Why is IE 10 Refusing to send POST data via jQuery $.ajax

Question

Both in my development and production environment, IE 10 is refusing to send any POST data via a simple $.ajax call.

My script looks like this:

d = \         


        

Answer 1

Sorry, but my all attempts to reproduce your problems were without success. In other words all POSTs were with HTTP body and the Ajax requests worked correctly. So I could not reproduce the problem which you described. I made all tests on Internet Explorer 10, Windows 8 W64 RTM Enterprise with all current windows updates.

If I add some item (for example the first one) to the chat on the page you referenced I can see that POST request the the following header will be produced:

Anforderung       POST /~do HTTP/1.1
Accept            */*
Content-Type      application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With  XMLHttpRequest
Referer           https://www.steps.org.au/
Accept-Language   de-DE,de;q=0.8,ru;q=0.7,en-US;q=0.5,en;q=0.3,ja;q=0.2
Accept-Encoding   gzip, deflate
User-Agent        Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0; Touch)
Host              www.steps.org.au
Content-Length    81
DNT               1
Connection        Keep-Alive
Cache-Control     no-cache
Cookie            __utmc=91949528; __utma=91949528.365135675.1353268932.1353268932.1353268932.1; __utmb=91949528.1.10.1353268932; __utmz=91949528.1353268932.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); PHPSESSID=ka4shsgkfvnvfdcath2klh9un0; cartID=4a90a72a379989f597276ca30c79c6f6

One can see that Content-Length is 81 and it's not 0. The body is

i=1211&q=1&token=00f5e9f5768d09ae67f2016ebcb62e99a0d75345&cmd=addToCart&sideBar=1

The request will be answered with HTML fragment and the button become green.

To be exactly during adding the item to the chat it will be executed another code as you posted in your question. It will be executed the following code (lines 49-74) from shop.1352417874.js:

var n;
function inCart(i,t){
    var a = $('#add'+i);
    var q = t?1:$('#qty'+i).val();
    setLoader(a,(t?60:0),0);
    if(!t) a.addClass('loading').html('').attr('href','javascript:;');
    // d = 'i='+i+'&q='+q+'&token='+TOKEN+'&cmd=addToCart&sideBar=1';   
    $.ajax({
        data: {
            i:i,
            q:q,
            token:TOKEN,
            cmd:"addToCart",
            sideBar: 1
        },
        success: function(h){
            $('#sideCartContents').replaceWith(h);
            mkButtons();
            jsEnhance();
            setLoader();
            n=0;
            if(!t) a.removeClass('loading').addClass('green').attr('href','Shop/Checkout.html').html('Checkout').parent().find('div.QTY').html('x'+q+' in cart');
            flashCart();
        }
    });
}

The values of local i and q variables was 1211 and 1 in my test.

So I could not see any errors which you describe. So you have to debug the code in your environment where it will be reproduced. During the tests I would recommend you to use non-minimized code of jQuery. You could debug the code of jQuery.ajax to localize your problem.

Nevertheless I have some additional advice to you:

1. First of all you should include error callback to the $.ajax call and not only success callback.
2. You should review the JavaScript code which you use. In the above code fragment for example you defined global variable n which will be property of the global window object. Introduction of such variables is very dangerous because of side effects and conflicts with other JavaScript codes which you include on the page. In some other places you set new properties of global window object indirectly. For example the code of global doErrors function defined in common.1345011838.js looks as following

function doErrors(e,d){
    e=e.split(',');
    for(i in e){
        $((d?d+' ':'')+'[name="'+e[i]+'"]:visible').addClass('error');
    }
    errors();
}

In the above code you use i variable without define it. So you set (or use) window.i variable in the way. It's clear the usage of for-in loop in case of array is not good. One could rewrite the code with equivalent code like for(var i=0,l=e.length; i.

Moreover you start the code of common.1345011838.js with

var w,r,i,p,t,l,c,z,e,m,b,k,u,s,CPH,TOKEN;
var z = new Array();
var ROOT;

which define many global variables with short names. It's very bad style. It can follow to conflicts with other modules which you included. Typically it would be enough to define the most variables which you need inside of some function. You could move declaration of the most variables inside of $(document).ready(function(){/*.HERE.*/});.

If you really need to define some global variables you could define one which will be like the namespace and all other variables you could define as the properties of the only global object. It's the standard practice. In the way one can reduce the number of possible conflicts between different modules which you use. For example you could use something like

MYGLOBALCHATOBJECT = {
    root: "/",
    z: [],
};

...
// add new property
MYGLOBALCHATOBJECT.TOKEN = "some value";

You should confider to define many function inside of context of another functions. In the way you could reduce the need to define many global variables. Just an example The above code of inCart use n variable defined above of inCart function. The variable n will be used only inside of other global function flashCart defined directly after inCart. Moreover the function flashCart will be used only inside of callback success. So you can rewrite the code so, that you define both n and flashCart inside of callback success:

...
success: function (h) {
    // define LOCAL variable n
    var n = 0;
    // define LOCAL function which can use outer variable n
    function flashCart(){
        if(n<3) { 
            setTimeout("flashCart()",120);
            n=n+1;
        }
        $('#sideCartBox').toggleClass('highlighted');
    }

    $('#sideCartContents').replaceWith(h);
    mkButtons();
    jsEnhance();
    setLoader();
    if(!t) a.removeClass('loading').addClass('green').attr('href','Shop/Checkout.html').html('Checkout').parent().find('div.QTY').html('x'+q+' in cart');
    flashCart(); // we use LOCAL function
}

I would recommend you additionally to test your code in JSHint or JSLint.