mirror of
https://github.com/UNITRONIX/BetterDesk.git
synced 2026-09-10 09:35:39 +00:00
UNITRONIX
86582d84cb
Add typography support and a text-based logo option plus several TLS/connectivity improvements. Introduces a new font service (web-nodejs/services/fontService.js) to search, download and serve Google Fonts for self-hosting, new API routes for font management, and client-side font picker UI/logic (settings.js) with CSS (pages.css, main.css) and i18n entries (en/pl/zh). BrandingService now supports logo text/accent and font heading/body and includes generated font CSS. Views (login/sidebar) updated to render text logos and a new theme (themes/insolve.json) added. Server and TLS updates: API server now prefers TLS on the API port when valid certs exist, and dual-mode listener in tls.go adds a short peek timeout to avoid deadlocks with RustDesk clients.
631 lines
26 KiB
JavaScript
631 lines
26 KiB
JavaScript
/**
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* BetterDesk Console - Server Entry Point
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* Professional Web Management Panel for RustDesk Server
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*
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* @author UNITRONIX
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* @version 2.1.0
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* @license Apache-2.0
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*/
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const express = require('express');
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const session = require('express-session');
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const cookieParser = require('cookie-parser');
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const path = require('path');
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const fs = require('fs');
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const http = require('http');
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const https = require('https');
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const config = require('./config/config');
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const securityMiddleware = require('./middleware/security');
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const { initI18n } = require('./middleware/i18n');
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const { apiLimiter } = require('./middleware/rateLimiter');
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const { csrfTokenProvider, doubleCsrfProtection, downgradeToHttp: csrfDowngradeToHttp } = require('./middleware/csrf');
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const { roleHasPermission, isSuperAdminRole } = require('./middleware/auth');
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const authService = require('./services/authService');
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const serverBackend = require('./services/serverBackend');
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const db = require('./services/database');
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const { initWsProxy } = require('./services/wsRelay');
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const { initBdRelay } = require('./services/bdRelay');
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const { initChatRelay } = require('./services/chatRelay');
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const { apiClient: goApiClient } = require('./services/betterdeskApi');
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const { initRemoteRelay } = require('./services/remoteRelay');
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const { initCdapTerminalProxy } = require('./services/cdapTerminalProxy');
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const { initCdapMediaProxies } = require('./services/cdapMediaProxy');
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const { startDiscoveryService } = require('./services/lanDiscovery');
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const { initDeviceStatusPush } = require('./services/deviceStatusPush');
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const routes = require('./routes');
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const rustdeskApiRoutes = require('./routes/rustdesk-api.routes');
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const bdApiRoutes = require('./routes/bd-api.routes');
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const { getWanMiddlewareStack } = require('./middleware/wanSecurity');
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// Create Express app
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const app = express();
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// Trust proxy (for rate limiting behind reverse proxy)
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// Configurable via TRUST_PROXY env var: 0=disabled, 1=single proxy, 'loopback'=localhost only
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// Default: false (safest). Set TRUST_PROXY=1 when behind nginx/Apache/cloudflare
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const trustProxy = process.env.TRUST_PROXY !== undefined ?
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(isNaN(process.env.TRUST_PROXY) ? process.env.TRUST_PROXY : parseInt(process.env.TRUST_PROXY, 10)) : false;
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app.set('trust proxy', trustProxy);
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// View engine setup
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app.set('view engine', 'ejs');
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app.set('views', path.join(__dirname, 'views'));
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// Ensure data directory exists
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if (!fs.existsSync(config.dataDir)) {
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fs.mkdirSync(config.dataDir, { recursive: true });
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}
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// ============ Middleware Pipeline ============
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// Security headers (Helmet)
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app.use(securityMiddleware);
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// CORS for BetterDesk desktop clients (Tauri webview origins)
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app.use('/api/', (req, res, next) => {
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const origin = req.headers.origin || '';
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const allowed = [
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'http://localhost:1420', // Tauri dev
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'tauri://localhost', // Tauri production (macOS/Linux)
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'https://tauri.localhost', // Tauri production (Windows)
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];
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if (allowed.includes(origin)) {
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res.setHeader('Access-Control-Allow-Origin', origin);
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res.setHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, PATCH, DELETE, OPTIONS');
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res.setHeader('Access-Control-Allow-Headers', 'Content-Type, Authorization, X-API-Key, X-CSRF-Token');
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res.setHeader('Access-Control-Allow-Credentials', 'true');
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res.setHeader('Access-Control-Max-Age', '86400');
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}
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if (req.method === 'OPTIONS') return res.sendStatus(204);
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next();
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});
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// Body parsing (2MB limit for base64 logo images)
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app.use(express.json({ limit: '2mb' }));
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app.use(express.urlencoded({ extended: false, limit: '2mb' }));
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// Cookie parsing
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app.use(cookieParser());
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// Session management — also kept as a standalone middleware ref for WebSocket upgrades
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// Use a different cookie name in HTTP mode to avoid collision with stale
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// Secure cookies left over from a previous HTTPS configuration (Issue #82).
