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| 1 | <?php |
| 2 | /** |
| 3 | * |
| 4 | * This file is part of the phpBB Forum Software package. |
| 5 | * |
| 6 | * @copyright (c) phpBB Limited <https://www.phpbb.com> |
| 7 | * @license GNU General Public License, version 2 (GPL-2.0) |
| 8 | * |
| 9 | * For full copyright and license information, please see |
| 10 | * the docs/CREDITS.txt file. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | namespace phpbb\plupload; |
| 15 | |
| 16 | /** |
| 17 | * This class handles all server-side plupload functions |
| 18 | */ |
| 19 | class plupload |
| 20 | { |
| 21 | /** |
| 22 | * @var string |
| 23 | */ |
| 24 | protected $phpbb_root_path; |
| 25 | |
| 26 | /** |
| 27 | * @var \phpbb\config\config |
| 28 | */ |
| 29 | protected $config; |
| 30 | |
| 31 | /** |
| 32 | * @var \phpbb\request\request |
| 33 | */ |
| 34 | protected $request; |
| 35 | |
| 36 | /** |
| 37 | * @var \phpbb\user |
| 38 | */ |
| 39 | protected $user; |
| 40 | |
| 41 | /** |
| 42 | * @var \bantu\IniGetWrapper\IniGetWrapper |
| 43 | */ |
| 44 | protected $php_ini; |
| 45 | |
| 46 | /** |
| 47 | * @var \phpbb\mimetype\guesser |
| 48 | */ |
| 49 | protected $mimetype_guesser; |
| 50 | |
| 51 | /** |
| 52 | * Final destination for uploaded files, i.e. the "files" directory. |
| 53 | * @var string |
| 54 | */ |
| 55 | protected $upload_directory; |
| 56 | |
| 57 | /** |
| 58 | * Temporary upload directory for plupload uploads. |
| 59 | * @var string |
| 60 | */ |
| 61 | protected $temporary_directory; |
| 62 | |
| 63 | /** |
| 64 | * Constructor. |
| 65 | * |
| 66 | * @param string $phpbb_root_path |
| 67 | * @param \phpbb\config\config $config |
| 68 | * @param \phpbb\request\request $request |
| 69 | * @param \phpbb\user $user |
| 70 | * @param \bantu\IniGetWrapper\IniGetWrapper $php_ini |
| 71 | * @param \phpbb\mimetype\guesser $mimetype_guesser |
| 72 | */ |
| 73 | public function __construct($phpbb_root_path, \phpbb\config\config $config, \phpbb\request\request $request, \phpbb\user $user, \bantu\IniGetWrapper\IniGetWrapper $php_ini, \phpbb\mimetype\guesser $mimetype_guesser) |
| 74 | { |
| 75 | $this->phpbb_root_path = $phpbb_root_path; |
| 76 | $this->config = $config; |
| 77 | $this->request = $request; |
| 78 | $this->user = $user; |
| 79 | $this->php_ini = $php_ini; |
| 80 | $this->mimetype_guesser = $mimetype_guesser; |
| 81 | |
| 82 | $this->set_default_directories(); |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Plupload allows for chunking so we must check for that and assemble |
| 87 | * the whole file first before performing any checks on it. |
| 88 | * |
| 89 | * @param string $form_name The name of the file element in the upload form |
| 90 | * |
| 91 | * @return array|null null if there are no chunks to piece together |
| 92 | * otherwise array containing the path to the |
| 93 | * pieced-together file and its size |
| 94 | */ |
| 95 | public function handle_upload($form_name) |
| 96 | { |
| 97 | $chunks_expected = $this->request->variable('chunks', 0); |
| 98 | |
| 99 | // If chunking is disabled or we are not using plupload, just return |
| 100 | // and handle the file as usual |
| 101 | if ($chunks_expected < 2) |
| 102 | { |
| 103 | return null; |
| 104 | } |
| 105 | |
| 106 | $file_name = $this->request->variable('name', ''); |
| 107 | $chunk = $this->request->variable('chunk', 0); |
| 108 | |
| 109 | $this->user->add_lang('plupload'); |
| 110 | $this->prepare_temporary_directory(); |
| 111 | |
| 112 | $file_path = $this->temporary_filepath($file_name); |
