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Differences Between: [Versions 401 and 402] [Versions 401 and 403]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * Return token
  19   * @package    moodlecore
  20   * @copyright  2011 Dongsheng Cai <dongsheng@moodle.com>
  21   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  22   */
  23  
  24  define('AJAX_SCRIPT', true);
  25  define('REQUIRE_CORRECT_ACCESS', true);
  26  define('NO_MOODLE_COOKIES', true);
  27  
  28  require_once(__DIR__ . '/../config.php');
  29  require_once($CFG->libdir . '/externallib.php');
  30  
  31  // Allow CORS requests.
  32  header('Access-Control-Allow-Origin: *');
  33  
  34  if (!$CFG->enablewebservices) {
  35      throw new moodle_exception('enablewsdescription', 'webservice');
  36  }
  37  
  38  // This script is used by the mobile app to check that the site is available and web services
  39  // are allowed. In this mode, no further action is needed.
  40  if (optional_param('appsitecheck', 0, PARAM_INT)) {
  41      echo json_encode((object)['appsitecheck' => 'ok']);
  42      exit;
  43  }
  44  
  45  $username = required_param('username', PARAM_USERNAME);
  46  $password = required_param('password', PARAM_RAW);
  47  $serviceshortname  = required_param('service',  PARAM_ALPHANUMEXT);
  48  
  49  echo $OUTPUT->header();
  50  
  51  $username = trim(core_text::strtolower($username));
  52  if (is_restored_user($username)) {
  53      throw new moodle_exception('restoredaccountresetpassword', 'webservice');
  54  }
  55  
  56  $systemcontext = context_system::instance();
  57  
  58  $reason = null;
  59  $user = authenticate_user_login($username, $password, false, $reason, false);
  60  if (!empty($user)) {
  61  
  62      // Cannot authenticate unless maintenance access is granted.
  63      $hasmaintenanceaccess = has_capability('moodle/site:maintenanceaccess', $systemcontext, $user);
  64      if (!empty($CFG->maintenance_enabled) and !$hasmaintenanceaccess) {
  65          throw new moodle_exception('sitemaintenance', 'admin');
  66      }
  67  
  68      if (isguestuser($user)) {
  69          throw new moodle_exception('noguest');
  70      }
  71      if (empty($user->confirmed)) {
  72          throw new moodle_exception('usernotconfirmed', 'moodle', '', $user->username);
  73      }
  74      // check credential expiry
  75      $userauth = get_auth_plugin($user->auth);
  76      if (!empty($userauth->config->expiration) and $userauth->config->expiration == 1) {
  77          $days2expire = $userauth->password_expire($user->username);
  78          if (intval($days2expire) < 0 ) {
  79              throw new moodle_exception('passwordisexpired', 'webservice');
  80          }
  81      }
  82  
  83      // let enrol plugins deal with new enrolments if necessary
  84      enrol_check_plugins($user);
  85  
  86      // setup user session to check capability
  87      \core\session\manager::set_user($user);
  88  
  89      //check if the service exists and is enabled
  90      $service = $DB->get_record('external_services', array('shortname' => $serviceshortname, 'enabled' => 1));
  91      if (empty($service)) {
  92          // will throw exception if no token found
  93          throw new moodle_exception('servicenotavailable', 'webservice');
  94      }
  95  
  96      // Get an existing token or create a new one.
  97      $token = external_generate_token_for_current_user($service);
  98      $privatetoken = $token->privatetoken;
  99      external_log_token_request($token);
 100  
 101      $siteadmin = has_capability('moodle/site:config', $systemcontext, $USER->id);
 102  
 103      $usertoken = new stdClass;
 104      $usertoken->token = $token->token;
 105      // Private token, only transmitted to https sites and non-admin users.
 106      if (is_https() and !$siteadmin) {
 107          $usertoken->privatetoken = $privatetoken;
 108      } else {
 109          $usertoken->privatetoken = null;
 110      }
 111      echo json_encode($usertoken);
 112  } else {
 113      throw new moodle_exception('invalidlogin');
 114  }