feat(core): Add backendProtocol option to support HTTP/2 client sessions alongside HTTP/1. This update enhances NetworkProxy's core functionality by integrating HTTP/2 support in server creation and request handling, while updating plugin exports and documentation accordingly.

changelog.md

@@ -1,5 +1,14 @@
 # Changelog
 
+## 2025-04-19 - 7.1.0 - feat(core)
+Add backendProtocol option to support HTTP/2 client sessions alongside HTTP/1. This update enhances NetworkProxy's core functionality by integrating HTTP/2 support in server creation and request handling, while updating plugin exports and documentation accordingly.
+
+- Introduced 'backendProtocol' configuration option (http1 | http2) with default 'http1'.
+- Updated creation of secure server to use http2.createSecureServer with HTTP/1 fallback.
+- Enhanced request handling to establish HTTP/2 client sessions when backendProtocol is set to 'http2'.
+- Exported http2 module in plugins.
+- Updated readme.md to document backendProtocol usage with example code.
+
 ## 2025-04-05 - 7.0.1 - fix(package.json)
 Update packageManager field in package.json to specify the pnpm version for improved reproducibility.
 

readme.md

@@ -198,6 +198,26 @@ sequenceDiagram
 - **Let's Encrypt Integration** - Automatic certificate management using ACME protocol
 - **IP Filtering** - Control access with IP allow/block lists using glob patterns
  - **NfTables Integration** - Direct manipulation of nftables for advanced low-level port forwarding
+
+## Configuration Options
+
+### backendProtocol
+
+Type: 'http1' | 'http2' (default: 'http1')
+
+Controls the protocol used when proxying requests to backend services. By default, the proxy uses HTTP/1.x (`http.request`). Setting `backendProtocol: 'http2'` establishes HTTP/2 client sessions (`http2.connect`) to your backends for full end-to-end HTTP/2 support (assuming your backend servers support HTTP/2).
+
+Example:
+```js
+import { NetworkProxy } from '@push.rocks/smartproxy';
+
+const proxy = new NetworkProxy({
+  port: 8443,
+  backendProtocol: 'http2',
+  // other options...
+});
+proxy.start();
+```
 - **Basic Authentication** - Support for basic auth on proxied routes
 - **Connection Management** - Intelligent connection tracking and cleanup with configurable timeouts
 - **Browser Compatibility** - Optimized for modern browsers with fixes for common TLS handshake issues

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartproxy',
-  version: '7.0.1',
+  version: '7.1.0',
   description: 'A powerful proxy package that effectively handles high traffic, with features such as SSL/TLS support, port proxying, WebSocket handling, dynamic routing with authentication options, and automatic ACME certificate management.'
 }

ts/networkproxy/classes.np.networkproxy.ts

@@ -16,8 +16,8 @@ export class NetworkProxy implements IMetricsTracker {
   public options: INetworkProxyOptions;
   public proxyConfigs: IReverseProxyConfig[] = [];
   
-  // Server instances
+  // Server instances (HTTP/2 with HTTP/1 fallback)
-  public httpsServer: plugins.https.Server;
+  public httpsServer: any;
   
   // Core components
   private certificateManager: CertificateManager;
@@ -66,6 +66,8 @@ export class NetworkProxy implements IMetricsTracker {
       connectionPoolSize: optionsArg.connectionPoolSize || 50,
       portProxyIntegration: optionsArg.portProxyIntegration || false,
       useExternalPort80Handler: optionsArg.useExternalPort80Handler || false,
+      // Backend protocol (http1 or http2)
+      backendProtocol: optionsArg.backendProtocol || 'http1',
       // Default ACME options
       acme: {
         enabled: optionsArg.acme?.enabled || false,
@@ -185,33 +187,35 @@ export class NetworkProxy implements IMetricsTracker {
       await this.certificateManager.initializePort80Handler();
     }
     
-    // Create the HTTPS server
+    // Create HTTP/2 server with HTTP/1 fallback
-    this.httpsServer = plugins.https.createServer(
+    this.httpsServer = plugins.http2.createSecureServer(
       {
         key: this.certificateManager.getDefaultCertificates().key,
         cert: this.certificateManager.getDefaultCertificates().cert,
-        SNICallback: (domain, cb) => this.certificateManager.handleSNI(domain, cb)
+        allowHTTP1: true,
-      },
+        ALPNProtocols: ['h2', 'http/1.1']
-      (req, res) => this.requestHandler.handleRequest(req, res)
+      }
     );
 
-    // Configure server timeouts
+    // Track raw TCP connections for metrics and limits
-    this.httpsServer.keepAliveTimeout = this.options.keepAliveTimeout;
-    this.httpsServer.headersTimeout = this.options.headersTimeout;
-    
-    // Setup connection tracking
     this.setupConnectionTracking();
 
