feat: 支持下载备份

internal/route/backup.go

@@ -20,6 +20,8 @@ func BackupRoutes(i do.Injector) (Endpoints, error) {
 		{Method: http.MethodPost, Path: "/api/backup/{type}", Handler: backup.Create, Summary: "创建备份", Tags: []string{"备份"},
 			Request: request.BackupCreate{}},
 		{Method: http.MethodPost, Path: "/api/backup/{type}/upload", Handler: backup.Upload, Summary: "上传备份", Tags: []string{"备份"}},
+		{Method: http.MethodGet, Path: "/api/backup/{type}/download", Handler: backup.Download, Summary: "下载备份", Tags: []string{"备份"},
+			Request: request.BackupFile{}},
 		{Method: http.MethodDelete, Path: "/api/backup/{type}/delete", Handler: backup.Delete, Summary: "删除备份", Tags: []string{"备份"},
 			Request: request.BackupFile{}},
 		{Method: http.MethodPost, Path: "/api/backup/{type}/restore", Handler: backup.Restore, Summary: "恢复备份", Tags: []string{"备份"},

internal/service/backup.go

@@ -152,6 +152,29 @@ func (s *BackupService) Delete(w http.ResponseWriter, r *http.Request) {
 	Success(w, nil)
 }
 
+func (s *BackupService) Download(w http.ResponseWriter, r *http.Request) {
+	req, err := Bind[request.BackupFile](r)
+	if err != nil {
+		Error(w, http.StatusUnprocessableEntity, "%v", err)
+		return
+	}
+
+	file := filepath.Join(s.backupRepo.GetDefaultPath(biz.BackupType(req.Type)), req.File)
+	info, err := os.Stat(file)
+	if err != nil {
+		Error(w, http.StatusNotFound, "%v", err)
+		return
+	}
+	if info.IsDir() {
+		Error(w, http.StatusForbidden, s.t.Get("can't download a directory"))
+		return
+	}
+
+	render := chix.NewRender(w, r)
+	defer render.Release()
+	render.Download(file, info.Name())
+}
+
 func (s *BackupService) Restore(w http.ResponseWriter, r *http.Request) {
 	req, err := Bind[request.BackupRestore](r)
 	if err != nil {

web/src/views/backup/ListView.vue

@@ -65,10 +65,24 @@ const columns: any = [
   {
     title: $gettext('Actions'),
     key: 'actions',
-    width: 260,
+    width: 320,
     hideInExcel: true,
     render(row: any) {
       return h(NFlex, { size: 'small', align: 'center' }, () => [
+        h(
+          NButton,
+          {
+            size: 'small',
+            type: 'primary',
+            secondary: true,
+            onClick: () => {
+              window.open(
+                `/api/backup/${type.value}/download?file=${encodeURIComponent(row.name)}`,
+              )
+            },
+          },
+          { default: () => $gettext('Download') },
+        ),
         h(
           NButton,
           {