[Summary view]

Differences Between: [Versions 310 and 401] [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   * Render a page containing a simple form which reposts to self via JS.
  19   *
  20   * The purpose of this form is to resend a cross-site request to self, which allows the browsers to include the Moodle
  21   * session cookie alongside the original POST data, allowing LTI flows to function despite browsers blocking
  22   * cross-site cookies.
  23   *
  24   * @copyright  2021 Cengage
  25   * @package    mod_lti
  26   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  27   */
  28  namespace mod_lti\output;
  29  
  30  defined('MOODLE_INTERNAL') || die;
  31  
  32  require_once($CFG->dirroot.'/mod/lti/locallib.php');
  33  
  34  use renderable;
  35  use templatable;
  36  use renderer_base;
  37  use stdClass;
  38  
  39  /**
  40   * Render a page containing a simple form which reposts to self via JS.
  41   *
  42   * The purpose of this form is to resend a cross-site request to self, which allows the browsers to include the Moodle
  43   * session cookie alongside the original POST data, allowing LTI flows to function despite browsers blocking
  44   * cross-site cookies.
  45   *
  46   * @copyright  2021 Cengage
  47   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  48   */
  49  class repost_crosssite_page implements renderable, templatable {
  50  
  51      /**
  52       * Constructor
  53       *
  54       * @param string $url moodle URL to repost to
  55       * @param array $post the POST params to be re-posted
  56       */
  57      public function __construct(string $url, array $post) {
  58          $this->params = array_map(function($k) use ($post) {
  59              return ["key" => $k, "value" => $post[$k]];
  60          }, array_keys($post));
  61          $this->url = $url;
  62      }
  63  
  64      /**
  65       * Export this data so it can be used as the context for a mustache template.
  66       *
  67       * @param renderer_base $output The renderer
  68       * @return stdClass Data to be used by the template
  69       */
  70      public function export_for_template(renderer_base $output) {
  71          $renderdata = new stdClass();
  72          $renderdata->url = $this->url;
  73          $renderdata->params = $this->params;
  74          return $renderdata;
  75      }
  76  }