Juergen Kunz
9521f2e044
- Added `socket2` dependency for socket options. - Introduced `keep_alive`, `keep_alive_initial_delay_ms`, and `max_connections` fields in `ConnectionConfig`. - Implemented TCP keepalive settings in `TcpListenerManager` for both client and backend connections. - Created a new `ConnectionPool` for managing idle HTTP/1.1 and HTTP/2 connections to reduce overhead. - Enhanced TLS configuration to support ALPN for HTTP/2. - Added performance tests for connection pooling, stability, and concurrent connections.
492 lines
16 KiB
TypeScript
492 lines
16 KiB
TypeScript
import { tap, expect } from '@git.zone/tstest/tapbundle';
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import { SmartProxy } from '../ts/index.js';
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import * as http from 'http';
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import * as https from 'https';
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import * as http2 from 'http2';
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import * as net from 'net';
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import * as tls from 'tls';
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import * as fs from 'fs';
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import * as path from 'path';
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// ---------------------------------------------------------------------------
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// Port assignments (47600–47620 range to avoid conflicts)
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// ---------------------------------------------------------------------------
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const HTTP_ECHO_PORT = 47600; // backend HTTP echo server
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const PROXY_HTTP_PORT = 47601; // SmartProxy plain HTTP forwarding
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const PROXY_HTTPS_PORT = 47602; // SmartProxy TLS-terminate HTTPS forwarding
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const TCP_ECHO_PORT = 47603; // backend TCP echo server
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const PROXY_TCP_PORT = 47604; // SmartProxy plain TCP forwarding
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// ---------------------------------------------------------------------------
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// Shared state
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// ---------------------------------------------------------------------------
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let httpEchoServer: http.Server;
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let tcpEchoServer: net.Server;
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let proxy: SmartProxy;
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const certPem = fs.readFileSync(path.join(import.meta.dirname, '..', 'assets', 'certs', 'cert.pem'), 'utf8');
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const keyPem = fs.readFileSync(path.join(import.meta.dirname, '..', 'assets', 'certs', 'key.pem'), 'utf8');
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// ---------------------------------------------------------------------------
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// Helper: make an HTTP request and return { status, body }
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// ---------------------------------------------------------------------------
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function httpRequest(
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options: http.RequestOptions,
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body?: string,
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): Promise<{ status: number; body: string }> {
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return new Promise((resolve, reject) => {
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const req = http.request(options, (res) => {
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let data = '';
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res.on('data', (chunk: string) => (data += chunk));
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res.on('end', () => resolve({ status: res.statusCode!, body: data }));
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});
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req.on('error', reject);
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req.setTimeout(5000, () => {
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req.destroy(new Error('timeout'));
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});
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if (body) req.end(body);
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else req.end();
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});
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}
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// Same but for HTTPS
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function httpsRequest(
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options: https.RequestOptions,
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body?: string,
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): Promise<{ status: number; body: string }> {
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return new Promise((resolve, reject) => {
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const req = https.request(options, (res) => {
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let data = '';
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res.on('data', (chunk: string) => (data += chunk));
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res.on('end', () => resolve({ status: res.statusCode!, body: data }));
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});
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req.on('error', reject);
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req.setTimeout(5000, () => {
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req.destroy(new Error('timeout'));
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});
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if (body) req.end(body);
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else req.end();
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});
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}
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// Helper: wait for metrics to settle on a condition
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async function waitForMetrics(
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metrics: ReturnType<SmartProxy['getMetrics']>,
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condition: () => boolean,
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maxWaitMs = 3000,
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): Promise<void> {
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const start = Date.now();
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while (Date.now() - start < maxWaitMs) {
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// Force a fresh poll
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await (proxy as any).metricsAdapter.poll();
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if (condition()) return;
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await new Promise((r) => setTimeout(r, 100));
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}
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}
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// ===========================================================================
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// 1. Setup backend servers
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// ===========================================================================
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tap.test('setup - backend servers', async () => {
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// HTTP echo server: POST → echo:<body>, GET → ok
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httpEchoServer = http.createServer((req, res) => {
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if (req.method === 'POST') {
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let body = '';
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req.on('data', (chunk: string) => (body += chunk));
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req.on('end', () => {
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res.writeHead(200, { 'Content-Type': 'text/plain' });
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res.end(`echo:${body}`);
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});
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} else {
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res.writeHead(200, { 'Content-Type': 'text/plain' });
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res.end('ok');
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}
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});
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await new Promise<void>((resolve, reject) => {
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httpEchoServer.on('error', reject);
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httpEchoServer.listen(HTTP_ECHO_PORT, () => {
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console.log(`HTTP echo server on port ${HTTP_ECHO_PORT}`);
