feat: 后端: 在建立 SSH 连接时应用代理配置
This commit is contained in:
@@ -6,6 +6,8 @@ import { WriteStream } from 'fs'; // 需要 WriteStream 类型 (虽然 ssh2 的
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import { getDb } from './database'; // 引入数据库实例
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import { decrypt } from './utils/crypto'; // 引入解密函数
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import path from 'path'; // 需要 path
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import { HttpsProxyAgent } from 'https-proxy-agent'; // 引入 HTTP 代理支持
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import { SocksClient } from 'socks'; // 引入 SOCKS 代理支持
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// 扩展 WebSocket 类型以包含会话和 SSH/SFTP 连接信息
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interface AuthenticatedWebSocket extends WebSocket {
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@@ -25,21 +27,32 @@ export const activeSshConnections = new Map<AuthenticatedWebSocket, { client: Cl
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// 注意:WriteStream 类型来自 'fs',但 ssh2 的流行为类似
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const activeUploads = new Map<string, WriteStream>();
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// 数据库连接信息接口 (包含所有可能的凭证字段)
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// 数据库连接信息接口 (包含所有可能的凭证字段和 proxy_id)
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interface DbConnectionInfo {
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id: number;
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name: string;
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host: string;
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port: number;
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username: string;
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auth_method: 'password' | 'key'; // 支持密码或密钥
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auth_method: 'password' | 'key';
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encrypted_password?: string | null;
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encrypted_private_key?: string | null;
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encrypted_passphrase?: string | null;
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// proxy_id: number | null; // 待添加代理支持
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proxy_id?: number | null; // 关联的代理 ID
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// 其他字段...
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}
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// 新增:数据库代理信息接口
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interface DbProxyInfo {
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id: number;
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name: string;
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type: 'SOCKS5' | 'HTTP';
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host: string;
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port: number;
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username?: string | null;
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encrypted_password?: string | null;
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}
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/**
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* 清理指定 WebSocket 连接关联的 SSH 资源
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@@ -63,7 +76,7 @@ const cleanupSshConnection = (ws: AuthenticatedWebSocket) => {
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};
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// --- 状态获取相关 ---
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const STATUS_POLL_INTERVAL = 5000; // 每 5 秒获取一次状态
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const STATUS_POLL_INTERVAL = 1000; // 每 5 秒获取一次状态
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// Helper function to execute a command and return its stdout
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const executeSshCommand = (client: Client, command: string): Promise<string> => {
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@@ -494,15 +507,14 @@ export const initializeWebSocket = (server: http.Server, sessionParser: RequestH
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console.log(`WebSocket: 用户 ${ws.username} 请求连接到 ID: ${connectionId}`);
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ws.send(JSON.stringify({ type: 'ssh:status', payload: '正在获取连接信息...' }));
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// 1. 从数据库获取连接信息 (包括所有凭证字段)
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// 1. 从数据库获取连接信息 (包括 proxy_id)
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const connInfo = await new Promise<DbConnectionInfo | null>((resolve, reject) => {
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// 注意:如果多用户,需要验证 connectionId 是否属于当前 userId
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db.get(
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`SELECT id, name, host, port, username, auth_method,
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`SELECT id, name, host, port, username, auth_method, proxy_id,
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encrypted_password, encrypted_private_key, encrypted_passphrase
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FROM connections WHERE id = ?`,
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FROM connections WHERE id = ?`, // 添加 proxy_id
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[connectionId],
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(err, row: DbConnectionInfo) => {
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(err, row: DbConnectionInfo) => { // 类型已更新
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if (err) {
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console.error(`查询连接 ${connectionId} 详细信息时出错:`, err);
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return reject(new Error('查询连接信息失败'));
