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ProxyResolver.php
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ProxyResolver.php
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<?php
/*
* This file is part of the `liip/LiipImagineBundle` project.
*
* (c) https://github.com/liip/LiipImagineBundle/graphs/contributors
*
* For the full copyright and license information, please view the LICENSE.md
* file that was distributed with this source code.
*/
namespace Liip\ImagineBundle\Imagine\Cache\Resolver;
use Liip\ImagineBundle\Binary\BinaryInterface;
/**
* ProxyResolver.
*
* @author Robert Schönthal <robert.schoenthal@gmail.com>
*/
class ProxyResolver implements ResolverInterface
{
protected ResolverInterface $resolver;
/**
* a list of proxy hosts (picks a random one for each generation to seed browser requests among multiple hosts).
*/
protected array $hosts = [];
/**
* @param string[] $hosts
*/
public function __construct(ResolverInterface $resolver, array $hosts)
{
$this->resolver = $resolver;
$this->hosts = $hosts;
}
public function resolve(string $path, string $filter): string
{
return $this->rewriteUrl($this->resolver->resolve($path, $filter));
}
public function store(BinaryInterface $binary, string $path, string $filter): void
{
$this->resolver->store($binary, $path, $filter);
}
public function isStored(string $path, string $filter): bool
{
return $this->resolver->isStored($path, $filter);
}
public function remove(array $paths, array $filters): void
{
$this->resolver->remove($paths, $filters);
}
protected function rewriteUrl(string $url): ?string
{
if (empty($this->hosts)) {
return $url;
}
$randKey = array_rand($this->hosts, 1);
// BC
if (is_numeric($randKey)) {
$port = parse_url($url, PHP_URL_PORT);
$host = parse_url($url, PHP_URL_SCHEME).'://'.parse_url($url, PHP_URL_HOST).($port ? ':'.$port : '');
$proxyHost = $this->hosts[$randKey];
return str_replace($host, $proxyHost, $url);
}
if (0 === mb_strpos($randKey, 'regexp/')) {
$regExp = mb_substr($randKey, 6);
return preg_replace($regExp, $this->hosts[$randKey], $url);
}
return str_replace($randKey, $this->hosts[$randKey], $url);
}
}