/**
* If provided url does not contain scheme part, tries to add it
*
* @param string $url URL to be fixed.
* @return string Fixed URL.
*/
protected static function normalizeUrl($url)
{
if (!preg_match('#^https?://#i', $url)) {
$url = 'http://' . $url;
}
$parsedUrl = new Uri($url);
$parsedUrl->setHost(strtolower($parsedUrl->getHost()));
return $parsedUrl->getUri();
}
