Extracting zipped files using JSZIP in javascript

Question

In my webpage, a user is supposed to upload a zipped file. Within the zipped file are 2 files: another zip file and a txt file. On my server, after receiving the zip, I want to unzip the zip file to extract the zip & txt file, then move those 2 files to a predefined folder. I have a piece of code that extracts the zip file, but the data doesn't seem correct. Firstly, it unzipped a zip and 2 txt file when there should only be 1 txt file. It created an additional 'undefined' txt file. Also, in my txt file, instead of the original data, it was replaced with the following text: '[undefined] [undefined]'.
Can anyone help me on this? The following is my code:

var JSZip = require('JSZip');

fs.readFile( filePath, function(err, data){
  if (!err){
    var zip = new JSZip();
    JSZip.loadAsync(data).then(function(zip){
      object.keys(zip.files).forEach(function(filename){
        var content = zip.files[filename];
        var dest = path + filename;
        fs.writeFileSync(dest, content);
      });
    });
  }
});

Answer 1

It took a bit of digging in their documentation but they have an example that shows how to read the file contents from a ZIP.

You are getting the object that describes the ZIP contents but not the actual content. Here is an adjusted version:

var JSZip = require('JSZip');

fs.readFile(filePath, function(err, data) {
    if (!err) {
        var zip = new JSZip();
        zip.loadAsync(data).then(function(contents) {
            Object.keys(contents.files).forEach(function(filename) {
                zip.file(filename).async('nodebuffer').then(function(content) {
                    var dest = path + filename;
                    fs.writeFileSync(dest, content);
                });
            });
        });
    }
});