private function readDefault(int $readLength): string
    {
        $body = $buffer = '';
        $read = 0;
        while ($read < $readLength && !$this->socket->eof()) {
            $buffer  = $this->socket->read($readLength);
            $read   += strlen($buffer);
            $body   .= $buffer;
        }

        return $body;
    }