-    // Share HTTPS server with certificate manager
+    // Handle incoming HTTP/2 streams
+    this.httpsServer.on('stream', (stream: any, headers: any) => {
+      this.requestHandler.handleHttp2(stream, headers);
+    });
+    // Handle HTTP/1.x fallback requests
+    this.httpsServer.on('request', (req: any, res: any) => {
+      this.requestHandler.handleRequest(req, res);
+    });
+
+    // Share server with certificate manager for dynamic contexts
     this.certificateManager.setHttpsServer(this.httpsServer);
-    
+    // Setup WebSocket support on HTTP/1 fallback
-    // Setup WebSocket support
     this.webSocketHandler.initialize(this.httpsServer);
-    
+    // Start metrics logging
-    // Start metrics collection
     this.setupMetricsCollection();
-    
+    // Start periodic connection pool cleanup
-    // Setup connection pool cleanup interval
     this.connectionPoolCleanupInterval = this.connectionPool.setupPeriodicCleanup();
 
     // Start the server

ts/networkproxy/classes.np.requesthandler.ts

@@ -18,6 +18,8 @@ export class RequestHandler {
   private defaultHeaders: { [key: string]: string } = {};
   private logger: ILogger;
   private metricsTracker: IMetricsTracker | null = null;
+  // HTTP/2 client sessions for backend proxying
+  private h2Sessions: Map<string, plugins.http2.ClientHttp2Session> = new Map();
   
   constructor(
     private options: INetworkProxyOptions,
@@ -130,6 +132,70 @@ export class RequestHandler {
     
     // Apply default headers
     this.applyDefaultHeaders(res);
+    // If configured to proxy to backends over HTTP/2, use HTTP/2 client sessions
+    if (this.options.backendProtocol === 'http2') {
+      // Route and validate config
+      const proxyConfig = this.router.routeReq(req);
+      if (!proxyConfig) {
+        this.logger.warn(`No proxy configuration for host: ${req.headers.host}`);
+        res.statusCode = 404;
+        res.end('Not Found: No proxy configuration for this host');
+        if (this.metricsTracker) this.metricsTracker.incrementFailedRequests();
+        return;
+      }
+      // Determine backend target
+      const destination = this.connectionPool.getNextTarget(
+        proxyConfig.destinationIps,
+        proxyConfig.destinationPorts[0]
+      );
+      // Obtain or create HTTP/2 session
+      const key = `${destination.host}:${destination.port}`;
+      let session = this.h2Sessions.get(key);
+      if (!session || session.closed || (session as any).destroyed) {
+        session = plugins.http2.connect(`http://${destination.host}:${destination.port}`);
+        this.h2Sessions.set(key, session);
+        session.on('error', () => this.h2Sessions.delete(key));
+        session.on('close', () => this.h2Sessions.delete(key));
+      }
+      // Build headers for HTTP/2 request
+      const h2Headers: Record<string, string> = {
+        ':method': req.method || 'GET',
+        ':path': req.url || '/',
+        ':authority': `${destination.host}:${destination.port}`
+      };
+      for (const [k, v] of Object.entries(req.headers)) {
+        if (typeof v === 'string' && !k.startsWith(':')) {
+          h2Headers[k] = v;
+        }
+      }
+      // Open HTTP/2 stream
+      const h2Stream = session.request(h2Headers);
+      // Pipe client request body to backend
+      req.pipe(h2Stream);
+      // Handle backend response
+      h2Stream.on('response', (headers, flags) => {
+        const status = headers[':status'] as number || 502;
+        // Map headers
+        for (const [hk, hv] of Object.entries(headers)) {
+          if (!hk.startsWith(':') && hv) {
+            res.setHeader(hk, hv as string);
+          }
+        }
+        res.statusCode = status;
+        h2Stream.pipe(res);
+      });
+      h2Stream.on('error', (err) => {
+        this.logger.error(`HTTP/2 proxy error: ${err.message}`);
+        if (!res.headersSent) {
+          res.statusCode = 502;
+          res.end(`Bad Gateway: ${err.message}`);
+        } else {
+          res.end();
+        }
+        if (this.metricsTracker) this.metricsTracker.incrementFailedRequests();
+      });
+      return;
+    }
     
