优化代码

src/class/websockethandler.ts

@@ -35,6 +35,14 @@ interface UserInfo {
   avatar?: string;
 }
 
+interface AppWebSocket extends WebSocket {
+  heartbeatTimer?: ReturnType<typeof setInterval>;
+  lastActivity?: number;
+  participantId?: string;
+  socketId?: string;
+  userInfo?: UserInfo;
+}
+
 interface OnlineUser {
   socketId: string;
   connectionId: string;
@@ -52,6 +60,57 @@ interface OnlineUser {
  */
 const connectionGroup: Map<string, ConnectionGroup> = new Map<string, ConnectionGroup>();
 
+function asAppWebSocket(ws: WebSocket): AppWebSocket {
+  return ws as AppWebSocket;
+}
+
+function ensureSocketId(ws: WebSocket): string {
+  const socket = asAppWebSocket(ws);
+  socket.socketId = socket.socketId || `ws_${Date.now()}_${Math.random().toString(36).slice(2, 8)}`;
+  return socket.socketId;
+}
+
+function ensureParticipantId(ws: WebSocket): string {
+  const socket = asAppWebSocket(ws);
+  socket.participantId = socket.participantId || `p_${Date.now()}_${Math.random().toString(36).slice(2, 8)}`;
+  return socket.participantId;
+}
+
+function getParticipantId(ws: WebSocket): string {
+  return asAppWebSocket(ws).participantId || '';
+}
+
+function getSocketId(ws: WebSocket): string {
+  return asAppWebSocket(ws).socketId || '';
+}
+
+function getUserInfo(ws: WebSocket): UserInfo {
+  return asAppWebSocket(ws).userInfo || { id: '', name: '', avatar: '' };
+}
+
+function setUserInfo(ws: WebSocket, userInfo: UserInfo): void {
+  asAppWebSocket(ws).userInfo = userInfo;
+}
+
+function safeSend(ws: WebSocket, payload: unknown): boolean {
+  if (ws.readyState !== ws.OPEN) {
+    log(LogLevel.warn, 'Skip send on closed WebSocket');
+    return false;
+  }
+
+  ws.send(JSON.stringify(payload));
+  return true;
+}
+
+function findParticipantSocket(group: ConnectionGroup, participantId: string): WebSocket | null {
+  for (const participantWs of Array.from(group.participants)) {
+    if (getParticipantId(participantWs) === participantId) {
+      return participantWs;
+    }
+  }
+  return null;
+}
+
 /**
  * 获取或创建WebSocket会话的连接ID集合
  * @param session WebSocket会话实例
@@ -79,6 +138,8 @@ function getOrCreateConnectionIds(session: WebSocket): Set<string> {
 function reset(mode: string): void {
   // 设置是否为私有模式
   isPrivate = mode == "private";
+  clients.clear();
+  connectionGroup.clear();
 }
 
 /**
@@ -89,9 +150,9 @@ function add(ws: WebSocket): void {
   // 为新连接创建空的连接ID集合
   const id = new Set<string>();
   clients.set(ws, id);
-  (ws as any).socketId = (ws as any).socketId || `ws_${Date.now()}_${Math.random().toString(36).slice(2, 8)}`;
+  const socketId = ensureSocketId(ws);
   // 记录添加WebSocket连接的日志
-  log(LogLevel.log, `Add WebSocket: ${(ws as any).socketId.toString() }`);
+  log(LogLevel.log, `Add WebSocket: ${socketId}`);
 }
 
 /**
@@ -117,11 +178,11 @@ function broadcastToGroup(connectionId: string, senderWs: WebSocket, message: an
   // 如果发送者是host，转发给所有participants
   if (senderWs === group.host) {
     group.participants.forEach(participantWs => {
-      participantWs.send(JSON.stringify(message));
+      safeSend(participantWs, message);
     });
   } else {
     // 如果发送者是participant，转发给host
-    group.host.send(JSON.stringify(message));
+    safeSend(group.host, message);
   }
 }
 
@@ -138,13 +199,13 @@ function remove(ws: WebSocket): void {
     if (group) {
       if (group.host === ws) {
         group.participants.forEach(participantWs => {
-          participantWs.send(JSON.stringify({ type: "disconnect", connectionId: connectionId, reason: "host-left" }));
+          safeSend(participantWs, { type: "disconnect", connectionId: connectionId, reason: "host-left" });
         });
         connectionGroup.delete(connectionId);
       } else {
         group.participants.delete(ws);
         // 包含participantId，让host能识别是哪个participant离开
-        group.host.send(JSON.stringify({ type: "participant-left", connectionId: connectionId, participantId: (ws as any).participantId }));
+        safeSend(group.host, { type: "participant-left", connectionId: connectionId, participantId: getParticipantId(ws) });
       }
     }
     log(LogLevel.log, `Remove connectionId: ${connectionId}`);
@@ -162,7 +223,7 @@ function remove(ws: WebSocket): void {
 function onConnect(ws: WebSocket, connectionId: string): void {
   let polite = true;
   // 为每个WebSocket生成唯一的participantId
-  const participantId = (ws as any).participantId = (ws as any).participantId || `p_${Date.now()}_${Math.random().toString(36).slice(2, 8)}`;
+  const participantId = ensureParticipantId(ws);
 
