javascript - ajax response byte size

Question

I'm using jQuery's getJSONP and I want to log the duration of the call and the size of the response to be able to have some statistics about the usage of my application. This is a cross domain ajax call, so I need to use JSONP, but as the JSONP call is not done with an XMLHttpRequest object, the complete callback from jquery's ajax doesn`t pass the response content.

So my question is how to get the response size (content lenght) from a JSONP call.

$.ajaxSetup(
{
    complete:function(x,e)
    {
         log(x.responseText.length, x.responseText);
    }
}

here x is a XMLHttpRequest object for a JSON call , but for JSONP call is undefined.

Answer 1

you can get the "Content-Length" of the response header:

var contentsize;
$.ajax('url', function(data, textstatus, request) {
    contentsize = request.getResponseHeader("Content-Length") / 1024;
    //do stuff with your data
});