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📄 OAuth.php(29.62 KB)
📄 OAuthBody.php(5.41 KB)
📄 TrivialStore.php(4.87 KB)
📄 ajax.php(3.18 KB)
📁 amd
📄 auth.php(6.06 KB)
📁 backup
📄 certs.php(1.16 KB)
📁 classes
📄 contentitem.php(2.43 KB)
📄 contentitem_return.php(3.75 KB)
📁 db
📄 deprecatedlib.php(1.1 KB)
📄 edit_form.php(18.63 KB)
📄 externalregistrationreturn.php(2.31 KB)
📄 grade.php(1.36 KB)
📄 index.php(4.46 KB)
📄 instructor_edit_tool_type.php(3.89 KB)
📁 lang
📄 launch.php(3.84 KB)
📄 lib.php(25.61 KB)
📄 locallib.php(158.48 KB)
📄 mod_form.js(23.42 KB)
📄 mod_form.php(18.9 KB)
📄 openid-configuration.php(2.66 KB)
📄 openid-registration.php(3.46 KB)
📁 pix
📄 register.php(4.39 KB)
📄 register_form.php(4.33 KB)
📄 registersettings.php(3.18 KB)
📄 registration.php(1.4 KB)
📄 registrationreturn.php(3.47 KB)
📄 request_tool.php(2.57 KB)
📄 return.php(4.71 KB)
📁 service
📄 service.php(7.48 KB)
📄 servicelib.php(9.89 KB)
📄 services.php(3.01 KB)
📄 settings.php(8.03 KB)
📁 source
📄 startltiadvregistration.php(2.95 KB)
📄 styles.css(7.9 KB)
📁 templates
📁 tests
📄 token.php(3.42 KB)
📄 toolconfigure.php(2.09 KB)
📄 toolproxies.php(6.4 KB)
📄 toolssettings.php(3.83 KB)
📄 typessettings.php(5.75 KB)
📄 upgrade.txt(4.24 KB)
📄 upgradelib.php(2.08 KB)
📄 version.php(2.58 KB)
📄 view.php(8.25 KB)

Editing: service.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/>.

/**
 * LTI web service endpoints
 *
 * @package mod_lti
 * @copyright  Copyright (c) 2011 Moodlerooms Inc. (http://www.moodlerooms.com)
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @author     Chris Scribner
 */

define('NO_DEBUG_DISPLAY', true);
define('NO_MOODLE_COOKIES', true);

require_once(__DIR__ . "/../../config.php");
require_once($CFG->dirroot.'/mod/lti/locallib.php');
require_once($CFG->dirroot.'/mod/lti/servicelib.php');

// TODO: Switch to core oauthlib once implemented - MDL-30149.
use mod_lti\service_exception_handler;
use moodle\mod\lti as lti;
use ltiservice_basicoutcomes\local\service\basicoutcomes;

$rawbody = file_get_contents("php://input");

$logrequests  = lti_should_log_request($rawbody);
$errorhandler = new service_exception_handler($logrequests);

// Register our own error handler so we can always send valid XML response.
set_exception_handler(array($errorhandler, 'handle'));

if ($logrequests) {
    lti_log_request($rawbody);
}

$ok = true;
$type = null;
$toolproxy = false;

$consumerkey = lti\get_oauth_key_from_headers(null, array(basicoutcomes::SCOPE_BASIC_OUTCOMES));
if ($consumerkey === false) {
    throw new Exception('Missing or invalid consumer key or access token.');
} else if (is_string($consumerkey)) {
    $toolproxy = lti_get_tool_proxy_from_guid($consumerkey);
    if ($toolproxy !== false) {
        $secrets = array($toolproxy->secret);
    } else if (!empty($tool)) {
        $secrets = array($typeconfig['password']);
    } else {
        $secrets = lti_get_shared_secrets_by_key($consumerkey);
    }
    $sharedsecret = lti_verify_message($consumerkey, lti_get_shared_secrets_by_key($consumerkey), $rawbody);
    if ($sharedsecret === false) {
        throw new Exception('Message signature not valid');
    }
}

// TODO MDL-46023 Replace this code with a call to the new library.
$origentity = lti_libxml_disable_entity_loader(true);
$xml = simplexml_load_string($rawbody);
if (!$xml) {
    lti_libxml_disable_entity_loader($origentity);
    throw new Exception('Invalid XML content');
}
lti_libxml_disable_entity_loader($origentity);

