Question

我正在为我们网站上的facebook连接创建登录代码，但是我找不到如何检查用户是否具有所需的权限。

使用旧的javascript，将为每个权限打开一个对话框，返回代码会说明是否接受了权限，如何使用javascript代码？

这是我到目前为止所获得的代码，在TODO中我想检查用户是否有权限

   <div id="fb-root"></div>
   <script>
   window.fbAsyncInit = function() {
    FB.init({appId: 'MY API KEY', status: true, cookie: true,xfbml: true});
    FB.Event.subscribe('auth.login', function(response) {
        alert("logged in");

        //TODO: check if all perms has been accepted!!!!
        //if they have NOT been accepted, I want to logout the user
    });

    FB.getLoginStatus(function(response) {

         if (response.session) {    
            // logged in and connected user, again, check if all perms has been accepted
            alert("already logged in");    
         }

     });


  };
  (function() {
    var e = document.createElement('script'); e.async = true;
    e.src = document.location.protocol +
      '//connect.facebook.net/en_US/all.js';
    document.getElementById('fb-root').appendChild(e);
  }());
</script>
<fb:login-button perms="email,user_birthday,status_update,publish_stream" >Login with Facebook</fb:login-button>

顺便说一句，在他们有这个例子的文档中 http://developers.facebook.com/docs/reference/javascript/FB.login

他们使用自定义按钮，这就是为什么我怀疑fb会有类似的东西：loginbutton

Answer 1

FB.Event.subscribe('auth.login',function(response) {
   if(response.session) { //checks if session is true
      alert('logged in');

      if(response.perms) { //checks if perms is true = permissions are granted
         alert('perms granted');
      }
      else { //if perms is false = no permissions granted
         alert('no perms');
      }
   }
   else { //if something goes wrong
      alert('login failure');
   }
});

原创Facebook指南： http://developers.facebook.com/docs/reference/javascript/FB.login

Answer 2

我做了这个解决方案来检查“user_friends”和“publish_actions”权限，如果不允许这两者，则强制用户“重新进行autenticate”。只有在给出所有权限时才会调用回调函数。

function login(cb,forceAuth) {
    FB.getLoginStatus(function (response) {
        if (response.status !== 'connected' || forceAuth==true){
            FB.login(function (response) {
                checkPermissions(cb,false);
            }, {scope: 'publish_actions,user_friends'});
        } else {
            checkPermissions(cb);
        }
    });
}

function checkPermissions(cb,forceAuth){
    FB.api(
        "/me/permissions",
        function (response) {
            if (response.data[0]['publish_actions']==undefined || response.data[0]['publish_actions']==0 ||
                response.data[0]['user_friends']==undefined || response.data[0]['user_friends']==0) {
                if (forceAuth!=false)
                    login(cb,true);
            } else {
                cb();
            }
        }
    );
}

使用方法：

login(function () {
    myLogedAndAllowedFunction();
});

facebook connect：检查用户是否拥有javascript权限

2 个答案: