添加pong处理

src/services/ws/handler.ts

@@ -12,6 +12,7 @@ class WSMessageHandler {
     this.handlers = new Map([
       ['test', this.handleTest],
       ['ping', this.handlePing],
+      ['pong', this.handlePong],
     ]);
   }
 
@@ -46,6 +47,10 @@ class WSMessageHandler {
     await wsTools.send(socket, { type: 'pong' });
   }
 
+  private async handlePong(socket: WebSocket, msg: any) {
+    logger.debug(`received pong ${msg.data}`);
+  }
+
   private async handleUnknown(socket: WebSocket, msg: any) {
     logger.warn(`收到未知消息类型: ${msg.type}`);
     await wsTools.send(socket, {