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package filesystem
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import (
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"archive/zip"
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"context"
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"fmt"
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model "github.com/HFO4/cloudreve/models"
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"github.com/HFO4/cloudreve/pkg/util"
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"io"
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"path/filepath"
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"time"
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)
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/* ===============
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压缩/解压缩
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===============
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*/
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// Compress 创建给定目录和文件的压缩文件
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func (fs *FileSystem) Compress(ctx context.Context, folderIDs, fileIDs []uint) (string, error) {
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// 查找待压缩目录
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folders, err := model.GetFoldersByIDs(folderIDs, fs.User.ID)
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if err != nil && len(folders) != 0 {
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return "", ErrDBListObjects
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}
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// 查找待压缩文件
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files, err := model.GetFilesByIDs(fileIDs, fs.User.ID)
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if err != nil && len(files) != 0 {
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return "", ErrDBListObjects
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}
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// 将顶级待处理对象的路径设为根路径
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for i := 0; i < len(folders); i++ {
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folders[i].Position = ""
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}
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for i := 0; i < len(files); i++ {
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files[i].Position = ""
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}
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// 创建临时压缩文件
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zipFilePath := filepath.Join(
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model.GetSettingByName("temp_path"),
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fmt.Sprintf("archive_%d.zip", time.Now().UnixNano()),
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)
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zipFile, err := util.CreatNestedFile(zipFilePath)
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if err != nil {
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util.Log().Warning("%s", err)
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return "", err
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}
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defer zipFile.Close()
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// 创建压缩文件Writer
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zipWriter := zip.NewWriter(zipFile)
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defer zipWriter.Close()
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ctx, _ = context.WithCancel(context.Background())
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// 压缩各个目录及文件
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for i := 0; i < len(folders); i++ {
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fs.doCompress(ctx, nil, &folders[i], zipWriter, true)
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}
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for i := 0; i < len(files); i++ {
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fs.doCompress(ctx, &files[i], nil, zipWriter, true)
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}
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return zipFilePath, nil
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}
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func (fs *FileSystem) doCompress(ctx context.Context, file *model.File, folder *model.Folder, zipWriter *zip.Writer, isArchive bool) {
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// 如果对象是文件
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if file != nil {
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// 切换上传策略
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fs.Policy = file.GetPolicy()
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err := fs.dispatchHandler()
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if err != nil {
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util.Log().Warning("无法压缩文件%s，%s", file.Name, err)
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return
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}
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// 获取文件内容
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fileToZip, err := fs.Handler.Get(ctx, file.SourceName)
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if err != nil {
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util.Log().Debug("Open%s，%s", file.Name, err)
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return
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}
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if closer, ok := fileToZip.(io.Closer); ok {
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defer closer.Close()
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}
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// 创建压缩文件头
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header := &zip.FileHeader{
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Name: filepath.Join(file.Position, file.Name),
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Modified: file.UpdatedAt,
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UncompressedSize64: file.Size,
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}
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// 指定是压缩还是归档
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if isArchive {
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header.Method = zip.Store
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} else {
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header.Method = zip.Deflate
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}
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writer, err := zipWriter.CreateHeader(header)
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if err != nil {
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return
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}
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_, err = io.Copy(writer, fileToZip)
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} else if folder != nil {
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// 对象是目录
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// 获取子文件
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subFiles, err := folder.GetChildFiles()
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if err == nil && len(subFiles) > 0 {
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for i := 0; i < len(subFiles); i++ {
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fs.doCompress(ctx, &subFiles[i], nil, zipWriter, isArchive)
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}
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}
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// 获取子目录，继续递归遍历
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subFolders, err := folder.GetChildFolder()
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if err == nil && len(subFolders) > 0 {
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for i := 0; i < len(subFolders); i++ {
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fs.doCompress(ctx, nil, &subFolders[i], zipWriter, isArchive)
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}
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}
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}
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}
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