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@@ -523,9 +535,35 @@ export const initializeWebSocket = (server: http.Server, sessionParser: RequestH
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// return;
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}
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// 2. 获取代理信息 (如果 connInfo.proxy_id 存在)
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let proxyInfo: DbProxyInfo | null = null;
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if (connInfo.proxy_id) {
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ws.send(JSON.stringify({ type: 'ssh:status', payload: `正在获取代理 ${connInfo.proxy_id} 信息...` }));
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try {
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proxyInfo = await new Promise<DbProxyInfo | null>((resolve, reject) => {
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db.get(
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`SELECT id, name, type, host, port, username, encrypted_password FROM proxies WHERE id = ?`,
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[connInfo.proxy_id],
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(err, row: DbProxyInfo) => {
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if (err) return reject(new Error(`查询代理 ${connInfo.proxy_id} 失败: ${err.message}`));
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resolve(row ?? null);
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}
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);
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});
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if (!proxyInfo) {
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throw new Error(`未找到 ID 为 ${connInfo.proxy_id} 的代理配置。`);
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}
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console.log(`使用代理: ${proxyInfo.name} (${proxyInfo.type})`);
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} catch (proxyError: any) {
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console.error(`获取代理信息失败:`, proxyError);
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ws.send(JSON.stringify({ type: 'ssh:error', payload: `获取代理信息失败: ${proxyError.message}` }));
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return; // 获取代理失败则停止连接
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}
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}
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ws.send(JSON.stringify({ type: 'ssh:status', payload: `正在连接到 ${connInfo.host}...` }));
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// 2. 解密凭证并构建连接配置
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// 3. 解密凭证并构建连接配置
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let connectConfig: any = {
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host: connInfo.host,
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port: connInfo.port,
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@@ -558,97 +596,87 @@ export const initializeWebSocket = (server: http.Server, sessionParser: RequestH
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return;
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}
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// 3. 建立 SSH 连接
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const sshClient = new Client();
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ws.sshClient = sshClient; // 关联 client
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// 4. 处理代理配置(如果存在)并建立连接
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const sshClient = new Client(); // 创建 SSH Client 实例
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sshClient.on('ready', () => {
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console.log(`SSH: 用户 ${ws.username} 到 ${connInfo.host} 连接成功!`);
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ws.send(JSON.stringify({ type: 'ssh:status', payload: 'SSH 连接成功,正在打开 Shell...' }));
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// 4. 请求 Shell 通道
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sshClient.shell((err, stream) => {
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if (err) {
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console.error(`SSH: 用户 ${ws.username} 打开 Shell 失败:`, err);
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ws.send(JSON.stringify({ type: 'ssh:error', payload: `打开 Shell 失败: ${err.message}` }));
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cleanupSshConnection(ws);
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return;
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if (proxyInfo) {
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console.log(`WebSocket: 检测到连接 ${connInfo.id} 使用代理 ${proxyInfo.id} (${proxyInfo.type})`);
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ws.send(JSON.stringify({ type: 'ssh:status', payload: `正在应用代理 ${proxyInfo.name}...` }));
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try {
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let proxyPassword = '';
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if (proxyInfo.encrypted_password) {
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proxyPassword = decrypt(proxyInfo.encrypted_password);
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}
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ws.sshShellStream = stream; // 关联 stream
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// 存储活动连接 (此时 sftp 可能还未就绪)
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activeSshConnections.set(ws, { client: sshClient, shell: stream });
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console.log(`SSH: 用户 ${ws.username} Shell 通道已打开。`);
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// 尝试初始化 SFTP 会话
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sshClient.sftp((sftpErr, sftp) => {
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if (sftpErr) {
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console.error(`SFTP: 用户 ${ws.username} 初始化失败:`, sftpErr);
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// 即使 SFTP 失败,也保持 Shell 连接,但发送错误通知
