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101arrowz
unzip does not support >65,535 files
How to reproduce
If you try to unzip or unzipSync a zip file containing >65,535 files, only 65,535 files will be listed.
For example:
// Load zip file containing 100,000 files into ArrayBuffer
const zipArray = new Uint8Array(zipBuffer);
const files = unzipSync(zipArray);
console.log(Object.keys(files).length) // 65535
The problem
This issue occurs without any error messages, the number of files is simply truncated to 65,535.
Could you provide a sample file (or how to generate one) so I can reproduce this?
No problem: here's a zip file containing 70,000 sequentially named text files I created using a simple node script, then zipped using tar.
const fs = require('fs');
for (let i = 1; i <= 70000; i++) {
fs.writeFileSync(`./files/file-${('000000' + i).substr(-6)}.txt`, 'x');
}
tar -a -c -f ../70000-files.zip *
fflate isn't looking at the Zip64 end-of-central-directory record so it can only use the number of files given in the standard 16-bit EOCD record. This should be fixable, I'll look into it.