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<?php
/**
* ---------------------------------------------------------------------
*
* GLPI - Gestionnaire Libre de Parc Informatique
*
* http://glpi-project.org
*
* @copyright 2015-2023 Teclib' and contributors.
* @copyright 2003-2014 by the INDEPNET Development Team.
* @copyright 2010-2023 Sebastian Tschan.
* @licence https://www.gnu.org/licenses/gpl-3.0.html
* @link https://blueimp.net
*
* ---------------------------------------------------------------------
*
* LICENSE
*
* This file is part of GLPI.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* ---------------------------------------------------------------------
*/
/**
* @FIXME Merge this class with GLPIUploadHandler in GLPI 10.1.
* It has been added in GLPI 10.0.10 to ensure that removal of `blueimp/jquery-file-upload` library would not
* result in any BC-break for plugins.
*/
class UploadHandler
{
protected $options;
// PHP File Upload error message codes:
// https://php.net/manual/en/features.file-upload.errors.php
protected $error_messages = array(
1 => 'The uploaded file exceeds the upload_max_filesize directive in php.ini',
2 => 'The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form',
3 => 'The uploaded file was only partially uploaded',
4 => 'No file was uploaded',
6 => 'Missing a temporary folder',
7 => 'Failed to write file to disk',
8 => 'A PHP extension stopped the file upload',
'post_max_size' => 'The uploaded file exceeds the post_max_size directive in php.ini',
'max_file_size' => 'File is too big',
'min_file_size' => 'File is too small',
'accept_file_types' => 'Filetype not allowed',
'max_number_of_files' => 'Maximum number of files exceeded',
'invalid_file_type' => 'Invalid file type',
'max_width' => 'Image exceeds maximum width',
'min_width' => 'Image requires a minimum width',
'max_height' => 'Image exceeds maximum height',
'min_height' => 'Image requires a minimum height',
'abort' => 'File upload aborted',
'image_resize' => 'Failed to resize image'
);
const IMAGETYPE_GIF = 'image/gif';
const IMAGETYPE_JPEG = 'image/jpeg';
const IMAGETYPE_PNG = 'image/png';
protected $image_objects = array();
protected $response = array();
public function __construct($options = null, $initialize = false, $error_messages = null)
{
global $CFG_GLPI;
$this->options = array(
'script_url' => $this->get_full_url() . '/' . $this->basename($this->get_server_var('SCRIPT_NAME')),
'upload_dir' => GLPI_TMP_DIR . '/',
'upload_url' => $this->get_full_url() . '/files/',
'input_stream' => 'php://input',
'user_dirs' => false,
'mkdir_mode' => 0755,
'param_name' => 'files',
// Set the following option to 'POST', if your server does not support
// DELETE requests. This is a parameter sent to the client:
'delete_type' => 'DELETE',
'access_control_allow_origin' => '*',
'access_control_allow_credentials' => false,
'access_control_allow_methods' => array(
'OPTIONS',
'HEAD',
'GET',
'POST',
'PUT',
'PATCH',
'DELETE'
),
'access_control_allow_headers' => array(
'Content-Type',
'Content-Range',
'Content-Disposition'
),
// By default, allow redirects to the referer protocol+host:
'redirect_allow_target' => '/^' . preg_quote(
parse_url($this->get_server_var('HTTP_REFERER'), PHP_URL_SCHEME)
. '://'
. parse_url($this->get_server_var('HTTP_REFERER'), PHP_URL_HOST)
. '/', // Trailing slash to not match subdomains by mistake
'/' // preg_quote delimiter param
) . '/',
// Enable to provide file downloads via GET requests to the PHP script:
// 1. Set to 1 to download files via readfile method through PHP
// 2. Set to 2 to send a X-Sendfile header for lighttpd/Apache
// 3. Set to 3 to send a X-Accel-Redirect header for nginx
// If set to 2 or 3, adjust the upload_url option to the base path of
// the redirect parameter, e.g. '/files/'.
'download_via_php' => false,
// Read files in chunks to avoid memory limits when download_via_php
// is enabled, set to 0 to disable chunked reading of files:
'readfile_chunk_size' => 10 * 1024 * 1024, // 10 MiB
// Defines which files can be displayed inline when downloaded:
'inline_file_types' => '/\.(gif|jpe?g|png)$/i',
// Defines which files (based on their names) are accepted for upload.
// By default, only allows file uploads with image file extensions.
// Only change this setting after making sure that any allowed file
// types cannot be executed by the webserver in the files directory,
// e.g. PHP scripts, nor executed by the browser when downloaded,
// e.g. HTML files with embedded JavaScript code.
// Please also read the SECURITY.md document in this repository.
'accept_file_types' => DocumentType::getUploadableFilePattern(),
// Replaces dots in filenames with the given string.
// Can be disabled by setting it to false or an empty string.
