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|
package upload
import (
"archive/zip"
"fmt"
"io"
"mime/multipart"
"os"
"path"
"path/filepath"
"strings"
"github.com/LMBishop/scrapbook/pkg/index"
)
func HandleUpload(siteName string, reader *multipart.Reader, index *index.SiteIndex) (string, error) {
s := index.GetSite(siteName)
if s == nil {
return "", fmt.Errorf("no such site: %s", siteName)
}
temp, err := os.CreateTemp(os.TempDir(), "scrapbook")
if err != nil {
return "", fmt.Errorf("failed to create temporary file: %w", err)
}
defer func() {
temp.Close()
os.Remove(temp.Name())
}()
for {
part, err := reader.NextPart()
if err == io.EOF {
break
} else if err != nil {
return "", fmt.Errorf("failed to read multipart stream: %w", err)
}
if part.FormName() == "upload" {
io.Copy(temp, part)
}
}
zipReader, err := zip.OpenReader(temp.Name())
if err != nil {
return "", fmt.Errorf("failed to open zip reader: %w", err)
}
defer zipReader.Close()
version, err := s.CreateNewVersion()
if err != nil {
return "", fmt.Errorf("failed to create new version: %w", err)
}
versionDir := path.Join(s.Path, version)
err = unzipSource(temp.Name(), versionDir)
if err != nil {
return "", fmt.Errorf("failed to unzip archive: %w", err)
}
err = s.UpdateVersion(version)
if err != nil {
return "", fmt.Errorf("failed to update version: %w", err)
}
return version, nil
}
// https://gosamples.dev/unzip-file/
func unzipSource(source, destination string) error {
reader, err := zip.OpenReader(source)
if err != nil {
return err
}
defer reader.Close()
destination, err = filepath.Abs(destination)
if err != nil {
return err
}
for _, f := range reader.File {
err := unzipFile(f, destination)
if err != nil {
return err
}
}
return nil
}
func unzipFile(f *zip.File, destination string) error {
filePath := filepath.Join(destination, f.Name)
if !strings.HasPrefix(filePath, filepath.Clean(destination)+string(os.PathSeparator)) {
return fmt.Errorf("invalid file path: %s", filePath)
}
if f.FileInfo().IsDir() {
if err := os.MkdirAll(filePath, os.ModePerm); err != nil {
return err
}
return nil
}
if err := os.MkdirAll(filepath.Dir(filePath), os.ModePerm); err != nil {
return err
}
destinationFile, err := os.OpenFile(filePath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
if err != nil {
return err
}
defer destinationFile.Close()
zippedFile, err := f.Open()
if err != nil {
return err
}
defer zippedFile.Close()
if _, err := io.Copy(destinationFile, zippedFile); err != nil {
return err
}
return nil
}
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