102 lines
2.8 KiB
TypeScript
102 lines
2.8 KiB
TypeScript
import createMiddleware from "next-intl/middleware";
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import { NextResponse } from "next/server";
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import type { NextRequest } from "next/server";
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import { routing } from "./i18n/routing";
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import {
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getRequestHostname,
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isAdminHost,
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isInternalAdminPath,
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isLegacyAdminPath,
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toInternalAdminPath,
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} from "./lib/admin-routing";
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const intlMiddleware = createMiddleware(routing);
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function getAdminBasicAuthUser(): string {
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return process.env.ADMIN_BASIC_AUTH_USER ?? "";
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}
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function getAdminBasicAuthPass(): string {
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return process.env.ADMIN_BASIC_AUTH_PASS ?? "";
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}
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function isAdminBasicAuthConfigured(): boolean {
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return Boolean(getAdminBasicAuthUser() && getAdminBasicAuthPass());
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}
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function isAdminBasicAuthValid(request: NextRequest): boolean {
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if (!isAdminBasicAuthConfigured()) {
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return false;
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}
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const header = request.headers.get("authorization");
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if (!header || !header.startsWith("Basic ")) {
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return false;
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}
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try {
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const decoded = atob(header.slice(6));
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const index = decoded.indexOf(":");
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if (index === -1) {
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return false;
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}
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const user = decoded.slice(0, index);
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const pass = decoded.slice(index + 1);
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return user === getAdminBasicAuthUser() && pass === getAdminBasicAuthPass();
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} catch {
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return false;
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}
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}
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export default async function middleware(request: NextRequest) {
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const { pathname } = request.nextUrl;
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const hostname = getRequestHostname(
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request.headers.get("x-forwarded-host") ?? request.headers.get("host") ?? request.nextUrl.hostname,
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);
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const isAdminRequest = isAdminHost(hostname);
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const adminRobotsHeaders = {
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"X-Robots-Tag": "noindex, nofollow, noarchive, nosnippet, noimageindex",
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};
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if (isInternalAdminPath(pathname) || isLegacyAdminPath(pathname)) {
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return new NextResponse("Not Found", {
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status: 404,
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});
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}
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if (isAdminRequest) {
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if (isAdminBasicAuthConfigured() && !isAdminBasicAuthValid(request)) {
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return new NextResponse("Authentication required", {
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status: 401,
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headers: {
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"WWW-Authenticate": 'Basic realm="Admin Area", charset="UTF-8"',
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...adminRobotsHeaders,
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},
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});
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}
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const rewriteUrl = request.nextUrl.clone();
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rewriteUrl.pathname = toInternalAdminPath(pathname);
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const response = NextResponse.rewrite(rewriteUrl);
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response.headers.set("X-Robots-Tag", adminRobotsHeaders["X-Robots-Tag"]);
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return response;
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}
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if (pathname === "/de" || pathname.startsWith("/de/")) {
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const redirectUrl = request.nextUrl.clone();
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const nextPath = pathname.slice(3) || "/";
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redirectUrl.pathname = nextPath;
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return NextResponse.redirect(redirectUrl, 308);
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}
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return intlMiddleware(request);
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}
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export const config = {
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matcher: ["/((?!api|trpc|_next|_vercel|.*\\..*).*)"],
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};
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