Laravel Route Cache

CacheResponse.php

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Symfony\Component\HttpFoundation\Response;
use Illuminate\Support\Facades\Cache;

class CacheResponse
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request                   $request
     * @param  \Closure                                   $next
     * @param  int|null                                   $cacheSeconds
     * @return \Symfony\Component\HttpFoundation\Response
     */
    public function handle(Request $request, Closure $next, $cacheDuration = 0): Response
    {
        // Bypass Cache for authenticated users and non GET requests
        if (auth()->check() || !$request->isMethod('GET')) {
            return $next($request);
        }

        $server_cache = false;
        if ($cacheDuration != 0) {
            $params        = explode('|', $cacheDuration);
            $cacheDuration = $params[0];
            $server_cache  = isset($params[1]) ? true : false;
        }

        if ($cacheDuration <= 0) {
            return $next($request);
        }

        // Generate unique cache key
        $url_sha1 = sha1($request->url());
        $cacheKey = "route_cache:{$url_sha1}";

        // Return cached response if available
        $cached = Cache::get($cacheKey);
        if ($cached) {
            $response = response($cached['content']);
            $response->setContent(preg_replace('/##CSRF##/', csrf_token(), $cached['content']));

            foreach ($cached['headers'] as $header => $values) {
                $response->headers->set($header, $values);
            }

            /*
            * If you want to cache the response on the server side
            * you can use the following code to set the cache control
            * header to the remaining time left for the cache to expire
            * and return the response.
            * Important: This will cache the response on the server side, so use it with caution.
            */

            if ($server_cache === true) {
                $timeLeft = $cached['time']->diffInSeconds(now());
                $response->headers->set('Cache-Control', "public, max-age={$timeLeft}");
                $response->headers->set('ETag', $url_sha1);
                $response->headers->set('Expires', now()->addSeconds($timeLeft)->toRfc7231String());
            }

            return $response;
        }

        // Process request and cache response
        $response = $next($request);

        if ($response->isSuccessful()) {
            $headers = collect($response->headers->all())
                ->except(['Set-Cookie', 'Cache-Control'])
                ->toArray();

            $content = $response->getContent();

            // Inject CSRF token to cached content
            $content = preg_replace('/data-csrf=".*?"/', 'data-csrf="##CSRF##"', $content);
            $content = preg_replace('/name="csrf-token" content=".*?"/', 'name="csrf-token" content="##CSRF##"', $content);

            Cache::put($cacheKey, [
                'content' => $content,
                'headers' => $headers,
                'time'    => now()
            ], now()->addSeconds($cacheDuration));
        }

        return $response;
    }
}