Laravel框架用户登陆身份验证实现方法详解
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2022-03-12 19:37:32
本文实例讲述了laravel框架用户登陆身份验证实现方法。分享给大家供大家参考,具体如下:
laravel中检测用户是否登录,有以下的代码:
if ( !aut...
本文实例讲述了laravel框架用户登陆身份验证实现方法。分享给大家供大家参考,具体如下:
laravel中检测用户是否登录,有以下的代码:
if ( !auth::guest() ) { return redirect::to('/dashboard'); }
那auth::guest
是如何调用的呢?
laravel用了facade模式,相关门面类在laravel/framework/src/illuminate/support/facades文件夹定义的,看下auth类的定义:
class auth extends facade { /** * get the registered name of the component. * * @return string */ protected static function getfacadeaccessor() { return 'auth'; } }
laravel框架中,facade模式使用反射,相关方法其实调用app['auth']中的方法,app['auth']是什么时候创建的呢,
authserviceprovider::register
方法会注册:
$this->app->bindshared('auth', function($app) { // once the authentication service has actually been requested by the developer // we will set a variable in the application indicating such. this helps us // know that we need to set any queued cookies in the after event later. $app['auth.loaded'] = true; return new authmanager($app); });
那为什么最终会调到哪里呢,看下堆栈:
illuminate\support\facades\auth::guest() illuminate\support\facades\facade::__callstatic illuminate\auth\authmanager->guest() illuminate\support\manager->__call public function __call($method, $parameters) { return call_user_func_array(array($this->driver(), $method), $parameters); }
看下driver的代码:
public function driver($driver = null) { $driver = $driver ?: $this->getdefaultdriver(); // if the given driver has not been created before, we will create the instances // here and cache it so we can return it next time very quickly. if there is // already a driver created by this name, we'll just return that instance. if ( ! isset($this->drivers[$driver])) { $this->drivers[$driver] = $this->createdriver($driver); } return $this->drivers[$driver]; }
没有会调用getdefaultdrive方法
/** * get the default authentication driver name. * * @return string */ public function getdefaultdriver() { return $this->app['config']['auth.driver']; }
最终调用的是配置文件中配置的driver,如果配的是
'driver' => 'eloquent'
则调用的是
public function createeloquentdriver() { $provider = $this->createeloquentprovider(); return new guard($provider, $this->app['session.store']); }
所以auth::guest
最终调用的是guard::guest
方法
这里的逻辑先从session中取用户信息,奇怪的是session里只保存的是用户id,然后拿这个id来从数据库中取用户信息
public function user() { if ($this->loggedout) return; // if we have already retrieved the user for the current request we can just // return it back immediately. we do not want to pull the user data every // request into the method because that would tremendously slow an app. if ( ! is_null($this->user)) { return $this->user; } $id = $this->session->get($this->getname()); // first we will try to load the user using the identifier in the session if // one exists. otherwise we will check for a "remember me" cookie in this // request, and if one exists, attempt to retrieve the user using that. $user = null; if ( ! is_null($id)) { //provider为eloquentuserprovider $user = $this->provider->retrievebyid($id); } // if the user is null, but we decrypt a "recaller" cookie we can attempt to // pull the user data on that cookie which serves as a remember cookie on // the application. once we have a user we can return it to the caller. $recaller = $this->getrecaller(); if (is_null($user) && ! is_null($recaller)) { $user = $this->getuserbyrecaller($recaller); } return $this->user = $user; }
更多关于laravel相关内容感兴趣的读者可查看本站专题:《laravel框架入门与进阶教程》、《php优秀开发框架总结》、《php面向对象程序设计入门教程》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》
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