fix: 优化网页端不能连接的问题

WebRTCControllerWeb/server/index.js

@@ -7,7 +7,12 @@ import { WebSocketServer } from 'ws';
 const PORT = Number(process.env.PORT || 8088);
 const PATH = process.env.WS_PATH || '/ws/signal';
 
-const wss = new WebSocketServer({ port: PORT, path: PATH });
+const wss = new WebSocketServer({
+  port: PORT,
+  path: PATH,
+  // WebRTC SDP 消息可能较大，将最大负载设为 1MB（默认 100MB 但在某些代理环境下受限）
+  maxPayload: 1024 * 1024,
+});
 
 // deviceId -> { ws, type }
 const sessions = new Map();
@@ -17,10 +22,34 @@ const pending = new Map();
 const keyOf = (a, b) => `${a}->${b}`;
 
 function send(ws, obj) {
-  if (ws && ws.readyState === ws.OPEN) ws.send(JSON.stringify(obj));
+  if (ws && ws.readyState === ws.OPEN) {
+    try {
+      ws.send(JSON.stringify(obj));
+    } catch (e) {
+      console.error('[send] 发送消息失败:', e.message);
+    }
+  }
 }
 
+// —— 服务端主动 ping/pong 保活：每 30 秒向所有连接发送 ping，
+//    若 60 秒内未收到 pong 则强制关闭连接（防止僵死连接占用资源）。
+const HEARTBEAT_INTERVAL = 30_000;
+const heartbeatTimer = setInterval(() => {
+  wss.clients.forEach((ws) => {
+    if (ws._alive === false) {
+      console.warn('[heartbeat] 连接无响应，强制关闭');
+      return ws.terminate();
+    }
+    ws._alive = false;
+    try { ws.ping(); } catch { /* ignore */ }
+  });
+}, HEARTBEAT_INTERVAL);
+wss.on('close', () => clearInterval(heartbeatTimer));
+
 wss.on('connection', (ws) => {
+  ws._alive = true;
+  ws.on('pong', () => { ws._alive = true; });
+
   ws.on('message', (data) => {
     let msg;
     try {
@@ -29,6 +58,8 @@ wss.on('connection', (ws) => {
       return;
     }
     const type = (msg.type || '').toUpperCase();
+    // 忽略客户端心跳 ping，仅用于保活
+    if (type === 'PING') return;
     switch (type) {
       case 'REGISTER': handleRegister(ws, msg); break;
       case 'DEVICE_LIST': handleDeviceList(ws); break;