// Note that this is a security feature for servers that support
// multiple file extensions, e.g. the Apache AddHandler Directive:
// https://httpd.apache.org/docs/current/mod/mod_mime.html#addhandler
// Before disabling it, make sure that files uploaded with multiple
// extensions cannot be executed by the webserver, e.g.
// "example.php.png" with embedded PHP code, nor executed by the
// browser when downloaded, e.g. "example.html.gif" with embedded
// JavaScript code.
'replace_dots_in_filenames' => false,
// The php.ini settings upload_max_filesize and post_max_size
// take precedence over the following max_file_size setting:
'max_file_size' => $CFG_GLPI['document_max_size'] * 1024 * 1024,
'min_file_size' => 1,
// The maximum number of files for the upload directory:
'max_number_of_files' => null,
// Reads first file bytes to identify and correct file extensions:
'correct_image_extensions' => false,
// Image resolution restrictions:
'max_width' => null,
'max_height' => null,
'min_width' => 1,
'min_height' => 1,
// Set the following option to false to enable resumable uploads:
'discard_aborted_uploads' => true,
'image_versions' => [],
'print_response' => true
);
if ($options) {
$this->options = $options + $this->options;
}
if ($error_messages) {
$this->error_messages = $error_messages + $this->error_messages;
}
if ($initialize) {
$this->initialize();
}
}
protected function initialize()
{
switch ($this->get_server_var('REQUEST_METHOD')) {
case 'OPTIONS':
case 'HEAD':
$this->head();
break;
case 'GET':
$this->get($this->options['print_response']);
break;
case 'PATCH':
case 'PUT':
case 'POST':
$this->post($this->options['print_response']);
break;
case 'DELETE':
$this->delete($this->options['print_response']);
break;
default:
$this->header('HTTP/1.1 405 Method Not Allowed');
}
}
protected function get_full_url()
{
$https = !empty($_SERVER['HTTPS']) && strcasecmp($_SERVER['HTTPS'], 'on') === 0 ||
!empty($_SERVER['HTTP_X_FORWARDED_PROTO']) &&
strcasecmp($_SERVER['HTTP_X_FORWARDED_PROTO'], 'https') === 0;
return
($https ? 'https://' : 'http://') .
(!empty($_SERVER['REMOTE_USER']) ? $_SERVER['REMOTE_USER'] . '@' : '') .
(isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : ($_SERVER['SERVER_NAME'] .
($https && $_SERVER['SERVER_PORT'] === 443 ||
$_SERVER['SERVER_PORT'] === 80 ? '' : ':' . $_SERVER['SERVER_PORT']))) .
substr($_SERVER['SCRIPT_NAME'], 0, strrpos($_SERVER['SCRIPT_NAME'], '/'));
}
protected function get_user_id()
{
@session_start();
return session_id();
}
protected function get_user_path()
{
if ($this->options['user_dirs']) {
return $this->get_user_id() . '/';
}
return '';
}
protected function get_upload_path($file_name = null, $version = null)
{
$file_name = $file_name ? $file_name : '';
if (empty($version)) {
$version_path = '';
} else {
$version_dir = @$this->options['image_versions'][$version]['upload_dir'];
if ($version_dir) {
return $version_dir . $this->get_user_path() . $file_name;
}
$version_path = $version . '/';
}
return $this->options['upload_dir'] . $this->get_user_path()
. $version_path . $file_name;
}
protected function get_query_separator($url)
{
return strpos($url, '?') === false ? '?' : '&';
}
protected function get_download_url($file_name, $version = null, $direct = false)
{
if (!$direct && $this->options['download_via_php']) {
$url = $this->options['script_url']
. $this->get_query_separator($this->options['script_url'])
. $this->get_singular_param_name()
. '=' . rawurlencode($file_name);
if ($version) {
$url .= '&version=' . rawurlencode($version);
}
return $url . '&download=1';
}
if (empty($version)) {
$version_path = '';
} else {
$version_url = @$this->options['image_versions'][$version]['upload_url'];
if ($version_url) {
return $version_url . $this->get_user_path() . rawurlencode($file_name);
}
$version_path = rawurlencode($version) . '/';
}
return $this->options['upload_url'] . $this->get_user_path()
. $version_path . rawurlencode($file_name);
}
protected function set_additional_file_properties($file)
{
$file->deleteUrl = $this->options['script_url']
. $this->get_query_separator($this->options['script_url'])
. $this->get_singular_param_name()
. '=' . rawurlencode($file->name);
$file->deleteType = $this->options['delete_type'];
if ($file->deleteType !== 'DELETE') {
