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<?php |
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namespace Sludio\HelperBundle\Guzzle\GuzzleHttp\Middleware; |
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use GuzzleHttp\Promise\FulfilledPromise; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Sludio\HelperBundle\Guzzle\Cache\StorageAdapterInterface; |
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class CacheMiddleware |
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{ |
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const DEBUG_HEADER = 'X-Guzzle-Cache'; |
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const DEBUG_HEADER_HIT = 'HIT'; |
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const DEBUG_HEADER_MISS = 'MISS'; |
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protected $adapter; |
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protected $debug; |
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public function __construct(StorageAdapterInterface $adapter, $debug = false) |
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{ |
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$this->adapter = $adapter; |
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$this->debug = $debug; |
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} |
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public function __invoke(callable $handler) |
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{ |
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return function(RequestInterface $request, array $options) use ($handler) { |
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if (!$response = $this->adapter->fetch($request)) { |
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return $this->handleSave($handler, $request, $options); |
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} |
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$response = $this->addDebugHeader($response, static::DEBUG_HEADER_HIT); |
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return new FulfilledPromise($response); |
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}; |
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} |
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protected function handleSave(callable $handler, RequestInterface $request, array $options) |
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{ |
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return $handler($request, $options)->then(function(ResponseInterface $response) use ($request) { |
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$code = (int)floor((int)$response->getStatusCode() / 100); |
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if ($code === 2) { |
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$this->adapter->save($request, $response); |
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} |
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return $this->addDebugHeader($response, static::DEBUG_HEADER_MISS); |
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}); |
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} |
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protected function addDebugHeader(ResponseInterface $response, $value) |
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{ |
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if (!$this->debug) { |
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return $response; |
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} |
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return $response->withHeader(static::DEBUG_HEADER, $value); |
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} |
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} |
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ozo2003 /
HelperBundle
