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zipper.go
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zipper.go
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package zgok
import (
"archive/zip"
"bytes"
"fmt"
"io/ioutil"
"os"
"path/filepath"
)
type Zipper struct {
isClosed bool // Is the zip file closed?
buffer *bytes.Buffer // Buffer.
writer *zip.Writer // Zip writer.
basePath string // Base path.
}
// Create new zipper.
func NewZipper() *Zipper {
z := &Zipper{}
z.isClosed = false
z.basePath = "zgok"
z.buffer = new(bytes.Buffer)
z.writer = zip.NewWriter(z.buffer)
return z
}
// Add files in the path to zip.
func (z *Zipper) Add(path string) error {
// Check if zip is closed or not.
if z.isClosed {
return fmt.Errorf("zip already closed")
}
// Get file information.
fileInfo, err := os.Stat(path)
if err != nil {
return err
}
// Determine if the path is a directory or not.
if fileInfo.IsDir() {
err = z.addDir(path)
} else {
err = z.addFile(path)
}
if err != nil {
return err
}
return nil
}
// Close zip writer.
func (z *Zipper) Close() error {
err := z.writer.Close()
if err != nil {
return err
}
z.isClosed = true
return nil
}
// Get bytes of zip.
func (z *Zipper) Bytes() ([]byte, error) {
if !z.isClosed {
return []byte{}, fmt.Errorf("zip not closed")
}
return z.buffer.Bytes(), nil
}
// Add file to zip.
func (z *Zipper) addFile(filePath string) error {
// Get file information.
fileInfo, err := os.Stat(filePath)
if err != nil {
return err
}
// Get file content.
content, err := ioutil.ReadFile(filePath)
if err != nil {
return err
}
// Set zip header.
header, _ := zip.FileInfoHeader(fileInfo)
path := filepath.Join(z.basePath, filePath)
header.Name = path
zipFile, err := z.writer.CreateHeader(header)
if err != nil {
return err
}
// Write content.
_, err = zipFile.Write(content)
if err != nil {
return err
}
return nil
}
// Add directory to zip.
func (z *Zipper) addDir(dirPath string) error {
// Walk through all the files in the directory.
err := filepath.Walk(dirPath,
func(path string, info os.FileInfo, err error) error {
// Do nothing on directory.
if info.IsDir() {
return nil
}
// Add file to zip.
if err := z.addFile(path); err != nil {
return err
}
return nil
})
return err
}