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fix(proxy): validate host against allowlist to prevent open redirect (fixes #65) (#68)

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FuturMix 2026-06-14 13:44:26 +08:00 • committed by GitHub
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1 changed files with 4 additions and 3 deletions
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7
apps/logicsrc-web/src/proxy.ts
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@ -4,12 +4,13 @@ import type { NextRequest } from "next/server";
// Canonical host: 301 www.* to the bare apex domain over https, preserving // Canonical host: 301 www.* to the bare apex domain over https, preserving
// path + query (e.g. https://www.logicsrc.com/foo -> https://logicsrc.com/foo). // path + query (e.g. https://www.logicsrc.com/foo -> https://logicsrc.com/foo).
// This is the Next 16 "proxy" (formerly middleware) entrypoint. // This is the Next 16 "proxy" (formerly middleware) entrypoint.
const ALLOWED_APEX = process.env.PUBLIC_DOMAIN || "logicsrc.com";
export function proxy(request: NextRequest): NextResponse { export function proxy(request: NextRequest): NextResponse {
const host = request.headers.get("host") ?? ""; const host = request.headers.get("host") ?? "";
if (host.startsWith("www.")) { if (host === `www.${ALLOWED_APEX}`) {
const apexHost = host.slice("www.".length);
const { pathname, search } = request.nextUrl; const { pathname, search } = request.nextUrl;
return NextResponse.redirect(`https://${apexHost}${pathname}${search}`, 301); return NextResponse.redirect(`https://${ALLOWED_APEX}${pathname}${search}`, 301);
} }
return NextResponse.next(); return NextResponse.next();
} }