add read-only db work mode

src/main/main.go

@@ -18,6 +18,7 @@ type args struct {
 	Port string `arg:"-p" help:"web server port"`
 	Path string `arg:"-d" help:"database path"`
 	Add  string `arg:"-a" help:"add torrent link and exit"`
+	RDB  bool   `arg:"-r" help:"start in read-only DB mode"`
 	Kill bool   `arg:"-k" help:"dont kill program on signal"`
 }
 
@@ -45,7 +46,11 @@ func main() {
 	Preconfig(params.Kill)
 
 	server.Start(params.Path, params.Port)
+	if (params.RDB) {
+	    settings.SetRDB()
+	} else {
 	    settings.SaveSettings()
+	}
 	fmt.Println(server.WaitServer())
 	time.Sleep(time.Second * 3)
 	os.Exit(0)

src/server/settings/DB.go

@@ -22,9 +22,10 @@ func openDB() error {
 	}
 
 	var err error
-	db, err = bolt.Open(filepath.Join(Path, "torrserver.db"), 0666, nil)
+	var ro = Get().ReadOnlyMode
+	db, err = bolt.Open(filepath.Join(Path, "torrserver.db"), 0666, &bolt.Options{ReadOnly: ro})
 	if err != nil {
-		fmt.Print(err)
+		fmt.Println(err)
 		return err
 	}
 

src/server/settings/Settings.go

@@ -37,6 +37,7 @@ type Settings struct {
 	DisableUPNP        bool
 	DisableDHT         bool
 	DisableUpload      bool
+	ReadOnlyMode       bool
 	Encryption         int // 0 - Enable, 1 - disable, 2 - force
 	DownloadRateLimit  int // in kb, 0 - inf
 	UploadRateLimit    int // in kb, 0 - inf
@@ -113,3 +114,10 @@ func SaveSettings() error {
 		return setsDB.Put([]byte("json"), []byte(buf))
 	})
 }
+
+func SetRDB() {
+	SaveSettings()
+	fmt.Println("Enable Read-only DB mode")
+	CloseDB()
+	sets.ReadOnlyMode = true
+}

src/server/web/Torrent.go

@@ -182,7 +182,7 @@ func torrentGet(c echo.Context) error {
 	tor, err := settings.LoadTorrentDB(jreq.Hash)
 	if err != nil {
 		fmt.Println("Error get torrent:", jreq.Hash, err)
-		return echo.NewHTTPError(http.StatusBadRequest, err.Error())
+		// return echo.NewHTTPError(http.StatusBadRequest, err.Error()) // Handle R/O DB
 	}
 
 	torrStatus := torr.TorrentAdded