Strategi Autentikasi Khusus

export default function LoginPage() {
  return (
    <form>
      <h2>Login</h2>
      <label htmlFor="username">Username:</label>
      <input id="username" name="username" type="text" required />

      <label htmlFor="password">Password:</label>
      <input id="password" name="password" type="password" required />

      <button type="submit">Log In</button>
    </form>
  );
}

'use server';

// Mock Next.js APIs for runnable example
const mockCookies = {
  _store: {},
  set: (n, v, o) => {
    mockCookies._store[n] = { v, o };
    console.log(`[MOCK] Cookie: ${n}=${v}`);
  },
  get: (n) => mockCookies._store[n] ? { value: mockCookies._store[n].v } : undefined,
  delete: (n) => {
    delete mockCookies._store[n];
    console.log(`[MOCK] Deleted: ${n}`);
  }
};
const mockRedirect = (path) => {
  console.log(`[MOCK] Redirect to: ${path}`);
  throw new Error(`MOCK_REDIRECT:${path}`);
};

// Actual Server Action logic
export async function login(formData) {
  const username = formData.get('username');
  const password = formData.get('password');
  const users = {'testuser': 'password123'}; // Mock DB

  if (users[username] === password) {
    mockCookies.set('session', 'some_token', { httpOnly: true, maxAge: 3600 });
    mockRedirect('/dashboard');
  } else {
    console.error('Login failed: Invalid credentials');
  }
}

// Main entry point for runnable example
async function main() {
  console.log("--- Test Login Success ---");
  const successForm = new Map([
    ['username', 'testuser'],
    ['password', 'password123']
  ]);
  try { await login(successForm); }
  catch (e) { console.log(e.message); }

  console.log("\n--- Test Login Fail ---");
  const failForm = new Map([
    ['username', 'wrong'],
    ['password', 'pass']
  ]);
  try { await login(failForm); }
  catch (e) { console.log(e.message); }
  console.log("Final cookies:", mockCookies._store);
}
main();

// middleware.js
import { NextResponse } from 'next/server';

export function middleware(request) {
  const sessionCookie = request.cookies.get('session');
  const pathname = request.nextUrl.pathname;

  // Define protected routes
  const protectedRoutes = ['/dashboard'];

  if (protectedRoutes.includes(pathname) && !sessionCookie) {
    // Redirect to login if no session
    const loginUrl = new URL('/login', request.url);
    return NextResponse.redirect(loginUrl);
  }

  return NextResponse.next(); // Allow request to proceed
}

// Configure matcher to run middleware on specific paths
export const config = {
  matcher: ['/((?!api|_next/static|_next/image|favicon.ico|login).*)'],
};

'use server';

// Mock Next.js APIs for runnable example
const mockCookies = {
  _store: { 'session': { v: 'active_token' } }, // Simulate active session
  set: (n, v, o) => {
    mockCookies._store[n] = { v, o };
    console.log(`[MOCK] Cookie: ${n}=${v}`);
  },
  get: (n) => mockCookies._store[n] ? { value: mockCookies._store[n].v } : undefined,
  delete: (n) => {
    delete mockCookies._store[n];
    console.log(`[MOCK] Deleted: ${n}`);
  }
};
const mockRedirect = (path) => {
  console.log(`[MOCK] Redirect to: ${path}`);
  throw new Error(`MOCK_REDIRECT:${path}`);
};

// Actual Server Action logic
export async function logout() {
  mockCookies.delete('session');
  mockRedirect('/login');
}

// Main entry point for runnable example
async function main() {
  console.log("--- Before Logout ---");
  console.log("Initial cookies:", mockCookies._store);

  console.log("\n--- Attempting Logout ---");
  try { await logout(); }
  catch (e) { console.log(e.message); }
  console.log("Final cookies:", mockCookies._store);
}
main();