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zip.go
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zip.go
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package compress
import (
"fmt"
"io"
"os"
"path/filepath"
"strings"
"github.com/klauspost/compress/zip"
zs "github.com/klauspost/compress/zstd"
"github.com/3JoB/ulib/fsutil"
)
type Zip struct{}
func NewZip() *Zip {
return &Zip{}
}
// Example:
//
// package main
//
// import (
// "fmt"
//
// "github.com/3JoB/ulib/fsutil/compress"
// "github.com/3JoB/ulib/fsutil"
// )
//
// func main() {
// //Todo:
// }
func (z Zip) Create(source string, files []string) error {
if fsutil.IsFile(source) {
os.RemoveAll(source)
}
fs, err := os.OpenFile(source, os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return err
}
encomp := zs.ZipCompressor(zs.WithEncoderLevel(zs.EncoderLevelFromZstd(17)))
w := zip.NewWriter(fs)
w.RegisterCompressor(zs.ZipMethodPKWare, encomp)
w.RegisterCompressor(zs.ZipMethodWinZip, encomp)
for _, f := range files {
ofs, err := os.OpenFile(f, os.O_RDWR, 0755)
if err != nil {
return err
}
zfs, err := w.CreateHeader(&zip.FileHeader{
Name: f,
Method: zs.ZipMethodWinZip,
})
if err != nil {
return err
}
if _, err := io.Copy(zfs, ofs); err != nil {
return err
}
ofs.Close()
}
w.Close()
return nil
}
func (z Zip) Extract(source, destination string) ([]string, error) {
decomp := zs.ZipDecompressor()
zip.RegisterDecompressor(zs.ZipMethodPKWare, decomp)
zip.RegisterDecompressor(zs.ZipMethodWinZip, decomp)
r, err := zip.OpenReader(source)
if err != nil {
return nil, err
}
defer r.Close()
if err := os.MkdirAll(destination, 0755); err != nil {
return nil, err
}
var extractedFiles []string
for _, f := range r.File {
if err := z.extractAndWriteFile(destination, f); err != nil {
return nil, err
}
extractedFiles = append(extractedFiles, f.Name)
}
return extractedFiles, nil
}
func (Zip) extractAndWriteFile(destination string, f *zip.File) error {
rc, err := f.Open()
if err != nil {
return err
}
defer rc.Close()
path := filepath.Join(destination, f.Name)
if !strings.HasPrefix(path, filepath.Clean(destination)+string(os.PathSeparator)) {
return fmt.Errorf("%s: illegal file path", path)
}
if f.FileInfo().IsDir() {
if err = os.MkdirAll(path, f.Mode()); err != nil {
return err
}
} else {
err = os.MkdirAll(filepath.Dir(path), f.Mode())
if err != nil {
return err
}
f, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
if err != nil {
return err
}
defer f.Close()
if _, err := io.Copy(f, rc); err != nil {
return err
}
}
return nil
}