/
zip.go
183 lines (155 loc) · 3.38 KB
/
zip.go
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package croc
import (
"archive/zip"
"compress/flate"
"io"
"io/ioutil"
"os"
"path/filepath"
"strings"
log "github.com/cihub/seelog"
)
func unzipFile(src, dest string) (err error) {
r, err := zip.OpenReader(src)
if err != nil {
return
}
defer r.Close()
for _, f := range r.File {
var rc io.ReadCloser
rc, err = f.Open()
if err != nil {
return
}
defer rc.Close()
// Store filename/path for returning and using later on
fpath := filepath.Join(dest, f.Name)
log.Debugf("unzipping %s", fpath)
fpath = filepath.FromSlash(fpath)
if f.FileInfo().IsDir() {
// Make Folder
os.MkdirAll(fpath, os.ModePerm)
} else {
// Make File
if err = os.MkdirAll(filepath.Dir(fpath), os.ModePerm); err != nil {
return
}
var outFile *os.File
outFile, err = os.OpenFile(fpath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
if err != nil {
return
}
_, err = io.Copy(outFile, rc)
// Close the file without defer to close before next iteration of loop
outFile.Close()
if err != nil {
return
}
}
}
if err == nil {
log.Debugf("unzipped %s to %s", src, dest)
}
return
}
func zipFile(fname string, compress bool) (writtenFilename string, err error) {
log.Debugf("zipping %s with compression? %v", fname, compress)
pathtofile, filename := filepath.Split(fname)
curdir, err := os.Getwd()
if err != nil {
log.Error(err)
return
}
curdir, err = filepath.Abs(curdir)
if err != nil {
log.Error(err)
return
}
log.Debugf("current directory: %s", curdir)
newfile, err := ioutil.TempFile(curdir, "croc-zipped")
if err != nil {
log.Error(err)
return
}
writtenFilename = newfile.Name()
defer newfile.Close()
defer os.Chdir(curdir)
log.Debugf("changing dir to %s", pathtofile)
os.Chdir(pathtofile)
zipWriter := zip.NewWriter(newfile)
zipWriter.RegisterCompressor(zip.Deflate, func(out io.Writer) (io.WriteCloser, error) {
if compress {
return flate.NewWriter(out, flate.BestSpeed)
} else {
return flate.NewWriter(out, flate.NoCompression)
}
})
defer zipWriter.Close()
zipfile, err := os.Open(filename)
if err != nil {
log.Error(err)
return "", err
}
defer zipfile.Close()
// Get the file information
info, err := zipfile.Stat()
if err != nil {
log.Error(err)
return
}
// write header informaiton
header, err := zip.FileInfoHeader(info)
if err != nil {
log.Error(err)
return
}
var writer io.Writer
if info.IsDir() {
baseDir := filename
filepath.Walk(baseDir, 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(baseDir, strings.TrimPrefix(path, baseDir))
}
if info.IsDir() {
header.Name += "/"
} else {
header.Method = zip.Deflate
}
header.Name = filepath.ToSlash(header.Name)
writer, err = zipWriter.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
})
} else {
writer, err = zipWriter.CreateHeader(header)
if err != nil {
log.Error(err)
return
}
_, err = io.Copy(writer, zipfile)
if err != nil {
log.Error(err)
return
}
}
log.Debugf("wrote zip file to %s", writtenFilename)
return
}