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const SESSION_COOKIE = config.httpsEnabled ? 'betterdesk.sid' : 'bd.sid';
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const sessionMiddleware = session({
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secret: config.sessionSecret,
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name: SESSION_COOKIE,
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resave: false,
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saveUninitialized: false,
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cookie: {
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secure: config.httpsEnabled,
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httpOnly: true,
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sameSite: 'lax',
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maxAge: config.sessionMaxAge
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}
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});
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app.use(sessionMiddleware);
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// Cache version — changes on every restart/deployment, stable during runtime.
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// Used in ?v= query strings so browsers cache assets per deployment.
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app.locals.cacheVersion = config.appVersion + '.' + Date.now();
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// Static files
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app.use(express.static(path.join(__dirname, 'public'), {
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maxAge: config.isProduction ? '7d' : '0',
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etag: true
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}));
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// Serve proto files for remote client (protobufjs dynamic loading)
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app.use('/protos', express.static(path.join(__dirname, 'protos'), {
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maxAge: config.isProduction ? '7d' : '0',
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etag: true
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}));
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// Serve desktop wallpapers
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app.use('/wallpapers', express.static(path.join(__dirname, 'wallpapers'), {
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maxAge: config.isProduction ? '30d' : '0',
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etag: true,
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immutable: true
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}));
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// Rate limiting for API
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app.use('/api/', apiLimiter);
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// RustDesk Client API — mounted BEFORE CSRF because desktop clients use Bearer
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// token auth, not cookie-based CSRF. These routes are also served on the
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// dedicated WAN-facing port (21121) with additional hardening.
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app.use(rustdeskApiRoutes);
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// BetterDesk Desktop Client API — device-facing endpoints that use
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// Bearer token or X-Device-Id header, not browser CSRF cookies.
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app.use('/api/bd', bdApiRoutes);
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// i18n middleware
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app.use(initI18n());
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// Embed mode — when ?embed=1 is present, layout renders without sidebar/navbar
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// Used by Desktop Mode to load pages inside floating windows (iframes)
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app.use((req, res, next) => {
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res.locals.embed = req.query.embed === '1';
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// Inject permission helper for EJS templates (sidebar/button visibility)
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const role = req.session?.user?.role;
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res.locals.hasPermission = (perm) => role ? roleHasPermission(role, perm) : false;
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res.locals.isSuperAdmin = role ? isSuperAdminRole(role) : false;
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// Prevent HTML page caching — only static assets should be cached
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if (!req.path.match(/\.(js|css|png|jpg|jpeg|gif|svg|ico|woff2?|ttf|eot|map|proto)$/)) {
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res.set('Cache-Control', 'no-cache, no-store, must-revalidate');
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}
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next();
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});
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// CSRF protection — generate token for views, validate on POST/PUT/DELETE/PATCH
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// Skip CSRF for device-facing API routes (/api/bd/*) — these use Bearer token
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// or X-Device-Id header authentication, not browser cookie-based CSRF.
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app.use(csrfTokenProvider);
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app.use((req, res, next) => {
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if (req.path.startsWith('/api/bd/')) {
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return next();
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}
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// Skip CSRF for BetterDesk desktop clients (Tauri) — they are not
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// vulnerable to CSRF attacks (not browser tabs). Identified by origin.
