This method loads the full Elgg engine, checks the installation
state, and triggers a series of events to finish booting Elgg:
- {@elgg_event boot system}
- {@elgg_event init system}
- {@elgg_event ready system}
If Elgg is not fully installed, the browser will be redirected to an installation page.
/**
* Handle a request for a cached view
*
* @param array $path URL path
* @return void
*/
public function handleRequest($path)
{
$config = $this->config;
$request = $this->parsePath($path);
if (!$request) {
$this->send403();
}
$ts = $request['ts'];
$view = $request['view'];
$viewtype = $request['viewtype'];
$contentType = $this->getContentType($view);
if (!empty($contentType)) {
header("Content-Type: {$contentType}", true);
}
// this may/may not have to connect to the DB
$this->setupSimplecache();
// we can't use $config->get yet. It fails before the core is booted
if (!$config->getVolatile('simplecache_enabled')) {
$this->application->bootCore();
if (!\_elgg_is_view_cacheable($view)) {
$this->send403();
} else {
echo $this->renderView($view, $viewtype);
}
exit;
}
$etag = "\"{$ts}\"";
// If is the same ETag, content didn't change.
if (isset($this->server_vars['HTTP_IF_NONE_MATCH']) && trim($this->server_vars['HTTP_IF_NONE_MATCH']) === $etag) {
header("HTTP/1.1 304 Not Modified");
exit;
}
$filename = $config->getVolatile('dataroot') . 'views_simplecache/' . md5("{$viewtype}|{$view}");
if (file_exists($filename)) {
$this->sendCacheHeaders($etag);
readfile($filename);
exit;
}
$this->application->bootCore();
elgg_set_viewtype($viewtype);
if (!\_elgg_is_view_cacheable($view)) {
$this->send403();
}
$cache_timestamp = (int) $config->get('lastcache');
if ($cache_timestamp == $ts) {
$this->sendCacheHeaders($etag);
$content = $this->getProcessedView($view, $viewtype);
$dir_name = $config->getDataPath() . 'views_simplecache/';
if (!is_dir($dir_name)) {
mkdir($dir_name, 0700);
}
file_put_contents($filename, $content);
} else {
// if wrong timestamp, don't send HTTP cache
$content = $this->renderView($view, $viewtype);
}
echo $content;
exit;
}
/**
* Handle a request for a file
*
* @param Request $request HTTP request
* @return Response
*/
public function getResponse($request)
{
$response = new Response();
$response->prepare($request);
$path = implode('/', $request->getUrlSegments());
if (!preg_match('~serve-file/e(\\d+)/l(\\d+)/d([ia])/c([01])/([a-zA-Z0-9\\-_]+)/(.*)$~', $path, $m)) {
return $response->setStatusCode(400)->setContent('Malformatted request URL');
}
list(, $expires, $last_updated, $disposition, $use_cookie, $mac, $path_from_dataroot) = $m;
if ($expires && $expires < time()) {
return $response->setStatusCode(403)->setContent('URL has expired');
}
$etag = '"' . $last_updated . '"';
$response->setPublic()->setEtag($etag);
if ($response->isNotModified($request)) {
return $response;
}
// @todo: change to minimal boot without plugins
$this->application->bootCore();
$hmac_data = array('expires' => (int) $expires, 'last_updated' => (int) $last_updated, 'disposition' => $disposition, 'path' => $path_from_dataroot, 'use_cookie' => (int) $use_cookie);
if ((bool) $use_cookie) {
$hmac_data['cookie'] = _elgg_services()->session->getId();
}
ksort($hmac_data);
$hmac = elgg_build_hmac($hmac_data);
if (!$hmac->matchesToken($mac)) {
return $response->setStatusCode(403)->setContent('HMAC mistmatch');
}
$dataroot = _elgg_services()->config->getDataPath();
$filenameonfilestore = "{$dataroot}{$path_from_dataroot}";
if (!is_readable($filenameonfilestore)) {
return $response->setStatusCode(404)->setContent('File not found');
}
$actual_last_updated = filemtime($filenameonfilestore);
if ($actual_last_updated != $last_updated) {
return $response->setStatusCode(403)->setContent('URL has expired');
}
$public = $use_cookie ? false : true;
$content_disposition = $disposition == 'i' ? 'inline' : 'attachment';
$response = new BinaryFileResponse($filenameonfilestore, 200, array(), $public, $content_disposition);
$response->prepare($request);
if (empty($expires)) {
$expires = strtotime('+1 year');
}
$expires_dt = (new DateTime())->setTimestamp($expires);
$response->setExpires($expires_dt);
$response->setEtag($etag);
return $response;
}
/**
* Handle a request for a cached view
*
* @param array $path URL path
* @return void
*/
public function handleRequest($path)
{
$config = $this->config;
$request = $this->parsePath($path);
if (!$request) {
$this->send403();
}
$ts = $request['ts'];
$view = $request['view'];
$viewtype = $request['viewtype'];
$contentType = $this->getContentType($view);
if (empty($contentType)) {
$this->send403("Asset must have a valid file extension");
}
header("Content-Type: {$contentType}", true);
// this may/may not have to connect to the DB
$this->setupSimplecache();
// we can't use $config->get yet. It fails before the core is booted
if (!$config->getVolatile('simplecache_enabled')) {
$this->application->bootCore();
if (!$this->isCacheableView($view)) {
$this->send403("Requested view is not an asset");
} else {
$content = $this->renderView($view, $viewtype);
$etag = '"' . md5($content) . '"';
$this->sendRevalidateHeaders($etag);
$this->handle304($etag);
echo $content;
}
exit;
}
$etag = "\"{$ts}\"";
$this->handle304($etag);
// trust the client but check for an existing cache file
$filename = $config->getVolatile('dataroot') . "views_simplecache/{$ts}/{$viewtype}/{$view}";
if (file_exists($filename)) {
$this->sendCacheHeaders($etag);
readfile($filename);
exit;
}
// the hard way
$this->application->bootCore();
elgg_set_viewtype($viewtype);
if (!$this->isCacheableView($view)) {
$this->send403("Requested view is not an asset");
}
$lastcache = (int) $config->get('lastcache');
$filename = $config->getVolatile('dataroot') . "views_simplecache/{$lastcache}/{$viewtype}/{$view}";
if ($lastcache == $ts) {
$this->sendCacheHeaders($etag);
$content = $this->getProcessedView($view, $viewtype);
$dir_name = dirname($filename);
if (!is_dir($dir_name)) {
mkdir($dir_name, 0700, true);
}
file_put_contents($filename, $content);
} else {
// if wrong timestamp, don't send HTTP cache
$content = $this->renderView($view, $viewtype);
}
echo $content;
exit;
}