PHP文件与图片防盗链处理类

防盗链就是对一些文件资源进行包装了，这样对方是看不到我们文件源地址了，下载是也是php文件打开了，下载成功之后就成了要下载的文件了，下面我来给各位分享一站长写的类。

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悲剧，刚提交的既然服务器挂了没成功，又得重写....

这几天在写一个PHP防盗链外部资源下载处理函数，昨天晚上刚完成编写，中间遇到了些问题，这里就不详述了；

以下是自写的简单的PHP防盗链处理类(重新整理编写成类文件，以便后期改进)；

代码如下

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002 /**  003  *  004  * 防盗链外部资源下载处理类  005  *   006  * @author 清风   007  * @link   http://blog.emtalk.net  008  *   009  */ 010 class BurglarDow{  011     /**  012      * 初始许可下载状态  013      * @var    allow  014      * @access private  015      */ 016     private $allow      =  false;  017     /**  018      * 初始下载地址  019      * @var    dowUrl  020      * @access private  021      */ 022     private $dowUrl     =  null;  023     /**  024      * 初始来路域名  025      * @var    RemoteUrl  026      * @access private  027      */ 028     private $RemoteUrl  =  null;  029     /**  030      * 初始许可资源取用域名列表  031      * @var    allowUrl  032      * @access private  033      */ 034     private $allowUrl   =  array();  035     /**  036      * 初始转跳地址  037      * @var    Location  038      * @access private  039      */ 040     private $Location   =  null;  041    042     public function __construct($dowUrl,$Location,array $allowUrl){  043         // 初始下载地址  044         $this->dowUrl   = $dowUrl;  045         // 初始许可资源取用域名列表  046         $this->allowUrl = $allowUrl;  047         // 初始转跳地址  048         $this->Location = $Location;  049    050         $this->RemoteUrl = @parse_url($_SERVER['HTTP_REFERER']);                                                      // 获取来路域名  051         if(!is_array($this->RemoteUrl))  052             header("HTTP/1.1 301 Moved Permanently");  053             header("Location: ".$this->Location);  054    055         if(isset($this->RemoteUrl['host'])){  056             if(in_array($this->RemoteUrl['host'],$this->allowUrl)){                                                   // 判断是否来至许可域名  057                 $this->allow  = true;                                                                                 // 下载许可状态为：真  058             }  059         }  060         unset($this->allowUrl,$this->RemoteUrl);                                                                      // 释放内存变量  061     }  062    063     /**  064      * 防盗链资源下载  065      * @access public  066      * @return mixed  067      */ 068     public function dow(){  069         $FileInfo = get_headers($this->dowUrl,1);                                                                     // 获取远程文件头部信息  070    071         if(true === $this->allow){                                                                                    // 判断是否许可下载资源  072             //判断配置文件是否存在  073             if(is_file('Config.ini')){  074                 $FileCon = parse_ini_file('Config.ini');  075             }else{  076                 $FileName   =  basename($FileInfo['Content-Location']);  077                 $FileConStr = "FileName  = {$FileName}rnFileUrl   = {$FileInfo['Content-Location']}rnFileSize   = {$FileInfo['Content-Length']}";  078                 $handle = fopen ('Config.ini', "wb");                                                                 // Config.ini文件不存在则创建文件  079                 if (fwrite ($handle, $FileConStr) == FALSE) {                                                         // 数据写入文件   080                     echo "File creation failed ...";   081                 }  082                 fclose ($handle);                                                                                     // 关闭一个已打开的文件指针  083                 $FileCon = parse_ini_file('Config.ini');  084             }  085             if(!empty($$this->dowUrl)){  086                 $fp = @fopen($$this->dowUrl, "rb");                                                                   // 二进制模式读取文件  087                 if (!$fp)  088                      exit("Download a mistake.nn");  089    090                 // 输出远程资源  091                 header("Content-type:text/html;charset=utf-8");  092                 header('Content-Description: File Transfer');  093                 header('Content-Type: application/octet-stream');  094                 header('Content-Disposition: attachment; filename='.$FileCon['FileName']);  095                 header("Accept-Ranges: bytes");  096                 header('Content-Transfer-Encoding: binary');  097                 header('Expires: 0');  098                 header('Cache-Control:must-revalidate,post-check=0,pre-check=0');  099                 header('Pragma: public');  100                 header('Content-Length: '.$FileCon['FileSize']);  101                 while (!feof($fp)){  102                     set_time_limit(0);                                                                                 // 设置文件最长执行时间  103                     echo fread($fp, 1024);                                                                             // 输出文件  104                     flush();                                                                                           // 输出缓冲  105                     ob_flush();                                                                                        // 输出缓冲区中的内容  106                 }  107                 fclose($fp);  108             }else{  109                 header("HTTP/1.1 404 Not Found");  110             }  111         }else{  112             header("HTTP/1.1 301 Moved Permanently");  113             header("Location: ".$this->Location);  114         }  115     }  116 }  117 // 远程资源地址  118 $dowUrl = '/qq/QQ5.1/10055/QQ5.1.exe';  119 // 转跳地址  120 $Location = 'http://www.111cn.net';  121 // 许可来路域名列表  122 $allowUrl = array(  123     'blog.emtalk.net',  124 );  125 $BurglarDow = new BurglarDow($dowUrl,$Location,$allowUrl);  126 $BurglarDow -> dow();

有何不足之处，还望访友们多指点指点；