Verzeichnisstruktur phpBB-3.0.0
- Veröffentlicht
- 12.12.2007
So funktioniert es
|
|
Auf das letzte Element klicken. Dies geht jeweils ein Schritt zurück |
Auf das Icon klicken, dies öffnet das Verzeichnis. Nochmal klicken schließt das Verzeichnis. |
|
|
(Beispiel Datei-Icons)
|
Auf das Icon klicken um den Quellcode anzuzeigen |
file.php
001 <?php
002 /**
003 *
004 * @package phpBB3
005 * @version $Id$
006 * @copyright (c) 2005 phpBB Group
007 * @license http://opensource.org/licenses/gpl-license.php GNU Public License
008 *
009 */
010
011 /**
012 * @ignore
013 */
014 define('IN_PHPBB', true);
015 $phpbb_root_path = (defined('PHPBB_ROOT_PATH')) ? PHPBB_ROOT_PATH : './../';
016 $phpEx = substr(strrchr(__FILE__, '.'), 1);
017
018 if (isset($_GET['avatar']))
019 {
020 require($phpbb_root_path . 'config.' . $phpEx);
021 require($phpbb_root_path . 'includes/acm/acm_' . $acm_type . '.' . $phpEx);
022 require($phpbb_root_path . 'includes/cache.' . $phpEx);
023 require($phpbb_root_path . 'includes/db/' . $dbms . '.' . $phpEx);
024 require($phpbb_root_path . 'includes/constants.' . $phpEx);
025
026 $db = new $sql_db();
027 $cache = new cache();
028
029 // Connect to DB
030 if (!@$db->sql_connect($dbhost, $dbuser, $dbpasswd, $dbname, $dbport, false, false))
031 {
032 exit;
033 }
034 unset($dbpasswd);
035
036 // worst-case default
037 $browser = (!empty($_SERVER['HTTP_USER_AGENT'])) ? htmlspecialchars((string) $_SERVER['HTTP_USER_AGENT']) : 'msie 6.0';
038
039 $config = $cache->obtain_config();
040 $filename = $_GET['avatar'];
041 $avatar_group = false;
042 if ($filename[0] === 'g')
043 {
044 $avatar_group = true;
045 $filename = substr($filename, 1);
046 }
047
048 // '==' is not a bug - . as the first char is as bad as no dot at all
049 if (strpos($filename, '.') == false)
050 {
051 header('HTTP/1.0 403 forbidden');
052 if (!empty($cache))
053 {
054 $cache->unload();
055 }
056 $db->sql_close();
057 exit;
058 }
059
060 $ext = substr(strrchr($filename, '.'), 1);
061 $stamp = (int) substr(stristr($filename, '_'), 1);
062 $filename = (int) $filename;
063
064 // let's see if we have to send the file at all
065 $last_load = isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) ? strtotime(trim($_SERVER['HTTP_IF_MODIFIED_SINCE'])) : false;
066 if (strpos(strtolower($browser), 'msie 6.0') === false)
067 {
068 if ($last_load !== false && $last_load <= $stamp)
069 {
070 header('Not Modified', true, 304);
071 // seems that we need those too ... browsers
072 header('Pragma: public');
073 header('Expires: ' . gmdate('D, d M Y H:i:s \G\M\T', time() + 31536000));
074 exit();
075 }
076 else
077 {
078 header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $stamp) . ' GMT');
079 }
080 }
081
082 if (!in_array($ext, array('png', 'gif', 'jpg', 'jpeg')))
083 {
084 // no way such an avatar could exist. They are not following the rules, stop the show.
085 header("HTTP/1.0 403 forbidden");
086 if (!empty($cache))
087 {
088 $cache->unload();
089 }
090 $db->sql_close();
091 exit;
092 }
093
094 if (!$filename)
095 {
096 // no way such an avatar could exist. They are not following the rules, stop the show.
097 header("HTTP/1.0 403 forbidden");
098 if (!empty($cache))
099 {
100 $cache->unload();
101 }
102 $db->sql_close();
103 exit;
104 }
105
106 send_avatar_to_browser(($avatar_group ? 'g' : '') . $filename . '.' . $ext, $browser);
107
108 if (!empty($cache))
109 {
110 $cache->unload();
111 }
112 $db->sql_close();
113 exit;
114 }
115
116 // implicit else: we are not in avatar mode
117 include($phpbb_root_path . 'common.' . $phpEx);
118
119 $download_id = request_var('id', 0);
120 $mode = request_var('mode', '');
121 $thumbnail = request_var('t', false);
122
123 // Start session management, do not update session page.
