public function get($url)
{
$this->request = \Request::active();
$this->path = APPPATH . 'cache/pages/' . \CMF\Cache::uriCacheKey($url) . '.cache';
if (file_exists($this->path)) {
return file_get_contents($this->path);
}
return false;
}
public static function exception_handler(\Exception $e)
{
// Try and stop the cache
try {
\CMF\Cache::stop();
} catch (\Exception $e) {
}
parent::exception_handler($e);
}
public function shutdown()
{
$queries = $this->logger->queries;
$controller = $this->request->controller_instance;
$tables = array();
$subqueries = array();
$queryTables = array();
$sql = '';
// Add the template files to be checked
$template_loader = \View_Twig::loader();
if (!is_null($template_loader) && method_exists($template_loader, 'getFiles')) {
$templates = $template_loader->getFiles();
$this->files = array_unique(array_merge($this->files, $templates));
}
// Add all loaded files within the app root, excluding cache and model proxies
$this->files = array_merge($this->files, array_filter(get_included_files(), function ($path) {
return strpos($path, APPPATH) === 0 && strpos($path, APPPATH . 'cache') !== 0 && strpos($path, APPPATH . 'classes/proxy') !== 0;
}));
$model_classes = array_filter(get_declared_classes(), function ($class) {
return strpos($class, 'Model_') !== false;
});
// Construct an allowed list of tables for the cache queries
$em = \D::manager();
foreach ($model_classes as $model) {
$meta = $em->getClassMetadata($model);
if ($meta->isMappedSuperclass || !isset($meta->columnNames['updated_at']) || $meta->rootEntityName != $meta->name) {
continue;
}
if (!in_array($meta->table['name'], $tables)) {
$tables[] = $meta->table['name'];
}
}
// Remove the app path from each file path, making them relative
$this->files = array_map(function ($path) {
return str_replace(PROJECTROOT, '', $path);
}, $this->files);
// Construct ourselves a number of sub queries to check all the relevant records in the database
$num = 0;
foreach ($queries as $query) {
$parser = new \PHPSQL\Parser();
$parsed = $parser->parse($query, true);
if (!isset($parsed['FROM']) || count($parsed['FROM']) === 0) {
continue;
}
$aliases = array();
foreach ($parsed['FROM'] as $part) {
if ($part['expr_type'] == 'table' && in_array($part['table'], $tables)) {
$aliases[] = isset($part['alias']['name']) ? $part['alias']['name'] : $part['table'];
}
}
$from_pos = $parsed['FROM'][0]['position'];
if (isset($parsed['ORDER']) && count($parsed['ORDER']) > 0) {
$append = ' FROM ' . substr($query, $from_pos, $parsed['ORDER'][0]['position'] - $from_pos - 10);
} else {
$append = ' FROM ' . substr($query, $from_pos);
}
if (count($aliases) > 1) {
$append = ', (COUNT(' . implode('.id)+COUNT(', $aliases) . '.id)) as count' . $append;
} else {
if (count($aliases) === 1) {
$append = ', COUNT(' . $aliases[0] . '.id) as count' . $append;
} else {
continue;
}
}
$subqueries[] = 'q' . $num;
$queryTables[] = '(SELECT ' . (count($aliases) > 1 ? 'GREATEST(' : '') . 'COALESCE(MAX(' . implode('.updated_at),\'1000-01-01\'), COALESCE(MAX(', $aliases) . '.updated_at),\'1000-01-01\')' . (count($aliases) > 1 ? ')' : '') . ' AS updated_at' . $append . ') q' . $num;
$num++;
}
if (count($this->queries) > 0) {
foreach ($this->queries as $query) {
$parser = new \PHPSQL\Parser();
$parsed = $parser->parse($query, true);
$field = null;
if (!isset($parsed['FROM']) || count($parsed['FROM']) === 0) {
continue;
}
if (!isset($parsed['SELECT']) || count($parsed['SELECT']) === 0) {
continue;
}
foreach ($parsed['SELECT'] as $select) {
if ($select['expr_type'] == 'colref') {
$field = $select['base_expr'];
break;
}
}
if ($field === null) {
continue;
}
$aliases = array();
foreach ($parsed['FROM'] as $part) {
if ($part['expr_type'] == 'table') {
$aliases[] = isset($part['alias']['name']) ? $part['alias']['name'] : $part['table'];
}
}
$from_pos = $parsed['FROM'][0]['position'];
if (isset($parsed['ORDER']) && count($parsed['ORDER']) > 0) {
$append = ' FROM ' . substr($query, $from_pos, $parsed['ORDER'][0]['position'] - $from_pos - 10);
} else {
$append = ' FROM ' . substr($query, $from_pos);
}
if (count($aliases) > 1) {
$append = ', (COUNT(' . implode('.' . $field . ')+COUNT(', $aliases) . '.' . $field . ')) as count' . $append;
} else {
if (count($aliases) === 1) {
$append = ', COUNT(' . $aliases[0] . '.' . $field . ') as count' . $append;
} else {
continue;
}
}
$subqueries[] = 'q' . $num;
$queryTables[] = '(SELECT ' . (count($aliases) > 1 ? 'GREATEST(' : '') . 'COALESCE(MAX(' . implode('.' . $field . '),\'1000-01-01\'), COALESCE(MAX(', $aliases) . '.' . $field . '),\'1000-01-01\')' . (count($aliases) > 1 ? ')' : '') . ' AS updated_at' . $append . ') q' . $num;
$num++;
}
}
if (count($queryTables)) {
// TODO: proper chunking of subqueries! For now, we will truncate them if they exeed MySQL's limit of 61
if (count($queryTables) > 60) {
$queryTables = array_slice($queryTables, 0, 60);
$subqueries = array_slice($subqueries, 0, 60);
}
// Complete the mega query that will check if items are updated or not...
if (count($subqueries) > 1) {
$sql = 'SELECT GREATEST(' . implode('.updated_at, ', $subqueries) . '.updated_at) AS updated_at, (' . implode('.count+', $subqueries) . '.count) AS count FROM ' . implode(', ', $queryTables);
} else {
$sql = 'SELECT q0.updated_at, q0.count FROM ' . implode(', ', $queryTables);
}
// Run the query - this must be done now because we can't reliably get the correct results from what we have
try {
$result = \DB::query($sql)->execute()->as_array();
$result = $result[0];
$result['updated_at'] = strtotime($result['updated_at']);
} catch (\Exception $e) {
// We can't continue if the query doesn't work
return;
}
}
// Add the rest of the stuff to the result
$result['query_count'] = $num;
$result['sql'] = $sql;
$result['files'] = $this->files;
$result['content'] = strval($this->request->response);
$result['nocache'] = \CMF\Cache::getNoCacheAreas($result['content']);
$result['logs_made'] = \CMF\Log::$logs_made;
$result['content-type'] = 'text/html; charset=utf-8';
$result['template'] = \CMF::$template;
$result['module'] = \CMF::$module;
// Store the content type header if it's set
$headers = headers_list();
foreach ($headers as $header) {
if (stripos($header, 'content-type: ') === 0) {
$result['content-type'] = substr($header, 14);
break;
}
}
// serialize and write it to disk
\CMF\Cache::writeCacheFile($this->path, serialize($result));
}