背景
项目用户量逐渐增大，接口调用次数越来越多，所以决定使用Redis存token，缓解数据库压力
调研
在config/auth.php文件中发现用户的驱动使用的是EloquentUserProvider服务提供器，然后查找EloquentUserProvider.php 然后发现在vendor/laravel/framework/src/Illuminate/Auth文件下存在该文件
<?php
namespace Illuminate\Auth;
use Illuminate\Support\Str;
use Illuminate\Contracts\Auth\UserProvider;
use Illuminate\Contracts\Hashing\Hasher as HasherContract;
use Illuminate\Contracts\Auth\Authenticatable as UserContract;
class EloquentUserProvider implements UserProvider
{
/**
* The hasher implementation.
*
* @var \Illuminate\Contracts\Hashing\Hasher
*/
protected $hasher;
/**
* The Eloquent user model.
*
* @var string
*/
protected $model;
/**
* Create a new database user provider.
*
* @param \Illuminate\Contracts\Hashing\Hasher $hasher
* @param string $model
* @return void
*/
public function __construct(HasherContract $hasher, $model)
{
$this->model = $model;
$this->hasher = $hasher;
}
/**
* Retrieve a user by their unique identifier.
*
* @param mixed $identifier
* @return \Illuminate\Contracts\Auth\Authenticatable|null
*/
public function retrieveById($identifier)
{
return $this->createModel()->newQuery()->find($identifier);
}
...
/**
* Retrieve a user by the given credentials.
*
* @param array $credentials
* @return \Illuminate\Contracts\Auth\Authenticatable|null
*/
public function retrieveByCredentials(array $credentials)
{
if (empty($credentials)) {
return;
}
// First we will add each credential element to the query as a where clause.
// Then we can execute the query and, if we found a user, return it in a
// Eloquent User "model" that will be utilized by the Guard instances.
$query = $this->createModel()->newQuery();
foreach ($credentials as $key => $value) {
if (! Str::contains($key, 'password')) {
$query->where($key, $value);
}
}
return $query->first();
}
...
}
实现代码
因为我们是需要在当前的Auth验证基础之上添加一层Redis缓存，所以最简单的办法继承EloquentUserProvider类，重写
retrieveByCredentials方法所以我们新建RedisUserProvider.php文件
<?php
namespace App\Providers;
use Illuminate\Auth\EloquentUserProvider;
use Cache;
class RedisUserProvider extends EloquentUserProvider
{
public function __construct($hasher, $model)
{
parent::__construct($hasher, $model);
}
/**
* Retrieve a user by the given credentials.
*
* @param array $credentials
* @return \Illuminate\Contracts\Auth\Authenticatable|null
*/
public function retrieveByCredentials(array $credentials)
{
if (!isset($credentials['token'])) {
return;
}
$token = $credentials['token'];
$redis = Cache::getRedis();
$userId = $redis->get($token);
return $this->retrieveById($userId);
}
}
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