我正在尝试让 Facebook 用户(当前用户)使用以下代码:
$app_id = "xxx";
$app_secret = "yyy";
//** Get user information
//Create our application instance.
$facebook = new Facebook(array(
'appId' => $app_id,
'secret' => $app_secret,
));
// 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');....
// The $user_profile = $facebook->api('/me'); line throw an exception:
'message' => string 'An active access token must be used to query
'information about the current user.' (length=80)
'type' => string 'OAuthException' (length=14)
'code' => int 2500
为什么？
最佳答案
看来您没有通过OAuth 2.0 身份验证/授权过程，如 Authentication 中所述。
那里有一些例子解释了如何做到这一点。我也在使用 PHP SDK，但我选择在客户端通过 JavaScript 进行身份验证，这对我来说更容易。不过，这两种方法都在文档中进行了解释。
更新:我使用的代码是 PHP 和 JavaScript 的组合，这对我来说非常有用。此处唯一未正确处理的情况 (AFAIK) 是当用户未登录 Facebook 时访问应用程序，即，他直接通过 URL 而不是通过 Facebook 访问应用程序。在这种情况下，会显示空白页面，而不是通知和登录按钮或其他内容。
无论如何，这是我的 index.php，其中我从我的 config.inc.php 传递变量，例如成功(应用程序主页)和失败页面(用户没有向 JavaScript 授予权限:
<?php
require 'include/config.inc.php';
//Check whether Facebook OAuth mechanism called back to this script with access_token or error
if (isset($_GET['expires_in']) && $_GET['expires_in']>0)
{
header('Location: '.$appname_canvasPage.$appname_successPage);
exit;
}
else if (isset($_GET['error']))
{
//echo 'querystr: '.$_SERVER['QUERY_STRING'];
header('Location: '.$appname_canvasPage.$appname_failurePage);
exit;
}
else
{
require 'include/header_metadata.inc.html';
?>
</head>
<body>
<div id="fb-root"></div>
<script>
var appname_canvasURI = '<?php echo $appname_canvasURI; ?>';
var appname_canvasPage = '<?php echo $appname_canvasPage; ?>';
var appname_successPage = '<?php echo $appname_successPage; ?>';
var appname_failurePage = '<?php echo $appname_failurePage; ?>';
var appname_fbPerms = '<?php echo $appname_fbPerms; ?>';
var appname_appid= '<?php echo $appname_appid; ?>';
window.fbAsyncInit = function()
{
FB.init({
appId : appname_appid, // App ID
channelUrl : appname_canvasPage+'/channel.html', // Channel File
status : true, // check login status
cookie : true, // enable cookies to allow the server to access the session
oauth : true, // enable OAuth 2.0
xfbml : true // parse XFBML
});
// Additional initialization code here
FB.getLoginStatus(function(response)
{
//console.log('getLoginStatus response: ',response);
if (response.authResponse)
{
//user is already logged in and connected
facebookCheckPerms(); // ensure all requires perms are available and if not request them
}
else
{
//app is not authorized or user is logged out
facebookOAuthRedirect();
}
});
};
// Load the SDK Asynchronously
(function()
{
var e = document.createElement('script');
e.type = 'text/javascript';
e.src = document.location.protocol + '//connect.facebook.net/en_US/all.js';
//e.src = "http://static.ak.fbcdn.net/connect/en_US/core.debug.js";
e.async = true;
document.getElementById('fb-root').appendChild(e);
}());
function facebookCheckPerms()
{
var hasReqPerms=true;
FB.api(
{
method: 'fql.query',
query: 'SELECT '+appname_fbPerms+' FROM permissions WHERE uid=me()'
},
function(response)
{
for(var key in response[0])
{
if(response[0][key]==0)
{
hasReqPerms=false;
}
}
if (hasReqPerms==false)
{
// user does not have required permissions, do OAuth 2.0 redirect to get permissions
facebookOAuthRedirect();
}
else
{
// user has required permissions, start the app.
//console.log('checkperms: user has required permissions, start the app');
top.location.href = appname_canvasPage+appname_successPage;
}
});
}
function facebookOAuthRedirect()
{
var redirectURL = 'https://www.facebook.com/dialog/oauth/?client_id='+appname_appid+'&scope='+appname_fbPerms+'&redirect_uri='+encodeURIComponent(appname_canvasURI)+'&response_type=token';
//console.log('redirectURL: '+redirectURL);
top.location.href = redirectURL;
}
</script>
<?php
}
?>
</body>
</html>
关于facebook - 必须使用有效的访问 token ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/9470389/