Implement proxy chain connection accumulation fix and add comprehensive tests
- Updated socket handling to prevent connection accumulation in chained proxies. - Introduced centralized bidirectional forwarding for consistent socket management. - Enhanced cleanup logic to ensure immediate closure of sockets when one closes. - Added tests to verify connection behavior under various scenarios, including backend failures and rapid reconnections.
This commit is contained in:
@ -582,4 +582,62 @@ onError: (error) => {
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- **Positive**: Prevents resource exhaustion from rapid reconnection attempts
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### Migration Notes
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No configuration changes needed. The fix is automatic and backward compatible.
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No configuration changes needed. The fix is automatic and backward compatible.
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## Proxy Chain Connection Accumulation Fix (v19.5.14+)
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### Issue
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When chaining SmartProxies (Client → SmartProxy1 → SmartProxy2 → Backend), connections would accumulate and never be cleaned up. This was particularly severe when the backend was down or closing connections immediately.
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### Root Cause
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The half-open connection support was preventing proper cascade cleanup in proxy chains:
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1. Backend closes → SmartProxy2's server socket closes
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2. SmartProxy2 keeps client socket open (half-open support)
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3. SmartProxy1 never gets notified that downstream is closed
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4. Connections accumulate at each proxy in the chain
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The issue was in `createIndependentSocketHandlers()` which waited for BOTH sockets to close before cleanup.
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### Solution
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1. **Changed default behavior**: When one socket closes, both close immediately
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2. **Made half-open support opt-in**: Only enabled when explicitly requested
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3. **Centralized socket handling**: Created `setupBidirectionalForwarding()` for consistent behavior
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4. **Applied everywhere**: Updated HttpProxyBridge and route-connection-handler to use centralized handling
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### Changes Made
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```typescript
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// socket-utils.ts - Default behavior now closes both sockets
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export function createIndependentSocketHandlers(
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clientSocket, serverSocket, onBothClosed,
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options: { enableHalfOpen?: boolean } = {} // Half-open is opt-in
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) {
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// When server closes, immediately close client (unless half-open enabled)
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if (!clientClosed && !options.enableHalfOpen) {
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clientSocket.destroy();
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}
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}
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// New centralized function for consistent socket pairing
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export function setupBidirectionalForwarding(
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clientSocket, serverSocket,
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handlers: {
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onClientData?: (chunk) => void;
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onServerData?: (chunk) => void;
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onCleanup: (reason) => void;
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enableHalfOpen?: boolean; // Default: false
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}
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)
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```
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### Test Coverage
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- `test/test.proxy-chain-simple.node.ts` - Verifies proxy chains don't accumulate connections
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- Tests confirm connections stay at 0 even with backend closing immediately
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- Works for any proxy chain configuration (not just localhost)
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### Performance Impact
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- **Positive**: No more connection accumulation in proxy chains
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- **Positive**: Immediate cleanup reduces memory usage
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- **Neutral**: Half-open connections still available when needed (opt-in)
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### Migration Notes
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No configuration changes needed. The fix applies to all proxy chains automatically.
