Facebook + 仅提示发布流

Question

如果我有一个用户已经登录到 facebook，但从他/她的帐户中删除了我的应用程序，我如何才能在用户已经登录后再次进入我的应用程序时才提示发布_stream？

谢谢。

    FB.getLoginStatus(function (response) {
            if (response.status === 'connected') {
                // the user is logged in and has authenticated your
                // app, and response.authResponse supplies
                // the user's ID, a valid access token, a signed
                // request, and the time the access token 
                // and signed request each expire
                uid = response.authResponse.userID;
                accesstoken = response.authResponse.accessToken;
                SrReferral = '@ViewBag.Referral';
                window.fbuserid = uid;
                var postData = { facebookUID: uid, facebookAccessTok: accesstoken, facebookSrReferral: SrReferral };
                $.ajax({
                    url: '@Url.Action("DisplayGolfers")',
                    type: 'POST',
                    data: postData,
                    dataType: 'html',
                    success: function (responseText) {
                        $("#container").html(responseText);
                    }
                });
            } else if (response.status === 'not_authorized') {
                // the user is logged in to Facebook, 
                // but has not authenticated your app 
            } else {
                // the user isn't logged in to Facebook.
                window.FB.login(function (response) {
                    if (response.authResponse) {
                        uid = response.authResponse.userID;
                        accesstoken = response.authResponse.accessToken;
                        SrReferral = '@ViewBag.Referral';
                        window.fbuserid = uid;
                        var postData = { facebookUID: uid, facebookAccessTok: accesstoken, facebookSrReferral: SrReferral };
                        $.ajax({
                            url: '@Url.Action("DisplayGolfers")',
                            type: 'POST',
                            data: postData,
                            dataType: 'html',
                            success: function (responseText) {
                                $("#container").html(responseText);
                            }
                        });
                    } else {
                        console.log('User cancelled login or did not fully authorize.');
                        alert('User cancelled login');
                    }
                }, { scope: 'publish_stream' });
            };
        });
    }  

Answer 1

似乎我误解了您的问题，您希望用户保持登录状态，即使他从 Facebook 帐户中删除了应用程序。这真的很糟糕，很容易成为安全问题。

一旦用户删除了您的应用程序，他就不应再登录了！

如果您不想在用户下次访问您的应用程序之前提示用户权限，您应该定义您的情况下的“下一次”（小时/天/浏览器会话/等）并设置一些 cookie/会话来检查每次访问是否是正确的提示时间。

---

您可以使用FB.getLoginStatus 的第二个参数来始终获取用户的最新状态（对于删除您的应用的用户，这不会返回connected）。

FB.getLoginStatus(function(response) {
  // this will be called when the roundtrip to Facebook has completed
}, true);

参见FB.getLoginStatus documentation的“往返 Facebook 服务器”部分