public function curlPostOut($url, $params = array(), $proxy = '') {
        return self::curlPostAction($url, $params, true, $proxy);
    }
public function curlPostOut($url, $params = array(), $proxy = '') {
        return self::curlPostAction($url, $params, true, $proxy);
    }
public function curlPostOut ( $ url , $ params = array ( ) , $ proxy = '' ) { return self :: curlPostAction ( $ url , $ params , true , $ proxy ) ; }
Prepare cURL resource for POST OAuth Echo request.

@param string $url     full URL.
@param mixed  $params  1-demensional array or query string.
@param string [$proxy] full proxy URL.
e.g. https://111.222.333.444:8080
@return resource cURL
@throws TwistException
Prepare cURL resource for POST OAuth Echo request .