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index.html
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<!DOCTYPE html>
<html>
<!-- Author: Sean Pesce -->
<head>
<link rel="shortcut icon" href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAABGdBTUEAALGPC/xhBQAAACBjSFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAABBVBMVEU/UbU/UbQ/UbY+ULI/ULM+T7BAUrc+ULM7TKg+T7E8Tq0/ULQ9T687Tao/Urc+ULQ6SqQ4SJ5CVLxCVb5DVr9CVL0dJlQoNHRBVLtEV8I8Taw/UrZEV8M6SqYkL2kfJ1gSFzQAAAAKDRwYHkMmMW01RJc6S6hDVsA8TasmMW4dJVMMDyEIChcuO4QJDBoAAQEBAQMEBgwcJFA6S6c0Q5UZIUkHCRMBAgQcJVEjLWUvPIYGBxAKDR0BAQIDBAk3R54OEicCAgUpNXY5SaM8Ta0cJE8FBg0TGTYVGzszQZExP4wXHkMZIUhAU7k9T7A2RpxDVsFBVLwuO4I4SKFBU7tBU7r///9e5KOYAAAAAWJLR0RWCg3piQAAAAd0SU1FB+cGHgwIFs0EkqsAAAC6SURBVBjTY2BAAEYmZhYkLhMrIxs7BxOSACcXNw8vHwM/OyNMRECQh5GdQUiYjZ2ZEaSSkZGRTUSUQUycU0KSQUqagZ1NRkpWTp5BQVFJWUVVTZpBXUNTS1tHgUFXT1HfwNDI2MTUTFHR3MKSgdnK2sZW0U7W3sFR0VHRyZnBRc3Vzd3DU0Lay9vDzEfGl4HRz8+fPSCQTTYogD3YjwHoBibpECZ2dgY2CWamUGmIi7jBJDsDIzcDWQAAiSYStruNAvgAAAAldEVYdGRhdGU6Y3JlYXRlADIwMjMtMDYtMzBUMTI6MDg6MjIrMDA6MDDAnJm4AAAAJXRFWHRkYXRlOm1vZGlmeQAyMDIzLTA2LTMwVDEyOjA4OjIyKzAwOjAwscEhBAAAACh0RVh0ZGF0ZTp0aW1lc3RhbXAAMjAyMy0wNi0zMFQxMjowODoyMiswMDowMObUANsAAAAASUVORK5CYII=">
<title>HTTPS Redirector | Sean P</title>
<meta id="html-redirect" http-equiv="refresh" />
<style>
body {
font: normal 11px Verdana, Arial, sans-serif;
padding: 20px;
}
pre {
background-color: rgb(230, 230, 230);
padding: 5px;
overflow-x: auto;
font-size: 11px;
}
</style>
</head>
<body>
<h2>HTTPS Redirector</h2>
<b>Author: Sean Pesce</b>
<br><br><br><br>
<span title="Redirecting to this URL"><b>Redirect URL:</b> <!-- <code id="redirect-url" style="background-color: rgb(230, 230, 230);"></code> --></span>
<br>
<input type="text" id="redirect-url" name="redirect-url" placeholder="https://example.com" style="margin-top:5px;width:80%;" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" >
<br>
<button type="button" id="redirect-button" style="margin-top:5px; font-size:1.875em;" onclick="doRedirect(true)">Redirect</button>
<br><br><br><br>
<b>Other Resources:</b>
<br><br>
<a href="https://seanpesce.github.io/" target="_blank">Sean Pesce's Homepage</a>
</body>
<script>
function htmlEscapeStr(str) {
if (str == null) {
str = '';
}
return str.replace(/&/g, '&').replace(/'/g, ''').replace(/"/g, '"').replace(/>/g, '>').replace(/</g, '<');
}
function urlEscapeStr(str) {
if (str == null) {
str = '';
}
return str.replace(/"/g, '%22').replace(/>/g, '%3c').replace(/</g, '%3e').replace(/\n/g, '%0a').replace(/\r/g, '%0d');
}
function getFragmentParameters() {
// Parse the URL fragment like the URL query segment
var fragment = window.location.hash.substring(1);
var params = {};
var paramPairs = fragment.split('&');
paramPairs.forEach(function(pair) {
var keyValue = pair.split('=');
var key = decodeURIComponent(keyValue[0]);
var value = decodeURIComponent(keyValue[1] || '');
params[key] = value;
});
return params;
}
function getFragmentParam(key, defaultVal=null) {
var params = getFragmentParameters();
var paramVal = params[key];
if ((paramVal == null || paramVal == '') && defaultVal != null) {
