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<?php |
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/** |
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* PHP Client for DDN Web Object Scalar (WOS) API |
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* |
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* @package Wosclient |
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* @author Casey McLaughlin <[email protected]> |
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* @license http://opensource.org/licenses/MIT MIT |
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* @link https://github.com/caseyamcl/wosclient |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* ------------------------------------------------------------------ |
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*/ |
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namespace WosClient; |
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use GuzzleHttp\Client; |
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use GuzzleHttp\Exception\BadResponseException; |
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use Psr\Http\Message\ResponseInterface; |
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use WosClient\Exception\InvalidResponseException; |
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use WosClient\Exception\WosServerException; |
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/** |
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* WOS Client Implementation for current/latest WOS API |
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* |
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* Tested against WOS Version 2.1.1, but should work in newer versions, so |
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* long as DDN doesn't mess with their API much. |
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* |
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* @author Casey McLaughlin <[email protected]> |
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*/ |
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class WosClient implements WosClientInterface |
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{ |
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use Helper\ValidateByteRangeTrait; |
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use Helper\ArrayToMetadataStringTrait; |
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/** |
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* @var Client |
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*/ |
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private $guzzleClient; |
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/** |
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* Build a WOS Client from parameters |
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* |
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* @param string $wosUrl |
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* @param string $wosPolicy |
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* @param array $guzzleOptions |
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* @return WosClient |
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*/ |
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public static function build($wosUrl, $wosPolicy = '', array $guzzleOptions = []) |
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{ |
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$guzzleParams = array_merge_recursive([ |
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'base_uri' => $wosUrl, |
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'headers' => [ |
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'x-ddn-policy' => $wosPolicy |
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] |
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], $guzzleOptions); |
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return new static(new Client($guzzleParams)); |
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} |
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/** |
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* WOS Client constructor |
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* |
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* The constructor expects a guzzleClient with the base_url value set, and |
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* any default options that should be used on all requests. |
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* |
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* For convenience, you probably want to set the 'x-ddn-policy' header by |
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* default. See the self::build() method above for an example of setting |
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* this. |
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* |
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* @param Client $guzzleClient |
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*/ |
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public function __construct(Client $guzzleClient) |
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{ |
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if (! isset($guzzleClient->getConfig()['base_uri'])) { |
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throw new \RuntimeException("Cannot instantiate a WosClient without 'base_uri' set in Guzzle"); |
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} |
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$this->guzzleClient = $guzzleClient; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function putObject($data, array $meta = [], $objectId = '', array $options = []) |
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{ |
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$options = array_merge_recursive([ |
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'body' => $data, |
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'headers' => array_filter([ |
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'x-ddn-meta' => $this->metadataToString($meta), |
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'x-ddn-oid' => (string) $objectId |
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]) |
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], $options); |
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$resp = $this->sendRequest( |
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'post', |
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$objectId ? '/cmd/putoid' : '/cmd/put', |
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$options |
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); |
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$this->checkResponse($resp); |
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return new WosObjectId($resp); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getObject($objectId, $byteRange = '', array $options = []) |
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{ |
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// Add range to options if specified |
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$options = array_merge_recursive([ |
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'headers' => array_filter([ |
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'range' => $byteRange ? ('bytes=' . $this->validateByteRange($byteRange)) : '' |
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]) |
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], $options); |
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$resp = $this->sendRequest('get', '/objects/' . (string) $objectId, $options); |
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$this->checkResponse($resp); |
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return new WosObject($resp); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getMetadata($objectId, array $options = []) |
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{ |
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$resp = $this->sendRequest('head', '/objects/' . $objectId, $options); |
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$this->checkResponse($resp); |
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return new WosObjectMetadata($resp); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function deleteObject($objectId, array $options = []) |
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{ |
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// OID is sent in header, not in URI |
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$options = array_merge_recursive([ |
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'headers' => [ |
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'x-ddn-oid' => (string) $objectId |
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] |
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], $options); |
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$resp = $this->sendRequest('post', '/cmd/delete', $options); |
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$this->checkResponse($resp); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function reserveObject(array $options = []) |
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{ |
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$resp = $this->sendRequest('post', '/cmd/reserve', $options); |
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$this->checkResponse($resp); |
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return new WosObjectId($resp); |
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} |
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/** |
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* @return Client |
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*/ |
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public function getHttpClient() |
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{ |
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return $this->guzzleClient; |
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} |
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/** |
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* Perform a request |
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* |
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* @param string $method |
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* @param string $path |
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* @param array $options |
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* @return ResponseInterface |
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*/ |
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public function sendRequest($method, $path, array $options = []) |
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{ |
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try { |
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return $this->guzzleClient->request($method, $path, $options); |
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} catch (BadResponseException $e) { |
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throw ($e->getResponse()->hasHeader('x-ddn-status')) |
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? new WosServerException((int) $e->getResponse()->getHeaderLine('x-ddn-status')) |
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: $e; |
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} |
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} |
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/** |
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* Process a response |
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* |
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* Ensure that this is a valid response, and |
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* convert any DDN errors into appropriate exceptions |
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* |
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* @param ResponseInterface $response |
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*/ |
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private function checkResponse(ResponseInterface $response) |
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{ |
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if (! $response->hasHeader('x-ddn-status')) { |
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throw new InvalidResponseException('x-ddn-status'); |
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} |
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$headerLine = $response->getHeaderLine('x-ddn-status'); |
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if ($headerLine{0} !== '0') { |
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throw new WosServerException((int) $response->getHeaderLine('x-ddn-status')); |
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} |
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} |
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} |
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