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

user401183 picture user401183 · May 17, 2011 · Viewed 167.7k times · Source

I've been struggling to find out what is happening with this. My scripts were working fine for a bit and suddenly half stopped.

I'm accessing the api and am getting back an access token. With the access token, I can access a users public info just fine. However, when I try to post info to their FB account I get this error.

Fatal error: Uncaught OAuthException: An active access token must be used to query information about the current user. 

Any idea what is happening here? I'm also using sessions on my site to keep track of internal user ids. Not sure if my sessions could be causing a problem.

This is my upload script where I'm getting an error.

require 'facebook/src/facebook.php';


// Create our Application instance (replace this with your appId and secret).
$facebook = new Facebook(array(
  'appId'  => '12345678',
  'secret' => 'REMOVED',
  'fileUpload' => true, 
  'cookie' => true,
));
$facebook->setFileUploadSupport(true); 

$me = null;
// Session based API call.
if ($session) {
  try {
    $uid = $facebook->getUser();
    $me = $facebook->api('/me');
  } catch (FacebookApiException $e) {
    error_log($e);
  }
}


// login or logout url will be needed depending on current user state.
if ($me) {
  $logoutUrl = $facebook->getLogoutUrl();
} else {
  $loginUrl = $facebook->getLoginUrl();
}


$photo_details = array('message' => 'my place');
$file='photos/my.jpg'; //Example image file
$photo_details['image'] = '@' . realpath($file);
$upload_photo = $facebook->api('/me/photos', 'post', $photo_details);

Answer

ifaour picture ifaour · May 17, 2011

Just check for the current Facebook user id $user and if it returned null then you need to reauthorize the user (or use the custom $_SESSION user id value - not recommended)

require 'facebook/src/facebook.php';


// Create our Application instance (replace this with your appId and secret).
$facebook = new Facebook(array(
  'appId'  => 'APP_ID',
  'secret' => 'APP_SECRET',
));

$user = $facebook->getUser();

$photo_details = array('message' => 'my place');
$file='photos/my.jpg'; //Example image file
$photo_details['image'] = '@' . realpath($file);

if ($user) {
  try {
    // We have a valid FB session, so we can use 'me'
    $upload_photo = $facebook->api('/me/photos', 'post', $photo_details);
  } catch (FacebookApiException $e) {
    error_log($e);
  }
}


// login or logout url will be needed depending on current user state.
if ($user) {
  $logoutUrl = $facebook->getLogoutUrl();
} else {
// redirect to Facebook login to get a fresh user access_token
  $loginUrl = $facebook->getLoginUrl();
  header('Location: ' . $loginUrl);
}

I've written a tutorial on how to upload a picture to the user's wall.