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<?php |
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namespace Happyr\GoogleSiteAuthenticatorBundle\Service; |
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use Happyr\GoogleSiteAuthenticatorBundle\Model\AccessToken; |
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use Happyr\GoogleSiteAuthenticatorBundle\Model\TokenConfig; |
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use Psr\Cache\CacheItemPoolInterface; |
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/** |
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* @author Tobias Nyholm <[email protected]> |
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*/ |
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class ClientProvider |
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{ |
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/** |
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* @var \Happyr\GoogleSiteAuthenticatorBundle\Model\TokenConfig config |
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*/ |
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private $config; |
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/** |
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* @var CacheItemPoolInterface storage |
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*/ |
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private $pool; |
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/** |
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* @param TokenConfig $config |
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* @param CacheItemPoolInterface $pool |
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*/ |
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public function __construct(TokenConfig $config, CacheItemPoolInterface $pool) |
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{ |
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$this->config = $config; |
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$this->pool = $pool; |
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} |
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/** |
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* @param string|null $tokenName |
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* |
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* @return \Google_Client |
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*/ |
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public function getClient($tokenName = null) |
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{ |
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$client = new \Google_Client(); |
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// Set values from configuration |
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$client->setApplicationName($this->config->getApplicationName()); |
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$client->setClientId($this->config->getClientId($tokenName)); |
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$client->setClientSecret($this->config->getSecret($tokenName)); |
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$client->setRedirectUri($this->config->getRedirectUrl($tokenName)); |
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$client->setScopes($this->config->getScopes($tokenName)); |
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if (null !== $accessToken = $this->getAccessToken($tokenName)) { |
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// set access token to client if we got one |
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$client->setAccessToken((string) $accessToken); |
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// make sure to refresh the stored access token |
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$this->refreshToken($client); |
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} |
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return $client; |
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} |
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/** |
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* Check if a token is valid. |
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* This is an expensive operation that makes multiple API calls. |
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* |
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* @param string|null $tokenName |
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* |
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* @return bool |
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*/ |
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public function isTokenValid($tokenName = null) |
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{ |
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// We must fetch the client here. A client will automatically refresh the stored access token. |
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$client = $this->getClient($tokenName); |
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if (null === $accessToken = $client->getAccessToken()) { |
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return false; |
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} |
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// Get the token string from access token |
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$token = json_decode($accessToken)->access_token; |
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$url = sprintf('https://www.google.com/accounts/AuthSubTokenInfo?bearer_token=%s', $token); |
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if (false === @file_get_contents($url)) { |
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return false; |
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} |
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// Retrieve HTTP status code |
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list($version, $statusCode, $msg) = explode(' ', $http_response_header[0], 3); |
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return $statusCode == 200; |
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} |
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/** |
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* Store the access token in the storage. |
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* |
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* @param string $accessToken |
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* @param string|null $tokenName |
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*/ |
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public function setAccessToken($accessToken, $tokenName = null) |
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{ |
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$name = $this->config->getKey($tokenName); |
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$cacheKey = $this->creteCacheKey($name); |
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if ($accessToken === null) { |
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$this->pool->deleteItem($cacheKey); |
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return; |
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} |
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$item = $this->pool->getItem($cacheKey)->set(new AccessToken($name, $accessToken)); |
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$this->pool->save($item); |
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} |
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/** |
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* Get access token from storage. |
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* |
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* @param string|null $tokenName |
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* |
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* @return AccessToken|null |
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*/ |
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protected function getAccessToken($tokenName = null) |
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{ |
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$cacheKey = $this->creteCacheKey($this->config->getKey($tokenName)); |
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$item = $this->pool->getItem($cacheKey); |
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if (!$item->isHit()) { |
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return; |
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} |
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return $item->get(); |
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} |
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/** |
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* If we got a refresh token, use it to retrieve a good access token. |
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* |
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* @param \Google_Client $client |
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*/ |
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private function refreshToken(\Google_Client $client) |
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{ |
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$accessToken = $client->getAccessToken(); |
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$data = json_decode($accessToken, true); |
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try { |
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if (isset($data['refresh_token'])) { |
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$client->refreshToken($data['refresh_token']); |
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return true; |
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} |
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} catch (\Google_Auth_Exception $e) { |
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} |
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return false; |
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} |
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/** |
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* Create a cache key. |
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* |
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* @param string $name |
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* |
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* @return string |
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*/ |
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private function creteCacheKey($name) |
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{ |
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return sha1('happyr_google-site-authenticator_'.$name); |
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} |
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} |
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This checks looks for assignemnts to variables using the
list(...)function, where not all assigned variables are subsequently used.Consider the following code example.
Only the variables
$aand$care used. There was no need to assign$b.Instead, the list call could have been.