JavaScript [removed] does not set referer in the request header

Question

I understand relying on Referer in the request header is not right. But my question is, why IE does not set Referer to the Request Header if I use window.location

Answer 1

Yeap, yours works as well, but ended up doing:

<a href="#" id="linkOne">Link 1</a>

<script type="text/javascript">
   document.getElementById("linkOne").href = "https://" + serverURL + "/path/folder/page.aspx";
</script>

Answer 2

Setting window.location is not the same as following a link on that page. It starts a new request for the page as thought the user typed the URL into the browser's address bar.

I did manage to locate a workaround:

function goTo(url)
{
    var a = document.createElement("a");
    if(!a.click) //for IE
    {
         window.location = url;
         return;
    }
    a.setAttribute("href", url);
    a.style.display = "none";
    document.body.appendChild(a);
    a.click();
}

It creates a link on the page and simulates a click. The result is a change in window.location and the referrer is populated.

http://ianso.blogspot.com/2006/01/referer-header-not-set-on-http.html

Answer 3

Is it possible to trigger a link's (or any element's) click event through JavaScript? uses a createEvent/dispatchEvent or createEventObject/fireEvent solution.

Answer 4

Your post title shows that you want to change the current page programmatically using JavaScript but still having the HTTP referrer provided (from what I understood, using a <a> tag is just for a test case).

You need to be aware of cross-browser issues:

• The HTTP referrer header (HTTP-Referer) is set when changing window.location.href under the following browsers:
  • MSIE 9 (but probably any version above 9)
  • Firefox (at least 3.0, 3.5, 4.0, 5.0, but most probably all versions)
  • Chrome (at least 9, but most probably all versions)
  • Safari (at least 5, but most probably all versions)
  • Opera (at least 11, but most probably all versions)
• MSIE (at least 6, 7, 8): the referrer is not set when changing window.location.href (this is why some pseudo-solutions are based on myLink.click())
• Firefox (at least 3.0, 3.5, 4.0): the click function does not exist (this is why pseudo-solutions based on myLink.click() do not work)
• Firefox 5 : the click function exists under Firefox 5 but does not change the window location, so all the methods relying on the existence of the myLink.click() method will not work. Calling myLink.onclick() or myLink.onClick() raise an error ("onclick is not a function"), so solutions based on these calls will not work.

In order to manage these cross-browser issues, I'm using the following method:

function navigateToUrl(url) {
    var f = document.createElement("FORM");
    f.action = url;

    var indexQM = url.indexOf("?");
    if (indexQM>=0) {
        // the URL has parameters => convert them to hidden form inputs
        var params = url.substring(indexQM+1).split("&");
        for (var i=0; i<params.length; i++) {
            var keyValuePair = params[i].split("=");
            var input = document.createElement("INPUT");
            input.type="hidden";
            input.name  = keyValuePair[0];
            input.value = keyValuePair[1];
            f.appendChild(input);
        }
    }

    document.body.appendChild(f);
    f.submit();
}

navigateToUrl("http://foo.com/bar");

This solution works on all the browser flavors and version listed above. It has the advantage to be simple, multi-browser and easy to understand. Note that this has not been tested under HTTPS.

Answer 5

I don't have enough points to comment on Evan's answer to suggest a correction so all I can do is post the correction here. In short, document.createElement(a) is missing quotes and should be document.createElement("a") instead. This should fix Kevin's concern about FF5 as well.

The whole function as I wrote it:

function goTo(url)
{
    var a = document.createElement("a");
    if (a.click)
    {
        // HTML5 browsers and IE support click() on <a>, early FF does not.
        a.setAttribute("href", url);
        a.style.display = "none";
        document.body.appendChild(a);
        a.click();
    } else {
        // Early FF can, however, use this usual method
        // where IE cannot with secure links.
        window.location = url;
    }
}

This works in our HTTPS environment with IE7, IE8, FF3, FF7, and Chrome. So I imagine it works in FF5 as well. Without this workaround we get 403 errors in IE7 and IE8 when trying to set window.location. Regarding Sha Le's question as to why IE does this, I can only guess is that they believe it to be too insecure. I had a similar problem with window.open in IE that I had to work around as well.