事件

Name: SymfonyDay Chicago 2025
Start: 2025-03-17
End: 2025-03-17

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此扩展包中可用的事件有 PRE_RESOLVE 和 POST_RESOLVE。两者都接收 CacheResolveEvent 作为事件。

PRE_RESOLVE

在生成缓存过滤图像的 URL 之前调用。

POST_RESOLVE

在生成缓存过滤图像的 URL 之后调用。

示例：签名 URL

这是一个关于用户媒体与不同过滤器和 IONOS 的 S3 的实现示例。最后，我们将更新 URL 以获取对私有资源的临时签名 URL

首先，我们需要配置适配器和将加载图像的文件系统。通常不需要配置缓存图像的存储位置，但下一步我们将需要它来生成签名 URL。

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        #oneup_flysystem.yaml

oneup_flysystem:
    adapters:
        # Original image addapter
        user_adapter:
            awss3v3:
                client: Aws\S3\S3Client
                bucket: '%env(IONOS_S3_BUCKET_NAME)%'
                prefix: "users" # Original image location

        # One adapter per filter and the location of the generated images, with the cache_prefix
        user_thumbnail_adapter:
            awss3v3:
                client: Aws\S3\S3Client
                bucket: '%env(IONOS_S3_BUCKET_NAME)%'
                prefix: "cache/user_thumbnail"
        user_medium_adapter:
            awss3v3:
                client: Aws\S3\S3Client
                bucket: '%env(IONOS_S3_BUCKET_NAME)%'
                prefix: "cache/user_medium"

    filesystems:
        user:
            adapter: user_adapter
            mount: user
        userThumbnail:
            adapter: user_thumbnail_adapter
            mount: userThumbnail
        userMedium:
            adapter: user_medium_adapter
            mount: userMedium
    

要使缓存资源成为私有的，我们需要将解析器的 acl 配置为私有，否则生成的图像将是公开的，这不是我们在此示例中想要的。

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        liip_imagine:
    driver: "gd"
    loaders:
        user_loader:
            flysystem:
                filesystem_service: oneup_flysystem.user_filesystem

    resolvers:
        aws_s3_resolver:
            aws_s3:
                bucket: '%env(IONOS_S3_BUCKET_NAME)%'
                client_config:
                    credentials:
                        key: '%env(IONOS_S3_ACCESS_ID)%'
                        secret: '%env(IONOS_S3_ACCESS_SECRET)%'
                    endpoint: '%env(IONOS_S3_ENDPOINT)%'
                    region: '%env(IONOS_S3_REGION)%'
                    version: '%env(IONOS_S3_VERSION)%'
                acl: private
                cache_prefix: cache

                get_options:
                    Scheme: 'https'
                put_options:
                    CacheControl: 'max-age=86400'
    cache: aws_s3_resolver
        filter_sets:
            cache: ~
            user_thumbnail:
                cache: aws_s3_resolver
                quality: 75
                filters:
                    thumbnail: { size: [ 130, 130 ], mode: outbound }
                data_loader: user_loader
            user_medium:
                cache: aws_s3_resolver
                quality: 75
                filters:
                    thumbnail: { size: [ 302, 180 ], mode: outbound }
                data_loader: user_loader
    

最后，我们创建一个 post resolve 订阅器来更新到私有资源位置的 URL。

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        namespace App\EventSubscriber;

use App\Enum\MediaFilterEnum;
use App\Repository\MediaRepository;
use League\Flysystem\FilesystemOperator;
use Liip\ImagineBundle\Events\CacheResolveEvent;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;

class LiipImagineFilterSubscriber implements EventSubscriberInterface
{
    public function __construct(
        private readonly FilesystemOperator $userThumbnailFilesystem,
        private readonly FilesystemOperator $userMediumFilesystem
    )
    {
    }

    public function onPostResolve(CacheResolveEvent $event): void
    {
        $path = $event->getPath();
        $filter = $event->getFilter();

        $date = new \DateTime();
        // We set the expiration in 10 minutes for example.
        $date = $date->add(new \DateInterval('PT10M'));

        if ($filter === MediaFilterEnum::USER_THUMBNAIL->value) {
                $url = $this->userThumbnailFilesystem->temporaryUrl($path, $date);
        }
        else if ($filter === MediaFilterEnum::USER_MEDIUM->value) {
                $url = $this->userMediumFilesystem->temporaryUrl($path, $date);
        }

        if (isset($url)) {
            $event->setUrl($url);
        }
    }

    public static function getSubscribedEvents(): array
    {
        return [
            'liip_imagine.post_resolve' => 'onPostResolve'
        ];
    }
}
    

现在，您将获得一个正确的签名 URL 来获取您的私有资源。

本作品，包括代码示例，根据 Creative Commons BY-SA 3.0 许可协议获得许可。

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