Merge branch 'v2.3.0release' of https://github.com/OpenIMSDK/Open-IM-Server into v2.3.0release

internal/msg_gateway/gate/ws_server.go

@@ -388,7 +388,10 @@ func (ws *WServer) delUserConn(conn *UserConn) {
 	if err != nil {
 		log.Error(operationID, " close err", "", "uid", uid, "platform", platform)
 	}
-	callbackResp := callbackUserOffline(operationID, conn.userID, platform, conn.connID)
+	if conn.PlatformID == 0 || conn.connID == "" {
+		log.NewWarn(operationID, utils.GetSelfFuncName(), "PlatformID or connID is null", conn.PlatformID, conn.connID)
+	}
+	callbackResp := callbackUserOffline(operationID, conn.userID, int(conn.PlatformID), conn.connID)
 	if callbackResp.ErrCode != 0 {
 		log.NewError(operationID, utils.GetSelfFuncName(), "callbackUserOffline failed", callbackResp)
 	}