// 通过唯一标示符获取认证模型
public function retrieveById($identifier);
// 通过唯一标示符和 remember token 获取模型
public function retrieveByToken($identifier, $token);
// 通过给定的认证模型更新 remember token
public function updateRememberToken(Authenticatable $user, $token);
// 通过给定的凭证获取用户，比如 email 或用户名等等
public function retrieveByCredentials(array $credentials);
// 认证给定的用户和给定的凭证是否符合
public function validateCredentials(Authenticatable $user, array $credentials);

<"remember me" token.
 * @param mixed $identifier
 * @param string $token
 * @return \Illuminate\Contracts\Auth\Authenticatable|null
 */
 public function retrieveByToken($identifier, $token)
 {
 return null;
 }

 /**
 * Update the "remember me" token for the given user in storage.
 * @param \Illuminate\Contracts\Auth\Authenticatable $user
 * @param string   $token
 * @return bool
 */
 public function updateRememberToken(Authenticatable $user, $token)
 {
 return true;
 }

 /**
 * Retrieve a user by the given credentials.
 * @param array $credentials
 * @return \Illuminate\Contracts\Auth\Authenticatable|null
 */
 public function retrieveByCredentials(array $credentials)
 {
 if ( !isset($credentials['api_token'])) {
 return null;
 }

 return app(User::class)::getUserByToken($credentials['api_token']);
 }

 /**
 * Rules a user against the given credentials.
 * @param \Illuminate\Contracts\Auth\Authenticatable $user
 * @param array   $credentials
 * @return bool
 */
 public function validateCredentials(Authenticatable $user, array $credentials)
 {
 if ( !isset($credentials['api_token'])) {
 return false;
 }

 return true;
 }
}

<"htmlcode">

<"color: #ff0000">Guard 接口


Illuminate\Contracts\Auth\Guard


Guard 接口定义了某个实现了 Authenticatable (可认证的) 模型或类的认证方法以及一些常用的接口。




// 判断当前用户是否登录
public function check();
// 判断当前用户是否是游客（未登录）
public function guest();
// 获取当前认证的用户
public function user();
// 获取当前认证用户的 id，严格来说不一定是 id，应该是上个模型中定义的唯一的字段名
public function id();
// 根据提供的消息认证用户
public function validate(array $credentials = []);
// 设置当前用户
public function setUser(Authenticatable $user);


StatefulGuard 接口


Illuminate\Contracts\Auth\StatefulGuard


StatefulGuard 接口继承自 Guard 接口，除了 Guard 里面定义的一些基本接口外，还增加了更进一步、有状态的 Guard.

新添加的接口有这些：




// 尝试根据提供的凭证验证用户是否合法
public function attempt(array $credentials = [], $remember = false);
// 一次性登录，不记录session or cookie
public function once(array $credentials = []);
// 登录用户，通常在验证成功后记录 session 和 cookie 
public function login(Authenticatable $user, $remember = false);
// 使用用户 id 登录
public function loginUsingId($id, $remember = false);
// 使用用户 ID 登录，但是不记录 session 和 cookie
public function onceUsingId($id);
// 通过 cookie 中的 remember token 自动登录
public function viaRemember();
// 登出
public function logout();


Laravel 中默认提供了 3 中 guard ：RequestGuard，TokenGuard，SessionGuard.


RequestGuard


Illuminate\Auth\RequestGuard


RequestGuard 是一个非常简单的 guard. RequestGuard 是通过传入一个闭包来认证的。可以通过调用 Auth::viaRequest 添加一个自定义的 RequestGuard.


SessionGuard


Illuminate\Auth\SessionGuard


SessionGuard 是 Laravel web 认证默认的 guard.


TokenGuard


Illuminate\Auth\TokenGuard


TokenGuard 适用于无状态 api 认证，通过 token 认证.


