vendor/topthink/framework/src/think/middleware/CheckRequestCache.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: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace think\middleware;

use Closure;
use think\Cache;
use think\Config;
use think\Request;
use think\Response;

/**
 * 请求缓存处理
 */
class CheckRequestCache
{
    /**
     * 缓存对象
     * @var Cache
     */
    protected $cache;

    /**
     * 配置参数
     * @var array
     */
    protected $config = [
        // 请求缓存规则 true为自动规则
        'request_cache_key'    => true,
        // 请求缓存有效期
        'request_cache_expire' => null,
        // 全局请求缓存排除规则
        'request_cache_except' => [],
        // 请求缓存的Tag
        'request_cache_tag'    => '',
    ];

    public function __construct(Cache $cache, Config $config)
    {
        $this->cache  = $cache;
        $this->config = array_merge($this->config, $config->get('route'));
    }

    /**
     * 设置当前地址的请求缓存
     * @access public
     * @param Request $request
     * @param Closure $next
     * @param mixed   $cache
     * @return Response
     */