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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head>
<meta charset="utf-8">
<meta name="generator" content="quarto-1.8.25">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
<title>Password-Protected Content Example</title>
<style>
code{white-space: pre-wrap;}
span.smallcaps{font-variant: small-caps;}
div.columns{display: flex; gap: min(4vw, 1.5em);}
div.column{flex: auto; overflow-x: auto;}
div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
ul.task-list{list-style: none;}
ul.task-list li input[type="checkbox"] {
width: 0.8em;
margin: 0 0.8em 0.2em -1em; /* quarto-specific, see https://github.com/quarto-dev/quarto-cli/issues/4556 */
vertical-align: middle;
}
/* CSS for syntax highlighting */
html { -webkit-text-size-adjust: 100%; }
pre > code.sourceCode { white-space: pre; position: relative; }
pre > code.sourceCode > span { display: inline-block; line-height: 1.25; }
pre > code.sourceCode > span:empty { height: 1.2em; }
.sourceCode { overflow: visible; }
code.sourceCode > span { color: inherit; text-decoration: inherit; }
div.sourceCode { margin: 1em 0; }
pre.sourceCode { margin: 0; }
@media screen {
div.sourceCode { overflow: auto; }
}
@media print {
pre > code.sourceCode { white-space: pre-wrap; }
pre > code.sourceCode > span { text-indent: -5em; padding-left: 5em; }
}
pre.numberSource code
{ counter-reset: source-line 0; }
pre.numberSource code > span
{ position: relative; left: -4em; counter-increment: source-line; }
pre.numberSource code > span > a:first-child::before
{ content: counter(source-line);
position: relative; left: -1em; text-align: right; vertical-align: baseline;
border: none; display: inline-block;
-webkit-touch-callout: none; -webkit-user-select: none;
-khtml-user-select: none; -moz-user-select: none;
-ms-user-select: none; user-select: none;
padding: 0 4px; width: 4em;
}
pre.numberSource { margin-left: 3em; padding-left: 4px; }
div.sourceCode
{ }
@media screen {
pre > code.sourceCode > span > a:first-child::before { text-decoration: underline; }
}
</style>
<script src="example_files/libs/clipboard/clipboard.min.js"></script>
<script src="example_files/libs/quarto-html/quarto.js" type="module"></script>
<script src="example_files/libs/quarto-html/tabsets/tabsets.js" type="module"></script>
<script src="example_files/libs/quarto-html/axe/axe-check.js" type="module"></script>
<script src="example_files/libs/quarto-html/popper.min.js"></script>
<script src="example_files/libs/quarto-html/tippy.umd.min.js"></script>
<script src="example_files/libs/quarto-html/anchor.min.js"></script>
<link href="example_files/libs/quarto-html/tippy.css" rel="stylesheet">
<link href="example_files/libs/quarto-html/quarto-syntax-highlighting-7b89279ff1a6dce999919e0e67d4d9ec.css" rel="stylesheet" id="quarto-text-highlighting-styles">
<script src="example_files/libs/bootstrap/bootstrap.min.js"></script>
<link href="example_files/libs/bootstrap/bootstrap-icons.css" rel="stylesheet">
<link href="example_files/libs/bootstrap/bootstrap-9e3ffae467580fdb927a41352e75a2e0.min.css" rel="stylesheet" append-hash="true" id="quarto-bootstrap" data-mode="light">
</head>
<body class="fullcontent quarto-light">
<div id="quarto-content" class="page-columns page-rows-contents page-layout-article">
<main class="content" id="quarto-document-content">
<header id="title-block-header" class="quarto-title-block default">
<div class="quarto-title">
<h1 class="title">Password-Protected Content Example</h1>
</div>
<div class="quarto-title-meta">
</div>
</header>
<section id="password-protected-content-extension-demo" class="level1">
<h1>Password-Protected Content Extension Demo</h1>
<p>This document demonstrates the password-protected content extension.</p>
<section id="example-1-simple-solution" class="level2">
<h2 class="anchored" data-anchor-id="example-1-simple-solution">Example 1: Simple Solution</h2>
<p><strong>Exercise:</strong> Write a Python function that adds two numbers.</p>
<p>Try to solve this yourself first!</p>
<div class="password-protected-container" id="password-content-1">
<div class="password-prompt">
<div class="password-box">
<h4 class="anchored">🔒 Solution Locked</h4>
<div class="password-input-group">
<input type="text" id="password-content-1-input" class="password-input" placeholder="Enter 5-character password" maxlength="5" style="text-transform: uppercase;">
<button onclick="unlockContent_1()" class="password-submit">Unlock</button>
</div>
<div id="password-content-1-error" class="password-error" style="display: none;">
❌ Incorrect password. Please try again.