$file->deleteUrl .= '&_method=DELETE';
}
if ($this->options['access_control_allow_credentials']) {
$file->deleteWithCredentials = true;
}
}
// Fix for overflowing signed 32 bit integers,
// works for sizes up to 2^32-1 bytes (4 GiB - 1):
protected function fix_integer_overflow($size)
{
if ($size < 0) {
$size += 2.0 * (PHP_INT_MAX + 1);
}
return $size;
}
protected function get_file_size($file_path, $clear_stat_cache = false)
{
if ($clear_stat_cache) {
if (version_compare(PHP_VERSION, '5.3.0') >= 0) {
clearstatcache(true, $file_path);
} else {
clearstatcache();
}
}
return $this->fix_integer_overflow(filesize($file_path));
}
protected function is_valid_file_object($file_name)
{
$file_path = $this->get_upload_path($file_name);
if (strlen($file_name) > 0 && $file_name[0] !== '.' && is_file($file_path)) {
return true;
}
return false;
}
protected function get_file_object($file_name)
{
if ($this->is_valid_file_object($file_name)) {
$file = new \stdClass();
$file->name = $file_name;
$file->size = $this->get_file_size(
$this->get_upload_path($file_name)
);
$file->url = $this->get_download_url($file->name);
foreach ($this->options['image_versions'] as $version => $options) {
if (!empty($version)) {
if (is_file($this->get_upload_path($file_name, $version))) {
$file->{$version . 'Url'} = $this->get_download_url(
$file->name,
$version
);
}
}
}
$this->set_additional_file_properties($file);
return $file;
}
return null;
}
protected function get_file_objects($iteration_method = 'get_file_object')
{
$upload_dir = $this->get_upload_path();
if (!is_dir($upload_dir)) {
return array();
}
return array_values(array_filter(array_map(
array($this, $iteration_method),
scandir($upload_dir)
)));
}
protected function count_file_objects()
{
return count($this->get_file_objects('is_valid_file_object'));
}
protected function get_error_message($error)
{
switch ($error) {
case UPLOAD_ERR_INI_SIZE:
return __('The uploaded file exceeds the upload_max_filesize directive in php.ini');
break;
case UPLOAD_ERR_FORM_SIZE:
return __('The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form');
break;
case UPLOAD_ERR_PARTIAL:
return __('The uploaded file was only partially uploaded');
break;
case UPLOAD_ERR_NO_FILE:
return __('No file was uploaded');
break;
case UPLOAD_ERR_NO_TMP_DIR:
return __('Missing a temporary folder');
break;
case UPLOAD_ERR_CANT_WRITE:
return __('Failed to write file to disk');
break;
case UPLOAD_ERR_EXTENSION:
return __('A PHP extension stopped the file upload');
break;
case 'post_max_size':
return __('The uploaded file exceeds the post_max_size directive in php.ini');
break;
case 'max_file_size':
return __('File is too big');
break;
case 'min_file_size':
return __('File is too small');
break;
case 'max_number_of_files':
return __('Maximum number of files exceeded');
break;
case 'max_width':
return __('Image exceeds maximum width');
break;
case 'min_width':
return __('Image requires a minimum width');
break;
case 'max_height':
return __('Image exceeds maximum height');
break;
case 'min_height':
return __('Image requires a minimum height');
break;
case 'accept_file_types':
return __('Filetype not allowed');
break;
case 'abort':
return __('File upload aborted');
break;
case 'image_resize':
return __('Failed to resize image');
break;
}
return false;
}
public function get_config_bytes($val)
{
$val = trim($val);
$last = strtolower($val[strlen($val) - 1]);
if (is_numeric($val)) {
$val = (int)$val;
} else {
$val = (int)substr($val, 0, -1);
}
switch ($last) {
case 'g':
$val *= 1024;
// no-break: apply following multipliers
case 'm':
$val *= 1024;
// no-break: apply following multipliers
case 'k':
$val *= 1024;
// no-break: apply following multipliers
}
return $this->fix_integer_overflow($val);
}
protected function validate_image_file($uploaded_file, $file, $error, $index)
{
if ($this->imagetype($uploaded_file) !== $this->get_file_type($file->name)) {
$file->error = $this->get_error_message('invalid_file_type');
return false;
}
$max_width = @$this->options['max_width'];
$max_height = @$this->options['max_height'];
$min_width = @$this->options['min_width'];
$min_height = @$this->options['min_height'];
if ($max_width || $max_height || $min_width || $min_height) {
