Question

This is the XMLHttpRequest:

$.ajax({     method: 'get',     url: 'getPage.php',     data: $data,     dataType: 'json',     timeout: 2000,     success: function(result) {         handleContent(result);         }     }); 

This is getPage.php?data=data

header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $offset) . ' GMT'); header('Cache-Control: max-age=' . $offset . ', public'); header('HTTP/1.1 301 Moved Permanently'); header('Location: $location); 

This is $location:

header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $offset) . ' GMT'); header('Cache-Control: max-age=' . $offset . ', public'); print $print; 

The client browser properly caches $location. However it does not cache the redirect in getPage.php?data=data

Every time the ajax-request is called it requests a GET getPage.php?data=data.

I would like it to automatically GET $location instead (or rather try GET $location and get the page from cache).

Is this not what 301 Permanent Redirect is for? Creating a redirect which is cached by the browser (plus some proxy, search engine etc. stuff of course)?

Please do not question why I choose to do it this way. I have reasons for this which I am not going to go into here. All I want is an answer and possibly a solution which lets the 301 redirect get cached resulting in no GET requests at all after a first request.

Thanks in advance!

Answer 1

Edit: most browsers now (November 2013) do cache redirects, see Browserscope (the ‘Cache Redirects’ test), but they didn’t at the time the question was asked.