2012-12-19 07:54:53 +00:00
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<?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\HttpFoundation\Request;
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2013-01-20 09:04:47 +00:00
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use Symfony\Component\HttpFoundation\Response;
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use Symfony\Component\HttpFoundation\StreamedResponse;
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2012-12-19 07:54:53 +00:00
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use Symfony\Component\HttpKernel\Controller\ControllerReference;
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use Symfony\Component\HttpKernel\Event\GetResponseEvent;
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use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
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use Symfony\Component\HttpKernel\RenderingStrategy\RenderingStrategyInterface;
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use Symfony\Component\EventDispatcher\EventSubscriberInterface;
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/**
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2013-01-04 17:38:08 +00:00
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* Renders a URI using different strategies.
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2012-12-19 07:54:53 +00:00
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*
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2013-01-22 08:06:13 +00:00
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* This class handles sub-requests. The response content from the sub-request
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* is then embedded into a master request. The handling of the sub-request
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* is managed by rendering strategies.
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*
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2012-12-19 07:54:53 +00:00
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* @author Fabien Potencier <fabien@symfony.com>
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2013-01-22 08:06:13 +00:00
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*
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* @see RenderingStrategyInterface
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2012-12-19 07:54:53 +00:00
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*/
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class HttpContentRenderer implements EventSubscriberInterface
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{
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private $debug;
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private $strategies;
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private $requests;
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2013-01-04 17:38:08 +00:00
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/**
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* Constructor.
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*
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* @param RenderingStrategyInterface[] $strategies An array of RenderingStrategyInterface instances
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* @param Boolean $debug Whether the debug mode is enabled or not
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*/
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2012-12-19 07:54:53 +00:00
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public function __construct(array $strategies = array(), $debug = false)
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{
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$this->strategies = array();
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foreach ($strategies as $strategy) {
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$this->addStrategy($strategy);
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}
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$this->debug = $debug;
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$this->requests = array();
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}
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2013-01-04 17:38:08 +00:00
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/**
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* Adds a rendering strategy.
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*
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* @param RenderingStrategyInterface $strategy A RenderingStrategyInterface instance
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*/
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2012-12-19 07:54:53 +00:00
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public function addStrategy(RenderingStrategyInterface $strategy)
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{
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$this->strategies[$strategy->getName()] = $strategy;
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}
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/**
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* Stores the Request object.
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*
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* @param GetResponseEvent $event A GetResponseEvent instance
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*/
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public function onKernelRequest(GetResponseEvent $event)
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{
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array_unshift($this->requests, $event->getRequest());
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}
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/**
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* Removes the most recent Request object.
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*
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* @param FilterResponseEvent $event A FilterResponseEvent instance
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*/
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public function onKernelResponse(FilterResponseEvent $event)
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{
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array_shift($this->requests);
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}
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/**
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* Renders a URI and returns the Response content.
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*
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2013-01-06 08:31:07 +00:00
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* Available options:
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*
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2012-12-19 07:54:53 +00:00
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* * ignore_errors: true to return an empty string in case of an error
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*
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2013-01-06 08:31:07 +00:00
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* @param string|ControllerReference $uri A URI as a string or a ControllerReference instance
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* @param string $strategy The strategy to use for the rendering
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* @param array $options An array of options
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2012-12-19 07:54:53 +00:00
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*
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2013-01-04 17:38:08 +00:00
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* @return string|null The Response content or null when the Response is streamed
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2013-01-10 15:08:44 +00:00
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*
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* @throws \InvalidArgumentException when the strategy does not exist
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2013-01-20 09:04:47 +00:00
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* @throws \RuntimeException when the Response is not successful
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2012-12-19 07:54:53 +00:00
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*/
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2013-01-06 08:31:07 +00:00
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public function render($uri, $strategy = 'default', array $options = array())
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2012-12-19 07:54:53 +00:00
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{
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if (!isset($options['ignore_errors'])) {
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$options['ignore_errors'] = !$this->debug;
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}
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if (!isset($this->strategies[$strategy])) {
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throw new \InvalidArgumentException(sprintf('The "%s" rendering strategy does not exist.', $strategy));
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}
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2013-01-22 08:06:13 +00:00
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return $this->deliver($this->strategies[$strategy]->render($uri, $this->requests[0], $options));
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2013-01-20 09:04:47 +00:00
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}
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/**
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* Delivers the Response as a string.
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*
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* When the Response is a StreamedResponse, the content is streamed immediately
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* instead of being returned.
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*
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* @param Response $response A Response instance
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*
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* @return string|null The Response content or null when the Response is streamed
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*
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* @throws \RuntimeException when the Response is not successful
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*/
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protected function deliver(Response $response)
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{
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if (!$response->isSuccessful()) {
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2013-01-24 06:50:13 +00:00
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throw new \RuntimeException(sprintf('Error when rendering "%s" (Status code is %s).', $this->requests[0]->getUri(), $response->getStatusCode()));
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2013-01-20 09:04:47 +00:00
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}
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if (!$response instanceof StreamedResponse) {
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return $response->getContent();
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}
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$response->sendContent();
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2012-12-19 07:54:53 +00:00
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}
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public static function getSubscribedEvents()
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{
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return array(
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KernelEvents::REQUEST => 'onKernelRequest',
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KernelEvents::RESPONSE => 'onKernelResponse',
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);
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}
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2013-01-04 17:38:08 +00:00
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// to be removed in 2.3
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2013-01-06 10:00:55 +00:00
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public function fixOptions(array $options)
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2012-12-19 07:54:53 +00:00
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{
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// support for the standalone option is @deprecated in 2.2 and replaced with the strategy option
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if (isset($options['standalone'])) {
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trigger_error('The "standalone" option is deprecated in version 2.2 and replaced with the "strategy" option.', E_USER_DEPRECATED);
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// support for the true value is @deprecated in 2.2, will be removed in 2.3
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if (true === $options['standalone']) {
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trigger_error('The "true" value for the "standalone" option is deprecated in version 2.2 and replaced with the "esi" value.', E_USER_DEPRECATED);
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$options['standalone'] = 'esi';
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2013-01-11 08:12:57 +00:00
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} elseif (false === $options['standalone']) {
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trigger_error('The "false" value for the "standalone" option is deprecated in version 2.2 and replaced with the "default" value.', E_USER_DEPRECATED);
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$options['standalone'] = 'default';
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2012-12-19 07:54:53 +00:00
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} elseif ('js' === $options['standalone']) {
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trigger_error('The "js" value for the "standalone" option is deprecated in version 2.2 and replaced with the "hinclude" value.', E_USER_DEPRECATED);
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$options['standalone'] = 'hinclude';
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}
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$options['strategy'] = $options['standalone'];
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2013-01-06 10:00:55 +00:00
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unset($options['standalone']);
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2012-12-19 07:54:53 +00:00
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}
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return $options;
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}
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}
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