feat(archive): support multipart archives (#8184 close #8015)

* feat(archive): multipart support & sevenzip tool

* feat(archive): rardecode tool

* feat(archive): support decompress multi-selected

* fix(archive): decompress response filter internal

* feat(archive): support multipart zip

* fix: more applicable AcceptedMultipartExtensions interface

internal/archive/sevenzip/sevenzip.go

@@ -0,0 +1,72 @@
+package sevenzip
+
+import (
+	"io"
+	"strings"
+
+	"github.com/alist-org/alist/v3/internal/archive/tool"
+	"github.com/alist-org/alist/v3/internal/errs"
+	"github.com/alist-org/alist/v3/internal/model"
+	"github.com/alist-org/alist/v3/internal/stream"
+)
+
+type SevenZip struct{}
+
+func (SevenZip) AcceptedExtensions() []string {
+	return []string{".7z"}
+}
+
+func (SevenZip) AcceptedMultipartExtensions() map[string]tool.MultipartExtension {
+	return map[string]tool.MultipartExtension{
+		".7z.001": {".7z.%.3d", 2},
+	}
+}
+
+func (SevenZip) GetMeta(ss []*stream.SeekableStream, args model.ArchiveArgs) (model.ArchiveMeta, error) {
+	reader, err := getReader(ss, args.Password)
+	if err != nil {
+		return nil, err
+	}
+	_, tree := tool.GenerateMetaTreeFromFolderTraversal(&WrapReader{Reader: reader})
+	return &model.ArchiveMetaInfo{
+		Comment:   "",
+		Encrypted: args.Password != "",
+		Tree:      tree,
+	}, nil
+}
+
+func (SevenZip) List(ss []*stream.SeekableStream, args model.ArchiveInnerArgs) ([]model.Obj, error) {
+	return nil, errs.NotSupport
+}
+
+func (SevenZip) Extract(ss []*stream.SeekableStream, args model.ArchiveInnerArgs) (io.ReadCloser, int64, error) {
+	reader, err := getReader(ss, args.Password)
+	if err != nil {
+		return nil, 0, err
+	}
+	innerPath := strings.TrimPrefix(args.InnerPath, "/")
+	for _, file := range reader.File {
+		if file.Name == innerPath {
+			r, e := file.Open()
+			if e != nil {
+				return nil, 0, e
+			}
+			return r, file.FileInfo().Size(), nil
+		}
+	}
+	return nil, 0, errs.ObjectNotFound
+}
+
+func (SevenZip) Decompress(ss []*stream.SeekableStream, outputPath string, args model.ArchiveInnerArgs, up model.UpdateProgress) error {
+	reader, err := getReader(ss, args.Password)
+	if err != nil {
+		return err
+	}
+	return tool.DecompressFromFolderTraversal(&WrapReader{Reader: reader}, outputPath, args, up)
+}
+
+var _ tool.Tool = (*SevenZip)(nil)
+
+func init() {
+	tool.RegisterTool(SevenZip{})
+}

internal/archive/sevenzip/utils.go

@@ -0,0 +1,61 @@
+package sevenzip
+
+import (
+	"errors"
+	"github.com/alist-org/alist/v3/internal/archive/tool"
+	"github.com/alist-org/alist/v3/internal/errs"
+	"github.com/alist-org/alist/v3/internal/stream"
+	"github.com/bodgit/sevenzip"
+	"io"
+	"io/fs"
+)
+
+type WrapReader struct {
+	Reader *sevenzip.Reader
+}
+
+func (r *WrapReader) Files() []tool.SubFile {
+	ret := make([]tool.SubFile, 0, len(r.Reader.File))
+	for _, f := range r.Reader.File {
+		ret = append(ret, &WrapFile{f: f})
+	}
+	return ret
+}
+
+type WrapFile struct {
+	f *sevenzip.File
+}
+
+func (f *WrapFile) Name() string {
+	return f.f.Name
+}
+
+func (f *WrapFile) FileInfo() fs.FileInfo {
+	return f.f.FileInfo()
+}
+
+func (f *WrapFile) Open() (io.ReadCloser, error) {
+	return f.f.Open()
+}
+
+func getReader(ss []*stream.SeekableStream, password string) (*sevenzip.Reader, error) {
+	readerAt, err := stream.NewMultiReaderAt(ss)
+	if err != nil {
+		return nil, err
+	}
+	sr, err := sevenzip.NewReaderWithPassword(readerAt, readerAt.Size(), password)
+	if err != nil {
+		return nil, filterPassword(err)
+	}
+	return sr, nil
+}
+
+func filterPassword(err error) error {
+	if err != nil {
+		var e *sevenzip.ReadError
+		if errors.As(err, &e) && e.Encrypted {
+			return errs.WrongArchivePassword
+		}
+	}
+	return err
+}