feat(webclient): add new query_online function

There may be a loss of performance
Therefore, it is not enabled by default

conf/config.yaml

@@ -28,6 +28,7 @@ rustdesk:
   key: ""
   key-file: "./conf/data/id_ed25519.pub"
   personal: 1
+  webclient-magic-queryonline: 0
 logger:
   path: "./runtime/log.txt"
   level: "warn" #trace,debug,info,warn,error,fatal

config/rustdesk.go

@@ -11,6 +11,8 @@ type Rustdesk struct {
 	Key         string `mapstructure:"key"`
 	KeyFile     string `mapstructure:"key-file"`
 	Personal    int    `mapstructure:"personal"`
+	//webclient-magic-queryonline
+	WebclientMagicQueryonline int `mapstructure:"webclient-magic-queryonline"`
 }
 
 func LoadKeyFile(rustdesk *Rustdesk) {

http/controller/web/index.go

@@ -3,6 +3,7 @@ package web
 import (
 	"Gwen/global"
 	"github.com/gin-gonic/gin"
+	"strconv"
 )
 
 type Index struct {
@@ -14,11 +15,13 @@ func (i *Index) Index(c *gin.Context) {
 
 func (i *Index) ConfigJs(c *gin.Context) {
 	apiServer := global.Config.Rustdesk.ApiServer
-
+	magicQueryonline := strconv.Itoa(global.Config.Rustdesk.WebclientMagicQueryonline)
 	tmp := `
 localStorage.setItem('api-server', "` + apiServer + `")
 const ws2_prefix = 'wc-'
 localStorage.setItem(ws2_prefix+'api-server', "` + apiServer + `")
-`
+
+window.webclient_magic_queryonline = ` + magicQueryonline + ``
+
 	c.String(200, tmp)
 }