modify

HttpServer/Events/OnMessage.php

@@ -53,6 +53,9 @@ class OnMessage extends Callback
             $event->trigger($name, [$frame, $server]);
         } catch (\Throwable $exception) {
             $this->addError($exception, 'websocket');
+            if (!swoole()->exist($frame->fd)) {
+                return;
+            }
             $server->send($frame->fd, $exception->getMessage());
         }
     }

HttpServer/Events/OnReceive.php

@@ -60,12 +60,18 @@ class OnReceive extends Callback
             if (empty($dispatch)) {
                 $dispatch = Json::encode(['state' => 0, 'message' => 'ok']);
             }
+            if ($server->exist($fd)) {
                 return $server->send($fd, $dispatch);
+            }
+            return $dispatch;
         } catch (\Throwable $exception) {
             $this->addError($exception, 'receive');
             $error = ['state' => 500, 'message' => $exception->getMessage()];
+            if ($server->exist($fd)) {
                 return $server->send($fd, Json::encode($error));
             }
+            return Json::encode($error);
+        }
     }