65 lines
1.6 KiB
PHP
65 lines
1.6 KiB
PHP
<?php
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namespace BookStack\Theming;
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use BookStack\Util\CspService;
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use BookStack\Util\HtmlContentFilter;
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use BookStack\Util\HtmlNonceApplicator;
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use Illuminate\Contracts\Cache\Repository as Cache;
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class CustomHtmlHeadContentProvider
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{
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/**
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* @var CspService
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*/
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protected $cspService;
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/**
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* @var Cache
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*/
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protected $cache;
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public function __construct(CspService $cspService, Cache $cache)
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{
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$this->cspService = $cspService;
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$this->cache = $cache;
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}
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/**
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* Fetch our custom HTML head content prepared for use on web pages.
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* Content has a nonce applied for CSP.
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*/
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public function forWeb(): string
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{
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$content = $this->getSourceContent();
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$hash = md5($content);
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$html = $this->cache->remember('custom-head-web:' . $hash, 86400, function () use ($content) {
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return HtmlNonceApplicator::prepare($content);
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});
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return HtmlNonceApplicator::apply($html, $this->cspService->getNonce());
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}
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/**
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* Fetch our custom HTML head content prepared for use in export formats.
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* Scripts are stripped to avoid potential issues.
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*/
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public function forExport(): string
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{
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$content = $this->getSourceContent();
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$hash = md5($content);
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return $this->cache->remember('custom-head-export:' . $hash, 86400, function () use ($content) {
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return HtmlContentFilter::removeScripts($content);
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});
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}
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/**
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* Get the original custom head content to use.
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*/
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protected function getSourceContent(): string
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{
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return setting('app-custom-head', '');
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}
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}
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