Trouble with PHP SDK 3 and access token_问答_开发者

开发者 https://www.devze.com 2023-04-12 15:19 出处：网络

I\'ve developed a set of pages to get permission and authenticate the user with the new PHP SDK, but even if I\'ve read many posts and suggestions and solutions, I can\'t figure how to solve my troubl

I've developed a set of pages to get permission and authenticate the user with the new PHP SDK, but even if I've read many posts and suggestions and solutions, I can't figure how to solve my trouble.

Generally I have two or more php scripts. The first one, index.php, is the one in which authorization are asked and where i get login url using sdk.

The other pages generally include a file in which I initialize facebook SDK and use some methods (like facebook->api("/me"))

Everything works fine in 90% of use, but sometimes I get errors like "An active access token must be used" (usually when i log out from facebook and then i log in trying to access the application with a different user on the same browser; however this situation is not always reproducible, even if i tried changing my user password - I know that change password is one of the way to invalidate a token).

I'll show you my code in the next lines.

Every help will be appreciated, thank you very much.

CONFIG.PHP

 define('FB_APP_ID', 'my app id');
 define('FB_SECRET', 'my secret');
 define('FB_SCOPE', 'my scope');
 define('FB_REDIRECT_URI','http://<my_base_url>/index.php');
 define('FB_APP_URL','http://apps.facebook.com/<my_app_name>');
 define('FB_REDIRECT_PAGE','page.php');

INDEX.PHP

<?php
  include('config.php');
  require 'libs/facebook.php';
  $facebook = new Facebook(array(
           'appId'  => FB_APP_ID,
           'secret' => FB_SECRET,
   ));

  header('P3P:CP="IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT"');
  $user = $facebook->getUser();
  $scope = FB_SCOPE;
  if ($user) {
     $logoutUrl = $facebook->getLogoutUrl();
  } else {
     $loginUrl = $facebook->getLoginUrl(array('scope' => $scope, 'redirect_uri' => FB_REDIRECT_URI开发者_开发技巧));
  }
  if(isset($loginUrl)) {  ?>
  <html xmlns:fb="http://www.facebook.com/2008/fbml">
    <head>
       <title>php-sdk</title> 
   <script type='text/javascript'>
         function doRedirect() {
       top.location.href = '<?= $loginUrl; ?>';
         }  
         window.setTimeout("doRedirect()", 1000);
       </script>
    </head>
    <body>
      Wait Please ...
    </body>
   </html>  
   <?
    die();
   } else { 
   ?> 
   <html xmlns:fb="http://www.facebook.com/2008/fbml">
    <head>
       <title>php-sdk</title>
   <script type='text/javascript'>
     function doRedirect() {
    if (window.top === window.self) {
        top.location.href = '<?=FB_APP_URL?>';
    }
        else {
            location.href = '<?=FB_REDIRECT_PAGE?>';
    }
     }
     window.setTimeout("doRedirect()", 1000);   
      </script>
    </head>
    <body>
      Wait Please ...
    </body>
   </html> 
 <?
 die();
 }
 ?>

PAGE.PHP

include('config.php');
require 'libs/facebook.php';
$facebook = new Facebook(array(
    'appId'  => FB_APP_ID,
    'secret' => FB_SECRET,
));
header('P3P:CP="IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT"');
$user = $facebook->getUser();
try {
  $me  =  $facebook->api('/me');
 } catch (Exception $e) {
   //header("Location: index.php");
   //die();
 }

this "page.php" is the one in which i usually get the Oauth exception. I can even catch the Oauth exception, but if i try to redirect to the index.php (in which I think the code I wrote can reissue the access token) an endless loop starts in the index.page (and page.php is never reached).

I read a post about token expiration handling, but currently i have some difficulty in understand where and how edit my codebase.

Thank you in advance

Emanuele