<!--
~ Copyright 2016 Red Hat, Inc. and/or its affiliates
~ and other contributors as indicated by the @author tags.
~
~ Licensed under the Apache License, Version 2.0 (the "License");
~ you may not use this file except in compliance with the License.
~ You may obtain a copy of the License at
~
~ http://www.apache.org/licenses/LICENSE-2.0
~
~ Unless required by applicable law or agreed to in writing, software
~ distributed under the License is distributed on an "AS IS" BASIS,
~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
~ See the License for the specific language governing permissions and
~ limitations under the License.
-->
<html>
<body>
<script>
var init;
function checkState(clientId, origin, sessionState, callback) {
var cookie = getCookie();
if (!cookie) {
callback('changed');
} else if (!init) {
var req = new XMLHttpRequest(),
url = location.href + '/init';
url += '?client_id=' + encodeURIComponent(clientId);
url += '&origin=' + encodeURIComponent(origin);
req.open('GET', url, true);
req.onreadystatechange = function () {
if (req.readyState === 4) {
if (req.status === 204) {
init = {
clientId: clientId,
origin: origin
}
callback('unchanged');
} else if (req.status === 404) {
callback('changed');
} else {
callback('error');
}
}
};
req.send();
} else {
if (clientId === init.clientId && origin === init.origin) {
if (sessionState === cookie) {
callback('unchanged');
} else {
callback('changed');
}
} else {
callback('error');
}
}
}
function getCookie() {
var name = 'KEYCLOAK_SESSION=',
ca = document.cookie.split(';'),
i = 0,
length = ca.length,
c = null;
for (; i < length; i++) {
c = ca[i].trim();
if (c.indexOf(name) === 0) return c.substring(name.length, c.length);
}
return null;
}
function receiveMessage(event) {
var origin = event.origin,
data = event.data.split(' '),
clientId = data[0],
sessionState = data[1];
if (data.length !== 2) {
event.source.postMessage('error', origin);
}
checkState(clientId, event.origin, sessionState, function (result) {
event.source.postMessage(result, origin);
});
}
window.addEventListener('message', receiveMessage, false);
</script>
</body>
</html>