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resolve();
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});
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});
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// TCP echo server
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tcpEchoServer = net.createServer((socket) => {
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socket.on('data', (data) => socket.write(data));
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});
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await new Promise<void>((resolve, reject) => {
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tcpEchoServer.on('error', reject);
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tcpEchoServer.listen(TCP_ECHO_PORT, () => {
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console.log(`TCP echo server on port ${TCP_ECHO_PORT}`);
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resolve();
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});
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});
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});
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// ===========================================================================
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// 2. Setup SmartProxy
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// ===========================================================================
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tap.test('setup - SmartProxy with 3 routes', async () => {
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proxy = new SmartProxy({
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routes: [
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// Plain HTTP forward: 47601 → 47600
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{
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name: 'http-forward',
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match: { ports: PROXY_HTTP_PORT },
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action: {
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type: 'forward',
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targets: [{ host: 'localhost', port: HTTP_ECHO_PORT }],
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},
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},
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// TLS-terminate HTTPS: 47602 → 47600
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{
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name: 'https-terminate',
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match: { ports: PROXY_HTTPS_PORT, domains: 'localhost' },
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action: {
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type: 'forward',
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targets: [{ host: 'localhost', port: HTTP_ECHO_PORT }],
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tls: {
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mode: 'terminate',
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certificate: {
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key: keyPem,
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cert: certPem,
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},
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},
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},
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},
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// Plain TCP forward: 47604 → 47603
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{
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name: 'tcp-forward',
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match: { ports: PROXY_TCP_PORT },
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action: {
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type: 'forward',
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targets: [{ host: 'localhost', port: TCP_ECHO_PORT }],
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},
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},
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],
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metrics: {
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enabled: true,
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sampleIntervalMs: 100,
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},
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enableDetailedLogging: false,
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});
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await proxy.start();
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// Give the proxy a moment to fully bind
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await new Promise((r) => setTimeout(r, 500));
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});
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// ===========================================================================
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// 3. HTTP/1.1 connection pooling: sequential requests reuse connections
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// ===========================================================================
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tap.test('HTTP/1.1 connection pooling: sequential requests reuse connections', async (tools) => {
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tools.timeout(30000);
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const metrics = proxy.getMetrics();
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const REQUEST_COUNT = 20;
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// Use a non-keepalive agent so each request closes the client→proxy socket
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// (Rust's backend connection pool still reuses proxy→backend connections)
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const agent = new http.Agent({ keepAlive: false });
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for (let i = 0; i < REQUEST_COUNT; i++) {
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const result = await httpRequest(
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{
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hostname: 'localhost',
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port: PROXY_HTTP_PORT,
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path: '/echo',
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method: 'POST',
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headers: { 'Content-Type': 'text/plain' },
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agent,
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},
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`msg-${i}`,
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);
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expect(result.status).toEqual(200);
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expect(result.body).toEqual(`echo:msg-${i}`);
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}
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agent.destroy();
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// Wait for all connections to settle and metrics to update
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await waitForMetrics(metrics, () => metrics.connections.active() === 0, 5000);
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expect(metrics.connections.active()).toEqual(0);
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// Bytes should have been transferred
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await waitForMetrics(metrics, () => metrics.totals.bytesIn() > 0);
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expect(metrics.totals.bytesIn()).toBeGreaterThan(0);
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expect(metrics.totals.bytesOut()).toBeGreaterThan(0);
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console.log(`HTTP pooling test: ${REQUEST_COUNT} requests completed. bytesIn=${metrics.totals.bytesIn()}, bytesOut=${metrics.totals.bytesOut()}`);
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});
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// ===========================================================================
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// 4. HTTPS with TLS termination: multiple requests through TLS
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// ===========================================================================
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tap.test('HTTPS with TLS termination: multiple requests through TLS', async (tools) => {
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tools.timeout(30000);
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const REQUEST_COUNT = 10;
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const agent = new https.Agent({ keepAlive: false, rejectUnauthorized: false });
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for (let i = 0; i < REQUEST_COUNT; i++) {
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const result = await httpsRequest(
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{
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hostname: 'localhost',
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port: PROXY_HTTPS_PORT,
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path: '/echo',
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method: 'POST',