实现自定义 Guard


App\Auth\UserGuard.php




<"column" in persistent storage.
 *
 * @var string
 */
 protected $storageKey;

 /**
 * The user we last attempted to retrieve
 * @var
 */
 protected $lastAttempted;

 /**
 * UserGuard constructor.
 * @param UserProvider $provider
 * @param Request $request
 * @return void
 */
 public function __construct(UserProvider $provider, Request $request = null)
 {
 $this->request = $request;
 $this->provider = $provider;
 $this->inputKey = 'Authorization';
 $this->storageKey = 'api_token';
 }

 /**
 * Get the currently authenticated user.
 * @return \Illuminate\Contracts\Auth\Authenticatable|null
 */
 public function user()
 {
 if(!is_null($this->user)) {
  return $this->user;
 }

 $user = null;

 $token = $this->getTokenForRequest();

 if(!empty($token)) {
  $user = $this->provider->retrieveByCredentials(
  [$this->storageKey => $token]
  );
 }

 return $this->user = $user;
 }

 /**
 * Rules a user's credentials.
 * @param array $credentials
 * @return bool
 */
 public function validate(array $credentials = [])
 {
 if (empty($credentials[$this->inputKey])) {
  return false;
 }

 $credentials = [$this->storageKey => $credentials[$this->inputKey]];

 $this->lastAttempted = $user = $this->provider->retrieveByCredentials($credentials);

 return $this->hasValidCredentials($user, $credentials);
 }

 /**
 * Determine if the user matches the credentials.
 * @param mixed $user
 * @param array $credentials
 * @return bool
 */
 protected function hasValidCredentials($user, $credentials)
 {
 return !is_null($user) && $this->provider->validateCredentials($user, $credentials);
 }


 /**
 * Get the token for the current request.
 * @return string
 */
 public function getTokenForRequest()
 {
 $token = $this->request->header($this->inputKey);

 return $token;
 }

 /**
 * Set the current request instance.
 *
 * @param \Illuminate\Http\Request $request
 * @return $this
 */
 public function setRequest(Request $request)
 {
 $this->request = $request;

 return $this;
 }
}


在 AppServiceProvider 的 boot 方法添加如下代码：


App\Providers\AuthServiceProvider.php




<"auth:api".');
});
.
.
.


在 config\auth.php的 guards 数组中添加自定义 guard，一个自定义 guard 包括两部分： driver 和 provider.
设置 config\auth.php 的 defaults.guard 为 api.




<"guard" and password
 | reset options for your application. You may change these defaults
 | as required, but they're a perfect start for most applications.
 |
 */

 'defaults' => [
 'guard' => 'api',
 'passwords' => 'users',
 ],

 /*
 |--------------------------------------------------------------------------
 | Authentication Guards
 |--------------------------------------------------------------------------
 |
 | Next, you may define every authentication guard for your application.
 | Of course, a great default configuration has been defined for you
 | here which uses session storage and the Eloquent user provider.
 |
 | All authentication drivers have a user provider. This defines how the
 | users are actually retrieved out of your database or other storage
 | mechanisms used by this application to persist your user's data.
 |
 | Supported: "session", "token"
 |
 */

 'guards' => [
 'web' => [
  'driver' => 'session',
  'provider' => 'users',
 ],

 'api' => [
  'driver' => 'token',
  'provider' => 'token',
 ],
 ],

 /*
 |--------------------------------------------------------------------------
 | User Providers
 |--------------------------------------------------------------------------
 |
 | All authentication drivers have a user provider. This defines how the
 | users are actually retrieved out of your database or other storage
 | mechanisms used by this application to persist your user's data.
 |
 | If you have multiple user tables or models you may configure multiple
 | sources which represent each model / table. These sources may then
 | be assigned to any extra authentication guards you have defined.
 |
 | Supported: "database", "eloquent"
 |
 */

 'providers' => [
 'users' => [
  'driver' => 'eloquent',
  'model' => App\Models\User::class,
 ],

 'token' => [
  'driver' => 'token',
  'model' => App\Models\User::class,
 ],
 ],

 /*
 |--------------------------------------------------------------------------
 | Resetting Passwords
 |--------------------------------------------------------------------------
 |
 | You may specify multiple password reset configurations if you have more
 | than one user table or model in the application and you want to have
 | separate password reset settings based on the specific user types.
 |
 | The expire time is the number of minutes that the reset token should be
 | considered valid. This security feature keeps tokens short-lived so
 | they have less time to be guessed. You may change this as needed.
 |
 */

 'passwords' => [
 'users' => [
  'provider' => 'users',
  'table' => 'password_resets',
  'expire' => 60,
 ],
 ],

];


使用 方式:



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