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lsloan/ Basic LTI Launcher

Forked from matthanger/blti-launch.php
Last active March 26, 2021 03:56
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Basic LTI Launcher
See the entry point in file "blti-launch.html".
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.gitignore
lticonf.php
.idea
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blti-launch.css
input:read-only {
background-color: #D6D6D6;
}
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blti-launch.html
<html>
<head>
<script type="text/javascript" src="//code.jquery.com/jquery-2.1.4.min.js"></script>
<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/hmac-sha1.js"></script>
<script type="text/javascript"
src="//cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/components/enc-base64.js"></script>
<script type="text/javascript" src="blti-launch.js"></script>
<link rel="stylesheet" href="blti-launch.css"/>
</head>
<body>
<h2>LTI configuration parameters</h2>
<form id="ltiConfigurationForm" onsubmit="updateLtiLaunchForm(); return false;">
<ul>
<li>
<label>Launch URL:
<input id="launchUrl" value="" type="text" size="80"/></label>
</li>
<li>
<label>Key:
<input id="key" value="" type="text" size="80"/></label>
</li>
<li>
<label>Secret:
<input id="secret" value="" type="text" size="80"/></label>
</li>
</ul>
<button type="submit" style="display: none;"></button>
</form>
<h2>LTI launch parameters</h2>
<form id="ltiLaunchForm" name="ltiLaunchForm" method="POST" action="" onsubmit="updateLtiLaunchForm()">
<ul>
<li><label>user_id:
<input type="text" name="user_id" value="0ae836b9-7fc9-4060-006f-27b2066ac545"></label></li>
<li><label>roles:
<input type="text" name="roles" value="Instructor"></label></li>
<li><label>resource_link_id:
<input type="text" name="resource_link_id" value="88391-e1919-bb3456"></label></li>
<li><label>resource_link_title:
<input type="text" name="resource_link_title" value="My Weekly Wiki"></label></li>
<li><label>resource_link_description:
<input type="text" name="resource_link_description"
value="A weekly wiki."></label></li>
<li><label>lis_person_name_full:
<input type="text" name="lis_person_name_full" value="Jane Q. Public"></label>
</li>
<li><label>lis_person_name_family:
<input type="text" name="lis_person_name_family" value="Public"></label></li>
<li><label>lis_person_name_given:
<input type="text" name="lis_person_name_given" value="Jane"></label></li>
<li><label>lis_person_contact_email_primary:
<input type="text" name="lis_person_contact_email_primary"
value="user@school.edu"></label></li>
<li><label>lis_person_sourcedid:
<input type="text" name="lis_person_sourcedid" value="school.edu:user"></label>
</li>
<li><label>context_id:
<input type="text" name="context_id" value="8213060-006f-27b2066ac545"></label></li>
<li><label>context_title:
<input type="text" name="context_title"
value="Design of Personal Environments"></label></li>
<li><label>context_label:
<input type="text" name="context_label" value="SI182"></label></li>
<li><label>tool_consumer_instance_guid:
<input type="text" name="tool_consumer_instance_guid"
value="lmsng.school.edu"></label></li>
<li><label>tool_consumer_instance_description:
<input type="text" name="tool_consumer_instance_description"
value="University of School (LMSng)"></label></li>
<li><label>lti_version:
<input type="text" name="lti_version" value="LTI-1p0"></label></li>
<li><label>lti_message_type:
<input type="text" name="lti_message_type"
value="basic-lti-launch-request"></label></li>
<li><label>oauth_callback:
<input type="text" name="oauth_callback" value="about:blank"></label></li>
<li><label>oauth_consumer_key:
<input type="text" name="oauth_consumer_key" id="oauth_consumer_key" readonly
value=""></label></li>
<li><label>oauth_version:
<input type="text" name="oauth_version" value="1.0"></label></li>
<li><label>oauth_nonce:
<input type="text" name="oauth_nonce" id="oauth_nonce" value=""></label></li>
<li><label>oauth_timestamp:
<input type="text" name="oauth_timestamp" id="oauth_timestamp" value=""></label>
</li>
<li><label>oauth_signature_method:
<input type="text" name="oauth_signature_method" value="HMAC-SHA1"></label>
</li>
<li>oauth_signature:
<input type="text" readonly name="oauth_signature" id="oauth_signature" value=""
size="40"> <input type="button" value="Refresh"
onclick="updateLtiLaunchForm(); return false;"/></li>
</ul>
<p>
<button type="submit">Launch</button>
</p>
</form>
</body>
</html>
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blti-launch.js
(function () {
window.onload = function () {
$('#launchUrl').val('http://dr-chuck.com/ims/php-simple/tool.php');
$('#key').val('THX1138');
$('#secret').val('secret');
updateLtiLaunchForm();
};
this.updateLtiLaunchForm = function () {
var launchUrl = $('#launchUrl').val();
var encodedSecret = encodeURIComponent($('#secret').val()) + '&';
var $ltiLaunchForm = $('#ltiLaunchForm');
$ltiLaunchForm.attr('action', launchUrl);
$('#oauth_consumer_key').val($('#key').val());
$('#oauth_timestamp').val(Math.floor(new Date().getTime() / 1000));
$('#oauth_nonce').val(uniqid('', true));
var fields = [];
$('input[type="text"]', $ltiLaunchForm).not('[name="oauth_signature"]').each(function () {
var input = $(this);
fields.push(input.attr('name') + '=' + rawurlencode(input.val()));
});
var message = 'POST&' + encodeURIComponent(launchUrl) + '&' +
rawurlencode(fields.sort().join('&'));
var oauthSignature = CryptoJS.enc.Base64.stringify(CryptoJS.HmacSHA1(message, encodedSecret));
$('#oauth_signature').val(oauthSignature);
};
this.rawurlencode = function (str) {
str = (str + '').toString();
return encodeURIComponent(str).replace(/!/g, '%21').replace(/'/g, '%27').replace(/\(/g, '%28').
replace(/\)/g, '%29').replace(/\*/g, '%2A');
};
this.uniqid = function (prefix, moreEntropy) {
prefix = prefix || '';
moreEntropy = moreEntropy || false;
var result;
this.formatSeed = function (seed, width) {
seed = parseInt(seed, 10).toString(16);
return width < seed.length
? seed.slice(seed.length - width)
: ((width > seed.length) ? new Array(1 + (width - seed.length)).join('0') + seed : seed);
};
result = prefix + this.formatSeed(parseInt(new Date().getTime() / 1000, 10), 8) + this.formatSeed(Math.floor(Math.random() * 0x75bcd15) + 1, 5);
if (moreEntropy) result += (Math.random() * 10).toFixed(8).toString();
return result;
};
})();
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