etag and caching

hi

according to book I want to use etag and http caching ...

so I test it

$this->response->etag('xcvxzvddddddddddddsssssssssmf3v1vf6');
if ($this->response->checkNotModified($this->request)) {
//return $this->response;
echo 'modified';
}
else{
echo 'not modified';
}

and I change etag value manually several time to check how checkNotModified work

but never print "not modified" message

why?

--
Like Us on FaceBook https://www.facebook.com/CakePHP
Find us on Twitter http://twitter.com/CakePHP

---
You received this message because you are subscribed to the Google Groups "CakePHP" group.
To unsubscribe from this group and stop receiving emails from it, send an email to cake-php+unsubscribe@googlegroups.com.
To post to this group, send email to cake-php@googlegroups.com.
Visit this group at http://groups.google.com/group/cake-php?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.