124 $user->session_begin(false);
125 $auth->acl($user->data);
126 $user->setup('viewtopic');
127
128 if (!$download_id)
129 {
130 trigger_error('NO_ATTACHMENT_SELECTED');
131 }
132
133 if (!$config['allow_attachments'] && !$config['allow_pm_attach'])
134 {
135 trigger_error('ATTACHMENT_FUNCTIONALITY_DISABLED');
136 }
137
138 $sql = 'SELECT attach_id, in_message, post_msg_id, extension, is_orphan, poster_id
139 FROM ' . ATTACHMENTS_TABLE . "
140 WHERE attach_id = $download_id";
141 $result = $db->sql_query_limit($sql, 1);
142 $attachment = $db->sql_fetchrow($result);
143 $db->sql_freeresult($result);
144
145 if (!$attachment)
146 {
147 trigger_error('ERROR_NO_ATTACHMENT');
148 }
149
150 if ((!$attachment['in_message'] && !$config['allow_attachments']) || ($attachment['in_message'] && !$config['allow_pm_attach']))
151 {
152 trigger_error('ATTACHMENT_FUNCTIONALITY_DISABLED');
153 }
154
155 $row = array();
156
157 if ($attachment['is_orphan'])
158 {
159 // We allow admins having attachment permissions to see orphan attachments...
160 $own_attachment = ($auth->acl_get('a_attach') || $attachment['poster_id'] == $user->data['user_id']) ? true : false;
161
162 if (!$own_attachment || ($attachment['in_message'] && !$auth->acl_get('u_pm_download')) || (!$attachment['in_message'] && !$auth->acl_get('u_download')))
163 {
164 trigger_error('ERROR_NO_ATTACHMENT');
165 }
166
167 // Obtain all extensions...
168 $extensions = $cache->obtain_attach_extensions(true);
169 }
170 else
171 {
172 if (!$attachment['in_message'])
173 {
174 //
175 $sql = 'SELECT p.forum_id, f.forum_password, f.parent_id
176 FROM ' . POSTS_TABLE . ' p, ' . FORUMS_TABLE . ' f
177 WHERE p.post_id = ' . $attachment['post_msg_id'] . '
178 AND p.forum_id = f.forum_id';
179 $result = $db->sql_query_limit($sql, 1);
180 $row = $db->sql_fetchrow($result);
181 $db->sql_freeresult($result);
182
183 // Global announcement?
184 $f_download = (!$row) ? $auth->acl_getf_global('f_download') : $auth->acl_get('f_download', $row['forum_id']);
185
186 if ($auth->acl_get('u_download') && $f_download)
187 {
188 if ($row && $row['forum_password'])
189 {
190 // Do something else ... ?
191 login_forum_box($row);
192 }
193 }
194 else
195 {
196 trigger_error('SORRY_AUTH_VIEW_ATTACH');
197 }
198 }
199 else
200 {
201 $row['forum_id'] = false;
202 if (!$auth->acl_get('u_pm_download'))
203 {
204 trigger_error('SORRY_AUTH_VIEW_ATTACH');
205 }
206 }
207
208 // disallowed?
