121 lines
4.4 KiB
PHP
121 lines
4.4 KiB
PHP
<?php
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declare(strict_types=1);
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/*
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* This file is part of the TYPO3 CMS project.
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*
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* It is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, either version 2
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* of the License, or any later version.
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*
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* For the full copyright and license information, please read the
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* LICENSE.txt file that was distributed with this source code.
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*
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* The TYPO3 project - inspiring people to share!
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*/
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namespace TYPO3\CMS\Core\Resource;
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use Psr\Http\Message\ServerRequestInterface;
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use TYPO3\CMS\Core\SystemResource\Publishing\SystemResourcePublisherInterface;
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use TYPO3\CMS\Core\SystemResource\SystemResourceFactory;
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/**
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* This fixes import paths in CSS files if their location changes,
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* e.g. when inlining or compressing css
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*
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* @internal This class is not part of the TYPO3 API.
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*/
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class RelativeCssPathFixer
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{
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public function __construct(
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private readonly SystemResourceFactory $resourceFactory,
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private readonly SystemResourcePublisherInterface $resourcePublisher,
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) {}
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/**
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* Fixes the relative paths inside of url() references in CSS files
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*
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* @param string $contents Data to process
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* @param string $newDir directory referenced from current location
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* @return string Processed data
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*/
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public function fixRelativeUrlPaths(string $contents, string $newDir, ServerRequestInterface $request): string
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{
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// Replace "url()" paths
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if (stripos($contents, 'url') !== false) {
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$regex = '/url(\\(\\s*["\']?(?!\\/)([^"\']+)["\']?\\s*\\))/iU';
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$contents = $this->findAndReplaceUrlPathsByRegex($contents, $regex, $newDir, '(\'|\')', $request);
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}
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// Replace "@import" paths
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if (stripos($contents, '@import') !== false) {
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$regex = '/@import\\s*(["\']?(?!\\/)([^"\']+)["\']?)/i';
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$contents = $this->findAndReplaceUrlPathsByRegex($contents, $regex, $newDir, '"|"', $request);
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}
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return $contents;
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}
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/**
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* Finds and replaces all URLs by using a given regex
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*
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* @param string $contents Data to process
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* @param string $regex Regex used to find URLs in content
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* @param string $newDir Path to prepend to the original file
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* @param string $wrap Wrap around replaced values
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* @return string Processed data
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*/
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protected function findAndReplaceUrlPathsByRegex(string $contents, string $regex, string $newDir, string $wrap, ServerRequestInterface $request): string
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{
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$matches = [];
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$replacements = [];
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$wrapParts = explode('|', $wrap);
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preg_match_all($regex, $contents, $matches);
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foreach ($matches[2] as $matchCount => $match) {
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// remove '," or white-spaces around
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$match = trim($match, '\'" ');
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// we must not rewrite paths starting with "#", containing ":" or "url(", e.g. data URIs (see RFC 2397)
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if (!str_starts_with($match, '#') && !str_contains($match, ':') && !preg_match('/url\\s*\\(/i', $match)) {
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$newPath = $this->resolveBackPath($newDir . $match);
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$newUri = $this->resourcePublisher->generateUri($this->resourceFactory->createPublicResource($newPath), $request);
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$replacements[$matches[1][$matchCount]] = $wrapParts[0] . $newUri . $wrapParts[1];
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}
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}
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// replace URL paths in content
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if (!empty($replacements)) {
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$contents = str_replace(array_keys($replacements), array_values($replacements), $contents);
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}
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return $contents;
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}
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/**
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* Resolves "../" sections in the input path string.
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* For example "fileadmin/directory/../other_directory/" will be resolved to "fileadmin/other_directory/"
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*
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* @param string $pathStr File path in which "/../" is resolved
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*/
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protected function resolveBackPath(string $pathStr): string
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{
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if (!str_contains($pathStr, '..')) {
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return $pathStr;
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}
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$parts = explode('/', $pathStr);
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$output = [];
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$c = 0;
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foreach ($parts as $part) {
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if ($part === '..') {
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if ($c) {
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array_pop($output);
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--$c;
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} else {
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$output[] = $part;
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}
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} else {
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++$c;
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$output[] = $part;
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}
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}
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return implode('/', $output);
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}
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}
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