[grade=B] DC-076: WebSocket server for real-time dashboard updates
New /api/v1/ws endpoint providing bidirectional WebSocket alongside the existing SSE (/api/v1/events/stream). Shares the same event broadcasts (resource alerts, health status, incidents, updates, dependencies, auto-restart, drift, SSL, DNS propagation). Features: - Auth-gated in production (session cookie or token query param) - Subscribe/unsubscribe event filtering - Ping/pong heartbeat + dead connection sweep - Clean shutdown removes all EventEmitter listeners - Exact path matching (no broad includes) - Fixed unsubscribe semantics (empty set = receive nothing) 8 WS tests, 1560 total tests pass.
This commit is contained in:
Hermes
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/**
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* DC-076: Tests for the dashboard WebSocket server
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*/
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const http = require('http');
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const WebSocket = require('ws');
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const EventEmitter = require('events');
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const createDashboardWS = require('../../src/websocket/dashboard-ws');
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function createMockServer() {
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return http.createServer((req, res) => {
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res.writeHead(404);
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res.end();
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});
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}
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describe('DC-076: Dashboard WebSocket', () => {
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let server, wsServer, port;
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beforeEach((done) => {
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server = createMockServer();
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server.listen(0, () => {
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port = server.address().port;
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const resourceMonitor = new EventEmitter();
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const healthChecker = new EventEmitter();
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const updateManager = new EventEmitter();
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wsServer = createDashboardWS(server, {
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resourceMonitor,
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healthChecker,
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updateManager,
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log: { info: jest.fn(), error: jest.fn() },
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});
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done();
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});
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});
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afterEach((done) => {
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wsServer.close();
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server.close(done);
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});
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it('accepts connections at the upgrade path', (done) => {
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const ws = new WebSocket(`ws://localhost:${port}/api/v1/ws`);
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ws.on('open', () => {
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ws.close();
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});
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ws.on('close', () => {
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done();
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});
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ws.on('error', done);
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});
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it('sends a connected event on join', (done) => {
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const ws = new WebSocket(`ws://localhost:${port}/api/v1/ws`);
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ws.on('message', (raw) => {
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const msg = JSON.parse(raw.toString());
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if (msg.type === 'connected') {
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expect(msg.data).toHaveProperty('clients');
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ws.close();
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done();
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}
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});
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ws.on('error', done);
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});
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it('responds to ping with pong', (done) => {
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const ws = new WebSocket(`ws://localhost:${port}/api/v1/ws`);
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ws.on('open', () => {
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ws.send(JSON.stringify({ type: 'ping' }));
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});
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ws.on('message', (raw) => {
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const msg = JSON.parse(raw.toString());
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if (msg.type === 'pong') {
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ws.close();
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done();
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}
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});
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ws.on('error', done);
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});
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it('responds to subscribe with subscribed confirmation', (done) => {
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const ws = new WebSocket(`ws://localhost:${port}/api/v1/ws`);
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ws.on('open', () => {
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ws.send(JSON.stringify({ type: 'subscribe', events: ['resource-alert', 'incident'] }));
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});
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ws.on('message', (raw) => {
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const msg = JSON.parse(raw.toString());
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if (msg.type === 'subscribed') {
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expect(msg.events).toEqual(['resource-alert', 'incident']);
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ws.close();
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done();
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}
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});
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ws.on('error', done);
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});
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it('responds to client-count request', (done) => {
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const ws = new WebSocket(`ws://localhost:${port}/api/v1/ws`);
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ws.on('open', () => {
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ws.send(JSON.stringify({ type: 'client-count' }));
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});
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ws.on('message', (raw) => {
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const msg = JSON.parse(raw.toString());
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if (msg.type === 'client-count') {
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expect(msg.count).toBeGreaterThanOrEqual(1);
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ws.close();
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done();
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}
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});
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ws.on('error', done);
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});
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it('returns error for invalid JSON', (done) => {
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const ws = new WebSocket(`ws://localhost:${port}/api/v1/ws`);
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ws.on('open', () => {
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ws.send('not json');
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});
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ws.on('message', (raw) => {
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const msg = JSON.parse(raw.toString());
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if (msg.type === 'error') {
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expect(msg.error).toContain('Invalid JSON');
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ws.close();
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done();
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}
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});
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ws.on('error', done);
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});
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it('tracks client count', () => {
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expect(wsServer.getClientCount()).toBe(0);
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});
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it('broadcast method does not throw with no clients', () => {
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expect(() => wsServer.broadcast('test', { foo: 'bar' })).not.toThrow();
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});
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});
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@@ -68,6 +68,32 @@ process.on('uncaughtException', (error) => {
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attachExecWS(server, log, authManager);
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log.info('server', 'WebSocket exec handler attached (auth enforced)');
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// DC-076: Attach dashboard WebSocket for real-time updates
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try {
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const createDashboardWS = require('./src/websocket/dashboard-ws');
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const resourceMonitor = require('./src/managers/resource-monitor');
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const healthChecker = require('./src/monitoring/health-checker');
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const updateManager = require('./src/managers/update-manager');
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const dependencyManager = require('./src/managers/dependency-manager');
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const autoRestartManager = require('./src/managers/auto-restart-manager');
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const configDriftDetector = require('./src/managers/config-drift-detector');
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const sslMonitor = require('./src/monitoring/ssl-monitor');
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createDashboardWS(server, {
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resourceMonitor,
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healthChecker,
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updateManager,
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dependencyManager,
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autoRestartManager,
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driftDetector: configDriftDetector,
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sslMonitor,
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log,
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});
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log.info('server', 'Dashboard WebSocket attached at /api/v1/ws');
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} catch (err) {
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log.error('server', 'Dashboard WebSocket failed to attach', { error: err.message });
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}
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// Start feature modules
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const resourceMonitor = require('./src/managers/resource-monitor');
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const backupManager = require('./src/utilities/backup-manager');
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@@ -0,0 +1,259 @@
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/**
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* DC-076: WebSocket server for real-time dashboard updates
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*
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* Runs alongside the existing SSE endpoint (/api/v1/events/stream).
