Improved LegacyWhatsApp APK download handler

[elzdave]

Because whatscrypt.com somewhat obsolete, and the archive.org sometimes returning Content-Length 0 on HEAD, I managed to update the whatscrypt CDN server to use another server from androidapksfree.com, and slightly improved the source code for better reading and debugging.

[YuvrajRaghuvanshiS]

Hi @elzdave thank you for the work that you put in, being extremely busy lately I could not watch this project. Before I pull it in however please confirm if:

• [ ] You have tested the project after making changes
• [ ] new CDN for legacy whatsapp trusted?

[elzdave]

Hello @YuvrajRaghuvanshiS

It's okay, we got your back. Confirmed:

• [x] You have tested the project after making changes Yes, tested on the same device I worked on. Working nice as expected.

• [x] new CDN for legacy whatsapp trusted? Yes, confirmed by SHA256 hash on both APKs from both CDN servers. Actually, the alternate CDN is much faster than the official archive.org server.

Below is the hash from both APKs attached, first one from alternate CDN 51a387f08debd7e53bcaf9f3174760930787bc5c1dcefb3c8d7ee52b524cd27d WhatsApp-v2.11.431-AndroidBucket.com.apk 51a387f08debd7e53bcaf9f3174760930787bc5c1dcefb3c8d7ee52b524cd27d WhatsApp.apk

[YuvrajRaghuvanshiS]

Pulled ^^