Wechat\CacheDriver\FileDriver

Complexity

Total Complexity

10

Size/Duplication

Total Lines	89
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Importance

Changes

0

5 Methods

Rating	Name	Duplication	Size	Complexity
A	_get()	0	18	3
A	_set()	0	7	1
A	packData()	0	9	2
A	unpackData()	0	10	3
A	createFileName()	0	4	1

<?php

namespace Wechat\CacheDriver;

use Wechat\CacheDriver\BaseDriver;

/**
 * 文件缓存驱动.
 *
 */
class FileDriver extends BaseDriver
{
    /**
     * @param string $name
     *
     * @return bool|null|string|void
     */
    public function _get($name)
    {
        $name = $this->createFileName($name);
        $file = $this->cacheDir . '/' . $name;
        $data = @file_get_contents($file);
        if (!$data) {
            return false;
        }

        $data = $this->unpackData($data);
        if (false === $data) {
            @unlink($file);

It seems like you do not handle an error condition here. This can introduce security issues, and is generally not recommended.

            $data = null;
        }

        return $data;
    }

    /**
     * 根据缓存名 设置缓存值和超时时间.
     *
     * @param string $name    缓存名
     * @param void   $value   缓存值
     * @param int    $expires 超时时间
     *
     * @return boolean;

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     */
    public function _set($name, $value, $expires)
    {
        $name = $this->createFileName($name);
        $data = $this->packData($value, $expires);

        return file_put_contents($this->cacheDir . '/' . $name, $data);
    }

    /**
     * 数据打包.
     *
     * @param void $data    缓存值
     * @param int  $expires 超时时间
     *
     * @return string
     */
    private function packData($data, $expires)
    {
        $str            = [];
        $str['data']    = $data;
        $str['expires'] = $expires === 0 ? 0 : time() + $expires;
        $str            = serialize($str);

        return $str;
    }

    /**
     * @param $data
     *
     * @return bool
     */
    private function unpackData($data)
    {
        $arr = unserialize($data);

        if (time() > $arr['expires'] && $arr['expires'] !== 0) {
            return false;
        }

        return $arr['data'];
    }

    /**
     * 创建缓存文件名.
     *
     * @param string $name 缓存名
     *
     * @return string
     */
    private function createFileName($name)
    {
        return md5($name);
    }
}