Laravel 登录失败次数限制

在用户身份验证的情况下，Laravel 具有内置的身份验证系统。我们可以根据要求轻松修改它。身份验证中包含的功能之一是Throttling.

为什么我们需要throttling保护？

基本上，throttling是用来保护暴力攻击的。它将在一定时间内检查登录尝试。在短登录中，throttling会计算用户或机器人尝试失败的登录尝试次数。

使用自定义登录实现限制

默认情况下，在内置身份验证控制器中实现限制。但是，如果我们需要实现它到自定义登录呢？

实现自定义登录限制非常容易。首先，我们必须将ThrottlesLogins trait包含到您的控制器中。

use Illuminate\Foundation\Auth\ThrottlesLogins;

现在，将此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;
......

现在转到用于对用户进行身份验证的方法。在我的例子中，我使用了 login() POST 方法。并粘贴以下代码:

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，我们验证了用户提交的输入，然后实现了hasTooManyLoginAttempts() 方法。此方法将检查用户在某个时间是否执行过一定数量的失败尝试，然后系统将通过sendLockoutResponse() 方法阻止该用户。

现在，我们必须通过incrementLoginAttempts()方法指示对ThrottlesLogins trait的失败登录尝试。

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.']);

}
您还可以通过$maxAttempts和$decayMinutes属性更改允许的最大尝试次数和限制的分钟数。在这里，您可以找到完整的代码。

<?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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