788 lines
23 KiB
PHP
788 lines
23 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\HttpKernel;
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use Symfony\Component\DependencyInjection\ContainerInterface;
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use Symfony\Component\DependencyInjection\ContainerBuilder;
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use Symfony\Component\DependencyInjection\Dumper\PhpDumper;
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use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
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use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
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use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
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use Symfony\Component\DependencyInjection\Loader\IniFileLoader;
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use Symfony\Component\DependencyInjection\Loader\PhpFileLoader;
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use Symfony\Component\DependencyInjection\Loader\ClosureLoader;
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use Symfony\Component\HttpFoundation\Request;
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use Symfony\Component\HttpFoundation\Response;
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use Symfony\Component\HttpKernel\HttpKernelInterface;
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use Symfony\Component\HttpKernel\Bundle\BundleInterface;
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use Symfony\Component\HttpKernel\Config\FileLocator;
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use Symfony\Component\HttpKernel\DependencyInjection\MergeExtensionConfigurationPass;
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use Symfony\Component\HttpKernel\DependencyInjection\AddClassesToCachePass;
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use Symfony\Component\HttpKernel\Debug\ErrorHandler;
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use Symfony\Component\HttpKernel\Debug\ExceptionHandler;
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use Symfony\Component\Config\Loader\LoaderResolver;
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use Symfony\Component\Config\Loader\DelegatingLoader;
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use Symfony\Component\Config\ConfigCache;
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use Symfony\Component\ClassLoader\ClassCollectionLoader;
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use Symfony\Component\ClassLoader\DebugClassLoader;
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/**
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* The Kernel is the heart of the Symfony system.
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*
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* It manages an environment made of bundles.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*
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* @api
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*/
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abstract class Kernel implements KernelInterface, TerminableInterface
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{
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protected $bundles;
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protected $bundleMap;
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protected $container;
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protected $rootDir;
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protected $environment;
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protected $debug;
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protected $booted;
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protected $name;
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protected $startTime;
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protected $classes;
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protected $errorReportingLevel;
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const VERSION = '2.1.0-DEV';
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const VERSION_ID = '20100';
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const MAJOR_VERSION = '2';
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const MINOR_VERSION = '1';
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const RELEASE_VERSION = '0';
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const EXTRA_VERSION = 'DEV';
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/**
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* Constructor.
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*
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* @param string $environment The environment
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* @param Boolean $debug Whether to enable debugging or not
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*
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* @api
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*/
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public function __construct($environment, $debug)
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{
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$this->environment = $environment;
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$this->debug = (Boolean) $debug;
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$this->booted = false;
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$this->rootDir = $this->getRootDir();
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$this->name = $this->getName();
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$this->classes = array();
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if ($this->debug) {
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$this->startTime = microtime(true);
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}
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$this->init();
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}
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public function init()
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{
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if ($this->debug) {
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ini_set('display_errors', 1);
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error_reporting(-1);
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DebugClassLoader::enable();
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ErrorHandler::register($this->errorReportingLevel);
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if ('cli' !== php_sapi_name()) {
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ExceptionHandler::register();
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}
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} else {
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ini_set('display_errors', 0);
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}
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}
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public function __clone()
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{
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if ($this->debug) {
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$this->startTime = microtime(true);
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}
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$this->booted = false;
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$this->container = null;
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}
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/**
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* Boots the current kernel.
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*
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* @api
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*/
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public function boot()
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{
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if (true === $this->booted) {
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return;
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}
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// init bundles
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$this->initializeBundles();
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// init container
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$this->initializeContainer();
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foreach ($this->getBundles() as $bundle) {
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$bundle->setContainer($this->container);
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$bundle->boot();
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}
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$this->booted = true;
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}
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/**
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* {@inheritdoc}
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*
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* @api
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*/
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public function terminate(Request $request, Response $response)
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{
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if (false === $this->booted) {
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return;
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}
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if ($this->getHttpKernel() instanceof TerminableInterface) {
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$this->getHttpKernel()->terminate($request, $response);
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}
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}
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/**
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* Shutdowns the kernel.
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*
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* This method is mainly useful when doing functional testing.
