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compression.go
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185 lines (140 loc) · 2.84 KB
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package src
import (
"archive/zip"
"bytes"
"compress/gzip"
"io"
"os"
"path/filepath"
"strings"
)
func zipFiles(sourceFiles []string, target string) error {
zipfile, err := os.Create(target)
if err != nil {
return err
}
defer zipfile.Close()
archive := zip.NewWriter(zipfile)
defer archive.Close()
for _, source := range sourceFiles {
info, err := os.Stat(source)
if err != nil {
return nil
}
var baseDir string
if info.IsDir() {
baseDir = filepath.Base(System.Folder.Data)
}
filepath.Walk(source, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
header, err := zip.FileInfoHeader(info)
if err != nil {
return err
}
if baseDir != "" {
header.Name = filepath.Join(strings.TrimPrefix(path, System.Folder.Config))
}
if info.IsDir() {
header.Name += string(os.PathSeparator)
} else {
header.Method = zip.Deflate
}
writer, err := archive.CreateHeader(header)
if err != nil {
return err
}
if info.IsDir() {
return nil
}
file, err := os.Open(path)
if err != nil {
return err
}
defer file.Close()
_, err = io.Copy(writer, file)
return err
})
}
return err
}
func extractZIP(archive, target string) (err error) {
reader, err := zip.OpenReader(archive)
if err != nil {
return err
}
if err := os.MkdirAll(target, 0755); err != nil {
return err
}
for _, file := range reader.File {
path := filepath.Join(target, file.Name)
if file.FileInfo().IsDir() {
os.MkdirAll(path, file.Mode())
continue
}
fileReader, err := file.Open()
if err != nil {
return err
}
defer fileReader.Close()
targetFile, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, file.Mode())
if err != nil {
return err
}
defer targetFile.Close()
if _, err := io.Copy(targetFile, fileReader); err != nil {
return err
}
}
return
}
func extractGZIP(gzipBody []byte, fileSource string) (body []byte, err error) {
var b = bytes.NewBuffer(gzipBody)
var r io.Reader
r, err = gzip.NewReader(b)
if err != nil {
// Keine gzip Datei
body = gzipBody
err = nil
return
}
showInfo("Extract gzip:" + fileSource)
var resB bytes.Buffer
_, err = resB.ReadFrom(r)
if err != nil {
body = gzipBody
err = nil
return
}
body = resB.Bytes()
return
}
func compressGZIP(data *[]byte, file string) (err error) {
if len(file) != 0 {
f, err := os.Create(file)
if err != nil {
return err
}
w := gzip.NewWriter(f)
w.Write(*data)
w.Close()
}
return
}
func compressGZIPFile(sourcePath, targetPath string) (err error) {
in, err := os.Open(sourcePath)
if err != nil {
return err
}
defer in.Close()
out, err := os.Create(targetPath)
if err != nil {
return err
}
defer out.Close()
gw := gzip.NewWriter(out)
defer gw.Close()
_, err = io.Copy(gw, in)
return err
}