/**
* @return string
*/
function getText()
{
$fname = 'HistoryBlobStub::getText';
if (isset(self::$blobCache[$this->mOldId])) {
$obj = self::$blobCache[$this->mOldId];
} else {
$dbr = wfGetDB(DB_SLAVE);
$row = $dbr->selectRow('text', array('old_flags', 'old_text'), array('old_id' => $this->mOldId));
if (!$row) {
return false;
}
$flags = explode(',', $row->old_flags);
if (in_array('external', $flags)) {
$url = $row->old_text;
$parts = explode('://', $url, 2);
if (!isset($parts[1]) || $parts[1] == '') {
wfProfileOut($fname);
return false;
}
$row->old_text = ExternalStore::fetchFromUrl($url);
}
if (!in_array('object', $flags)) {
return false;
}
if (in_array('gzip', $flags)) {
// This shouldn't happen, but a bug in the compress script
// may at times gzip-compress a HistoryBlob object row.
$obj = unserialize(gzinflate($row->old_text));
} else {
$obj = unserialize($row->old_text);
}
if (!is_object($obj)) {
// Correct for old double-serialization bug.
$obj = unserialize($obj);
}
if (!is_object($obj)) {
return false;
}
// Save this item for reference; if pulling many
// items in a row we'll likely use it again.
$obj->uncompress();
self::$blobCache = array($this->mOldId => $obj);
}
return $obj->getItem($this->mHash);
}
