V1.1.0: Auth dazugefügt

middleware.ts

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+import { NextRequest, NextResponse } from 'next/server';
+import { cookies } from 'next/headers';
+import { jwtVerify } from 'jose';
+
+const SESSION_COOKIE_NAME = 'auth_session';
+
+/**
+ * Middleware to protect routes with authentication
+ * Reusable for other projects - just copy this file
+ */
+export async function middleware(request: NextRequest) {
+  const { pathname } = request.nextUrl;
+
+  // Check if authentication is enabled
+  const authEnabled = !!process.env.AUTH_USERS;
+  
+  // If auth is not enabled, allow all requests
+  if (!authEnabled) {
+    return NextResponse.next();
+  }
+
+  // Public paths that don't require authentication
+  const publicPaths = ['/login'];
+  const isPublicPath = publicPaths.some(path => pathname.startsWith(path));
+
+  if (isPublicPath) {
+    return NextResponse.next();
+  }
+
+  // Check for session cookie
+  const cookieStore = await cookies();
+  const sessionCookie = cookieStore.get(SESSION_COOKIE_NAME);
+
+  if (!sessionCookie) {
+    return NextResponse.redirect(new URL('/login', request.url));
+  }
+
+  // Verify session token
+  try {
+    const secretKey = process.env.AUTH_SECRET || 'default-secret-change-in-production';
+    const key = new TextEncoder().encode(secretKey);
+    
+    const { payload } = await jwtVerify(sessionCookie.value, key, {
+      algorithms: ['HS256'],
+    });
+
+    // Check if session is expired
+    if (payload.expiresAt && (payload.expiresAt as number) < Date.now()) {
+      const response = NextResponse.redirect(new URL('/login', request.url));
+      response.cookies.delete(SESSION_COOKIE_NAME);
+      return response;
+    }
+
+    return NextResponse.next();
+  } catch (error) {
+    // Invalid token - redirect to login
+    const response = NextResponse.redirect(new URL('/login', request.url));
+    response.cookies.delete(SESSION_COOKIE_NAME);
+    return response;
+  }
+}
+
+export const config = {
+  matcher: [
+    /*
+     * Match all request paths except for the ones starting with:
+     * - _next/static (static files)
+     * - _next/image (image optimization files)
+     * - favicon.ico (favicon file)
+     * - public folder
+     */
+    '/((?!_next/static|_next/image|favicon.ico|.*\\.(?:svg|png|jpg|jpeg|gif|webp)$).*)',
+  ],
+};