/**
* get access token of from service, has to be called after successful authorization
*
* @param string $code optional, if no code given method tries to get it out of $_GET
*/
public function getAccessToken($code = null)
{
if (!$code) {
if (!isset($_GET['code'])) {
throw new OAuth2_Exception('could not retrieve code out of callback request and no code given');
}
$code = $_GET['code'];
}
$parameters = array('grant_type' => 'authorization_code', 'type' => 'web_server', 'client_id' => $this->_client->getClientKey(), 'client_secret' => $this->_client->getClientSecret(), 'redirect_uri' => $this->_client->getCallbackUrl(), 'code' => $code);
if ($this->_scope) {
$parameters['scope'] = $this->_scope;
}
if ($this->_state) {
$parameters['state'] = $this->_state;
}
$http = new OAuth2_HttpClient($this->_configuration->getAccessTokenEndpoint(), 'POST', http_build_query($parameters));
$http->execute();
$this->_parseAccessTokenResponse($http);
}
