Unable to extend facebook access token

I am trying to extend my facebook access token, and following is what I did. However, i wasn't able to get the token extended, and when I check the facebook accesstoken debugger it still shows that the token is expiring in an hour.

any ideas?

    private string appId = "my app id";
    private string appSecret = "my app secret";
    private string returnUrl = "http://localhost:1868/callback";
    private string _scope = "user_about_me,publish_stream,user_videos,user_photos";

    [Test]
    public void GetFacebookLoginUrl()
    {
        var fb = new FacebookClient();
        dynamic result = fb.GetLoginUrl(
            new
                {
                    client_id = appId,
                    client_secret = appSecret,
                    redirect_uri = returnUrl,
                    response_type = "code",
                    scope = _scope
                }
            );
    }

    [Test]
    public void exchangeCodeForAccessToken()
    {
        var fb = new FacebookClient();
        dynamic result = fb.Get("oauth/access_token", new
        {
            client_id = appId,
            client_secret = appSecret,
            redirect_uri = returnUrl,
            code = "got the code after user accepts the request"
        });
    }


    [Test]
    public void ExtendExpiryTimeOfAccessToken()
    {
        var fb = new FacebookClient();
        dynamic result = fb.Get("oauth/access_token", new
        {
            client_id = appId,
            client_secret = appSecret,
            grant_type = "fb_exchange_token",
            fb_exchange_token = "token from preview method"
        });
    }

Solution

after de-authorize the app from the users' accounts everything start making sense. One thing to note tho, the code above actually gets a "long lived" access token back which is valid for 60 days and it can not be extended.

if a Facebook client-side authentication is used, then one can extend it using the "ExtendExpiryTimeOfAccessToken" sample.

---

If you initially started developing the application and signing in months ago before the offline access depreciation it is possible your affected by this bug.

https://developers.facebook.com/bugs/341793929223330

If you are affected you need to de-authorise the application and then try again, this doesn't affect new users.

链接地址: http://www.djcxy.com/p/61614.html

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