Safari 3rd party cookie iframe trick no longer wor

Question

So this is the umteenth revenge of the "how do I get 3rd party cookies to work in Safari" question but I'm asking again because I think the playing field has changed, perhaps after February 2012. One of the standard tricks to get 3rd party cookies in Safari was as follows: use some javascript to POST to a hidden iframe. It (used to) trick Safari into thinking that the user had interacted with the 3rd party content and so then allow cookies to be set.

I think this loophole has been closed in the wake of the mild scandal where it was revealed that Google was using that trick with its ads. At the very least, while using this trick I have been completely unable to set cookies in Safari. I unearthed some random internet postings that claimed that Apple was working on closing the loophole but I haven't found any official word.

As a fallback I even tried redesigning the main third party frame so that you had to click on a button before the content would load but even that level of direct interaction was not enough to melt Safari's cold cold heart.

So does anyone know for certain if Safari has indeed closed this loophole? If so, are there other workarounds (other than manually including a session ID in every request)?

Answer 1

Let me share my fix in ASP.NET MVC 4. The main idea like in correct answer for PHP. The next code added in main Layout in header near scripts section:

@if (Request.Browser.Browser=="Safari")
{
    string pageUrl = Request.Url.GetLeftPart(UriPartial.Path);
    if (Request.Params["safarifix"] != null && Request.Params["safarifix"] == "doSafariFix")
    {
        Session["IsActiveSession"] = true;
        Response.Redirect(pageUrl);
        Response.End();
    }
        else if(Session["IsActiveSession"]==null)
    {
        <script>top.window.location = "?safarifix=doSafariFix";</script>
    }
}