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Internet Explorer Aborting AJAX Requests : FIXED

March 19, 2012

By Matt Mombrea
25 Comments

I’ve written previously on how to handle AJAX requests for Internet Explorer but recently we came across a strange issue where the requests were being aborted by IE before the response was finished being delivered. Using Fiddler and Firebug, we were able to see that the request was being made properly, and even the response was coming back properly, but at some point, IE would simply stop accepting the data if it was not a very short response.

The problem was even more perplexing because it did not happen every time and it did not happen the same in all versions of IE, in fact IE 9 had more difficulty than IE 7.

You might be familiar with the typical way of making an AJAX request using XDR for Internet Explorer. It would generally look like the following:

//USING JQUERY
if ($.browser.msie && window.XDomainRequest) {
    // Use Microsoft XDR
    var xdr = new XDomainRequest();
    xdr.open("get", "someurl");
    xdr.onload = function () {
    var JSON = $.parseJSON(xdr.responseText);
    if (JSON == null || typeof (JSON) == 'undefined')
    {
        JSON = $.parseJSON(data.firstChild.textContent);
    }
    processData(JSON);
    };
    xdr.send();
}

The process goes like this:

  1. Create the XDomainRequest object
  2. Define the request type (GET,POST) and the request path (URL) in .open()
  3. Define an event handler to capture the response in .onload()
  4. Send the request using .send()

Depending on what you are returning, this is usually all you need.If you run into the problem that we were having, you need to do a little more to fix it.

The Solution

The problem has to do with IE timing out the request even though data is being transmitted. By defining some additional event handlers and specifying a timeout value of 0, IE will not abort the request prematurely. Your mileage may vary but for us the solution was to define the following handlers as empty:

        xdr.onprogress = function () { };
        xdr.ontimeout = function () { };
        xdr.onerror = function () { };

Then wrap the send() function in a timeout declaration:

setTimeout(function () {
            xdr.send();
        }, 0);

Producing the final resulting XDR call of:

if ($.browser.msie && window.XDomainRequest) {
    // Use Microsoft XDR
    var xdr = new XDomainRequest();
    xdr.open("get", "someurl");
    xdr.onload = function () {
    var JSON = $.parseJSON(xdr.responseText);
    if (JSON == null || typeof (JSON) == 'undefined')
    {
        JSON = $.parseJSON(data.firstChild.textContent);
    }
    processData(JSON);
    };
    xdr.onprogress = function(){ };
    xdr.ontimeout = function(){ };
    xdr.onerror = function () { };
    setTimeout(function(){
        xdr.send();
    }, 0);
}
Matt Mombrea

Matt Mombrea

Matt is a longtime entrepreneur and software engineer. He also sits on the board of Computer Science at SUNY Fredonia. Born and raised in Buffalo, Matt is passionate about building and maintaining great businesses in Buffalo. Apart from leading Cypress North, Matt architects our company’s datacenter, engineers dozens of custom applications, and directs the rest of the development team.

See Matt's Most Recent Posts

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25 comments

Mark April 22, 2015Reply

Made my day. Thanks.

Anurag March 13, 2015Reply

I generally don’t comment on sites. But I just had to here. I spent an entire day figuring out the solution and you sir, solved it for me. 3 in the morning and I feel so effing happy. Thanks a lot 🙂

Josh Comley August 9, 2014Reply

Really, really, thank you. I had no idea how you worked this out, and I dread to think how much time you lost 🙁 but it solved my IE9 AJAX woes!!

Chris November 4, 2013Reply

I don’t know why this works but it works! So thank you a lot, you saved a lot of my time!

Dave September 24, 2013Reply

Thanks for the help. This was an odd problem to say the least and this does seem to work. Just out of curiosity, do you have any idea what the actual problem is and why this fixes it?