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const origin = req.headers.origin || '';
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const tauriOrigins = ['http://localhost:1420', 'tauri://localhost', 'https://tauri.localhost'];
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if (req.path.startsWith('/api/') && tauriOrigins.includes(origin)) {
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return next();
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}
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doubleCsrfProtection(req, res, next);
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});
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// ============ Routes ============
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app.use('/', routes);
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// ============ Error Handlers ============
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// CSRF token mismatch
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app.use((err, req, res, next) => {
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if (err.code === 'EBADCSRFTOKEN' || err.message?.includes('csrf') || err.message?.includes('CSRF')) {
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res.status(403);
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// Detect likely SSL→HTTP transition: cookie missing because browser held Secure cookie
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const likelySslTransition = !config.httpsEnabled && !req.secure;
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const hint = likelySslTransition
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? ' If you recently disabled SSL, clear your browser cookies for this site and reload.'
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: '';
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// Always return JSON for API routes (fetch sends Accept: */*)
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if (req.path.startsWith('/api/') || (req.headers['content-type'] && req.headers['content-type'].includes('application/json'))) {
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return res.json({ success: false, error: 'Invalid CSRF token. Please refresh the page and try again.' + hint });
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}
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if (req.accepts('html')) {
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return res.render('errors/500', {
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title: 'Forbidden',
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activePage: 'error',
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error: 'Invalid or missing CSRF token. Please refresh the page and try again.' + hint
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});
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}
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return res.json({ success: false, error: 'Invalid CSRF token' + hint });
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}
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next(err);
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});
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// 404 Not Found
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app.use((req, res, next) => {
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res.status(404);
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if (req.accepts('html')) {
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res.render('errors/404', {
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title: req.t ? req.t('errors.not_found') : 'Not Found',
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activePage: 'error'
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});
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} else {
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res.json({
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success: false,
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error: 'Not Found'
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});
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}
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});
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// 500 Server Error
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app.use((err, req, res, next) => {
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console.error('Server error:', err);
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res.status(err.status || 500);
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// Always return JSON for API routes
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if (req.path.startsWith('/api/') || (req.headers['content-type'] && req.headers['content-type'].includes('application/json'))) {
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return res.json({
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success: false,
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error: config.isProduction ? 'Internal Server Error' : err.message
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});
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}
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if (req.accepts('html')) {
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res.render('errors/500', {
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title: req.t ? req.t('errors.server_error') : 'Server Error',
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activePage: 'error',
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error: config.isProduction ? null : err.message
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});
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} else {
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res.json({
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success: false,
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error: config.isProduction ? 'Internal Server Error' : err.message
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});
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}
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});
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// ============ Startup ============
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/**
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* Load SSL certificates for HTTPS
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*/
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function loadSslCertificates() {
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const options = {};
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if (!config.sslCertPath || !config.sslKeyPath) {
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return null;
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}
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try {
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if (!fs.existsSync(config.sslCertPath)) {
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console.error(`SSL certificate not found: ${config.sslCertPath}`);
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return null;
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}
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if (!fs.existsSync(config.sslKeyPath)) {
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console.error(`SSL private key not found: ${config.sslKeyPath}`);
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return null;
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}
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options.cert = fs.readFileSync(config.sslCertPath);
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options.key = fs.readFileSync(config.sslKeyPath);
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// Optional CA bundle (for Let's Encrypt chain)
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if (config.sslCaPath && fs.existsSync(config.sslCaPath)) {
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options.ca = fs.readFileSync(config.sslCaPath);
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}
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return options;
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} catch (err) {
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console.error('Failed to load SSL certificates:', err.message);
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return null;
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}
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}
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/**
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* Create HTTP redirect server (redirects all HTTP to HTTPS)
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*/
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function createHttpRedirectServer() {
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const redirectApp = express();
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redirectApp.use((req, res) => {
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const httpsUrl = `https://${req.hostname}:${config.httpsPort}${req.url}`;
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res.redirect(301, httpsUrl);
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});
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return http.createServer(redirectApp);
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}
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async function startServer() {
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try {
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// Initialize database adapter (creates tables, runs migrations)
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await db.init();
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// Warm branding cache from database (must run after db.init)
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const brandingService = require('./services/brandingService');
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await brandingService.loadBranding();
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// Ensure default admin exists
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await authService.ensureDefaultAdmin();
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let server;
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let protocol = 'http';
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let displayPort = config.port;
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// HTTPS mode
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if (config.httpsEnabled) {
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const sslOptions = loadSslCertificates();
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if (sslOptions) {
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// Create HTTPS server
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server = https.createServer(sslOptions, app);
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protocol = 'https';
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displayPort = config.httpsPort;
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server.listen(config.httpsPort, config.host, () => {
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printStartupBanner(protocol, displayPort);
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});
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// Optionally start HTTP redirect server
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if (config.httpRedirect) {
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const redirectServer = createHttpRedirectServer();
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redirectServer.listen(config.port, config.host, () => {
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console.log(` HTTP -> HTTPS redirect active on port ${config.port}`);
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console.log('');
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});
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// Graceful shutdown for redirect server too
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const shutdownRedirect = () => { redirectServer.close(); };
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process.on('SIGTERM', shutdownRedirect);
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process.on('SIGINT', shutdownRedirect);
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}
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} else {
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console.warn('WARNING: HTTPS enabled but certificates not found/invalid');
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console.warn('Falling back to HTTP mode');
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console.warn(' → Session and CSRF cookies downgraded to non-Secure');
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console.warn(' → Fix: check SSL_CERT_PATH and SSL_KEY_PATH in .env');
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// BD-2026-082: Downgrade cookie flags to match actual HTTP mode.