| 113 | $this->integrate_uploaded_file($form_name, $chunk, $file_path); |
| 114 | |
| 115 | // If we are done with all the chunks, strip the .part suffix and then |
| 116 | // handle the resulting file as normal, otherwise die and await the |
| 117 | // next chunk. |
| 118 | if ($chunk == $chunks_expected - 1) |
| 119 | { |
| 120 | rename("{$file_path}.part", $file_path); |
| 121 | |
| 122 | // Reset upload directories to defaults once completed |
| 123 | $this->set_default_directories(); |
| 124 | |
| 125 | // Need to modify some of the $_FILES values to reflect the new file |
| 126 | return array( |
| 127 | 'tmp_name' => $file_path, |
| 128 | 'name' => $this->request->variable('real_filename', '', true), |
| 129 | 'size' => filesize($file_path), |
| 130 | 'type' => $this->mimetype_guesser->guess($file_path, $file_name), |
| 131 | ); |
| 132 | } |
| 133 | else |
| 134 | { |
| 135 | $json_response = new \phpbb\json_response(); |
| 136 | $json_response->send(array( |
| 137 | 'jsonrpc' => '2.0', |
| 138 | 'id' => 'id', |
| 139 | 'result' => null, |
| 140 | )); |
| 141 | return null; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * Fill in the plupload configuration options in the template |
| 147 | * |
| 148 | * @param \phpbb\cache\service $cache |
| 149 | * @param \phpbb\template\template $template |
| 150 | * @param string $s_action The URL to submit the POST data to |
| 151 | * @param int $forum_id The ID of the forum |
| 152 | * @param int $max_files Maximum number of files allowed. 0 for unlimited. |
| 153 | * |
| 154 | * @return void |
| 155 | */ |
| 156 | public function configure(\phpbb\cache\service $cache, \phpbb\template\template $template, $s_action, $forum_id, $max_files) |
| 157 | { |
| 158 | $filters = $this->generate_filter_string($cache, $forum_id); |
| 159 | $chunk_size = $this->get_chunk_size(); |
| 160 | $resize = $this->generate_resize_string(); |
| 161 | |
| 162 | $template->assign_vars(array( |
| 163 | 'S_RESIZE' => $resize, |
| 164 | 'S_PLUPLOAD' => true, |
| 165 | 'FILTERS' => $filters, |
| 166 | 'CHUNK_SIZE' => $chunk_size, |
| 167 | 'S_PLUPLOAD_URL' => html_entity_decode($s_action, ENT_COMPAT), |
| 168 | 'MAX_ATTACHMENTS' => $max_files, |
| 169 | 'ATTACH_ORDER' => ($this->config['display_order']) ? 'asc' : 'desc', |
| 170 | 'L_TOO_MANY_ATTACHMENTS' => $this->user->lang('TOO_MANY_ATTACHMENTS', $max_files), |
| 171 | )); |
| 172 | |
| 173 | $this->user->add_lang('plupload'); |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * Checks whether the page request was sent by plupload or not |
| 178 | * |
| 179 | * @return bool |
| 180 | */ |
| 181 | public function is_active() |
| 182 | { |
| 183 | return $this->request->header('X-PHPBB-USING-PLUPLOAD', false); |
| 184 | } |
| 185 | |
| 186 | /** |
| 187 | * Returns whether the current HTTP request is a multipart request. |
| 188 | * |
| 189 | * @return bool |
| 190 | */ |
| 191 | public function is_multipart() |
| 192 | { |
| 193 | $content_type = $this->request->server('CONTENT_TYPE'); |
| 194 | |
| 195 | return strpos($content_type, 'multipart') === 0; |
| 196 | } |
| 197 | |
| 198 | /** |
| 199 | * Sends an error message back to the client via JSON response |
| 200 | * |
| 201 | * @param int $code The error code |
| 202 | * @param string $msg The translation string of the message to be sent |
| 203 | * |
| 204 | * @return void |
| 205 | */ |
| 206 | public function emit_error($code, $msg) |
| 207 | { |
| 208 | $json_response = new \phpbb\json_response(); |
| 209 | $json_response->send(array( |
| 210 | 'jsonrpc' => '2.0', |
