Rails - Jan 2014 - submit form with file upload + cross domain

I am trying to submit a form in rails 4 with File upload(using paperclip) 
to an *another domain* using Ajax with dataType 'jsonp' ( I tried both
ajax
and ajaxForm ).

// .js
$(".form").ajaxSubmit({
      type: $(".form").attr("method"),
      dataType: "jsonp",
      url: $(".form").attr("action"),
      data: $(".form").serialize(),
      success: function(data) {
        console.log('respone');
        console.log(data);
      }
    }); 


I am getting the following error message.

*Can't verify CSRF token authenticity*
*Completed 422 Unprocessable Entity in 26ms*

*ActionController::InvalidAuthenticityToken 
(ActionController::InvalidAuthenticityToken):*

I can save data when i am not attach any file. 

I got one solution, 

skip_before_filter :verify_authenticity_token  

I can save data by skipping verify authentication token. But I think this 
is not a secure way.

Can any one know a secure way? any suggestion please!

Note: I am getting all the params values in the destination domain.

-- 
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To view this discussion on the web visit
https://groups.google.com/d/msgid/rubyonrails-talk/f448292b-aa47-4412-9ecf-19de71947764%40googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.