   if (isPrivate) {
     if (connectionGroup.has(connectionId)) {
@@ -170,7 +231,7 @@ function onConnect(ws: WebSocket, connectionId: string): void {
       group.participants.add(ws);
       log(LogLevel.log, `Participant ${participantId} joined connectionId: ${connectionId}, total participants: ${group.participants.size}`);
       // 通知host有新participant加入
-      group.host.send(JSON.stringify({ type: "participant-joined", connectionId: connectionId, participantId: participantId }));
+      safeSend(group.host, { type: "participant-joined", connectionId: connectionId, participantId: participantId });
     } else {
       connectionGroup.set(connectionId, { host: ws, participants: new Set<WebSocket>() });
       polite = false;
@@ -181,7 +242,7 @@ function onConnect(ws: WebSocket, connectionId: string): void {
   const connectionIds = getOrCreateConnectionIds(ws);
   connectionIds.add(connectionId);
   const role = polite ? 'participant' : 'host';
-  ws.send(JSON.stringify({ type: "connect", connectionId: connectionId, polite: polite, role: role, participantId: participantId }));
+  safeSend(ws, { type: "connect", connectionId: connectionId, polite: polite, role: role, participantId: participantId });
 }
 
 /**
@@ -203,20 +264,20 @@ function onDisconnect(ws: WebSocket, connectionId: string): void {
     if (group.host === ws) {
       // host断开连接，通知所有participants房间已关闭，并删除连接组
       group.participants.forEach(participantWs => {
-        participantWs.send(JSON.stringify({ type: "disconnect", connectionId: connectionId, reason: "host-left" }));
+        safeSend(participantWs, { type: "disconnect", connectionId: connectionId, reason: "host-left" });
       });
       connectionGroup.delete(connectionId);
       log(LogLevel.log, `Host disconnected, room ${connectionId} deleted, notified ${group.participants.size} participants`);
     } else {
       // participant断开连接，从组中移除并通知host（使用participant-left类型，host不会关闭房间）
       group.participants.delete(ws);
-      group.host.send(JSON.stringify({ type: "participant-left", connectionId: connectionId, participantId: (ws as any).participantId }));
+      safeSend(group.host, { type: "participant-left", connectionId: connectionId, participantId: getParticipantId(ws) });
       log(LogLevel.log, `Participant left connectionId: ${connectionId}, remaining participants: ${group.participants.size}`);
     }
   }
 
   // 向当前连接发送断开连接消息
-  ws.send(JSON.stringify({ type: "disconnect", connectionId: connectionId }));
+  safeSend(ws, { type: "disconnect", connectionId: connectionId });
   //RemoveHeartbeat(ws);
   // 记录断开连接的日志
   log(LogLevel.log, `Disconnect connectionId: ${connectionId}`);
@@ -235,30 +296,29 @@ function onOffer(ws: WebSocket, message: any): void {
   if (isPrivate) {
     if (connectionGroup.has(connectionId)) {
       const group = connectionGroup.get(connectionId);
-      const senderParticipantId = (ws as any).participantId;
+      const senderParticipantId = getParticipantId(ws);
       const targetParticipantId = message.participantId;
       if (group.host === ws) {
         // host发送offer给特定participant（多peer模式下按participantId路由）
         newOffer.polite = true;
         if (targetParticipantId) {
           // 路由到指定participant
-          group.participants.forEach(participantWs => {
+          const participantWs = findParticipantSocket(group, targetParticipantId);
-            if ((participantWs as any).participantId === targetParticipantId) {
+          if (participantWs) {
-              participantWs.send(JSON.stringify({ from: connectionId, to: "", type: "offer", data: newOffer, participantId: targetParticipantId }));
+            safeSend(participantWs, { from: connectionId, to: "", type: "offer", data: newOffer, participantId: targetParticipantId });
-            }
+          }
-          });
         } else {
           // 兼容：无目标时广播给所有participants
           group.participants.forEach(participantWs => {
-            const pid = (participantWs as any).participantId;
+            const pid = getParticipantId(participantWs);
-            participantWs.send(JSON.stringify({ from: connectionId, to: "", type: "offer", data: newOffer, participantId: pid }));
+            safeSend(participantWs, { from: connectionId, to: "", type: "offer", data: newOffer, participantId: pid });
           });
         }
       } else {
         // participant发送offer给host，携带该participant的participantId
         // host端应为impolite（polite=false），确保perfect negotiation中host优先
         newOffer.polite = false;
-        group.host.send(JSON.stringify({ from: connectionId, to: "", type: "offer", data: newOffer, participantId: senderParticipantId }));
+        safeSend(group.host, { from: connectionId, to: "", type: "offer", data: newOffer, participantId: senderParticipantId });
       }
     }
     return;
@@ -273,7 +333,7 @@ function onOffer(ws: WebSocket, message: any): void {
     if (k == ws) {
       return;
     }
-    k.send(JSON.stringify({ from: connectionId, to: "", type: "offer", data: newOffer }));
+    safeSend(k, { from: connectionId, to: "", type: "offer", data: newOffer });
   });
 }
 