209 $extensions = array();
210 if (!extension_allowed($row['forum_id'], $attachment['extension'], $extensions))
211 {
212 trigger_error(sprintf($user->lang['EXTENSION_DISABLED_AFTER_POSTING'], $attachment['extension']));
213 }
214 }
215
216 if (!download_allowed())
217 {
218 trigger_error($user->lang['LINKAGE_FORBIDDEN']);
219 }
220
221 $download_mode = (int) $extensions[$attachment['extension']]['download_mode'];
222
223 // Fetching filename here to prevent sniffing of filename
224 $sql = 'SELECT attach_id, is_orphan, in_message, post_msg_id, extension, physical_filename, real_filename, mimetype
225 FROM ' . ATTACHMENTS_TABLE . "
226 WHERE attach_id = $download_id";
227 $result = $db->sql_query_limit($sql, 1);
228 $attachment = $db->sql_fetchrow($result);
229 $db->sql_freeresult($result);
230
231 if (!$attachment)
232 {
233 trigger_error('ERROR_NO_ATTACHMENT');
234 }
235
236 $attachment['physical_filename'] = basename($attachment['physical_filename']);
237 $display_cat = $extensions[$attachment['extension']]['display_cat'];
238
239 if (($display_cat == ATTACHMENT_CATEGORY_IMAGE || $display_cat == ATTACHMENT_CATEGORY_THUMB) && !$user->optionget('viewimg'))
240 {
241 $display_cat = ATTACHMENT_CATEGORY_NONE;
242 }
243
244 if ($display_cat == ATTACHMENT_CATEGORY_FLASH && !$user->optionget('viewflash'))
245 {
246 $display_cat = ATTACHMENT_CATEGORY_NONE;
247 }
248
249 if ($thumbnail)
250 {
251 $attachment['physical_filename'] = 'thumb_' . $attachment['physical_filename'];
252 }
253 else if (($display_cat == ATTACHMENT_CATEGORY_NONE || $display_cat == ATTACHMENT_CATEGORY_IMAGE) && !$attachment['is_orphan'])
254 {
255 // Update download count
256 $sql = 'UPDATE ' . ATTACHMENTS_TABLE . '
257 SET download_count = download_count + 1
258 WHERE attach_id = ' . $attachment['attach_id'];
259 $db->sql_query($sql);
260 }
261
262 if ($display_cat == ATTACHMENT_CATEGORY_IMAGE && $mode === 'view' && (strpos($attachment['mimetype'], 'image') === 0) && strpos(strtolower($user->browser), 'msie') !== false)
263 {
264 wrap_img_in_html(append_sid($phpbb_root_path . 'download/file.' . $phpEx, 'id=' . $attachment['attach_id']), $attachment['real_filename']);
265 }
266 else
267 {
268 // Determine the 'presenting'-method
269 if ($download_mode == PHYSICAL_LINK)
270 {
271 // This presenting method should no longer be used
272 if (!@is_dir($phpbb_root_path . $config['upload_path']))
273 {
274 trigger_error($user->lang['PHYSICAL_DOWNLOAD_NOT_POSSIBLE']);
275 }
276
277 redirect($phpbb_root_path . $config['upload_path'] . '/' . $attachment['physical_filename']);
278 exit;
279 }
280 else
281 {
282 send_file_to_browser($attachment, $config['upload_path'], $display_cat);
283 exit;
284 }
285 }
286
287
288 /**
289 * A simplified function to deliver avatars
290 * The argument needs to be checked before calling this function.
291 */
292 function send_avatar_to_browser($file, $browser)
293 {
294 global $config, $phpbb_root_path;
295
296 $prefix = $config['avatar_salt'] . '_';
297 $image_dir = $config['avatar_path'];
298
299 // Adjust image_dir path (no trailing slash)
300 if (substr($image_dir, -1, 1) == '/' || substr($image_dir, -1, 1) == '\\')
301 {
302 $image_dir = substr($image_dir, 0, -1) . '/';
303 }
304 $image_dir = str_replace(array('../', '..\\', './', '.\\'), '', $image_dir);
305
306 if ($image_dir && ($image_dir[0] == '/' || $image_dir[0] == '\\'))
307 {
308 $image_dir = '';
309 }
310 $file_path = $phpbb_root_path . $image_dir . '/' . $prefix . $file;
311
312 if ((@file_exists($file_path) && @is_readable($file_path)) && !headers_sent())
313 {
314 header('Pragma: public');
315
316 $image_data = @getimagesize($file_path);
317 header('Content-Type: ' . image_type_to_mime_type($image_data[2]));
318
319 if (strpos(strtolower($browser), 'msie') !== false)
320 {
321 header('Content-Disposition: attachment; ' . header_filename($file));
322
323 if (strpos(strtolower($browser), 'msie 6.0') !== false)
324 {
325 header('Expires: -1');
326 }
327 else
328 {
329 header('Expires: ' . gmdate('D, d M Y H:i:s \G\M\T', time() + 31536000));
330 }
331 }
332 else
333 {
334 header('Content-Disposition: inline; ' . header_filename($file));
335 header('Expires: ' . gmdate('D, d M Y H:i:s \G\M\T', time() + 31536000));
336 }
337
338 $size = @filesize($file_path);
339 if ($size)
340 {
341 header("Content-Length: $size");
342 }
343
344 if (@readfile($file_path) === false)
345 {
346 $fp = @fopen($file_path, 'rb');
347
348 if ($fp !== false)
349 {
350 while (!feof($fp))
351 {
352 echo fread($fp, 8192);
353 }
354 fclose($fp);
355 }
356 }
357
358 flush();
359 }
360 else
361 {
362 header('HTTP/1.0 404 not found');
363 }
364 }
365
366 /**
367 * Wraps an url into a simple html page. Used to display attachments in IE.
