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middleware.ts
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middleware.ts
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import { NextResponse } from "next/server";
import type { NextRequest } from "next/server";
import { ADMIN_PASSWORD_HEADER_KEY } from "./constants";
const loginRoute = "/auth/login";
// This function can be marked `async` if using `await` inside
export function middleware(request: NextRequest) {
const password = request.cookies.get(ADMIN_PASSWORD_HEADER_KEY)?.value;
const adminPassword = process.env.ADMIN_PASSWORD;
if (!adminPassword) {
// redirect to /warning
if (!isWarningPage(request.nextUrl.pathname)) {
return NextResponse.redirect(new URL("/warning", request.url));
}
}
const authenticated = password === adminPassword;
if (isAdminPath(request.nextUrl.pathname)) {
if (!authenticated) {
return NextResponse.redirect(new URL(loginRoute, request.url));
}
}
if (isLoginPath(request.nextUrl.pathname) && authenticated) {
return NextResponse.redirect(new URL("/admin", request.url));
}
}
const isAdminPath = (path: string) => path.startsWith("/admin");
const isLoginPath = (path: string) => path.startsWith(loginRoute);
const isWarningPage = (path: string) => path.startsWith("/warning");
// See "Matching Paths" below to learn more