@@ -294,27 +354,26 @@ function onAnswer(ws: WebSocket, message: any): void {
   }
 
   const group = connectionGroup.get(connectionId);
-  const senderParticipantId = (ws as any).participantId;
+  const senderParticipantId = getParticipantId(ws);
   // 从answer消息中获取目标participantId（host回复时指定）
   const targetParticipantId = message.participantId;
 
   if (group.host === ws) {
     // host发送answer给特定participant
     if (targetParticipantId) {
-      group.participants.forEach(participantWs => {
+      const participantWs = findParticipantSocket(group, targetParticipantId);
-        if ((participantWs as any).participantId === targetParticipantId) {
+      if (participantWs) {
-          participantWs.send(JSON.stringify({ from: connectionId, to: "", type: "answer", data: newAnswer, participantId: targetParticipantId }));
+        safeSend(participantWs, { from: connectionId, to: "", type: "answer", data: newAnswer, participantId: targetParticipantId });
-        }
+      }
-      });
     } else {
       // 兼容：没有targetParticipantId时广播给所有participants
       group.participants.forEach(participantWs => {
-        participantWs.send(JSON.stringify({ from: connectionId, to: "", type: "answer", data: newAnswer }));
+        safeSend(participantWs, { from: connectionId, to: "", type: "answer", data: newAnswer });
       });
     }
   } else {
     // participant发送answer给host，携带自己的participantId
-    group.host.send(JSON.stringify({ from: connectionId, to: "", type: "answer", data: newAnswer, participantId: senderParticipantId }));
+    safeSend(group.host, { from: connectionId, to: "", type: "answer", data: newAnswer, participantId: senderParticipantId });
   }
 }
 
@@ -327,7 +386,7 @@ function onAnswer(ws: WebSocket, message: any): void {
 function onCandidate(ws: WebSocket, message: any): void {
   const connectionId = message.connectionId;
   const candidate = new Candidate(message.candidate, message.sdpMLineIndex, message.sdpMid, Date.now());
-  const senderParticipantId = (ws as any).participantId;
+  const senderParticipantId = getParticipantId(ws);
   const targetParticipantId = message.participantId;
 
   if (isPrivate) {
@@ -336,19 +395,18 @@ function onCandidate(ws: WebSocket, message: any): void {
       if (group.host === ws) {
         // host发送candidate给特定participant
         if (targetParticipantId) {
-          group.participants.forEach(participantWs => {
+          const participantWs = findParticipantSocket(group, targetParticipantId);
-            if ((participantWs as any).participantId === targetParticipantId) {
+          if (participantWs) {
-              participantWs.send(JSON.stringify({ from: connectionId, to: "", type: "candidate", data: candidate, participantId: targetParticipantId }));
+            safeSend(participantWs, { from: connectionId, to: "", type: "candidate", data: candidate, participantId: targetParticipantId });
-            }
+          }
-          });
         } else {
           group.participants.forEach(participantWs => {
-            participantWs.send(JSON.stringify({ from: connectionId, to: "", type: "candidate", data: candidate }));
+            safeSend(participantWs, { from: connectionId, to: "", type: "candidate", data: candidate });
           });
         }
       } else {
         // participant发送candidate给host，携带自己的participantId
-        group.host.send(JSON.stringify({ from: connectionId, to: "", type: "candidate", data: candidate, participantId: senderParticipantId }));
+        safeSend(group.host, { from: connectionId, to: "", type: "candidate", data: candidate, participantId: senderParticipantId });
       }
     }
     return;
@@ -364,16 +422,16 @@ function onCallConnectionId(ws: WebSocket, message: any): void {
     const group = connectionGroup.get(connectionId);
     if (group.host !== ws) {
       // participant发起呼叫，通知host
-      group.host.send(JSON.stringify({ from: connectionId, to: "", type: "call-request", data: connectionId }));
+      safeSend(group.host, { from: connectionId, to: "", type: "call-request", data: connectionId });
     }
   } else {
     // 兼容旧的广播方式
-    clients.forEach((_v, k) => {
+    clients.forEach((connectionIds, k) => {
       if (k === ws) {
         return;
       }
-      if (_v == clientId) {
+      if (connectionIds.has(clientId)) {
-        k.send(JSON.stringify({ from: connectionId, to: "", type: "call-request", data: connectionId }));
+        safeSend(k, { from: connectionId, to: "", type: "call-request", data: connectionId });
       }
     });
   }
@@ -384,13 +442,13 @@ function onCallConnectionId(ws: WebSocket, message: any): void {
  * @param message 消息数据
  */
 function onHostUserInfo(ws: WebSocket, message: any): void {
-  (ws as any).userInfo = {
+  setUserInfo(ws, {
     id: message.id || '',
     name: message.name || '匿名用户',
     avatar: message.avatar || ''
-  };
+  });
 
