[Facebooker-talk] Session key invalid or no longer valid

[kevin lochner]

it's only going to catch the exception in your controller, so make  
sure you
load any needed data from facebook in the controller (rather than  
leaving
it to the view - e.g., <%= facebook_session.user.name %>

On Feb 1, 2009, at 4:26 PM, Adeel Ahmad wrote:

> Thanks, this looks like it should do well for now. However it's not  
> catching the exception... must be some other config I have wrong. Odd.
>
> module Facebooker
>   module Rails
>     module Controller
>       include Facebooker::Rails::ProfilePublisherExtensions
>       def self.included(controller)
>         controller.extend(ClassMethods)
>         controller.before_filter :set_adapter
>         controller.before_filter :set_fbml_format
>         controller.helper_attr :facebook_session_parameters
>         controller.helper_method :request_comes_from_facebook?
>         controller.rescue_from  
> Facebooker::Session::SessionExpired, :with  
> => :facebook_session_expired
>       end
>
>       def facebook_session_expired
>           clear_fb_cookies!
>           clear_facebook_session_information
>           flash[:error] = "Your facebook session has expired."
>           redirect_to root_url
>       end
>
> - Adeel
>
>
>
>
> On Sun, Feb 1, 2009 at 11:09 AM, kevin lochner <klochner at gmail.com>  
> wrote:
> I'm using a rescue.  I tried advancing this discussion a couple  
> weeks ago - the problem is that to really *know* that the session is  
> valid, you have to try using it (i.e., hit the facebook rest server  
> with a request).  I think it's a waste to
> constantly ping the facebook server just to make sure you don't get  
> an invalid session error when you're not expecting it, especially  
> given that this scenario will be low-frequency with respect to total  
> requests.
>
> So here's what I did in facebooker/rails/controller.rb:
>
> module Facebooker
>   module Rails
>     module Controller
>       def self.included(controller)
>         controller.rescue_from  
> Facebooker::Session::SessionExpired, :with  
> => :facebook_session_expired
>       end
>
>       def facebook_session_expired
>           clear_fb_cookies!
>           clear_facebook_session_information
>           flash[:error] = "Your facebook session has expired."
>           redirect_to root_url
>         end
>
> I'm hesitant to add this to facebooker because i'm not convinced  
> everyone will want to do it this way, and
> it probably means adding another parameter like  
> "expired_session_url" so that this exception handling
> works out of the box (since not everyone will redirect to root_url).
>
>  - kevin
>
>
> On Feb 1, 2009, at 12:51 PM, Adeel Ahmad wrote:
>
>> This may be related to Aaron's question on Jan. 30. However in my  
>> case I doing Facebook Connect using Facebooker for my site.
>> Following the Facebook Connect tutorial it does create a session  
>> and show the user as logged in. For now I have the same 'fb'  
>> controller just to demo log in.
>> However if the user logs out at facebook.com and then refreshes fb/ 
>> index on my site, I get "Session key invalid or no longer valid" on  
>> the line that outputs @facebook_session.user.name. Just FYI if I  
>> output @facebook_session.user.to_s it does give me the uid.
>> If you look at the stack trace below you'll notice that it passes  
>> through a number of actions that test for existence and validity of  
>> the session. It has a problem in the Error class of parser.rb. I  
>> would think it should catch the problem a lot earlier than in  
>> parser.rb.
>> Any thoughts on how to troubleshoot and/or workaround this? I'm on  
>> Rails 2.1.1.
>>
>> ========================================
>>  Facebooker::Session::SessionExpired in Fb#index
>>
>> Showing fb/index.html.erb where line #10 raised:
>>
>> Session key invalid or no longer valid
>>
>> Extracted source (around line #10):
>>
>> 7: <%= fb_login_button%>
>> 8:
>> 9: <% if facebook_session %>
>> 10:   <h2>You are logged in as <%= facebook_session.user.name %></h2>
>> 11: <% else %>
>> 12:   <h2>You are not logged in!</h2>
>> 13: <% end %>
>>
>> vendor/plugins/facebooker/lib/facebooker/parser.rb:487:in `process'
>> vendor/plugins/facebooker/lib/facebooker/parser.rb:15:in `parse'
>> vendor/plugins/facebooker/lib/facebooker/service.rb:20:in `post'
>> vendor/plugins/facebooker/lib/facebooker/session.rb:473:in  
>> `post_without_logging'
>> vendor/plugins/facebooker/lib/facebooker/session.rb:484:in `post'
>> vendor/plugins/facebooker/lib/facebooker/logging.rb:27:in  
>> `log_fb_api'
>> vendor/rails/activesupport/lib/active_support/core_ext/benchmark.rb: 
>> 8:in `realtime'
>> vendor/plugins/facebooker/lib/facebooker/logging.rb:27:in  
>> `log_fb_api'
>> vendor/plugins/facebooker/lib/facebooker/session.rb:483:in `post'
>> vendor/plugins/facebooker/lib/facebooker/models/user.rb:120:in  
>> `populate'
>> vendor/plugins/facebooker/lib/facebooker/model.rb:35:in `name'
>> app/views/fb/index.html.erb:10:in  
>> `_run_erb_47app47views47fb47index46html46erb'
>>
>>
>> -- 
>> - Adeel
>>
>>
>>
>> _______________________________________________
>> Facebooker-talk mailing list
>> Facebooker-talk at rubyforge.org
>> http://rubyforge.org/mailman/listinfo/facebooker-talk
>
>

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