$body = $xml->imsx_POXBody;
foreach ($body->children() as $child) {
    $messagetype = $child->getName();
}

// We know more about the message, update error handler to send better errors.
$errorhandler->set_message_id(lti_parse_message_id($xml));
$errorhandler->set_message_type($messagetype);

switch ($messagetype) {
    case 'replaceResultRequest':
        $parsed = lti_parse_grade_replace_message($xml);

$ltiinstance = $DB->get_record('lti', array('id' => $parsed->instanceid));

if (!lti_accepts_grades($ltiinstance)) {
            throw new Exception('Tool does not accept grades');
        }

lti_verify_sourcedid($ltiinstance, $parsed);
        lti_set_session_user($parsed->userid);

$gradestatus = lti_update_grade($ltiinstance, $parsed->userid, $parsed->launchid, $parsed->gradeval);

if (!$gradestatus) {
            throw new Exception('Grade replace response');
        }

$responsexml = lti_get_response_xml(
                'success',
                'Grade replace response',
                $parsed->messageid,
                'replaceResultResponse'
        );

echo $responsexml->asXML();

break;

case 'readResultRequest':
        $parsed = lti_parse_grade_read_message($xml);

$ltiinstance = $DB->get_record('lti', array('id' => $parsed->instanceid));

if (!lti_accepts_grades($ltiinstance)) {
            throw new Exception('Tool does not accept grades');
        }

// Getting the grade requires the context is set.
        $context = context_course::instance($ltiinstance->course);
        $PAGE->set_context($context);

lti_verify_sourcedid($ltiinstance, $parsed);

$grade = lti_read_grade($ltiinstance, $parsed->userid);

$responsexml = lti_get_response_xml(
                'success',  // Empty grade is also 'success'.
                'Result read',
                $parsed->messageid,
                'readResultResponse'
        );

$node = $responsexml->imsx_POXBody->readResultResponse;
        $node = $node->addChild('result')->addChild('resultScore');
        $node->addChild('language', 'en');
        $node->addChild('textString', isset($grade) ? $grade : '');

echo $responsexml->asXML();

break;

case 'deleteResultRequest':
        $parsed = lti_parse_grade_delete_message($xml);

$ltiinstance = $DB->get_record('lti', array('id' => $parsed->instanceid));

if (!lti_accepts_grades($ltiinstance)) {
            throw new Exception('Tool does not accept grades');
        }

lti_verify_sourcedid($ltiinstance, $parsed);
        lti_set_session_user($parsed->userid);

$gradestatus = lti_delete_grade($ltiinstance, $parsed->userid);

if (!$gradestatus) {
            throw new Exception('Grade delete request');
        }

$responsexml = lti_get_response_xml(
                'success',
                'Grade delete request',
                $parsed->messageid,
                'deleteResultResponse'
        );

echo $responsexml->asXML();

break;

default:
        // Fire an event if we get a web service request which we don't support directly.
        // This will allow others to extend the LTI services, which I expect to be a common
        // use case, at least until the spec matures.
        $data = new stdClass();
        $data->body = $rawbody;
        $data->xml = $xml;
        $data->messageid = lti_parse_message_id($xml);
        $data->messagetype = $messagetype;
        $data->consumerkey = $consumerkey;
        $data->sharedsecret = $sharedsecret;
        $eventdata = array();
        $eventdata['other'] = array();
        $eventdata['other']['messageid'] = $data->messageid;
        $eventdata['other']['messagetype'] = $messagetype;
        $eventdata['other']['consumerkey'] = $consumerkey;

// Before firing the event, allow subplugins a chance to handle.
        if (lti_extend_lti_services($data)) {
            break;
        }

// If an event handler handles the web service, it should set this global to true
        // So this code knows whether to send an "operation not supported" or not.
        global $ltiwebservicehandled;
        $ltiwebservicehandled = false;

try {
            $event = \mod_lti\event\unknown_service_api_called::create($eventdata);
            $event->set_message_data($data);
            $event->trigger();
        } catch (Exception $e) {
            $ltiwebservicehandled = false;
        }

if (!$ltiwebservicehandled) {
            $responsexml = lti_get_response_xml(
                'unsupported',
                'unsupported',
                 lti_parse_message_id($xml),
                 $messagetype
            );

echo $responsexml->asXML();
        }

break;
}

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