我正在尝试通过 Facebook API 访问分数以获取我朋友的分数列表。当我尝试访问 /[facebook id]/scores 时，即使使用我的应用访问令牌，我也会收到以下错误：
FacebookApiException [ 0 ]：请求此资源需要用户访问令牌。 ~ APPPATH/classes/basefacebook.php [1039]
如何获取用户访问令牌？
更新：阅读http://developers.facebook.com/docs/reference/api/permissions/后，我已经确认应用访问令牌和用户访问令牌是两个不同的访问令牌。问题依然存在，如何获取用户访问令牌？
【问题讨论】：
标签： php facebook facebook-graph-api access-token facebook-access-token
在 Flex 中你可以使用：
FacebookDesktop.getSession().accessToken;
【讨论】：
订阅此活动：
FB.Event.subscribe('auth.authResponseChange', function(response) {
然后检查 response.status
【讨论】：
请参阅显示 Facebook 身份验证流程的文档。
http://developers.facebook.com/docs/authentication/
这是了解其工作原理的最佳起点。
不要将access_token误认为是您的应用密码，用于授权代表您注册的应用进行连接。
【讨论】：
我看到您正在使用 php-sdk。因此，您需要您的朋友使用类似example 的脚本访问您的应用程序：
<?php
/**
* Copyright 2011 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
require '../src/facebook.php';
// Create our Application instance (replace this with your appId and secret).
$facebook = new Facebook(array(
'appId' => '191149314281714',
'secret' => '73b67bf1c825fa47efae70a46c18906b',
));
// Get User ID
$user = $facebook->getUser();
// We may or may not have this data based on whether the user is logged in.
//
// If we have a $user id here, it means we know the user is logged into
// Facebook, but we don't know if the access token is valid. An access
// token is invalid if the user logged out of Facebook.
if ($user) {
try {
// Proceed knowing you have a logged in user who's authenticated.
$user_profile = $facebook->api('/me');
} catch (FacebookApiException $e) {
error_log($e);
$user = null;
}
}
// Login or logout url will be needed depending on current user state.
if ($user) {
$logoutUrl = $facebook->getLogoutUrl();
} else {
$loginUrl = $facebook->getLoginUrl(array('scope'=>'offline_access'));
}
// This call will always work since we are fetching public data.
$naitik = $facebook->api('/naitik');
?>
<!doctype html>
<html xmlns:fb="http://www.facebook.com/2008/fbml">
<head>
<title>php-sdk</title>
<style>
body {
font-family: 'Lucida Grande', Verdana, Arial, sans-serif;
}
h1 a {
text-decoration: none;
color: #3b5998;
}
h1 a:hover {
text-decoration: underline;
}
</style>
</head>
<body>
<h1>php-sdk</h1>
<?php if ($user): ?>
<a href="<?php echo $logoutUrl; ?>">Logout</a>
<?php else: ?>
<div>
Login using OAuth 2.0 handled by the PHP SDK:
<a href="<?php echo $loginUrl; ?>">Login with Facebook</a>
</div>
<?php endif ?>
<h3>PHP Session</h3>
<pre><?php print_r($_SESSION); ?></pre>
<?php if ($user): ?>
<h3>You</h3>
<img src="https://graph.facebook.com/<?php echo $user; ?>/picture">
<h3>Your User Object (/me)</h3>
<pre><?php print_r($user_profile); ?></pre>
<?php else: ?>
<strong><em>You are not Connected.</em></strong>
<?php endif ?>
<h3>Public profile of Naitik</h3>
<img src="https://graph.facebook.com/naitik/picture">
<?php echo $naitik['name']; ?>
</body>
</html>
那么你需要：
offline_access 权限access_token
$facebook->api('friend_id/scores?access_token=$stored_access_token');
【讨论】：
offline_access 添加到您的范围内，然后一旦您的朋友连接到您的应用（在if($user) 内），调用您提到的函数将返回您需要存储的access_token！
我调用这个函数：
FB.getLoginStatus(onFacebookInitialLoginStatus);
调用下面的函数并从响应中获取accesss_token。
function onFacebookInitialLoginStatus(response) {
if (response.status == "connected" && response.session) {
var access_token = response.session.access_token;
var url = 'https://graph.facebook.com/me/likes?access_token=' + access_token;
}
else {
facebookLogin();
}
}
【讨论】：
onFacebookInitialLoginStatus 未定义