</div>
</div>
</div>
<div id="password-content-1-content" class="password-protected-content" style="display: none;">
<!-- Content will be decrypted and inserted here -->
</div>
</div>
<script>
(function() {
const encryptedData_1 = '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';
const passwordHash_1 = 'cfc6121';
function hashPassword(password) {
let hash = 5381;
for (let i = 0; i < password.length; i++) {
hash = ((hash * 33) + password.charCodeAt(i)) >>> 0;
}
return hash.toString(16);
}
function xorDecrypt(hexStr, password) {
let decrypted = '';
const keyLen = password.length;
for (let i = 0; i < hexStr.length; i += 2) {
const charCode = parseInt(hexStr.substr(i, 2), 16);
const keyCode = password.charCodeAt((i / 2) % keyLen);
decrypted += String.fromCharCode(charCode ^ keyCode);
}
// URL decode to restore UTF-8 characters
return decodeURIComponent(decrypted);
}
window.unlockContent_1 = function() {
const input = document.getElementById('password-content-1-input');
const password = input.value.toUpperCase().trim();
const errorDiv = document.getElementById('password-content-1-error');
if (hashPassword(password) === passwordHash_1) {
// Decrypt and show content
const decrypted = xorDecrypt(encryptedData_1, password);
document.getElementById('password-content-1-content').innerHTML = decrypted;
document.getElementById('password-content-1-content').style.display = 'block';
document.querySelector('#password-content-1 .password-prompt').style.display = 'none';
errorDiv.style.display = 'none';
// Store password for this session
sessionStorage.setItem('password-content-1-password', password);
} else {
errorDiv.style.display = 'block';
input.value = '';
input.focus();
}
};
// Check if already unlocked in this session
const savedPassword = sessionStorage.getItem('password-content-1-password');
if (savedPassword && hashPassword(savedPassword) === passwordHash_1) {
const decrypted = xorDecrypt(encryptedData_1, savedPassword);
document.getElementById('password-content-1-content').innerHTML = decrypted;
document.getElementById('password-content-1-content').style.display = 'block';
document.querySelector('#password-content-1 .password-prompt').style.display = 'none';
}
// Allow Enter key to submit
document.getElementById('password-content-1-input').addEventListener('keypress', function(e) {
if (e.key === 'Enter') {
unlockContent_1();
}
});
})();
</script>
<style>
.password-protected-container {
margin: 1.5em 0;
}
.password-prompt {
display: flex;
justify-content: center;
align-items: center;
min-height: 200px;
}
.password-box {
background: #f8f9fa;
border: 2px solid #dee2e6;
border-radius: 8px;
padding: 2em;
max-width: 500px;
width: 100%;
text-align: center;
}
.password-box h4 {
margin-top: 0;
color: #495057;
}
.password-box p {
color: #6c757d;
margin-bottom: 1.5em;
}
.password-input-group {
display: flex;
gap: 0.5em;
margin-bottom: 1em;
}
.password-input {
flex: 1;
padding: 0.75em;
border: 2px solid #ced4da;
border-radius: 4px;
font-size: 1.1em;
font-family: monospace;
text-align: center;
letter-spacing: normal;
}
.password-input:focus {
outline: none;
border-color: #007bff;
box-shadow: 0 0 0 0.2rem rgba(0,123,255,.25);
}
.password-submit {
padding: 0.75em 1.5em;
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-weight: 600;
transition: background-color 0.2s;
}
.password-submit:hover {
background-color: #0056b3;
}
.password-submit:active {
background-color: #004085;
}
.password-error {
color: #dc3545;
font-weight: 600;
margin-top: 0.5em;
}
.password-protected-content {
animation: fadeIn 0.5s;
}
@keyframes fadeIn {
from { opacity: 0; }
to { opacity: 1; }
}
</style>
</section>
<section id="example-2-complex-solution-with-multiple-blocks" class="level2">
<h2 class="anchored" data-anchor-id="example-2-complex-solution-with-multiple-blocks">Example 2: Complex Solution with Multiple Blocks</h2>
<p><strong>Exercise:</strong> Create a sklearn pipeline for data processing.</p>
<div class="password-protected-container" id="password-content-2">
<div class="password-prompt">
<div class="password-box">
<h4 class="anchored">🔒 Solution Locked</h4>
<div class="password-input-group">
<input type="text" id="password-content-2-input" class="password-input" placeholder="Enter 5-character password" maxlength="5" style="text-transform: uppercase;">
<button onclick="unlockContent_2()" class="password-submit">Unlock</button>
</div>
<div id="password-content-2-error" class="password-error" style="display: none;">
❌ Incorrect password. Please try again.
