69 lines
2.1 KiB
JavaScript
69 lines
2.1 KiB
JavaScript
const express = require('express');
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const { createProxyMiddleware } = require('http-proxy-middleware');
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const app = express();
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const port = 8080;
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// Middleware to handle dynamic IPv6 proxying
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// app.use('/:ipv6', (req, res, next) => {
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// const ipv6 = req.params.ipv6;
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// // Validate or sanitize the IPv6 if needed
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// const targetUrl = `http://[${ipv6}]:8000`;
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// console.log(`Proxying request to: ${targetUrl}`);
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// // Create and attach the proxy middleware *once per request*
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// const proxy = createProxyMiddleware({
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// target: targetUrl,
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// changeOrigin: true,
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// logLevel: 'debug',
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// // pathRewrite: {
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// // [`^/${ipv6}`]: '/', // Send to root of the target
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// // },
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// onError(err, req, res) {
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// console.error('Proxy error:', err.message);
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// res.status(502).send('Bad Gateway: Failed to connect to target');
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// }
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// });
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// return proxy(req, res, next);
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// });
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// Cache proxy instances per target to avoid recreating each time
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const proxyCache = new Map();
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// Basic IPv6 validation pattern (can be improved or replaced with a library like 'ipaddr.js')
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const isValidIPv6 = (ip) => /^[0-9a-fA-F:]+$/.test(ip);
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app.use('/:ipv6', (req, res, next) => {
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const ipv6 = req.params.ipv6;
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if (!isValidIPv6(ipv6)) {
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return res.status(400).send('Invalid IPv6 address');
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}
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const targetUrl = `http://[${ipv6}]:8000`;
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console.log(`Proxying to: ${targetUrl}`);
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// Reuse proxy middleware for the same target
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if (!proxyCache.has(targetUrl)) {
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proxyCache.set(targetUrl, createProxyMiddleware({
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target: targetUrl,
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changeOrigin: true,
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logLevel: 'debug',
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pathRewrite: (path, req) => path.replace(`/${ipv6}`, '/'),
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onError(err, req, res) {
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console.error(`Proxy error for ${targetUrl}:`, err.message);
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if (!res.headersSent) {
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res.status(502).send('Bad Gateway: Failed to connect to target');
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}
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}
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}));
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}
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return proxyCache.get(targetUrl)(req, res, next);
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});
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app.listen(port, '0.0.0.0', () => {
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console.log(`Proxy server listening on http://0.0.0.0:${port}`);
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});
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