list($img_width, $img_height) = $this->get_image_size($uploaded_file);
if (!empty($img_width) && !empty($img_height)) {
if ($max_width && $img_width > $max_width) {
$file->error = $this->get_error_message('max_width');
return false;
}
if ($max_height && $img_height > $max_height) {
$file->error = $this->get_error_message('max_height');
return false;
}
if ($min_width && $img_width < $min_width) {
$file->error = $this->get_error_message('min_width');
return false;
}
if ($min_height && $img_height < $min_height) {
$file->error = $this->get_error_message('min_height');
return false;
}
}
}
return true;
}
protected function validate($uploaded_file, $file, $error, $index, $content_range)
{
if ($error) {
$file->error = $this->get_error_message($error);
return false;
}
$content_length = $this->fix_integer_overflow(
(int)$this->get_server_var('CONTENT_LENGTH')
);
$post_max_size = $this->get_config_bytes(ini_get('post_max_size'));
if ($post_max_size && ($content_length > $post_max_size)) {
$file->error = $this->get_error_message('post_max_size');
return false;
}
if (!preg_match($this->options['accept_file_types'], $file->name)) {
$file->error = $this->get_error_message('accept_file_types');
return false;
}
if ($uploaded_file && is_uploaded_file($uploaded_file)) {
$file_size = $this->get_file_size($uploaded_file);
} else {
$file_size = $content_length;
}
if (
$this->options['max_file_size'] && (
$file_size > $this->options['max_file_size'] ||
$file->size > $this->options['max_file_size'])
) {
$file->error = $this->get_error_message('max_file_size');
return false;
}
if (
$this->options['min_file_size'] &&
$file_size < $this->options['min_file_size']
) {
$file->error = $this->get_error_message('min_file_size');
return false;
}
if (
is_int($this->options['max_number_of_files']) &&
($this->count_file_objects() >= $this->options['max_number_of_files']) &&
// Ignore additional chunks of existing files:
!is_file($this->get_upload_path($file->name))
) {
$file->error = $this->get_error_message('max_number_of_files');
return false;
}
if (!$content_range && $this->has_image_file_extension($file->name)) {
return $this->validate_image_file($uploaded_file, $file, $error, $index);
}
return true;
}
protected function upcount_name_callback($matches)
{
$index = isset($matches[1]) ? ((int)$matches[1]) + 1 : 1;
$ext = isset($matches[2]) ? $matches[2] : '';
return ' (' . $index . ')' . $ext;
}
protected function upcount_name($name)
{
return preg_replace_callback(
'/(?:(?: \(([\d]+)\))?(\.[^.]+))?$/',
array($this, 'upcount_name_callback'),
$name,
1
);
}
protected function get_unique_filename(
$file_path,
$name,
$size,
$type,
$error,
$index,
$content_range
) {
while (is_dir($this->get_upload_path($name))) {
$name = $this->upcount_name($name);
}
// Keep an existing filename if this is part of a chunked upload:
$uploaded_bytes = $this->fix_integer_overflow((int)@$content_range[1]);
while (is_file($this->get_upload_path($name))) {
if (
$uploaded_bytes === $this->get_file_size(
$this->get_upload_path($name)
)
) {
break;
}
$name = $this->upcount_name($name);
}
return $name;
}
protected function get_valid_image_extensions($file_path)
{
switch ($this->imagetype($file_path)) {
case self::IMAGETYPE_JPEG:
return array('jpg', 'jpeg');
case self::IMAGETYPE_PNG:
return array('png');
case self::IMAGETYPE_GIF:
return array('gif');
}
}
protected function fix_file_extension(
$file_path,
$name,
$size,
$type,
$error,
$index,
$content_range
) {
// Add missing file extension for known image types:
if (
strpos($name, '.') === false &&
preg_match('/^image\/(gif|jpe?g|png)/', $type, $matches)
) {
$name .= '.' . $matches[1];
}
if ($this->options['correct_image_extensions']) {
$extensions = $this->get_valid_image_extensions($file_path);
// Adjust incorrect image file extensions:
if (!empty($extensions)) {
$parts = explode('.', $name);
$extIndex = count($parts) - 1;
$ext = strtolower(@$parts[$extIndex]);
if (!in_array($ext, $extensions)) {
$parts[$extIndex] = $extensions[0];
$name = implode('.', $parts);
}
}
}
return $name;
}
protected function trim_file_name(
$file_path,
$name,
$size,
$type,
$error,
$index,
$content_range
) {
// Remove path information and dots around the filename, to prevent uploading
// into different directories or replacing hidden system files.