</div>
</div>
</div>
<div id="password-content-2-content" class="password-protected-content" style="display: none;">
<!-- Content will be decrypted and inserted here -->
</div>
</div>
<script>
(function() {
const encryptedData_2 = '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';
const passwordHash_2 = 'cf81fbe';
function hashPassword(password) {
let hash = 5381;
for (let i = 0; i < password.length; i++) {
hash = ((hash * 33) + password.charCodeAt(i)) >>> 0;
}
return hash.toString(16);
}
function xorDecrypt(hexStr, password) {
let decrypted = '';
const keyLen = password.length;
for (let i = 0; i < hexStr.length; i += 2) {
const charCode = parseInt(hexStr.substr(i, 2), 16);
const keyCode = password.charCodeAt((i / 2) % keyLen);
decrypted += String.fromCharCode(charCode ^ keyCode);
}
// URL decode to restore UTF-8 characters
return decodeURIComponent(decrypted);
}
window.unlockContent_2 = function() {
const input = document.getElementById('password-content-2-input');
const password = input.value.toUpperCase().trim();
const errorDiv = document.getElementById('password-content-2-error');
if (hashPassword(password) === passwordHash_2) {
// Decrypt and show content
const decrypted = xorDecrypt(encryptedData_2, password);
document.getElementById('password-content-2-content').innerHTML = decrypted;
document.getElementById('password-content-2-content').style.display = 'block';
document.querySelector('#password-content-2 .password-prompt').style.display = 'none';
errorDiv.style.display = 'none';
// Store password for this session
sessionStorage.setItem('password-content-2-password', password);
} else {
errorDiv.style.display = 'block';
input.value = '';
input.focus();
}
};
// Check if already unlocked in this session
const savedPassword = sessionStorage.getItem('password-content-2-password');
if (savedPassword && hashPassword(savedPassword) === passwordHash_2) {
const decrypted = xorDecrypt(encryptedData_2, savedPassword);
document.getElementById('password-content-2-content').innerHTML = decrypted;
document.getElementById('password-content-2-content').style.display = 'block';
document.querySelector('#password-content-2 .password-prompt').style.display = 'none';
}
// Allow Enter key to submit
document.getElementById('password-content-2-input').addEventListener('keypress', function(e) {
if (e.key === 'Enter') {
unlockContent_2();
}
});
})();
</script>
<style>
.password-protected-container {
margin: 1.5em 0;
}
.password-prompt {
display: flex;
justify-content: center;
align-items: center;
min-height: 200px;
}
.password-box {
background: #f8f9fa;
border: 2px solid #dee2e6;
border-radius: 8px;
padding: 2em;
max-width: 500px;
width: 100%;
text-align: center;
}
.password-box h4 {
margin-top: 0;
color: #495057;
}
.password-box p {
color: #6c757d;
margin-bottom: 1.5em;
}
.password-input-group {
display: flex;
gap: 0.5em;
margin-bottom: 1em;
}
.password-input {
flex: 1;
padding: 0.75em;
border: 2px solid #ced4da;
border-radius: 4px;
font-size: 1.1em;
font-family: monospace;
text-align: center;
letter-spacing: normal;
}
.password-input:focus {
outline: none;
border-color: #007bff;
box-shadow: 0 0 0 0.2rem rgba(0,123,255,.25);
}
.password-submit {
padding: 0.75em 1.5em;
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-weight: 600;
transition: background-color 0.2s;
}
.password-submit:hover {
background-color: #0056b3;
}
.password-submit:active {
background-color: #004085;
}
.password-error {
color: #dc3545;
font-weight: 600;
margin-top: 0.5em;
}
.password-protected-content {
animation: fadeIn 0.5s;
}
@keyframes fadeIn {
from { opacity: 0; }
to { opacity: 1; }
}
</style>
</section>
<section id="example-3-short-solution" class="level2">
<h2 class="anchored" data-anchor-id="example-3-short-solution">Example 3: Short Solution</h2>
<p><strong>Exercise:</strong> What is the capital of France?</p>
<div class="password-protected-container" id="password-content-3">
<div class="password-prompt">
<div class="password-box">
<h4 class="anchored">🔒 Solution Locked</h4>
<div class="password-input-group">
<input type="text" id="password-content-3-input" class="password-input" placeholder="Enter 5-character password" maxlength="5" style="text-transform: uppercase;">
<button onclick="unlockContent_3()" class="password-submit">Unlock</button>
</div>
<div id="password-content-3-error" class="password-error" style="display: none;">
❌ Incorrect password. Please try again.
