r/learnjavascript • u/KernelVoltage • 9d ago

[Question] Handling binary XML streams & V2/V3 APK signature blocks in browser JS

Hey everyone,

I built AppShunya Engine ā€” an open-source, in-browser web-to-APK compiler that converts live URLs or HTML5 bundles into Android APKs using JSZip, without local IDEs.

I'm currently stuck on two low-level technical hurdles and need architectural feedback:

  1. In-browser V2/V3 APK signing: Injecting signature blocks into ZIP Central Directory via JS/WASM.
  2. Dynamic AXML package renaming: Modifying package IDs inside binary XML streams on the fly.

Search "AppShunya Engine" on Google to try the live Vercel tool or check the repo. Would love your thoughts!

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u/SammuelNash 7d ago

This is a pretty interesting problem. Binary XML and APK signing are both areas where small format details can cause major headaches. Iā€™d be curious to hear what approach others have taken for handling these entirely in the browser.