/**
* Get an OAuth2 access token for the applications service account without
* caching the result. Usually getAccessToken($scopes) should be used instead
* which calls this method and caches the result in memcache.
*
* @param array $scopes The scopes to acquire the access token for.
* Can be either a single string or an array of strings.
*
* @throws InvalidArgumentException If $scopes is not a string or an array of
* strings.
* @throws AppIdentityException If there is an error using the AppIdentity
* service.
*
* @return array An array with the following key/value pairs.
* 'access_token' - The access token for the application.
* 'expiration_time' - The expiration time for the access token.
*/
private static function getAccessTokenUncached($scopes)
{
$req = new GetAccessTokenRequest();
$resp = new GetAccessTokenResponse();
if (is_string($scopes)) {
$req->addScope($scopes);
} else {
if (is_array($scopes)) {
foreach ($scopes as $scope) {
if (is_string($scope)) {
$req->addScope($scope);
} else {
throw new \InvalidArgumentException('Invalid scope ' . $scope);
}
}
} else {
throw new \InvalidArgumentException('Invalid scope ' . $scopes);
}
}
try {
ApiProxy::makeSyncCall(self::PACKAGE_NAME, 'GetAccessToken', $req, $resp);
} catch (ApplicationError $e) {
throw AppIdentityService::applicationErrorToException($e);
}
return ['access_token' => $resp->getAccessToken(), 'expiration_time' => $resp->getExpirationTime()];
}
