Error analyzing epub (Central directory is empty, can't expand corrupt archive)

[FibreTTP]

I just experienced the exact same issue as in #1379 (with the exact same file).

Komga believes the ZIP file is corrupt, though I was able to extract everything in it with NanaZip and re-archive it (saved with .epub). Komga accepted this new archive without issue.

Looking at the properties of the "corrupt" ZIP file, NanaZip shows that there is a warning stating There are some data after the end of the payload data.

I believe NanaZip was able to extract it because either it or 7zip has some logic to ignore warnings / "corrupt" (badly written, but still intact) ZIP files: https://sourceforge.net/p/sevenzip/support-requests/339

[gotson]

Komga uses libraries to unzip files, those libraries may not try to read files on broken archives like other tools do. Fixing the archive is a better course of action.