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*
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* @api
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*/
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public function shutdown()
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{
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if (false === $this->booted) {
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return;
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}
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$this->booted = false;
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foreach ($this->getBundles() as $bundle) {
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$bundle->shutdown();
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$bundle->setContainer(null);
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}
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$this->container = null;
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}
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/**
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* {@inheritdoc}
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*
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* @api
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*/
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public function handle(Request $request, $type = HttpKernelInterface::MASTER_REQUEST, $catch = true)
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{
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if (false === $this->booted) {
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$this->boot();
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}
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return $this->getHttpKernel()->handle($request, $type, $catch);
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}
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/**
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* Gets a http kernel from the container
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*
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* @return HttpKernel
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*/
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protected function getHttpKernel()
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{
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return $this->container->get('http_kernel');
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}
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/**
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* Gets the registered bundle instances.
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*
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* @return array An array of registered bundle instances
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*
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* @api
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*/
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public function getBundles()
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{
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return $this->bundles;
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}
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/**
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* Checks if a given class name belongs to an active bundle.
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*
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* @param string $class A class name
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*
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* @return Boolean true if the class belongs to an active bundle, false otherwise
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*
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* @api
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*/
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public function isClassInActiveBundle($class)
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{
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foreach ($this->getBundles() as $bundle) {
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if (0 === strpos($class, $bundle->getNamespace())) {
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return true;
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}
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}
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return false;
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}
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/**
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* Returns a bundle and optionally its descendants by its name.
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*
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* @param string $name Bundle name
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* @param Boolean $first Whether to return the first bundle only or together with its descendants
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*
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* @return BundleInterface|Array A BundleInterface instance or an array of BundleInterface instances if $first is false
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*
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* @throws \InvalidArgumentException when the bundle is not enabled
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*
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* @api
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*/
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public function getBundle($name, $first = true)
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{
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if (!isset($this->bundleMap[$name])) {
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throw new \InvalidArgumentException(sprintf('Bundle "%s" does not exist or it is not enabled. Maybe you forgot to add it in the registerBundles() function of your %s.php file?', $name, get_class($this)));
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}
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if (true === $first) {
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return $this->bundleMap[$name][0];
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}
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return $this->bundleMap[$name];
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}
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/**
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* Returns the file path for a given resource.
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*
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* A Resource can be a file or a directory.
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*
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* The resource name must follow the following pattern:
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*
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* @<BundleName>/path/to/a/file.something
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*
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* where BundleName is the name of the bundle
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* and the remaining part is the relative path in the bundle.
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*
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* If $dir is passed, and the first segment of the path is "Resources",
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* this method will look for a file named:
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*
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* $dir/<BundleName>/path/without/Resources
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*
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* before looking in the bundle resource folder.
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*
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* @param string $name A resource name to locate
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* @param string $dir A directory where to look for the resource first
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* @param Boolean $first Whether to return the first path or paths for all matching bundles
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*
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* @return string|array The absolute path of the resource or an array if $first is false
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*
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* @throws \InvalidArgumentException if the file cannot be found or the name is not valid
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* @throws \RuntimeException if the name contains invalid/unsafe
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* @throws \RuntimeException if a custom resource is hidden by a resource in a derived bundle
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*
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* @api
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*/
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public function locateResource($name, $dir = null, $first = true)
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{
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if ('@' !== $name[0]) {
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throw new \InvalidArgumentException(sprintf('A resource name must start with @ ("%s" given).', $name));
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}
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if (false !== strpos($name, '..')) {
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throw new \RuntimeException(sprintf('File name "%s" contains invalid characters (..).', $name));
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}
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$bundleName = substr($name, 1);
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$path = '';
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if (false !== strpos($bundleName, '/')) {
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list($bundleName, $path) = explode('/', $bundleName, 2);
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}
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$isResource = 0 === strpos($path, 'Resources') && null !== $dir;
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$overridePath = substr($path, 9);
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$resourceBundle = null;
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$bundles = $this->getBundle($bundleName, false);
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$files = array();
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foreach ($bundles as $bundle) {
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if ($isResource && file_exists($file = $dir.'/'.$bundle->getName().$overridePath)) {
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if (null !== $resourceBundle) {
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throw new \RuntimeException(sprintf('"%s" resource is hidden by a resource from the "%s" derived bundle. Create a "%s" file to override the bundle resource.',
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$file,
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$resourceBundle,
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$dir.'/'.$bundles[0]->getName().$overridePath
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));
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}
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if ($first) {
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return $file;
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}
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$files[] = $file;
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}
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if (file_exists($file = $bundle->getPath().'/'.$path)) {
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if ($first && !$isResource) {
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return $file;
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}
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$files[] = $file;
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$resourceBundle = $bundle->getName();
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}
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}
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if (count($files) > 0) {
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return $first && $isResource ? $files[0] : $files;
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}
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throw new \InvalidArgumentException(sprintf('Unable to find file "%s".', $name));
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}
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/**
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* Gets the name of the kernel
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*
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* @return string The kernel name
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*
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* @api
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*/
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public function getName()
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{
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if (null === $this->name) {
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$this->name = preg_replace('/[^a-zA-Z0-9_]+/', '', basename($this->rootDir));
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}
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return $this->name;
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}
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/**
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* Gets the environment.
