-<?php

-/**

-*

-* @package phpBB3

-* @version $Id$

-* @copyright (c) 2005 phpBB Group

-* @license http://opensource.org/licenses/gpl-license.php GNU Public License

-*

-*/

-

-/**

-* @ignore

-*/

-define('IN_PHPBB', true);

-if (!defined('PHPBB_ROOT_PATH')) define('PHPBB_ROOT_PATH', './../');

-if (!defined('PHP_EXT')) define('PHP_EXT', substr(strrchr(__FILE__, '.'), 1));

-include(PHPBB_ROOT_PATH . 'includes/core/bootstrap.' . PHP_EXT);

-

-// Thank you sun.

-if (isset($_SERVER['CONTENT_TYPE']))

-{

- if ($_SERVER['CONTENT_TYPE'] === 'application/x-java-archive')

- {

- exit;

- }

-}

-else if (isset($_SERVER['HTTP_USER_AGENT']) && strpos($_SERVER['HTTP_USER_AGENT'], 'Java') !== false)

-{

- exit;

-}

-

-if (phpbb_request::is_set('avatar', phpbb_request::GET))

-{

- // worst-case default

- $browser = (!empty($_SERVER['HTTP_USER_AGENT'])) ? htmlspecialchars((string) $_SERVER['HTTP_USER_AGENT']) : 'msie 6.0';

-

- phpbb::$config = phpbb_cache::obtain_config();

- $filename = phpbb_request::variable('avatar', '', false, phpbb_request::GET);

- $avatar_group = false;

- $exit = false;

-

- if ($filename[0] === 'g')

- {

- $avatar_group = true;

- $filename = substr($filename, 1);

- }

-

- // '==' is not a bug - . as the first char is as bad as no dot at all

- if (strpos($filename, '.') == false)

- {

- header('HTTP/1.0 403 forbidden');

- $exit = true;

- }

-

- if (!$exit)

- {

- $ext = substr(strrchr($filename, '.'), 1);

- $stamp = (int) substr(stristr($filename, '_'), 1);

- $filename = (int) $filename;

- $exit = set_modified_headers($stamp, $browser);

- }

- if (!$exit && !in_array($ext, array('png', 'gif', 'jpg', 'jpeg')))

- {

- // no way such an avatar could exist. They are not following the rules, stop the show.

- header("HTTP/1.0 403 Forbidden");

- $exit = true;

- }

-

-

- if (!$exit)

- {

- if (!$filename)

- {

- // no way such an avatar could exist. They are not following the rules, stop the show.

- header("HTTP/1.0 403 Forbidden");

- }

- else

- {

- send_avatar_to_browser(($avatar_group ? 'g' : '') . $filename . '.' . $ext, $browser);

- }

- }

- file_gc();

-}

-

-// implicit else: we are not in avatar mode

-$download_id = request_var('id', 0);

-$mode = request_var('mode', '');

-$thumbnail = request_var('t', false);

-

-// Start session management, do not update session page.

-phpbb::$user->session_begin(false);

-phpbb::$acl->init(phpbb::$user->data);

-phpbb::$user->setup('viewtopic');

-

-if (!$download_id)

-{

- trigger_error('NO_ATTACHMENT_SELECTED');

-}

-

-if (!phpbb::$config['allow_attachments'] && !phpbb::$config['allow_pm_attach'])

-{

- trigger_error('ATTACHMENT_FUNCTIONALITY_DISABLED');

-}

-

-$sql = 'SELECT attach_id, in_message, post_msg_id, extension, is_orphan, poster_id, filetime

- FROM ' . ATTACHMENTS_TABLE . "

- WHERE attach_id = $download_id";

-$result = phpbb::$db->sql_query_limit($sql, 1);

-$attachment = phpbb::$db->sql_fetchrow($result);

-phpbb::$db->sql_freeresult($result);

-

-if (!$attachment)

-{

- trigger_error('ERROR_NO_ATTACHMENT');

-}

-

-if ((!$attachment['in_message'] && !phpbb::$config['allow_attachments']) || ($attachment['in_message'] && !phpbb::$config['allow_pm_attach']))

-{

- trigger_error('ATTACHMENT_FUNCTIONALITY_DISABLED');

-}

-

-$row = array();

-

-if ($attachment['is_orphan'])

-{

- // We allow admins having attachment permissions to see orphan attachments...

- $own_attachment = (phpbb::$acl->acl_get('a_attach') || $attachment['poster_id'] == phpbb::$user->data['user_id']) ? true : false;

-

- if (!$own_attachment || ($attachment['in_message'] && !phpbb::$acl->acl_get('u_pm_download')) || (!$attachment['in_message'] && !phpbb::$acl->acl_get('u_download')))

- {

- trigger_error('ERROR_NO_ATTACHMENT');

- }

-

- // Obtain all extensions...

