How to handle HTTP error in the client side?

Question

What is the best way to handle HTTP errors (404, 503, etc.) when submitting a crucial data on the server?

Possible solutions I came up with:

• having the data stored in the session for later submission (data is lost if session expired)
• have the data downloaded by the user and manually submit it again
• is it possible to store the data as cookie?

Answer 1

Yes, You can store data at cookie.
Or you can store data by ajax before your 'real' data submit.

like this ..

function doSubmit() {

    // It will store the crucial data at server side.
    try {
        $.ajax({
           ...
           url : /temporary/storeData.do,
           data : {
                      // Your crucial data will be located here.
                  },
           ...
        });
    } catch (e) {
        // Error Handling for '$.ajax.error'.
        return;
    }

    // It's your real submit.
    document.aform.submit();
}