| 211 | 'id' => 'id', |
| 212 | 'error' => array( |
| 213 | 'code' => $code, |
| 214 | 'message' => $this->user->lang($msg), |
| 215 | ), |
| 216 | )); |
| 217 | } |
| 218 | |
| 219 | /** |
| 220 | * Looks at the list of allowed extensions and generates a string |
| 221 | * appropriate for use in configuring plupload with |
| 222 | * |
| 223 | * @param \phpbb\cache\service $cache Cache service object |
| 224 | * @param int $forum_id The forum identifier |
| 225 | * |
| 226 | * @return string |
| 227 | */ |
| 228 | public function generate_filter_string(\phpbb\cache\service $cache, int $forum_id) |
| 229 | { |
| 230 | $groups = []; |
| 231 | $filters = []; |
| 232 | |
| 233 | $attach_extensions = $cache->obtain_attach_extensions($forum_id); |
| 234 | unset($attach_extensions['_allowed_']); |
| 235 | |
| 236 | // Re-arrange the extension array to $groups[$group_name][] |
| 237 | foreach ($attach_extensions as $extension => $extension_info) |
| 238 | { |
| 239 | $groups[$extension_info['group_name']]['extensions'][] = $extension; |
| 240 | $groups[$extension_info['group_name']]['max_file_size'] = (int) $extension_info['max_filesize']; |
| 241 | } |
| 242 | |
| 243 | foreach ($groups as $group => $group_info) |
| 244 | { |
| 245 | $filters[] = sprintf( |
| 246 | "{title: '%s', extensions: '%s', max_file_size: %s}", |
| 247 | addslashes(ucfirst(strtolower($group))), |
| 248 | addslashes(implode(',', $group_info['extensions'])), |
| 249 | $group_info['max_file_size'] |
| 250 | ); |
| 251 | } |
| 252 | |
| 253 | return implode(',', $filters); |
| 254 | } |
| 255 | |
| 256 | /** |
| 257 | * Generates a string that is used to tell plupload to automatically resize |
| 258 | * files before uploading them. |
| 259 | * |
| 260 | * @return string |
| 261 | */ |
| 262 | public function generate_resize_string() |
| 263 | { |
| 264 | $resize = ''; |
| 265 | if ($this->config['img_max_height'] > 0 && $this->config['img_max_width'] > 0) |
| 266 | { |
| 267 | $preserve_headers_value = $this->config['img_strip_metadata'] ? 'false' : 'true'; |
| 268 | $resize = sprintf( |
| 269 | 'resize: {width: %d, height: %d, quality: %d, preserve_headers: %s},', |
| 270 | (int) $this->config['img_max_width'], |
| 271 | (int) $this->config['img_max_height'], |
| 272 | (int) $this->config['img_quality'], |
| 273 | $preserve_headers_value |
| 274 | ); |
| 275 | } |
| 276 | |
| 277 | return $resize; |
| 278 | } |
| 279 | |
| 280 | /** |
| 281 | * Checks various php.ini values to determine the maximum chunk |
| 282 | * size a file should be split into for upload. |
| 283 | * |
| 284 | * The intention is to calculate a value which reflects whatever |
| 285 | * the most restrictive limit is set to. And to then set the chunk |
| 286 | * size to half that value, to ensure any required transfer overhead |
| 287 | * and POST data remains well within the limit. Or, if all of the |
| 288 | * limits are set to unlimited, the chunk size will also be unlimited. |
| 289 | * |
| 290 | * @return int |
| 291 | * |
| 292 | * @access public |
| 293 | */ |
| 294 | public function get_chunk_size() |
| 295 | { |
| 296 | $max = 0; |
| 297 | |
| 298 | $limits = [ |
| 299 | $this->php_ini->getBytes('memory_limit'), |
| 300 | $this->php_ini->getBytes('upload_max_filesize'), |
| 301 | $this->php_ini->getBytes('post_max_size'), |
| 302 | ]; |
| 303 | |
| 304 | foreach ($limits as $limit_type) |
| 305 | { |
| 306 | if ($limit_type > 0) |
| 307 | { |
| 308 | $max = ($max !== 0) ? min($limit_type, $max) : $limit_type; |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | return (int) floor($max / 2); |
