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Editorial Team
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Asked: 2026-06-03T21:55:33+00:00

I am using the Facebook API in a C++ application with libcurl . Logging

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I am using the Facebook API in a C++ application with libcurl.
Logging in works good, I can retrieve some user information after the user has registered my application.
The problem is, when I want to log the user out via

https://www.facebook.com/logout.php?access_token=RETRIEVED_TOKEN&confirm=1&next=http://www.google.com ,
there are still remaining active sessions in my account settings (security).

I don’t want these sessions to remain as the logout should clean these.
How can I smoothly clean those active sessions when logging out?
Do I have to add the APP_ID to the URL?

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1 Answer

  1. Editorial Team

    I found out what was missing in my code: The lib that was encapsulating libcurl to perform requests on facebook wasn’t cleaning up properly.

    So the fix was to do curl_easy_cleanup() on my curl handle in the destructor of my session object. Now there are no active sessions on facebook anymore.

    While debugging, I found another error in my code concerning curl: If you want to do curl_easy_getinfo(handle, CURLINFO_EFFECTIVE_URL, buf) you MAY NOT delete after the function call as curl holds the buffer.
    Furthermore, I don’t have any memory leaks.
    Thanks for your help!

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