368 * this is a workaround for now; might be moved to template system later
369 * direct any complaints to 1 Microsoft Way, Redmond
370 */
371 function wrap_img_in_html($src, $title)
372 {
373 echo '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-Strict.dtd">';
374 echo '<html>';
375 echo '<head>';
376 echo '<meta http-equiv="content-type" content="text/html; charset=UTF-8" />';
377 echo '<title>' . $title . '</title>';
378 echo '</head>';
379 echo '<body>';
380 echo '<div>';
381 echo '<img src="' . $src . '" alt="' . $title . '" />';
382 echo '</div>';
383 echo '</body>';
384 echo '</html>';
385 }
386
387 /**
388 * Send file to browser
389 */
390 function send_file_to_browser($attachment, $upload_dir, $category)
391 {
392 global $user, $db, $config, $phpbb_root_path;
393
394 $filename = $phpbb_root_path . $upload_dir . '/' . $attachment['physical_filename'];
395
396 if (!@file_exists($filename))
397 {
398 trigger_error($user->lang['ERROR_NO_ATTACHMENT'] . '<br /><br />' . sprintf($user->lang['FILE_NOT_FOUND_404'], $filename));
399 }
400
401 // Correct the mime type - we force application/octetstream for all files, except images
402 // Please do not change this, it is a security precaution
403 if ($category != ATTACHMENT_CATEGORY_IMAGE || strpos($attachment['mimetype'], 'image') !== 0)
404 {
405 $attachment['mimetype'] = (strpos(strtolower($user->browser), 'msie') !== false || strpos(strtolower($user->browser), 'opera') !== false) ? 'application/octetstream' : 'application/octet-stream';
406 }
407
408 if (@ob_get_length())
409 {
410 @ob_end_clean();
411 }
412
413 // Now send the File Contents to the Browser
414 $size = @filesize($filename);
415
416 // To correctly display further errors we need to make sure we are using the correct headers for both (unsetting content-length may not work)
417
418 // Check if headers already sent or not able to get the file contents.
419 if (headers_sent() || !@file_exists($filename) || !@is_readable($filename))
420 {
421 // PHP track_errors setting On?
422 if (!empty($php_errormsg))
423 {
424 trigger_error($user->lang['UNABLE_TO_DELIVER_FILE'] . '<br />' . sprintf($user->lang['TRACKED_PHP_ERROR'], $php_errormsg));
425 }
426
427 trigger_error('UNABLE_TO_DELIVER_FILE');
428 }
429
430 // Now the tricky part... let's dance
431 header('Pragma: public');
432
433 /**
434 * Commented out X-Sendfile support. To not expose the physical filename within the header if xsendfile is absent we need to look into methods of checking it's status.
435 *
436 * Try X-Sendfile since it is much more server friendly - only works if the path is *not* outside of the root path...
437 * lighttpd has core support for it. An apache2 module is available at http://celebnamer.celebworld.ws/stuff/mod_xsendfile/
438 *
439 * Not really ideal, but should work fine...
440 * <code>
441 * if (strpos($upload_dir, '/') !== 0 && strpos($upload_dir, '../') === false)
442 * {
443 * header('X-Sendfile: ' . $filename);
444 * }
445 * </code>
446 */
447
448 // Send out the Headers. Do not set Content-Disposition to inline please, it is a security measure for users using the Internet Explorer.
