wspluginfile.php

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Handles web service download links.
 * @author    Guy Thomas <citricity@gmail.com>
 * @copyright Copyright (c) 2017 Blackboard Inc. (http://www.blackboard.com)
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

use tool_ally\local_file;

// Define as an AJAX_SCRIPT so exceptions are converted into JSON.
define('AJAX_SCRIPT', true);

// Web service end point does not use cookies.
define('NO_MOODLE_COOKIES', true);

require(__DIR__ . '/../../../config.php');
require_once($CFG->libdir . '/filelib.php');
require_once($CFG->dirroot . '/webservice/lib.php');

$token = required_param('token', PARAM_ALPHANUM);

$webservicelib = new webservice();
$authenticationinfo = $webservicelib->authenticate_user($token);

// Ensure that the service allows file downloads.
$enabledfiledownload = (int) ($authenticationinfo['service']->downloadfiles);
if (empty($enabledfiledownload)) {
    throw new webservice_access_exception('Web service file downloading must be enabled in external service settings');
}

$pathnamehash = required_param('pathnamehash', PARAM_ALPHANUM);

$fs = get_file_storage();
$file = $fs->get_file_by_hash($pathnamehash);
if (!$file) {
    throw new moodle_exception('filenotfound', 'error');
}
$coursecontext = local_file::course_context($file);
$cm = local_file::resolve_cm_from_file($file);
$cm = $cm ?: false;

require_login($coursecontext->instanceid, true, $cm);
send_stored_file($file, 0, 0, true);