ubuntu - 在golang中提取tarball时丢失文件

Question

我正在尝试使用此功能在解压缩文件后解压缩文件，但是，当它解压缩时，缺少一些文件夹，我不知道为什么。当我通过 GUI 打开创建的 tar 文件时，UnGzip 工作正常，因此不包含该功能。

func main() {
fileUrl := "https://www.clamav.net/downloads/production/clamav-0.103.1.tar.gz"
filePath := "clamav-0.103.1.tar.gz"
tempFolder := "temp"
    
err := os.Mkdir(tempFolder, 0755)
if err != nil {
    panic(err)
}

err = DownloadFile(filePath, fileUrl)
if err != nil {
    panic(err)
}
fmt.Println("Downloaded: " + fileUrl)

UnGzip(filePath,tempFolder + "/clamav.tar")
UnTar(tempFolder + "/clamav.tar",tempFolder + "/clamAV/")
//err := os.RemoveAll("tempFolder")
//if err != nil {
    //panic(err)
//}

}

func UnTar(tarball, target string) error {
reader, err := os.Open(tarball)
if err != nil {
    return err
}
defer reader.Close()
tarReader := tar.NewReader(reader)

for {
    header, err := tarReader.Next()
    if err == io.EOF {
        break
    } else if err != nil {
        return err
    }

    path := filepath.Join(target, header.Name)
    info := header.FileInfo()
    if info.IsDir() {
        if err = os.MkdirAll(path, info.Mode()); err != nil {
            return err
        }
        continue
    }

    file, err := os.OpenFile(path, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, info.Mode())
    if err != nil {
        return err
    }
    defer file.Close()
    _, err = io.Copy(file, tarReader)
    if err != nil {
        return err
    }
}
return nil

}
这是我应该得到的: want
这就是我所拥有的: have

Answer 1

这是一些示例代码:

package main

import (
   "archive/tar"
   "compress/gzip"
   "io"
   "os"
   "path"
)

func extract(source string) error {
   file, err := os.Open(source)
   if err != nil { return err }
   defer file.Close()
   gzRead, err := gzip.NewReader(file)
   if err != nil { return err }
   defer gzRead.Close()
   tarRead := tar.NewReader(gzRead)
   for {
      cur, err := tarRead.Next()
      if err == io.EOF { break } else if err != nil { return err }
      os.MkdirAll(path.Dir(cur.Name), os.ModeDir)
      switch cur.Typeflag {
      case tar.TypeReg:
         create, err := os.Create(cur.Name)
         if err != nil { return err }
         defer create.Close()
         create.ReadFrom(tarRead)
      case tar.TypeLink:
         os.Link(cur.Linkname, cur.Name)
      }
   }
   return nil
}

用法:

package main

func main() {
   extract("clamav-0.103.1.tar.gz")
}