PHP写的资源下载防盗链类分享
这篇文章主要介绍了PHP写的资源下载防盗链类分享,需要的朋友可以参考下
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);
<?php /** * * 防盗链外部资源下载处理类 * * @link http://jb51.net * */ class BurglarDow{ /** * 初始许可下载状态 * @var allow * @access private */ private $allow = false; /** * 初始下载地址 * @var dowUrl * @access private */ private $dowUrl = null; /** * 初始来路域名 * @var RemoteUrl * @access private */ private $RemoteUrl = null; /** * 初始许可资源取用域名列表 * @var allowUrl * @access private */ private $allowUrl = array(); /** * 初始转跳地址 * @var Location * @access private */ private $Location = null;public function __construct($dowUrl,$Location,array $allowUrl){ // 初始下载地址 $this->dowUrl = $dowUrl; // 初始许可资源取用域名列表 $this->allowUrl = $allowUrl; // 初始转跳地址 $this->Location = $Location;
$this->RemoteUrl = @parse_url($_SERVER['HTTP_REFERER']); // 获取来路域名 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)){ // 判断是否来至许可域名 $this->allow = true; // 下载许可状态为:真 } } unset($this->allowUrl,$this->RemoteUrl); // 释放内存变量 }
/** * 防盗链资源下载 * @access public * @return mixed */ public function dow(){ $FileInfo = get_headers($this->dowUrl,1); // 获取远程文件头部信息
if(true === $this->allow){ // 判断是否许可下载资源 //判断配置文件是否存在 if(is_file('Config.ini')){ $FileCon = parse_ini_file('Config.ini'); }else{ $FileName = basename($FileInfo['Content-Location']); $FileConStr = "FileName = {$FileName}\r\nFileUrl = {$FileInfo['Content-Location']}\r\nFileSize = {$FileInfo['Content-Length']}"; $handle = fopen ('Config.ini', "wb"); // Config.ini文件不存在则创建文件 if (fwrite ($handle, $FileConStr) == FALSE) { // 数据写入文件 echo "File creation failed ..."; } fclose ($handle); // 关闭一个已打开的文件指针 $FileCon = parse_ini_file('Config.ini'); } if(!empty($$this->dowUrl)){ $fp = @fopen($$this->dowUrl, "rb"); // 二进制模式读取文件 if (!$fp) exit("Download a mistake.\n\n");
// 输出远程资源 header("Content-type:text/html;charset=utf-8"); header('Content-Description: File Transfer'); header('Content-Type: application/octet-stream'); header('Content-Disposition: attachment; filename='.$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); // 设置文件最长执行时间 echo fread($fp, 1024); // 输出文件 flush(); // 输出缓冲 ob_flush(); // 输出缓冲区中的内容 } fclose($fp); }else{ header("HTTP/1.1 404 Not Found"); } }else{ header("HTTP/1.1 301 Moved Permanently"); header("Location: ".$this->Location); } } } // 远程资源地址 $dowUrl = 'http://dldir1.qq.com/qqfile/qq/QQ5.1/10055/QQ5.1.exe'; // 转跳地址 $Location = 'http://jb51.net'; // 许可来路域名列表 $allowUrl = array( 'jb51.net', ); $BurglarDow = new BurglarDow($dowUrl,$Location,$allowUrl); $BurglarDow -> dow();