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// Session middleware was initialised with secure:true at module
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// load time. Without this fixup, browsers would ignore all
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// cookies and every request would fail CSRF validation.
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if (sessionMiddleware && sessionMiddleware.options) {
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sessionMiddleware.options.cookie = sessionMiddleware.options.cookie || {};
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sessionMiddleware.options.cookie.secure = false;
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}
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csrfDowngradeToHttp();
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server = http.createServer(app);
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server.listen(config.port, config.host, () => {
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printStartupBanner(protocol, config.port);
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});
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}
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} else {
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// HTTP mode (default)
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server = http.createServer(app);
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server.listen(config.port, config.host, () => {
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printStartupBanner(protocol, config.port);
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});
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}
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// Initialize WebSocket proxy for remote desktop client
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initWsProxy(server, sessionMiddleware);
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// Initialize BetterDesk native relay (WebSocket)
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initBdRelay(server);
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// Initialize Chat relay (WebSocket — agent ↔ operator, persistent via Go API)
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initChatRelay(server, sessionMiddleware, goApiClient);
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// Initialize Remote Desktop relay (WebSocket — agent JPEG ↔ browser viewer)
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initRemoteRelay(server, sessionMiddleware);
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// Initialize CDAP Terminal WebSocket proxy (browser ↔ Go server)
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initCdapTerminalProxy(server, sessionMiddleware);
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// Initialize CDAP Media WebSocket proxies (desktop, video, file browser)
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initCdapMediaProxies(server, sessionMiddleware);
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// Initialize real-time device status push (Go event bus → browser)
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initDeviceStatusPush(server, sessionMiddleware, config.betterdeskApiUrl, config.betterdeskApiKey);
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// Start LAN Discovery UDP service
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startDiscoveryService();
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// ============ RustDesk Client API Server (dedicated port) ============
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let apiServer = null;
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if (config.apiEnabled) {
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apiServer = startRustDeskApiServer();
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}
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// ============ Periodic Housekeeping ============
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const housekeepingInterval = setInterval(async () => {
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await authService.cleanupHousekeeping();
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// Clean up old integration data (metrics >7d, audit >90d)
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try {
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await db.runIntegrationHousekeeping();
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} catch (err) {
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// Silent fail — don't crash the server for housekeeping
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}
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}, 60 * 60 * 1000); // Every hour
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// ============ Periodic Online Status Sync ============
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const syncInterval = parseInt(process.env.STATUS_SYNC_INTERVAL, 10) || 15; // seconds
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const heartbeatStaleThreshold = parseInt(process.env.HEARTBEAT_STALE_THRESHOLD, 10) || 90; // seconds
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const statusSyncInterval = setInterval(async () => {
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try {
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await serverBackend.syncOnlineStatus();
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} catch (err) {
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// Silent fail - don't crash the server
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}
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// Also clean up stale heartbeat-based online status
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try {
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if (typeof db.cleanupStaleOnlinePeers === 'function') {
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await db.cleanupStaleOnlinePeers(heartbeatStaleThreshold);
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}
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} catch (err) {
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// Silent fail
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}
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}, syncInterval * 1000);
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// Initial sync on startup (after short delay for HBBS to be ready)
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setTimeout(async () => {
