OAuthException : An active access token must be used to query information about the current user - facebook

Question

I'm trying to run the sample code for Facebook connect that I downloaded from http://thinkdiff.net/facebook/php-sdk-3-0-graph-api-base-facebook-connect-tutorial/
I get this error message :
[error] => Array
(
[message] => An active access token must be used to query information about the current user.
[type] => OAuthException
[code] => 2500
)
You can try on my website : http://facebook.oliverjordan.net/thinkdiff
Here is the fbmain.php code :
<?php
//facebook application
$fbconfig['appid' ] = "463007877113xxx";
$fbconfig['secret'] = "-sensor-";
$fbconfig['baseurl'] = "http://facebook.oliverjordan.net/thinkdiff/index.php"; //"http://thinkdiff.net/demo/newfbconnect1/php/sdk3/index.php";
//
if (isset($_GET['request_ids'])){
//user comes from invitation
//track them if you need
}
$user = null; //facebook user uid
try{
include_once "facebook.php";
}
catch(Exception $o){
error_log($o);
}
// Create our Application instance.
$facebook = new Facebook(array(
'appId' => $fbconfig['appid'],
'secret' => $fbconfig['secret'],
'cookie' => true,
));
//Facebook Authentication part
$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.
$loginUrl = $facebook->getLoginUrl(
array(
'scope' => 'email,offline_access,publish_stream,user_birthday,user_location,user_work_history,user_about_me,user_hometown',
'redirect_uri' => $fbconfig['baseurl']
)
);
$logoutUrl = $facebook->getLogoutUrl();
if ($user) {
try {
// Proceed knowing you have a logged in user who's authenticated.
$user_profile = $facebook->api('/me');
} catch (FacebookApiException $e) {
//you should use error_log($e); instead of printing the info on browser
d($e); // d is a debug function defined at the end of this file
$user = null;
}
}
//if user is logged in and session is valid.
if ($user){
//get user basic description
$userInfo = $facebook->api("/$user");
//Retriving movies those are user like using graph api
try{
$movies = $facebook->api("/$user/movies");
}
catch(Exception $o){
d($o);
}
//update user's status using graph api
//http://developers.facebook.com/docs/reference/dialogs/feed/
if (isset($_GET['publish'])){
try {
$publishStream = $facebook->api("/$user/feed", 'post', array(
'message' => "I love thinkdiff.net for facebook app development tutorials. :)",
'link' => 'http://ithinkdiff.net',
'picture' => 'http://thinkdiff.net/ithinkdiff.png',
'name' => 'iOS Apps & Games',
'description'=> 'Checkout iOS apps and games from iThinkdiff.net. I found some of them are just awesome!'
)
);
//as $_GET['publish'] is set so remove it by redirecting user to the base url
} catch (FacebookApiException $e) {
d($e);
}
$redirectUrl = $fbconfig['baseurl'] . '/index.php?success=1';
header("Location: $redirectUrl");
}
//update user's status using graph api
//http://developers.facebook.com/docs/reference/dialogs/feed/
if (isset($_POST['tt'])){
try {
$statusUpdate = $facebook->api("/$user/feed", 'post', array('message'=> $_POST['tt']));
} catch (FacebookApiException $e) {
d($e);
}
}
//fql query example using legacy method call and passing parameter
try{
$fql = "select name, hometown_location, sex, pic_square from user where uid=" . $user;
$param = array(
'method' => 'fql.query',
'query' => $fql,
'callback' => ''
);
$fqlResult = $facebook->api($param);
}
catch(Exception $o){
d($o);
}
}
function d($d){
echo '<pre>';
print_r($d);
echo '</pre>';
}?>
Can anyone help me?

Answer 1

You must ensure that your access token is active. Or maybe you're in logout condition. Or try to clean the cookies and cache from your browser (ctrl+shift+del)

Answer 2

Please check if you are getting any Facebook exceptions like
An active access token must be used to query information about the
current user.
which causes 0 as user id in return from $facebook->getUser().
So please check with getAccessTokenFromCode() from base_facebook.php and verify access_token_response format as it may be in JSON format.
So try to use appropriate decoding method to get $response_params['access_token'] from $access_token_response.