/**
* Fetch data from given URL
* @param string $url An url
*/
function fetchFromURL($url)
{
global $wgExternalServers;
#
# URLs have the form DB://cluster/id, e.g.
# DB://cluster1/3298247
#
$path = explode('/', $url);
$cluster = $path[2];
$id = $path[3];
$lb = LoadBalancer::NewFromParams($wgExternalServers[$cluster]);
$db = $lb->getConnection(DB_SLAVE);
$ret = $db->selectField('blobs', 'blob_text', array('blob_id' => $id));
return $ret;
}
