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zip.go
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zip.go
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package mob
import (
"archive/zip"
"fmt"
"github.com/guestin/mob/mio"
"io"
"os"
"path/filepath"
)
type zipFileItem struct {
rawFileName string
inZipFileName string
}
type FileGroup struct {
rawDir string
dirName string
childFiles []*zipFileItem
childFileGroups []*FileGroup
}
func (this *FileGroup) GetDirName() string {
return this.dirName
}
func (this *FileGroup) SetCustomDirName(dirName string) *FileGroup {
this.dirName = dirName + separatorStr
return this
}
const separatorStr = string(filepath.Separator)
func NewFileGroup(dir string, childFiles ...string) *FileGroup {
out := &FileGroup{
rawDir: dir,
dirName: "",
childFiles: nil,
}
if len(dir) != 0 {
out.dirName = fmt.Sprintf("%s%c", filepath.Base(dir), filepath.Separator)
}
if len(childFiles) == 0 {
return out
}
out.childFiles = make([]*zipFileItem, 0, len(childFiles))
for idx := range childFiles {
_ = out.AddFileItem(childFiles[idx])
}
return out
}
func (this *FileGroup) addChildFileGroup(fg FileGroup) {
fg.rawDir = filepath.Join(this.rawDir, filepath.Base(fg.rawDir))
fg.dirName = filepath.Join(this.dirName, fg.dirName) + separatorStr
this.childFileGroups = append(this.childFileGroups, &fg)
}
func (this *FileGroup) AddChildFileGroup(fgs ...*FileGroup) *FileGroup {
if this.childFileGroups == nil {
this.childFileGroups = make([]*FileGroup, 0, len(fgs))
}
for _, fg := range fgs {
this.addChildFileGroup(*fg)
}
return this
}
func (this *FileGroup) AddFileItem(file string) *FileGroup {
baseName := filepath.Base(file)
this.childFiles = append(this.childFiles, &zipFileItem{
rawFileName: baseName,
inZipFileName: baseName,
})
return this
}
func (this *FileGroup) AddFileItemWithAlias(file, alias string) *FileGroup {
baseName := filepath.Base(file)
this.childFiles = append(this.childFiles, &zipFileItem{
rawFileName: baseName,
inZipFileName: alias,
})
return this
}
func zipFilesDetails(zipWriter *zip.Writer, fgs []*FileGroup) error {
curDir := "."
for _, fg := range fgs {
if len(fg.dirName) != 0 {
_, err := zipWriter.Create(fg.dirName)
if err != nil {
return err
}
curDir = fg.dirName
} else {
curDir = "."
}
for _, it := range fg.childFiles {
writer, err := zipWriter.Create(filepath.Join(curDir, it.inZipFileName))
if err != nil {
return err
}
file, err := os.Open(filepath.Join(fg.rawDir, it.rawFileName))
if err != nil {
return err
}
_, err = io.Copy(writer, file)
if err != nil {
_ = file.Close()
return err
}
_ = file.Close()
}
if len(fg.childFileGroups) == 0 {
continue
}
err := zipFilesDetails(zipWriter, fg.childFileGroups)
if err != nil {
return err
}
}
return nil
}
func Zip(output io.Writer, fgs []*FileGroup) error {
zipWriter := zip.NewWriter(output)
defer mio.CloseIgnoreErr(zipWriter) // implicit flush to file
return zipFilesDetails(zipWriter, fgs)
}
func unzipEntry(f *zip.File, output string) error {
info := f.FileInfo()
mode := info.Mode()
outputTarget := filepath.Join(output, f.Name)
if info.IsDir() {
err := os.MkdirAll(outputTarget, mode|0755)
if err != nil {
return err
}
return nil
}
file, err := os.OpenFile(
outputTarget,
os.O_CREATE|os.O_TRUNC|os.O_WRONLY,
mode|0766)
if err != nil {
return err
}
defer mio.CloseIgnoreErr(file)
rc, err := f.Open()
if err != nil {
return err
}
defer mio.CloseIgnoreErr(rc)
_, err = io.Copy(file, rc)
if err != nil {
return err
}
return nil
}
func UnZip(zipFilePath, output string) error {
zrc, err := zip.OpenReader(zipFilePath)
if err != nil {
return err
}
defer mio.CloseIgnoreErr(zrc)
for _, f := range zrc.File {
if err = unzipEntry(f, output); err != nil {
return err
}
}
return nil
}