refactor: ddns (#414)

* refactor ddns

* update webhook

cmd/dashboard/controller/controller.go

@@ -1,7 +1,6 @@
 package controller
 
 import (
-	"encoding/json"
 	"fmt"
 	"html/template"
 	"io/fs"
@@ -277,7 +276,7 @@ func natGateway(c *gin.Context) {
 	rpc.NezhaHandlerSingleton.CreateStream(streamId)
 	defer rpc.NezhaHandlerSingleton.CloseStream(streamId)
 
-	taskData, err := json.Marshal(model.TaskNAT{
+	taskData, err := utils.Json.Marshal(model.TaskNAT{
 		StreamID: streamId,
 		Host:     natConfig.Host,
 	})

cmd/dashboard/controller/oauth2.go

@@ -2,7 +2,6 @@ package controller
 
 import (
 	"context"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"net/http"
@@ -199,7 +198,7 @@ func (oa *oauth2controller) callback(c *gin.Context) {
 			if err == nil {
 				defer resp.Body.Close()
 				var cloudflareUserInfo *cloudflare.UserInfo
-				if err := json.NewDecoder(resp.Body).Decode(&cloudflareUserInfo); err == nil {
+				if err := utils.Json.NewDecoder(resp.Body).Decode(&cloudflareUserInfo); err == nil {
 					user = cloudflareUserInfo.MapToNezhaUser()
 				}
 			}