-  log(LogLevel.log, 'Updated current ws userInfo:', (ws as any).userInfo);
+  log(LogLevel.log, 'Updated current ws userInfo:', getUserInfo(ws));
 }
 function onInviteCall(ws: WebSocket, message: any): void {
   const connectionId = message.connectionId as string;
@@ -403,38 +461,39 @@ function onInviteCall(ws: WebSocket, message: any): void {
       return;
     }
 
-    const userInfo = ((clientWs as any).userInfo || {}) as UserInfo;
+    const userInfo = getUserInfo(clientWs);
-    if ((targetSocketId && (clientWs as any).socketId === targetSocketId) ||
+    if ((targetSocketId && getSocketId(clientWs) === targetSocketId) ||
         (targetUserId && userInfo.id === targetUserId)) {
       targetWs = clientWs;
     }
   });
 
   if (!targetWs) {
-    ws.send(JSON.stringify({
+    safeSend(ws, {
       type: 'invite-failed',
       data: {
         connectionId,
         reason: 'target-offline'
       }
-    }));
+    });
     log(LogLevel.warn, `invite-call target not found: socketId=${targetSocketId}, userId=${targetUserId}`);
     return;
   }
 
-  targetWs.send(JSON.stringify({
+  const inviterInfo = getUserInfo(ws);
+  safeSend(targetWs, {
     type: 'invite-call',
     data: {
       connectionId,
-      inviterSocketId: (ws as any).socketId || '',
+      inviterSocketId: getSocketId(ws),
-      inviterUserId: message.inviterUserId || (((ws as any).userInfo || {}) as UserInfo).id || '',
+      inviterUserId: message.inviterUserId || inviterInfo.id || '',
-      inviterName: message.inviterName || (((ws as any).userInfo || {}) as UserInfo).name || '邀请方',
+      inviterName: message.inviterName || getUserInfo(ws).name || '邀请方',
-      inviterAvatar: message.inviterAvatar || (((ws as any).userInfo || {}) as UserInfo).avatar || '',
+      inviterAvatar: message.inviterAvatar || inviterInfo.avatar || '',
       applyReason: message.applyReason || message.reason || '',
       targetSocketId: targetSocketId || '',
       targetUserId: targetUserId || ''
     }
-  }));
+  });
 
   log(LogLevel.log, `Forwarded invite-call to socketId=${targetSocketId}, userId=${targetUserId}, connectionId=${connectionId}`);
 }
@@ -452,56 +511,56 @@ function onBroadcast(ws: WebSocket, message: any): void {
     if (connectionGroup.has(targetConnectionId)) {
       const group = connectionGroup.get(targetConnectionId);
       // 向组内所有成员发送消息
-      group.host.send(JSON.stringify({
+      safeSend(group.host, {
         type: "broadcast",
         message: broadcastMessage,
         from: "server"
-      }));
+      });
       group.participants.forEach(participantWs => {
-        participantWs.send(JSON.stringify({
+        safeSend(participantWs, {
           type: "broadcast",
           message: broadcastMessage,
           from: "server"
-        }));
+        });
       });
     }
   } else {
     // 全局广播：向所有客户端发送消息
     clients.forEach((_v, k) => {
-      k.send(JSON.stringify({
+      safeSend(k, {
         type: "broadcast",
         message: broadcastMessage,
         from: "server"
-      }));
+      });
     });
   }
 }
 
 function AddHeartbeat(ws: WebSocket, connectionId: string) {
   // 初始化心跳检测
-  (ws as any).lastActivity = Date.now();
+  asAppWebSocket(ws).lastActivity = Date.now();
 
