protected function httpConnect()
    {
        $this->client = new Client(array('timeout' => $this->timeout));
        $this->client->setUserAgent($this->userAgent);
        $this->client->setBaseURL(sprintf(
            '%s://%s:%d',
            $this->connectionUrlInfo['scheme'],
            $this->connectionUrlInfo['host'],
            $this->connectionUrlInfo['port']
        ));
    }