在javascript中使用JSZIP提取压缩文件 [英] Extracting zipped files using JSZIP in javascript

问题描述

在我的网页中，用户应该上传压缩文件。在压缩文件中有2个文件：另一个zip文件和一个txt文件。在我的服务器上，收到zip后，我想解压缩zip文件以解压缩& txt文件，然后将这2个文件移动到预定义的文件夹。我有一段代码提取zip文件，但数据似乎不正确。首先，当只有1个txt文件时，它解压缩了一个zip和2个txt文件。它创建了一个额外的未定义txt文件。此外，在我的txt文件中，它替换为原始数据，而是替换为以下文本：'[undefined] [undefined]'。

有谁可以帮我这个？以下是我的代码：

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);
      });
    });
  }
});

推荐答案

他们的文档花了一些时间，但他们示例，展示如何从ZIP中读取文件内容。

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.

您正在获取描述 ZIP内容但不是实际内容的对象。以下是调整后的版本：

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);
                });
            });
        });
    }
});

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