Ajax cache disabling Solution

We all know that the main reason why AJAX can increase the page loading speed is that it reduces the loading of duplicate data through Ajax, that is, it caches the data in the browser memory while loading the data, once the data is loaded, as long as the page is not refreshed, the data is always cached in the memory. When you view the data again, you do not need to obtain the data from the server, this greatly reduces the server load and improves the user experience.

However, sometimes, after data is written, the cached information is often read again, resulting in the read information being not up-to-date. To ensure that the information we read is up-to-date, we need to disable the caching function. The solution is as follows:

1. Add anyajaxobj. setRequestHeader ("If-modified-since", "0") before Ajax sends a request ");

2. Add anyajaxobj. setRequestHeader ("cache-control", "No-Cache") before Ajax sends a request ");

3. Add "? Fresh = "+ math. Random (); // Of course, the fresh parameter can be any one here

4. Add "? Timestamp = "+ new date (). gettime ();