Jai September 23, 2013Reply

Here is my code which gives ‘JSON Undefined’ in IE 8, Can you please let me know how to convert this below AJAX code using XDR

var dataToSend =
{
ClientId: selClientId
};

$.ajax({
url: ”,
contentType: ‘application/json; charset=utf-8’,
type: “POST”,
data: JSON.stringify(dataToSend),
dataType: “json”,
success: function (data) {
document.getElementById(“dvClientName”).innerHTML = data[0];
}
}

});

Andrew October 18, 2013Reply

It sounds like you need to include the json2.js polyfill on your page. https://github.com/douglascrockford/JSON-js/blob/master/json2.js. This will add support for JSON.stringify and JSON.parse in older browsers.

Varun Sheth July 18, 2013Reply

New UPDATE

I got the code to work locally

// Check if the browser is IE
if($.browser.msie) {

var xdr;

// Check if the browser is IE7 or IE 10+
if(window.XDomainRequest == undefined && window.XMLHttpRequest) {

xdr = new XMLHttpRequest();

xdr.onreadystatechange = function() {
if(xdr.readyState == 4 && xdr.status == 200) {
var JSON = $.parseJSON(xdr.responseText);

if(JSON == null || typeof (JSON) == ‘undefined’) {
JSON = $.parseJSON(data.firstChild,textContent);
}

processData(JSON);

}
}
} else { // IE8, IE9
xdr = new XDomainRequest();

xdr.onload = function() {
var JSON = $.parseJSON(xdr.responseText);

if(JSON == null || typeof (JSON) == ‘undefined’) {
JSON = $.parseJSON(data.firstChild,textContent);
}
processData(JSON);
};

xdr.onprogress = function() {};
xdr.ontimeout = function() {};
xdr.onerror = function() {
alert(‘error’);
};
}

xdr.open(“post”, ajaxStatusUrl+”?buster=”+ new Date().getTime());

setTimeout(function() {
xdr.send();
}, 1000);

} else { // all other browsers

$.ajax({
type: “POST”,
url: ajaxStatusUrl+”?buster=”+ new Date().getTime(),
processData: true,
dataType: “json”,
success: function(data) {
processData(data);
}
});
}
});

But on production IE 7 is giving access denied

kenar716 May 28, 2014Reply

I tried your code for a POST call to ASP.NET Webservices asmx and your code for IE8 and IE9 always return error 500.

Varun Sheth July 18, 2013Reply

so i managed to get the ajax request working in IE with this code change

if($.browser.msie) {

if(window.XDomainRequest == undefined) {
var xdr = new ActiveXObject(‘Msxml2.XMLHTTP’);
} else {
var xdr = new XDomainRequest();
}

xdr.open(“post”, ajaxStatusUrl+”?buster=”+ new Date().getTime());

setTimeout(function() {
xdr.send();
}, 1000);

xdr.onload = function() {
var JSON = $.parseJSON(xdr.responseText);

if(JSON == null || typeof (JSON) == ‘undefined’) {
JSON = $.parseJSON(data.firstChild,textContent);
}
processData(JSON);
};

xdr.onprogress = function() {};
xdr.ontimeout = function() {};
xdr.onerror = function() {
alert(‘error’);
};

} else {

$.ajax({
type: “POST”,
url: ajaxStatusUrl+”?buster=”+ new Date().getTime(),
processData: true,
dataType: “json”,
success: function(data) {
processData(data);
}
});
}
});

however the onload function xdr.onload is throwing an error saying object doesn’t support this property or method

var xdr = new ActiveXObject(‘Microsoft.XMLHTTP’);

incase of IE 7

Varun Sheth July 18, 2013Reply

Hi Matthew thanks for your quick response, I have tried all the methods mentioned in the link however for IE7 it’s still not making the ajax request at all here is my updated code

