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<?php |
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namespace Devmatic\InstantClick\Middleware; |
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use Closure; |
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use Illuminate\Http\Request; |
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use Illuminate\Http\Response; |
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use Symfony\Component\DomCrawler\Crawler; |
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class FilterIfInstantClick |
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{ |
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/** |
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* The DomCrawler instance. |
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* |
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* @var \Symfony\Component\DomCrawler\Crawler |
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*/ |
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protected $crawler; |
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/** |
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* Handle an incoming request. |
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* |
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* @param \Illuminate\Http\Request $request |
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* @param \Closure $next |
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* |
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* @return mixed |
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*/ |
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public function handle(Request $request, Closure $next) |
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{ |
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$response = $next($request); |
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if (!$this->isInstantClickRequest($request) || $response->isRedirection()) { |
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return $response; |
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} |
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$this->filterResponse($response, $container = 'body') |
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->setResponseHeader($response); |
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return $response; |
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} |
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/** |
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* @param \Illuminate\Http\Response $response |
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* @param string $container |
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* |
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* @return $this |
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*/ |
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protected function filterResponse(Response $response, $container) |
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{ |
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$crawler = $this->getCrawler($response); |
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$response->setContent( |
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$this->makeTitle($crawler) . |
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$this->fetchContainer($crawler, $container) |
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); |
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return $this; |
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} |
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/** |
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* @param \Symfony\Component\DomCrawler\Crawler $crawler |
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* |
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* @return null|string |
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*/ |
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protected function makeTitle(Crawler $crawler) |
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{ |
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$pageTitle = $crawler->filter('head > title'); |
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if (!$pageTitle->count()) { |
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return; |
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} |
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return "<title>{$pageTitle->html()}</title>"; |
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} |
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/** |
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* @param \Symfony\Component\DomCrawler\Crawler $crawler |
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* @param string $container |
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* |
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* @return string |
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*/ |
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protected function fetchContainer(Crawler $crawler, $container) |
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{ |
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$content = $crawler->filter($container); |
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if (!$content->count()) { |
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abort(422); |
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} |
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return $content->html(); |
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} |
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/** |
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* Get the DomCrawler instance. |
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* |
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* @param \Illuminate\Http\Response $response |
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* |
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* @return \Symfony\Component\DomCrawler\Crawler |
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*/ |
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protected function getCrawler(Response $response) |
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{ |
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if ($this->crawler) { |
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return $this->crawler; |
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} |
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return $this->crawler = new Crawler($response->getContent()); |
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} |
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/** |
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* Determine if the request is the result of an InstantClick call. |
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* |
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* @return bool |
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*/ |
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public function isInstantClickRequest(Request $request) |
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{ |
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return $request->headers->get('X-INSTANTCLICK') == true; |
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} |
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/** |
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* @param \Illuminate\Http\Response $response |
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* |
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* @return $this |
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* @internal param \Illuminate\Http\Request $request |
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* |
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*/ |
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protected function setResponseHeader(Response $response) |
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{ |
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$response->header('X-INSTANTCLICK', "true"); |
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return $this; |
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} |
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} |
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devmatic /
laravel-instantclick
