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Skip to comments (6) Disable prefetching of a page
Posted by Erik on Jan 05 2006 @ 14:13  :: 2706 unique visits

This code will disable prefetching of a page. This is usefull in for example a logout page. You don't want accelerators to try and cache that page because it would log people out.

CODE: PHP
if (isset($_SERVER['HTTP_X_MOZ']) && ($_SERVER['HTTP_X_MOZ'] == 'prefetch')) {
  header('HTTP/1.0 403 Forbidden');
  die();
}


Note: normally it is better to only use a POST request for state changes (such as logging out), but this is not always easy to do.

6 comments posted so far
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1. On Jan 06 2006 @ 02:13 TheJohnDoe2005 wrote:

Apart from adding the code to your logout pages. I read a similiar article on this code somewhere last year. Issn't this used to block "Google Web Accelerators" from prefetching your pages. It is said to be able to prefetch Admin/Secure pages that are behind authentication as well. I guess you wouldn't just want to add this code to the logout pages but to others as well.

Some Other Ways of preventing it
- Banning IPs Address from 72.14.192.* and 72.14.194.*.
- Make your admin/secure pages SSL.Google Web Accelerator will not prefetch pages using SSL (https). If all of your administration sections use SSL, you have nothing to worry about.

Read More
This news is kinda old...dated back in May 6, 2005
http://news.com.com/Google+speed+bump+draws+scorn/2100-1032_3-5698447.html?tag=nefd.top

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