/**
* Execute access token request and return response retuned by server
*
* @param string $_tokenEndPoint token end point url
* @param array $_params list of parameters required to execute request
* @param int $_clientAuthType client authentication type
* @param array any additional header that needs to be sent e.g. array('Conent-Type' =>'application/json');
* @param string method method type e.g. 'GET', 'POST', 'DELETE', 'PUT'
*
* @return mixed response retuned by server
* @throws SWIFT_OAuth2Exception if failed to execute request
*/
public function AccessTokenRequest($_tokenEndPoint, array $_params, $_clientAuthType = self::AUTH_TYPE_AUTHORIZATION_FORM, array $_headers = array(), $_method = 'POST')
{
$_params = $this->CheckTokenRequestParams($_params);
if (($_clientAuthType == self::AUTH_TYPE_AUTHORIZATION_FORM || $_clientAuthType == self::AUTH_TYPE_AUTHORIZATION_BASIC) && (!isset($_params['client_id']) || !isset($_params['client_secret']))) {
throw new SWIFT_OAuth2Exception('AUTH_TYPE_AUTHORIZATION_FORM requires client_id and client_secret to be given in params');
}
if ($_clientAuthType == self::AUTH_TYPE_AUTHORIZATION_BASIC && !isset($_headers['Authorization'])) {
$_headers['Authorization'] = 'Basic ' . base64_encode($_params['client_id'] . ':' . $_params['client_secret']);
}
$_params = $this->ChangeParamNames($_params);
//execute request
$_CurlInstance = SWIFT_HttpCurl::GetInstance();
$_paramsStr = http_build_query($_params);
$_defaultHeaders['Content-Type'] = 'application/x-www-form-urlencoded';
$_headers = $_headers + $_defaultHeaders;
return $_CurlInstance->SendRequest($_tokenEndPoint, $_paramsStr, $_method, $_headers);
}
