When I submit a form using method "POST" and full canvas callback Url action inside Facebook iframe canvas, I cannot get the form elements in the request.
Can anyone give me some help on this?
page code:
<form action="http://apps.facebook.com/myapp" method="post" target="_top">
<input type="hidden" name="myvar" value="v" />
<input type="submit" />
</form>
Specify the page name in your action eg:
http://apps.facebook.com/myapp/yourpage.php
If i understood your question i think that you are in an IFRAME... so why use a facebook url for the action?
simply put in the action parameter the url of your web application (not the facebook url, but the url of the canvas) something like http://www.yourhost.it/your_fb_app/process.php/aspx
hope this help (and hope to have understood your problem)