PHPの書く資源は盗難防止チェーン類をダウンロードして分かち合います

ここ数日PHP盗難防止チェーンの外部資源ダウンロード処理関数を書いています.昨日の夜、作成が終わったばかりで、途中でいくつかの問題に遭遇しました.ここでは詳しく説明しません.以下は自作の簡単なPHP盗難防止チェーン処理類(後で改善するためにクラスファイルに再整理して作成する);

 
  
/** 
  
 * 
  
 *              
  
 * 
  
 * @link   http://jb51.net 
  
 * 
  
 */ 
  
class BurglarDow{ 
  
 /** 
  
     *          
  
     * @var    allow 
  
     * @access private 
  
     */ 
  
 private $allow      =  false; 
  
 /** 
  
     *        
  
     * @var    dowUrl 
  
     * @access private 
  
     */ 
  
 private $dowUrl     =  null; 
  
 /** 
  
     *        
  
     * @var    RemoteUrl 
  
     * @access private 
  
     */ 
  
 private $RemoteUrl  =  null; 
  
 /** 
  
     *              
  
     * @var    allowUrl 
  
     * @access private 
  
     */ 
  
 private $allowUrl   =  array(); 
  
 /** 
  
     *        
  
     * @var    Location 
  
     * @access private 
  
     */ 
  
 private $Location   =  null; 
   
  
 public function __construct($dowUrl,$Location,array $allowUrl){
  //       
  $this->dowUrl   = $dowUrl;
  //             
  $this->allowUrl = $allowUrl;
  //       
  $this->Location = $Location;
 
  
  $this->RemoteUrl = @parse_url($_SERVER['HTTP_REFERER']);                                                      //       
  if(!is_array($this->RemoteUrl))
   header("HTTP/1.1 301 Moved Permanently");
   header("Location: ".$this->Location);
 
  
  if(isset($this->RemoteUrl['host'])){
   if(in_array($this->RemoteUrl['host'],$this->allowUrl)){                                                   //           
    $this->allow  = true;                                                                                 //        ： 
   }
  }
  unset($this->allowUrl,$this->RemoteUrl);                                                                      //       
 }
 
  
 /**
  *        
  * @access public
  * @return mixed
  */
 public function dow(){
  $FileInfo = get_headers($this->dowUrl,1);                                                                     //           
 
  
  if(true === $this->allow){                                                                                    //           
   //          
   if(is_file('Config.ini')){
    $FileCon = parse_ini_file('Config.ini');
   }else{
    $FileName   =  basename($FileInfo['Content-Location']);
    $FileConStr = "FileName  = {$FileName}\r
FileUrl   = {$FileInfo['Content-Location']}\r
FileSize   = {$FileInfo['Content-Length']}";
    $handle = fopen ('Config.ini', "wb");                                                                 // Config.ini          
    if (fwrite ($handle, $FileConStr) == FALSE) {                                                         //        
     echo "File creation failed ..."; 
    }
    fclose ($handle);                                                                                     //             
    $FileCon = parse_ini_file('Config.ini');
   }
   if(!empty($$this->dowUrl)){
    $fp = @fopen($$this->dowUrl, "rb");                                                                   //          
    if (!$fp)
      exit("Download a mistake.

");
 
  
    //       
    header("Content-type:text/html;charset=utf-8");
    header('Content-Description: File Transfer');
    header('Content-Type: application/octet-stream');
    header('Content-Disposition: attachment; filename='.$FileCon['FileName']);
    header("Accept-Ranges: bytes");
    header('Content-Transfer-Encoding: binary');
    header('Expires: 0');
    header('Cache-Control:must-revalidate,post-check=0,pre-check=0');
    header('Pragma: public');
    header('Content-Length: '.$FileCon['FileSize']);
    while (!feof($fp)){
     set_time_limit(0);                                                                                 //           
     echo fread($fp, 1024);                                                                             //     
     flush();                                                                                           //     
     ob_flush();                                                                                        //          
    }
    fclose($fp);
   }else{
    header("HTTP/1.1 404 Not Found");
   }
  }else{
   header("HTTP/1.1 301 Moved Permanently");
   header("Location: ".$this->Location);
  }
 }
}
//       
$dowUrl = 'http://dldir1.qq.com/qqfile/qq/QQ5.1/10055/QQ5.1.exe';
//     
$Location = 'http://jb51.net';
//         
$allowUrl = array(
 'jb51.net',
);
$BurglarDow = new BurglarDow($dowUrl,$Location,$allowUrl);
$BurglarDow -> dow();