Logoff

[eljeffeg]

The new Facebook App requirements specify that a logout method is necessary. Any chance of adding this to the facebook-sdk? Thanks

[martey]

@jeffg2k, how would you propose implementing logging out from the API in Python?

[eljeffeg]

I thought since the API had stuff for oauth, getting the access token, auth_url, that perhaps something could be added that logged off the user from that access token. Wasn't sure if it should go in here or what would need to be done. I've tried it in Javascript, but my app, based on the soccialcookbook just logs them right back in. So I thought that it probably needed to be done in the python code that is the backend, which uses facebook-sdk.

[martey]

Facebook's Graph API does not contain a method to invalidate access tokens, so there is no way for this SDK to "logout" a user (especially since the GraphAPI object does not store the state of users or the validity of its access token.

A quick look at socialcookbook suggests that the code does not use this SDK or Facebook's original code, and instead compiles Graph API requests directly. As a result, the issue you created at the socialcookbook repository is probably a better place to get answers.

More importantly, note that FB.logout will only work properly if you are also using the JavaScript SDK for login (e.g. if you use the get_user_from_cookie method). If you are using server-side OAuth authentication (e.g. with auth_url and get_access_token_from_code) - as socialcookbook seems to, how you logout will depend on your application's structure.

[eljeffeg]

Thanks for the thoughtful and detailed reply Martey, much appreciated. Sorry about the confusion, I must be using facebook-sdk for something else and got confused.