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Better upload handling (don't move file before handling it)

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This commit is contained in:
Michael Save 2012-03-18 19:53:56 +11:00
parent fb5fc04599
commit c136d44894
2 changed files with 32 additions and 16 deletions
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20
inc/image.php
View File

@ -216,8 +216,7 @@
public function init() {
global $config;
$this->temp = tempnam($config['tmp'], 'imagick');
$this->temp = false;
}
public function from() {
$size = trim(shell_exec('identify -format "%w %h" ' . escapeshellarg($this->src . '[0]')));
@ -232,8 +231,13 @@
}
}
public function to($src) {
rename($this->temp, $src);
chmod($src, 0664);
if(!$this->temp) {
// $config['redraw_image']
shell_exec('convert ' . escapeshellarg($this->src) . ' ' . escapeshellarg($src));
} else {
rename($this->temp, $src);
chmod($src, 0664);
}
}
public function width() {
return $this->width;
@ -243,10 +247,18 @@
}
public function destroy() {
@unlink($this->temp);
$this->temp = false;
}
public function resize() {
global $config;
if($this->temp) {
// remove old
$this->destroy();
}
$this->temp = tempnam($config['tmp'], 'imagick');
$quality = $config['thumb_quality'] * 10;
if(shell_exec("convert -flatten -filter Point -scale {$this->width}x{$this->height} +antialias -quality {$quality} " . escapeshellarg($this->src . '[0]') . " " . escapeshellarg($this->temp)) || !file_exists($this->temp))

28
post.php
View File

@ -455,15 +455,18 @@
// Truncate filename if it is too long
$post['filename'] = substr($post['filename'], 0, $config['max_filename_len']);
// Move the uploaded file
if(!@move_uploaded_file($_FILES['file']['tmp_name'], $post['file'])) error($config['error']['nomove']);
$post['filehash'] = $config['file_hash']($post['file']);
$post['filesize'] = filesize($post['file']);
$upload = $_FILES['file']['tmp_name'];
if(!is_readable($upload))
error($config['error']['nomove']);
$post['filehash'] = $config['file_hash']($upload);
$post['filesize'] = filesize($upload);
if($is_an_image) {
// Check IE MIME type detection XSS exploit
$buffer = file_get_contents($post['file'], null, null, null, 255);
$buffer = file_get_contents($upload, null, null, null, 255);
if(preg_match($config['ie_mime_type_detection'], $buffer)) {
undoImage($post);
error($config['error']['mime_exploit']);
@ -482,9 +485,9 @@
// PHP's memory limit.
// first try GD's getimagesize()
if($size = @getimagesize($post['file'])) {
if($size = @getimagesize($upload)) {
if($size[0] > $config['max_width'] || $size[1] > $config['max_height']) {
file_unlink($post['file']);
error($config['error']['maxsize']);
}
} else {
@ -493,18 +496,16 @@
}
} else {
// find dimensions of an image using GD
if(!$size = @getimagesize($post['file'])) {
file_unlink($post['file']);
if(!$size = @getimagesize($upload)) {
error($config['error']['invalidimg']);
}
if($size[0] > $config['max_width'] || $size[1] > $config['max_height']) {
file_unlink($post['file']);
error($config['error']['maxsize']);
}
}
// create image object
$image = new Image($post['file'], $post['extension']);
$image = new Image($upload, $post['extension']);
if($image->size->width > $config['max_width'] || $image->size->height > $config['max_height']) {
$image->delete();
@ -526,7 +527,7 @@
$post['extension'] == ($config['thumb_ext'] ? $config['thumb_ext'] : $post['extension'])) {
// Copy, because there's nothing to resize
copy($post['file'], $post['thumb']);
copy($upload, $post['thumb']);
$post['thumbwidth'] = $image->size->width;
$post['thumbheight'] = $image->size->height;
@ -547,6 +548,9 @@
if($config['redraw_image']) {
$image->to($post['file']);
} else {
if(!@move_uploaded_file($_FILES['file']['tmp_name'], $post['file']))
error($config['error']['nomove']);
}
$image->destroy();