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try {
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const result = await serverBackend.syncOnlineStatus();
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if (result.synced > 0) {
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console.log(`Initial status sync: ${result.synced} device(s) online`);
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}
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} catch (err) {
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// Silent fail
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}
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}, 5000);
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// Graceful shutdown
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const shutdown = (signal) => {
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console.log(`\n${signal} received. Shutting down gracefully...`);
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clearInterval(housekeepingInterval);
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clearInterval(statusSyncInterval);
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const closePromises = [new Promise(r => server.close(r))];
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if (apiServer) {
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closePromises.push(new Promise(r => apiServer.close(r)));
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}
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Promise.all(closePromises).then(() => {
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console.log('All servers closed.');
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process.exit(0);
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});
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// Force exit after 10 seconds
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setTimeout(() => {
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console.error('Forced shutdown after timeout');
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process.exit(1);
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}, 10000);
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};
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process.on('SIGTERM', () => shutdown('SIGTERM'));
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process.on('SIGINT', () => shutdown('SIGINT'));
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} catch (err) {
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console.error('Failed to start server:', err);
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process.exit(1);
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}
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}
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/**
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* Start the dedicated RustDesk Client API server on a separate port.
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* This is a minimal, hardened Express app with only 4 endpoints.
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* Designed for WAN/internet exposure with aggressive security.
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*/
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function startRustDeskApiServer() {
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const apiApp = express();
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// Trust proxy (use same configuration as main app — TRUST_PROXY env var)
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apiApp.set('trust proxy', trustProxy);
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// Apply WAN security middleware stack
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const wanMiddleware = getWanMiddlewareStack();
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for (const mw of wanMiddleware) {
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apiApp.use(mw);
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}
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// JSON body parser with size limit (64KB for address book sync)
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apiApp.use(express.json({ limit: '64kb', strict: true }));
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// Mount RustDesk-compatible API routes
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apiApp.use('/', rustdeskApiRoutes);
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// Mount device-facing registration routes (LAN discovery pairing)
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const registrationRoutes = require('./routes/registration.routes');
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apiApp.use('/api/bd', registrationRoutes);
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// Catch-all for any unmatched routes (should not reach here due to pathWhitelist)
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apiApp.use((req, res) => {
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res.status(404).end();
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});
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// Error handler — never leak internal errors
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apiApp.use((err, req, res, next) => {
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if (err.type === 'entity.parse.failed') {
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console.warn('RustDesk API: JSON parse error from', req.socket?.remoteAddress);
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return res.status(400).json({ error: 'Invalid JSON' });
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}
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if (err.type === 'entity.too.large') {
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return res.status(413).json({ error: 'Request too large' });
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}
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console.error('RustDesk API error:', err.message);
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res.status(500).json({ error: 'Server error' });
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});
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// Start HTTP or HTTPS server for RustDesk Client API
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// Port 21121 is internet-facing — always use TLS if valid certs are available,
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// regardless of HTTPS_ENABLED (which controls the admin panel port).
