/**
* Initiates authentication with the remote service and returns a
* array containing the storage system URL, CDN URL (can be empty)
* and session token.
*
* @return array
* @throws \Exception|\OpenStackStorage\Exceptions\ResponseError
* @throws \OpenStackStorage\Exceptions\AuthenticationError
* @throws \OpenStackStorage\Exceptions\AuthenticationFailed
* @throws \Exception
*/
public function authenticate()
{
$client = new Client(array('timeout' => $this->timeout));
$client->setBaseURL(sprintf('%s://%s:%d/', $this->urlInfo['scheme'], $this->urlInfo['host'], $this->urlInfo['port']));
$client->setUserAgent($this->userAgent);
try {
$response = $client->get($this->urlInfo['path'], null, $this->headers);
} catch (Exceptions\ResponseError $e) {
if (401 == $e->getCode()) {
// A status code of 401 indicates that the supplied credentials
// were not accepted by the authentication service.
throw new Exceptions\AuthenticationFailed();
}
throw $e;
}
if (isset($response['headers']['x-auth-token'])) {
$authToken = $response['headers']['x-auth-token'];
} elseif (isset($response['headers']['x-storage-token'])) {
$authToken = $response['headers']['x-storage-token'];
} else {
$authToken = null;
}
if (isset($response['headers']['x-storage-url'])) {
$storageUrl = $response['headers']['x-storage-url'];
} else {
$storageUrl = null;
}
if (!($authToken && $storageUrl)) {
throw new Exceptions\AuthenticationError('Invalid response from the authentication service.');
}
if (isset($response['headers']['x-cdn-management-url'])) {
$cdnUrl = $response['headers']['x-cdn-management-url'];
} else {
$cdnUrl = null;
}
return array($storageUrl, $cdnUrl, $authToken);
}
