来自任何页面的Forcedownload文件!检查文件是否is_readable?

时间:2010-09-03 00:57:20

标签: php download

我想用我的forcedownload脚本从任何网站下载任何文件。简单的脚本,它只是提示下载窗口将文件保存到桌面。我只是将?path = http://www.google.com/images/whatever/file.jpg传递给url,脚本会触发下载。

但是,此脚本当然不适用于每个页面。大多数时候我没有权限这样做!

  

HTTP请求失败! HTTP / 1.0 403禁止进入....

是否有一种方法可以检查来自某个域的forcedownload是否有效。 像is_readable()或者其他东西。

关于亚光

编辑:

    <?php
    error_reporting(E_ALL);

    if(isset($_GET['p'])) $path = $_GET['p'];
    else header('Location:' . 'mypage');

    $file = $path;
    //header('Location:' . $file);
    //
    header("Cache-Control: no-cache");
    header("Expires: -1");
    header("Content-Type: application/octet-stream;");
    header("Content-Disposition: attachment; filename=\"" . basename($file) . "\";");
    header("Content-Transfer-Encoding: binary");
    //header("Content-Length: " . filesize($file));
    //echo file_get_contents($file);
    echo readfile($file);
    ?>

2 个答案:

答案 0 :(得分:3)

如果您的脚本使用curl下载文件,您可以使用curl_getinfo并在将文件传递给用户之前检查CURLINFO_HTTP_CODE。

答案 1 :(得分:1)

我为我的mediawiki字数统计项目创建了这个类。

// Copyright PHPExperts.pro
// License: Any user on Stackflow may use this code under the BSD License.

/**
* Web page datatype that holds all the various parts
* and info about a web page.
*/
class WebPage
{
    public $url;
    public $headers;
    public $body;
    public $text;


    public function __construct($url)
    {
        // 1. Bail out now if the CURL extension is not loaded.
        if (!in_array('curl', get_loaded_extensions()))
        {
            throw new Exception(WebPageException::MISSING_CURL);
        }

        // 2. Make sure the URL is valid.
        self::ensureValidURL($url);

        // 3. Store the URL.
        $this->url = $url;
    }

    /**
    * Determine if a URL is valid.
    *
    * @param string $url
    * @returns true if the URL is a string and is a valid URL. False, otherwise.
    */
    public static function isURLValid($url)
    {
        return (is_string($url) &&
                filter_var($url, FILTER_VALIDATE_URL) !== false);
    }

    public static function ensureValidURL($url)
    {
        if (!self::isURLValid($url))
        {
            throw new WebPageException(WebPageException::INVALID_URL, array($url));
        }
    }

    // captureHeader() donated by bendavis78@gmail.com,
    // via http://us.php.net/curl_setopt_array
    private function captureHeader($ch, $header)
    {
        $this->headers[] = $header;
        return strlen($header);
    }

    public function fetchURL()
    {
        $ch = curl_init();
        curl_setopt_array($ch, array(CURLOPT_URL => $this->url,
                                     CURLOPT_RETURNTRANSFER => 1,
                                     CURLOPT_HEADERFUNCTION => array($this, 'captureHeader'),
                                     CURLOPT_TIMEOUT => 5,
                                     )
                         );

        $data = curl_exec($ch);
        curl_close($ch);

        if ($data === false || is_null($data) || $data == '')
        {
            throw new WebPageException(WebPageException::BLANK_URL, array($this->url));

        }

        // TODO: Need to handle HTTP error messages, such as 404 and 502.
        $this->body = $data;
                // Uses code from php@wizap.dom
                $this->text = remove_HTML($data);
    }
}

运行WebPage::captureHeader()后,您只需通过$this->headers进行操作,如果您没有找到HTTP / 1.0 403 Forbidden,那么您就可以了。

这完全回答了你的问题,所以我希望能够获得荣誉。