OSS\Http\RequestCore::streaming_write_callback PHP Метод

    public function streaming_write_callback($curl_handle, $data)
    {
        $length = strlen($data);
        $written_total = 0;
        $written_last = 0;
        while ($written_total < $length) {
            $written_last = fwrite($this->write_stream, substr($data, $written_total));
            if ($written_last === false) {
                return $written_total;
            }
            $written_total += $written_last;
        }
        // Execute callback function
        if ($this->registered_streaming_write_callback) {
            call_user_func($this->registered_streaming_write_callback, $curl_handle, $written_total);
        }
        return $written_total;
    }