Add log levels (#332)

README.md

@@ -60,6 +60,7 @@ Note:
 | `WGUI_PERSISTENT_KEEPALIVE` | The default persistent keepalive for WireGuard in global settings                                                                                            | `15`                               |
 | `WGUI_FORWARD_MARK`         | The default WireGuard forward mark                                                                                                                           | `0xca6c`                           |
 | `WGUI_CONFIG_FILE_PATH`     | The default WireGuard config file path used in global settings                                                                                               | `/etc/wireguard/wg0.conf`          |
+| `WGUI_LOG_LEVEL`            | The default log level. Possible values: `DEBUG`, `INFO`, `WARN`, `ERROR`, `OFF`                                                                              | `INFO`                             |                            |
 | `WG_CONF_TEMPLATE`          | The custom `wg.conf` config file template. Please refer to our [default template](https://github.com/ngoduykhanh/wireguard-ui/blob/master/templates/wg.conf) | N/A                                |
 | `EMAIL_FROM_ADDRESS`        | The sender email address                                                                                                                                     | N/A                                |
 | `EMAIL_FROM_NAME`           | The sender name                                                                                                                                              | `WireGuard UI`                     |

main.go

@@ -88,6 +88,8 @@ func init() {
 	util.WgConfTemplate = flagWgConfTemplate
 	util.BasePath = util.ParseBasePath(flagBasePath)
 
+	// print only if log level is INFO or lower
+	if lvl, _ := util.ParseLogLevel(util.LookupEnvOrString(util.LogLevel, "INFO")); lvl <= log.INFO {
 		// print app information
 		fmt.Println("Wireguard UI")
 		fmt.Println("App Version\t:", appVersion)
@@ -103,6 +105,7 @@ func init() {
 		//fmt.Println("Session secret\t:", util.SessionSecret)
 		fmt.Println("Custom wg.conf\t:", util.WgConfTemplate)
 		fmt.Println("Base path\t:", util.BasePath+"/")
+	}
 }
 
 func main() {

router/router.go

@@ -118,10 +118,28 @@ func New(tmplBox *rice.Box, extraData map[string]string, secret []byte) *echo.Ec
 	templates["wake_on_lan_hosts.html"] = template.Must(template.New("wake_on_lan_hosts").Funcs(funcs).Parse(tmplBaseString + tmplWakeOnLanHostsString))
 	templates["about.html"] = template.Must(template.New("about").Funcs(funcs).Parse(tmplBaseString + aboutPageString))
 
-	e.Logger.SetLevel(log.DEBUG)
+	lvl, err := util.ParseLogLevel(util.LookupEnvOrString(util.LogLevel, "INFO"))
+	if err != nil {
+		log.Fatal(err)
+	}
+	logConfig := middleware.DefaultLoggerConfig
+	logConfig.Skipper = func(c echo.Context) bool {
+		resp := c.Response()
+		if resp.Status >= 500 && lvl > log.ERROR { // do not log if response is 5XX but log level is higher than ERROR
+			return true
+		} else if resp.Status >= 400 && lvl > log.WARN { // do not log if response is 4XX but log level is higher than WARN
+			return true
+		} else if lvl > log.DEBUG { // do not log if log level is higher than DEBUG
+			return true
+		}
+		return false
+	}
+
+	e.Logger.SetLevel(lvl)
 	e.Pre(middleware.RemoveTrailingSlash())
-	e.Use(middleware.Logger())
+	e.Use(middleware.LoggerWithConfig(logConfig))
 	e.HideBanner = true
+	e.HidePort = lvl > log.INFO // hide the port output if the log level is higher than INFO
 	e.Validator = NewValidator()
 	e.Renderer = &TemplateRegistry{
 		templates: templates,

util/config.go

@@ -42,6 +42,7 @@ const (
 	PersistentKeepaliveEnvVar              = "WGUI_PERSISTENT_KEEPALIVE"
 	ForwardMarkEnvVar                      = "WGUI_FORWARD_MARK"
 	ConfigFilePathEnvVar                   = "WGUI_CONFIG_FILE_PATH"
+	LogLevel                               = "WGUI_LOG_LEVEL"
 	ServerAddressesEnvVar                  = "WGUI_SERVER_INTERFACE_ADDRESSES"
 	ServerListenPortEnvVar                 = "WGUI_SERVER_LISTEN_PORT"
 	ServerPostUpScriptEnvVar               = "WGUI_SERVER_POST_UP_SCRIPT"

util/util.go

@@ -469,6 +469,22 @@ func LookupEnvOrStrings(key string, defaultVal []string) []string {
 	return defaultVal
 }
 
+func ParseLogLevel(lvl string) (log.Lvl, error) {
+	switch strings.ToLower(lvl) {
+	case "debug":
+		return log.DEBUG, nil
+	case "info":
+		return log.INFO, nil
+	case "warn":
+		return log.WARN, nil
+	case "error":
+		return log.ERROR, nil
+	case "off":
+		return log.OFF, nil
+	default:
+		return log.DEBUG, fmt.Errorf("not a valid log level: %s", lvl)
+	}
+
 // GetCurrentHash returns current hashes
 func GetCurrentHash(db store.IStore) (string, string) {
 	hashClients, _ := dirhash.HashDir(path.Join(db.GetPath(), "clients"), "prefix", dirhash.Hash1)