84 lines
2.5 KiB
PHP
84 lines
2.5 KiB
PHP
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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\HttpCache;
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use Symfony\Component\HttpFoundation\Request;
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use Symfony\Component\HttpFoundation\Response;
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/**
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* Ssi implements the SSI capabilities to Request and Response instances.
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*
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* @author Sebastian Krebs <krebs.seb@gmail.com>
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*/
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class Ssi extends AbstractSurrogate
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{
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public function getName(): string
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{
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return 'ssi';
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}
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public function addSurrogateControl(Response $response): void
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{
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if (str_contains($response->getContent(), '<!--#include')) {
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$response->headers->set('Surrogate-Control', 'content="SSI/1.0"');
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}
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}
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public function renderIncludeTag(string $uri, ?string $alt = null, bool $ignoreErrors = true, string $comment = ''): string
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{
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return \sprintf('<!--#include virtual="%s" -->', $uri);
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}
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public function process(Request $request, Response $response): Response
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{
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$type = $response->headers->get('Content-Type');
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if (!$type) {
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$type = 'text/html';
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}
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$parts = explode(';', $type);
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if (!\in_array($parts[0], $this->contentTypes, true)) {
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return $response;
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}
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// we don't use a proper XML parser here as we can have SSI tags in a plain text response
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$content = $response->getContent();
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$boundary = self::generateBodyEvalBoundary();
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$chunks = preg_split('#<!--\#include\s+(.*?)\s*-->#', $content, -1, \PREG_SPLIT_DELIM_CAPTURE);
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$i = 1;
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while (isset($chunks[$i])) {
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$options = [];
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preg_match_all('/(virtual)="([^"]*?)"/', $chunks[$i], $matches, \PREG_SET_ORDER);
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foreach ($matches as $set) {
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$options[$set[1]] = $set[2];
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}
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if (!isset($options['virtual'])) {
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throw new \RuntimeException('Unable to process an SSI tag without a "virtual" attribute.');
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}
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$chunks[$i] = $boundary.$options['virtual']."\n\n\n";
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$i += 2;
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}
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$content = $boundary.implode('', $chunks).$boundary;
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$response->setContent($content);
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$response->headers->set('X-Body-Eval', 'SSI');
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// remove SSI/1.0 from the Surrogate-Control header
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$this->removeFromControl($response);
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return $response;
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}
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}
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