| 313 | } |
| 314 | |
| 315 | protected function temporary_filepath($file_name) |
| 316 | { |
| 317 | // Must preserve the extension for plupload to work. |
| 318 | return sprintf( |
| 319 | '%s/%s_%s%s', |
| 320 | $this->temporary_directory, |
| 321 | $this->config['plupload_salt'], |
| 322 | md5($file_name), |
| 323 | \phpbb\files\filespec::get_extension($file_name) |
| 324 | ); |
| 325 | } |
| 326 | |
| 327 | /** |
| 328 | * Checks whether the chunk we are about to deal with was actually uploaded |
| 329 | * by PHP and actually exists, if not, it generates an error |
| 330 | * |
| 331 | * @param string $form_name The name of the file in the form data |
| 332 | * @param int $chunk Chunk number |
| 333 | * @param string $file_path File path |
| 334 | * |
| 335 | * @return void |
| 336 | */ |
| 337 | protected function integrate_uploaded_file($form_name, $chunk, $file_path) |
| 338 | { |
| 339 | $is_multipart = $this->is_multipart(); |
| 340 | $upload = $this->request->file($form_name); |
| 341 | if ($is_multipart && (!isset($upload['tmp_name']) || !is_uploaded_file($upload['tmp_name']))) |
| 342 | { |
| 343 | $this->emit_error(103, 'PLUPLOAD_ERR_MOVE_UPLOADED'); |
| 344 | } |
| 345 | |
| 346 | $tmp_file = $this->temporary_filepath($upload['tmp_name']); |
| 347 | |
| 348 | if (!phpbb_is_writable($this->temporary_directory) || !move_uploaded_file($upload['tmp_name'], $tmp_file)) |
| 349 | { |
| 350 | $this->emit_error(103, 'PLUPLOAD_ERR_MOVE_UPLOADED'); |
| 351 | } |
| 352 | |
| 353 | $out = fopen("{$file_path}.part", $chunk == 0 ? 'wb' : 'ab'); |
| 354 | if (!$out) |
| 355 | { |
| 356 | $this->emit_error(102, 'PLUPLOAD_ERR_OUTPUT'); |
| 357 | } |
| 358 | |
| 359 | $in = fopen(($is_multipart) ? $tmp_file : 'php://input', 'rb'); |
| 360 | if (!$in) |
| 361 | { |
| 362 | $this->emit_error(101, 'PLUPLOAD_ERR_INPUT'); |
| 363 | } |
| 364 | |
| 365 | while ($buf = fread($in, 4096)) |
| 366 | { |
| 367 | fwrite($out, $buf); |
| 368 | } |
| 369 | |
| 370 | fclose($in); |
| 371 | fclose($out); |
| 372 | |
| 373 | if ($is_multipart) |
| 374 | { |
| 375 | unlink($tmp_file); |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | /** |
| 380 | * Creates the temporary directory if it does not already exist. |
| 381 | * |
| 382 | * @return void |
| 383 | */ |
| 384 | protected function prepare_temporary_directory() |
| 385 | { |
| 386 | if (!file_exists($this->temporary_directory)) |
| 387 | { |
| 388 | mkdir($this->temporary_directory); |
| 389 | |
| 390 | copy( |
| 391 | $this->upload_directory . '/index.htm', |
| 392 | $this->temporary_directory . '/index.htm' |
| 393 | ); |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | /** |
| 398 | * Sets the default directories for uploads |
| 399 | * |
| 400 | * @return void |
| 401 | */ |
| 402 | protected function set_default_directories() |
| 403 | { |
| 404 | $this->upload_directory = $this->phpbb_root_path . $this->config['upload_path']; |
| 405 | $this->temporary_directory = $this->upload_directory . '/plupload'; |
| 406 | } |
| 407 | |
| 408 | /** |
| 409 | * Sets the upload directories to the specified paths |
| 410 | * |
| 411 | * @param string $upload_directory Upload directory |
| 412 | * @param string $temporary_directory Temporary directory |
| 413 | * |
| 414 | * @return void |
| 415 | */ |
| 416 | public function set_upload_directories($upload_directory, $temporary_directory) |
| 417 | { |
| 418 | $this->upload_directory = $upload_directory; |
| 419 | $this->temporary_directory = $temporary_directory; |
| 420 | } |
| 421 | } |