// Also remove control characters and spaces (\x00..\x20) around the filename:
$name = trim($this->basename(stripslashes($name)), ".\x00..\x20");
// Replace dots in filenames to avoid security issues with servers
// that interpret multiple file extensions, e.g. "example.php.png":
$replacement = $this->options['replace_dots_in_filenames'];
if (!empty($replacement)) {
$parts = explode('.', $name);
if (count($parts) > 2) {
$ext = array_pop($parts);
$name = implode($replacement, $parts) . '.' . $ext;
}
}
// Use a timestamp for empty filenames:
if (!$name) {
$name = str_replace('.', '-', microtime(true));
}
return $name;
}
protected function get_file_name(
$file_path,
$name,
$size,
$type,
$error,
$index,
$content_range
) {
$name = $this->trim_file_name(
$file_path,
$name,
$size,
$type,
$error,
$index,
$content_range
);
return $this->get_unique_filename(
$file_path,
$this->fix_file_extension(
$file_path,
$name,
$size,
$type,
$error,
$index,
$content_range
),
$size,
$type,
$error,
$index,
$content_range
);
}
protected function get_scaled_image_file_paths($file_name, $version)
{
$file_path = $this->get_upload_path($file_name);
if (!empty($version)) {
$version_dir = $this->get_upload_path(null, $version);
if (!is_dir($version_dir)) {
mkdir($version_dir, $this->options['mkdir_mode'], true);
}
$new_file_path = $version_dir . '/' . $file_name;
} else {
$new_file_path = $file_path;
}
return array($file_path, $new_file_path);
}
protected function gd_get_image_object($file_path, $func, $no_cache = false)
{
if (empty($this->image_objects[$file_path]) || $no_cache) {
$this->gd_destroy_image_object($file_path);
$this->image_objects[$file_path] = $func($file_path);
}
return $this->image_objects[$file_path];
}
protected function gd_set_image_object($file_path, $image)
{
$this->gd_destroy_image_object($file_path);
$this->image_objects[$file_path] = $image;
}
protected function gd_destroy_image_object($file_path)
{
$image = (isset($this->image_objects[$file_path])) ? $this->image_objects[$file_path] : null ;
return $image && imagedestroy($image);
}
protected function gd_imageflip($image, $mode)
{
if (function_exists('imageflip')) {
return imageflip($image, $mode);
}
$new_width = $src_width = imagesx($image);
$new_height = $src_height = imagesy($image);
$new_img = imagecreatetruecolor($new_width, $new_height);
$src_x = 0;
$src_y = 0;
switch ($mode) {
case '1': // flip on the horizontal axis
$src_y = $new_height - 1;
$src_height = -$new_height;
break;
case '2': // flip on the vertical axis
$src_x = $new_width - 1;
$src_width = -$new_width;
break;
case '3': // flip on both axes
$src_y = $new_height - 1;
$src_height = -$new_height;
$src_x = $new_width - 1;
$src_width = -$new_width;
break;
default:
return $image;
}
imagecopyresampled(
$new_img,
$image,
0,
0,
$src_x,
$src_y,
$new_width,
$new_height,
$src_width,
$src_height
);
return $new_img;
}
protected function gd_orient_image($file_path, $src_img)
{
if (!function_exists('exif_read_data')) {
return false;
}
$exif = @exif_read_data($file_path);
if ($exif === false) {
return false;
}
$orientation = (int)@$exif['Orientation'];
if ($orientation < 2 || $orientation > 8) {
return false;
}
switch ($orientation) {
case 2:
$new_img = $this->gd_imageflip(
$src_img,
defined('IMG_FLIP_VERTICAL') ? IMG_FLIP_VERTICAL : 2
);
break;
case 3:
$new_img = imagerotate($src_img, 180, 0);
break;
case 4:
$new_img = $this->gd_imageflip(
$src_img,
defined('IMG_FLIP_HORIZONTAL') ? IMG_FLIP_HORIZONTAL : 1
);
break;
case 5:
$tmp_img = $this->gd_imageflip(
$src_img,
defined('IMG_FLIP_HORIZONTAL') ? IMG_FLIP_HORIZONTAL : 1
);
$new_img = imagerotate($tmp_img, 270, 0);
imagedestroy($tmp_img);
break;
case 6:
$new_img = imagerotate($src_img, 270, 0);
break;
case 7:
$tmp_img = $this->gd_imageflip(
$src_img,
defined('IMG_FLIP_VERTICAL') ? IMG_FLIP_VERTICAL : 2
);
$new_img = imagerotate($tmp_img, 270, 0);
imagedestroy($tmp_img);
break;
case 8:
$new_img = imagerotate($src_img, 90, 0);
break;
default:
return false;
}
$this->gd_set_image_object($file_path, $new_img);
return true;
}
protected function gd_create_scaled_image($file_name, $version, $options)
{
if (!function_exists('imagecreatetruecolor')) {
error_log('Function not found: imagecreatetruecolor');
return false;
}
list($file_path, $new_file_path) =
$this->get_scaled_image_file_paths($file_name, $version);
$type = strtolower(substr(strrchr($file_name, '.'), 1));
switch ($type) {
case 'jpg':
case 'jpeg':
$src_func = 'imagecreatefromjpeg';
$write_func = 'imagejpeg';
$image_quality = isset($options['jpeg_quality']) ?
$options['jpeg_quality'] : 75;
break;
case 'gif':
$src_func = 'imagecreatefromgif';
$write_func = 'imagegif';
$image_quality = null;
break;
case 'png':
$src_func = 'imagecreatefrompng';
$write_func = 'imagepng';
$image_quality = isset($options['png_quality']) ?