449 header('Content-Type: ' . $attachment['mimetype']);
450
451 if (empty($user->browser) || (strpos(strtolower($user->browser), 'msie') !== false))
452 {
453 header('Content-Disposition: attachment; ' . header_filename(htmlspecialchars_decode($attachment['real_filename'])));
454 if (empty($user->browser) || (strpos(strtolower($user->browser), 'msie 6.0') !== false))
455 {
456 header('expires: -1');
457 }
458 }
459 else
460 {
461 header('Content-Disposition: ' . ((strpos($attachment['mimetype'], 'image') === 0) ? 'inline' : 'attachment') . '; ' . header_filename(htmlspecialchars_decode($attachment['real_filename'])));
462 }
463
464 if ($size)
465 {
466 header("Content-Length: $size");
467 }
468
469 // Try to deliver in chunks
470 @set_time_limit(0);
471
472 $fp = @fopen($filename, 'rb');
473
474 if ($fp !== false)
475 {
476 while (!feof($fp))
477 {
478 echo fread($fp, 8192);
479 }
480 fclose($fp);
481 }
482 else
483 {
484 @readfile($filename);
485 }
486
487 flush();
488 exit;
489 }
490
491 /**
492 * Get a browser friendly UTF-8 encoded filename
493 */
494 function header_filename($file)
495 {
496 $user_agent = (!empty($_SERVER['HTTP_USER_AGENT'])) ? htmlspecialchars((string) $_SERVER['HTTP_USER_AGENT']) : '';
497
498 // There be dragons here.
499 // Not many follows the RFC...
500 if (strpos($user_agent, 'MSIE') !== false || strpos($user_agent, 'Safari') !== false || strpos($user_agent, 'Konqueror') !== false)
501 {
502 return "filename=" . rawurlencode($file);
503 }
504
505 // follow the RFC for extended filename for the rest
506 return "filename*=UTF-8''" . rawurlencode($file);
507 }
508
509 /**
510 * Check if downloading item is allowed
511 */
512 function download_allowed()
513 {
514 global $config, $user, $db;
515
516 if (!$config['secure_downloads'])
517 {
518 return true;
519 }
520
521 $url = (!empty($_SERVER['HTTP_REFERER'])) ? trim($_SERVER['HTTP_REFERER']) : trim(getenv('HTTP_REFERER'));
522
523 if (!$url)
524 {
525 return ($config['secure_allow_empty_referer']) ? true : false;
526 }
527
528 // Split URL into domain and script part
529 $url = @parse_url($url);
530
531 if ($url === false)
532 {
533 return ($config['secure_allow_empty_referer']) ? true : false;
534 }
535
536 $hostname = $url['host'];
537 unset($url);
538
539 $allowed = ($config['secure_allow_deny']) ? false : true;
540 $iplist = array();
541
542 if (($ip_ary = @gethostbynamel($hostname)) !== false)
543 {
544 foreach ($ip_ary as $ip)
545 {
546 if ($ip)
547 {
548 $iplist[] = $ip;
549 }
550 }
551 }
552
553 // Check for own server...
554 $server_name = (!empty($_SERVER['SERVER_NAME'])) ? $_SERVER['SERVER_NAME'] : getenv('SERVER_NAME');
555
556 // Forcing server vars is the only way to specify/override the protocol
557 if ($config['force_server_vars'] || !$server_name)
558 {
559 $server_name = $config['server_name'];
560 }
561
562 if (preg_match('#^.*?' . preg_quote($server_name, '#') . '.*?$#i', $hostname))
563 {
564 $allowed = true;
565 }
566
567 // Get IP's and Hostnames
568 if (!$allowed)
569 {
570 $sql = 'SELECT site_ip, site_hostname, ip_exclude
571 FROM ' . SITELIST_TABLE;
572 $result = $db->sql_query($sql);
573
574 while ($row = $db->sql_fetchrow($result))
575 {
576 $site_ip = trim($row['site_ip']);
577 $site_hostname = trim($row['site_hostname']);
578
579 if ($site_ip)
580 {
581 foreach ($iplist as $ip)
582 {
583 if (preg_match('#^' . str_replace('\*', '.*?', preg_quote($site_ip, '#')) . '$#i', $ip))
584 {
585 if ($row['ip_exclude'])
586 {
587 $allowed = ($config['secure_allow_deny']) ? false : true;
588 break 2;
589 }
590 else
591 {
592 $allowed = ($config['secure_allow_deny']) ? true : false;
593 }
594 }
595 }
596 }
597
598 if ($site_hostname)
599 {
600 if (preg_match('#^' . str_replace('\*', '.*?', preg_quote($site_hostname, '#')) . '$#i', $hostname))
601 {
602 if ($row['ip_exclude'])
603 {
604 $allowed = ($config['secure_allow_deny']) ? false : true;
605 break;
606 }
607 else
608 {
609 $allowed = ($config['secure_allow_deny']) ? true : false;
610 }
611 }
612 }
613 }
614 $db->sql_freeresult($result);
615 }
616
617 return $allowed;
618 }
619
620 ?>