劲了,我还是手动转成java来看

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@GET("/v2/comic/{comic_id}")
@Query("is_preview")
@Path("comic_id")
public abstract Call.retrofit2 getComicDetail();

根据方法名字其实就已经可以猜的可以了,然后利用动态调试,我们可以在APIRestClient.smali里面调用的地方打好断点,
(具体的动态调试方法,以前也说过,不熟悉的同学可以去翻我以前的文章)

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const/4 v0, 0x1
:goto_0
invoke-interface {v1, p1, p2, v0}, Lcom/kuaikan/comic/rest/SignInterface;->getComicDetail(JI)Lretrofit2/Call;
move-result-object v0
invoke-interface {v0, p4}, Lretrofit2/Call;->enqueue(Lretrofit2/Callback;)V
.line 202
return-void

然后我们能够看出来,这个主要就是利用retrofit框架,来进行网络请求。

开始分析协议

首先通过log,或者动态调试我们已经拿到他请求回来的json数据了

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{"code":200,"data":{"comment_view_message":"吐槽神马的尽管来","can_view":true,"cover_image_url":"http://f2.kkmh.com/image/170310/hi585uspn.webp-w640","created_at":1467150603,"recommend":{"recommend_list":[{"male_vertical_image_url":"http://f2.kkmh.com/image/171213/rt79rf2bj.webp-w320.w","vertical_image_url":"http://f2.kkmh.com/image/171213/rt79rf2bj.webp-w320.w","recommend_tag":["奇幻","剧情"],"topic_id":544,"recommend_source":"AI推荐","title":"整容游戏"},{"male_vertical_image_url":"http://f2.kkmh.com/image/171212/rl5z4ftks.webp-w320.w","vertical_image_url":"http://f2.kkmh.com/image/171212/rl5z4ftks.webp-w320.w","recommend_tag":["都市"],"topic_id":782,"recommend_source":"AI推荐","title":"密会"},{"male_vertical_image_url":"http://f2.kkmh.com/image/161220/7tsm5zh6g.webp-w320.w","vertical_image_url":"http://f2.kkmh.com/image/161220/7tsm5zh6g.webp-w320.w","recommend_tag":["灵异"],"topic_id":786,"recommend_source":"AI推荐","title":"百怪夜谭"}],"title":"猜你喜欢"},"is_favourite":false,"title":"第1话 爱的供养","widgets":[],"recommend_count":0,"updated_at":1489143638,"selling_kk_currency":0,"zoomable":1,"push_flag":0,"previous_comic_id":null,"share":{"award":false,"activity_id":null,"show_draw_record":false,"title":""},"customized_share":[{"description":"短篇合集,讲述一场自来水污染导致人类出现的奇奇怪怪的疾病。细思极恐,高能慎入!看作者的脑洞能有多大!【授权/每周五更新 责编:拉面】","share_platform":4,"title":"好看哭!《李泰和方小甜的平行世界》这个漫画太优秀了!","picture":"http://f2.kkmh.com/image/170310/hi585uspn.webp-w640","url":"https://m.kuaikanmanhua.com/comics/22535"},{"description":"短篇合集,讲述一场自来水污染导致人类出现的奇奇怪怪的疾病。细思极恐,高能慎入!看作者的脑洞能有多大!【授权/每周五更新 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以上的这些是完整的json数据,我们当然只说重点了。
加载机制:
关于kk漫画的加载机制,假如你现在在看第2章的漫画,当你看到一半多的时候,他就会请求这个接口,提前把第3章漫画的图片的url地址都拿下来。
依此类推。
我们需要关注的是,他如何找到下一个漫画的id,然后又如何判断下一个漫画的标题等等。

我们可以通过在程序里打断点,动态调试,或者看静态源码,或者Log信息,最终发现返回的数据如下,
关于重点的一些信息,我做了标记

制作我们自己的脚本的思路

思路:我们首先请求第一章的id,我们现在的id是22535,根据刚刚的Log分析可知。
然后我们请求回来之后,把images里面的图片都保存到指定的文件夹,准备合并。
然后请求下一章节,继续,直到所有漫画都下载到本地。
合并每个文件夹里面的图片,最后这些长图就是我们想看的漫画了。

我用的python写的这个脚本,因为个人平时都是用java,有些地方写的不好,也欢迎大家指正

我的脚本

github地址
运行环境:
python3.6+
Pillow库,
具体的可以查看ReadME,也可以联系本人

运行方法:
python .\app.py ${id}

1
python .\app.py 22535

22535只是一个章节的id,

我就以《漫画A作为例子》
然后脚本就会自动的在当前文件夹下面生成两个文件夹
漫画A和漫画A-result

漫画A-result里面就是拼接好的漫画了
漫画A-是分批下载的一些临时文件

具体如图:

前面的就是我们下载的一些临时文件
后一张图就是我们做好的了

声明

本文只做技术研究,不做商用,如有同学做商用,恶意攻击服务器,等非法行为,本人概不负责

告一段落

好了好了,其实说到了这里,今天就说到这里吧,这次把一整本书的内容都提取出来了。
可以开开心心的在本地看漫画了。

我希望呢,自己写博客,能够认认真真的写出一点东西分享给大家,而不是网上抄来抄去。希望能做一个踏踏实实做技术的人吧,不敢求太多,能给大家带来点好玩的就挺好。

写在最后

有什么问题欢迎给博主指出。
包括python,程序分析方面的问题,等。

成品就不上传了,希望大家都能跑

忽然想到id获取的问题,其实有几个思路,

  • sd卡的根目录创建/KuaiKan文件夹,然后里面创建了一个空的kkmh_debug文件。使kk漫画处于debug模式下,自己抓Log
  • 博主可以去对app重新打包,然后加上一些个人的代码,二次打包发布出来
  • 写个xposed插件供大家使用

具体的可以下回说,也可以大家自己来发挥想象力啦,有什么问题欢迎联系我

关于我

个人网站:MartinHan的小站

博客:hanhan12312的专栏

知乎:MartinHan01