Allow user to cancel upload javascript, xmlhttp request

Question

I have an xmlhttprequest that is posting to a webservice and is linked to the user uploading a potentially large file and I would like to be able to cancel the request based on user input. I see that the xmlhttprequest object has an abort function but as far as I can tell by watching the network tab in chrome, calling that does not actually stop sending data and free up the users bandwidth, it only affects the events

Answer 1

i would use jquery here:

var xhr = $.ajax({
type: "POST",
url: "x.php",
success: function(msg){
}
});

//kill the request
xhr.abort()