$options['png_quality'] : 9;
break;
default:
return false;
}
$src_img = $this->gd_get_image_object(
$file_path,
$src_func,
!empty($options['no_cache'])
);
$image_oriented = false;
if (
!empty($options['auto_orient']) && $this->gd_orient_image(
$file_path,
$src_img
)
) {
$image_oriented = true;
$src_img = $this->gd_get_image_object(
$file_path,
$src_func
);
}
$max_width = $img_width = imagesx($src_img);
$max_height = $img_height = imagesy($src_img);
if (!empty($options['max_width'])) {
$max_width = $options['max_width'];
}
if (!empty($options['max_height'])) {
$max_height = $options['max_height'];
}
$scale = min(
$max_width / $img_width,
$max_height / $img_height
);
if ($scale >= 1) {
if ($image_oriented) {
return $write_func($src_img, $new_file_path, $image_quality);
}
if ($file_path !== $new_file_path) {
return copy($file_path, $new_file_path);
}
return true;
}
if (empty($options['crop'])) {
$new_width = $img_width * $scale;
$new_height = $img_height * $scale;
$dst_x = 0;
$dst_y = 0;
$new_img = imagecreatetruecolor($new_width, $new_height);
} else {
if (($img_width / $img_height) >= ($max_width / $max_height)) {
$new_width = $img_width / ($img_height / $max_height);
$new_height = $max_height;
} else {
$new_width = $max_width;
$new_height = $img_height / ($img_width / $max_width);
}
$dst_x = 0 - ($new_width - $max_width) / 2;
$dst_y = 0 - ($new_height - $max_height) / 2;
$new_img = imagecreatetruecolor($max_width, $max_height);
}
// Handle transparency in GIF and PNG images:
switch ($type) {
case 'gif':
imagecolortransparent($new_img, imagecolorallocate($new_img, 0, 0, 0));
break;
case 'png':
imagecolortransparent($new_img, imagecolorallocate($new_img, 0, 0, 0));
imagealphablending($new_img, false);
imagesavealpha($new_img, true);
break;
}
$success = imagecopyresampled(
$new_img,
$src_img,
$dst_x,
$dst_y,
0,
0,
$new_width,
$new_height,
$img_width,
$img_height
) && $write_func($new_img, $new_file_path, $image_quality);
$this->gd_set_image_object($file_path, $new_img);
return $success;
}
protected function get_image_size($file_path)
{
if (!function_exists('getimagesize')) {
error_log('Function not found: getimagesize');
return false;
}
return @getimagesize($file_path);
}
protected function create_scaled_image($file_name, $version, $options)
{
try {
return $this->gd_create_scaled_image($file_name, $version, $options);
} catch (\Exception $e) {
error_log($e->getMessage());
return false;
}
}
protected function destroy_image_object($file_path)
{
// nothing to do
}
protected function imagetype($file_path)
{
$fp = fopen($file_path, 'r');
$data = fread($fp, 4);
fclose($fp);
// GIF: 47 49 46 38
if ($data === 'GIF8') {
return self::IMAGETYPE_GIF;
}
// JPG: FF D8 FF
if (bin2hex(substr($data, 0, 3)) === 'ffd8ff') {
return self::IMAGETYPE_JPEG;
}
// PNG: 89 50 4E 47
if (bin2hex(@$data[0]) . substr($data, 1, 4) === '89PNG') {
return self::IMAGETYPE_PNG;
}
return false;
}
protected function is_valid_image_file($file_path)
{
return !!$this->imagetype($file_path);
}
protected function has_image_file_extension($file_path)
{
return !!preg_match('/\.(gif|jpe?g|png)$/i', $file_path);
}
protected function handle_image_file($file_path, $file)
{
$failed_versions = array();
foreach ($this->options['image_versions'] as $version => $options) {
if ($this->create_scaled_image($file->name, $version, $options)) {
if (!empty($version)) {
$file->{$version . 'Url'} = $this->get_download_url(
$file->name,
$version
);
} else {
$file->size = $this->get_file_size($file_path, true);
}
} else {
$failed_versions[] = $version ? $version : 'original';
}
}
if (count($failed_versions)) {
$file->error = $this->get_error_message('image_resize')
. ' (' . implode(', ', $failed_versions) . ')';
}
// Free memory:
$this->destroy_image_object($file_path);
}
protected function handle_file_upload(
$uploaded_file,
$name,
$size,
$type,
$error,
$index = null,
$content_range = null
) {
$file = new \stdClass();
$file->name = $this->get_file_name(
$uploaded_file,
$name,
$size,
$type,
$error,
$index,
$content_range
);
$file->size = $this->fix_integer_overflow((int)$size);
$file->type = $type;
if ($this->validate($uploaded_file, $file, $error, $index, $content_range)) {
$this->handle_form_data($file, $index);
$upload_dir = $this->get_upload_path();
if (!is_dir($upload_dir)) {
mkdir($upload_dir, $this->options['mkdir_mode'], true);
}
$file_path = $this->get_upload_path($file->name);
$append_file = $content_range && is_file($file_path) &&
$file->size > $this->get_file_size($file_path);
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(
$file_path,
fopen($this->options['input_stream'], 'r'),
$append_file ? FILE_APPEND : 0
);
}
$file_size = $this->get_file_size($file_path, $append_file);
if ($file_size === $file->size) {
$file->url = $this->get_download_url($file->name);
if ($this->has_image_file_extension($file->name)) {