- $extensions = phpbb_cache::obtain_extensions();

-}

-else

-{

- if (!$attachment['in_message'])

- {

- //

- $sql = 'SELECT p.forum_id, f.forum_password, f.parent_id

- FROM ' . POSTS_TABLE . ' p, ' . FORUMS_TABLE . ' f

- WHERE p.post_id = ' . $attachment['post_msg_id'] . '

- AND p.forum_id = f.forum_id';

- $result = phpbb::$db->sql_query_limit($sql, 1);

- $row = phpbb::$db->sql_fetchrow($result);

- phpbb::$db->sql_freeresult($result);

-

- // Global announcement?

- $f_download = (!$row) ? phpbb::$acl->acl_getf_global('f_download') : phpbb::$acl->acl_get('f_download', $row['forum_id']);

-

- if (phpbb::$acl->acl_get('u_download') && $f_download)

- {

- if ($row && $row['forum_password'])

- {

- // Do something else ... ?

- login_forum_box($row);

- }

- }

- else

- {

- trigger_error('SORRY_AUTH_VIEW_ATTACH');

- }

- }

- else

- {

- $row['forum_id'] = false;

- if (!phpbb::$acl->acl_get('u_pm_download'))

- {

- header('HTTP/1.0 403 forbidden');

- trigger_error('SORRY_AUTH_VIEW_ATTACH');

- }

-

- // Check if the attachment is within the users scope...

- $sql = 'SELECT user_id, author_id

- FROM ' . PRIVMSGS_TO_TABLE . '

- WHERE msg_id = ' . $attachment['post_msg_id'];

- $result = phpbb::$db->sql_query($sql);

-

- $allowed = false;

- while ($user_row = phpbb::$db->sql_fetchrow($result))

- {

- if (phpbb::$user->data['user_id'] == $user_row['user_id'] || phpbb::$user->data['user_id'] == $user_row['author_id'])

- {

- $allowed = true;

- break;

- }

- }

- phpbb::$db->sql_freeresult($result);

-

- if (!$allowed)

- {

- header('HTTP/1.0 403 forbidden');

- trigger_error('ERROR_NO_ATTACHMENT');

- }

- }

-

- // disallowed?

- $extensions = array();

- if (!extension_allowed($row['forum_id'], $attachment['extension'], $extensions))

- {

- trigger_error(sprintf(phpbb::$user->lang['EXTENSION_DISABLED_AFTER_POSTING'], $attachment['extension']));

- }

-}

-

-if (!download_allowed())

-{

- header('HTTP/1.0 403 forbidden');

- trigger_error(phpbb::$user->lang['LINKAGE_FORBIDDEN']);

-}

-

-$download_mode = (int) $extensions[$attachment['extension']]['download_mode'];

-

-// Fetching filename here to prevent sniffing of filename

-$sql = 'SELECT attach_id, is_orphan, in_message, post_msg_id, extension, physical_filename, real_filename, mimetype, filetime

- FROM ' . ATTACHMENTS_TABLE . "

- WHERE attach_id = $download_id";

-$result = phpbb::$db->sql_query_limit($sql, 1);

-$attachment = phpbb::$db->sql_fetchrow($result);

-phpbb::$db->sql_freeresult($result);

-

-if (!$attachment)

-{

- trigger_error('ERROR_NO_ATTACHMENT');

-}

-

-$attachment['physical_filename'] = basename($attachment['physical_filename']);

-$display_cat = $extensions[$attachment['extension']]['display_cat'];

-

-if (($display_cat == ATTACHMENT_CATEGORY_IMAGE || $display_cat == ATTACHMENT_CATEGORY_THUMB) && !phpbb::$user->optionget('viewimg'))

-{

- $display_cat = ATTACHMENT_CATEGORY_NONE;

-}

-

-if ($display_cat == ATTACHMENT_CATEGORY_FLASH && !phpbb::$user->optionget('viewflash'))

-{

- $display_cat = ATTACHMENT_CATEGORY_NONE;

-}

-

-if ($thumbnail)

-{

- $attachment['physical_filename'] = 'thumb_' . $attachment['physical_filename'];

-}

-else if (($display_cat == ATTACHMENT_CATEGORY_NONE/* || $display_cat == ATTACHMENT_CATEGORY_IMAGE*/) && !$attachment['is_orphan'])

-{

- // Update download count

- $sql = 'UPDATE ' . ATTACHMENTS_TABLE . '

