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<?php |
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/** |
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* HttpLoader |
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*/ |
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namespace Graviton\ProxyBundle\Definition\Loader; |
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use Graviton\ProxyBundle\Definition\ApiDefinition; |
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use Graviton\ProxyBundle\Definition\Loader\DispersalStrategy\DispersalStrategyInterface; |
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use Doctrine\Common\Cache\CacheProvider; |
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use GuzzleHttp\Exception\RequestException; |
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use GuzzleHttp\Psr7\Request; |
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use Proxy\Adapter\AdapterInterface; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Log\LoggerInterface; |
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use Symfony\Component\Validator\Constraints\Url; |
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use Symfony\Component\Validator\Validator\ValidatorInterface; |
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/** |
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* load a file over http and process the data |
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* |
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* @author List of contributors <https://github.com/libgraviton/graviton/graphs/contributors> |
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* @license http://opensource.org/licenses/gpl-license.php GNU Public License |
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* @link http://swisscom.ch |
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*/ |
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class HttpLoader implements LoaderInterface |
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{ |
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/** |
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* @var ValidatorInterface |
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*/ |
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private $validator; |
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/** |
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* @var AdapterInterface |
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*/ |
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private $client; |
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/** |
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* @var LoggerInterface |
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*/ |
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private $logger; |
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/** |
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* @var DispersalStrategyInterface |
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*/ |
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private $strategy; |
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/** |
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* doctrine cache |
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* |
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* @var CacheProvider |
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*/ |
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private $cache; |
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/** |
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* doctrine cache lifetime |
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* |
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* @var int |
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*/ |
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private $cacheLifetime; |
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/** |
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* @var array |
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*/ |
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private $options = [ |
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'storeKey' => 'httpLoader', |
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]; |
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/** |
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* constructor |
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* |
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* @param ValidatorInterface $validator validator |
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* @param AdapterInterface $client http client |
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* @param LoggerInterface $logger Logger |
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*/ |
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public function __construct(ValidatorInterface $validator, AdapterInterface $client, LoggerInterface $logger) |
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{ |
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$this->validator = $validator; |
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$this->client = $client; |
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$this->logger = $logger; |
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} |
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/** |
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* @inheritDoc |
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* |
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* @param DispersalStrategyInterface $strategy dispersal strategy |
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* |
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* @return void |
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*/ |
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public function setDispersalStrategy(DispersalStrategyInterface $strategy) |
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{ |
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$this->strategy = $strategy; |
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} |
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/** |
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* @inheritDoc |
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* |
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* @param CacheProvider $cache doctrine cache provider |
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* @param string $cacheNamespace cache namespace |
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* @param int $cacheLifetime cache lifetime |
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* |
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* @return void |
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*/ |
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public function setCache(CacheProvider $cache, $cacheNamespace, $cacheLifetime) |
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{ |
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$this->cache = $cache; |
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$this->cache->setNamespace($cacheNamespace); |
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$this->cacheLifetime = $cacheLifetime; |
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} |
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/** |
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* @inheritDoc |
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* |
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* @param array $options cache strategy |
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* |
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* @return void |
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*/ |
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public function setOptions($options) |
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{ |
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if (!empty($options['prefix'])) { |
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$options['storeKey'] = $options['prefix']; |
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unset($options['prefix']); |
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} |
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$this->options = array_merge($this->options, $options); |
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} |
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/** |
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* check if the url is valid |
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* |
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* @param string $url url |
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* |
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* @return boolean |
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*/ |
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public function supports($url) |
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{ |
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$error = $this->validator->validate($url, [new Url()]); |
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return 0 === count($error); |
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} |
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/** |
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* @inheritDoc |
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* |
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* @param string $input url |
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* |
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* @return ApiDefinition |
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*/ |
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public function load($input) |
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{ |
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$retVal = new ApiDefinition(); |
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if (isset($this->strategy)) { |
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if (isset($this->cache) && $this->cache->contains($this->options['storeKey'])) { |
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$content = $this->cache->fetch($this->options['storeKey']); |
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} |
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$request = new Request('GET', $input); |
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if (empty($content)) { |
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$content = $this->fetchFile($request); |
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} |
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// store current host (name or ip) serving the API. This MUST be the host only and does not include the |
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// scheme nor sub-paths. It MAY include a port. If the host is not included, the host serving the |
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// documentation is to be used (including the port) |
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$fallbackHost = array(); |
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$fallbackHost['host'] = sprintf( |
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'%s://%s:%d', |
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$request->getUri()->getScheme(), |
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$request->getUri()->getHost(), |
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$request->getUri()->getPort() |
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); |
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if ($this->strategy->supports($content)) { |
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$retVal = $this->strategy->process($content, $fallbackHost); |
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} |
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} |
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return $retVal; |
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} |
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/** |
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* fetch file from remote destination |
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* |
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* @param RequestInterface $request request |
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* |
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* @return string |
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*/ |
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private function fetchFile(RequestInterface $request) |
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{ |
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$content = "{}"; |
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try { |
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$response = $this->client->send($request); |
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$content = (string) $response->getBody(); |
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if (isset($this->cache)) { |
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$this->cache->save($this->options['storeKey'], $content, $this->cacheLifetime); |
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} |
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} catch (RequestException $e) { |
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$this->logger->info( |
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"Unable to fetch File!", |
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[ |
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"message" => $e->getMessage(), |
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"url" => $request->getRequestTarget(), |
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"code" => (!empty($e->getResponse())? $e->getResponse()->getStatusCode() : 500) |
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] |
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); |
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} |
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return $content; |
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} |
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} |
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libgraviton /
graviton