if ($content_range && !$this->validate_image_file($file_path, $file, $error, $index)) {
unlink($file_path);
} else {
$this->handle_image_file($file_path, $file);
}
}
} else {
$file->size = $file_size;
if (!$content_range && $this->options['discard_aborted_uploads']) {
unlink($file_path);
$file->error = $this->get_error_message('abort');
}
}
$this->set_additional_file_properties($file);
}
return $file;
}
protected function readfile($file_path)
{
$file_size = $this->get_file_size($file_path);
$chunk_size = $this->options['readfile_chunk_size'];
if ($chunk_size && $file_size > $chunk_size) {
$handle = fopen($file_path, 'rb');
while (!feof($handle)) {
echo fread($handle, $chunk_size);
@ob_flush();
@flush();
}
fclose($handle);
return $file_size;
}
return readfile($file_path);
}
protected function body($str)
{
echo $str;
}
protected function header($str)
{
header($str);
}
protected function get_upload_data($id)
{
return array_key_exists($id, $_FILES) ? $_FILES[$id] : '';
}
protected function get_post_param($id)
{
return array_key_exists($id, $_POST) ? $_POST[$id] : '';
}
protected function get_query_param($id)
{
return array_key_exists($id, $_GET) ? $_GET[$id] : '';
}
protected function get_server_var($id)
{
return array_key_exists($id, $_SERVER) ? $_SERVER[$id] : '';
}
protected function handle_form_data($file, $index)
{
// Handle form data, e.g. $_POST['description'][$index]
}
protected function get_version_param()
{
return $this->basename(stripslashes($this->get_query_param('version')));
}
protected function get_singular_param_name()
{
return substr($this->options['param_name'], 0, -1);
}
protected function get_file_name_param()
{
$name = $this->get_singular_param_name();
return $this->basename(stripslashes($this->get_query_param($name)));
}
protected function get_file_names_params()
{
$params = $this->get_query_param($this->options['param_name']);
if (!$params) {
return null;
}
foreach ($params as $key => $value) {
$params[$key] = $this->basename(stripslashes($value));
}
return $params;
}
protected function get_file_type($file_path)
{
switch (strtolower(pathinfo($file_path, PATHINFO_EXTENSION))) {
case 'jpeg':
case 'jpg':
return self::IMAGETYPE_JPEG;
case 'png':
return self::IMAGETYPE_PNG;
case 'gif':
return self::IMAGETYPE_GIF;
default:
return '';
}
}
protected function download()
{
switch ($this->options['download_via_php']) {
case 1:
$redirect_header = null;
break;
case 2:
$redirect_header = 'X-Sendfile';
break;
case 3:
$redirect_header = 'X-Accel-Redirect';
break;
default:
return $this->header('HTTP/1.1 403 Forbidden');
}
$file_name = $this->get_file_name_param();
if (!$this->is_valid_file_object($file_name)) {
return $this->header('HTTP/1.1 404 Not Found');
}
if ($redirect_header) {
return $this->header(
$redirect_header . ': ' . $this->get_download_url(
$file_name,
$this->get_version_param(),
true
)
);
}
$file_path = $this->get_upload_path($file_name, $this->get_version_param());
// Prevent browsers from MIME-sniffing the content-type:
$this->header('X-Content-Type-Options: nosniff');
if (!preg_match($this->options['inline_file_types'], $file_name)) {
$this->header('Content-Type: application/octet-stream');
$this->header('Content-Disposition: attachment; filename="' . $file_name . '"');
} else {
$this->header('Content-Type: ' . $this->get_file_type($file_path));
$this->header('Content-Disposition: inline; filename="' . $file_name . '"');
}
$this->header('Content-Length: ' . $this->get_file_size($file_path));
$this->header('Last-Modified: ' . gmdate('D, d M Y H:i:s T', filemtime($file_path)));
$this->readfile($file_path);
}
protected function send_content_type_header()
{
$this->header('Vary: Accept');
if (strpos($this->get_server_var('HTTP_ACCEPT'), 'application/json') !== false) {
$this->header('Content-type: application/json');
} else {
$this->header('Content-type: text/plain');
}
}
protected function send_access_control_headers()
{
$this->header('Access-Control-Allow-Origin: ' . $this->options['access_control_allow_origin']);
$this->header('Access-Control-Allow-Credentials: '
. ($this->options['access_control_allow_credentials'] ? 'true' : 'false'));
$this->header('Access-Control-Allow-Methods: '
. implode(', ', $this->options['access_control_allow_methods']));
$this->header('Access-Control-Allow-Headers: '
. implode(', ', $this->options['access_control_allow_headers']));
}
public function generate_response($content, $print_response = true)
{
$this->response = $content;
if ($print_response) {
$json = json_encode($content);
$redirect = stripslashes($this->get_post_param('redirect'));
if ($redirect && preg_match($this->options['redirect_allow_target'], $redirect)) {
return $this->header('Location: ' . sprintf($redirect, rawurlencode($json)));
}
$this->head();
if ($this->get_server_var('HTTP_CONTENT_RANGE')) {
$files = isset($content[$this->options['param_name']]) ?
