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Kernel.php
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<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\HttpKernel; use Symfony\Bridge\ProxyManager\LazyProxy\Instantiator\RuntimeInstantiator; use Symfony\Bridge\ProxyManager\LazyProxy\PhpDumper\ProxyDumper; use Symfony\Component\DependencyInjection\ContainerInterface; use Symfony\Component\DependencyInjection\ContainerBuilder; use Symfony\Component\DependencyInjection\Dumper\PhpDumper; use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag; use Symfony\Component\DependencyInjection\Loader\XmlFileLoader; use Symfony\Component\DependencyInjection\Loader\YamlFileLoader; use Symfony\Component\DependencyInjection\Loader\IniFileLoader; use Symfony\Component\DependencyInjection\Loader\PhpFileLoader; use Symfony\Component\DependencyInjection\Loader\ClosureLoader; use Symfony\Component\HttpFoundation\Request; use Symfony\Component\HttpFoundation\Response; use Symfony\Component\HttpKernel\Bundle\BundleInterface; use Symfony\Component\HttpKernel\Config\FileLocator; use Symfony\Component\HttpKernel\DependencyInjection\MergeExtensionConfigurationPass; use Symfony\Component\HttpKernel\DependencyInjection\AddClassesToCachePass; use Symfony\Component\Config\Loader\LoaderResolver; use Symfony\Component\Config\Loader\DelegatingLoader; use Symfony\Component\Config\ConfigCache; use Symfony\Component\ClassLoader\ClassCollectionLoader; /** * The Kernel is the heart of the Symfony system. * * It manages an environment made of bundles. * * @author Fabien Potencier <fabien@symfony.com> * * @api */ abstract class Kernel implements KernelInterface, TerminableInterface { /** * @var BundleInterface[] */ protected $bundles = array(); protected $bundleMap; protected $container; protected $rootDir; protected $environment; protected $debug; protected $booted = false; protected $name; protected $startTime; protected $loadClassCache; const VERSION = '2.4.3'; const VERSION_ID = '20403'; const MAJOR_VERSION = '2'; const MINOR_VERSION = '4'; const RELEASE_VERSION = '3'; const EXTRA_VERSION = ''; /** * Constructor. * * @param string $environment The environment * @param Boolean $debug Whether to enable debugging or not * * @api */ public function __construct($environment, $debug) { $this->environment = $environment; $this->debug = (Boolean) $debug; $this->rootDir = $this->getRootDir(); $this->name = $this->getName(); if ($this->debug) { $this->startTime = microtime(true); } $this->init(); } /** * @deprecated Deprecated since version 2.3, to be removed in 3.0. Move your logic in the constructor instead. */ public function init() { } public function __clone() { if ($this->debug) { $this->startTime = microtime(true); } $this->booted = false; $this->container = null; } /** * Boots the current kernel. * * @api */ public function boot() { if (true === $this->booted) { return; } if ($this->loadClassCache) { $this->doLoadClassCache($this->loadClassCache[0], $this->loadClassCache[1]); } // init bundles $this->initializeBundles(); // init container $this->initializeContainer(); foreach ($this->getBundles() as $bundle) { $bundle->setContainer($this->container); $bundle->boot(); } $this->booted = true; } /** * {@inheritdoc} * * @api */ public function terminate(Request $request, Response $response) { if (false === $this->booted) { return; } if ($this->getHttpKernel() instanceof TerminableInterface) { $this->getHttpKernel()->terminate($request, $response); } } /** * {@inheritdoc} * * @api */ public function shutdown() { if (false === $this->booted) { return; } $this->booted = false; foreach ($this->getBundles() as $bundle) { $bundle->shutdown(); $bundle->setContainer(null); } $this->container = null; } /** * {@inheritdoc} * * @api */ public function handle(Request $request, $type = HttpKernelInterface::MASTER_REQUEST, $catch = true) { if (false === $this->booted) { $this->boot(); } return $this->getHttpKernel()->handle($request, $type, $catch); } /** * Gets a HTTP kernel from the container * * @return HttpKernel */ protected function getHttpKernel() { return $this->container->get('http_kernel'); } /** * {@inheritdoc} * * @api */ public function getBundles() { return $this->bundles; } /** * {@inheritdoc} * * @api */ public function isClassInActiveBundle($class) { foreach ($this->getBundles() as $bundle) { if (0 === strpos($class, $bundle->getNamespace())) { return true; } } return false; } /** * {@inheritdoc} * * @api */ public function getBundle($name, $first = true) { if (!isset($this->bundleMap[$name])) { throw new \InvalidArgumentException(sprintf('Bundle "%s" does not exist or it is not enabled. Maybe you forgot to add it in the registerBundles() method of your %s.php file?', $name, get_class($this))); } if (true === $first) { return $this->bundleMap[$name][0]; } return $this->bundleMap[$name]; } /** * Returns the file path for a given resource. * * A Resource can be a file or a directory. * * The resource name must follow the following pattern: * * @<BundleName>/path/to/a/file.something * * where BundleName is the name of the bundle * and the remaining part is the relative path in the bundle. * * If $dir is passed, and the first segment of the path is "Resources", * this method will look for a file named: * * $dir/<BundleName>/path/without/Resources * * before looking in the bundle resource folder. * * @param string $name A resource name to locate * @param string $dir A directory where to look for the resource first * @param Boolean $first Whether to return the first path or paths for all matching bundles * * @return string|array The absolute path of the resource or an array if $first is false * * @throws \InvalidArgumentException if the file cannot be found or the name is not valid * @throws \RuntimeException if the name contains invalid/unsafe * @throws \RuntimeException if a custom resource is hidden by a resource in a derived bundle * * @api */ public function locateResource($name, $dir = null, $first = true) { if ('@' !== $name[0]) { throw new \InvalidArgumentException(sprintf('A resource name must start with @ ("%s" given).', $name)); } if (false !== strpos($name, '..')) { throw new \RuntimeException(sprintf('File name "%s" contains invalid characters (..).', $name)); } $bundleName = substr($name, 1); $path = ''; if (false !== strpos($bundleName, '/')) { list($bundleName, $path) = explode('/', $bundleName, 2); } $isResource = 0 === strpos($path, 'Resources') && null !== $dir; $overridePath = substr($path, 9); $resourceBundle = null; $bundles = $this->getBundle($bundleName, false); $files = array(); foreach ($bundles as $bundle) { if ($isResource && file_exists($file = $dir.'/'.$bundle->getName().$overridePath)) { if (null !== $resourceBundle) { throw new \RuntimeException(sprintf('"%s" resource is hidden by a resource from the "%s" derived bundle. Create a "%s" file to override the bundle resource.', $file, $resourceBundle, $dir.'/'.$bundles[0]->getName().$overridePath )); } if ($first) { return $file; } $files[] = $file; } if (file_exists($file = $bundle->getPath().'/'.$path)) { if ($first && !$isResource) { return $file; } $files[] = $file; $resourceBundle = $bundle->getName(); } } if (count($files) > 0) { return $first && $isResource ? $files[0] : $files; } throw new \InvalidArgumentException(sprintf('Unable to find file "%s".', $name)); } /** * {@inheritdoc} * * @api */ public function getName() { if (null === $this->name) { $this->name = preg_replace('/[^a-zA-Z0-9_]+/', '', basename($this->rootDir)); } return $this->name; } /** * {@inheritdoc} * * @api */ public function getEnvironment() { return $this->environment; } /** * {@inheritdoc} * * @api */ public function isDebug() { return $this->debug; } /** * {@inheritdoc} * * @api */ public function getRootDir() { if (null === $this->rootDir) { $r = new \ReflectionObject($this); $this->rootDir = str_replace('\\', '/', dirname($r->getFileName())); } return $this->rootDir; } /** * {@inheritdoc} * * @api */ public function getContainer() { return $this->container; } /** * Loads the PHP class cache. * * This methods only registers the fact that you want to load the cache classes. * The cache will actually only be loaded when the Kernel is booted. * * That optimization is mainly useful when using the HttpCache class in which * case the class cache is not loaded if the Response is in the cache. * * @param string $name The cache name prefix * @param string $extension File extension of the resulting file */ public function loadClassCache($name = 'classes', $extension = '.php') { $this->loadClassCache = array($name, $extension); } /** * Used internally. */ public function setClassCache(array $classes) { file_put_contents($this->getCacheDir().'/classes.map', sprintf('<?php return %s;', var_export($classes, true))); } /** * {@inheritdoc} * * @api */ public function getStartTime() { return $this->debug ? $this->startTime : -INF; } /** * {@inheritdoc} * * @api */ public function getCacheDir() { return $this->rootDir.'/cache/'.$this->environment; } /** * {@inheritdoc} * * @api */ public function getLogDir() { return $this->rootDir.'