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*
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* @return string The current environment
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*
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* @api
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*/
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public function getEnvironment()
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{
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return $this->environment;
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}
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/**
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* Checks if debug mode is enabled.
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*
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* @return Boolean true if debug mode is enabled, false otherwise
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*
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* @api
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*/
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public function isDebug()
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{
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return $this->debug;
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}
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/**
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* Gets the application root dir.
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*
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* @return string The application root dir
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*
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* @api
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*/
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public function getRootDir()
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{
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if (null === $this->rootDir) {
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$r = new \ReflectionObject($this);
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$this->rootDir = str_replace('\\', '/', dirname($r->getFileName()));
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}
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return $this->rootDir;
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}
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/**
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* Gets the current container.
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*
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* @return ContainerInterface A ContainerInterface instance
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*
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* @api
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*/
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public function getContainer()
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{
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return $this->container;
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}
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/**
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* Loads the PHP class cache.
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*
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* @param string $name The cache name prefix
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* @param string $extension File extension of the resulting file
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*/
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public function loadClassCache($name = 'classes', $extension = '.php')
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{
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if (!$this->booted && is_file($this->getCacheDir().'/classes.map')) {
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ClassCollectionLoader::load(include($this->getCacheDir().'/classes.map'), $this->getCacheDir(), $name, $this->debug, false, $extension);
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}
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}
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/**
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* Used internally.
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*/
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public function setClassCache(array $classes)
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{
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file_put_contents($this->getCacheDir().'/classes.map', sprintf('<?php return %s;', var_export($classes, true)));
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}
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/**
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* Gets the request start time (not available if debug is disabled).
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*
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* @return integer The request start timestamp
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*
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* @api
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*/
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public function getStartTime()
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{
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return $this->debug ? $this->startTime : -INF;
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}
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/**
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* Gets the cache directory.
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*
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* @return string The cache directory
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*
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* @api
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*/
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public function getCacheDir()
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{
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return $this->rootDir.'/cache/'.$this->environment;
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}
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/**
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* Gets the log directory.
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*
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* @return string The log directory
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*
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* @api
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*/
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public function getLogDir()
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{
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return $this->rootDir.'/logs';
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}
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/**
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* Gets the charset of the application.
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*
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* @return string The charset
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*
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* @api
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*/
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public function getCharset()
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{
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return 'UTF-8';
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}
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/**
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* Initializes the data structures related to the bundle management.
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*
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* - the bundles property maps a bundle name to the bundle instance,
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* - the bundleMap property maps a bundle name to the bundle inheritance hierarchy (most derived bundle first).