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ws.send(JSON.stringify({ type: 'sftp:error', payload: `SFTP 初始化失败: ${sftpErr.message}` }));
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// 不再发送 ssh:connected,因为 SFTP 也是核心功能的一部分
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// ws.send(JSON.stringify({ type: 'ssh:connected' }));
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// 可以在这里发送一个包含错误的状态
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ws.send(JSON.stringify({ type: 'ssh:status', payload: 'Shell 已连接,但 SFTP 初始化失败。' }));
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return;
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if (proxyInfo.type === 'SOCKS5') {
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const socksOptions = {
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proxy: {
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host: proxyInfo.host,
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port: proxyInfo.port,
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type: 5 as 5, // SOCKS 版本 5
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userId: proxyInfo.username || undefined,
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password: proxyPassword || undefined,
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},
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command: 'connect' as 'connect',
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destination: {
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host: connInfo.host,
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port: connInfo.port,
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},
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timeout: connectConfig.readyTimeout ?? 20000, // 使用连接超时时间
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};
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console.log(`WebSocket: 正在通过 SOCKS5 代理 ${proxyInfo.host}:${proxyInfo.port} 连接到目标 ${connInfo.host}:${connInfo.port}...`);
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ws.send(JSON.stringify({ type: 'ssh:status', payload: `正在通过 SOCKS5 代理 ${proxyInfo.name} 连接...` }));
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SocksClient.createConnection(socksOptions)
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.then(({ socket }) => {
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console.log(`WebSocket: SOCKS5 代理连接成功。正在建立 SSH 连接...`);
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ws.send(JSON.stringify({ type: 'ssh:status', payload: 'SOCKS5 代理连接成功,正在建立 SSH...' }));
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connectConfig.sock = socket; // 使用建立的 SOCKS socket
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connectSshClient(ws, sshClient, connectConfig, connInfo); // 通过代理连接 SSH
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})
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.catch(socksError => {
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console.error(`WebSocket: SOCKS5 代理连接失败:`, socksError);
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ws.send(JSON.stringify({ type: 'ssh:error', payload: `SOCKS5 代理连接失败: ${socksError.message}` }));
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cleanupSshConnection(ws);
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});
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// 注意:对于 SOCKS5,连接逻辑在 .then 回调中处理
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} else if (proxyInfo.type === 'HTTP') {
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let proxyUrl = `http://`;
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if (proxyInfo.username) {
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proxyUrl += `${proxyInfo.username}`;
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if (proxyPassword) {
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proxyUrl += `:${proxyPassword}`;
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}
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proxyUrl += '@';
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}
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console.log(`SFTP: 用户 ${ws.username} 会话已初始化。`);
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// 将 SFTP 实例存入 Map
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const existingConn = activeSshConnections.get(ws);
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if (existingConn) {
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existingConn.sftp = sftp;
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// SFTP 就绪后,才真正通知前端连接完成
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ws.send(JSON.stringify({ type: 'ssh:connected' }));
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// 启动状态轮询
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startStatusPolling(ws, sshClient);
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} else {
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// This case should ideally not happen if the connection was set earlier
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console.error(`SFTP: 无法找到用户 ${ws.username} 的活动连接记录以存储 SFTP 或启动轮询。`);
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ws.send(JSON.stringify({ type: 'ssh:error', payload: '内部服务器错误:无法关联 SFTP 会话。' }));
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cleanupSshConnection(ws);
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}
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});
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// 5. 数据转发:Shell -> WebSocket (发送 Base64 编码的数据)
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stream.on('data', (data: Buffer) => {
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// console.log('SSH Output Buffer Length:', data.length); // Debug log
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ws.send(JSON.stringify({
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type: 'ssh:output',
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payload: data.toString('base64'), // 将 Buffer 转为 Base64 字符串
