Invalid non-string/buffer chunk

[keyiis]

I used jszip(3.1.4) with electron/angular4/typescript,but not work. my code

let zip = new JSZip();
zip.file(dbFilePath);console.log(zip);
zip.generateAsync({type:"blob"}).then(blob=>{
     .......
});

error info

TypeError: Invalid non-string/buffer chunk

[dduponchel]

It seems you edited the issue without changing the title (the issue doesn't have anything to do with "zip.generateAsync is not a function").

zip.gen.generateAsync seems strange, there is no gen attribute on JSZip instance. I'll assume this is just a typo.

Do you have a stacktrace for this error ?

[keyiis]

@dduponchel sorry it's my mistake,i already modify title and code :)

[keyiis]

@dduponchel the dbFilePath is path of sqlite database file,eg d:\db\test.db

[keyiis]

@dduponchel if i use zlib,i get same error fs.createReadStream(dbFilePath).pipe(zlib.createGzip()).pipe(fs.createWriteStream(dbFilePath+'.gz'));

[keyiis]

@dduponchel i changed to generateNodeStream,but get same error my code

let zip = new JSZip();
      zip.file(dbFilePath);
      zip.generateNodeStream({ type: 'nodebuffer', streamFiles: true })
        .pipe(fs.createWriteStream('out.zip'))
        .on('finish', function () {
          // JSZip generates a readable stream with a "end" event,
          // but is piped here in a writable stream which emits a "finish" event.
          console.log("out.zip written.");
        });

error info

core.es5.js:1020 ERROR TypeError: Invalid non-string/buffer chunk
    at validChunk (_stream_writable.js:209)
    at WriteStream.Writable.write (_stream_writable.js:239)
    at NodejsStreamOutputAdapter.ondata (_stream_readable.js:612)
    at NodejsStreamOutputAdapter.EventEmitter.emit (events.js:81)
    at addChunk (_stream_readable.js:284)
    at readableAddChunk (_stream_readable.js:271)
    at NodejsStreamOutputAdapter.Readable.push (_stream_readable.js:238)
    at StreamHelper.<anonymous> (NodejsStreamOutputAdapter.js:22)
    at ConvertWorker.<anonymous> (StreamHelper.js:172)
    at ConvertWorker.emit (GenericWorker.js:122)
    at ConvertWorker.push (GenericWorker.js:48)
    at ConvertWorker.processChunk (ConvertWorker.js:21)
    at ZipFileWorker.<anonymous> (GenericWorker.js:154)
    at ZipFileWorker.emit (GenericWorker.js:122)
    at ZipFileWorker.push (GenericWorker.js:48)
    at ZipFileWorker.push (ZipFileWorker.js:371)
    at ZipFileWorker.flush (ZipFileWorker.js:450)
    at ZipFileWorker.end (GenericWorker.js:59)
    at ZipFileWorker.resume (ZipFileWorker.js:506)
    at ConvertWorker.resume (GenericWorker.js:196)
    at Immediate.<anonymous> (utils.js:384)
    at ZoneDelegate.1804.ZoneDelegate.invokeTask (zone.js:424)

[keyiis]

@dduponchel i can get source file data

var rs = fs.createReadStream(dbFilePath);
      rs.on('data', (data:any)=>{
        console.log(data);
      }).on('close', function() {
        console.log('close');
      });

[dduponchel]

That looks like an issue with the type of an object, not the content of the input file. I think you could use any content to trigger the issue.

zip.file(dbFilePath) looks strange: with only a path, you are using file(name), not file(name, data [,options]), meaning you don't add any content.

I suspect JSZip to interact badly with either angular's zones or different electron contexts. I tested your code inside the electron-quick-start project and with a freshly bootstrapped angular 4 project but I can't reproduce the issue. Would you be able to create a minimal project to reproduce the issue ?

[keyiis]

@dduponchel thanks reply! i'm a little confused,i already give file path to jszip,it should read file through the path automatically?

[dduponchel]

Your code, on its own, works. I think the issue appears in some use cases with angular4/electron. To understand what's going on, I need to reproduce the error on my side. Just adding angular4 or electron in my tests couldn't reproduce it (the code still works). That's why I need a complete project, if possible a minimal one (like stackoverflow minimal example for example) which triggers the error.

[haydonduan]

@keyiis Was your issue fixed?

[sanketkhanwalkar]

@haydonduan @keyiis @dduponchel I recently moved the config to webpack and jszip started throwing errors like:

TypeError: Invalid non-string/buffer chunk
    at validChunk (_stream_writable.js:209:10)
    at WriteStream.Writable.write (_stream_writable.js:239:21)
    at NodejsStreamOutputAdapter.ondata (webpack-internal:///240:531:20)
    at NodejsStreamOutputAdapter.EventEmitter.emit (webpack-internal:///46:81:17)
    at readableAddChunk (webpack-internal:///240:198:18)
    at NodejsStreamOutputAdapter.Readable.push (webpack-internal:///240:157:10)
    at StreamHelper.eval (webpack-internal:///868:22:19)
    at ConvertWorker.eval (webpack-internal:///340:172:20)
    at ConvertWorker.emit (webpack-internal:///21:122:42)
    at ConvertWorker.push (webpack-internal:///21:48:14) 

Uncaught Error: The data of 'testFolder/c4e5ef9e-5edd-4ecc-8a17-f5e803a3d079.png' is in an unsupported format Any thoughts?

[keyiis]

@haydonduan i give up jszip

[Julycc41]

@haydonduan我放弃 jszip Can you recommend any other ZIP plug-ins you are using now？