/logs'; } /** * {@inheritdoc} * * @api */ public function getCharset() { return 'UTF-8'; } protected function doLoadClassCache($name, $extension) { if (!$this->booted && is_file($this->getCacheDir().'/classes.map')) { ClassCollectionLoader::load(include($this->getCacheDir().'/classes.map'), $this->getCacheDir(), $name, $this->debug, false, $extension); } } /** * Initializes the data structures related to the bundle management. * * - the bundles property maps a bundle name to the bundle instance, * - the bundleMap property maps a bundle name to the bundle inheritance hierarchy (most derived bundle first). * * @throws \LogicException if two bundles share a common name * @throws \LogicException if a bundle tries to extend a non-registered bundle * @throws \LogicException if a bundle tries to extend itself * @throws \LogicException if two bundles extend the same ancestor */ protected function initializeBundles() { // init bundles $this->bundles = array(); $topMostBundles = array(); $directChildren = array(); foreach ($this->registerBundles() as $bundle) { $name = $bundle->getName(); if (isset($this->bundles[$name])) { throw new \LogicException(sprintf('Trying to register two bundles with the same name "%s"', $name)); } $this->bundles[$name] = $bundle; if ($parentName = $bundle->getParent()) { if (isset($directChildren[$parentName])) { throw new \LogicException(sprintf('Bundle "%s" is directly extended by two bundles "%s" and "%s".', $parentName, $name, $directChildren[$parentName])); } if ($parentName == $name) { throw new \LogicException(sprintf('Bundle "%s" can not extend itself.', $name)); } $directChildren[$parentName] = $name; } else { $topMostBundles[$name] = $bundle; } } // look for orphans if (!empty($directChildren) && count($diff = array_diff_key($directChildren, $this->bundles))) { $diff = array_keys($diff); throw new \LogicException(sprintf('Bundle "%s" extends bundle "%s", which is not registered.', $directChildren[$diff[0]], $diff[0])); } // inheritance $this->bundleMap = array(); foreach ($topMostBundles as $name => $bundle) { $bundleMap = array($bundle); $hierarchy = array($name); while (isset($directChildren[$name])) { $name = $directChildren[$name]; array_unshift($bundleMap, $this->bundles[$name]); $hierarchy[] = $name; } foreach ($hierarchy as $bundle) { $this->bundleMap[$bundle] = $bundleMap; array_pop($bundleMap); } } } /** * Gets the container class. * * @return string The container class */ protected function getContainerClass() { return $this->name.ucfirst($this->environment).($this->debug ? 'Debug' : '').'ProjectContainer'; } /** * Gets the container's base class. * * All names except Container must be fully qualified. * * @return string */ protected function getContainerBaseClass() { return 'Container'; } /** * Initializes the service container. * * The cached version of the service container is used when fresh, otherwise the * container is built. */ protected function initializeContainer() { $class = $this->getContainerClass(); $cache = new ConfigCache($this->getCacheDir().'/'.$class.'.php', $this->debug); $fresh = true; if (!$cache->isFresh()) { $container = $this->buildContainer(); $container->compile(); $this->dumpContainer($cache, $container, $class, $this->getContainerBaseClass()); $fresh = false; } require_once $cache; $this->container = new $class(); $this->container->set('kernel', $this); if (!$fresh && $this->container->has('cache_warmer')) { $this->container->get('cache_warmer')->warmUp($this->container->getParameter('kernel.cache_dir')); } } /** * Returns the kernel parameters. * * @return array An array of kernel parameters */ protected function getKernelParameters() { $bundles = array(); foreach ($this->bundles as $name => $bundle) { $bundles[$name] = get_class($bundle); } return array_merge( array( 'kernel.root_dir' => $this->rootDir, 'kernel.environment' => $this->environment, 'kernel.debug' => $this->debug, 'kernel.name' => $this->name, 'kernel.cache_dir' => $this->getCacheDir(), 'kernel.logs_dir' => $this->getLogDir(), 'kernel.bundles' => $bundles, 'kernel.charset' => $this->getCharset(), 'kernel.container_class' => $this->getContainerClass(), ), $this->getEnvParameters() ); } /** * Gets the environment parameters. * * Only the parameters starting with "SYMFONY__" are considered. * * @return array An array of parameters */ protected function getEnvParameters() { $parameters = array(); foreach ($_SERVER as $key => $value) { if (0 === strpos($key, 'SYMFONY__')) { $parameters[strtolower(str_replace('__', '.', substr($key, 9)))] = $value; } } return $parameters; } /** * Builds the service container. * * @return ContainerBuilder The compiled service container * * @throws \RuntimeException */ protected function buildContainer() { foreach (array('cache' => $this->getCacheDir(), 'logs' => $this->getLogDir()) as $name => $dir) { if (!is_dir($dir)) { if (false === @mkdir($dir, 0777, true)) { throw new \RuntimeException(sprintf("Unable to create the %s directory (%s)\n", $name, $dir)); } } elseif (!is_writable($dir)) { throw new \RuntimeException(sprintf("Unable to write in the %s directory (%s)\n", $name, $dir)); } } $container = $this->getContainerBuilder(); $container->addObjectResource($this); $this->prepareContainer($container); if (null !