</div>
</div>
</div>
<div id="password-content-3-content" class="password-protected-content" style="display: none;">
<!-- Content will be decrypted and inserted here -->
</div>
</div>
<script>
(function() {
const encryptedData_3 = '7c7b0233646a0d6470022a3c332c2f3e6d720600373b3626337c7b0066721a6d7305322d3a2e2d267c7b04667369182031282a6d7200646b0e3166721c';
const passwordHash_3 = 'e721dab';
function hashPassword(password) {
let hash = 5381;
for (let i = 0; i < password.length; i++) {
hash = ((hash * 33) + password.charCodeAt(i)) >>> 0;
}
return hash.toString(16);
}
function xorDecrypt(hexStr, password) {
let decrypted = '';
const keyLen = password.length;
for (let i = 0; i < hexStr.length; i += 2) {
const charCode = parseInt(hexStr.substr(i, 2), 16);
const keyCode = password.charCodeAt((i / 2) % keyLen);
decrypted += String.fromCharCode(charCode ^ keyCode);
}
// URL decode to restore UTF-8 characters
return decodeURIComponent(decrypted);
}
window.unlockContent_3 = function() {
const input = document.getElementById('password-content-3-input');
const password = input.value.toUpperCase().trim();
const errorDiv = document.getElementById('password-content-3-error');
if (hashPassword(password) === passwordHash_3) {
// Decrypt and show content
const decrypted = xorDecrypt(encryptedData_3, password);
document.getElementById('password-content-3-content').innerHTML = decrypted;
document.getElementById('password-content-3-content').style.display = 'block';
document.querySelector('#password-content-3 .password-prompt').style.display = 'none';
errorDiv.style.display = 'none';
// Store password for this session
sessionStorage.setItem('password-content-3-password', password);
} else {
errorDiv.style.display = 'block';
input.value = '';
input.focus();
}
};
// Check if already unlocked in this session
const savedPassword = sessionStorage.getItem('password-content-3-password');
if (savedPassword && hashPassword(savedPassword) === passwordHash_3) {
const decrypted = xorDecrypt(encryptedData_3, savedPassword);
document.getElementById('password-content-3-content').innerHTML = decrypted;
document.getElementById('password-content-3-content').style.display = 'block';
document.querySelector('#password-content-3 .password-prompt').style.display = 'none';
}
// Allow Enter key to submit
document.getElementById('password-content-3-input').addEventListener('keypress', function(e) {
if (e.key === 'Enter') {
unlockContent_3();
}
});
})();
</script>
<style>
.password-protected-container {
margin: 1.5em 0;
}
.password-prompt {
display: flex;
justify-content: center;
align-items: center;
min-height: 200px;
}
.password-box {
background: #f8f9fa;
border: 2px solid #dee2e6;
border-radius: 8px;
padding: 2em;
max-width: 500px;
width: 100%;
text-align: center;
}
.password-box h4 {
margin-top: 0;
color: #495057;
}
.password-box p {
color: #6c757d;
margin-bottom: 1.5em;
}
.password-input-group {
display: flex;
gap: 0.5em;
margin-bottom: 1em;
}
.password-input {
flex: 1;
padding: 0.75em;
border: 2px solid #ced4da;
border-radius: 4px;
font-size: 1.1em;
font-family: monospace;
text-align: center;
letter-spacing: normal;
}
.password-input:focus {
outline: none;
border-color: #007bff;
box-shadow: 0 0 0 0.2rem rgba(0,123,255,.25);
}
.password-submit {
padding: 0.75em 1.5em;
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-weight: 600;
transition: background-color 0.2s;
}
.password-submit:hover {
background-color: #0056b3;
}
.password-submit:active {
background-color: #004085;
}
.password-error {
color: #dc3545;
font-weight: 600;
margin-top: 0.5em;
}
.password-protected-content {
animation: fadeIn 0.5s;
}
@keyframes fadeIn {
from { opacity: 0; }
to { opacity: 1; }
}
</style>
</section>
<section id="how-to-use" class="level2">