$content[$this->options['param_name']] : null;
if ($files && is_array($files) && is_object($files[0]) && $files[0]->size) {
$this->header('Range: 0-' . (
$this->fix_integer_overflow((int)$files[0]->size) - 1
));
}
}
$this->body($json);
}
return $content;
}
public function get_response()
{
return $this->response;
}
public function head()
{
$this->header('Pragma: no-cache');
$this->header('Cache-Control: no-store, no-cache, must-revalidate');
$this->header('Content-Disposition: inline; filename="files.json"');
// Prevent Internet Explorer from MIME-sniffing the content-type:
$this->header('X-Content-Type-Options: nosniff');
if ($this->options['access_control_allow_origin']) {
$this->send_access_control_headers();
}
$this->send_content_type_header();
}
public function get($print_response = true)
{
if ($print_response && $this->get_query_param('download')) {
return $this->download();
}
$file_name = $this->get_file_name_param();
if ($file_name) {
$response = array(
$this->get_singular_param_name() => $this->get_file_object($file_name)
);
} else {
$response = array(
$this->options['param_name'] => $this->get_file_objects()
);
}
return $this->generate_response($response, $print_response);
}
public function post($print_response = true)
{
if ($this->get_query_param('_method') === 'DELETE') {
return $this->delete($print_response);
}
$upload = $this->get_upload_data($this->options['param_name']);
// Parse the Content-Disposition header, if available:
$content_disposition_header = $this->get_server_var('HTTP_CONTENT_DISPOSITION');
$file_name = $content_disposition_header ?
rawurldecode(preg_replace(
'/(^[^"]+")|("$)/',
'',
$content_disposition_header
)) : null;
// Parse the Content-Range header, which has the following form:
// Content-Range: bytes 0-524287/2000000
$content_range_header = $this->get_server_var('HTTP_CONTENT_RANGE');
$content_range = $content_range_header ?
preg_split('/[^0-9]+/', $content_range_header) : null;
$size = @$content_range[3];
$files = array();
if ($upload) {
if (is_array($upload['tmp_name'])) {
// param_name is an array identifier like "files[]",
// $upload is a multi-dimensional array:
foreach ($upload['tmp_name'] as $index => $value) {
$files[] = $this->handle_file_upload(
$upload['tmp_name'][$index],
$file_name ? $file_name : $upload['name'][$index],
$size ? $size : $upload['size'][$index],
$upload['type'][$index],
$upload['error'][$index],
$index,
$content_range
);
}
} else {
// param_name is a single object identifier like "file",
// $upload is a one-dimensional array:
$files[] = $this->handle_file_upload(
isset($upload['tmp_name']) ? $upload['tmp_name'] : null,
$file_name ? $file_name : (isset($upload['name']) ?
$upload['name'] : null),
$size ? $size : (isset($upload['size']) ?
$upload['size'] : $this->get_server_var('CONTENT_LENGTH')),
isset($upload['type']) ?
$upload['type'] : $this->get_server_var('CONTENT_TYPE'),
isset($upload['error']) ? $upload['error'] : null,
null,
$content_range
);
}
}
$response = array($this->options['param_name'] => $files);
return $this->generate_response($response, $print_response);
}
public function delete($print_response = true)
{
$file_names = $this->get_file_names_params();
if (empty($file_names)) {
$file_names = array($this->get_file_name_param());
}
$response = array();
foreach ($file_names as $file_name) {
$file_path = $this->get_upload_path($file_name);
$success = strlen($file_name) > 0 && $file_name[0] !== '.' && is_file($file_path) && unlink($file_path);
if ($success) {
foreach ($this->options['image_versions'] as $version => $options) {
if (!empty($version)) {
$file = $this->get_upload_path($file_name, $version);
if (is_file($file)) {
unlink($file);
}
}
}
}
$response[$file_name] = $success;
}
return $this->generate_response($response, $print_response);
}
protected function basename($filepath, $suffix = '')
{
$splited = preg_split('/\//', rtrim($filepath, '/ '));
return substr(basename('X' . $splited[count($splited) - 1], $suffix), 1);
}
}