Facebook Iframe App with multiple pages in Safari Session Variables not persisting

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I believe this solution has become obsolete with the latest (6.0 and later) versions of Safari.

Safari by default does not allow cookies to be set from third parties. This affects Facebook iframe applications because the user is accessing a page served from apps.facebook.com but the iframe is being served from yourdomain.com, the “third party” in this case.

There are several several solutions mentioned around the web. The best I’ve found and one recommended by Facebook in its list of miscellaneous issues is to fake a POST request to yourdomain.com using JQuery. This solution detailed by Anant Garg works in general for different host/iframe domains and needs to be adapted for Facebook apps. The key parts are:

$("body").append('
 <iframe id="sessionframe" name="sessionframe" onload="submitSessionForm()" src="http://www.yourdomain.com/blank.php" style="display:none;"></iframe>
 <form id="sessionform" enctype="application/x-www-form-urlencoded" 
   action="http://www.yourdomain.com/startsession.php"
   target="sessionframe" method="post"></form>');
var firstTimeSession = 0;
function submitSessionForm() {
  if (firstTimeSession == 0) {
    firstTimeSession = 1;
    $("#sessionform").submit();
  }
}

Another solution by Will Henderson is to instrument each link on your page with session information using a Javascript function. Then modify your server code to capture this session information by reading it from GET parameters.

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