下载流媒体不返回真实文件。错误的内容类型或哑剧？

Question

一个Python应用程序说我通过PHP流处理器流式传输的zip文件不是zip文件。但是，winrar 打开它们没有任何问题。

这是它发送的标头：

Content-disposition: filename=example.zip
Content-type: application/zip; charset=binary

我需要更多/不同的标头吗？

下面是代码：

<?php
session_start();
if(!$_SESSION['directory']){
    print "Sorry, only logged in users can view downloads";
    exit;
};
?>
<?php
$hidden_file_directory = "download/".$_SESSION['directory']; //Name of the directory where all the sub directories and files exists
$file_path = $_GET['file']; //Get the file from URL variable
$real_file_path = realpath("$hidden_file_directory/$file_path"); //Set the file path w.r.t the download.php... It may be different for u
$filename = basename($real_file_path);
if(dirname($real_file_path) != getcwd() ."/". $hidden_file_directory)
    die("File does not exist.");
if(file_exists($real_file_path)) {
    $content_type = get_mime($real_file_path);
    header("Content-disposition: filename=$filename"); //Tell the filename to the browser
    header("Content-type: $content_type"); //Stream as a binary file! So it would force browser to download
    readfile($real_file_path); //Read and stream the file
}
else {
    echo "File does not exist.";
}

function get_mime($filename) {
    $mime_types = array(
        'txt' => 'text/plain',
        'htm' => 'text/html',
        'html' => 'text/html',
        'php' => 'text/html',
        'css' => 'text/css',
        'js' => 'application/javascript',
        'json' => 'application/json',
        'xml' => 'application/xml',
        'swf' => 'application/x-shockwave-flash',
        'flv' => 'video/x-flv',
        // images
        'png' => 'image/png',
        'jpe' => 'image/jpeg',
        'jpeg' => 'image/jpeg',
        'jpg' => 'image/jpeg',
        'gif' => 'image/gif',
        'bmp' => 'image/bmp',
        'ico' => 'image/vnd.microsoft.icon',
        'tiff' => 'image/tiff',
        'tif' => 'image/tiff',
        'svg' => 'image/svg+xml',
        'svgz' => 'image/svg+xml',
        // archives
        'zip' => 'application/zip',
        'rar' => 'application/x-rar-compressed',
        'exe' => 'application/x-msdownload',
        'msi' => 'application/x-msdownload',
        'cab' => 'application/vnd.ms-cab-compressed',
        // audio/video
        'mp3' => 'audio/mpeg',
        'qt' => 'video/quicktime',
        'mov' => 'video/quicktime',
        // adobe
        'pdf' => 'application/pdf',
        'psd' => 'image/vnd.adobe.photoshop',
        'ai' => 'application/postscript',
        'eps' => 'application/postscript',
        'ps' => 'application/postscript',
        // ms office
        'doc' => 'application/msword',
        'rtf' => 'application/rtf',
        'xls' => 'application/vnd.ms-excel',
        'ppt' => 'application/vnd.ms-powerpoint',
        // open office
        'odt' => 'application/vnd.oasis.opendocument.text',
        'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
    );
    $ext = strtolower(array_pop(explode('.',$filename)));
    if (array_key_exists($ext, $mime_types)) {
        return $mime_types[$ext];
    }
    elseif (function_exists('finfo_open')) {
        $finfo = finfo_open(FILEINFO_MIME);
        $mimetype = finfo_file($finfo, $filename);
        finfo_close($finfo);
        return $mimetype;
    }
    else {
        return 'application/octet-stream';
    }
}

?>

编辑 - 我添加了：

if(dirname($real_file_path) != getcwd() ."/". $hidden_file_directory)
    die("File does not exist.");

当那些指出不安全感的人。希望这将足够安全。

Answer 1

我注意到有些浏览器需要将文件名双引号，或者他们不知道它是什么，也许 python 也会这样做。尝试发送

 header("Content-disposition: filename="$filename"");

你确定它是事实application/zip而不是application/x-zip-compressed吗？

附带说明：您使用的是直接从查询字符串中使用的文件名。如果我将文件名作为file=............systemdirconfig.xml发送怎么办？也许您应该添加一些检查。basename（） 就像你使用下一步一样可能是个好主意。