71 lines
1.8 KiB
PHP
71 lines
1.8 KiB
PHP
<?php
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// +----------------------------------------------------------------------
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// | CatchAdmin [Just Like ～ ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2017~2020 http://catchadmin.com All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( https://github.com/yanwenwu/catch-admin/blob/master/LICENSE.txt )
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// +----------------------------------------------------------------------
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// | Author: JaguarJack [ njphper@gmail.com ]
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// +----------------------------------------------------------------------
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namespace catcher\library\rate;
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use catcher\exceptions\FailedException;
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/**
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* 滑动窗口
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*
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* Class SlidingWindowLimit
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* @package catcher\library\rate
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*/
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class SlidingWindowLimit
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{
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use Redis;
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protected $key;
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protected $limit = 10;
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/**
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* @var int
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*/
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protected $window = 5;
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public function __construct($key)
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{
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$this->key = $key;
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}
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public function overflow()
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{
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$now = microtime(true) * 1000;
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$redis = $this->getRedis();
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// 开启管道
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$redis->pipeline();
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// 去除非窗口内的元素
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$redis->zremrangeByScore($this->key, 0, $now - $this->window*1000);
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// 获取集合内的所有元素数目
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$redis->zcard($this->key);
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// 增加元素
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$redis->zadd($this->key, $now, $now);
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// 设置过期
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$redis->expire($this->key, $this->window);
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// 执行管道内命令
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$res = $redis->exec();
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if ($res[1] > $this->limit) {
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throw new FailedException('访问限制');
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}
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return true;
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}
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public function setWindow($time)
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{
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$this->window = $time;
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return $this;
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}
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} |