/
file.go
276 lines (237 loc) · 5.5 KB
/
file.go
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package file
import (
"archive/zip"
"encoding/base64"
"fmt"
"github.com/go-errors/errors"
"io"
"io/fs"
"os"
"path/filepath"
"strings"
)
func CopyFile(src, dst string) (err error) {
// Reference - https://gist.github.com/r0l1/92462b38df26839a3ca324697c8cba04
in, err := os.Open(src)
if err != nil {
return errors.Wrap(err, 0)
}
defer in.Close()
// Create directory for target file if it doesn't exist yet
err = os.MkdirAll(filepath.Dir(dst), os.ModePerm)
if err != nil {
return errors.Wrap(err, 0)
}
out, err := os.Create(dst)
if err != nil {
return errors.Wrap(err, 0)
}
defer func() {
if e := out.Close(); e != nil {
err = errors.Wrap(e, 0)
}
}()
_, err = io.Copy(out, in)
if err != nil {
return errors.Wrap(err, 0)
}
err = out.Sync()
if err != nil {
return errors.Wrap(err, 0)
}
si, err := os.Stat(src)
if err != nil {
return errors.Wrap(err, 0)
}
err = os.Chmod(dst, si.Mode())
if err != nil {
return errors.Wrap(err, 0)
}
return
}
func copyDir(src string, dst string) (err error) {
src = filepath.Clean(src)
dst = filepath.Clean(dst)
si, err := os.Stat(src)
if err != nil {
return errors.Wrap(err, 0)
}
if !si.IsDir() {
return fmt.Errorf("source is not a directory")
}
_, err = os.Stat(dst)
if err != nil && errors.Is(err, fs.ErrExist) {
return errors.Wrap(err, 0)
}
if err == nil {
return fmt.Errorf("destination already exists")
}
err = os.MkdirAll(dst, si.Mode())
if err != nil {
return errors.Wrap(err, 0)
}
entries, err := os.ReadDir(src)
if err != nil {
return errors.Wrap(err, 0)
}
for _, entry := range entries {
srcPath := filepath.Join(src, entry.Name())
dstPath := filepath.Join(dst, entry.Name())
if entry.IsDir() {
err = copyDir(srcPath, dstPath)
if err != nil {
return
}
} else {
// Skip symlinks.
if entry.Type() == fs.ModeSymlink {
continue
}
err = CopyFile(srcPath, dstPath)
if err != nil {
return
}
}
}
return
}
func UnzipSource(source, destination string) (err error) {
// 1. Open the zip file
reader, err := zip.OpenReader(source)
if err != nil {
return errors.Wrap(err, 0)
}
defer reader.Close()
// 2. Get the absolute destination path
destination, err = filepath.Abs(destination)
if err != nil {
return errors.Wrap(err, 0)
}
// 3. Iterate over zip files inside the archive and unzip each of them
for _, f := range reader.File {
err = unzipFile(f, destination)
if err != nil {
return
}
}
return
}
func unzipFile(f *zip.File, destination string) (err error) {
// 4. Check if file paths are not vulnerable to Zip Slip
filePath := filepath.Join(destination, f.Name)
if !strings.HasPrefix(filePath, filepath.Clean(destination)+string(os.PathSeparator)) {
return fmt.Errorf("invalid file path: %s", filePath)
}
// 5. Create directory tree
if f.FileInfo().IsDir() {
if err = os.MkdirAll(filePath, os.ModePerm); err != nil {
return errors.Wrap(err, 0)
}
return
}
if err = os.MkdirAll(filepath.Dir(filePath), os.ModePerm); err != nil {
return errors.Wrap(err, 0)
}
// 6. Create a destination file for unzipped content
destinationFile, err := os.OpenFile(filePath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
if err != nil {
return errors.Wrap(err, 0)
}
defer destinationFile.Close()
// 7. Unzip the content of a file and copy it to the destination file
zippedFile, err := f.Open()
if err != nil {
return errors.Wrap(err, 0)
}
defer zippedFile.Close()
if _, err = io.Copy(destinationFile, zippedFile); err != nil {
return errors.Wrap(err, 0)
}
return
}
func Exists(filePath string) bool {
_, err := os.Stat(filePath)
return !errors.Is(err, os.ErrNotExist)
}
func ReplaceDir(src string, dst string) (err error) {
err = os.RemoveAll(dst)
if err != nil {
return errors.Wrap(err, 0)
}
return copyDir(src, dst)
}
// ZipDir Compress a directory into a zip file
func ZipDir(src string, dst string, includeSrc bool) error {
// Create directory for target file if it doesn't exist yet
err := os.MkdirAll(filepath.Dir(dst), os.ModePerm)
if err != nil {
return errors.Wrap(err, 0)
}
zipfile, err := os.Create(dst)
if err != nil {
return errors.Wrap(err, 0)
}
defer zipfile.Close()
archive := zip.NewWriter(zipfile)
defer archive.Close()
filepath.Walk(src, func(path string, info os.FileInfo, err error) error {
if err != nil {
return errors.Wrap(err, 0)
}
var name string
header, err := zip.FileInfoHeader(info)
if err != nil {
return errors.Wrap(err, 0)
}
if includeSrc {
name, err = filepath.Rel(filepath.Dir(src), path)
if err != nil {
return errors.Wrap(err, 0)
}
} else {
if path == src {
return nil
}
name, err = filepath.Rel(src, path)
if err != nil {
return errors.Wrap(err, 0)
}
}
header.Name = filepath.ToSlash(name)
if info.IsDir() {
header.Name += "/"
} else {
header.Method = zip.Deflate
}
writer, err := archive.CreateHeader(header)
if err != nil {
return errors.Wrap(err, 0)
}
if !info.IsDir() {
file, err := os.Open(path)
if err != nil {
return errors.Wrap(err, 0)
}
defer file.Close()
_, err = io.Copy(writer, file)
}
return err
})
return err
}
func ZipDirToBase64(src string) (string, error) {
zipFile := src + ".zip"
err := ZipDir(src, zipFile, false)
if err != nil {
return "", err
}
fileContent, err := os.ReadFile(zipFile)
if err != nil {
return "", errors.Wrap(err, 0)
}
err = os.Remove(zipFile)
if err != nil {
return "", errors.Wrap(err, 0)
}
return base64.StdEncoding.EncodeToString(fileContent), nil
}