Bilibili fails to download chapters

[6mai]

Errors with "Cannot destructure property 'cipherName' of '__privateGet(...)[nH(...)]' as it is undefined." when trying to download a chapter. The first 3 pages of a chapter are viewable for whatever reason

[MikeZeDev]

Manga url pls

[6mai]

https://manga.bilibili.com/detail/mc27165

This is the only one I tried and just assumed it was the whole site that was broken.

[MikeZeDev]

Dev notes : they now do all the job inside the wasm. That is so dirty

[bropines]

Dev notes : they now do all the job inside the wasm. That is so dirty

Hmmm. Well, I suppose it's hard to fix it. I have a more simplified idea. In fact, as I found out, all BB pictures when loaded are stored in AVIF and TXT (Octet-Stream), which is surprisingly well read through https://github.com/hoothin/uuserscripts/tree/picViewer%20ce%2b

Alas, it does not have a normal bootloader while maintaining order, but I believe you will understand how to use it

[MikeZeDev]

Idk what you are saying but basically picture bytes are send to a wasm with a private key for decryption.
So, there are a few way to get decrypted bytes. But we must chose carefully how to do it.

[bropines]

Idk what you are saying but basically picture bytes are send to a wasm with a private key for decryption. So, there are a few way to get decrypted bytes. But we must chose carefully how to do it.

That's it. PicViewer somehow (more likely from the site's memory) pulls out the regular non-encrypted versions of the pictures. That is, I can calmly download the already LOADED image through this extension.
https://disk.yandex.com/i/YsZOtzwp_VtgtQ

[MikeZeDev]

Wont go in details but there is a reason why you got unencrypted pictures and thats not bullet proof.
I think Its because WASM dont decrypt files > 1MB for performances reasons therefore what you download using file link is a real picture.

[bropines]

Wont go in details but there is a reason why you got unencrypted pictures and thats not bullet proof. I think Its because WASM dont decrypt files > 1MB for performances reasons therefore what you download using file link is a real picture.

As a temporary solution, is the proposed method suitable, or do you want to write a more stable solution? Right now, my problem is not to download everything, but to download it sequentially... This is very frustrating, as some comics have 150 pages...

[rainrdx]

I tried the new code, and not even finishing downloading a single chapter, I got

"检测到用户运行环境异常，为了您的账号安全，请前往 哔哩哔哩漫画APP 最新版本阅读～"

Which mean it has detected abnormality in the user's runtime. For your account security, please read with Bilibili manga app's most recent version. And then I can't even read anything online, although the app is still fine.

I feel bilibili is now just crazy with risk control and detecting any attempt to download now sigh.

[MikeZeDev]

I tried the new code, and not even finishing downloading a single chapter, I got

"检测到用户运行环境异常，为了您的账号安全，请前往 哔哩哔哩漫画APP 最新版本阅读～"

Which mean it has detected abnormality in the user's runtime. For your account security, please read with Bilibili manga app's most recent version. And then I can't even read anything online, although the app is still fine.

I feel bilibili is now just crazy with risk control and detecting any attempt to download now sigh.

The question is HOW did you try?
The code is not pushed yet.

[rainrdx]

I forked the PR and did a CI on my own CF site. Again thank you for working on this. I just mean to report that Bilibili is crazy nowadays and your keeping working on this is just so appreciated.