Snappy is a PHP wrapper for the wkhtmltopdf conversion utility. It allows you to generate either pdf or image files from your html documents, using the webkit engine.
The KnpSnappyBundle provides a simple integration for your Symfony project.
If you use JavaScript to render your pages, you may encounter some issues because of wkhtmltopdf not being fully compatible with ES6 apis. The only way to solve this issue is to provide polyfills that fix the gaps between modern ES6 apis and the wkhtmltopdf rendering engine.
With composer, require:
composer require knplabs/knp-snappy-bundleIf you are not using Flex, enable it in your kernel :
// config/bundles.php
<?php
return [
//...
Knp\Bundle\SnappyBundle\KnpSnappyBundle::class => ['all' => true],
//...
];If you need to change the binaries, change the instance options or even disable one or both services, you can do it through the configuration.
# config/packages/knp_snappy.yaml
knp_snappy:
pdf:
enabled: true
binary: /usr/local/bin/wkhtmltopdf #"\"C:\\Program Files\\wkhtmltopdf\\bin\\wkhtmltopdf.exe\"" for Windows users
options: []
image:
enabled: true
binary: /usr/local/bin/wkhtmltoimage #"\"C:\\Program Files\\wkhtmltopdf\\bin\\wkhtmltoimage.exe\"" for Windows users
options: []If you want to change temporary folder which is sys_get_temp_dir() by default, you can use
# config/packages/knp_snappy.yaml
knp_snappy:
temporary_folder: "%kernel.cache_dir%/snappy"You can also configure the timeout used by the generators with process_timeout:
# config/packages/knp_snappy.yaml
knp_snappy:
process_timeout: 20 # In secondsThe bundle registers two services:
- the
knp_snappy.imageservice allows you to generate images; - the
knp_snappy.pdfservice allows you to generate pdf files.
// @var Knp\Snappy\Image
$knpSnappyImage->generate('http://www.google.fr', '/path/to/the/image.jpg');// @var Knp\Snappy\Pdf
$knpSnappyPdf->generate('http://www.google.fr', '/path/to/the/file.pdf');// @var Knp\Snappy\Pdf
$knpSnappyPdf->generate(array('http://www.google.fr', 'http://www.knplabs.com', 'http://www.google.com'), '/path/to/the/file.pdf');// @var Knp\Snappy\Pdf
$knpSnappyPdf->generateFromHtml(
$this->renderView(
'MyBundle:Foo:bar.html.twig',
array(
'some' => $vars
)
),
'/path/to/the/file.pdf'
);use Knp\Bundle\SnappyBundle\Snappy\Response\JpegResponse;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
class SomeController extends AbstractController
{
public function imageAction(Knp\Snappy\Image $knpSnappyImage)
{
$html = $this->renderView('MyBundle:Foo:bar.html.twig', array(
'some' => $vars
));
return new JpegResponse(
$knpSnappyImage->getOutputFromHtml($html),
'image.jpg'
);
}
}use Knp\Bundle\SnappyBundle\Snappy\Response\PdfResponse;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
class SomeController extends AbstractController
{
public function pdfAction(Knp\Snappy\Pdf $knpSnappyPdf)
{
$html = $this->renderView('MyBundle:Foo:bar.html.twig', array(
'some' => $vars
));
return new PdfResponse(
$knpSnappyPdf->getOutputFromHtml($html),
'file.pdf'
);
}
}use Knp\Bundle\SnappyBundle\Snappy\Response\PdfResponse;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
class SomeController extends AbstractController
{
public function pdfAction(Knp\Snappy\Pdf $knpSnappyPdf)
{
$pageUrl = $this->generateUrl('homepage', array(), true); // use absolute path!
return new PdfResponse(
$knpSnappyPdf->getOutput($pageUrl),
'file.pdf'
);
}
}KNPLabs is looking for maintainers (see why).
If you are interested, feel free to open a PR to ask to be added as a maintainer.
We’ll be glad to hear from you :)
SnappyBundle and Snappy are based on the awesome wkhtmltopdf. SnappyBundle has been developed by KnpLabs.