== $cont = $this->registerContainerConfiguration($this->getContainerLoader($container))) { $container->merge($cont); } $container->addCompilerPass(new AddClassesToCachePass($this)); return $container; } /** * Prepares the ContainerBuilder before it is compiled. * * @param ContainerBuilder $container A ContainerBuilder instance */ protected function prepareContainer(ContainerBuilder $container) { $extensions = array(); foreach ($this->bundles as $bundle) { if ($extension = $bundle->getContainerExtension()) { $container->registerExtension($extension); $extensions[] = $extension->getAlias(); } if ($this->debug) { $container->addObjectResource($bundle); } } foreach ($this->bundles as $bundle) { $bundle->build($container); } // ensure these extensions are implicitly loaded $container->getCompilerPassConfig()->setMergePass(new MergeExtensionConfigurationPass($extensions)); } /** * Gets a new ContainerBuilder instance used to build the service container. * * @return ContainerBuilder */ protected function getContainerBuilder() { $container = new ContainerBuilder(new ParameterBag($this->getKernelParameters())); if (class_exists('ProxyManager\Configuration')) { $container->setProxyInstantiator(new RuntimeInstantiator()); } return $container; } /** * Dumps the service container to PHP code in the cache. * * @param ConfigCache $cache The config cache * @param ContainerBuilder $container The service container * @param string $class The name of the class to generate * @param string $baseClass The name of the container's base class */ protected function dumpContainer(ConfigCache $cache, ContainerBuilder $container, $class, $baseClass) { // cache the container $dumper = new PhpDumper($container); if (class_exists('ProxyManager\Configuration')) { $dumper->setProxyDumper(new ProxyDumper()); } $content = $dumper->dump(array('class' => $class, 'base_class' => $baseClass)); if (!$this->debug) { $content = static::stripComments($content); } $cache->write($content, $container->getResources()); } /** * Returns a loader for the container. * * @param ContainerInterface $container The service container * * @return DelegatingLoader The loader */ protected function getContainerLoader(ContainerInterface $container) { $locator = new FileLocator($this); $resolver = new LoaderResolver(array( new XmlFileLoader($container, $locator), new YamlFileLoader($container, $locator), new IniFileLoader($container, $locator), new PhpFileLoader($container, $locator), new ClosureLoader($container), )); return new DelegatingLoader($resolver); } /** * Removes comments from a PHP source string. * * We don't use the PHP php_strip_whitespace() function * as we want the content to be readable and well-formatted. * * @param string $source A PHP string * * @return string The PHP string with the comments removed */ public static function stripComments($source) { if (!function_exists('token_get_all')) { return $source; } $rawChunk = ''; $output = ''; $tokens = token_get_all($source); $ignoreSpace = false; for (reset($tokens); false !== $token = current($tokens); next($tokens)) { if (is_string($token)) { $rawChunk .= $token; } elseif (T_START_HEREDOC === $token[0]) { $output .= $rawChunk.$token[1]; do { $token = next($tokens); $output .= $token[1]; } while ($token[0] !== T_END_HEREDOC); $rawChunk = ''; } elseif (T_WHITESPACE === $token[0]) { if ($ignoreSpace) { $ignoreSpace = false; continue; } // replace multiple new lines with a single newline $rawChunk .= preg_replace(array('/\n{2,}/S'), "\n", $token[1]); } elseif (in_array($token[0], array(T_COMMENT, T_DOC_COMMENT))) { $ignoreSpace = true; } else { $rawChunk .= $token[1]; // The PHP-open tag already has a new-line if (T_OPEN_TAG === $token[0]) { $ignoreSpace = true; } } } $output .= $rawChunk; return $output; } public function serialize() { return serialize(array($this->environment, $this->debug)); } public function unserialize($data) { list($environment, $debug) = unserialize($data); $this->__construct($environment, $debug); } }