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195
test/test.proxy-chain-simple.node.ts
Normal file
195
test/test.proxy-chain-simple.node.ts
Normal file
@ -0,0 +1,195 @@
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import { tap, expect } from '@git.zone/tstest/tapbundle';
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import * as net from 'net';
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import * as plugins from '../ts/plugins.js';
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// Import SmartProxy and configurations
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import { SmartProxy } from '../ts/index.js';
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tap.test('simple proxy chain test - identify connection accumulation', async () => {
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console.log('\n=== Simple Proxy Chain Test ===');
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console.log('Setup: Client → SmartProxy1 (8590) → SmartProxy2 (8591) → Backend (down)');
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// Create backend server that accepts and immediately closes connections
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const backend = net.createServer((socket) => {
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console.log('Backend: Connection received, closing immediately');
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socket.destroy();
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});
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await new Promise<void>((resolve) => {
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backend.listen(9998, () => {
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console.log('✓ Backend server started on port 9998 (closes connections immediately)');
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resolve();
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});
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});
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// Create SmartProxy2 (downstream)
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const proxy2 = new SmartProxy({
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ports: [8591],
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enableDetailedLogging: true,
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socketTimeout: 5000,
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routes: [{
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name: 'to-backend',
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match: { ports: 8591 },
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action: {
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type: 'forward',
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target: {
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host: 'localhost',
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port: 9998 // Backend that closes immediately
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}
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}
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}]
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});
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// Create SmartProxy1 (upstream)
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const proxy1 = new SmartProxy({
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ports: [8590],
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enableDetailedLogging: true,
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socketTimeout: 5000,
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routes: [{
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name: 'to-proxy2',
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match: { ports: 8590 },
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action: {
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type: 'forward',
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target: {
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host: 'localhost',
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port: 8591 // Forward to proxy2
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}
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}
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}]
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});
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await proxy2.start();
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console.log('✓ SmartProxy2 started on port 8591');
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await proxy1.start();
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console.log('✓ SmartProxy1 started on port 8590');
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// Helper to get connection counts
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const getConnectionCounts = () => {
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const conn1 = (proxy1 as any).connectionManager;
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const conn2 = (proxy2 as any).connectionManager;
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return {
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proxy1: conn1 ? conn1.getConnectionCount() : 0,
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proxy2: conn2 ? conn2.getConnectionCount() : 0
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};
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};
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console.log('\n--- Making 5 sequential connections ---');
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for (let i = 0; i < 5; i++) {
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console.log(`\n=== Connection ${i + 1} ===`);
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const counts = getConnectionCounts();
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console.log(`Before: Proxy1=${counts.proxy1}, Proxy2=${counts.proxy2}`);
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await new Promise<void>((resolve) => {
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const client = new net.Socket();
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let dataReceived = false;
