Allow for rar Extraction

server/filesystem/compress.go

@@ -96,7 +96,7 @@ func (fs *Filesystem) archiverFileSystem(ctx context.Context, p string) (iofs.FS
 			// while ArchiveFS can't.
 			// zip.Reader doesn't suffer from issue #330 and #310 according to local test (but they should be fixed anyway)
 			return zip.NewReader(f, info.Size())
-		case archives.Archival:
+		case archives.Extraction:
 			return &archives.ArchiveFS{Stream: io.NewSectionReader(f, 0, info.Size()), Format: ff.(archives.Extractor), Context: ctx}, nil
 		case archives.Compression:
 			return archiverext.FileFS{File: f, Compression: ff}, nil