由于无效的CEN错误，通过nodejs应用程序下载后无法打开zip文件 [英] Can not open zip file after downloading through nodejs application because of Invalid CEN error

问题描述

我需要在我的nodejs应用程序中下载并解压缩zip归档文件.我有以下代码:

I need to download and unzip zip archive in my nodejs application. I have this code:

utils.apiRequest(teamcityOptions)
        .then(function (loadedData) {
          var tempDir = tmp.dirSync();
          var tmpZipFileName = tempDir.name + "\\" + 'bob.zip';

          fs.appendFileSync(tmpZipFileName, loadedData);

          var zip;
          try {
            zip = new AdmZip(tmpZipFileName);
          } catch (e) {
            log('Can not create zip, bad data', e);
          }
        });

此代码给我错误:

无法创建zip，数据错误CEN标头无效(签名错误)

Can not create zip, bad data Invalid CEN header (bad signature)

我正在使用Windows7.我什至无法使用7-zip或WinRAR(诸如损坏的数据之类的简单错误)打开此ZIP文件.

I am using Windows 7. I can't even open this ZIP file with 7-zip or WinRAR (simple error like corrupted data).

此外，utils.apiRequest函数主体为:

utils.apiRequest: function (options) {
  var deferred = defer();
  https.get(options, function (request) {
    var loadedData = '';
    request.on('data', function (dataBlock) {
      loadedData += dataBlock.toString('utf8');
    });
    request.on('end', function () {
      deferred.resolve(loadedData);
    })
  });
  return deferred.promise;
}

我该如何解决我的问题?

How can I solve my problem?

PS:使用curl没问题:)

PS: I don't have problems using curl :)

推荐答案

问题是您将接收到的数据解码为utf8字符串:

The problem is that you're decoding the received data into an utf8 string:

request.on('data', function (dataBlock) {
  loadedData += dataBlock.toString('utf8'); // this is wrong
});

由于zip文件是二进制文件，因此您应该使用Buffer.

Since a zip file is binary you should use a Buffer.

以下是使用缓冲区替换utils.apiRequest的示例:

Here is an example replacement for your utils.apiRequest with Buffer:

utils.apiRequest: function (options) {
    var deferred = defer();
    https.get(options, function (request) {
        var data = []; 
        request.on('data', function (dataBlock) {
            data.push(dataBlock); 
        });
        request.on('end', function () {
            deferred.resolve(Buffer.concat(data));
        });
    });
    return deferred.promise;
}

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