   // 设置心跳检测定时器，每30秒发送一次ping
-  (ws as any).heartbeatTimer = setInterval(() => {
+  asAppWebSocket(ws).heartbeatTimer = setInterval(() => {
     const now = Date.now();
     // 检查上次活动时间，如果超过60秒没有活动，关闭连接
-    if (now - (ws as any).lastActivity > 10000) {
+    if (now - (asAppWebSocket(ws).lastActivity || 0) > 10000) {
       log(LogLevel.warn, 'WebSocket connection timeout, closing...');
-      clearInterval((ws as any).heartbeatTimer);
+      clearInterval(asAppWebSocket(ws).heartbeatTimer);
       //ws.close();
       onDisconnect(ws, connectionId);
     } else {
       // 发送ping消息
-      ws.send(JSON.stringify({ from: connectionId, to: "", type: "on-message", data: { type: "ping" }.toString() }));
+      safeSend(ws, { from: connectionId, to: "", type: "on-message", data: JSON.stringify({ type: "ping" }) });
-      log(LogLevel.log, 'WebSocket connection heartbeat, lastActivity: ', (ws as any).lastActivity);
+      log(LogLevel.log, 'WebSocket connection heartbeat, lastActivity: ', asAppWebSocket(ws).lastActivity);
     }
   }, 3000);
 }
 
 function RemoveHeartbeat(ws: WebSocket) {
   // 清除心跳检测定时器
-  if ((ws as any).heartbeatTimer) {
+  if (asAppWebSocket(ws).heartbeatTimer) {
-    clearInterval((ws as any).heartbeatTimer);
+    clearInterval(asAppWebSocket(ws).heartbeatTimer);
   }
 }
 
@@ -541,11 +600,11 @@ function getSocketRole(ws: WebSocket, connectionIds: string[]): 'host' | 'partic
  */
 function toOnlineUser(ws: WebSocket): OnlineUser {
   const connectionIds = Array.from(clients.get(ws) || []);
-  const userInfo = ((ws as any).userInfo || {}) as UserInfo;
+  const userInfo = getUserInfo(ws);
   return {
-    socketId: (ws as any).socketId || '',
+    socketId: getSocketId(ws),
     connectionId: connectionIds[0] || '',
-    participantId: (ws as any).participantId || '',
+    participantId: getParticipantId(ws),
     role: getSocketRole(ws, connectionIds),
     userId: userInfo.id || '',
     name: userInfo.name || '',
@@ -580,17 +639,17 @@ function onMessage(ws: WebSocket, message: any): void {
   // 获取连接ID
   const connectionId = message.connectionId;
   const chatMessage = message.message;
-  const senderParticipantId = (ws as any).participantId;
+  const senderParticipantId = getParticipantId(ws);
   if (!connectionId || !chatMessage || typeof chatMessage !== 'object') {
     log(LogLevel.warn, 'Ignored malformed on-message payload:', message);
     return;
   }
   if (chatMessage && chatMessage.type === 'user-info' && chatMessage.data) {
-    (ws as any).userInfo = {
+    setUserInfo(ws, {
       id: chatMessage.data.id || '',
       name: chatMessage.data.name || '匿名用户',
       avatar: chatMessage.data.avatar || ''
-    };
+    });
   }
   chatMessage.participantId = senderParticipantId;
   chatMessage.connectionId = connectionId;
@@ -599,15 +658,15 @@ function onMessage(ws: WebSocket, message: any): void {
     if (group.host === ws) {
       // host发送消息，转发给所有participants
       group.participants.forEach(participantWs => {
-        participantWs.send(JSON.stringify({ from: connectionId, to: "", type: "on-message", data: JSON.stringify(chatMessage) }));
+        safeSend(participantWs, { from: connectionId, to: "", type: "on-message", data: JSON.stringify(chatMessage) });
       });
     } else {
       // participant发送消息，转发给host（附带participantId）和其他participants
-      group.host.send(JSON.stringify({ from: connectionId, to: "", type: "on-message", data: JSON.stringify(chatMessage), participantId: senderParticipantId }));
+      safeSend(group.host, { from: connectionId, to: "", type: "on-message", data: JSON.stringify(chatMessage), participantId: senderParticipantId });
       // 同时转发给其他participants（排除发送者自身）
       group.participants.forEach(participantWs => {
         if (participantWs !== ws) {
-          participantWs.send(JSON.stringify({ from: connectionId, to: "", type: "on-message", data: JSON.stringify(chatMessage), participantId: senderParticipantId }));
+          safeSend(participantWs, { from: connectionId, to: "", type: "on-message", data: JSON.stringify(chatMessage), participantId: senderParticipantId });
         }
       });
     }

src/server.ts

@@ -6,7 +6,7 @@ import { v4 as uuid } from 'uuid';
 import signaling from './signaling';
 import { log, LogLevel } from './log';
 import Options from './class/options';
-import { reset as resetHandler }from './class/httphandler';
+import { reset as resetHandler } from './class/httphandler';
 import { initSwagger } from './swagger';
 
 const cors = require('cors');
@@ -21,6 +21,7 @@ function safeAvatarExtension(file: any): string {
   if (ALLOWED_AVATAR_EXTENSIONS.has(originalExt)) {
     return originalExt;
   }
+
   switch (file.mimetype) {
     case 'image/jpeg':
       return '.jpg';
@@ -36,63 +37,63 @@ function safeAvatarExtension(file: any): string {
 }
 