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encoding: 'base64' // 明确告知前端编码方式
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}));
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});
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// 6. 处理 Shell 关闭
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stream.on('close', () => {
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console.log(`SSH: 用户 ${ws.username} Shell 通道已关闭。`);
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ws.send(JSON.stringify({ type: 'ssh:disconnected', payload: 'Shell 通道已关闭。' }));
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cleanupSshConnection(ws); // 清理资源
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});
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// Stderr 也使用 Base64 发送
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stream.stderr.on('data', (data: Buffer) => {
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console.error(`SSH Stderr (${ws.username}): ${data.toString('utf8').substring(0,100)}...`); // 日志中尝试 utf8 解码预览
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ws.send(JSON.stringify({
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type: 'ssh:output', // 同样使用 ssh:output 类型
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payload: data.toString('base64'),
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encoding: 'base64'
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}));
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});
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});
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}).on('error', (err) => {
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console.error(`SSH: 用户 ${ws.username} 连接错误:`, err);
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ws.send(JSON.stringify({ type: 'ssh:error', payload: `SSH 连接错误: ${err.message}` }));
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cleanupSshConnection(ws);
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}).on('close', () => {
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console.log(`SSH: 用户 ${ws.username} 连接已关闭。`);
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// 确保即使 shell 没关闭,也要通知前端并清理
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if (activeSshConnections.has(ws)) {
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ws.send(JSON.stringify({ type: 'ssh:disconnected', payload: 'SSH 连接已关闭。' }));
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proxyUrl += `${proxyInfo.host}:${proxyInfo.port}`;
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console.log(`WebSocket: 为连接 ${connInfo.id} 配置 HTTP 代理: ${proxyUrl.replace(/:[^:]*@/, ':***@')}`);
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connectConfig.agent = new HttpsProxyAgent(proxyUrl);
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console.log(`WebSocket: 已配置 HTTP 代理。正在建立 SSH 连接...`);
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ws.send(JSON.stringify({ type: 'ssh:status', payload: `正在通过 HTTP 代理 ${proxyInfo.name} 连接...` }));
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connectSshClient(ws, sshClient, connectConfig, connInfo); // 通过代理连接 SSH
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} else {
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console.error(`WebSocket: 未知的代理类型: ${proxyInfo.type}`);
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ws.send(JSON.stringify({ type: 'ssh:error', payload: `未知的代理类型: ${proxyInfo.type}` }));
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cleanupSshConnection(ws);
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}
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} catch (proxyProcessError: any) {
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console.error(`处理代理 ${proxyInfo.id} 配置或凭证失败:`, proxyProcessError);
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ws.send(JSON.stringify({ type: 'ssh:error', payload: `无法处理代理配置: ${proxyProcessError.message}` }));
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cleanupSshConnection(ws);
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}
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}).connect(connectConfig); // 使用前面构建的 connectConfig 对象
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} else {
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// 5. 无代理,直接连接
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console.log(`WebSocket: 未配置代理。正在直接建立 SSH 连接...`);
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ws.send(JSON.stringify({ type: 'ssh:status', payload: `正在直接连接到 ${connInfo.host}...` }));
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connectSshClient(ws, sshClient, connectConfig, connInfo); // 直接连接 SSH
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}
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break;
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} // end case 'ssh:connect'
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// --- 处理 SSH 输入 ---
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// --- 处理 SSH 输入 ---
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case 'ssh:input': {
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const connection = activeSshConnections.get(ws);
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@@ -1146,3 +1174,101 @@ export const initializeWebSocket = (server: http.Server, sessionParser: RequestH
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console.log('WebSocket 服务器初始化完成。');
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return wss;
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};
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// --- 辅助函数:建立 SSH 连接并处理事件 ---
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function connectSshClient(ws: AuthenticatedWebSocket, sshClient: Client, connectConfig: any, connInfo: DbConnectionInfo) {
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ws.sshClient = sshClient; // 关联 client
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sshClient.on('ready', () => {
