public function getMimeFromExt($sExt)
    {
        $sExt   = $this->sanitiseExtension($sExt);
        $aMimes = $this->oMimeService->getMimesForExtension($sExt);
        $sMime  = reset($aMimes);
        return !empty($sMime) ? $sMime : 'application/octet-stream';
    }