fix: fix the CallbackBeforeSendSingleMsg

internal/rpc/msg/callback.go

@@ -81,6 +81,9 @@ func callbackBeforeSendSingleMsg(ctx context.Context, msg *pbchat.SendMsgReq) er
 	if err := http.CallBackPostReturn(ctx, cbURL(), req, resp, config.Config.Callback.CallbackBeforeSendSingleMsg); err != nil {
 		return err
 	}
+	if len(resp.Content) != 0 {
+		msg.MsgData.Content = resp.Content
+	}
 	return nil
 }
 

pkg/callbackstruct/message.go

@@ -25,6 +25,7 @@ type CallbackBeforeSendSingleMsgReq struct {
 
 type CallbackBeforeSendSingleMsgResp struct {
 	CommonCallbackResp
+	Content []byte `json:"content"`
 }
 
 type CallbackAfterSendSingleMsgReq struct {