Is Safari on iOS 6 caching $.ajax results?

Question

Since the upgrade to iOS 6, we are seeing Safari\'s web view take the liberty of caching $.ajax calls. This is in the context of a PhoneGap application so it is

Answer 1

I hope this can be of use to other developers banging their head against the wall on this one. I found that any of the following prevents Safari on iOS 6 from caching the POST response:

• adding [cache-control: no-cache] in the request headers
• adding a variable URL parameter such as the current time
• adding [pragma: no-cache] in the response headers
• adding [cache-control: no-cache] in the response headers

My solution was the following in my Javascript (all my AJAX requests are POST).

$.ajaxSetup({
    type: 'POST',
    headers: { "cache-control": "no-cache" }
});

I also add the [pragma: no-cache] header to many of my server responses.

If you use the above solution be aware that any $.ajax() calls you make that are set to global: false will NOT use the settings specified in $.ajaxSetup(), so you will need to add the headers in again.