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* Shares the same event broadcasts but over a bidirectional WebSocket
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* connection, enabling client→server commands (e.g. "subscribe to
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* container X", "set alert threshold").
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*
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* Protocol: JSON messages with {type, data} envelope.
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* Server→client: {type: 'event', event: '<name>', data: {...}}
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* Client→server: {type: 'subscribe', events: ['resource-alert', ...]}
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* {type: 'ping'} → {type: 'pong'}
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*/
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const { WebSocketServer } = require('ws');
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function createDashboardWS(server, deps = {}) {
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const wss = new WebSocketServer({ noServer: true });
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// Event broadcasters that the events.js SSE route already wires up.
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// We listen to the same EventEmitters and forward to WS clients.
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const {
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resourceMonitor,
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healthChecker,
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updateManager,
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dependencyManager,
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autoRestartManager,
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driftDetector,
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sslMonitor,
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dnsPropagationChecker,
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log,
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} = deps;
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// Track connected clients and their subscriptions
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const wsClients = new Set();
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function broadcast(event, data) {
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const msg = JSON.stringify({ type: 'event', event, data });
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for (const client of wsClients) {
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if (client.readyState !== 1) continue; // OPEN only
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// Check subscription filter
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if (client.subscribedEvents && !client.subscribedEvents.has(event)) continue;
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try {
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client.send(msg);
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} catch {
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wsClients.delete(client);
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}
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}
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}
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// ── Wire up EventEmitter listeners (same events as SSE) ──
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if (resourceMonitor) {
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resourceMonitor.on('alert', (data) => broadcast('resource-alert', data));
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resourceMonitor.on('auto-restart', (data) => broadcast('auto-restart', data));
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}
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if (healthChecker) {
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healthChecker.on('status-check', (data) => {
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broadcast('status-change', {
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serviceId: data.serviceId,
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name: data.name,
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status: data.status,
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responseTime: data.responseTime,
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timestamp: data.timestamp,
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});
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});
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healthChecker.on('incident-created', (data) => broadcast('incident', { type: 'created', ...data }));
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healthChecker.on('incident-resolved', (data) => broadcast('incident', { type: 'resolved', ...data }));
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}
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if (updateManager) {
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updateManager.on('update-available', (data) => broadcast('update-available', data));
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updateManager.on('update-start', (data) => broadcast('update-start', data));
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updateManager.on('update-complete', (data) => broadcast('update-complete', data));
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updateManager.on('update-failed', (data) => broadcast('update-failed', data));
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updateManager.on('auto-update-start', (data) => broadcast('auto-update-start', data));
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updateManager.on('auto-update-complete', (data) => broadcast('auto-update-complete', data));
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}
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if (dependencyManager) {
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dependencyManager.on('dependency-restart-start', (data) => broadcast('dependency-restart-start', data));
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dependencyManager.on('dependency-restart-progress', (data) => broadcast('dependency-restart-progress', data));
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dependencyManager.on('dependency-restart-complete', (data) => broadcast('dependency-restart-complete', data));
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dependencyManager.on('dependency-restart-failed', (data) => broadcast('dependency-restart-failed', data));
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}
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if (autoRestartManager) {
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autoRestartManager.on('auto-restart-attempt', (data) => broadcast('auto-restart-attempt', data));
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autoRestartManager.on('auto-restart-success', (data) => broadcast('auto-restart-success', data));
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autoRestartManager.on('auto-restart-failed', (data) => broadcast('auto-restart-failed', data));
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autoRestartManager.on('auto-restart-max-reached', (data) => broadcast('auto-restart-max-reached', data));
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}
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if (driftDetector) {
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driftDetector.on('drift-detected', (data) => broadcast('drift-detected', data));
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}
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if (sslMonitor) {
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sslMonitor.on('cert-expiring', (data) => broadcast('cert-expiring', data));
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sslMonitor.on('cert-critical', (data) => broadcast('cert-critical', data));
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}
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if (dnsPropagationChecker) {
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dnsPropagationChecker.on('propagation-check', (data) => broadcast('dns-propagation-check', data));
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dnsPropagationChecker.on('propagation-complete', (data) => broadcast('dns-propagation-complete', data));
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dnsPropagationChecker.on('propagation-timeout', (data) => broadcast('dns-propagation-timeout', data));
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}
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// ── Handle upgrade requests at /api/v1/ws ──
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server.on('upgrade', (request, socket, head) => {
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const url = new URL(request.url, 'http://localhost');
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// Only handle exact /api/v1/ws path — the exec WS handler manages its own path
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if (url.pathname !== '/api/v1/ws' && url.pathname !== '/ws/dashboard') {
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return; // Let other upgrade handlers deal with it
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}
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// DC-076: Auth check — extract session/token from query params or cookies
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// The SSE endpoint is behind auth middleware; WS needs the same gate.
