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cloudreve/pkg/filesystem/archive.go

183 lines
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package filesystem
import (
"archive/zip"
"context"
"fmt"
model "github.com/HFO4/cloudreve/models"
"github.com/HFO4/cloudreve/pkg/filesystem/fsctx"
"github.com/HFO4/cloudreve/pkg/util"
"github.com/gin-gonic/gin"
"io"
"os"
"path/filepath"
"time"
)
/* ===============
压缩/解压缩
===============
*/
// Compress 创建给定目录和文件的压缩文件
func (fs *FileSystem) Compress(ctx context.Context, folderIDs, fileIDs []uint) (string, error) {
// 查找待压缩目录
folders, err := model.GetFoldersByIDs(folderIDs, fs.User.ID)
if err != nil && len(folders) != 0 {
return "", ErrDBListObjects
}
// 查找待压缩文件
files, err := model.GetFilesByIDs(fileIDs, fs.User.ID)
if err != nil && len(files) != 0 {
return "", ErrDBListObjects
}
// 如果上下文限制了父目录,则进行检查
if parent, ok := ctx.Value(fsctx.LimitParentCtx).(*model.Folder); ok {
// 检查目录
for _, folder := range folders {
if *folder.ParentID != parent.ID {
return "", ErrObjectNotExist
}
}
// 检查文件
for _, file := range files {
if file.FolderID != parent.ID {
return "", ErrObjectNotExist
}
}
}
// 尝试获取请求上下文,以便于后续检查用户取消任务
reqContext := ctx
ginCtx, ok := ctx.Value(fsctx.GinCtx).(*gin.Context)
if ok {
reqContext = ginCtx.Request.Context()
}
// 将顶级待处理对象的路径设为根路径
for i := 0; i < len(folders); i++ {
folders[i].Position = ""
}
for i := 0; i < len(files); i++ {
files[i].Position = ""
}
// 创建临时压缩文件
zipFilePath := filepath.Join(
model.GetSettingByName("temp_path"),
fmt.Sprintf("archive_%d.zip", time.Now().UnixNano()),
)
zipFile, err := util.CreatNestedFile(zipFilePath)
if err != nil {
util.Log().Warning("%s", err)
return "", err
}
defer zipFile.Close()
// 创建压缩文件Writer
zipWriter := zip.NewWriter(zipFile)
defer zipWriter.Close()
ctx = reqContext
// 压缩各个目录及文件
for i := 0; i < len(folders); i++ {
select {
case <-reqContext.Done():
// 取消压缩请求
fs.cancelCompress(ctx, zipWriter, zipFile, zipFilePath)
return "", ErrClientCanceled
default:
fs.doCompress(ctx, nil, &folders[i], zipWriter, true)
}
}
for i := 0; i < len(files); i++ {
select {
case <-reqContext.Done():
// 取消压缩请求
fs.cancelCompress(ctx, zipWriter, zipFile, zipFilePath)
return "", ErrClientCanceled
default:
fs.doCompress(ctx, &files[i], nil, zipWriter, true)
}
}
return zipFilePath, nil
}
// cancelCompress 取消压缩进程
func (fs *FileSystem) cancelCompress(ctx context.Context, zipWriter *zip.Writer, file *os.File, path string) {
util.Log().Debug("客户端取消压缩请求")
zipWriter.Close()
file.Close()
_ = os.Remove(path)
}
func (fs *FileSystem) doCompress(ctx context.Context, file *model.File, folder *model.Folder, zipWriter *zip.Writer, isArchive bool) {
// 如果对象是文件
if file != nil {
// 切换上传策略
fs.Policy = file.GetPolicy()
err := fs.DispatchHandler()
if err != nil {
util.Log().Warning("无法压缩文件%s%s", file.Name, err)
return
}
// 获取文件内容
fileToZip, err := fs.Handler.Get(
context.WithValue(ctx, fsctx.FileModelCtx, *file),
file.SourceName,
)
if err != nil {
util.Log().Debug("Open%s%s", file.Name, err)
return
}
if closer, ok := fileToZip.(io.Closer); ok {
defer closer.Close()
}
// 创建压缩文件头
header := &zip.FileHeader{
Name: filepath.Join(file.Position, file.Name),
Modified: file.UpdatedAt,
UncompressedSize64: file.Size,
}
// 指定是压缩还是归档
if isArchive {
header.Method = zip.Store
} else {
header.Method = zip.Deflate
}
writer, err := zipWriter.CreateHeader(header)
if err != nil {
return
}
_, err = io.Copy(writer, fileToZip)
} else if folder != nil {
// 对象是目录
// 获取子文件
subFiles, err := folder.GetChildFiles()
if err == nil && len(subFiles) > 0 {
for i := 0; i < len(subFiles); i++ {
fs.doCompress(ctx, &subFiles[i], nil, zipWriter, isArchive)
}
}
// 获取子目录,继续递归遍历
subFolders, err := folder.GetChildFolder()
if err == nil && len(subFolders) > 0 {
for i := 0; i < len(subFolders); i++ {
fs.doCompress(ctx, nil, &subFolders[i], zipWriter, isArchive)
}
}
}
}