91 lines
2.4 KiB
PHP
91 lines
2.4 KiB
PHP
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<?php
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namespace App\Http\Middleware;
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use Closure;
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use Illuminate\Http\Request;
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use Illuminate\Support\Str;
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class PrerenderIfCrawler
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{
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protected $crawlerUserAgents = [
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'Yahoo! Slurp',
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'bingbot',
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'yandex',
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'baiduspider',
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'facebookexternalhit',
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'twitterbot',
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'rogerbot',
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'linkedinbot',
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'embedly',
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'quora link preview',
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'showyoubot',
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'outbrain',
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'pinterest/0.',
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'slackbot',
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'vkShare',
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'W3C_Validator',
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'redditbot',
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'Applebot',
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'WhatsApp',
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'flipboard',
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'tumblr',
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'bitlybot',
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'SkypeUriPreview',
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'nuzzel',
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'Discordbot',
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'Qwantify',
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'pinterestbot',
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'Bitrix link preview',
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'XING-contenttabreceiver',
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'developers.google.com/+/web/snippet',
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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 \Illuminate\Http\Request $request
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* @param \Closure(\Illuminate\Http\Request): (\Illuminate\Http\Response|\Illuminate\Http\RedirectResponse) $next
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* @return \Illuminate\Http\Response|\Illuminate\Http\RedirectResponse
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*/
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public function handle(Request $request, Closure $next, string $routeName = null)
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{
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if ($this->shouldPrerender($request)) {
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define('SHOULD_PRERENDER', true);
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// Always fallback to client routes if not prerendering
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// otherwise prerender routes will override client side routing
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} else if ($routeName !== 'homepage') {
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// return app(HomeController::class)->show();
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}
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return $next($request);
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}
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protected function shouldPrerender(Request $request): bool
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{
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$userAgent = strtolower($request->server->get('HTTP_USER_AGENT'));
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$bufferAgent = $request->server->get('X-BUFFERBOT');
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$shouldPrerender = false;
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if ( ! $userAgent) return false;
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if ( ! $request->isMethod('GET')) return false;
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// prerender if _escaped_fragment_ is in the query string
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if ($request->query->has('_escaped_fragment_')) $shouldPrerender = true;
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// prerender if a crawler is detected
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foreach ($this->crawlerUserAgents as $crawlerUserAgent) {
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if (Str::contains($userAgent, strtolower($crawlerUserAgent))) {
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$shouldPrerender = true;
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}
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}
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if ($bufferAgent) $shouldPrerender = true;
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return $shouldPrerender;
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}
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}
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