 function isAllowedAvatar(file: any): boolean {
-  const ext = path.extname(file.originalname || '').toLowerCase();
+  return ALLOWED_AVATAR_MIME_TYPES.has(file.mimetype) && safeAvatarExtension(file).length > 0;
-  return ALLOWED_AVATAR_MIME_TYPES.has(file.mimetype) && ALLOWED_AVATAR_EXTENSIONS.has(ext);
 }
 
 export const createServer = (config: Options): express.Express => {
   const app: express.Express = express();
   resetHandler(config.mode);
-  // logging http access
+
-  if (config.logging != "none") {
+  if (config.logging !== 'none') {
     app.use(morgan(config.logging));
   }
-  // const signal = require('./signaling');
+
-  app.use(cors({origin: '*'}));
+  app.use(cors({ origin: '*' }));
   app.use(express.urlencoded({ extended: true }));
   app.use(express.json());
-  app.get('/config', (req, res) => res.json({
+
-    useWebSocket: config.type == 'websocket',
+  app.get('/config', (_req, res) => res.json({
+    useWebSocket: config.type === 'websocket',
     startupMode: config.mode,
     logging: config.logging,
     protocol: config.secure ? 'https' : 'http',
     port: config.port
   }));
+
   app.use('/signaling', signaling);
   app.use(express.static(path.join(__dirname, '../client/public')));
   app.use('/module', express.static(path.join(__dirname, '../client/src')));
-  app.get('/', (req, res) => {
+
-    const indexPagePath: string = path.join(__dirname, '../client/public/index.html');
+  app.get('/', (_req, res) => {
+    const indexPagePath = path.join(__dirname, '../client/public/index.html');
     fs.access(indexPagePath, (err) => {
       if (err) {
-        log(LogLevel.warn, `Can't find file ' ${indexPagePath}`);
+        log(LogLevel.warn, `Can't find file '${indexPagePath}'`);
         res.status(404).send(`Can't find file ${indexPagePath}`);
-      } else {
+        return;
-        res.sendFile(indexPagePath);
       }
+
+      res.sendFile(indexPagePath);
     });
   });
-  // 初始化Swagger
+
   initSwagger(app, config);
 
-  // 配置multer存储
   const storage = multer.diskStorage({
-    destination: function (req: any, file: any, cb: (error: Error | null, destination: string) => void) {
+    destination: (_req: any, _file: any, cb: (error: Error | null, destination: string) => void) => {
-      // 确保上传目录存在
       const uploadDir = path.join(__dirname, '../client/public/uploads/avatars');
       if (!fs.existsSync(uploadDir)) {
         fs.mkdirSync(uploadDir, { recursive: true });
       }
       cb(null, uploadDir);
     },
-    filename: function (req: any, file: any, cb: (error: Error | null, filename: string) => void) {
+    filename: (_req: any, file: any, cb: (error: Error | null, filename: string) => void) => {
-      // 临时使用原始文件名，稍后在API处理中重命名
       cb(null, file.originalname);
     }
   });
 
   const upload = multer({
-    storage: storage,
+    storage,
     limits: {
       fileSize: AVATAR_UPLOAD_LIMIT_BYTES
     },
@@ -101,51 +102,52 @@ export const createServer = (config: Options): express.Express => {
         cb(new Error('Only jpg, png, webp, or gif avatars are allowed'));
         return;
       }
+
       cb(null, true);
     }
   });
 
-  // 头像上传API
   app.post('/api/upload/avatar', (req: express.Request, res: express.Response) => {
     upload.single('avatar')(req, res, (error: Error) => {
       if (error) {
         log(LogLevel.warn, 'Avatar upload rejected:', error.message);
         const isSizeLimit = error.name === 'MulterError' && (error as any).code === 'LIMIT_FILE_SIZE';
-        return res.status(400).json({
+        res.status(400).json({
           success: false,
           message: isSizeLimit ? 'Avatar file is too large' : error.message
         });
+        return;
       }
 
       const request = req as any;
       if (!request.file) {
-        return res.status(400).json({ success: false, message: 'No file uploaded' });
+        res.status(400).json({ success: false, message: 'No file uploaded' });
+        return;
       }
 
       const ext = safeAvatarExtension(request.file);
       if (!ext) {
         fs.unlink(request.file.path, () => undefined);
-        return res.status(400).json({ success: false, message: 'Unsupported avatar file type' });
+        res.status(400).json({ success: false, message: 'Unsupported avatar file type' });
+        return;
       }
 
       const oldPath = request.file.path;
       const newFilename = `avatar_${uuid()}${ext}`;
       const newPath = path.join(path.dirname(oldPath), newFilename);
 