- SET download_count = download_count + 1

- WHERE attach_id = ' . $attachment['attach_id'];

- phpbb::$db->sql_query($sql);

-}

-

-if ($display_cat == ATTACHMENT_CATEGORY_IMAGE && $mode === 'view' && (strpos($attachment['mimetype'], 'image') === 0) && ((strpos(strtolower(phpbb::$user->system['browser']), 'msie') !== false) && (strpos(strtolower(phpbb::$user->system['browser']), 'msie 8.0') === false)))

-{

- wrap_img_in_html(append_sid('download/file', 'id=' . $attachment['attach_id']), $attachment['real_filename']);

-}

-else

-{

- // Determine the 'presenting'-method

- if ($download_mode == PHYSICAL_LINK)

- {

- // This presenting method should no longer be used

- if (!@is_dir(PHPBB_ROOT_PATH . phpbb::$config['upload_path']))

- {

- trigger_error(phpbb::$user->lang['PHYSICAL_DOWNLOAD_NOT_POSSIBLE']);

- }

-

- redirect(PHPBB_ROOT_PATH . phpbb::$config['upload_path'] . '/' . $attachment['physical_filename']);

- file_gc();

- }

- else

- {

- send_file_to_browser($attachment, phpbb::$config['upload_path'], $display_cat);

- file_gc();

- }

-}

-

-

-/**

-* A simplified function to deliver avatars

-* The argument needs to be checked before calling this function.

-*/

-function send_avatar_to_browser($file, $browser)

-{

- $prefix = phpbb::$config['avatar_salt'] . '_';

- $image_dir = phpbb::$config['avatar_path'];

-

- // Adjust image_dir path (no trailing slash)

- if (substr($image_dir, -1, 1) == '/' || substr($image_dir, -1, 1) == '\\')

- {

- $image_dir = substr($image_dir, 0, -1) . '/';

- }

- $image_dir = str_replace(array('../', '..\\', './', '.\\'), '', $image_dir);

-

- if ($image_dir && ($image_dir[0] == '/' || $image_dir[0] == '\\'))

- {

- $image_dir = '';

- }

- $file_path = PHPBB_ROOT_PATH . $image_dir . '/' . $prefix . $file;

-

- if ((@file_exists($file_path) && @is_readable($file_path)) && !headers_sent())

- {

- header('Pragma: public');

-

- $image_data = @getimagesize($file_path);

- header('Content-Type: ' . image_type_to_mime_type($image_data[2]));

-

- if (strpos(strtolower($browser), 'msie') !== false && strpos(strtolower($browser), 'msie 8.0') === false)

- {

- header('Content-Disposition: attachment; ' . header_filename($file));

-

- if (strpos(strtolower($browser), 'msie 6.0') !== false)

- {

- header('Expires: -1');

- }

- else

- {

- header('Expires: ' . gmdate('D, d M Y H:i:s \G\M\T', time() + 31536000));

- }

- }

- else

- {

- header('Content-Disposition: inline; ' . header_filename($file));

- header('Expires: ' . gmdate('D, d M Y H:i:s \G\M\T', time() + 31536000));

- }

-

- $size = @filesize($file_path);

- if ($size)

- {

- header("Content-Length: $size");

- }

-

- if (@readfile($file_path) == false)

- {

- $fp = @fopen($file_path, 'rb');

-

- if ($fp !== false)

- {

- while (!feof($fp))

- {

- echo fread($fp, 8192);

- }

- fclose($fp);

- }

- }

-

- flush();

- }

- else

- {

- header('HTTP/1.0 404 Not Found');

- }

-}

-

-/**

-* Wraps an url into a simple html page. Used to display attachments in IE.

-* this is a workaround for now; might be moved to template system later

-* direct any complaints to 1 Microsoft Way, Redmond

-*/

-function wrap_img_in_html($src, $title)

-{

- echo '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-Strict.dtd">';

- echo '<html>';

- echo '<head>';

- echo '<meta http-equiv="content-type" content="text/html; charset=UTF-8" />';

- echo '<title>' . $title . '</title>';

- echo '</head>';

- echo '<body>';

- echo '<div>';

- echo '<img src="' . $src . '" alt="' . $title . '" />';

- echo '</div>';

- echo '</body>';

- echo '</html>';

-}

-

-/**

-* Send file to browser

-*/

-function send_file_to_browser($attachment, $upload_dir, $category)

-{

- $filename = PHPBB_ROOT_PATH . $upload_dir . '/' . $attachment['physical_filename'];

-

- if (!@file_exists($filename))

