310 lines
8.9 KiB
JavaScript
310 lines
8.9 KiB
JavaScript
/**
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* WebSocket管理
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* 管理WebSocket连接，处理WebSocket事件
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*/
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class WebSocketManager {
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constructor(url = null) {
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this.url = url || this.getDefaultWebSocketUrl();
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this.socket = null;
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this.isConnected = false;
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this.listeners = new Map();
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this.reconnectAttempts = 0;
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this.maxReconnectAttempts = 5;
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this.reconnectDelay = 1000;
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this.connectionId = null;
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this.heartbeatInterval = null;
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}
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/**
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* 获取默认WebSocket URL
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* @returns {string} WebSocket URL
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*/
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getDefaultWebSocketUrl() {
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const protocol = location.protocol === 'https:' ? 'wss:' : 'ws:';
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return `${protocol}//${location.host}`;
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}
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/**
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* 连接WebSocket
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*/
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connect() {
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try {
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this.socket = new WebSocket(this.url);
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this.socket.onopen = () => {
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console.log('WebSocket connected');
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this.isConnected = true;
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this.reconnectAttempts = 0;
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// 生成连接ID
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this.connectionId = this.generateConnectionId();
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// 发送连接消息
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this.sendConnectMessage();
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// 启动心跳
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this.startHeartbeat();
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this.emit('connect');
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};
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this.socket.onclose = () => {
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console.log('WebSocket disconnected');
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this.isConnected = false;
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this.stopHeartbeat();
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this.emit('disconnect');
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this.attemptReconnect();
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};
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this.socket.onmessage = (event) => {
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try {
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const message = JSON.parse(event.data);
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this.handleMessage(message);
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} catch (error) {
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console.error('Error parsing WebSocket message:', error);
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}
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};
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this.socket.onerror = (error) => {
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console.error('WebSocket error:', error);
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this.emit('error', error);
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};
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} catch (error) {
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console.error('Error connecting to WebSocket:', error);
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this.emit('error', error);
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}
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}
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/**
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* 断开WebSocket连接
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*/
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disconnect() {
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if (this.socket) {
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this.socket.close();
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this.socket = null;
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this.isConnected = false;
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}
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}
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/**
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* 发送消息
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* @param {string} type - 消息类型
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* @param {Object} data - 消息数据
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*/
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send(type, data) {
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if (this.isConnected && this.socket) {
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try {
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let message;
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// 根据消息类型构建不同的消息格式
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if (type === 'connect' || type === 'disconnect') {
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message = JSON.stringify({ type, connectionId: this.connectionId });
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} else if (type === 'offer' || type === 'answer' || type === 'candidate') {
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message = JSON.stringify({ type, data });
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} else if (type === 'broadcast') {
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message = JSON.stringify({ type, message: data.message, targetConnectionId: data.targetConnectionId });
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} else if (type === 'ping' || type === 'pong') {
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message = JSON.stringify({ type });
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} else {
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// 兼容旧格式，用于自定义事件
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message = JSON.stringify({ event: type, data });
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}
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this.socket.send(message);
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} catch (error) {
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console.error('Error sending WebSocket message:', error);
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}
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} else {
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console.warn('WebSocket not connected, cannot send message');
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}
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}
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/**
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* 处理接收到的消息
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* @param {Object} message - 消息对象
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*/
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handleMessage(message) {
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if (message.type) {
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switch (message.type) {
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case 'user-joined':
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this.emit('user-joined', message.data);
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break;
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case 'user-left':
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this.emit('user-left', message.data);
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break;
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case 'media-state-changed':
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this.emit('media-state-changed', message.data);
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break;
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case 'message-received':
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this.emit('message-received', message.data);
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break;
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case 'network-quality':
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this.emit('network-quality', message.data);
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break;
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case 'call-ended':
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this.emit('call-ended', message.data);
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break;
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case 'call-request':
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this.emit('call-request', message.data);
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break;
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case 'ping':
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// 处理心跳请求，回复pong
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this.send('pong');
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break;
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case 'pong':
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// 处理心跳响应
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this.emit('pong');
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break;
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case 'offer':
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this.emit('offer', message.data);
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break;
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case 'answer':
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this.emit('answer', message.data);
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break;
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case 'candidate':
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this.emit('candidate', message.data);
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break;
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default:
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// 处理旧格式消息
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if (message.event) {
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this.emit(message.event, message.data);
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} else {
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this.emit('message', message);
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}
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break;
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}
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} else if (message.event) {
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// 处理旧格式消息
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this.emit(message.event, message.data);
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} else {
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this.emit('message', message);
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}
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}
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/**
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* 尝试重连
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*/
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attemptReconnect() {
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if (this.reconnectAttempts < this.maxReconnectAttempts) {
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this.reconnectAttempts++;
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const delay = this.reconnectDelay * Math.pow(2, this.reconnectAttempts - 1);
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console.log(`Attempting to reconnect in ${delay}ms...`);
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setTimeout(() => {
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console.log(`Reconnect attempt ${this.reconnectAttempts}/${this.maxReconnectAttempts}`);
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this.connect();
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}, delay);
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} else {
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console.error('Max reconnect attempts reached');
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this.emit('reconnect-failed');
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}
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}
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/**
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* 生成连接ID
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* @returns {string} 连接ID
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*/
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generateConnectionId() {
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return 'conn_' + Math.random().toString(36).substring(2, 15) + Math.random().toString(36).substring(2, 15);
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}
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/**
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* 发送连接消息
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*/
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sendConnectMessage() {
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this.send('connect');
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}
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/**
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* 发送断开连接消息
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*/
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sendDisconnectMessage() {
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this.send('disconnect');
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}
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/**
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* 启动心跳
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*/
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startHeartbeat() {
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this.heartbeatInterval = setInterval(() => {
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if (this.isConnected) {
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this.send('ping');
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}
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}, 30000); // 每30秒发送一次心跳
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}
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/**
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* 停止心跳
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*/
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stopHeartbeat() {
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if (this.heartbeatInterval) {
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clearInterval(this.heartbeatInterval);
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this.heartbeatInterval = null;
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}
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}
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/**
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* 获取连接ID
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* @returns {string} 连接ID
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*/
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getConnectionId() {
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return this.connectionId;
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}
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/**
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* 订阅事件
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* @param {string} event - 事件名称
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* @param {Function} callback - 回调函数
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*/
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on(event, callback) {
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if (!this.listeners.has(event)) {
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this.listeners.set(event, []);
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}
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this.listeners.get(event).push(callback);
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}
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/**
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* 取消订阅事件
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* @param {string} event - 事件名称
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* @param {Function} callback - 回调函数
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*/
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off(event, callback) {
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if (this.listeners.has(event)) {
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const callbacks = this.listeners.get(event);
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this.listeners.set(event, callbacks.filter(cb => cb !== callback));
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}
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}
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/**
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* 触发事件
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* @param {string} event - 事件名称
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* @param {*} data - 事件数据
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*/
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emit(event, data) {
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if (this.listeners.has(event)) {
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this.listeners.get(event).forEach(callback => {
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try {
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callback(data);
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} catch (error) {
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console.error(`Error in event listener for ${event}:`, error);
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}
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});
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}
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}
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/**
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* 检查连接状态
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* @returns {boolean} 是否连接
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*/
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getIsConnected() {
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return this.isConnected;
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}
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}
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// 创建单例实例
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const wsManager = new WebSocketManager();
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export default wsManager;
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