extractor.go

package fileio

import (
	"archive/zip"
	"fmt"
	"io"
	"os"
	"path/filepath"
	"strings"
)

type MizZipper interface {
	Unzip(zipfile string, tmpDestFolder string) ([]string, error)
	Zip(targetFolder string)
}

type dcsMizZipper struct {}

func NewDcsMizZipper() MizZipper {
	return dcsMizZipper{}
}

func (m dcsMizZipper) Unzip(zipfile string, tmpDestFolder string) ([]string, error) {
	readcloser, _ := zip.OpenReader(zipfile)
	defer readcloser.Close()
	var filenames []string

	for _, f := range readcloser.File {
		filename := filepath.Join(tmpDestFolder, f.Name)
		err := os.MkdirAll(filepath.Dir(filename), os.ModePerm)
		if err != nil {
			return filenames, err
		}

		newFile, err := os.OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
		if err != nil {
			return filenames, err
		}

		rc, err := f.Open()
		if err != nil {
			return filenames, err
		}

		_, err = io.Copy(newFile, rc)
		filenames = append(filenames,filename)
		newFile.Close()
		rc.Close()
		if err != nil {
			return filenames, err
		}
	}

	return filenames, nil
}

func (m dcsMizZipper) Zip(targetFolder string) {
	newZipFile, err := os.Create(d.Zipfile + "_copy")
	if err != nil {
		panic(err)
	}
	defer newZipFile.Close()

	zipWriter := zip.NewWriter(newZipFile)
	defer zipWriter.Close()
	err = filepath.Walk(targetFolder, func(path string, info os.FileInfo, err error) error {
		if !info.IsDir() {
			file, err := os.Open(path)
			if err != nil {
				panic(err)
			}
			defer file.Close()

			newInfo, err := file.Stat()
			header, err := zip.FileInfoHeader(newInfo)
			if err != nil {
				panic(err)
			}
			header.Method = zip.Deflate
			header.Name = strings.ReplaceAll(filepath.Clean(path), targetFolder + "\\", "")
			fmt.Println(header.Name)

			writer, err := zipWriter.CreateHeader(header)
			if err != nil {
				panic(err)
			}

			_, err = io.Copy(writer, file)
			if err != nil {
				panic(err)
			}
		}
		return nil
	})
	if err != nil {
		panic(err)
	}
}