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console.log(`SSH: 用户 ${ws.username} 到 ${connInfo.host} 连接成功!`);
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ws.send(JSON.stringify({ type: 'ssh:status', payload: 'SSH 连接成功,正在打开 Shell...' }));
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// 请求 Shell 通道
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sshClient.shell((err, stream) => {
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if (err) {
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console.error(`SSH: 用户 ${ws.username} 打开 Shell 失败:`, err);
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ws.send(JSON.stringify({ type: 'ssh:error', payload: `打开 Shell 失败: ${err.message}` }));
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cleanupSshConnection(ws);
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return;
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}
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ws.sshShellStream = stream; // 关联 stream
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// 存储活动连接 (此时 sftp 可能还未就绪)
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// 确保 client 和 shell 都存在才存储
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if (activeSshConnections.has(ws)) {
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// 如果已存在(例如 SOCKS 连接后),更新 shell
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const existing = activeSshConnections.get(ws)!;
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existing.shell = stream;
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} else {
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activeSshConnections.set(ws, { client: sshClient, shell: stream });
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}
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console.log(`SSH: 用户 ${ws.username} Shell 通道已打开。`);
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// 尝试初始化 SFTP 会话
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sshClient.sftp((sftpErr, sftp) => {
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if (sftpErr) {
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console.error(`SFTP: 用户 ${ws.username} 初始化失败:`, sftpErr);
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ws.send(JSON.stringify({ type: 'sftp:error', payload: `SFTP 初始化失败: ${sftpErr.message}` }));
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ws.send(JSON.stringify({ type: 'ssh:status', payload: 'Shell 已连接,但 SFTP 初始化失败。' }));
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// SFTP 失败不应断开整个连接,但需要标记
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const existingConn = activeSshConnections.get(ws);
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if (existingConn) {
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// SFTP 失败,但 Shell 仍可用,启动状态轮询
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startStatusPolling(ws, sshClient);
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}
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return;
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}
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console.log(`SFTP: 用户 ${ws.username} 会话已初始化。`);
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const existingConn = activeSshConnections.get(ws);
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if (existingConn) {
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existingConn.sftp = sftp;
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ws.send(JSON.stringify({ type: 'ssh:connected' })); // SFTP 就绪后通知前端
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startStatusPolling(ws, sshClient); // 启动状态轮询
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} else {
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console.error(`SFTP: 无法找到用户 ${ws.username} 的活动连接记录以存储 SFTP 或启动轮询。`);
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ws.send(JSON.stringify({ type: 'ssh:error', payload: '内部服务器错误:无法关联 SFTP 会话。' }));
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cleanupSshConnection(ws);
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}
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});
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// 数据转发:Shell -> WebSocket
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stream.on('data', (data: Buffer) => {
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ws.send(JSON.stringify({
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type: 'ssh:output',
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payload: data.toString('base64'),
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encoding: 'base64'
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}));
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});
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// 处理 Shell 关闭
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stream.on('close', () => {
|
||||
console.log(`SSH: 用户 ${ws.username} Shell 通道已关闭。`);
|
||||
ws.send(JSON.stringify({ type: 'ssh:disconnected', payload: 'Shell 通道已关闭。' }));
|
||||
cleanupSshConnection(ws);
|
||||
});
|
||||
// Stderr 转发
|
||||
stream.stderr.on('data', (data: Buffer) => {
|
||||
console.error(`SSH Stderr (${ws.username}): ${data.toString('utf8').substring(0,100)}...`);
|
||||
ws.send(JSON.stringify({
|
||||
type: 'ssh:output',
|
||||
payload: data.toString('base64'),
|
||||
encoding: 'base64'
|
||||
}));
|
||||
});
|
||||
});
|
||||
}).on('error', (err) => {
|
||||
console.error(`SSH: 用户 ${ws.username} 连接错误:`, err);
|
||||
// 避免在 SOCKS 错误后重复发送错误
|
||||
if (!ws.CLOSED && !ws.CLOSING) { // 检查 WebSocket 状态
|
||||
ws.send(JSON.stringify({ type: 'ssh:error', payload: `SSH 连接错误: ${err.message}` }));
|
||||
}
|
||||
cleanupSshConnection(ws);
|
||||
}).on('close', () => {
|
||||
console.log(`SSH: 用户 ${ws.username} 连接已关闭。`);
|
||||
if (activeSshConnections.has(ws)) {
|
||||
if (!ws.CLOSED && !ws.CLOSING) {
|
||||
ws.send(JSON.stringify({ type: 'ssh:disconnected', payload: 'SSH 连接已关闭。' }));
|
||||
}
|
||||
cleanupSshConnection(ws);
|
||||
}
|
||||
}).connect(connectConfig);
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user