(Feature) Http2ServerPush

- Info regarding ServerPush http://blog.xebia.com/http2-server-push/ - I currently have it disabled in the kernel - This should only be used if you first raise your ``` fastcgi_buffers fastcgi_buffer_size ``` - From my testing this is well worth it and does speed up UNIT3D
2026-04-23 03:34:22 -05:00 · 2018-01-10 12:20:35 -05:00
parent 0f25015716
commit 05601df28b
4 changed files with 374 additions and 172 deletions
@@ -0,0 +1,145 @@
+<?php
+/**
+ * NOTICE OF LICENSE
+ *
+ * UNIT3D is open-sourced software licensed under the GNU General Public License v3.0
+ * The details is bundled with this project in the file LICENSE.txt.
+ *
+ * @project    UNIT3D
+ * @license    https://choosealicense.com/licenses/gpl-3.0/  GNU General Public License v3.0
+ * @author     HDVinnie
+ */
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Illuminate\Http\Response;
+use Symfony\Component\DomCrawler\Crawler;
+
+class Http2ServerPush
+{
+    /**
+     * The DomCrawler instance.
+     *
+     * @var \Symfony\Component\DomCrawler\Crawler
+     */
+    protected $crawler;
+
+    /**
+     * Handle an incoming request.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @param \Closure $next
+     *
+     * @return mixed
+     */
+    public function handle(Request $request, Closure $next, $limit = null)
+    {
+        $response = $next($request);
+
+        if ($response->isRedirection() || !$response instanceof Response || $request->isJson()) {
+            return $response;
+        }
+
+        $this->generateAndAttachLinkHeaders($response, $limit);
+
+        return $response;
+    }
+
+    /**
+     * @param \Illuminate\Http\Response $response
+     *
+     * @return $this
+     */
+    protected function generateAndAttachLinkHeaders(Response $response, $limit = null)
+    {
+        $headers = $this->fetchLinkableNodes($response)
+            ->flatten(1)
+            ->map(function ($url) {
+                return $this->buildLinkHeaderString($url);
+            })
+            ->filter()
+            ->take($limit)
+            ->implode(',');
+
+        if (!empty(trim($headers))) {
+            $this->addLinkHeader($response, $headers);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Get the DomCrawler instance.
+     *
+     * @param \Illuminate\Http\Response $response
+     *
+     * @return \Symfony\Component\DomCrawler\Crawler
+     */
+    protected function getCrawler(Response $response)
+    {
+        if ($this->crawler) {
+            return $this->crawler;
+        }
+
+        return $this->crawler = new Crawler($response->getContent());
+    }
+
+    /**
+     * Get all nodes we are interested in pushing.
+     *
+     * @param \Illuminate\Http\Response $response
+     *
+     * @return \Illuminate\Support\Collection
+     */
+    protected function fetchLinkableNodes($response)
+    {
+        $crawler = $this->getCrawler($response);
+
+        return collect($crawler->filter('link, script[src], img[src]')->extract(['src', 'href']));
+    }
+
+    /**
+     * Build out header string based on asset extension.
+     *
+     * @param string $url
+     *
+     * @return string
+     */
+    private function buildLinkHeaderString($url)
+    {
+        $linkTypeMap = [
+            '.CSS'  => 'style',
+            '.JS'   => 'script',
+            '.BMP'  => 'image',
+            '.GIF'  => 'image',
+            '.JPG'  => 'image',
+            '.JPEG' => 'image',
+            '.PNG'  => 'image',
+            '.TIFF' => 'image',
+        ];
+
+        $type = collect($linkTypeMap)->first(function ($type, $extension) use ($url) {
+            return str_contains(strtoupper($url), $extension);
+        });
+
+        return is_null($type) ? null : "<{$url}>; rel=preload; as={$type}";
+    }
+
+    /**
+     * Add Link Header
+     *
+     * @param \Illuminate\Http\Response $response
+     *
+     * @param $link
+     */
+    private function addLinkHeader(Response $response, $link)
+    {
+        if ($response->headers->get('Link')) {
+            $link = $response->headers->get('Link') . ',' . $link;
+        }
+
+        $response->header('Link', $link);
+    }
+}