extractHost example

 else {
            ++$this->redirectCount;
        }

        $originalUri = $uri;

        $uri = $this->getAbsoluteUri($uri);

        $server = array_merge($this->server, $server);

        if (!empty($server['HTTP_HOST']) && null === parse_url($originalUri, \PHP_URL_HOST)) {
            $uri = preg_replace('{^(https?\://)'.preg_quote($this->extractHost($uri)).'}', '${1}'.$server['HTTP_HOST'], $uri);
        }

        if (isset($server['HTTPS']) && null === parse_url($originalUri, \PHP_URL_SCHEME)) {
            $uri = preg_replace('{^'.parse_url($uri, \PHP_URL_SCHEME).'}', $server['HTTPS'] ? 'https' : 'http', $uri);
        }

        if (!isset($server['HTTP_REFERER']) && !$this->history->isEmpty()) {
            $server['HTTP_REFERER'] = $this->history->current()->getUri();
        }

        if (empty($server['HTTP_HOST'])) {