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client.on('data', (data) => {
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console.log(`Client received data: ${data.toString()}`);
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dataReceived = true;
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});
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client.on('error', (err) => {
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console.log(`Client error: ${err.code}`);
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resolve();
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});
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client.on('close', () => {
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console.log(`Client closed (data received: ${dataReceived})`);
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resolve();
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});
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client.connect(8590, 'localhost', () => {
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console.log('Client connected to Proxy1');
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// Send HTTP request
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client.write('GET / HTTP/1.1\r\nHost: test.com\r\n\r\n');
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});
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// Timeout
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setTimeout(() => {
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if (!client.destroyed) {
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console.log('Client timeout, destroying');
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client.destroy();
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}
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resolve();
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}, 2000);
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});
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// Wait a bit and check counts
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await new Promise(resolve => setTimeout(resolve, 500));
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const afterCounts = getConnectionCounts();
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console.log(`After: Proxy1=${afterCounts.proxy1}, Proxy2=${afterCounts.proxy2}`);
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if (afterCounts.proxy1 > 0 || afterCounts.proxy2 > 0) {
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console.log('⚠️ WARNING: Connections not cleaned up!');
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}
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}
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console.log('\n--- Test with backend completely down ---');
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// Stop backend
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backend.close();
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await new Promise(resolve => setTimeout(resolve, 100));
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console.log('✓ Backend stopped');
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// Make more connections with backend down
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for (let i = 0; i < 3; i++) {
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console.log(`\n=== Connection ${i + 6} (backend down) ===`);
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const counts = getConnectionCounts();
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console.log(`Before: Proxy1=${counts.proxy1}, Proxy2=${counts.proxy2}`);
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await new Promise<void>((resolve) => {
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const client = new net.Socket();
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client.on('error', () => {
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resolve();
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});
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client.on('close', () => {
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resolve();
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});
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client.connect(8590, 'localhost', () => {
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client.write('GET / HTTP/1.1\r\nHost: test.com\r\n\r\n');
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});
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setTimeout(() => {
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if (!client.destroyed) {
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client.destroy();
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}
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resolve();
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}, 1000);
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});
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await new Promise(resolve => setTimeout(resolve, 500));
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const afterCounts = getConnectionCounts();
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console.log(`After: Proxy1=${afterCounts.proxy1}, Proxy2=${afterCounts.proxy2}`);
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}
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// Final check
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console.log('\n--- Final Check ---');
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await new Promise(resolve => setTimeout(resolve, 1000));
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const finalCounts = getConnectionCounts();
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console.log(`Final counts: Proxy1=${finalCounts.proxy1}, Proxy2=${finalCounts.proxy2}`);
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await proxy1.stop();
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await proxy2.stop();
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// Verify
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if (finalCounts.proxy1 > 0 || finalCounts.proxy2 > 0) {
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console.log('\n❌ FAIL: Connections accumulated!');
