mods/_core/imscp/oauth/OAuthUtility.class.php

   1 <?php
   2 /****************************************************************/
   3 /* ATutor                                                                                                               */
   4 /****************************************************************/
   5 /* Copyright (c) 2002-2010                                      */
   6 /* Inclusive Design Institute                                   */
   7 /* http://atutor.ca                                                                                             */
   8 /*                                                              */
   9 /* This program is free software. You can redistribute it and/or*/
  10 /* modify it under the terms of the GNU General Public License  */
  11 /* as published by the Free Software Foundation.                                */
  12 /****************************************************************/
  13 // $Id$
  14
  15 /**
  16 * OAuth Utility functions
  17 * @access       public
  18 * @author       Cindy Qi Li
  19 */
  20
  21 if (!defined('AT_INCLUDE_PATH')) exit;
  22
  23 class OAuthUtility {
  24
  25         /**
  26         * This function checks whether the given URL is accessible.
  27         * @access  public
  28         * @param   URL
  29         * @return  true if accessible, otherwise, false
  30         * @author  Cindy Qi Li
  31         */
  32         public static function isAccessible($URL)
  33         {
  34                 if (!@file_get_contents($URL))
  35                         return false;
  36                 return true;
  37         }
  38
  39         /**
  40          * This function checks whether the last access token for the current user
  41          * is expired. If not, return it, otherwise, return empty.
  42          * @access public
  43          * @param  none
  44          * @return the access token if it's not expired, otherwise, empty.
  45          * @author Cindy Qi Li
  46          */
  47         public static function getUnexpiredAccessToken()
  48         {
  49                 global $db;
  50
  51                 $sql = "SELECT token,
  52                                unix_timestamp(now()) now_timestamp,
  53                                ocs.expire_threshold,
  54                                unix_timestamp(addtime(oct.assign_date, sec_to_time(ocs.expire_threshold))) expire_timestamp
  55                           FROM ".TABLE_PREFIX."oauth_client_servers ocs, ".TABLE_PREFIX."oauth_client_tokens oct
  56                          WHERE ocs.oauth_server_id=oct.oauth_server_id
  57                            AND oct.member_id=".$_SESSION['member_id']."
  58                            AND oct.token_type='access'
  59                          ORDER BY oct.assign_date DESC";
  60
  61                 $result = mysql_query($sql, $db);
  62
  63                 if (mysql_num_rows($result) == 0) {
  64                         return '';
  65                 }
  66                 else
  67                 {
  68                         $row = mysql_fetch_assoc($result);
  69
  70                         if ($row['expire_threshold'] == 0 || $row['now_timestamp'] < $row['expire_timestamp']) {
  71                                 return $row['token'];
  72                         } else {
  73                                 return '';
  74                         }
  75                 }
  76         }
  77 }
  78 ?>