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Extract a zip archive to buffer generates an invalid zip archive

See original GitHub issue

When open and extract a zip archive, it fails. Please use the following code and the attachment to reproduce it.

const AdmZip = require('adm-zip')

let zip1 = new AdmZip('./bug-data.zip')	//this zip file can be validated by other zip tools (7z, WinRAR), which should be valid.
//zip1.extractAllTo('./extracted1')		//this does succeed

//actually the following toBuffer() is buggy. It generates an entry with invalid CRC.
//If you write the buffer to a file and examine with zip tools (e.g. WinRAR), it says one entry is corrupted.
let zip2 = new AdmZip(zip1.toBuffer())	

//The following operation will fail: invalid block type
zip2.extractAllTo('./extracted2')

bug-data.zip

Issue Analytics

State:
Created 4 years ago
Comments:5

Top GitHub Comments

1reaction

currancommented, Oct 24, 2019

Possible duplicate of https://github.com/cthackers/adm-zip/issues/289

0reactions

5saviahvcommented, Mar 9, 2021

It should be fixed for now

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