feat: seprate os and docker default download dir

db/db.go

@@ -62,7 +62,17 @@ func (c *client) init() {
 	downloadDir := c.GetSetting(SettingDownloadDir)
 	if downloadDir == "" {
 		log.Infof("set default download dir")
-		c.SetSetting(SettingDownloadDir, "/downloads")
+		if utils.IsRunningInDocker() {
+			c.SetSetting(SettingDownloadDir, "/downloads")
+		} else {
+			downloadDir, err := utils.UserDownloadDir()
+			if err != nil {
+				log.Errorf("get user download dir error: %v", err)
+				downloadDir = "/downloads"
+			}
+			c.SetSetting(SettingDownloadDir, downloadDir)
+		}
+		
 	}
 	logLevel := c.GetSetting(SettingLogLevel)
 	if logLevel == "" {

pkg/utils/utils.go

@@ -314,3 +314,35 @@ func DirSize(path string) (int64, error) {
 	})
 	return size, err
 }
+
+func IsRunningInDocker() bool {
+	if _, err := os.Stat("/.dockerenv"); err == nil {
+		return true
+	}
+	return false
+}
+
+func UserDownloadDir() (string, error) {
+	var downloadDirNames []string = []string{"Downloads", "downloads", "download", "下载"}
+
+	if IsRunningInDocker() {
+		return "/downloads", nil
+	}
+
+	homeDir, err := os.UserHomeDir()
+	if err != nil {
+		return "", err
+	}
+
+	for _, ddn := range downloadDirNames {
+		var dir = filepath.Join(homeDir, ddn)
+
+		if _, err := os.Stat(dir); os.IsNotExist(err) {
+			continue
+		} else {
+			return dir, nil
+		}
+	}
+
+	return "", errors.New("no download dir found")
+}