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headers: { 'Content-Type': 'text/plain' },
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rejectUnauthorized: false,
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servername: 'localhost',
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agent,
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},
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`tls-${i}`,
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);
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expect(result.status).toEqual(200);
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expect(result.body).toEqual(`echo:tls-${i}`);
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}
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agent.destroy();
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console.log(`HTTPS termination test: ${REQUEST_COUNT} requests completed successfully`);
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});
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// ===========================================================================
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// 5. TLS ALPN negotiation verification
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// ===========================================================================
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tap.test('TLS ALPN negotiation: h2 advertised, h1.1 functional', async (tools) => {
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tools.timeout(15000);
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// Verify the Rust TLS layer advertises h2 via ALPN by inspecting a raw TLS socket
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const alpnProtocol = await new Promise<string>((resolve, reject) => {
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const socket = tls.connect(
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{
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host: 'localhost',
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port: PROXY_HTTPS_PORT,
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ALPNProtocols: ['h2', 'http/1.1'],
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rejectUnauthorized: false,
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servername: 'localhost',
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},
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() => {
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const proto = (socket as any).alpnProtocol || 'none';
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socket.destroy();
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resolve(proto);
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},
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);
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socket.on('error', reject);
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socket.setTimeout(5000, () => {
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socket.destroy(new Error('timeout'));
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});
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});
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console.log(`TLS ALPN negotiated protocol: ${alpnProtocol}`);
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// Rust advertises h2+http/1.1; the negotiated protocol should be one of them
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expect(['h2', 'http/1.1'].includes(alpnProtocol)).toBeTrue();
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// Now try an actual HTTP/2 session — Rust may or may not support h2 end-to-end
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let h2Supported = false;
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try {
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const session = http2.connect(`https://localhost:${PROXY_HTTPS_PORT}`, {
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rejectUnauthorized: false,
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});
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await new Promise<void>((resolve, reject) => {
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session.on('connect', () => resolve());
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session.on('error', reject);
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setTimeout(() => reject(new Error('h2 connect timeout')), 5000);
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});
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// If we get here, h2 session connected. Try a request.
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const result = await new Promise<{ status: number; body: string }>((resolve, reject) => {
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const reqStream = session.request({
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':method': 'POST',
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':path': '/echo',
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'content-type': 'text/plain',
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});
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let data = '';
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let status = 0;
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reqStream.on('response', (headers) => {
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status = headers[':status'] as number;
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});
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reqStream.on('data', (chunk: Buffer) => {
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data += chunk.toString();
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});
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reqStream.on('end', () => resolve({ status, body: data }));
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reqStream.on('error', reject);
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reqStream.end('h2-test');
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});
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expect(result.status).toEqual(200);
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expect(result.body).toEqual('echo:h2-test');
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h2Supported = true;
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await new Promise<void>((resolve) => session.close(() => resolve()));
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} catch {
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// h2 end-to-end not yet supported — that's OK, h1.1 over TLS is verified above
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console.log('HTTP/2 end-to-end not yet supported by Rust engine (expected)');
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}
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console.log(`HTTP/2 full support: ${h2Supported ? 'yes' : 'no (ALPN advertised but h2 framing not handled)'}`);
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});
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// ===========================================================================
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// 6. Connection stability: no leaked connections after repeated open/close
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// ===========================================================================
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tap.test('connection stability: no leaked connections after repeated open/close', async (tools) => {
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tools.timeout(60000);
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const metrics = proxy.getMetrics();
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const BATCH_SIZE = 50;
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// Ensure we start clean
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await waitForMetrics(metrics, () => metrics.connections.active() === 0);
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// Record total connections before
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await (proxy as any).metricsAdapter.poll();
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const totalBefore = metrics.connections.total();
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// --- Batch 1: 50 sequential TCP connections ---
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for (let i = 0; i < BATCH_SIZE; i++) {
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await new Promise<void>((resolve, reject) => {
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const client = new net.Socket();
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client.connect(PROXY_TCP_PORT, 'localhost', () => {
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const msg = `batch1-${i}`;
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client.write(msg);
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client.once('data', (data) => {
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expect(data.toString()).toEqual(msg);
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client.end();
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});
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});
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client.on('close', () => resolve());
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client.on('error', reject);
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client.setTimeout(5000, () => {
