VNC setup

client/src/services/vnc.mjs

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+import express from 'express';
+import net from 'node:net';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { registerSocket } from './websocket.mjs';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const NOVNC = path.join(__dirname, '../node_modules/@novnc/novnc');
+const VNC_HOST = process.env.VNC_HOST || '127.0.0.1';
+const VNC_PORT = process.env.VNC_PORT || 5900;
+
+export const vncRouter = express.Router();
+vncRouter.use('/novnc', express.static(NOVNC));
+vncRouter.get('/', (req, res) => res.sendFile(path.join(__dirname, '../public/vnc.html')));
+
+// Namespaced so other websocket features can register alongside this one
+const wss = registerSocket('/ws/vnc', {
+	handleProtocols: protocols => (protocols.has('binary') ? 'binary' : false)
+});
+
+wss.on('connection', ws => {
+	console.log('VNC client connected');
+	const socket = net.createConnection(VNC_PORT, VNC_HOST);
+
+	socket.on('data', data => {
+		if (ws.readyState === ws.OPEN) ws.send(data, { binary: true });
+	});
+
+	ws.on('message', data => {
+		const buffer = Buffer.isBuffer(data) ? data : Buffer.from(data);
+		if (socket.writable) socket.write(buffer);
+	});
+
+	ws.on('error', error => {
+		console.error('VNC websocket error:', error.message);
+		socket.destroy();
+	});
+
+	ws.on('close', (code, reason) => {
+		console.log(`VNC browser disconnected: ${code}${reason?.length ? ` ${reason}` : ''}`);
+		socket.destroy();
+	});
+
+	socket.on('error', error => {
+		console.error('VNC socket error:', error.message);
+		if (ws.readyState === ws.OPEN) ws.close();
+	});
+
+	socket.on('close', () => {
+		console.log('VNC socket closed');
+		if (ws.readyState === ws.OPEN) ws.close();
+	});
+});

client/src/services/websocket.mjs

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+import { WebSocketServer } from 'ws';
+
+/** Registry of path -> WebSocketServer, letting multiple namespaced sockets share one HTTP server. */
+const sockets = new Map();
+
+/**
+ * Register a WebSocketServer under an exact path (e.g. '/ws/vnc').
+ * @param {string} path
+ * @param {object} [options] - extra ws.Server options (handleProtocols, etc.)
+ * @returns {WebSocketServer}
+ */
+export function registerSocket(path, options = {}) {
+	if (sockets.has(path)) throw new Error(`Socket already registered on ${path}`);
+	const wss = new WebSocketServer({ noServer: true, ...options });
+	sockets.set(path, wss);
+	return wss;
+}
+
+/**
+ * Attach one 'upgrade' listener to the HTTP server that routes to the
+ * registered WebSocketServer matching the request path.
+ * @param {import('http').Server} server
+ */
+export function attachUpgrade(server) {
+	server.on('upgrade', (req, socket, head) => {
+		const { pathname } = new URL(req.url, `http://${req.headers.host}`);
+		const wss = sockets.get(pathname);
+		if (!wss) return socket.destroy();
+		wss.handleUpgrade(req, socket, head, ws => wss.emit('connection', ws, req));
+	});
+}