/**
* Looks in the URL view for a symlink matching the provided
* URL and if found, returns the mtime of the link target
*
* If the link points to /dev/null, we have a URL we were unable
* to download before - if that symlink itself is older than 1 hour
* we delete it and return 0. If the symlink is younger than hour,
* we raise an exception and abort. Intended as mechanism to prevent
* repeated attempts to download the same (non 200) URL in a short
* time period
*
* @param String $bucket
* @param String $url
* @return array(time => int Unix timestamp (0 means not found), revalidate => (true|false), cache_age => int)
*/
public function getURLLastModified($bucket, $url)
{
$storage = new binarypool_storage($bucket);
$symlink = binarypool_views::getDownloadedViewPath($bucket, $url);
return $storage->getURLLastModified($url, $symlink);
}