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client.destroy(new Error('timeout'));
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});
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});
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}
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// Wait for all connections to drain
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await waitForMetrics(metrics, () => metrics.connections.active() === 0, 5000);
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expect(metrics.connections.active()).toEqual(0);
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console.log(`Batch 1 done: active=${metrics.connections.active()}, total=${metrics.connections.total()}`);
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// --- Batch 2: another 50 ---
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for (let i = 0; i < BATCH_SIZE; i++) {
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await new Promise<void>((resolve, reject) => {
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const client = new net.Socket();
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client.connect(PROXY_TCP_PORT, 'localhost', () => {
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const msg = `batch2-${i}`;
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client.write(msg);
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client.once('data', (data) => {
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expect(data.toString()).toEqual(msg);
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client.end();
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});
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});
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client.on('close', () => resolve());
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client.on('error', reject);
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client.setTimeout(5000, () => {
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client.destroy(new Error('timeout'));
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});
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});
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}
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// Wait for all connections to drain again
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await waitForMetrics(metrics, () => metrics.connections.active() === 0, 5000);
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expect(metrics.connections.active()).toEqual(0);
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// Total should reflect ~100 new connections
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await (proxy as any).metricsAdapter.poll();
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const totalAfter = metrics.connections.total();
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const newConnections = totalAfter - totalBefore;
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console.log(`Batch 2 done: active=${metrics.connections.active()}, total=${totalAfter}, new=${newConnections}`);
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expect(newConnections).toBeGreaterThanOrEqual(BATCH_SIZE * 2);
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});
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// ===========================================================================
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// 7. Concurrent connections: burst and drain
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// ===========================================================================
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tap.test('concurrent connections: burst and drain', async (tools) => {
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tools.timeout(30000);
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const metrics = proxy.getMetrics();
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const CONCURRENT = 20;
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// Ensure we start clean
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await waitForMetrics(metrics, () => metrics.connections.active() === 0, 5000);
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// Open 20 TCP connections simultaneously
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const clients: net.Socket[] = [];
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const connectPromises: Promise<void>[] = [];
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for (let i = 0; i < CONCURRENT; i++) {
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const client = new net.Socket();
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clients.push(client);
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connectPromises.push(
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new Promise<void>((resolve, reject) => {
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client.connect(PROXY_TCP_PORT, 'localhost', () => resolve());
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client.on('error', reject);
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client.setTimeout(5000, () => {
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client.destroy(new Error('timeout'));
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});
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}),
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);
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}
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await Promise.all(connectPromises);
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// Send data on all connections and wait for echo
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const echoPromises = clients.map((client, i) => {
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return new Promise<void>((resolve, reject) => {
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const msg = `concurrent-${i}`;
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client.once('data', (data) => {
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expect(data.toString()).toEqual(msg);
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resolve();
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});
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client.write(msg);
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client.on('error', reject);
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});
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});
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await Promise.all(echoPromises);
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// Poll metrics — active connections should be CONCURRENT
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await waitForMetrics(metrics, () => metrics.connections.active() >= CONCURRENT, 3000);
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const activeWhileOpen = metrics.connections.active();
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console.log(`Burst: active connections while open = ${activeWhileOpen}`);
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expect(activeWhileOpen).toBeGreaterThanOrEqual(CONCURRENT);
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// Close all connections
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for (const client of clients) {
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client.end();
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}
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// Wait for drain
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await waitForMetrics(metrics, () => metrics.connections.active() === 0, 5000);
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expect(metrics.connections.active()).toEqual(0);
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console.log('Drain: all connections closed, active=0');
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});
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// ===========================================================================
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// 8. Cleanup
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// ===========================================================================
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tap.test('cleanup', async () => {
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await proxy.stop();
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await new Promise<void>((resolve) => {
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httpEchoServer.close(() => {
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console.log('HTTP echo server closed');
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resolve();
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});
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});
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await new Promise<void>((resolve) => {
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tcpEchoServer.close(() => {
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console.log('TCP echo server closed');
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resolve();
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});
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});
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});
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export default tap.start();
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