151 lines
5 KiB
PHP
151 lines
5 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\Fragment;
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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\HttpFoundation\StreamedResponse;
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use Symfony\Component\HttpFoundation\RequestStack;
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use Symfony\Component\HttpKernel\Controller\ControllerReference;
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/**
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* Renders a URI that represents a resource fragment.
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*
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* This class handles the rendering of resource fragments that are included into
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* a main resource. The handling of the rendering is managed by specialized renderers.
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*
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* This listener works in 2 modes:
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*
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* * 2.3 compatibility mode where you must call setRequest whenever the Request changes.
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* * 2.4+ mode where you must pass a RequestStack instance in the constructor.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*
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* @see FragmentRendererInterface
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*/
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class FragmentHandler
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{
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private $debug;
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private $renderers = array();
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private $request;
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private $requestStack;
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/**
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* Constructor.
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*
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* RequestStack will become required in 3.0.
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*
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* @param FragmentRendererInterface[] $renderers An array of FragmentRendererInterface instances
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* @param bool $debug Whether the debug mode is enabled or not
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* @param RequestStack|null $requestStack The Request stack that controls the lifecycle of requests
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*/
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public function __construct(array $renderers = array(), $debug = false, RequestStack $requestStack = null)
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{
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$this->requestStack = $requestStack;
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foreach ($renderers as $renderer) {
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$this->addRenderer($renderer);
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}
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$this->debug = $debug;
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}
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/**
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* Adds a renderer.
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*
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* @param FragmentRendererInterface $renderer A FragmentRendererInterface instance
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*/
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public function addRenderer(FragmentRendererInterface $renderer)
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{
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$this->renderers[$renderer->getName()] = $renderer;
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}
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/**
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* Sets the current Request.
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*
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* This method was used to synchronize the Request, but as the HttpKernel
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* is doing that automatically now, you should never call it directly.
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* It is kept public for BC with the 2.3 version.
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*
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* @param Request|null $request A Request instance
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*
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* @deprecated since version 2.4, to be removed in 3.0.
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*/
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public function setRequest(Request $request = null)
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{
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@trigger_error('The '.__METHOD__.' method is deprecated since version 2.4 and will be removed in 3.0.', E_USER_DEPRECATED);
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$this->request = $request;
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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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* Available options:
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*
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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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* @param string|ControllerReference $uri A URI as a string or a ControllerReference instance
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* @param string $renderer The renderer name
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* @param array $options An array of options
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*
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* @return string|null The Response content or null when the Response is streamed
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*
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* @throws \InvalidArgumentException when the renderer does not exist
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* @throws \LogicException when no master request is being handled
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*/
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public function render($uri, $renderer = 'inline', array $options = array())
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{
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if (!isset($options['ignore_errors'])) {
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$options['ignore_errors'] = !$this->debug;
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}
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if (!isset($this->renderers[$renderer])) {
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throw new \InvalidArgumentException(sprintf('The "%s" renderer does not exist.', $renderer));
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}
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if (!$request = $this->getRequest()) {
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throw new \LogicException('Rendering a fragment can only be done when handling a Request.');
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}
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return $this->deliver($this->renderers[$renderer]->render($uri, $request, $options));
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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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throw new \RuntimeException(sprintf('Error when rendering "%s" (Status code is %s).', $this->getRequest()->getUri(), $response->getStatusCode()));
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}
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if (!$response instanceof StreamedResponse) {
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return $response->getContent();
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}
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$response->sendContent();
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}
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private function getRequest()
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{
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return $this->requestStack ? $this->requestStack->getCurrentRequest() : $this->request;
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}
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}
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