在用戶身份驗證的情況下，Laravel 具有內置的身份驗證系統。我們可以根據要求輕松修改它。身份驗證中包含的功能之一是Throttling.
為什么我們需要throttling保護？
基本上，throttling是用來保護暴力攻擊的。它將在一定時間內檢查登錄嘗試。在短登錄中，throttling會計算用戶或機器人嘗試失敗的登錄嘗試次數。
使用自定義登錄實現限制
默認情況下，在內置身份驗證控制器中實現限制。但是，如果我們需要實現它到自定義登錄呢？
實現自定義登錄限制非常容易。首先，我們必須將ThrottlesLogins trait包含到您的控制器中。
use Illuminate\Foundation\Auth\ThrottlesLogins;
現在，將此ThrottlesLogins trait 加到控制器中。
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use Illuminate\Foundation\Auth\ThrottlesLogins;
class AuthController extends Controller
{
use ThrottlesLogins;
......
現在轉到用于對用戶進行身份驗證的方法。在我的例子中，我使用了 login() POST 方法。并粘貼以下代碼:
public function login(Request $request)
{
// Authenticate Inputs
$request->validate([
'username' => 'required',
'password' => 'required|min:6|max:18'
]);
// If the class is using the ThrottlesLogins trait, we can automatically throttle
// the login attempts for this application. We'll key this by the username and
// the IP address of the client making these requests into this application.
if (method_exists($this, 'hasTooManyLoginAttempts')
$this->hasTooManyLoginAttempts($request)) {
$this->fireLockoutEvent($request);
return $this->sendLockoutResponse($request);
}
.......
首先，我們驗證了用戶提交的輸入，然后實現了hasTooManyLoginAttempts() 方法。此方法將檢查用戶在某個時間是否執行過一定數量的失敗嘗試，然后系統將通過sendLockoutResponse() 方法阻止該用戶。
現在，我們必須通過incrementLoginAttempts()方法指示對ThrottlesLogins trait的失敗登錄嘗試。
if( Auth::attempt(['username' => $username, 'password' => $password]) ){
// Redirect to appropriate dashboard
}
else {
// If the login attempt was unsuccessful we will increment the number of attempts
// to login and redirect the user back to the login form. Of course, when this
// user surpasses their maximum number of attempts they will get locked out.
$this->incrementLoginAttempts($request);
return redirect()->back()
->withInput($request->all())
->withErrors(['error' => 'Please check your username / password.']);
}
您還可以通過$maxAttempts和$decayMinutes屬性更改允許的最大嘗試次數和限制的分鐘數。在這里，您可以找到完整的代碼。
?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use Illuminate\Foundation\Auth\ThrottlesLogins;
class AuthController extends Controller
{
use ThrottlesLogins;
/**
* The maximum number of attempts to allow.
*
* @return int
*/
protected $maxAttempts = 5;
/**
* The number of minutes to throttle for.
*
* @return int
*/
protected $decayMinutes = 1;
public function login(Request $request)
{
// Authenticate Inputs
$request->validate([
'username' => 'required',
'password' => 'required|min:6|max:18'
]);
// If the class is using the ThrottlesLogins trait, we can automatically throttle
// the login attempts for this application. We'll key this by the username and
// the IP address of the client making these requests into this application.
if (method_exists($this, 'hasTooManyLoginAttempts')
$this->hasTooManyLoginAttempts($request)) {
$this->fireLockoutEvent($request);
return $this->sendLockoutResponse($request);
}
$username = $request->username;
$password = $request->password;
if( Auth::attempt(['username' => $username, 'password' => $password]) ){
// Redirect to appropriate dashboard
}
else {
// If the login attempt was unsuccessful we will increment the number of attempts
// to login and redirect the user back to the login form. Of course, when this
// user surpasses their maximum number of attempts they will get locked out.
$this->incrementLoginAttempts($request);
return redirect()->back()
->withInput($request->all())
->withErrors(['error' => 'Please check your username / password.']);
}
}
}
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