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compress.go
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compress.go
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package zfile
import (
"archive/tar"
"archive/zip"
"compress/gzip"
"io"
"os"
"path/filepath"
"strings"
)
// GzCompress use gzip to compress to tar.gz
func GzCompress(currentPath, dest string) (err error) {
dest = RealPath(dest)
var d *os.File
d, err = os.Create(dest)
if err != nil {
return
}
defer d.Close()
gw := gzip.NewWriter(d)
defer gw.Close()
tw := tar.NewWriter(gw)
defer tw.Close()
currentPath = RealPath(currentPath, true)
err = walkFile(currentPath, dest, err, func(path string, info *os.FileInfo) error {
header, err := tar.FileInfoHeader(*info, "")
if err != nil {
return err
}
header.Name = strings.Replace(path, currentPath, "", -1)
err = tw.WriteHeader(header)
if err != nil {
return err
}
var file *os.File
file, err = os.Open(path)
if err != nil {
return err
}
_, err = io.Copy(tw, file)
file.Close()
return err
})
return
}
func walkFile(currentPath string, dest string, err error, writer func(path string, info *os.FileInfo) error) error {
return filepath.Walk(currentPath,
func(path string, info os.FileInfo, err error) error {
path = RealPath(path)
if info == nil || err != nil {
return err
}
if info.IsDir() || path == dest {
return nil
}
return writer(path, &info)
})
}
// GzDeCompress unzip tar.gz
func GzDeCompress(tarFile, dest string) error {
dest = RealPath(dest, true)
tarFile = RealPath(tarFile)
srcFile, err := os.Open(tarFile)
if err != nil {
return err
}
defer srcFile.Close()
gr, err := gzip.NewReader(srcFile)
if err != nil {
return err
}
defer gr.Close()
tr := tar.NewReader(gr)
for {
hdr, err := tr.Next()
if err != nil {
if err == io.EOF {
break
} else {
return err
}
}
i := hdr.FileInfo()
filename := dest + hdr.Name
if i.IsDir() {
_ = createDir(filename, i.Mode())
} else {
file, err := createFile(filename)
if err != nil {
return err
}
_, err = io.Copy(file, tr)
_ = file.Close()
if err != nil {
return err
}
}
}
return nil
}
// ZipCompress zip
func ZipCompress(currentPath, dest string) (err error) {
dest = RealPath(dest)
var d *os.File
d, err = os.Create(dest)
if err != nil {
return
}
defer d.Close()
tw := zip.NewWriter(d)
defer tw.Close()
currentPath = RealPath(currentPath, true)
err = walkFile(currentPath, dest, err, func(path string, info *os.FileInfo) error {
header, err := zip.FileInfoHeader(*info)
if err != nil {
return err
}
header.Name = strings.Replace(path, currentPath, "", -1)
writer, err := tw.CreateHeader(header)
if err != nil {
return err
}
var file *os.File
file, err = os.Open(path)
if err != nil {
return err
}
_, err = io.Copy(writer, file)
_ = file.Close()
return err
})
return err
}
func ZipDeCompress(zipFile, dest string) error {
dest = RealPath(dest, true)
zipFile = RealPath(zipFile)
reader, err := zip.OpenReader(zipFile)
if err != nil {
return err
}
defer reader.Close()
for _, file := range reader.File {
rc, err := file.Open()
if err != nil {
return err
}
filename := dest + file.Name
if file.FileInfo().IsDir() {
_ = createDir(filename, file.FileInfo().Mode())
continue
}
w, err := createFile(filename)
if err != nil {
_ = rc.Close()
return err
}
_, err = io.Copy(w, rc)
_ = w.Close()
_ = rc.Close()
if err != nil {
return err
}
}
return nil
}
func createDir(dir string, perm os.FileMode) error {
if perm == 0 {
perm = 0755
}
return os.MkdirAll(dir, perm)
}
func createFile(name string) (*os.File, error) {
dir := string([]rune(name)[0:strings.LastIndex(name, "/")])
if !DirExist(dir) {
err := createDir(dir, 0)
if err != nil {
return nil, err
}
}
return os.Create(name)
}