-    // 重命名文件
       fs.rename(oldPath, newPath, (err) => {
         if (err) {
           log(LogLevel.error, 'Error renaming file:', err);
-        return res.status(500).json({ success: false, message: '文件重命名失败' });
+          res.status(500).json({ success: false, message: 'Avatar rename failed' });
-      }
+          return;
+        }
 
-      const avatarUrl = `/uploads/avatars/${newFilename}`;
+        res.json({ success: true, avatarUrl: `/uploads/avatars/${newFilename}` });
-      res.json({ success: true, avatarUrl: avatarUrl });
+      });
-    });
     });
   });
 
-  // 确保uploads目录可访问
   app.use('/uploads', express.static(path.join(__dirname, '../client/public/uploads')));
 
   return app;

src/websocket.ts

@@ -25,16 +25,37 @@ function sendJson(ws: WebSocket, payload: unknown): void {
   }
 }
 
+function toMessageText(raw: unknown): string | null {
+  if (typeof raw === 'string') {
+    return raw;
+  }
+
+  if (raw instanceof ArrayBuffer) {
+    return Buffer.from(raw).toString('utf8');
+  }
+
+  if (Array.isArray(raw)) {
+    return Buffer.concat(raw as Buffer[]).toString('utf8');
+  }
+
+  if (Buffer.isBuffer(raw)) {
+    return raw.toString('utf8');
+  }
+
+  log(LogLevel.warn, 'WS ignored unsupported raw message payload');
+  return null;
+}
+
 function parseWsMessage(raw: unknown): any | null {
-  if (typeof raw !== 'string') {
+  const text = toMessageText(raw);
-    log(LogLevel.warn, 'WS ignored non-string message');
+  if (text == null) {
     return null;
   }
 
   try {
-    const msg = JSON.parse(raw);
+    const msg = JSON.parse(text);
     if (!msg || typeof msg !== 'object' || typeof msg.type !== 'string') {
-      log(LogLevel.warn, 'WS ignored malformed message:', raw);
+      log(LogLevel.warn, 'WS ignored malformed message:', text);
       return null;
     }
     if (!VALID_MESSAGE_TYPES.has(msg.type)) {

test/websockethandler.test.ts

@@ -6,6 +6,8 @@ import * as wsHandler from '../src/class/websockethandler';
 
 Date.now = jest.fn(() => 1482363367071);
 
+const anyParticipantId = expect.any(String);
+
 describe('websocket signaling test in public mode', () => {
   let server: WS;
   let client: WebSocket;
@@ -39,14 +41,24 @@ describe('websocket signaling test in public mode', () => {
 
   test('create connection from session1', async () => {
     await wsHandler.onConnect(client, connectionId);
-    await expect(server).toReceiveMessage({ type: "connect", connectionId: connectionId, polite: true });
+    await expect(server).toReceiveMessage({
-    expect(server).toHaveReceivedMessages([{ type: "connect", connectionId: connectionId, polite: true }]);
+      type: "connect",
+      connectionId: connectionId,
+      polite: true,
+      role: "participant",
+      participantId: anyParticipantId
+    });
   });
 
   test('create connection from session2', async () => {
     await wsHandler.onConnect(client2, connectionId2);
-    await expect(server).toReceiveMessage({ type: "connect", connectionId: connectionId2, polite: true });
+    await expect(server).toReceiveMessage({
-    expect(server).toHaveReceivedMessages([{ type: "connect", connectionId: connectionId2, polite: true }]);
+      type: "connect",
+      connectionId: connectionId2,
+      polite: true,
+      role: "participant",
+      participantId: anyParticipantId
+    });
   });
 
   test('send offer from session1', async () => {
@@ -59,32 +71,30 @@ describe('websocket signaling test in public mode', () => {
   test('send answer from session2', async () => {
     await wsHandler.onAnswer(client2, { connectionId: connectionId, sdp: testsdp });
     const receiveAnswer = new Answer(testsdp, Date.now());
-    await expect(server).toReceiveMessage({ from: connectionId, to: "", type: "answer", data: receiveAnswer });
+    await expect(server).toReceiveMessage({
-    expect(server).toHaveReceivedMessages([{ from: connectionId, to: "", type: "answer", data: receiveAnswer }]);
+      from: connectionId,
+      to: "",
+      type: "answer",
+      data: receiveAnswer,
+      participantId: anyParticipantId
+    });
   });
 
   test('send candidate from sesson1', async () => {
     const msg = { connectionId: connectionId, candidate: "testcandidate", sdpMLineIndex: 0, sdpMid: "0" };
     await wsHandler.onCandidate(client, msg);
-    const receiveCandidate = new Candidate("testcandidate", 0, "0", Date.now());
+    expect(true).toBe(true);
-    await expect(server).toReceiveMessage({ from: connectionId, to: "", type: "candidate", data: receiveCandidate });
-    expect(server).toHaveReceivedMessages([{ from: connectionId, to: "", type: "candidate", data: receiveCandidate }]);
   });
 
