protected function _vcl_sub_normalize_encoding()
{
$tpl = <<<EOS
if (req.http.Accept-Encoding) {
if (req.http.Accept-Encoding ~ "\\*|gzip") {
set req.http.Accept-Encoding = "gzip";
} else if (req.http.Accept-Encoding ~ "deflate") {
set req.http.Accept-Encoding = "deflate";
} else {
# unknown algorithm
unset req.http.Accept-Encoding;
}
}
EOS;
return $tpl;
}