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} else {
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console.log('\n✅ PASS: No connection accumulation');
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}
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expect(finalCounts.proxy1).toEqual(0);
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expect(finalCounts.proxy2).toEqual(0);
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});
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tap.start();
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368
test/test.proxy-chaining-accumulation.node.ts
Normal file
368
test/test.proxy-chaining-accumulation.node.ts
Normal file
@ -0,0 +1,368 @@
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import { tap, expect } from '@git.zone/tstest/tapbundle';
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import * as net from 'net';
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import * as plugins from '../ts/plugins.js';
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// Import SmartProxy and configurations
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import { SmartProxy } from '../ts/index.js';
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tap.test('should handle proxy chaining without connection accumulation', async () => {
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console.log('\n=== Testing Proxy Chaining Connection Accumulation ===');
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console.log('Setup: Client → SmartProxy1 → SmartProxy2 → Backend (down)');
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// Create SmartProxy2 (downstream proxy)
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const proxy2 = new SmartProxy({
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ports: [8581],
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enableDetailedLogging: false,
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socketTimeout: 5000,
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routes: [{
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name: 'backend-route',
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match: { ports: 8581 },
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action: {
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type: 'forward',
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target: {
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host: 'localhost',
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port: 9999 // Non-existent backend
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}
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}
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}]
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});
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// Create SmartProxy1 (upstream proxy)
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const proxy1 = new SmartProxy({
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ports: [8580],
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enableDetailedLogging: false,
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socketTimeout: 5000,
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routes: [{
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name: 'chain-route',
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match: { ports: 8580 },
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action: {
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type: 'forward',
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target: {
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host: 'localhost',
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port: 8581 // Forward to proxy2
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}
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}
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}]
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});
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// Start both proxies
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await proxy2.start();
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console.log('✓ SmartProxy2 started on port 8581');
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await proxy1.start();
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console.log('✓ SmartProxy1 started on port 8580');
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// Helper to get connection counts
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const getConnectionCounts = () => {
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const conn1 = (proxy1 as any).connectionManager;
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const conn2 = (proxy2 as any).connectionManager;
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return {
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proxy1: conn1 ? conn1.getConnectionCount() : 0,
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proxy2: conn2 ? conn2.getConnectionCount() : 0
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};
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};
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const initialCounts = getConnectionCounts();
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console.log(`\nInitial connection counts - Proxy1: ${initialCounts.proxy1}, Proxy2: ${initialCounts.proxy2}`);
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// Test 1: Single connection attempt
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console.log('\n--- Test 1: Single connection through chain ---');
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await new Promise<void>((resolve) => {
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const client = new net.Socket();
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client.on('error', (err) => {
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console.log(`Client received error: ${err.code}`);
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resolve();
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});
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client.on('close', () => {
