download single db-files as snapshot too

web/filebrowser_download.go

@@ -16,13 +16,50 @@ import (
 	"strings"
 )
 
+func ignoreFileDownload(filename string) bool {
+	if strings.HasSuffix(filename, ".sqlite-shm") || strings.HasSuffix(filename, ".sqlite-wal") {
+		// sqlite wal and shared memory
+		return true
+	}
+	return false
+}
+
+func isSqliteDatabase(filename string) bool {
+	return strings.HasSuffix(filename, ".sqlite")
+}
+
+func createSqliteSnapshot(filename string) (string, error) {
+	f, err := os.CreateTemp(os.TempDir(), "backup.sqlite")
+	if err != nil {
+		return "", fmt.Errorf("create temp error: %v", err)
+	}
+
+	err = db.BackupSqlite3Database(context.Background(), filename, f.Name())
+	if err != nil {
+		return "", fmt.Errorf("backup error from '%s' to '%s': %v", filename, f.Name(), err)
+	}
+
+	return f.Name(), nil
+}
+
 func (a *Api) DownloadFile(w http.ResponseWriter, r *http.Request, claims *types.Claims) {
 	rel_filename, filename, err := a.get_sanitized_filename(r, "filename")
 	if err != nil {
 		SendError(w, 500, err.Error())
 		return
 	}
 
+	maintenance := a.app.MaintenanceMode.Load()
+	if isSqliteDatabase(filename) && !maintenance {
+		tmppath, err := createSqliteSnapshot(filename)
+		if err != nil {
+			SendError(w, 500, fmt.Sprintf("error creating snapshot of '%s': %v", filename, err))
+			return
+		}
+		defer os.Remove(tmppath)
+		filename = tmppath
+	}
+
 	f, err := os.Open(filename)
 	if err != nil {
 		SendError(w, 500, err.Error())
@@ -40,7 +77,7 @@ func (a *Api) DownloadFile(w http.ResponseWriter, r *http.Request, claims *types
 	w.Header().Set("Content-Type", contentType)
 
 	if r.URL.Query().Get("download") == "true" {
-		w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", path.Base(filename)))
+		w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", path.Base(rel_filename)))
 	}
 
 	_, err = w.Write(header[:header_size])
@@ -62,32 +99,6 @@ func (a *Api) DownloadFile(w http.ResponseWriter, r *http.Request, claims *types
 	}, r)
 }
 
-func ignoreFileDownload(filename string) bool {
-	if strings.HasSuffix(filename, ".sqlite-shm") || strings.HasSuffix(filename, ".sqlite-wal") {
-		// sqlite wal and shared memory
-		return true
-	}
-	return false
-}
-
-func isSqliteDatabase(filename string) bool {
-	return strings.HasSuffix(filename, ".sqlite")
-}
-
-func createSqliteSnapshot(filename string) (string, error) {
-	f, err := os.CreateTemp(os.TempDir(), "backup.sqlite")
-	if err != nil {
-		return "", fmt.Errorf("create temp error: %v", err)
-	}
-
-	err = db.BackupSqlite3Database(context.Background(), filename, f.Name())
-	if err != nil {
-		return "", fmt.Errorf("backup error from '%s' to '%s': %v", filename, f.Name(), err)
-	}
-
-	return f.Name(), nil
-}
-
 func (a *Api) DownloadZip(w http.ResponseWriter, r *http.Request, claims *types.Claims) {
 	maintenance := a.app.MaintenanceMode.Load()