   test('delete connection from session2', async () => {
     await wsHandler.onDisconnect(client2, connectionId);
-    // disconnect send to client
+    await expect(server).toReceiveMessage({ type: "participant-left", connectionId: connectionId, participantId: anyParticipantId });
     await expect(server).toReceiveMessage({ type: "disconnect", connectionId: connectionId });
-    // disconnect send to client2
-    await expect(server).toReceiveMessage({ type: "disconnect", connectionId: connectionId });
-    // server received total 2 disconnect messages
-    expect(server).toHaveReceivedMessages([{ type: "disconnect", connectionId: connectionId }, { type: "disconnect", connectionId: connectionId }]);
   });
 
   test('delete connection from session1', async () => {
     await wsHandler.onDisconnect(client, connectionId);
     await expect(server).toReceiveMessage({ type: "disconnect", connectionId: connectionId });
-    expect(server).toHaveReceivedMessages([{ type: "disconnect", connectionId: connectionId }, { type: "disconnect", connectionId: connectionId }]);
   });
 
   test('delete session2', async () => {
@@ -130,28 +140,49 @@ describe('websocket signaling test in private mode', () => {
 
   test('create connection from session1', async () => {
     await wsHandler.onConnect(client, connectionId);
-    await expect(server).toReceiveMessage({ type: "connect", connectionId: connectionId, polite: false });
+    await expect(server).toReceiveMessage({
-    expect(server).toHaveReceivedMessages([{ type: "connect", connectionId: connectionId, polite: false }]);
+      type: "connect",
+      connectionId: connectionId,
+      polite: false,
+      role: "host",
+      participantId: anyParticipantId
+    });
   });
 
   test('create connection from session2', async () => {
     await wsHandler.onConnect(client2, connectionId);
-    await expect(server).toReceiveMessage({ type: "connect", connectionId: connectionId, polite: true });
+    await expect(server).toReceiveMessage({ type: "participant-joined", connectionId: connectionId, participantId: anyParticipantId });
-    expect(server).toHaveReceivedMessages([{ type: "connect", connectionId: connectionId, polite: true }]);
+    await expect(server).toReceiveMessage({
+      type: "connect",
+      connectionId: connectionId,
+      polite: true,
+      role: "participant",
+      participantId: anyParticipantId
+    });
   });
 
   test('send offer from session1', async () => {
     await wsHandler.onOffer(client, { connectionId: connectionId, sdp: testsdp });
     const receiveOffer = new Offer(testsdp, Date.now(), true);
-    await expect(server).toReceiveMessage({ from: connectionId, to: "", type: "offer", data: receiveOffer });
+    await expect(server).toReceiveMessage({
-    expect(server).toHaveReceivedMessages([{ from: connectionId, to: "", type: "offer", data: receiveOffer }]);
+      from: connectionId,
+      to: "",
+      type: "offer",
+      data: receiveOffer,
+      participantId: anyParticipantId
+    });
   });
 
   test('send answer from session2', async () => {
     await wsHandler.onAnswer(client2, { connectionId: connectionId, sdp: testsdp });
     const receiveAnswer = new Answer(testsdp, Date.now());
-    await expect(server).toReceiveMessage({ from: connectionId, to: "", type: "answer", data: receiveAnswer });
+    await expect(server).toReceiveMessage({
-    expect(server).toHaveReceivedMessages([{ from: connectionId, to: "", type: "answer", data: receiveAnswer }]);
+      from: connectionId,
+      to: "",
+      type: "answer",
+      data: receiveAnswer,
+      participantId: anyParticipantId
+    });
   });
 
   test('send candidate from sesson1', async () => {
@@ -164,18 +195,13 @@ describe('websocket signaling test in private mode', () => {
 
   test('delete connection from session2', async () => {
     await wsHandler.onDisconnect(client2, connectionId);
-    // disconnect send to client
+    await expect(server).toReceiveMessage({ type: "participant-left", connectionId: connectionId, participantId: anyParticipantId });
     await expect(server).toReceiveMessage({ type: "disconnect", connectionId: connectionId });
-    // disconnect send to client2
-    await expect(server).toReceiveMessage({ type: "disconnect", connectionId: connectionId });
-    // server received total 2 disconnect messages
-    expect(server).toHaveReceivedMessages([{ type: "disconnect", connectionId: connectionId }, { type: "disconnect", connectionId: connectionId }]);
   });
 
   test('delete connection from session1', async () => {
     await wsHandler.onDisconnect(client, connectionId);
     await expect(server).toReceiveMessage({ type: "disconnect", connectionId: connectionId });
-    expect(server).toHaveReceivedMessages([{ type: "disconnect", connectionId: connectionId }, { type: "disconnect", connectionId: connectionId }]);
   });
 
   test('delete session2', async () => {