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console.log('Client connection closed');
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resolve();
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});
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client.connect(8580, 'localhost', () => {
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console.log('Client connected to Proxy1');
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// Send data to trigger routing
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client.write('GET / HTTP/1.1\r\nHost: test.com\r\n\r\n');
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});
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// Timeout
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setTimeout(() => {
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if (!client.destroyed) {
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client.destroy();
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}
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resolve();
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}, 1000);
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});
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// Check connections after single attempt
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await new Promise(resolve => setTimeout(resolve, 500));
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let counts = getConnectionCounts();
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console.log(`After single connection - Proxy1: ${counts.proxy1}, Proxy2: ${counts.proxy2}`);
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// Test 2: Multiple simultaneous connections
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console.log('\n--- Test 2: Multiple simultaneous connections ---');
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const promises = [];
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for (let i = 0; i < 10; i++) {
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promises.push(new Promise<void>((resolve) => {
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const client = new net.Socket();
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client.on('error', () => {
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resolve();
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});
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client.on('close', () => {
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resolve();
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});
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client.connect(8580, 'localhost', () => {
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// Send data
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client.write(`GET /test${i} HTTP/1.1\r\nHost: test.com\r\n\r\n`);
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});
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// Timeout
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setTimeout(() => {
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if (!client.destroyed) {
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client.destroy();
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}
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resolve();
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}, 500);
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}));
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}
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await Promise.all(promises);
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console.log('✓ All simultaneous connections completed');
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// Check connections
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counts = getConnectionCounts();
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console.log(`After simultaneous connections - Proxy1: ${counts.proxy1}, Proxy2: ${counts.proxy2}`);
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// Test 3: Rapid serial connections (simulating retries)
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console.log('\n--- Test 3: Rapid serial connections (retries) ---');
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for (let i = 0; i < 20; i++) {
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await new Promise<void>((resolve) => {
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const client = new net.Socket();
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client.on('error', () => {
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resolve();
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});
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client.on('close', () => {
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resolve();
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});
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client.connect(8580, 'localhost', () => {
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client.write('GET / HTTP/1.1\r\nHost: test.com\r\n\r\n');
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// Quick disconnect to simulate retry behavior
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setTimeout(() => client.destroy(), 50);
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});
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// Timeout
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setTimeout(() => {
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if (!client.destroyed) {
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client.destroy();
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}
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resolve();
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}, 200);
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});
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if ((i + 1) % 5 === 0) {
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counts = getConnectionCounts();
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console.log(`After ${i + 1} retries - Proxy1: ${counts.proxy1}, Proxy2: ${counts.proxy2}`);
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}