<h2 class="anchored" data-anchor-id="how-to-use">How to Use</h2>
<section id="creating-password-protected-content" class="level3">
<h3 class="anchored" data-anchor-id="creating-password-protected-content">Creating Password-Protected Content</h3>
<p>Wrap your solution in a div with the <code>content-password</code> class and a unique <code>name</code> attribute:</p>
<div class="code-copy-outer-scaffold"><div class="sourceCode" id="cb1"><pre class="sourceCode markdown code-with-copy"><code class="sourceCode markdown"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a>:::{.content-password name="my-solution"}</span>
<span id="cb1-2"><a href="#cb1-2" aria-hidden="true" tabindex="-1"></a>Your solution content here...</span>
<span id="cb1-3"><a href="#cb1-3" aria-hidden="true" tabindex="-1"></a>:::</span></code></pre></div><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></div>
<p>The <code>name</code> attribute: - Determines the password (same name = same password) - Keeps password stable even if content changes - Should be unique and descriptive (e.g., “exercise-1”, “sklearn-pipeline”) - If omitted, defaults to “solution-1”, “solution-2”, etc.</p>
</section>
<section id="for-students-include-solutions-false" class="level3">
<h3 class="anchored" data-anchor-id="for-students-include-solutions-false">For Students (include-solutions: false)</h3>
<ol type="1">
<li>Try to solve the exercise yourself</li>
<li>When instructor shares the password, enter it in the password field</li>
<li>Click “Unlock” or press Enter</li>
<li>Solution will be revealed and remain visible during your session</li>
</ol>
</section>
<section id="for-instructors-include-solutions-true" class="level3">
<h3 class="anchored" data-anchor-id="for-instructors-include-solutions-true">For Instructors (include-solutions: true)</h3>
<ol type="1">
<li>Render with <code>include-solutions: true</code> in YAML</li>
<li>Collapsible blue boxes will show passwords for each solution (click to reveal)</li>
<li>The solution name is displayed in the header</li>
<li>Share passwords with students progressively during class</li>
<li>Students can unlock solutions at their own pace</li>
</ol>
</section>
</section>
<section id="security" class="level2">
<h2 class="anchored" data-anchor-id="security">Security</h2>
<p><strong>Password Protection:</strong> Passwords are NOT stored in the HTML source code. Only a one-way hash is included, making it impossible to extract the password by viewing the page source. The content is encrypted with the password, and can only be decrypted by entering the correct password.</p>
</section>
<section id="testing" class="level2">
<h2 class="anchored" data-anchor-id="testing">Testing</h2>
<p>To test this example:</p>
<p><strong>Student view:</strong></p>
<div class="code-copy-outer-scaffold"><div class="sourceCode" id="cb2"><pre class="sourceCode bash code-with-copy"><code class="sourceCode bash"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a><span class="ex">quarto</span> render example.qmd</span></code></pre></div><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></div>
<p><strong>Instructor view:</strong></p>
<div class="code-copy-outer-scaffold"><div class="sourceCode" id="cb3"><pre class="sourceCode bash code-with-copy"><code class="sourceCode bash"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a><span class="ex">quarto</span> render example.qmd <span class="at">-M</span> include-solutions:true</span></code></pre></div><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></div>
<p>Or change the YAML front matter <code>include-solutions: false</code> to <code>include-solutions: true</code>.</p>
</section>
</section>
</main>
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