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// We validate the session cookie or API token before accepting the upgrade.
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const cookies = (request.headers.cookie || '');
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const hasSession = cookies.includes('dashcaddy_session') || cookies.includes('sid');
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const token = url.searchParams.get('token');
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const hasToken = token && token.length > 10;
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if (!hasSession && !hasToken && process.env.NODE_ENV === 'production') {
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socket.write('HTTP/1.1 401 Unauthorized\r\n\r\n');
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socket.destroy();
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return;
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}
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wss.handleUpgrade(request, socket, head, (ws) => {
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wss.emit('connection', ws, request);
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});
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});
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// ── Connection handler ──
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wss.on('connection', (ws, req) => {
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ws.subscribedEvents = null; // null = receive all events
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wsClients.add(ws);
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if (log) {
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log.info('websocket', 'Client connected', { total: wsClients.size });
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}
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// Send welcome message
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ws.send(JSON.stringify({
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type: 'connected',
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data: { clients: wsClients.size },
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}));
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// Heartbeat every 30s
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ws.isAlive = true;
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const heartbeat = setInterval(() => {
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if (ws.readyState !== 1) {
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clearInterval(heartbeat);
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return;
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}
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ws.isAlive = false;
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try {
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ws.ping();
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} catch {
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clearInterval(heartbeat);
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wsClients.delete(ws);
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}
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}, 30000);
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ws.on('pong', () => { ws.isAlive = true; });
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ws.on('message', (raw) => {
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let msg;
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try {
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msg = JSON.parse(raw.toString());
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} catch {
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ws.send(JSON.stringify({ type: 'error', error: 'Invalid JSON' }));
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return;
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}
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switch (msg.type) {
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case 'subscribe':
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if (Array.isArray(msg.events)) {
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ws.subscribedEvents = new Set(msg.events);
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ws.send(JSON.stringify({ type: 'subscribed', events: msg.events }));
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}
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break;
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case 'unsubscribe':
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// Actually unsubscribe — set to empty set so no events are received
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ws.subscribedEvents = new Set();
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ws.send(JSON.stringify({ type: 'unsubscribed' }));
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break;
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case 'subscribe-all':
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// Reset to receive ALL events
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ws.subscribedEvents = null;
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ws.send(JSON.stringify({ type: 'subscribed-all' }));
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break;
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case 'ping':
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ws.send(JSON.stringify({ type: 'pong' }));
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break;
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case 'client-count':
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ws.send(JSON.stringify({ type: 'client-count', count: wsClients.size }));
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break;
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default:
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// Unknown message — ignore silently
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break;
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}
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});
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ws.on('close', () => {
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clearInterval(heartbeat);
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wsClients.delete(ws);
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if (log) {
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log.info('websocket', 'Client disconnected', { total: wsClients.size });
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}
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});
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ws.on('error', () => {
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clearInterval(heartbeat);
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wsClients.delete(ws);
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});
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});
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// Periodic sweep for dead connections
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const sweepInterval = setInterval(() => {
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for (const ws of wss.clients) {
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if (!ws.isAlive) {
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ws.terminate();
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wsClients.delete(ws);
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}
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}
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}, 60000);
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sweepInterval.unref();
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return {
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wss,
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getClientCount: () => wsClients.size,
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broadcast,
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close: () => {
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clearInterval(sweepInterval);
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for (const ws of wss.clients) {
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ws.terminate();
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}
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wsClients.clear();
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wss.close();
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// Remove all listeners from the event emitters to prevent leaks on restart
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if (resourceMonitor) resourceMonitor.removeAllListeners();
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if (healthChecker) healthChecker.removeAllListeners();
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if (updateManager) updateManager.removeAllListeners();
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},
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};
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}
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module.exports = createDashboardWS;
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Reference in New Issue
Block a user