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<?php |
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namespace TreeHouse\Keystone\Client; |
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use GuzzleHttp\Client; |
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use GuzzleHttp\ClientInterface; |
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use GuzzleHttp\Exception\RequestException; |
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use GuzzleHttp\RequestOptions; |
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use Psr\Log\LoggerInterface; |
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use Psr\Log\NullLogger; |
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use TreeHouse\Cache\CacheInterface; |
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use TreeHouse\Keystone\Client\Exception\TokenException; |
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use TreeHouse\Keystone\Client\Model\Tenant; |
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use TreeHouse\Keystone\Client\Model\Token; |
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class TokenPool |
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{ |
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const TOKEN_KEY_FORMAT = 'keystone_token_3_%s'; |
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/** |
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* @var Tenant |
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*/ |
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protected $tenant; |
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/** |
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* The cache where tokens are stored. |
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* |
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* @var CacheInterface |
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*/ |
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protected $cache; |
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/** |
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* Optional logger. |
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* |
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* @var LoggerInterface |
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*/ |
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protected $logger; |
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/** |
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* Internal client to request a new token with. |
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* |
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* @var ClientInterface |
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*/ |
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protected $client; |
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/** |
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* The endpoint url that was obtained via the token. |
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* |
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* @var string |
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*/ |
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protected $endpointUrl; |
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/** |
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* Cached copy of the token id. |
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* |
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* @var string |
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*/ |
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protected $tokenId; |
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/** |
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* @param Tenant $tenant |
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* @param CacheInterface $cache |
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* @param LoggerInterface $logger |
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*/ |
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public function __construct(Tenant $tenant, CacheInterface $cache, LoggerInterface $logger = null) |
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{ |
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$this->tenant = $tenant; |
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$this->cache = $cache; |
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$this->logger = $logger ?: new NullLogger(); |
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$this->client = new Client(); |
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} |
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/** |
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* @deprecated Please use getEndpointUrl() in favor of this |
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* @return string |
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*/ |
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public function getPublicUrl() { |
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return $this->getEndpointUrl(); |
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} |
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/** |
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* @return string |
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*/ |
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public function getEndpointUrl() |
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{ |
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if (null === $this->endpointUrl) { |
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$this->getToken(); |
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} |
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return $this->endpointUrl; |
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} |
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/** |
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* @return string |
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*/ |
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public function getTokenId() |
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{ |
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if (null === $this->tokenId) { |
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$this->getToken(); |
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} |
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return $this->tokenId; |
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} |
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/** |
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* Returns a token to use for the keystone service. Uses cached instance |
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* whenever possible. |
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* |
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* @param bool $forceNew Whether to force creating a new token |
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* |
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* @return Token |
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*/ |
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public function getToken($forceNew = false) |
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{ |
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$tokenName = $this->getCacheKey(); |
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// see if token is in cache |
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if (!$forceNew && $cachedToken = $this->cache->get($tokenName)) { |
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$this->logger->debug('Obtained token from cache'); |
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$token = $this->createToken($cachedToken); |
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} |
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if (!isset($token) || !($token instanceof Token) || $token->isExpired()) { |
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// cache the token and set it to expire 5 seconds before the |
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// expiration date, to avoid any concurrence errors. |
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$token = $this->requestToken(); |
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$this->cache->set($tokenName, json_encode($token), $token->getExpirationDate()->getTimestamp() - time() - 5); |
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} |
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// cache token properties |
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$this->endpointUrl = $this->getEndpointUrlFromToken($token); |
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$this->tokenId = $token->getId(); |
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return $token; |
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} |
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/** |
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* @throws TokenException |
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* |
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* @return Token |
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*/ |
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protected function requestToken() |
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{ |
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$this->logger->debug('Requesting a new token'); |
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$data = [ |
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'auth' => [ |
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'passwordCredentials' => [ |
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'password' => $this->tenant->getPassword(), |
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'username' => $this->tenant->getUsername(), |
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], |
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], |
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]; |
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if ($name = $this->tenant->getTenantName()) { |
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$data['auth']['tenantName'] = $name; |
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} |
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try { |
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$response = $this->client->request('POST', $this->tenant->getTokenUrl(), [ |
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RequestOptions::JSON => $data, |
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]); |
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return $this->createToken($response->getBody()->getContents()); |
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} catch (RequestException $e) { |
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$this->logger->error(sprintf('Error requesting token: %s', $e->getMessage())); |
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throw new TokenException($e->getMessage(), $e->getCode(), $e); |
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} |
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} |
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/** |
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* @param string $jsonData |
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* |
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* @throws TokenException |
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* |
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* @return Token |
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*/ |
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private function createToken($jsonData) |
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{ |
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$content = json_decode($jsonData, true); |
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if (!is_array($content)) { |
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throw new TokenException(sprintf('Could not decode JSON string: "%s"', $jsonData)); |
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} |
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return Token::create($content); |
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} |
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/** |
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* @param Token $token |
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* |
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* @throws TokenException |
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* |
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* @return string |
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*/ |
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private function getEndpointUrlFromToken(Token $token) |
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{ |
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$catalog = $token->getServiceCatalog($this->tenant->getServiceType(), $this->tenant->getServiceName()); |
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// use the first endpoint that has was requested |
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$endpointType = $this->tenant->getServiceEndpoint() . 'url'; |
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foreach ($catalog as $endpoint) { |
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$endpoint = array_change_key_case($endpoint, CASE_LOWER); |
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if (array_key_exists($endpointType, $endpoint)) { |
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return $endpoint[$endpointType]; |
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} |
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} |
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throw new TokenException('No endpoint with a ' . $this->tenant->getServiceEndpoint() . ' url found'); |
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} |
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/** |
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* @return string |
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*/ |
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private function getCacheKey() |
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{ |
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return sprintf(self::TOKEN_KEY_FORMAT, rawurlencode($this->tenant->getTokenUrl())); |
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} |
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} |
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treehouselabs /
keystone-client
