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php-phpbb/phpBB/style.php
Josh Woody c40b2c7601 [ticket/9629] Allow style.php to retrieve its session ID from cookies
style.php takes a session ID to ensure it gets the right language for a user,
but that session ID is always passed in GET. This allows change allows the SID
to be read from the cookie, and theoretically makes it friendlier for caching
engines like Varnish.

PHPBB3-9629
2010-07-11 01:35:01 +02:00

304 lines
8.1 KiB
PHP

<?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);
$phpbb_root_path = (defined('PHPBB_ROOT_PATH')) ? PHPBB_ROOT_PATH : './';
$phpEx = substr(strrchr(__FILE__, '.'), 1);
// Report all errors, except notices and deprecation messages
if (!defined('E_DEPRECATED'))
{
define('E_DEPRECATED', 8192);
}
error_reporting(E_ALL ^ E_NOTICE ^ E_DEPRECATED);
require($phpbb_root_path . 'config.' . $phpEx);
if (!defined('PHPBB_INSTALLED') || empty($dbms) || empty($acm_type))
{
exit;
}
if (version_compare(PHP_VERSION, '6.0.0-dev', '<'))
{
@set_magic_quotes_runtime(0);
}
// Load Extensions
if (!empty($load_extensions) && function_exists('dl'))
{
$load_extensions = explode(',', $load_extensions);
foreach ($load_extensions as $extension)
{
@dl(trim($extension));
}
}
$id = (isset($_GET['id'])) ? intval($_GET['id']) : 0;
// This is a simple script to grab and output the requested CSS data stored in the DB
// We include a session_id check to try and limit 3rd party linking ... unless they
// happen to have a current session it will output nothing. We will also cache the
// resulting CSS data for five minutes ... anything to reduce the load on the SQL
// server a little
if ($id)
{
// Include files
require($phpbb_root_path . 'includes/acm/acm_' . $acm_type . '.' . $phpEx);
require($phpbb_root_path . 'includes/cache.' . $phpEx);
require($phpbb_root_path . 'includes/db/' . $dbms . '.' . $phpEx);
require($phpbb_root_path . 'includes/constants.' . $phpEx);
require($phpbb_root_path . 'includes/functions.' . $phpEx);
$db = new $sql_db();
$cache = new cache();
// Connect to DB
if (!@$db->sql_connect($dbhost, $dbuser, $dbpasswd, $dbname, $dbport, false, false))
{
exit;
}
unset($dbpasswd);
$config = $cache->obtain_config();
$user = false;
// try to get a session ID from REQUEST array
$sid = request_var('sid', '');
if (!$sid)
{
// if that failed, then look in the cookies
$sid = request_var($config['cookie_name'] . '_sid', '', false, true);
}
if (strspn($sid, 'abcdefABCDEF0123456789') !== strlen($sid))
{
$sid = '';
}
if ($sid)
{
$sql = 'SELECT u.user_id, u.user_lang
FROM ' . SESSIONS_TABLE . ' s, ' . USERS_TABLE . " u
WHERE s.session_id = '" . $db->sql_escape($sid) . "'
AND s.session_user_id = u.user_id";
$result = $db->sql_query($sql);
$user = $db->sql_fetchrow($result);
$db->sql_freeresult($result);
}
$recompile = $config['load_tplcompile'];
if (!$user)
{
$id = ($id) ? $id : $config['default_style'];
// Commented out because calls do not always include the SID anymore
// $recompile = false;
$user = array('user_id' => ANONYMOUS);
}
$sql = 'SELECT s.style_id, c.theme_id, c.theme_data, c.theme_path, c.theme_name, c.theme_mtime, i.*, t.template_path
FROM ' . STYLES_TABLE . ' s, ' . STYLES_TEMPLATE_TABLE . ' t, ' . STYLES_THEME_TABLE . ' c, ' . STYLES_IMAGESET_TABLE . ' i
WHERE s.style_id = ' . $id . '
AND t.template_id = s.template_id
AND c.theme_id = s.theme_id
AND i.imageset_id = s.imageset_id';
$result = $db->sql_query($sql, 300);
$theme = $db->sql_fetchrow($result);
$db->sql_freeresult($result);
if (!$theme)
{
exit;
}
if ($user['user_id'] == ANONYMOUS)
{
$user['user_lang'] = $config['default_lang'];
}
$user_image_lang = (file_exists($phpbb_root_path . 'styles/' . $theme['imageset_path'] . '/imageset/' . $user['user_lang'])) ? $user['user_lang'] : $config['default_lang'];
// Same query in session.php
$sql = 'SELECT *
FROM ' . STYLES_IMAGESET_DATA_TABLE . '
WHERE imageset_id = ' . $theme['imageset_id'] . "
AND image_filename <> ''
AND image_lang IN ('" . $db->sql_escape($user_image_lang) . "', '')";
$result = $db->sql_query($sql, 3600);
$img_array = array();
