vendor/topthink/framework/src/think/Middleware.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2021 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: Slince <taosikai@yeah.net>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace think;

use Closure;
use InvalidArgumentException;
use LogicException;
use think\exception\Handle;
use Throwable;

/**
 * 中间件管理类
 * @package think
 */
class Middleware
{
    /**
     * 中间件执行队列
     * @var array
     */
    protected $queue = [];

    /**
     * 应用对象
     * @var App
     */
    protected $app;

    public function __construct(App $app)
    {
        $this->app = $app;
    }

    /**
     * 导入中间件
     * @access public
     * @param array  $middlewares
     * @param string $type 中间件类型
     * @return void
     */
    public function import(array $middlewares = [], string $type = 'global'): void
    {
        foreach ($middlewares as $middleware) {
            $this->add($middleware, $type);
        }
    }

    /**
     * 注册中间件
     * @access public