return defaultVal;
}
return paramVal;
}
function getFragmentParamWithAnyKey(keys, defaultVal=null) {
var paramVal = null;
for (var k of keys) {
paramVal = getFragmentParam(k);
if (paramVal) {
break;
}
}
return paramVal ? paramVal : defaultVal;
}
function getUrlParam(key, defaultVal=null) {
var queryString = window.location.search;
var urlParams = new URLSearchParams(queryString);
var paramVal = urlParams.get(key);
if ((paramVal == null || paramVal == '') && defaultVal != null) {
return defaultVal;
}
return paramVal;
}
function getUrlParamWithAnyKey(keys, defaultVal=null) {
var paramVal = null;
for (var k of keys) {
paramVal = getUrlParam(k);
if (paramVal) {
break;
}
}
return paramVal ? paramVal : defaultVal;
}
function fixRedirectUrl(url) {
if (!url) {
return '';
}
// Allow "javascript:" and "data:" URLs
var allowUnsafe = getUrlParamWithAnyKey(['unsafe', 'dangerous',], false);
if ((!allowUnsafe) || allowUnsafe == '0' || allowUnsafe.toLowerCase() == 'false' || allowUnsafe.toLowerCase() == 'no') {
allowUnsafe = false;
}
if ((!allowUnsafe) && (url.toLowerCase().startsWith('data:') || url.toLowerCase().startsWith('javascript:'))) {
console.log('Unsafe redirect URI (use parameter "unsafe=1" for these kinds of URLs): ' + url);
return null;
}
//if (url.toLowerCase().startsWith('http:')) {
// url = 'https' + url.substr(4);
//}
return url;
}
function getRedirectUrl() {
var redirectUrl = document.getElementById('redirect-url').value;
if (!redirectUrl) {
var paramKeys = ['redirectUrl', 'redirect', 'url', 'uri', 'r', 'u',];
redirectUrl = getUrlParamWithAnyKey(paramKeys, null);
if (!redirectUrl) {
redirectUrl = getFragmentParamWithAnyKey(paramKeys, null);
}
}
redirectUrl = fixRedirectUrl(redirectUrl);
return redirectUrl;
}
function doHtmlRedirect(url) {
var metaElement = document.getElementById('html-redirect');
metaElement.content = `0; URL=${urlEscapeStr(url)}`;
var headElement = document.getElementsByTagName('head')[0];
headElement.appendChild(metaElement);
}
function doRedirect(fromButton) {
var redirectUrl = getRedirectUrl();
if (!redirectUrl) {
var msg = 'Invalid redirect URI';
console.log(msg);
if (fromButton) {
alert(msg);
}
return;
}
// Use JavaScript to redirect the page instead of an HTML meta tag
var forceJsRedirect = getUrlParamWithAnyKey(['javascriptRedirect', 'jsRedirect', 'javascript', 'js', 'j',], false);
if ((!forceJsRedirect) || forceJsRedirect == '0' || forceJsRedirect.toLowerCase() == 'false' || forceJsRedirect.toLowerCase() == 'no') {
forceJsRedirect = false;
}
// Allow "javascript:" and "data:" URLs
var allowJsUri = getUrlParamWithAnyKey(['unsafe', 'dangerous',], false);
if ((!allowJsUri) || allowJsUri == '0' || allowJsUri.toLowerCase() == 'false' || allowJsUri.toLowerCase() == 'no') {
allowJsUri = false;
}
if (forceJsRedirect || redirectUrl.toLowerCase().startsWith('javascript:')) {
window.location.href = redirectUrl;
} else {
doHtmlRedirect(redirectUrl);
}
}
var redirectUrl = getRedirectUrl();
var redirectUrlElement = document.getElementById('redirect-url').value = redirectUrl;
// redirectUrlElement.innerHTML = htmlEscapeStr(redirectUrl);
doRedirect();
</script>
</html>