场景：当我处理electron解析压缩包实现进度条的过程中发现最终的文件字节数有缺失，且有些字节为0，使用tar库研究未果！
解决方案：引入其余库解决tar-fs/tar-stream/zlib
javascript
// 如果你也需要在electron中使用可以参考：https://blog.csdn.net/jyl919221lc/article/details/142764766?spm=1001.2014.3001.5501
try {
// 第一步：读取 tar.gz 文件，获取第一个目录名称
const extractor = tarStream.extract();
let extractedFolderName = null;
extractor.on('entry', (header, stream, next) => {
if (!extractedFolderName && header.type === 'directory') {
extractedFolderName = header.name.split('/')[0];
}
stream.resume(); // 跳过具体内容
next();
});
extractor.on('error', (err) => {
console.error('Error reading tar file to get folder name:', err);
resolve({ code: 0, msg: '导入失败：无法读取文件获取文件夹名称' });
});
extractor.on('finish', () => {
if (!extractedFolderName) {
resolve({ code: 0, msg: '导入失败：无法确定解压后的文件夹名称' });
return;
}
// 第二步：解压 tar.gz 文件到指定目录
const extract = tarFS.extract(diagnosisDir);
const readStream = fs.createReadStream(tarFilePath);
const gunzip = zlib.createGunzip(); // 创建 gunzip 解压缩流
let processedSize = 0;
const totalSize = fs.statSync(tarFilePath).size;
readStream.on('data', (chunk) => {
processedSize += chunk.length;
const progress = parseFloat((processedSize / totalSize).toFixed(2));
// mainWindow.setProgressBar(progress); 展示出electron进度条
});
readStream.on('error', (err) => {
console.error('Error reading the archive:', err);
resolve({ code: 0, msg: '导入失败：读取文件失败' });
});
extract.on('error', (err) => {
console.error('Error extracting the archive:', err);
resolve({ code: 0, msg: '导入失败：解压文件失败' });
});
extract.on('finish', () => {
console.log('Extraction completed');
// mainWindow.setProgressBar(-1); // 重置进度条
const fullPath = path.join(diagnosisDir, extractedFolderName);
console.log(fullPath, 'fullPath');
resolve({ code: 1, msg: '导入成功', path: fullPath });
});
// 管道：读取文件 -> 解压缩 -> 提取 tar 文件
readStream.pipe(gunzip).pipe(extract);
});
// 读取 tar.gz 文件以获取第一个目录名称
const readStreamForFolderName = fs.createReadStream(tarFilePath);
const gunzipForFolderName = zlib.createGunzip(); // 创建 gunzip 解压缩流
readStreamForFolderName.pipe(gunzipForFolderName).pipe(extractor);
} catch (error) {
console.error('Error during extraction:', error);
resolve({ code: 0, msg: '导入失败' });
}