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// Small delay between retries
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await new Promise(resolve => setTimeout(resolve, 50));
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}
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// Test 4: Long-lived connection attempt
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console.log('\n--- Test 4: Long-lived connection attempt ---');
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await new Promise<void>((resolve) => {
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const client = new net.Socket();
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client.on('error', () => {
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resolve();
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});
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client.on('close', () => {
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console.log('Long-lived client closed');
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resolve();
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});
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client.connect(8580, 'localhost', () => {
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console.log('Long-lived client connected');
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// Send data periodically
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const interval = setInterval(() => {
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if (!client.destroyed && client.writable) {
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client.write('PING\r\n');
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} else {
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clearInterval(interval);
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}
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}, 100);
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// Close after 2 seconds
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setTimeout(() => {
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clearInterval(interval);
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client.destroy();
|
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}, 2000);
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});
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// Timeout
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setTimeout(() => {
|
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if (!client.destroyed) {
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client.destroy();
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||||
}
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resolve();
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}, 3000);
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||||
});
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||||
// Final check
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||||
await new Promise(resolve => setTimeout(resolve, 1000));
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|
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const finalCounts = getConnectionCounts();
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console.log(`\nFinal connection counts - Proxy1: ${finalCounts.proxy1}, Proxy2: ${finalCounts.proxy2}`);
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||||
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||||
// Monitor for a bit to see if connections are cleaned up
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console.log('\nMonitoring connection cleanup...');
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||||
for (let i = 0; i < 3; i++) {
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await new Promise(resolve => setTimeout(resolve, 500));
|
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counts = getConnectionCounts();
|
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console.log(`After ${(i + 1) * 0.5}s - Proxy1: ${counts.proxy1}, Proxy2: ${counts.proxy2}`);
|
||||
}
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||||
|
||||
// Stop proxies
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await proxy1.stop();
|
||||
console.log('\n✓ SmartProxy1 stopped');
|
||||
|
||||
await proxy2.stop();
|
||||
console.log('✓ SmartProxy2 stopped');
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||||
|
||||
// Analysis
|
||||
console.log('\n=== Analysis ===');
|
||||
if (finalCounts.proxy1 > 0 || finalCounts.proxy2 > 0) {
|
||||
console.log('❌ FAIL: Connections accumulated!');
|
||||
console.log(`Proxy1 leaked ${finalCounts.proxy1} connections`);
|
||||
console.log(`Proxy2 leaked ${finalCounts.proxy2} connections`);
|
||||
} else {
|
||||
console.log('✅ PASS: No connection accumulation detected');
|
||||
}
|
||||
|
||||
// Verify
|
||||
expect(finalCounts.proxy1).toEqual(0);
|
||||
expect(finalCounts.proxy2).toEqual(0);
|
||||
});
|
||||
|
||||
tap.test('should handle proxy chain with HTTP traffic', async () => {
|
||||
console.log('\n=== Testing Proxy Chain with HTTP Traffic ===');
|
||||
|
||||
// Create SmartProxy2 with HTTP handling
|
||||
const proxy2 = new SmartProxy({
|
||||
ports: [8583],
|
||||
useHttpProxy: [8583], // Enable HTTP proxy handling
|
||||
httpProxyPort: 8584,
|
||||
enableDetailedLogging: false,
|
||||
routes: [{
|
||||
name: 'http-backend',
|
||||
match: { ports: 8583 },
|
||||
action: {
|
||||
type: 'forward',
|
||||
target: {
|
||||
host: 'localhost',
|
||||
port: 9999 // Non-existent backend
|
||||
}
|
||||
}
|
||||
}]
|
||||
});
|
||||
|
||||
// Create SmartProxy1 with HTTP handling
|
||||
const proxy1 = new SmartProxy({
|
||||
ports: [8582],
|
||||
useHttpProxy: [8582], // Enable HTTP proxy handling
|
||||
httpProxyPort: 8585,
|
||||
enableDetailedLogging: false,
|
||||
routes: [{
|
||||
name: 'http-chain',
|
||||
match: { ports: 8582 },
|
||||
action: {
|
||||
type: 'forward',
|
||||
target: {
|
||||
host: 'localhost',
|
||||
port: 8583 // Forward to proxy2
|
||||
}
|
||||
}
|
||||
}]
|
||||
});
|
||||
|
||||
await proxy2.start();
|
||||
console.log('✓ SmartProxy2 (HTTP) started on port 8583');
|
||||
|
||||
await proxy1.start();
|
||||
console.log('✓ SmartProxy1 (HTTP) started on port 8582');
|
||||
|
||||
