* * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Templating\Loader; use Symfony\Component\Templating\Storage\Storage; use Symfony\Component\Templating\Storage\FileStorage; use Symfony\Component\Templating\TemplateReferenceInterface; /** * CacheLoader is a loader that caches other loaders responses * on the filesystem. * * This cache only caches on disk to allow PHP accelerators to cache the opcodes. * All other mechanism would imply the use of `eval()`. * * @author Fabien Potencier */ class CacheLoader extends Loader { protected $loader; protected $dir; /** * Constructor. * * @param LoaderInterface $loader A Loader instance * @param string $dir The directory where to store the cache files */ public function __construct(LoaderInterface $loader, $dir) { $this->loader = $loader; $this->dir = $dir; } /** * Loads a template. * * @param TemplateReferenceInterface $template A template * * @return Storage|Boolean false if the template cannot be loaded, a Storage instance otherwise */ public function load(TemplateReferenceInterface $template) { $key = hash('sha256', $template->getLogicalName()); $dir = $this->dir.DIRECTORY_SEPARATOR.substr($key, 0, 2); $file = substr($key, 2).'.tpl'; $path = $dir.DIRECTORY_SEPARATOR.$file; if (is_file($path)) { if (null !== $this->logger) { $this->logger->debug(sprintf('Fetching template "%s" from cache', $template->get('name'))); } elseif (null !== $this->debugger) { // just for BC, to be removed in 3.0 $this->debugger->log(sprintf('Fetching template "%s" from cache', $template->get('name'))); } return new FileStorage($path); } if (false === $storage = $this->loader->load($template)) { return false; } $content = $storage->getContent(); if (!is_dir($dir)) { mkdir($dir, 0777, true); } file_put_contents($path, $content); if (null !== $this->logger) { $this->logger->debug(sprintf('Storing template "%s" in cache', $template->get('name'))); } elseif (null !== $this->debugger) { // just for BC, to be removed in 3.0 $this->debugger->log(sprintf('Storing template "%s" in cache', $template->get('name'))); } return new FileStorage($path); } /** * Returns true if the template is still fresh. * * @param TemplateReferenceInterface $template A template * @param integer $time The last modification time of the cached template (timestamp) * * @return Boolean */ public function isFresh(TemplateReferenceInterface $template, $time) { return $this->loader->isFresh($template, $time); } }