<?php
error_reporting(E_ALL | E_STRICT);
$script_dir = dirname(__FILE__);
$script_dir_url = dirname($_SERVER['PHP_SELF']);
$options = array(
'upload_dir' => $script_dir.'/files/',
'upload_url' => $script_dir_url.'/files/',
'thumbnails_dir' => $script_dir.'/thumbnails/',
'thumbnails_url' => $script_dir_url.'/thumbnails/',
'thumbnail_max_width' => 80,
'thumbnail_max_height' => 80,
'field_name' => 'file'
);
class UploadHandler
{
private $upload_dir;
private $upload_url;
private $thumbnails_dir;
private $thumbnails_url;
private $thumbnail_max_width;
private $thumbnail_max_height;
private $field_name;
function __construct($options) {
$this->upload_dir = $options['upload_dir'];
$this->upload_url = $options['upload_url'];
$this->thumbnails_dir = $options['thumbnails_dir'];
$this->thumbnails_url = $options['thumbnails_url'];
$this->thumbnail_max_width = $options['thumbnail_max_width'];
$this->thumbnail_max_height = $options['thumbnail_max_height'];
$this->field_name = $options['field_name'];
}
private function get_file_object($file_name) {
$file_path = $this->upload_dir.$file_name;
if (is_file($file_path) && $file_name[0] !== '.') {
$file = new stdClass();
$file->name = $file_name;
$file->size = filesize($file_path);
$file->url = $this->upload_url.rawurlencode($file->name);
$file->thumbnail = is_file($this->thumbnails_dir.$file_name) ?
$this->thumbnails_url.rawurlencode($file->name) : null;
return $file;
}
return null;
}
private function create_thumbnail($file_name) {
$file_path = $this->upload_dir.$file_name;
$thumbnail_path = $this->thumbnails_dir.$file_name;
list($img_width, $img_height) = @getimagesize($file_path);
if (!$img_width || !$img_height) {
return false;
}
$scale = min(
$this->thumbnail_max_width / $img_width,
$this->thumbnail_max_height / $img_height
);
if ($scale > 1) {
$scale = 1;
}
$thumbnail_width = $img_width * $scale;
$thumbnail_height = $img_height * $scale;
$thumbnail_img = @imagecreatetruecolor($thumbnail_width, $thumbnail_height);
switch (strtolower(substr(strrchr($file_name, '.'), 1))) {
case 'jpg':
case 'jpeg':
$src_img = @imagecreatefromjpeg($file_path);
$write_thumbnail = 'imagejpeg';
break;
case 'gif':
$src_img = @imagecreatefromgif($file_path);
$write_thumbnail = 'imagegif';
break;
case 'png':
$src_img = @imagecreatefrompng($file_path);
$write_thumbnail = 'imagepng';
break;
default:
$src_img = $write_thumbnail = null;
}
$success = $src_img && @imagecopyresampled(
$thumbnail_img,
$src_img,
0, 0, 0, 0,
$thumbnail_width,
$thumbnail_height,
$img_width,
$img_height
) && $write_thumbnail($thumbnail_img, $thumbnail_path);
// Free up memory (imagedestroy does not delete files):
@imagedestroy($src_img);
@imagedestroy($thumbnail_img);
return $success;
}
private function handle_file_upload($uploaded_file, $name, $size, $type, $error) {
$file = new stdClass();
$file->name = basename(stripslashes($name));
$file->size = intval($size);
$file->type = $type;
if (!$error && $file->name) {
if ($file->name[0] === '.') {
$file->name = substr($file->name, 1);
}
$file_path = $this->upload_dir.$file->name;
$append_file = is_file($file_path) && $file->size > filesize($file_path);
clearstatcache();
if ($uploaded_file && is_uploaded_file($uploaded_file)) {
// multipart/formdata uploads (POST method uploads)
if ($append_file) {
file_put_contents(
$file_path,
fopen($uploaded_file, 'r'),
FILE_APPEND
);
} else {
move_uploaded_file($uploaded_file, $file_path);
}
} else {
// Non-multipart uploads (PUT method support)
file_put_contents(
$file_path,
fopen('php://input', 'r'),
$append_file ? FILE_APPEND : 0
);
}
$file_size = filesize($file_path);
if ($file_size === $file->size) {
$file->url = $this->upload_url.rawurlencode($file->name);
$file->thumbnail = $this->create_thumbnail($file->name) ?
$this->thumbnails_url.rawurlencode($file->name) : null;
}
$file->size = $file_size;
} else {
$file->error = $error;
}
return $file;
}
public function get() {
$file_name = isset($_REQUEST['file']) ?
basename(stripslashes($_REQUEST['file'])) : null;
if ($file_name) {
$info = $this->get_file_object($file_name);
} else {
$info = array_values(array_filter(array_map(
array($this, 'get_file_object'),
scandir($this->upload_dir)
)));
}
header('Cache-Control: no-cache, must-revalidate');
header('Content-type: application/json');
echo json_encode($info);
}
public function post() {
$upload = isset($_FILES[$this->field_name]) ?
$_FILES[$this->field_name] : array(
'tmp_name' => null,
'name' => null,
'size' => null,
'type' => null,
'error' => null
);
if (is_array($upload['tmp_name']) && count($upload['tmp_name']) > 1) {
$info = array();
foreach ($upload['tmp_name'] as $index => $value) {
$info[] = $this->handle_file_upload(
$upload['tmp_name'][$index],
$upload['name'][$index],
$upload['size'][$index],
$upload['type'][$index],
$upload['error'][$index]
);
}
} else {
if (is_array($upload['tmp_name'])) {
$upload = array(
'tmp_name' => $upload['tmp_name'][0],
'name' => $upload['name'][0],
'size' => $upload['size'][0],
'type' => $upload['type'][0],
'error' => $upload['error'][0]
);
}
$info = $this->handle_file_upload(
$upload['tmp_name'],
isset($_SERVER['HTTP_X_FILE_NAME']) ?
$_SERVER['HTTP_X_FILE_NAME'] : $upload['name'],
isset($_SERVER['HTTP_X_FILE_SIZE']) ?
$_SERVER['HTTP_X_FILE_SIZE'] : $upload['size'],
isset($_SERVER['HTTP_X_FILE_TYPE']) ?
$_SERVER['HTTP_X_FILE_TYPE'] : $upload['type'],
$upload['error']
);
}
if (isset($_SERVER['HTTP_X_REQUESTED_WITH']) &&
$_SERVER['HTTP_X_REQUESTED_WITH'] === 'XMLHttpRequest') {
header('Content-type: application/json');
} else {
header('Content-type: text/plain');
}
echo json_encode($info);
}
public function delete() {
$file_name = isset($_REQUEST['file']) ?
basename(stripslashes($_REQUEST['file'])) : null;
$file_path = $this->upload_dir.$file_name;
$thumbnail_path = $this->thumbnails_dir.$file_name;
$success = is_file($file_path) && $file_name[0] !== '.' && unlink($file_path);
if ($success && is_file($thumbnail_path)) {
unlink($thumbnail_path);
}
header('Content-type: application/json');
echo json_encode($success);
}
}
$upload_handler = new UploadHandler($options);
switch ($_SERVER['REQUEST_METHOD']) {
case 'HEAD':
case 'GET':
$upload_handler->get();
break;
case 'POST':
$upload_handler->post();
break;
case 'DELETE':
$upload_handler->delete();
break;
default:
header('HTTP/1.0 405 Method Not Allowed');
}
?>
