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unzip.go
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unzip.go
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package utils
import (
"archive/zip"
"errors"
"io"
"os"
"strings"
)
type Unzip struct {
zipFile string
targetDir string
stripPrefix string
}
func NewUnzip(zipFile string, targetDir string, stripPrefix string) *Unzip {
return &Unzip{
zipFile: zipFile,
targetDir: targetDir,
stripPrefix: stripPrefix,
}
}
func (this *Unzip) Run() error {
if len(this.zipFile) == 0 {
return errors.New("zip file should not be empty")
}
if len(this.targetDir) == 0 {
return errors.New("target dir should not be empty")
}
reader, err := zip.OpenReader(this.zipFile)
if err != nil {
return err
}
defer func() {
_ = reader.Close()
}()
for _, file := range reader.File {
info := file.FileInfo()
filename := file.Name
if len(this.stripPrefix) > 0 {
filename = strings.TrimPrefix(filename, this.stripPrefix)
}
target := this.targetDir + "/" + filename
// 目录
if info.IsDir() {
stat, err := os.Stat(target)
if err != nil {
if !os.IsNotExist(err) {
return err
} else {
err = os.MkdirAll(target, info.Mode())
if err != nil {
return err
}
}
} else if !stat.IsDir() {
err = os.MkdirAll(target, info.Mode())
if err != nil {
return err
}
}
continue
}
// 文件
err := func(file *zip.File, target string) error {
fileReader, err := file.Open()
if err != nil {
return err
}
defer func() {
_ = fileReader.Close()
}()
fileWriter, err := os.OpenFile(target, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, file.FileInfo().Mode())
if err != nil {
return err
}
defer func() {
_ = fileWriter.Close()
}()
_, err = io.Copy(fileWriter, fileReader)
return err
}(file, target)
if err != nil {
return err
}
}
return nil
}