     try {
       // Find target based on hostname
@@ -275,4 +341,119 @@ export class RequestHandler {
       }
     }
   }
+
+  /**
+   * Handle HTTP/2 stream requests by proxying to HTTP/1 backends
+   */
+  public async handleHttp2(stream: any, headers: any): Promise<void> {
+    const startTime = Date.now();
+    const method = headers[':method'] || 'GET';
+    const path = headers[':path'] || '/';
+    // If configured to proxy to backends over HTTP/2, use HTTP/2 client sessions
+    if (this.options.backendProtocol === 'http2') {
+      const authority = headers[':authority'] as string || '';
+      const host = authority.split(':')[0];
+      const fakeReq: any = { headers: { host }, method: headers[':method'], url: headers[':path'], socket: (stream.session as any).socket };
+      const proxyConfig = this.router.routeReq(fakeReq);
+      if (!proxyConfig) {
+        stream.respond({ ':status': 404 });
+        stream.end('Not Found');
+        if (this.metricsTracker) this.metricsTracker.incrementFailedRequests();
+        return;
+      }
+      const destination = this.connectionPool.getNextTarget(proxyConfig.destinationIps, proxyConfig.destinationPorts[0]);
+      const key = `${destination.host}:${destination.port}`;
+      let session = this.h2Sessions.get(key);
+      if (!session || session.closed || (session as any).destroyed) {
+        session = plugins.http2.connect(`http://${destination.host}:${destination.port}`);
+        this.h2Sessions.set(key, session);
+        session.on('error', () => this.h2Sessions.delete(key));
+        session.on('close', () => this.h2Sessions.delete(key));
+      }
+      // Build headers for backend HTTP/2 request
+      const h2Headers: Record<string, any> = {
+        ':method': headers[':method'],
+        ':path': headers[':path'],
+        ':authority': `${destination.host}:${destination.port}`
+      };
+      for (const [k, v] of Object.entries(headers)) {
+        if (!k.startsWith(':') && typeof v === 'string') {
+          h2Headers[k] = v;
+        }
+      }
+      const h2Stream2 = session.request(h2Headers);
+      stream.pipe(h2Stream2);
+      h2Stream2.on('response', (hdrs: any) => {
+        // Map status and headers to client
+        const resp: Record<string, any> = { ':status': hdrs[':status'] as number };
+        for (const [hk, hv] of Object.entries(hdrs)) {
+          if (!hk.startsWith(':') && hv) resp[hk] = hv;
+        }
+        stream.respond(resp);
+        h2Stream2.pipe(stream);
+      });
+      h2Stream2.on('error', (err) => {
+        stream.respond({ ':status': 502 });
+        stream.end(`Bad Gateway: ${err.message}`);
+        if (this.metricsTracker) this.metricsTracker.incrementFailedRequests();
+      });
+      return;
+    }
+    try {
+      // Determine host for routing
+      const authority = headers[':authority'] as string || '';
+      const host = authority.split(':')[0];
+      // Fake request object for routing
+      const fakeReq: any = { headers: { host }, method, url: path, socket: (stream.session as any).socket };
+      const proxyConfig = this.router.routeReq(fakeReq as any);
+      if (!proxyConfig) {
+        stream.respond({ ':status': 404 });
+        stream.end('Not Found');
+        if (this.metricsTracker) this.metricsTracker.incrementFailedRequests();
+        return;
+      }
+      // Select backend target
+      const destination = this.connectionPool.getNextTarget(
+        proxyConfig.destinationIps,
+        proxyConfig.destinationPorts[0]
+      );
+      // Build headers for HTTP/1 proxy
+      const outboundHeaders: Record<string,string> = {};
+      for (const [key, value] of Object.entries(headers)) {
+        if (typeof key === 'string' && typeof value === 'string' && !key.startsWith(':')) {
+          outboundHeaders[key] = value;
+        }
+      }
+      if (outboundHeaders.host && (proxyConfig as any).rewriteHostHeader) {
+        outboundHeaders.host = `${destination.host}:${destination.port}`;
+      }
+      // Create HTTP/1 proxy request
+      const proxyReq = plugins.http.request(
+        { hostname: destination.host, port: destination.port, path, method, headers: outboundHeaders },
+        (proxyRes) => {
+          // Map status and headers back to HTTP/2
+          const responseHeaders: Record<string, number|string|string[]> = {};
+          for (const [k, v] of Object.entries(proxyRes.headers)) {
+            if (v !== undefined) responseHeaders[k] = v;
+          }
+          stream.respond({ ':status': proxyRes.statusCode || 500, ...responseHeaders });
+          proxyRes.pipe(stream);
+          stream.on('close', () => proxyReq.destroy());
+          stream.on('error', () => proxyReq.destroy());
+          if (this.metricsTracker) stream.on('end', () => this.metricsTracker.incrementRequestsServed());
+        }
+      );
+      proxyReq.on('error', (err) => {
+        stream.respond({ ':status': 502 });
+        stream.end(`Bad Gateway: ${err.message}`);
+        if (this.metricsTracker) this.metricsTracker.incrementFailedRequests();
+      });
+      // Pipe client stream to backend
+      stream.pipe(proxyReq);
+    } catch (err: any) {
+      stream.respond({ ':status': 500 });
+      stream.end('Internal Server Error');
+      if (this.metricsTracker) this.metricsTracker.incrementFailedRequests();
+    }
+  }
 }

ts/networkproxy/classes.np.types.ts

@@ -20,6 +20,8 @@ export interface INetworkProxyOptions {
   connectionPoolSize?: number; // Maximum connections to maintain in the pool to each backend
   portProxyIntegration?: boolean; // Flag to indicate this proxy is used by PortProxy
   useExternalPort80Handler?: boolean; // Flag to indicate using external Port80Handler
+  // Protocol to use when proxying to backends: HTTP/1.x or HTTP/2
+  backendProtocol?: 'http1' | 'http2';
   
   // ACME certificate management options
   acme?: {

ts/plugins.ts

@@ -5,9 +5,10 @@ import * as https from 'https';
 import * as net from 'net';
 import * as tls from 'tls';
 import * as url from 'url';
+import * as http2 from 'http2';
 
 
-export { EventEmitter, http, https, net, tls, url };
+export { EventEmitter, http, https, net, tls, url, http2 };
 
 // tsclass scope
 import * as tsclass from '@tsclass/tsclass';