wehub-resource-sync
05fcd08057
Deploy GitBook to 9router.github.io / build-deploy (push) Failing after 2s
33 lines
1.5 KiB
JavaScript
33 lines
1.5 KiB
JavaScript
const http = require("http");
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const origCreate = http.createServer.bind(http);
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// Wrap Next standalone HTTP server: derive client IP from the TCP socket
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// (unspoofable) and strip client-supplied forwarding headers so downstream
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// rate-limiting keys on the real peer address instead of attacker-controlled XFF.
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http.createServer = (...args) => {
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const handler = args.find((a) => typeof a === "function");
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const rest = args.filter((a) => typeof a !== "function");
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if (!handler) return origCreate(...args);
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const wrapped = (req, res) => {
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const socketIp = req.socket && req.socket.remoteAddress ? req.socket.remoteAddress : "";
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const xff = req.headers["x-forwarded-for"];
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const xRealIp = req.headers["x-real-ip"];
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const viaProxy = !!(xff || xRealIp);
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const isLoopbackProxy = socketIp === "127.0.0.1" || socketIp === "::1" || socketIp === "::ffff:127.0.0.1";
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// Trust forwarding headers only when the TCP peer is a local reverse proxy.
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// Direct/public sockets remain keyed by the unspoofable peer address.
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const proxyIp = xRealIp || (xff ? String(xff).split(",")[0].trim() : "");
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const ip = isLoopbackProxy && proxyIp ? proxyIp : socketIp;
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delete req.headers["x-9r-real-ip"];
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delete req.headers["x-forwarded-for"];
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delete req.headers["x-9r-via-proxy"];
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req.headers["x-9r-real-ip"] = ip;
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if (viaProxy) req.headers["x-9r-via-proxy"] = "1";
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return handler(req, res);
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};
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return origCreate(...rest, wrapped);
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};
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require("./server.js");
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