@push.rocks/smartproxy
Version:
A powerful proxy package with unified route-based configuration for high traffic management. Features include SSL/TLS support, flexible routing patterns, WebSocket handling, advanced security options, and automatic ACME certificate management.
201 lines • 18.6 kB
JavaScript
import * as plugins from '../../plugins.js';
/**
* HTTP/2 Request Handler Helper - handles HTTP/2 streams with specific destinations
* This is a helper class for the main RequestHandler
*/
export class Http2RequestHandler {
/**
* Handle HTTP/2 stream with direct HTTP/2 backend
*/
static async handleHttp2WithHttp2Destination(stream, headers, destination, routeContext, sessions, logger, metricsTracker) {
const key = `${destination.host}:${destination.port}`;
// Get or create a client HTTP/2 session
let session = sessions.get(key);
if (!session || session.closed || session.destroyed) {
try {
// Connect to the backend HTTP/2 server
session = plugins.http2.connect(`http://${destination.host}:${destination.port}`);
sessions.set(key, session);
// Handle session errors and cleanup
session.on('error', (err) => {
logger.error(`HTTP/2 session error to ${key}: ${err.message}`);
sessions.delete(key);
});
session.on('close', () => {
logger.debug(`HTTP/2 session closed to ${key}`);
sessions.delete(key);
});
}
catch (err) {
logger.error(`Failed to establish HTTP/2 session to ${key}: ${err.message}`);
stream.respond({ ':status': 502 });
stream.end('Bad Gateway: Failed to establish connection to backend');
if (metricsTracker)
metricsTracker.incrementFailedRequests();
return;
}
}
try {
// Build headers for backend HTTP/2 request
const h2Headers = {
':method': headers[':method'],
':path': headers[':path'],
':authority': `${destination.host}:${destination.port}`
};
// Copy other headers, excluding pseudo-headers
for (const [key, value] of Object.entries(headers)) {
if (!key.startsWith(':') && typeof value === 'string') {
h2Headers[key] = value;
}
}
logger.debug(`Proxying HTTP/2 request to ${destination.host}:${destination.port}${headers[':path']}`, { method: headers[':method'] });
// Create HTTP/2 request stream to the backend
const h2Stream = session.request(h2Headers);
// Pipe client stream to backend stream
stream.pipe(h2Stream);
// Handle responses from the backend
h2Stream.on('response', (responseHeaders) => {
// Map status and headers to client response
const resp = {
':status': responseHeaders[':status']
};
// Copy non-pseudo headers
for (const [key, value] of Object.entries(responseHeaders)) {
if (!key.startsWith(':') && value !== undefined) {
resp[key] = value;
}
}
// Send headers to client
stream.respond(resp);
// Pipe backend response to client
h2Stream.pipe(stream);
// Track successful requests
stream.on('end', () => {
if (metricsTracker)
metricsTracker.incrementRequestsServed();
logger.debug(`HTTP/2 request completed: ${headers[':method']} ${headers[':path']} ${responseHeaders[':status']}`, { method: headers[':method'], status: responseHeaders[':status'] });
});
});
// Handle backend errors
h2Stream.on('error', (err) => {
logger.error(`HTTP/2 stream error: ${err.message}`);
// Only send error response if headers haven't been sent
if (!stream.headersSent) {
stream.respond({ ':status': 502 });
stream.end(`Bad Gateway: ${err.message}`);
}
else {
stream.end();
}
if (metricsTracker)
metricsTracker.incrementFailedRequests();
});
// Handle client stream errors
stream.on('error', (err) => {
logger.debug(`Client HTTP/2 stream error: ${err.message}`);
h2Stream.destroy();
if (metricsTracker)
metricsTracker.incrementFailedRequests();
});
}
catch (err) {
logger.error(`Error handling HTTP/2 request: ${err.message}`);
// Only send error response if headers haven't been sent
if (!stream.headersSent) {
stream.respond({ ':status': 500 });
stream.end('Internal Server Error');
}
else {
stream.end();
}
if (metricsTracker)
metricsTracker.incrementFailedRequests();
}
}
/**
* Handle HTTP/2 stream with HTTP/1 backend
*/
static async handleHttp2WithHttp1Destination(stream, headers, destination, routeContext, logger, metricsTracker) {
try {
// Build headers for HTTP/1 proxy request, excluding HTTP/2 pseudo-headers
const outboundHeaders = {};
for (const [key, value] of Object.entries(headers)) {
if (typeof key === 'string' && typeof value === 'string' && !key.startsWith(':')) {
outboundHeaders[key] = value;
}
}
// Always rewrite host header to match target
outboundHeaders.host = `${destination.host}:${destination.port}`;
logger.debug(`Proxying HTTP/2 request to HTTP/1 backend ${destination.host}:${destination.port}${headers[':path']}`, { method: headers[':method'] });
// Create HTTP/1 proxy request
const proxyReq = plugins.http.request({
hostname: destination.host,
port: destination.port,
path: headers[':path'],
method: headers[':method'],
headers: outboundHeaders
}, (proxyRes) => {
// Map status and headers back to HTTP/2
const responseHeaders = {
':status': proxyRes.statusCode || 500
};
// Copy headers from HTTP/1 response to HTTP/2 response
for (const [key, value] of Object.entries(proxyRes.headers)) {
if (value !== undefined) {
responseHeaders[key] = value;
}
}
// Send headers to client
stream.respond(responseHeaders);
// Pipe HTTP/1 response to HTTP/2 stream
proxyRes.pipe(stream);
// Clean up when client disconnects
stream.on('close', () => proxyReq.destroy());
stream.on('error', () => proxyReq.destroy());
// Track successful requests
stream.on('end', () => {
if (metricsTracker)
metricsTracker.incrementRequestsServed();
logger.debug(`HTTP/2 to HTTP/1 request completed: ${headers[':method']} ${headers[':path']} ${proxyRes.statusCode}`, { method: headers[':method'], status: proxyRes.statusCode });
});
});
// Handle proxy request errors
proxyReq.on('error', (err) => {
logger.error(`HTTP/1 proxy error: ${err.message}`);
// Only send error response if headers haven't been sent
if (!stream.headersSent) {
stream.respond({ ':status': 502 });
stream.end(`Bad Gateway: ${err.message}`);
}
else {
stream.end();
}
if (metricsTracker)
metricsTracker.incrementFailedRequests();
});
// Pipe client stream to proxy request
stream.pipe(proxyReq);
// Handle client stream errors
stream.on('error', (err) => {
logger.debug(`Client HTTP/2 stream error: ${err.message}`);
proxyReq.destroy();
if (metricsTracker)
metricsTracker.incrementFailedRequests();
});
}
catch (err) {
logger.error(`Error handling HTTP/2 to HTTP/1 request: ${err.message}`);
// Only send error response if headers haven't been sent
if (!stream.headersSent) {
stream.respond({ ':status': 500 });
stream.end('Internal Server Error');
}
else {
stream.end();
}
if (metricsTracker)
metricsTracker.incrementFailedRequests();
}
}
}
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