- {

- trigger_error(phpbb::$user->lang['ERROR_NO_ATTACHMENT'] . '<br /><br />' . sprintf(phpbb::$user->lang['FILE_NOT_FOUND_404'], $filename));

- }

-

- // Correct the mime type - we force application/octetstream for all files, except images

- // Please do not change this, it is a security precaution

- if ($category != ATTACHMENT_CATEGORY_IMAGE || strpos($attachment['mimetype'], 'image') !== 0)

- {

- $attachment['mimetype'] = (strpos(strtolower(phpbb::$user->system['browser']), 'msie') !== false || strpos(strtolower(phpbb::$user->system['browser']), 'opera') !== false) ? 'application/octetstream' : 'application/octet-stream';

- }

-

- if (@ob_get_length())

- {

- @ob_end_clean();

- }

-

- // Now send the File Contents to the Browser

- $size = @filesize($filename);

-

- // To correctly display further errors we need to make sure we are using the correct headers for both (unsetting content-length may not work)

-

- // Check if headers already sent or not able to get the file contents.

- if (headers_sent() || !@file_exists($filename) || !@is_readable($filename))

- {

- // PHP track_errors setting On?

- if (!empty($php_errormsg))

- {

- trigger_error(phpbb::$user->lang['UNABLE_TO_DELIVER_FILE'] . '<br />' . sprintf(phpbb::$user->lang['TRACKED_PHP_ERROR'], $php_errormsg));

- }

-

- trigger_error('UNABLE_TO_DELIVER_FILE');

- }

-

- // Now the tricky part... let's dance

- header('Pragma: public');

-

- /**

- * 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.

- *

- * Try X-Sendfile since it is much more server friendly - only works if the path is *not* outside of the root path...

- * lighttpd has core support for it. An apache2 module is available at http://celebnamer.celebworld.ws/stuff/mod_xsendfile/

- *

- * Not really ideal, but should work fine...

- * <code>

- * if (strpos($upload_dir, '/') !== 0 && strpos($upload_dir, '../') === false)

- * {

- * header('X-Sendfile: ' . $filename);

- * }

- * </code>

- */

-

- // Send out the Headers. Do not set Content-Disposition to inline please, it is a security measure for users using the Internet Explorer.

- $is_ie8 = (strpos(strtolower(phpbb::$user->system['browser']), 'msie 8.0') !== false);

- header('Content-Type: ' . $attachment['mimetype'] . (($is_ie8) ? '; authoritative=true;' : ''));

-

- if ($category == ATTACHMENT_CATEGORY_FLASH && request_var('view', 0) === 1)

- {

- // We use content-disposition: inline for flash files and view=1 to let it correctly play with flash player 10 - any other disposition will fail to play inline

- header('Content-Disposition: inline');

- }

- else if (empty(phpbb::$user->system['browser']) || (!$is_ie8 && (strpos(strtolower(phpbb::$user->system['browser']), 'msie') !== false)))

- {

- header('Content-Disposition: attachment; ' . header_filename(htmlspecialchars_decode($attachment['real_filename'])));

- if (empty(phpbb::$user->system['browser']) || (strpos(strtolower(phpbb::$user->system['browser']), 'msie 6.0') !== false))

- {

- header('expires: -1');

- }

- }

- else

- {

- header('Content-Disposition: ' . ((strpos($attachment['mimetype'], 'image') === 0) ? 'inline' : 'attachment') . '; ' . header_filename(htmlspecialchars_decode($attachment['real_filename'])));

- if ($is_ie8 && (strpos($attachment['mimetype'], 'image') !== 0))

- {

- header('X-Download-Options: noopen');

- }

- }

-

- if ($size)

- {

- header("Content-Length: $size");

- }

-

- // Close the db connection before sending the file

- phpbb::$db->sql_close();

-

- if (!set_modified_headers($attachment['filetime'], phpbb::$user->system['browser']))

- {

- // Try to deliver in chunks

- @set_time_limit(0);

-

- $fp = @fopen($filename, 'rb');

-

- if ($fp !== false)

- {

- while (!feof($fp))

- {

- echo fread($fp, 8192);

- }

- fclose($fp);

- }

- else

- {

- @readfile($filename);

- }

-

- flush();

- }

- file_gc();

-}

-

-/**

-* Get a browser friendly UTF-8 encoded filename

-*/

-function header_filename($file)

-{

- $user_agent = (!empty($_SERVER['HTTP_USER_AGENT'])) ? htmlspecialchars((string) $_SERVER['HTTP_USER_AGENT']) : '';

-

- // There be dragons here.

- // Not many follows the RFC...

