所以我制作了这个上传脚本,为了让它更安全,我正在找出每个文件的类型。
但是,由于某种原因,文件类型正在回显给我!例如:
图像/JPEG;charset=binary 请只上传 SWF 文件!
上传成功时,回显的字符串看起来相同。
编码:
<?php session_start();
defined('IN_SCRIPT') ? NULL : define('IN_SCRIPT', NULL);
require_once 'inc/db_connect.php';
require_once 'styles/import.php';
$style = new style_class(NULL);
if(!isset($_FILES['file']['tmp_name']) || empty($_FILES['file']['tmp_name'])) die($style->upload_no_parameter());
$filetype = system('file -bi '.$_FILES['file']['tmp_name']);
$filetype = explode(';', $filetype, 1);
if ($filetype[0] != 'application/x-shockwave-flash; charset=binary') die($style->upload_wrong_format());
$sha256 = hash_file("sha256", $_FILES['file']['tmp_name']);
$query = $db->prepare('SELECT id FROM swf WHERE hash = :hash');
$result = $query->execute(array(':hash'=>$sha256));
if ($query->rowCount() != 0) die($style->upload_duplicate());
$query = $db->query('SELECT * FROM swf ORDER BY id DESC LIMIT 1;');
$name = $query->fetch(PDO::FETCH_ASSOC);
$new_name = 'uploads/'.($name['id']+1).'.swf';
if(move_uploaded_file($_FILES['file']['tmp_name'], $new_name)) {
$query = $db->prepare('INSERT INTO swf (uploader, upload_time, hash) VALUES (:id, NOW(), :hash);');
$query->execute(array(':id' => $_SESSION['id'], ':hash'=> $sha256));
echo $style->upload_success();
}
else
echo $style->upload_fail();
?>
我不明白为什么脚本会做这样的回声......
谢谢!
编辑:
style_class 是我看的第一个地方。此类包含主要返回 HTML 文本的函数。整个类是从数据库自动生成的。
我在这里从生成的文件中复制了 upload_*,所以你可以看到:
class style_class{
function upload_no_parameter(){
echo "<b>All parameters must be set!</b>";
}
function upload_fail(){
echo "<b>There was an error, please try again.</b>";
}
function upload_success(){
echo "<b>Your SWF has been uploaded!</b>";
}
function upload_duplicate(){
echo "<b>File already exists!</b>";
}
function upload_wrong_format(){
echo "<b>Please upload only SWF files!</b>";
}
}
谢谢!