92 lines
3.2 KiB
PHP
92 lines
3.2 KiB
PHP
<?php
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namespace App\Http\Controllers\Auth;
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use App\Http\Controllers\Controller;
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use Illuminate\Http\RedirectResponse;
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use Illuminate\Http\Request;
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use Illuminate\Support\Facades\Auth;
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use Illuminate\Support\Facades\RateLimiter;
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use Illuminate\Validation\ValidationException;
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use Illuminate\View\View;
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class LoginController extends Controller
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{
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// 限流参数：10 分钟内最多 5 次错误，超出后锁定至窗口结束（≈10 分钟）
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protected const MAX_ATTEMPTS = 5;
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protected const DECAY_SECONDS = 600;
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public function show(): View
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{
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return view('auth.login');
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}
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public function store(Request $request): RedirectResponse
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{
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$key = $this->throttleKey($request);
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// 锁定检查：10 分钟内错误满 5 次即锁定，提示等待时长
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if (RateLimiter::tooManyAttempts($key, self::MAX_ATTEMPTS)) {
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$seconds = RateLimiter::availableIn($key);
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$request->session()->forget('captcha');
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throw ValidationException::withMessages([
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'email' => '登录尝试过于频繁，出于安全考虑已临时锁定。请在约 '.ceil($seconds / 60).' 分钟（'.ceil($seconds).' 秒）后重试。',
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]);
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}
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$credentials = $request->validate([
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'email' => ['required', 'email'],
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'password' => ['required', 'string'],
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'captcha' => ['required', 'string', function ($attribute, $value, $fail) use ($request) {
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if (strtolower(trim((string) $value)) !== strtolower((string) $request->session()->get('captcha', ''))) {
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$fail('图形验证码不正确，请重新输入。');
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}
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}],
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]);
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if (Auth::attempt(['email' => $credentials['email'], 'password' => $credentials['password']], $request->boolean('remember'))) {
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RateLimiter::clear($key);
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$request->session()->forget('captcha');
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$request->session()->regenerate();
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return redirect()->intended('/');
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}
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// 失败：记录一次错误（10 分钟滚动窗口），并给出剩余次数提醒
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RateLimiter::hit($key, self::DECAY_SECONDS);
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$attempts = RateLimiter::attempts($key);
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$left = max(0, self::MAX_ATTEMPTS - $attempts);
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$request->session()->forget('captcha');
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$msg = '账号或密码不正确。';
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if ($left > 0) {
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$msg .= "（已错误 {$attempts} 次，再错 {$left} 次将锁定 10 分钟）";
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} else {
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$msg .= '（错误次数过多，已锁定 10 分钟）';
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}
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return back()->withErrors([
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'email' => $msg,
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])->onlyInput('email');
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}
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protected function throttleKey(Request $request): string
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{
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return 'login:'.strtolower($request->input('email', '')).':'.$request->ip();
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}
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/**
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* 退出登录。定义为控制器方法而非闭包，
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* 以保证生产环境 `php artisan route:cache` 可用。
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*/
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public function destroy(Request $request): RedirectResponse
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{
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Auth::guard('web')->logout();
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$request->session()->invalidate();
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$request->session()->regenerateToken();
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return redirect('/');
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}
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}
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