java - 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-Control", "no-cache");
    response.setHeader("expires","-1");
    response.setHeader("pragma","no-cache");

But I see Safari4.0 on MAC is Caching the Ajax request(We have a requirment to support this). Fire Fox never a problem. Regarding this "Expire" i am setting it to -1, i see lot of places it is set 0 or some old date from past. Will it make a difference?

Answer 1

Send an extra parameter with your GET request that will never be the same, for example, the current timestamp. Something like:

url = url + '&nocache=' + new Date().getTime();

This will prevent caching.