- if (strpos($user_agent, 'MSIE') !== false || strpos($user_agent, 'Safari') !== false || strpos($user_agent, 'Konqueror') !== false)

- {

- return "filename=" . rawurlencode($file);

- }

-

- // follow the RFC for extended filename for the rest

- return "filename*=UTF-8''" . rawurlencode($file);

-}

-

-/**

-* Check if downloading item is allowed

-*/

-function download_allowed()

-{

- if (!phpbb::$config['secure_downloads'])

- {

- return true;

- }

-

- $url = (!empty($_SERVER['HTTP_REFERER'])) ? trim($_SERVER['HTTP_REFERER']) : trim(getenv('HTTP_REFERER'));

-

- if (!$url)

- {

- return (phpbb::$config['secure_allow_empty_referer']) ? true : false;

- }

-

- // Split URL into domain and script part

- $url = @parse_url($url);

-

- if ($url === false)

- {

- return (phpbb::$config['secure_allow_empty_referer']) ? true : false;

- }

-

- $hostname = $url['host'];

- unset($url);

-

- $allowed = (phpbb::$config['secure_allow_deny']) ? false : true;

- $iplist = array();

-

- if (($ip_ary = @gethostbynamel($hostname)) !== false)

- {

- foreach ($ip_ary as $ip)

- {

- if ($ip)

- {

- $iplist[] = $ip;

- }

- }

- }

-

- // Check for own server...

- $server_name = phpbb::$user->system['host'];

-

- // Forcing server vars is the only way to specify/override the protocol

- if (phpbb::$config['force_server_vars'] || !$server_name)

- {

- $server_name = phpbb::$config['server_name'];

- }

-

- if (preg_match('#^.*?' . preg_quote($server_name, '#') . '.*?$#i', $hostname))

- {

- $allowed = true;

- }

-

- // Get IP's and Hostnames

- if (!$allowed)

- {

- $sql = 'SELECT site_ip, site_hostname, ip_exclude

- FROM ' . SITELIST_TABLE;

- $result = phpbb::$db->sql_query($sql);

-

- while ($row = phpbb::$db->sql_fetchrow($result))

- {

- $site_ip = trim($row['site_ip']);

- $site_hostname = trim($row['site_hostname']);

-

- if ($site_ip)

- {

- foreach ($iplist as $ip)

- {

- if (preg_match('#^' . str_replace('\*', '.*?', preg_quote($site_ip, '#')) . '$#i', $ip))

- {

- if ($row['ip_exclude'])

- {

- $allowed = (phpbb::$config['secure_allow_deny']) ? false : true;

- break 2;

- }

- else

- {

- $allowed = (phpbb::$config['secure_allow_deny']) ? true : false;

- }

- }

- }

- }

-

- if ($site_hostname)

- {

- if (preg_match('#^' . str_replace('\*', '.*?', preg_quote($site_hostname, '#')) . '$#i', $hostname))

- {

- if ($row['ip_exclude'])

- {

- $allowed = (phpbb::$config['secure_allow_deny']) ? false : true;

- break;

- }

- else

- {

- $allowed = (phpbb::$config['secure_allow_deny']) ? true : false;

- }

- }

- }

- }

- phpbb::$db->sql_freeresult($result);

- }

-

- return $allowed;

-}

-

-/**

-* Check if the browser has the file already and set the appropriate headers-

-* @returns false if a resend is in order.

-*/

-function set_modified_headers($stamp, $browser)

-{

- // let's see if we have to send the file at all

- $last_load = isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) ? strtotime(trim($_SERVER['HTTP_IF_MODIFIED_SINCE'])) : false;

- if ((strpos(strtolower($browser), 'msie 6.0') === false) && (strpos(strtolower($browser), 'msie 8.0') === false))

- {

- if ($last_load !== false && $last_load <= $stamp)

- {

- if (substr(strtolower(@php_sapi_name()),0,3) === 'cgi')

- {

- // in theory, we shouldn't need that due to php doing it. Reality offers a differing opinion, though

- header('Status: 304 Not Modified', true, 304);

- }

- else

- {

- header('HTTP/1.0 304 Not Modified', true, 304);

- }

- // seems that we need those too ... browsers

- header('Pragma: public');

- header('Expires: ' . gmdate('D, d M Y H:i:s \G\M\T', time() + 31536000));

- return true;

- }

- else

- {

- header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $stamp) . ' GMT');

- }

- }

- return false;

-}

-

-function file_gc()

-{

- if (phpbb::registered('acm'))

- {

- phpbb::$acm->unload();

- }

-

- if (phpbb::registered('db'))

- {

- phpbb::$db->sql_close();

- }

-

- exit;

-}

-

-?> \ No newline at end of file