How to disable Ajax caching?

Question

I am having an issue with ajax caching, This was a problem in IE browser too but i fixed it by Writing the Following code.

    response.setHeader(\"Cache-Co         


        

Answer 1

According to RFC 2616 section 9.5 about POST

   Responses to this method are not cacheable, unless the response
   includes appropriate Cache-Control or Expires header fields. However,
   the 303 (See Other) response can be used to direct the user agent to
   retrieve a cacheable resource.

So, the browser must not cache POST responses, unless the response specifies otherwise. In the same time, browsers may cache GET responses, unless the response specifies otherwise. So, for the requests that should not be cached, such as AJAX requests, POST is preferrable method.

If you, for any reason, don't want to use POSTs for AJAX, you should use the trick mentioned by minitech, it is in fact widely used to force browser to load current version of any resource.