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*
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* @throws \LogicException if two bundles share a common name
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* @throws \LogicException if a bundle tries to extend a non-registered bundle
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* @throws \LogicException if a bundle tries to extend itself
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* @throws \LogicException if two bundles extend the same ancestor
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*/
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protected function initializeBundles()
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{
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// init bundles
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$this->bundles = array();
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$topMostBundles = array();
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$directChildren = array();
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foreach ($this->registerBundles() as $bundle) {
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$name = $bundle->getName();
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if (isset($this->bundles[$name])) {
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throw new \LogicException(sprintf('Trying to register two bundles with the same name "%s"', $name));
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}
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$this->bundles[$name] = $bundle;
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if ($parentName = $bundle->getParent()) {
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if (isset($directChildren[$parentName])) {
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throw new \LogicException(sprintf('Bundle "%s" is directly extended by two bundles "%s" and "%s".', $parentName, $name, $directChildren[$parentName]));
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}
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if ($parentName == $name) {
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throw new \LogicException(sprintf('Bundle "%s" can not extend itself.', $name));
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}
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$directChildren[$parentName] = $name;
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} else {
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$topMostBundles[$name] = $bundle;
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}
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}
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// look for orphans
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if (count($diff = array_values(array_diff(array_keys($directChildren), array_keys($this->bundles))))) {
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throw new \LogicException(sprintf('Bundle "%s" extends bundle "%s", which is not registered.', $directChildren[$diff[0]], $diff[0]));
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}
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// inheritance
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$this->bundleMap = array();
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foreach ($topMostBundles as $name => $bundle) {
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$bundleMap = array($bundle);
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$hierarchy = array($name);
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while (isset($directChildren[$name])) {
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$name = $directChildren[$name];
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array_unshift($bundleMap, $this->bundles[$name]);
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$hierarchy[] = $name;
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}
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foreach ($hierarchy as $bundle) {
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$this->bundleMap[$bundle] = $bundleMap;
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array_pop($bundleMap);
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}
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}
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}
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/**
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* Gets the container class.
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*
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* @return string The container class
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*/
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protected function getContainerClass()
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{
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return $this->name.ucfirst($this->environment).($this->debug ? 'Debug' : '').'ProjectContainer';
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}
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/**
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* Gets the container's base class.
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*
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* All names except Container must be fully qualified.
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*
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* @return string
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*/
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protected function getContainerBaseClass()
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{
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return 'Container';
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}
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|
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/**
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* Initializes the service container.
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*
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* The cached version of the service container is used when fresh, otherwise the
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* container is built.
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*/
|
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protected function initializeContainer()
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{
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$class = $this->getContainerClass();
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$cache = new ConfigCache($this->getCacheDir().'/'.$class.'.php', $this->debug);
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$fresh = true;
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if (!$cache->isFresh()) {
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$container = $this->buildContainer();
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$this->dumpContainer($cache, $container, $class, $this->getContainerBaseClass());
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$fresh = false;
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}
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require_once $cache;
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$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
|
|
*/
|
|
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();
|
|
$extensions = array();
|
|
foreach ($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);
|
|
}
|
|
|
|
$container->addObjectResource($this);
|
|
|
|
// ensure these extensions are implicitly loaded
|
|
$container->getCompilerPassConfig()->setMergePass(new MergeExtensionConfigurationPass($extensions));
|
|
|
|
if (null !== $cont = $this->registerContainerConfiguration($this->getContainerLoader($container))) {
|
|
$container->merge($cont);
|
|
}
|
|
|
|
$container->addCompilerPass(new AddClassesToCachePass($this));
|
|
$container->compile();
|
|
|
|
return $container;
|
|
}
|
|
|
|
/**
|
|
* Gets a new ContainerBuilder instance used to build the service container.
|
|
*
|
|
* @return ContainerBuilder
|
|
*/
|
|
protected function getContainerBuilder()
|
|
{
|
|
return new ContainerBuilder(new ParameterBag($this->getKernelParameters()));
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
$content = $dumper->dump(array('class' => $class, 'base_class' => $baseClass));
|
|
if (!$this->debug) {
|
|
$content = self::stripComments($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;
|
|
}
|
|
|
|
$output = '';
|
|
foreach (token_get_all($source) as $token) {
|
|
if (is_string($token)) {
|
|
$output .= $token;
|
|
} elseif (!in_array($token[0], array(T_COMMENT, T_DOC_COMMENT))) {
|
|
$output .= $token[1];
|
|
}
|
|
}
|
|
|
|
// replace multiple new lines with a single newline
|
|
$output = preg_replace(array('/\s+$/Sm', '/\n+/S'), "\n", $output);
|
|
|
|
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);
|
|
}
|
|
}
|