// Helper to get connection counts
|
||||
const getConnectionCounts = () => {
|
||||
const conn1 = (proxy1 as any).connectionManager;
|
||||
const conn2 = (proxy2 as any).connectionManager;
|
||||
return {
|
||||
proxy1: conn1 ? conn1.getConnectionCount() : 0,
|
||||
proxy2: conn2 ? conn2.getConnectionCount() : 0
|
||||
};
|
||||
};
|
||||
|
||||
console.log('\nSending HTTP requests through chain...');
|
||||
|
||||
// Make HTTP requests
|
||||
for (let i = 0; i < 5; i++) {
|
||||
await new Promise<void>((resolve) => {
|
||||
const client = new net.Socket();
|
||||
let responseData = '';
|
||||
|
||||
client.on('data', (data) => {
|
||||
responseData += data.toString();
|
||||
// Check if we got a complete HTTP response
|
||||
if (responseData.includes('\r\n\r\n')) {
|
||||
console.log(`Response ${i + 1}: ${responseData.split('\r\n')[0]}`);
|
||||
client.destroy();
|
||||
}
|
||||
});
|
||||
|
||||
client.on('error', () => {
|
||||
resolve();
|
||||
});
|
||||
|
||||
client.on('close', () => {
|
||||
resolve();
|
||||
});
|
||||
|
||||
client.connect(8582, 'localhost', () => {
|
||||
client.write(`GET /test${i} HTTP/1.1\r\nHost: test.com\r\nConnection: close\r\n\r\n`);
|
||||
});
|
||||
|
||||
setTimeout(() => {
|
||||
if (!client.destroyed) {
|
||||
client.destroy();
|
||||
}
|
||||
resolve();
|
||||
}, 1000);
|
||||
});
|
||||
|
||||
await new Promise(resolve => setTimeout(resolve, 100));
|
||||
}
|
||||
|
||||
await new Promise(resolve => setTimeout(resolve, 1000));
|
||||
|
||||
const finalCounts = getConnectionCounts();
|
||||
console.log(`\nFinal HTTP proxy counts - Proxy1: ${finalCounts.proxy1}, Proxy2: ${finalCounts.proxy2}`);
|
||||
|
||||
await proxy1.stop();
|
||||
await proxy2.stop();
|
||||
|
||||
expect(finalCounts.proxy1).toEqual(0);
|
||||
expect(finalCounts.proxy2).toEqual(0);
|
||||
});
|
||||
|
||||
tap.start();
|
||||
@ -109,7 +109,8 @@ export function createSocketCleanupHandler(
|
||||
export function createIndependentSocketHandlers(
|
||||
clientSocket: plugins.net.Socket | plugins.tls.TLSSocket,
|
||||
serverSocket: plugins.net.Socket | plugins.tls.TLSSocket,
|
||||
onBothClosed: (reason: string) => void
|
||||
onBothClosed: (reason: string) => void,
|
||||
options: { enableHalfOpen?: boolean } = {}
|
||||
): { cleanupClient: (reason: string) => Promise<void>, cleanupServer: (reason: string) => Promise<void> } {
|
||||
let clientClosed = false;
|
||||
let serverClosed = false;
|
||||
@ -127,8 +128,13 @@ export function createIndependentSocketHandlers(
|
||||
clientClosed = true;
|
||||
clientReason = reason;
|
||||
|
||||
// Allow server to continue if still active
|
||||
if (!serverClosed && serverSocket.writable) {
|
||||
// Default behavior: close both sockets when one closes (required for proxy chains)
|
||||
if (!serverClosed && !options.enableHalfOpen) {
|
||||
serverSocket.destroy();
|
||||
}
|
||||
|
||||
// Half-open support (opt-in only)
|
||||
if (!serverClosed && serverSocket.writable && options.enableHalfOpen) {
|
||||
// Half-close: stop reading from client, let server finish
|
||||
clientSocket.pause();
|
||||
clientSocket.unpipe(serverSocket);
|
||||
@ -145,8 +151,13 @@ export function createIndependentSocketHandlers(
|
||||
serverClosed = true;
|
||||
serverReason = reason;
|
||||
|
||||
// Allow client to continue if still active
|
||||
if (!clientClosed && clientSocket.writable) {
|
||||
// Default behavior: close both sockets when one closes (required for proxy chains)
|
||||
if (!clientClosed && !options.enableHalfOpen) {
|
||||
clientSocket.destroy();
|
||||
}
|
||||
|
||||
// Half-open support (opt-in only)
|
||||
if (!clientClosed && clientSocket.writable && options.enableHalfOpen) {
|
||||
// Half-close: stop reading from server, let client finish
|
||||
serverSocket.pause();
|
||||
serverSocket.unpipe(clientSocket);
|
||||
@ -194,6 +205,79 @@ export function setupSocketHandlers(
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Setup bidirectional data forwarding between two sockets with proper cleanup
|
||||
* @param clientSocket The client/incoming socket
|
||||
* @param serverSocket The server/outgoing socket
|
||||
* @param handlers Object containing optional handlers for data and cleanup
|
||||
* @returns Cleanup functions for both sockets
|
||||
*/
|
||||
export function setupBidirectionalForwarding(
|
||||
clientSocket: plugins.net.Socket | plugins.tls.TLSSocket,
|
||||
serverSocket: plugins.net.Socket | plugins.tls.TLSSocket,
|
||||
handlers: {
|
||||
onClientData?: (chunk: Buffer) => void;
|
||||
onServerData?: (chunk: Buffer) => void;
|
||||
onCleanup: (reason: string) => void;
|
||||
enableHalfOpen?: boolean;
|
||||
}
|
||||
): { cleanupClient: (reason: string) => Promise<void>, cleanupServer: (reason: string) => Promise<void> } {
|
||||
// Set up cleanup handlers
|
||||
const { cleanupClient, cleanupServer } = createIndependentSocketHandlers(
|
||||
clientSocket,
|
||||
serverSocket,
|
||||
handlers.onCleanup,
|
||||
{ enableHalfOpen: handlers.enableHalfOpen }
|
||||
);
|
||||
|
||||
// Set up error and close handlers
|
||||
setupSocketHandlers(clientSocket, cleanupClient, undefined, 'client');
|
||||
setupSocketHandlers(serverSocket, cleanupServer, undefined, 'server');
|
||||
|
||||
// Set up data forwarding with backpressure handling
|
||||
clientSocket.on('data', (chunk: Buffer) => {
|
||||
if (handlers.onClientData) {
|
||||
handlers.onClientData(chunk);
|
||||
}
|
||||
|
||||
if (serverSocket.writable) {
|
||||
const flushed = serverSocket.write(chunk);
|
||||
|
||||
// Handle backpressure
|
||||
if (!flushed) {
|
||||
clientSocket.pause();
|
||||
serverSocket.once('drain', () => {
|
||||
if (!clientSocket.destroyed) {
|
||||
clientSocket.resume();
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
serverSocket.on('data', (chunk: Buffer) => {
|
||||
if (handlers.onServerData) {
|
||||
handlers.onServerData(chunk);
|
||||
}
|
||||
|
||||
if (clientSocket.writable) {
|
||||
const flushed = clientSocket.write(chunk);
|
||||
|
||||
// Handle backpressure
|
||||
if (!flushed) {
|
||||
serverSocket.pause();
|
||||
clientSocket.once('drain', () => {
|
||||
if (!serverSocket.destroyed) {
|
||||
serverSocket.resume();
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
return { cleanupClient, cleanupServer };
