Invalid Token in Joomla Survey

Question

im having some issues regarding to a survey module on this website:

www.madridactual.es -> You can find the survey at the middle right of the home page.

The problem is that sometimes when you vote you may get an Invalid Token. I have the cache desactivated and still get these issues.

What could be the problem?

Thank in advances for your help!

Answer 1

Sometimes the form doesn't work means there can only be two causes.

1) session expiring, which is very unlikely since it takes 15 minutes before it expires. Also I don't think you need sessions to pass the token back and forth (it's a hidden field).

2) the cache. You say you have cache disabled (I assume in the global configuration-system tab); did you disable the cache plugin as well?

If this is the case (disabling the cache plugin works) then most likely your survey component is not injecting the Token properly: Joomla cache takes care of updating tokens for us! But if the token is rewritten or inserted in a get call (or an ajax form) it will not be updated. That is a design issue and it's the responbility of the extension developer. It can be easily addressed leaving the token in its standard <input and handling it with javascript on the client side to inject its name/value into the ajax call.