Restagent\Request::post PHP Метод

    function post($uri)
    {
        if (!empty($this->headers['Content-Type']) && !in_array($this->headers['Content-Type'], array('application/x-www-form-urlencoded', 'multipart/form-data'))) {
            throw new RestAgentException("You should not set content-type for HTTP POST that is not either\n                                   'application/x-www-form-urlencoded' or 'multipart/form-data'");
        }
        return $this->http_request('POST', $uri, $this->data);
    }