Facebooker talk - Aug 2008 - Bug when loading FBML through FB-Ajax

I ran across a bug a little while ago where link_to''s in generated
content
were not in the scope of the application callback url. This is because
facebook does not pass the "fb_sig_in_canvas" parameter for ajax
requests
(but it does pass fb_sig_is_ajax)

The following is the fix that I used:

diff --git a/lib/facebooker/rails/ facebook_url_rewriting.rb
b/lib/facebooker/rails/facebook_url_rewriting.rb
index 72807db..7dad529 100644
--- a/lib/facebooker/rails/facebook_url_rewriting.rb
+++ b/lib/facebooker/rails/facebook_url_rewriting.rb
@@ -13,7 +13,7 @@ module ::ActionController
     def link_to_canvas?(params, options)
       option_override = options[:canvas]
       return false if option_override == false # important to check for
false. nil should use default behavior
-      option_override || @request.parameters["fb_sig_in_canvas"] ==
"1" ||
@request.parameters[:fb_sig_in_canvas] == "1"
+      option_override || (@request.parameters["fb_sig_in_canvas"] ==
"1")
||  (@request.parameters[:fb_sig_in_canvas] == "1") ||
(@request.parameters[:fb_sig_is_ajax]=="1")
     end

     def rewrite_url_with_facebooker(*args)

Can anyone confirm that this looks like the right way to do it? It''d be
nice
to get this fixed in the official branch but I''m not sure if there
might be
something I overlooked.

Best,
George
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