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<?php |
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namespace Krenor\Http2Pusher\Middleware; |
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use Closure; |
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use Illuminate\Http\Request; |
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use Krenor\Http2Pusher\Builder; |
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use Krenor\Http2Pusher\Response; |
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use Symfony\Component\DomCrawler\Crawler; |
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class ServerPush |
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{ |
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/** |
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* @var Builder |
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*/ |
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protected $builder; |
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/** |
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* ServerPush constructor. |
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* |
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* @param Builder $builder |
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*/ |
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public function __construct(Builder $builder) |
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{ |
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$this->builder = $builder; |
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} |
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/** |
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* Handle an incoming request. |
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* |
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* @param Request $request |
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* @param Closure $next |
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* |
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* @return Response|\Illuminate\Http\RedirectResponse |
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*/ |
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public function handle(Request $request, Closure $next) |
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{ |
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/** @var Response $response */ |
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$response = $next($request); |
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if ($response->isRedirection() || $request->isJson() || $request->ajax()) { |
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return $response; |
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} |
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return $response->pushes( |
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$this->builder, |
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$this->retrieveLinkableElements($response) |
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); |
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} |
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/** |
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* Crawl the DOM for possible content to push. |
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* |
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* @param Response $response |
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* |
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* @return array |
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*/ |
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private function retrieveLinkableElements(Response $response): array |
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{ |
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$crawler = new Crawler($response->content()); |
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$content = $crawler->filter('link, script[src], img[src]') |
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->extract(['src', 'href']); |
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// TODO: Ordering might be necessary for manifest files due to https://laravel.com/docs/5.5/mix#vendor-extraction |
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return collect($content)->flatten(1) |
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->filter() |
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->toArray(); |
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} |
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} |
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krenor /
http2-pusher
