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zip.go
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zip.go
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package gZip
import (
"archive/zip"
"io"
"os"
"strings"
)
// 压缩
func Zip(filePaths []string, dest string) error {
files := make([]*os.File, 0)
for _, path := range filePaths {
fileIn, err := os.Open(path)
if err == nil {
files = append(files, fileIn)
defer fileIn.Close()
}
}
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 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
}
// 解压
func UnZip(zipFile, dest string) error {
reader, err := zip.OpenReader(zipFile)
if err != nil {
return err
}
defer reader.Close()
for _, file := range reader.File {
rc, err := file.Open()
if err != nil {
return err
}
defer rc.Close()
filename := dest + file.Name
err = os.MkdirAll(getDir(filename), 0755)
if err != nil {
return err
}
w, err := os.Create(filename)
if err != nil {
return err
}
defer w.Close()
_, err = io.Copy(w, rc)
if err != nil {
return err
}
w.Close()
rc.Close()
}
return nil
}
func getDir(path string) string {
return subString(path, 0, strings.LastIndex(path, "/"))
}
func subString(str string, start, end int) string {
rs := []rune(str)
length := len(rs)
if start < 0 || start > length {
panic("start is wrong")
}
if end < start || end > length {
panic("end is wrong")
}
return string(rs[start:end])
}