|
||||
}
|
||||
|
||||
/**
|
||||
* Pipe two sockets together with proper cleanup on either end
|
||||
* @param socket1 First socket
|
||||
|
||||
@ -1,5 +1,6 @@
|
||||
import * as plugins from '../../plugins.js';
|
||||
import { HttpProxy } from '../http-proxy/index.js';
|
||||
import { setupBidirectionalForwarding } from '../../core/utils/socket-utils.js';
|
||||
import type { IConnectionRecord, ISmartProxyOptions } from './models/interfaces.js';
|
||||
import type { IRouteConfig } from './models/route-types.js';
|
||||
|
||||
@ -123,36 +124,25 @@ export class HttpProxyBridge {
|
||||
proxySocket.write(initialChunk);
|
||||
}
|
||||
|
||||
// Pipe the sockets together
|
||||
socket.pipe(proxySocket);
|
||||
proxySocket.pipe(socket);
|
||||
|
||||
// Handle cleanup
|
||||
let cleanedUp = false;
|
||||
const cleanup = (reason: string) => {
|
||||
if (cleanedUp) return;
|
||||
cleanedUp = true;
|
||||
|
||||
// Remove all event listeners to prevent memory leaks
|
||||
socket.removeAllListeners('end');
|
||||
socket.removeAllListeners('error');
|
||||
proxySocket.removeAllListeners('end');
|
||||
proxySocket.removeAllListeners('error');
|
||||
|
||||
socket.unpipe(proxySocket);
|
||||
proxySocket.unpipe(socket);
|
||||
|
||||
if (!proxySocket.destroyed) {
|
||||
proxySocket.destroy();
|
||||
}
|
||||
|
||||
cleanupCallback(reason);
|
||||
};
|
||||
|
||||
socket.on('end', () => cleanup('socket_end'));
|
||||
socket.on('error', () => cleanup('socket_error'));
|
||||
proxySocket.on('end', () => cleanup('proxy_end'));
|
||||
proxySocket.on('error', () => cleanup('proxy_error'));
|
||||
// Use centralized bidirectional forwarding
|
||||
setupBidirectionalForwarding(socket, proxySocket, {
|
||||
onClientData: (chunk) => {
|
||||
// Update stats if needed
|
||||
if (record) {
|
||||
record.bytesReceived += chunk.length;
|
||||
}
|
||||
},
|
||||
onServerData: (chunk) => {
|
||||
// Update stats if needed
|
||||
if (record) {
|
||||
record.bytesSent += chunk.length;
|
||||
}
|
||||
},
|
||||
onCleanup: (reason) => {
|
||||
cleanupCallback(reason);
|
||||
},
|
||||
enableHalfOpen: false // Close both when one closes (required for proxy chains)
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
|
||||
@ -9,7 +9,7 @@ import { TlsManager } from './tls-manager.js';
|
||||
import { HttpProxyBridge } from './http-proxy-bridge.js';
|
||||
import { TimeoutManager } from './timeout-manager.js';
|
||||
import { RouteManager } from './route-manager.js';
|
||||
import { cleanupSocket, createIndependentSocketHandlers, setupSocketHandlers, createSocketWithErrorHandler } from '../../core/utils/socket-utils.js';
|
||||
import { cleanupSocket, createIndependentSocketHandlers, setupSocketHandlers, createSocketWithErrorHandler, setupBidirectionalForwarding } from '../../core/utils/socket-utils.js';
|
||||
|
||||
/**
|
||||
* Handles new connection processing and setup logic with support for route-based configuration
|
||||
@ -1137,65 +1137,27 @@ export class RouteConnectionHandler {
|
||||
record.pendingDataSize = 0;
|
||||
}
|
||||
|
||||
// Set up independent socket handlers for half-open connection support
|
||||
const { cleanupClient, cleanupServer } = createIndependentSocketHandlers(
|
||||
socket,
|
||||
targetSocket,
|
||||
(reason) => {
|
||||
// Use centralized bidirectional forwarding setup
|
||||
setupBidirectionalForwarding(socket, targetSocket, {
|
||||
onClientData: (chunk) => {
|
||||
record.bytesReceived += chunk.length;
|
||||
this.timeoutManager.updateActivity(record);
|
||||
},
|
||||
onServerData: (chunk) => {
|
||||
record.bytesSent += chunk.length;
|
||||
this.timeoutManager.updateActivity(record);
|
||||
},
|
||||
onCleanup: (reason) => {
|
||||
this.connectionManager.cleanupConnection(record, reason);
|
||||
}
|
||||
);
|
||||
|
||||
// Setup socket handlers with custom timeout handling
|
||||
setupSocketHandlers(socket, cleanupClient, (sock) => {
|
||||
// Don't close on timeout for keep-alive connections
|
||||
if (record.hasKeepAlive) {
|
||||
sock.setTimeout(this.settings.socketTimeout || 3600000);
|
||||
}
|
||||
}, 'client');
|
||||
|
||||
setupSocketHandlers(targetSocket, cleanupServer, (sock) => {
|
||||
// Don't close on timeout for keep-alive connections
|
||||
if (record.hasKeepAlive) {
|
||||
sock.setTimeout(this.settings.socketTimeout || 3600000);
|
||||
}
|
||||
}, 'server');
|
||||
|
||||
// Forward data from client to target with backpressure handling
|
||||
socket.on('data', (chunk: Buffer) => {
|
||||
record.bytesReceived += chunk.length;
|
||||
this.timeoutManager.updateActivity(record);
|
||||
|
||||
if (targetSocket.writable) {
|
||||
const flushed = targetSocket.write(chunk);
|
||||
|
||||
// Handle backpressure
|
||||
if (!flushed) {
|
||||
socket.pause();
|
||||
targetSocket.once('drain', () => {
|
||||
socket.resume();
|
||||
});
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
// Forward data from target to client with backpressure handling
|
||||
targetSocket.on('data', (chunk: Buffer) => {
|
||||
record.bytesSent += chunk.length;
|
||||
this.timeoutManager.updateActivity(record);
|
||||
|
||||
if (socket.writable) {
|
||||
const flushed = socket.write(chunk);
|
||||
|
||||
// Handle backpressure
|
||||
if (!flushed) {
|
||||
targetSocket.pause();
|
||||
socket.once('drain', () => {
|
||||
targetSocket.resume();
|
||||
});
|
||||
}
|
||||
}
|
||||
},
|
||||
enableHalfOpen: false // Default: close both when one closes (required for proxy chains)
|
||||
});
|
||||
|
||||
// Apply timeouts if keep-alive is enabled
|
||||
if (record.hasKeepAlive) {
|
||||
socket.setTimeout(this.settings.socketTimeout || 3600000);
|
||||
targetSocket.setTimeout(this.settings.socketTimeout || 3600000);
|
||||
}
|
||||
|
||||
// Log successful connection
|
||||
logger.log('info',
|
||||
@ -1354,11 +1316,5 @@ export class RouteConnectionHandler {
|
||||
|
||||
// Apply socket timeouts
|
||||
this.timeoutManager.applySocketTimeouts(record);
|
||||
|
||||
// Track outgoing data for bytes counting (moved from the duplicate connect handler)
|
||||
targetSocket.on('data', (chunk: Buffer) => {
|
||||
record.bytesSent += chunk.length;
|
||||
this.timeoutManager.updateActivity(record);
|
||||
});
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user