/**
* refresh access token
*
* @param OAuth2_Token $token
*/
public function refreshAccessToken(OAuth2_Token $token)
{
if (!$token->getRefreshToken()) {
throw new OAuth2_Exception('could not refresh access token, no refresh token available');
}
$parameters = array('grant_type' => 'refresh_token', 'type' => 'web_server', 'client_id' => $this->_client->getClientKey(), 'client_secret' => $this->_client->getClientSecret(), 'refresh_token' => $token->getRefreshToken());
$http = new OAuth2_HttpClient($this->_configuration->getAccessTokenEndpoint(), 'POST', http_build_query($parameters));
$http->execute();
$this->_parseAccessTokenResponse($http);
}