facebook - Facebook の友達リストの取得

Question

Stackoverflow に投稿された他の同様の質問をグーグルで調べましたが、どれも機能していないようです。Web サイトで FB ログインを使用してログインし、友人リストを取得できるようにする必要があります。FB 開発者サイトのコードを使用しました。ログインはできますが、他に何も実行されません。特に、次の 2 つのことを理解したいと思います。

このコードを変更して、ログイン後にログインをログアウトボタンに変更するにはどうすればよいですか?
testAPI() 関数を実行するにはどうすればよいですか?

これが私のコード全体です。ログインは機能しますが、JS コンソールに出力が表示されません。

<html>   
<title> Test Title</title>    
<body>
<h1> About Test Title </h1>     
<p>Random text.</p>
<div id="fb-root"></div>
<script>
   window.fbAsyncInit = function() {
   FB.init({
      appId      : '345435435435', // valid App ID is used here
      channelUrl : '//www.my website.com/channel.html', // Channel File
      status     : true, // check login status
      cookie     : true, // enable cookies to allow the server to access the session
      xfbml      : true  // parse XFBML
   });

   // Here we subscribe to the auth.authResponseChange JavaScript event. This event is fired
   // for any authentication related change, such as login, logout or session refresh.               This means that
   // whenever someone who was previously logged out tries to log in again, the correct case below 
   // will be handled. 

   FB.Event.subscribe('auth.authResponseChange', function(response) {

   // Here we specify what we do with the response anytime this event occurs. 
   if (response.status === 'connected') {
     // The response object is returned with a status field that lets the app know the current
     // login status of the person. In this case, we're handling the situation where they 
     // have logged in to the app.

      console.log('Connected case… ');
      testAPI();
   } else if (response.status === 'not_authorized') {
     // In this case, the person is logged into Facebook, but not into the app, so we call
     // FB.login() to prompt them to do so. 
     // In real-life usage, you wouldn't want to immediately prompt someone to login 
     // like this, for two reasons:
     // (1) JavaScript created popup windows are blocked by most browsers unless they 
     // result from direct interaction from people using the app (such as a mouse click)
     // (2) it is a bad experience to be continually prompted to login upon page load.

     FB.login();
     console.log('Not authorized case… ');

   } else {
    // In this case, the person is not logged into Facebook, so we call the login() 
    // function to prompt them to do so. Note that at this stage there is no indication
    // of whether they are logged into the app. If they aren't then they'll see the Login
    // dialog right after they log in to Facebook. 
    // The same caveats as above apply to the FB.login() call here.

    FB.login();
    console.log('else case… ');
    }
  });
};

// Load the SDK asynchronously
(function(d){
var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
if (d.getElementById(id)) {return;}
js = d.createElement('script'); js.id = id; js.async = true;
js.src = "//connect.facebook.net/en_US/all.js";
ref.parentNode.insertBefore(js, ref);
}(document));

// Here we run a very simple test of the Graph API after login is successful. 
// This testAPI() function is only called in those cases. 

function testAPI() {
console.log('Welcome!  Fetching your information.... ');
  FB.api('/me', function(response) {
  console.log('Good to see you, ' + response.name + '.');
 });
}
</script>
<!--
Below we include the Login Button social plugin. This button uses the JavaScript SDK to
present a graphical Login button that triggers the FB.login() function when clicked.

Learn more about options for the login button plugin:
/docs/reference/plugins/login/ -->

<fb:login-button autologoutlink="true" show-faces="true" width="200" max-rows="1"></fb:login-button>
 </body>
 </html>

facebook - Facebook の友達リストの取得

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