Prevent iOS 6 from Caching Ajax POST Requests

Question

Possible Duplicate:
Is Safari on iOS 6 caching $.ajax results?

I have a hybrid application using PhoneGap that runs fine on Android and iOS. But when I started testing in iOS 6 I noticed that I am not getting server data for most of my ajax calls - instead I was getting the cached data from previous ajax calls.

So far I have tried the following options to disable cache -

1. Include a timestamp as query string parameter
2. $.ajaxSetup({ cache: false });
3. Inside the ajax call no-cache = true
4. $.ajaxPrefilter(function (options, originalOptions, jqXHR) { options.data = jQuery.param($.extend(originalOptions.data||{}, { timeStamp: new Date().getTime() })); });

But none of these seems to be working. I am invoke Java action classes from my ajax calls - will it have something to do with the reason why the methods listed above are failing?

Answer 1

How to fix it: There are various methods to prevent caching of requests. The recommended method is adding a no-cache header.

This is how it is done.

jQuery:

Check for iOS 6.0 and set Ajax header like this.

$.ajaxSetup({ cache: false });

ZeptoJS :

Check for iOS 6.0 and set Ajax header like this.

$.ajax({
type: 'POST',
headers : { "cache-control": "no-cache" },
url : ,
data:,
dataType : 'json',
success : function(responseText) {…}

Server side

Java :

httpResponse.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");

Make sure to add this at the top the page before any data is sent to the client.

.NET

Response.Cache.SetNoStore();

Or

Response.Cache.SetCacheability(System.Web.HttpCacheability.NoCache);

PHP

header('Cache-Control: no-cache, no-store, must-revalidate'); // HTTP 1.1.
header('Pragma: no-cache'); // HTTP 1.0.

Answer 2

Read this thread

Is Safari on iOS 6 caching $.ajax results?

You could disable the caching on webserver level and by using timestamps in the URL.