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templates.go
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package main
/*
- https://projects.lukehaas.me/css-loaders/
- https://jshint.com/
- https://cdnjs.com/libraries/js-sha1
- https://cdnjs.cloudflare.com/ajax/libs/js-sha1/0.6.0/sha1.min.js
- https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/POST
- https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams
*/
const challengeHTMLTemplate = `
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1">
<meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate"/>
<meta http-equiv="refresh" content="30"/>
<title>Loading...</title>
<style>
.center {
margin: 0;
position: absolute;
top: 50%;
left: 50%;
-ms-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
}
.loader, .loader:before, .loader:after {
border-radius: 50%;
width: 2.5em;
height: 2.5em;
-webkit-animation-fill-mode: both;
animation-fill-mode: both;
-webkit-animation: load7 1.8s infinite ease-in-out;
animation: load7 1.8s infinite ease-in-out;
}
.loader {
color: #b00015;
font-size: 10px;
margin: 80px auto;
position: relative;
text-indent: -9999em;
-webkit-transform: translateZ(0);
-ms-transform: translateZ(0);
transform: translateZ(0);
-webkit-animation-delay: -0.16s;
animation-delay: -0.16s;
}
.loader:before, .loader:after {
content: '';
position: absolute;
top: 0;
}
.loader:before {
left: -3.5em;
-webkit-animation-delay: -0.32s;
animation-delay: -0.32s;
}
.loader:after {
left: 3.5em;
}
@-webkit-keyframes load7 {
0%,
80%,
100% {
box-shadow: 0 2.5em 0 -1.3em;
}
40% {
box-shadow: 0 2.5em 0 0;
}
}
@keyframes load7 {
0%,
80%,
100% {
box-shadow: 0 2.5em 0 -1.3em;
}
40% {
box-shadow: 0 2.5em 0 0;
}
}
</style>
<script type="text/javascript" src="{{ .JSHashLibraryURL }}"></script>
<script>
function getRandomNumber(max) {
return Math.floor(Math.random() * max);
}
function getCookie(name) {
var matches = document.cookie.match(new RegExp(
'(?:^|; )' + name.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g, '\\$1') + '=([^;]*)'
));
return matches ? decodeURIComponent(matches[1]) : undefined;
}
function deleteCookie(name) {
document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:01 GMT;';
}
function getStringHash(s) {
return sha1(s);
}
function computeResponce(challenge, response, maxNum) {
var kChallenge = getCookie(challenge);
deleteCookie(challenge);
var computeTimer = setInterval(function() {
var nonce = getRandomNumber(maxNum);
var nChallenge = getStringHash(navigator.userAgent + nonce);
if (kChallenge == nChallenge) {
clearInterval(computeTimer);
var xhr = new XMLHttpRequest();
var data = new URLSearchParams();
data.append(challenge, kChallenge);
data.append(response, nonce);
xhr.open('POST', '/', true);
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
xhr.send(data);
xhr.onreadystatechange = function() {
if (this.readyState != 4) return;
window.location.assign(window.location.href);
document.location.reload(true);
};
}
}, 10);
}
</script>
<script>
document.addEventListener('DOMContentLoaded', function() {
computeResponce('{{ .ChallengeName }}', '{{ .ResponseName }}', '{{ .MaxNonce }}');
});
</script>
</head>
<body>
<div class="center">
<div class="loader"></div>
</div>
</body>
</html>
`
const challengeLightHTMLTemplate = `
<script type="text/javascript" src="{{ .JSHashLibraryURL }}"></script>
<script>
function getRandomNumber(max) {
return Math.floor(Math.random() * max);
}
function getCookie(name) {
var matches = document.cookie.match(new RegExp(
'(?:^|; )' + name.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g, '\\$1') + '=([^;]*)'
));
return matches ? decodeURIComponent(matches[1]) : undefined;
}
function deleteCookie(name) {
document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:01 GMT;';
}
function getStringHash(s) {
return sha1(s);
}
function computeResponce(challenge, response, maxNum) {
var kChallenge = getCookie(challenge);
deleteCookie(challenge);
var computeTimer = setInterval(function() {
var nonce = getRandomNumber(maxNum);
var nChallenge = getStringHash(navigator.userAgent + nonce);
if (kChallenge == nChallenge) {
clearInterval(computeTimer);
var xhr = new XMLHttpRequest();
var data = new URLSearchParams();
data.append(challenge, kChallenge);
data.append(response, nonce);
xhr.open('POST', '/', true);
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
xhr.send(data);
xhr.onreadystatechange = function() {
if (this.readyState != 4) return;
window.location.assign(window.location.href);
document.location.reload(true);
};
}
}, 10);
}
</script>
<script>
document.addEventListener('DOMContentLoaded', function() {
computeResponce('{{ .ChallengeName }}', '{{ .ResponseName }}', '{{ .MaxNonce }}');
});
</script>
`