$.ajaxSetup({ cache: false });
if($.browser.msie && window.XDomainRequest) {
var xdr = new XDomainRequest();
xdr.open(“post”, ajaxStatusUrl+”?buster=”+ new Date().getTime());

setTimeout(function() {
xdr.send();
}, 500);

xdr.onload = function() {
var JSON = $.parseJSON(xdr.responseText);

if(JSON == null || typeof (JSON) == ‘undefined’) {
JSON = $.parseJSON(data.firstChild,textContent);
}
processData(JSON);
};

xdr.onprogress = function() {};
xdr.ontimeout = function() {};
xdr.onerror = function() {
alert(‘error’);
};

} else {
$.ajax({
type: “POST”,
url: ajaxStatusUrl+”?buster=”+ new Date().getTime(),
processData: true,
dataType: “json”,
success: function(data) {
processData(data);
}
});
}
});

I also changed the server endpoint to accept post instead of get and set the response header to

header(“Cache-Control: no-cache, no-store”); header(“Expires: Sat, 26 Jul 1997 05:00:00 GMT”); // Date in the past

Varun Sheth July 17, 2013Reply

This is not working for me in IE7 it works in all other versions of IE

if($.browser.msie && window.XDomainRequest) {
var xdr = new XDomainRequest();
xdr.open(“get”, ajaxStatusUrl);

setTimeout(function() {
xdr.send();
}, 500);

xdr.onload = function() {
var JSON = $.parseJSON(xdr.responseText);

if(JSON == null || typeof (JSON) == ‘undefined’) {
JSON = $.parseJSON(data.firstChild,textContent);
}
processData(JSON);
};

xdr.onprogress = function() {};
xdr.ontimeout = function() {};
xdr.onerror = function() {
alert(‘error’);
};

} else {
$.ajax({
type: “GET”,
url: ajaxStatusUrl,
processData: true,
dataType: “json”,
success: function(data) {
processData(data);
}
});
}
});

Also fiddler is not showing a request being made, it says XDomainRequest obejct is undefined

Matthew Mombrea July 17, 2013Reply

Varun,

This could be due to a different issue with IE caching GET requests. Try changing your request to a POST instead and see if that takes care of the problem.

Or you can leave it as a GET and append the current time ticks to the ajaxStatusUrl variable. See this post for more details:
http://www.itworld.com/development/303295/ajax-requests-not-executing-or-updating-internet-explorer-solution

Damien March 11, 2013Reply

Thanks a lot for this help !

Will Durman February 24, 2013Reply

You are a god among men. I spent hours trying to figure out this goofy intermittent IE9 problem.

Michael January 18, 2013Reply

Thank you so much for this!

Grant Mills December 18, 2012Reply

Just to save anyone else that has to do this with IE some grief. You have to set the ontimeout, onprogress, onload, onerror, and timeout values AFTER the xdr.open method. Also, on this line:
setTimeout(function () {
xdr.send();
}, 0);
I had to change it to:
setTimeout(function () {
xdr.send();
}, 500);
To get it to work. My theory is that initializing this XDomainRequest object takes some time depending on the resources of the client box. 500ms was a good value for us to get a variety of host machines to work consistently.

Ray September 20, 2012Reply

I had given up on a solution until I found this. Now our IE9 users can use SVG, and not Flash! Awesome!

Mark September 18, 2012Reply

Thanks, just what I needed!

Jeffrey Cartagena September 13, 2012Reply

Thanks this helps me

Carol September 8, 2012Reply

I an not a computer buff could you ive a step by step procedure
on how to fix this “aborting” problem I have Vista basics.

David Edwards September 5, 2012Reply

Bravo. This saved me a lot of pain and anguish.

JC April 10, 2012Reply

Thanks. This helped greatly on a get json XDR that was mysteriously barfing in IE9.

It’s pathetic that IE requires one to jump through such odd hoops.

Andrew April 5, 2012Reply

This doesn’t work for a POST json operation. If I’m looking to use json data to get a request in a subdomain. Currently M$’s craptacular browsers inhibit such transfer as x-domain. The XDR seems like the only alternative to jsonp, but I’m not seeing it working.

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