/**
* The output buffer callback used to capture the output and cache it.
*
* @see StaticCache::init()
* @param string $buffer The output buffer contents
* @return string $buffer unchanged
*/
public static function store_final_output($buffer)
{
// prevent caching of 404 responses
if (!URL::get_matched_rule() || URL::get_matched_rule()->name == 'display_404') {
return $buffer;
}
$request_id = StaticCache::get_request_id();
$query_id = StaticCache::get_query_id();
$expire = Options::get('staticcache__expire', StaticCache::EXPIRE);
// get cache if exists
if (Cache::has(array(StaticCache::GROUP_NAME, $request_id))) {
$cache = Cache::get(array(StaticCache::GROUP_NAME, $request_id));
} else {
$cache = array();
}
// don't cache cookie headers (ie. session cookies)
$headers = headers_list();
foreach ($headers as $i => $head) {
if (stripos($head, 'cookie') !== false) {
unset($headers[$i]);
}
}
// see if we want compression and store cache
$cache[$query_id] = array('headers' => $headers, 'request_uri' => Site::get_url('host') . $_SERVER['REQUEST_URI']);
if (Options::get('staticcache__compress') && extension_loaded('zlib')) {
$cache[$query_id]['body'] = gzcompress($buffer, StaticCache::GZ_COMPRESSION);
$cache[$query_id]['compressed'] = true;
} else {
$cache[$query_id]['body'] = $buffer;
$cache[$query_id]['compressed'] = false;
}
Cache::set(array(StaticCache::GROUP_NAME, $request_id), $cache, $expire);
return $buffer;
}
