How to get or create Context in HttpCacheHitEvent subscriber?-CodePudding

I have a subscriber class subscribing to HttpCacheHitEvent. I want to extract context specific data from other objects. I have been using Context::createDefaultContext() before, but that does not account different parameters of the request such as the locale.

Whats the best way to get or create a context from HttpCacheHitEvent?

CodePudding user response：

You have to start the session, grab the token of it and resolve than the Context using SalesChannelContextFactory.

I cannot recommend doing this as it will make the HttpCache much slower. Maybe you can set cookies to the browser and use them there?

CodePudding user response：

You can inject the service SalesChannelRequestContextResolver and use it in combination with the router service to assemble a SalesChannelContext (and subsequently the Context) from the resolved Request.

<service id="Foo\MyPlugin\CacheHitListener">
    <argument type="service" id="router"/>
    <argument type="service" id="Shopware\Core\Framework\Routing\SalesChannelRequestContextResolver"/>
    <tag name="kernel.event_subscriber"/>
</service>

class CacheHitListener implements EventSubscriberInterface
{
    private $matcher;

    private RequestContextResolverInterface $contextResolver;

    /**
     * @param UrlMatcherInterface|RequestMatcherInterface $matcher
     */
    public function __construct($matcher, RequestContextResolverInterface $contextResolver)
    {
        $this->matcher = $matcher;
        $this->contextResolver = $contextResolver;
    }

    public static function getSubscribedEvents(): array
    {
        return [HttpCacheHitEvent::class => 'onCacheHit'];
    }

    public function onCacheHit(HttpCacheHitEvent $event): void
    {
        if ($this->matcher instanceof RequestMatcherInterface) {
            $parameters = $this->matcher->matchRequest($event->getRequest());
        } else {
            $parameters = $this->matcher->match($event->getRequest()->getPathInfo());
        }

        $event->getRequest()->attributes->add($parameters);

        $this->contextResolver->resolve($event->getRequest());

        $context = $event->getRequest()->attributes->get(PlatformRequest::ATTRIBUTE_CONTEXT_OBJECT);

        // ...
    }
}

You can also get the SalesChannelContext like this:

$request->attributes->get(PlatformRequest::ATTRIBUTE_SALES_CHANNEL_CONTEXT_OBJECT);