fix:修复DNS缓存导致的网络检查不正确的问题

Util/checker.go

@@ -1,18 +1,36 @@
 package Util
 
 import (
+	"Mmx/Request"
+	"fmt"
 	"net"
+	"time"
 )
 
 type checker struct{}
 
 var Checker checker
 
-func (checker) NetOk() bool {
-	if ip, err := net.LookupIP("www.msftconnecttest.com"); err != nil {
+func (checker) NetOk(url string) bool {
+	if ip, err := net.LookupIP("www.msftconnecttest.com"); err != nil { //通过DNS确认是否在线
 		return false
 	} else if len(ip) == 0 || ip[0].String() != "13.107.4.52" {
 		return false
 	}
+
+	{ //有些路由器有DNS缓存，故进行进一步确认
+		body, err := Request.Get(url, map[string]string{
+			"callback": "jQuery1635413",
+			"_":        fmt.Sprint(time.Now().UnixNano()),
+		})
+		ErrHandler(err)
+		r, err := GetResult(body)
+		if err != nil {
+			ErrHandler(err)
+		}
+		if r != "ok" {
+			return false
+		}
+	}
 	return true
 }