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let apiServerInstance;
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const sslOptions = loadSslCertificates();
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if (sslOptions) {
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apiServerInstance = https.createServer(sslOptions, apiApp);
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console.log(` ║ API TLS: Enabled (HTTPS on :${config.apiPort})`.padEnd(53) + '║');
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} else {
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if (config.sslCertPath || config.sslKeyPath) {
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console.warn(`WARNING: SSL certs configured but invalid — API running insecure HTTP on :${config.apiPort}`);
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}
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apiServerInstance = http.createServer(apiApp);
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}
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apiServerInstance.on('error', (err) => {
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if (err.code === 'EADDRINUSE') {
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console.error(` ║ API Port: ${config.apiPort} FAILED (port in use)`.padEnd(53) + '║');
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console.error(` ║ Hint: Check if hbbs uses the same port, or`.padEnd(53) + '║');
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console.error(` ║ set API_PORT env var (default: 21121)`.padEnd(53) + '║');
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console.log(' ║ ║');
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console.error(`WARNING: RustDesk Client API could not start on port ${config.apiPort}`);
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console.error('Likely cause: hbbs API is on the same port. Client API default is 21121.');
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console.error('The admin panel continues to run normally on port ' + config.port);
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return; // Don't crash — let the panel continue running
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}
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throw err;
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});
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apiServerInstance.listen(config.apiPort, config.apiHost, () => {
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console.log(` ║ API Port: ${config.apiPort} (RustDesk Client)`.padEnd(53) + '║');
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console.log(' ║ ║');
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});
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// Set connection timeout (prevent slow loris)
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apiServerInstance.headersTimeout = 15000;
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apiServerInstance.requestTimeout = 10000;
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apiServerInstance.keepAliveTimeout = 5000;
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return apiServerInstance;
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}
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/**
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* Print startup banner with server info
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*/
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function printStartupBanner(protocol, port) {
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const sslStatus = config.httpsEnabled ? '🔒 HTTPS' : '🔓 HTTP';
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// API port 21121 auto-enables TLS if valid certs exist (regardless of HTTPS_ENABLED)
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const apiHasCerts = config.sslCertPath && config.sslKeyPath &&
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fs.existsSync(config.sslCertPath) && fs.existsSync(config.sslKeyPath);
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const apiProtocol = apiHasCerts ? 'HTTPS' : 'HTTP';
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const apiStatus = config.apiEnabled ? `✅ Port ${config.apiPort} (${apiProtocol})` : '❌ Disabled';
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const panelUrl = `${protocol}://${config.host}:${port}`;
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console.log('');
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console.log(' ╔══════════════════════════════════════════════════╗');
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console.log(' ║ ║');
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console.log(' ║ 🖥️ BetterDesk Console v' + config.appVersion.padEnd(23) + ' ║');
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console.log(' ║ ║');
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console.log(' ╠══════════════════════════════════════════════════╣');
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console.log(' ║ ║');
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console.log(` ║ Panel: ${panelUrl}`.padEnd(53) + '║');
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if (config.httpsEnabled && config.httpRedirect) {
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console.log(` ║ Redirect: http://${config.host}:${config.port} → :${config.httpsPort}`.padEnd(53) + '║');
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}
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console.log(` ║ Client API: ${apiStatus}`.padEnd(53) + '║');
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console.log(` ║ Go API: http://localhost:21114/api`.padEnd(53) + '║');
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console.log(` ║ Mode: ${config.nodeEnv}`.padEnd(53) + '║');
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console.log(` ║ Security: ${sslStatus}`.padEnd(53) + '║');
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const dbLabel = (db.DB_TYPE === 'postgres' || db.DB_TYPE === 'postgresql')
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? `PostgreSQL (${process.env.DATABASE_URL ? new URL(process.env.DATABASE_URL).hostname : 'localhost'})`
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: path.basename(config.dbPath);
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console.log(` ║ Database: ${dbLabel}`.padEnd(53) + '║');
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console.log(` ║ Keys: ${config.keysPath}`.padEnd(53) + '║');
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console.log(' ║ ║');
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console.log(' ╚══════════════════════════════════════════════════╝');
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console.log('');
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// BD-2026-006: Warn if panel is bound to all interfaces in non-Docker environments
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if (config.host === '0.0.0.0' && !config.isDocker) {
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console.log(' ⚠️ WARNING [SECURITY]: Panel bound to 0.0.0.0 (all interfaces).');
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console.log(' Set HOST=127.0.0.1 in .env to restrict to localhost only.');
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console.log('');
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}
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// BD-2026-008: Warn if plaintext credentials file exists
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const credFile = path.join(config.keysPath, '.admin_credentials');
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if (fs.existsSync(credFile)) {
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console.log(' ⚠️ WARNING [SECURITY]: Plaintext .admin_credentials file detected.');
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console.log(' Delete it after noting the password: ' + credFile);
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console.log('');
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}
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// BD-2026-009: Warn when proxy trust is enabled
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if (trustProxy && trustProxy !== false && trustProxy !== 0) {
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console.log(' ⚠️ NOTICE [SECURITY]: TRUST_PROXY is enabled (' + trustProxy + ').');
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console.log(' Ensure a trusted reverse proxy sets X-Forwarded-For correctly.');
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console.log('');
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}
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}
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// Start the server
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startServer();
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module.exports = app;
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