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rzymek / opczip

Open Packaging Conventions compatible ZIP64 implementation. Especially MS Excel compatible.
Apache License 2.0
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LibreOffice compatibility (ask to repair the file) #10

Open leiblix opened 5 days ago

leiblix commented 5 days ago

Recently, LibreOffice started reporting files generated by OpcZip as corrupted.

Fastexcel: https://github.com/dhatim/fastexcel/issues/486 Apache POI: https://github.com/apache/poi/pull/154

Bug report on LibreOffice is here https://bugs.documentfoundation.org/show_bug.cgi?id=163384#c5

The problem is kind of related https://github.com/rzymek/opczip/issues/9

Sizes are written as Long (ZIP64), but there is no zip64 extension provided => LibreOffice read just first 32 bites of these and the remaining bytes are detected like loopholes in ZIP.

leiblix commented 5 days ago

According to the latest message, they have read your article (https://rzymek.github.io/post/excel-zip64/) and will fix it in LibreOffice.

So basically, the package is not a fully valid zip64, but it is an industry standard defined by Excel. :-|

If they fix it (I hope so), I will close this task myself.