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<?php declare(strict_types=1); |
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namespace WyriHaximus\React\Http\Middleware; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use React\Cache\ArrayCache; |
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use React\Cache\CacheInterface; |
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use React\Http\Io\HttpBodyStream; |
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use function React\Promise\resolve; |
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use function RingCentral\Psr7\stream_for; |
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final class ResponseCacheMiddleware |
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{ |
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/** |
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* @var CacheConfigurationInterface |
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*/ |
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private $cacheConfiguration; |
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/** |
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* @var CacheInterface |
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*/ |
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private $cache; |
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/** |
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* @param CacheConfigurationInterface $cacheConfiguration |
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* @param CacheInterface|null $cache |
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*/ |
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public function __construct(CacheConfigurationInterface $cacheConfiguration, CacheInterface $cache = null) |
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{ |
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$this->cacheConfiguration = $cacheConfiguration; |
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$this->cache = $cache instanceof CacheInterface ? $cache : new ArrayCache(); |
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} |
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public function __invoke(ServerRequestInterface $request, callable $next) |
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{ |
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if (!$this->cacheConfiguration->requestIsCacheable($request)) { |
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return resolve($next($request)); |
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} |
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$key = $this->cacheConfiguration->cacheKey($request); |
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return $this->cache->get($key)->then(function ($json) use ($next, $request, $key) { |
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if ($json !== null) { |
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return $this->cacheConfiguration->cacheDecode($json); |
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} |
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return resolve($next($request))->then(function (ResponseInterface $response) use ($request, $key) { |
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if ($response->getBody() instanceof HttpBodyStream) { |
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return $response; |
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} |
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if (!$this->cacheConfiguration->responseIsCacheable($request, $response)) { |
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return $response; |
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} |
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$ttl = $this->cacheConfiguration->cacheTtl($request, $response); |
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$body = (string)$response->getBody(); |
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$encodedResponse = $this->cacheConfiguration->cacheEncode($response->withBody(stream_for($body))); |
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$this->cache->set($key, $encodedResponse, $ttl); |
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return $response->withBody(stream_for($body)); |
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}); |
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}); |
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} |
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} |
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WyriHaximus /
reactphp-http-middleware-response-cache
