README

Use this bundle to (pre)render a request or URL. This is useful if you render your page using javascript and want to show the HTML output of that page to Googlebot or other clients not very fond of javascript.

See Googles own help page on this topic: Implement dynamic rendering.

Installation

To install this bundle, simply run:

composer require setono/prerender-bundle

This will install the bundle and enable it if you're using Symfony Flex. If you're not using Flex, add the bundle manually to bundles.php instead.

Configuration

The bundle is already preconfigured for you if you want to use the open source version of prerender.io. Then you just need to run that service. However, you can configure it easily like so:

# config/packages/setono_prerender.yaml
setono_prerender:
    adapter:
        prerender: 'http://your-prerender-url.com'

If you want to create your own prerenderer service, just implement the PrerendererInterface and tag your service with setono_prerender.prerenderer. Then in the configuration of the bundle do this:

# config/packages/setono_prerender.yaml
setono_prerender:
    prerenderer: 'the-service-id-of-your-prerenderer-service'

Usage

Here is a very basic example of a product controller where we want to render the index action:

<?php

declare(strict_types=1);

namespace App\Controller;

use Setono\PrerenderBundle\Prerenderer\PrerendererInterface;
use Symfony\Component\HttpFoundation\Response;

final class ProductController
{
    public function index(PrerendererInterface $prerenderer): Response
    {
        if($this->isBot()) {
            // return the rendered HTML if the client is a bot
            return new Response($prerenderer->renderMainRequest());
        }

        // render the response the normal way if the client is NOT a bot
        return new Response('...');
    }

    /**
     * Method that returns true if the client is a bot
     */
    private function isBot(): bool
    {
        // ...
    }
}