I'm using Node.js to zip up a directory using the node-zip wrapper for JSZip. The crea

It seems that nodejs method <a href="http://nodejs.org/api/fs.html#fs_fs_write_fd_buff

<a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/us

I had the same problem. Instead of using jszip I'm using <a href="http://stackoverflow

Unzipping file results in *.cpgz file in place of contents about jszip HOT 9 CLOSED

stuk commented on June 30, 2024

Unzipping file results in *.cpgz file in place of contents

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Comments (9)

dduponchel commented on June 30, 2024

The resulting zip file contains your content as a base64 string.

$ base64 -d jsd-papuxetada.zip > decoded.zip
$ zipinfo decoded.zip
Archive:  decoded.zip
Zip file size: 224 bytes, number of entries: 2
drwx---     2.0 fat        0 b- stor 13-Mar-25 13:32 /tmp/
drwx---     2.0 fat        0 b- stor 13-Mar-25 13:32 /tmp/jsd-papuxetada/
2 files, 0 bytes uncompressed, 0 bytes compressed:  0.0%

The issue comes from zip.generate(). Without argument, this is the same as zip.generate({type:"base64"}) (it is an interesting default value for the location.href="data:application/zip;base64,"+content trick).
You should try zip.generate({type:"uint8array"}) or zip.generate({type:"arraybuffer"}) :-)

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commadelimited commented on June 30, 2024

Tried both of those options and got the same result. Each time I ran it, it still resulted in a *.cpgz file instead of the directory I was expecting.

Here's what I tried:

Encoded with uint8array

base64 jsd-qidecahoyo.zip > decoded.zip

zipinfo decoded.zip
[decoded.zip]
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
zipinfo:  cannot find zipfile directory in one of decoded.zip or
          decoded.zip.zip, and cannot find decoded.zip.ZIP, period.

zipinfo jsd-qidecahoyo.zip
[jsd-qidecahoyo.zip]
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
zipinfo:  cannot find zipfile directory in one of jsd-qidecahoyo.zip or
          jsd-qidecahoyo.zip.zip, and cannot find jsd-qidecahoyo.zip.ZIP, period.

Encoded with arraybuffer

base64 jsd-fowejeveli.zip > decoded2.zip

zipinfo decoded2.zip
[decoded2.zip]
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
zipinfo:  cannot find zipfile directory in one of decoded2.zip or
          decoded2.zip.zip, and cannot find decoded2.zip.ZIP, period.

zipinfo jsd-fowejeveli.zip
[decoded2.zip]
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
zipinfo:  cannot find zipfile directory in one of decoded2.zip or
          decoded2.zip.zip, and cannot find decoded2.zip.ZIP, period.

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dduponchel commented on June 30, 2024

It seems that nodejs method writeFileSync don't take an ArrayBuffer for buffer but transforms it to a string : the generated file contains [object ArrayBuffer].

Try to convert the ArrayBuffer into a Buffer :

var output = zip.generate({type:"arraybuffer"}),
    buffer = new Buffer(output.byteLength);

for (var i = 0; i < buffer.length; ++i) {
    buffer[i] = output[i];
}
fs.writeFileSync(baseDir + filename, buffer);

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commadelimited commented on June 30, 2024

Thanks. I'll give it a shot. Appreciate your time.

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commadelimited commented on June 30, 2024

@dduponchel Right on, that's really close. The zip file is extracting properly now, but the ZIP file itself is empty. The documentation itself doesn't explicitly say that it will add the contents of a directory along with the folder itself, but that's what most people would assume. I think I'm just going to go a diff route and dump all the files into one directory. Then I can loop over them and add each by itself.

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dduponchel commented on June 30, 2024

JSZip is designed to work in a browser. It works in nodejs but you will lack some things like the support of Buffer or utilities to recursively read a folder.

Maybe we should add some explanations in the documentation.

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Mithgol commented on June 30, 2024

The need to convert some ArrayBuffer into a Buffer here is yet another effect of nodejs/node-v0.x-archive#4742 wontfixed.

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p1nox commented on June 30, 2024

I had the same problem. Instead of using jszip I'm using this and is working fine.

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dannydulai commented on June 30, 2024

the problem is that jszip produces a pkzip file (4.5) and many archival programs only support 2.1

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Unzipping file results in *.cpgz file in place of contents about jszip HOT 9 CLOSED

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