while ($row = $db->sql_fetchrow($result))
{
$img_array[$row['image_name']] = $row;
}
$db->sql_freeresult($result);
// gzip_compression
if ($config['gzip_compress'])
{
// IE6 is not able to compress the style (do not ask us why!)
$browser = (!empty($_SERVER['HTTP_USER_AGENT'])) ? strtolower(htmlspecialchars((string) $_SERVER['HTTP_USER_AGENT'])) : '';
if ($browser && strpos($browser, 'msie 6.0') === false && @extension_loaded('zlib') && !headers_sent())
{
ob_start('ob_gzhandler');
}
}
// Expire time of seven days if not recached
$expire_time = 7*86400;
$recache = false;
// Re-cache stylesheet data if necessary
if ($recompile || empty($theme['theme_data']))
{
$recache = (empty($theme['theme_data'])) ? true : false;
$update_time = time();
// We test for stylesheet.css because it is faster and most likely the only file changed on common themes
if (!$recache && $theme['theme_mtime'] < @filemtime("{$phpbb_root_path}styles/" . $theme['theme_path'] . '/theme/stylesheet.css'))
{
$recache = true;
$update_time = @filemtime("{$phpbb_root_path}styles/" . $theme['theme_path'] . '/theme/stylesheet.css');
}
else if (!$recache)
{
$last_change = $theme['theme_mtime'];
$dir = @opendir("{$phpbb_root_path}styles/{$theme['theme_path']}/theme");
if ($dir)
{
while (($entry = readdir($dir)) !== false)
{
if (substr(strrchr($entry, '.'), 1) == 'css' && $last_change < @filemtime("{$phpbb_root_path}styles/{$theme['theme_path']}/theme/{$entry}"))
{
$recache = true;
break;
}
}
closedir($dir);
}
}
}
if ($recache)
{
include_once($phpbb_root_path . 'includes/acp/acp_styles.' . $phpEx);
$theme['theme_data'] = acp_styles::db_theme_data($theme);
$theme['theme_mtime'] = $update_time;
// Save CSS contents
$sql_ary = array(
'theme_mtime' => $theme['theme_mtime'],
'theme_data' => $theme['theme_data']
);
$sql = 'UPDATE ' . STYLES_THEME_TABLE . ' SET ' . $db->sql_build_array('UPDATE', $sql_ary) . "
WHERE theme_id = {$theme['theme_id']}";
$db->sql_query($sql);
$cache->destroy('sql', STYLES_THEME_TABLE);
}
// Only set the expire time if the theme changed data is older than 30 minutes - to cope with changes from the ACP
if ($recache || $theme['theme_mtime'] > (time() - 1800))
{
header('Expires: 0');
}
else
{
header('Expires: ' . gmdate('D, d M Y H:i:s \G\M\T', time() + $expire_time));
}
header('Content-type: text/css; charset=UTF-8');
// Parse Theme Data
$replace = array(
'{T_THEME_PATH}' => "{$phpbb_root_path}styles/" . $theme['theme_path'] . '/theme',
'{T_TEMPLATE_PATH}' => "{$phpbb_root_path}styles/" . $theme['template_path'] . '/template',
'{T_IMAGESET_PATH}' => "{$phpbb_root_path}styles/" . $theme['imageset_path'] . '/imageset',
'{T_IMAGESET_LANG_PATH}' => "{$phpbb_root_path}styles/" . $theme['imageset_path'] . '/imageset/' . $user_image_lang,
'{T_STYLESHEET_NAME}' => $theme['theme_name'],
'{S_USER_LANG}' => $user['user_lang']
);
$theme['theme_data'] = str_replace(array_keys($replace), array_values($replace), $theme['theme_data']);
$matches = array();
preg_match_all('#\{IMG_([A-Za-z0-9_]*?)_(WIDTH|HEIGHT|SRC)\}#', $theme['theme_data'], $matches);
$imgs = $find = $replace = array();
if (isset($matches[0]) && sizeof($matches[0]))
{
foreach ($matches[1] as $i => $img)
{
$img = strtolower($img);
$find[] = $matches[0][$i];
if (!isset($img_array[$img]))
{
$replace[] = '';
continue;
}
if (!isset($imgs[$img]))
{
$img_data = &$img_array[$img];
$imgsrc = ($img_data['image_lang'] ? $img_data['image_lang'] . '/' : '') . $img_data['image_filename'];
$imgs[$img] = array(
'src' => $phpbb_root_path . 'styles/' . $theme['imageset_path'] . '/imageset/' . $imgsrc,
'width' => $img_data['image_width'],
'height' => $img_data['image_height'],
);
}
switch ($matches[2][$i])
{
case 'SRC':
$replace[] = $imgs[$img]['src'];
break;
case 'WIDTH':
$replace[] = $imgs[$img]['width'];
break;
case 'HEIGHT':
$replace[] = $imgs[$img]['height'];
break;
default:
continue;
}
}
if (sizeof($find))
{
$theme['theme_data'] = str_replace($find, $replace, $theme['theme_data']);
}
}
echo $theme['theme_data'];
if (!empty($cache))
{
$cache->unload();
}
$db->sql_close();
}
exit;
?>