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base.go
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base.go
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package ziputil
import (
"archive/zip"
"io"
"io/ioutil"
"os"
"path"
"path/filepath"
"strings"
"github.com/yaklang/yaklang/common/log"
"github.com/yaklang/yaklang/common/utils"
"github.com/yaklang/yaklang/common/utils/memfile"
)
// 压缩文件
// files 文件数组,可以是不同dir下的文件或者文件夹
// dest 压缩文件存放地址
func Compress(files []*os.File, dest string) error {
d, _ := os.Create(dest)
defer d.Close()
w := zip.NewWriter(d)
defer w.Close()
for _, file := range files {
err := compress(file, "", w)
if err != nil {
return err
}
}
return nil
}
func CompressByName(files []string, dest string) error {
if utils.GetFirstExistedPath(dest) != "" {
return utils.Errorf("dest[%s] is existed", dest)
}
d, err := os.Create(dest)
if err != nil {
return utils.Errorf("create zip dest:%v failed: %s", dest, err)
}
defer d.Close()
zipWriter := zip.NewWriter(d)
defer zipWriter.Close()
compressFile := func(filename string) error {
log.Infof("zip compress %s", filename)
fileFp, err := os.Open(filename)
if err != nil {
return utils.Errorf("cannot open[%s] as fp: %s", filename, err)
}
defer fileFp.Close()
state, err := fileFp.Stat()
if err != nil {
return utils.Errorf("cannot fetch filefp stats: %s", err)
}
header, err := zip.FileInfoHeader(state)
if err != nil {
return utils.Errorf("file info reader create failed: %s", err)
}
header.Name = path.Join(".", filename)
fpWriter, err := zipWriter.CreateHeader(header)
if err != nil {
return utils.Errorf("zip create header failed: %s", err)
}
if !state.IsDir() {
_, err = io.Copy(fpWriter, fileFp)
if err != nil {
return utils.Errorf("compress file content failed: %s", err)
}
}
return nil
}
for _, filename := range files {
if strings.Contains(filename, "..") {
return utils.Errorf("filename[%s] invalid: %s", filename, "cannot contains `..`")
}
if utils.IsFile(filename) {
err := compressFile(filename)
if err != nil {
return err
}
}
if utils.IsDir(filename) {
absPathName, _ := filepath.Abs(filename)
if absPathName == "" {
absPathName = filename
}
absPath := filepath.IsAbs(filename)
var baseDir = filename
if absPath {
baseDir = absPathName
} else {
baseDir = filename
}
infos, err := utils.ReadFilesRecursively(baseDir)
if err != nil {
return utils.Errorf("read dirs[%s] failed: %s", baseDir, err)
}
for _, info := range infos {
rPath := info.Path
if !absPath {
if strings.HasPrefix(rPath, absPathName) {
rPath = rPath[len(absPathName):]
rPath = filepath.Join(filename, rPath)
}
}
log.Infof("found file(dir: %v): %s[%v]", info.IsDir, info.Name, rPath)
err := compressFile(rPath)
if err != nil {
return utils.Errorf("compress path[%s] in dir[%s] failed: %s", rPath, absPathName, err)
}
}
continue
}
}
return nil
}
func compress(file *os.File, prefix string, zw *zip.Writer) error {
info, err := file.Stat()
if err != nil {
return err
}
if info.IsDir() {
prefix = prefix + "/" + info.Name()
fileInfos, err := file.Readdir(-1)
if err != nil {
return err
}
for _, fi := range fileInfos {
f, err := os.Open(file.Name() + "/" + fi.Name())
if err != nil {
return err
}
err = compress(f, prefix, zw)
if err != nil {
return err
}
}
} else {
header, err := zip.FileInfoHeader(info)
header.Name = prefix + "/" + header.Name
if err != nil {
return err
}
writer, err := zw.CreateHeader(header)
if err != nil {
return err
}
_, err = io.Copy(writer, file)
file.Close()
if err != nil {
return err
}
}
return nil
}
func DeCompressFromRaw(raw []byte, dest string) error {
absDestFull, err := filepath.Abs(dest)
if err != nil {
return utils.Errorf("cannot found dest(%s) abspath: %s", dest, err)
}
_ = os.MkdirAll(absDestFull, 0777)
size := len(raw)
mfile := memfile.New(raw)
reader, err := zip.NewReader(mfile, int64(size))
if err != nil {
return utils.Errorf("create zip reader failed: %s", err)
}
for _, file := range reader.File {
filename := filepath.Join(dest, file.Name)
filenameAbs, err := filepath.Abs(filename)
if err != nil {
return utils.Errorf("cannot convert %s as abs path: %s", err)
}
if !strings.HasPrefix(filenameAbs, absDestFull) {
return utils.Errorf("extract file(%s) [abs:%s] is not in [%s]", filename, filenameAbs, absDestFull)
}
if file.FileInfo().IsDir() {
err := os.MkdirAll(filename, 0777)
if err != nil {
return utils.Errorf("mkdir failed: %s")
}
continue
}
dirName := filepath.Dir(filename)
err = os.MkdirAll(dirName, 0777)
if err != nil {
log.Errorf("mkdir [%s] failed: %s", dirName, err)
return err
}
// 打开需要解压的文件
rc, err := file.Open()
if err != nil {
return err
}
w, err := os.Create(filename)
if err != nil {
rc.Close()
return err
}
_, err = io.Copy(w, rc)
w.Close()
rc.Close()
if err != nil {
return err
}
}
return nil
}
// 解压
func DeCompress(zipFile, dest string) error {
raw, err := ioutil.ReadFile(zipFile)
if err != nil {
return err
}
return DeCompressFromRaw(raw, dest)
}